Indonesia Conference Directory

Corresponding Author
norman iskandar

Institutions
1st-4th : Department of Mechanical Engineering, University of Diponegoro
5th :Department of Mechanical Engineering, Semarang State University
6th :Department of Mechanical Engineering
University of Wahid Hasyim

Abstract
Austenite temperature must be achieved in the surface hardening process. In the process of surface hardening by the method of flame hardening, failure is often encountered, for example, such as increasing the value of hardness that is not optimal, and the value of hardness that is less uniform The type of fire used, the distance of fire to the specimen, the speed of fire and the level of thickness of the material are factors that are very influential in the process of flame hardening. The purpose of this study is to measure and observe the profile or rate of the trend of increase and decrease in temperature in the flame hardening process in low carbon steel material.The experiment method that is carried out is by giving the variation of the rate. The measurement process uses several thermocouples mounted on the specimen and connected to a computer for the process of data recording and process monitoring. The conclusion of this study is the greater the value of the thickness of low carbon steel material that is processed by flame hardening, so to reach the temperature of austenitization by the method of flame hardening the speed of fire must be slowed. An improper combination between the distance of fire and specimens and the speed of fire can cause austenite temperature not to be reached. The heat reduction rate takes place more slowly than the rate of increase in heat. the speed of fire and distance of fire to low carbon steel which has varying levels of thickness.

Keywords
Austenitization, flame hardening, low carbon steel, temperature, thickness

Topic
Functional Materials

Link: https://ifory.id/abstract/EjuB8UH4Lge7

Corresponding Author
Nova Wijayanti

Institutions
a) Universitas Indonesia
b) Universitas Indonesia

Abstract
Using Human Factor Analysis and Classification System (HFACS), this research aims to know how external environment, organizational influence, unsafe supervisor, and precondition of unsafe acts contribute to unsafe acts (human error) in aircraft maintenance, and the relationship between each factor using PLS-SEM to conduct exploratory research. Study case in Garuda Indonesia Aircraft Maintenance proved that precondition of unsafe acts is the most contributing factor for human error in maintenance. Therefor the company should address more attention in precondition of unsafe acts.

Keywords
Aircraft Maintenance; Human Factor; HFACS; unsafe acts; PLS-SEM

Topic
Human Resource Management

Link: https://ifory.id/abstract/7TctBmZ3nGRw

Corresponding Author
Faradhyba Rizky Ramadhana

Institutions
Department of Urban and Regional Planning, Faculty of Architecture Design and Planning, Sepuluh Nopember Institute of Technology

Abstract
According to 2010-2030 Kediri Regencys Spatial Plans, Ngasem urban area is the capital of Kediri Regency which is planned to be the main function as a centre for trading, services in the form of Central Business District, a centre of public services and industrial area. The longer development of built up areas in Ngasem urban area keep on increase, but local government revenue (PAD)of Kediri Regency does not accomodate the plans cost. PAD should be one of the main funding source of APBD. However, Kediri Regencys PAD is still relying the balancing funds from the central government. APBD whereas if the urban land use was managed optimally, it will provide maximum benefits. Therefore, research is needed to determine the optimal space allocation direction in Ngasem urban area in order to maximize Kediris PAD. The first step in this research is formulation an optimization model which is conducted using linear programming for getting the optimal area composition. Then determining the optimal space allocation using Cellular Automata. The result of research show that the optimal model of landusing optimization will provide the highest benefit in PAD when the industrial land has the largest composition area than the trading and public service area. As for the trading lands are directed toward in the city main road and main urban area. Public services and facilities are directed toward the settlement area and industrial area are recommended to direct toward the infrasructure networks.

Keywords
Allocation, Cellular Automata, Linear Programming, Optimization

Topic
Modeling, Simulation and Optimization

Link: https://ifory.id/abstract/HrGT8JuLDwAN

Corresponding Author
Masmira Kurniawati

Institutions
Faculty of Economics and Business – Universitas Airlangga – Indonesia

Abstract
One indicator of good quality of community life is when people have a good level of education. University is one of the institutions that carry this mission. With the enactment of ASEAN economic community and also global market, the demand to become a world class university is getting bigger. It is therefore important to discover the current performance of university to find out how it can make improvements in order to improve its performance. As one of the major university in Indonesia, Universitas Airlangga has made much effort to achieve that goal. This research aims to raise the issue of efforts and strategies of Universitas Airlangga in improving its performance for the achievement of international standard quality. This study identifies awareness about sustainability and students- perceptions of the Higher Education for Sustainable Development (HESD) dimensional. Respondents in this study are chosen by using purposive sampling method. The results of the study reveal that the Sustainable Environment Program is still considered weak in implementation while the dimension that is considered the best in its implementation is the Research and Development Program. Managerial implications and suggestions for future research then are delivered.

Keywords
Higher Education, Sustainable Development

Topic
Environmental Awareness and Education

Link: https://ifory.id/abstract/pXwuHxZaM6GU

Corresponding Author
Fahrul Riza

Institutions
Universitas Bunda Mulia

Abstract
Purpose: Good corporate governance improves the trust among stake holder and improve firms profitability, obtains financing and reduces costs of capital and eventually foster dynamic economic growth for the countries. However, not all firms are able to build and maintain this capabilities in the long run. There is an urgent need to find out how governance mechanisms can impact the sustainability of the firms competitive advantage Design/methodology/approach: This study undertakes a synthesis of classic and contemporary insights into governance and trust in Resource Based Theory literature to assist the development of several research propositions. Findings – By by classifying trust as calculative and relational trust on the relationship between governance as firm capability, this conceptual paper suggest that one of the strategic skills a leader needs to have is the ability to improve the trust among stake holder in order to sustain the competitive advantage of the firms. Research limitations/implications – Through the development of the research propositions the paper helps to clarify terminology and provide several suggestions for future research. The resulting model still needs to be empirically tested at the practical level Originality/value – The output and mechanism of good corporate governance are still vague among practitioners. This research narrows it by proposing trust as mediation to achieve sustainable competitive advantage

Keywords
Corporate Governance, Trust, Competitive Advantage, Leadership

Topic
Manajemen Strategi

Link: https://ifory.id/abstract/qrQdyvWV8cBt

Corresponding Author
Muchlisin ST, M.Sc.

Institutions
Universitas Muhammadiyah Yogyakarta

Abstract
Kentungan Intersection is an intersection that always having a traffic jam at the peak hours. Traffic congestion at Kentungan Intersection is caused by highly vehicle volume exceeding the intersection capacity. The type of this intersection is flat intersection. Thus, its need to evaluate from geometric view with the ways of changing the type of the intersection to elevated intersection (interchange). Elevated intersection is consisting of conventional and unconventional. Elevated conventional intersection is commonly used in Indonesia like flyover or underpass. This study chooses one of the unconventional intersections called Single-Point Urban Interchange (SPUI). SPUI provides vehicle movement more and efficiently than others type. The purpose of this study is to get modelling result from three intersections condition. Method used in this study is modelling using program PTV.VISSIM 9. This study models a three condition; existing condition, Default SPUI Intersection, and Modification SPUI Intersection. Result of the modelling existing condition, level of service of the intersection is LOS F with the average vehicle delay is 104,79 second. On Default SPUI Intersection, level of service of the intersection is LOS D with the average vehicle delay is 32,54 second. On Modification SPUI Intersection, level of service of the intersection is LOS D with the average vehicle delay is 30,3 second. Result of this models are passing the calibration process from driving behavior aspect and vehicle volume validation and the best result is SPUI with size modification.

Keywords
Intersection, SPUI, Unconventional, VISSIM

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/DXc6b2g3pLFB

Corresponding Author
Muchlisin ST, M.Sc.

Institutions
Civil Engineering Study Program, Faculty of Engineering, Indonesia

Abstract
In a construction project development is almost always sure to always have problems that can cause delay and waste time. Both of the planning process, procurement even until the installation process will be faced with various technical and nontechnical problems that must be able to be minimized as well as possible by all sides of the construction project. Workers in construction projects such as Main contractors and SUB contractors are workers who often face problems directly in the construction project. Similarly, the Turbine Hall construction project at PLTU Tambak Lorok Block 3 Semarang was found in the project a few obstacles which became a factor of delay and waste time. This research was conducted to determine the factors of the cause of delays and waste time according to some elements of the workers main contractors and subcontractors working on the project by the dissemination of the questionnaire. The results obtained from all two elements of the worker are then analyzed using the descriptive analysis with SPSS for the cause of delays and analysis by Borda method to cause waste time factors. From the factors that cause delays and waste time gained from some elements of the worker, there will be a ranking analysis and known major factors.

Keywords
Delay factor, Waste time factor, Construction Management Construction project.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/FUNxnk698XHm

Corresponding Author
Elfindah Princes

Institutions
Bina Nusantara University

Abstract
Ambidextirity has been a great solution for many problems so far especially in the world of industry. The swift and unpredictable changes in the market have pushed the industry to integrate ambidextrous capabilities in all aspects, in this case Modern Manufacturing process. Manufacturing talks about the Supply Chain Management from the beginning until the products reach the markets. There has been so many debates about how Ambidextirity will effect the Modern Manufacturing, will it create burdens or instead will it give positive effects? The previous researches have been contradictory between one another. Using systematic literature research, the writer will analyse the needs of integrating ambidextirity into the Modern Manufacturing Era of Industry 4.0 to increase the competitive advantage for the company.

Keywords
Ambidextirity; modern manufacturing ; industry 4.0 ; competitive advantage

Topic
Operation and Supply Chain

Link: https://ifory.id/abstract/UDu2mtkPvWCV

Corresponding Author
Elfindah Princes

Institutions
Bina Nusantara University, Jakarta, Indonesia
University of Queensland, Brisbane, Australia

Abstract
Modern technology has set the business competition to a much higher level. With the increasing number of population all around the world, the proper supply chain management to ensure products availability is inevitably required. Modern Manufacturing industry must put in extra efforts in all fields, especiallly in the manufacturing process to make the products are ready on time, at the right place, for designated customers. This will certainly be not easy because the world is changing continuously. Using systematic literature review, this paper will discuss the disruptive challenges faced by modern manufacturing industry and the alternative solutions.

Keywords
supply chain management ; supply chain; disruptive challenges

Topic
Operation and Supply Chain

Link: https://ifory.id/abstract/U8wDGWqNbKrV

Corresponding Author
Yuslinda Annisa

Institutions
Universitas Negeri Malang

Abstract
The tribes in Indonesia are vary. Tengger tribe is one of the Indonesian tribes that located in Bromo Tengger Semeru NationalPark (BTSNP). BTSNP area has a very high diversity of plants. Various types of plants were used by Tengger Tribe in any field such as medicine, food sources including animal feed, industry and households, building materials, ecology, and traditional rituals. Based on interview with key informant called ‘Dukun- and Tengger tribe local people were found that Physalis angulata (local name: Ciplukan gunung) is the most used within Tengger tribe. They used P. angulata to treat any kind of diseases especially keep heart and lung in healthy condition. Tengger tribe used P. angulate by boiling in certain time then drink it as a tonic. The aims of this research were to analyze active compound from decoction of P. angulate that has anti-inflammatory agent. High Performance Liquid Chromatography (HPLC) result showed that decoction of P. angulate contained with active compound, one of them was Benzaldehyde. In silico study between benzaldehyde and cyclooxygenase 1 (COX-1) resulted that benzaldehyde has potency as inhibitor for COX-1. COX-1 is involved in inflammatory pathway. The inhibition towards COX-1 resulted on decreasing of inflammation. P. angulate has function as anti-inflammation.

Keywords
Tengger tribe, Bromo Tengger Semeru National Park (BTSNP), Physalis angulata, anti-inflammation, Cyclooxygenase 1 (COX-1)

Topic
Bioinformatics

Link: https://ifory.id/abstract/83VEhDkXzmru

Corresponding Author
Nurul Fadilah

Institutions
Biology, Faculty of Mathematics and Natural Sciences, State University of Surabaya
Jalan Ketintang, Ketintang, Gayungan, Kota Surabaya, Jawa Timur 60231
*nurulfadilahwassharofah[at]gmail.com

Abstract
Chrisan flower is one of decorated flower with hight quality to cultivated by Indonesian citizen. However, but in cultivation process had one of problem is Karat Putih disease coused by Puccinia horiana Henn. Using biofungicide from betel leaf extract (Piper betle Linn.) one of solution for this problem. The purpose from this research is know effectiveness from betel leaf extract as biofungicide to solve Karat Putih disease and know consentration of betel leaf to impede growth fungus Puccinia horiana Henn. This reaseach have been 7 month, begun May-November 2018. This research is experimental which using Random Plans Complex (RAL) Method with 5 repititions. The treatment be differentiate as many concentration of betel leaf, like: 0%, 30%, 40%, 50%, 60%, and 100%. The parameter of this research is measuring diameter of Karat Putih fungus everyday until 5 days. The result indicate the 40% concentration of betel leaf is most effective to impeded growth fungus Puccinia horiana Henn until diameter of growth only 0,3% (the most impeded).

Keywords
Betel leaf extract, Karat Putih Disease, Fungus, Biofungicide, Chrisan flower

Topic
Botany

Link: https://ifory.id/abstract/tc8FpxvH7wY9

Corresponding Author
Andrian Budi Prasetyo

Institutions
Department of Accounting, Faculty of Economics, Universitas Diponegoro

Abstract
The purpose of this research is to examine the effect of financial ratio to detect fraud in financial reporting in the company. The financial ratio used are leverage, profitability, asset composition, liquidity, and capital turnover ratio. This research was conducted with quantitative methods using secondary data. The secondary data from a list of cases subject to sanctions by the Financial Services Authority (OJK) for the warning category VIII.G.7 regarding the presentation of financial statements in 2008-2015 and the annual reports of companies listed on the IDX. The population of this research is the companies listed on the Stock Exchange, then the samples are taken based on purposive sampling with the criteria of non-financial companies and have the data needed in this research. Fraud companies are then paired with non-Fraud companies with similarities in industry and the size of the companys assets. This research uses logistic regression statistics because the dependent variable is a dummy (non metric) variable, while the independent variable is a metric and non-metric variable. The results of this research are leverage ratios have a positive effect on financial reporting fraud and the capital turnover ratio negatively affects financial reporting fraud . Meanwhile, profitability ratios, asset composition ratios and liquidity ratios have no effect on fraudulent financial reporting.

Keywords
fraud, financial ratio, financial reporting

Topic
Accounting

Link: https://ifory.id/abstract/XzPKRuV3WbTj

Corresponding Author
Imam Djati Widodo

Institutions
1 Industrial Engineering Department, Universitas Islam Indonesia, Yogyakarta, indonesia
2 Industrial Engineering Department, Universitas Islam Indonesia, Yogyakarta, Indonesia,
3 Industrial Engineering Department, Universitas Islam Indonesia, Yogyakarta, Indonesia

Abstract
The quality of the electrical cable can be determined by resistance of insulator and conductor. The higher the resistance of the insulator and the lower the resistance of the conductor, the higher the quality of the cable. NYM 2x1.5 mm2 cable produced by Corporate X has an isolator resistance of 84.25 Ω and conductor resistance of 11.976 Ω. Even though the products meets Indonesia National Standard (SNI), but to win the competition, the company needs to improve the quality of their products with competitive prices. There are some factors influencing the resistance of insulators and conductor. They are core extruder speed (A), non-core extruder speed (B), cooling water temperature (C), PVC melting temperature (C), cabling speed (D), copper elongation (E), PVC density (F) and human error (F). In this research, design of experiment, based on Taguchi method, is used to improve cable resistance. Because of having two responses, the optimization process uses the TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) method. The result showed that the combination of levels of these factors could produce average insulator resistance of 95.70 Ω (increasing by 8.90 Ω), and the average resistance of the conductor 11.908 Ω (decreases down by 0.057 Ω). This optimal condition was obtained by combining the levels of factor A1 B1 C1 D2 E2 F1 G1, i.e. the system works at 140 rpm cabling speed, non core extruder speed 2.9 m/s, core extruder speed 2.9 m/s, cooling water temperature 20 0C, copper elongation 150 - 250, temperature for melting PVC 160 0C-165 0C and PVC density 154,95-155 kg/m3. Sensitivity analysis to accommodate the dynamic weighting of product quality attributes indicated that the changes in the order of priority attribute weights on a formal scale system used to convert linguistic forms into fuzzy numbers were not sensitive to optimal factor level combinations

Keywords
Factor Level Combination, Insulator and Conductor Resistance, Sensitivity Analysis, Taguchi, TOPSIS

Topic
Industrial Engineering

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

Corresponding Author
Tasnim Tasnim

Institutions
Sekolah Tinggi Ilmu Kesehatan Mandala Waluya Kendari

Abstract
Objectives: Currently, there are huge fast food traders in Indonesia, including in Kendari City. However, there are a few of fast food traders who are supervised by environmental staff in Health Center in Kendari city, including in Poasia Health Center. This is because there are only some environmental staff in Poasia Health Center compared to numbers of fast food traders. Hence, community participation in fast food control is necessary. Therefore, this study aimed to identify communities who can participate in fast food control in Poasia Health Center in Kendari City. Methods: This study was conducted in Poasia Health Center in Kendari City from April to October 2018. There were 17 cadres who were recruited in this study and they controlled 39 fast food traders. This study applied Quasi experiment with The One-Group Pretest-Post test Design. Cadres- age is independent variable and fast food traders- hygiene and sanitation behavior become dependent variable. Data analysis used linear regression. Main findings: This study found that cadre-s age significant associated with fast food traders- hygiene and sanitation behavior (p-value=0.000< 0.05). The younger cadres (<45 years) tended to change fast food traders- hygiene and sanitation behavior towards better behavior to manage their fast food, compared to the older cadres (>45 years). Cadres who aged under 45 years have high mobilization and intensity to control fast food trader. Conclusion: Volunteer community such as cadres can participate to control the fast food traders in Poasia Health Center in Kendari City. The younger cadres are effective to help environmental staff in Health Center to increase food hygiene and sanitation.

Keywords
Community; Fast Food; Participate; Control; Hygiene and Sanitation

Topic
Community Health

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

Corresponding Author
Sursur Hadhad

Institutions
Universitas Sana Sini

Abstract
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Keywords
TESTING Keywords

Topic
Entrepreneurship, SME, and Family Business

Link: https://ifory.id/abstract/qnJ4GbYtAcBM

Corresponding Author
Ganesha Antarnusa

Institutions
1 Department of Physics Education, Universitas Sultang Ageng Tirtayasa, Indonesia
2 Department of Physics, Universitas Gadjah Mada, Yogyakarta, Indonesia

Abstract
In this paper a potential use of giant magnetoresistance (GMR) sensors in Wheatstone bridge is presented in order to detect polyethylene glycol (PEG)-coated magnetite (Fe3O4) nanoparticles as biomolecular labels (nano-tags) in magneto-biodetection technology. The GMR Co/Cu multilayer structures were fabricated by DC magnetron sputtering method. The magnetoresistance (MR) of Co/Cu was 2.7%. The Fe3O4 were synthesized via co-precipitation method, exhibiting a soft magnetic behavior with saturation magnetization (M_s) of 77.2 emu/gram and coercivity (H_c) of 49 Oe respectively. X-ray diffraction (XRD) patterns and transmission electron microscopy (TEM) images showed that Fe3O4 was well crystallized and confirmed the formation of inverse spinel structure with an average size of around 12 nm. Formation of PEG/Fe3O4 was confirmed by Fourier transform infrared spectroscopy (FTIR). As the PEG concentration is decreased the overall saturation magnetization of the coated nanoparticles initially decreases due to the decrease iron content with a minimum of 37.2 emu/gram for nanoparticles with the smallest Fe3O4 content. Various applied magnetic fields of 0-650 Gauss have been performed using electromagnetic with the various currents of 0-5 A. The final value of the output voltage signals for the Fe3O4 is 1.76 mV. The output voltage changes with the increase of concentration of PEG. The developed sensors are used to monitor real-time binding signals and portable into a Wheatstone bridge for the magneto-biodetection at ultra-low concentration using magnetic nanoparticles coated with PEG as reporters.

Keywords
giant magnetoresistance; Wheatstone bridge; Fe3O4; magneto-biodetection

Topic
Nano Science and Technology

Link: https://ifory.id/abstract/rXdCmETxvLG9

Corresponding Author
NUR AINI MD NOR

Institutions
¹ Centre of Studies for Surveying Science and Geomatics, UiTM Shah Alam, Malaysia
² Oceanography Study Program, Faculty of Earth Science and Technology, Institute Technology of Bandung, Indonesia

Abstract
Kuala Terengganu is one of the areas which were subjected to critical erosion in Malaysia. It is believed that human activities became one of the causes of this incident. Kuala Terengganu is location of Sultan Mahmud Airport. In January 2008, the Malaysia government approved to upgrade the airport included improvement to the terminal and runway extension. The construction is located near the coast, therefore it is necessary to monitor the coast of Kuala Terengganu. This study focuses on the shoreline change detection along the Kuala Terengganu during ten years period between 2007 until 2017 using LANDSAT Images. Digital Shoreline Analysis System (DSAS) is an extension for the ArcGis was used to identify and measure erosion (shoreline retreat) and accretion (shoreline advance) along the coast. From the analysis, the action will take better information disclosure and state government can take action to reduce the erosion. Environmental impact assessment benefits occur in many guises such as improved project design and improved decision making.

Keywords
DSAS, LANDSAT, Shoreline change, Erosion, Accretion

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/fdje6HRq3vBP

Corresponding Author
NUR SYAHIRAH HASHIM

Institutions
¹ Centre of Studies for Surveying Science and Geomatics, UiTM Shah Alam, Malaysia
² Geodesy and Geomatics Engineering Study Program, Faculty of Earth Science and Technology, Institute Technology of Bandung, Indonesia

Abstract
A hydrographic survey can be a cumbersome sometimes. The data can be sparse, providing it can be costly and it took a lot of manpower and time. Space-borne data like multispectral images can be a helpful tool towards hydrographic survey, especially in the shallow water area. The company like EOMAP and TCARTA make use of satellite-derived bathymetry as a tool and product. Would it be great if it also can be applied in Malaysia especially on the low-risk job or survey planning. Enlarging the survey area and providing a continuous and detailed water depth information is the main objective in this research. In order to complement with convenience and cost reduction, the author used Landsat 8 "(free downloadable images)" in this research. Structuring the procedure is the main part of the process involving pre-processing and processing step until the final product obtained. In this research, the author used various kind of bathymetry algorithms such as Single-Band Algorithm, Green-Band Algorithm, and Stumpf, and the author also uses Principal Component Analysis tool from ArcMap and Spear Relative Water Depth: Log-Ratio Transform tool from ENVI to derived bathymetry. All of this bathymetry algorithm/tool gives out different technique with different statistical approach. The final result then will be compared and evaluated with Single-Beam Echosounder data (ground truth).

Keywords
Hydrography Survey, Shallow Water Area, Satellite-Derived Bathymetry, Bathymetry Mapping

Topic
Coastal and Ocean Dynamics

Link: https://ifory.id/abstract/T6E2jndpxkfJ

Corresponding Author
Akbar Tahir

Institutions
Universitas Hasanuddin

Abstract
Plastic pollution has universally known accumulated in all compartments and accelerating threat to the sustainability of our planet. A field survey to examine the occurrence of microplastics in ancient sea water evaporation technology of ponds at Pallengu, Jeneponto District of South Sulawesi Province was conducted in July 2018. From this traditional sea salt producing ponds, samples of water, sediment and freshly produced salts were collected. Samples of water and sediments (16 samples respectively) were collected from points at adjacent sea, primary, secondary and tertiary canals, and sedimentation/warming ponds. Salts (12 samples) were only collected at salt producing ponds. Of the 12 samples of salt observed, we found 7 samples were positively contaminated with 29 particles of microplastics (MPs) predominated by line and fragment forms (with 58.3% of total contamination levels). Total contamination level of MPs on sediments were accounted for 50%, where 41 MPs particles were observed. From 16 water samples collected, there are 31 MPs discovered from 11 water samples observed (total contamination 68.75%). Interestingly, sampling spots at sedimentation/warming pools were found to be the locations with highest occurrence of MPs in both water and sediment samples. Fourier transform infra-red spectroscopy (FT-IR) analysis has revealed 3 kinds of polymers, i.e. EVA (41.7%), PE (33.3%) and PP (25%). From statistical analysis there was no significant difference found on MPs occurrence from kinds of samples collected, although there was a trend of correlation between MPs count in both water and sediments. With microplastics abundance of 100 particles/kg salt, we presumed that continuous consumption by people will end up with possible accumulation of potentially absorbed of various toxic chemical pollutants which present in sea water as salt raw materials. The need for robust and practical strategy in water quality management for reduction of microplastics contamination in consumed salts would be a must.

Keywords
microplastics, sea salt, water management, Jeneponto, Indonesia

Topic
Marine Resources, Conversation and ICZM

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

Corresponding Author
Hafiz Rizaldi

Institutions
a Department of Geophysical Engineering, Faculty of Civil, Environmental and Geo Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
b Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung 40132, Indonesia

Abstract
Karangsambung is one of Indonesia a geological site that has an expert complexity structure. Many outcrop has been unfold here, especially sedimentary rocks. This research has been conducted to determine the pattern of magnetic susceptibility and the status of sedimentary rocks In Gending River, Karangsambung, Central Java. Magnetic susceptibility parameters have been measured by Bartington MS2B from 24 samples that taken in Gending River, Karangsambung. The result shows that the maximum susceptibility is distributed around northward and eastward, while the intermediate and minimum susceptibility are distributed around nortward-eastward and eastward-southward. The measurements show that samples from Kaligending River on waturanda formation had the highest mass-specific magnetic susceptibility values, varying approximately from 1000 to 4000 × 10-8 m3 /kg. Contrarily, samples from the totogan formation had a much lower mass-specific magnetic susceptibility, varying approximately from 1000 to 2000 × 10-8 m3 /kg unexpectedly. The difference in magnetic susceptibility is alleged to the differences between magnetic mineral content in these formations.

Keywords
Karangsambung, Sedimentary Rocks, Magnetic susceptibility

Topic
Rock Magnetism

Link: https://ifory.id/abstract/H9CtRvPKQEWB

Corresponding Author
Denizar Abdurrahman Miraj

Institutions
Department of Islamic Economics
Faculty of Economics and Business
Universitas Airlangga

Abstract
Environmental problem is a very complex matter, and human beings as leaders on earth are forced to preserve the resources and take responsibility on the sustainability of the ecosystem. This research provides information using library research that is sourced from related literature and research that have been conducted in the past. The aim of this research is to know about the application of environmental resources economics on welcoming sustainable development. A sustainable application points to policies that have been made by human beings as leaders on earth, in form of government system such as government economic policy that is used for a better, sustainable development.

Keywords
Islamic environmental resource economics, economic policy, political policy, caliph

Topic
Normative Environmental Economics

Link: https://ifory.id/abstract/hM3gAR94jFnQ

Corresponding Author
Dian Filianti

Institutions
Fakultas Ekonomi dan Bisnis Universitas Airlangga

Abstract
This research aims to determine the compatibility of disclosure in social responsibility by adopting Islamic Social Reporting (ISR) for the Islamic banks in Indonesia. This research adopted the descriptive analysis in the qualitative approach and used content analysis technique. There are 13 Islamic banks in Indonesia that are the object of research. Data used is secondary data of the annual reports of total 13 Islamic were downloaded from the banks official website. The findings of this research indicated that Islamic banks in Indonesia enable to disclose the compatibility of social disclosure but not full disclosure yet. Furthermore, the results revealed that 2 out of 13 Islamic banks are not compatible with disclosure in social responsibility and 2 out of 6 categories are not compatible with Islamic Social Reporting (ISR), which are labor and environment section.

Keywords
Corporate Social Responsibility, Islamic Social Reporting Index, Islamic Banking

Topic
Sustainability Reporting

Link: https://ifory.id/abstract/BYwXtHVe2LDJ

Corresponding Author
Yosi Gumala

Institutions
1Program Studi Pendidikan Dasar, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
2Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
3Departemen Pendidikan Guru Sekolah Dasar, Universitas Bhayangkara Jakarta Raya, Jl. Darmawangsa 1 No 1 Jakarta 12140, Indonesia
4Prodi Pendidikan Guru Madrasah Ibtidaiyah, IAIN Tulungagung, Jl Mayor Sujadi No. 46 Tulungagung, Indonesia
5Prodi Pendidikan Guru Sekolah Dasar, STKIP Sebelas April, Jl Angkrek No. 19 Sumedang 45323, Indonesia
5Prodi Pendidikan Guru Sekolah Dasar, Universitas Syiah Kuala, Jl Tgk Hasan Krueng Kalee Banda Aceh 23111, Indonesia

Abstract
Assessments are prevailing implements for informing teachers and students approximately where student thoughtful stances with relation to a knowledge objective. However, limited readings deliver qualitative investigates of assessment through an item. This research practices a context of nine scopes of actual assessment evidence in science classrooms to associate more and fewer effective assessment among a purposive sample of elementary pre-service teacher in science. Contributing teachers collected five steps of assessment in reading, answering discussing, explaining, and creating related on problem solving skill. Our evaluation specified that actual dimensions, such as setting goals, aligning assessments with goals, occurrence, and selection of assessment, can be addressed relatively easily by teachers whose overall collection. Yet, dimensions that takings interested in account the quality or depth of student learning, such as the cognitive difficulty of the assignment, the type of response that is providing, or how well teachers adapt instruction based on information from assessments, differ more pointedly among teachers in our model. The conceptualization of these five dimensions beside with indication from actual classrooms across following instructional parts for professional improvement and teacher education

Keywords
RADEC, Science, Assessing, pre-service teacher

Topic
Chemistry Education

Link: https://ifory.id/abstract/KVTfvtMAm4Db

Corresponding Author
Faizatul Mabruroh

Institutions
a) Physics Education, UIN Raden Fatah Palembang.
Jalan Prof.KH.Zainal Abidin Fikry km.3,5 Palembang.
*faizatul.mabruroh_uin[at]radenfatah.ac.id
b) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi
No. 229, Bandung 40154, Indonesia.

Abstract
This study was aimed to construct a test instrument for assess critical thinking skills of high school students on the concept vibration and wave that are focused on sound wave. The research using a mixed method with sequential exploratory design, consisting of: 1) the preliminary study phase; 2) the design and review phase; 3) testing phase the test instrument. Test instruments in the form of essays, consisting of 18 questions contain 5 indicators and 8 sub indicators of critical thinking skills expressed by Ennis, with the questions that are qualitative and contextual. Analysis of implementation test results using hypothesis testing to different average values to get an overview of the test instruments ability to distinguish between the critical thinking skills of students who get learning process which to exercise critical thinking skills of students and who get learning process which not to exercise critical thinking skills of students. ANOVA one way using to get a picture of the ability of instruments are constructed in identifying similarities critical thinking skills among students who had learning process to exercise critical thinking skills using problem based learning, learning cycle model (learning cycle) 5E, and inquiry learning model. Pearson product moment correlation test was performed to obtain the relationship between critical thinking skills with mastery of leraning materials on students- test implementation.

Keywords
critical thinking skills, critical thinking skills test instrument, vibration and wave, sound wave.

Topic
Physics Education

Link: https://ifory.id/abstract/wPCRe7tDQLYV

Corresponding Author
Ai Mahmudatussaadah

Institutions
1 Universitas Pendidikan Indonesia, Jl Dr. Setiabudhi 229 Bandung Indonesia;
2 STIH Institut Teknologi Bandung, Jl. Jatinangor Sumedang Indonesia

Abstract
Purple sweet potato is one of the potential sources of antioxidants. Anthocyanin in purple sweet potato is natural to experience enzymatic oxidation after contact with oxygen. The oxidation process causes the brown color to show a decrease in the amount of anthocyanin. The oxidation process was caused due to enzymatic activity. The purpose of this study was to describe the effect of steaming on color and the amount of anthocyanin of sweet potato flour. The method used is a one-factor experiment, namely cooking with water vapor. Stages carried out by material preparation, wet cooking, drying, grinding, and sieving. Color analysis using chromameter, and total anthocyanin amount using the pH difference method. The results showed that the steaming process gave bluish purple, and the amount of anthocyanin was higher than without steaming. This study implies that the steam blanching process of sweet potatoes can maintain the purple color of fresh sweet potatoes.

Keywords
Anthocyanin; Flour; Purple sweet potato; Steaming

Topic
Chemistry

Link: https://ifory.id/abstract/m2QkgxHJGVbd

Corresponding Author
Fatma Widyastuti

Institutions
Universitas Sebelas Maret Surakarta

Abstract
This research aims to improve students creative thinking skills through indigenous knowledge. Creative thinking skills are one of HOTS (high level thinking skills) that are needed in the era of industrial revolution 4.0. Indigenous knowledge is knowledge held by local communities where the community lives, interacts, socializes, learns, and activities related to daily life. By exploring indigenous knowledge, it is expected to be able to improve students creative thinking skills in finding solutions and solving problems faced in the current industrial era 4.0. There were 34 participants in this research who were students of Biology Education in the first semester. Furthermore, the method used in this study is descriptive qualitative, while the data analysis used is the analysis of the Rasch model.

Keywords
creative thinking, Indigenous Knowledge, Divergent thinking, HOTS, Industrial revolution 4.0

Topic
Integrated Science Education

Link: https://ifory.id/abstract/2xWHXqC7EvjN

Corresponding Author
Hernawati Hernawati

Institutions
Departement of Biology Education
Universitas Pendidikan Indonesia
Bandung

Abstract
Amphibians can be used as environmental bioindicators or health measures of an environment because they are sensitive to changes in environmental factors. Some of the main habitat of amphibians are primary and secondary forests, swamps, rivers, lakes and ponds. One of the endangered amphibians were Rhacophorus reinwardtii. The secondary forest in Ranca Upas Ciwidey was one of the habitat where Rhacophorus reinwardtii can be found. There are many significant changes to this region due to the expansion of the campground and tourist areas, thus affecting the population of Rhacophorus reinwardtii. This study aims to describe the habitat characteristics and population estimation of Rhacophorus reinwardtii in the secondary forest Ranca Upas. Habitat characteristics were analyzed descriptively. Habitat and population data are collected in two locations near rivers and stagnant water. The research area has measured 522m2 and width of 528m2. Capture-Mark-Release-Recapture Method was used in each region to collect population data. Population abundance were calculated using the Schnabel formula, population distribution were estimated using the Morista index. The caught frogs were marked using a modified shoelace. Habitat Rhacophorus reinwardtii was of river and stagnant water with an altitude of 1630-1680m asl, pH of water neutral and acidic, average velocity of the river was 0m/s and 0.04m/s, the water substrates were sand and mud, with average temperature air 16.7ºC and 17ºC, average water temperature of 14.7ºC, average humidity of air 94%. The type of plant that is often the habitat of Rhacophorus reinwardtii was Brugmansia sp. and Cyathea sp. The population estimation of the two observation areas were 45 individuals and 30 individuals with a density of 9 individuals/100m2 and 6 individuals/100m2. It can be concluded that the population distribution of Rhacophorus reinwardtii in both habitats clustered.

Keywords
Keywords: Rhacophorus reinwardtii, habitat, abundance, density, distribution.

Topic
Biology

Link: https://ifory.id/abstract/v3exZcFGdHma

Corresponding Author
Septinaningrum -

Institutions
1Program Studi Pendidikan Dasar, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
2Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229 Bandung 40154, Indonesia
3Jurusan Pendidikan Guru Madrasah Ibtidaiyah, IAIN Tulungagung, Jl. Mayor Sujadi Timur No. 46 Tulungagung 66221, Indonesia
4Departemen Pendidikan Guru Sekolah Dasar, Universitas Bhayangkara Jakarta Raya, Jl. Darmawangsa 1 No 1 Jakarta 12140, Indonesia
5 Prodi Pendidikan Guru Sekolah Dasar, STKIP Sebelas April, Jl. Angkrek No. 19 Sumedang 45323, Indosesia
6 Prodi Pendidikan Guru Sekolah Dasar, Universitas Syah Kuala, Jl. Tgk Hasan Krueng Kalee Banda Aceh 23111, Indonesia

Abstract
Abstract. This research was aimed at investigating the development of students- creative thinking skill through project-project oriented Read-Answer-Discuss-Explain-and Create (RADEC) learning model. The background of this research was the low students- creative thinking skill at the fourth semester of group G department of PGMI, IAIN Tulungagung in Subject of Biology for Elementary Education. Project-oriented RADEC learning model was considered effective to solve the problem. The excellences of this learning model is that its syntactic stage which is certain, easy to understand, and can be implemented based on the students- characteristics in Indonesia. Moreover, the create stage in this model can integrate knowledge and experience through project so that the students- stimulating and accommodating ability of the students- creative ideas. This research applied quantitative research method by using pre experiment one group pre test post test design. The instruments of data collection were test, observation sheet, interview, and field notes. The result of the research showed that there was a significant development of the students- creative thinking skill such as 40. 1%, flexibility 43. 81%, originality 37%, and elaboration 45. 04%. Therefore, it can be concluded that project-project oriented RADEC learning model can be used to develop the fourth students- creative thinking skill in Subject of Biology for Elementary School Department of PGMI at IAIN Tulung Agung 2018/2019.

Keywords
RADEC learning model, Project-oriented, Creative Thinking Skill

Topic
Biology Education

Link: https://ifory.id/abstract/WqfDMudVZUj7

Corresponding Author
Budi Utami

Institutions
Universitas Sebelas Maret Surakarta

Abstract
21st century skills are very important for students, Communication, Collaboration, Critical Thinking and Problem Solving, and Creativity and Innovation (known as 4 C). Faciones critical thinking skills include interpretation, analysis, evaluation, inference, explanation, and selfregulation. This study is to determine the ability of students analytical thinking skills in chemistry lessons in Chemical Equilibrium material and to determine the suitability of the items of performance assessment rubric on the assessment of students analytical thinking skills. The study used a quantitative descriptive method and was analyzed using the RASCH model. The research subjects were XI gradeof science students in one of the high schools in Surakarta, Central Java, Indonesia. The results of the study revealed that there were still students with low analytical skills so that appropriate learning models were needed that could improve students analytical skills. Based on the results of the analysis of the RASCH model it is known that item measurement for each item in the rubric of performance assessment is a good category and can be used to measure students analytical skills.

Keywords
performance assessment rubric, analytical thinking skills, chemistry lesson

Topic
Chemistry Education

Link: https://ifory.id/abstract/9nYve28rVRbt

Corresponding Author
Nurasyah Dewi Napitupulu

Institutions
(a) Program Studi Pendidikan Ilmu Pengetahuan Alam, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Kota Bandung 40154
(b) Program Studi Pendidikan Fisika, Universitas Tadulako, Jl. Soekarno Hatta KM. 9, Tondo, Kota Palu 94148 Email: *nurdewi66[at]yahoo.com

Abstract
The unimodel is frequently used to learn any science concepts model of learning whereas the domain of science consists of some concepts that need various models as multimodel to conceive the science concepts correctly. There are three models experimented to 22 pre-service student Physics teachers as In-EcoP, PB-EcoP, and PjB-EcoP used to learn ecological phenomena. Climate change, deforestation, and used resource energy are the domain of ecological phenomena. The major aim of this research is to analyze the interaction effect between multimodel, ecological phenomena, and students competencies. The instruments of the equality test were valid and reliable. The data were analyzed by ANOVA using SPSS. The result of analyses showed the interaction effect In-EcoP model dissimilar with PB-EcoP and PjB-EcoP models toward ecological phenomena. This difference suggests a suitable model based on the matter of course effect to students learning outcomes as cognitive and affective domains.

Keywords
multimodel, ecopedagogy, ecological phenomena

Topic
Integrated Science Education

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