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

{"title":"Effects of MgO-ZSM-23 Zeolite Catalyst on the Pyrolysis of PET Bottle Waste","authors":"Pattra Kongsupapkul, K. Cheenkachorn, Supak Tontisirin","doi":"10.14416/J.IJAST.2017.08.004","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.08.004","url":null,"abstract":"The pyrolysis reaction of poly(ethylene terephthalate) or PET bottle waste was conducted comparatively in two cases: without catalyst and with MgO-ZSM-23 zeolite catalyst. The pyrolysis of PET was successfully decomposed to the product of liquid/wax, char, and gas (major product). Applying MgO-ZSM-23 catalyst, the product shows pronounced higher yield of gas (72.5 vs. 58.7 wt.%) and less yield of char solid (8 vs. 17.6 wt.%). The gas product shows less yield of CO2 (75 vs. 98 wt.%) but gives higher hydrocarbon gas fractions of C1–C5 (25 vs. 2.1 wt.%). In liquid/wax products, the catalytic pyrolysis shifted the product spectrum from higher molecular weight, e.g., biphenyl, terphenyl to benzene derivatives, predominantly in “benzoic acid”.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130177374","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":"Requirement-based Selection Model for the Expansion of Regression Test Selection","authors":"A. Lawanna","doi":"10.14416/J.IJAST.2017.08.005","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.08.005","url":null,"abstract":"Issue of maintaining software is to consider which test cases should be kept for the next modification where the size of test suite gets bigger. This makes performance of software development pull out. The objective of proposing requirement-based test case selection model is to improve ability of regression test selection, in particular, to moderate the size of test suite of the modified program, which gets larger after modification regarding the need of specific requirements, including preparing higher ability of removing faults. It comprises five main algorithms, which are finding reused test case, classifying, revising, deleting, and selecting the appropriate test cases. This paper uses six programs run on different four comparative studies, which are selectall, random, and regression test selection. It gives smaller size than the traditional techniques about 49.78% in average. Besides, it offers percent fixing faults that is higher than select-all, random, and regression test selection algorithm as around 0.06–1.32%.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125448820","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":"Comparison of Data Dissemination Protocols for Road Traffic Collecting Application in a Vehicular Ad hoc Network","authors":"Singha Wongdeethai, P. Siripongwutikorn, K. Gyoda","doi":"10.14416/J.IJAST.2017.08.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.08.001","url":null,"abstract":"Providing real-time road traffic information to drivers is a critical step to improve road traffic efficiency by allowing appropriate routes to be chosen. In a Vehicular Ad hoc Network (VANET), a query message can be disseminated along several road paths for collecting road traffic information. While several VANET protocols have been proposed to accomplish such task, they were evaluated in different settings, environments, and a limited scale. To gain better insights for actual deployment, it is necessary to explore their relative performance advantages and limitations. In this paper, we compare Slotted 1 persistence, Efficient Directional Broadcast (EDB), Data dissemination pRotocol In VEhicular networks (DRIVE), and Road Traffic Collecting (RTC) protocols under a large scale city networks, high vehicle density, multiple query sessions, and the presence of interfering background traffic. The evaluation focuses on the average percentage of targeted road segment coverage, the total number of transmitted messages, and the completion delay time. The results show that EDB outperforms other protocols in terms of the road segment coverage with highest number of transmitted messages while RTC yields a lower number of transmitted messages with less road segment coverage. However, EDB requires road-side units at every intersection and its performance dramatically drops under the failure of road-side units.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121823997","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":"Simulating the Forming of Thermoplastic, Fibre Reinforced Plastics - Demonstrated for a Side Impact Protection Beam","authors":"Sebastian Iwan, Florian Althammer, S. Mueller, Juergen Troeltzsch, L. Kroll","doi":"10.14416/J.IJAST.2017.05.006","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.05.006","url":null,"abstract":"The aim of this study is the derivation of optimal forming parameters for a realistic simulation of the forming processes using fibre reinforced thermoplastics. To do this, at first, existing solutions for the thermoplastic prepreg forming simulation are introduced and compared with the results obtained by the PAM-FORM software used for these studies. In the second step, modelling and simulation are demonstrated for a side impact protection beam. The derivation of the geometry variants from the available forming die is described, and the simulation modelling approach is defined. Additional simulation models are subjected to a sensitivity analysis, and the influence of individual parameters, such as the meshing type and the material properties, is determined. The results of the sensitivity analysis demonstrate that the simulation of the shear angle is very robust due to the variation of all parameters. So the accuracy of the simulated shear angle is not strongly affected by the choice of the forming parameters, whereby an adequate information about the formability of the blank onto the die geometry can be obtained. However, the type of die meshing and the choice of the friction coefficient has a huge influence on the stresses within the blank as well as the thickness of the blank.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130635378","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":"Solving the Location Routing Problem of the Central Rubber Market by Tabu Search","authors":"Somsak Kaewploy, Sombat Sindhuchao","doi":"10.14416/j.ijast.2017.05.007","DOIUrl":"https://doi.org/10.14416/j.ijast.2017.05.007","url":null,"abstract":"The central rubber market of Songkhla province is the center of the collection and distribution of rubber production from sellers to purchasers. It is considered ineffective because sellers need to deliver whole raw rubber to the market, resulting in high transport costs, especially for those who came a great distance and had little quantity. This research applied the tabu search method to solve the location selection problem of the rubber purchasing depot and manage transport routes to the market. Results found that there were 16 purchasing depots. The central rubber market had unlimited purchasing capacity while the other purchasing depots limited the quantity of rubber to 10 tons. There were five transport routes and five trucks (four ten-wheeled trucks and one ten-wheeled truck with a trailer). The total delivery costs were 53,313.89 baht per day. The answers about efficiency from the Lingo 13 program with small, medium, and large problems and real problems were not significantly statistically different at a significance level of 0.05.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129222151","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":"Effect of Organic Acid Pretreatment on Napier Grass (Pennisetum purpureum) Straw Biomass Conversion","authors":"M. Sriariyanun, P. Amnuaycheewa, Wawat Rodiahwati, P. Sanvarinda, K. Cheenkachorn, A. Tawai","doi":"10.14416/J.IJAST.2017.05.005","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.05.005","url":null,"abstract":"Production of specialty chemicals or bioproducts from lignocellulosic biomass has a major bottleneck at hydrolysis step due to recalcitrant structures of lignocellulose fibrils. Pretreatment is necessary to be executed to enhance saccharification efficiency. This study, the effect of acid pretreatment on lignocellulosic conversion of Napier grass was evaluated based on Response Surface Methodology (RSM). Pretreatment conditions were optimized for oxalic, citric, acetic, and hydrochloric acids. Validation indicated that the models were predictive to magnify the conversion. Hydrochloric acid exhibited highest effectiveness, followed by oxalic, acetic, and citric acids. The optimal conditions were using 0.7% (w/v) hydrochloric acid at 105°C for 60.18 min and using 5.72% (w/v) oxalic acid at 104.66°C for 76.94 min. The obtained sugar yields were low compared to those from rice straws pretreated with the optimal, same acid conditions. The results here suggested the requirement of optimization study before choosing organic acid pretreatment to different types of lignocellulosic biomass.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121315468","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":"Development of Normal and Reduced Fat Formulas of Coconut and Gac (Momordica cochinchinensis Spreng) Aril Flavored Ice Cream","authors":"S. Akkarachaneeyakorn, Rawisara Sungpuak","doi":"10.14416/J.IJAST.2017.05.004","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.05.004","url":null,"abstract":"This research aimed to develop normal and reduced fat formulas of coconut and gac aril flavored ice cream. It was determined that the suitable formula for developing the normal of coconut and gac aril flavored ice cream based on the most acceptable to consumers and has the lowest melting rate was 34.85% gac aril juice, 45.15% coconut milk, and 20% sugar. For the development of the reduced fat formula that could reduce the highest amount of fat while giving the highest acceptance scores, the variables studied were the type of fat replacer (soy protein, maltodextrin, and soy protein mixed with maltodextrin in a ratio of 1:1) and amount of fat replacer (30, 50, and 70% of fat in ice cream). It was found that the use of soy protein mixed with maltodextrin as a fat replacer at 50% was suitable for the production of the reduced fat formula of coconut and gac aril flavored ice cream (average overall acceptance was 6.53±1.43 points). The results showed that consumers cannot distinguish the differences of the normal and reduced fat formulas of coconut and gac aril flavored ice cream. For the melting rate, the reduced fat formula ice cream had a significantly lower melting rate than the normal formula ice cream.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132536522","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":"Thermodynamic Analysis and Optimization of Distillation Column: A Guide to Improved Energy Utilization","authors":"B. Nyong, Umo Aniediong Moses","doi":"10.14416/J.IJAST.2017.05.003","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.05.003","url":null,"abstract":"Energy consumption no doubt contributes a lot to the cost of production. To maximize profit, energy loss due to lost work must be minimized during production. Thus in this research, thermodynamic analysis was used to determine the energy efficiency of a propane-propylene splitter. In addition, the thermodynamic analysis was used to identify scope for possible modification and to set target for the column modification. The result indicated that the thermodynamic efficiency of the system was increased by 2.2% and the lost work in the column was reduced by 21.7Kw/hr. This was achieved by sacrificing only 2Kw/hr increase in the column minimum work.","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":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128854432","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":"Development of Ionic Liquid Utilization in Biorefinery Process of Lignocellulosic Biomass","authors":"M. Sriariyanun, Ratsarin Akkharasinphonrat, Tom Douzou","doi":"10.14416/J.IJAST.2017.05.002","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.05.002","url":null,"abstract":"Ionic liquids have been utilized in various industries as the environment-friendly organic solvents. The tailor-made properties of ionic liquids to meet the requirements of specific tasks lead to the variety of applications in biorefinery. Ionic liquid applications have been developed and integrated in biorefinery of lignocellulosic biomass processing since last decade. Conversion of lignocellulosic biomass to sugars requires both efficient pretreatment and hydrolysis enzymes to produce biofuels and specialty chemicals, and ionic liquids were applied to improve the hydrolysis yields. Ionic liquid pretreatment is one of potential method due to its high efficiency to solubilize cellulose, and its recyclability. The high extractibility of ionic liquid as a solvent was described in many studies and became the new target for R&D sectors. However, the adverse effects of ionic liquids have been discovered bringing out controversy to be discussed. The present review is aimed to provide the insight of applications of ionic liquid and current improvement direction in biorefinery.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115087971","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":"Effect of Extraction Methods on Antibacterial Activity and Chemical Composition of Chinese Chives (Allium tuberosum Rottl. ex Spreng) Extract","authors":"P. Yasurin, S. Asavasanti, Napatsorn Lawthienchai, Thanutcha Tongprasan, C. Tangduangdee","doi":"10.14416/J.IJAST.2017.05.001","DOIUrl":"https://doi.org/10.14416/J.IJAST.2017.05.001","url":null,"abstract":"The Bang-Phae organic vegetable grower community enterprise group, Ratchaburi province is one of the largest Chinese chives (Allium tuberosum Rottl. ex Spreng) growers in Thailand. However, not all of its Chinese chives meet the standard of retail markets and were sorted out. Producing Chinese chives extract is an alternative way to add value to the rejected produces. The Chinese chives essential oil contains many new and known bioactive compounds. Therefore, this experiment was aimed to study the antibacterial activity of Chinese chives extracts using 17 difference extraction conditions (Steam distillation for 1.0, 2.0, 2.5, 3.0 h; Ohmic pretreatment followed by steam distillation for 1.0, 2.0, 2.5, 3.0 h; 95% ethanol, hexane, soy bean oil extraction using dried, fresh and frozen Chinese chives) against 6 different pathogenic bacterium (Escherichia coli ATCC25822, Salmonella enterica Typhimurium U302, S. enterica Enteritidis, S. enterica 4,5,12:i (human) US clone, Bacillus cereus and Listeria monocytogenes 10403S). The disc agar diffusion method with 3 different concentrations of extracts (25, 50, 75 mg/mL) was used to evaluate the antibacterial activity. The results showed that different extraction conditions significantly affected the antibacterial activity. The higher extract concentration resulted in the better antibacterial activity. This finding indicated that both extraction condition and extract concentration significantly influence antibacterial activity. The extracts obtained from thermal extraction seem to have higher antibacterial activity than the ones obtained from cold extraction. The extract obtained from steam distillation for 2.5 h resulted in the highest antibacterial activity; 75 mg/mL of the extract caused 0.688 ±0.023 cm clear zone against B. cereus and L. monocytogenes 10403S. The chemical composition profile using GC-MS showed high percentage of organosulfide volatile compounds in thermally extracted Chinese chives. Therefore, the organosulfide volatile compounds might be responsible for effective bacteria inhibition.","PeriodicalId":352801,"journal":{"name":"King Mongkut’s University of Technology North Bangkok International Journal of Applied Science and Technology","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114593895","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}