In: CIRP Journal of Manufacturing Science and Technology, 2013, vol. 6, no. 3, p. 157–166
In a conventional design and manufacturing process, turbine blades are modeled based on reverse engineering or on parametric modeling with Computer Fluids Dynamics (CFD) optimization. Then, only raises the question of the manufacturing of the blades. As the design does not take into account machining constraints and especially tool path computation issues in flank milling, the actual performance...
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In: Swiss Engineering, Dossier Matériaux et techniques des surfaces, 2013, no. Avril, p. 30-31
La tribologie, cette science qui étudie les phénomènes susceptibles de se produire entre deux systèmes matériels en contact, immobiles ou animés de mouvements relatifs, est un sujet d’étude en vogue à la Haute Ecole Arc Ingénierie. La participation de la HES-SO Valais a permis de fabriquer par technologie des poudres un matériau remarquable, le carbure de titane-silicium (TiSiC) qui,...
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In: European Cells and Materials, 2013, vol. 26, no. Suppl. 4, p. 16
Porous titanium is used as implant material because of its high specific strength, bone-like stiffness, biocompatibility and good bone cell ingrowth provided that the open pores have sizes between 100 μm and 500μm. Powder metallurgy has been successfully used to produce titanium foams by using the space holder method. Recently, Ti grade 4 has been obtained by powder injection moulding (PIM) of...
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In: European Cells and Materials, 2013, vol. 26, no. Suppl. 4, p. 44
Testing for in vitro cytotoxicity aims at obtaining data for a test material from simplified in vitro systems that can be used to make a prognosis for a key step within the processes occurring after implantation in the human body. Depending on the application of the test specimens, one can choose from a number of different assays to assess its bioacceptance in terms of absence of cytotoxicity....
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In: AEU-Bulletin, 2013, no. 2, p. 7-14
Cet article décrit l’évolution de la profession d’ingénieur de part le monde, et en Suisse en particulier. A partir de l’observation d’une société en mutation, on étudie les nouveaux défis qui se présentent à l’ingénieur et on en déduit l’impact sur le métier et la formation d’ingénieur. On aborde ensuite la relation entre la formation et le monde du travail et...
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In: Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE, 2013, p. 7558-7563
Two-thirds of the overall primary energy in the world is consumed in cities, resulting in 71 percent of all energy related greenhouse gas emissions. There are many ongoing initiatives to develop strategies to lower the high amount of emissions at the level of cities. However, energy planners face problems that are related to the complexity of the urban energy systems, encapsulating the components...
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In: Journal of Geophysical Research, Atmospheres, 2013, vol. 18, no. 12, p. 879–892
We analyze currents of 30 positive flashes recorded on the Säntis tower, Switzerland, from May 2010 to January 2012. The currents were classified into two types. Type 1 events exhibit a large, unipolar main pulse with a risetime of tens of microseconds, followed by subsidiary peaks separated by millisecond-scale intervals. The main pulse in three flashes was preceded by a slowly rising ramp...
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In: Journal of Biomedical Optics, 2013/18/12/127001/1-127001/5
We describe a device to measure blood perfusion for the human optic nerve head (ONH) based on laser Doppler flowmetry (LDF) with a flicker stimuli of the fovea region. This device is self-aligned for LDF measurements and includes near-infrared pupil observation, green illumination, and observation of the ONH. The optical system of the flowmeter is based on a Schlieren arrangement which collects...
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In: Bulletin SEV/AES, 2013, no. 2, p. 41-45
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In: Review of Scientific Instruments, 2014, vol. 85, no. 015120, p. 4
We present a compact portable biosensor to measure arsenic As(III) concentrations in water using Escherichia coli bioreporter cells. Escherichia coli expresses green fluorescent protein in a linearly dependent manner as a function of the arsenic concentration (between 0 and 100μg/L). The device accommodates a small polydimethylsiloxane microfluidic chip that holds the agarose-encapsulated...
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