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Introduction Obtainment of high-quality thick layers and bulk crystals of AlN suitable for use as substrates for optoelectronic and high-power microwave electronic devices is a currently pressing problem of modern semiconductor science and technology.
Another problem of AlN sublimation growth is high aggressivity of aluminum vapors, which extremely limits the choice of container material.
The main container material – tungsten can not be used for growth on SiC wafers, because at growth temperatures it forms eutectic with silicon vapors.
That is why we suggest tantalum carbide as a container material.
Helava, Experimental and theoretical analysis of sublimation growth of AlN bulk crystals, Journal of Crystal Growth 310 (2008) 881-886.

Comparison of Hand-Arm Vibration on Truck Steering Wheels Based on Speed Changes Using I-kaz Method Shamsul Akmar Ab Aziz1,2,a, Mohd Zaki Nuawi1,4,b, Mohd Jailani Mohd Nor1,4,c and Dian Darina Indah Daruis3,d 1Department of Mechanical and Material Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia 2Science and Technology Research Institute for Defense (STRIDE), Ministry of Defense, Tmn Bkt Mewah Fasa 9, Kajang, Selangor, Malaysia 3Universiti Pertahanan Nasional Malaysia (UPNM), Sg.
Mohd Yaman, Noise, vibration and harshness (NVH) study on malaysian armed forces (MAF) tactical vehicle, Applied Mechanics and Materials. 165 (2012) 165-169
Nizwan, Development of integrated kurtosis-based algorithm for z-filter technique, Journal of Applied Sciences. 8, 8 (2008) 1541-1547

Radiation-Induced Graft Polymerization of Maleic Anhydride onto Poly-ββββ -Hydroxybutyrate Herong Ye, Dongzhi Yang, Ping Hu*, Fengbo Zhang and Qinglei Qi Institute of Polymer Science and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, China yhr02@mails.tsinghua.edu.cn Keywords: Poly-β-hydroxybutyrate, Maleic anhydride, Radiation grafting, Thermostability Abstract: This paper focuses on an effective way to improve the thermostability of poly-β-hydroxybutyrate (PHB).
However, it must be noted that PHB is a somewhat stiff and brittle material, readily subject to thermal decomposition.
Advantages of radiation grafting include no requirement of a catalyst or an initiator, polymeric material forms at room temperature, superior suitability for high purity biomaterial production and an easily manageable reaction.
Experimental Material.
Hu: Polymer Journal. 33(2001),P647-653

Duralumin alloy (mass density ρ=2810 kg/m3, Young modulus E=7.2×1010 N/m2, Poisson ratio σ=0.33) is the selected material of the cylinder and cantilevers.
Steel (ρ=7800 kg/m3, E=2.06×1011 N/m2, σ=0.3) is the material of end caps and screw.
The PZT ceramics material is PZT-41.
Acknowledgements This project is supported by the National Natural Science Foundation of China (No. 50875057).
Zhao: Journal of Vibration, Measurement & Diagnosis Vol. 24 (2004), p. 1-5.

Simple hot embossing technique was utilized for micropump construction with PMMA material which appear to be good rapid prototype technique to be further integrated in disposable biomedical application due to its low cost, bio-compatibly and chemical inert properties.
Jung, High-rate sputtering of thick PZT thin films for MEMS, Journal of Electroceramics 25 (2010) 198-202 [3] H.
Qiu, Characterization and MEMS application of low temperature TiNi(Cu) shape memory thin films, Materials Science and Engineering: A 438-440 (2006) 1106-1109 [4] D.

Static and Dynamic Characteristic Analysis of the tower for Vertical Axis Wind Turbine Based on Finite Element Method Gong Yanjue 1, a, Zhang Yuanyuan2, b, Zhao Fu1, c,Xiang Huiyu1, d, Meng Chunling1, e, Zhang Yuan1, f 1School of Material and Mechanical Engineering, Beijing Technology and Business University, China 2China Ship Research and Development Academy ayjgong@th.btbu.edu.cn, b542907131@qq.com, czhaoffu@163.com, dXianghy@th.btbu.edu.cn, emengcl@th.btbu.edu.cn, fzhangyuan1965@126.com Keywords: vertical axis wind turbine; tower; finite element method Abstract.
The material is high strength dilute alloy steel Q345, the elastic modulus is 2.1E+11N/m^2, the poisson ratio is 0.3, the density is 7850kg/m^3 and the yield strength is 3.51E+8Pa.
For the most basic problem involving a linear elastic material which obeys Hooke’s Law, the matrix equations take the form of a dynamic three dimensional spring mass system.
References [1] Zhao Rongzhen, Lv Gang, Static Analysis of the Tower for Horizontal Wind Turbine Based on Finite Element Method, Wind Turbine Technology, Vol.4 (2009), P.42-44 [2] Jin Xin, Du Jing, He Yulin, Application of Simulation in Analysis of Performance of Wind Turbine, Journal of System Simulation, Vol.12 (2007), P.2823-2830
[3] Xiangxin Liu: Basic and Application of ANSYS, Science Publishing, China (2006)

The basic idea is to replace the conventional cylindrical pipe by a textured pipe of the same material, diameter and wall-thickness.
Von-Mises elastoplastic material definition (Table 1) with isotropic hardening is used.
Bilinear material model (Table 1) using von-Mises plasticity with isotropic hardening is adopted.
International Journal of Mechanical Sciences, 2013. 68(0): p. 224-235

Analysis of the Adhesive-bonded Joint Stress in a MW Segmented Assembly Wind Turbine Blade Liu Lang 1,a, Li Gongyu 1,b , Sun Jie 1,c and Liu Qingbo 1,d 1Faculty of Mechanical and Electrical Engineering,Kunming University of Science andTechnology，Kunming 650093, China aliulanghn@gmail.com, blgy0203@sina.com, cjs5861975@126.com, dlqbxiaoyaofei@foxmail.com Keywords: adhesive-bonded joint stress; tress analysis; finite element method; glue line interface.
The blade material is FRP and the adhesive of the joint is epoxy resin, and the related stiffness of them has order of magnitude difference.
The material properties of the FRP and the foam core are anisotropic.
[3] Luo Yifeng, World Wind Energy and its blade material development overview and trends, Hi-Tech Fiber & Application, 2003，28-5
[11] LiLong,HuPing,LiuLizhong,Strength of Unsymmetric Single—lap Adhesively Bonded Joints, Journal of Agricultural Machinery,2011,42-1

Acknowledgment This research is financially supported by the National Science Foundation of China under grant No. 51075126.
A Fuzzy Multicriteria Decision –Making Method for Material Selection.
Journal of Manufacturing Systems,1996,15(1):1-12 [2] T.
Key Engineering Materials, v 455, p 575-579, 2011 [5] Zhanqi Hu, Wu Zhao.

Material and Method Culture Medium Slant medium：PDA medium Seed medium：glucose 60g/L，Bran 8g/L ，(NH4)2SO4 10g/L，KH2PO4 5g/L，MgSO4 1g/L Fermentation medium：Malt extract powder 18g/L，Yeast extract 3.22g/L，KH2PO4 Experimental method Seed preparation : Cultured 4d slant tube at 28 ˚C was rinsed with sterile water, preparing spore suspensions of 10-8cfu/mL, 250mL Erlenmeyer flask by inoculation access 2% with 100mL seed liquid , culturing at 28 ˚C, 200r/min for 48 h Fermentation conditions : 250mL Shake bottle with fermentation medium 50mL, according to the inoculation amount 10%, 28 ˚C, 200r/min shaking culture 5d, the initial pH natural.
Acknowledgements This work was financially supported by National Natural Science Foundation of China (21076114).
Journal of Agricultural and Food Chemistry Vol. 44 (1996) , p. 2336
Takeo: Phytochemistry Vol. 120 (1981), p. 2145 [5] C.Zhang, R.Huang, H.Tian: Applied Mechanics and Materials Vol.419 (2013), p.328 [6] S.Jung, S.