Indonesia Conference Directory

Corresponding Author
Nuraeni Kadir

Institutions
Faculty of Economics and Business, Hasanuddin University.

Abstract
The silk business is demanded to be more aggressive in the entrepreneurship activities of silk development. This study aims to determine the growth of the silk business, to analyse the business development that has been applied by silk weavers, and to discover the proper model of silk business development by silk weavers. The population was 544 silk weavers who carry out the silk business. The sample consisted of 235 subjects and determined by the Slovin Formula. The data analysis derived from SAM AMOS method. The result showed that positive and significant leverage on the expansion of silk business towards the development model and the evaluation of the silk business; positive and significant impact on the assessment of weaver-s silk business towards the development of silk business. Otherwise, there is an indirect impact on the development of the silk business through positive and significant evaluation at the growth of silk business to the development model of the silk business. However, business development must be constantly encouraged to create marketing orientation, customer relations, consumer decisions, and market control. Therefore, by business development evaluation, it would be a conveniently generate or fabricate any integrated business development model.

Keywords
Business Development, Silk Development Model

Topic
Social and Economy Framework of Energy

Link: https://ifory.id/abstract/VZ6gzrqcXLh9

Corresponding Author
Akhmad Mustafa

Institutions
a Research Institute for Coastal Aquaculture and Fisheries Extension, Maros, Indonesia
* E-mail: akhmadmustafa[at]yahoo.com

b University of the Sunshine Coast, Queensland, Australia

Abstract
Non-shrimp commodities diversification is an alternative for increasing aquaculture production, including brackishwater ponds in Bontoa Subdistrict, Maros Regency, South Sulawesi Province, Indonesia. Therefore, a study was conducted to determine land characteristics in an effort to determine land suitability for tilapia (Oreochromis niloticus) in ponds at different seasons. Factors considered in determining land characteristics and suitability are: topography and tide, soil quality, water quality, and climate. Spatial analysis in Geographic Information Systems are used in determining land suitability for tilapia in ponds. The results showed that land of ponds in Bontoa Subdistrict has a slope of less than 2%, a tide of 1.38 m, dominated by acid sulfate soil, low water salinity in rainy season and relatively high of salinity in dry season with rainfall reaches 3,531 mm/year. In rainy season, from 3,072.6 ha of ponds in Bontoa Subdistrict, 252.2 ha classified as highly suitable (S1 class) and 2,820.4 ha is moderately suitable (S2 class) for tilapia, while in dry season which is moderately suitable (S2 class) area of 2,207.9 ha and classified as not suitable (N class) area of 864.7 ha. High water salinity in dry season in Bontoa Subdistrict is main limiting factor for tilapia in ponds.

Keywords
characteristic, land suitability, brackishwater ponds, Oreochromis niloticus, Maros Regency

Topic
Agriculture system

Link: https://ifory.id/abstract/HBXLzA64Pmw7

Corresponding Author
Parea Rusan Rangan

Institutions
University of Hasanuddin, Makassar, Indonesia

Abstract
The geopolymer of fly ash (FA), rice straw ash (RSA) and laterite soil (LS) was prepared. The strength of the geopolymer mortar with FA/RSA/LS percentage ratio of 41,67/16,67/41,67 was tested. The geopolymer was activated with sodium hydroxide (NaOH). Effect on air curing on compressive strength as well as the optimum mix proportion of geopolymer mortar was investigated. It is possible to achieve compressive strengths of 1.64 N/mm2, 1.72 N/mm2 and 3.22 N/mm2, respectively for the 12 M sodium hidroxide-activated geopolymer mortar after 3, 7 and 28 days of casting when air cured. Results indicated that the increase in curing period increased the compressive strength.

Keywords
fly ash, rice straw ash, laterite soil, geopolymer mortar

Topic
Waste to Energy Potential Resources

Link: https://ifory.id/abstract/8mpn9ALvTujQ

Corresponding Author
Rafiuddin Syam

Institutions
a)Mechanical Engineering Dept., Hasanuddin University
*rafiuddinsyam[at]gmail.com
b)National Nuclear Energy Agency of Indonesia
c)Electrical Engineering Dept., Hasanuddin University

Abstract
The research discusses about designing and examining underwater robot on a difficult-reach area. The instruction of underwater technology development takes an important role to support offshore industry facilities like reactors facilities. ROV also can be used to observe hi-risk area such as contaminated chemical area, hydrothermal exploration, also needs of safety forces company to change diver function with ROV. Here, the small underwater robot is used to detect leaks in reactors facilities. ROV which designed with ATMega microcontroller based equipped with 4 motors that able to control ROV motion on six degree of freedom (Surge, heave, up, yaw, roll, dan pitch). From the test result using 12 V 2200 mAh battery, motor attain speed up to 1811,36 rad/s. With maximum impetus 16,8 N and 0,19 Nm moment. From the robot-s observation concluded manual system control using remote Flysky 2,4 GHz, robot can move according to command and able to assist underwater observation activities.

Keywords
ROV, Underwater Robot, Control, Thruster, ATmega

Topic
Technology

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

Corresponding Author
Rafiuddin Syam

Institutions
a) Mechanical Engineering Dept., Hasanuddin University, Makassar, Indonesia
*rafiuddinsyam[at]gmail.com
b) Mechanical Engineering Dept., Universitas Muslim Indonesia, Makassar, Indonesia

Abstract
The purpose of this study is to do the simple maneuvers for robot manipulators as small firefighters. Design and experiments were carried out in the manipulator robot as a firefighter. The results obtained by simple maneuvers for the mini firefighting robot succeed with the optimum trajectory. The direct control method was carried out in this study by using Arduino Mega as an interface system. The conclusion of this study is that the robot can perform maneuvering through the path using the line follower robot method.

Keywords
Small Robot Firefighting, Arduino Uno, Control System, Robot Manipulator

Topic
Technology

Link: https://ifory.id/abstract/x9Dj7PWRGgYB

Corresponding Author
Rudy Immanuel Pundising

Institutions
Rudy Immanuel Pundising (a), Laode Asrul (b), Mahyuddin (c)
a. Department of Agribusiness, Graduate School Of Hasanuddin University, Indonesia
Kampus Unhas Tamalanrea. Jalan Perintis Kemerdekaan KM. 10. Makassar,
South Sulawesi.
*email : rudypundising83[at]gmail.com
b. Department of Agronomy. Faculty of Agriculture. Hasanuddin University, Indonesia
Kampus Unhas Tamalanrea. Jalan Perintis Kemerdekaan KM. 10. Makassar,
South Sulawesi.
c. Social-Economy of Agriculture Study Program, Faculty of Agriculture.
Hasanuddin University. Indonesia
Kampus Unhas Tamalanrea. Jalan Perintis Kemerdekaan KM. 10. Makassar,
South Sulawesi.

Abstract
PENGARUH COMBINE HARVESTER TERHADAP SOSIAL EKONOMI PETANI PADI SAWAH DI KABUPATEN GOWA Laode Asrul1, Mahyuddin1, Rudy Immanuel Pundising2, 1Dosen Program studi Agribisinis Pasca Sarjana Universitas Hasanuddin 2Mahasiswa Program Studi Agribisnis Pasca Sarjana Universitas Hasanuddin 081355954727, rudypundising83@gmail.com Combine hasvester is a rice harvesting machine technology that was originally developed in South Korea and Japan. Combine hasvester basically as a rice harvester machine that helps farmers in harvesting rice. This technology is very helpful in terms of labor, time, harvest costs and harvesting speed. Increased rice production in the province of South Sulawesi is not only intended to meet regional needs, but it is expected that this increase can contribute to an increase in national rice production. In Gowa Regency, that agricultural equipment and machinery (combine harvester) has been applied to farmers to assist farmers in conducting their farming business, rice production has also begun to increase. With the empowerment of farmers, especially in the application of the combine harvester, the farmers become empowered and have knowledge, so that the sustainability of increased production can be realized. Of course, the production will also have a positive impact on the economy of farmer households that can continue to run well in accordance with the wheels of the daily economy and meet the needs of farmers household lives.

Keywords
Increase in income, rice, effectiveness of combine harvester

Topic
Agriculture system

Link: https://ifory.id/abstract/t76nBYNUZDrP

Corresponding Author
Eka Cahya Prima

Institutions
Universitas Pendidikan Indonesia

Abstract
This research aims to determine the effectiveness of Stellarium as an Interactive Multimedia to students understanding and motivation in learning solar system. This study used quasi experimental design. The sampling used was convenience sampling. The research was conduct in one of private school in Bandung which number of students is 41. The Stellarium used is windows based 0.15.1 version. The Objective Test Item and Questionnaire were used as research instrument. These instruments were given to experimental and control class as pretest and posttest. According to the analyses result, the value of Normalized gain in experimental class and control class is 0.33 and 0.2. According Independent sample test result the hypothesis in this research was accepted. The value of sig (2-tailed) is 0.019 with significance value is 0.05. Thus, the result of this research are: There is different of students- understanding using stellarium in learning solar system; The students- motivation in learning solar system using stellarium is categorized as adequately motivated.

Keywords
Interactive Multimedia, Solar System, Stellarium, Students- Motivation, Students- understanding

Topic
Integrated Science Education

Link: https://ifory.id/abstract/X9vdzMrfF8NA

Corresponding Author
Eka Cahya Prima

Institutions
Universitas Pendidikan Indonesia

Abstract
The uses of technology commonly exist and essential to nowadays live. Mobile learning is one of the learnings tools that is easily used in this era. The aim of mobile devices nowadays are improved, its function is enlarged because the mobile devices can be used anywhere and anytime to connect the information, processes, and communications. Students consider that the function of using mobile to their learning is more productive. Physics is one of study that students often confused and mistakenly judged as a difficult subject to be learned. The advanced technology used in teaching and learning intended the researcher to build a mobile learning application especially in physics materials that relate with the used of Arduino UNO in form of technology. Generally, the process of developing the mobile learning application consist of several steps: (1) the content analysis; (2) the material source analysis; (3) the user analysis; (4) the software necessity analysis; (5) the hardware necessity analysis; (6) the design stage of mobile learning application making which consists of learning materials, flowchart, storyboard, interface making and coding. The method that used in this research was descriptive. The participants were 22 students of private Junior High School in Bogor and 3 science teachers from each respectively Junior High School in Bandung and Bogor. The experts in content, language, and media are evaluated by the mobile learning application. The results show that the overall of mobile learning application based on Arduino UNO is adequately received a good evaluation from each aspect. The students and science teachers are greatly welcomed for its implementation.

Keywords
Mobile Learning, Android Application, Arduino UNO Projects, Students- Impression, Science Teachers- Responses

Topic
Integrated Science Education

Link: https://ifory.id/abstract/pP3XybEC9qGd

Corresponding Author
Suwardi Annas

Institutions
a) Department of Statistics, Universitas Negeri Makassar
Jalan Mallengkeri, Makassar 90224, Indonesia
*suwardi_annas[at]unm.ac.id

Abstract
The number of natural disasters in Indonesia is very high occurrences. However, the data collected based on natural disasters has a complexity data structure. One of the efforts to make prevention by grouping the areas of natural disaster. The proposed methods to analyze the data are k-means and Geographical Information System (GIS). The k-means method has mapped the areas of natural disaster based on districts into 3, 4, 5, 6 and 7 of clusters. This result showed that the best cluster resulted by 7 of clusters with the smallest root mean square standard deviation (RMSD) than other clusters. Although k-means has obtained the best cluster, however, it was difficult to present the clustering of natural disaster districts in the map. Therefore, a GIS method was used to improve the cluster visualization of k-means. The main purpose of GIS is to develop a visual map of the natural disaster districts according to a given cluster of the k-means. GIS method can be a useful tool to improve the visualization information of k-means clustering and enables interpretation of the disparities of natural disaster by districts in Indonesia.

Keywords
GIS; k-means; Natural disaster; RMSD

Topic
Mathematics

Link: https://ifory.id/abstract/3xpPWQ6Rd4z2

Corresponding Author
Eka Cahya Prima

Institutions
Universitas Pendidikan Indonesia

Abstract
The purpose of this research is to investigate the effect of lesson towards students- creative disposition and students- creativity in learning Newtons- Law and to investigate the relationship between students- creative disposition and students- creativity itself. The method that was used in this research was descriptive research. The sample was taken by cluster sampling technique which is joined by 77 students with the population of 8th-grade students at Junior High School in Garut. The data in this research is obtained through making a creative product and constructed questionnaire that is given to the students at the end of teaching and learning process. The result of the research shows that the lesson that was implemented in learning Newton Law built students- creative disposition. It is show on the result of creative dispositions questionnaire which has total average of 75.58%. Meanwhile, the lesson that was implemented in learning Newton Law built students- creativity in making the creative product. It shown on the result of a creative product that made which scored using Creative Measurement Tools (CMeT) and has total average about 73%. Students- creative disposition in learning newton law can build students- creativity in making the creative product. It can be proved by the result of correlation analysis using SPSS which is 0.593 that significant at the 0.05 level. Moreover, this research suggests the teachers to always make the lesson which is not only able to build students- creativity but students- creative disposition as well in another learning topics.

Keywords
Creative Disposition, Students- Creativity, Newtons Law, Descriptive Research

Topic
Integrated Science Education

Link: https://ifory.id/abstract/QfEXNdrHYL76

Corresponding Author
Ratna Widyati

Institutions
Universitas Negeri Jakarta

Abstract
Taman Baca Rakyat is one of the institutions in the midst of the community that supports efforts to foster interest in reading. Taman Bacaan Rakyat (TBR) is a means or institution of cultural fondness for reading communities that provide services of reading material in the form of: books, magazines, tabloids, newspapers, comics, and other multimedia materials. The research carried out is still in the initiation stage, namely making a database design and prototype from Taman Baca Rakyat. Data collection techniques through literature study, interviews and observations. The results obtained are database prototype Taman Baca Rakyat.

Keywords
Taman Baca Rakyat, Prototype

Topic
Computer Science

Link: https://ifory.id/abstract/8Ndjuh6AF9Hy

Corresponding Author
Nunu Nurhayati

Institutions
1*)Departemen Pendidikan Matematika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
2)Departemen Pendidikan Matematika, Universitas Kuningan, Jl. Cut Nyak Dhien No. 36 A, Cijoho, Kec. Kuningan, Kabupaten Kuningan, Jawa Barat 45513, Indonesia

Abstract
The aim of this study is to analyze the influence of collaborative problem solving on the enhancement of mathematical proportional reasoning ability. The problems underlying this study include the proportional reasoning ability of students is still low so innovation in learning that can develop students proportional reasoning abilities. The method used is quasi-experiment with non-equivalent control group design. The sampling technique is purposive sampling. This study was conducted at Junior High School and the subjects of this study were 58 students of SMPN 3 Kuningan, 28 students in the experimental class and 30 students in the control class. Instruments which is used are pretest, posttest and observation sheet. Data analysis was conducted by using SPSS 16 software. Data analysis was carried out quantitatively. Quantitative analysis was performed by calculating the N-gain using the normality test, and t-test. Research results of this study are (1) The enhancement of mathematical proportional reasoning ability of students who received collaborative problem solving is better than students who received conventional learning, (2) There is difference of mathematical proportional reasoning ability of students who received collaborative problem solving and students who received conventional learning, (3) The average of n-gain proportional reasoning ability are 0.33 in the experimental class and 0.22 in the control class.

Keywords
Collaborative Problem Solving, Proportional Reasoning Ability

Topic
Mathematics Education

Link: https://ifory.id/abstract/Z8zAJbCFajUX

Corresponding Author
Muhamad Nursalman

Institutions
Department of Computer Science Education, Faculty of Math and Science Education, Universitas Pendidikan Indonesia

Abstract
Efficient multiplier in Finite Field is needed in its implementation in the cryptography field. The NAIK algorithm provides fast steps and efficient solutions in forming the desired multiplier. The formation of an efficient multiplier GF(2^8) will be formed with the NAYK algorithm without being constructed from the smallest values, but directly from the value 8 itself. In comparison with the results of the Generalization of Karatsuba Algorithm, the NAYK algorithm provides a more efficient solution.

Keywords
Efficient multiplier, Finite Field, GF(2^8), NAYK Algorithm, Generalization of Karatsuba Algorithm

Topic
Computer Science

Link: https://ifory.id/abstract/46QUhMwjBYGq

Corresponding Author
Setiya Utari

Institutions
Universitas Pendidikan Indonesia

Abstract
This research aims to design the inquiry based laboratory as well as the cook book laboratory model to train student-s high order thinking. The investigation will train how scientists invented a standard prototype of length, time, and mass through inquiry activity approach. The model is a part of experiment assessment models under revised 2013 Indonesia curriculum. The model was successfully applied to K-10 in a Senior High School. The result shows that the best attainment of model is very high with (0.90) item validity as much as its reliability, good (0.50) discrimination power, and medium (0.62) difficulty index. Average students achieve 74% of experiment process test including investigating problems, tools, method, procedure, data, analysis, and conclusion. We have found that students can elaborate their fact and theory in order to synthesize, generalize, explain, hypothesize, or reach some conclusion or interpretation through applying inquiry based laboratory and training their high order thinking skills

Keywords
Inquiry based Laboratory, Cookbook based Laboratory, High order thinking

Topic
Physics Education

Link: https://ifory.id/abstract/6NEkTBH48UFL

Corresponding Author
Setiya Utari

Institutions
Universitas Pendidikan Indonesia

Abstract
This paper is aimed to design and to implement a new inquiry based laboratory model and cookbook experiment model on a simple concave eyeglasses experiment in Indonesia. The model is a part of experiment models contributing to developing standardization of national experiment examination through revised 2013 curriculum framework. The model has been successfully applied to K-11 in a Private Senior High School. The best achievement of the model is very high with (0.92) item validity as much as its reliability, good (0.50) discrimination power, and medium (0.64) difficulty index. Average student can achieve 72% of experiment process test including finding problems, tools, method, procedure, data, analysis, and conclusion. We concluded that several competences can be trained by using inquiry based laboratory experiment, including understanding experimental problem, determining experimental tools needed, choosing an appropriate method, composing the experiment procedure, collecting data, analyzing data, and writing conclusion.

Keywords
Inquiry based Laboratory, Cookbook based Laboratory

Topic
Physics Education

Link: https://ifory.id/abstract/PAYK9nMXx4JE

Corresponding Author
Setiya Utari

Institutions
Universitas Pendidikan Indonesia

Abstract
Nowadays, 21st-century skill is being considered as one of the educational policies in some developed countries to be well-trained at schools. The science, technology, engineering, and mathematics education (STEM) provides a high opportunity in exercising this skill to students. According to the national Indonesian curricula, it can be found that the students commonly must follow many subjects of course scheduled by a public school with relatively-difficult content. Based on our investigation, the difficulties might be handled by applying the engineering course model. The class can be conducted separately as an independent subject such as the basic technology education, which is provided as a special subject in a private school, or an extracurricular activity of students- science forum for whom interested to this subject. To facilitate a well-scientific activity, the model of engineering curricula is needed especially to train the 21th-century skill. Thus, this work has reported the survey of STEM education activities implemented at some middle schools, the interviews to some teachers who are responsible to the science subject, and the analysis of science subject contents in Indonesian curricula 2013 for the middle school level.

Keywords
The 21th-century skill, STEM education, Curriculum, Engineering course

Topic
Physics Education

Link: https://ifory.id/abstract/2wTnG6y4JaVd

Corresponding Author
Fariani Hermin Indiyah

Institutions
Universitas Negeri Jakarta

Abstract
The lecture evaluation application is one solution for the management of the study program administration. This application system is able to store and process academic data systematically from year to year, with the support of computer technology and software provided. Evaluation trends from year to year in each study program, faculty, or overall with high complexity can also be done.

Keywords
lecture evaluation application, evaluation trends

Topic
Computer Science

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

Corresponding Author
Erman Erman

Institutions
(a) Science Education Department, FMIPA, Universitas Negeri Surabaya

(b) Science Education, Universitas Islam Negeri Sunan Ampel Surabaya

Abstract
Abstract This study aims to predict science teachers- familiarity on high order thinking skills (hot). As many as 44 members of science teacher community in a district in East Java volunteered to participate in this study. Data were collected using some common keywords in science learning in the form of multiple choice test and questioner, and analyzed descriptively using content analysis. The results showed that: 1) more than half of teachers are not familiar with hot, although they have often heard the terms, 2) conceptually, less than 50% of teachers are familiar with the type of hot skills, but are quite familiar with its application in learning, and 3) teachers are quite familiar with terms related hot in classroom, but are still have difficulty explaining the learning that stimulates hot among student. To train student to think hot, it is not sufficient to just be familiar with the term but must understand and able to operate it sustainably and consistently.

Keywords
common keywords, hot familiarity, science teacher

Topic
Integrated Science Education

Link: https://ifory.id/abstract/RBMrGhtJkbx8

Corresponding Author
Deni Cendrianto

Institutions
a) Student of Biology Study Program, Graduate School, Indonesia Education University, St. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
denicendrianto[at]upi.edu
b)Department of Biology Education, Indonesia Education University, St. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
This preliminary research aim to give description about students perception towards biology learning activities based on information and communication technology. This research used quantitative survey research method with deep explanation. The data collection used questionnaire and interview. The statements in the questionnaire were open and close statements, which showed positive and negative perception with 4 point Likert scales. Numeric indices of appreciation of biology learning activities based on information and communication technology were determined using questionnaire information from 58 students in tenth grade. The result show that out of 58 respondents, most of the express positive perception towards biology learning activities based on information and communication technology. The students positive perception towards biology learning activities based on information and communication technology activity implies can made them become more active in learning, most students said they didnt like learning that only listened to lectures from teachers, they preferred learning activities that involved them actively in learning and that the use of gadgets in learning made them more active in learning. Based on the survey results (56.9%) students do not feel difficulties in using ICT when learning biology, this is because they are digital natives who are used to using digital equipment.

Keywords
students; information and communication technology; biology education

Topic
Biology Education

Link: https://ifory.id/abstract/g7qrHb8F4dta

Corresponding Author
Fahyuddin Fahyuddin

Institutions
(a) Department of Chemistry Education, Halu Oleo University, Kendari
*fahyuddinm[at]yahoo.com
(b)Provincial Department of Education, Southeast Sulawesi

Abstract
There is a large body of research on the effectiveness of Inquiry based learning over traditional methods. Less has been reported in the science education literature of study that investigated the different levels of inquiry on students- achievement. This study compared between guided and structured-inquiry based learning on the development of high school students- critical thinking skills related to buffer concepts. A quasi-experimental design was used in this study. Students from two schools in Kendari city participated (N = 92, grade 11). Two classes in each school were randomly assigned to either the guided-inquiry or the structured-inquiry based learning. The critical thinking skills test was administered to both groups, prior to the intervention, and than after the intervention. Descriptive statistics and Analysis of Covariance (ANCOVA) were used to analyze the data collected. The results indicated that the level of guided-inquiry learning caused a significantly better acquisition of critical thinking skills related to buffer concept than the structured-inquiry designed. In addition, students- previous logical thinking skills made a significant contribution to the critical thinking skills related to buffer concepts

Keywords
Guided inquiry; Structured inquiry; Critical thinking skills; Buffer concepts; Logical thinking skills

Topic
Chemistry Education

Link: https://ifory.id/abstract/hvQrqBkwV2nF

Corresponding Author
Siti Saadah Mulyani

Institutions
a) Departemen Pendidikan IPA, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
*) sitisaadahmulyani[at]gmail.com
b) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia
c) Departemen Pendidikan Biologi, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia

Abstract
Science is not only about concepts have been learning but also about moral values that very close with everyday life. Moral values on science learning should have can be applied in life. It will help the student for developing their good character. Character education is necessary to produce good generation. Character education can be integrated on science learning through teaching materials will be given. Teaching materials development can be done by using Four Steps Teaching Material Development (4S TMD) that consist of four stages, namely Selection, Structuring, Characterization, and Didactic Reduction. This article will describe how to develop integrated science teaching materials by using Four Steps Teaching Material Development (4S TMD). 4S TMD method is used because it has a didactic reduction stage where the level of difficulty of teaching materials is reduced according to the intellectual level and cognitive development of students. Besides, this teaching materials be contained moral values was integrated. Therefore, it is expected that students can develop their good character through teaching materials developed.

Keywords
teaching materials, 4S TMD, integrated science, character education

Topic
Integrated Science Education

Link: https://ifory.id/abstract/zf9bAG2tYCWw

Corresponding Author
John Bosco Niyomukiza

Institutions
a, c) University of Rwanda; Civil, Environmental and Geomatics Engineering; Kigali, Rwanda
*nikuzemariejoselyne[at]yahoo.fr
b) Diponegoro University, Faculty of Engineering, Department of Civil Engineering

Abstract
Wastewater is the liquid waste generated after being used for different purposes. It has a great impact on the environment when discharged untreated or partially treated. The poor management of wastewater at Gacuriro wastewater plant leads to the discharge of subsequently untreated and partially treated wastes. Therefore, the research focused on the assessment of the efficiency of Gacuriro wastewater treatment plant. Samples of wastewater were collected at the inlet and outlet of the treatment plant for laboratory analysis. Parameters tested include pH, Temperature, Total Suspended Solids (TSS), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Coliform (TC), Oil and Grease, and Total Phosphorus (TP). Inlet and outlet results are 112.5-364.5 mg/l, 60-190.2 mg/l for BOD; 447-820 mg/l, 46.6-300 mg/l for COD, 19-24 mg/l, 12-18 mg/l for TSS; 6.8-9.05 mg/l, 6.4-5.75 mg/l for TP, 2419.6-50000 counts/100 ml, 1730-30000 counts/100 ml for TC, and 1.012-1.079 mg/l ,0.75-0.923 mg/l for Oil and Grease. Their percentage reduction of efficiency were in the range of TSS (62.50-75%), COD (63.05-78.74%), BOD5 (69.97-83.70%), Oil and Grease (48.67-62.19%), TP (49.26-60.82%), TC (57.14-64.00%) while average inflow and outflow discharge are 2.5 l/s and 1.5 l/s, respectively. The effluent from the treatment plant needs improvement in disinfection systems to remove bacteria out of discharged effluent.

Keywords
Water supply; Wastewater; Efficiency; Gacuriro; Vision city

Topic
Environmental Technology

Link: https://ifory.id/abstract/aPmpBtY48WLh

Corresponding Author
Wiharyanto Oktiawan

Institutions
(1,2)Departement Environmental Engineering, Faculty of Engineering, Diponegoro University, (3) Student in Master of Environmental Engineering, Institut Teknologi Sepuluh Nopember

Abstract
Leachate are dominantly recalcitrant organic pollutants, and thus before its discharge to the environment, leachate must be treated. In this study, electrochemical processes, using aluminum and iron electrode in electrocoagulation, were used to remove non-biodegradable compounds in leachate. The electrocoagulation was conducted as main treatment at flow rate 20 ml/minutes and 40 ml/minutes and constant volatage of 5 volt, and 10 volt. The results showed that aluminum electrocoagulation was effective to remove organic pollutant (measured as COD) 54,08% (2,5 g) using 10 volt and flow rate 20 ml/minutes, respectively, while maintaining its initial pH condition at 5,7-6,6. applied voltage 20 ml/minutes using iron electrode provides results 33,7% (1,9 g) removal of COD, by using Fe electrode provides increasing pH 6,0 to 9,1. This implies that higher voltage and minimum flow rate at aluminum and iron electrode was likely to affect higher COD removal than minimum voltage and higher flow rate. Overall, electrocoagulation processes can be used as alternative method for the removal of recalcitrant organic pollutants of leachate in Jatibarang landfill Semarang City.

Keywords
electrochemical; electrocoagulation; electrode; flowrate; leachate; recalcitrant

Topic
Environmental Technology

Link: https://ifory.id/abstract/ZVzU468Wk7Re

Corresponding Author
Ririh Prayogi

Institutions
Diponegoro University

Abstract
Background: Work-related fatigue is one of occupational health and safety problems that can be a risk factor for work-related accidents. ILO has recorded that every year, two million workers died because of work-related fatigue. There are many factors contributing to work-related fatigue, among others, age, sex, work load, work environment, and Carbon Monoxide exposure. The aim of the research was to observe the effect of Carbon Monoxide exposure and the characteristics of workers to work-related fatigue in workers in Fish Smoking Center, Wonosari Village, Demak Regency. Method: The research used cross sectional design using 42 samples. The data were analyzed using Multinomial Logistic Regression conducted on SPSS. Result: The research shows that 61.9% respondents experience work-related fatigue. Bivariate analysis suggests that age and sex aren-t significantly related to work-related fatigue, while employment period, work load and Carbon Monoxide exposure are significantly related to work-related fatigue. The result of multivariate analysis shows that work load (p=0,009) and Carbon Monoxide exposure (p=0,034) are significantly related to work-related fatigue. Work load is the dominant variable for work-related fatigue. Workers having heavy work load are exposed to work-related fatigue 12 times higher compared to those with light work load. Conclusion: The management of fish smoking center is expected to provide appropriate break and require the workers to wear mask during working hours.

Keywords
work-related fatigue, age, sex, employment period, work load, carboxyhemoglobin

Topic
Environment, Health, and Safety

Link: https://ifory.id/abstract/H8gXNfwa3AM7

Corresponding Author
I Putu Dody Lesmana

Institutions
Politeknik Negeri Jember

Abstract
The aim of this article is to design a waste management model for Gambirono sub-district, Jember based on integrated organic and solid waste management system. The increasing organic and solid waster generation in the sub-district of Gambirono is evidenced by increased number of illegal dumping of waste in the rural communities. In this article, a model that identifies recycling processing that generates additional income to manage organic and solid waste and also incorporating the key performance indicators or metrics for organic and solid waste management services has been designed. The design shows a clear depiction of the environmental management acts and the municipality by-laws. Performance measurement which is very critical in waste management has been incorporated. Model design focus was on separation of types of waste, collection, waste treatment, disposal methods of useless waste and waste bank management have therefore been depicted in the model. The model provides easy access to data for the formation and implementation of effective organic and solid waste management policies, strategies and programs to achieve sustainable waste management.

Keywords
Environment, integrated waste management, organic waste, solid waste, waste bank management

Topic
Others (Related to food and agriculture)

Link: https://ifory.id/abstract/m2RzcF4ud3wn

Corresponding Author
Desyta Ulfiana

Institutions
(a) Civil Engineering Department, Engineering Faculty, Diponegoro University, Semarang, Indonesia
*desyta[at]live.undip.ac.id

Abstract
The increasing sedimentation of Mrica reservoir shows that the sedimentation control has not been effective. The sedimentation control have been made include the disposal of sediments that settle in the reservoir by dredging or flushing. However, the results are not optimal. This is caused by the large volume of sediment entering the reservoir each year. Controlling volume of sediment that goes into the reservoir have also been carried out by conducting a watershed conservation program and building checkdam in the upstream Mrica reservoir. However, the existing checkdam is still less effective in controlling sediments, especially suspended load sediments, that are transported in the river. Therefore this study was carried out by adopting the sediment trap concept to deposit sediments that escaped from checkdam. This study simulated changes in the width of the downstream channel of checkdam by three variations using HEC-RAS. There were width of 20%, 40% and 60% wider than initial width. The results showed the effect of changing the channel width on sediment concentration and volume sediment deposited. Based on the results of the study, the change in width to wider than the initial width could increase volume sediment deposited and decrease sediment concentration.

Keywords
checkdam, sediment trap, suspended sediment

Topic
Sustainable Development

Link: https://ifory.id/abstract/PXmvb6AVD2Lh

Corresponding Author
Edi Siswadi

Institutions
1 Department of Agricultural Production, State Polytechnic of Jember, Mastrip Street 164 Jember, 68121, Indonesia
2 Department of Agribusiness Management, State Polytechnic of Jember, Mastrip Street 164 Jember, 68121, Indonesia

Abstract
Induction of garlic flowering can be done by vernalizing the seed tubers to trigger flowering. This study aims to determine the hormone status of IAA, GA3, at the time of initial growth of leaf tissue, after going through vernalization. Bulbs of Indonesian local varieties of Lumbu Kuning and Tawangmanu varieties were vernalized for 4 weeks, 8 weeks, and without vernalization treatment as a control. The contents of IAA and GA hormones in the leaf tissue of garlic plants aged 2 weeks were analyzed using method high performance liquid chromatography (HPLC). The results showed that the Lumbu Hijau variety with 4 weeks vernalization contained IAA of 1615,595 ng / g; GA3 is 7.297 ng / g. At 8 weeks vernalization the IAA content is 2169,475 ng / g; GA3 of 9,757 ng / g; In the Tawangmanu variety with 4 weeks vernalization containing IAA of 1459,168 ng / g; GA3 is 6.617 µg / g. Whereas for 8 weeks vernalization of IAA content of 2007,195 ng / g; GA3 is 8.315 ng / g.

Keywords
Garlic, Vernalization, IAA dan GA

Topic
Agriculture Engineering and Biotechnology

Link: https://ifory.id/abstract/Fw6c3kRhQDAp

Corresponding Author
Jehan Noor Auda

Institutions
School of Environmental Science, Post Graduate University of Indonesia, Central Jakarta, Indonesia

Abstract
Waste minimization and energy use, synergistic relationship between the community and tenants are important elements of the industrial estate. Various kinds of economic and social in the industrial area will certainly affect and change environmental conditions. Environmental carrying capacity is one of the important components to obtain great support. This study aims to analyze the carrying capacity of the Cikupa Mas industrial estate, Tangerang Regency which is carried out by looking at two main elements, land and water carrying capacity at the location. The selection of research locations is based on industrial activities and the scale of industrial estate, so that it can be a representation of environmental carrying capacity in the Cikupa District, Tangerang Regency. The results of the analysis, indicate the land carrying capacity according to geography, topography, soil type and hydrology conditions that are very suitable for industrial zones. Meanwhile, water carrying capacity was deficit, water availability could not afford the needs of the industrial estate. Regulations that are in accordance with the principles of environmental sustainability, good supervision and implementation, become an external component that can help maintain the environmental carrying capacity.

Keywords
Industrial Estate, Environmental Carrying Capacity, Land Carrying Capacity, Water Carrying Capacity

Topic
Sustainable Development

Link: https://ifory.id/abstract/gRKw62HMtpYe

Corresponding Author
Khafidurrohman Agustianto

Institutions
Politeknik Negeri Jember

Abstract
Coral reefs are typical ecosystems with underwater beauty. In addition to beauty, there is a function to reduce abrasion, marine biota residence and as well as educational facilities. The current state of coral reef ecosystems in Indonesia is quite alarming, the condition of coral reefs that are in very good condition is 6.39%, good condition is 23.40%, sufficient condition is 35.06% and bad condition is 35.15%. So there needs to be special handling to deal with these damage by using technological developments. Based on these conditions many researches emerged for observation and conservation. One of them is research on the development of conservation aids, the floating of these tools is accompanied by the development of increasingly natural ways of user interaction and tools. Natural interaction is characterized by interactions that transform human movements into direct digital action. Motion Tracking (MT) is one of the implementations of markerless/natural interaction, in which to identify projects is no longer based on certain symbols. MT reads body parts then converted into digital movements. This study aims to develop Real-Time Motion Autonomous Surface Vehicle (ASV) Controlling for Coral Reef Conservation and Fisheries using Fuzzy Algorithms. The tools produced by the study are controlled naturally, so it is expected to facilitate users in operating ASV. This tool is expected to facilitate monitoring and observation for the conservation of marine ecosystems (coral reefs and fisheries).

Keywords
Coral Reef Conservation and Fisheries, Autonomous Surface Vehicle, Real-Time Motion Controlling

Topic
IT for Agriculture

Link: https://ifory.id/abstract/ApPFDG9ktq3Z

Corresponding Author
Eflita Yohana

Institutions
(a) Department of Mechanical Engineering, Engineering Faculty, Diponegoro University
Jalan Prof. H. Soedarto, S.H., Tembalang, Kota Semarang, Jawa Tengah 50275
*Email: efnan2003[at]gmail.com

Abstract
The utilization of wind energy in Indonesia is still low because the average wind speed in Indonesia is low. The design of the HAWT using a NACA airfoil which has a high C / Cd value and produces 500 W of power at wind speeds of 1 m/s up to 11 m/s. The research was conducted in 3 stages. First, the calculation stage to determine the radius, chord and twist of the blade. Second, the initial design stage of the blades is simulated to determine the NACA airfoil that is used and to know the coefficient of performance and power produced. Third, the stage of designing the 3D blade design. The design results show that the HAWT blades with NACA 5513 airfoil taperless type with radius of 0.9 m on the airfoil simulation produced a higher Cl / Cd value with 152.73 when α = 4 °. In the Cp simulation for TSR, the Cp value reaches 20% in TSR 2 up to 10. Meanwhile, in the power wind speed (P - v) simulation, the power generated reaches 500 W at wind speeds of 11 m/s and angular velocity 263 up to 1000 rpm.

Keywords
Blade Design; Taperless; NACA 5513; Wind Turbine

Topic
Energy Conservation and Efficiency

Link: https://ifory.id/abstract/qvN9JXya34gf