International Journal of Science and Engineering最新文献_第6页

Implement N-Distance-Greedy w/ M-Direction-Greedy Forwarding in Vehicular Ad Hoc Network 在车载Ad Hoc网络中实现n距离贪婪w/ m方向贪婪转发

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).10

黃建皓, 蘇淑茵

引用次数: 0

利用訊號變化與遮蔽效應之802.11 MAC碰撞避免協定利用讯号变化与遮蔽效应之802.11 MAC碰撞避免协定

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).19

陳柏岳, 盧彥甫, 陳青文

{"title":"利用訊號變化與遮蔽效應之802.11 MAC碰撞避免協定","authors":"陳柏岳, 盧彥甫, 陳青文","doi":"10.6159/IJSE.2015.(5-1).19","DOIUrl":"https://doi.org/10.6159/IJSE.2015.(5-1).19","url":null,"abstract":"IEEE 802.11 DCF is widely used and able to avoid the collisions of the hidden terminal problem in a wireless network. However, there may be collisions existing in the DCF MAC protocol. That is, when a node in NAV state does not receive any control signal, a collision may occur after the node ends the NAV period. In this paper, to solve this collision problem, a detailed analysis about the problem is given. Afterwards, according to the analysis, we utilize the “masking effect” and the detection of signal variation to design the MAC collision avoidance protocol. With the received signal strength and the variation of received signal strength of a node, the node can determine whether there are other transmissions occurring in the transmission range. Therefore, a node can determine whether the period of NAV state can be extended to avoid collisions. Simulation results show that our proposed MAC protocol can efficiently reduce 60% and 41% collisions than the IEEE 802.11 DCF protocol and OCS-MD. In addition, our proposed MAC protocol also shows shorter transmission delay and lower retransmissions than the 802.11 DCF and OCS-MD to have better network throughput.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"5 1","pages":"131-140"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71316365","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

THE EFFECT OF ANNEALING TEMPERATURES AFTER THERMOMECHANICAL PROCESS TO THE CORROSION BEHAVIOR OF Ni3(Si,Ti) IN SULFATE SOLUTION 热处理后退火温度对Ni3(Si,Ti)在硫酸盐溶液中腐蚀行为的影响

International Journal of Science and Engineering Pub Date : 2015-02-18 DOI: 10.12777/IJSE.8.2.141-145

G. Priyotomo, Y. Kaneno

引用次数: 2

Reliability based design optimization of concrete mix proportions using generalized ridge regression model 基于广义岭回归模型的混凝土配合比可靠性优化设计

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/IJSE.8.1.26-37

R. Aggarwal, Maneek Kumar, R. Sharma, M. Sharma

{"title":"Reliability based design optimization of concrete mix proportions using generalized ridge regression model","authors":"R. Aggarwal, Maneek Kumar, R. Sharma, M. Sharma","doi":"10.12777/IJSE.8.1.26-37","DOIUrl":"https://doi.org/10.12777/IJSE.8.1.26-37","url":null,"abstract":"This paper presents Reliability Based Design Optimization (RBDO) model to deal with uncertainties involved in concrete mix design process. The optimization problem is formulated in such a way that probabilistic concrete mix input parameters showing random characteristics are determined by minimizing the cost of concrete subjected to concrete compressive strength constraint for a given target reliability. Linear and quadratic models based on Ordinary Least Square Regression (OLSR), Traditional Ridge Regression (TRR) and Generalized Ridge Regression (GRR) techniques have been explored to select the best model to explicitly represent compressive strength of concrete. The RBDO model is solved by Sequential Optimization and Reliability Assessment (SORA) method using fully quadratic GRR model. Optimization results for a wide range of target compressive strength and reliability levels of 0.90, 0.95 and 0.99 have been reported. Also, safety factor based Deterministic Design Optimization (DDO) designs for each case are obtained. It has been observed that deterministic optimal designs are cost effective but proposed RBDO model gives improved design performance.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"26-37"},"PeriodicalIF":0.0,"publicationDate":"2015-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730176","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: 4

APPLICATION OF WELL LOG ANALYSIS IN ASSESSMENT OF PETROPHYSICAL PARAMETERS AND RESERVOIR CHARACTERIZATION OF WELLS IN THE “OTH” FIELD, ANAMBRA BASIN, SOUTHERN NIGERIA 测井分析在尼日利亚南部anambra盆地“oth”油田岩石物性参数评价及储层表征中的应用

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/IJSE.8.1.47-53

E. Uroro, E. L. Igharo

{"title":"APPLICATION OF WELL LOG ANALYSIS IN ASSESSMENT OF PETROPHYSICAL PARAMETERS AND RESERVOIR CHARACTERIZATION OF WELLS IN THE “OTH” FIELD, ANAMBRA BASIN, SOUTHERN NIGERIA","authors":"E. Uroro, E. L. Igharo","doi":"10.12777/IJSE.8.1.47-53","DOIUrl":"https://doi.org/10.12777/IJSE.8.1.47-53","url":null,"abstract":"Over the past years, the Anambra basin one of Nigeria’s inland basins has recorded significant level of hydrocarbon exploration activities. The basin has been confirmed by several authors from source rock analyses to have the potential for generating hydrocarbon. For the hydrocarbon to be exploited, it is imperative to have a thorough understanding of the reservoir. Computer-assisted log analyses were employed to effectively evaluate the petrophysical parameters such as the shale volume (Vsh), total porosity (TP), effective porosity (EP), water saturation (Sw), and hydrocarbon saturation (Sh). Cross-plots of the petrophysical parameters versus depth were illustrated. Five hydrocarbon bearing reservoirs were delineated in well 1, four in well 2. The reservoirs in well 3 do not contain hydrocarbon. The estimated reservoir porosity varies from 10% to 21% while their permeability values range from 20md to 1400md. The porosity and permeability values suggest that reservoirs are good enough to store and also permit free flow of fluid. The volume of shale (0.05% to 0.35%) analysis reveals that the reservoirs range from shaly sand to slightly shaly sand to clean sand reservoir . On the basis of petrophysics data, the reservoirs are interpreted a good quality reservoir rocks which has been confirmed with high effective porosity range between 20% and high hydrocarbon saturation exceeding 55% water saturation in well 1 and well 2. Water saturation 3 is nearly 100% although the reservoir properties are good.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"47-53"},"PeriodicalIF":0.0,"publicationDate":"2015-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.12777/IJSE.8.1.47-53","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66729970","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

Profile Triglycerides Japanese Quail (Coturnix coturnix japonica) After Giving Turmeric (Curcuma longa) Powder 日本鹌鹑(Coturnix Coturnix japonica)服用姜黄(Curcuma longa)粉末后的甘油三酯

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/IJSE.8.1.65-68

Sukarman Hadi jaya Putra, T. R. Saraswati, S. Isdadiyanto

{"title":"Profile Triglycerides Japanese Quail (Coturnix coturnix japonica) After Giving Turmeric (Curcuma longa) Powder","authors":"Sukarman Hadi jaya Putra, T. R. Saraswati, S. Isdadiyanto","doi":"10.12777/IJSE.8.1.65-68","DOIUrl":"https://doi.org/10.12777/IJSE.8.1.65-68","url":null,"abstract":"The purpose of this study was to determine the triglyceride profile of Japanese quail (Coturnix coturnix japonica) after being given the parameters of turmeric (Curcuma longa) powder; feed intake, profiles of liver triglycerides, profiles of serum triglycerides and profiles of meat triglycerides. This study uses an experimental method with A Completely Randomized Design Pattern. Test animals used were 45 female Japanese quails were divided into 3 groups, namely; P0: quail were not given turmeric powder, P1: quail were given turmeric powder a dose of 54 mg/quail/day, P3: quail were given turmeric powder a dose of 108 mg/quail/day. Each group with 5 replications. Each repeat consists of 3 Japanese quails. Provision of treatment every day for 30 days starting from the age of 14 days. Data were analyzed using analysis of variance (ANOVA) followed by Duncan's test with 95% confidence interval (α = 0.05 level). Analysis of the data used is software Minitab software 16. Results showed that the levels of turmeric powder are given in Japanese quail significant (P˂0.05) on liver triglyceride levels, serum and Japanese quail meat but had no significant effect (P˃0.05) on consumption feed. The results showed that the optimal dose of turmeric powder to lower triglyceride levels of Japanese quail is 108 mg/quail/day as evidenced by the highest decrease in liver triglyceride profiles, profiles of serum triglycerides and triglyceride profiles of Japanese quail meat compared with other treatments.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"65-68"},"PeriodicalIF":0.0,"publicationDate":"2015-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730131","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: 8

Preliminary study of seaweed drying under a shade and in a natural draft solar dryer 海藻在阴凉处和自然通风太阳能干燥器中干燥的初步研究

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/ijse.8.1.10-14

H. Phang, C. Chu, S. Kumaresan, M. M. Rahman, S. Yasir

{"title":"Preliminary study of seaweed drying under a shade and in a natural draft solar dryer","authors":"H. Phang, C. Chu, S. Kumaresan, M. M. Rahman, S. Yasir","doi":"10.12777/ijse.8.1.10-14","DOIUrl":"https://doi.org/10.12777/ijse.8.1.10-14","url":null,"abstract":"A solar dryer was designed to study the seaweed drying process under natural convection and compared to a shade drying process. A dewatering pre-treatment process was initially applied to enhance drying process for both methods. The initial weight of seaweed before pre-treatment and after pre-treatment was recorded and the seaweed was then introduced into the solar drying system and shade drying system. The air temperature and relative humidity inside the solar dryer and surrounding were recorded during experiment. A representative sample on each tray was taken for final moisture content determination where the difference of seaweed weight less than 5% for subsequent measurement. The average weight loss of seaweed from pre-treatment was about 54%. The final moisture content of seaweed for solar drying was in the range of 24-61% (d.b.) and for shade drying was in the range of 40-48% (d.b.) with a standard deviation of final moisture content of 20.45% for solar drying and 3.78% for shade drying. The total time for solar drying inclusive of pre-treatment was 6 days and shade drying was 9 days. The drying kinetics of each method was modeled and the results of this study will be utilized to enhance the design and operations of seaweed solar dryers.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"10-14"},"PeriodicalIF":0.0,"publicationDate":"2015-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.12777/ijse.8.1.10-14","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730106","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: 17

Modelling of HTR (High Temperature Reactor) Pebble-Bed 10 MW to Determine Criticality as A Variations of Enrichment and Radius of the Fuel (Kernel) With the Monte Carlo Code MCNP4C HTR(高温堆)球床10mw模型在燃料(核)浓缩和半径变化下确定临界的蒙特卡罗代码MCNP4C

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/ijse.8.1.42-46

Hammam Oktajianto, E. Setiawati, V. Richardina

{"title":"Modelling of HTR (High Temperature Reactor) Pebble-Bed 10 MW to Determine Criticality as A Variations of Enrichment and Radius of the Fuel (Kernel) With the Monte Carlo Code MCNP4C","authors":"Hammam Oktajianto, E. Setiawati, V. Richardina","doi":"10.12777/ijse.8.1.42-46","DOIUrl":"https://doi.org/10.12777/ijse.8.1.42-46","url":null,"abstract":"Gas-cooled nuclear reactor is a Generation IV reactor which has been receiving significant attention due to many desired characteristics such as inherent safety, modularity, relatively low cost, short construction period, and easy financing. High temperature reactor (HTR) pebble-bed as one of type of gas-cooled reactor concept is getting attention. In HTR pebble-bed design, radius and enrichment of the fuel kernel are the key parameter that can be chosen freely to determine the desired value of criticality. This paper models HTR pebble-bed 10 MW and determines an effective of enrichment and radius of the fuel (Kernel) to get criticality value of reactor. The TRISO particle coated fuel particle which was modelled explicitly and distributed in the fuelled region of the fuel pebbles using a Simple-Cubic (SC) lattice. The pebble-bed balls and moderator balls distributed in the core zone using a Body-Centred Cubic lattice with assumption of a fresh fuel by the fuel enrichment was 7-17% at 1% range and the size of the fuel radius was 175-300 µ m at 25 µ m ranges. The geometrical model of the full reactor is obtained by using lattice and universe facilities provided by MCNP4C. The details of model are discussed with necessary simplifications. Criticality calculations were conducted by Monte Carlo transport code MCNP4C and continuous energy nuclear data library ENDF/B-VI. From calculation results can be concluded that an effective of enrichment and radius of fuel (Kernel) to achieve a critical condition was the enrichment of 15-17% at a radius of 200 µ m, the enrichment of 13-17% at a radius of 225 µ m, the enrichments of 12-15% at radius of 250 µ m, the enrichments of 11-14% at a radius of 275 µ m and the enrichment of 10-13% at a radius of 300 µ m, so that the effective of enrichments and radii of fuel (Kernel) can be considered in the HTR 10 MW. Keywords —MCNP4C, HTR, enrichment, radius, criticality","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"42-46"},"PeriodicalIF":0.0,"publicationDate":"2015-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730319","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: 7

Drying Characteristics and Product Quality of Lemon Slices Dried with Hot Air Circulation Oven and Hybrid Heatpump Dryers 热风循环烘箱和混合热泵烘干机干燥柠檬片的干燥特性及产品质量

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/IJSE.8.1.69-74

Yong Hong Lee, S. Chin, B. Chung

{"title":"Drying Characteristics and Product Quality of Lemon Slices Dried with Hot Air Circulation Oven and Hybrid Heatpump Dryers","authors":"Yong Hong Lee, S. Chin, B. Chung","doi":"10.12777/IJSE.8.1.69-74","DOIUrl":"https://doi.org/10.12777/IJSE.8.1.69-74","url":null,"abstract":"In this research, drying characteristics and product quality of Coulomb-force-assisted heatpump and oven dried lemon slices were studied. Lemon slices with 3 mm thickness each, were dried using oven and Coulomb-force-assisted-heatpump dryer with and without auxiliary heater at different drying conditions. It was found that the drying rate of the lemon slices dried by all drying methods showed only falling rate states, which indicates the drying kinetics were controlled by internal moisture diffusion. Oven drying of lemon slices at 60°C showed the highest drying rate among all, followed by oven dried slices at 50°C, Coulomb-force-heater-assisted-heatpump (CF-HT-HP) dried slices at 31°C, Coulomb-force-assisted-heatpump (CF-HP) dried slices at 22°C, oven dried slices at 40°C and heatpump dried slices at 22°C. The average effective moisture diffusivity value for the slices dried with these drying methods was found in the range of 16.2 to 63.8´10 -4 mm 2 min -1 . In terms of quality assessment, CF-HP dried lemon slices retained the highest amount of Vitamin C as compared to the lemon slices dried by other drying methods. However, it retained relatively lower amount of total phenolic content (TPC) as compared to oven dried products. Among of all, CF-HP drying method produced dried lemon slices with the highest Vitamin C (6.74 mg AA / g dry weight) whereas oven dried lemon slices at 50°C preserved most of the TPC in the dried slices, which recorded as 13.76 mg GA / g dry weight.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"69-74"},"PeriodicalIF":0.0,"publicationDate":"2015-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.12777/IJSE.8.1.69-74","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730512","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: 7

DEVELOPMENT OF JAPANESE QUAIL (Coturnix coturnix japonica) EMBRYO 日本鹌鹑胚胎的发育

International Journal of Science and Engineering Pub Date : 2015-01-15 DOI: 10.12777/IJSE.8.1.38-41

T. R. Saraswati, S. Tana

引用次数: 3