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Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Present Status of Slow Positron Facility at KEK T.
Introduction There has been increasing interest in the use of slow positron beams in various fields of science.
To obtain intense beams accelerator-based positron sources[1,2,3] and reactor-based ones[4] have been developed and used successfully in studies of various materials.
An example of the Ps-TOF spectrum of a low-k material is presented in Fig. 3 where the vertical axis represents pulse height and the horizontal axis represents time.
Acknowledgement We express our thanks to Professor Uedono of University of Tsukuba for letting us use his specimen of low-k material.

Effects of Multiple Aquifers on Calculating the Bearing Capacity of Foundation Xiaoliang Wang1,a, Guangfan Li1,b,*and Wanjun Hao2,c 1College of Civil Engineering & Architecture, Hainan University, Haikou 570228, PR China 2College of Materials &Chemical Engineering, Hainan University, Haikou 570228, PR China awangxiaoliang9@sina.com, bLGF1728@163.com ( *corresponding author) , chwj8899@163.com Keywords: Multiple aquifers, Bearing capacity of foundation, Effect, Maximal influent depth, Unit weight.
Acknowledgements This work was financially supported by the National Science and Technology support plan for twelfth five years of China [No: 2012BAJ02B08-3], the Natural Science Foundation of Hainan province [No. 510205], the Major projects of haikou city [No:2012004].
Sichuan Building Materials, 2007, 02.
Journal of Liaoning Technical University, 2004, 05.

Influence of parameters involving load, speed, and slurry concentration for a given workmaterial with given abrasive (material and size) are discussed, and the optimum lapping conditions are figured out.
Important parameters identified that influence the surface quality generated during lapping process fro a given workmaterial with given abrasive (material and grain size) are the lapping load, the lapping speed and the abrasive, concentration [1,2].
Acknowledgment This work was supported by Natural Science Foundation of China (50375147, 50475119), Zhejiang Provincial Natural Science Foundation of China (Y104494), and granted financial support from The MOE Key Laboratory of Mechanical Manufacture and Automation, Zhejiang University of Technology.
Lv and Z.W Wang: Materials Science Forum, Vol.471-472 (2004), pp.473-476
Umehara: International Journal of Machine Tool & Manufacture, Vol.46 (2006), pp.151-169.

Introduction Aluminum alloys have been considered to be one of the most useful and versatile materials because of their interesting mechanical properties, such as high strength-to-weight ratio, high electrical conductivity, and good thermal conductivity.
In addition, the value of surface free energy impacts adhesion of parent material and coating.
O’Keefe, Effect of alkaline cleaning and activation on aluminum alloy 7075-T6, Applied Surface Science 257 (2011) 1859–1863
Baldan, Adhesion phenomena in bonded joints, International Journal of Adhesion & Adhesives 38 (2012) 95–116
Guo, Using surface free energy method to study the cohesion and adhesion of asphalt mastic, Construction and Building Materials 47 (2013) 254–260.

Materials and Methods The general situation of research area.
Sampling locations is in the demonstration fields under the conservation tillage, which is belong to the institute of applied ecology of Chinese academy of sciences in Gaojia country of LiShu town.
The available K major affected by material soil and human’s activities are also the reasons for differences caused by different parts.
Chinese Journal of Soil Science, 2003, 34(5):398-403
Science Press, Beijing, 1999

Some solutions have been used to reduce partly USOs radiation sensitivity: shielding, specific quartz materials, and quartz crystal pre-conditioning.
Acknowledgement This study was supported by the Beijing Municipal Natural Science Foundation (no. 2122021).
Synthetic Quartz Crystal Technology, Science Press, Beijing, 1992
Journal of applied physics, 105 (2009), 113523
IEEE Transactions on Nuclear Science, NS-31 (1984), 1223-1229

Sponsored by National Natural Science Foundation of China ( N0.234919).
London: Material Science and Technology Press, 2004:53-62
Shanghai: East China University of Science and Technology Press, 2004:40-50
[11] Wu K C.Dynamic crack growth in anisotropic material [J].
International Journal of Fracture,2000，106 (1): 1~12.

$2Material Science Research Laboratory, Department of Physics, University School of Sciences, Gujarat University, Ahmedabad- 380 009, India.
Murthy V R K, Ferrite Material Science and Technology, Springer
Davis, Electronic procedd in Non Crystalline Materials, Clarendum Press, Oxford (1979)
Iwauchi , Japanese Journal of Applied Physics, 23(1971)1520-1528

Materials Science and Technology, 1983(4): 5
Materials Science and Technology, 2013, 29(8): 937-942
Materials Science and Engineering: A, 2018, 725: 466-478
Materials Science and Engineering: A, 2019, 747: 98-110
Materials Science and Engineering: A, 2019, 744: 46-53

The building materials usually was solid clay brick, wood or aluminum alloy windows, and taking ineffective measures on roof insulation.
The heat-retaining performance of  materials used in the wall will directly affect the heat consumption of building.
(1)Choice of wall structure materials, insulation materials At present , the structural materials of residential exterior wall mainly use clay solid brick, multihole clay brick, concrete hollow block, aerated concrete block, etc.
Table 2-1 list the thermal performance parameters and prices of these insulation materials.
(2) Choice of roofing insulation materials Insulation materials which external insulation roofing commonly uses are glass wool board, polystyrene foam board, extruded polystyrene board, polyurethane insulation board.