King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology最新文献_第2页

Confidence Intervals for the Coefficient of Variation in a Normal Distribution with a Known Mean and a Bounded Standard Deviation 具有已知均值和有界标准差的正态分布中变异系数的置信区间

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-04-24 DOI: 10.14416/J.IJAST.2017.04.000

W. Panichkitkosolkul

引用次数: 2

Guidelines for Selecting the Appropriate Heel Insoles on Ladies Flat Shoes with Walking Activity 女士步行活动平底鞋选择合适鞋跟鞋垫的指南

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-22 DOI: 10.14416/J.IJAST.2017.02.007

Suchada Rianmora, Sujinda Takaew

{"title":"Guidelines for Selecting the Appropriate Heel Insoles on Ladies Flat Shoes with Walking Activity","authors":"Suchada Rianmora, Sujinda Takaew","doi":"10.14416/J.IJAST.2017.02.007","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.02.007","url":null,"abstract":"The interviewed 150 ladies from the central provinces of Thailand prefer to wear flat shoes for performing daily activities. A 54% of the interviewed group prefers to apply heel insoles for releasing stress occurred during the day; especially the ladies who are members of an aircrew or a flight attendant. Some insoles or heel inserts are available in the market without clear product instructions or descriptions, only the trained brand ambassadors have introduced and suggested the specific characteristics of their products. Cost of inserts is depended upon the reliability, the brand designers or the materials of the product. Providing product description clearly on the package can help the customers avoid any confusion and eliminate issue about having trouble getting comfortable when they are wearing shoes with inserts. Applying the technical applications proposed in this research can help to select the appropriate insoles with a reasonable price for minimizing foot pain or extending the walking period tolerance of daily activities where the same or favorite shoes still be applied.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133580237","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}

引用次数: 0

Slow Release of Menthol Using Sorbents Developed from Microwave Graphene Oxide 微波氧化石墨烯吸附剂对薄荷醇的缓释研究

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-21 DOI: 10.14416/J.IJAST.2017.02.004

Neungruthai Tippo, J. Manyam, B. Yoosuk, P. Opaprakasit, P. Sreearunothai

{"title":"Slow Release of Menthol Using Sorbents Developed from Microwave Graphene Oxide","authors":"Neungruthai Tippo, J. Manyam, B. Yoosuk, P. Opaprakasit, P. Sreearunothai","doi":"10.14416/J.IJAST.2017.02.004","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.02.004","url":null,"abstract":"Menthol is a key ingredient in many of the traditional Thai aroma products such as potpourri and herbal air freshener. However, it suffers from the rapid evaporation and sublimation loss. In this work, microwave graphene oxide (mGO) has been prepared as sorbent and tested for the slow release of menthol. Menthol was loaded into microwave graphene oxide at loading ratios of 1:0.5 and 1:1. The release performance of the mGO as compared to traditional essential oil reed diffuser and the pure menthol was studied by monitoring the menthol weight loss at the temperature of 80°C until all of the menthol evaporated using thermogravimetric analysis. It was found that mGO can significantly slow down the menthol release rate compared to that of the pure menthol by up to eight times slower. The interaction and adsorption mechanism of the menthol-loaded microwave graphene oxide was also studied using Fourier Transform Infrared Spectroscopy (FTIR) which indicates that menthol adsorbs strongly onto the mGO leading to the slow release rate.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"47 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123654043","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}

引用次数: 3

Construction Accidents in Thailand: Statistical Data Analysis 泰国建筑事故:统计数据分析

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-21 DOI: 10.14416/J.IJAST.2017.02.005

Chaiporn Vongpisal, N. Yodpijit

引用次数: 3

Effect of Extrusion Conditions, Monoglyceride and Gum Arabic Addition on Physical and Cooking Properties of Extruded Instant Rice 挤出条件、单甘油酯和阿拉伯胶对膨化即食米物理和蒸煮性能的影响

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-21 DOI: 10.14416/J.IJAST.2017.02.006

J. Wongsa, V. Rungsardthong, D. Uttapap, B. Lamsal, C. Puttanlek

引用次数: 2

Guideline for Fast Creating Virtual Mould of the Flat Feet 快速创建平面足的虚拟模具指南

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-21 DOI: 10.14416/J.IJAST.2017.02.003

Suchada Rianmora, Sirikarn Angkara, Atisthan Wuttimanop

引用次数: 0

Effect of Injection Flow on Conductive Network in Polypropylene-carbon-filler Composite Bipolar Plates 注射流动对聚丙烯-碳填料复合双极板导电网络的影响

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-10 DOI: 10.14416/J.IJAST.2017.02.002

R. Yeetsorn, M. Fowler, C. Tzoganakis

{"title":"Effect of Injection Flow on Conductive Network in Polypropylene-carbon-filler Composite Bipolar Plates","authors":"R. Yeetsorn, M. Fowler, C. Tzoganakis","doi":"10.14416/J.IJAST.2017.02.002","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.02.002","url":null,"abstract":"Bipolar plates have been manufactured by different techniques, such as high performance drilling, compression molding, metal stamping, and injection molding processes. The bipolar plates should be produced via a standard mass production technique in a one-step process, since this can reduce the cost structure of fuel cell stacks, significantly contributed by the bipolar plates. Polypropylene/three-carbon-filler composites were selected for bipolar plate production through an injection molding process for this research work. Although the conductive injection moldable composites can be produced for a bipolar plate application, their electrical conductivity, especially through plane conductivity, has not yet achieved a commercial target. For that reason, a simulation of fiber orientation in an injecting plaque using the finite element simulation program Moldex 3D was carried out with the support of Compuplast Canada Inc. to investigate the effect of an injection flow on fiber orientation in conductive networks. Even the simulation output cannot clearly elucidate the orientation of carbon fibers in the composites containing hybrid fillers as the experimental results showed. Further improvements in the development of conductive networks in injected composite bipolar plates can be achieved, for example, through tailoring of a particular injection mold geometry for the bipolar plate production.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133299431","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}

引用次数: 2

A Cultural Tourism Ontology for Lower Northern Thailand 泰国下北部的文化旅游本体

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-08 DOI: 10.14416/J.IJAST.2017.02.001

A. Salaiwarakul

引用次数: 1

Reliability Analysis for Refinery Plants 炼油厂可靠性分析

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-02-02 DOI: 10.14416/J.IJAST.2017.01.002

Itthipol Nakamanuruck, Vichai Rungreunganun, S. Talabgaew

{"title":"Reliability Analysis for Refinery Plants","authors":"Itthipol Nakamanuruck, Vichai Rungreunganun, S. Talabgaew","doi":"10.14416/J.IJAST.2017.01.002","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.01.002","url":null,"abstract":"One of the main problems in compiling Preventive Maintenance (PM) plans for large-scale industries consisting of many subunits in the production system is the criterion used in the selection of machines and equipment to be maintained. The criteria most used are the failure frequency of each machine and equipment and the maintenance cycle time specified in the manual, as preventive maintenance is considered to be mainly time-based. In some cases, Failure Mode and Effect Analysis (FMEA) technique is applied in the selection of machines and equipment by considering individual and independent machines in the subsystems. The overall mechanisms of the machines and equipment were not considered, which may affect the production capacity. Therefore, this research applies reliability engineering techniques to find the overall reliability of machines and equipment in the production system of oil refinery models and determine the machine in the subsystem that affects that overall reliability. This in turn causes optimal preventive maintenance planning for machines and equipment in order to achieve the maximum efficiency for the oil refinery process. This research begins by studying the procedures of oil refinery models, then creating a reliability block diagram of the subsystems to find the reliability of the machines and equipment within each subsystem. Afterwards, the overall reliability of the production system will be determined, which leads to arranging the reliability of machines and equipment in the subsystems in ascending order. This develops into the preventive maintenance planning process so that the refinery process achieves its maximum efficiency.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"18 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114489911","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}

引用次数: 3

Passive Controller Design of Mass Exchanger Network 质量交换网络无源控制器设计

King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology Pub Date : 2017-01-26 DOI: 10.14416/J.IJAST.2017.01.001

T. Srinophakun, Niaon Prajimtis, Thanawat Upienpong, S. Skogestad

{"title":"Passive Controller Design of Mass Exchanger Network","authors":"T. Srinophakun, Niaon Prajimtis, Thanawat Upienpong, S. Skogestad","doi":"10.14416/J.IJAST.2017.01.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.01.001","url":null,"abstract":"This work mainly focuses on applying the passivity concept to a mass exchanger network. Development of the mass exchanger state space model with controller design is proposed. The state space equations of the mass exchanger model have been developed based on assumptions a of lumped parameter system, including well mixing rich and lean streams, a linear equilibrium relation over the operating range and isothermal and isobaric conditions. The mass exchanger model is characterized as a non-passive system due to its positive passivity index, and according a weighting function is introduced to shift the system to passive region along with the controller tuning. A case study of a five-streams mass exchanger network with four control loops is demonstrated using a weihing function to again counter the non-passive characterstic. Multi-loop passive PI controllers of the mass exchanger network are developed. This passive control configuration is tested by both disturbance rejection and set-point tracking. The designed passive controllers are able to completely eliminate the impact of disturbance effects, and all control loops show good performance to track 4, 15, 3 and 1.5% change of the set-points.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132198760","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}

引用次数: 0