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Development of Maintenance System Procedure Governor Office Building South Sumatera Province

Journal of Physics: Conference Series 2019年第8期1198卷

作者： Andriansyah Maulid Iqbal Mona Foralisa Student of Graduate Program of Civil Engineering Field of Main Study Infrastructure Management Faculty of Engineering Sriwijaya University Palembang Department of Civil Engineering Faculty of Engineering Sriwijaya University Palembang

Building management strategically covers each of the existing organizational units and works together to achieve one goal. The issue of asset management is a problem that is often found in a company, education or government agency, to support every activity of a well-organized asset management building. The maintenance activities of the Governor's Office building run by the General Bureau and Building Sub-Maintenance Sub-Section are now quite good. But in running the maintenance activities to run smoothly of course must be supported by a system capable of supporting these activities. Problems that occur mechanism of maintenance system of South Sumatera Governor Office building is unstructured, executed manually and not well recorded so that if there is maintenance action takes a long time and sometimes not right target. The objective of the study is to develop the Governor's Office Building Maintenance Procedure. Evaluation of maintenance system from activity aspect that is organizational structure, procedure, form and evaluation of user satisfaction aspect with performance variable, information, economics, supervision, efficiency, service then develops Governor Office Building Maintenance Procedure. It is expected that the development of appropriate building maintenance system procedures, effective and efficient to assist the maintenance activities of South Sumatra Governor's office building.

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Role Analysis and Mandor Functions on Bridge and Building Construction Projects in District Ogan Komering Ulu

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Journal of Physics: Conference Series 2019年第8期1198卷

作者： R Vrayudha M Iqbal M Foralisa Student of Graduate Program of Civil Engineering Field of Main Study Infrastructure Management Faculty of Engineering Sriwijaya University Palembang Department of Civil Engineering Faculty of Engineering Sriwijaya University Palembang

The foreman as one of key factors in the success of construction activities, but in reality the role and function of the foreman has not been effective. The aims to identify the description of the role and function of the foreman in the organization of the construction project and information about owner's satisfaction. The population is all owner, contractor, and workman who work in bridge and building construction project in Ogan Komering Ulu. The approach of this study using a quantitative approach that is by survey with questionnaires. Data processing is done by using likert scale by giving value on each answer choice. After that was analyzed with SPSS version 20 computer program. There was a significant difference (p<0.05) between project the expectant owner's level of 4.54 ('always' expected) greater than the owner's satisfaction 4.16 (satisfactory) with the role of the foreman on bridge and building project. There was a significant difference between owner's expectation of 4.59 ('always' expected) greater than the owner's satisfaction 4.30 (satisfactory) with the foreman's function. It is the importance of the role and function of the foreman so that it's necessary to increase the competence of foreman and formulate more effective working agreement mechanism.

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Floor Slab Analysis (Case study: One Residence Apartment Batam Center)

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Journal of Physics: Conference Series 2019年第1期1230卷

作者： Yayuk Setyaning Astutik Civil Engineering Study Program Planning and Civil Engineering Faculty Universitas Internasional Batam Riau Island – 29442.

Reinforced concrete slab are widely used in civil buildings, including as building floors, roof floors, bridge floors and dock floors. The load acting on the slab is generally calculated against gravitational loads. This study aims to analyse floor slab in One Residence Batam Center Apartment Construction Project. The moment method is used to predict the magnitude of frame and shrinkage values that refer to 2002 of SNI. Loading is carried out from dead loads and live loads with a two-way reinforcement system. Reinforcement is done using steel with a diameter of 10 mm. So that the minimum area is 313 mm square with a distance of 250 mm and is in the safe category. From the calculation results obtained the concrete elastic modulus obtained by 250 MPa with a reinforcement ratio of 0.0025. Checking the time dependency factor for dead loads is carried out within 3 months, 6 months, 12 months and more than 5 years. Long-term deflection due to frame and shrinkage is still in the safe category.

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Effect of Pulse Parameters on The Particle Size of Copper Powder Electrodeposition

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IOP Conference Series: Materials Science and engineering 2019年第1期547卷

作者： S Wahyudi S Soepriyanto M Z Mubarok Sutarno Doctoral program of Mining Engineering-Faculty of Mining and Petroleum Institut Teknologi Bandung Bandung Indonesia Department of Material & Metallurgical Engineering-Faculty of Engineering Institut Teknologi Sains Bandung Bekasi Indonesia Department of Metallurgical Engineering-Faculty of Mining and Petroleum Institut Teknologi Bandung Bandung Indonesia Department of Metallurgical Engineering-Faculty of Engineering Universitas Jenderal Achmad Yani Bandung Indonesia

In this paper, copper powder fabrication has been made via electrolysis method using CuSO4 and H2SO4 in aqueous media. Electrodeposition process of copper powder on a metallic surface is done by applying to continue current and pulse current with rectangular pulse waveform. Characterization of copper powder was carried out by SEM to confirm particle size and shape and EDX to determine the copper powder composition. In electrodeposition by applying to continue current to produce the copper powder with particle shape was dendritic, and the elemental composition of the powder was Cu and O. Regarding average particle size, pulse electrodeposition process produces the copper powder with average particle size up to 0.85μm, 72.6% smaller than if apply to continue current.

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Techno-economic analysis of slip ring motor replaced by standard squirrel cage induction motor with VSD

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Journal of Physics: Conference Series 2019年第3期1402卷

作者： H Dewi F H Jufri C Hudaya Department of Electrical Engineering Faculty of Engineering Universitas Indonesia Depok 16424 Indonesia Energy System Engineering Master Study Program Faculty of Engineering Universitas Indonesia Depok 16424 Indonesia

Induction motor slip ring-type technology has been widely used in industrial as one of the crucial electrical components to convert energy mechanically. The construction of this motor is more complex than other standardized induction motors such as squirrel cage. The complexity lies in the connection between the rings and brushes which requires more maintenance. Meanwhile, Squirrel cage motor that is supported by a Variable Speed Drive allows its user to start motor smoothly and adjusts the speed more efficiently. In this study, we exclusively investigate the possibility of the outdated technology replacement by using squirrel cage standardized induction motor based on its compatibility and the financial perspective as well. To prevent any coming up problems, the selections of new motor and VSD must fulfil the requirement of the existing system. Technical data were collected from customer's SCADA and nameplates. While the financial calculation was made based on the payback period. In this case, the payback period is projected within two years and the energy saving could reach 69% that basically depends on operation patterns. According to our perspective, standard squirrel cage motor potentially replaces the slip ring motor in which it is not only having a simple operation but also less maintenance and energy cost.

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Updating Hypocenter Relocation in Indonesia using 3D Seismic Velocity Model: Period of April 2009-March 2018

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

作者： Andri Dian Nugraha Shindy Rosalia Sri Widiyantoro Pepen Supendi Samsul Wiyono Daryono Global Geophysical Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Graduate Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Meteorological Climatological and Geophysical Agency of Indonesia Jakarta

In the past 2 years, we have been conducting routine hypocenter relocation in Indonesia. We compiled and conducted hypocenter relocation of ~50.000 events from a magnitude of 1.4 to 8.5 recorded by 451 stations around and outside Indonesia region. We used local, regional, and teleseismic arrival time data from Indonesian Agency of Meteorology, Climatology, and Geophysics (BMKG) catalog from April 2009 to March 2018. We performed teleseismic double-difference relocation inversion using our previous study of 3D seismic velocity model beneath the Indonesian region with grid size 1 by 1 for inside Indonesia region and 1D global seismic velocity model from AK135 for outside Indonesia region. This method improved limitation from BMKG earthquake data catalog in which events were recorded from scattered seismic station array and insufficient azimuthal gap around Indonesia. Our results show that travel-time RMS residuals were greatly reduced compared to those of the BMKG catalog and the hypocenter location shows significant improvement, refining to the geological structure, especially trench and major faults. These hypocenter relocation results can be helpful for another seismic study in Indonesia region that required a precise hypocenter location e.g. body wave tomography and probability seismic hazard analysis.

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The modification of sago (Metroxylon Sagu) starch by combination of lactic acid hydrolysis and H2O2 oxidation methods to increase baking expansion

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AIP Conference Proceedings 2020年第1期2197卷

作者： Siswo Sumardiono Nindya I. Kusumawardani Assalaam U. Abdurahman A. Arland Bakti Jos Isti Pudjihastuti 1Chemical Engineering Department Faculty of Engineering Diponegoro University Jl. Prof. Soedarto SH Tembalang-Semarang 50275 Central Java-Indonesia 2Master of Chemical Engineering Faculty of Engineering Diponegoro University Jl. Prof. Soedarto SH Tembalang-Semarang 50275 Central Java-Indonesia 3Vocational Program Study of Chemical Engineering Diponegoro University Jl.Prof.Soedarto SH Tembalang Semarang Indonesia 50275

Human needs of food is the absolutely important thing that must be fulfilled, therefore food availability is the very important issue now. Indonesian still use rice for the main source of food, even though Indonesia still have another potential saving to meet national food needs like sago (Metroxylon Sagu). Hydrolysis of sago starch can improve physicochemical properties. The purpose of this research is to hydrolyse sago starch with lactic acid oxidation with H2O2 to improve baking expansion. The variable is the influence of pH to the physicochemical properties of modified starch and the baking expansion, the influence of H2O2 concentration to the physicochemical properties of modified starch and the baking expansion, and the influence of temperature of H2O2 to the physicochemical properties of modified starch and the baking expansion. Based on the physicochemical and rheology properties of modified starch we know the quality of the starch. The modified starch is then analysed the physicochemical and rheology properties such as swelling power, solubility, and baking expansion. The swelling power, solubility, and baking expansion of the starch increase linearly as the temperature increase from 35°C through 50°C. The pH increases from 4 to 6, and the concentration of H2O2 increase from 1% through 2%. However, the baking expansion decreases at pH 6 through pH 8 revealing an optimum acidity for the hydrolysis of sago starch.

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Production of biobuthanol from various lignocellulose waste with Clostridium acetobutylicum bacteria using ABE (acetone-buthanol-ethanol) fermentation

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AIP Conference Proceedings 2020年第1期2197卷

作者： Siswo Sumardiono Agustina R. P. Sari Hansel M. Santoso Bakti Jos Isti Pudjihastuti 1Chemical Engineering Department Faculty of Engineering Diponegoro University Jl. Prof. Soedarto SH Tembalang-Semarang 50275 Central Java-Indonesia 2Master of Chemical Engineering Faculty of Engineering Diponegoro University Jl. Prof. Soedarto SH Tembalang-Semarang 50275 Central Java-Indonesia 3Vocational Program Study of Chemical Engineering Diponegoro University Jl.Prof. Soedarto SH Tembalang Semarang Indonesia 50275

Biobuthanol is produced by fermentation of lignocellulose waste from Clostridium acetobutylicum by the ABE (Acetone-Butanol-Ethanol) fermentation method. In this research on biobuthanol production, variations in the type and composition of lignocelluloses raw materials (rice husk and corn husk) were carried out. The steps of this research include delignification, hydrolysis, fermentation, and yield analysis. The results found in this study are that in the comparison of types and composition mixture of raw materials, the highest production of biobuthanol is achieved in samples with a variation of the composition of the raw material mixture of 25% rice husk and 75% corn husk, this is due to the discovery of the highest levels of cellulose with the least lignin in the sample, so that the hydrolysis process can take place quickly and produce more glucose as the main substrate in biobuthanol fermentation.

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Determining the priority criteria and ranking of provincial bridge maintenance in West Sumatra using a combination of the Fuzzy Analytical Hierarchy Process and VIKOR-Modification methods

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IOP Conference Series: Materials Science and engineering 2019年第1期602卷

作者： Yossyafra N Angelia Yosritzal Meyadtri D I Mazni Lecturer of Department of Civil Engineering Faculty of Engineering Universitas Andalas Master degree student of Department of Civil Engineering Faculty of Engineering Universitas Andalas Lecturer of Study Program of Civil Engineering Universitas Dharma Andalas

There are many bridges that need to be maintained in a provincial road network, with limited funds for bridge maintenance, many bridge criteria (average daily traffic, economic benefits, fund budget, technical conditions, bridge hierarchy, spatial planning, flood potential, type of damage, erosion potential, age and surface concrete, etc.), and various levels of conditions, are a number of criteria that are taken into account in the decision making by the government as an institution responsible for the functioning of roads and bridges. The selection of bridge maintenance priorities in West Sumatra Province was decided through a coordination meeting between agencies, and sometimes relatively without going through sufficient technical analysis. This research initiated, the selected criteria to be taken into consideration, the order of the important criteria in the selected network segment. This study involved a number of road and bridge maintenance experts at the Ministry of Public Works, Road and Bridge Research and Development Institutions, as well as the Department of Public Works and Spatial Planning of West Sumatra Province. A combination of Fuzzy Analytic Hierarchy Process (to determine weighted criteria) and VIKOR-Modification methods (to determine the order of choice of bridges to be handled) are selected. There are eight criteria that can be used in determining the priority of bridge maintenance, and the priority sequence of the most important are: bridge technical conditions, aging of the bridge, average daily traffic, economic benefits, road function, budget, disaster risk (Flood, Landslides, Tsunamis) and Spatial Plans.

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The potential utilization of natural materials as a wall covering of the building in heat reduction

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

作者： K Jeumpa Doctoral Study Program of Technology and Vocational Education Faculty of Engineering Padang State University Indonesia

This paper aims to examine the potential of natural coco fibre to be utilized as a wall covering in building construction for sun radiation protection. engineering innovation in building construction to control the building's temperature is important. Lowering the building's room temperature can be carried out by modifying the wall construction materials. Thus, the usage of an air conditioner which is not environmentally friendly can be reduced. The wall modification can give more protection and dampen the sun's heat, hence the thermal comfort can be obtained. Natural materials, moreover, can be used in the wall modification to reduce the room temperature. In this study, a comparative analysis was carried out between two materials: (1) the coco fibre coated with cement mixture; (2) the mixture of cement and sand, both were used as materials to plaster the wall. The cement mixture acted to bind the compacted coco fibre sheets. The material was evaluated after the cement mixture had been hardened. The test was carried out by providing heat on one side and measuring the temperature on the other side of the material. The results were significant between the two materials. This indicates the potential of coco fibre as a heat insulation in the wall construction materials that can minimize solar thermal radiation into the room.

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