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  • 1.
    Antonsson Lundberg, Ann-Beth
    KTH, School of Technology and Health (STH), Ergonomics.
    Improving work environment in small enterprises: The need for a holistic perspective and adaptation to small enterprise reality2007Conference paper (Other academic)
  • 2.
    Asplund, Maria
    et al.
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Hamedi, Mahiar
    Inganäs, Olle
    Forchheimer, Robert
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Neural microcontacts with wire electrodes and woven logic2007Conference paper (Refereed)
  • 3.
    Bergholm, Fredrik
    et al.
    KTH, School of Technology and Health (STH), Medical Engineering.
    Hamid Muhammed, Hamed
    KTH, School of Technology and Health (STH), Medical Engineering.
    Larsolle, A.
    Acquiring instantaneous multispectral imagery using a single image sensor with multiple filter mosaic2007Conference paper (Other academic)
  • 4. Dénes, E.
    et al.
    Fenyvesi, A.
    Futó, E.
    Kerék, Andras
    KTH, School of Technology and Health (STH), Medical Engineering.
    Kiss, T.
    Molnár, J.
    Novák, D.
    Soós, C.
    Tölyhi, T.
    VandeVyvre, P.
    Radiation tolerance qualification tests of the final source interface unit for the ALICE experiment for the ALICE collaboration2007In: Proceedings - 12th Workshop on Electronics for LHC and Future Experiments, LECC 2006, CERN , 2007, 438-441 p.Conference paper (Refereed)
    Abstract [en]

    The ALICE Detector Data Link (DDL) is a high-speed optical link designed to interface the readout electronics of ALICE sub-detectors to the DAQ computers. The Source Interface Unit (SIU) of the DDL will operate in radiation environment. Previous tests showed that a configuration loss of SRAM-based FPGA devices may happen and the frequency of undetected data errors in the FPGA user memory area is also not acceptable. Therefore, we redesigned the SIU card using another FPGA based on flash technology. In order to detect bit errors in the user memory we added parity check logic to the design. The new SIU has been extensively tested using neutron and proton irradiation to verify its radiation tolerance. In this paper we summarize the design changes, introduce the final design, and the results of the radiation tolerance measurements on the final card.

  • 5. Emri, M.
    et al.
    Opposits, G.
    Kis, S. A.
    Trón, L.
    Veres, P.
    Pányik, Á.
    Valastyán, I.
    Imrek, J.
    Moinar, J.
    Novák, D.
    Kerek, Andras
    KTH, School of Technology and Health (STH), Medical Engineering.
    Balkay, L.
    Software development framework supporting multimodal tomographic imaging2007In: 2006 IEEE Nuclear Science Symposium Conference Record, IEEE , 2007, 1857-1859 p.Conference paper (Refereed)
    Abstract [en]

    Engineers specialized in multimodal tomography regularly face a wide scale of programming tasks requiring an integrated software system to ensure cost efficiency. Accordingly, a software development framework has been worked out comprising libraries for cluster-based data acquisition, image reconstruction, management of data files and complex multimodal volumetric visualization. This framework enabled us to develop complex software for our miniPET project [1]. This software contains a graphical application integrating data acquisition, cluster monitoring, event sorting, image reconstruction, interactive image processing tools for advanced multimodal visualization. It also contains utilities to solve these tasks without graphical user interface. The components of our acquisition program can run on embedded Linux systems making new ways to develop any other types of data acquisition software that uses embedded Linux systems. A versatile development framework is developed containing specific libraries and special file formats that support multimodal tomography. This framework was successfully used to elaborate our complex miniPET software.

  • 6. Hallberg, Sven-Erik
    et al.
    Gustafsson, Alf
    Johansson, Åke
    Thunqvist, Eva-Lotta
    KTH, School of Technology and Health (STH), Centres, Centre for Health and Building, CHB.
    Anti-Skid Treatment Tests with Glucose, Fructose and Unrefined Sugar2007In: / [ed] TRB, Washington: TRB , 2007Conference paper (Refereed)
    Abstract [en]

    Over the past ten years, salt consumption for de-icing treatment on Swedish roads has been halved from approximately 400,000 tons to some 200,000 tons per year. This is largely a result of preventive measures with salt solution, which entails significantly smaller salt doses than in the case of dry and moistened salt. The purpose of the investigation has been to conduct tests with a salt solution in combination with glucose/fructose/refined sugar in order to determine whether a certain amount of the salt solution can be replaced by a product containing these substances and the kind of technical and environmental effects the mixture would have. The introductory trials, which were performed on an airport landing strip 2004/2005 gave experience of value, regarding friction coefficients etc, to continued testing. Field tests have been carried out the winter season 2005/2006. The fact that salt will continue to play an important role in anti-freeze treatment is borne out by the testing. The investigation has shown that it is possible to use a mixture of the salt solution that is today used for anti-freeze treatment together with a glucose/fructose product and maintain safety friction conditions. Exactly how large the sugar solution is and its concentration should be further studied through continued airfield trials and as well as on a section of road used by traffic. The results from the recent season as using mixtures of 75% salt and 25% sugar as well as trials on 50/50 base, looks promising. The sugar part of the solution can not melt ice but delay freezing. The product should be looked upon as a complement to salt as it leads to a lower freezing-point of the solution. Friction measurements Cost The analysis does not contain any form of financial evaluation in year one as to the cost of the solution or the value of reduced salt attack on the vehicle fleet. Since the mixtures have been produced manually and on a small scale, practical handling of the mixtures on a larger scale is included in the investigation in the winter season 2005/2006. The products environmental impact on corrosion, concrete, animal life and plant life have been studied. Oxygen is consumed in the breakdown of glucose/fructose/unrefined sugar. The breaking down of glucose/fructose/unrifined sugar by micro-organisms is influenced by the presence of toxic substances such as metals and salts and should be studied both in the field and in the laboratory. Furthermore, the oxygen consumption in recipients should be studied.

  • 7. Imrek, J.
    et al.
    Hegyesi, Gy.
    Kalinka, G.
    Moinar, J.
    Novák, D.
    Valastyán, I.
    Balkay, L.
    Emri, M.
    Opposits, G.
    Kis, S. A.
    Trón, L.
    Bükki, T.
    Szabó, Zs.
    Kerek, Andras
    KTH, School of Technology and Health (STH), Medical Engineering.
    Internals and evaluation of the miniPET-II detector module2007In: 2007 IEEE Nuclear Science Symposium Conference Record, 2007, 2930-2932 p.Conference paper (Refereed)
    Abstract [en]

    We report on the architecture of the System-on-Module (SoM) developed by our group for miniPET-II, the second version of our small animal PET scanner. The paper describes the hardware and software implementation details of the SoM we realized inside the miniPET-II detector module, the embedded Linux operation system, and the the initial results of bandwidth test measurements on the assembled SoM. Detailed description is given on the interfacing of the updated miniPET IP Core to the SoM, on the efficient data transfer method that implements device-to-device DMA transfer, and on the usage of User Datagram Protocol (UDP/IP) for high speed data transfer.

  • 8. Imrek, J.
    et al.
    Hegyesi, Gy.
    Kalinka, G.
    Molnár, J.
    Novák, D.
    Valastyán, I.
    Végh, J.
    Balkay, L.
    Emri, M.
    Kis, S.
    Trón, L.
    Bükki, T.
    Szabó, Zs.
    Kerek, Andras
    KTH, School of Technology and Health (STH), Medical Engineering.
    Development of an improved detector module for miniPET-II2007In: 2006 IEEE Nuclear Science Symposium Conference Record, IEEE , 2007, 3037-3040 p.Conference paper (Refereed)
    Abstract [en]

    We present a new detector module developed for miniPET-II, the second generation of the miniPET small animal PET scanners. The improved module features new hardware components for better performance: LySO crystal material, increased number of crystal segments, Hamamatsu H9500 PSPMT, Xilinx Virtex-4 FPGA and Gigabit Ethernet. However, the principle of operation is the same: no hardware coincidence detection is implemented, data is acquired in list mode and transfered over an Ethernet network. The resulting new module is more suitable for full ring configurations.

  • 9. Inganäs, Olle
    et al.
    Asplund, Maria
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Hamedi, Mahiar
    Forchheimer, Robert
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Neural Contacts with Conjugated Polymers in Fibre Geometries2007Conference paper (Refereed)
  • 10.
    Kleiven, Svein
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    A Parametric Study of Energy Absorbing Foams for Head Injury Prevention2007In: The 20th ESV Conference Proceedings, 2007Conference paper (Refereed)
    Abstract [en]

    This paper describes a parametric study of foammaterial properties for interior car surfaces usingfinite element calculations. Two different headmodels were used for the impact simulations, aHybrid III dummy head and a biomechanical headmodel. The objective was to study the head injurycriterion (dummy) (HIC(d)), the angular velocity, theresultant acceleration and, for the human headmodels, the strain in the brain tissue and the stress inthe skull for a variation in foam material propertiessuch as stiffness, plateau stress and energyabsorption. The analysis gave at hand that the bestchoice of material properties with respect to impactusing the Hybrid III head model reached differentresults compared to an impact with the biomechanicalhead model. For a purely perpendicular impact, theHIC(d) for the head model managed to predict thestrain level in the brain quite well. Even though theHIC reached acceptable levels for both aperpendicular and oblique impact towards a 31 kg/m3EPP padding, the maximum strain in the human headmodel for an oblique impact was almost twicesuggested allowable levels. The difference in thestrain in the brain between an oblique andperpendicular impact when impacted with sameinitial velocity towards the same padding was notpredicted by the HIC(d).

  • 11.
    Kleiven, Svein
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Förståelse för biomekaniken bakom traumatiska skallskador genom finit element modellering av det mänskliga huvudet2007Conference paper (Other academic)
  • 12.
    Kleiven, Svein
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Ny diagnostisk bildmetod för analys av händelseförloppet2007Conference paper (Other academic)
  • 13.
    Kleiven, Svein
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Parametric studies of the ballistic helmet design2007Conference paper (Refereed)
  • 14.
    Larsson, Tore J
    KTH, School of Technology and Health (STH), Centres, Centre for Health and Building, CHB.
    The Politics of Risk2007Conference paper (Refereed)
  • 15.
    Maria, Asplund
    et al.
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Thaning, Elin
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Inganäs, Olle
    Biomolecular and Organic Electronics IFM, and Center of Organic Electronics, Linköping University, SE-581 83 Linköping, Sweden.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Electroactive Polymers for Neural Interfaces: New Materials2007Conference paper (Refereed)
  • 16. Mordaka, J.
    et al.
    Kleiven, Svein
    KTH, School of Technology and Health (STH), Neuronic Engineering (Closed 20130701).
    Van Schijndel-De Nooij, M.
    De Lange, R.
    Casanova, L. J. G.
    Carter, E. L.
    Von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering (Closed 20130701).
    The importance of rotational kinematics in pedestrian head to windshield impacts2007In: International Research Council on the Biomechanics of Injury - 2007 International IRCOBI Conference on the Biomechanics of Injury, Proceedings, 2007, 83-94 p.Conference paper (Refereed)
    Abstract [en]

    The objective of the present study was to analyze the effect of angular kinematics on head injury in pedestrian head-to-windshield impacts. Three cases of pedestrian head impacts were simulated with FE head and windshield models. The initial impact conditions were obtained from pedestrian accident reconstructions carried out using multi-body pedestrian and car models. The results from the FE head model were compared with injuries reported in the database. Maximum principal strain was chosen as the injury indicator. After successful head injury predictions, the initial velocities were varied and as a result different peak angular velocities and accelerations were simulated. The results showed that increased peak change in angular velocity caused higher maximal principal strain in the brain and in consequence higher probability of Diffuse Axonal Injury (DAI), and Acute Subdural Haematoma (ASDH). A dramatic, three-fold increase in the strain levels in the brain was found when doubling the impact velocity. This paper presents work performed within the framework of a European Commission 6 th framework project (APROSYS).

  • 17. Mordaka, Justyna
    et al.
    Kleiven, Svein
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    van Schijndel-de Nooij, M.
    de Lange, R.
    Guerra Casanova, L.J.
    Carter, E.L.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Influence of rotational kinematics on pedestrian head injuries2007In: Proc. IRCOBI Conf. International Research Council On the Biomechanics of Impact, 2007, 83-94 p.Conference paper (Refereed)
  • 18.
    Myhren, Jonn Are
    et al.
    KTH, School of Technology and Health (STH), Fluid and Climate Technology.
    Holmberg, Sture
    KTH, School of Technology and Health (STH), Fluid and Climate Technology.
    Energy savings and thermal comfort with ventilation radiators: a dynamic heating and ventilation system2007In: Proceedings of Clima 2007 WellBeing Indoors, 2007Conference paper (Other academic)
    Abstract [en]

    Studies indicate that a high ventilation rate with fresh air supply directly from outdoors gives better thermal comfort conditions, less SBS (Sick Building Syndrome) symptoms and increased work productivity. The drawbacks with a high ventilation rate in natural or exhaust ventilated buildings are normally increased energy use for heating and cold air draught. Such problems may be minimized with ventilation radiators, radiators where cold ventilation air is brought directly from outdoors through a wall channel into the radiator where it is heated before entering the room.

    This paper discusses advantages with ventilation radiators in comparison to those of traditional heating systems. Focus has been on energy aspects and thermal comfort. The main conclusions are that ventilation radiators may give a stable and uniform thermal indoor climate. The high thermal gradient between cold ventilation air and the radiator surface inside the ventilation channel also makes the ventilation radiator more efficient than other systems. A method to vary indoor climate on a daily basis according to where people stay is proposed for additional energy savings with ventilation radiators. The deductions were based on results from CFD simulations in a well validated office model.

  • 19.
    Myhren, Jonn Are
    et al.
    KTH, School of Technology and Health (STH), Fluid and Climate Technology (closed 20090101).
    Holmberg, Sture
    KTH, School of Technology and Health (STH), Fluid and Climate Technology (closed 20090101).
    Summertime cooling with ventilation radiators2007In: IAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment, 2007, 533-538 p.Conference paper (Refereed)
    Abstract [en]

    Ventilation radiators, heat emitters where cold ventilation air is brought directly from outdoors into the room via heated radiator surfaces, are becoming more and more common in Scandinavia. Because these systems combine both heating and ventilation several interesting aspects arise that may be used to save energy and improve indoor thermal climate. The heating aspects in wintertime have been discussed in previous papers from KTH STH. This study investigates whether ventilation radiators may be used for cooling in summertime. Results from the study show that condensation of water is the main problem to tackle when ventilation radiators are used for cooling purposes. It is difficult to avoid condensation, especially inside the ventilation channel where incoming ventilation air comes into contact with chilled radiator surfaces. The problem increases with increased temperature difference between radiator surface and ventilation air. This is why ventilation radiators seem unsuitable for cooling in summertime without risking condensation of water. However, if condensation of water is allowed in the ventilation channel only, ventilation radiators may be functional for cooling. The trick is to find a way to drain water from the ventilation channel to avoid hygiene problems.

  • 20.
    Nordberg, Axel
    et al.
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    von Holst, Hans
    KTH, School of Technology and Health (STH), Neuronic Engineering.
    Fixation of vertebral fractures with fibre reinforced adhesive implants2007Conference paper (Refereed)
  • 21.
    Rose, Linda
    et al.
    KTH, School of Technology and Health (STH), Ergonomics.
    Larsson, Tore J
    KTH, School of Technology and Health (STH), Centres, Centre for Health and Building, CHB.
    District Veterinaries Working Environment in and around the Car2007Conference paper (Refereed)
    Abstract [en]

    A survey and a field study were carried out to study the Swedish District Veterinarians (DV’s) working environment (WE) in the car. The results show that 47% have physical problems that they connect to the work in the car. All 12 DV’s participating in the field study suffered from pain and spent 2-4 hours a day in their car. Several very unfavourable postures in manual material handling situations and computer work, leading to high strain and increased injury risks, were identified,. It is concluded that improvements would decrease long-term injury risks. Suggestions for design criteria for improving the WE are presented.

  • 22.
    Rose, Linda M.
    et al.
    KTH, School of Technology and Health (STH), Ergonomics.
    Orrenius, Ulf E
    ERAK, Ergonomi & Akustik HB.
    Calculation of the economic effects of working environment at companies and organisations: A survey of existing methods2007Conference paper (Refereed)
    Abstract [en]

    Methods to assess economic effects related to the work environment at companies and organizations are summarized and evaluated. Information was found in the open literature and by discussions with developers, researchers and end-users. The results show that several methods exist and an overview is presented here. Effects of uncertainties in the input data and the underlying assumptions are discussed. It is concluded that the application of the methods available would be stimulated by improved guidelines and by making a collection of case studies available in the public domain. Recommendations for future methodology development work are also given.

  • 23.
    Valastyán, Iván
    et al.
    KTH, School of Technology and Health (STH), Medical Engineering.
    Brodin, Lars-Åke
    KTH, School of Technology and Health (STH), Medical Engineering.
    Elmqvist, Håkan
    KTH, School of Technology and Health (STH), Medical Engineering.
    Kerek, Andras
    KTH, School of Technology and Health (STH), Medical Engineering.
    Molnar, J.
    Novak, D.
    Ribbe, T.
    Gated tomographic imaging in ectomography using a dynamic heart phantom2007In: Nuclear Science Symposium Conference Record, 2007. NSS '07. IEEE, IEEE , 2007, 3414-3417 p.Conference paper (Refereed)
    Abstract [en]

    A new computer controlled dynamic heart phantom and the connection of an ECG unit to a tomographic gamma camera system, developed for ectomographic imaging, is presented. The phantom is used for validation of the camera. Measurements were performed to test the phantom as well as to study the feasibility of gated imaging in ectomography. The camera is intended for early diagnosis of myocardial and cerebral infarctions.

1 - 23 of 23
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