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An Empirical Research on Pilgrims Wayfinding Satisfaction Study: A Consideration for Improving Wayfinding Experience in Al Masjid Al Haram 朝圣者寻路满意度的实证研究——对改善清真寺寻路体验的思考
IF 0.5 Pub Date : 2020-12-29 DOI: 10.24003/emitter.v8i2.585
Al Haram, Abdullah Basiouni
Millions of Muslims visit Makkah Al-Mukarramah every year for Hajj and Umrah. It is a mandatory part of both Hajj and Umrah rituals to visit Al Masjid Al Haram for various activities. Huge crowds and lack of prominent wayfinding signs make Hajis spend more time inside Haram trying to find their way that too in a tense and panicky state of mind. This paper aims at assessing the gravity of wayfinding associated challenges faced by Hajis by applying the well-known Customer Satisfaction Model and proposing possible solutions to minimize potential adverse effects. Convenience sampling was used to collect the data from the proposed sample size of 2000 from various nationalities and regions. A total of 618 responses were received. The structural equation modeling (SEM) method was used for path analysis using AMOS 21 analytical tool and results revealed a reasonable fit between data collected and the model used: chi2 (485.95), chi2 / DF (3.77), RMSEA (0.07), CFI (0.92), and all values of Cronbach's alpha are greater than 0.78. The results substantiated that Hajis face problems in wayfinding inside Haram, which leads to Hajis finding it challenging to navigate in the Haram area. When the respondents were presented with alternative solutions to improve their wayfinding inside Haram, the results showed a statistically significant improvement in the satisfaction level.
每年都有数百万穆斯林前往麦加参加朝觐和朝圣。前往清真寺参加各种活动是朝觐和朝圣仪式的强制性组成部分。巨大的人群和缺乏明显的指路标志使得哈吉教徒在圣地内花费更多的时间,试图在紧张和恐慌的精神状态下找到自己的路。本文旨在通过应用著名的客户满意度模型来评估Hajis面临的寻路相关挑战的严重性,并提出可能的解决方案,以尽量减少潜在的不利影响。采用方便抽样的方法,从不同民族和地区的2000个建议样本量中收集数据。我们共收到618份回应。采用结构方程建模(SEM)方法,利用AMOS 21分析工具进行通径分析,所得数据与模型拟合良好:chi2(485.95)、chi2 / DF(3.77)、RMSEA(0.07)、CFI (0.92), Cronbach’s alpha值均大于0.78。调查结果证实,哈吉教徒在圣地内部的寻路存在问题,这导致哈吉教徒发现在圣地地区导航很困难。当被调查者被提供替代解决方案来改善他们在Haram内部的寻路能力时,结果显示满意度在统计上有显著提高。
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引用次数: 0
Design of Zero Voltage Switching Boost DC-DC Converter Using Bond Graph Model 基于键图模型的零电压开关升压DC-DC变换器设计
IF 0.5 Pub Date : 2020-12-29 DOI: 10.24003/emitter.v8i2.519
Shaik Hussain Vali, R Kiranmayi
The research in power supply design is moving towards improving efficiency by reducing losses. Another aspect of research in power converters is its modeling as it involves multiple domains such as electrical, mechanical, magnetic...etc. bond graph modeling is suitable for the multi domain systems. Here, a zero voltage switching boost converter is designed using its bond graph model. The bond graph simulated results which are done in MATLAB/SIMULINK are matched with the experimental results. The efficiency of the ZVS boost converter is calculated and is compared with the efficiency of conventional pulse width modulated (PWM) boost converter.
电源设计的研究正朝着通过减少损耗来提高效率的方向发展。电源变换器研究的另一个方面是其建模,因为它涉及多个领域,如电、机械、磁等。键合图建模适用于多域系统。本文利用键图模型设计了零电压开关升压变换器。在MATLAB/SIMULINK中进行的键合图仿真结果与实验结果吻合较好。计算了ZVS升压变换器的效率,并与传统脉宽调制(PWM)升压变换器的效率进行了比较。
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引用次数: 0
Perfomance Comparison of Genetic and Greedy Algorithms in Underlay Device-to-Device Communication 遗传算法与贪心算法在底层设备间通信中的性能比较
IF 0.5 Pub Date : 2020-12-29 DOI: 10.24003/emitter.v8i2.566
S. Pratiwi, Arfianto Fahmi, Vinsensius Sigit Widhi Prabowo
The number of cellular users (CU) continues to increase in Indonesia. This impacts a large network load for the number of devices connected to the main network so it will have an impact on the quality of service. Device-to-Device (D2D) communication as components for LTE-A technology enabling a direct wireless link between the CUs without routing the data via the evolved Node B (eNB) signal or the core network. The need for algorithm and power control used to allocate radio resources so it can get a good quality of service because of communications technology D2D. In this study, we analyze and compare the performance parameters of D2D communication systems, including system interference, system sum-rate, system spectral efficiency, total energy system, and system energy efficiency based on Genetic and Greedy Algorithms in allocating radio resources and controlling the power of users. The genetic algorithm works with three operators in allocating resource block (RB), including proportional selection, crossover, and mutation. This process is repeated many times to produce several generations so that the best allocation can be got. The genetic algorithm has a flexible number of D2D and cellular communications in several RBs, minimum signal to interference plus noise ratio (SINR) also considered for mobile communication in ensuring the quality of its services. Numerical evaluations demonstrate the superior performance of the Genetic Algorithm in terms of system power, energy efficiency, and interference mitigation. As repetition gets larger, the Genetic algorithm results in better spectral efficiency.
印度尼西亚的移动电话用户(CU)数量继续增加。这将影响连接到主网络的设备数量的大量网络负载,因此它将对服务质量产生影响。设备到设备(D2D)通信作为LTE-A技术的组件,可在cu之间实现直接无线链路,而无需通过演进的节点B (eNB)信号或核心网络路由数据。由于D2D通信技术的发展,需要使用算法和功率控制来分配无线电资源,使其能够获得良好的服务质量。在本研究中,我们分析和比较了基于遗传和贪婪算法的D2D通信系统在无线电资源分配和用户功率控制方面的性能参数,包括系统干扰、系统和速率、系统频谱效率、系统总能量系统和系统能量效率。遗传算法在分配资源块时采用比例选择、交叉和变异三种操作。这个过程重复多次,产生几代,以获得最佳分配。遗传算法在若干RBs中具有灵活的D2D和蜂窝通信数量,最小信噪比(SINR)也被考虑用于移动通信,以确保其服务质量。数值评估表明,遗传算法在系统功率、能源效率和干扰抑制方面具有优越的性能。随着重复次数的增加,遗传算法具有更好的频谱效率。
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引用次数: 0
Justifications for using interactive online education 使用互动式在线教育的理由
IF 0.5 Pub Date : 2020-12-25 DOI: 10.14419/ijet.v10i1.31251
Zaid Yacoub Abu-Bajeh, Rabab Alayham Abbas
The world is currently witnessing a renaissance of knowledge that can be described as the information era, the Educational environments became increasingly diverse, therefore, the institutions working in the educational field, are constantly seeking to create an efficient educational process to communicate knowledge to learners by the best possible ways and providing methods that aim to achieve the participation and create a link between the teacher and learners within the teacher guidance, in proportion to technological changes in the educational systems, where online education has undergone major changes in the organizational method of teaching. This prompts to focus on feedback as critically important in the educational process. The amount and type of interaction and feedback between the teacher and the learners depend on the link used; it is difficult to read "body language" of the learners over an audio link or recorded video, so the success of feedback process depends on face-to-face communication. This paper presents models of online education, and provides justifications for using interactive online education, and explains that there is a need for more researches in this field and take an active role in evaluating, selecting, and integrating tools and services that emphasize more teaching interactions.  
当今世界正经历着知识的复兴,可以说是信息时代,教育环境变得越来越多样化,因此,在教育领域工作的机构不断寻求创造一个有效的教育过程,以最好的方式向学习者传播知识,并提供旨在实现参与的方法,并在教师指导下建立教师和学习者之间的联系。与教育系统的技术变革成比例,其中在线教育在组织教学方法上发生了重大变化。这促使我们关注反馈,认为反馈在教育过程中至关重要。教师和学习者之间互动和反馈的数量和类型取决于所使用的链接;通过音频链接或录制的视频很难读懂学习者的“肢体语言”,因此反馈过程的成功取决于面对面的交流。本文介绍了在线教育的模式,并提供了使用交互式在线教育的理由,并解释了在这一领域有必要进行更多的研究,并在评估、选择和整合强调更多教学互动的工具和服务方面发挥积极作用。
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引用次数: 0
Wood-steel composite shear walls with openings 带开口的木钢复合剪力墙
IF 0.5 Pub Date : 2020-12-25 DOI: 10.14419/IJET.V10I1.31255
Tzanetis Vogiatzis, T. Tsalkatidis, A. Avdelas
This paper reports an investigation into the behaviour of wood-steel composite shear walls, consisting of strand laminated lumber boundary frames with infill steel plates. Recently it has been shown that wood-steel composite shear wall systems can offer various advantages over code-approved wood frame shear walls, including architectural flexibility. However, further research is needed so as to gain a better insight and understanding into the structural behaviour of this lateral load resisting system. On this basis, three-dimensional full-scale finite element models are developed and used to simulate the wood-steel composite shear wall with solid infill plates and with centrally-perforated infill plates. In this paper, firstly, a three-dimensional finite element model of wood-steel composite shear wall under monotonic loading. The numerical results were compared with experimental data and it was found that the model can predict the behaviour of wood-steel composite shear walls with reasonable precision. Using the verified model, a parametric study on wood-steel composite shear wall models with and without openings was performed. Critical parameters influencing the wood-steel composite shear walls behaviour such as the thickness of the steel plate and the opening ratio were investigated. The results of this parametric study provide useful information for the engineering application of wood-steel composite shear wall systems.  
本文报道了一项调查的行为木-钢组合剪力墙,由钢绞线层压木材边界框架与填充钢板。最近有研究表明,木-钢复合剪力墙系统比经规范批准的木框架剪力墙具有各种优势,包括建筑灵活性。然而,为了更好地洞察和理解这种抗侧荷载体系的结构行为,还需要进一步的研究。在此基础上,建立了三维全尺寸有限元模型,对实心填充板和中心穿孔填充板的木-钢组合剪力墙进行了数值模拟。本文首先建立了单调荷载作用下木钢组合剪力墙的三维有限元模型。将数值计算结果与试验数据进行比较,发现该模型能较好地预测钢木组合剪力墙的受力性能。利用验证的模型,对有无开口的木-钢组合剪力墙模型进行了参数化研究。研究了影响木-钢组合剪力墙性能的关键参数,如钢板厚度和开口比。该参数化研究结果为木钢组合剪力墙体系的工程应用提供了有益的信息。
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引用次数: 2
Face Recognition System for Prevention of Car Theft with Haar Cascade and Local Binary Pattern Histogram using Raspberry Pi 基于树莓派的Haar级联和局部二值模式直方图人脸识别系统
IF 0.5 Pub Date : 2020-12-20 DOI: 10.24003/emitter.v8i2.534
M. Abdurrahman, Haryadi Amran Darwito, Akuwan Saleh
In this era, the occurrence of vehicle theft has become a fairly frequent problem, especially in big cities like Jakarta and Surabaya. Although the technology for car security is very sophisticated (e.g. keyless system), but there are many cases that thieves still can break into the system. Once a car was stolen, the whereabouts of the car was unknown and the thief was on the loose. The goal of this research is to overcome this problem. As a device, this research works on Raspberry Pi 3 that connected with the Raspberry Pi Camera. Using the OpenCV library, with the Haar Cascade method for face detection, and Local Binary Pattern Histogram for face recognition. The device must be connected to the internet in order to send the information using a Telegram message. The research results show the success of the device system in face-recognizing between the car owner and car thief with optimal conditions in the morning until the afternoon with the light intensity around 660 to 1000 lux, and best recognizing distance at 50 cm. The success rate for obtaining the car’s location for the outdoor condition is 100%. Even if there is a slope or an error data, it can be tolerated because the difference was not too high, about 0.1-1.0 m.
在这个时代,车辆盗窃的发生已经成为一个相当频繁的问题,特别是在雅加达和泗水这样的大城市。虽然汽车安全技术非常先进(如无钥匙系统),但在很多情况下,小偷仍然可以闯入系统。一旦汽车被盗,汽车的下落不明,小偷逍遥法外。本研究的目的就是要克服这个问题。作为一种设备,本研究工作在与树莓派相机连接的树莓派3上。使用OpenCV库,用Haar级联法进行人脸检测,用局部二值模式直方图进行人脸识别。该设备必须连接到互联网,才能使用电报信息发送信息。研究结果表明,该设备系统在上午至下午的最佳光照强度为660 ~ 1000勒克斯,最佳识别距离为50厘米的情况下,成功实现了车主与偷车贼之间的人脸识别。获取室外条件下汽车位置的成功率为100%。即使有斜率或误差数据,也可以容忍,因为差异不是太高,约0.1-1.0 m。
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引用次数: 3
Load Frequency Control of Three area Multi-Unit Deregulated Power System with FOSMC and Performance analysis using Regulation constant 基于FOSMC的三区多机组无调节电力系统负荷频率控制及调节常数性能分析
IF 0.5 Pub Date : 2020-12-20 DOI: 10.24003/emitter.v8i2.532
Kurakula Vimala Kumar, G.Sritej, V.Ganesh
This paper presents three area multi-unit Deregulated Power System (DPS) for Load Frequency Control (LFC) using Fractional Order Sliding Mode Controller (FOSMC) along with Thyristor Controlled Phase Shifters (TCPS) and Superconducting Magnetic Energy Storage (SMES) combination. The FOSMC can be used to overcome nonlinearities and uncertainties of the system for bilateral and unilateral transactions under different Step Load Perturbations (SLPs). The deregulated power system performance is analyzed for different Regulation constants (R) such as 1.8, 2.4 and 3.0. For stabilization of oscillations in frequency and to stabilize the deregulated power system dynamically for different SLPs, TCPS is incorporated with the tie line in series and SMES is used as an energy storage unit. The dynamic responses of LFC problems have been simulated and analyzed with MATLAB/Simulink-based computer simulations. Further simulation results have also been tabulated as a comparative performance with respect to peak overshoot and settling time. 
本文提出了一种采用分数阶滑模控制器(FOSMC)、晶闸管控制移相器(TCPS)和超导磁能存储(SMES)相结合的三区多机组负荷频率调节电力系统(DPS)。FOSMC可用于克服系统在不同阶跃载荷扰动下的双边和单边交易的非线性和不确定性。分析了不同调节常数(R) 1.8、2.4和3.0时电力系统的解除管制性能。为了稳定频率振荡和动态稳定不同slp下的失稳电力系统,将TCPS串联到并网线路中,并将SMES作为储能单元。利用MATLAB/ simulink对LFC问题的动态响应进行了仿真和分析。进一步的模拟结果也被制成表格,作为关于峰值超调和稳定时间的比较性能。
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引用次数: 0
Material comparison of dynamic cornering fatigue test (iso3006) for automotive wheel rim 汽车轮辋动态转弯疲劳试验(iso3006)材料比较
IF 0.5 Pub Date : 2020-12-18 DOI: 10.14419/IJET.V9I4.31206
F. Bagherzadeh, S. Murugesan, Priyam Deka
With the technological advancement in the automotive sector, the vehicles are crossing their limits in every aspect. Hence, the subsequent improvement related to the wheel and braking of the vehicle is very crucial as the wheel carries the whole weight of the vehicle in dynamic and harsh environmental conditions. ISO-3006 is a comprehensive test for wheel standardization, and the dynamic cornering fatigue test is a part of this standard. This test investigates the wheel fatigue under bending torque. When a car turns, the bending moment is applied to the wheel via drive axle. In this paper, we investigate the test on a designed wheel with five different materials via ANSYS software. As the wheel weight has a direct impact on vehicle performance, selecting lighter materials is extremely important. The result of this research indi-cates the area of maximum fatigue stresses, and also it provides a comparison between five popular materials for the wheel rim considering the fatigue life and weight of the wheel. Finally, it is shown that carbon fiber reinforced plastic (CFRP) has the most fatigue strength con-cerning its lightweight.
随着汽车行业的技术进步,汽车在各个方面都在超越自己的极限。因此,由于车轮在动态和恶劣的环境条件下承载着车辆的全部重量,因此,后续与车辆车轮和制动相关的改进非常关键。ISO-3006是车轮标准化的综合试验,动态转弯疲劳试验是该标准的组成部分。本试验研究了车轮在弯曲扭矩作用下的疲劳。当汽车转弯时,弯矩通过驱动桥作用于车轮。本文利用ANSYS软件对设计的五种不同材料车轮进行了试验研究。由于车轮的重量直接影响到车辆的性能,因此选择更轻的材料是非常重要的。研究结果表明了最大疲劳应力区域,并在考虑车轮疲劳寿命和车轮重量的情况下,对常用的五种轮辋材料进行了比较。结果表明,碳纤维增强塑料(CFRP)在轻量化方面具有最高的疲劳强度。
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引用次数: 1
Developing Shooter Game Interaction using Eye Movement Glasses 利用眼动眼镜开发射击游戏互动
IF 0.5 Pub Date : 2020-06-12 DOI: 10.24003/emitter.v8i1.509
Abdullah Iskandar, A. Basuki, A. Nurindiyani, Faris Rasyadi Putra, Mohamad Safrodin
A quadriplegic is a paralysis that affects limitations in some physical movements and psychological disorders. They have limited media to interact with computers so a suitable solution is needed in the form of a media that can recognize other body parts movements which in this research uses eye movement. one of the solutions to this problem is to propose alternative technologies to interact and play games. We propose a simple technique by using a camera mounted on the glasses that will take the eye area. This technique will help reduce unnecessary parts of eye detection so that performance increases. The eyes will be processed using basic image processing and then determined the center position of the pupil using the Mean method. This system consists of pupil movements for pointer motion control and blinking of eyes for shooting. The performance test of this method toward the system, which has used 10 people with 7 experiments, shows an accuracy of 84.86 percent, the speed of movement with a duration of 2.22 seconds and the speed of response blinking with a duration of 0.026 seconds. In addition, we can distinguish between intentional blink and unintentional blink in which intentional blink has a duration of 0.30 seconds and unintentional 0.12 seconds. It can be concluded that by using this method and this technique is able to achieve good accuracy and also able to use intentional blink as shoot trigger.
四肢瘫痪是一种影响某些身体运动限制和心理障碍的瘫痪。他们与计算机互动的媒介有限,因此需要一种合适的解决方案,以一种能够识别其他身体部位运动的媒介的形式,在本研究中使用眼球运动。解决这一问题的方法之一是提出互动和玩游戏的替代技术。我们提出了一种简单的技术,即使用安装在眼镜上的相机来拍摄眼睛区域。这项技术将有助于减少不必要的部分的眼睛检测,从而提高性能。首先对眼睛进行基本的图像处理,然后用Mean方法确定瞳孔的中心位置。该系统由瞳孔运动控制指针运动和眨眼射击组成。该方法对系统进行了10人7次实验的性能测试,准确率为84.86%,运动速度持续时间为2.22秒,反应速度持续时间为0.026秒。此外,我们可以区分有意眨眼和无意眨眼,其中有意眨眼的持续时间为0.30秒,无意眨眼的持续时间为0.12秒。结果表明,采用这种方法和技术可以达到较好的射击精度,并且可以使用故意眨眼作为射击触发器。
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引用次数: 1
Lean management implementation difficulties, studies and recommendations 精益管理实施难点、研究与建议
IF 0.5 Pub Date : 2020-06-04 DOI: 10.14419/IJET.V9I2.30178
Mohammed Jouhri, A. Soulhi
Speeding up FAST FASHION development cycles for the apparel industry, always bringing more values to the customer, seeking perfor-mance through continuous improvement. This paper presents a deployment approach to Lean Management, helping to make it more con-crete, efficient, less theoretical. The realization of the approach was based on case studies, state of art and references made in Moroccan companies in the textile and clothing sector. This analysis sheds light on the importance of aligning the lean management strategy with the company's strategy and values, hence the use of the socio-technical approach. The objective of this study is to realize a brief application of Lean Management, able to transform it from a theoretical organization to a practical one. This Lean Deployment Study is considered unique in that it addresses the need to work on psychology, culture, societal values of each company, to prepare for and align it with Lean manage-ment strategy, before attacking its practices. This article is a first development of strategies and methodologies proposed for improvements that seek to focus on the overall performance of the company. 
为服装行业加速FAST FASHION开发周期,始终为客户带来更多价值,通过持续改进寻求业绩。本文提出了精益管理的部署方法,有助于使其更具体,更有效,更少的理论。这一办法的实施是根据摩洛哥纺织和服装部门公司的个案研究、最新技术和参考资料。这一分析揭示了精益管理战略与公司战略和价值观保持一致的重要性,因此使用了社会技术方法。本研究的目的是实现精益管理的简要应用,使其从理论组织转变为实践组织。这个精益部署研究被认为是独特的,因为它解决了每个公司的心理、文化、社会价值观的工作需要,在攻击其实践之前,为精益管理战略做好准备并使其与精益管理战略保持一致。本文是第一个发展的战略和方法提出的改进,寻求关注公司的整体绩效。
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引用次数: 0
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