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Response of Gravity, Magnetic, and Geoelectrical Resistivity Methods on Ngeni Southern Blitar Mineralization Zone

Journal of Physics: Conference Series 2018年第1期979卷

作者： Sunaryo Geophysical Engineering Program Study Physics Department Sciences Faculty University of Brawijaya Malang Indonesia

The research with entitle response of gravity, magnetic, and geoelectrical resistivity methods on Ngeni Southern Blitar mineralization zone has been done. This study aims to find the response of several geophysical methods of gravity, magnetic, and geoelectrical resistivity in an integrated manner. Gravity data acquisition was acquired 224 data which covers the whole region of Blitar district by using Gravity Meter La Coste & Romberg Model 'G', and magnetic data acquisition were acquired 195 data which covers the southern Blitar district only by using Proton Precession Magnetometer G-856. Meanwhile geoelectrical resistivity data only done in Ngeni village which is the location of phyropilite mining with the composition content of Fe, Si, Ca, S, Cu, and Mn by using ABEM Terrameter SAS 300C. Gravity data processing was performed to obtain the Bouguer anomaly value, which included unit conversion, tidal correction, drift correction, correction of tie point, base station correction, free air correction, and Bouguer correction. Magnetic data processing has been done by some corrections i.e daily, drift, and IGRF(International Geomagnetic Refference Field) to obtain the total magnetic anomaly. From gravity data processing has been obtained the simple Bouguer anomaly value in range from -10mGal until 115mGal. From this data processing has been obtained the total magnetic anomaly value in range from -650nT until 800nT. Meanwhile from geoelectrical resistivity 3.03Ωm until 11249.91 Ωm. There is a correlation between gravity anomaly, magnetic anomaly, and geoelectrical resistivity anomaly that are associated with deep anomaly, middle anomaly, and shallow anomaly.

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The dynamic model of paddy field conversion control in Citarum watershed

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IOP Conference Series: Earth and Environmental Science 2019年第1期399卷

作者： I Firmansyah Widiatmaka B Pramudya S Budiharsono Study Program of Natural Resources and Environmental Management IPB University Department of Soil Science and Land Resources Faculty of Agriculture IPB University Department of Mechanical Engineering and Biosystem Faculty of Agriculture Technology IPB University Technical Advisor Ministry of National Development Planning/National Development Planning Agency (BAPPENAS)

The rate of population growth and the increase in food needs for consumption have made the need for paddy fields higher. On the other hand, the pressure on paddy fields is quite intense so that the conversion of paddy fields is quite challenging to be controlled. Moreover, the concerns about food security and food sovereignty have become critical issues. The high demand for land utilization has caused pressure on paddy fields in the Citarum watershed. The objective of this study is to build a model for maintaining paddy fields in the Citarum watershed. The study was conducted from June to September 2015. The method of this research is a modelling using system dynamics approach by simulating time series data. From the simulation, it can be concluded that the rate of conversion of paddy fields will still be high if there is no specific policy in its protection. This fact can be seen from various scenario conditions, either in existing circumstances, in the optimistic scenario, as well as in a moderate scenario. The strategy that can be done is that paddy fields should be specially protected or owned by the government to minimize the rate of conversion.

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Sms Encryption Application Using 3Des (Triple Data Encryption Standard) Algorithm Based on Android

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Journal of Physics: Conference Series 2019年第1期1363卷 012077-012077页

作者： Nurdin Dahlan Abdullah Widia Fatimah Ratnadewi, R Kurniasih, Nuning Rianita, Dian Berliana Kusuma Riasti Sofian, Edi Very Karnadi Liantoni, Febri Dian Ade Kurnia Triawan, Adi Cahyanto 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 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.

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Enhancing the geological aspect of aesthetic karst and beaches landscape to promote geotourism in Nusa Dua and Nusa Penida South Bali

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AIP Conference Proceedings 2021年第1期2363卷

作者： Rosmalia Dita Nugraheni Budi R. Permana Yan Darmadi Sapta C. Sahputra Nunung Susilawati 1Geological Engineering Study Program Faculty of Earth and Energy Technology Universitas Trisakti Jl. Kyai Tapa No.1 Grogol Petamburan Jakarta Barat Indonesia 2TRG Apartemen Casa de Parco Magnolia Tower lt. 25 no.1 Indonesia 3PT INTERTEK UTAMA SERVICES Jl. Raya Bogor km.28 rt.004 rw.007 Pekayon Pasar Rebo Jakarta Timur Indonesia 4PT MEDCO Energi Internasional Tbk. The Energy 53FI SCBD Lot 11A Jl. Jend. Sudirman Kav. 52-53 Jakarta 12190 Indonesia

The magnificence of Bali makes this city famous as the world paradise among travellers. Its natural beauty emerges from its landscape, condensed culture and the local community. In southern Bali, the tranquil sandy beaches and karst landscapes attract few tourists, whereas their well-preserved sites store appealing facets of geological phenomena, heritage and tourism which differ to other tourism spots in Bali. This study aims to promote geotourism of Nusa Dua and Nusa Penida in Southern Bali with regards to the geological aspect of carbonate development, bioclastic sedimentation, tidal and wave abrasion, karstification, the emergence of freshwater spring on the sandy beaches and the dissemination of vertebrate fossil in the underwater cave. Geological observation is carried out to investigate karst and beaches morphologies, the geometry of reef carbonate and its karstification proce ss as well as the constituent of abundant white-sand sediments. The collected samples of sands and rocks from 4 sampling sites were analyzed using petrography analysis to identify the rock types and sand composition, while laser diffraction particle size is used to indicate the size distribution and how intense the winnowing process occurred. As a result, the existence of carbonate outcrops in Nusa Dua and Nusa Penida beaches is caused by tectonic uplift that elevates the pre-existing coral reef from shallow marine into the surface. In the surface, the reef carbonate underwent dissolution and karstification, which generated cave or other unique geometry. The discovery of vertebrate fossils in the underwater cave of the Stiva cave, Nusa Penida, reveals that this cave became a shelter for prehistoric human before it was inundated by seawater after the last maximum glaciation. Subsequently, reef carbonate growths perpetually to compensate the sea-level rise, uplifted again to surface and karstified until the present time. Another interesting object is the presence of nearshore groundwater

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Compression strength testing model on clay soil stabilization using variations of cement composition

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IOP Conference Series: Materials Science and engineering 2018年第1期434卷

作者： F Chairuddin Evelyn Associate Professor in Faculty of Engineering Atma Jaya University Makassar Researcher of Civil Engineering Study Program at Atma Jaya University Makassar

The title of this study is 'Compression Strength Testing Model on Clay Soil Stabilization Using Variations of Cement Composition'. The focus of this test is the addition of different compositions of cement and clay. Composition of this test is 100% soil + 0% cement, 70% soil + 30% cement, 50% soil + 50% cement and 30% soil + 70% cement. The next stage of drying is done for 0 days, 5 days, 10 days, 15 days and 20 days. The test is performed by unconfined compression test machine for each sample dried within the time specified above. The cement used is Portland composite cement type (Portlant Cement Composite / PCC). The conclusion is obtained from the results of tests that have been done that the soil composition of 100% + 0% cement land indicates if the longer drained the value of the compressive strength will decrease. However, in the other composition 70% of soil + 30% cement, 50% soil + 50% cement and 30% soil + 70% cement show that the longer drying is done for each composition the relationship between strain and stress shows an increase along with the duration of drying done. However, if analyzed for the largest compressive strength value of this test was found in the 50% + 50% cement sample showing the largest compressive strength (qu) compared with the other samples.

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Design Measuring Instrument Dust Based Internet of Things

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IOP Conference Series: Materials Science and engineering 2018年第1期434卷

作者： S Syahrorini D Hadidjaja A Ahfas A Rahmansyah S H Pramono Study Program Electro Engineering Universitas Muhammadiyah Sidoarjo Jawa Timur Indonesia Faculty of Engineering Brawijaya University Jawa Timur Indonesia

Dust is one of the causes of decreased air quality, for it needs a remote-controlled dust gauge and bias store data measurement results. During this measuring device there is no data storage facility of measurement results, for the need for storage of data measurement results. Storage of measured data using internet of things displayed through PC. So no longer need to dating record to the measurement of dust, simply see the results of measurements through the PC, which can be seen bias measurements an minutes. In building this dust meter using NODEMCU, sensor type gp2y1010au0f sharp, step down, 16x2 LCD. Measurement of dust is done at campus area 2 at four point location that is canteen, entrance of campus 2, electro laboratory warehouse and front page of campus 2. Measurement of dust conducted on 22 and 23 March 2018 at 12:51-12:55, 13:13-13:17, 06:58-07:02, 07:43-07:47, 05:51-05:55, 06:01-06:07, 00:00-00:04, and 00:42-00:46. The result of measurement of dust at campus area 2 at the entrance of the parking at 13:13-13:17 dust concentration tends to rise from 0.1-0.3 when the students come home. The canteen area at 12:15-12:55 concentration of dust tends to rise, that is 0.08-0.1 mg/m3 when the student breaks college.

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Load balancing factor using greedy algorithm in the routing protocol for improving internet access

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IOP Conference Series: Materials Science and engineering 2018年第1期420卷

作者： Ady Satria Poltak Sihombing Sawaluddin Informatics Engineering Study Program Magister Faculty of Computer Science and Information Technology University of Sumatera Utara

Load Balancing is very well applied to the distribution of internet access at any point of the Wi-Fi area so that the use of limited devices can be optimal and on target. The proper use of the Greedy Algorithms when applied to an access point device is very capable in resolving excessive loading in a single resource to take the best choice at every stage in an optimum process. Access point device is also a success factor in running the optimization of the distribution of Wi-Fi access on the Access Point is strongly influenced by the parameters set. In this research, user access factor in one very high Wi-Fi area also influences the possibility of incoming access failure. For the application of the results of this study can be utilized on all access point devices that have limits, but for speed internet access remains at the capacity provided bandwidth.

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Deformation analysis of Mentawai islands based on observation GPS data 2013-2016

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AIP Conference Proceedings 2018年第1期1987卷

作者： Muhammad Rafsanjani Irwan Meilano Dina Anggreni Sarsito Geodesy and Geomatics Engineering Study Program Faculty of Earth Science and Technology Bandung Institute of Technology Indonesia

The islands of Sumatra accommodate the collision of the Indies-Australian plate pressing the Eurasian plate at a speed of 5-6 cm/yr at the boundary between the plates along the west coast of Sumatra (Natawidjaja, D.H., 2007). The oblique collision between the two plates formed a subduction zone in the western part of the island of Sumatra and a number of fault segments on the island of Sumatra. Subduction zones and cesareans segments that are formed actively move so often cause earthquakes in the region. Mentawai islands are located in the westernmost part of Sumatra and belong to the subduction zone of Mentawai Segment Mentawai Islands movement can be identified using GPS observation data. The data used are GPS observation data from 2013 to 2016 coming from Sumatran GPS Array (SuGAr) Network. The data is processed using software GAMIT / GLOBK 10.6. The results of the GPS data processing will be processed to produce velocity velocities and strain values of each GPS observation station used to observe deformation activity on the Mentawai Islands. The results of GPS observation data processing showed vector movement in Mentawai Islands referenced to Sundaland Block leads to the northeast on the northern part of the Mentawai Islands, heading southwest to the southern part of the Mentawai Islands, and heading north to the central part of the Mentawai Islands. The strain obtained from data processing showed that the Mentawai Islands experienced an interseismic phase in the north, a post-seismic phase in the south and a transitional phase in the middle.

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Identified solution management in the landfill with analytic network process

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IOP Conference Series: Earth and Environmental Science 2019年第1期399卷

作者： B Ratnawati M Yani Suprihatin H Hardjomijojo Graduate School of IPB University (Bogor Agriculture University) The Study Program of Natural Resources & Environmental Management Campus IPB Barangsiang Bogor 16144 Indonesia IPB University Vocational of Science IPB University (Bogor Agriculture University) The Study Program of Environmental Engineering and Management JL Kumbang No.14 Bogor Faculty of Agricultural Technology of IPB University Department of Agroindustrial Technics Campus IPB Dramaga Bogor

The solution to solve these challenges is the waste management. The waste management is needed to solve starting from upstream to downstream. The waste management in downstream is in the landfill. The management Landfill not only manages solid waste but also waste water treatment. One form of waste water treatments in a landfill is the leachate treatment. The leachate treatment is a priority for management in landfill because it can reduce water, soil, air pollution in the landfill and the surrounding environment. In order to determine the best option among several alternatives to manage the leachate treatment, this research used Analytic Network Process (ANP) with three levels (actors, criteria, and alternatives). Secondary and primary data collection was carried out from April until June 2019 in Indonesia. Data were collected through a survey using questionnaire instrument. Participants of questionnaire amount of 20 people. The participants from lecturers, government, and society. The finding of this research showed that the leachate treatment using coagulation-flocculation was easier to be used in Indonesia.

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The Discrepancy between The programs and Disaster Management Policy in Klapanunggal District, Bogor, West Java

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IOP Conference Series: Earth and Environmental Science 2018年第1期135卷

作者： D A Puspito Sari I Listiyowati T Nefianto Lasmono Environmental Engineering Program Study Faculty of Engineering and Computer Sciences Universitas Bakrie Indonesia Bogor City Public Health Office Bogor Indonesia Disaster Management for National Security Program Study Faculty of Defense Management Indonesia Defense University Indonesia

Bogor regency consists of 40 districts, 23 are prone tonatural disasters. Klapanunggal district is listed in 10 districts declared as most vulnerable to natural disasters. Natural disasters could lead to loss of property and infrastructure damage and will affect the food security in the region. Food shortages is one example of the condition which causes food insecurity. The aim of this research is to analyze the government's food security strategy in anticipation of disaster with a case study of food insecurity in Klapanunggal district. The analysis suggested that; 1) FSVA is an appropriate program to identify food shortage areas, 2) Food Shortage Relief program (program Penanganan Daerah Rawan Pangan-PDRP) is the optimal efforts in reducing food shortages in the region, 3)The mismatch between FSVA indicators and Food Shortage Relief program makes Klapanunggal district difficult in achievingfree status food-shortage. Based on the analysis, it is suggested that the implementation of Food Shortages Relief program could be carried out based on the priority issues and implemented with integrated coordination and assistance among stakeholders. Such priority issues, integrated coordination and assistance are fully analyzed in this study.

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