bluuebunny/crossref_metadata_2025 huggingface dataset:
Variations of Land Surface Temperature and Its Relationship with Land Cover and Changes in IPB Campus, Dramaga Bogor 2013-2018
Authors: Madakarah Nafiriair Yufan , Supriatna  , Wibowo Adi , Manessa Masita Dwi Mandini , Ristya Yoanna
Published: October 2019

At the present time university can be called "small cities" due to their size of area, population and various kinds of activities. Bogor Agricultural University is a campus that can represent a city in smaller scope with a high variety of land cover. Further, the variation of land cover will affect the surface temperature variation. This study aims to determine spatial pattern of land surface temperature variation and relationship with land cover and also the changes. The data used in this study generated from Landsat 8 imagery and field surveys, then analyze using spatial and statistical analysis tools. The results show temperature has a spatial pattern associated with the land cover. Where the highest temperature tends to be located in the central region in the form of a built-up area and the lowest temperature tends to be located in northern region in the form of forest area. The highest increase in temperature tends to appear in the area that shows changes from vegetation to built-up area. Moreover, this study also found that this phenomenon only appears with temperature value were 7ºC greater than the increase in temperature on a similar land cover. Finally, this study proves that the higher vegetation density will create a lower temperature of land surface, while the higher building density creates a higher land surface temperature.
Installation of Deep Groundwater Wells as Solution to Water Resources Problem in Panggang Subsystem, Gunungsewu Karst Area, Indonesia
Authors: Riyanto Indra Agus , Cahyadi Ahmad , Sismoyo Dwi , Naufal Muhammad , Ramadhan Fajri , Widyastuti Margaretha , Adji Tjahyo Nugroho
Published: October 2019

The karst area in Panggang Subsystem, Gunungsewu has specific hydrogeological properties, including predominant epikarst springs with minimal discharge in dry seasons. Since this situation inevitably leads to drought, the installation of deep wells to extract water from deep aquifers is proposed as an alternative solution to water provision. This study determined the location of these wells using general geological and geomorphological surveys, followed by analyzing the results of geophysical measurements. The results showed potential aquifers in the sand layer of tertiary volcanic aquifers under the limestone formation that makes the karst region. Although three borewells were constructed at three different points, only two of them succeeded and are ready for use to meet the clean water needs of the population at the research site.
Groundwater Flooding due to Tropical Cyclone Cempaka in Ngreneng Karst Window, Gunungsewu Karst Area, Indonesia
Authors: Cahyadi Ahmad , Haryono Eko , Adji Tjahyo Nugroho , Widyastuti M , Riyanto Indra Agus , Nurteisa Yudhistira Tri , Fatchurohman Hendy , Reinhard Hilary , Agniy Romza Fauzan , Nurkholis Afid , Naufal Muhammad , Nurjani Emilya
Published: October 2019

Tropical Cyclone Cempaka occurred on November 27, 2017 in the Indian Ocean, just south of Central Java. This incident induced high rainfall leading to flash floods in the southern part of Central Java, including Gunungsewu Karst Area. The highest rainfall recorded on November 28, 2017, in this area was 239 mm/day (Automatic Rainfall Recorder/ARR Station in Pindul Cave) and 341 mm/day (ARR Station in Tepus). The extreme rainfall also caused groundwater flood in Ngreneng Karst Window. This study aimed to analyze the mechanism of this flood. The results of the analysis showed that it was caused by water filling up the conduit passage in the entire Bribin-Baron underground river system. The flow of the conduit pushed the diffuse flow into the surface fast, and the water that came out of Ngreneng Karst Window was thereby clear. The inundation lasted for ten days and submerged up to 26.4 ha of the study area.
The Pattern of Cooperation between the Ministry of Environment and Forestry of the Republic of Indonesia and the Wildlife Conservation Society-Indonesia Programme in Dealing with the Illegal Transnational Trade of Pangolins in Indonesia
Authors: Andini Afifah Rahmi , Purnaweni Hartuti
Published: October 2019

Indonesia is home to one of the world’s pangolins species whose status is protected internationally in the Appendix 1 Category of CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora). This means that pangolins are categorized vulnerable to extinction and are prohibited to be freely traded. However, since 1990, the number of pangolin populations in Indonesia has declined because of the threat of environmental degradation, illegal hunting and illegal trade. In responding the threat of pangolin extinction in Indonesia, the Indonesian government formed a collaborative initiative with International Non-Government Organizations working on wildlife conservation. This study aims to analyze the pattern of cooperation between the Ministry of Environment and Forestry (KLHK) with the Wildlife Conservation Society-Indonesia Programme (WCS-IP) in dealing with the illegal transnational trade of pangolins. This study used an analysis of interaction patterns of supplementary, complementary, and adversary in a state-non-state actor cooperation approach. The findings in this study showed that cooperation established based on supplementary patterns is carried out by providing capacity building assistance of law enforcement officers from WCS-IP to KLHK. The complementary pattern was by giving mandate to carry out the program from KLHK to WCS-IP, and the adversary pattern was by providing support as well as input by WCS-IP on government regulations and policies. Based on the analysis of the all of the patterns, the cooperation established is more dominated by using supplementary and complementary patterns because of the compatibility of the vision and mission, the intensity of coordination and trust of both parties.
Policy formalization of Artisanal and Small-Scale Gold Mining (ASGM) post-ratification of Minamata Convention for Sustainability (case study of ASGM Gorontalo)
Authors: Puluhulawa Fenty , Harun Amanda Adelina
Published: October 2019

Indonesia ratified the Minamata Convention in Kumamoto Japan through Law No. 11 of 2017 concerning the Minamata agreement. This ratification is intended to provide protection for the environment from the use of mercury-based materials. Previous studies showed that the use of mercury in Artisanal and Small-Scale Gold Mining (ASGM) had a significant negative impact on health and the environment. The problem is whether the problems that need to be done in the application of the above regulations and maintaining environmental sustainability? The research method was carried out through related discussions and discussions with 25 relevant stakeholders, from miners, and local community, which was selected purposively. The research result was analysed qualitatively. This type of research is a combination of normative juridical and empirical juridical. For normative juridical law materials are used regarding relevant laws and regulations and cases. Data analysis was carried out descriptively. The result of the study indicate that The Minamata Convention has not been implemented as expected. The research recommended the need for policies to formalize ASGM in Gorontalo as a solution to facilitate access to mercury use. The need to educate miners about the dangers of using mercury, need alternative solutions to technology interventions for miners.
Implementation of UI GreenMetric at Diponegoro University in order to Environmental Sustainability Efforts
Authors: Lourrinx Effine , Hadiyanto  , Budihardjo Mochamad Arief
Published: October 2019

Green campus is a concept, which integrates environmental science into policy, management and activities of the college. Green campus is also the implementation of the integration of environmental science in all aspects of management and sustainable development practices. Therefore, the standards for referral and encouragement to management in developing a green campus program are needed, one of which is UI GreenMetric. The purpose of this study are to determine how the program of UI GreenMetric is implemented at Diponegoro University and to provide recommendations in the category or indicator that has not been fulfilled. Optimizing the implementation of UI GreenMetric can be used as a further reference in the development of green campus concept in Indonesia. This study uses data in the form of a literature study of standards and guidelines used by UI GreenMetric which are considered in accordance with the strategy of increasing effectiveness in implementing green campus. The results showed the value obtained by Diponegoro University in the UI GreenMetric World University Rankings standards.
Development of Environmental Education through the Adiwiyata Program (Study at: SDN Tlogosari Kulon 03 Semarang, Indonesia)
Authors: Susena  , Bambang Aziz Nur , Mulyani Sri
Published: October 2019

This study was designed to describe the implementation of environmental education through the Adiwiyata program at SDN Tlogosari Kulon 03 Semarang. This type of research is descriptive research with qualitative and quantitative. The method used to develop a development strategy by taking into account internal and external factors using a SWOT analysis. SDN Tlogosari Kulon 03 Semarang has received 80.25% of the Adiwiyata component. The results of the IFAS and EFAS matrix can be seen that the IFAS score is -0.13 and the EFAS score is 0.05. Both matrix results show negative and positive values so plotting in the Grand Strategy matrix will depend on quadrant III. The strategy in quadrant III (W-O) is a priority that must be given the attention needed for a breakthrough to take advantage of existing opportunities to optimize weaknesses in the internal. Schools need to be considered about various parties, the community around the school and published at home so there is harmony between the value invested in the school, which is done at home and in the community. Teachers need to develop alternative learning strategies for environmental education that are applied through practice in everyday life so that it becomes habituation and civilization.
Spatial and Temporal Distribution and Environmental Factors Related to Larval Density An. Barbirostris and An. Subpictus in Bulukumba: an Approach to Industry 4.0
Authors: Suryadi Iwan , Ishak Hasanuddin , Darmawansyah
Published: October 2019

Characteristics of breeding site anopheles, sp supports the solidity of larvae An. barbirostris and An. subpictus . Purpose this study to analyzing Breeding place characteristics with the solidity of larvae An. barbirostris and An. subpictus and know spatially the distribution of Anopheles larvae in Bulukumba. The procedure with ecological survey design and the cross-sectional. Population and sample were breeding sites around the houses of malaria sufferers. Data were analyzed by the application of Statistical Product and Service Solution and Arc Gis 10.1. The spatial distribution shows that the positive Breeding place of Anopheles larvae is around malaria case houses at a distance of 500-1000 meters. Multivariate test on environmental characteristics showed that water temperature had the most influence on the density of An. barbirostris larvae and salinity to the density of larvae An. subpictus . Environmental factors such as water temperature and salinity are factors that support the density of An larvae. barbirostris and An. subpictus . Spatial analysis of its relation to malaria is seen from the characteristics of the Breeding place also seen from rainfall, wind speed, and other climate variables so that predictive accuracy can be better. This is one form of development towards industry 4.0.
Impressed Current Anti Fouling (ICAF) to Reduce Population of Chlorella Vulgaris Cause Bio Corrosion on AH36 Steel in Marine Environment
Authors: Pratikno Herman , Titah Harmin Sulistiyaning , Handayanu  , Mahardhika Gilang Rezha
Published: October 2019

Corrosion can cause damage to steel. One of the main causes of corrosion is biofouling. The Impressed Current Anti Fouling (ICAF) method is one way to prevent the microfouling. The purpose of the study was to calculate reduction of Chlorella Vulgaris population using a simple ICAF system. The simple ICAF reactor was operated with variation of electric current (0.3, 0.5 and 1 A) and duration time (5, 7 and 10 min). Steel of AH36 has a role as a cathode, meanwhile pure copper (Cu) was an anode. The cell number of Chlorella Vulgaris was determined using haemacytometer method. The concentration of Cu was determined using Atomic Absorption Spectrophotometers (AAS). Based on the results, the simple ICAF system showed the decreasing of Chlorella Vulgaris cell number with the highest percentage of 99.98% at electrical current of 1 A, duration time of 10 min and concentration of Cu (17.9 ± 0.07 mg/L). Meanwhile, the lowest of the cell number reduction was 97.57% at electrical current of 0.3 A, duration time of 5 min and concentration of Cu (15.52 ± 0.25 mg/L). In conclusion, ion Cu that was produced during operation simple ICAF system can reduce Chlorella Vulgaris population.
Application of Iodized In Farm and Haloferax Bacteria Technology for Salt Production in Order to Make Zero Waste Salt Consumption Industry
Authors: Nilawati  , Malik Rizal Awaludin , Rame  , Andriani Yose
Published: October 2019

The consumption salt industry produces wastewater in the raw material washing unit. The washing water generated if water concentration already exceeds 250Be, most of its water removed, usually dumped into the environment around the factory, with a volume of about 1.5 m3 per 10 tons of salt washed. Everyday industry wash 60-70 tons salt. So the environment would pollute, because there were metals and chemical contaminants, such as MgSO4, MgCl2, and CaSO4. The aims this research to produce iodized salt from the field and containing NaCl above 94 percent which combines technology with the injection iodized in farm and Haloferax bacteria so consumed salt industry will not need washing and iodizing again. Application experiment performed 3 times which 2 replication without and with using Haloferax bacteria and additional treatment KIO3 solution concentration of 70 and 80 ppm. Results showed that best treatment was addition KIO3 70 ppm and treatment of bacterial Haloferax with KIO3 51,89-56.58 ppm and NaCl were 94.44 to 94.95 percent. SEM EDX test results, salt cube-shaped or rectangle, treatment without addition the bacteria and the crystal morphology of appearing smaller.
Study of Waste Bank’s Condition in Semarang City
Authors: Hadiwidodo Mochtar , Samadikun Budi Prasetyo , Arinasandi Desy
Published: October 2019

The development of waste bank is the initial momentum to grow the collective awareness of the community to start sorting, recycling, and utilizing waste because waste has a good selling value, so that the management of environmentally friendly waste becomes Indonesia's new culture. There are several waste bank units in Semarang City, which has not been evenly distributed and the numbers are still relatively small. The purpose of this study is to determine the existing condition of waste banks in Semarang City and the response from the surrounding community. This study uses survey research methods. The technique of collecting data uses in-depth interviews, observation, questionnaires, and documentation. The analysis technique uses quantitative analysis and qualitative analysis. The results showed that in 2018 the number of active waste banks was 44 units spread over 15 sub-districts in Semarang City with an average number of customers of 120 households each waste bank. The main problem found in the management of waste banks is the lack of community interest to become customers of waste banks, as evidenced by only 35% of respondents interested in sorting waste and waste recycling is only carried out by 7% of respondents.
Algal Concentration Dynamical Model Simulation in Sewon, Bantul, Yogyakarta Facultative Wastewater Treatment Pond
Authors: Sunarsih  , Widowati  , Kartono  , Sutrisno
Published: October 2019

In this paper, we simulate a dynamical model of the algal concentration transport by using data collected in Sewon, Bantul, Yogyakarta facultative wastewater treatment ponds to analyse and evaluate the dynamic of the algal concentration. The governed dynamical model is consisting of the dynamical equation of the algal concentration that involves the inorganic carbon, nitrogen, phosphor, light intensity, temperature, and pH. The obtained research result was shown the evolution of the algal concentration in the pond based on the model. These results were used to observe the algal concentration time-by-time during the observation.
Low Impact Development (LID) as an effort to achieve a sustainable urban drainage system (SUDS). Case Study: Left Side Of Garang River Segment VI Semarang
Authors: Sarminingsih Anik , Samudro Ganjar , Mas’adah Aisyatul
Published: October 2019

The Garang River functions as a flood controller and a source of raw water for drinking water. This river is divided into seven segments, and in the downstream segment VI there is intake of raw water for drinking water. The land use is dominated by built-in land, in the form of dense settlements and industrial estates. This study aims to evaluate the condition of the drainage system, both in terms of runoff and water quality, and apply the concept of LID to achieve a sustainable drainage system. The method used is the SWMM. Evaluations were carried out in three outlets. In existing conditions, channel capacity in general is still sufficient, while water quality does not meet effluent standard quality for observed parameters including TSS, BOD, COD, oil & fat parameters and Total coliform. The LID concept that are suitable are Bio retention cell, Permeable Pavement and Rooftop disconnection.The use of this type of LID is significant enough to reduce runoff by 77% at outlet 1, 98% at outlet 2 and 73% at outlet 3 and decrease in some parameters of water quality by 77% to 100%.
Local-Dis-Connection: The Influence of Semarang-Solo Toll Road to Socio-Spatial Disintegration
Authors: Ayuni Susiyowati Indah , Sariffuddin S.
Published: October 2019

Development of a toll road infrastructure serves as a hub for growth centers and global connections, on the other side, this infrastructure development will instead break local connections and further marginalize lower-class society. Trying to prove the thought, this paper aims to analyze the impact of Semarang - Solo toll road construction on socio-spatial communities in Kandangan Village. This research utilizes livelihood asset variables in the form of social capital, human capital, financial capital, natural resource capital, and physical capital. The method used in this research is the analysis of settlement patterns utilizing GIS, and regression analysis that served to know the size of the socio-spatial disintegration that occurred after construction. The results show that the spatial impacts caused by toll road construction resulted in the physical changes of settlements in Kandangan Village which can be seen from the changes in settlement patterns between the period of 2011 and 2017. Meanwhile, the social impacts show the characteristics of the five livelihood assets that change after the construction of the toll road. The findings of this study indicate that Kandangan village experiences socio-spatial disintegration with moderate levels. Although Kandangan Village has a moderate socio-spatial disintegration level, it doesn’t cause social conflict.
Integration of Human Resources and the Environment on Productive Migrant Village Programs in Banyumas Indonesia
Authors: Muslihudin Muslihudin , Wulan Tyas Retno , Sugiarto Tri , Wardhianna Sotyania , Wijayanti Sri
Published: October 2019

Banyumas is one of the large regency sending of Indonesian Migrant Workers (IMW) abroad, so it received a pilot project from the Ministry of Labor and Cooperatives namely the program of Productive Migrant Village (PMV). The productive business program is one of the four PMV programs. The former IMW was guided by the local government to create a program that combines the potential of human resources with the potential of the environment. The programs are: 1. making food from plantation products in the vicinity, namely food staples made from raw cassava. 2. Cultivation of rabbits whose meat is marketed to the market, 3. Planting California papaya and dragon fruit that looks fertile, fruitful and easily marketing. 4. Making tempe chips. Productive efforts like that considered to be a vehicle for the activities of former Indonesian migrant workers and their families. Such productive activities are in accordance with the potential of IMW as well as the potential of the environment. However, the result of the production business, which has been running for 2 years, there are obstacles in the aspect of human resources. For this reason, the government should provide assistance and guidance to get success in the program.
Behavior Analysis of Traders Regarding Waste Management In The Wonodri Market In Semarang
Authors: Wahyuni Ririn , AP Purwanto , Purnaweni Hartuti
Published: October 2019

This research was conducted to describe the behavior of a trader regarding waste management in the Wonodri Market because there are still many traders who do not care about environmental hygiene related to the management of waste produced, such as disposing of trash leftover from the merchandise in an arbitrary manner and indifference from a trader to waste management. Therefore, an analysis of the behavior of traders is needed, one of which is related to independent waste management carried out by market traders. The method used is field survey, observation of market conditions, and literature study. The results showed that the behavior analysis of traders related to waste management in Wonodri Market was still not perfect, it was shown by the presence of piles of garbage in the kiosk/kiosk aisle, and the behavior of traders who still collected garbage mixed with each other in various compositions. This shows that traders care about waste management is still lacking. The level of education and environment of a trader greatly influences the knowledge and perceptions of traders in waste management in the Wonodri Market. The behavior of traders greatly influences the maintenance of a clean, comfortable and safe market environment, so that it does not hinder the buying and selling process between sellers and buyers and does not break the economic chain that occurs.
Analysis of Household Expenditures on Education in Semarang City, Indonesia Using Tobit Regression Model
Authors: Prahutama Alan , Rusgiyono Agus , Sudarno  , Mukid Moch. Abdul , Widiharih Tatik
Published: October 2019

Data on household expenditure for education is censored data. One method used to analyze this censored data is Tobit regression. Tobit regression changes the response variable which was originally a nominal scale into a mixed scale measurement. Tobit regression can overcome the non-biased categorical regression model. This study aims to analyze the factors that influence household expenditure on education in Semarang city. The dependent variable used in this study is household expenditure for education. The independent variables used include the Education of the Head of the Household, Occupation of the Head of the household, number of household members, Number of Working Household Members, the proportion of household members who attend school ≤ in Junior High School, Senior High School and College, food expenditure in households and regions. Based on the Tobit regression model obtained, the factors that influence household expenditure for education include the number of household members (ART), Number of Working Household Members, the proportion of household members who attend school ≤ in Junior High School, Senior High School and College, food expenditure in households. Generate market research especially in customer satisfaction.
The effect of company financial performance and company characteristics on Greenhouse Gas (GHG) Emission Disclosure
Authors: Wahyuningrum Indah Fajarini Sri , Djajadikerta Hadrian , Suprapti Ema
Published: October 2019

This study aims to examine the effect of company financial performance (profitability), company characteristics (PROPER rating, firm size, and institutional ownership) on Greenhouse Gas (GHG) emission disclosure using all listed companies in Indonesia Stock Exchange in from 2015 to 2017. The GHG emission disclosure variable is measured using the disclosure index approach. The result indicates that on average, the total number of companies disclose their GHG emission disclosure is increased from 30% in 2015 to 32% in 2017, even though the disclosure of GHG emissions is still relatively low. On average, in this study, companies as a sample are in a “blue” rating of PROPER rating (which have value 3 out of 4). The most disclosed item by companies is external verification with 92% in 3 years. The results point out that profitability, PROPER rating, and institutional ownership positively affect the GHG emission disclosure. However, the firm size was not indicated to affect GHG emission disclosure. This study also gives a contribution to the GHG emission disclosure literature by providing factors that affect companies’ GHG emission disclosure, particularly in Indonesia.
Considering Social Aspects of Geothermal Project: The Case of Social Mapping of Geothermal Project on Mount Ungaran
Authors: Setiyono Budi , Setyawan Agus , Jamari  , Susanto Heru , Punto Eko , Yogaribowo  , Abdulrahman Wahid , Susangkiyono Aris Edi , Budiman Risman Chandra , Yuafrinaldi  , Delfa Zukruf
Published: October 2019

The development of renewable energy is an important step to reduce dependence on fossil energy. Geothermal energy is one source of renewable energy in Indonesia. However, when a geothermal project is not managed properly, the social political and cultural conditions of the community can be a failure factor in geothermal development. Through mix methods, this research undertakes social mapping in the project of Mount Ungaran as one of the geothermal development sites. Socially the people in the project area typically are rural communities where the role of informal leaders is very influential. There are a number of communities and non-governmental organizations that disagree with the development plan due to environmental, cultural and economic damage concerns. Yet, political support was obtained from the regional government and village government.
Plastic Waste Pyrolysis Optimization to Produce Fuel Grade Using Factorial Design
Authors: Wirawan Renanto Pandu , Farizal
Published: October 2019

Indonesia is one of the biggest plastic waste production in the world. The government targets to reach 20% for recycling plastic waste in 2019. One alternative to manage plastic waste is using pyrolysis to produce fuel. Pyrolysis is used to degrade the plastic long chain of polymer molecules into smaller molecules. All type of plastic except polyvinyl chloride (PVC) were used in this study to produce fuel. For the purpose, experiment factorial design was used for the optimisation plastic type, residence time, and temperature to maximise the yield of liquid products of the pyrolysis process. In this study 2k factorial design was used for each factor. The result shows that the pyrolysis process used is able to produce diesel like fuel in low temperature.
Comparison of SOGI-FLL with SOGI-PLL for Single-Phase Grid-Connected Inverters
Authors: Royan  , Andromeda Trias , Facta Mochammad , Hermawan  , Setiawan Iwan
Published: October 2019

Phase locked loop (PLL) is a feedback system that has a vital role in the grid-connected inverter systems. The primary function of PLL is to obtain various grid information, such as magnitude, frequency, and phase. That used as the basis for the synchronization process. The primary purpose of this paper is to model and compare the performance SOGI-FLL (Second Order Generalized Integrator - Frequency Locked Loop) With SOGI-PLL, which is a relatively standard PLL. Besides that, this paper also aims to investigate the effect of FLL feedback gain on synchronization performance. Based on the simulation results, the performance of SOGI-FLL in its steady state is superior to that of SOGI-PLL especially for the condition of a single phase power systems that change in frequency.
Simulation of Grid-Tied Photovoltaic System Based on Solar Irradiance and Temperature Data in Semarang
Authors: Fomba Ahmed Jumui Sumoi , Hermawan Hermawan , Andromeda Trias , Facta Mochammad , Setiawan Iwan
Published: October 2019

This paper presents a simulation of a grid-connected photovoltaic power system. A complex model of power distribution system is developed in MATLAB Simulink, then it will be simulated to determine an amount of power delivered to the grid based on irradiance and temperature. Solar irradiance data collection is conducted using a solar irradiance meter. These weather data (solar irradiances and temperatures) are transformed into signal inputs and model through a grid-tied Photovoltaic (PV) model system which consists of PV, incremental conductance Maximum Power Point Tracking (MPPT) method, DC-DC boost converter, inverter, voltage source converter (VSC) control algorithms, and grid equipment. The output variables can be related to current, voltage or power. However, tracing of the current-voltage (I-V) characteristics or power-voltage (P-V) characteristics are the vital need to grid-tied PV system operation. Changes in solar irradiance and temperature imply changes in output variables. Detailed modelling of the effect of irradiance and temperature, on the parameters of the PV module and the output parameters will be discussed. With the aid of this model, one can have a feasible idea about the solar energy generation potential at given locations. This comprehensive model is simulated using MATLAB/Simulink software.
Reservoir Identification Based on Gravity Method at “AUN” Geothermal Field
Authors: Hafidah Annisa Dwi , Daud Yunus , Usman Alfian
Published: October 2019

Sumatra Island has the largest geothermal potential in Indonesia spread along the subduction zone between the Indian-Australian plate and the Eurasian plate. “AUN” geothermal field located in Sumatra Island and considered to be one of the largest potential geothermal prospects in Indonesia. This study is focused on identifying the prospect of “AUN” geothermal field using gravity method. First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) analysis were applied in order to determine a more accurate boundary of the fault. 3D inversions of gravity data were used to reconstruct subsurface model. The result show that analysis of First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) can confirm southwest-northeast fault and caldera structure as a boundary of geothermal reservoir and 3D gravity inversion can show subsurface layers with density 2.5 gr/cc to 2.8 gr/cc inside the boundary which is determined as a heat source in “AUN” geothermal field.
Production of Fuels From HDPE and LDPE Plastic Waste via Pyrolysis Methods
Authors: Istoto Enggar Hero , Widayat  , Saptadi Singgih
Published: October 2019

This study to calculate and composition of fuels from polyethylene waste production per litre. Production method with pyrolysis at 450-621°C without catalyst, and quantitative method with GC-MS. The results product of 5 kg pyrolysis HDPE are 3.25 litres of naphtha; 0.85 litre of gasoline; 0.325 litre of diesel fuel; and 18.06 grams of residues. Then The product of 5 kg pyrolysis LDPE are 0.5 litres of naphtha; 2.9 litre of gasoline; 0.1 litre of diesel fuel; and 19 grams of residues. The conclusions in this study were product of 5 kg pyrolysis HDPE are 3.25 litres of naphtha; 0.85 litre of gasoline; 0.325 litre of diesel fuel; and 18.06 grams of residues. Then The product of 5 kg pyrolysis LDPE are 2.9 litre of gasoline, 0.1 litre of diesel fuel, and 19 grams of residues. Composition of fuels from polyethylene (HDPE and LDPE) pyrolysis are naphtha, gasoline, and residues.
Analysis Performance of Grid Tie Photovoltaic Type Polycrystalline Using Solar Irradiance Simulation
Authors: Pratama Kurniawan Galih Putra , Hermawan Hermawan , Andromeda Trias
Published: October 2019

Indonesia is a country consisting of several islands some of which are still not covered by electricity. It is this source of PV that can be used to meet the needs of people who are not yet affordable with PLN electricity. Basically, PV includes the generation of new renewable energy types. This new form of energy comes from sunlight. Using semiconductor materials can convert energy from sunlight to electrical energy. Because in Indonesia this includes tropical climates located on the equator line, making Indonesia has a very high intensity of light. Several factors affect electrical energy, namely the extent of PV to be used, the total irradiance received by PV, the decrease in performance due to weather and cleanliness of the PV used such as snow and oiliness. In this study explained the Analysis of Irradian-based Grid Tie photovoltaic performance with Polycrystalline PV types. Taking irradian data using a Solar Power Meter, irradiance and temperature data at a certain time will use the Incremental Maximum Power Point Tracking (MPPT) method, DC-DC boost converter, inverter, voltage source converter (VSC) using algorithm and equipment controls connected to network. This research is simulated using Matlab with the Simulink program.
Progress on Nanomaterials for Photoelectrochemical Solar Cells: from Titania to Perovskites
Authors: Kartini Indriana
Published: October 2019

Solar cells have been the queen of alternative renewable energy for the earth. From silicon-based solar cells to the new generation of perovskite-based solar cells, the choice and performance of the materials of the corresponding cells are still the focus of research interest. Amongst, photoelectrochemical (PEC) solar cells trigger the use and exploration of nanomaterials to boost their cell’s performance. This short review focus on the development of nanomaterials used for PEC, from nanoparticles to the one-dimensional titanium dioxide (titania) such as nanofibers and nanotubes, as well as the hybrid system with the perovskite halide. The search for light-harvesting materials is also included especially natural dyes. The review ends with a strategy to marry the natural dyes' potential with the sophisticated structure of nanomaterials to result in an efficient natural dyes PEC solar cells.
Identify the Oil Seepage in Plantungan Geothermal Manifestation, Kendal Using HVSR Method
Authors: Fatma  , Yuliyanto Gatot , Harmoko Udi
Published: October 2019

The presence of oil seepage to the surface indicates that at least an active petroleum system is present subsurface. Oil seepage that occurred in Plantungan, Kendal, Central Java, has been known since 1971 and still produces seepage until today. On the research area, three oil seepages point were found. Plantungan region is located in East Serayu Zone underlain by volcanic area, and based on the Geology Map, the research area is located in Banjarnegara-Pekalongan Sheet. To understand the geology condition of the research area, a subsurface mapping is needed, even though the mapping does not provide the depth of bedrock and reservoir, data recording using HVSR (Horizontal to Vertical Spectrum Ratio) method that has been done in 18 points is able to provide Vp and density profile to understand the distribution of oil seepage. The oil seepage is most prominent close to SB09 location, however the result from crossplot found that the value of highest Vp×density is on SB12A with 4,306,197 kg/m2s, and lowest Vp×density in on SB17A with 302,305.3 kg/m2s.
Spatial Analysis of Tuberculosis Patients’ Health Access in Bandar Lampung
Authors: Wardani Dyah Wulan Sumekar Rengganis , Wahono Endro Prasetyo
Published: October 2019

Social determinants inequality causes different risk factors of tuberculosis (TB), including health access. Bandar Lampung is a city in Lampung province with highest prevalence of TB. Moreover, TB patients in the city have low social determinants. This research aimed to identify health access of TB patients in Bandar Lampung. This research was cross-sectional study that involved four community health centers that have conducted Directly Observed Treatment Shortcourse (DOTS) strategy. Population of this research was smear-positive TB patients in 2016 which recorded in the study site. Sample of this research was 255. Variable of this research was distance of samples’ residences to health services which represented by straight-line of samples’ residence geographical coordinate to health services. Data was collected through Geographical Positioning System and then analyzed using buffering analysis and visualizing by Geographical Information System. The results showed that more than 50% of samples have a short distance (< 1 kilometer) to health services. Based on the results, although most TB patients in Bandar Lampung have low social determinants, they have good access to health services. Moreover, health access of TB patients can be used to support TB control program, including decreasing incidence of TB.
Public Health Policy Practice for Early-Age Marriage in Gunung Kidul, Indonesia: An Evaluation of Regent Regulation Practice on Child Health
Authors: Palupi Restu Anandya , Sulistiadi Wahyu , Asyary Al
Published: October 2019

Background: Early-age marriage becomes the raising issue regarding its implication, particularly on child health. The efforts to reduce this issue were by changing, monitor, and evaluate the rule of the limit age of marriage for children which was still inappropriately happened in Indonesia, especially in Gunungkidul. Purpose: This study evaluated the Regent Regulation practice as its both performance and effectiveness in improving child health in this region. Methodology: A qualitative design was used in this evaluation study with an in-depth interview and analyzed all governments' reports as secondary data collecting. Results: Regent Regulation of 36/2015 affected to reduce the case of child marriage in Gunungkidul. It reduced almost a half (45.78%) of the early-age marriage from 2015 to 2017. Informants confirmed that more than 1/3 divorce cases in this region were decreased as well as the suppressed dispensation for early-age marriage (<100 marriage) and lowest amount of maternity cases on the adolescent group. It was also effective in reducing the low-birth weight, from 2015 to 2017, and stunting cases on children, from 2015 to 2016. Conclusion: Positive externality of Regent Regulation of early-age marriage and its impacts was seen by affecting the spirit of the other regions to follow them.
Improving Quality of PVC Pipes Using Taguchi Method
Authors: Ariani Farida , Siregar Khawarita , Syahputri Khalida , Rizkya Indah
Published: October 2019

PT. XYZ is a company in the field of industrial manufacture of PVC pipe (Poly Vinyl Chloride). Pipe products produced often have a disability are not standards-compliant (5,5%) and exceeds the tolerance (±1%), which has been set by the company. Competitive competition in product marketing lead companies needs to boost quality. The importance of quality is one of the reasons to research the quality of products produced by the company. This study using method seven tools and taguchi to analyze and improving the quality of pipe. Seven tools method used to identify factors that influence product defects. Taguchi method produces the optimum combination of factors that influence the level of significance is the coolant temperature 20 ° C at level 2, extruder temperature of 150 ° C at level 1, haul off the speed of 18 m / s at level 1 and a pressure of 0.06 MPa printing at level 1.
Soil Moisture Prediction using Fuzzy Time Series and Moisture sensor Technology on Shallot Farming
Authors: Prehanto Dedy Rahman , Indriyanti Aries Dwi , Mashuri Chamdan , Permadi Ginanjar Setyo
Published: October 2019

This research conducted by predicting soil moisture using Fuzzy Time Series (FTS) and soil moisture sensor technology on shallot farming. Well-controlled soil moisture affects the shallots and crops growth. It discusses soil moisture prediction and monitoring systems developed through Android-based mobile programming languages. Input data consists of sensor results obtained from automatic, online, and real-time acquisition using soil moisture sensor technology, then, sent to the server and stored in an online database. Furthermore, data acquisition is predicted using the FTS algorithm that applies a discourse universe to define and determine fuzzy sets. Fuzzy set results are continued to the process of sharing the discourse universe so that it becomes the final step. Prediction results are displayed on the information system dashboard developed. Using 24 data from soil moisture data, the predicted score is 760 at the beginning of 6:00. The results of the prediction are done by validating error deviations using the Mean Square Error of 1.5%. This proves that FTS is good enough in predicting soil moisture and safety to control soil moisture in shallots. For deeper analysis, researchers used various request data and U discourse universe at FTS to obtain various results based on the test data used.
Gaussian Prediction Method to Enhance Energy Efficient in Energy Aware AODV
Authors: Hidayat Muhammad Arief , Sofwan Aghus , Prasetijo Agung Budi
Published: October 2019

One of the concerns in the development routing protocol in Mobile Ad Hoc Network is energy consumption which is very influential on package delivery. Energy Delay Aware Ad hoc Demand on Distance Vector (EA-AODV) is one of the routing protocols for the development of Ad hoc Demand on Vector (AODV) that considers energy when receiving packets stored in the routing table. The routing protocol applies the Dijkstra algorithm to determine the shortest route by considering the sequence number and hop count. In the development carried out on EA-AODV is a modification of the Dijkstra algorithm by adding a gaussian prediction method in consideration of the energy level that is expected to be more efficient in terms of energy consumption. Gaussian prediction method was executed in receive request (RREQ) when the packet saved in the routing table. The Application of the network protocol was conducted by comparing the performance of AODV with EA-AODV. The consumption energy of EA-AODV is more efficient at 12.07% compared to AODV.
Forecasting of Groundwater Tax Revenue Using Single Exponential Smoothing Method
Authors: Khairina Dyna Marisa , Muaddam Aqib , Maharani Septya , Rahmania Heliza
Published: October 2019

Setting the target of groundwater tax revenues for the next year is an important thing for Kutai Kartanegara Regional Office of Revenue to maximize the regional income and accelerate regional development. Process of setting the target of groundwater tax revenue for the next year still using estimation only and not using a mathematical calculation method that can generate target reference value. If the realization of groundwater tax revenue is not approaching the target, the implementation of development in the Government of Kutai Kartanegara can be disrupted. The mathematical method commonly used to predict revenue value is the Single Exponential Smoothing (SES) method, which uses alpha constant value which is randomly selected for the calculation process. Forecasting of groundwater tax revenue for 2018 using groundwater tax revenue data from 2013 to 2017. Single Exponential Smoothing method using alpha constant value consists of 0.1, 0.2, 0.3, 0.4 and 0.5. The forecasting error value of each alpha value is calculated using the Mean Absolute Percentage Error (MAPE) method. The best result is forecasting using alpha value 0.1 with MAPE error value was 45.868 and the best forecasting value of groundwater tax for 2018 is Rp 443.904.600,7192.
Usability evaluation to approve an information system design (case study: Immunization monitoring interface design)
Authors: Nugraheni Dinar M K , Alicy Iga , Noranita Beta
Published: October 2019

Prototyping is a useful technique to support the development process of building a software application. It is beneficial particularly when the developer focuses on the user. However, in the requirements phase, the developer has problems to give visualization about the task that should be done when the user interacts with the information system. So, this paper aims to demonstrate that with the usability evaluation in the requirements phase, it can help the IS developer to achieve approval from the potential user of the IS. This paper employs a case study in the process of developing Immunization Monitoring Information System (IMIS) at the Srondol Community Health Centre (Pusat kesehatan Masyarakat / PUSKESMAS), Semarang, Indonesia. For the experiment, this paper only uses two potential IMIS users. The IMIS interface will be tested for its usefulness with variable effectiveness, efficiency, and easy use. The output generated from the experiment was an effective, efficient and easy-to-use interface design for IMIS from the perceptions of child guardians and the perspective of Community Health Centre staff. This paper provides recommendations, that in the requirement process, usability tests can be used to get approval and recommendations from potential user of information systems.
Web-Based Wireless Monitoring System on Patient’s Vital Sign
Authors: Subito Mery , Alamsyah  , Amir Ardi
Published: October 2019

Examination of vital signs such as blood pressure, heart rate, and body temperature is the most basic essential function of the body in determining the health status of the patient. In general, examining vital signs performed by a doctor or nurse uses an electrocardiogram, thermometer, and sphygmomanometer. However, this tool has a weakness in terms of time efficiency and accuracy of reading vital sign data. The process of taking vital sign data for a long time, the limited number of medical personnel in handling patients, and increasing administrative costs certainly become a concern for management in improving health services. To overcome this problem, we proposed a design that can monitor the health condition of patients' vital signs efficiently and in real time. The system used in this study consisted of an HRM-2511E type heartbeat sensor in pulse units per minute (bpm), DS18b20 body type temperature sensor in degrees Celsius (0C), and MPX5700AP sensor in mmHg units. This research is fundamental and is useful in helping medical personnel in monitoring patients' vital sign health conditions. The results of the proposed design showed that the heart rate, temperature, and blood pressure devices worked well with respective accuracy of 97.64%, 99.51%, and 97.53%.