International Journal of Science and Engineering最新文献_第5页

Heat and mass transfer effects on an unsteady mhd flow of a rotating fluid past a vertical porous plate 旋转流体通过垂直多孔板的非定常流动的传热传质效应

International Journal of Science and Engineering Pub Date : 2015-04-15 DOI: 10.12777/IJSE.8.2.95-103

G. Murali, E. Reddy, B. NarepalepuVenkataN.

引用次数: 0

Sensitization of Xanthophylls-Chlorophyllin Mixtures on Titania Solar Cells 叶黄素-叶绿素混合物对二氧化钛太阳能电池的增敏作用

International Journal of Science and Engineering Pub Date : 2015-04-15 DOI: 10.12777/IJSE.8.2.109-114

I. Kartini, L. Dwitasari, T. Wahyuningsih, C. Chotimah, Lianzhou Wang

{"title":"Sensitization of Xanthophylls-Chlorophyllin Mixtures on Titania Solar Cells","authors":"I. Kartini, L. Dwitasari, T. Wahyuningsih, C. Chotimah, Lianzhou Wang","doi":"10.12777/IJSE.8.2.109-114","DOIUrl":"https://doi.org/10.12777/IJSE.8.2.109-114","url":null,"abstract":"Co-sensitization of natural dyes on TiO 2 for dye-sensitized solar cell (DSSC) was proposed between chlorophyllin (C) and xanthophylls (X at various volume ratios of C/X. Chlorophyllin is chlorophyll derivative providing -COOH groups essential for binding to TiO 2 . The chlorophyll was extracted from dried spinach ( amaranthus viridis ) leaves in a mixture of methanol-acetone (70%:30%). Chlorophyll extract dye was obtained after partition of the crude extracts in diethyl ether solution. Then, it was hydrolyzed under alkaline condition to get chlorophyllin. Xanthophyll was extracted from fresh petal of chrysanthemum ( chrysanthemum indicum ) flowers. Blending of chlorophyllin and xanthophyll was carried out at various volume ratios of C to X (1:0, 5:1, 1:1, 1:5, 0:1). Titania solar cells were constructed in sandwich system of conducting glass-titania/dyes as the photoanode and conducting glass-platinum as the photocathode. Electrolyte solution containing I - /I 3 - was inserted between the electrodes by capillary action. All dye extracts and blending solutions were analyzed by UV-Vis spectrophotometer. It is shown that the absorption spectra of blending dyes are complimentary in the visible region resulted in a panchromatic response of the dyes. From the cyclic voltammogram of the dyes and blended-dyes, it is found that the energy level of xanthophyll is the lowest. The I-V test at 100 mw/cm 2 irradiation confirmed that the energy conversion efficiency ( h ) of the blended dyes of xanthophyll and chlorophyllin-sensitized solar cell resulted in significant improvement than those of the single dye. Beneficially, the mixed dyes can be adsorbed from solution blend using single dipping step.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"8 1","pages":"109-114"},"PeriodicalIF":0.0,"publicationDate":"2015-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730811","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: 10

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

Correlation Equations of Heat Transfer in Nanofluid Al2O3-Water as Cooling Fluid in a Rectangular Sub Channel Based CFD Code 基于CFD程序的纳米流体al2o3 -水作为冷却流体在矩形子通道中的传热相关方程

International Journal of Science and Engineering Pub Date : 2015-04-15 DOI: 10.12777/IJSE.8.2.120-124

A. I. Ramadhan, A. N. Lasman, Anggoro Septilarso

{"title":"Correlation Equations of Heat Transfer in Nanofluid Al2O3-Water as Cooling Fluid in a Rectangular Sub Channel Based CFD Code","authors":"A. I. Ramadhan, A. N. Lasman, Anggoro Septilarso","doi":"10.12777/IJSE.8.2.120-124","DOIUrl":"https://doi.org/10.12777/IJSE.8.2.120-124","url":null,"abstract":"Safety is a major concern in the design, operation and development of a nuclear reactor. One aspect of nuclear reactor safety factor is thermal-hydraulics aspect. In a PWR-type nuclear power plant has been used lighter fluid coolant is water or H2O. In this research, using nanofluid Al2O3-Water with volume fraction of (1%), (2%) and also (3%), used as a cooling fluid in a nuclear reactor core with sub channel PWR fuel element rectangular arrangement. This research was carried out modeling of fuel elements are arranged rectangular, then performed numerical simulations using Computational Fluid Dynamics (CFD) code. In order to obtain the characteristic pattern of flow velocity of each fluid, the fluid temperature distribution along the cylinder wall temperature distribution of the fuel element. Then analyzed the heat transfer in a nuclear reactor core with sub channel PWR fuel element rectangular arrangement, including heat transfer coefficient, Nusselt number (Nu), as well as heat transfer correlations. Heat transfer correlation for nanofluid Al2O3-Water (1%), (2%) and also (3%) proved to core of PWR nuclear reactor fuel element sub channel rectangular arrangement with the Reynolds number (Re) is stretched, namely: 404 096","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"730 1","pages":"120-124"},"PeriodicalIF":0.0,"publicationDate":"2015-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.12777/IJSE.8.2.120-124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66730598","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

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

Web Forensic Evidence of SQL Injection Analysis SQL注入分析的Web取证证据

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).22

H. C. Tseng, Bernard Chia, T. Juang

{"title":"Web Forensic Evidence of SQL Injection Analysis","authors":"H. C. Tseng, Bernard Chia, T. Juang","doi":"10.6159/IJSE.2015.(5-1).22","DOIUrl":"https://doi.org/10.6159/IJSE.2015.(5-1).22","url":null,"abstract":"In the WEB 2.0 generation, web attack becomes common and widely exploits by the intruders to unauthorized access. According to the survey from OWASP (Open Web Application Security Project's), SQL injection attack (SQLIA) placed the first in the OWASP 2013's top 10 list of cyber threats that web service facing. SQLIA is a technique of inserting SQL meta-characters and commands into web-based input field to change the original meaning of the SQL queries in order to manipulate the execution of the malicious SQL queries to access the databases unauthorized. It unable be detected by firewall or antivirus due to the SQLIA is just injecting meta- character and do not have any malicious. Hence, forensic analysis to find out the evidence attack play an important role to making conclusion about and incident to prove or disprove intruder's guilt. Methodologies forensic analyses of web application that present previously are only simple statistical analysis, parsing capabilities or simple signature matching. Thus, we proposed a method by analyzing the URL request and decode it before analyzing with the rule set that provided by PHPIDS. After that we, cluster these attacks by calculate the distance with every cluster and cluster it with the nearest centroid point. To find the pattern of the SQL injection to cluster these attacks, we apply a method with extracting the SQL keyword as token set form URL request and analyze these request based on K-mean method to find the standard centroid to cluster these attacks.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"5 1","pages":"157-162"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71316382","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

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

EMV-based Mobile Payment Protocol for Offline Transaction - With the Ability of Mutual Authentication 基于emv的线下交易移动支付协议——具有相互认证能力

International Journal of Science and Engineering Pub Date : 2015-03-01 DOI: 10.6159/IJSE.2015.(5-1).09

羅嘉寧, 楊明豪, 何宇承

{"title":"EMV-based Mobile Payment Protocol for Offline Transaction - With the Ability of Mutual Authentication","authors":"羅嘉寧, 楊明豪, 何宇承","doi":"10.6159/IJSE.2015.(5-1).09","DOIUrl":"https://doi.org/10.6159/IJSE.2015.(5-1).09","url":null,"abstract":"The standards for Europay, MasterCard and Visa (EMV) have been widely adopted by current major financial services corporations but there are certain security threats: (1) authentication is one-way only, i.e. from a reader to a card. (2) EMV-compatible contactless smartcards do not encrypt sensitive data in the mobile transactions, which allows attackers to steal the users' personal information. (3) During offline transactions, the merchants cannot verify whether a credit card has been revoked. In 2013, Yang proposed a protocol to enhance the security of EMV standards. Yang's method can perform mutual authentication between a point-of-sale (POS) and a credit card, but the users can exceed the credits after multiple offline transactions. To improve Yang's method, we propose a new offline transaction mechanism that is compatible with the EMV standards. In our scheme, a user is required to apply for a limited and divisible credits from a bank, and stores the credits into his NFC phone's security elements (SE). During an offline transaction, the user has to send his certificate and the specific amount of credits to the merchant. The merchant verifies user's certificate, collects the credits, and redeems the payments from the bank. Our protocol is suitable for the offline environment that accommodates multiple merchants; it prevents exceeding the limitation in multiple offline transactions; and it enhances the security of EMV standards.","PeriodicalId":14209,"journal":{"name":"International Journal of Science and Engineering","volume":"5 1","pages":"61-66"},"PeriodicalIF":0.0,"publicationDate":"2015-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71316249","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