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A Non-Linear Method for Hypocenter Determination around Central and East Java Region: Preliminary Result

IOP Conference Series: Earth and Environmental Science 2019年第1期318卷

作者： Faiz Muttaqy Andri Dian Nugraha Nanang T Puspito Pepen Supendi Shindy Rosalia Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Agency for Meteorology Climatology and Geophysics (BMKG) Bandung Indonesia

Java Island is highly active tectonic zone and also has a complex geological system as a result of Indo-Australian plate that subducted under the Eurasian plate. This complexity produces many large and destructive earthquakes. Moreover, Java is a most densely populated region in Indonesia. The precise earthquake location can define and evaluate the seismic hazard in the area. In this study, we determined hypocenter location around the central and east Java region by using a non-linear method. We manually picked P-and S-wave arrival time recorded by BMKG network for the time period of 2009 to 2017. We used the minimum 1D seismic velocity model of ak135 to locate the events. We used some criteria for the determination of event location including (i) at least recorded by 4 station which has clear onset P and S arrival, and (ii) has magnitude (MW) > 3. The seismicity in the study area is controlled by subduction and many active faults distributed along the Java Island, also clustered in several areas such as Kendeng thrust, Opak river fault, Kebumen, Banyuwangi, and others. The result of this study indicates the accurately main shallow seismicity zones in central and eastern part of Java region, and also confirm the presence of active inland faults. As further studies, we will conduct 1D velocity modeling and relocate the hypocenters using an updated local 1D velocity model beneath the study area.

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Identifying geothermal steam spots based on binary logistic method to a high resolution imagery and field measurement

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IOP Conference Series: Earth and Environmental Science 2020年第1期500卷

作者： F. Z. Gandes A. Saepuloh K. Wikantika Center for Remote Sensing Insitut Teknologi Bandung Remote Sensing and GIS Research Group Faculty of Earth Sciences and Technology Institut Teknologi Bandung Geology Engineering Study Program Faculty of Earth Sciences and Technology Institut Teknologi Bandung 10 Ganesha Street 40135 Bandung Indonesia Indonesian Young Researcher Forum (ForMIND)

The increasing population of a country has an impact on the number of energy needs that must be provided. Therefore, alternative sources of energy need to be developed to meet those needs. Indonesia is known as The Ring of Fire has very high geothermal resource potential. A study of geothermal mapping technology needs to be done to optimize the utilization of this energy. This study aims to recognize the relation between temperature and surface roughness on an up-flow zone of geothermal system and identify the steam spots at surface. We used a high resolution ALOS-2 PALSAR-2 images to obtain surface roughness and ASTER images to obtain a corrected Land Surface Temperature (LST). The study was conducted in an open area Papandayan Crater, Garut, West Java (Indonesia). Data pre-processing including atmospheric and geometric corrections were applied following an image processing to obtain the surface roughness and the corrected LST by estimating non-unique surface emissivity, pixel fitting between measured surface temperature and roughness at field, and identifying the steam spots of the geothermal system using binary logistic regression method. Equally good models of co-polarization and cross-polarization obtained because of the high correlation between co-polarization and cross-polarization surface roughness. There was a positive relationship between land surface temperature and surface roughness in the manifestation area of geothermal resources and surface roughness known more dominant in determining the manifestations of geothermal resources than surface temperature.

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The effect of fiber volume fraction on tensile and impact properties of eleusine indica grass reinforced polypropylene bio composite

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IOP Conference Series: Materials Science and engineering 2019年第1期539卷

作者： I P Lokantara N P G Suardana I W Surata I N S Winaya Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar-Bali Indonesia Mechanical Engineering Department of Udayana University Street of Bukit Jimbaran Badung Bali Indonesia

The purpose of this research was to investigate the tensile strength and impact strength of eleusine indica grass fiber-reinforced polypropylene recycle composite. In this study, the fiber was treated with alkali at 5% NaOH for 2 hours. The eleusine indica grass fiber cut with a length of 3 cm and the matrix used recycle polypropylene. In this research, the volume fraction of eleusine indica grass fiber varied by 20%, 25%, and 30% respectively. The composite molded with a hot press at temperature 200°C with a holding time for 2 hours. Tensile test used ASTM D3039 and impact test used ASTM D256. The highest tensile and impact strength results on fiber volume fraction 30%.

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Comparison of tensile strength of continues-core method and 4 strand modifies method of after healing of repaired Kessler rabbit's Achilles tendon injury

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IOP Conference Series: Materials Science and engineering 2019年第1期622卷

作者： P S Caksana IKS Kawiyana I W S Dusak T G T Nindhia Resident of Studies Program of Orthopaedic Surgery and Traumatology Medical Faculty of Udayana University Denpasar Indonesia Study Program of Orthopaedic Surgery and Traumatology Medical Faculty of Udayana University Denpasar Indonesia Departmen of Mechanical Engineering Engineering faculty Udayana University Jimbaran Bali Indonesia

Tendon injury causes significant morbidity during the productive age, and the number is increase in recent decades. Tensile strength is the most important factor in tendon function of style, and the results of repair should be able to withstand large current style of early mobilization. This research was an experimental research design with the post-test only control group design with the subject of the rabbit. A total of 18 research subjects who meet the requirements of the study inclusion were randomly divided into treatment and control groups. Control group was a group of rabbits that were repaired with 4 strand modified Kessler technique after Achilles tendon cut sharply. While the treatment group were a group of rabbits that were repaired with continuous-cores technique. The ratio of collagen I/III in rabbit Achilles tendon repair with the technique of continuous-cores are smaller compared to the control group with value of P <0.05. Also Showed statistical analysis tensile strength of rabbit Achilles tendon repair with the technique of continuous-core is greater than the control group at P <0.05.

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UNP Extinct Metric for Bilih Fish (Mystacoleucus padangensis Bleeker)

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IOP Conference Series: Earth and Environmental Science 2019年第1期314卷

作者： Abdul Razak Ganefri Eri Barlian Indang Dewata Biology Department FMIPA Universitas Negeri Padang Indonesia Environmental Science Study Program Postgraduate Program Universitas Negeri Padang Indonesia Department of Electrical Engineering Faculty of Engineering Universitas Negeri Padang Indonesia

This paper write about UNP Extinc Metric. It is new approach and methods how to calculate extinc condition for wild animals especially bilih fish from Lake Singkarak. We introduce new criteria and ombine to seven categories from IUCN. For bilih fish we can calculate number extinc 49 and the meaning is endangered We conclude after that result we can conserve bilih fsh soon as soon for our life in biosfer.

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Determination of retention basin and infiltration well zone for groundwater recharge using GIS-based approach: Case study: Bantaeng regency, South Sulawesi, Indonesia

Determination of retention basin and infiltration well zone ...

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2017 International Symposium on Geoinformatics, ISyG 2017

作者： Devianto, Luhur Akbar Suwarman, Rusmawan Rohman, Asep Iqbal, Rofiq Environmental Engineering Study Program Faculty of Agriculture Technology Brawijaya University Malang Indonesia Meteorology and Hydrogeology Department Faculty of Earth Science and Technology Bandung Institute of Technology Bandung Indonesia Bandung Education and Training Center for Geology Bandung Indonesia Environmental Engineering Study Program Faculty of Civil and Environmental Engineering Bandung Institute of Technology Bandung Indonesia

ISBN: (纸本)9781538616833

Currently, the biggest challenges of the Indonesian Government in water sector is the availability and quality of clean water. The causes of water vulnerability are land use change, rapid population growth, climate change, as well as residential and agricultural activities. In this study, GIS was utilized as tool for determining for retention basin and infiltration well zone as groundwater and surface water conservation. Several criteria were adapted from references such as SNI 03-2453-2002 and Maryland Storm water Design Manual. Several Thematic maps were developed which are slope between 8-30%;clay soil type;open space landuse as paddy field, moor, garden, etc. for developing retention basin zone. While infiltration well zone were needed thematic maps with water table elevation more than 3 m with rock permeability > 2 cm/hr that located outside of hazard zone as well as free of potential pollution as the criteria. Retention basin and infiltration well for aquifer recharge were studied in Bantaeng Regency using GIS tool. Several criteria were set up which allowed building six thematic map and resulting recommendation of retention basin zone as well as infiltration well zone. The results of retention basin zone potentially can be built in Uluere (12.99 km2), Eremerasa (14.19 km2), Sinoa (14.33 km2), and Tompobulu (18.22 km2) districts. While the infiltration well zone are within Eremerasa (20.22 km2) Tompobulu (40.68 km2) and Uluere (45.65 km2) districts. © 2017 IEEE.

关键词： Geographic information systems

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Causing factors of declining trend on samosir panorusan goat population as endangered species in Samosir Island

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IOP Conference Series: Earth and Environmental Science 2019年第1期260卷

作者： Nurzainah Ginting A Manik Hasnudi N Ginting D N Aulia B O Marpaung N V Rahman U Hasanah Animal Production Program Study Faculty of Agriculture Universitas Sumatera Utara Medan Indonesia Toba Lake & Sustainable Tourism Working Group Universitas Sumatera Utara Medan Indonesia Architecture Program Study Faculty of Engineering Universitas Sumatera Utara

A declining trend of Samosir Panorusan goat population has been identified. As the Panorusan is an endemic and endangered species goat where the pure breed only 250,000 heads left, a research was conducted in order to find the cause factors for declining trend of population from April to June 2018 in Pangururan District, Samosir Regency. The method used was multiple linier regression analysis with variabel limitations such as goat feed, disease, breeders'experience, local culture and marketing rate of productive ewe. This research was conducted by asking directly to Panorusan goat breeders. The total of 55 goat breeders was divided into 2-3 breeders/villages. The results of this study indicated that the variable of local culture was significantly as a dominant factor that causing a declining trend of Samosir Panorusan goat population.

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Spatial pattern of sediment transport for analysis of precipitation direction and magnitude in the upper Lematang river sub-basin

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IOP Conference Series: Earth and Environmental Science 2019年第1期389卷

作者： Sarino Agus Lestari Yuono DA Putranto Dinar Civil Engineering and Planning Study Program Faculty of Engineering University of Sriwijaya. Jl. Raya Inderalaya Km. 32 Inderalaya Ogan Ilir Regency South Sumatera Province Indonesia Civil Engineering Post Graduate Study Program Faculty of Engineering University of Sriwijaya. Jl. R. Soeprapto Bukit Besar Palembang City South Sumatera Province Indonesia

The high level of erosion that occur in Musi river basin has improved a tremendous impact on sedimentation in downstream areas and has resulted in many infrastructure of water is disturbed, such as silting of irrigation channels, siltation of rivers which disrupt the flow of transport stream and increasing the risk of flooding, high sedimentation in the port basin, low quality of water and the rising costs of water treatment. This study utilizes techniques terrain models Digital (Digital Elevation Model/DEM) to analysis the spatial distribution of the potential for erosion and sources of sedimentation, as well as the direction of the flow of sediment into channels as well as its relationship with outlet in branching river as the supplies to be sediment to the river flow. The method used in this study using a spatial model analysis with the help of GIS in analysing and presenting the level of erosion and deposition by utilizing modelling slope and kinetic energy of rainfall to estimate the index erosivity and distribution pattern of sediment into the river channel. This research was conducted at the upper Lematang river sub basin with area 412,638 Ha, which are classified into 11 sub-chatments with the highest altitude is 3.159 m above sea level (Dempo Valley) and the lowest is 126 m above sea level (Talang tinggi Valley). Analytical results have been tested by taking a fine sediment sampling in each sub-watershed in the analysis and is taken along the channel network and compare the observed patterns with the results predicted by the model analysis of soil erosion. Overall, erosion by high intensity tends to occur in the relationship between the different vegetation coverage, the barren land and open land used for farms and land used for mining. Approximately 45-65.5% slope bad condition because the vegetation has been open, so it can be seen the amount of erosion in the area is 2.139 ton/ha/year, at the sloping is 1.8239 ton / ha / year

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Risk impact on cost and time from the factors of contractor's managerial and operational

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IOP Conference Series: Materials Science and engineering 2019年第1期523卷

作者： S Husin Abdullah M Riza M Afifuddin Engineering Doctoral Study Program Univ. Of Syiah Kuala 23111 Banda Aceh Indonesia Faculty of Engineering Univ. Of Syiah Kuala 23111 Banda Aceh Indonesia

Aceh Province over the last 20 years has experienced different events that can be divided into 3 (three) phases. 1st Phase is the phase of the conflict (2000-2004), 2nd Phase is the post-earthquake and tsunami rehabilitation and reconstruction phase of Aceh (2005-2009), and 3rd Phase is the post-rehabilitation and reconstruction phase (2010-present). Events that occurred during the last 20 years are certainly likely to provide risks to community activities in the province of Aceh. One of the activities affected by the event is the construction project work. The implementation of construction works affected by events in Aceh Province over the last 20 years is highly vulnerable to risks that impact on achieving project objectives such as cost and time. This study analyzes the impact of the contractor and operational managerial risk factors on the cost and timing of construction. Data were obtained from questionnaires distributed to 15 large qualification companies in Aceh Province. Testing data is done by using the validity test and reliability test. Data that has been valid and reliable then analyzed by using Severity Index (SI). The variables of a managerial risk factor with SI to the highest cost in 1st Phase are F5 (incompetent Engineer), 2nd Phase is F3 (lack of contractor experience), and 3rd Phase is F5 (incompetent Engineer). From the operational risk factor, the highest cost SI in each phase is the G3 variable (electrical disorder). The managerial risk factors with the highest time SI in 1st Phase are F6 (lack of top management support), 2nd Phase is F5 (incompetent engineer), and in 3rd Phase is F3 (lack of contractor experience ). From the operational risk factor, the highest time SI at each phase is G3 (electrical disorder).

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Isolation and identification of indigenous lactic acid bacteria on corn flour BISI-16 during spontaneous fermentation process

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IOP Conference Series: Earth and Environmental Science 2019年第1期347卷

作者： Andi Sukainah Eva Johannes Ratnawaty Fadilah Amirah Mustarin ReskiPraja Putra Agricultural Technology Education Study Program Faculty of Engineering UniversitasNegeri Makassar Makassar Indonesia Department of Biology Faculty of Mathematics and Natural Sciences UniversitasHasanuddin Makassar Indonesia

Lactic acid bacteria (LAB) is one of the dominant bacteria species that have an important role during spontaneous fermentation process of corn flour BISI-16. LAB are known to change the chemical structure of natural corn starch through the activity of enzyme and lactic acid produced during fermentation process. This change of structure causes the modification of physicochemical properties of corn flour. The objectives of this study were to isolate and identify indigenous LAB involved in spontaneous fermentation process of BISI-16 cornflakes. Isolation and identification of early LAB was done by isolation morphology characterization including cell shape, Gram staining, catalase test, and endospora staining. Furthermore, isolates LAB were identified by their genotypes using Polymerase Chain Reaction (PCR) method and 16S rRNA sequencing analysis. The results showed two isolates (ASN3 and ASN5) that had been isolated from corn flour during spontaneous fermentation and were grown on MRSA media having rounded colonic and creamy, rod-shaped cells, Gram (+), catalase (-), and endospores (-). The initial identification stage shows both isolates as candidate LAB. The results of the 16S rRNA sequence analysis showed both isolates were genotypically similar with Lactobacillus fabifermentans with 97% similarity for ASN3 isolates and ASN5 isolates of 98%.

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