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2018 Workshop on Multidisciplinary and Its Applications: Applied Mathematics, Computer Science, Information Systems, and Information Technology, WMA-Mathcomtech 2018

作者： Harahap, Astro Julida Ongko, Erianto Manurung, Hotler Kurnia, Dian Hartono, H. Abdullah, Dahlan Erliana, Cut Ita Djanggih, Hardianto Saddhono, Kundharu Rianita, Dian Setiawan, Muhammad Ikhsan Setiawan, Yuliyanto Budi Manurung, Rosida Tiurma Sriadhi, S. Sinurat, Mangasi Siregar, Aisyah Soni Hutauruk, Rapat Piter Sibarani, Nico Benjamain Department of Informatics Akademi Teknologi Industri Immanuel Medan Indonesia Department of Computer Systems Universitas Pancabudi Medan Indonesia Department of Computer Science STMIK IBBI Medan Indonesia Department of Informatics Universitas Malikussaleh Aceh Indonesia Department of Industrial Engineering Universitas Malikussaleh Aceh Indonesia Department of Law Universitas Tompotika Luwuk Banggai Indonesia Graduate Program Universitas Sebelas Maret Surakarta Indonesia Department of Administration University of Lancang Kuning Pekanbaru Indonesia Department of Civil Engineering Narotama University Surabaya Indonesia Study Program of Communication Studies Universitas Semarang Indonesia Graduate Program in Scientific Psychology Universitas Kristen Maranatha Indonesia Department of Electrical Engineering Universitas Negeri Medan Indonesia STIE Bina Karya Tebing Tinggi Indonesia

The learners' needs are an important factor in designing syllabus and materials design, this research deals with the syllabus and material design based on the professional's needs. It is expected that the syllabus and materials designes are communicatively applicable to the professional academy. Descriptive method is applied in this research. The sample of this research is 30 students of ATII Immanuel Academy Medan. They were selected by random sampling to get the data, the questioners were administered to students. the questioners consisted of 54 items and the semi structured interview consisted of 5 questions, the finding indicated that learners' needs were focused on reading and speaking skills. With reference appropriately and proportionally derived for students of the Professional Academy. Further on the basis of the syllabus, materials are designed in which the skills of using language become a priority. The results of this research will be disseminated using the website. © Published under licence by IOP Publishing Ltd.

关键词： Information systems

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Mechanical Properties of Single Shear Plane of Bolted Steel Connection

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IOP Conference Series: Materials Science and engineering 2020年第1期713卷

作者： A F Kamarudin M K Musa S N Mokhatar T N Tuan Chik S S Mohd Zuki A Abu Bakar J Hadipramana H H Ahmad Johari Jamilus Research Centre Faculty of Civil and Environmental Engineering Universiti Tun Hussein Onn Malaysia 86400 Pt. Raja Bt. Pahat Johor MALAYSIA Faculty of Technology Engineering Universiti Tun Hussein Onn Malaysia 86400 Pt. Raja Bt. Pahat Johor MALAYSIA Program Studi Teknik Sipil Universitas Muhammadiyah Sumatera Utara Jl. Muctar Basri Medan 20238 INDONESIA

A 5-storey portable steel tower based on prefabricated frame concept has been built in Jamilus Research Centre, UTHM. It is now undergoing laboratory testing for static and dynamic performance. In this study, the mechanical properties of the connections were investigated via their connection condition between elements (beam and column) and connectors. The frame elements were designed based on S275 steel grade of 77 mm x 77 mm hollow section with 3 mm thickness, and 8 mm thickness of connectors' plate. The connection was subjected to single shear plane action which fastened by bolts. Mild steel (grade 4.6) and high tension (grade 8.8) bolts with 10 mm diameter size were used. Shear, bearing and tensile strengths of the bolts and steel plates were determined via tension testing using 50 tonnes of Universal Testing Machine (UTM). From the results, all bolts and steel plates have satisfied the design strengths requirement of 640 N/mm2 (high tension bolt), 240 N/mm2 (mild steel bolt) and 275 N/mm2 as required by EN 1993-1-8. Meanwhile the ultimate shear force of bolts was found within ranges of 25% (high tension) and 12.5% (mild steel) from their respective ultimate tensile force. Bearing failure was occurred at bolt hole of 3 mm thickness of steel plate but only when it was fastened to high tension bolt. No bearing failure occurred when mild steel bolt was used. It has proven that all bolt spacing and edges distances were sufficient, without tearing failure observed in all testing. Finally, the permissible bearing resistance were checked based on the ratio of experiment against the EN 1993-1-8 relationships, when it has shown to satisfaction if the value is less than 1 as recommended by previous researcher.

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The investigation of influence ammonia concentration variations to the performance of a pump less ammonia-water absorption refrigeration system with water flooding evaporator

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AIP Conference Proceedings 2019年第1期2062卷

作者： Hendra Wijaksana I. N. S. Winaya Made Sucipta Ainul. Ghurri 1)Doctoral Study Program in Engineering Science Udayana University Kampus Jendral Sudriran Denpasar Bali-Indonesia 2)Mechanical Engineering Department Engineering Faculty Udayana University Kampus Bukit Jimbaran Denpasar Bali-Indonesia

An experimental investigation of the influences ammonia concentration variation to the performances of pump less ammonia-aqua absorption refrigeration system with water flooding evaporator is described. The heat generated in generator and refrigerating effect in evaporator, cooling capacity, coefficients of performance (COP) are investigated. The objective of this study is to investigate the characteristic and influences of the ammonia concentration variation to the performance of pump less absorption refrigeration system with water flooding evaporator as a refrigeration load.. In this research, the generator temperature has been setting constant in 80°C using electric heater, the ammonia concentration in 500 ml solution would be varied in 18%, 27%, 37%, 47%, and 59%. It is concluded that heat generated in generator and refrigerating effect in evaporator decrease with increasing ammonia concentration, while the cooling capacity and COP would increase with increasing ammonia concentration. As a result, it is found that increasing the ammonia concentration would effect on increasing of cooling capacity and COP. The highest the ammonia concentration, the highest cooling capacity and COP would be resulted. The highest cooling capacity and COP resulted respectively are 0.7180 kW and 0.829 at 59% ammonia concentration.

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Computation of Polyhedral Positive Invariant Sets via Linear Matrix Inequalities 16

Computation of Polyhedral Positive Invariant Sets via Linear...

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16th European Control Conference, ECC 2018

作者： Rubin, Daniel Nguyen, Hoai-Nam Gutman, Per-Olof Autonomous Systems Program Technion- Israel Institute of Technology Haifa Israel Control Signal and System Department IFP Energies Nouvelles Rond-point de l'Échangeur de Solaize BP3 Solaize69360 Israel Faculty of Civil and Environmental Engineering Technion- Israel Institute of Technology Haifa Israel

ISBN: (纸本)9783952426982

This paper presents a linear matrix inequality based algorithm for computation of polyhedral positive invari- ant sets for linear discrete-time systems subject to bounded state and input constraints. While the main algorithm is suitable for computation of polyhedral invariant sets of a general shape, a second algorithm specialized for symmetric sets is also presented. The results are extended to include polytopic uncertainty. Verification and demonstration of the proposed scheme is done through numerical examples. © 2018 European Control Association (EUCA).

关键词： Linear matrix inequalities

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Dualism of the Protected Areas (Holy Region) on the Purnama Beach, Gianyar - Bali

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IOP Conference Series: Earth and Environmental Science 2019年第1期366卷

作者： N P D U Ningsih R Hidayah Technical and Vocational Education Study Program Graduate School of Yogyakarta State University Indonesia Dept. of Civil Engineering and Planning Yogyakarta State University Indonesia

Purnama Beach is located along the village of Gelumpang Sukawati Village as the part of Sukawati District, Gianyar Regency. The majority of the population of Sukawati Village are Hindus who have many religious events especially related to the beach. The most frequently held ceremony at Purnama Beach is Tawur Agung Kesanga or Melasti ceremony, where Purnama Beach is used as the destination for a Melasti ceremony held by several areas around Sukawati District. The purpose of this study is (1) to identify the typology of spatial utilization in Purnama Beach area, (2) to formulate the various interests (actors) involved in Purnama Beach area, (3) to formulate the various functional changes that occur in the utilization of Purnama Beach area, (4) to identify the territories or zoning in Er Jeruk Temple, and (5) to formulate the various impacts that occur due to changes in the function of Purnama Beach area. So that this study can provide recommendations to mediate dualism conflicts in the use of sacred areas in Bali. It is expected to be useful in supporting regional spatial policies and sustainable tourism development.

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Student's Perception on Pedestrian Path Comfort in Yogyakarta State University

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IOP Conference Series: Earth and Environmental Science 2019年第1期366卷

作者： N Masyita Sativa Technical and Vocational Education Study Program Graduate School of Yogyakarta State University Indonesia Dept. of Civil Engineering and Planning Yogyakarta State University Indonesia

Pedestrian path is an important element for outdoor activities in urban environment, as well as in campus area. Yogyakarta State University (YSU) is a campus which is still in progress to develop its physical environment, includes pedestrian areas. The research aims to study student's perceptions in using pedestrian path in campus area, especially in comfort aspects (direct route, line safety, and line clarity). This study uses a descriptive qualitative method by giving questionnaires using google form application to students. As a result, it is concluded three comfort indicators of student's perception on their campus pedestrian. First, the degree of achievement for experience indicators is 70.61%; it means that the experience indicators giving a good influence on the perceptions of YSU students. Second, the indicator of attraction is 80.85%, shows a very good influence on the perception of the students. Meanwhile, indicator of expectation is 76.86%, it means that the expectation indicator giving a pretty good influence on the perception of YSU students on the comfort of pedestrian.

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The Effect of Students’ Car Access and Car use Habits on Student Behavior to Reduce using Cars for Traveling to Campus

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Procedia engineering 2017年 171卷 1454-1462页

作者： Rudy Setiawan Wimpy Santosa Ade Sjafruddin Civil Engineering Study Program Petra Christian University Siwalankerto 121-131 Surabaya 60236 Indonesia Civil Engineering Study Program Parahyangan Catholic University Ciumbuleuit 94 Bandung 40141 Indonesia Civil Engineering Study Program Bandung Institute of Technology Ganesha 10 Bandung 40132 Indonesia

This study reports an investigation of psychological factors influencing student behavior to reduce using cars for traveling to campus from the perspective of the Norm Activation Model, with the addition of students’ car access, and car use habits for traveling to campus. Students from three different university campuses completed a survey on their car commuting behavior. Results indicated that a car use habit, awareness of consequences, and ascription of responsibility explain 63% variance of personal norm. Personal norms explain 47% variance of the behavioral intention. In turn, behavioral intention, car use habit, and car access explains 54% of the variance of actual car use. A car use habit and ascription of responsibility were the strongest factors that influence personal norms, and car use habit was the strongest factors that influence actual car use behavior, while car access significantly influence car use habit and actual car use behavior. Implications of these findings are that in order to alter the use of car, universities should implement both structural and psychological intervention. To be effective interventions should be design to removing opportunities for enactment of car use habit, also to enhance the sense of responsibility towards the negative impact of car use.

关键词： Students’ car use norm activation model car access car use habit.

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Identification of alteration zones using a Landsat 8 image of densely vegetated areas of the Wayang Windu Geothermal field, West Java, Indonesia

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IOP Conference Series: Earth and Environmental Science 2019年第1期254卷

作者： Kristian Edwin Salamba Arie Naftali Hawu Hede Mohamad Nur Heriawan Mining Engineering Study Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Earth Resources Exploration Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jl. Ganesha No.10 Bandung West Java 40132 Indonesia.

Remote sensing is a method usually used for conducting geothermal reconnaissance surveys by mapping surface alteration anomalies, which are captured by a satellite sensor. This study analyzes the characteristics of the surface alteration zones in the Wayang Windu geothermal field (WWGF). It employs a remote sensing method using multispectral Landsat 8 imagery and is validated by ground truth data from field surveys. The WWGF is located in Pangalengan, West Java with an elevation of 1500-2600 m.a.s.l., and lies in a quaternary volcanic arc. The rock types in Wayang Windu consist of andesite, basalt, tuff, breccia, and pumice. Fractures and faults are identified as lineaments in this area and based on their structures, were directed to be oriented northwest-southeast and northeast-southwest. This research combined a field survey and remote sensing methods to enhance the spatial data. Field surveys yield 18 spots for obtaining soil samples and laboratory analyses were performed. Spectral reflectance analysis was performed to determine the reflectance and mineral composition of the samples, X-ray diffraction was performed to determine the mineral composition, and X-ray fluorescence was performed to determine the abundance of elements. A scene from Landsat 8 image acquired on September 10, 2013 was evaluated using a principal component analysis-based method. The surface alteration zones in the WWGF correlated with joints and faults. Based on the mineral composition, the surface alteration zones in WWGF were identified as advanced argillic zone with the occurrence of secondary minerals such as cristobalite and halloysite, and a propylitic zone with the occurrence of secondary minerals such as epidote and chlorite.

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Thermal design of 5 kg capacity coffee bean dryer simulator using Geothermal energy

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IOP Conference Series: Earth and Environmental Science 2019年第1期254卷

作者： J Hendrarsakti M R Firmansyah Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Geothermal Study Program Institut Teknologi Bandung Jl. Ganesha 10 Bandung Indonesia

A coffee bean dryer simulator that would be able to fully simulate the whole process of coffee bean drying using heat recovered from geothermal energy source has been thermally designed. This simulator is planned to educate people living near the geothermal resources or power plants about the direct use of geothermal energy, especially in coffe drying. The maximum capacity of this simulator is 5 kilogram of fresh coffee bean that is dried using hot air at 45°C and mass flow rate of 0,23 kg/s. The duration of drying is about 3000 seconds which should be adequate to represent the drying process. The heat exchanger proposed for this thesis is a compact heat exchanger with staggered pipe arangement. The total number of pipes is 10 pipes at 36 cm in length and 65 flat plate alluminium fins measured at 0,6m x 0,16m x 0,005m. The fin efficiency value and the overall surface efficiency value are 72% and 73% respectively.

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Identification of critical location for enhancing groundwater recharge in Kathmandu Valley, Nepal (vol 9C, 100253, 2019)

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GROUNDWATER FOR SUSTAINABLE DEVELOPMENT 2019年 9卷

作者： Dahal, Anjana United Nations University Institute for the Advanced Study of Sustainability 5–53–70 Jingumae Shibuya-ku Tokyo 150-8925 Japan Department of Civil and Environmental Engineering School of Environment and Society Tokyo Institute of Technology 2-12-1-M1-4 Ookayama Meguro-ku Tokyo 152-8552 Japan Faculty of Science and Technology Pokhara University Pokhara-30 Lekhnath Kaski P.O. Box: 427 Nepal

The urbanization and construction of modern infrastructure lead to the increase in surface runoff and decrease in infiltration . Groundwater is one of the most important water sources in the Kathmandu Valley, Nepal. The amount of groundwater extraction over the years has been greater than the natural replenishment capacity, as a result the water table has significantly decreased. This study mainly aims to identify critical locations for groundwater recharge . The land covers in 1996 and 2011 were generated based on Landsat satellite image with a 30 × 30 m resolution. The 2030 land cover was modeled with a land change modeler, The Arc-Curve number tool was used to calculate the curve number (CN). Runoff was calculated with the SCS runoff equation. Compared to that in 1996, the forest and agriculture area in 2011 decreased, whereas the vegetation and built-up areas increased. From 2011 to 2030, no changes in forest, decrease in vegetation and agriculture area, and increase in the built-up area are observed. The water area throughout the study periods is less than 0.2%. The city center of Kathmandu Valley has higher CN, greater than 85, for all the observed periods, as a result, a higher runoff is observed. The weighted average CNs are 63 and 65 for 2011 and 2030, respectively. The northern and southern parts of Kathmandu Valley has lower CNs; hence, the lower runoff and possibly higher infiltration indicate critical locations for the groundwater recharge. The northern area includes, Lapsephedi, Gagalphedi, Nayapati, Sundarijal, Chapali, Bhadrakali, Budalinilkantha, and Baluwa and southern area includes Devichour, Nallu, Bhardv, and Godawari.

关键词： Curve number GIS Groundwater Kathmandu valley Land cover SCS runoff

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