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A Novel Collagen Sponge for Cartilage Tissue EngineeringGuoping Chen 1* , Daisuke Akahane 1,2, Naoki Kawazoe 1, Yoshio Shirasaki 3, Junzo Tanaka 4, Katsuyuki Yamamoto 2 and Tateishi Tateishi 1,2 1 Biomaterials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan 2 Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, Japan 3 Institute for Human and Science Biomedical Engineering, Advanced Industrial Science and Technology, Japan 4 Department of Metallurgy and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, Japan.
Guoping.CHEN@nims.go.jp Key words: Scaffold, collagen sponge, tissue engineering, differentiation, MSC, chondrocyte Abstract.
The collagen sponge facilitated cell seeding and chondrogenic differentiation of MSCs, and will be useful for cartilage tissue engineering.
The sponge was used for three-dimensional culture of human MSCs for cartilage tissue engineering.
Materials and Methods Preparation of Collagen Sponge.

Polymer composite materials based on low molecular weight silicone rubber SKTN-D have been developed, which are supposed to be used as impression materials in dentistry.
In this regard, it is relevant to study the current market of available siloxane impression materials and the development of cost-effective impression materials based on domestic low-molecular-weight silicone rubbers.
The Effect of Adhesive Additives on the Properties of Isoprene Rubber, Key Engineering Materials, 2019, т.816, pp.255-259
Samuilov, Research of Structure and Properties of Rubber Mixtures with Adhesion Additives on the Basis of Carbamide, Key Engineering Materials, 2020, Vol. 869, pp. 424-430
Zenitova, Polymeric Composite Material for Medical Purposes, Key Engineering Materials, 2019, Vol. 816, pp. 250-254.

An Integrated Measurement System for Pyromagnetic Effect of Prefabricated Defects Polymer Materials Yong-zhong Zhang1, a, Ying-she Luo2,b , Jian-xin Su3, Sheng-ming Chen2, Jia Ren1 and Ling-tao Zhang1,c 1College of Computer Science and Information Technology，Central South University of Forestry and Technology, Changsha, Hunan, 410004, China 2Hunan Provincial Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China 3College of Information Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China azyz69@163.com, blys0258@sina.com（corresponding author）, czhanglt@126.com Keywords: prefabricated defects polymer material; pyromagnetic effect; integrated measurement system Abstract.
There exist multi-field coupling effect in prefabricated defects polymer materials under loading.
Introduction Weak thermally induced magnetic fields would be formed in prefabricated defects polymer materials under loading [1, 2].
It is important to understand the rheological properties of such pyromagnetic effect in the loading material with visco-elastic plastic damage, which would be valuable for rational use of materials, design of new materials, production safety, and accident prevention, etc. [1, 2 , 3, 4, 5, 6, 7].
Damage theory and its application of prefabricated defects rheological materials (Science Press, Beijing 2001).

Looking for more effective methods of software development, is the current research emphases and hotspot in the field of software engineering.
To this, we propose having the organ characteristic bionic components as the basic unit of software engineering method.
On this basis, we define the bionic software growth function with time and the corresponding software is determined by the average fitness of the life of the relationship between as follows: (1) Software engineering method of bionic components The identification of bionic components Recognition is based on bionic components the basis and prerequisite of the software engineering method, and the bionic a primary issue in the study of software engineering method.
The mythical man - month: essays on software engineering [M].
Computer engineering and design. 2010, 31 (8) : 22-25 [8] Tateishi T.What is bionic design[J], Materials Science and Engineering: C,1997,4(4):205-212.

Zhang Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064 Corresponding author email: hsfan68@hotmail.com Key word: electrospinning; tissue engineering; scaffold; PLA Abstract A electrospinning process to prepare soft tissue engineering scaffold was introduced in this study.
One key factor limiting tissue engineering is to prepare a suitable scaffold.
[6][7] To investigate the potential to be used as tissue engineering scaffold, polylaticacid was chosen to prepare and microscopic structure, porosity, mechanical property, especially cytocompatibility of the scaffold were evaluated. 2 Materials and methods 2.1 Materials PLA with an average molecular weight of 200,000 was purchased from Chinese Academy of Science, Chengdu Organic Substation and dissolved in analysis grade acetone with certain concentration. 2.2 Electrospinning scaffold The electrospinning schematic illustration is showed in the followed figure 1.
(ρ, density of electrospun scaffold; ρ0, density of raw materials).
Principles of tissue engineering 1997; 263-272 2 Wan-Ju Li, Cato T.

Results demonstrate that parameters of materials can be calibrated efficiently from the DSM and that key aspects for this calibration are noise, sensitivity (structural and sensor), and the finite element model representation.
In this last case, one of the materials was steel and the properties for the other were determined from an inverse problem experiment.
Tsikos: ASCE Journal of Engineering Mechanics (2000), p 711-724
Lozano: Smart Materials and Structures (2003), p 776-784
Roesset: Computer Aided Civil and Infrastructure Engineering (2007), p 265-281

The Study on the Key Technologies in Multiple Agent-based Intelligent Tutoring System Yan Yu1,a, Jianhua Wang1,b* 1Institute of Computer Science and Information Engineering,Harbin Normal University,Harbin 150025, China a email:yuyan9999@vip.qq.com, bemail: WJH@vip.163.com *Corresponding author.
The first generation offers learns teaching materials and related information as well as other associated education website links.
In addition to offering online learning materials, the second generation as well requests learners to conduct two-way asynchronous communications via emails, e-bulletin boards, and online exercises and measures.
The workload of plenty of network course development is just two to three weeks’ work by two to three persons with the contents of nothing but piling up classroom teaching materials
Computer Engineering and Applications,2002(6):6-7

Research and Application of Slope Stability Analysis Method based on Engineering Mechanics and Engineering Materials Shaojie Feng 1,2,a, Shiguo Sun1, Xuefang Zhao 1, Liang Tan 3 1 College of Architecture, North China University of Technology, Beijing, 100144, China 2 School of Soil and Water Conservation, Beijing Forestry University, Beijing,100083,China 3 China Building Technique Group Co.Ltd.
According to results of engineering practice, the result of 3D-Slope is accordance with actual engineering
Chinese Journal of Rock Mechanics and Engineering,(2007):1513-1528
Advanced Materials Research.Vols.518-523 (2012):4749-4752 [5] Shaojie Feng, Shiguo Sun.
China Mine Engineering. (2007):41-44

The Applications of the Electron Beam Machining Technology in Research of Materials Science Hang Li, Hailang Liu, Haihua Yu, Yiping Huang (Institute of Electrical and Mechanical Engineering, Guilin University of Electronic Technology, Guilin 541004, China) email: 843174150@qq.com, email: liuhl@guet.edu.cn, email: 413810615@qq.com, email: hyp@guet.edu.cn Key words: Electron beam, Materials processing, Surface treatment Abstract.
When electron beam bombards materials, electronic and metal collision lose kinetic energy, most of the energy is converted into heat, cause the local temperature of the materials rising sharply and melting, even gasification and have been removed, so as to realize the material machining.
The main applications of EDM in the field of materials research The application status.
Three beam material modified state key laboratory of dalian university of technology used electron beam to irradiate the material surface to study the material surface modification.
Li, etal: Materials Review, Vol. 21 (2007), p.246 [11] Y.M.

Materials and Methods Fly Ash.
Curing time and engineering properties of the fly ash-based geopolymer materials compared to lightweight concrete brick in ASTM C90.
Nguyen, Evaluation on Roles of Activated Silicon and Aluminum Oxides for Formation of Geopolymer from Red Mud and Silica Fume, Key Engineering Materials. 777 (2018) 513-517
Nguyen, Effect of Alkaline Activators to Engineering Properties of Geopolymer-Based Materials Synthesized from Red Mud, Key Engineering Materials. 777 (2018) 508-512
Do, Leaching Behavior and Immobilization of Heavy Metals in Geopolymer Synthesized from Red Mud and Fly Ash, Key Engineering Materials. 777 (2018) 518-522