bluuebunny/crossref_metadata_2025 huggingface dataset:
Dragon fruit agriculture on soil geomorphology perspective
Authors: Apriyanto B , Kurnianto F A , Ikhsan F A , Anita Sari E
Published: June 2020

This study aims to describe the land horizon of soil texture that is influenced by soil moisture, soil pH, soil organic matter and soil color in dragon fruit gardens in the Kemuning Lor village, Arjasa Subdistrict, Jember Regency. The type of research used includes qualitative research using the survey method. The object of this research can be obtained and reviewed from the Geomorphological and Geological Map of the Arjasa Subdistrict, Kabupaten Jember, East Java Province on a scale of 1: 25,000 (Indonesian Digital topographic map), which is on the condition of the land horizon. Point samples are determined by the area of the dragon fruit orchard selected to be used as five sample points by means of tools, namely, google earth, GPS, pH and humidity measuring devices, geological maps, and geomorphological maps. The results showed that the 5 points taken at the dragon fruit garden had an average pH that was neutral, the soil moisture was high, the soil was of average dark brown and blackish brown, brown in such a way that the condition of organic matter was present in O horror or the uppermost layer itself has a fairly high level of soil fertility, the soil structure that is there contains quite a lot of sand and clay. These conditions influenced by old volcanic landform, aluvial plain, and quarter volcanic landform
Dental and oral health profile of elderly people in various geographic areas in Jember Regency, Indonesia
Authors: Hamzah Z , Handayani A T W , Meilawaty Z , Shita A D P , Indriana T
Published: June 2020

People often adjust their behavioral pattern to the physical conditions of local environment, especially for elderly dental and oral health. Elderly is a population which is very vulnerable to environmental changes and diseases. Elderly people who have good oral health are expected to have good general health. This study focuses on dental and oral health profiles of elderly in the different residential location. Geographically, the locations of elderly resident are divided into 4 areas, i.e. urban, agricultural, highland/mountain and coastal areas. This research was carried out using a cross sectional approach. The research population was elderly aged more than 45 years. Research subjects were determined using cluster random sampling based on the geographic residential areas (n=229). Measurements of dental and oral health profile were based on the Decay-Missing-Filling-Teeth (DMF-T) indicators and the Simplified Oral Hygiene Index (OHI-S). 229 research subjects were analyzed using Kruskall Wallis tests. The results show that most of the elderly have poor dental and oral health profile. However, the elderly who live in the coastal area have better dental and oral health profile. Meanwhile, the elderly who live in the highland area have the worst profile of oral and dental health compared to the elderly who live in other areas.
Pre-service science teachers’ understanding of scientific method for studying local environmental issues
Authors: Supeno  , Astutik S , Lesmono A D
Published: June 2020

The scientific method is a procedure used by scientists to test generalizations and hypotheses with observation and experiment activities to obtain proven theories. Scientific methods become an essential part of the development of science, so that science learning teaches them, including in learning about earth science because most of the information in earth science is found through scientific inquiry. Pre-service science teachers must understand the scientific method and its application in studying the local environment so that it can be implemented in the learning process, especially when prospective teacher students carry out teaching practices in schools. Knowledge of the scientific method has many benefits, but not much information about the ability of prospective science teachers to the scientific method and its use to study the local environment. The purpose of this research is to find out precisely the knowledge of prospective science teachers about the scientific method and determine the right strategy in designing content and conducting lectures that teach material about the earth. The study was conducted on 83 prospective science teachers when they attended lectures on earth science. Data is obtained through written test activities that ask about understanding, procedures, and examples of the application of scientific methods in studying local environmental phenomena. The results of the study show that most prospective science teachers have an adequate understanding of the meaning and procedures of the scientific method. However, most students still cannot provide explicit examples of the operationalization of the scientific method in studying local environmental problems. For this reason, it is necessary to apply the right learning strategy so that students have the ability of the scientific method, one of which is to involve students in conducting scientific processes both in the laboratory and in real objects outside the classroom.
Social migration and environmental change in Lampung Indonesia
Authors: Pargito
Published: June 2020

Migration of people in Lampung Province occurs due to various social, humanitarian, and environmental reasons in the area of origin not allowing for self-development, as well as opportunities in new places. This study aims to 1) how does the social migration of the population occur in Lampung province. 2) How is the social change, economic and environmental transmigration in Lampung? The study was conducted by a qualitative research method of case study type. The research subject is imposed on respondents in snowballs. Research data collected by researcher using tools such as observation, in-depth interview and FGD (focus group discussion) and equipped with the document data. The results showed that transmigration programs were a form of a better population migration. In general, social migration programs have an impact on changes in physical development progress and changes in the social economic status of society. The process of interaction and integration of migrants and the old population (Lampung ethnic) encourages the development of the culture of society, although in the process there are still differences in views and conflicts. The migration of people in Lampung has also changed the environment in a better way, such as modern rural buildings, such as the center of government, Social activities Center, industry, business and trade.
The analysis of relatedness and interaction of impact on using house of quality for some cases as building, housing, and apartment in Indonesia
Authors: Hindrayani A , Purwanto
Published: June 2020

The essence of Environmental Impact Assessment (EIA) is on environmental impact management and monitoring to evaluate the effectiveness of environmental management. Meanwhile, environmental management and environmental monitoring describe a detailed direction of environmental management as a result of impact evaluation. In fact, impact evaluation is not fully reflected in the environmental management plan for some areas. This study aimed to identify the impact evaluation results recommended in the environmental management plan and environmental monitoring plan in some cases of EIA in Indonesia. Research method using house of quality. Sample in this research was EIA on some kinds of business plan which already had environmental permit, especially on building, housing, and apartment. The results showed that the impact interaction was not well analyzed, so that synergistic, cumulative, and/or diagnostic impacts were not entirely imposed on the proponent, but related to the cause of impact and authorized institution.
Bhetoh so’on batik feature creations: promoting the stonehenge van java in Suling Wetan Village, Cermee Sub-District, Bondowoso Regency
Authors: Wathon S , Oktarianti R , Ratnasari T , Puji R P N
Published: June 2020

Batu Susun tourism (Madura: Bhetoh Soon) or called “Stonehenge Van Java” in Suling Wetan Village, Cermee District is a newly opened tourist attraction in Bondowoso Regency. Nature tourism is still not widely known by the community so that there is a need for promotional efforts to be remembered more widely by tourists. One of strategies to promote the local object of Bondowoso is developing new batik motifs “bhetoh Soon” as a typical icon of Bondowoso Regency. Batik craftsmen in Suling Wetan village have pioneered batik production business since 2015 but have not been optimally developed so that it has not designed as a unique and creative batik product. The knowledge and skills of batik craftsmen in Suling Wetan Village need to be improved to create batik motifs “Bhetoh So’on” as a medium for promoting natural tourism in Bondowoso Regency. In general, the achievement of capacity building programs has been well implemented. These achievements included program socialization for partners, processing workshops and utilization of natural batik dyes, procurement of hand-held machines, training in making batik motifs “Bhetoh Soon”, and assistance to batik craftsmen regarding E-Commerce-based marketing system applications. The development of the typical batik creative industry in Wetan Suling Village is expected to increase their income while at the same time opening up new jobs for the surrounding community. The results of this activity can make Suling Wetan Village a pilot village that can develop successfully and independently in creating creative batik industries. Besides, the development of the creative batik industry in Sulet Wetan Village can lift the potential of tourism objects “Bhetoh So’on” in Bondowoso Regency.
A study on the potential of tsunamigenic earthquakes in Java Subduction Zones
Authors: Fauzi Y , Hartono  , Kongko W , Brotopuspito K S
Published: June 2020

Subduction zone is a source of tectonic earthquakes that has potential to cause a tsunami. The study aims to obtain the estimation of earthquake parameter as a tsunami generator. Earthquake parameters were analyzed by using the scaling law theory for thrust fault type in the subduction zone. This study employed three magnitude scenarios, namely 8.9, 9.0 and 9.2 taken from the National Earthquake Study Center (Pusgen) of Indonesia and Blaser’s Equation. The results of model design in a vertical displacement indicated that deformation occurred on the seafloor. The results of source modeling illustrated the variations in maximum vertical displacement values for all three scenarios, namely 4,123; 5,309 and 4,831 meters based on the Blaser’s equation and 3,517; 3,183 and 4,526 meters based on the Pusgen’s data. The results of the study indicated that the value of vertical displacement can provide an estimate of the tsunami wave height at sea level.
Development of Augmented Reality in Biotechnology processes as a Supporting Media for Science Learning Modules in Elementary Schools
Authors: Umamah N , Mahmudi K , Agustiningsih  , Suratno
Published: June 2020

Learning media is an important aspect of the teaching and learning process. This can be seen if, in enjoyable learning, it will generate student learning enthusiasm, and vice versa. If students can grow their enthusiasm for learning, in order to be creative, innovative and active students will increase. Biotechnology material is one of the high grade material in elementary school. So that requires a special behavior in learning. Augmented reality is considered as an appropriate supporting media in the learning module in elementary school. This is considering that Augmented Reality is a program that is able to call a database in the form of 3D animation that facilitates and helps students in the learning process. The content contained in Augmented Reality is an abstract and real modification in a biotechnology process. The outcome of the development of supporting media is an application that is able to call for data code optimization into instructions in biotechnology material.
Implementation of Green Building Concept and How to Manage it at SMAN 3 Jember
Authors: Fauziah U , Mutrofin  , Sumardi
Published: June 2020

The concept of green building is a practice that is focused on minimizing the environmental impact that arises with reference to the concept of ecological, social, and economic. In Indonesia, this concept is still not well implemented, especially in several government-owned school buildings. The purpose of this study was to evaluate the government-owned educational institutions whether they had met the green building criteria based on the Greenship-GBCI standard, as well as how the efforts of policymakers in the school were managed. This study uses a quantitative research design with an evaluative approach. While the evaluation model used is the CIPP model, the data presented comes from the results of observations and interviews. Primary data is obtained by direct observation in schools using GBCI parameters and interviews with policymakers in schools. Based on the results of the study, it was found that according to the criteria in each category the results were 27 points (23% ) and had not reached the minimum eligibility limit of 41 points. The management of school buildings is supported by the government through the active role of schools and school committees in the form of submitting assistance through the Special Allocation Fund (DAK) and community participation. Recommendations for schools need to be improved in several buildings to conform to the principles of green building.
The mechanism for collecting social capital at retail traders in the PG- Asembagus Market
Authors: Arifin R , Sukidin  , Suharso P
Published: June 2020

This paper porpused to describe the mechanism of collecting social capital at retail traders in the PG-Asembagus market used a qualitative approach. The location of this research was the PG-Asembagus market. The method of determining the subject of research using purposive sampling method. Data collection techniques or information used the method of in-depth interviews and observations. The data analysis technique used the interactive model of mile and hubertman analysis. Whereas to fulfill validity of the data in this study used triangulation techniques. The results of the research are social capital formed from the interaction between retailers in the PG-Asembagus market and customers have economic benefits that can be used as economic capital for these business people. It meant this social capital had turning into economic capital. The economic benefit of this social capital is in the form of basic food savings packages implemented by retail traders in the Asembagus PG market. The mechanism for collecting social capital is carried out by implementing a basic food savings package, where the collection process is obtained from paying members from a range of Rp1,000- Rp5,000 per day for 315-317 days. The money collected is used by business people as capital for their business..
The importance of updating the learning media for history teachers in vocational high schools
Authors: Khuriyah L , Naim M , Umamah N
Published: June 2020

The subjects of Indonesian History are closely related to the management of national character values such as nationalism, patriotism, national culture, national struggle, and others. The government program in the 2013 Curriculum has brought back Indonesian History in compulsory subjects (group A) in high schools including in vocational high schools throughout Indonesia. However, there are some discrepancies in the application of these subjects, between High Schools (SMA) and Vocational High Schools (SMK) such as the material, time allocation, handbooks, and others. This article uses a Qualitative research method with a case study design. The focus of the study was a government program that re-applied the subjects of Indonesian History in Vocational High Schools as compulsory subjects (Group A). The research limitation in this article is about the Teacher’s Book and Revised edition student books issued by the Ministry of Education and Culture in 2017.The results showed a discrepancy between the handbook (the teacher’s book and the student book) given at the Vocational School with the material and Basic Competence (KD) that should have been taught. This raises questions about the follow-up that should be done so that teachers and students in vocational schools can also have an Indonesian History handbook that is in accordance with what is needed in vocational schools.
Creative behavior of fisherman wives in the pesisir Village of the District Besuki - Situbondo
Authors: Budiarto H , Suharso P , Kantun S
Published: June 2020

This research was motivated by the poverty of fishing workers that occurred in Pesisir Village, Besuki District, Situbondo Regency. The uncertain income of fisherman laborers caused them into poverty. This condition requires several wives of fisherman laborers to be creative to help their husbands in fulfilling the economic needs of their families. In this study, several wives of fishing workers were found to be creative. This research is a descriptive study using a qualitative approach. The research location is in Pesisir Village, Besuki District, Situbondo Regency. The writing of this article uses a qualitative descriptive method. To determine the informant using the snowball technique. Data collection techniques in this study used the methode of observation and interviews conducted to informants, namely women who become fishermen laborers wives. The results of the study show that the role of wives in the family is very important. Beside being a housewife, also as a “treasurer” of the family. Creative behavior carried out by the wives of the fishing workers by making an effort in making crackers, fish paste and opening a grocery. The income from this creative behavior is able to fulfill the household needs and even pay the school fee of their children to senior high school and university degree. In addition, the wife of fisherman laborer is also motivated by the old paradigm that “a woman fate is in the kitchen” it should be able to prove that women can also be relied to fulfill their household needs. This becomes a benchmark to find out how big the role of the wife in the household. Therefore, the abilities and skills possessed must continue to be honed for a better life in the future.
Local wisdom for mangrove conservation and ecotourism: Case study from Wringinputih, Muncar, Banyuwangi
Authors: Purwowibowo  , Santoso B , Hendrijanto K , Hariyono S , Nufus B H
Published: June 2020

In some areas of Indonesia, local wisdom of coastal communities becomes an important factor and even determines the conservation initiative and mangrove-based ecotourism destinations; Wringinputih, Muncar, Banyuwangi, for instance. As a matter of fact, shrimp farms in this particular area were developed through reclamation in the 1980’s, and in consequence, many of the mangrove forest areas performed distinctly different functions. However, shrimp farming did not last long here as most shrimps suffered to death from white spot syndrome at the beginning of 1990’s. Thus, as most businessmen went bankrupt, they just left the shrimp farms and let the environmental conditions not taken a good care. Hence, in 1997 a number of community leaders of Wringinputih expressed their concerns and initiated local wisdom in the form of mangrove forests in favor of ex-location of shrimp farms. The research data were collected through descriptive qualitative method and in-depth interviews with some community leaders, the management of mangrove forests, selected individuals to obtain valuable information on local wisdoms related to the conservation of mangrove forests and the making of ecotourism destination. As a result, Wringinputih village community eventually restored mangrove forests in favor of the shrimp farms, and this particular success can apparently be applied elsewhere. Hence, with mangrove forest restoration, other natural resources grow exponentially and many mangrove-based tourism resorts are developed. The coastal communities can accelerate through many activities and job vacancies that they eventually can improve their social welfare.
Identification of tourism potentials in Ancient Bathing Sites of Pasuruan, Indonesia
Authors: Khakim M N L , Yuliati  , Winasari O , Asri S Y S
Published: June 2020

Penanggungan Mount keeps a million relics with their respective historical stories. One of them is patirtan or ancient bathing site of Pasuruan, it calls the Patirtan Belahan. This historical site better known as Sumber Tetek (breast) by the surrounding community. This historical site is located at the foot of Mount Penanggungan and as one form of a tourist attraction with three functions at once. Patirtan Belahan is an evidence that in this local area of the site was the territory of one of the kingdoms in the archipelago. Patirtan Belahan is still preserved by the community and widely introduced. The uses and functions of these temples also vary, both as tourism destinations, educational fields, and even religious activities. The purpose of this research is to find out the function of Patirtan Belahan in three fields, namely as a tourist spot, historical edification, and also religion as the main points of our study. Our research also seeks to reveal how the site is one of the mainstays in the Belahan Jowo - Wonosunyo Village, Gempol. In one tourism place, there are three functions at the same time that can enrich tourist insight, of course, this can be a separate focus that can attract tourists as well as its benefits for stakeholders who are directly related to the Patirtan Belahan site. The method used for this study are observation, interview and also library research. This study used a qualitative approach because it is descriptive and tends to be analytical.
Mapping education facilities based on geographic information system
Authors: Utomo L P , Saputra I A , Rahmawati  , Nisa Z
Published: June 2020

The purpose of this study is to determine the conditions of the community’s needs for facilities, spatial distribution, and capacity of educational facilities in the city of Palu. The study used a survey method with a spatial approach as the basis for its analysis and the Neighborhood unit approach as the basis for mapping educational facilities by utilizing GIS in data processing and analysis as a whole. The results of the study show that East Palu Subdistrict is the main service center, indicating that in Tatanga Subdistrict there is even distribution of development in the field of providing primary school education facilities, and the capacity of primary school capacity in Tatanga Subdistrict is categorized more.
The socio-cultural values of “bersih desa ceremony”:a cultural study at Simbatan Village, sub-district of Nguntoronadi, Magetan Regency, East Java
Authors: Malawi I , Chasanatun F
Published: June 2020

The Objectives of this research are to describe and analyze the socio-cultural values of the BersihDesa Ceremony at Sub-Village of SimbatanWetan, Nguntoronadi, MagetanRegency. The approach of this research is descriptive qualitative with ethnographic research design, by which the researcher conveys descriptively about socio-cultural phenomena which are drawn from real case directly, holistically and comparatively within a given space and time. The subjects are the members of society in question who are selected under purposive sampling technique. The type of data are primary and secondary ones which are drawn by observation, interview and documantation. The main instrument of the research is the researcher himself. The data are analyzed by coding model suggested by Strauss and Corbin and validated by triangulation technique. The analysis results reflects that: (1)The socio-cultural values are reflected in the society’s social awareness, responsibility, cooperation and group consensus. (2) The socio-cultural values are reflected in the societal togetherness. (3) Bersih Desa ceremony is as the form of syncretism between local wisdom and Islamic values. (4) The value of adikodrati (supernatural) has been trusted to give safety for the society from any kinds of disaster. (5) Art attraction which is conducted as medium of spiritual interaction covers mystic art values.
Learning experience from learning sources: exploiting geographic and historical potential of guerrilla sites in Wonokarto Pacitan as a source of historical learning
Authors: Sulistyo W D , Khakim M N L , Kurniawan B , Dicky S A
Published: June 2020

Pacitan is an administrative area in East Java. in this Regency there is a historical site of the struggle of General Soedirman. Guerrilla struggle during the physical revolution in Indonesia, in the period 1945-1949. These historical sites are in the form of open houses and monuments. one of the guerrilla sites used as a scheme in this study is a halfway house in Wonokarto. Its location in the hills is one of the geographical potentials that support it as a source of historical learning. The method in this research is collaboration, namely history and qualitative. The results of this study are historical learning model schemes with the use of Guerilla historical sites in Wonokarto.
Development of reqol (real quest outdoor learning) learning model to improve critical thinking skills (criticall thinking skill) in physics education
Authors: Astutik S , Mahardika I K , Supeno  , Indrawati  , Sugianto F
Published: June 2020

Learning curriculum in 2013 encouraging students to learn actively (Active learning) and train students to thinking skills needed in the 21st century learning, one of which is the critical thinking skills. Critical thinking skills in Java in the last three years is still relatively low, in addition to the model of learning that continues constantly evolving, demanding teachers to use instructional model inovativ. So do research ReQOL learning model development as one of the main efforts to develop a model that inovativ. The learning model ReQOL (Real Quest Outdoor Learning) is a learning model approach to learning outside the classroom (Outdoor Learning) that can provide real learning experience to students in learning activities. Syntax ReQOL learning model consists of five stages: 1) orienting; 2) Questing; 3) Mapping; 4) Sharing; 5) Evaluating. This type of research is the development of research using a model of development research and Nieven Ploom. Data obtained in the form of criteria for the validity, effectiveness, and student response. ReQOL learning model declared invalid by experts with a value of 90.2% validation criteria predictably very valid, and effective way to train critical thinking skills with high effectiveness criteria, namely 0.75, student responses to the lessons learned with the value 77.25%. So that ReQOL learning model can be used as one inovativ models that can be used by teachers to train students’ critical thinking skills.
Development of meaningful investigation laboratory (mil) learning model to improve critical thinking skills in physics earning
Authors: Astutik S , Mahardika I K , Supeno  , Indrawati  , Sudarti  , Zakaria A F
Published: June 2020

Learning models must be innovative in 21st century. One important component in the 21st century is critical thinking skills. Learning models require innovation, not only in the classroom. The Meaningful Investigation Laboratory (MIL) learning model is the solution for the based laboratory learning model that can improve the ability of critical thinking skills. The research method is research and development Nieveen’s Design. The results validation of MIL learning models and validation learning instruments is 92,5% and categorized as valid. There is an increase critical thinking skills after using the MIL learning model. This result is post-test higher than pretest with an N-gain value is 0.76 and categorized as high criteria. Students responses use MIL learning model is 84,52% positive responses and categorized very good. The critical thinking skills in the MIL learning model is found in every learning syntax. Critical thinking skills can be developed from: 1) Critical questions in precondition syntax, 2) Scientific experiment with critical thinking student workshhet in investigation syntax, 3) Reporting the results of investigations in critical class discussions in report syntax, 4) Reinforcement quiz are critical questions and analytical problems in the reinforcement syntax, and 5) Critical reflection from teacher to students and make conclusions together in reflection syntax.
The megalitic site in Pandan village Bondowoso as learning sources for historical learning
Authors: Arofah N , Swastika K , Sugiyanto
Published: June 2020

This research is historical research. This study aims to provide information on how to use megalithic sites as a source of history learning in schools. The results of this study indicate that there is relevance between the Pandan source site and the 2013 curriculum. The site as a source of historical learning can display pictures or videos of megalithic objects at the Sumber Pandan site in Grujugan Regency, Bondowoso Regency in the classroom. Of course this media is very useful to make students more eager to analyze the material taught not only to listen from the teacher’s explanation but also to be able to find out based on the pictures or videos displayed by the teacher so that learning becomes more enjoyable. Another way is to do tourism at the Sumber Pandan site, Grujugan District, Bondowoso Regency, this tourism work is carried out by the teacher by bringing students directly to the Sumber Pandan site environment. This tourism work is one of the methods carried out by teachers in teaching and learning history activities. This tourism work is more focused on presenting historical subject resources by bringing students to subjects that will be studied outside the classroom. This method makes learning creative. On these sites students are free to ask the site sitter or subject teacher for information.
The dynamics of the Lengger art in Prapah village, Panti, Jember 1900-2017
Authors: Layly S N , Sumarno  , Soepeno B
Published: June 2020

Lengger Art was adopted from a grandfather’s trip named Kek Mo. On the way to the tomb of Sunan Giri, Kek Mo found his lengger mask worn during Lengger’s appearance. The surrounding community accepts the presence of Lengger art. This can be seen when the Lengger art is displayed as an expression of gratitude for the coffee harvest during the Dutch colonial period in 1900. Along with the development of the Lengger Art era, this art developed. In terms of function, the beginning of its function as an expression of gratitude, developed into an entertainment and economic resource for Lengger art performers. In terms of number of players, the initial founding of the Lengger art consisted of 5 people, 1960 was 8, 2000-2003 was 11, and 2003-2017 was 15. Clothing and cosmetology underwent changes, which now developed into complete uniforms along with attributes. and makeup. Equipment, the first booth used offerings, mats, mowo (ember) and Lengger masks; In 1960, dolls increased, from 2000-2017 they did not use dolls. Musical instruments, starting with a drum and 2 flying, the 1960s presented 2 pieces of flying and gamelan. His appearance, starting from the players standing just dancing, 1960-2000 dancing with processions, 2000-2003 dancing to include stories, and 2003-2017 featuring 3 babag namely remo dance, dancing with storytelling, and saweran.
Optimization of distribution path for community group buying considering customer satisfaction
Authors: Wang Yong , Qiu Wei
Published: June 2020

Aiming at the problems of low efficiency, high cost and low customer satisfaction in the logistics distribution of community group purchase enterprises. In this paper, a VRP model with minimum total cost including fixed cost, transportation cost and penalty cost is established under the constraint of satisfaction function of distribution time window. The designed genetic algorithm is used to solve the model. Through the example verification, the total cost function designed in this paper can effectively reduce the cost and obtain good satisfaction. The algorithm is feasible and effective, providing a reference for enterprise decision-making.
Prediction of Road Traffic Accidents based on Rolling-optimized Grey Markov Mode
Authors: Xu Chengzhen , Zhang Heng , Gong Yanan , Sang Huiyun , Sun Guanglin , Chen Jing
Published: June 2020

In order to solve the problem that the accuracy of the accident prediction is affected by the time-effectiveness of the forecast data, the paper introduces the rolling optimization strategy based on the original data of the road traffic accident in the road section, and further establishes the rolling optimization-grey Markov dynamic prediction model. Using the Markov chain theory to explore the transition law between different states, the development trend of road traffic accidents volume is predicted, and the prediction accuracy of the random time series is further improved. Case analysis proves that the method has better prediction accuracy and practicability over a certain period of time, which can provide reference for road traffic accident prediction analysis and traffic safety early warning
Research on location model of emergency material storage warehouse based on generalized maximum coverage
Authors: Cheng Zhong-hua , Wang Qiang , Du Min , Chen Yong
Published: June 2020

It is of practical significance to analyze the support requirements of each rescue team for the rationality of warehouse location. In order to solve the problem that the traditional emergency material storage warehouse does not consider the difference of material guarantee timeliness of rescue team, a generalized covering location model is proposed. In this paper, the coverage is introduced to measure the quality of security services in each disaster area, and the maximum generalized coverage model is established to find the best location scheme of emergency material storage warehouse. Finally, the feasibility of the method is verified by an example, and the proposed method can better solve the location problem of emergency materials storage warehouse.
Optimization of Traffic Organization of loading ground based on transport loss
Authors: Yang Mu
Published: June 2020

From the point of view of the railway company, the consignor and consignor to establish a cost optimization target system to study the loading area traffic organization optimization problem. Considering the transportation cost of the railway company and the cargo delivery side of the transport loss, this paper combines different characteristics of different cargo vulnerability and constructs a loading area traffic organization optimization model to minimize the total cost of the integrated economy.. Finally, a corresponding example is given, and the model is solved by using LINGO software.
Research on planning and design of airport airfield area
Authors: Ke Li , Bin Shao
Published: June 2020

Airport status in city construction, regional layout, and transportation systems is analyzed. Influence of operation and management in military-civilian airports is pointed out from the perspective of airport planning and design and operation management. The airfield planning and design are analyzed from the capacity of runway, taxiway, and apron. The displaced threshold can meet the needs of the aviation business, while taking reconstruction and expansion of airport.
Evaluation of compressive strength investigation on job mix test object and core drill test object
Authors: Sitorus Torang , Jaya Indra
Published: June 2020

The test sample in the core drill is a hard concrete test (ASTM C-39) method by taking samples of concrete cylinders from areas of compressive strength is doubtful. Sampling is done by drill tool which drill is in the form of “pipe” from diamond, so that the concrete sample is obtained in the form of cylinder. Building made of concrete construction, it must be required corresponding the required strength through planning determined by testing the quality of concrete on the job mix SNI test standard, but in the process of concreting that does not be corresponding the method and the conditions that must be obeyed often results in strength the concrete construction that has been built does not achieve the desired strength. When the existing concrete building strength checks are carried out, it is necessary to evaluate how much the error or the difference in the results of the test on the concrete quality of the planning and quality of hard concrete that is ready to be built. For this reason, one of the hard concrete strength tests is done by using the core drill method.
Analysis of energy efficiency in the Krueng Raya TBBM Pertamina building using the energy audit method
Authors: Sitorus Asril , Yurisman Edy , Susilo Hendra , Ambarita Himsar , Nur T B
Published: June 2020

Energy audit is a technique to determine anytime, according to, and how to use energy in its facilities, and to take advantage of opportunities to improve efficiency. In this study an audit was conducted in the Pertamina TBBM Krueng Raya office building. This study discusses calculating the Energy Consumption Intensity (IKE) of a building, the thermal comfort level of a building so that it can realize a green building and be applied to other BBM terminal installations. The results of survey data, the pattern of electric energy use combined with Krueng Raya TBBM is 42.617 kWh/year in which the building area is 259.18 m2. The results of study, obtained IKE at the Krueng Raya TBBM building amounted to 164.43 kWh/m2/year. Although by default the category of saving building criteria, but the visual comfort aspect questions SNI 03-6197-2000 and thermal SNI 03-6390-2000 is not allowed.
Effect of recycle ratio on methanogenic anaerobic digestion of palm oil mill effluent (POME) in a stirred tank reactor assisted by ultrafiltration membrane into biogas in transition conditions
Authors: Sidabutar R. , Trisakti B. , Husin A. , Irvan
Published: June 2020

The purpose of this study is to increase the conversion of biogas production using digester type CSTR by recycling the effluent through ultrafiltration membrane at transition conditions (45°C). In this research was investigated the effect of recycle ratio on the pH profile, alkalinity, production, and biogas composition produced. Initially, the suitable loading up was determined by varying HRT at 25, 15, 10, and 6 days in 2 L CSTR with agitation rate 250 rpm, pH 7 ± 0.2, and at temperature of 45°C. Furthermore, the effect of the recycle ratio was determined by varying the recycle ratio, i.e. 0, 15, and 25%. Analysis of total solids (TS), volatile solids (VS), total suspended solids (TSS), volatile suspended solids (VSS), and chemical oxygen demand (COD) were carried out to study the changes of organic compounds that were converted into biogas. Gas analysis is also carried out by measuring the volume and composition of the biogas produced. The highest total biogas production was achieved at 25% recycle ratio of 33.15 x 10-2 L/g.VS.day, with the composition of methane (CH4), carbon dioxide (CO2), and hydrogen sulfide (H2S) were 79; 19; and 0.006% respectively.
The capability of buoyancy weighing bar method in determining the separation time of biodiesel and glycerol at various concentrations
Authors: Tambun R , Banjarnahor I J , Silaen A N
Published: June 2020

This study aims to examine the ability of the buoyancy weighing bar method in determining the separation time of biodiesel and glycerol at various concentrations. The comparison of biodiesel and glycerol concentrations studied are 99%: 1%; 98%: 2%; 97%: 3%; 96%: 4%, while the type of rod used is made of iron with a diameter of 10 mm and length of 210 mm. This research is conducted at room temperature and using gas chromatography analysis result as a comparison. The results are also compared with aluminium rods with diameter of 5 mm and 15 mm diameter, also compared with aluminium rods with length of 160 mm, 110 mm, and 60 mm diameter. From the results obtained, it is known that the buoyancy weighing bar method can predict the separation time at various concentrations of biodiesel and glycerol.
The effect of car drivers risk perception and driving behaviour towards accident risk: a case study
Authors: Nurul Huda Listiani , Ismail Said
Published: June 2020

A traffic accident is an unexpected and unintentional event on a road involving vehicles with or without other road users resulting in human casualties and/or property losses. Traffic accidents generally occur due to various factors such as the user’s inadvertent actions, violations, road conditions, vehicle conditions, weather, and obstructed views. Medan City has a high accident rate of 5,686 cases caused by driver factors. The problem under study is the alleged relationship between risk perception and driving behavior. The purpose of this study is to look at the relationship between driving behavior and risk perception that can cause traffic accidents. Data collected using the instrument in the form of a driving behavior questionnaire and risk perception questionnaire. The analysis is done by statistical analysis through SPSS software to test the validity and reliability of the data, radar map analysis to see the attributes of driving behavior with the highest mode, the analysis of the correlation of driving behavior and risk perception with the SPSS software as a whole, and to analyze the Structural Equation Model path (SEM) to see the partial relationship between variable attributes in a multivariate manner. The results of this study indicate that there is a significant relationship between 3 (three) driving behaviors that are using a cell phone, violating traffic rules, and overtaking other vehicles to the driver’s risk perception so that it has the potential to cause a traffic accident and it can be concluded that the hypothesis the researcher accepted (H0).
INALUM environmentally friendly strategy by reusing spent anode (butt) management
Authors: Antonio Sinaga Dolfy
Published: June 2020

To implement vision 2025, INALUM should pay attention to environment aspect and one of the strategies is reusing waste material resulted after the process which in this case reusing spent anode or well known as anode butt. INALUM produces + 40,000-ton butt/year as accounted to production cost that is classified to spend money. Anode butt has contaminated Cryolite (Na3AlF6) during the electrolysis process thus changing the quality. To optimize production cost, those butt materials are reusing as raw material to produce anode. Usage of anode butt as technically lead to deleterious anode quality and electrolysis cell performance. Nevertheless, by internal strategy and well operated by INALUM, not significantly impact gained after using anode butt as anode raw material. Butt cleaning process on the Rodding plant plays an important role in butt quality. By through butt cleaner which has 2 compartment rooms that will be passed through to be cleaned. First room is cleaning room and next room is air blow room are able to produce efficient anode butt to be reused as anode raw material. Butt quality produced by butt cleaning system is highly better than typical range and hence anode quality specifically residual reactivity (RRCO2 and RRO2) still acceptable to INALUM standard. By using 30% butt ratio to produce anode, INALUM can save production cost by + 180 USD/Anode and that is huge saving to average anode production 112,000 anode/year.
Coffee bean skin waste extraction for silk dyeing
Authors: Luftinor  , Herlina Netti , Santika Kurniati Ami
Published: June 2020

Coffee bean skin waste has been used as a coloring agent in the process of dyeing silk threads by varying the concentration of coffee bean extract extracts in 4 treatment stages, each 50 g/l, 100 g/l, 150 g/l and 200 g/l and varying the fixation solution lime also in 4 levels of treatment each 25 g/l, 50 g/l, 75 g/l and 100 g/l to obtain 16 kinds of silk thread colors. The parameters tested included color aging, color fastness to washing, rubbing, sweat and light. The aim of the study was to obtain the best treatment from the coloring process carried out, while the overall test results met the SNI quality requirements for how to test color fastness for washing, sweat and rubbing (BSN, 1989), except the results of the test for color fastness to light. The best treatment was obtained at the extraction concentration of 150 g/l coffee beans and the concentration of lime fixation solution 75 g/l produced a color aging K/S 20,93, color fastness to washing value 3-4 (enough) for discoloration and 4 (good) for color staining, color fastness to rubbing value 4 (good) for dry rubbing and 3-4 (enough) for wet rubbing, color fastness to perspiration value 4-5 (good) for acid and base rubbing as well as resistance color fastness to light values 2-3 (less).
Adsorption capacity of heavy metal cadmium using white sand as adsorbent
Authors: Haryanto Bode , Butarbutar Michael JC , Sinuhaji Tubagus R F. , Tarigan Krissandarta , Sinaga Chairina
Published: June 2020

The aims of this study are to know the adsorption ability of white sand from Medan Indonesia to adsorb cadmium ions (Cd2+) from the solution at pH 4.5. The variables were on different size of white sand, the rpm of shaker and Cd concentrations. The first step was to determine the optimum contact time and adsorption capacity. The adsorption capacity on 70 ppm Cd ions with 40 mesh sand size and stirring speed 150 rpm is 38% after 100 minutes operation time. Impact of sand size 10 mesh, 20 mesh and 40 mesh is possible to increase the adsorption capacity. Increasing the rpm will impact to interaction stability the Cd ion on sand surface. White Sand has ability to interact with metal ions dissolve in solution.
Effect of various commercial of Na2SiO3 on compressive strength of Fly ash-based alkaline activated mortar
Authors: Elbasir Otman M. M. , Mijarsh M.J.A. , Azmi Megat Johari Megat , Mashri Mohamed O. M. , Karolina Rahmi , Arifin Ahmad Zainal
Published: June 2020

This study aimed to assesses the effect of various commercial Na2SiO3 on the compressive strength (CS) of alkaline activated fly ash mortar (AAFM). The three mixture of alkaline activated mortar (AAM) C1, C2 and C3 were prepared from the source material of fly ash and alkaline activator solution (AAS). The initial AAS was comprised of NaOH (10M) and various grade of Na2SiO3. The various grades of Na2SiO3 were characterized by their SiO2/Na2O molar ratio of 2.0, 2.2, and 3.3, respectively. The sample from each mixture was characterized based on the CS and microstructure changes using useful tools of XRD and FTIR analysis. The results obtained indicated that the highest CS achieved among the three mixtures were 48.23MPa of mixture C2 prepared with SiO2/Na2O molar ratio of 2.2. This was mainly due to higher binder formation (N-A-S-H gel type) and a higher rate of reaction of the main source material. This result is in line with XRD and FTIR analysis results finding.
The effects of aminopropyltriethoxy silane on tensile and rheometric properties of silica-filled natural rubber vulcanizates
Authors: Surya I. , Ismail H.
Published: June 2020

By using a semi-efficient vulcanization system; the effects of aminopropyltriethoxy silane on rheometric and tensile properties of silica-filled natural rubber (NR) composites were investigated. The NR composites were filled by silica filler at a fixed loading at 30.0 parts per hundred rubber (phr). The aminopropyltriethoxy silane was incorporated into the silica-filled NR composites. The aminopropyltriethoxy silane loadings were 1.0, 3.0, 5.0 and 7.0 phr. It was found that aminopropyltriethoxy silane functioned as a co-curing agent which reduced the scorch and cure times of the silica-filled NR composites. The higher the aminopropyltriethoxy silane loading, the shorter the scorch and cure times were. It was also found that aminopropyltriethoxy silanecaused in modulus and tensile improvements, exclusively up to a 5.0 phr of loading. The 5.0 phr of aminopropyltriethoxy silane was the optimum loading.