Indonesia Conference Directory

Corresponding Author
Rifka Annisa Girsang

Institutions
Physics Education, Post Graduate, Universitas Negeri Medan
Jalan Willem, Medan, Indonesia

Abstract
The study aims to develop Two-tier Multiple Choice (TTMC) test to measure students Higher Order Thinking Skills (HOTS) in material Momentum and Impulse to standard qualifications of good test based in validity, reliability, difficulty index, discrimination index and effectiveness distractor. The type of research is developmental research, using the ADDIE model. The data analysis technique used is qualitative and quantitative technique. The results of this study based on qualitative analysis showed that quality of the test questions was very good with a percentage of validity of 91,33%. Quantitative analysis of the quality of the TTMC test is good. Analysis of 27 items in the small group trials showed test obtained 24 items received and 3 items were rejected. The large group test was obtained: (1) 19 valid items (71%), 5 invalid items (21%). (2) The test having enough reliability is 0.587. (3) 3 (13%) easy items, 12 (50%) medium items and 9 (38%) difficult items. (4) Discrimination index of the questions was obtained by 14 (58%) questions in the excellent category, 5 (21%) questions in the good category and 5 (21%) questions in the bad category. (5) 19 (79%) were effective items and 5 (21%) were ineffective items. Items received were 12 (50%) questions, 7 (29%) items revised and 5 (21%) items rejected.

Keywords
Development, Two-tier Multiple Choice, Validity, Reliability

Topic
Curriculum, Research and Development

Link: https://ifory.id/abstract/aZ3bXRA4YdFN

Corresponding Author
Dimyati Dimyati

Institutions
Graduate School, Universitas Negeri Yogyakarta
Jl. Colombo No. 1, Sleman, Yogyakarta, 55281
Indonesia

Abstract
The purpose of this study is to determine the effect of journal writing training on the attitudes and self efficacy of Postgraduate Masters (PPs) students at Yogyakarta State University (UNY) in writing scientific publications in the form of journal articles as a graduation requirement. The method used to achieve the objectives of this research is restrospective causal-comparative design or ex-post facto research (Gay and Airasian, 2011). The population in this study were students of the UNY Postgraduate Masters program. The sampling technique used was cluster random sampling, with 304 students from 14 Study Programs. Self-efficacy instruments with reliability (0.802) and validity (0.320 - 0.712), while the attitude instruments with reliability (0.895) and validity (0.248 - 0.843). The data analysis technique uses Regression followed by Anova. The results of the study showed that: (1) participation in journal writing training significantly affected the attitudes and facilitation of the students of the Postgraduate Program of the UNY Postgraduate Program that they were able to write scientific publications in the form of Journal articles as graduation requirements. Even being able to contribute effectively reaches 35%. However, the positive attitude of the students of the Postgraduate Program at UNY did not affect their ability to write journals as a graduation requirement.

Keywords
Attitude; Self efficacy; Training in journal writing; Students

Topic
Education and Research Global Issue

Link: https://ifory.id/abstract/4ENB2KaVRFMh

Corresponding Author
Elni Jeini Usoh

Institutions
a) Universitas Negeri Manado
Pasca Sarjana
Program Studi: Manajemen Pendidikan
*Email: elni.usoh[at]unima.ac.id

b) Universitas Negeri Manado
Fakultas Bahasa dan Seni

Abstract
There has been a tendency in most schools to become increasingly aware of their image in the community. The school principals are realising the need to work positively with community to ensure a good image of the school. It is conceivable that the leadership of the principal plays a significant role in promoting a positive image of the school. The aim of the study is to examine the importance of projecting a good image of a school and roles of the principal to accomplish this objective. This study utilised qualitative descriptive method. The data collected from observations, reports, literature, and documents. The results show that promoting a positive image for school, as a market-oriented activity, requires the principal to exercise highly-developed public relation skills. They need to have more interaction with the external community to promote the school, attract students as well as retain them. The study concludes that promoting a positive school image is a business-like effort in which school management should adapt some marketing approaches. Principal-s role is a pivotal point in projecting a good image. The leadership of the principal is a key factor in gauging public opinion that contributes to the image of the school.

Keywords
school image; school promotion; principal.

Topic
Global Issues in Education and Research

Link: https://ifory.id/abstract/ghkC3ZFmt6bV

Corresponding Author
Elni Jeini Usoh

Institutions
Universitas Negeri Manado
Pasca Sarjana
Program Studi Manajemen Pendidikan

*Email: hennytambingon[at]unima.ac.id
elni.usoh[at]unima.ac.id

Abstract
Teacher performance can be enhanced if the principal is able to carry out his managerial functions and improve learning facilities. Teacher performance is closely related to creativity, discipline and teaching-learning activities which should be supported with good quality of facilities. This research aims to describe and analyze: the influence of principal-s managerial competence and learning facilities towards teacher performance at vocational high school in Manado, North Sulawesi, Indonesia. Quantitative approach used as survey method. The questionnaires were distributed to 97 teachers as population of tourism study program, with 49 teachers responded. The questionnaire used Likert scale which measured with multiple correlation analysis. The results of show that: the influence of principal-s managerial competence towards teacher performance at 22,7%; the influence of learning facilities towards teacher performance at 51,6%, the influence of principal-s managerial competence, and learning facilities simultaneously towards teacher performance at 51,6%. It can be concluded that: the principal-s managerial competencies should be improved so the professional school managerial system can be reformed, good quality of learning facilities to improve the learning process. The regional education department should synergies with the school program in improving competencies through education and training, improvement of academic qualifications, and upgrade the learning facilities.

Keywords
managerial competence, learning facilities, teacher performance.

Topic
Course Management

Link: https://ifory.id/abstract/nptLz7JHEkDe

Corresponding Author
Indah Khoerunnisa

Institutions
Study Program of Technology and Vocational Education, Post-Graduate School, Universitas Pendidikan Indonesia, No. 207, Dr. Setiabudhi Street, Bandung 40154, Indonesia

Abstract
Reduced employment due to the rapid development of technology requires responsive vocational education in adjusting the required competency of graduates. Collaboration between vocational and industrial schools in the form of link and match is the right solution. This research was conducted to describe the availability of Agro-industry vocational schools with relevant food industries based on the regional potential to reduce the gap in graduate competency. The method used is descriptive qualitative. 47 Agro-industry vocational schools spread in 14 regencies in West Java. Around 120 food industries that are relevant to vocational competence are spread in 15 districts.. The low percentage of availability of Agro-industry vocational schools and the food industry is not aligned with the potential of the region that has been established. The availability of vocational schools and relevant industries based on location provides opportunities for vocational schools to collaborate and implement link and match programs. Synchronization of the expertise areas of vocational schools with superior potential areas in each province needs to be identified

Keywords
Link and match, Vocational School, School Mapping, Agro-industry

Topic
Other Areas of Education

Link: https://ifory.id/abstract/qkK7dtXehfPH

Corresponding Author
Meitij Rampe

Institutions
Postgraduate Program, Manado State University, Indonesia

Abstract
This study aims to produce teaching materials using a scientific approach to improve student learning outcomes in static electricity material. This study refers to Research and Development research following the stages of implementation according to Borg and Gall. The trial subjects consisted of theoretical trials and empirical trials. Theoretical trials consist of expert design teaching materials and experts in learning materials in the field of science. The empirical trial consisted of 10 small groups and 30 large groups. The instruments used were interviews, questionnaires, and test results. The data obtained were analyzed descriptively and used the Analyze Compare Means analysis with α = 0.05. The results of the validation of teaching materials expert products are included in the very strong category with a value of 91% and the results of the validation of learning materials are included in the very strong category with a value of 93%. The results of the field test analysis show that teaching material products with a scientific approach are well used in the learning process in the classroom that can improve student learning outcomes.

Keywords
teaching materials, scientific approach, learning outcomes

Topic
Learning / Teaching Methodologies and Assessment

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

Corresponding Author
Veti Rizky Tosiyana

Institutions
a. Biology Education Department, Faculty of Teacher Training and Education, Universitas Muhammadiyah Malang

*Corresponding author: usya_bio[at]umm.ac.id

Abstract
Research on the study of the diversity of mollusks in the mangrove forest area of Cengkrong Beach – Trenggalek has an important role in knowing the decline in the ecological function of mangrove forests due to exploitation. Exploitation that occurs is illegal logging of mangrove trees. The purpose of this study was to analyze environmental conditions through physico-chemical parameters, analyze the diversity of mollusks, and analyze the relationship between environmental conditions and the diversity of mollusks in the mangrove forest of Cengkrong Beach - Trenggalek. Sampling was carried out at three stations with 27 plots. Sampling using purposive sampling technique with the belt transect method then measures environmental conditions. Data analysis using regression test. The results showed that the conditions of pH, temperature, salinity were normal. The diversity of mollusks found was 13 species consisting of 11 species from the Gastropoda class and 2 species from the Bivalvia class. Furthermore, there is a significant relationship between environmental conditions and the diversity of mollusks.

Keywords
Diversity; mangrove forest; mollusks

Topic
Zoology

Link: https://ifory.id/abstract/NB8fkcMxt2wj

Corresponding Author
AMAN SANTOSO

Institutions
Universitas Negeri Malang

Abstract
Acidification and coagulation are important processes in making cheese from cows milk. The concentration of starter and liquid rennet affects the characteristics of the cheese. The purpose of the study was to determine the effect of the concentration of starter and rennet on cheese from good quality and determine the yield value, moisture content, protein content, and organoleptic cheese test. Variations in starter concentrations of 1%, 2%, and 3% while variations in rennet concentrations were 0.010%; 0.025%; and 0.040%. The results of ANOVA and Kruskal-Wallis test showed that starter and rennet concentrations affect color, texture, and protein content while rennet concentration only affects water content (P <0.05). The yield of cheese, flavor and arom was less affected (P> 0.05). This study used Mann-Whitney to analyze the data. The result showed that the chesee produced has a soft texture, yellowish white color, typical aroma of cheese, and a typical salty cheese flavor. The yield of cheese, water content, and protein content in this study were 13.46-19.19%, 50.87-66.05%, and 3.86-9.73%.

Keywords
chesse, starter, rennet, coagulation, acidification

Topic
Biochemistry

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

Corresponding Author
Retty Ratnawati

Institutions
1) Faculty of Medicine, Universitas Brawijaya, Malang
2) Dept. of Chemistry, Faculty of Science, Institute Technology Bandung

Abstract
Brain injury caused by physical trauma in our TBI (trauma brain injury) rat model, have been approved to recover after administered by total catechins derived from green tea. The improvement have been detected in the increase of the neurological severity score (NSS). While in the molecular level, the improvement could be detected through the decrease of TNF alpha, caspase 8, caspase 3, NFKappa B p65 and also the increase of the BDNF and ratio BCl2/Bax. Hyperglycemia could damage the brain that can be seen in our memory spatial rat model. The administered of the total anthocyanin derived from sweet purple potatoes Ipomoea batatas L. kultivar Gunung Kawi, was used to these animals to improve the memory spatial of the rat. It can be determined through the molecular level, such as the decrease of the MDA, Caspase 3, TNF alpha and also the decrease of the travel time Morris water maze However there is still problems to decide the exact rationale doses of these two natural anti-oxidant. Therefore, it is a deemed to continue to elaborate the doses.

Keywords
trauma brain injury, memory spatial, total catechins, total anthocyanin sweet potato

Topic
Biomedical Science

Link: https://ifory.id/abstract/xFjMWaBQgpE9

Corresponding Author
Fatkhur Rohman

Institutions
a). Automotive Electronic Engineering, Department of Mechanical Engineering, State Polytechnic Malang, Jl. Soekarno Hatta, No. 9, Malang, Indonesia
b). Informatic Engineering, Department of Informatic Engineering, State Polytechnic Malang, Jl. Soekarno Hatta, No. 9, Malang, Indonesia

Abstract
IGBT device was not commonly used as BLDC motor speed controller. This paper described the successful of using IGBTs in 350Watt BLDC motor speed controller. Triple bridge configuration with PWM (Pulse Width Modulation) wave signal for power tuning was mainly integrated as main switching method in order to drive the current commutation cycle. Also, efficient bootstrap IC was designated to perform as high and low side driver. Data results was measured by using current sensor and DC voltage sensor to measure the current and voltage delivered from power source. Then, IGBT device was activated based on triple bridge commutation cycle and phase based on motor hall effect sensor triggering signal. The performance was also tested by varying the duty cycle input ratio and its PWM frequency. The experimental result shows the reliable performance in low, medium and fast RPM. Also, the highest value recorded was 2500 RPM, with 0,9 duty cycle ration and consume 9 A current.

Keywords
BLDC motor speed controller, bootstrap IC, high and low side driver, triple bridge, commutation, duty cycle

Topic
Mechatronics and Robotics Technologies

Link: https://ifory.id/abstract/FNtJhbn9uCpg

Corresponding Author
Syamsul Hadi

Institutions
Department of Mechanical Engineering, State Polytechnic of Malang, Jl. Soekarno-Hatta 9, Malang 65141, Indonesia

Abstract
Fatigue life prediction for engineering material is important for predictive maintenance to support accident prevention in a high-risk equipment. The study aims to determine the ability of the machine prototype of rotating bending type fatigue test and to find out the fatigue life of Nylon and cast iron specimens. By knowing the fatigue life of a plastic and ferrous metal material, the prediction of fatigue life can be applied to a maintenance plan. The design and manufacture of rotating bending fatigue testing machines equipped with copy turning devices can be used to prepare specimens from plastic/soft metal materials, thus becoming an integrated fatigue test machine. The method used includes determining the size of standard fatigue test specimens, turning various fatigue test specimens, carrying out fatigue test specimens of nylon and cast iron materials, and analyzing the results of fatigue tests. The test results of the fatigue test machine prototype showed the ability to turn plastic and soft metal materials, and the fatigue life for Nylon 6.6 ranging from 659 to 13216 rotation at 229 to 26 MPa stresses, and for cast iron from 142 to 22863 rotation at 229 to 147 MPa stresses.

Keywords
fatigue life, Nylon, cast iron, copy turning devices, and rotating bending fatigue testing machines

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/qcdZwb3TFz24

Corresponding Author
Mela Damayanti

Institutions
(a) Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung.
Jl. gegerkalong Hilir, Ds. Ciwaruga. Bandung, 40012. Indonesia.
*simeladamayanti[at]gmail.com

(b) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung.
Jl. gegerkalong Hilir, Ds. Ciwaruga. Bandung, 40012. Indonesia.

(c) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung.
Jl. gegerkalong Hilir, Ds. Ciwaruga. Bandung, 40012. Indonesia.

Abstract
Flood is an important phenomenon which often occurs in cities recently. The Case of this paper is the flood in Dr. Junjunan Roadt which is one of high density roads in Bandung and the main road to Cipularang Toll Road. The floods height is up to 40-50cm, and the average of flood duration is abaout 30 minutes. The rainfall used for counting in this research is a return period approximately 25 years with the rainfall value of 80.1 mm. The solutions for reducing the floods is by increasing the drainage capacity as well as increasing the water infiltration to the ground. The reserach method uses the physical experimental model, using the scale mode of 1:30. The experimental results are tested through validation process using Hecr-RAS 5.0.7. Furthermore for the testing model, a scheme of two drainage streams and one river which leads to Citepus river through Box Culvert is used. The results of the testing model indicate that increasing the drainage capacity along the street is the most effective solution in decreasing the potential of floods, while applying the pourous drainage may also reduce the debit of water run off.

Keywords
Rainfall, cities flood, drainage, infiltration, Hecr-RAS 5.0.7

Topic
Civil Engineering

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

Corresponding Author
VERA CAHYA RINJAYANI

Institutions
(a) Agricultural Engineering Faculty of Agricultural Technology, Brawijaya University, Indonesia
*wijaya.rahmad40[at]yahoo.com
(b)Agroindustrial Technology Faculty of Agricultural Technology, Brawijaya Univesity, Indonesia

Abstract
Composting can be done using conventional methods, but this method has a weakness in terms of time because temperature and humidity are not in optimal values. Aerobic Bioreactor is a design tool for processing rabbit livestock waste into organic compost in aerobic conditions by implementing a DS18B20 temperature sensor and YL69 humidity. The sensor will provide input temperature and humidity to be forwarded to the Fuzzy Logic System control unit. Fuzzy Logic System controller is considered more capable in maintaining temperature and humidity for microorganisms because of the very high level of precision. The resulting output is then channeled to a humidity-enhancing sprayer and blower to reduce temperature and humidity to maintain system stability. Aerobic Bioreactor is equipped with a stirrer to facilitate reversal and aeration during composting compared to fixed bioreactor. The power input used is quite low, so the calculation of profits for rabbit farmers will be higher. It is expected that Aerobic Bioreactor can be a solution in the problem of low profit rabbit breeders.

Keywords
Aerobic, Bioreactor, Compost, Livestock Waste, Rabbit

Topic
Environmental Science and Engineering

Link: https://ifory.id/abstract/wNA6tJ3vfCeY

Corresponding Author
Satworo Adiwidodo

Institutions
Department of Mechanical Engineering, State Polytechnic of Malang, Jl. Soekarno-Hatta No. 9, Malang 65141, Indonesia

Abstract
The conventional Savonious wind turbine has two inverted cylindrical blades that resemble the letter S when viewed axially parallel, it can indeed receive fluid impulses from all horizontal directions and produce a greater drag force than other wind turbines. The weakness of Savonius is the resistance in one blade side. Efforts to improve that has been done is to add a blade that serves to increase the local velocity of fluid flow to resist the resistance which is termed Savonius tandem blade (STB). This research was conducted to further reduce the resistance value of one side STB with the addition of an adjustable deflector. The purpose of this study is to obtain information on changes in the torque of the STB wind turbine on variations in the deflector angle and stream velocity. The research method used is numerical simulation using CFD software. A two-dimensional view of the rotor model using deflector was considered. The deflector angle varies start from 15 degrees with an increase also every 15 degrees until the torque decreased. The CFD simulation show there is a significant increase in torque with the addition of a deflector. Maximum torque is not achieved at one deflector angle value but is also influenced by stream velocity. At higher stream velocity there is a tendency to reach the maximum torque required larger deflector angle. Then at a certain point, the torque will decrease when the deflector angle is enlarged.

Keywords
CFD simulation, wind turbine, adjustable deflector, torque, Savonius tandem blade

Topic
Mechanical Engineering

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

Corresponding Author
Azzumar Utami

Institutions
(a*) Student of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email:
azzumarutami[at]gmail.com
(b) Faculty Staff of Applied Civil Engineering Master Program at State Polytechnic of Bandung. Jl. Gegerkalong Hilir, Ds.Ciwaruga, Bandung 40012. Email: riawan.gunadi[at]gmail.com

Abstract
The steel structure is commonly acknowledged able to return to its original strength condition. It is yet unknown whether composite structure may return to its initial condition. Test specimen on the present study consists of 8 units, each of them divided into four stud-connector bold (SP) composites beams and four UNP connector (SF) composite beams. Each of the specimen has control value by SP/020 and SF/020, and other six specimens with combustion of SP/400, SP/550, SP/700 and SF/400, SF/500, SF/700, within condition of point load for about 12 kN. The study intend to investigate composite girder of post-fire bridge element towards duration and heat temperature factors and effect of beam performance towards stud-connector and UNP connector composites. The results draw several conclusions; (1) the process of composite combustion shows that the failure on composite steel beam specimen is due to the load, burning duration and temperature which results in residual deflection, (2). Deflection test reveals the effect of temperature, load, and duration do not give significant impact to load capacity of post-combustion beam structure. (3) The tensile test on the post-combustion steel. The higher the temperature and the longer the duration, the greater the melting reduction and strain hardening.

Keywords
Combustion; temperature; composite; duration; load

Topic
Civil Engineering

Link: https://ifory.id/abstract/THPYgy3VDQZ8

Corresponding Author
Ridha Amalia Idhar

Institutions
a) Department of Civil Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok 16426, Indonesia
*ridhaamalia.i[at]gmail.com

Abstract
In order to obtain the material properties of reinforcing steel rebar (rebar), tensile test must be performed in the laboratory. Some standards, such as SNI and ASTM, standardize condition of the sample and the loading rate of tensile test. ASTM E8M regulates the loading application (1.15-11.5 MPa/s) of steel rebar test under tension to determine yield properties and SNI 07-2529-1991 regulates 10 MPa/s as the maximum loading rate. These circumstances affect the duration of tensile test in real condition, which may lead to one hour of tensile test. In this article, effect of loading rate of pre-conditioned steel bars (by reducing the section, grinding, and/or lathe according to SNI 07-2529-1991) is investigated using deformed bars (BJTS 40, certified by industries). Random sample of steel reinforcement bars are tested under three different loading rate application. The result of material properties of the rebar, such as stress-strain curve, yield strength, and ultimate strength, are discussed and analysed in this study. Different speed test resulting in different stress rate before yield. However, the stress-strain responses of specimens in the range of linear elastic material are similar. Moreover, at the post yield (plastic) region, the loading rate significantly affected the ductility of the material.

Keywords
Tensile test; Reinforcing steel bar; Loading rate; Yield and ultimate strength; Cup and cone fracture

Topic
Civil Engineering

Link: https://ifory.id/abstract/rFdeBuGx84MV

Corresponding Author
Riza Aulia

Institutions
POLITEKNIK NEGERI BANDUNG

Abstract
Filler is one of the ingredients functioning as a filler of ribs from a paved mixture.. In a flexible pavement structure, the surface layer is the most upper part of the pavement which acts to hold the wheel load and also as a dense layer of water to protect the required road body, with a minimum thickness of 4 cm. This research was conducted by experimental method aiming to know the highest stability value using volcanic ash deposits as a substitute for cement in the filler.The deposits of volcanic ash used are 0%, 25%, 50%, 75% and 100% of the filler weight. The specimen material consists of several types, namely Marshall, PRD, IP, and GMM specimens. Concrete asphalt mixture is designed on the basis of the Marshall method. The results show that the volcanic deposit content is 0% with a stability value of 1133 kg, 15% with 1151 kg stability value, 30% with 1076 kg stability value, 50% with 1056 kg stability balue, 70% with 1048 kg stability value, 85% with 1047 kg stability value and 100% with 1121 kg stability value. From these variations, the highest stability value is found in 15% volcanic ash deposition with 1151kg.

Keywords
Volcanic ash deposits, Filler, Stability

Topic
Civil Engineering

Link: https://ifory.id/abstract/Q862rCgxtZTq

Corresponding Author
ANNISA PUSPA KIRANA

Institutions
State Polytechnic of Malang

Abstract
Agriculture is among the most vulnerable of all sectors to drought. Droughts cause serious effects on the agricultural sector due to its heavy dependence on rainfall. In the present work, we use the Vegetation Health Index (VHI) of MODIS Data as drought indices to monitoring the drought over East Java, Indonesia. VHI is computed based on the vegetation index and land surface temperature which are very important satellite products for drought monitoring with remote sensing. VHI describes vegetation health from the combination of TCI (temperature) and VCI (vegetation condition).

Keywords
agriculture, satellite, monitoring, MODIS, VHI, TCI, VCI

Topic
Environmental Science and Engineering

Link: https://ifory.id/abstract/Vaw47m3e6fp9

Corresponding Author
Kathy Sulistianny

Institutions
a) Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung
*sulistiannykathy[at]gmail.com
b) Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung

Abstract
The Construction of Antapani Flyover has caused traffic congestion. This paper is to find the solution to achieve the queuing standard allowed refering to PKJI 2014. The method of research uses the risk analysis. The analysis is focused on the two critical construction works, namely abutment and bridge wall works. The traffic congestion analysis considers the narrowing road due to construction disruption. The traffic congestion analysis was carried out by comparing the congestion of the existing construction with the construction method proposed. The three proposed alternative solutions are by the increasing road capacity, scheduling construction methods, and a combining solution those two alternatives. The results shows that the best alternative solution to reduce traffic congestion during construction is a combined solution between the increasing road capacity and scheduling construction methods. The result of alternative solution shows the decrease of queue on Terusan Jakarta road reaching up to 90% from the existing condition. The conclusion describes that the narrowing road of work zones of construction has a huge influence on traffic congestion. By this result is suggested to consider the magnitude of disturbance as well as the solution of the traffic congestion that may occured.

Keywords
Traffic Congestion, Queuing Standard, Construction Road, Antapani Flyover.

Topic
Civil Engineering

Link: https://ifory.id/abstract/H4kEKYG6T3Mt

Corresponding Author
Aghnia Darajatun

Institutions
(a) Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung. JL.Gegerkalong Hilir Bandung
(b)Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung. JL.Gegerkalong Hilir Bandung
(c)Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung. JL.Gegerkalong Hilir Bandung

Abstract
Urban floods has become a critical phenomenon recently. These are mostly caused by the fast increase of building growths. The need of mitigation of floods to save road users becomes an important aspect in urban area. This paper is to find a solution the case of flood in Pagarsih Road which was occured at 2016 with standard the rain fall cyclus for 25 years. The characteristic of Pagarsih Road floods are due to the overflow of Citepus River which lays beside the road. A kind of the road infrastructure proposed to solve the problem is a porous reservoir which functioned as the water storage of run off. The method used in this research is a simulation using a physical model as well as the manual calculation using Hec Ras. The model is to simulate the existing condition as well as the proposed solutions. The alternative solution developed is tested by providing several reservoir volumes and also by adding pourous facilities to increase the reservoir capacity. The validation test is carried out by using HECRAS-5.0.7 to achieve a certain reliable solution. The result shows that the reservoir storage capacity is the dominant parameter to mitigate the risk of floods.

Keywords
flood, reservoir, physical model, HEC RAS 5.0.7, capacity.

Topic
Civil Engineering

Link: https://ifory.id/abstract/DFpNybAgZW2V

Corresponding Author
Adam Malik

Institutions
1Pogram Studi Pendidikan Fisika, Universitas Islam Negeri Sunan Gunung Djati Bandung, Jl. A. H Nasution No. 105, Bandung 40614, Indonesia
2Tadris Biologi, IAIN Syekh Nurjati Cirebon, Jl. Perjuangan Sunyaragi, Kesambi, Cirebon 45131, Indonesia
3Tadris Fisika, IAIN Palangka Raya, Jl. G. Obos Islamic Center, Palangka Raya, 73111, Indonesia
4Tadris IPA Fisika, Universitas Islam Negeri Imam Bonjol Padang, Jl. Prof. Mahmud Yunus Lubuk Lintah, Padang 25153, Indonesia
5Jurusan Pendidikan Fisika, Universitas Islam Negeri Alauddin Makassar, Jl. H. M. Yasin Limpo No.36 Samata, Gowa 92111, Indonesia
6Program Studi Pendidikan Fisika, Universitas Bengkulu, Jl. WR. Supratman Kandang Limun, Bengkulu 38371, Indonesia

Abstract
The collaborative is a skill needed in facing challenges and opportunities in the era of industrial revolution 4.0. Therefore, universities must prepare prospective graduates to have collaborative skills. The purpose of this study was to describe collaborative skills that are trained and developed through laboratory activities. This study used descriptive quantitative methods. The research sample amounted to 250 teacher candidates from several Islamic universities in Indonesia. The sampling technique used random sampling, which represents Islamic universities on four islands in Indonesia. The research instrument used was a performance assessment supplemented by a rubric of assessment. The results of research prospective teacher collaboration skills were an as good category. Thus, laboratory activities can train and develop collaborative skill skills of prospective teachers.

Keywords
Collaborative, laboratory activities, elasticity

Topic
Physics Education

Link: https://ifory.id/abstract/jVDxYFyag3KG

Corresponding Author
Sutiah Sutiah

Institutions
(a,c)Faculty of Tarbiyah and Teaching Training Universitas Islam Negeri (UIN) Maulana Malik IbrahimMalang
(b)Informatics Engineering Department
Faculty of Science and Technology Universitas Islam Negeri (UIN) Maulana Malik Ibrahim Malang
(d)Psicology Department
Faculty of Psicology Universitas Islam Negeri (UIN) Maulana Malik IbrahimMalang

Abstract
The research aims to assess the development and implementation of Fuzzy Topsis optimization on core competency detection expert systems and student learning achievement majoring in Islamic religious education at PTKIN. In the learning process of KKNI based curriculum designed to detect the level of development of core competencies and achievements study students at the faculty or PAI study Program at PTKIN. The main product development of this research is expert system application With the Fuzzy Topsis method of measuring the indicator Development of Core Competencies (Hard skills and soft skills) and Learning factors that have an effect on student learning achievements. The results of this expert system can help students and lecturers Independently to detect how the level of development students core complications, detecting internal learning factors and external influences and measures how they influence to student learning achievements. Optimizing Results of Fuzzy TOPSIS shows optimal results with an accuracy rate of 92%.

Keywords
Fuzzy Topsis; Optimization; Indicator Development

Topic
Computer Science and Engineering

Link: https://ifory.id/abstract/HrA6yMkCLBxd

Corresponding Author
Nadia Putri Wijanarko

Institutions
Universitas Indonesia

Abstract
Digital Image Correlation (DIC) is a new, cutting edge technology employed the study full-field displacement of materials- surface concrete applied to hard concrete specimens. DIC uses the help of digital images that was recorded sequentially during testing period. Principally, DIC tracks down pattern imposed on the surface within the sequence of images. There had never been a research conducted using the method in Indonesia using conventional tools. This research proves that such thing is possible. The component and steps to DIC are extensively discussed in the research; speckle pattern, method of record, images produced, and data computation. Through this research, the behavior of how displacement and strain develops when concrete is subjected to compressive testing can be studied. The results of the research were analyzed quantitatively using the digital images and its computation based on computer software used. Additionally, provided that this was a preliminary research, there are many aspects and suggestions found from this research that will be applicable for future researches.

Keywords
Digital Image Correlation, DIC, Concrete, Digital Image, Strain, Displacement

Topic
Civil Engineering

Link: https://ifory.id/abstract/7bHmEZk46pcC

Corresponding Author
Hudiono Hudiono

Institutions
State Polytechnic Of Malang

Abstract
Local water supply company in Indonesia still uses analog water meter, hence the data recording of customer- water usage was carried out by officers manually. It is certainly an inefficient and risky method that could produce errors. Moreover, not all water meter data could be recorded at the time officers come to the location, for example in vacant houses, that could causing customers suffer the consequences such as fine for late payment. In this study, we proposed a new water meter reading system design which contains a conversion device that could convert analog water usage data into the digital one, installed in existing analog meter. The converted data would be transmitted to local concentrator using a 433 MHz wireless transceiver network and sent to the server that acts as monitoring center via cellular networks. The process of digitizing the water meter does not need to be done by replacing the existing analog water meters. Thus, the investment costs of the water meter digitalization process would be relatively cheaper and its could be a solution for increasing the recording efficiency and accuracy of customer-s water usage data.

Keywords
433 MHz transceiver, cellular network, analog water meter, local concentrator, server, Monitoring center.

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/ZGuzveMf4WYr

Corresponding Author
Moch Sayid Assaury

Institutions
a)Student, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung
*limzsevensquad[at]gmail.com
b)Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung
c)Lecturer, Magister Terapan Rekayasa Infrastruktur, Politeknik Negeri Bandung

Abstract
Side frictions along the market area of Tanjungsari often cause traffic congestion during peak hours. The traffic congestions are caused by the high frequency of side frictions decreasing the effectivity of road capacity value. This paper analyse the degree of saturation due to side frictions influencing on traffic congestion as well as providing some effective alternative solutions. The traffic congestion analysis method refers to the PKJI 2014 by considering the level of service standard. The three alternative solutions are simulated by the detouring and widening road as well as combining those alternatives. The solutions are concerned with the level of service standard for 10 years period. The analysis results shows that the most effective alternative solution is a combining solution between road widening and detouring. The other result shows that detour could solve congestion if the width of alternative road equals to the width of previous main road.The result of combining alternative shows that the level of service may achieve the category of "C" complying to the rural road standards. The degree of saturation Bandung-Sumedang segment is 0.51, whereas Sumedang-Bandung segment is 0.74. These solution achieve upto 57% reduction of traffic congestion Bandung-Sumedang section and 52% Sumedang-Bandung section.

Keywords
Traffic congestion, Road Capacity, Degree of Saturation, Side Friction

Topic
Civil Engineering

Link: https://ifory.id/abstract/F8CxtXRkBupK

Corresponding Author
Amalia Eka Rakhmania

Institutions
State Polytechnic of Malang
m.taufik[at]gmail.com

Abstract
Indonesian population has grown rapidly, as shown in Central Statistics Agency report that in 2018, Indonesia-s population reached 265,015,030 million. Along with the increasing number of population, water for daily needs is in high demand. A good monitoring and water management is needed to oversee the water usage efficiently. Currently, local water company still implements postpaid payment system that is time and human resources inefficient. In this study, we proposed the implementation of internet of things (IoT) in designing prepaid water meter card for real time water usage monitoring. The card could also be used to directly purchase water quota online via website. The proposed water meter used air vent valve system combined with the water flow sensor to measure the amount of user-s water usage. Result shows that the proposed system could work properly with the error value of 2.84% measured from the difference between water flow read in conventional water meter with the measured value in our proposed water meter. The purchased quota will be directly deducted based on the amount of measured water usage. These process was done in real time environment and the data will be automatically stored in server. When user is running out of quota, solenoid valve embedded in the proposed water meter system will be automatically closed such that user have no access to water source.

Keywords
Prepaid water meter, water flow, real time

Topic
Telecommunication Engineering

Link: https://ifory.id/abstract/2wbA6aqZvB4C

Corresponding Author
Arief Rahman Hidayat

Institutions
1University of Brawijaya, Indonesia

Abstract
Renewable energy sources that photovoltaic is promising CO2 free alternatives. Photovoltaic has the smallest efficiency value compared to electricity generation from other sources. The effort to increase the efficiency of photovoltaic can use the Maximum Power Point Tracking (MPPT). The purpose of the MPPT method is to find the maximum power point of the photovoltaic. In this research, optimize maximum power point photovoltaic using MPPT Incremental Conductance (MPPT IC) based PID controller. The DC-DC converter used is the SEPIC converter. The advantage of the SEPIC converter is that the efficiency produced is better than the Buck-Boost converter and Chuck converter. Another advantage of SEPIC Converter has non-inverting output voltage polarity with the input voltage. The results of this study found that using the MPPT IC based PID controller can increase efficiency power output photovoltaic than using MPPT IC conventional.

Keywords
Incremental Conductance, SEPIC Converter, PID, Photovoltaic

Topic
Renewable Energy

Link: https://ifory.id/abstract/Mfzy9DcvCGTj

Corresponding Author
Nurul Anriani

Institutions
Magister Pendidikan Matematika Pascasarjana Universitas Sultan Ageng Tirtayasa

Abstract
The purpose of this study was to produce Teaching Materials for secondary teachers based on 21st century skills aspecially for circle topic and to know the quality of teaching materials based on validity and practicability. This research is a development research that includes seven main steps, namely: needs analysis, the ability of researchers as developers, product design, product concepts, development, expert testing, and field trials. The feasibility of developing a teaching materials was obtained based on data from the questionnaire which was then analyzed descriptively quantitatively. The conclusion of this research is the teaching material for secondary teacher aspesially for circle topic based on 21st century skill fulfilling the minimum criteria and expressed very well from the validity aspects and in terms of practical aspects stated practical. Thus, the teaching materials for mathematics teachers based on 21st century skill can be used as a teachers guide on the learning process.

Keywords
Teaching Materials, 21st Century Skills

Topic
Mathematics Education

Link: https://ifory.id/abstract/v42nKAjUZWgz

Corresponding Author
MIN HAJUL ABIDIB

Institutions
a) Southwest University, Chongqing, China
b) UIN Sunan Kalijaga, Yogyakarta, Indonesia
*) minhajulisme[at]yahoo.com

Abstract
As the largest Islamic organization in Indonesia, the Nahdlotul Ulama (NU) has members (santri) which have contributed to the development of Indonesia. Some of Santri either became politically active as a party member or involved a strategic nonpolitical position. The purpose of the study is to find out how the santri build their social identity in their political activities. A case study was conducted to find the process and the central dynamics of santri in political activities. The several semi-structured interviews were used to obtain the construction of identity of two members of Nahdlotul Ulama (NU) who have grown up in the santri tradition. The results of this research show that a unique identity of santri was built by their pride in their status as santri, since they believe that the santri status has more values than others. They also believe that their political activity is a kind of religious activity.

Keywords
Santri, identity, strategic, unique, values.

Topic
Psychology

Link: https://ifory.id/abstract/PFabVjc6LfuE

Corresponding Author
ABdul Wahab Radjab

Institutions
1 Indonesia Institute of Science, Center for Deep Sea Research, Ambon, 97233, Indonesia, radjab002[at]gmail.com, purbiantoro[at]gmail.com
2 Pattimura University, The Faculty of Mathematics and Natural Science, Ambon, 97234, Indonesia, comsa_dub[at]yahoo.com, vanella[at]gmail.com

Abstract
Hatchery is main that plays important role in aquaculture Sea urchin Tripneustes gratilla (Linnaeus 1758). The quality of Sea urchin egg is determined by the absorption of nutrients that carried throughout the gonad development while the quality of nutrients is very likely influenced by the type of food consuming. This research of substrate types on habitat breeding of Sea urchin embryonic development and larval morphometric had been done on October - November 2016 at the laboratory of marine aquaculture LIPI Center for Deep Sea Research. The Samples taken from three different habitats comprises Hative Besar, Liang and Suli. The purpose of this research is to determine the effects of substrates types on habitat breeding of Sea urchin embryonic development and larval morphometric. The method that has been used to determine the morphometric was done by measuring the diameter and height of the shell using a digital caliper and total body weight using a digital scale. To observe embryonic development and larval morphometric done by in vitro fertilization through eggs selection then cultured in petri dish at a density of 10 ind/ml. The result of this research is the most dominant quantity of embryonic development (72 hours) indicated by culture vessel from Hative Besar meanwhile the least is indicated by Liang. The greatest larval morphometric indicated by culture vessel from Hative Besar with length and height of larval body further the larval of culture vessel from Hative Besar shown ossification formation.

Keywords
hatchery, egg quality, embryonic development, larval morphometry

Topic
Marine Resources, Conversation and ICZM

Link: https://ifory.id/abstract/vxB2TZpUKDH4