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Analysis geothermal prospect of Mt. Endut using geochemistry methods

AIP Conference Proceedings 2017年第1期1862卷

作者： R. Sobirin A. N. Permadi A. M. Akbar D. Wildan Supriyanto 1Department of Physics Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Indonesia Depok 16424 Indonesia 2Program Study Physics Energy Engineering Surya University Tangerang Banten Indonesia

Mt. Endut geothermal area is located in Lebak district, Banten province, about 40 km to the south of the town of Rangkasbitung. There are four manifestations of hot springs i.e: Handeuleum hot springs, Cikawah 1, Cikawah 2, and Gajrug. Based on geochemical analysis using Na-K-Mg triangular diagrams, Cl-Li-B, and Cl-SO4-HCO3, it is known that Cikawah 1 hot springs is chloride type and the other springs are bicarbonate type. Reservoir temperature range is from 162°C to 180°C are predicted by SiO2 and NaK geothermometers. In general all hot springs are out flows, but there is an hypothesis that Cikawah 1 is the up flow. Because it is in partial equilibrium and chloride type. Mount Endut has a hydrothermal system with a fluid reservoir in the form of hot water or water dominated system. The geothermal prospect area of Mount Endut is located around the Cikawah manifestation to the western part of the Endut mountain. Further research is required by conducting geophysical surveys around the Mount Endut.

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Esterification Reaction of Glycerol and Palm Oil Oleic Acid Using Methyl Ester Sulfonate Acid Catalyst as Drilling Fluid Formulation

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IOP Conference Series: Materials Science and engineering 2017年第1期172卷

作者： V I Sari E Hambali A Suryani P Permadi Program Study of Agriculture Industrial Technology Postgraduate School IPB DarmagaSt Campus IPB Bogor 16680 Surfactant and Bioenergy Research Center LPPM IPB Pajajaran St Campus IPB Baranangsiang Bogor 16153 Department of Agroindustrial Technology Faculty of Agricultural Technology Bogor Agricultural University Program Study of Petroleum Engineering ITB

Esterification reaction between glycerol with palm oil oleic acid to produce glycerol ester and one of the utilization of glycerol esters is as ingredients of drilling fluids formula for oil drilling needs. The purpose of this research is to get the best conditions of the esterification process. The esterification reaction does with the reactants is glycerol with purity of 97.6%, palm oil oleic acid with the molar ratio is 1:1, Methyl Ester Sulfonate Acid (MESA) catalyst 0.5%, and stirring speed 400 rpm. The temperature range of 180°C to 240°C and the processing time between 120 to 180 minutes. The results showed that the best conditions of the esterification reaction at the temperature 240°C and time process are 180 minute. The increasing temperature resulted that the acid number decreases and causing the conversion increased. The maximum conversion is 99.24%, density 0.93 g/cm3, flash point 241°C, pour point -3°C, the boiling point of 244 °C, the acid value of 1.90 mg KOH/g sample, kinematic viscosity 31.51 cSt (40°C), surface tension 37.0526 dyne/cm and GCMS identification, glycerol ester at 22,256 retention time (minutes) and wide area 73.75 (%). From the research results obtained glycerol ester with characteristics suitable for drilling fluid formulations.

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INTRODUCTION

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Bulletin of the American Meteorological Society 2024年第8期105卷 S1-S11页

作者： Boyer, T. Blunden, J. Dunn, R.J.H. NOAA/NESDIS National Centers for Environmental Information Silver Spring Maryland NOAA/NESDIS National Centers for Environmental Information Asheville North Carolina Met Office Hadley Centre Exeter United Kingdom European Centre for Medium-Range Weather Forecasts Reading United Kingdom University of Maryland College Park Maryland Scripps Institution of Oceanography University of California San Diego La Jolla California NOAA/NWS National Centers for Environmental Prediction Climate Prediction Center College Park Maryland Brandenburg University of Technology (BTU) Cottbus-Senftenberg Germany Servicio Meteorológico Nacional Buenos Aires Argentina NOAA/OAR Physical Sciences Laboratory Boulder Colorado European Centre for Medium-Range Weather Forecasts Bonn Germany Center for Geophysical Research and School of Physics University of Costa Rica San José Costa Rica Department of Meteorology and National Centre for Earth Observation University of Reading Reading United Kingdom Centro Nacional de Monitoramento e Alertas de Desastres Naturais CEMADEN São Paulo Brazil Université Grenoble Alpes Institut des Géosciences de l’Environnement IRD CNRS Grenoble INP Grenoble France Hampton University Hampton Virginia Seychelles Meteorological Authority Mahe Seychelles Section for Glaciers Ice and Snow Norwegian Water Resources and Energy Directorate Oslo Norway National Research Institute for Agriculture Food and Environment (INRAE) CARRTEL Université Savoie Mont Blanc Thonon les Bains France Graduate School of Agriculture Osaka Metropolitan University Sakai Japan Science Faculty Universidad Nacional de Colombia Bogotá Colombia University of Bremen Bremen Germany NOAA Global Monitoring Laboratory Boulder Colorado Servicio Nacional de Meteorología e Hidrología del Perú Lima Perú Centro de Investigaciones sobre Desertificación – Spanish National Research Council (CSIC-UV-GVA) Valencia Spain Hydro-Climate Extremes Lab (H-CEL) Ghent University Ghent Belgium Department o

In 2023, La Niña conditions that generally prevailed in the eastern Pacific Ocean from mid-2020 into early 2023 gave way to a strong El Niño by October. Atmospheric concentrations of Earth’s major greenhouse gases—carbon dioxide, methane, and nitrous oxide—all increased to record-high levels. The annual global average carbon dioxide concentration in the atmosphere rose to 419.3±0.1 ppm, which is 50% greater than the pre-industrial level. The growth from 2022 to 2023 was 2.8 ppm, the fourth highest in the record since the 1960s. The combined short-term effects of El Niño and the long-term effects of increasing levels of heat-trapping gases in the atmosphere contributed to new records for many essential climate variables reported here. The annual global temperature across land and oceans was the highest in records dating as far back as 1850, with the last seven months (June–December) having each been record warm. Over land, the globally averaged temperature was also record high. Dozens of countries reported record or near-record warmth for the year, including China and continental Europe as a whole (warmest on record), India and Russia (second warmest), and Canada (third warmest). Intense and widespread heatwaves were reported around the world. In Vietnam, an all-time national maximum temperature record of 44.2°C was observed at Tuong Duong on 7 May, surpassing the previous record of 43.4°C at Huong Khe on 20 April 2019. In Brazil, the air temperature reached 44.8°C in Araçuaí in Minas Gerais on 20 November, potentially a new national record and 12.8°C above normal. The effect of rising temperatures was apparent in the cryosphere, where snow cover extent by June 2023 was the smallest in the 56-year record for North America and seventh smallest for the Northern Hemisphere overall. Heatwaves contributed to the greatest average mass balance loss for Alpine glaciers around the world since the start of the record in 1970. Due to rapid volume loss beginning in 2021, St. A

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Urban forests for sustainable urban development

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AIP Conference Proceedings 2017年第1期1903卷

作者： Denny M. Sundara Djoko M. Hartono Emirhadi Suganda Herman Haeruman J. S. 1Doctoral Student at Environmental Science Program University of Indonesia Jl. Salemba Raya no. 4 Jakarta-10430 Indonesia 2Faculty of Engineering Department of Civil Engineering University of Indonesia Depok West Java 16424 Indonesia 3Faculty of Engineering Department of Architecture Engineering University of Indonesia Depok West Java 16424 Indonesia 4Environmental Science Program University of Indonesia Jl. Salemba Raya no. 4 Jakarta-10430 Indonesia

This paper explores the development of the urban forest in East Jakarta. By 2030 Jakarta area has a target of 30% green area covering 19,845 hectares, including urban forest covering an area of 4,631 hectares. In 2015, the city forest is only 646 hectares, while the city requires 3,985 hectares of new land Urban forest growth from year to year showed a marked decrease with increasing land area awoke to commercial functions, environmental conditions encourage the development of the city to become unsustainable. This research aims to support sustainable urban development and ecological balance through the revitalization of green areas and urban development. Analytical methods for urban forest area is calculated based on the amount of CO2 that comes from people, vehicles, and industrial. Urban spatial analysis based on satellite image data, using a GIS program is an analysis tool to determine the distribution and growth patterns of green areas. This paper uses a dynamic system model to simulate the conditions of the region against intervention to be performed on potential areas for development of urban forests. The result is a model urban forest area is integrated with a social and economic function to encourage the development of sustainable cities.

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study on resistant properties for cracking caused by shrinkage with volume change of concrete using high volume blast furnace slag cement 4

Study on resistant properties for cracking caused by shrinka...

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4th International Conference on Sustainable Construction Materials and Technologies, SCMT 2016

作者： Arai, Jun-Ichi Ishizeki, Kousuke Kanda, Tetsushi Kojima, Masaro Mizobuchi, Toshiaki Major of Civil and Environmental Engineering Graduate school of Engineering and Design Doctoral Program HOSEI University 2-33 Tamachi-Ichigaya Shinjuku-kuTokyo162-0843 Japan Building Construction Group KAJIMA Technical Research Institute KAJIMA Corporation 2-19-1 Tobitakyu Chofu city Tokyo182-0012 Japan Takenaka Research and Development Institute Takenaka Corporation 5-1 1-chome Otsuka Inzai-city Chiba270-1735 Japan Faculty of Engineering and Design HOSEI University 2-33 Tamachi-Ichigaya Shinjuku-ku Tokyo162-0843 Japan

In this study, using a new high volume blast furnace slag cement type C developed in order to improve the effect of inhibition of thermal crack in concrete and the resistance of thermal crack by means of expansion strain in early age obtained by appropriately selecting the dosage of gypsum and calcium carbonate, experiments to evaluate the material were carried out using the testing device in which it was possible to simulate the behavior of thermal stress inside the member in existing structure in the laboratory in order to evaluate the resistance of cracking of concrete. As the result, it was confirmed to have the resistance of crack in which concrete used the new high volume blast furnace slag cement type C was more superior to concrete using Ordinary Portland cement and Portland blast furnace slag type B on the cracking time and stress at cracking. Furthermore, it was also confirmed to the effect of stress relaxation caused by creep in which concrete used the new high volume blast furnace slag cement type C was more superior to the above concrete. © 2016 International Committee of the SCMT conferences. All rights reserved.

关键词： Concretes

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Real time control 'es-dawet' mixer using dasboard based on PLC and WSN

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IOP Conference Series: Materials Science and engineering 2017年第1期237卷

作者： Pandapotan Siagian Sindak Hutauruk Kisno Institut Teknologi Del Faculty of Informatics and Electrical Engineering Computer Network Management Study Program Jl. Sisingamangaraja Sitoluama Toba Samosir Sumatera Utara 22381 Indonesia Universitas HKBP Nommensen Electrical Engineering Department Jl. Sutomo No.1 Medan North Sumatera 22381 Indonesia

The aim of this study is to monitor and acquire the remote parameters like Speed control a DC Motor, IR Sensor, Temperature of pasteurize mix of ice cream, and send these real values over wireless network. A proposed system is dashboard monitoring system for PLC based system wirelessly using ZigBee protocol. To implement this a ZigBee model is connected to a programmed digital signal controller which would transmit the data to Zigbee coordinator which is connected to a PC through RS232 serial communication. Person can need only to send the reply about the process that is to be carried out and PLC will check the status of the web base sent by person and take the action according to it where wired communication is either more expensive or impossible due to physical conditions. A low cost system for measured the parameters of motor such as IR Sensor, Speed control a DC Motor by PWM and temperature with Zigbee protocol connectivity. A database is built to execute monitoring and to save the motor parameters received by radio frequency (RF) data acquisition system. Experimental results show that the proposed system is less costly, provides higher accuracy as well as safe and gives visual environment.

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Potential production of palm oil-based foaming agent as fire extinguisher of peatlands in Indonesia: Literature review

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IOP Conference Series: Earth and Environmental Science 2017年第1期65卷

作者： P Subekti E Hambali A Suryani P Suryadarma Program Study of Mechanical Engineering Pasir Pengaraian University Regency of Rokan Hulu Riau Indonesia Post Graduate Student Program Study Agricultural Industrial Technology Bogor Agricultural University Bogor Indonesia Department of Agricultural Industrial Technology Faculty of Agricultural Industrial Technology Bogor Agricultural University Bogor Indonesia Surfactant and Bioenergy Research Center Bogor Agricultural University Bogor Indonesia

This study aims to analyze the potential aplication of of palm oil-based foaming agent as peat fires fighter in Indonesia. From literature review, it has been known that the foaming agent able to form foam to extinguish fire, wrap and refrigerate the burning peat. It is necessary to develop the production and application of foaming agent in Indonesia because peat fires occur almost every year that caused smoke haze. Potential raw material for the production of environmental friendly foaming agent as foam extinguishing for peat fires in Indonesia aong other is palm oil due to abundant availability, sustainable, and foam product easily degraded in the environment of the burnt areas. Production of foaming agent as fire-fighting in Indonesia is one alternative to reduce the time to control the fire and smog disaster impact. Application of palm oil as a raw material for fire-fighting is contribute to increase the value added and the development of palm oil downstream industry.

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Preparation of MWCNT-Fe3O4 Nanocomposites from Iron Sand Using Sonochemical Route

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IOP Conference Series: Materials Science and engineering 2017年第1期202卷

作者： R Rahmawati A Melati A Taufiq Sunaryono M Diantoro B Yuliarto S Suyatman N Nugraha D Kurniadi Engineering Physics Study Program Faculty of Industrial Technology ITB Bandung 40132 Indonesia Departement of Physics Faculty of Sains and Technology UIN Sunan Kalijaga Yogyakarta 55281 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Negeri Malang (State University of Malang) Jl. Semarang 5 Malang 65145 Indonesia

The composites of multi-walled carbon nanotube (MWCNT) and magnetite (Fe3O4) nanoparticles from iron sand were successfully prepared via the sonochemical route. In this experiment, the MWCNT-Fe3O4 nanocomposites were prepared with different compositions of MWCNT (0.01%, 0.02%, and 0.04%) with the constant composition of Fe3O4 particles. The characterizations were performed by means of X-Ray Diffractometry (XRD), Fourier Transform Infra-Red (FTIR) Spectrometer and Scanning Electron Microscopy (SEM) integrated with Energy Dispersive X-Ray (EDX). The XRD data analysis showed that the Fe3O4 crystallize in spinel structure in nanometric size. Furthermore, the crystallinity of the samples tended to reduce by increasing the MWCNT compositions. The SEM images showed that Fe3O4 tend to agglomerate in nanometric size. The FTIR spectra detected the functional groups of Fe-O bonding that showed the existence of Fe2+ and Fe3+. In the composites, the Fe3O4 nanoparticles were physically mixed with the MWCNTs constructing a unique structure. The as prepared MWCNT-Fe3O4 nanocomposites have the potential for bio-applications.

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Moldable setting time evaluation between sodium alginate and bovine gelatine of glutinous rice mixture as dental putty materials

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IOP Conference Series: Materials Science and engineering 2017年第1期172卷

作者： V Takarini Z Hasratiningsih E Karlina R Febrida L A T W Asri BS Purwasasmita Department of Dental Materials Science and Technology Faculty of Dentistry University of Padjadjaran Sekeloa Selatan 1 Bandung 40132 Indonesia Advanced Material Processing Laboratory Engineering Physics Study Program Institute of Technology Bandung Ganesha 10 Bandung 40132 Indonesia

Putty elastomeric material is a viscous, moldable material that can be used as a dental impression to record and duplicate the tooth structure. Commercially available putty materials are hardly found in the Indonesian market. The aim of this work is to develop an alternative putty dental material from glutinous rice with two different gelling agents; sodium alginate and bovine gelatine. A commercially putty material was used as a control. The length of time required for the putty materials to set (setting time) was evaluated with compression set test. The result showed that sodium alginate and bovine gelatine gelling agents resulted in moldable putty materials that comparable to the commercial product. Glutinous rice mixed with sodium alginate gelling agent demonstrated longer setting time (more than 1 hours) compared to bovine gelatine (6 minutes). These may occur due to heat treatment applied to the bovine gelatine, while sodium alginate mixture has a chemical reaction since CaCl2 crosslink agent had been added to the mixture. Glutinous rice with bovine gelatine mixture is a promising candidate to be used as a dental putty material.

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Effect of space structures against development of transport infrastructure in Banda Aceh by using the concept of transit oriented development

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AIP Conference Proceedings 2017年第1期1903卷

作者： Fadhly Noer A. Rahim Matondang Sirojuzilam Sofyan M. Saleh 1Doctoral Student of the School Pascasarjana Regional Planning University of North Sumatera Indonesia (Lecturer at engineering faculty university of Syiah Kuala) 2Doctoral Program in Educational Pascasrjana Regional Planning University of North Sumatera Indonesia 3Doctoral Program in Educational Pascasrjana Regional Planning University of North Sumatera Indonesia 4Faculty of Civil Engineering Department of the University of Syiah Kuala Indonesia

Due to the shifting of city urban development causing the shift of city services center, so there is a change in space pattern and space structure in Banda Aceh, then resulting urban sprawl which can lead to congestion problem occurs on the arterial road in Banda Aceh, it can be seen from the increasing number of vehicles per year by 6%. Another issue occurs by urban sprawl is not well organized of settlement due to the uncontrolled use of space so that caused grouping or the differences in socioeconomic strata that can impact to the complexity of population mobility problem. From this background problem considered to be solved by a concept that is Transit Oriented Development (TOD), that is a concept of transportation development in co-operation with spatial. This research will get the model of transportation infrastructure development with TOD concept that can handle transportation problem in Banda Aceh, due to change of spatial structure, and to find whether TOD concept can use for the area that has a population in medium density range. The result that is obtained equation so the space structure is: Space Structure = 0.520 + 0.206X3 + 0.264X6 + 0.100X7 and Transportation Infrastructure Development = -1.457 + 0.652X1 + 0.388X5 + 0.235X6 + 0.222X7 + 0.327X8, So results obtained with path analysis method obtained variable influences, node ratio, network connectivity, travel frequency, travel destination, travel cost, and travel time, it has a lower value when direct effect with transportation infrastructure development, but if the indirect effect through the structure of space has a greater influence, can be seen from spatial structure path scheme – transportation infrastructure development.

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