bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Andesite Utilization in Gunung Ragas, Clering, Jepara, in the Industrial Sector Based on Petrological and Geochemical Data Analysis
Authors: Agus Widiarso Dian , Lumbanbatu Roynaldo , Nurlita Putri Vergania , Marin Jenian
Published: November 2020

The research area was the exposed extruded igneous lava rock in Clering which became the mining location of PT Semarang Mineral Pembangunan in Clering, Donorejo, Jepara with an area of ± 11 ha. This study aims to identify and determine the composition of andesite minerals by macroscopic and microscopic, the main oxide compound data, the use of andesite in industrial sector. The lithology consisted of andesite lava textured, plagioclase, leucite, clinopyroxene, sanidine as phenocryst and ground mass in the form of microlithic andesite lava as a trachytic texture. The hardness of lithology tends to be more moderate, it is considered unsuitable for building foundations. Andesite and tuff in the study area are currently being mined to be used as raw material for glass because of high silica content. In the industrial sector, the feldspar minerals for flux glass, and ceramic raw materials with standard of PT Semarang Mineral Pembangunan and SNI ISO 14703: 2011, 1147-1984 and SNI ISO 12543: 2011. The lithology tuff can be utilized in the manufacturing of ceramics due to high silica and felspar content. The lithology andesite can be utilized as rocks flour in the manufacturing of fertilizer due to high natrium, potassium, and magnesium content.
Field Evaluation of Hydrologic and Water Quality Benefits of Perforated Paving Block Structure (P2BS)
Authors: S Suripin , Sri Sangkawati Sachro , Pranoto Samto Atmojo , Sutarto Edhisono , Dwi Kurniani , Hery Budieny
Published: November 2020

This paper discusses the use of perforated paving block structure (P2BS) as a pavement structure on the parking lot. Model of P2BS was developed in the field to analyze its capacity in reducing runoff and improving surface runoff quality. The depth and intensity of the rainfall is regulated with a rainfall simulator. The rate of native soil infiltration (natural) was tested with ring infiltrometer. The model's ability to reduce peak discharge and runoff volume, delay time, as well as improve quality of surface runoff was observed. The results show that proposed P2BS are able to significantly reduce runoff volume and peak discharge, delay start runoff and peak discharge time. It is also able to remove pollutants, especially TSS.
The Use of Webgis as an Implementation of Smart Sustainable Cities Concept in Parepare City, South Sulawesi
Authors: Mulyawan  , Sari Hasibuan Hayati , Sodri Ahyahudin
Published: November 2020

The New Urban Agenda will focus on Smart Cities and Sustainable Cities. The smart city is a smart city concept designed to support various community activities and provide easy access to information for the public. Under the smart city agenda, presently, many government agencies are attempting to engineer an urban transformation to tackle urban prosperity, live ability, and sustainability issues mostly through the means of technology solutions. This study aims to formulate a website on land use. The method used in this study begins with a study of the literature to find indicators for Smart City. After determining the indicators and benchmarks for the smart city of Parepare City, the survey of the required data is carried out, the processing of survey data and the analysis and evaluation of current conditions. After learning about the current state of the city of Parepare, the website-gis formulations were carried out as one of the instruments of the smart city. Smart City is one of the new city development and management strategies. This WEBGIS displays the distribution of land use. This model should be a tool used by the Municipality of Parepare to develop land use policies.
The Analyze of Collaborative Management Perspective of Petungkriyono Forest
Authors: Damayanti Irma , Nur Bambang Azis , Soeprobowati T.
Published: November 2020

Forest Ecosystem has a significant role in assuring food security and sovereignty as well as national defense and security. Sustainable forest management is an effective framework to reduce and to add fuel to the impact of Green Houses Gas (GHG) emission changes. Petungkriyono is one of the last tropical forests in Java and provides biodiversity including rare flora and fauna. This area stores outstanding biodiversity that must be maintained, managed utilized to give meaning to humanity. The objective of this study is to analyze how a collaborative management perspective implemented in Petungkriyono as alternative policies that can be recommended to the government. This research shows that a collaborative management perspective significant factor to obtain sustainable development. Further application collaborative management approach recommended with the support of the government on the policy, rules, and human resource development. Through co-management, it was expected to improve the understanding of what people wanted, helped people to identify the issues, arranged the completion priority, increased commitment, social awareness independence. The collaboration between the private sector, local government, and community empowerment a particularly important factor in the success of sustainability management.
Potential of Bioaerosol Emission in The Green House Laboratory and Research Laboratory at Environmental Engineering Department
Authors: Huboyo H S , Hadiwidodo M , Ramadan B S
Published: November 2020

In several countries in the world 24% of total atmospheric particles and 5% - 10% are suspended atmospheric particles are bioaerosols. In Indonesia, bioaerosol studies are mostly carried out in hospitals and school laboratories. The purpose of this research is to calculate potential bioaerosol emission in the research laboratory of the environmental engineering department. The method used is based on literature survey and observation of lab activities during waste composting. Based on our calculation, the bioaerosol flux emission from green house lab was 4.6 – 6.2 x103 cfu/s for Aspergillus Fumigatus, while for research lab it was 12.45 – 16.65 x 103 cfu/s. The emission flux of mesophilic actinomycetes was even bigger. The distribution of bioaerosol at GreenHouse lab declined at 3 m away, while for research lab it declined about 5 m away from the sources. Based on this study, schedule arrangement for the students in these lab is important to minimize bioaerosol exposure.
Plastic Industry and World Environmental Problems
Authors: Oktavilia Shanty , Hapsari Mita , Firmansyah  , Setyadharma Andryan , Fajarini Sri Wahyuningsum Indah
Published: November 2020

The problem of managing plastic waste is the focus of the entire world today. Mismanaged plastics make a significant contribution to the increase in carbon emissions as a result of the release of plastic chemicals that are exposed to sunlight or are burned. The plastics industry which continues to experience an increase in production makes plastic waste continue to increase from year to year. This study aims to determine the relationship of the effect of the amount of plastic production on increasing the amount of co2 emission carbon at the global level using a simple linear regression analysis tool. The results showed that the production of plastics had a positive and significant effect, which meant that the higher the plastics produced by the plastics industry, the higher the amount of CO2 emission carbon. Similarly, the GDP per capita variable, showed positive and significant results. this means that the income pattern of the world community still has a positive effect on environmental degradation.
Water Pollution Index (WPI) and Incidence of Diarrhea Among Children Under Five Years Old in Coastal Area of Semarang City, Indonesia
Authors: Fatimatuzzahro  , Raharjo Mursid , Nurjazuli
Published: November 2020

Coastal area of Semarang City is susceptible to water pollution and one of which is due to sea water intrusion. Diarrhea is an infectious disease that causes more than 26,93% of mortality in children under five years old and cases average over 30% in coastal area of Semarang City. The aim of this study was to evaluate assotiation between Water Pollution Index (WPI) and incidence of diarrhea in children under five years old. This type of research is an observational analytic study with a cross sectional study design. Sampel consisted of 18 respondens from 7 districts in coastal area of Semarang City. Independent variable is water pollution index which is calculated based on parameters of pH, salinity, TDS, and E.coli. Dependent variable is incidence of diarrhea under five years old. Data analysis used univariate and bivariate analysis using rank spearman correlation and Geographical Information System (GIS). Result found moderate category of water pollution index in Mangkang Kulon, Mangunharjo, Mangkang Wetan, and Bandarharjo. We identified associations between water pollution index (p 0,014, r: 0,857), E.coli in water (p 0,017, r: 0,842), salinity in water (p 0,013, r: 0,860), TDS in water (p 0,011, r: 0,871) and incidence of diarrhea. There is no relationship significantly between pH in water (p 0,782, r: -0,130) and incidence of diarrhea. WPI provides information on water quality and contaminants in water has potential trigger to digestive disorders. Cases of diarrhea occured by pathogenic microbiological, material, and chemical compounds. Conclussion, there is assotiation between water pollution index and incidence of diarrhea in coastal area of Semarang City.
Challenges of private forests management in Cluwak sub-district, Pati regency, Indonesia
Authors: Kurniawan Andi , Wasiq Hidayat Jafron , Amirudin
Published: November 2020

The management of private forests carried out by farmers, in general, is still very simple. Land tenure is usually relatively narrow and diffuse, family-based management with limited knowledge and multi cropping in one field. Nevertheless, the benefits can already be felt by farmers both economically, ecologically, and socially. Private forests can increase land cover in the form of trees and various other types of plants. The characteristics of private forests that are generally encountered on Java are also found in the Cluwak sub-district, Pati regency. This paper will review and identify various challenges in private forest management in the Cluwak sub-district, Pati regency. Thus economically, ecologically, and socially sustainable private forest management becomes a challenge that is not impossible to realize. Data analysed descriptively from field observations, various reports, and similar research findings. Several studies have found that there are factors that influence the management of private forests such as internal factors (natural resources, human resources, farmers' group institutional, social) and external factors (markets, government assistance, and culture technique).
The role of waste banks in reducing waste in Gunung Kidul Regency
Authors: Faradina Devita , Maryono Maryono , Warsito Budi
Published: November 2020

The waste bank is an alternative waste management in Indonesia. The waste Bank in Gunung Kidul Regency, Yogyakarta is one of the waste banks that has been established and is active until now. The method used to determine the generation and composition of waste is SNI 19-3964-1994. In addition, research data are obtained by observing and interviewing directly in the field, then analyzed by quantitative descriptive. The results showed the average rate of waste generation in Gunung Kidul Regency was 0.48 kg / person / day. The highest composition of waste in Gunung Kidul Regency is organic waste, which is 77.61%, while non-organic waste is 22.39%. At present, the Waste Bank in Gunung Kidul Regency is able to reduce waste by 0.86% with a total of 6,423 m3 / year reduced waste. The benefits of the existence of a waste bank, among others, are in the field of waste management, in terms of economic and social aspects. The potential for waste recycling is 17.49% from 22.39% of the total non-organic waste.
Family Responsibilities and Career Rhythms for Female Lecturers of Diponegoro University: Patriarchal Culture Hegemony
Authors: Suyanto  , Ary Setyadi
Published: November 2020

This paper aims to explain the relationship between family formation and family responsibilities with the career rhythms of female lecturers. The sampling technique is cluster sampling, followed by the stratified random sampling technique. This study selected a sample of Diponegoro University. The sample size calculation uses the Krejcie and Morgan technique. The number of study respondents was 156 female lecturers. The results showed that family formation was related to career rhythms. The shorter the age of marriage, the more children they have, the lower the age of the first and last child, the slower the career rhythm. The relationship between family responsibility and career rhythm is negative, meaning that the higher the allocation of time, energy, and mind for the family, the lower the rhythm of his career. Most female lecturers work on their own various domestic activities. These activities include service to all family members, especially the preparation of food and work or school (for their children), maintenance of cleanliness and beauty of the house, and the provision of raw materials and consumption for all family members. Although institutional support is not gender discriminatory, female lecturers in developing careers with male lecturers do not equivalent. This shows that Undip female lecturers cannot take advantage of the various opportunities and opportunities available for career development. This is more due to the outpouring of energy, mind and attention to domestic activities (family) because children and families are more valuable than work for female lecturers. This is inseparable from the hegemony of patriarchal culture which is fertile and well-established in Indonesia in general and in Undip in particular.
Communication Patterns of Sendhang Si Dhukun as a Javanese Symbol to Balance Javanese Ideology and their Social Environment
Authors: Wulandari Zindi Nadya , Prihantoro
Published: November 2020

The Islamic new year is considered very important for Javanese people, and even the Islamic new year eve, known as Malam Satu Suro, is claimed as a very sacred time. In various areas, Javanese people conduct rituals to welcome this event, such as the one conducted in Sendang Si Dhukun in Parakan subdistrict of Central Java. This paper aims to explain the communication patterns of Sendhang Si Dhukun ritual on Malam Satu Suro ceremony. This research used a descriptive qualitative method. The data used in this research are collected from informants involved in the rituals. The result shows that the ritual cannot be separated from Islamic teaching as it contains a lot of Islamic prayers. In addition, the mixture of Islamic teaching and Javanese culture can be clearly seen in the ritual. The use of Javanese high level (krama) variety and Javanese poetry (kidung) also dominates the communication patterns in the ritual. This indicates that Javanese people adhere to a belief that religion and culture cannot be separated as they can preserve harmonious relation between their ideology and social environment.
Transformation ofPanglima Laotin Aceh: FromPunggawato Customary Institution
Authors: Utama Mahendra Pudji , Rochwulaningsih Yety , Sulistiyono Singgih Tri , Mujiburrahman
Published: November 2020

This paper discusses howPanglima Laottransformed into the republic from kingdom era. During the kingdom era, Panglima Laot had an important role in the maritime sector, particularly in collecting vessel excise. However, during the Dutch Colonial military penetration,Panglima Laothad adapted to the war situation. After the independence, it adapted to the different situation where kingdoms were no longer exist. This political change transformedPanglima Laotin terms of function, value and position as a form of adaptation. This study uses historical method, especially analyzing local as well as the colonial sources. It also included journal as the reference. This study shows thatPanglima Laotgradually transformed based on certain phase. During the war phase,Panglima Laottransformed into the war force to face the Dutch military penetration. After the independence,Panglima Laothad to adapt once again, it transforms into a customary institution serving for the fishermen within the traditional corridor.Panglima Laoteventually becomes the maritime culture of the Kingdom of Aceh for Indonesia. The existence ofPanglima Laotas a customary institution managing the coastal area is recognized by the Country in the law.
The Combination of Natural Elements and Characteristic of Javanese Women in the Lexicon of the Traditional Household Equipment
Authors: Suryadi M. , Tiani Riris , Surya Rusyda Hana Faza
Published: November 2020

This study aims to describe the combination of non-metallic natural elements found in traditional household appliances on the character of Javanese women attached to the lexicon of traditional household appliances. The relationship between natural elements and traditional household appliances is adhered to when the equipment is made and the functions of the appliance. This combination holds the values of Javanese philosophy. This research uses observation and in-depth interviews which are reinforced by data triangulation. This research also uses a matched method (metode padan) as the analytical method which matches the combination of natural elements with the referential value contained in the lexicon of the traditional household equipment. The findings in this study are the natural elements used as the basis for making traditional household appliances chosen by considering three elements, namely religious elements, natural ecosystem elements, and health elements. These three elements are attached to three semantic components: word-concept-reference, which is used during the process of naming the identity of the lexicon of the traditional household equipment.
Arab Symbols in Coastal Communities for the Development of Multicultural Environment in Semarang
Authors: Amaruli Rabith Jihan , Sulistiyono Singgih Tri , Susilowati Endang , Yuliati Dewi
Published: November 2020

This study aims to identify the symbols and attributes of Arab as part of shaping the multi-ethnic identity of Semarang. As a coastal community, the culture of Semarang is formed by various ethnicities, such as Javanese, Chinese, and Arabic. It is believed to have formed Semarang identity. Through historical research, it is seen that the identity of Arabs in Semarang is more “fluid”. Therefore, it is able to shape the cosmopolitan identity of Semarang. Following Bikhu Parekh’s concept about multiculturalism, this preliminary study can be used for developing a cultural environment based on intercultural experimental efforts while at the same time developing the cultural lives of each ethnic group.
Socio Cultural Reactions Before the Nationalitation of Dutch Railroad in Indonesia 1945-1958
Authors: Widi Wardojo Waskito , Tri Sulistiyono Singgih , Susilowati Endang , Rochwulaningsih Yety
Published: November 2020

The issue of the nationalization of Dutch companies (railroad), which strengthened in the early 1950s, had caused some concern among Dutch companies. The issue was rolled by leftists who were disappointed with some of the results of the Round Table Conference (RTC) in December 1949. There was a phenomenon of xenophobia among natives of something that smelled of foreign (Western) so that the government policies that emerged were rooted in this matter, starting from the Benteng program and the nationalization of the company foreign. This paper aims to parse the anti-foreign phenomenon before nationalization by emphasizing the socio-cultural aspects. If the political process is carried out by the state political elite, then the social process is carried out by other elements of society such as trade unions in the form of boycotts, strikes and demonstrations. While cultural action is carried out by elements of society such as artists and humanists who carry out a variety of artistic actions such as murals, propaganda graffiti, advertisements in the mass media or images that burn the spirit of warriors on the walls in the city area. Particularly among railways, various socio-cultural activities were carried out by the Djawatan Kereta Api (DKA) in the 1950s. This research uses historical research methods based on primary sources traced from archival institutions and libraries. Research results show that the phenomenon of xenophobia that occurred in the decade of the 50s is part of the national socio-political criticism expressed through various forms of social culture.
Undesignated Academic Mosque Response Toward COVID--19 Pandemic
Authors: Harsritanto Bangun I.R , Nugroho Satrio , Dewanta Favian
Published: November 2020

Mosque is a unique building by the function as muslim prayer room. Indonesia as the world biggest muslim country has mandated each building to provide prayer room especially mosque by issuance of Ministry of Public Work- Housing Settlement decree no.14/2017. Academic building like cam-puss also mandated to have the campus mosque to facilitate the Muslim’s civitas academia performing their prayer. However, the campus buildings commonly were not designed with mosque facility in purpose. Thus, campus designer performed remodelling their building to meet this demand. During the pandemic COVID--19 in Indonesia, some of undesignated academic mosques in Architecture Undip were responded it with various adaptation. This study purposed to investigate the responses of those mosque and try to figure the scheme of adaptation phase using descriptive analysis. The result of this study found that the places were follow the government advices and brought alone prayer into common practice.
Fish Traders of Tambaklorok
Authors: Kistanto Nurdien H.
Published: November 2020

This paper describes fish traders who live and work in Tambaklorok, north Semarang city coastal area. In accordance with the coastal environment, livelihood of many people of this area is fishing, carried out by fishermen, and accompanying activities such as selling fish, by female fish processors and/or fish traders. Based on the field data collection and reading the literature, this study aims to generate an analysis of livelihood profile of the fish traders in this community. This study employs field research method by conducting specific observation, interviews and in-depth interviews. This study finds some five fish traders as the actors of coastal environment livelihood, to be presented in this paper.
The Role of Children’s Games in Shaping the Character of Group Communities in Japan
Authors: Rosliana Lina , Widiandari Arsi , Anwar Fithyani
Published: November 2020

Children and games are difficult to separate. In playing the games, a child can hone many things, such as how to make friends, understanding the value of loyal friends, enthusiasm, the feeling of never give up, how to keep trying, tolerance towards others, and much more. By playing, especially in games that involve groups, a child will get the experience that will have a major influence on the formation of character and growth and development. Japanese society is known as a group society. The involvement of a person in a group is one of the ways on how to be a part of a community group. The pride of being a member of a community group is shown by the role and obligation of someone who is included in a group to realize the group’s goals together. Of course, the importance of group awareness is not taught briefly but is something that has been accustomed since early childhood. This research will discuss the meaning of games made by children in Japan that form the character of the group society.
Bioelectricity production from tofu wastewater using microbial fuel cells with microalgae Spirulina sp as catholyte
Authors: Zuli Pratiwi Wahyu , Hadiyanto Hadiyanto , Purwanto Purwanto , Nur Fadlilah Muthi’ah
Published: November 2020

Microalgae-Microbial Fuel Cells (MMFCs) are very popular to be used to treat organic waste. MMFCs can function as an energy-producing wastewater pre-treatment system. Wastewater can provide an adequate supply of nutrients, support the large capacity of biofuel production, and can be integrated with existing wastewater treatment infrastructure. The reduced content of Chemical Oxygen Demand (COD) is one way to measure the efficiency of wastewater treatment. MMFCs reactors are made in the form of two chambers (anode and cathode) both of which are connected by a salt bridge. Tofu wastewater as an anode and Spirulina sp as a cathode. To improve MFCs performance which is to obtain maximum COD removal and electricity generation, nutrient NaHCO3 as the nutrient carbon source for Spirulina sp was varied. The system running phase on 12 days. The results were Spirulina sp treated with MFCs technology has better growth than non-MFCs. The MMFC generated a maximum power density of 21.728 mW/cm2 and achieved 57.37% COD removal. These results showed that the combined process was effective in treating tofu wastewater.
Evaluating the Impact of Technological Adoption Policy for Rural Coastal Communities
Authors: Yudithia Yudithia , Edison Edison , Kristanti Dwi , Samnuzulsari Tri , Suyito Suyito , Yudiatmaja Wayu Eko
Published: November 2020

The solar power plant program is the policy issued by the Indonesian government to assist the rural community on electrical supply in remote islands. However, there is no study to evaluate the implementation of the program for rural coastal areas. In this paper, we examine the impact of new technology adoption for rural coastal communities. We focused on the economic effect of adopting solar power generation in Karimun Regency, Kepulauan Riau. The data were collected using a survey on 262 households in two villages. Using a before-after evaluation strategy, we analyse how the economic condition of the society before and after implementing the new equipment. We find that the implementation of a solar power plant has a positive impact on increasing the household’s income. The results contribute to our understanding of how the effect of adopting the technological policy for rural coastal communities.
Economic Feasibility Analysis of Rooftop Solar Power Plant Design with Household-Scale On-Grid System in Semarang City
Authors: Windarta Jaka , Saptadi Singgih , Denis  , Satrio Dimas Adi , Silaen Johanes Soritua
Published: November 2020

The electricity demand share in the household sector will increase from 49% in 2018 to 58% in 2050 as predicted. This issue is particularly caused by the household growth number which may increase from 67 million in 2018 to approximately 80 million in 2050. For the household customer number are increasing, utilizing rooftop as the base of solar power plants can be an effective and efficient solution. In addition, the government regulation supports the acceleration and development of new and renewable energy. This research aims to analyze the technical economic feasibility of rooftop solar power plant system with a household-scale on-grid system in Semarang City. Through PVSyst 6.43 and RetScreen software also equipped with several primary components, this household-scale rooftop solar power plant investment plan is estimated to have an average revenue return estimated in 10 years later.
Energy consumption of bridge construction: conventional vs precast girders
Authors: Utomo Dwi Hatmoko Jati , Aditama K.A. Uda Subrata , Desta Andika Arya , Kristina Putri Amelia
Published: November 2020

One of the ways to reduce the negative impact of construction projects on the environment is reducing energy consumption. This study aims to calculate the energy consumption of a bridge construction project on the conventional beam girder and the precast girder. Data collection was carried out on the Salatiga-Surakarta toll road bridge project package 4.1 through field observations and interviews with project stakeholders. The results showed that the estimate of conventional girder energy consumption during the raw material transporting stage is 2.857 MJ/km.m3 (4.87%), during the production is 19.989 MJ/km.m3 (34.11%), during the transporting to the location is 3.56 MJ/km.m3(6.07%), and lastly, during the construction stage is 32.201 MJ/km.m3 (54.94%). While the estimate of energy consumption of precast girder at the raw material transporting stage is 2,897 MJ/km.m3 (5.27%), during the production is 49.627 MJ/km.m3 (90.29%), the transporting to the location is 0.957 MJ/km.m3 (1.74%), and during the construction stage is 1.485 MJ/km.m3 (2.70%). The total energy consumption of conventional girders is 58.606 MJ/km.m3 (51.60%), while for precast girder is 54.965 MJ/km.m3 (48.40%). The conventional girder energy consumption is 3.20% greater than the precast girder, thus, in this case, the precast girder is the best alternative to reduce the energy consumption during bridge construction activities. This study provides an understanding of environmental impacts based on the amount of energy consumption of conventional and precast girders, which is useful in the selection of girder beam types that are more environmentally friendly.
Simulation Of Fuel Ball Dimensional Size And Uranium Enhancement For High Temperature Reactor
Authors: E. Setiawati , Z. Arifin , N.A.K Umiati , S. Juliawan , F Arianto , A. Margiantono
Published: November 2020

The purpose of this study was to examine the combined effect of enriching U-235 fuel and fuel fingers (Kernell) to determine its criticality (Keff). In this study, simulation of HTR (High Temperature Reactor) type reactors using MCNPX (Monte Carlo N eXtended Particles). The fuel used is UO2 which has a density of 10.4 gr / cm3, with impurity using 4 ppm Boron atom with Atomic B-10 fraction of 80.1% and B-11 of 19.9%. The variation of enrichment used is 7% to 15% and the fuel radius (Kernell) ranges from 160 µm to 340 µm. From the results, it was obtained that the optimum Keff occurs at 7% enrichment and the radius of the fuel of 310 µm was 1.01236.
Analysis and Cost Estimation of Methanol / Glycerin Distillation Unit Process System
Authors: Silviana S. , Arum Lestari Maghfira , Jethro Sanyoto Gelbert , Diyah Hapsari Farida , Mutiarini Amanah , Eka Septiani Indah
Published: November 2020

An analysis on the process system of a distillation unit was carried out through stages consisting of data collection, computational design and simulation, calculation of the degrees of freedom, economic design criteria assessment, and estimation of cost. The analysis was employed to determine design variables and economical aspects that needed to be considered in the distillation unit design. In this article, field data was obtained from the Biodiesel Plant, PT. Cemerlang Energi Perkasa, Plant 1, Apical Group Dumai, optimized as basis for calculating and assuming certain values or process variables in the preparation of this process system analysis. The degrees of freedom obtained for the distillation column, which has been reduced by the number of variables is C + 2. Through calculation of estimated cost, it is found that total value of fixed capital investment is $ 6,093,147.43 considering cost of main equipment of $ 1,594,230.10 as well as total direct cost value of the methanol/glycerin distillation unit of $ 3,905,863.75. Cost of the process operation is estimated at $ 234,615,524.6 with minimum product price of glycerin $ 3.39/lb. It is hoped that through this analysis, construction of distillation units, especially methanol/glycerin separation, can be well arranged and optimized.
The Energy Production and Efficiency Treatment of ML-MFC Using High Organic Content Wastewater
Authors: Mukimin Aris
Published: November 2020

Microbial fuel cell (MFC) is a technology that is not only able to produce energy but also treats wastewater. The membraneless microbial fuel cell (ML-MFC) system was developed to avoid the use of membranes that are prone to clogging and are less applicable. The reactor was made and arranged in two chambers connected by pipes and the fluid flow rate is set using a peristaltic pump. Three anodes (carbon cloth) were paired with a carbon-Pt cathode GDL (Gas Diffusion Layer) type. The reactor was applied to wastewater taken from the industrial WWTP unit at the point before and after UASB. ML-MFC reactors can produce currents of 0.2 mA (before UASB) and 0.25 mA (after UASB). Current production is strongly influenced by the flow rate and characteristics of wastewater. Increased flow rates and complex character of wastewater will reduce current production. The electric power produced is 0.035 mwatt for wastewater before UASB and 0.086 mwatt after UASB with a COD removal is close to the same, which is 21% at a flow rate of 11 L / min1
Pinch Analysis of Methane Derived Methanol Plant Using HINT Software
Authors: Philia John , Prameswari Jedy , Widayat
Published: November 2020

Methane is a highly potent greenhouse gas which contributes to the pressing global warming issue in the world. Methanol derived from methane was one of the solutions to prevent the escalating greenhouse effect. However, the process was energy intensive and hence pinch technology was used to optimize the heat efficiency in the process. This study aims to determine the optimum ΔTmin indicated with lowest total cost via HINT software. Results shown that the optimum heat exchanger configuration was obtained by network with ΔTmin 10 K, with minimum operating and capital cost of $2,729,590/year and $579,129,590/year respectively.
Dust Exposure and Symptomps of Respiratory Disorder on Worker of Sikatak Bridge Development Project
Authors: Fadli Ramadhansyah Muhammad , Astorina YD Nikie , Onny Setiani
Published: November 2020

Respiratory disorders are health problems that are often suffered by workers who are in the work environment or types of work that are at risk of being exposed to high levels of dust. This study aimed to determine the risk factors for respiratory disorders symptomps on workers of Sikatak bridge construction project workers. This research was an observational analytic study using a cross sectional approach in October to December 2019. Samples in this study were taken from all population as many as 50 people with a total sampling technique, total sampling is a sampling technique where the number of samples is equal to the population. Statistical test results found that there was a significant association between duration of exposure (p = 0.042; PR = 1.565; 95% CI = 1,040-2,354) to the incidence of symptomps of respiratory disorders on workers of Sikatak bridge construction project. Based on this study it can be concluded that symptomps of respiratory disorders have a proportion of respiratory disorders symptoms 1.565 times greater when working more than 8 hours per day. To avoid the risk of respiratory disorders, it can be done by regulating lifestyle, reducing smoking and using personal protective equipment.
Chemical Type Variation of Groundwater in Borobudur and Surroundings Area, Magelang District
Authors: Listyani R.A. T. , Ning Peni Sri.
Published: November 2020

Hydrogeological surveys have been carried out in the Borobudur area and its surroundings, the northern part of the West Progo Hills to the Magelang intermountain plains. The purpose of this study is to determine the variations in groundwater’s chemical types in the study area and to interpret the hydrochemical processes. Primary data was taken in the field, including groundwater data and rock petrology. Physical / chemical data of groundwater were obtained from laboratory test results. Data analysis includes hydrochemical analysis using the Stiff, Piper, and Durov diagrams. The result shows that groundwater in the study area has a wide variety of chemical types, namely Ca, Mg - bicarbonate; Ca, Mg, alkaline – bicarbonate; Alkaline, Ca – chloride, and Alkaline - chloride. Groundwater in the study area is fresh (type Va) to brackish (type Vc), with low -moderate TDS content (119 - 6,810 ppm), and soft calcium carbonate hardness (6.0 - 16.6 ppm). Hydrochemical processes occur in groundwater are simple dissolution and cation exchange caused by clay materials originating from Quaternary deposits or weathering of Old Andesite Formation volcanic breccia. In addition, the presence of brackish water in Karangrejo and Candirejo may be triggered by mixing with fossil water.
Epidemiologic and Clinical Characteristics of Patients with Covid-19 in Central Java, Indonesia
Authors: Sutiningsih Dwi , Eka Fitri Rahatina Vilianti , Prabowo Yulianto , Haryanto Aris , Agung Wibowo Mufti
Published: November 2020

1,533 confirmed cases of Covid-19 were recorded in Central Java until June 3, 2020. It is estimated to increase every day. However, reports on the epidemiological characteristics of confirmed cases of Covid-19 are still limited. The purpose of this study is to describe the confirmed case of COVID-19 in Central Java. This study uses descriptive quantitative design, in which we describe 1,533 cases based on patient characteristics, history of comorbidities, travel history and symptoms. The data of patients processed with descriptive statistical analysis from the Department of Health of Central Java. The results of the study showed that of 1,533 confirmed cases, 64.05 % were male patients and 46.7% aged 19-44 years. From 102 death cases, it is dominated by men (64.7 %) and the elderly ≥60 years (50 %). The highest IR is the City of Semarang with IR of 17.9 / 100,000 population. The most common history of comorbidities is hypertension and diabetes mellitus with a total of 5 cases each. Cases with a domestic travel history had the highest number of 34.1% while those without a travel history amounted to 65%. The symptoms experienced by most confirmed patients are Cough, Fever with 10.8%. Thus, it was concluded that confirmed cases in Central Java were spread in 35 cities / regencies with high number. It is necessary to conduct a detailed confirmed case reports to control the policy on Covid-19 prevention and countermeasures in Central Java.
Modelling Generalized Poisson Regression in the Number of Dengue Hemorrhagic Fever (DHF) in East Nusa Tenggara
Authors: Prahutama Alan , Ispriyanti Dwi , Warsito Budi
Published: November 2020

Regression analysis is an analysis used to model the relationship between the dependent variable (Y) and the independent variable (X). If the dependent variable is a discrete random variable, it is developed using the Poisson regression model. Poisson regression models require non-over-dispersion model assumptions. To deal with over-dispersion, a Generalized Poisson regression model was developed. Generalized Poisson regression (GPR) model is an extension of the Poisson regression model. In this study a GPR model is applied to model the number of dengue hemorrhagic fever (DHF) sufferers in East Nusa Tenggara Province in 2018. The independent variables used include percentage of poor population (X1), population density (X2), percentage of proper sanitation (X3), percentage of decent homes (X4), number of doctors (X5), percentage of access to improved drinking water (X6), average length of schooling (X7), human development index (X8). In the resulting model, Poisson regression experiences multicollinearity and overdisception occurs. To overcome multicollinearity, variable selection is performed. Based on the measurement of the goodness of the model using AIC, the GPR model provides better accuracy than Poisson regression to model DHF in East Nusa Tenggara which is 218.5.
The Relationship Between Heat Stress and Physical Workload with Worker's Hydration Status in Tirtonadi Bus Station Surakarta
Authors: Suryadi Iwan , Yuliadi Istar , Rinawati Seviana , Rachmawati Siti , Nugraheni Bekti
Published: November 2020

Terminal workers work with physical load activities every day and are in a hot work climate, which has the potential to experience status disturbances, potentially resulting in hydration problems. The purpose of the study was to analyze the relationship between Heat stress and Physical Workload and Hydration Status of Tirtonadi Bus StationWorkers in Surakarta. research design using observational analytic with a cross-sectional approach. A sample of 48 people was taken by simple random sampling technique. Heat stress is measured by heat stress area, physical workload with SNI 726/2009, and hydration status by urine specific gravity examination. the average heat stress measurement results amounted to 34.75 ° C. the correlation between independent and dependent variables shows there is a significant relationship between heat stress and physical workload with hydration status with p-value = 0,000 and r = -0,799, and p-value = 0.028 and r = 0.317. Conclusion: There is a significant correlation between heat stress and hydration status, and there is a significant correlation between physical workload and the hydration status of workers at the Tirtonadi Surakata Terminal.
The Relationship Between Social Support and Psycchological Well Being of Indonesian Rural to Urban Migrant University Students in Universitas Airlangga
Authors: Rachmadhani Mahda P. , Setyo Palupi Listyati
Published: November 2020

Indonesian parents believe that higher education in urban area or big city such as Surabaya have a good quality compared to the one in rural area. Therefore, they encourage their children to pursue higher education in Surabaya. However, it has been identified that rural to urban students has emotional disorder when trying to adapt to the urban life. This circumstances lead to a low level psychological well-being. One of the factors that could increase psychological wellbeing condition is social support. However, there is still little evident that shown the relationship between social support and psychological well-being among plural to urban students. Therefore, the aim of this study is to identified the relationship between social support and psychological well-being. This was quantitative research that used social support scale and psychological well-being scale. This research involved 226 students of Airlangga University, Surabaya. The value result of correlation coefficient is 0.018 which mean in this study there is a positive relationship between social support and psychological well-being of Airlangga University rural to urban students.
Has it done properly? The Difference between Before and After Social Distancing’s Policy Implementation in Controlling Covid-19 in Jakarta, Indonesia
Authors: Darmawansyah Alnur Rony , Veruswati Meita , Asyary Al
Published: November 2020

Social distancing shall be effective to control Covid-19 spread. However, its effectiveness is doubtfully due to late response of authority in a low-resource setting such as Indonesia. This study aims to present the effectiveness of large-sale social restriction (LSSR) as the social distancing policy by analyze the chronological as well as the difference between before and after LSSR implementation in Jakarta, Indonesia. The secondary data analysis was derived from surveillance data for Covid-19 from government authorities, including the Ministry of Health and the local government of Jakarta. Two statuses related to Covid-19 were examined in the study: incidence and suspect. These Covid-19 statuses were presented in daily rates with pre and post of LSSR policy in Jakarta, Indonesia. LSSR policy had just implemented over a month after the first multiple cases found. The number of positive confirmed patients increased significantly after the LSSR (p-value = 0.000; mean difference = -70.532). This study’s findings showed that social distancing was not effective to control Covid-19 incidence which indicates the late response of the authorities.
Modelling Tsunami Level of Hazard in Pariaman Coastal Area, West Sumatera
Authors: Ikhsanti Hilza , Saraswati Ratna , Sri Rahatiningtyas Nurul
Published: November 2020

Pariaman is a coastal area in West Sumatera which is located near the seismic fracture. The Semangko fracture consists of the Sumatran fault that extends from north to south and the subduction zone of the plate is located at the base where the two Indo-Australian plates meet. This study aims to determines the level of tsunami hazard in Pariaman coastal area. This study is designed based on tsunami inundation model. The analysis results show that the coastal area of Pariaman is at high tsunami hazard with an area of 1032,53 Ha, area that at middle tsunami hazard with an area 160,39 Ha and area that at low tsunami hazard with an area 88,50 Ha.
Development of Ultrasonic Anemometer Using HC-SR04 with Kalman Filter Based on Microcontroller Integrated IoT
Authors: Adi Kuncara Ivan , Endro Suseno Jatmiko , Agus Setyawan , Gunadi Isnain
Published: November 2020

Measurement of wind speed using an anemometer is very important in various fields. The most effective and efficient type of anemometer is the ultrasonic anemometer. This research develops an Arduino-based ultrasonic anemometer using the HC-SR04 sensor with a Kalman filter to reduce noise and integrated IoT with the Blynk application on a smartphone. The advantage of ultrasonic anemometer is not having analog signal conditioning and analog filters, thereby reducing the possibility of having noise, low cost, and can be monitored remotely. The ultrasonic anemometer has been calibrated on the wind tunnel and has a measurement resolution of 0.10 m/s and a measurement error of 0.14 m/s.
Optimization Image Quality of Knee MRI Sagital Plane T2 Weighted TSE Sequences with Variations of Echo Train Length (ETL) on Cartesian and Blade Technique
Authors: Indrati Rini , Rochmayanti Dwi , Rubiyanti Heny , Susilawardhono Donny , Daryati Siti , Mulyati Sri
Published: November 2020

The use of Cartesian and Blade techniques also affects image quality. The Cartesian technique is more commonly used in Knee MRI examinations. Cartesian technique is vulnerable to movement, giving rise to motion artifacts. This motion artifact is often caused by too long scanning time, so ETL settings are important. An alternative to reducing this risk is to use the Blade technique and by setting the appropriate ETL. The research objective was to determine the differences image quality and anatomical information and to determine the technique that produced quality images and MRI anatomical information on the sagittal knee section between the Cartesian ETL and Blade T2 Weighted TSE combination. This is experiment research. Samples of 10 volunteers, carried out scanning with Cartesian and Blade techniques with variations ETL 14, 16, 18. Focus of assessment on ACL, PCL, meniscus, fluid, and fat. Image quality includes SNR and CNR. The assessment of the anatomical information by a radiologist. Data analyzed with Anova, Friedman, and Wilcoxon test. The results study showed that overall, there are significant differences in image quality between Cartesian and Blade techniques with p-value 0.005. There are differences in anatomical information with p-value <0.001. The best technique from image quality (SNR and CNR) is Cartesian-ETL 14 and based on anatomical information, the best technique is using Blade-ETL 14. Image quality in the two techniques with ETL 14 there is no significant difference with p-value of 0.414, so that Cartesian and Blade-ETL 14 settings produce the same image quality.
Tourism and Absorption of The Labor Force in Indonesia: A Strategy for Development
Authors: Fahlevi Mochammad , Rita  , Siti Rabiah Arbi , Aristianto Pradipta Indry , Marta Alan , Dipo Fauzan
Published: November 2020

The poor quality of labor causes low productivity and competitiveness. The objective of this study was to mediate the effect of labor absorption on economic growth in the tourism area of Lombok island. This study used the total population of the Lombok island community in three popular destinations to date among others are Senggigi Beach, Kuta Beach Lombok, and Gili Trawangan Beach with a total of 275.267 respondents. This study used random sampling because the total population is more than 100 respondents. The result found that direct or indirect effects in mediating labor absorption towards economic growth in the tourism area of Lombok island are great. Other results showed a strong indicator in each variable that affects labor absorption towards economic growth in the tourism area of Lombok island namely having the skills and fair business competition