Change search
Refine search result
3456789 251 - 300 of 915
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 251. Feroci, M.
    et al.
    Den Herder, J. W.
    Bozzo, E.
    Barret, D.
    Brandt, S.
    Hernanz, M.
    Van Der Klis, M.
    Pohl, M.
    Santangelo, A.
    Stella, L.
    Watts, A.
    Wilms, J.
    Zane, S.
    Ahangarianabhari, M.
    Albertus, C.
    Alford, M.
    Alpar, A.
    Altamirano, D.
    Alvarez, L.
    Amati, L.
    Amoros, C.
    Andersson, N.
    Antonelli, A.
    Argan, A.
    Artigue, R.
    Artigues, B.
    Atteia, J. -L
    Azzarello, P.
    Bakala, P.
    Baldazzi, G.
    Balman, S.
    Barbera, M.
    Van Baren, C.
    Bhattacharyya, S.
    Baykal, A.
    Belloni, T.
    Bernardini, F.
    Bertuccio, G.
    Bianchi, S.
    Bianchini, A.
    Binko, P.
    Blay, P.
    Bocchino, F.
    Bodin, P.
    Bombaci, I.
    Bonnet Bidaud, J. -M
    Boutloukos, S.
    Bradley, L.
    Braga, J.
    Brown, E.
    Bucciantini, N.
    Burderi, L.
    Burgay, M.
    Bursa, M.
    Budtz-Jørgensen, C.
    Cackett, E.
    Cadoux, F. R.
    Caïs, P.
    Caliandro, G. A.
    Campana, R.
    Campana, S.
    Capitanio, F.
    Casares, J.
    Casella, P.
    Castro-Tirado, A. J.
    Cavazzuti, E.
    Cerda-Duran, P.
    Chakrabarty, D.
    Château, F.
    Chenevez, J.
    Coker, J.
    Cole, R.
    Collura, A.
    Cornelisse, R.
    Courvoisier, T.
    Cros, A.
    Cumming, A.
    Cusumano, G.
    D'ai, A.
    D'elia, V.
    Del Monte, E.
    De Luca, A.
    De Martino, D.
    Dercksen, J. P. C.
    De Pasquale, M.
    De Rosa, A.
    Del Santo, M.
    Di Cosimo, S.
    Diebold, S.
    Di Salvo, T.
    Donnarumma, I.
    Drago, A.
    Durant, M.
    Emmanoulopoulos, D.
    Erkut, M. H.
    Esposito, P.
    Evangelista, Y.
    Fabian, A.
    Falanga, M.
    Favre, Y.
    Feldman, C.
    Ferrari, V.
    Ferrigno, C.
    Finger, M.
    Finger, M. H.
    Fraser, G. W.
    Frericks, M.
    Fuschino, F.
    Gabler, M.
    Galloway, D. K.
    Galvez Sanchez, J. L.
    Garcia-Berro, E.
    Gendre, B.
    Gezari, S.
    Giles, A. B.
    Gilfanov, M.
    Giommi, P.
    Giovannini, G.
    Giroletti, M.
    Gogus, E.
    Goldwurm, A.
    Goluchová, K.
    Götz, D.
    Gouiffes, C.
    Grassi, M.
    Groot, P.
    Gschwender, M.
    Gualtieri, L.
    Guidorzi, C.
    Guy, L.
    Haas, D.
    Haensel, P.
    Hailey, M.
    Hansen, F.
    Hartmann, D. H.
    Haswell, C. A.
    Hebeler, K.
    Heger, A.
    Hermsen, W.
    Homan, J.
    Hornstrup, A.
    Hudec, R.
    Huovelin, J.
    Ingram, A.
    In't Zand, J. J. M.
    Israel, G.
    Iwasawa, K.
    Izzo, L.
    Jacobs, H. M.
    Jetter, F.
    Johannsen, T.
    Jonker, P.
    Josè, J.
    Kaaret, P.
    Kanbach, G.
    Karas, V.
    Karelin, D.
    Kataria, D.
    Keek, L.
    Kennedy, T.
    Klochkov, D.
    Kluzniak, W.
    Kokkotas, K.
    Korpela, S.
    Kouveliotou, C.
    Kreykenbohm, I.
    Kuiper, L. M.
    Kuvvetli, I.
    Labanti, C.
    Lai, D.
    Lamb, F. K.
    Laubert, P. P.
    Lebrun, F.
    Lin, D.
    Linder, D.
    Lodato, G.
    Longo, F.
    Lund, N.
    Maccarone, T. J.
    KTH.
    Macera, D.
    Maestre, S.
    Mahmoodifar, S.
    Maier, D.
    Malcovati, P.
    Mandel, I.
    Mangano, V.
    Manousakis, A.
    Marisaldi, M.
    Markowitz, A.
    Martindale, A.
    Matt, G.
    Mchardy, I. M.
    Melatos, A.
    Mendez, M.
    Mereghetti, S.
    Michalska, M.
    Migliari, S.
    Mignani, R.
    Miller, M. C.
    Miller, J. M.
    Mineo, T.
    Miniutti, G.
    Morsink, S.
    Motch, C.
    Motta, S.
    Mouchet, M.
    Mouret, G.
    Mulaová, J.
    Muleri, F.
    Muñoz-Darias, T.
    Negueruela, I.
    Neilsen, J.
    Norton, A. J.
    Nowak, M.
    O'brien, P.
    Olsen, P. E. H.
    Orienti, M.
    Orio, M.
    Orlandini, M.
    Orleaaski, P.
    Osborne, J. P.
    Osten, R.
    Ozel, F.
    Pacciani, L.
    Paolillo, M.
    Papitto, A.
    Paredes, J. M.
    Patruno, A.
    Paul, B.
    Perinati, E.
    Pellizzoni, A.
    Penacchioni, A. V.
    Perez, M. A.
    Petracek, V.
    Pittori, C.
    Pons, J.
    Portell, J.
    Possenti, A.
    Poutanen, J.
    Prakash, M.
    Le Provost, P.
    Psaltis, D.
    Rambaud, D.
    Ramon, P.
    Ramsay, G.
    Rapisarda, M.
    Rachevski, A.
    Rashevskaya, I.
    Ray, P. S.
    Rea, N.
    Reddy, S.
    Reig, P.
    Reina Aranda, M.
    Remillard, R.
    Reynolds, C.
    Rezzolla, L.
    Ribo, M.
    De La Rie, R.
    Riggio, A.
    Rios, A.
    Rodríguez-Gil, P.
    Rodriguez, J.
    Rohlfs, R.
    Romano, P.
    Rossi, E. M. R.
    Rozanska, A.
    Rousseau, A.
    Ryde, F.
    Sabau-Graziati, L.
    Sala, G.
    Salvaterra, R.
    Sanna, A.
    Sandberg, J.
    Scaringi, S.
    Schanne, S.
    Schee, J.
    Schmid, C.
    Shore, S.
    Schneider, R.
    Schwenk, A.
    Schwope, A. D.
    Seyler, J. -Y
    Shearer, A.
    Smith, A.
    Smith, D. M.
    Smith, P. J.
    Sochora, V.
    Soffitta, P.
    Soleri, P.
    Spencer, A.
    Stappers, B.
    Steiner, A. W.
    Stergioulas, N.
    Stratta, G.
    Strohmayer, T. E.
    Stuchlik, Z.
    Suchy, S.
    Sulemainov, V.
    Takahashi, T.
    Tamburini, F.
    Tauris, T.
    Tenzer, C.
    Tolos, L.
    Tombesi, F.
    Tomsick, J.
    Torok, G.
    Torrejon, J. M.
    Torres, D. F.
    Tramacere, A.
    Trois, A.
    Turolla, R.
    Turriziani, S.
    Uter, P.
    Uttley, P.
    Vacchi, A.
    Varniere, P.
    Vaughan, S.
    Vercellone, S.
    Vrba, V.
    Walton, D.
    Watanabe, S.
    Wawrzaszek, R.
    Webb, N.
    Weinberg, N.
    Wende, H.
    Wheatley, P.
    Wijers, R.
    Wijnands, R.
    Wille, M.
    Wilson-Hodge, C. A.
    Winter, B.
    Wood, K.
    Zampa, G.
    Zampa, N.
    Zampieri, L.
    Zdunik, L.
    Zdziarski, A.
    Zhang, B.
    Zwart, F.
    Ayre, M.
    Boenke, T.
    Corral Van Damme, C.
    Kuulkers, E.
    Lumb, D.
    The large observatory for x-ray timing2014In: Proceedings of SPIE - The International Society for Optical Engineering, 2014, Vol. 9144Conference paper (Refereed)
    Abstract [en]

    The Large Observatory For x-ray Timing (LOFT) was studied within ESA M3 Cosmic Vision framework and participated in the final downselection for a launch slot in 2022-2024. Thanks to the unprecedented combination of effective area and spectral resolution of its main instrument, LOFT will study the behaviour of matter under extreme conditions, such as the strong gravitational field in the innermost regions of accretion flows close to black holes and neutron stars, and the supranuclear densities in the interior of neutron stars. The science payload is based on a Large Area Detector (LAD, 10 m2 effective area, 2-30 keV, 240 eV spectral resolution, 1° collimated field of view) and a Wide Field Monitor (WFM, 2-50 keV, 4 steradian field of view, 1 arcmin source location accuracy, 300 eV spectral resolution). The WFM is equipped with an on-board system for bright events (e.g. GRB) localization. The trigger time and position of these events are broadcast to the ground within 30 s from discovery. In this paper we present the status of the mission at the end of its Phase A study.

  • 252. Flytzanis, C.
    et al.
    Jonsson, Fredrik
    KTH, School of Engineering Sciences (SCI), Physics.
    Frey, R.
    Photospin state selectrivity, manipulation and storage in photonic structures. Photo-spintronics2007In: Optics InfoBase Conference Papers, Optical Society of America, 2007Conference paper (Refereed)
  • 253.
    Fornara, Andrea
    et al.
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Functional Materials, FNM (Closed 20120101).
    Johansson, Petter
    Petersson, Karolina
    Gustafsson, Stefan
    Qin, Jian
    Olsson, Eva
    Ilver, Dag
    Krozer, Anatol
    Muhammed, Mamoun
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Functional Materials, FNM (Closed 20120101).
    Johansson, Christer
    KTH, School of Information and Communication Technology (ICT), Material Physics (Closed 20120101), Functional Materials, FNM (Closed 20120101).
    Tailored Magnetic Nanoparticles for Direct and Sensitive Detection of Biomolecules in Biological Samples2008In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 8, no 10, p. 3423-3428Article in journal (Refereed)
    Abstract [en]

    We developed nanoparticles with tailored magnetic properties for sensitive detection of biomolecules directly in biological samples in a single step. Thermally blocked nanoparticles obtained by thermal hydrolysis are mixed with sample solutions and the variation of the magnetic relaxation due to surface binding is used to detect the presence of biomolecules. The binding events significantly increase the hydrodynamic volume of nanoparticles, thus changing their Brownian relaxation frequency which is measured by a specifically developed AC-susceptometer.

    The system was tested for the presence of Brucella antibodies in serum samples from infected cows and the surface of the nanoparticles was functionalized with lipopolysaccarides (LPS) from Brucella abortus. The hydrodynamic volume of functionalized particles increased by 25-35% as a result of the binding of the antibodies, as measured by changes in the susceptibility in an alternating magnetic field. The method has shown high sensitivity, with detection limit of 7 nmol·L-1 in serum without any pre-treatment of the biological samples.

    The detection method is very sensitive, cost-efficient and versatile, giving a direct indication if the animal is infected or not, making it suitable for point-of care applications. The functionalization of tailored magnetic nanoparticles can be modified to suit numerous homogenous assays for a wide range of applications.

  • 254.
    Fors, Rickard
    et al.
    KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.
    Khartsev, Sergiy
    KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.
    Grishin, Alexander
    KTH, School of Engineering Sciences (SCI), Theoretical Physics, Condensed Matter Theory.
    Non-volatile giant resistance switching in metal-insulator-manganite junctions2005In: Materials and Processes for Nonvolatile Memories / [ed] Claverie, A; Tsoukalas, D; King, TJ; Slaughter, JM, WARRENDALE: MATERIALS RESEARCH SOCIETY , 2005, Vol. 830, p. 379-384Conference paper (Refereed)
    Abstract [en]

    Heteroepitaxial CeO2(80nm)/L0.67Ca0.33MnO3(400nm) film structures have been pulsed laser deposited on LaAlO3(001) single crystals to fabricate two terminal resistance switching devices. Ag/CeO2/L0.67Ca0.33MnO3 junctions exhibit reproducible switching between a high resistance state (FIRS) with insulating properties and a semiconducting or metallic low resistance state (LRS) with resistance ratios up to 10(5). Reversible electrical switching is a polar effect achievable both in continuous sweeping mode and in the pulse regime.

  • 255.
    Forsell, Mimmi
    et al.
    KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Speech Communication and Technology.
    Elenius, Kjell
    KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Speech Communication and Technology.
    Laukka, P.
    Acoustic correlates of frustration in spontaneous speech2007In: TMH-QPSR, ISSN 1104-5787, Vol. 50, no 1, p. 37-40Article in journal (Other academic)
    Abstract [en]

    The focus of this master’s thesis by the first author was to investigate the acoustic attributes of frustration in spontaneous speech. The speech material was recorded from real life Swedish telephone services by the company Voice Provider. The utterances were selected speaker by speaker in order to have at least one of them judged as emotionally neutral by a listener group, while the other utterances of the same speaker were judged as displaying emotional speech. Due to the nature of the speech material most of it was spoken in a neutral way. However, some percent of the utterances displayed various degrees of frustration, mostly anger but also some despondency, and these were the emotions studied in this report. We also studied the emotional intensity of the utterances. Acoustic cues of the emotional speech were compared to those of neutral speech for the same speaker. We found some significant differences between the acoustic cues for neutral and emotional speech. Anger was characterized by a rise of fundamental frequency and an increase in speech amplitude, whereas despondency reduced the syllable rate significantly. The emotional intensity raised the pitch, increased the amplitude and decreased the syllable rate. Correlations were also found between perceived emotions and acoustic speech parameters.

  • 256.
    Fransén, Erik
    et al.
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Kozlov, Alexander
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Xie, Yuecong
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Christensen, C.
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Djurfeldt, Mikael
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Ekeberg, Örjan
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Lansner, Anders
    KTH, School of Computer Science and Communication (CSC), Numerical Analysis and Computer Science, NADA.
    Evaluation of model scalability in parallel neural simulators2005Conference paper (Refereed)
    Abstract [en]

    A long standing belief in neuroscience has been that the brain and specifically the neocortex obtains its computational power by massive parallelism. Albeit conceptually appealing, this notion that effective processing requires large networks has not been possible to test in detailed simulations. In one project, we intend to study the generation of theta activity in the entorhinal-hippocampal system. Several simulation studies indicate that frequency and synchronization of the oscillation generated may depend on density of connectivity and/or geometry of connections. In a second project, we are studying how a model of early visual processing scales towards realistic sizes. To effectively evaluate the model, it must be scaled up to sizes where processing demands from the input given are sufficiently high, and where network size is made sufficiently large to process this information.

    We have in preliminary studies tested two parallel simulators. One is a version of pGENESIS supporting MPI from University of Sunderland, UK. The other is Split, a software produced in our own laboratory. Both have been tested on an Itanium2 cluster. Tests include variable number of processors and scaling number of neurons/compartments or number of synapses. In these simulations, average spike frequency in the network is also varied. The aim is to identify main bottle-necks. For instance, we foresee the need to parallelize the construction/layout of synapses.

  • 257. Franzén, Anders
    et al.
    Grisell, Anders
    KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Underwater Technology.
    Anders Franzén tells his story about His Majesty's ship Vasa, 1628: an interview from May 1992 recorded by Bengt Grisell2009Report (Other (popular science, discussion, etc.))
  • 258.
    Frassinetti, Lorenzo
    et al.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Olofsson, E
    KTH, School of Electrical Engineering (EES).
    Brunsell, Per
    KTH, School of Electrical Engineering (EES).
    Drake, J
    KTH, School of Electrical Engineering (EES).
    EXTRAP Coils and Tearing Mode Dynamics2011In: 16th Workshop on MHD stability control, November 20 - 22, 2011 San Diego, CA, USA, 2011Conference paper (Other academic)
  • 259.
    Frassinetti, Lorenzo
    et al.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Saarelma, S.
    Lomas, P.
    Nunes, I.
    Rimini, F.
    Beurskens, M. N. A.
    Bilkova, P.
    Boom, J. E.
    de la Luna, E.
    Delabie, E.
    Drewelow, P.
    Flanagan, J.
    Garzotti, L.
    Giroud, C.
    Hawks, N.
    Joffrin, E.
    Kempenaars, M.
    Kim, Hyun-Tae
    Kruezi, U.
    Loarte, A.
    Lomanowski, B.
    Lupelli, I.
    Meneses, L.
    Maggi, C. F.
    Menmuir, S.
    Peterka, M.
    Rachlew, Elisabeth
    KTH, School of Engineering Sciences (SCI), Physics, Atomic and Molecular Physics.
    Romanelli, M.
    Stefanikova, E.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Dimensionless scalings of confinement, heat transport and pedestal stability in JET-ILW and comparison with JET-C2017In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 59, no 1, article id 014014Article in journal (Refereed)
    Abstract [en]

    Three dimensionless scans in the normalized Larmor radius rho*, normalized collisionality nu* and normalized plasma pressure beta have been performed in JET with the ITER-like wall (JET-ILW). The normalized energy confinement and the thermal diffusivity exhibit a scaling with rho* consistent with the earlier results obtained in the carbon wall JET (JET-C) and with a gyro-Bohm scaling. In the pedestal, experimental results show that the stability is not dependent on rho*, qualitatively in agreement with the peeling-ballooning (P-B) model. The nu* dimensionless scaling shows that JET-ILW normalized confinement has a stronger dependence on collisionality than JET-C. This leads to a reduction of the difference in the confinement between JET-ILW and JET-C to approximate to 10% at low nu*. The pedestal stability shows an improvement with decreasing nu*. This is ascribed to the increase of the bootstrap current, to the reduction of the pedestal width and to the reduction of the relative shift between pedestal density and temperature position. The beta dimensionless scan shows that, at low collisionality, JET-ILW normalized confinement has no clear dependence with beta, in agreement with part of the earlier scalings. At high collisionality, a reduction of the normalized confinement with increasing beta is observed. This behaviour is driven mainly by the pedestal where the stability is reduced with increasing beta. The P-B analysis shows that the stability reduction with increasing beta at high nu* is due to the destabilizing effect of the increased relative shift.

  • 260.
    Frassinetti, Lorenzo
    et al.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Sun, Y.
    Fridström, Richard
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Menmuir, Sheena
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Olofsson, K. E. J.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Brunsell, Per R.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Khan, M. W. M.
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Liang, Y.
    Drake, James Robert
    KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
    Braking due to non-resonant magnetic perturbations and comparison with neoclassical toroidal viscosity torque in EXTRAP T2R2015In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 55, no 11, article id 112003Article in journal (Refereed)
    Abstract [en]

    The non-resonant magnetic perturbation (MP) braking is studied in the EXTRAP T2R reversed-field pinch (RFP) and the experimental braking torque is compared with the torque expected by the neoclassical toroidal viscosity (NTV) theory. The EXTRAP T2R active coils can apply magnetic perturbations with a single harmonic, either resonant or non-resonant. The non-resonant MP produces velocity braking with an experimental torque that affects a large part of the core region. The experimental torque is clearly related to the plasma displacement, consistent with a quadratic dependence as expected by the NTV theory. The work show a good qualitative agreement between the experimental torque in a RFP machine and NTV torque concerning both the torque density radial profile and the dependence on the non-resonant MP harmonic.

  • 261.
    Fredriksson, Hasse
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.
    Fredriksson, E.
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.
    A model of liquid metals and its relation to the solidification process2005In: Materials Science & Engineering: A, ISSN 0921-5093, E-ISSN 1873-4936, Vol. 413, p. 455-459Article in journal (Refereed)
    Abstract [en]

    X-ray analysis shows that a liquid is build up of clusters of atoms with a certain number of nearest neighbours. The X-ray analysis shows that 8-11 nearest neighbours surround each atom. Each cluster has a crystal-like structure. Between the clusters there are some free atoms and free electrons. The enthalpy of fusion is according to Richard's rule around the gas constant times the temperature of melting and the heat capacity in the liquid state is normally constant and for some metals lower than that in the solid state. For metals with low melting points it will decrease further with increasing temperature. This behaviour of the metals can be explained by the use of statistical mechanics and by assuming that the clusters, observed by X-ray analysis are rotating around a centre of its mass. The cluster model is applied to explain the diffusion rate in liquid metals. The effect of the experimental set upon measurements of diffusion constants is discussed as well as its effect on crystal growth.

  • 262.
    Fredriksson, Johan
    et al.
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID. Karolinska University Hospital, Sweden .
    Groth, Kristina
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID. Karolinska University Hospital, Sweden .
    Räsänen, Minna
    Bergius, Helena
    Rylander, Emma
    Effects of mobile video-mediated communication for health care professionals in advanced home care of children2014In: 2014 IEEE 27th International Symposium on Computer-Based Medical Systems (CBMS), IEEE , 2014, p. 363-368Conference paper (Refereed)
    Abstract [en]

    In this paper we explore the use of a mobile video-conferencing tool (MVCT) in advanced home care of children. We present the results from a qualitative study where we have evaluated mobile video communication between the patient's home and the hospital unit. Our results show that mobile video enhances communication between home care teams and medical staff at the unit, makes more effective use of practitioners' time and that the equipment have additional values for staff that extend beyond video communication. Challenges identified are related to technical problems, limitations in the MVCT's design and the concern that the inability to handle problems may affect health care professionals' role as an authority. The benefits of the MVCT rely to a great extent on individual users' creativity and the willingness of key actors in the organization's management to find ways of improving the present home care format.

  • 263.
    Frintrop, Simone
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    VOCUS: A visual attention system for object detection and goal-directed search2006In: Lecture Notes in Computer Science, ISSN 0302-9743, E-ISSN 1611-3349, p. 1-228Article in journal (Refereed)
    Abstract [en]

    Visual attention is a mechanism in human perception which selects relevant regions from a scene and provides these regions for higher-level processing as object recognition. This enables humans to act effectively in their environment despite the complexity of perceivable sensor data. Computational vision systems face the same problem as humans: there is a large amount of information to be processed and to achieve this efficiently, maybe even in real-time for robotic applications, the order in which a scene is investigated must be determined in an intelligent way. A promising approach is to use computational attention systems that simulate human visual attention. This monograph introduces the biologically motivated computational attention system VOCUS (Visual Object detection with a Computational attention System) that detects regions of interest in images. It operates in two modes, in an exploration mode in which no task is provided, and in a search mode with a specified target. In exploration mode, regions of interest are defined by strong contrasts (e.g., color or intensity contrasts) and by the uniqueness of a feature. For example, a black sheep is salient in a flock of white sheep. In search mode, the system uses previously learned information about a target object to bias the saliency computations with respect to the target. In various experiments, it is shown that the target is on average found with less than three fixations, that usually less than five training images suffice to learn the target information, and that the system is mostly robust with regard to viewpoint changes and illumination variances. Furthermore, we demonstrate how VOCUS profits from additional sensor data: we apply the system to depth and reflectance data from a 3D laser scanner and show the advantages that the laser modes provide. By fusing the data of both modes, we demonstrate how the system is able to consider distinct object properties and how the flexibility of the system increases by considering different data. Finally, the regions of interest provided by VOCUS serve as input to a classifier that recognizes the object in the detected region. We show how and in which cases the classification is sped up and how the detection quality is improved by the attentional front-end. This approach is especially useful if many object classes have to be considered, a frequently occurring situation in robotics. VOCUS provides a powerful approach to improve existing vision systems by concentrating computational resources to regions that are more likely to contain relevant information. The more the complexity and power of vision systems increase in the future, the more they will profit from an attentional front-end like VOCUS.

  • 264.
    Frintrop, Simone
    et al.
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Jensfelt, Patric
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Christensen, Henrik I.
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Attentional landmark selection for visual SLAM2006In: 2006 IEEE/RSJ International Conference on Intelligent Robots and Systems, Vols 1-12, NEW YORK: IEEE , 2006, p. 2582-2587Conference paper (Refereed)
    Abstract [en]

    In this paper, we introduce a new method to automatically detect useful landmarks for visual SLAM. A biologically motivated attention system detects regions of interest which "pop-out" automatically due to strong contrasts and the uniqueness of features. This property makes the regions easily redetectable and thus they are useful candidates for visual landmarks. Matching based on scene prediction and feature similarity allows not only short-term tracking of the regions, but also redetection in loop closing situations. The paper demonstrates how regions are determined and how they are matched reliably. Various experimental results on real-world data show that the landmarks are useful with respect to be tracked in consecutive frames and to enable closing loops.

  • 265.
    Frintrop, Simone
    et al.
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Jensfelt, Patric
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Christensen, Henrik I.
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Pay attention when selecting features2006In: 18th International Conference on Pattern Recognition, Vol 2, Proceedings / [ed] Tang, YY; Wang, SP; Lorette, G; Yeung, DS; Yan, H, 2006, p. 163-166Conference paper (Refereed)
    Abstract [en]

    In this paper we propose anew, hierarchical approach to landmark selection for simultaneous robot localization and mapping based on visual sensors: a biologically motivated attention system finds salient regions of interest (ROIs) in images, and within these regions, Harris corners are detected. This combines the advantages of the ROIs (reducing complexity, enabling good redetactability of regions) with the advantages of the Harris corners (high stability). Reducing complexity is important to meet real-time requirements and stability of features is essential to compute the depth of landmarks from structure from motion with a small baseline. We show that the number of landmarks is highly reduced compared to all Harris corners while maintaining the stability of features for the mapping task.

  • 266. Frise, Anton E.
    et al.
    Edri, Eran
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry (closed 20110630).
    Furo, Istvan
    Regev, Oren
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Physical Chemistry (closed 20110630).
    Protein Dispersant Binding on Nanotubes Studied by NMR Self-Diffusion and Cryo-TEM Techniques2010In: JOURNAL OF PHYSICAL CHEMISTRY LETTERS, ISSN 1948-7185, Vol. 1, no 9, p. 1414-1419Article in journal (Refereed)
    Abstract [en]

    Carbon nanotubes can be dispersed by a variety of molecules. We investigate the dynamics of protein-assisted carbon nanotube dispersion in water. We find that in equilibrium only a small fraction of the dispersants is indeed adsorbed to the nanotube Surface, while there is a fast exchange process between the adsorbed and free protein molecules. Self-diffusion NMR spectroscopy in combination with cryo-transmission electron microscopy imaging are employed.

  • 267.
    Fritz, Nicolas
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Akkuratov, Evgeny
    KTH.
    Liebmann, Thomas
    KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Lindskog, Maria
    Brismar, Hjalmar
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Aperia, Anita
    KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Functional consequences of the disease-causing T613M mutation of NKAalpha3 for hippocampal neurons2015In: The FASEB Journal, ISSN 0892-6638, E-ISSN 1530-6860, Vol. 29Article in journal (Other academic)
  • 268.
    Frölander, Anders
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Lutsenko, Serghey
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Privalov, Timofei
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Moberg, Christina
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Conformational preferences and enantiodiscrimination of phosphino-4-(1-hydroxyalkyl)oxazoline-metal-olefin complexes resulting from an OH-metal hydrogen bond2005In: Journal of Organic Chemistry, ISSN 0022-3263, E-ISSN 1520-6904, Vol. 70, no 24, p. 9882-9891Article in journal (Refereed)
    Abstract [en]

    Phosphinooxazolines carrying (1-hydroxy-1-phenyl)methyl and (1-methoxy-1-phenyl)methyl substituents in the 4 position of the oxazoline ring exhibit contrasting behavior in Pd-and Ir-catalyzed allylic alkylations. Whereas catalysts with the methoxy-containing ligand generally provide products with high ee's, use of catalysts prepared from the hydroxy-containing ligand results in products with low ee's or even racemates. DFT calculations suggest the presence of a hydrogen bond with Pd(0) as the proton acceptor in the hydroxy-containing olefin-Pd(0) complexes, which induces a conformational change in the ligand, leading to different stereoselectivity.

  • 269.
    Frölander, Anders
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Lutsenko, Serghey
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Privalov, Timofei
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Moberg, Christina
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    OH-Metal hydrogen bond in Pd- and Ir-catalyzed allylic alkylations2006In: ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2006, p. ORGN-259-Conference paper (Other academic)
    Abstract [en]

    Phosphinooxazolines carrying 4-hydroxybenzyl and 4-methoxybenzyl substituents exhibit contrasting behavior in Pd- and Ir-catalyzed allylic alkylations.  Whereas catalysts with the methoxy-contg. ligand generally provide products with high ee's, use of catalysts prepd. from the hydroxy contg. ligand results in products with low ee's or even racemates.  DFT calcns. suggest the presence of a hydrogen bond with Pd(0) as proton acceptor in the hydroxy contg. olefin Pd(0) complexes, which induces a conformational change in the ligand leading to different stereoselectivity.  We have previously obsd. the same kind of dramatic changes of enantioselectivities in palladium-catalyzed allylations upon methylation of hydroxy-contg. pyridinooxazolines and bisoxazolines.

  • 270.
    Fu, Hong-Yan
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Liu, Wei-Sheng
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Shao, Li-Yang
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Tunable flat-top fiber Bragg grating filters fabricated in hydrogen-loaded graded-index multimode fibers2007In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 49, no 4, p. 841-843Article in journal (Refereed)
    Abstract [en]

    We propose an experimental realization of flat-top filters by fabricating fiber Bragg gratings in graded-index multimode fibers (GI-MMF). Two types of GI-MMFs were used to make this kind of filters, and their spectra and polarization properties were experimentally investigated.

  • 271.
    Fu, Hongyan
    et al.
    KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Ou, Haiyan
    Zhu, Kun
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    He, Sailing
    KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.
    Tunable all-optical microwave notch filter with a negative tap based on a semiconductor optical amplifier and a dispersive medium2009In: Optics and Laser Technology, ISSN 0030-3992, E-ISSN 1879-2545, Vol. 41, no 3, p. 213-216Article in journal (Refereed)
    Abstract [en]

    A tunable all-optical microwave notch filter with a negative tap based on a semiconductor optical amplifier and a dispersive medium is demonstrated. A negative tap is realized through the cross gain modulation in the semiconductor optical amplifier. The free spectrum range of the notch filter can be tuned by tuning the wavelength of one of the two laser sources. The influence of the amplitude mismatch of the two lasers on the performance of the filter is analyzed. The present notch filter is easy to implement and cost-effective.

  • 272. Fujita, S.
    et al.
    Holmlund, P.
    Andersson, I.
    KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
    Brown, I.
    Enomoto, H.
    Fujii, Y.
    Fujita, K.
    Fukui, K.
    Furukawa, T.
    Hansson, M.
    Hara, K.
    Hoshina, Y.
    Igarashi, M.
    Iizuka, Y.
    Imura, S.
    Ingvander, S.
    Karlin, T.
    Motoyama, H.
    Nakazawa, F.
    Oerter, H.
    Sjöberg, Lars
    KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
    Sugiyama, S.
    Surdyk, S.
    Strom, J.
    Uemura, R.
    Wilhelms, F.
    Spatial and temporal variability of snow accumulation rate on the East Antarctic ice divide between Dome Fuji and EPICA DML2011In: The Cryosphere, ISSN 1994-0416, E-ISSN 1994-0424, Vol. 5, no 4, p. 1057-1081Article in journal (Refereed)
    Abstract [en]

    To better understand the spatio-temporal variability of the glaciological environment in Dronning Maud Land (DML), East Antarctica, a 2800-km-long Japanese-Swedish traverse was carried out. The route includes ice divides between two ice-coring sites at Dome Fuji and EPICA DML. We determined the surface mass balance (SMB) averaged over various time scales in the late Holocene based on studies of snow pits and firn cores, in addition to radar data. We find that the large-scale distribution of the SMB depends on the surface elevation and continentality, and that the SMB differs between the windward and leeward sides of ice divides for strong-wind events. We suggest that the SMB is highly influenced by interactions between the large-scale surface topography of ice divides and the wind field of strong-wind events that are often associated with high-precipitation events. Local variations in the SMB are governed by the local surface topography, which is influenced by the bedrock topography. In the eastern part of DML, the accumulation rate in the second half of the 20th century is found to be higher by similar to 15% than averages over longer periods of 722 a or 7.9 ka before AD 2008. A similar increasing trend has been reported for many inland plateau sites in Antarctica with the exception of several sites on the leeward side of the ice divides.

  • 273.
    Furberg, Richard
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Khodabandeh, Rahmatollah
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Palm, Björn E.
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Li, Shanghua
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Toprak, Muhammet
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Muhammed, Mamoun
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Experimental investigation of an evaporator enhanced with a micro-porous structure in a two-phase thermosyphon loop2009In: HT2008: PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE - 2008, VOL 2, NEW YORK: AMER SOC MECHANICAL ENGINEERS , 2009, p. 327-334Conference paper (Refereed)
    Abstract [en]

    Following is an experimental study of six different evaporators in a closed two-phase thermosyphon loop system, where the influence of various evaporator dimensions and surfaces was investigated. The evaporators featured a 30 mm long rectangular channel with hydraulic diameters ranging from 1.2-2.7 mm. The heat transfer surface of one of the tested evaporators was enhanced with copper nano-particles, dendritically connected into an ordered micro-porous three dimensional network structure. To facilitate high speed video visualization of the two-phase flow in the evaporator channel, a transparent polycarbonate window was attached to the front of the evaporators. Refrigerant 134A was used as a working fluid and the tests were conducted at 6.5 bar. The tests showed that increasing channel diameters generally performed better. The three largest evaporator channels exhibited comparable performance, with a maximum heat transfer coefficient of about 2.2 W/(cm(2)K) at a heat flux of 30-35 W/cm(2) and a critical heat flux of around 50 W/cm(2). Isolated bubbles characterized the flow regime at peak performance for the large diameter channels, while confined bubbles and chaotic churn flow typified the evaporators with small diameters. In line with previous pool boiling experiments, the nucleate boiling mechanism was significantly enhanced, tip to 4 times, by the nano- and micro-porous enhancement structure.

  • 274.
    Furdek, Marija
    et al.
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
    Muhammad, Ajmal
    KTH, School of Information and Communication Technology (ICT).
    Zervas, Georgios
    Tremblay, Christine
    Wosinska, Lena
    KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
    Performance Evaluation of Programmable Filterless Networks Implemented by Optical White Boxes2016In: 2016 18TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON), IEEE, 2016Conference paper (Refereed)
    Abstract [en]

    To support the immense traffic growth and enable scalable on-demand provisioning of service requests, optical networks must deliver great agility and reconfigurability in a cost-and resource-efficient manner. The progress in elastic coherent transmission [1] has enabled simplifications in the optical network architecture by, for example, replacing the costly wavelength switches in the add/drop part of colorless reconfigurable add/drop multiplexers (ROADMs) with passive couplers. The concept of passive filterless networking further proposes the elimination of wavelength switching in the transport function as well. It is based on completely passive interconnections realized by passive splitters and combiners, essentially forming fiber trees spanning the network nodes [2]. In such networks, transmission follows the Drop&Waste ( or Drop&Continue) scheme where each signal is broadcasted to all branches downstream of the source node in a tree, while a copy of signal continues to propagate downstream of the destination node [3]. Thus, the simplification of the nodal architecture comes at the expense of increased spectrum usage due to the presence of unfiltered signals. Moreover, the broadcasting of signals to inadvertent nodes raises confidentiality issues. An additional drawback stems from the inability of the passive, fixed interconnection of nodes to allow for topology reconfiguration. The optical white boxes, or programmable optical switches (also referred to as architecture-on-demand) can provide unparalleled switching and architectural flexibility [4]. Unlike in conventional ROADMs, optical modules (e.g., passive couplers, amplifiers or WSSs) inside an optical white box are not interconnected in a hard-wired manner, but are selected on demand by a reconfigurable optical backplane (OB), implemented by, e.g., a piezoelectric switch or 3D MEMs. An arbitrary nodal architecture can be configured by setting up the interconnections of the OB as per traffic requirements, and swiftly reconfigured to accommodate changing traffic demands, scale capacity, and ease migration and upgrade. Combining the agile filterless transmission with flexible optical white boxes into a programmable filterless network architecture, recently proposed in [5], integrates the agility of filterless operation with the high flexibility enabled by white boxes. The nodes in a programmable filterless network are equipped with a programmable OB hosting only passive couplers to route the connections. The preliminary study of routing, modulation format and spectrum assignment (RMSA) in programmable filterless networks aimed at spectrum usage minimization [5] shows that they are capable of reducing the amount of unfiltered signals compared to passive filterless networks and can significantly decrease spectrum usage. Due to the moderately-sized switches deployed for the OB, this architecture also offers the potential of diminishing the nodal costs compared to the conventional ROADM-based networks. In addition, when striving to minimize the spectrum usage, connections tend to get routed over fewer splitters as they are the cause of broadcasted, unfiltered signals. This may lead to a decrease in the total number and degree of passive couplers traversed by connections, which can reduce the signal losses and lower the amplification requirements. This talk will outline the operational principles of programmable filterless network architecture and their benefits in terms of spectrum and component usage. We will also present possible technological and optimization approaches to further enhance the performance of white box based filterless networks and the related preliminary results.

  • 275.
    Gaidashev, Denis
    et al.
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.).
    Khmelev, Dmitry
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.).
    On numerical algorithms for the solution of a Beltrami equation2008In: SIAM Journal on Numerical Analysis, ISSN 0036-1429, E-ISSN 1095-7170, Vol. 46, no 5, p. 2238-2253Article in journal (Refereed)
    Abstract [en]

    The paper concerns numerical algorithms for solving the Beltrami equation f (z) over bar (z) = mu( z) fz( z) for a compactly supported mu. First, we study an e. cient algorithm that has been proposed in [ P. Daripa, J. Comput. Phys., 106 ( 1993), pp. 355 - 365] and [ P. Daripa and D. Mashat, Numer. Algorithms, 18 ( 1998), pp. 133 - 157] and present its rigorous justi. cation. We then propose a different scheme for solving the Beltrami equation which has a comparable speed and accuracy, but has the virtue of easier implementation by avoiding the use of the Hilbert transform. The present paper can also be viewed as a prologue to one important application of the Beltrami equation: it provides a detailed description of the algorithm that has been used in [ D. Gaidashev, Nonlinearity, 20 ( 1998), pp. 713 - 741] and [ D. Gaidashev and M. Yampolsky, Experiment. Math., 16 ( 2007), pp. 215 - 226] to address an important issue in complex dynamics - conjectural universality for Siegel disks.

  • 276.
    Gallo, Katia
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Quantum Electronics and Quantum Optics, QEO.
    Levenius, Martin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Quantum Electronics and Quantum Optics, QEO.
    Vermersch, Benoit
    KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.
    Pasiskevicius, Valdas
    KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.
    Laurell, Fredrik
    KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.
    Parametric frequency Downconversion devices in periodically poled Mg-doped stoichiometric Lithium Tantalate2011In: 2010 12th International Conference on Transparent Optical Networks, ICTON 2010, 2011Conference paper (Other academic)
    Abstract [en]

    This paper provides an overview of our work on nonlinear optical devices in MgO-doped nearly stoichiometric LiTaO3. We present experimental results for optical parametric oscillation and broadband generation obtained with one- and two- dimensional periodically poled structures.

  • 277.
    Gao, Shiming
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Yang, Changxi
    Two channels of entangled twin photons generated by quasi-phase-matched spontaneous parametric down-conversion in periodically poled lithium niobate crystals2008In: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, E-ISSN 1520-8540, Vol. 25, no 5, p. 734-740Article in journal (Refereed)
    Abstract [en]

    We propose the generation of two-channel time-energy entangled twin photons based on two simultaneous first-order quasi-phase-matched (QPM) spontaneous parametric down-conversion processes in a periodically poled lithium niobate (PPLN) with a monochromatic pump. The theoretical model for the generation of the entangled photons is established, and the analytical solution is obtained in a lossless crystal with an undepleted pump assumption. The generated condition of entangled photons is achieved in terms of the QPM grating period and the pump wavelength. It is shown that two channels of entangled twin photons with different wavelengths can be created by suitably choosing the PPLN grating period once the pump wavelength is fixed, which provides the potential to introduce the wavelength division multiplexed technique into quantum information systems.

  • 278.
    Gao, Shiming
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Yang, Changxi
    Chen, Daru
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Qin, Shan
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Gao, Ying
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Bandwidth enhancement methods of telecom-region entangled twin photons via quasi-phase-matched spontaneous parametric down-conversion2006In: Journal of nonlinear optical physics and materials, ISSN 0218-8635, Vol. 15, no 4, p. 513-521Article in journal (Refereed)
    Abstract [en]

    We theoretically present the bandwidth enhancement methods of the telecom-region entangled twin photons generated by quasi-phase-matched (QPM) spontaneous parametric down-conversion (SPDC) in periodically poled lithium niobate (PPLN) crystals. By using type I (e --> e + e) SPDC, the degenerate entangled twin photons will have a broad bandwidth and it can be further enhanced by shortening the crystal length, detuning the pump wavelength or adjusting the working temperature of the PPLN crystal. This principle provides the possibility to introduce wavelength-division-multiplexed technique into quantum information systems.

  • 279.
    Gao, Ying
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Gao, Shiming
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Ou, Haiyan
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    ALL-OPTICAL FREQUENCY CONVERTER BASED ON FIBER FOUR-WAVE MIXING FOR BIDIRECTIONAL RADIO-OVER-FIBER SYSTEMS2009In: Microwave and optical technology letters (Print), ISSN 0895-2477, E-ISSN 1098-2760, Vol. 51, no 6, p. 1542-1545Article in journal (Refereed)
    Abstract [en]

    A frequency up/down-converter is proposed based on fiber-four-wave-mixing (FWM) between the output of a dual-wavelength fiber laser and the modulated optical carrier for bidirection radio-over-fiber (RoF) systems. Frequency, up-conversion from 1.50 to 11.08 GHz and down-conversion from 10.60 to 1.02 GHz are successfully demonstrated and a small efficiency difference between up- and down-conversions has been achieved. A proposal of setting up a bidirectional RoF system based on fiber FWM frequency converter is presented.

  • 280. Garrity, N. J.
    et al.
    Battalio, R.
    Hawkes, Peter J.
    KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering (moved 20130630).
    Roupe, D.
    Evaluation of event and response approaches to estimate the 100-year coastal flood for pacific coast sheltered waters2007In: Coastal Engineering 2006: Proceedings of the 30th International Conference, 2007, p. 1651-1663Conference paper (Refereed)
    Abstract [en]

    Coastal flooding on the Pacific Coast of the United States typically results from the joint occurrence of relatively high water levels and large waves, which are partially correlated. This paper evaluates three approaches to address the joint probability of water levels and waves (flood forcing events) in estimating coastal flood levels (responses) with a 100-year return period. The event approach involves selecting extreme events that are expected to force a response that approximates or exceeds the 100-year flood response. The two response approaches determine the response probability from a calculated response data set. The approaches were applied to a sheltered waters site to inform the development and implementation of the United States Federal Emergency Management Agency's guidelines for mapping coastal flood hazards on the Pacific Coast. Both event and response approaches can provide adequate results, but each requires varying levels of judgment and has advantages and disadvantages. A hybrid between event and response approaches is identified as a balance of accuracy and efficiency in coastal flood studies.

  • 281.
    Gatto, L.
    et al.
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.). Politecnico di Torino, Italy.
    Laksov, Dan
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.). Politecnico di Torino, Italy.
    From linear recurrence relations to linear ODEs with constant coefficients2016In: Journal of Algebra and its Applications, ISSN 0219-4988, E-ISSN 1793-6829, Vol. 15, no 6, article id 1650109Article in journal (Refereed)
    Abstract [en]

    Linear Ordinary Differential Equations (ODEs) with constant coefficients are studied by looking in general at linear recurrence relations in a module with coefficients in an arbitrary ℤalgebra. The bridge relating the two theories is the notion of formal Laplace transform associated to a sequence of invertibles. From this more economical perspective, generalized Wronskians associated to solutions of linear ODEs will be revisited, mentioning their relationships with Schubert Calculus for Grassmannians.

  • 282. Gebauer, Denis
    et al.
    Oliynyk, Vitaliy
    Salajkova, Michaela
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Biocomposites. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Sort, Jordi
    KTH, School of Biotechnology (BIO), Glycoscience.
    Zhou, Qi
    KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    Bergstrom, Lennart
    Salazar-Alvarez, German
    KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
    A transparent hybrid of nanocrystalline cellulose and amorphous calcium carbonate nanoparticles2011In: NANOSCALE, ISSN 2040-3364, Vol. 3, no 9, p. 3563-3566Article in journal (Refereed)
    Abstract [en]

    Nanocellulose hybrids are promising candidates for biodegradable multifunctional materials. Hybrids of nanocrystalline cellulose (NCC) and amorphous calcium carbonate (ACC) nanoparticles were obtained through a facile chemical approach over a wide range of compositions. Controlling the interactions between NCC and ACC results in hard, transparent structures with tunable composition, homogeneity and anisotropy.

  • 283.
    Gerami, Majid
    et al.
    KTH, School of Electrical Engineering (EES), Communication Theory.
    Xiao, Ming
    KTH, School of Electrical Engineering (EES), Communication Theory.
    Li, Jun
    KTH, School of Electrical Engineering (EES).
    Fischione, Carlo
    KTH, School of Electrical Engineering (EES), Automatic Control.
    Lin, Z.
    Repair for distributed storage systems with packet erasure channels and dedicated nodes for repair2016In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 64, no 4, p. 1367-1383, article id 7422022Article in journal (Refereed)
    Abstract [en]

    We study the repair problem in distributed storage systems where storage nodes are connected through packet erasure channels and some nodes are dedicated to repair [termed as dedicated-for-repair (DR) storage nodes]. We first investigate the minimum required repair-bandwidth in an asymptotic setup, in which the stored file is assumed to have an infinite size. The result shows that the asymptotic repair-bandwidth over packet erasure channels with a fixed erasure probability has a closed-form relation to the repair-bandwidth in lossless networks. Next, we show the benefits of DR storage nodes in reducing the repair bandwidth, and then we derive the necessary minimal storage space of DR storage nodes. Finally, we study the repair in a nonasymptotic setup, where the stored file size is finite. We study the minimum practical-repair-bandwidth, i.e., the repair-bandwidth for achieving a given probability of successful repair. A combinatorial optimization problem is formulated to provide the optimal practical-repair-bandwidth for a given packet erasure probability. We show the gain of our proposed approaches in reducing the repair-bandwidth.

  • 284.
    Geronimo, David
    et al.
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Kjellström, Hedvig
    KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP.
    Unsupervised surveillance video retrieval based on human action and appearance2014In: Proceedings - International Conference on Pattern Recognition, LOS ALAMITOS: IEEE Computer Society, 2014, p. 4630-4635Conference paper (Refereed)
    Abstract [en]

    Forensic video analysis is the offline analysis of video aimed at understanding what happened in a scene in the past. Two of its key tasks are the recognition of specific actions, e.g., walking or fighting, and the search for specific persons, also referred to as re-identification. Although these tasks have traditionally been performed manually in forensic investigations, the current growing number of cameras and recorded video leads to the need for automated analysis. In this paper we propose an unsupervised retrieval system for surveillance videos based on human action and appearance. Given a query window, the system retrieves people performing the same action as the one in the query, the same person performing any action, or the same person performing the same action. We use an adaptive search algorithm that focuses the analysis on relevant frames based on the inter-frame difference of foreground masks. Then, for each analyzed frame, a pedestrian detector is used to extract windows containing each pedestrian in the scene. For each detection, we use optical flow features to represent its action and color features to represent its appearance. These extracted features are used to compute the probability that the detection matches the query according to the specified criterion. The algorithm is fully unsupervised, i.e., no training or constraints on the appearance, actions or number of actions that will appear in the test video are made. The proposed algorithm is tested on a surveillance video with different people performing different actions, providing satisfactory retrieval performance.

  • 285. Geurs, Karst
    et al.
    Zondag, Barry
    de Jong, Gerard
    KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Transport Studies, CTS.
    de Bok, Michiel
    Accessibility appraisal of land-use/transport policy strategies: More than just adding up travel-time savings2010In: Transportation Research Part D: Transport and Environment, ISSN 1361-9209, E-ISSN 1879-2340, Vol. 15, no 7, p. 382-393Article in journal (Refereed)
    Abstract [en]

    We examine the accessibility benefits associated with some land-use policy strategies for the Netherlands that anticipate on expected climate change. A disaggregate logsum accessibility measure using the Dutch national land-use/transport interaction model TIGRIS XL is used to compute changes in consumer surplus. The measure provides an elegant and convenient solution to measure the full accessibility benefits from land-use and/or transport policies, when discrete choice travel-demand models are available that already produce logsums. It accounts for both changes in generalised transport costs and changes in destination utility, and is thus capable of providing the accessibility benefits from changes in the distribution of activities, due to transport or land-use policies. The case study shows that logsum accessibility benefits from land-use policy strategies can be quite large compared to investment programmes for road and public transport infrastructure, largely due to changes in trip production and destination utility, which are not measured in the standard rule-of-half benefit measure.

  • 286. Gharibi, Arash
    et al.
    Shen, Jian Qi
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Gu, Jing
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Tunable transient evolutional behaviours of a four-level atomic vapour and the application to photonic logic gates2009In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 42, no 5, p. 055502-Article in journal (Refereed)
    Abstract [en]

    The evolutional optical behaviours (turn-on dynamics) of a four-level N-configuration atomic system are considered based on the transient solution to the equations of motion of atomic probability amplitudes. It is shown that the quantum interference between the signal and control fields can lead to the controllable absorption and transparency properties of the atomic vapour. One of the most remarkable properties of the present scheme is that the absorption (or transmittance) of the probe light in the atomic vapour depends on the intensity ratio of the signal field to the control field, and thus the tunable optical features (transparency or opaqueness to the probe light) can be realized by tuning the quantum interferences between the signal and control fields. The present mechanism can be applicable to designs of some new photonic and quantum optical devices such as logic and functional devices as well as optical switches. Two typical photonic logic gates (NOT and NOR gates) designed based on the tunable four-level optical responses are presented as illustrative examples.

  • 287. Ghosh, Arun
    et al.
    Krishnan, T. Rakesh
    KTH, School of Computer Science and Communication (CSC).
    Tejaswy, Pailla
    Mandal, Abhisek
    Pradhan, Jatin K.
    Ranasingh, Subhakant
    Design and implementation of a 2-DOF PID compensation for magnetic levitation systems2014In: ISA transactions, ISSN 0019-0578, E-ISSN 1879-2022, Vol. 53, no 4, p. 1216-1222Article in journal (Refereed)
    Abstract [en]

    This paper employs a 2-DOF (degree of freedom) PID controller for compensating a physical magnetic levitation system. It is shown that because of having a feedforward gain in the proposed 2-DOF PID control, the transient performance of the compensated system can be changed in a desired manner unlike the conventional 1-DOF PID control. It is also shown that for a choice of PID parameters, although the theoretical loop robustness is the same for both the compensated systems, in real-time, 2-DOF PID control may provide superior robustness if a suitable choice of the feedforward parameter is made. The results are verified through simulations and experiments.

  • 288.
    Gode, Peter
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.
    Hult, Anders
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Jannasch, Patric
    Polymer Science and Engineering, Lund University.
    Johansson, M.
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Karlsson, Lina E.
    Polymer Science and Engineering, Lund University.
    Lindbergh, Göran
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.
    Malmström, Eva
    KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
    Sandquist, D.
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.
    A novel sulfonated dendritic polymer as the acidic component in proton conducting membranes2006In: Solid State Ionics, ISSN 0167-2738, E-ISSN 1872-7689, Vol. 177, no 7-8, p. 787-794Article in journal (Refereed)
    Abstract [en]

    The present study involves the synthesis of sulfonated poly(3-ethyl-3-(hydroxymethyl)oxetane), sPTMPO, by end-capping the hydroxy-groups in the PTMPO with 1,4-butane sultone. A series of the polymer with different degrees of substitution was investigated. Furthermore, the subsequent use of the sulfonated PTMPO as the acidic component in proton conducting membranes was explored. The membranes were prepared by either a) mixing the partly sulfonated PTMPO with hexamethoxymethyl melamine (HMMM) to form cross-links by ether formation between the methylol groups on HMMM and the remaining hydroxyl groups on the hyperbranched polyether or b) using the sulfonated polyether in conjunction with a pyridine functionalised polysulfone, PSU-pyridine, to produce acid-base blend membranes. Membrane properties such as proton conductivity, water uptake and mechanical properties are discussed.

  • 289.
    Gong, ZuYong
    et al.
    KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology. University of Science and Technology of China, China.
    Duan, Sai
    KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.
    Tian, Guangjun
    KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.
    Jiang, Jun
    Xu, Xin
    Luo, Yi
    KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology. University of Science and Technology of China, China.
    Infrared spectra of small anionic water clusters from density functional theory and wavefunction theory calculations2015In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 17, no 19, p. 12698-12707Article in journal (Refereed)
    Abstract [en]

    We performed systematic theoretical studies on small anionic water/deuterated water clusters W/D-n=2-6(-) at both density functional theory (B3LYP) and wavefunction theory (MP2) levels. The focus of the study is to examine the convergence of calculated infrared (IR) spectra with respect to the increasing number of diffuse functions. It is found that at the MP2 level for larger clusters (n = 4-6), only one extra diffuse function is needed to obtain the converged relative IR intensities, while two or three more sets of extra diffuse functions are needed for smaller clusters. Such behaviour is strongly associated with the convergence of the electronic structure of corresponding clusters at the MP2 level. It is striking to observe that at the B3LYP level, the calculated relative IR intensities for all the clusters under investigations are diverse and show no trend of convergence upon increasing the number of diffuse functions. Moreover, the increasing contribution from the extra diffuse functions to the dynamic IR dipole moment indicates that the B3LYP electronic structure also fails to converge. These results manifest that MP2 is a preferential theoretical method, as compared to the widely used B3LYP, for the IR intensity of dipole bounded electron systems.

  • 290.
    Gonzalez, Delia Rodriguez De Liera
    et al.
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    Ismail, Mohammed
    KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
    A programmable baseband chain for a WCDMA/WLAN(802.11b)multi-standard zero-IF receiver2005In: VLSI Circuits and Systems II, Pts 1 and 2 / [ed] Lopez, JF; Fernandez, FV; LopezVillegas, JM; DelaRosa, JM, BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING , 2005, Vol. 5837, p. 396-403Conference paper (Refereed)
    Abstract [en]

    As we move towards convergent 4G Wireless encompassing both 3G cellular (WCDMA) for wide area networks and Wireless LAN for "hot-spots", the development of low power, low cost multi-band multi-standard wireless chipset solutions is a must. To this end this paper presents a programmable architecture for an analog baseband chain intended for use in a zero-IF multi-standard WCDMA/WLAN(802.11b) radio receiver. It also addresses the DC offset cancellation in the baseband chain. This is one of the major impairments in zero-IF receivers whose simplicity makes them suitable for single-chip multi-standard designs but where DC offset can reduce the receiver performance if a proper DC offset cancellation scheme is not devised. System level design of the baseband chain is given leading to design specifications of the different blocks in the chain. Extensive simulations carried out in MATLAB/SimuLink at the system level and in Cadence design tools at the circuit level show the performance of the system. The circuits will be fabricated in a 0.18 mu m CMOS process for a 1.8 V power supply.

  • 291.
    Gonzalez, Jose Luis
    et al.
    KTH, School of Electrical Engineering (EES), Electric Power Systems.
    Dimoulkas, Ilias
    KTH, School of Electrical Engineering (EES), Electric Power Systems.
    Amelin, Mikael
    KTH, School of Electrical Engineering (EES), Electric Power Systems.
    Operation Planning of a CSP Plant in the Spanish Day-ahead Electricity Market2014Conference paper (Refereed)
    Abstract [en]

    This paper addresses the short-term operation planning of a concentrated solar power (CSP) plant equipped with a backup fuel boiler and operating in the Spanish day-ahead electricity market. The problem is formulated as a mixed-integer linear programming model. Forecasted values of electricity prices and direct sun irradiation are considered. The main concern in the problem is to set an optimal use of the backup system in order to increase power generation and maximize the profits. Interaction between the solar and fuel heated systems is considered through heat balance constraints while parameters referring to the boiler are independent from the rest of the system allowing various types of boilers to be tested. A realistic case study provides results of a CSP plant operating a) without boiler, b) with a natural gas boiler and c) with a biomass boiler. Results demonstrate the advantages of the proposed model.

  • 292.
    Gorlov, Mikhail
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Lindborg, Anders
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Karlsson, Martin
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Tian, Haining
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Sun, Licheng
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Optimization of dye-sensitized solar cells based on organic dyes2010In: ACS National Meeting Book of Abstracts, 2010Conference paper (Refereed)
    Abstract [en]

    Dye-sensitized solar cells (DSSCs) were discovered by O'Reagan and Grätzel in 1991. Lots of research has been done since then, trying to improve the cell efficiency in generating electrical power from sunlight. The most efficient DSSCs used today are based on ruthenium(II) bipyridyle complexes as sensitizers, combined with an electrolyte consisting of iodide/triiodide redox couple in an organic solvent. Volatility of the organic solvents limits industrial application of DSSCs, and relatively high price for ruthenium metal make it expensive to produce DSSCs using these materials on an industrial scale. Therefore, the less expensive organic dyes and non-volatile solvents like ionic liquids (ILs) are favorable to use. In this work, we present a study of two organic dyes (D9L6 and TH208 shown in Figure 1, left and right, respectively) and their behavior with deferent electrolytes in DSSCs.

  • 293.
    Granlund, Moa Z.
    et al.
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
    Zacherl, Sabina
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
    Pettersson, Lars J.
    KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology. Univ Stellenbosch, South Africa.
    Comparison between ceria-zirconia and alumina as supports for oxidative steam reforming of biodiesel2015In: Topics in catalysis, ISSN 1022-5528, E-ISSN 1572-9028, Vol. 58, no 14-17, p. 933-938Article in journal (Other academic)
    Abstract [en]

    The objective of the study is to illustrate the advantages with using ceria–zirconia instead of promoted alumina as support for rhodium-based catalysts in oxidative steam reforming of biodiesel. The evaluation is based on long-term oxidative steam reforming experiments where the stability and durability of the catalysts are evaluated. The durability and fuel conversion of the two catalysts were comparable. However, the H2 yield of the ceria–zirconia supported catalyst was 10 % higher than for the catalyst supported on promoted alumina after 65 h on stream. Included are also measurements of the acidity of the catalysts, where it was concluded that the promoted alumina catalyst was significantly more acidic. The acidity of the materials could then be related to the amount of coke deposited, where the amount of coke on the alumina catalyst was almost five times higher after 50 h of operation compared to the ceria–zirconia catalyst.

  • 294. Gregoretti, I. V.
    et al.
    Lee, Yun M.
    KTH, Superseded Departments, Biotechnology. Walther Cancer Center, Dept. of Chemistry and Biochemistry, University of Notre Dame, USA.
    Goodson, H. V.
    Molecular evolution of the histone deacetylase family: Functional implications of phylogenetic analysis2004In: Journal of Molecular Biology, ISSN 0022-2836, E-ISSN 1089-8638, Vol. 338, no 1, p. 17-31Article in journal (Refereed)
    Abstract [en]

    Histone deacetylases (HDACs) modify core histones and participate in large regulatory complexes that both suppress and enhance transcription. Recent studies indicate that some HDACs can act on non-histone proteins as well. Interest in these enzymes is growing because HDAC inhibitors appear to be promising therapeutic agents against cancer and a variety of other diseases. Thus far, 11 members of the HDAC family have been identified in humans, but few have been characterized in detail. To better define the biological function of these proteins, make maximal use of studies performed in other systems, and assist in drug development efforts, we have performed a phylogenetic analysis of all HDAC-related proteins in all fully sequenced free-living organisms. Previous analyses have divided non-sirtuin HDACs into two groups, classes 1 and 2. We find that HDACs can be divided into three equally distinct groups: class 1, class 2, and a third class consisting of proteins related to the recently identified human HDAC11 gene. We term this novel group "class 4" to distinguish it from the unrelated "class 3" sirtuin deacetylases. Analysis of gene duplication events indicates that the common ancestor of metazoan organisms contained two class 1, two class 2, and a single class 4 HDAC. Examination of HDAC characteristics in light of these evolutionary relationships leads to functional predictions, among them that self-association is common among HDAC proteins. All three HDAC classes (including class 4) exist in eubacteria. Phylogenetic analysis of bacterial HDAC relatives suggests that all three HDAC classes precede the evolution of histone proteins and raises the possibility that the primary activity of some "histone deacetylase" enzymes is directed against non-histone substrates.

  • 295.
    Gråsjö, Urban
    KTH, School of Industrial Engineering and Management (ITM), Centres, Centre of Excellence for Science and Innovation Studies, CESIS.
    Spatial econometrics: Methods and applications2011In: Papers in regional science (Print), ISSN 1056-8190, E-ISSN 1435-5957, Vol. 90, no 4, p. 886-888Article, book review (Other academic)
  • 296.
    Gröndahl, Fredrik
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Sidenmark, J.
    Thomsen, Ann
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Survey of waste water disposal practices at Antarctic research stations2009In: Polar Research, ISSN 0800-0395, E-ISSN 1751-8369, Vol. 28, no 2, p. 298-306Article in journal (Refereed)
    Abstract [en]

    To inform the future practices to be employed for handling waste water and grey water at the Swedish Antarctic station, Wasa, in Dronning Maud Land, the Swedish Polar Research Secretariat took the initiative to survey the practices of the 28 nations with stations in Antarctica. A questionnaire was sent out to all members of the Antarctic Environment Officers Network during the autumn of 2005. Questions were asked about the handling of waste water and grey water, the type of sewage treatment, and installation and operational costs. The response to the questionnaire was very good (79%), and the results showed that 37% of the permanent stations and 69% of the summer stations lack any form of treatment facility. When waste water and grey water containing microorganisms are released, these microorganisms can remain viable in low-temperature Antarctic conditions for prolonged periods. Microorganisms may also have the potential to infect and cause disease, or become part of the gut flora of local bird and mammal populations, and fish and marine invertebrates. The results from 71 stations show that much can still be done by the 28 nations operating the 82 research stations in Antarctica. The technology exists for effective waste water treatment in the challenging Antarctic conditions. The use of efficient technology at all permanent Antarctic research stations would greatly reduce the human impact on the pristine Antarctic environment. In order to protect the Antarctic environment from infectious agents introduced by humans, consideration should also be given to preventing the release of untreated waste water and grey water from the smaller summer stations.

  • 297.
    Guan, Zu-Guang
    et al.
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Zhou, Bin
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Liu, Guorong
    KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    He, Sailing
    KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. KTH, School of Information and Communication Technology (ICT), Centres, Zhejiang-KTH Joint Research Center of Photonics, JORCEP.
    Coherence multiplexing of absorption sensors2007In: IEEE SENSOR, 2007, p. 566-569Conference paper (Refereed)
    Abstract [en]

    The coherence multiplexing of absorption sensors is realized based on a path-scanning Michelson interferometer (MI). The sensing units are designed with different optical path lengths, and the signals from the inline sensing array can be demultiplexed by a path-scanning MI. Intra-cavity absorbance in each unit can be deduced from the corresponding signal and the signals of the previous sensing units.

  • 298.
    Gudmundsson, Kjartan
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Sjöström, Christer
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Norberg, Peter
    Wolfram, Trinius
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Twumasi, Ebenezer
    Durable and robust vacuum insulation technology for buildings2011Conference paper (Refereed)
  • 299.
    Gulbinskas, S
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Mileriene, Rosita
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Blažauskas, N
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Environmental Monitoring System for Beach and Nearshore Nourishment: Lithuanian case study (abstract)2008In: A Changing Coast: challenge for the environmental policies - the 9th international conference, 2008Conference paper (Other academic)
  • 300.
    Guldevall, Karolin
    et al.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Brandt, Ludwig
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Forslund, Elin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab. Karolinska Inst, Dept Microbiol Tumor & Cell Biol, Sweden.
    Olofsson, Karl
    Frisk, Thomas W.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Olofsson, Per E.
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Gustafsson, Karin
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Manneberg, Otto
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Vanherberghen, Bruno
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Brismar, Hjalmar
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Karre, Klas
    Uhlin, Michael
    Önfelt, Björn
    KTH, School of Engineering Sciences (SCI), Applied Physics, Cell Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
    Microchip screening Platform for single cell assessment of NK cell cytotoxicity2016In: Frontiers in Immunology, ISSN 1664-3224, E-ISSN 1664-3224, Vol. 7, article id 119Article in journal (Refereed)
    Abstract [en]

    Here, we report a screening platform for assessment of the cytotoxic potential of individual natural killer (NK) cells within larger populations. Human primary NK cells were distributed across a silicon-glass microchip containing 32,400 individual microwells loaded with target cells. Through fluorescence screening and automated image analysis, the numbers of NK and live or dead target cells in each well could be assessed at different time points after initial mixing. Cytotoxicity was also studied by time-lapse live-cell imaging in microwells quantifying the killing potential of individual NK cells. Although most resting NK cells (approximate to 75%) were non-cytotoxic against the leukemia cell line K562, some NK cells were able to kill several (>= 3) target cells within the 12-h long experiment. In addition, the screening approach was adapted to increase the chance to find and evaluate serial killing NK cells. Even if the cytotoxic potential varied between donors, it was evident that a small fraction of highly cytotoxic NK cells were responsible for a substantial portion of the killing. We demonstrate multiple assays where our platform can be used to enumerate and characterize cytotoxic cells, such as NK or T cells. This approach could find use in clinical applications, e.g., in the selection of donors for stem cell transplantation or generation of highly specific and cytotoxic cells for adoptive immunotherapy.

3456789 251 - 300 of 915
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf