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omenclature x x-coordinate(along circumferential direction) z z-coordinate(along axial direction) h local film thickness p film pressure Kx, Kz correction factors: η dynamics viscosity of lubricant Kx=12+0.0136(Rec) 0.9 vφ permeability of porous material Kz=12+0.0043(Rec) 0.98 ps supply pressure U linear velocity of spindle H thickness of restrictor qv volume flow of fluid c specific heat of fluid A flow areas T film temperature pt pressure of fluid reservoir ρ lubricant density Introduction The performance of high speed spindle system directly influences the development of the high speed machining technology, which is a key technology of AMT (Advanced Manufacturing Technology).
umerical Calculations for Hybrid Ceramic Bearing Lubricated by Water Based Fluid According to the special ceramic materials and the porous restrictor, which is applied for its high rigidity and excellent stability with vibration damping under certain conditions, the numerical calculation program for high speed hybrid bearing was compiled with FORTRAN language.
The above calculation of the bearing is similar to that of common journal bearing where there have been considerable theoretical work on the relative numerical computations[7, 8].
Acknowledgements This work was support by the National Natural Science Foundation of China (No. 50975199).

4H-SiC Planar MESFETs on High-Purity Semi-insulating Substrates Jeong Hyuk Yim 1,a, Ho Keun Song1,b, Jeong Hyun Moon1,c, Han Seok Seo1,d, Jong Ho Lee1,e, Hoon Joo Na1,f, Jae Bin Lee2,g and Hyeong Joon Kim 1,h 1 School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea 2 R&D Center, Sangshin Elecom, Choong Chung Nam Do, 339-814, Korea a marine2@snu.ac.kr, bsongho@snu.ac.kr, csilrok6@snu.ac.kr, dboyface1@snu.ac.kr, e elhoho00@snu.ac.kr, fhjna@snu.ac.kr, gjblee@sangshinec.com, hhjkim@plaza.snu.ac.kr Keywords: MESFET, High-purity semi-insulating (HPSI) substrate, Current instability Abstract.
Introduction Because of its excellent properties, such as high electric breakdown field, high saturated electron drift velocity and high thermal conductivity, silicon carbide (SiC) becomes an attractive material for high power microwave devices. 4H-SiC MESFET, particularly, has the capability of high voltage, high output impedance, high matching convenience and wide bandwidth.
Spencer: Journal of Applied Physics Vol. 90(1) (2001),p. 337.

Spring steel 65[8] with yield stress 784MPa, Young's modulus 206GPa, Poisson's ratio 0.28[9], density 7.8×103 kg/m3 safe parameter 1.5 and allowable stress 523MPa, is selected as the material of nanopositioner. 3D eight-node structural solid elements are chosen for the mesh generation (SOLID45).
Acknowledgement The project is supported by the National Natural Science Foundation of China No. 10372069.
Chinese Journal of Scientific Instrument.
[9] Yilin Su, et al., Research Room of Material Mechanics of Tianjin University.
Material Mechanics.

In experiment the structure shown in Figure 1 improved, electromagnetic coil instead of permanent magnets, increasing the current in electromagnetic coil to increase sealing pressure, and setting coil and magnetic pole on the output shaft, filling non-magnetic materials in a sealed slot.
Magnetic fluid seal of gearbox output shaft Permanent magnet use optimum comprehensive performance sintered Nd-Fe-B type, material grade: N38.
[3] Li Decai, Theory and Application of Magnetic Fluid, Science Press, Beijing , 2003
[4] Pan Yuxian, Rui Yannian and Shen Ming, Machine Manufacture, Vol. 43 , 2005, pp.44 – 47 [5] Sun Mingli, Li Decai, Cui Hairong and He Xinzhi, “Numerical Simulation for Magnetic Fluid Sealing Device,”Journal of Beijing Jiaotong University, Vol. 32, 2008, pp. 116 – 118

This important steelwork was demolished in 1941 to recover the metallic material to be used in war.
Mazzucchetti on the "Journal of Civil Engineering" in 1867 (Report on the work carried out for the final station of the railways in Turin) [1], until the monograph published by L.
This is probably due to material (i.e. concrete, pieces of tiles and bricks) that fills the space between the heads of the trusses and the masonry.
This material becomes wet after rainwater leaking and provokes a high moisture content in wood that is therefore more subject to xilofagus fungis attack. 80% of the timber elements of the trusses have been classified according to resistance through Thematic Fiche (i.e.
Touliatos (editors), Interaction between Science, Technology and Architecture in Timber Construction, Elsevier, Paris, 2004

Cooling and Freezing of Cashew Apple Using Computational Fluid Dynamics: The Effect of the Moisture Content Alves Agra Brandão VANDERSON1,a*, Araújo de Queiroz ROBSON1,b, Gustavo Guedes de Morais Lima HALLYSON1,c, Pereira de Farias RAIMUNDO2,d, Raquel Carmo de Lima ANA1,e, Bastos da Silva Júnior JOSELITO3,f and Gilson Barbosa de Lima ANTONIO1,g 1Department of Mechanical Engineering, Federal University of Campina Grande (UFCG), Zip Code 58429-900, Campina Grande, Paraiba, Brazil. 2Department of Agricultural Sciences, State University of Paraiba (UEPB), Zip Code 58884-000, Catolé do Rocha-PB, Brazil 3Department of Food Engineering, Federal University of Campina Grande (UFCG), Zip Code 58429-900, Campina Grande, PB, Brazil avanderson_agra@hotmail.com, brobson_frr@hotmail.com, challyson@ccta.ufcg.edu.br, drp.eng.tec@gmail.com, eanaraquel_alimentos@hotmail.com, fjoselito.bastos@hotmail.com, gantonio.gilson@ufcg.edu.br Keywords: Temperature
The cold preserves the food by the total or partial inhibition of the main agents that cause changes in the material such as: microbiological activity, enzymatic and metabolic after harvest [8].
The thermophysical properties of biological materials depend on the characteristics of each product, such as moisture content, structure, chemical composition and temperature, andthus, to identify theinfluence of these parameters in thethermo-physicalproperties plays important role for a correct formulation of the heat transfer processes.
International Journal of Refrigeration, v.13, n.6, p.379-392, 1990

Insulations can be in various shapes of blankets made from mineral fibres, blown-in, foamed-in-place, rigid insulation made from fibrous material, reflective insulation fabricated from aluminium foils, etc.
Adopted from http://koeppen-geiger.vu-wien.ac.at/present.htm [Accessed date 08 April 2014] [3] Allen and Jano, 2001, Fundamentals of Building Construction; Materials and Methods, John Wiley & Sons, Inc., p.230 [4] Depecker, P., Menezo, C., Virgone, J., Lepers, S. 2000.
Adopted from http://www.sciencedirect.com/science/article/pii/S0360132300000445> [Accessed date 03 April 2014] [5] Aksoy, U., Inalli, M. 2005.
Journal of Solar Energy Engineering – Transactions of the ASME, 135 (4):10.1115/1.4025427, Nov 2013, ISSN: 0199-6231

It can not only relieves the strain on energy supply, reduces dependence on fossil fuels[1], but also has a wide raw material sources.
Experimental 1.1 Materials And Equipment PME: Lab homemade, in line with the national standard GB20828-2007.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (51076069 and 51376095).
Journal of JiangSu University, 2010, 31 (1): 31-39

Augmenting the ports dimension makes for reducing flow resistance and saving copper material.
But the critical diameter for back-fire is only mentioned in correlative reference as 3.5mm on round port for natural gas, without information about burner material.
For copper material, the critical diameter should be larger according to the thermal conductivity.
Mishra, Experimental studies of flame stability limits of CNG–air premixed flame, Energy Conversion and Management, Volume 48, Issue 4, April 2007, Pages 1208-1211 [9] Bernard Lewis, Guenther von Elbe, Combustion, Flame and Explosion of Gases, Academic Press; 3 edition (July 12, 1987) [10] Pierre Pelce and Paul Clavin, Influence of hydrodynamics and diffusion upon the stability limits of laminar premixed flames, Journal of Fluid Mechanics (1982), 124: pp 219-237 [11] Jared Crosby, Lean Premixed Flame Stability Investigations, UTSR Gas Industrial Turbine Fellowship Participant at Pratt & Whitney, May 23 - Aug 12, 2005 [12] S Ishizuka, C K Law, An experimental study on extinction and stability of stretched premixed flames, 19th Symp Int on Combustion (1982) , Volume: 379, Issue: 1, Publisher: The Combustion Institute, Pittsburgh, Pages: 327-335 [13] Paul Clavin, Dynamic behavior of premixed flame fronts in laminar and turbulent flows, Progress in Energy and Combustion Science, Volume

In the previous study, Iseki has developed the incremental sheet metal bulging method using water jet for the clean forming without the need for lubricating material.
In the previous study, Iseki has developed the incremental sheet metal bulging method using water jet for the clean forming without the need for lubricating material, considering the environmental clarification and a rapid and flexible manufacturing of shell products with a variety, a proper quantity and a good quality [6-9].
Conclusions (1) An incremental sheet metal bulging method using water jet and shots has been proposed to form shells of strong, hard and thick sheet metal for the clean forming without lubricating material
Ohsiro carried out experiments for this work at the laboratory of Manufacturing Science and Engineering.
Iseki: JSME International Journal, Series C, Vol.44 (2001), p.486 [10] B.