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1st Workshop on Environmental Science, Society, and Technology, WESTECH 2018

作者： Nurdin Abdullah, Dahlan Fatimah, Widia Ratnadewi, R. Kurniasih, Nuning Rianita, Dian Riasti, Berliana Kusuma Sofian, Edi Karnadi, Very Liantoni, Febri Kurnia, Dian Ade Cahyanto, Triawan Adi Rahman, Arief Aulia Sudarsana, I Ketut Department of Informatics Universitas Malikussaleh Aceh Utara Indonesia Electrical Engineering Universitas Kristen Maranatha Bandung Indonesia Faculty of Communication Sciences Library and Information Science Program Universitas Padjadjaran Bandung Indonesia Department of Administration University of Lancang Kuning Pekanbaru Indonesia Department of Informatics Engineering Universitas Sebelas Maret Surakarta Indonesia Faculty of Economics Universitas Islam Sumatera Utara Medan Indonesia Department of Informatics Engineering University of Putera Batam Batam Indonesia Department of Informatic Faculty of Information Technology Institut Teknologi Adhi Tama Surabaya Indonesia Departement of Information Technology STMIK IKMI Cirebon Indonesia Department of Informatics Engineering Faculty of Engineering University of Muhammadiyah Jember Indonesia Department of Mathematics STKIP Bina Bangsa Meulaboh Meulaboh Indonesia Department of Religious Education Institut Hindu Dharma Negeri Denpasar Indonesia

Security is an important aspect in communicating using information technology. SMS is a service provided by mobile phones to communicate by sending short messages quickly and cheaply. Short message delivery is done by SMS network, so the messages are not sent directly to the destination mobile phone. Therefore the messages that are sending by the SMS service need to be protected, so the security of the messages sent to the SMS network remains protected by its confidentiality. In this study the software will be built to improve the security of messages on SMS communication. The software that is built serves to encrypt messages that will be sent and decrypt messages with entered through the SMS service. Software built using the 3DES (Triple Data Encryption Standard) algorithm. The 3DES algorithm is a flow algorithm (block cipher) which belongs to the type of symmetry key cryptography system. The implementation of the 3DES algorithm on software that is built using the Java-based programming language Java. So only software that uses the Android operating system can use this encryption and decryption application. © Published under licence by IOP Publishing Ltd.

关键词： Android (operating system)

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Risk Mitigation Strategies on Supply Chain PT. X

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IOP Conference Series: Materials Science and engineering 2020年第1期847卷

作者： S P D Kristiana C W Oktavia R Magdalena M A Lilajati Industrial Engineering Study Program Faculty of Engineering Atma Jaya Catholic University of Indonesia Jakarta Indonesia

Every supply chain activity in a company is not separated from risk, therefore risk management in a company is strongly required for risk handling. PT. X is a manufacturing company that produces food flavors. Dependence with suppliers and consumers causes uncertainty in the company's supply chain flow. This uncertainty can lead to adverse effects called risk. Risk can be minimized by carrying out risk management. This study aimed to design a risk management by identifying risk events from the company's business processes based on Supply Chain Operation Reference (SCOR), to determine the causes of priority risks and then identifying risk mitigation strategies using House of Risk stage 1 (HOR1), and ranking risk mitigation strategies by considering company criteria in determining risk mitigation strategies using the Analytical Hierarchy Process (AHP). From the results of the study, 21 risk events dan 13 priority risk causes' identified, and 9 risk mitigation strategies' determined. Risk mitigation strategies' rank sequentially were conducting briefings and evaluations every day, coordinating with suppliers continuously, making signboards at the warehouse, tightening the implementation of Standard Operating Procedures (SOP), providing ongoing training, evaluating supplier performance, monitoring more frequently, demand management with considering safety stock and service levels, and had supplier reserves. So, this study suggests PT.X to implement the risk mitigation strategies for minimizing the risks in the company.

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The treatment of Raw Water Sources of Drinking Water using Chitosan/Mg/Al–LDH Composites: Problem cases in Municipal Waterworks in Banjarmasin

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IOP Conference Series: Earth and Environmental Science 2020年第1期506卷

作者： C Irawan M W Ramadhan I F Nata M D Putra Chemical Engineering Study Program Engineering Faculty Lambung Mangkurat University Banjarbaru South Kalimantan Indonesia

A study was done on treatment of raw water sources for drinking water using chitosan/Mg-Al LDH (CS/Mg/Al–LDH) composites by adsorption process. An analysis on the adsorbent characterizations of FTIR, SEM and XRF showed that the CS/Mg/Al–LDH had many different functional groups and a high specific surface area for adsorption processes. The CS/Mg/Al–LDH showed high adsorption uptake capacity and selectivity for iron (Fe), turbidity, and colour in the raw water sources for drinking water in Municipal Waterworks in Banjarmasin. Therefore, the CS/Mg/Al–LDH composites have the potential to be used as an adsorbent in water and wastewater treatment.

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Load-Displacement Response of Oil Palm Shell Concrete Compressive Test Using Digital Image Correlation

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IOP Conference Series: Earth and Environmental Science 2020年第1期498卷

作者： Fajri Fathur Rahman Widjojo Adi Prakoso Elly Tjahjono Bastian Okto B. Sentosa Mulia Orientilize Student of Civil Engineering Study Program Faculty of Engineering Universitas Indonesia Depok Indonesia Civil Engineering Department Faculty of Engineering Universitas Indonesia Depok Indonesia

study of compressive strength of oil palm shell (OPS) concrete has been conducted by varying the content of admixture of silica fume and fly ash to increase concrete strength. Digital Image Correlation (DIC) was used as a tool to capture the physical change of concrete cube during the test which can be converted to load-displacement response by using open source sotware, Ncorr. It is evident that DIC can be carried out with ordinary camera DSLR which reveal from test result. Poison's ratio as a ratio between lateral and vertical displacement is succesly obtained. The value are between 0.2096 to 0.2264. Concrete strength improved by 30% to 43% by adding the admixture, silica fume and fly ash.

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Wireless Disturbance Mapping and Path Selection for Placement of Network Control System Components 2

Wireless Disturbance Mapping and Path Selection for Placemen...

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2nd International Conference on Mechanical, Electronics, Computer, and Industrial Technology, MECnIT 2018

作者： Joelianto, Endra Ghazali, Muhammad Zhaka Juhana, Tutun Instrumentation and Control Research Group Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Telecommunication Engineering School of Electrical and Informatics Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Wireless transmitters in measurement instruments act for transmitting data or signals using radio frequency or currently better known as WIFI by means of 2.4 GHz. WIFI is a wireless local area network (WLAN) communication network. With the existence of telecommunications, measurement and control in industrial processes are heading to a high level of reliability compared to the conventional wired instruments in reaching hard locations or dangerous and hazardous areas. However, this cannot be done easily especially in maintaining the communication performances. Research is needed on the reliability of the wireless transmitter itself. Several factors such as communication disruptions are new challenges for the industry of wireless technology manufacturers to be able to prevent or to minimize errors that can arise in wireless network control systems. Signal strength mapping is needed in designing wireless network control systems. In this paper, the mapping is performed by measuring the signal strength parameters (Power Level) and the use of channels (Channel Usage) at planned locations. The measurement results are then used as sample points in the mapping. Data show that the signal strength measurement at each channel has a maximum of - 60 dBm and a minimum of -105 dBm. Mapping is performed by using two methods, namely Inverse Distance Weight (IDW) and Spline Interpolation (SI) methods. The paper proposes an algorithm to select the appropriate wireless communication paths from the planned locations. The mapping results indicate the appropriate area to place the transmitter and the receiver devices in a wireless data transmission network. With good placement, it is expected that measurements using wireless transmitters have minimum disruptions. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Mapping

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The Use of Geogebra Software in Learning Geometry Transformation to Improve Students' Mathematical Understanding Ability

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Journal of Physics: Conference Series 2020年第4期1477卷

作者： Moch. Rasyid Ridha Euis Eka Pramiarsih Widjajani Mathematic Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Economic Education Study Program Faculty of Teacher Training and Education Universitas Langlangbuana Bandung Indonesia Industrial Engineering Study Program Faculty of Engineering Universitas Langlangbuana Bandung Indonesia

This article reports the findings of one pretest-posttest design experiment with the control group and with GeoGebra software learning application to examine the mathematical understanding abilities and responses of students taking Geometry Transformation course. The subjects of this study were 24 students of mathematics education study program in Universitas Langlangbuana. The research instrument consisted of a mathematical comprehension ability test and a student response questionnaire. Based on data analysis using SPSS 2.0.0 and Microsoft Excel 2013, the study found that achievement and improvement in mathematical understanding skills and responses of students who received learning with GeoGebra software were better than achievement and improvement in student's ability who obtain conventional approach for the high, middle and low categories. The study also found a moderate relationship between mathematical understanding ability and student response.

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Conservation Management of Agriculture Land using Geospatial Approach (A Case study in the Bone Watershed, Gorontalo Province, Indonesia) 2

Conservation Management of Agriculture Land using Geospatial...

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2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Maryati, Sri Eraku, Sunarty Kasim, Muh Geography Education Study Program Department of Earth Science and Engineering Faculty of Mathematics and Natural Sciences Universitas Negeri Gorontalo 96128 Indonesia Engineering Geology Study Program Department of Earth Science and Engineering Faculty of Mathematics and Natural Sciences Universitas Negeri Gorontalo 96128 Indonesia

Bone Watershed is one of the major watersheds in Gorontalo Province. Bone watershed has a very important role for the people of Gorontalo Province. The role of Bone Watershed is mainly related to the providing clean water, producing oxygen, controlling flood, providing habitat for endemic flora fauna and other environmental functions. The role of Bone Watershed for the community's economic sector is also very important, the Bone watershed provides livelihood for surrounding communities includes fertile land resources for agriculture and plantations, forest products, and livestock feed. This research is important considering the Bone watershed has limited availability of land for agriculture and the high risk of natural disasters such as floods and landslides. Geospatial data includes topography map, landform map, soil map, integrated with field survey results and soil properties were analized to determine conservation management of agriculture land in the Bone Watershed, Gorontalo Province, Indonesia. The result of this study shows that based on soil properties and physical land characteristics, land use for agriculture should consider appropriate conservation techniques, land capability and respect to local wisdom. © 2018 The Authors, published by EDP Sciences.

关键词： Watersheds

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Development of wall follower hexapod robot

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Journal of Physics: Conference Series 2020年第1期1516卷

作者： K U Ariawan I G Nurhayata I W Sutaya Electronics Engineering Study Program Technical and Vocational Faculty Universitas Pendidikan Ganesha

This study aims to develop a six-legged robot that is able to walk in an arena that resembles a maze (maze wall) and is able to follow a wall (wall follower). This robot is competed in the Indonesian Robot Contest (KRI) in the Indonesian Fire Extinguisher Robot Contest (KRPAI) division which is held annually by the Directorate of Student Affairs, the Directorate General of Learning and Student Affairs, the Ministry of Research, Technology and Higher Education. The research design consisted of 4 stages, including: mechanical design, electronic design, joint movement design at the robot's foot, and software design. The final result of this research was a six-legged robot design (hexapod) with robot dimensions of 29 cm × 29 cm × 25 cm (length × width × height). From several tests, the robot's success rate in completing the mission was 100%, with an average time of 16.73 seconds and the fastest time to complete the mission reached 15.85 seconds. Thus, the robot is expected to be included in the Indonesian Robot Contest (KRI) in 2020.

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Sustainability of the climate village program to prevent the impact of climate change on water supply and sanitation: a perspective from the PESTLE analysis

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IOP Conference Series: Earth and Environmental Science 2021年第1期708卷

作者： P N Sari A Gusti Nofriya I Suci M Pratama Department of Occupational and Environmental Health Faculty of Public Health Andalas University Environmental Engineering Study Program Padang College of Industrial Technology (STTIND Padang) Masters Program in Environmental Sciences Padang State University

The issue of water sustainability and sanitation has developed in recent years, and it is predicted that by 2030 there will be increasing crises. In accordance with the six SDGs goals, it needs some efforts to ensure the sustainability of clean water and sanitation. The climate village program is one way to increase public awareness of the environment, especially providing clean water and proper sanitation and avoiding uncertain climate threats. This research was conducted with a qualitative approach using political (P), economic (E), social (S), technological (T), legal (L), and environmental (E) analysis in a village that was officially declared as a 'climate village.' Data collected by observation and conducting in-depth interviews with five informants who know deeply about this program. The result shows that the spirit of community cooperation is good enough to prevent environmental problems due to climate change. Every aspect of PESTLE shows a promising development, especially in Social and Environment. Still, it needs improvement for every indicator, especially financial assistance, to provide clean water and sanitation technology resistant to climate disruption.

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Android-Based Lecturer Workload Simulation Application

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Journal of Physics: Conference Series 2020年第1期1430卷

作者： Wiwit Agus Triyanto Study Program of Information System Engineering Faculty Muria Kudus University Indonesia

In carrying out their duties, lecturers must conduct Tri dharma education activities which include teaching, research and service according to their respective fields of science. Every tri dharma activity carried out must be reported once every semester in the form of a lecturer workload *** number of activities contained in the rubric makes many lecturers experience confusion to calculate how the credit performance in the Tridharma activities carried out. Therefore, it is necessary to have a simulation application that helps the calculation of credit performance of Tridharma activities in accordance with the BKD rubric. The lecturer workload simulation application can help lecturers to calculate credits for the Tridharma activities that have been carried out. The lecturer workload simulation application can also provide information on what physical evidence needs to be prepared by the lecturer.

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