King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology最新文献

{"title":"Thermal Direct Joining of Hybrid Plastic Metal Components","authors":"E. Haberstroh, M. Sickert","doi":"10.14416/J.IJAST.2014.07.002","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.07.002","url":null,"abstract":"Joining technologies for multi-material design become more important. A new technology to combine the advantages of adhesive bonding and mechanical joining is the Thermal Direct Joining of plastic and metal. In this process the metal joining partner is heated up to temperatures above the melting temperature of the thermoplastic. If the joining temperature is reached, the thermoplastic is pressed under defined force to the heated metal. The thermoplastic melts close to its surface and wets the metal. Afterwards the joint is cooled under pressure. The advantages of Thermal Direct Joining are short cycle times, high bonding strengths and high reproducibility and process stability. Heating by a permanent heated stamp is investigated. The joining equipment was further developed to shorten cycle times, to raise reproducibility and to investigate on optimal process parameters. The results show that high tensile-shear strengths up to 25 MPa can be observed in short term overlap shear tests for the combinations of aluminium or steel with polyamide 6, polyamide 6 with 30 wt.-% short glass fibre reinforcement or thermoplastic fibre reinforced plastic with polyamide 6 matrix.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116616975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Material Property Modification of Continuous Fibre-reinforced Aluminium Matrices Produced by Semi-solid Forming Strategies","authors":"M. Liewald, K. Riedmüller","doi":"10.14416/J.IJAST.2014.07.003","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.07.003","url":null,"abstract":"Targeting lightweight concepts, research activities in the fields of automotive engineering, aerospace engineering as well as civil engineering are focusing on the development of high-strength and high-rigidity composite materials. Such composites are to be used where properties of conventional materials are not able to withstand the constantly increasing demands of industrial applications. In this context, the Institute for Metal Forming Technology/Stuttgart is concerned with the development of new processes for the manufacturing of metal matrix composites utilizing semi-solid forming strategies. Thereby, the objective target is the infiltration of continuous reinforcing components like carbon or glass fibres by aluminium matrix materials.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115393777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel Halotolerant Cellulolytic Bacillus methylotrophicus RYC01101 Isolated from Ruminant Feces in Thailand and its Application for Bioethanol Production","authors":"Aiya Chantarasiri","doi":"10.14416/J.IJAST.2014.07.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.07.001","url":null,"abstract":"One impediment of large-scale biofuel production from lignocellulosic biomass is the insufficiency of cellulolytic microorganisms that can overcome extreme conditions during the industrial process. This study emphasized the isolation of a novel efficient cellulolytic bacterium. A new Bacillus methylotrophicus RYC01101, isolated from ruminant feces in Thailand, produced a hydrolysis capacity greater than that of known cellulolytic bacteria (Cellulomonas sp.). Cellulase activities were investigated on CMCase activity and FPase activity by 0.230±0.004 and 0.080±0.007 U/mL, respectively. B. methylotrophicus RYC01101 was co-cultured with Saccharomyces cerevisiae TISTR 5111 for bioethanol production. The productivity of the bioethanol was 1.38±0.40 g/L after 120 hours of fermentation. Moreover, B. methylotrophicus RYC01101 could be grown in the presence of 10% (w/v) NaCl, which could be applied in the pretreatment step of biofuel production. This study was the first report on cellulolytic activity and the halotolerant ability of B. methylotrophicus.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126719476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Variable Rotation Polishing Method in Chemical Mechanical Polishing Process","authors":"P. Phaisalpanumas, Keisuke Suzuki, P. Khajornrungruang, K. Kimura","doi":"10.14416/J.IJAST.2014.06.002","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.06.002","url":null,"abstract":"Variable rotation polishing method has been studied to improve performance for the next generation wafer size of 450 mm in Chemical Mechanical Polishing (CMP) technology. This method adds the backward rotation of a polishing platen against the only forward rotation, i.e. the conventional polishing. Polishing slurry could be more efficiently supplied into the center area of the larger wafer due to the backward rotation of the platen. Material removal rate at the condition the backward rotation experimentally became 38% higher in comparison with only forward rotation. In this case, slurry film thickness of the Variable Rotation Polishing (VRP) method was slightly thinner than that of conventional rotation. Next, the asperities of polishing pad surfaces were evaluated by confocal laser scanning microscope. The higher material removal rates would also be achieved by the movement of the asperity bending back and forth direction on the polishing pad surface during the forward and backward rotation of the platen. These observed polishing pad surfaces indicated that the asperity preservation on the polishing pad is one of dominant parameters to improve the material removal rate of wafer surface in CMP process.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127511904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factor Affecting on Accumulation of Gamma-Aminobutyric Acid (GABA) in Rice Germ (Khao Dawk Mali 105)","authors":"Sriwiang Tipkanon, A. Abdallah","doi":"10.14416/J.IJAST.2014.06.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.06.001","url":null,"abstract":"GABA content in rice germ is affected by many factors. The objective of this study was to screen significant factors which affecting on GABA content. The four factors (pH , CaCl 2 concentration , soaking temperature, and soaking time) were tested using the eig ht-run Plackett-Burman design. Factors were considered to have significant effects on response at a = 0.05. The results revealed that soaking temperature and soaking time most significantly affected GABA content (positive effect). Subsequently, effect of soaking temperature and time were conducted by soaking the rice germ in 0.5 mmol/L CaCl 2 , pH 6 at 30, 40, and 50 ° C and in various time: 1, 2, 4, 8, and 16 h. The results indicated that during soaking rice germ at 40 ° C for 8 h had the highest in GABA content (307.1 mg/ 100 g of rice germ, dry basis).","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127070596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integration of a 2D Vision System into a Control of an Industrial Robot","authors":"Matthäus Stepien, R. Biesenbach","doi":"10.14416/J.IJAST.2014.04.006","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.04.006","url":null,"abstract":"Industrial robots play an important role in today’s production. They are mostly tied to the production process by teached orders. To make industrial robots more flexible and more interesting for the industry, they are often additionally equipped with a vision system. Thus, they are not bound by their fixed program and able to adapt their path to each object individually. This paper explains the cooperation of a six-axis industrial robot and a 2D-Vision System. Here, the precision of the robot and the accuracy of the vision system are combined. The vision system In Sight Micro 1100 acquires quality and localization tasks. It locates the object, inspects it and judged its quality. These results are finally send to the robot controller of KUKA KRC 2 Edition 2005 in the form of coordinates and are ultimately put into action by the industrial robot KUKA KR 16-2. With the software In Sight Explorer 4.8.0 a visual order can be created and adapted to the existing conditions. It offers a variety of preset localizing and qualitative tools. Alternatively, there is the possibility to created special tools in a spreadsheet program. The paper describes the interface between vision system and robot. Finally, an inspection station for work piece quality control is created from the derived results.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134463186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy and Exergy Analysis of Steam Boiler and Autoclave in Fiber Cement Process","authors":"Winit Bouapetch, T. Srinophakun, W. Prakaypan, A. Paterson","doi":"10.14416/J.IJAST.2014.05.002","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.05.002","url":null,"abstract":"The fiber cement composite production process consumes extremely high fuel especially boiler and autoclave leading to the release of a lot of waste energy. In this study, the concept of energy and exergy utilization is analyzed and illustrated in the form of the Sankey diagram. It was found that the energy and exergy efficiencies of the boiler were 72.04 and 69.98%, respectively. The exergy destruction of the boiler system is 30% or 3.89 MW. Which can also be represented in the Power Available Diagram (PAD). In the exergy analysis, there are 2 methods in reducing the energy loss of the boiler by increasing the steam outlet temperature or reducing the temperature of the exhaust gas of the boiler. For the autoclave system, the energy analysis showed the total energy input at 43.67 GJ/batch. The three main energy losses are; the exhaust steam (49.74% or 23.74 GJ/batch), condensate (16.42% or 7.83 GJ/batch) and autoclave shell heat loss (13.67% or 6.25 GJ/batch). For the exergy, the exergy destruction in the autoclave is at 87.14%. However, the PAD of the autoclave cannot present the relation of the exergy loss. The main causes of the exergy destruction are the three main energy losses; the exhaust steam (50.80%), condensate (16.47%) and autoclave shell loss (10.01%) respectively.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115782170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Evaluation of the Center of Pressure by the Multi-Layers Rubber Mats Using Image-base Rapid Pressure Measuring System","authors":"T. Kaewwichit, C. Tseng, Chong-Ching Chang","doi":"10.14416/J.IJAST.2014.04.003","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.04.003","url":null,"abstract":"The Multi-Layers Rubber Mats (MLRM) ink footprint has been used to analyze plantar pressure in qualitative data and foot arch index for the customized insole which reflected pressure beneath barefoot. In this study, the MLRM was evaluated the center of pressure (COP) in quantify data by image-base measuring system. The footprint in static and dynamics states were performed to investigate significant difference of the COP. Subsequently, the COP results were compared with a pressure platform. The results showed that, there were some estimate disparity in XCOP (17.4%, p<0.001) and showed good relationship on the YCOP (4.23%, p=0.278) coordinate where compared with the pressure platform. Then, the COP from dynamic state which affected of accumulated pressure during performed dynamic action and the results showed good relation in disparity to static state. Therefore, the evaluation of the COP by image-base measuring system is helpful for clinician or insole maker which able to check the COP from MLRM ink footprint.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117094740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient and Effective Testing of Automotive Software Product Lines","authors":"Anastasia Cmyrev, Ralf Reißing","doi":"10.14416/J.IJAST.2014.05.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.05.001","url":null,"abstract":"Within the automotive industry, the clients’ high demand for individually customized products results in a growing number of product variants. In order to control the complexity of developing these variants, a product line approach is used that supports reuse of the common set of assets (e.g. requirements, software code, and test cases). The naive approach to assure quality of the variants derived from the product line would be to individually test each variant. However, due to the large number of variants it is virtually impossible to test all variants in detail and still release the product line on time. In this paper, we propose a new test approach based on requirements coverage and variant properties coverage (i.e. feature coverage) that leads to effective but also efficient test coverage of all variants of the product line. A set of variants is selected that is 1) as small as possible, 2) covers all requirements of the product line, and 3) covers all features of the product line. This small set of variants is then tested in detail. Reducing the number of tested variants allows for deeper testing and thus finding more defects. Because of the coverage achieved by the variant set, the quality of all other variants can be inferred from the test results. Finding the optimal set of variants in itself is a very hard problem, i.e. in an industry setting with huge numbers of possible variants it is practicably infeasible to strive for the optimum. Therefore, we developed two approaches which are not guaranteed to find the optimal set but get very near to it in little time. First, a greedy algorithm was created which produced very good results in very little time in all case studies. For example, for a system with one million variants a set of eight representing variants was selected within seconds. Second, a simulated annealing approach was evaluated in order to check for further potential of improvement. However, the case studies showed that the greedy algorithm is the better choice for practical results.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130352619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study of Heat Transfer for Supercritical Carbon Dioxide with Upward Flow in Vertical Tube","authors":"J. Hsieh, Boreum Lee, M. Chung, D. T. Lin, Shu Guo","doi":"10.14416/J.IJAST.2014.04.005","DOIUrl":"https://doi.org/10.14416/J.IJAST.2014.04.005","url":null,"abstract":"In this study heat transfer of supercritical carbon dioxide in vertical tube with 10 mm of inner diameter and 1800 mm of length was investigated experimentally. The initial temperature of tube wall was set to 150 and 200°C. The system pressures of supercritical carbon dioxide are 1100, 1500 and 2000 psi, respectively. The experimental results show that the heat transfer coefficient and heat transfer rate increase with Reynolds number. The maximum heat transfer coefficient and heat transfer rate was occurred in 1500 psi of system pressure. The heat transfer coefficient for 150°C is higher than that of 200°C resulted from effect of specific heat.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121400734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}