Indonesia Conference Directory

Corresponding Author
Hazik Mohamed

Institutions
Stellar Consulting Group, Singapore

Abstract
There has been increasing attention on sustainable practices and in particular in financing socially-responsible projects through impact investment. The focus of these impact investment financing has been on performance-driven risk-sharing in order to ensure accountability to the execution of the program according its initial intention. We feel that this should not only be limited to impact investments but also in every substantial investment that is being made. In this paper, we recommend putting sukuk and bonds on the blockchain to enable transparency and put forth steps to automate cumbersome processes in sukuk/bond issuances in order to reduce costs and improve efficiency. We leverage similarities and discuss significant advantages of using technology to operationalize accountability and instil confidence in properly structured and executed financial instruments. We make these recommendations on the basis of fulfilling a gap in sustainable practices, through impact-focussed sukuk and bond issuances.

Keywords
asset-backed financing, decentralized credit rating, risk-sharing instruments, sustainable finance, trust tokens

Topic
Islamic Capital Market

Link: https://ifory.id/abstract/kmpCnPVfLQK3

Corresponding Author
Maulidah Narastri

Institutions
a) University of 17 Agustus 1945 Surabaya
jalan Semolowaru Nomor 45 Surabaya
* maulidah[at]untag-sby.ac.id
b) Universitas Islam Negeri Sunan Ampel Surabaya

Abstract
The purpose of this article is to find out how harmony between the era of financial technology is compared with Islamic principles in Indonesia. Financial technology that is intended for humans to meet ever-increasing needs, increasingly rapid human mobilization, as well as increasing human activity. The method used in the discussion of this article is a critique of the phenomenon that developed in the era of financial technology in Indonesia as a developing country that supports the era of financial technology from developed countries. The literature used in this paper is published by national and international scientific journals and is supported by scientific books from various scientists. This article is expected to provide additional knowledge, become an opening point for further research, and be made as a guide in conducting business at various levels that discuss using financial technology.

Keywords
financial technology, islamic perspective, regulation

Topic
Islamic Finance Technology (Shariah Fintech)

Link: https://ifory.id/abstract/kfzGwXKbR3u9

Corresponding Author
Reni Reni

Institutions
Ikip Siliwangi

Abstract
ABSTRACT In mathematics learning many teachers complain about the students low ability to apply mathematical concepts. This can be seen from the many mistakes students make in understanding mathematical concepts so that they ignore mistakes in working on problems that can result in low student learning achievement (scores) both in daily tests, semester tests, and final school exams, even though in the classroom learning process is usually the teacher gives the task (stabilization) continuously in the form of problem training. The real conditions in the implementation of the exercises provided are not fully able to improve students abilities in applying mathematical concepts. The low quality of learning can be interpreted as being less effective in the learning process. The cause can come from students, teachers and facilities and infrastructure. Based on the problem, the researchers tried to find a solution by examining the Improvement of Mathematics Learning Achievement with the Problem-Based Learning Method in the Linear Program Discussion. The problems that the researcher revealed were: 1) Can the Problem-Based Learning method improve students ability to work on practice questions on the subject of Linear Program in class X-TKJ4 SMK 6 6 Garut academic year 2018/2019? 2) Can the Problem-Based Learning method improve student learning achievement on the subject of Linear Program in class X-TKJ4 SMK 6 6 Garut academic year 2018/2019? 3) How can the impact of the Problem-Based Learning method improve student learning achievement on the subject of Linear Program in class X-TKJ4 SMK 6 6 Garut academic year 2018/2019? The method used in this study is the test method, questionnaire, and observation with data analysis techniques, namely descriptive analysis. The results that the researchers got were: 1) Problem-Based Learning Method can increase the activity and creativity of students in learning opportunities in class XI, for active discussion there was an increase of 7.69% and activeness in recording lessons increased by 8.40%. 2) Problem-Based Learning Method can improve student learning outcomes in a classical way this is seen during the study an increase of 6.19%, and an increase of 39.30% from pre PTK to post PTK. 3) Problem-Based Learning Method can increase interest This is evidenced by the increase of 16.53% from pre PTK to post PTK.

Keywords
Crical thingkhing ,Problem Based Learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/FAXKPrpCEvmR

Corresponding Author
imas suwartini

Institutions
IKIP Siliwangi

Abstract
The low level of mathematical problem solving abilities of students, especially in the form of flat-side space due to lack of attention and involvement of students in the learning process, students difficulties in understanding the problems of constructing flat side spaces in the form of stories, less innovative learning and less active and creative students in constructing problem solving ideas. Therefore, a learning model is needed that can improve students mathematical problem solving abilities, namely through the Problem Based Learning model. This study aims to describe the activities of students while following learning, and improving students mathematical problem solving abilities. This research is a class action research. Data is collected through tests and observations. The data analysis technique uses descriptive statistics. Based on the results of the study, it was found that: (1) Student activities during the implementation of the problem-based learning model were active; (2) Demonstrating an increase in students abilities in solving mathematical problems, seen from the results of student tests increasing individually and classically after the application of problem-based learning models. So it can be concluded that to improve mathematical problem solving abilities students should use the Problem Based Learning model.

Keywords
Problem Solving, Build Flat-Side Space, Problem Based Learning

Topic
Mathematics Education

Link: https://ifory.id/abstract/8YnucZdKqDgC

Corresponding Author
Julita -

Institutions
Universitas Pendidikan Indonesia

Abstract
The aim of this study is to comprehensively analyse the improvement of mathematical lateral thinking ability of high school students as an outcome of quantum learning based on creative problem solving, both viewed as a whole and each level of initial mathematical ability (high, medium, and low), and gender (male and female). This study used a quasi-experimental method with a pretest-posttest control group design. The study population was high school students in the city of Bogor, while the sample was taken from four classes in a school. The data obtained through tests of lateral thinking skills and mathematical initial ability data, as well as the results of observations and interviews. The results showed that students who received quantum learning based on creative problem solving had a higher mathematical lateral thinking ability than students who received direct learning, whether as a whole and each level of initial mathematical ability or as every gender.

Keywords
mathematics, lateral thinking, quantum learning, creative problem solving

Topic
Mathematics Education

Link: https://ifory.id/abstract/FxPa7XHGTqfW

Corresponding Author
Afif Prabowo Jatiandana.

Institutions
(a) Oceanography_Earth Science Department, Faculty of Earth Science and Technology (FEST), Bandung Institute of Technology (ITB), Jl. Ganesha 10, Bandung 40132, Indonesia

*afifprabowoj[at]gmail.com
*afifpj[at]students.itb.ac.id

Abstract
Indonesia is a region that is directly adjacent to the Pacific Ocean and the Indian Ocean which allows a thermal front phenomenon. The purpose of this study is to identify the presence of thermal fronts based on seasonal variations and inter-annual variations in Indonesia. The data are Sea Surface Temperature (SST), Ocean Nino Index (ONI), and Dipole Mode Index (DMI) with a span of time from January 2007 - December 2017 (11 years). The SST data is a level 3 Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) satellite image data with a resolution of 4 km. SST data processing uses remote sensing techniques and Geographic Information System (GIS). The results of this study indicate that the distribution of SST and thermal fronts are influenced by seasonal variations and inter-annual variations. The highest average thermal front event in Indonesian waters occurred in a combination of El-Nino and Positive IOD conditions. The highest average thermal front incidence in Indonesian waters also occurred during the East Season, while the smallest average occurred during the Transition Season II. During West Season, Transition Season II, and East Season, the largest number of thermal fronts was found in Western Indonesian Waters. Meanwhile, in the Transition Season I, the largest number of thermal fronts was found in Central Indonesian Waters.

Keywords
thermal front, SST, remote sensing, seasonal and inter-annual variations

Topic
Marine Geodesy and Satellite Oceanography

Link: https://ifory.id/abstract/XJbgxF2hDPdY

Corresponding Author
Wiwin Windupranata

Institutions
1Research Group of Coastal, Ocean and Maritime Engineering, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung
2Center for Earthquake Science and Technology, Research Center for Disaster Mitigation, Institut Teknologi Bandung
3Research Laboratory of Hydrography, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung
4Study Program of Geodesy and Geomatics Engineering, , Faculty of Earth Sciences and Technology, Institut Teknologi Bandung

Abstract
The Southern Coast of West Java Province in the Java Islands is one of prone and exposed area to tsunami hazard. It has about 428 kilometers coastline length, covering 5 administrational regencies (i.e. Sukabumi, Cianjur, Garut, Tasikmalaya, and Pangandaran). It is a strategic area that support many economic activities including tourism, fisheries, electricity power plants, agricultures, markets as well as social factors such as coastal villages, schools and other public facilities. The existence of this strategic area is threatened by the potential for a tsunami disaster mainly from megathrust along the Southern Coast of Java Island. On 2006, a tsunami earthquake of M7.7 occurred off Pangandaran Regency with tsunami height of 5-8 meters and inundated about 500 meters along southern coast of West and Central Java Province. The tsunami caused more than 600 casualties and damage to buildings, public facilities and insfrastructure. Yet, the Indonesia National Earthquake Source and Hazard Map suggest a bigger threat of a plausible M8.7 – M9.2 megathrust earthquake off Java island. This research aims to analyze and map potential areas affected by the tsunami in the South Coast of West Java Province based on numerical modelling carried out with Cornell Multi-grid Coupled Tsunami Model (COMCOT) v1.7 based on the several megathrust earthquake scenarios in southern off West Java. The results of tsunami modelling show that the highest impact is generated in the Sunda Straits & West Java - Central Java Megathrust Scenarios with highest tsunami inundation and the fastest travel time occurred in Cianjur Regency with 26,7 meters height and estimated arrival time of tsunami wave approximately 10 minutes after the mainshock, while the farthest inundation distance is estimated in Sukabumi Regency about 5.8 kilometers from the coast due to existence of river. As an impact of tsunami in socio-economic aspect, Pelabuhan Ratu District in Sukabumi would be the most vulnerable due to high economic activities and number of inhabitants.

Keywords
Tsunami, Megathrust Earthquake, Southern Coast, West Java Province

Topic
Coastal Degradation and Coastal Hazard

Link: https://ifory.id/abstract/YX9BCLUtavcN

Corresponding Author
khaled nour aldeen

Institutions
Master Program Of Islamic Economics Program, Postgraduate School, Airlangga university, Surabaya , Indonesia1
Faculty of Economics and Business, Airlangga University, Surabaya, Indonesia2,3

Abstract
Green banking is a term which is trending for the time being, it is banking from which a nation gets environmental benefits of implementing its standards. The aim of this study is to examine and evaluate XYZ bank-s practices in terms of friendly- environment behavior in Syria. The qualitative approach was used in the form of semi-structured interviews under the phenomenological approach for the study-s purpose. The main finding of this research bank does not practice green banking in a big way. This research is a pioneering attempt towards green banking practices in the Syrian context. The in-hand study revealed the importance of increasing the bank-s employee awareness of green banking practices. Moreover, strict policies should be declared by the authorities.

Keywords
Green Banking, Environment-Friendly, Syria

Topic
Environmental Economics

Link: https://ifory.id/abstract/jPkHWmhYNC78

Corresponding Author
Adi Rahman

Institutions
1Computer Science, Faculty of Math and Science, State University of Jakarta Rawamangun Muka Street No 1, Jakarta 13220
2 Tourism, Faculty of Social Science, State University of Jakarta Rawamangun Muka Street No 1, Jakarta 13220

Abstract
Mathematics taught in school is known as school mathematics where the study of material has been adjusted to the needs of students. Nonetheless, Mathematics is actually indirectly known in the community. Indirectly the community has known mathematics in their daily activities such as counting, measuring and even producing products such as woven. This habit is a culture that can be associated with mathematical concepts better known as ethnomatematics. One example is the concept of the roof of the kebaya house which is a traditional house of Jakarta. The roof of the house consists of a triangle and a trapezoid. This can indirectly introduce the concept of flat wake to students. This study aims to design learning media applications with mathematical concepts that exist in several cultures in Indonesia that can be used as learning resources for mathematics. The research method used is research and development (RnD). To get a proper application, testing is done using blackbox testing. This application is expected to make ethnomatematics a basis for learning mathematics in the modern era.

Keywords
Applications, Culture, Ethnomatematics

Topic
STEM Education

Link: https://ifory.id/abstract/9NEq8PQLrFjY

Corresponding Author
Mukhlisah Mukhlisah

Institutions
1Basic Education, Graduate School, University of Education Indonesia Bandung
2Universitas Pendidikan Indonesia, Bandung, Indonesia

Abstract
Abstract This research originated from the concern of researchers looking at the activities of students in schools that still use plastic during snacks in the school canteen. Excessive consumption of plastic results in a large amount of plastic waste. Because plastic is not derived from biological compounds, plastic has properties that are difficult to degrade (non-biodegradable). Plastic waste has a negative impact on the natural environment, which most people use as a means of fulfilling their daily needs. Seeing these conditions, it is necessary to have a learning that can foster the ecological awareness or ecoliteracy of students by utilizing nature which in this case is the oen iboh plant (iboh leaf) which is used as a container for food and snacks for students in the school canteen. Efforts to improve the ecoliteracy of students through the use of surrounding natural resources as a source of learning in Science learning in grade IV SD IT Nurul Ishlah Banda Aceh. The researcher wanted to find out the parents response to the activities of students in the school in the utilization of natural resources for increasing ecoliteracy. From the results of preliminary observations carried out on Science learning activities in class IV SD IT Nurul Ishlah Banda Aceh. This study uses a qualitative approach with descriptive methods. The subjects of this study were parents of fourth grade students of SD IT Nurul Ishlah Banda Aceh. Sources of research data are: (1) written sources, (2) oral sources, (3) documents, and (4) records. Data collection techniques are observation, interviews, and documentation. The process of data analysis research is carried out with qualitative descriptive techniques. Based on the results of the study concluded, it is recommended for parents to motivate students to use nature in the environment as an effort to increase the ecoliteracy of students from an early age.

Keywords
Parental response, utilization of natural resources, ecoliteracy

Topic
Science Education

Link: https://ifory.id/abstract/uVTJej7hNXwm

Corresponding Author
Sultan Syah

Institutions
a)Doctoral Program of Economic and Business Faculty,
Brawijaya University, Malang, 65142, Indonesia
* sultanakuntan[at]gmail.com
b)Brawijaya University, Malang, 65142,Indonesia

Abstract
The purpose of this study is to provide an understanding of the role of blue accounting in transforming plastic waste into environmentally friendly energy to meet human needs. This study uses qualitative methods with ethnomethodology approaches. Data is gained through observation, documentation and daily conversations. Blue accountings research provides a solution to overcoming the problem of plastic waste at sea. Where waste can be converted into fuel oil with the composition of each 10 kilograms of plastic waste, producing 6 liters of diesel fuel, 2 liters of gasoline and 2 liters of fuel. Application of this research: this research may be useful for environmental accounting. The novelty/originality of this study is overcoming the problem of plastic waste on land and at sea

Keywords
Blue Accounting; Zero Waste; Plastic

Topic
Accounting

Link: https://ifory.id/abstract/r4HFg9MGnjQw

Corresponding Author
Sarwanto -

Institutions
Universitas Sebelas Maret

Abstract
Agriculture is the livelihood of the Javanese people in general. From farming to serving food at the dinner table, everything is done with a high science process. This study identifies daily work that can be used as a source of learning for middle school students. This research is ethnographic qualitative research. This research was conducted in Central Java, especially in Solo Raya. The results of this study indicate that the ability to control variables through simple experiments has been carried out. The results of the experimental data are not systematically arranged, but only use memory. Not all western science process skills develop in the Javanese community. Adaptation in science learning needs to be done so that there is a match between Javanese science process skills and western science process skills.

Keywords
indigenous science process skill, javanese science, ethnographics

Topic
SCIENCE EDUCATION

Link: https://ifory.id/abstract/Aqpt3Tx8uJZN

Corresponding Author
Umar Fitra Ramadhan

Institutions
Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru, Depok, 16424, Indonesia

Abstract
Indonesia, being a tropical country, has a high photovoltaic (PV) energy generation potential that can help meet demand due to impending shortage power supplies in the coming years. The shading effect is a negative effect that causes the Photovoltaic power output to drop from its normal state. The performance of Photovoltaic Panels (PV) is a shared module surface exposed to sunlight. Shading effects a result of the influence of clouds, but the influence of these clouds causes a lack of uniform illumination of sunlight received by the photovoltaic. This is condition called Partial Shaded. Partially shaded PV systems cannot operate at maximum efficiency because of shadows cast by surrounding structures, foliage and cloud cover. This paper describes an experiment on PV output for the irregularity of sun irradiation. Characteristics of I-V can be influenced by partial shading effect. The voltage and current of PV solar cells will drop from partial shading effect experiment which consists of 20%, 40%, 60%, 80% and 100% shading area

Keywords
Photovoltaic; Partial Shading; Solar radiation; Power Output

Topic
Electrical Engineering

Link: https://ifory.id/abstract/64CUnymZtVQR

Corresponding Author
Bertha Maya Sopha

Institutions
Industrial Engineering Program, Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada (UGM)

Abstract
Incompatible aid supplies, in which received aid items do not match with the need of the victims, appears to be one of persistent problems in relief operations. The mismatch can be argued due to that the need of aid supplies may vary over time and the nature of disaster creates different need of aid items which are not available in standard survival kit. The purpose of the present paper is therefore to empirically identify aid items that should be available in survival kits by considering time-after-disaster and the nature of disaster. A survey was conducted in Bantul and Sleman districts where earthquake with a magnitude of 6.5 Richter scale and volcanoes eruption have occurred respectively. A total of 120 respondents, consisting 65 respondents from Bantul district and 55 respondents from Sleman (Cangkringan), participated in the study. The respondents were asked to rate the urgency level of the aid items during the first and the second week after disaster. Results indicate the time after disaster, the nature of disaster, and the culture are found to be significant factors influencing the required items of the survival kit. Furthermore, the required aid items during the first week are significantly different than those during the second week after disaster. It is also worth mentioning that the type of disaster determines crucial specific aid items that should be provided in the survival kit.

Keywords
survival kit, aid items, earthquake, volcano eruption, survey

Topic
Industrial Engineering

Link: https://ifory.id/abstract/u7AYUJk4faVH

Corresponding Author
Elya Kusuma Dewi

Institutions
Fakultas Hukum, Universitas Muhammadiyah Cirebon
Jalan Tuparev Nomor 70 Cirebon, Jawa Barat 45153, Indonesia

Abstract
Abstract This non-doctrinal research describes the practice of ignoring the value of justice and logical truths rather than eradicating corruption among high-ranking state officials. The aim of describing an ambitious implementation of criminal justice can be counterproductive, that is not only injustice, but rather the denial of the premise of material truth as the character of the rationality of the performance of criminal law. Primary data from interviews with actors and informants, and secondary data in the form of case documents were analyzed qualitatively with hermeneutic interpretation techniques. The results of the study show that ambitious corruption eradication has the potential to damage the logic of criminal justice and curb the conscience of law enforcement.

Keywords
Ambition to Eradicate Corruption, Material Truth, Conscience

Topic
Criminal Law

Link: https://ifory.id/abstract/CgAPwmZ4eYfd

Corresponding Author
Sartono Marpaung

Institutions
1Remote Sensing Application Center, Indonesian National Institute of Aeronautics and Space (LAPAN), Jl. Kalisari No. 8 Pekayon, Pasar Rebo Jakarta Timur, 13710.
2Global Fishing Watch, 1025 Connecticut Ave, NW Suite 200, Washington DC 20036, USA.
3Centre for Deep-Sea Research, Indonesian Institute of Sciences (P2LD-LIPI), Jl. Y. Syaranamual, Guru-guru Poka, Ambon Maluku 97233

Abstract
The study of potential fishing zones (PFZ) in Indonesia has been recognized for decades after the introduction of remote sensing technology for fisheries in the 1970s. Sea surface temperature (SST) and Chlorophyll-a concentration are the two main oceanography parameters used to determine potential fishing zones. Despite the popularity of this study, from which many research institutes produce such maps, there is still a big gap in understanding the accuracy of the map with respect to the vessels- behavior. One of the main reasons is the high-cost on validation methods such as conducting field surveys or engaging onboard observers. Furthermore, these methods can only cover a limited number of vessels and locations resulting in inaccuracy of PFZ. Using the available Indonesian VMS data, we can tackle those limitations. We analyze and match the VMS fishing efforts data against PFZ map based on time and distance variations. The PFZ map was sourced from LAPAN for a 1-year period in 2018 covering 6 project areas in the Java Sea, the Sulawesi Sea, the Maluku Sea and the Banda Sea. The VMS fishing effort data comes from Global Fishing Watch fishing algorithm which is run over Indonesian VMS data. The result showed that there were 1,476 vessels confirmed to fish around PFZs within the time variation ranging 1-3 days. The distance of the vessels fishing from the PFZ was less than 6 km. The study suggested that PFZ map is quite decent in forecasting the fishing ground locations. The result can be beneficial in developing the capture fisheries technology by providing science-based advice for reducing the operational cost in searching for the fishing ground.

Keywords
PFZ, VMS, Validation, SST, Remote Sensing

Topic
Marine Resources, Conversation and ICZM

Link: https://ifory.id/abstract/CAXk2GyrBmux

Corresponding Author
mohamad donie aulia

Institutions
Universitas Padjadjaran, UNIKOM

Abstract
Mutual fund is one of the alternative to do an investment especially for the investors that lacks in knowledge about investment and lack of time but still manage to produce great number of benefits. As one of the vehicle to do an investment, mutual fund is a place for the investors to raise funds that later will be invested to stock portfolio by the investment manager. Therefore, the investor doesn-t have to think much about the stock portfolio. Mutual fund is stated by the government in Law no. 8 about Stock Market. This study examines the advantages of mutual fund as an alternative to do an investment and the importance of doing an investment. The level of Indonesian societys literacy regarding financial service products is classified as still small. Even mutual funds are capital market financial services products with the lowest literacy rates. The very small number of mutual fund investors is a special challenge for the capital market industry

Keywords
Mutual fund, stock market, investment

Topic
Management

Link: https://ifory.id/abstract/2kvELxR7fc8W

Corresponding Author
Melly Maulin Purwaningwulan

Institutions
Unikom

Abstract
The increased of internet usage in Indonesia has encouraged the phenomenon of online shopping into needs or hobby for the social network users, especially students. This research aimed to analyze and discover the uniqueness of online shopping behavior among Indonesian students consist of the stage of problem identification, information search, alternative evaluation, purchase decision, and post-purchase behavior. This research used qualitative approach with descriptive method. Informants consist of online shop owner and students who come from various departments and universities in Indonesia. Result obtained that Indonesian students began to shop online in 2010-2011. They used online shopping applications such as Lazada, Tokopedia, and also in the online shop which has Instagram account. They shop online because it was easier, cheaper, the goods were more varied and sometimes, the goods that sold were hard to find in the conventional market. They rarely become regular customers and some of them were getting into the addictive stage of online shopping. Purchase decision of online shopping among Indonesian students obtained results that the attitude of others such as family, relatives or friends sometimes supports and criticizes because online shopping was considered wasteful, consumptive, and the high risk of fraud. Search and share has become the power in the purchasing decision process. Research results can be considered as business development with students as the target, a very promising market potential.

Keywords
Shopping Behavior, Online Shopping, Purchase Decision, Digital Marketing Communication

Topic
Communication Science

Link: https://ifory.id/abstract/TwvGUFqcxH8r

Corresponding Author
Binar Surya

Institutions
1 State polytechnic of Malang, Jl. Soekarno Hatta No.9, Jatimulyo, Kec. Lowokwaru, Malang City, East Java 65141

Abstract
This research is about optimizing the dry-system geothermal power plant. To optimizing the performance of a Geothermal Power Plant (PLTP) can be done in various ways, one method which can be use is add an Organic Rankine Cycle (ORC). The ORC would be install on the PLTP turbine output. Use the heat of the steam that come out after expansion process in the turbine to evaporated the working fluid (WF) on the ORC evaporator. The ORC is consisting of 4 main systems or components, Evaporator system, Turbine system, Condenser and Pumping system and the Reservoir Tank as additional equipment. Choose R290 as working fluid (WF) among four other candidates such as R134a, R600, R600a, and R152a. The ORC system optimization is focused on the number of WF masses that can generated on the ORC evaporator system. The ORC analysis results in a total energy of 11589 kW with thermal efficiency of 17%. Energy produced by ORC can increase PLTP energy production by 9%.

Keywords
Geothermal, Power Plant, Organic Rankine Cycle, Energy Conversion

Topic
Renewable Energy

Link: https://ifory.id/abstract/cZJPCWhqjGbD

Corresponding Author
Devy Mawarnie Puspitasari

Institutions
a)Student of Doctoral Program, Department of Economy and Business, Padjadjaran University Bandung- Indonesia / Lecturer of Faculty of Business and Management, Widyatama University
*devy.mawarnie[at]widyatama.ac.id
b) Lecturer of Department of Economy and Business, Padjadjaran University Bandung-Indonesia

Abstract
This study is to investigate the determinants of rural banks performance in West Java. The method used in this study uses panel data analysis. The data used are secondary data obtained from Bank publication reports during period 2012 until 2016. The population used in this study is rural banks in west java and sample selection based on purposive sampling. The results showed that capital, credit risk, operation efficiency and liquidity risk have significant influence to financial performance, simultaneously. Meanwhile, credit risk and operation efficiency have negative significant influence to financial performance, partially. Credit distribution strategy is needed for sustainability banks and increasing efficiency needs to be continuously considered by management to improve bank performance. This research will be useful in mapping the determinants of rural banks performance in West Java for economic growth, focusing on credit risk, liquidity risk, operation efficiency and capital.

Keywords
risk; financial performance; rural banks

Topic
Impact, Risk and Life Cycle Assessment

Link: https://ifory.id/abstract/X9nLvCPZaBNm

Corresponding Author
Zulkarnain Zulkarnain

Institutions
a) Magister Program of Science Education, University of Mataram. Jalan Majapahit No. 62, Lombok, 83125, Indonesia
*zulkarnainarasy[at]gmail.com
b) Chemistry Education Study Program, University of Mataram. Jalan Majapahit No. 62, Lombok, 83125, Indonesia

Abstract
The purpose of this study was to determine the improvement of students critical thinking skills. The subjects in this study were 101 students of class XI at SMAN 8 Mataram. This type of research is a quasi-experimental. A test consisting of 5 problems is used to collect experimental data. Five indicators of critical thinking are studied: interpretation, analysis, evaluation, inference, and explanation. The results showed that the PDC (Preparing Doing Concluding) model was able to improve students critical thinking skills on each indicator of critical thinking skills.

Keywords
Learning Model, PDC, Critical Thinking

Topic
Science Education

Link: https://ifory.id/abstract/49jPuXbweC32

Corresponding Author
Dindin Nasrudin

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
This study aims to analyze creativities and characters of students through project-based learning in designing experiments. Through the quasi-experimental method this research was conducted on 20 students who took experimental design courses. Through worksheets, product assessment sheets and attitude observation sheets the creativities and characters of students can be analyzed. The results showed that students- creativities in making experimental designs in the form of flowcharts had an average of 78.45 with good category, the abilities to create storyboards had an average of 75.81 with good category, the abilities to present products had an average of 77.65 with good category, the abilities to develop products from designing experiments had an average of 78 with good category. Meanwhile the characters developed were discipline with observable behavior that always came to the class punctually, spoke honestly, and remained confident even though the task that was doing was not satisfactory, the characters of responsibility with observable behavior was able to do the task without the help of others and diligently working on the task until it was finished.

Keywords
Character education, Creativity, PBL

Topic
Chemistry Education

Link: https://ifory.id/abstract/N96bJMHYugeZ

Corresponding Author
irna suryani

Institutions
Departemen Pendidikan Matematika, UPI

Abstract
USE OF SMARTPHONE, DISCIPLINE, MOTIVATION AND LEARNING ACHIEVEMENTS (Case Study of Sukabumi Al Azhar 7 Islamic Middle School Students 2018/2019 Academic Year) I Suryani 1*, S Prabawanto1 1Departeman Pendidikan Matematika, Universitas Pendidikan Indonesia Setiabudi No.229, bandung 40154, Indonesia *irnasuryani@upi.edu ABSTRACT This study aims to explain the effect of smartphone use on student mathematics learning achievements. The method used in this study is the collection of correlation data using questionnaires and interviews. The subjects of the study were 158 students at the Al Azhar 7 Islamic Middle School in Sukabumi. This research is based on the use of smartphones among students, whose intensity is increasingly increasing, has even become a trend. Uncontrolled use of smartphones results in discipline, motivation and learning achievement being interrupted. The first process is to look for the influence of intensity of smartphone usage on students learning discipline, on motivation and on student achievement. The research instrument consisted of 20 items using smartphone intensity and 20 items of discipline, 20 items of motivation and data on report cards. The data analysis method used is the Product Moment technique from Pearson using SPSS assistance and displayed in table form. Based on the data analysis (assumptions) that have been done, the results of the research from Pearson Corelation show that r = - 0.391 with P = 0.000 (P <0.05). This means there is a relationship (-) between the intensity of smartphone use with discipline, motivation and learning achievement of students. This means that the higher the intensity of smartphone use, the lower the discipline, motivation and learning achievement of students, and vice versa. The intensity of smartphone use gives a large percentage of students discipline, motivation and learning achievement, while the rest is determined by other variables not examined. The results of this studys data analysis that the relationship between the intensity of smartphone use and discipline, motivation and learning achievement of students is inversely or inversely. So that the hypothesis in this study can be said that there is a negative relationship between the intensity of smartphone use with student learning discipline can be accepted.

Keywords
smartphone, discipline, motivation, prestasi

Topic
Mathematics Education

Link: https://ifory.id/abstract/ZqWHU3h7tmGY

Corresponding Author
Saprudin Saprudin

Institutions
Universitas Pendidikan Indonesia

Abstract
This research is a survey that aims to explore the reinforcement of optics content in the curriculum of physics education study programs (PESP) in Indonesia. This survey is carried out through three stages as follows; a) first stage: focusing on investigations related to the distribution of waves and optics courses in 22 PESP- curriculum structures, b) second stage; involving 6 PESP which is considered to represent the PESP in the first stage, that focusing on analyzing college courses that contains the reinforcement of optics content, c) third stage; involving 2 PESP which is considered to represent the PESP in the second stage, that focusing on investigations related to lecture orientations and how the reinforcement of optics content is carried out. The results of the descriptive analysis show that the distribution of waves and optics course in the curriculum structure is presented in various ways, both from the course placement and the load of the course. The reinforcement of optics contents is also implemented in various approaches and methods.

Keywords
Optics, Curriculum, Physics education study program

Topic
Physics Education

Link: https://ifory.id/abstract/FvrZkNVTYtAf

Corresponding Author
Intan Sahmadesti

Institutions
a) Magister Program of Science Education, Universitas Mataram, Jl. Majapahit No. 62, Lombok 83125, Indonesia
*sahmadestiintan[at]gmail.com, rizal[at]unram.ac.id
b) Chemistry Education Study Program, Universitas Mataram, Jl. Majapahit No. 62, Lombok 83125, Indonesia

Abstract
Argumentation skills are an important practice in science in the 21st century to develop analytic skills and engage in arguments that can construct scientific explanations, develop critical thinking skills and evaluate alternatives. Science learning with guided inquiry model is able to facilitate students in learning to argue. However, good learning must be supported by good teaching materials. So the purpose of this study is to develop junior high school science teaching materials to improve students ability to argue. This study uses the Research and Development (R & D) method which was adapted from Borg & Gall. The parameters used to determine the quality of teaching materials developed are validity and practicality. The validity and practicality of the teaching materials developed were analyzed using Aikens V. The results of the feasibility test based on the results of expert validation were obtained by Aikens V of 0.75 with valid criteria, while the practicality test results based on teacher and student responses obtained Aikens V scores in a row 0.84 (very practical) and 0.80 (practical). Based on this, it can be concluded that the teaching materials developed meet the criteria for developing quality products that are valid and practical.

Keywords
Science learning materials, Guided inquiry model, Learning motivation, Argumentation skill

Topic
Science Education

Link: https://ifory.id/abstract/2tMfWk9hDFUc

Corresponding Author
Sri Hartini

Institutions
1 Departement of Natural Science Education, Postgarduate School, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budi N0. 229, Bandung 40145, Indonesia
2 Departement of Physics Education, FKIP, Universitas Lambung Mangkurat, Jl. Brigjen H. Hasan Baseri Kayu Tangi, Banjarmasin 70123, Indonesia

Abstract
Introductory Nuclear Physics course is found in the curriculum of pre-service physics teachers in the Institute of Teachers Training at South Borneo. This research is carried out which aims to describe the implementation of the course and the perceptions and knowledge of nuclear physics for pre-service physics teachers. This research used a descriptive quantitative method. The research sample used purposive sampling which consist of 42 students on eighth semester and one lecturer of the course. Data was collected through documentation techniques, questionnaires, interviews and observations. The results of the investigation showed: (1) the course process was not interesting enough by the dominant lecture method of the course and teaching materials written by lecturers without using the latest research results; (2) pre-service physics teachers tend to have negative perceptions and their knowledge were only limited to the knowledge contained in teaching materials written by the lecturer. Therefore, improvements are needed in the course process to answer the challenges of negative nuclear effects through the Education for Sustainability Development (ESD) approach and utilize the latest research results.

Keywords
introductory nuclear physics, pre-service physics teacher

Topic
Physics Education

Link: https://ifory.id/abstract/uBYe78xvKTPF

Corresponding Author
Laila Rahmi

Institutions
a) Prodi Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia
*lailarahmi[at]upi.edu
b) Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setia Budhi No. 229, Bandung 40154, Indonesia

Abstract
Problem solving ability is one of mathematics learning goals. Students problem solving abilities are good if they meet the indicator, able to solve closed mathematical problems in a mathematical context; able solve closed mathematical problems outside the mathematical context; solve open mathematical problems in a mathematical context; and solve open mathematical problems outside the mathematical context. But it was found that students problem solving abilities were still not good. This can be influenced by several factors including cognitive style and gender. The cognitive style in this study focuses on the Field Dependent (FD) and Field Independent (FI). This study conducted to analyze the influence of cognitive style and gender on students mathematical problem solving abilities. This research method was descriptive qualitative research. The subjects were six junior high school students. Students were given cognitive style tests and then problem solving abilities test. The results of tests and interviews was found that the mathematical problem solving abilities of male students with FD cognitive style were better than the mathematical problem solving abilities of male FI students. While the mathematical problem solving abilities of female students with the FI cognitive style were better than the mathematical problem solving abilities of female FD students.

Keywords
Problem Solving, Cognitive Style

Topic
Mathematics Education

Link: https://ifory.id/abstract/MHrzT7DYZfLK

Corresponding Author
Wiwik Dwi Rahayu

Institutions
a) Mahasiswa Pascasarjana Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi no. 229, Bandung 40154, Indonesia
b) Dosen Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Abstract. Science literacy is one in HOTS (High Order Thinking Skills). Science literacy is one of the skills needed by students so that students have the ability to solve HOTS problems. One way to measure scientific literacy skills is to use scientific literacy instruments. Several studies have been carried out in the development of scientific literacy instruments, but there are still shortcomings in their development. Some researchers also provide advice on the development of subsequent scientific literacy instruments. There are several shortcomings in existing scientific literacy instruments, including those that have not raised aspects of inquiry, critical insight. In addition, the existing forms of scientific literacy instruments still need development. Then the item analysis method used still uses the classical data analysis method, but some have used analysis items using IRT (Item Response Theory). These shortcomings can be minimized by changing the form of scientific literacy instruments to be more interesting or can measure more than one ability. In addition, the item analysis method of using IRT is one of the recommended methods of data analysis compared to classical analysis methods.

Keywords
Scientifict Literacy Instruments

Topic
Physics Education

Link: https://ifory.id/abstract/v4MwEHjVbqDX

Corresponding Author
Adi Rahman

Institutions
1,2,3,4,5,6 Computer Science, Faculty of Math and Science, State University of Jakarta
Rawamangun Muka Street No 1, Jakarta 13220

Abstract
Jakarta is the capital city of Indonesia which is famous for its nickname of a densely populated metropolitan city. The city of Jakarta is a place of central government where all government conditions in Indonesia are regulated in this city. In addition to being a center of government, Jakarta has many recreational places such as Taman Impian Jaya Ancol, Dunia Fantasi (Dufan), Monumen Nasional (Monas), Kota Tua, and many more. Jakarta has enormous tourism potential. To optimize tourism potential in Jakarta, a facility is needed in the form of a map containing tourist attractions in Jakarta along with routes to these tourist attractions. This map can help both domestic and foreign tourists visiting tourist attractions in Jakarta. The map must also show the optimal route to visit various tourist attractions. This is so that one can visit many places at one time. As a solution to this problem, the graph approach is used with the euler graph application as a solution to the optimal route problem. The algorithm used is the fleury algorithm. From the discussion, the results obtained that the use of graph euler with the algorithm Fleury can determine the optimal route in tracing tourist attractions in Jakarta.

Keywords
Graph, Jakarta, Wisata

Topic
STEM Education

Link: https://ifory.id/abstract/PGFDpj8X3u9w

Corresponding Author
Adi Rahman

Institutions
1,3Computer Science, Faculty of Math and Science, State University of Jakarta
Rawamangun Muka Street No 1, Jakarta 13220
2 Tourism, Faculty of Social Science, State University of Jakarta
Rawamangun Muka Street No 1, Jakarta 13220

Abstract
Mathematics and culture are two things seen as something that is not connected to everyday life. Whereas in teaching mathematics in school (formal), the teacher should start by exploring the knowledge of informal mathematics that has been obtained by students from the lives of the people around their homes. Environment can be a source of mathematical problems in real life. One of the environments is culture. Mathematics in culture is known as ethnomatematics. Each region certainly has its own culture, including Jakarta. Jakarta which is the capital city of Indonesia has a culture of traditional houses known as Rumah kebaya. Rumah kebaya has a special characteristic, especially on the roof which consists of a triangle and a trapezoid. The purpose of this exploratory research with ethnographic approach is to explore and explore any mathematical concepts that exist in rumah kebaya which can be used as a learning resource for mathematics as well as an effort to develop ethnomatematics as the basis for mathematics learning. Learning mathematics using ethnomatematics objects can enrich the mathematical applications that are around students and can facilitate students to understand abstract mathematics by using concrete ethnomatematics objects.

Keywords
Ethnomatematics, Jakarta, Rumah Kebaya

Topic
STEM Education

Link: https://ifory.id/abstract/9xWNaz2MnfRt