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  • 1.
    Berglund, Maritna
    KTH, Superseded Departments, KTH Syd.
    Schedulers’ work activities and decision making influencing working conditions of other employees2002In: In Proceedings of the 34th Annual Congress of the Nordic Ergonomics Society, 1-3 October, Kolmården, Sweden, 2002Conference paper (Refereed)
  • 2.
    Berglund, Martina
    et al.
    KTH, Superseded Departments, KTH Syd.
    Karltun, Johan
    Högskolan i Jönköping, JTH .
    Schedulers reality expectations and dependencies2001In: In Proceedings of the 16th International Conference on Production Research, July 29-August 3, Prague, Czech Republic, 2001Conference paper (Refereed)
  • 3. Carlsson, Camilla
    et al.
    Söderqvist, Emil
    KTH, Superseded Departments, KTH Syd.
    Brodin, Lars-Åke
    Källner, Göran
    Hultman, Jan
    Elmqvist, Håkan
    Saha, Samir
    Initial experience with a thin single segment pressure and conductance catheter for measurement of left ventricular volume2001In: Annual Reports of the Research Reactor Institute, Kyoto University, 2001, p. 103-106Conference paper (Refereed)
    Abstract [en]

    Aims: To evaluate a thin and soft multifunctionalcatheter for the simultaneous real time monitoring of leftventricular volume and pressure with special consideration toside elTects such as interference with normal cardiacelectrophysiology.Methods and results: In four pigs, pressure and volumewere simultaneously recorded by using the thin single segmentpressure and conductance catheter. Measurements were doneunder varied cardiac conditions: at baseline, during preloadreduction and afterload Increase. Volumes were calibrated withintracardiac ultrasound measurements. During preloadreduction the pressure and volume decreased as expected. Acautious afterload increase resulted in a corresponding pressureand volume increase, the maximum of the pressure curvechanged from early to late. Both SV and EDV increased. Thevery few arrhythmias were mainly caused by surgicalinterference.Conclusion: The present study demonstrates that our thinsingle segment conductance catheter for the simultaneousmeasurement of LV volume and pressure has a performancethat warrants further development with the goal to make themethod available for human use. In particular, the catheter didnot cause any arrhythmias.

  • 4.
    Einberg, Gery
    KTH, Superseded Departments, KTH Syd.
    Multi-Zone Model Approach for Evaluating Particle Mass Transport in a Ventilated Room2004In: RoomVent 2004: 9th International Conference on Air Distribution in Rooms, 2004Conference paper (Refereed)
  • 5.
    Einberg, Gery
    KTH, Superseded Departments, KTH Syd.
    The Influence of Airflow Profile and Heat Source Location on Heat Removal EfficiencyIn: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178Article in journal (Other academic)
  • 6.
    Einberg, Gery
    et al.
    KTH, Superseded Departments, KTH Syd.
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    Characteristics of Particles and their Behaviour in Ventilation Air2003In: The International Journal of Ventilation, ISSN 1473-3315, E-ISSN 2044-4044, Vol. 2, no 1, p. 45-54Article in journal (Refereed)
    Abstract [en]

    The behaviour of particles in air flow is important for identifying those in various locations in ventilated space. The main reason for this study is to propose a new modelling concept to determine a realistic distribution of particles of different sizes in a space. The goal for this investigation is to divide particles into groups according to their behaviour in air and to improve the existing settling model. The growth of particle aerodynamic diameter in higher relative humidity is also presented. Here, growth of diameter and coagulation is used to determine the control volume concentration. The finite volume method is used to describe the particle concentration in the computational domain. A background to particle properties and theory for calculations are given for this purpose. Results from the literature survey reveal that modelling needs a more systematic approach to cover all sizes of particles with clear classification by behaviour.

  • 7.
    Einberg, Gery
    et al.
    KTH, Superseded Departments, KTH Syd.
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    Particle Filtration in a Ventilated Room2002In: Indoor Air 2002: 9th International Conference on Indoor Air Quality and Climate / [ed] Levin, H., 2002, p. 1070-1075Conference paper (Refereed)
    Abstract [en]

    Several studies based on analytical models and numerical simulations have shown that it is difficult to control airborne particle movements in a ventilated room. However, more knowledge and information on particle characteristics and particle movements, in combination with new numerical simulation tools, have recently made it easier to estimate particle patterns. In the present paper new information is used to evaluate the role of filtration and ventilation in the particle elimination process. Key parameters found include the particle aerodynamic diameter and the particle settling velocity governed by Stokes formula. Particle dispersion and settling are highly dependent on the ventilation airflow structure. Calculations with CFD (Computational Fluid Dynamics) show characteristic patterns of particle movements in rooms with displacement ventilation.

  • 8.
    Einberg, Gery
    et al.
    KTH, Superseded Departments, KTH Syd.
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    Particle Removal Efficiency in a Numerical Test Room2003In: PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON HEATING, VENTILATING AND AIR CONDITIONING, VOLS 1 AND 2, 2003, p. 191-197Conference paper (Refereed)
    Abstract [en]

    Particle removal efficiency in a ventilated room is investigated. This paper reports the differences in particle removal efficiency with various locations of supply and exhaust devices. Numerical simulations are carried out in a simple test room to illustrate the particle concentrations with different configurations of room ventilation. Several particle sizes are used and the influence of different flow patterns and air change rates are investigated. Particles are supplied to the room with the incoming air. Isothermal conditions with varying air supply velocities are used. Preliminary results indicate that particle removal efficiency is not predominantly influenced by air exchange rate, also the location of the supply/exhaust device is underestimated as an indicator of ventilation effectiveness.

  • 9.
    Einberg, Gery
    et al.
    KTH, Superseded Departments, KTH Syd.
    Koskela, Hannu
    Finnish Inst. of Occupational Health (FIOH).
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    CFD Simulation and Measurements in Near Zone of High Induction Swirl Diffuser2004In: Roomvent 2004: Proceedings of the 9th International Conference on Air Distribution in Rooms, 2004Conference paper (Refereed)
  • 10.
    Einberg, Gery
    et al.
    KTH, Superseded Departments, KTH Syd.
    Laine, Tuomas
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    CFD Modelling as a Part of Integrated Design Process for Optimised Indoor EnvironmentIn: Automation in Construction, ISSN 0926-5805, E-ISSN 1872-7891Article in journal (Other academic)
  • 11.
    Guha, Jaideep
    et al.
    KTH, Superseded Departments, KTH Syd.
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    Forcing natural ventilation resources in a hybrid ventilated facility at KTH2004In: Proceedings of the 9th International Conference on Air Distribution in Rooms, Coimbra, Portugal 5 - 8 Sept., 2004, 2004Conference paper (Refereed)
  • 12.
    Holmberg, Sture
    et al.
    KTH, Superseded Departments, KTH Syd.
    Einberg, Gery
    KTH, Superseded Departments, KTH Syd.
    Flow behaviour in a ventilated room: measurements and simulations2002In: Proceedings of Roomvent 2002: the 8th International Conference on Air Distribution in Rooms, 2002, p. 197-200Conference paper (Refereed)
  • 13.
    Holmberg, Sture
    et al.
    KTH, Superseded Departments, KTH Syd.
    Molin, Fredrik
    KTH, Superseded Departments, KTH Syd.
    Myhren, Jonn
    KTH, Superseded Departments, KTH Syd.
    Space heating at low temperature difference between heating unit and ambient air2004In: Proceedings of the 9th International Conference on Air Distribution in Rooms, Coimbra, Portugal 5 - 8 Sept., 2004, 2004Conference paper (Refereed)
    Abstract [en]

    Rising energy prices have contributed to the development of heat pump-based heating systems in Sweden. Low flow temperature in the secondary heat distribution system to rooms is a requirement for energy-efficient systems. This increases the thermal efficiency of the heat pump and decreases thermal losses in the distribution system. Flow temperatures in water-based systems for heat distribution in buildings have been decreased from 55°C to temperatures around 30°C. This is to maximize the efficiency of heating systems that are based on heat pump technology. Different technical solutions have been suggested to guarantee space-heating requirements with low temperature difference between heating units and ambient air. Floor heating has in many cases been considered a good option, and the popularity of such systems has dramatically increased. Complicated installation work, moisture problems and slow thermal control with floor heating are reasons enough to find alternative low-temperature units for heat distribution in rooms. This may result in a combined heating and ventilation system that operates with forced convection.

  • 14.
    Nnaggenda-Musana, Assumpta
    KTH, Superseded Departments, KTH Syd.
    Sprawl and the City: house types in the formal and informal settlements of Kampala2004Licentiate thesis, monograph (Other scientific)
  • 15.
    Novakovic, Krsta
    et al.
    KTH, Superseded Departments, KTH Syd.
    Holmberg, Sture
    KTH, Superseded Departments, KTH Syd.
    The influence of air speed and turbulence intensity on thermal comfort in vehicles2004In: Proceedings of the 9th International Conference on Air Distribution in Rooms, Coimbra, Portugal 5 - 8 Sept., 2004, 2004Conference paper (Refereed)
  • 16. Ostrom, H
    et al.
    Nordlund, D
    Ogasawara, H
    Weiss, K
    Triguero, Luciano
    KTH, Superseded Departments, KTH Syd.
    Pettersson, L G M
    Nilsson, A
    Geometric structure and chemical bonding of acetylene adsorbed on Cu(110)2004In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 565, no 2-3, p. 206-222Article in journal (Refereed)
    Abstract [en]

    The chemical bonding and geometric structure of acetylene adsorbed on Cu(I 10) is analyzed using X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS) and X-ray emission spectroscopy (XES) in combination with density functional theory (DFT) total energy geometry optimizations and spectral calculations. XPS reveals two different adsorbed species at liquid nitrogen temperature. The molecular alignment is deduced from angle-resolved XAS, revealing that in one site the molecules are aligned with the C-C axis along the [0 0 1] direction and in the other site with an average angle of 35degrees to the Cu rows. The position of the shape resonance is used to deduce a C-C bond length of 1.35 Angstrom, which is close to the values obtained from the DFT geometry optimizations. XES reveals strong sigma-pi mixing and new occupied states close to the Fermi level, originating from the out-of-plane pi* orbital, which becomes occupied upon adsorption in agreement with the Dewar-Chatt-Duncanson model of the bonding.

  • 17.
    Rylander, Anna
    et al.
    KTH, Superseded Departments, KTH Syd.
    Peppard, Joe
    From Implementing Strategy to Embodying Strategy: Linking Strategy, Identity and Intellectual Capita2003In: Journal of Intellectual Capital, ISSN 1469-1930, E-ISSN 1758-7468, Vol. 4, no 3, p. 316-331Article in journal (Refereed)
    Abstract [en]

    For most knowledge-intensive companies at present, the business environment where they compete is complex, characterized by rapid change and uncertainty. Employees and other intangible resources (i.e. intellectual capital) generally represent the most critical resources in the value creation process. Crafting strategy in such contexts is not helped by conventional models and tools of strategy. The assumptions which underpin many of them do not hold in the present competitive environment, making them at best irrelevant, but at worst leading to the development of strategies that can put the success of a company in jeopardy. New metaphors for describing these companies and their competitive realities, as well as tools for navigating in them, are required, if the strategy discipline is to remain relevant for practitioners. In this paper, it is suggested that the intellectual capital perspective can provide a bridge to the practical application of a vision- and values-based strategy through the notion of embodying strategy in organizational resources. A conceptualization of strategy, that links strategy, identity and intellectual capital, more suitable to knowledge-intensive companies competing in uncertain environments, is introduced and described.

  • 18.
    Sander, Ingo
    et al.
    KTH, Superseded Departments, KTH Syd.
    Kolodziejski, Piotr
    KTH, Superseded Departments, KTH Syd.
    Leibig, Jean-Pierre
    KTH, Superseded Departments, KTH Syd.
    Using a digital recording machine as the main thread in a project based electrical engineering curriculum2001In: Proceedings of the 31st ASEE/IEEE Frontiers in Education Conference (FIE 2001), 2001, Vol. 3, p. 14-19Conference paper (Refereed)
  • 19.
    Söderqvist, Emil
    et al.
    KTH, Superseded Departments, KTH Syd.
    Carlsson, Camilla
    Brodin, Lars-Åke
    Conductance measurements in the left ventricle: a pressure-flow approach2002In: IFMBE proc., 2002, p. 1012-3Conference paper (Refereed)
  • 20.
    Söderqvist, Emil
    et al.
    KTH, Superseded Departments, KTH Syd.
    Carlsson, Camilla
    Brodin, Lars-Åke
    Elmqvist, Håkan
    Kronander, Håkan
    Ericsson, Anders B.
    Design of a single segment conductance catheter for measurement of left ventricular volume2001In: Annual Reports of the Research Reactor Institute, Kyoto University, 2001, p. 151-154Conference paper (Refereed)
    Abstract [en]

    The objective of this paper is to investigate how to best position the sensing electrodes on a single segment conductance catheter, and to calculate the expected performance. Using electrode potential data, obtained with the present five segment conductance catheter in pig experiments, we have interpolated the electrical field at any given point of time, and calculated what volume curve to expect with only two sensing electrodes. Comparison shows that the deviation between our calculated method and the present one is stable and small. Mean deviation with optimized electrode positions was 0.05% per sample, and the maximum deviation found for a single time sample was 2.57%. This indicates that it is possible to build a thin single segment catheter with as good performance as for the present five segment conductance catheter.

  • 21.
    Söderqvist, Emil
    et al.
    KTH, Superseded Departments, KTH Syd.
    Lang, Helmuth
    Källner, Göran
    Hultman, Jan
    Lind, Britta
    KTH, Superseded Departments, KTH Syd. KTH, School of Technology and Health (STH).
    Brodin, Lars-Åke
    Left ventricular pressure indicies help to evaluate loading conditions and contractility2002In: IFMBE proc, ISSN 1680-0737, p. 1014-5Article in journal (Refereed)
  • 22.
    Söderqvist, Emil
    et al.
    KTH, Superseded Departments, KTH Syd.
    Storaa, Camilla
    KTH, School of Engineering Sciences (SCI), Physics.
    Ericsson, Anders B.
    Brodin, Lars-Åke
    Ultrasound tissue doppler measurements imply that conductance changes in the left ventricle during isovolumic phases are due to tissue motion.2002In: IFMBE proc.,, 2002, p. 1016-7Conference paper (Refereed)
1 - 22 of 22
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