12,745 research outputs found
Na Stavbu Chramu, M.J. Husa v Praze
No full textNA STAVBU CHRAMU, M.J. HUSA V PRAZE
Na Stavbu Chramu, M.J. Husa v Praze ( -
Towards the standardization of a testing method for the end-stop impacts of suspension seats
No full textStandard tests of the vibration isolation efficiency of suspension seats currently use narrow-band input spectra representing the motions of specific vehicles. The motions used in these tests have near-Gaussian amplitude distributions, whereas vehicle motions include occasional extreme movements causing end-stop impacts of the seat suspension which increase the exposure of the seat occupant to vibration and shock. Tests have been conducted with various vibration magnitudes so as to quantify suspension seat isolation efficiency in terms of the ratios of the vibration dose values (VDVs) at the base of the seat, above the seat suspension and above the seat cushion. It is shown that the vibration response of a seat suspension occurs in five stages according to the magnitude of the input vibration, and that the cushion of a suspension seat may reduce the severity of severe end-stop impacts. The dynamic performance of a suspension seat when supporting a human subject and when supporting a sand bag is compared and the effect of mid-position adjustment is demonstrated. The form of an end-stop impact test which could supplement existing tests so as to evaluate the overall performance of suspension seats is discussed.</p
2 Bild-Marke, Provinzial-Museum Hannover, Ältere Meister, M.J. Miereveld, Weibliches Bildnis
No full text2 BILD-MARKE, PROVINZIAL-MUSEUM HANNOVER, ÄLTERE MEISTER, M.J. MIEREVELD, WEIBLICHES BILDNIS
2 Bild-Marke, Provinzial-Museum Hannover, Ältere Meister, M.J. Miereveld, Weibliches Bildnis ( -
Vacuum Insulation Panels Applied in Building Constructions
No full textDue to sustainability and due to international treaties, it is desired and required to reduce greenhouse gas emissions drastically. One contributor to these emissions is the burning of fossil fuels for generating power and electricity to be used in and for buildings. Buildings and building-related processes are responsible for about 40% of the primary energy consumption in the European Union. More than half of this energy is applied for heating systems in dwellings and commercial buildings. The European Union therefore has laid down new energy performance requirements for buildings in the European Directive on the Energy Performance of Buildings. Moreover, a reduction of energy losses of buildings during their occupational phase is important for facilitating the implementation of sustainable energy sources in the built environment. Increasing the insulation value of the envelope of buildings may contribute to this reduction of primary energy use. Two strategies can be followed. The first strategy is to increase the thickness of the thermal insulation layer. Until recently, this strategy has primarily been adopted. If, however, German or Swiss Passivhaus standard is applied, the thickness of this insulation layer would increase to beyond 30 cm, resulting in very thick building enclosures. The second, more innovative, strategy for reducing energy losses through the building skin would be the application of more effective thermal insulators. One such more effective thermal insulator is a vacuum insulation panel, abbreviated as VIP. A VIP consists of an open-celled core material which is evacuated and then tightly sealed into a barrier envelope to maintain this vacuum. The vacuum inside the pores of the core material reduces the thermal conductivity of the product significantly, as a result of which the thickness of the insulation layer can be reduced to obtain a certain performance. This reduction of thickness is among the most promising features for large-scale application of VIPs in the building industry. However, integration of VIPs into buildings must be performed very meticulously for several reasons; first, due to its nature a VIP cannot be processed on site and needs careful planning in advance; second, it is very sensitive to mechanical damage thus requiring careful handling; third, thermal bridges along the panel’s edges reduce its performance; fourth, the composite system is highly subjected to aging. This dissertation therefore looks into many of these aspects, presents several calculation tools and shows how VIPs can be applied in façade panels, EPS insulation boards and as under-floor insulation. With the wide-spread proliferation of VIPs in buildings a more sustainable and healthy environment can then be achieved.Building TechnologyArchitectur
Efficient expression and purification of milk-derived antibacterial peptides in Escherichia coli via artificial oil body system
No full textEffects of bile acid enemas on GLP-1 and PYY secretion in healthy humans
No full textM.J. Bound, T. Wu, B. Gedulin, M. Horowitz, C.K. Rayne
DS_10.1177_0022034518781765 – Supplemental material for Activity of <i>Streptococcus mutans</i> VicR Is Modulated by Antisense RNA
No full textSupplemental material, DS_10.1177_0022034518781765 for Activity of Streptococcus mutans VicR Is Modulated by Antisense RNA by L. Lei, R.N. Stipp, T. Chen, S.Z. Wu, T. Hu and M.J. Duncan in Journal of Dental Research</p
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