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2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER)最新文献

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Significant risk factors in construction projects: Contractor's perception 建筑工程中的重大风险因素:承包商的认知
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504337
Nurkhuraishah Abd Karim, I. A. Rahman, Aftab Hameed Memmon, N. Jamil, Ade Asmi Abdu Azis
Risk plays an important role in the success of construction project. In managing risk, identification of risk factors is very critical. Hence, this study focused on the investigation of risk factors from contractors' perspective as the contractors are key players in the success of a project. The scope of this study was limited to Batu Pahat and Muar districts only. Data were gathered using structured questionnaire survey from contractors registered with Pusat Khidmat Kontraktor (PKK). Investigations on the risk factor involved 25 common risk factors classified in five categories, which were identified through literature works. Statistical methods were used to analyse the data. Results found that the five most important risk factors in construction project are shortage of material, late deliveries of material, insufficient technology, poor quality of workmanship, and cash flow difficulties. These significant factors are from two major categories of construction and finance. The findings of this study would assist contractors in dealing with risks encountered in construction projects.
风险对建设项目的成败起着重要的作用。在风险管理中,识别风险因素是非常关键的。因此,本研究侧重于从承包商的角度调查风险因素,因为承包商是项目成功的关键参与者。这项研究的范围仅限于巴哈和茂尔县。数据是通过结构化问卷调查从在库尔德工人党注册的承包商中收集的。危险因素的调查涉及25个常见的危险因素,分为5类,通过文献作品确定。采用统计学方法对资料进行分析。结果发现,建设项目中最主要的五个风险因素是:材料短缺、材料交付延迟、技术不足、工艺质量差和现金流困难。这些重要因素来自建设和金融两大类。这项研究的结果可协助承建商处理在建筑项目中遇到的风险。
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引用次数: 53
Effect of chitosan on the formation of hydroxyapatite (HAp) coatings on titanium by electrodeposition technique 壳聚糖对通过电沉积技术在钛上形成羟基磷灰石(HAp)涂层的影响
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504418
N. Isa, Y. Mohd, N. Yury
In this study, hydroxyapatite (HAp) coatings were electrodeposited onto titanium (Ti) substrates using an aqueous solution containing 0.167 M CaCl2 + 0.1 M NH4H2PO4. The effect of chitosan on the formation of HAp coatings were investigated by adding various amount of chitosan ranging from 5 to 20 vol. %. The electrodeposition was carried out at 80 °C for 30 min under constant applied potential at − 1.5 V vs Ag/AgCl. Prior to electrodeposition, the Ti substrates were pre-treated by acid etching to remove oxide and obtain desired roughness surface. The incorporation and intermingling of chitosan in the HAp coatings reduce the amount of space found between the needlelike structures in the pure HAp coatings by ‘filling in' the space. However, excessive amount of chitosan added in the deposition solution (i.e.: 20 vol. %) caused it to compete with calcium ions to incorporate with phosphate ions and dominating the coatings. XRD patterns, FTIR spectra and EDAX analyses confirmed that the presence of chitosan in the HAp coatings. So, considering its economic and simple production, a hybrid HAp/chitosan coating is thought to be an attractive candidate for future applications as biomedical implants material.
在这项研究中,使用含 0.167 M CaCl2 + 0.1 M NH4H2PO4 的水溶液在钛 (Ti) 基质上电沉积了羟基磷灰石 (HAp) 涂层。通过添加 5 至 20 Vol. % 不等的壳聚糖,研究了壳聚糖对 HAp 涂层形成的影响。电沉积在 80 °C 下进行,持续 30 分钟,恒定施加电位为 - 1.5 V vs Ag/AgCl。在电沉积之前,对钛基底进行了酸蚀刻预处理,以去除氧化物并获得所需的粗糙度表面。在 HAp 涂层中加入壳聚糖并使其相互混合,可通过 "填充 "空间来减少纯 HAp 涂层中针状结构之间的空间。然而,在沉积溶液中添加过量的壳聚糖(即 20 Vol.%)会导致壳聚糖与钙离子竞争,从而与磷酸根离子结合,在涂层中占主导地位。XRD 图谱、傅里叶变换红外光谱和 EDAX 分析证实了壳聚糖在 HAp 涂层中的存在。因此,考虑到其经济性和简单的生产工艺,HAp/壳聚糖混合涂层被认为是未来作为生物医学植入材料应用的一个有吸引力的候选材料。
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引用次数: 2
Development of operating speed model based on urban arterial design standard traffic condition 基于城市干线设计标准交通条件的运行速度模型的建立
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504400
N. Mohamed, N. Sulaiman, M. Adnan, I. R. Endut
Road consistency modeling is used to detect any inconsistencies in road alignment, particularly horizontal and vertical alignments. Unusual features of road geometries or inconsistencies can result in unsafe driving experience due to carelessness in handling of vehicles. To help minimize the risk of accidents at curve, 85th percentile speed model is needed for Malaysian scenario to ensure its' road consistency. The current technique of identifying design speed is prone to produce inconsistencies in road design. This is because the geometric elements determined from the identified design speed are based on minimum values and although it is recommended to adopt higher values for road construction, no maximum value is set. This type of design guidelines in practice will tend to produce inconsistency in operating speed along the road roadway alignment. With that in mind, this research aims to develop models for the purpose of validating consistencies of urban road specifically horizontal alignment. As for the methodology, several methods were adopted such as spot speed study, VBOX and loop detector. After several analysis were conducted one model with R-Sq value of 74.5% is proposed as a starting basis for Malaysia.
道路一致性建模用于检测道路对齐中的任何不一致性,特别是水平和垂直对齐。道路几何形状的不寻常特征或不一致可能导致不安全的驾驶体验,因为在处理车辆时粗心大意。为了最大限度地降低弯道事故的风险,马来西亚需要85百分位速度模型来确保其“道路一致性”。目前的设计速度识别技术在道路设计中容易产生不一致。这是因为由确定的设计速度确定的几何元素是基于最小值的,虽然建议采用更高的值进行道路施工,但没有设置最大值。这种类型的设计指南在实践中容易产生沿道路道路线形的运行速度不一致。考虑到这一点,本研究旨在开发模型,以验证城市道路特别是水平路线的一致性。在方法学上,采用了点速研究、VBOX和环路检测器等方法。经过多次分析,提出了一个R-Sq值为74.5%的模型作为马来西亚的起始基础。
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引用次数: 2
Indicators of poverty and social exclusion in Malaysia: Early findings 马来西亚的贫困和社会排斥指标:早期发现
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504383
Rugayah Hashim, S. K. A. Omar, P. Saunders
The purpose of this paper is to provide preliminary insights on the demographic and economic indicators of poverty and social exclusion in Malaysia. Misled reports on similar areas were the motivation for the research project as the need to identify the hard-core poor is crucial for all stakeholders. From the initial input of 100 survey data, demographic indicators were drawn from those living in the rural areas (75%) and urban locations (25%). The findings show that income and education factors consistently fulfill the criteria under economic indicators with 100% earning incomes below RM1500 per month (equivalent to USD483.9). Furthermore, only 65% of the respondents studied up to high school hence, citizens experiencing economic hardship are in existence regardless of location. Reporting the findings of this study is significant for the government to focus on the identification of the type of development programs available to assist the disadvantage communities in Malaysia. By giving them proper training and other entrepreneurial opportunities, the government will eradicate the citizens' dependence on subsidies while ensuring that communities are socially included and not deprived on any national initiatives.
本文的目的是提供关于马来西亚贫困和社会排斥的人口和经济指标的初步见解。这一研究项目的动机是关于类似领域的误导性报告,因为确定核心贫困人口的必要性对所有利益攸关方都至关重要。从最初输入的100个调查数据中,人口指标来自生活在农村地区(75%)和城市地区(25%)的人口。调查结果显示,收入和教育因素始终符合经济指标下的标准,100%的收入收入低于每月RM1500(相当于483.9美元)。此外,只有65%的受访者读到高中,因此,经历经济困难的公民无论在哪里都存在。报告这项研究的结果对政府将重点放在确定可用于帮助马来西亚弱势社区的发展计划类型上具有重要意义。通过给予他们适当的培训和其他创业机会,政府将消除公民对补贴的依赖,同时确保社区被社会包容,不被剥夺任何国家倡议的权利。
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引用次数: 1
Wave interactions with a floating breakwater 波浪与浮动防波堤的相互作用
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504286
H. Teh, N. I. Mohammed
The present paper describes the hydraulic performance of a newly developed floating breakwater in regular waves. Laboratory tests were conducted with the aim of determining the wave transmission, reflection and energy dissipation characteristics of the breakwater model under various wave conditions. A comparison of wave attenuation ability between the present breakwater and other breakwater designs with similar geometrical criteria has been made. In addition, wave interactions with the breakwater are also explored with respect to the effect of wave steepness and water depth.
本文介绍了一种新型浮式防波堤在规则波浪中的水力性能。为了确定防波堤模型在不同波浪条件下的波浪透射、反射和能量耗散特性,进行了室内试验。本文比较了现有防波堤与其它具有相似几何准则的防波堤的消波能力。此外,波浪与防波堤的相互作用也探讨了波浪陡度和水深的影响。
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引用次数: 2
A multiple regression analysis of academic achievement, individual profile and school factors among secondary school student 中学生学业成绩、个人特质与学校因素之多元回归分析
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504370
Siti Fatimah Othman, Siti Aishah Sh Abdullah
The purpose of this study is to examine determinant factors in academic achievement of form five student in the state of Kelantan. Academic achievement was calculated based on the average grade score of SPM result. Cluster sampling was done to select twenty-eight schools with a total of 5725 form five students. Multiple regression analysis was used to explain the relationship between of academic performance, the category of schools, and the students' profiles. The demographic profile of students and school characteristics concerning the overall percentage of students from each school were analyzed, in the form of linear terms and interaction terms. Through multiple regression, gender, location, ethnic variables, and school characteristics such as percentages of poverty, male students and Malays in the schools was found to be statistically significant, at 5% level of significance, whereas Malay and Chinese factors were not significant in the form of linear term nor as well as in interaction term.
本研究的目的是研究吉兰丹州中五学生学业成绩的决定因素。学业成绩以SPM成绩的平均分计算。整群抽样选取28所学校,共5725名五年级学生。采用多元回归分析解释学业成绩、学校类别与学生素质之间的关系。以线性项和交互项的形式分析了学生的人口统计概况和每所学校的学生总体百分比的学校特征。通过多元回归,性别、地理位置、种族变量和学校特征(如贫困百分比、男学生和学校中的马来人)在统计学上显著,达到5%的显著水平,而马来人和华人因素在线性项和交互项中都不显著。
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引用次数: 0
Enhancing the heuristic evaluation (HE) by development and validation of a collaborative design measurement system (CDMS): Collaborative design and measurement system for designers and testers 通过开发和验证协同设计测量系统(CDMS)来增强启发式评估(HE):设计人员和测试人员的协同设计和测量系统
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504361
Muhammad Fahmi Bin Mazlan, A. Sivaji, Soo Shi Tzuaan, A. Lokman
Heuristic evaluation (HE) is a technique used by usability practitioners (designers and testers) based on heuristics that have been defined for the domain of the Product Under Test (PUT). One of the main problems with the HE approach is the tendency of the practitioners to reuse HE heuristics without assessing its suitability for the different product domains. The purpose of this research is to report a solution in stepwise heuristic evaluation (SHE) by development of Collaborative Design Measurement System (CDMS). This research identifies requirements to develop a CDMS by deriving Information Architecture (IA) to facilitate the SHE measurement method between tester-designer. Subsequently, this paper presents the development of CDMS and the validation of the developed solution with 30 users. The collaborative aspect of the CDMS arises as the system is targeted for both designers and testers who work in teams towards the design, development and testing phase of the product life cycle. Applying a user-centered analysis (UCA) and user-centered design (UCD) approaches, the user requirements were gathered from interviews (10 subjects), then use case diagram and information architecture (IA) were presented. This is used to develop the CDMS. The developed system was then tested using informal usability testing with 30 subjects. A mixed of positive, neutral and negative feedback were received. The results obtained from the testing revealed that the system is usable at the present state, also future improvements would take place at the next cycle of development.
启发式评估(HE)是可用性实践者(设计师和测试人员)使用的一种技术,它基于为被测产品(PUT)领域定义的启发式。HE方法的主要问题之一是,从业者倾向于重用HE启发式,而不评估其对不同产品领域的适用性。摘要本研究旨在透过开发协同设计测量系统(CDMS)来解决逐步启发式评估(SHE)的问题。本研究通过推导信息架构(IA)来确定开发CDMS的需求,以促进测试人员和设计人员之间的SHE测量方法。随后,本文介绍了CDMS的开发以及开发的解决方案在30个用户中的验证。CDMS的协作方面出现了,因为系统的目标是在产品生命周期的设计、开发和测试阶段以团队形式工作的设计人员和测试人员。应用以用户为中心的分析(UCA)和以用户为中心的设计(UCD)方法,从访谈(10个主题)中收集用户需求,然后给出用例图和信息架构(IA)。这用于开发CDMS。然后对开发的系统进行非正式可用性测试,共有30名受试者。收到的反馈有积极的、中立的和消极的。从测试中获得的结果表明,该系统在当前状态下是可用的,并且未来的改进将在下一个开发周期中进行。
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引用次数: 3
Thermal oxidation studies on methyl grafted natural rubber polymer electrolytes with paraphenylene diamine additive 添加对苯二胺的甲基接枝天然橡胶聚合物电解质的热氧化研究
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504406
A. F. Aziz, A. Ali
This work is concerned in improving the resistance against thermal oxidation of polymer electrolyte based on 30 % methyl grafted natural rubber (MG30) by adding antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD) with different weight percent between 0.5 and 8 wt.%. All samples were prepared by solution cast technique. The prepared samples were exposed under 70°C for 3 days. Fourier transform infrared spectroscopy (FTIR) spectral analysis show that MG30 with 1 wt.% of 6PPD is the most effective composition to reduce the thermal oxidation at elevated temperature. The comparative studies are performed to investigate the conductivity performance of both systems of MG30-lithium triflate salt before and after treated with 6PPD. The analysis found that the untreated sample shows better ionic conductivity at room temperature. The modulus formalism study confirms both systems are ionic conductor.
本文研究了在30%甲基接枝天然橡胶(MG30)聚合物电解质中加入不同质量分数(0.5 ~ 8wt %)的抗氧化剂N-(1,3-二甲基丁基)-N′-苯基-对苯二胺(6PPD),以提高其抗热氧化性能。所有样品均采用溶液铸造法制备。制备的样品在70℃下暴露3天。傅里叶红外光谱(FTIR)分析表明,添加1 wt.%的6PPD的MG30是降低高温热氧化最有效的成分。对比研究了mg30 -三酸锂盐经过6PPD处理前后两种体系的电导率性能。分析发现,未经处理的样品在室温下表现出更好的离子电导率。模量形式化研究证实了两种体系都是离子导体。
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引用次数: 3
An application of MEXCLP model: A case study for mobile ambulance location mexp模型在移动救护车定位中的应用
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504372
Zati Aqmar Zaharudin, N. A. Nordin, Herniza Md Tahir, C. Kamal, Nurul Hazwani Ab Ghani, Nur Hasmiera Abdul Halim
MEXCLP is a mathematical model developed by Daskin in 1983. Although this model was developed almost 30 years ago, the extension for this model is still growing. In order to determine the strategic location for mobile ambulance in Shah Alam, Selangor, Malaysia, MEXCLP model is adapted. This paper acted as our pilot study in developing a mathematical model that utilizes MEXCLP model as main references. As a result, we found that three ambulance locations, with two ambulances at each of these locations are able to cover the whole study area.
mexp是Daskin在1983年提出的数学模型。虽然这个模型是近30年前开发的,但它的扩展仍在增长。为了确定移动救护车在马来西亚雪兰莪州沙阿南的战略位置,采用了mexp模型。本文是我们以mexp模型为主要参考建立数学模型的初步研究。结果,我们发现三个救护车地点,每个地点有两辆救护车,能够覆盖整个研究区域。
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引用次数: 3
Behavior response among secondary school students development towards mobile learning application 中学生对移动学习应用发展的行为反应
Pub Date : 2012-12-01 DOI: 10.1109/CHUSER.2012.6504381
M. F. Kamaruzaman, I. H. Zainol
The evolution of mobile learning (m-learning) in the twenty first century has produced a remarkable impact on the macro education performance. Research on m-learning were conducted to fulfill the best approach to implement language learning through mobile phone, therefore English language has been chosen to be implemented as a mobile learning application to promote language learning such as idioms and vocabulary. M-Language is design to bestow students a different approach in learning English language based recreation and situation where the M-Language is pertinent. Questionnaires were distributed among the secondary school students and their responses were used to analyses the gap with a view to identify priority area for English language learning development. Therefore, this application expectantly can enhance the enthusiasm and encouragement for students' development towards English language learning through mobile.
21世纪移动学习(m-learning)的发展对宏观教育绩效产生了显著影响。对移动学习的研究是为了实现通过手机实现语言学习的最佳途径,因此选择英语作为移动学习应用程序来促进语言学习,如习语和词汇。m语言的设计是为了赋予学生一种不同的方法来学习英语,基于娱乐和情境,其中m语言是相关的。我们向中学生发放问卷,并利用他们的回答来分析差距,以确定英语学习发展的优先领域。因此,本应用程序有望提高学生通过手机学习英语的积极性和鼓励性。
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引用次数: 28
期刊
2012 IEEE Colloquium on Humanities, Science and Engineering (CHUSER)
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