International Journal of Science and Engineering最新文献_第4页

Fabrication and Characterization of Polyimide-CNTs hybrid membrane to enhance high performance CO2 separation 聚酰亚胺-碳纳米管杂化膜的制备与表征

International Journal of Science and Engineering Pub Date : 2015-04-15 DOI: 10.12777/IJSE.8.2.115-119

T. Kusworo, B. Budiyono, A. Ismail, A. Mustafa

{"title":"Fabrication and Characterization of Polyimide-CNTs hybrid membrane to enhance high performance CO2 separation","authors":"T. Kusworo, B. Budiyono, A. Ismail, A. Mustafa","doi":"10.12777/IJSE.8.2.115-119","DOIUrl":"https://doi.org/10.12777/IJSE.8.2.115-119","url":null,"abstract":"This study investigates the CO 2 separation performance of a hybrid membranes flat sheet based on polyimide incorporated with carbon nanotubes (CNTs) particles. CNTs was selected and its loading were a 1 wt% in total solid. The hybrid composite membranes were fabricated in order to increase their separation performance for the gaseous mixture of CO 2 and CH 4 . Hybrid Composite membrane incorporated carbon nanotubes were mannufactured by the dry-wet phase inversion technique using flat sheet membrane casting machine system, in which the CNTs were embedded into the polyimide membrane and the resulting membranes were characterized. The results from the FESEM, DSC and FTIR analysis confirmed that chemical modification on carbon nanotubes surface had taken place. Sieve-in-a-cage’ morphology observed shows the poor adhesion between polymer and unmodified CNT. The results revealed that the good multi-wall carbon nanotubes dispersion leads to enhanced gas permeation properties. It is also concluded that addition of carbon nanotubes particles into the matrix of Polyimide polymer has significant effect on the membrane structure and properties.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"115-119"},"PeriodicalIF":0.0,"publicationDate":"2015-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.12777/IJSE.8.2.115-119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730471","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: 5

Analysis of IT Impact of Using Accounting Information System in Vietnam 越南会计信息系统的IT影响分析

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).16

Shiow-Luan Wang, Thi-Xuyen Do

引用次数: 0

A Cloud-Assisted P2P Streaming Architecture for Mobile Users 面向移动用户的云辅助P2P流架构

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).24

許子衡, 吳麟佑

引用次数: 0

σ-N天際線：一種新的天際線搜尋類型 σ-N天际线：一种新的天际线搜寻类型

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).28

黃璽合, 李強

引用次数: 0

以NFC為驅動的智慧居家系統架構：並將無線感測網路、社群網路和雲端計算整合進入系統架構之研究以NFC为驱动的智慧居家系统架构：并将无线感测网路、社群网路和云端计算整合进入系统架构之研究

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).13

江政勳, 陳岳良, 陳建志, 吳文泰

{"title":"以NFC為驅動的智慧居家系統架構：並將無線感測網路、社群網路和雲端計算整合進入系統架構之研究","authors":"江政勳, 陳岳良, 陳建志, 吳文泰","doi":"10.6159/IJSE.2015.(5-1).13","DOIUrl":"https://doi.org/10.6159/IJSE.2015.(5-1).13","url":null,"abstract":"本篇文章中，我們提出一種物聯網(Internet of Things，IoT)的架構，此架構整合三種網路，包括無線感測網路(Wireless Sensor Network，WSN)、社群網路(Social Network)與雲端計算(Cloud Computing)，並且使用近場通訊(Near Field Communication，NFC)來作為系統的驅動，透過近場通訊技術，用戶能直覺地將自己的需求或活動資訊輸入到系統作為觸發，驅動系統於不同的控制模式間作切換，提供給用戶最舒適的環境與監控資訊。此系統架構可應用在智能居家(Home Automation)與老人照護(Elderly Care)上，本篇文章中，我們會以智能居家做為主要的應用來作探討。系統實作部分，除系統平台建構之外，我們將展示家庭自動化、保全監控與社群網路分享和整合等應用，我們的系統讓用戶利用NFC作身份辨識及系統控制模式的切換，用戶可以使用我們基於HTML5所設計的Smart Life介面調控與設定整個系統，感測網路所接收的物理資訊經過數位化後會集中到後端的雲端計算平台作紀錄與分析，判斷是否對環境中的家電或3C產品做出控制，或傳遞通知訊息到用戶的手持裝置上，我們的平台與社群網路整合，這些訊息與資訊紀錄後用戶可以於社群網路分享，或協助進行家庭安全、監控與照護等功能之用。總而言之，我們提出了一整合無線感測網路、社群網路和雲端計算的物聯網平台架構，使用者利用進場通訊可以簡便地與系統互動；以智能居家為例，此系統可讓使用者享受到更人性化的智慧生活及安全居家環境，不僅具實用性且具備技術探討價值，還擁有延續性能夠提供使用者許多相關的客製化服務。","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"5 1","pages":"91-96"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71316474","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

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

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

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