Indonesia Conference Directory

Corresponding Author
Ginta Octizasari

Institutions
(a*) Yayasan Pondok Pesantren Makrifatul Ilmi, Jalan Gunung Ayu, Manna, Bengkulu Selatan; (b)Postgraduate Mathematics Education, University of Bengkulu WR.Supratman road, 38371A Bengkulu, Indonesia

(a*) linierginta[at]gmail.com; (b) salehhaji[at]unib.ac.id

Abstract
This study aims to determine the realistic mathematical approach based on the South Bengkulu society ethnomatematics in improving the character of hard work. This research is an experimental study with data collection techniques through questionnaires and observation sheets. The subjects in this study were the eighth grade students of South Bengkulu State Second Middle School and South Bengkulu MTs Makrifatul Ilmi. The results of this study are (1) There is the influence of a realistic mathematical approach based on the South Bengkulu community ethnomatematics on the character of students hard work. The results of the Ancova test show that the p-value of each class is less than where each is 0,000 and 0,012. (2) Achieving the character of students hard work with a realistic mathematical approach based on the ethnomatatics of South Bengkulu society better than Conventional Learning.

Keywords
Realistic Mathematic Education, RME, Ethnomatematics, Character, and Hard Work

Topic
Mathematics Education

Link: https://ifory.id/abstract/m4D9zhHeLwXZ

Corresponding Author
Ramdhan Fazrianto Suwarman

Institutions
Suryakancana University
ramdhan[at]unsur.ac.id

Abstract
Real options are one of the most fascinating research topics in Finance today, since 1977 Stewart C. Myers from the MIT Sloan School of Management published his pioneering article on this subject in the Journal of Financial Economics. Real options are techniques for support capital budgeting decisions which adapting the techniques developed for financial security options. The purpose of using this real option is to capture options contained in projects that cannot be captured by discounted cash flow models that operate as a basic framework for almost all financial analyzes. The real option valuation process will be complemented by interest rate stochastic modeling and volatility stochastic modeling to further capture flexibility and volatility from the existing economic and financial situation. The valuation will be using Monte Carlo simulation with Matlab programming language on crude oil data from the North Sea oil field. The data is obtained from Charlie Grafström and Leo Lundquists thesis with the title "Real Options Valuation vs. DCF Evaluation - An application to a North Sea oilfield ".

Keywords
Real Options, Stochastic Interest Rate, Stochastic Volatility, Monte Carlo Simulations

Topic
Applied Mathematics

Link: https://ifory.id/abstract/HexbMh4qjXwT

Corresponding Author
Siti Nuraini

Institutions
Airlangga University

Abstract
Decreasing poverty line and improving the quality of human development is one of the objectives of development in Indonesia. Poverty has an impact multisectoral, not only concerning about household income but also the ability of households improve the quality of his life, that could be improve regional income. Poverty can causes disparities income in aech regencies or cities. The purpose of this research is look for the relations of poverty toward regional income, disparities, and human qualities. These research used quantitative descriptive method by rekursif generalized component structured analysis (GSCA) with research areas in East Java. In GSCA, variable latent defined as a component of weight or aggregate of the indicators. This results of this research seen the model FIT of 76% and a component root mean square of 0.08% indicates that the overall model could be used and well received. Poverty has a negatively influence to inequity, regional income, and quality of human beings. Variable disparities have a negative influence on regional income but a positive effect to the quality of human beings. Regional income variable has a negative influence on quality of human beings. But, not all variable having influence a significant impact on poverty. Variable disparities significant impact on poverty, variable disparities significant on the quality of human development and regional income.

Keywords
poverty, disparities, human development, GSCA

Topic
Sustainable Development

Link: https://ifory.id/abstract/mtfyxJ9z2Vpd

Corresponding Author
Rani Sugiarni

Institutions
suryakancana university

Abstract
The role of technology has become an important challenge in this century that has spread to the world of education. Therefore teaching materials are needed that help students in growing a culture of literacy in utilizing e-learning. This research aims to examine the validity of the project project-based e-learnig student worksheets in the material of the Class XI Vocational Geometry developed by utilizing waste. This type of research refers to the Four-D (4-D) driving model. The validity of student worksheets in terms of 4 experts consisting of material experts, education experts, linguists and school mathematics teachers is vocational. The results of the study are seen from the aspects of material, language and media showing that the student worksheet is good and feasible to use and valid. This is indicated by the results of evaluating the use of student worksheets in the class with generally positive student attitudes and student worksheets showing the category of leadership and one of which can foster a culture of literacy.

Keywords
literacy, project project-based, e-learnig, student worksheets, Geometry

Topic
Mathematics Education

Link: https://ifory.id/abstract/M9BpRqTHJDwt

Corresponding Author
Ansar Abbas

Institutions
a,c,d). Faculty of Economics and Business, Jalan
Air Langga no 4-6, 60115 Surabaya Jawa Timur, Indonesia

b). Department of Sociology, Faculty of Social And Political Science, Universitas Airlangga, Indonesia.

Abstract
Leadership is phenomena discussed in literature continuously to understand motivations and manifests that impact organizational development. The link of organizational development to environmental management has been negated[1], which is important to make the internal environment progressive and gain competitive advantage for sustainable development in organizational behavior studies. For improvements for positive benefits for now and future, there is a need to develop deep learning about sustainable educational leadership,[2]. Therefore, leadership and its effects in organizational settings remained the topic of scholarly discussions for decades. Not only adequate workload, but there are also some personal attributes influencing organizational commitment and a life of the person to increase or decrease commitment. The current study discussed the servant leadership and its multi-dimensional factors helping to increase commitment in employees. Through literature review, a casual model has been developed, results revealed that all components of servant leadership remain significant and increase organizational commitment to gain competitive advantage in development organizations

Keywords
Sustainable Development, Leadership, Commitment, gaining competitive advantage

Topic
Sustainable Development

Link: https://ifory.id/abstract/KAZqXpPd6JRc

Corresponding Author
Harry Dwi Putra

Institutions
Mathematics Education, Institut Keguruan dan Ilmu Pendidikan Siliwangi.
Jalan Terusan Jenderal Sudirman, Cimahi, 40526, Indonesia

Abstract
Mathematical reflective thinking skills and self-regulated learning are very important for high school students. It is necessary to study the association between mathematical reflective thinking skill and self-regulated learning. The study was conducted on 112 high school students in Cimahi. The research instruments consisted of a reflective thinking skill test and a self-regulated learning scale. The association uses the Pearson-Chi Square test and contingency tables. To find out the degree of association between critical thinking skills and self-regulated learning using the contingency coefficient (C) compared to Cmax. The results of the study indicate that Asymp. Sig. Pearson Chi-Square obtained is 0,00 smaller than the significant level of 0,05 so that it can be stated that there is an association between reflective thinking skills and self-regulated learning in high school students. The contingency coefficient (C) is 0,61 while the Cmax value is 0,83 so that the association degree (r) is 0,73 in the interval which is classified as high criteria. Students who have high mathematical reflective thinking skills will also have high self-regulated learning.

Keywords
Mathematical Reflektif Thinking Skills; Self-Regulated Learning; Senior High School Students; Association

Topic
Mathematics Education

Link: https://ifory.id/abstract/rxf3uVU8gw4e

Corresponding Author
Ansar Abbas

Institutions
a,c,d) Faculty of Economics and Business, Jalan Airlangga, Kampus B 60286 Surabaya Jawa Timur, Indonesia

b). Department of Sociology, Faculty of Social And Political Science, Universitas Airlangga, Indonesia.

Abstract
Relationship between sustainability and leadership role seems to be underestimated in educational development. The current study contributes to enhance the leadership understanding and effectiveness of Authentic leadership required in university management. Authentic leaders refer to genuine and real leaders based on high morality, transparency, balanced processing and self-awareness of a person. Authentic leader brings commitment and personal responsibility to perform well. Performance and commitment required for continuous development. Teachers and staff work together to achieve organizational goals, considering them as internal environmental and organizational forces to trigger their interests fostering commitment to bring competitive advantage. The current study hypothesized that ambitious authentic leaders embodied educational setting for better commitment which is required for sustainable development. Results of the study confirms that authentic leadership, and religiosity were significantly positively associated with organizational commitment.

Keywords
Authentic Leaderhsip, Sustainable Development, Commitment, Strategic Leadership

Topic
Sustainable Development

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

Corresponding Author
maghfira julietta

Institutions
Airlangga University

Abstract
This writing aims to explain how the role of Jatropha cultivation in a sustainable economy. The background of this writing is because the fuel that we use so far comes from fossil energy sources, fossil energy has a limited nature. With the increasing need for motorized vehicles every year, the increasing need for fossil fuels is needed. Of course, this can lead to a significant imbalance between the number of motorized vehicle users and the number of available energy reserves, besides that it can affect how the air quality in the country and the city. This writing uses using qualitative literature study methods. The author collects data with observation techniques. The results of this paper concluded that the Jatropha plant has a role in a sustainable economy. This is because fence distance has properties as renewable energy, jatropha also has several other economic benefits. As we know sustainable economies in the development of the use of natural resources today to meet the needs of not having to sacrifice the needs or rights of future generations. Also, Jatropha has several advantages when compared to oil palm.

Keywords
Fossil resources, sustainable economics, vegetable resources.

Topic
Renewable Energy Economics

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

Corresponding Author
Riski isminar Ardianti

Institutions
Airlangga University Airlangga Street No 4 Surabaya, Indonesia 60286

Abstract
The purpose of this study was to find out how the Muncar Sub district fishing community handled poverty throughout their lives. This research is a qualitative descriptive study using in-depth interviews conducted on 110 respondents from Fisher. The results of this study find out the main reason for being a fisherman because this work is derived from generation to generation, this is due to the low education of fishing families with a majority of income of 1-10 million per year. This amount is not a large number and makes this profession attractive to fight for, therefore the priority of primary needs is higher than secondary, awareness of the use of insurance is quite low, low post-harvest financial planning and difficult capital gains cause fishermen to obtain capital through debt and the majority of fishermen have loan. The loan source is very friendly and many are chosen by fishermen with a loan system to ship owners because it will make it easier for fishermen to make payments by deducting the honorarium as a crew

Keywords
Fisherman, Poverty, Income

Topic
Maritime Economics

Link: https://ifory.id/abstract/dwNtEAKuRj4z

Corresponding Author
Alfa Rahmiati

Institutions
Universitas Airlangga

Abstract
Abstract. There have been a lot of researches concerning the corporate social responsibility and tax aggressiveness in Indonesia. However, this study provides particular attention into the effects of environmental disclosure (corporate social responsibility) on tax aggressiveness on property and real estate sector companies. This study also provides a test using some control variables, such as company size (SIZE), and leverage (LEV) to robust the analysis. Based on 103 samples of Indonesian publicly listed property and real estate sector companies, the results indicate that corporate social responsibility firm significantly negative related to tax aggressiveness, while firm size and leverage surprisingly are not significantly related to tax aggressiveness.

Keywords
Keywords: corporate social responsibility, environmental disclosure, firm leverage, firm size, tax aggressiveness

Topic
Enviromental Accounting

Link: https://ifory.id/abstract/nNTA6huCJVeX

Corresponding Author
Iman Harymawan

Institutions
Universitas Airlangga

Abstract
This study examines the tone of language in sustainability report, focusing on the construction industrial sector of companies listed in Indonesian Stock Exchange year 2010 until 2018. This study analyzed 152 sustainability report using sentiment analysis method wrote in python code. This study shows that around 68%-79% of disclosures in sustainability reports show positive sentiment. These results indicate a high level of corporate accountability in the construction industry related to sustainability. This research contributes to stakeholders in making comprehensive decision related to companys accountability.

Keywords
sustainability report, sentiment analysis, construction sector

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/X2fdrHYvqEPF

Corresponding Author
Hamidah -

Institutions
Airlangga University

Abstract
Sustainability report is increasingly discussed in todays business world. The purpose of this paper is to obtain empirical evidence of (1) board size effect on firm value, (2) sustainability report effect on firm value, (3) board size effect on sustainability report, and (4) role of the sustainability report in mediating the effect of board size on firm value. This research uses quantitative methods, which take a sample of 103 companies that publish sustainability reports. The subjects in this study were all companies listed on the Indonesia Stock Exchange in the period 2013 to 2017. Based on the results of hypothesis testing obtained, board size and sustainability report are positively affected firms value, the effect of board size on sustainability report is not significant, and the sustainability report cannot mediate the board size relationship with firm value.

Keywords
Sustainability Report, Firm Value, GCG

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/3GjAMDRCrgVZ

Corresponding Author
Iman Harymawan

Institutions
Universitas Airlangga

Abstract
This study describes the trend and pattern of companys sustainability report in construction industry listed in Indonesian Stock Exchange year 2010 until 2018. Using text mining analysis, 152 companies sustainability report are analyzed using a software named "Phyton". This study found that the concern for sustainability issues is represented by the selection of problem disclosures through negative words, and the companys attention and efforts are represented by positive words. This study contributes help to the users of sustainability report (investors, governments, and communities) to understand companiess strategies and concerns related to economic, social and environmental issues.

Keywords
sustainability report, text mining, construction industry.

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/tbJZahg89vEu

Corresponding Author
Hamidah -

Institutions
Airlangga University

Abstract
This study aims to examine the relationship of the three characteristics of the board of directors (board size, board independence, and CEO duality) as part of good corporate governance and its effects on the level of sustainability report disclosure with moderating effect of audit committee. This study underpins Signalling Theory to analyze and explain the role of corporate governance and their association with the level of sustainability report disclosure. In this study, 106 samples were taken from 35 companies listed at Bursa Efek Indonesia which disclose sustainability report using GRI G4 during 2013-2017 periods. Board size and board independence was found to have significant negative relationship with the level of sustainability report disclosure, but CEO duality. Furthermore, the findings show that the audit committee strengthen the moderating effect of the relationship between board size, CEO duality, and the level of sustainability report disclosure, but weaken the moderating effect of the relationship between board independence and the level of sustainability report disclosure.

Keywords
Sustainability Report, GCG, GRI G4, Signalling Theory

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/L9XtAfqFWEDz

Corresponding Author
Hamidah -

Institutions
Airlangga University

Abstract
Sustainability Reporting Award program is an annual event to appreciate the achievement of a company in carrying out environmental and social activities and preparing the sustainability report in accordance with agreed standards which are GRI-s Sustainability Reporting Standards or G4. The objectives of conducting Sustainability Reporting Award program are to enhance corporate responsibility towards social and environmental aspects that may be impacted by the operational business, foster public trust especially from the key stakeholders, and bring awareness for a company to be accountable and transparent. This research aims to test whether Sustainability Reporting Award has an effect on company-s financial performance and firm value of nonfinancial public companies listed in Indonesia Stock Exchange. This study uses panel data of 2985 observations for the 8-year time period during 2010-2017. This research was conducted quantitatively with Ordinary Least Square (OLS) Regression using robust standard errors to test the hypothesis. The statistical result of the test shows that Sustainability Reporting Award has a positive and significant impact on both financial performance represented by ROA and firm value represented by Tobin-s Q.

Keywords
Sustainability Reporting Award, financial performance, firm value

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/TXGYQVhZ3Cqd

Corresponding Author
Hanif Fadhlillah

Institutions
Department of Sharia Economic, Faculty of Economic and Business, Universitas Airlangga, Surabaya, Indonesia
Master of Islamic Economic, Faculty of Economic and Business, Universitas Airlangga, Surabaya, Indonesia

Abstract
Islam Damage to natural resources that have occurred so far is a negative impact of unplanned economic development activities so that the concept of sustainable development becomes a concept offered to provide solutions to the problem. In addition, the goal of sustainable development is to bring prosperity to all elements of society. The management of natural resources is also explained in the Islamic perspective originating from the teachings of Islam, namely the Quran. Islamic economics sees sustainable economic development as a multidimensional thing. In addition, Islam also explained that maqashid syariah is a way to achieve welfare goals or what is referred to as the Falah concept.

Keywords
Natural resources, sustainable development, Islamic economics

Topic
Energy Economics

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

Corresponding Author
Miguel Angel Esquivias Padilla

Institutions
This paper analyses determinants of agricultural exports and imports from Indonesia, including demand and supply factors capturing effects of income, market size, prices, and variables related to logistics, competitiveness, trade policy, and innovation. Trade creation and diversion effects are estimated as Indonesia experienced a deep liberalization of markets. A gravity model is employed to analyze agricultural exports disaggregated into raw goods and food. The dataset comprises 50 countries from 2007 until 2017. The results find trade creation effects for both categories, with larger effects in exports within agricultural raw goods, and higher trade creation through imports in food. Indonesia also experience trade expansion with non-free trade partners suggesting that demand variables (e.g. income, market size, sophistication) is a more important driver of growth rather than agreements. Price factors affect agricultural goods, with food products experience elastic price demand, while raw goods being affected by prices and exchange rate. Gains in competitiveness, logistic performance, and innovation is supporting agricultural exports (imports as well). The implementation of the FTAs should be critically evaluated with respect to food products as imports have expanded more rapidly than exports and domestic goods may have experience pressure from liberalization.

Abstract
This paper analyses determinants of agricultural exports and imports from Indonesia, including demand and supply factors capturing effects of income, market size, prices, and variables related to logistics, competitiveness, trade policy, and innovation. Trade creation and diversion effects are estimated as Indonesia experienced a deep liberalization of markets. A gravity model is employed to analyze agricultural exports disaggregated into raw goods and food. The dataset comprises 50 countries from 2007 until 2017. The results find trade creation effects for both categories, with larger effects in exports within agricultural raw goods, and higher trade creation through imports in food. Indonesia also experience trade expansion with non-free trade partners suggesting that demand variables (e.g. income, market size, sophistication) is a more important driver of growth rather than agreements. Price factors affect agricultural goods, with food products experience elastic price demand, while raw goods being affected by prices and exchange rate. Gains in competitiveness, logistic performance, and innovation is supporting agricultural exports (imports as well). The implementation of the FTAs should be critically evaluated with respect to food products as imports have expanded more rapidly than exports and domestic goods may have experience pressure from liberalization.

Keywords
Agricultural Trade; Gravity Model, Trade creation and trade diversion effects, GMM

Topic
Sustainable Development

Link: https://ifory.id/abstract/eLXBTU8cADJu

Corresponding Author
Rahmawati -

Institutions
a) Program Studi Pendidikan Fisika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Muhammadiyah Makassar, Jl. Sultan Alauddin No. 259, Makassar 90222, Indonesia
b) Program Studi Pendidikan IPA, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
One of the ways that can be used to validate test items is by Rasch Model application. Validation aspects used in this research consist five aspects, such as (1) item measure, (2) item fit, (3) differential items, (4) person measure, and (5) person fit. The test was given in the form of multiple choice as many as 40 items consisting of 23 items about electricity and 17 items about magnetism. The participants were 60 physics students who were given 60 minutes to do the test. Items was analyzed using WINSTEPS version 3.68.2. The results showed that the test items are valid. Reliability alpha of items is 0.90. It means that the quality of test items is very good.

Keywords
Validation, Rasch Model, Electricity and Magnetism Achievement Test

Topic
Physics Education

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

Corresponding Author
Ida Wijayanti

Institutions
Magister of Islamic Economic Science, Economic and Business Faculty, Universitas Airlangga
*ida.wijayanti-2018[at]pasca.unair.ac.id

Abstract
The purpose of this research is to provide an idea about source of investment fund in Indonesia-s renewable energy through Islamic crowdfunding mechanism. The method used is qualitative explanatory analysis with a literature study strategy. Seeing the challenges and opportunities of renewable industry investment, Islamic crowdfunding is said to be solution of renewable energy development in Indonesia. This research produced some Islamic crowdfunding mechanism to fulfil renewable energy investment in Indonesia. The Islamic crowdfunding mechanisms are included a donation based (hibah and qardh), equity and loan based (syirkah: mudharabah and musyarakah), also debt based (murabahah and ijarah). This donation, equity, loan, and debt based crowdfunding are form of proposed solution to answer the challenge of renewable energy investment in Indonesia

Keywords
Islamic Crowdfunding Mechanism, Renewable Energy, Investment

Topic
Renewable Energy Economics

Link: https://ifory.id/abstract/JMaqpKjtn3uQ

Corresponding Author
Aufan Asidqi

Institutions
Universitas Airlangga

Abstract
One of the unsolved problems in Indonesia until this era is waste problems. Indonesia produces 187.2 million tons of plastic waste. The community is still lacking in the awareness about this problem. This research aims to discover how aware are the college students in using tumblr water bottle as an effort to reduce the use of plastic bottle. Method used in this research is quantitative approach with data collection method using questionnaire which include 8 questions. The sample used in this research is 50 students of Faculty of Science and Technology which consist of 8 different majors and 4 different year classes. 70% of the respondents are students from Environental Engeneering major, with also 70% respondents are students from class of 2017. From the survey data, 58% students bring tumblr water bottle to the campus, but they are still buying drinks in a plastic packaging for the bottle refill. Only 18% students that chose not to buy drink in plastic bottle. Average of the students buy approximately 1-2 drink in plastic packaging per day even though they already bring tumblr water bottle. 96% students already know the effects of plastic waste and 90% students already have the willing to reduce plastic bottle waste.

Keywords
Plastic waste, Student awareness, Tumblr water bottle

Topic
Environmental Awareness and Education

Link: https://ifory.id/abstract/kU6y2rntDPT3

Corresponding Author
Cindy Nur Hidayah

Institutions
Universitas Airlangga

Abstract
Indonesia has a total potential of geothermal resources around 25386.5 MWe and in 2018 became the state number 2 at the level of geothermal production in the world after the United States, namely 1948.5 megawaatt (MW). Indonesia has a great potential on geothermal energy as renewable energy resources. Geothermal energy into alternative energy because energy is pollution-free clean energy than coal which has an output of carbon pollution and greenhouse gases. Indonesias potential for the high production of geothermal energy can be a treasure trove for energy security of the country and replace coal as nonrenewable fossil fuel energy resources. Geothermal selected as an alternative energy power plants by considering economic, environmental, social, and regulatory. Development PLPT have enough challenges require careful attention and analysis because of their resistance to fight the countrys energy and environment must be kept in balance. The government is preparing several solutions with renewable energy programs and policies that exist as a barrier and surveillance.

Keywords
geothermal energy, alternative energy, environmental economics.

Topic
Renewable Energy

Link: https://ifory.id/abstract/QVYuwzf8LBGb

Corresponding Author
Disya Berliani Salsabila

Institutions
Faculty of Science and Technology, Airlangga University, Jalan Mulyorejo,Surabaya 60115, Indonesia * fsaintek[at]unair.ac.id

Abstract
Abstract. The environment is one aspect of life that must be preserved. Environmental management in this era tends to be oriented to the economy, humans often carry out exploratory actions to fulfill their interests. Improper management of the environment can cause long-term damage that can harm humans in all aspects of life. Humans are the main element of the environment, which can greatly influence the continuity of environmental quality. The young generation, especially students, plays an important role in environmental sustainability. Students in the process of studying at the university bear great responsibility as a successor to later civilization. Students should be aware of their obligations, rights, and authority over the environment in order to be able to exploit the potential of the environment without destroying it, for the sake of the survival of humanity.

Keywords
Environmental,Environmentalscience, Sustainability

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/8yBUD2VPYztJ

Corresponding Author
Dhany Damayanti

Institutions
1S1 Environmental Engineering Student, Faculty of Science and Technology, Airlangga University, Surabaya, Indonesia
2Advisor, teaching staff of the Faculty of Economics and Business, Airlangga University, Surabaya, Indonesia

Abstract
Abstract. This research aims to estimate the emission of CH4 gas from the utilization of biogas technology as a source of alternative fuels and biogas has an influence on the economic condition of the society of Ploso Ngamban Village, Kendal, Ngawi East Java who has been utilizing biogas. Ploso Ngamban Village, Kendal, Ngawi East Java is one of the villages with the most populations as cattle ranchers and has been utilizing cow dung as a biogas. In cow dung, there is a CH4 gas that contributes 3% of the total greenhouse gas emissions. There are 32 cows that have been utilized to 18 units of biogas, if used maximally, it is able to reduce the emission of CH4 gas by 1,952 kg or it helps to reduce the CO2e gas emissions by 48,800 kg/year of emissions for the district of Kendal, Ngawi East Java. So if the use of cow dung into biogas is done to the fullest, it will get the efficiency of lowering the cost of CO2e gas emissions processing in Ploso Ngamban Village, Kendal, Ngawi East Java by Rp 23.424.000/year. Calculation method is based on the calculation of greenhouse gas emissions, using the formula quoted from the Ministry of Environment of the Republic of Indonesia, namely GHG emissions = Ai x EFi.

Keywords
biogas, CH4 gas, greenhouse gas

Topic
Renewable Energy Economics

Link: https://ifory.id/abstract/Z3MNcTG26jew

Corresponding Author
VINDI ELSA FATIKASARI

Institutions
1Undergraduate Students of Environmental Engineering, Faculty of Science and Technology, Universitas Airlangga, 60115, Indonesia
2Supervising Lecturer, Teaching Staff of Faculty of Economics and Business, Universitas Airlangga

Abstract
Air pollution can be defined as the infiltration of substance, energy, or other components into the ambient air due to human activities to the point that the quality of the air is descending into a certain a level, causing ambient air-s inability to fulfill its function which can affect human-s health. This study is conducted in Surabaya to review the impact of air particulate concentration toward people-s health and economic condition from October, 2012 through February, 2014. Air pollution indicator used is particulate matter 10 (PM10) and PM2.5. Methods done for this study is literature study, descriptive research, sampling collection, and calculation of economic impact. This study is conducted to find out the effect of air pollution, particularly concentration of PM10 and PM2.5, towards health and economic condition of residents in Surabaya. The economic impact is measure by the amount of money spent due to health problems which includes mortality and morbidity. The technique used in this research involves two approaches which are epidemiology to assess the causality of PM10 and PM2.5 concentration level against health risks that occur, and economic valuation to estimate value in monetary unit against those healthy risks. The result of this study indicates that the quality of air in Surabaya contains PM2.5 concentration which has exceeds its annual standard value according to Government Regulation No. 41 in 1999, which is 15.05 μg/m3 and 30.41 μg/m3 of PM10 concentration. Air pollution caused by PM10 and PM2.5 impacts residents of Surabaya in terms of the quality of health which is proven by the emergence of health cases suffered by residents of Surabaya. This impacts the economic sector in which every resident needs to endure health costs of 4.1% from their income as the negative effect (externality) of economic development.

Keywords
Air pollution,Concentration,PM2.5,PM10,Particulate air.

Topic
Environmental Pollution and Health

Link: https://ifory.id/abstract/ZWAh926CtXjL

Corresponding Author
Hadiah Fitriyah

Institutions
1)Students of the Doctoral Program in Accounting Science, Faculty of Economics and Business - Airlangga University, Surabaya
2)Departement of Accounting, Faculty of Economics and Business, Muhammadiyah University of Sidoarjo
3) Departement of Accounting, Faculty of Economics and Business, Airlangga University, Surabaya

Abstract
The purpose of this study is to determine the role of innovation green as a manifestation of the implementation of sustainable environmental development in improving the performance of the batik creative industry. The batik creative industry is one of the creative industries in Indonesia that is a requirement with traditional values. Batik was recognized by UNESCO in 2009 as a world cultural heritage, so it greatly influences the level of demand for batik cloth. Increased production of batik cloth raises environmental pollution problems. Therefore the role of academics is needed to provide insight to batik creative industry players through this research. The approach of this research is to use a qualitative research approach. Data is collected by survey, in depth interviews, documentation, observation and Focus Group Discussion (FGD). and the data analysis uses triangulation analysis. The results of this study indicate that green product innovation is a business strategy that can be implemented in realizing sustainable environmental development and ultimately can improve the performance of batik creative industries.

Keywords
green product innovation, sustainable environmental development, creative industries

Topic
Enviromental Accounting

Link: https://ifory.id/abstract/McYC4dmDQ8Ek

Corresponding Author
Muslihudin Muslihudin

Institutions
1. Faculty of Social and Political Science, Jenderal Soedirman University, Purwokerto, Indonesia.
2. Research Centre of Expertise Agency, The House of Representatives, Republic of Indonesia, Jakarta, Indonesia.

Abstract
ABSTRACT Corruption in Indonesia is actually not a new phenomenon. Corruption has existed since the era of the old order, new order, even the colonial era. In the reformation era style democratic political system, corruption became apparent that open our eyes that it turns out, it has had a chronic illness. Theoretically, the political system can be linked with the phenomenon of corruption. Politics cannot be separated with power, corruption too. Therefore, how the system will affect the power management of the phenomenon of corruption. A democratic system can be a positive or negative effect on corruption cases. A number of corruption cases in Indonesia has been so massive. Various studies or surveys are always seats the corruption in Indonesia ranked high compared to other countries. Even now well recognized that corruption is considered a serious disease, it is an attempt to lead to corruption eradication increasingly considered important. The effort is characterized by the formation of a variety of laws and regulations, strengthening anti-corruption agencies and anti-corruption education, all of which is expected to eliminate or reduce this social disease. Prospects for a successful eradication of corruption depend on all components of the nation because without the participation of all is impossible corruption will disappear. Various fields and strategies must be done to sustain the program. Everything and even then, it should always be backed by a strong political and social will.

Keywords
corruption; democracy; education; political and social will.

Topic
Sociological Aspects of Strengthening SDGs Achievement

Link: https://ifory.id/abstract/zUFd4gPCfjQ7

Corresponding Author
Rifki Khoirudin

Institutions
a) Fakultas Ekonomi Dan Bisnis, Universitas Ahmad Dahlan
Jalan Kapas No.9, Yogyakarta 55166, Indonesia
*rifki.khoirudin[at]ep.uad.ac.id
b) Fakultas Ekonomi Dan Bisnis, Universitas Ahmad Dahlan
Jalan Kapas No.9, Yogyakarta 55166, Indonesia

Abstract
The property sector which experienced an increase can be seen from the number of construction, housing, apartments, hotels, houses, shops (shop houses), shopping centers, and office centers. This large amount of development indicates that there is a considerable market opportunity for the property sector in Indonesia. This information also has implications for investors positive reactions to stock prices in property sector companies on the Indonesia Stock Exchange (IDX). The average stock (stock) has increased due to positive sentiment from investors to the companys performance expectations of the property sector issuers to obtain company profits. The higher profit obtained by the company will result in an increase in the companys stock price so that the higher the stock return is obtained (Jafar, 2012). The formulation in this study is how the influence of financial ratios on stock prices of property sector companies. From the results of the study, the results of Current Ratio (CR) Variables, Total Asset Turnover (TATO) Variables, Debt To Asset Ratio (DAR) variables have a significant positive effect on stock prices. While the Variables of Return On Assets (ROA) and Variables Earning per Share (EPS) do not have a significant positive effect on stock prices.

Keywords
Stocks, Financial Ratios, Price.

Topic
Manajemen Keuangan

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

Corresponding Author
Moedji Raharto

Institutions
Institut Teknologi Bandung,
UIN Surabaya

Abstract
Sistem Bumi, Bulan dan Matahari menghasilkan berbagai fenomena langit berulang dan terus menerus dalam jangka waktu yang amat panjang dalam skala kehidupan manusia. Diantara fenomena langit yang berulang tersebut adalah fasa bulan, gerhana Bulan, gerhana Matahari, posisi terbit dan terbenam Matahari, fenomena sabit bulan di equinok, fenomena sabit bulan di solstice/di titik balik utara maupun selatan dsb. Sistem kalendar Bulan dibangun berdasarkan siklus sinodis Bulan, sistem kalendar Matahari dibangun berdasarkan sisklus tropis Matahari dan sistem kalendar Luni – Solar dibangun berdasarkan siklus sinodis Bulan dan sisklus tropis Matahari. Makalah ini akan memaparkan keterkaitan antara fenomena gerhana Bulan dan gerhana Matahari dalam sistem kalendar, keterkaitan karena keduanya karena keduanya merupakan penurunan dari fenomena langit yang dihasilkan oleh sistem Bumi, Bulan dan Matahari.

Keywords
Gerhana Bulan, Gerhana Matahari, Kalendar

Topic
Lain-lain

Link: https://ifory.id/abstract/QZ3mvyApLR9Y

Corresponding Author
sudirman sudirman

Institutions
Politeknik STTT Bandung

Abstract
Ketergantungan serat selulosa dalam industri tekstil sangat besar terutama untuk serat kapas, namun pada perkembangannya telah ditemukan serat serat baru sebagai alternatif dari serat kapas, sehingga serat baru tersebut perlu diuji agar dapat memenuhi daya pintal. salah satu persyaratan serat dapat dipintal adalah memiliki gesekan permukaan. pengujian gesekan permukaan dilakukan pada beberapa serat dengan menggesekan antara serat individu dengan menggunakan metode point of contact involving hanging of fiber. prototype alat yang digunakan menggunakan mikrokontroler sebagai pengendali alat dan untuk pergeseran hasil gesekan menggunakan sensor ultrasonik. Percobaan dilakukan dengan membandingan nilai koefisien gesek statis dari alat yang dibuat dengan metode sebelumnya, telah didapatkan bahwa nilai koefisien serat rayon 0,47, nilon 0,60, untuk serat batang dan daun didapatkan kecombrang 0,19, rami 0,14, kenaf 0,14, pandan bali 0,16, agave attenuate 0,16, dan bromelia giant 0,17. Nilai koefisien gesek statis dapat dijadikan acuan sebagai salah satu syarat serat dapa dipintal atau tidak.

Keywords
serat, prototype alat uji gesek, metode point of contact involving hanging of fiber

Topic
Instrumentasi

Link: https://ifory.id/abstract/cLNeFumP32MK

Corresponding Author
Hesty Eka Mayasari

Institutions
Center for Research and Standardization of Surabaya
Jl. Jagir Wonokromo No.360 Surabaya, 60244, Indonesia
Telp.: +62 31 99843670, Fax +62 31 8410480

Abstract
Chloroprene rubber (CR) is synthetic rubber widely used for seal, joint, and also adhesive. For making rubber good, additives are needed and it can influence the properties of vulcanizate. Phenolic resin is used as additives in this study. This study aims to determine the curing characteristics and mechanical properties of chloroprene vulcanizate. The chloroprene vulcanizates were done by two-roll mill by adding phenolic resin. The phenolic resins were varies i.e: 0, 10, 20, and 30 phr. The curing characteristics of the CR vulcanizates were studied by rheometer at 140 ºC, 150 ºC, and 160 ºC. The phenolic resin improves the mooney viscosity, scorch time and optimum curing time. The compound without phenolic resin gives the highest mooney viscosity and optimum curing time. The 10 phr phenolic resin give the best mooney viscosity, optimum curing time, constant rate, activation energy and also tear strength. The suitable curing temperature for CR compound is at 150 ºC and the 10 phr phenolic resin is the proper additive for CR vulcanizate.

Keywords
Phenolic resin, Tackifier, Chloroprene, Adhesive

Topic
Polymer

Link: https://ifory.id/abstract/3UAjDLKHmgMC