Indonesia Conference Directory

Corresponding Author
Setia Budi

Institutions
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta Timur 13220, Indonesia

Abstract
Nanostructured films of polyaniline were successfully synthesised using electrodeposition technique on stainless substrates. Fourier transform infrared spectroscopy, and X-ray diffraction investigation indicated that the electrodeposited polyaniline was an emeraldine phase. The influence of electrodeposition potentials on morphology, Brumauer-Emmet-Teller surface area and impedance values of the films were determined based on a scanning electron microscope, surface area analyser, and electrochemical impedance spectroscopy measurements, respectively. The films were composed by nanofiber polyaniline with diameter range from 10 to 60 nm. An increase of electrodeposition potential reduced the polyaniline diameter that produced high surface area films which resulted in high specific capacitance and low impedance values. This work shows the role of electropolymerization potential in controlling the necessary properties of the electrodeposited polyaniline films.

Keywords
nanostrcutured film, polyanilin, electrodeposition potential, BET surface area, impedance

Topic
Material Science

Link: https://ifory.id/abstract/C4GXKTZrjb9z

Corresponding Author
Astri Rinanti

Institutions
Universitas Trisakti

Abstract
Chlorpyrifos is an organophosphate insecticide which has molecular formula C9H11Cl3NO3PS and toxic. Bioremediation is one of environmental friendly method to remove chlorpyrifos as a contaminant because of the microbial enzymatic activity. The aim of this study is to remove chlorpyrifos with temperature and concentration of Aspergillus fumigatus variations. Aspergillus fumigatus fungi acts as bioremedian with chlorpyrifos degradation activity in the temperature range 25-35oC and concentration of A. fumigatus 0.5-1.5%. By using Gas-Chromatography Mass Spectrometer (GC-MS), the optimum chlorpyrifos degradation was achieved at 25oC with 1% concentration of A. fumigatus for 5 days in potato dextrose broth (PDB) liquid media. It shows that A. fumigatus has the ability to remove chlorpyrifos with the efficiency of chlorpyrifos removal reached 85.7% from the initial concentration of chlorpyrifos at 100 ppm.

Keywords
bioremediation, insecticide, chlorpyrifos, Aspergillus fumigatus, potato dextrose broth (PDB)

Topic
Environmental Engineering

Link: https://ifory.id/abstract/4xv3aKrfMtZy

Corresponding Author
Fadliah Fadliah

Institutions
a) Petroleum Engineering Department, Faculty of Earth Technology and Energy, Universitas Trisakti
Jalan Kyai Tapa No.1 Grogol, Jakarta Barat 11440, Indonesia
*fadliah[at]trisakti.ac.id

Abstract
Styrofoam waste was used as a lost circulation material to prevent sudden and simultaneous drilling fluid losses. In this study variations of styrofoam amount and temperature were carried out to see the effect of mass and temperature on physical and rheological properties of drilling mud. Measurement of mud properties using Viscosimeter (Fann VG Meter) with rotor rotation speed of 300 RPM and 600 RPM. The results of the study were then compared with the drilling mud standard. The values of viscosity, plastic viscosity, yield point, gel strength and mud cake increased when the amount of styrofoam added to the mud increased, after the mud was heated to 243°F there was a decrease in the physical and rheological properties. Water loss value will increase along with the addition of LCM substances into the composition and temperature raised in the range of 0.6 mm -1.7 mm. pH level decrease but with a mixture of pH control substances, the pH of drilling mud maintained in alkaline conditions which ranges from 9.5-11.5. The combination of mud that best fits with the standard was addition with 1 grams of Styrofoam and heated in 243oF.

Keywords
Styrofoam; Lost Circulation Materials; Drilling Mud; Physical; Rheological

Topic
Environmental Engineering

Link: https://ifory.id/abstract/qFyacvA63tJf

Corresponding Author
Supriyatin Supriyatin

Institutions
Departement of Biology Education, Universitas Negeri Jakarta
Jl. Rawamangun Muka, Jakarta, Indonesia

Abstract
Learning outcome someone is determined by two factors, namely internal factors and external factors. Personality and motivation including internal factors that affect student learning outcome. This research aims to determine the correlation between personality and motivation with student learning outcome. Participants in this research are students of XI grade majoring in science from 13 Senior High School Jakarta. This research was held on August until September 2018 with 121 students of XI grade majoring in science chosen by simple random sampling. This research used survey technique through correlative study. A correlation analysis revealed that personality and motivation were significant relationship with student learning outcome. Personality and motivation simultaneously provides a considerable contribution with student learning outcomes.

Keywords
motivation, personality, student learning outcome.

Topic
Biology

Link: https://ifory.id/abstract/Jy32uhA4NFtb

Corresponding Author
auliana farabbanie al arsy

Institutions
UNIVERSITAS KANJURUHAN MALANG

Abstract
The key to increasing MSME income is in the results of marketing. In the Millennium 4.0 era which removes the bulkhead place and distance makes it easier for consumers to get the desired item. for business people it is used as a means to bring consumers closer to the business they are engaged in. Various kinds of marketplace facilities have emerged and make it easier for MSMEs to sell their work. The same thing was done by the Government which represented the related office in an effort to help MSMEs in increasing income. Various efforts to produce events that boost the income of MSME entrepreneurs. The purpose of this comparison can be one of the considerations for business people in increasing profits from the business they do. The method used is a comparative study method that compares findings data in the field. Effectiveness and intensity is one of the important keys in increasing the turnover of small and medium entrepreneurs in gaining huge profits.

Keywords
Small Medium Enterprises, Marketplace,Government Policy

Topic
Management Science

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

Corresponding Author
Dewa Ayu Agung Alit Suka Astini

Institutions
Department of Anatomy, Medical Faculty and Health Science of Warmadewa University, Bali-Indonesia

Abstract
Measurement of growth and development in children is the most important thing related to early and appropriate management that can be done if deviations are found. Growth measurements are measurements of the childs weight, height and head circumference. Some previous studies have shown that there are many delays in child development. There are several ways that can be used to screen development, one of them is by using a developmental pre-screening questionnaire that requires special officers trained in its implementation. The results of measurements of growth are often associated with development in children. Based on this, further research is needed regarding the relationship between screening for development and growth in children. The purpose of this study was to analyze the relationship between the results of screening on development using the KPSP method and the results of measuring growth parameters in children aged 0-6 years in Denpasar. The study was conducted using cross sectional analytic. Based on the Pearson correlation test (α = 0.05), it shows that there is a significant negative correlation (r = -0.218; p <0.05) between weight and development. This shows that the higher body weight will further reduce the level of child development.

Keywords
growth, development, developmental questionnaire, weight gain

Topic
Biology

Link: https://ifory.id/abstract/bzCc2vNAG7Bn

Corresponding Author
Ade Suryanda

Institutions
Department of Biology Education, Universitas Negeri Jakarta
Jl. Rawamangun Muka, Jakarta, Indonesia

Abstract
This research inteant was to determine differences in the ecolitercy of natural sciences and social sciences. Ecoliteracy of students is needed to form a sustainable society, and a basic understanding of the ecology and principles of ecosystems is needed. Structure of Observed Learning Outcomes (SOLO) is used to find out the responses of students in their understanding of ecoliteracy. The research sample came from students majoring in natural sciences and social sciences academic year 2018/2019 in 3 Senior High School in Bekasi. The results showed that there were differences in the ecoliteracy of high school students majoring in science and social science that average ecoliteracy score of science students is 179 while the average ecoliteracy score of social studies students is 169. The level of SOLO taxonomy level of science students is at the relational and extended abstract level and the SOLO taxonomy level of the social students is at the multistructural level up to the extended abstract level. The conclusion of this study is that there are differences in the ecoliteracy of students from science and social studies subject to taxonomy Structure of Observed LearningOutcomes (SOLO).

Keywords
Ecoliteracy, Taxonomy SOLO

Topic
Biology

Link: https://ifory.id/abstract/WepKMh2aPj9G

Corresponding Author
Samadi Samadi

Institutions
Universitas Negeri Jakarta
*samadi[at]unj.ac.id

Abstract
The study aims to get a suitable model to carry out environmental engineering primarily in the aspects of social security and tourism. The study was conducted in May-December 2018 in Plajan Village, Jepara, Central Java. This research applies the Research and Development method. The results showed that a suitable model for carrying out environmental engineering in the village of Plajan, Jepara, Central Java Province mainly in the aspects of social security and tourism is by involving stakeholders in the village, with a membership consisting of elements of society, academics, community caring for tourism doing main activities; this power is given a jargon Community forums that work together are synergistically coordinative.

Keywords
Environmental Engineering, Social Resilience, Tourism Resilience, Plajan Village, Central Java.

Topic
Environmental Engineering

Link: https://ifory.id/abstract/un3BXkGeayKr

Corresponding Author
Melati Ferianita FACHRUL

Institutions
Department of Environmental Engineering, Universitas Trisakti, Jakarta, Indonesia

Abstract
Constructed wetland is engineered, man-made ecosystems is one of the wastewater treatment systems to reduce water pollution by using plants. The purpose of this study to know the efficiency of Sub-Surface Flow constructed wetland with Vetiveria zizanioides in domestic wastewater treatment and to reveal the effect of aeration and detention time to reducing BOD concentrations in domestic wastewater. The research has been conducted in constructed wetland located in Srengseng Sawah Village of continue aerated reactor and without aeration as control reactor. Detention time (days) 2 and 3 was setup, then sample was taken for BOD concentration. The results indicated that constructed wetland with aeration and detention time 4 days had a higher performance to remove BOD up to 90% than without aeration and less than 4 days process. This results fulfill the requirement of the quality standards of the Decree of DKI Jakarta Governor No. 122 of 2005 and Decree of the Minister of Environment No. 112 of 2003

Keywords
Constructed Wetland, Domestic Wastewater, BOD, Vetiveria zizanioides

Topic
Environmental Engineering

Link: https://ifory.id/abstract/RfmV7hvTe36N

Corresponding Author
Akhmad Ahfas

Institutions
1Electrical Engineering, Muhammadiyah University Sidoarjo

Abstract
Motorbikes are popular of transportation with high usage rates. Safeguarding motorbikes is a necessity for users to provide security. Researchers offer motorcycle safety using sound indicators. The working principle of motorcycle safety offered is after the main key or contact is on position and the Mic sound indicator is blown, amplifier circuit works to drive the relay driver that connects the CDI unit. Motorcycle safety circuit system will live and if there is no blow, motorcycle safety circuit will not function. Research on motorcycle safety circuit can be used with input indicator sound. Components needed include Mic condenser, driver relay circuit, power supply. Measurement of the relay driver circuit and condenser mic aims to find out which circuit can work as planned. The measurement results obtained testing the motorcycle safety circuit with the following explanation: When the sound indicator and driver get a touch simultaneously which gives a signal that the signal from the sound indicator is connected to the amplifier driver, so that the signal is detected, will provide input to the relay (on) and CDI unit when the motorcycle will work. With an indication the LED will turn on.

Keywords
Motorcycle safety circuit system

Topic
Electrical Engineering

Link: https://ifory.id/abstract/pj6KgBD9aFGk

Corresponding Author
Samadi Samadi

Institutions
a) Universitas Negeri Jakarta
*samadi[at]unj.ac.id
b) Universitas Khairun, Ternate Maluku Utara

Abstract
This study aims to map safe snorkeling routes on Tidung Island based on a combination of transect techniques and social reviews. The study was conducted in April-October 2018 in Tidung Island Kepulauan Seribu DKI Jakarta. This study applies a participatory method with regional sampling. The results showed that an observations of the safe area for snorkeling of coral reefs at points: (1) 5,7999,200,0003 ° LS and 106,4965,900,000,000 ° East; (2) 5,79825999999 ° LS and 106,50914000000 ° East; and Small Tidung Island at point (3) 5,80177854296 ° LS and 106,53036947600 ° East.

Keywords
Environmental Engineering, Safe Snorkeling Paths, Tidung Island, Kepulauan Seribu DKI Jakarta.

Topic
Environmental Engineering

Link: https://ifory.id/abstract/q2dZtfwvWXRk

Corresponding Author
Fadilah Ilahi

Institutions
UIN Sunan Gunung Djati Bandung

Abstract
Indonesia suffered a diphtheria outbreak in the late of 2017 after the last case in the 1980s. Over the years, DPT (Diphtheria Pertussis Tetanus) vaccine is believed to be the only ways of preventing diphtheria outbreaks. The Indonesian government requires all infants aged 2-4 months old to get DPT vaccine in order to get the immunity against diphtheria-causing bacteria with a single dose of vaccine on each month. The problem is when some infants do not have the complete vaccine so the effectiveness of DPT vaccine is need to be questioned. In this paper, the authors try to construct the model to see how effective the DPT vaccine for those cases. The population assumed to be closed population and consisted of SIR (Susceptible, Infected, and Recovery) population and the vaccine notated as a function of a dose that has taken by the infant. Furthermore, this model will be analyzed the stability using eigen values and basic reproduction number (R_0). The simulation is done to provide an overview of the effectiveness of the vaccine dynamically. Analysis and simulation results show that complete dose of DPT vaccine plays an effective role in reducing the spread of diphtheria.

Keywords
Diphtheria, vaccine, outbreak, epidemic, basic reproduction number, mathematical model

Topic
Mathematics

Link: https://ifory.id/abstract/VGgE2Q46LCF8

Corresponding Author
Della Rulita Nurfaizana

Institutions
1) Economic Education, Postgraduate, Universitas Negeri Malang
2) Master of Social Science Education Study Program
Universitas Kanjuruhan Malang

Abstract
The results of previous studies indicate that there are several learning models that have the potential to improve students competencies in reviewing Produk Kreatif dan Kewirausahaan (PKK). Through iMindmap media presented by teachers, vocational students have the opportunity to develop project scenarios based on local potential using a map business. This experimental study aims to determine the effectiveness of the mapping-project learning model by using iMindmap media based on local potential to improve the competency of student entrepreneurship. The mapping-project instrument was developed by researchers and validated by experts. The results showed that the project-mapping learning model using iMindmap media based on local potential could improve student competence in analyzing business opportunities using SWOT analysis, and designing prototypes of superior products based on local potential using a business map. This study recommends that with the mapping-project model, students ability to explore PKK material becomes more profound, meaningful, and student-centered. Future research is needed to analyze the contribution of mapping projects by using iMindmap media on exact learning.

Keywords
Mapping-project, iMindmap, Local Potential

Topic
Computer Science

Link: https://ifory.id/abstract/4fUdtADzT82L

Corresponding Author
Hasniah Aliah

Institutions
a) Department of Physics, UIN Sunan Gunung Djati Bandung, Jl. A H Nasution 105, Bandung 40614, Indonesia
*hasniahaliah[at]uinsgd.ac.id
b) Center for Applied Nuclear Science and Technology, BATAN, Jl. Taman Sari 71 Bandung 40132, Indonesia
c) Department of Physics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi 229 Bandung 40154, Indonesia
d)Center of Research, UIN Sunan Gunung Djati, Jl. A.H. Nasution 105 Bandung 40164, Indonesia
e) Department of Physics Education, UIN Sunan Gunung Djati Bandung, Jl. A.H. Nasution 105 Bandung 40164, Indonesia

Abstract
This report has been written based on research aimed to know electrical characterize, structure, and morphology of ceramic nanocomposites. Materials are used to consist of Indonesia local minerals are jarosite and manganite minerals as sources oxide iron, mangan, and oxide zinc is from commercial. The third materials were mixed by using precipitation method whereas the ceramic nanocomposite was fabricated by using a screen printing method and fired at 600 °C temperature with a furnace. Sample structure and morphology had been examined by using XRD and SEM respectively. The result of the characterization indicated that a sample was fabricated measured nanometer scale with three phases on diffraction peaks and had hexagonal-spinel structures. The sample also had high porosity. The electrical charracteristic of the sample was examined with an electrical tester had to function R-T in ambient and alcohol environments. Resistance value had been known in ambient and alcohol environments were different. The difference in resistance value indicated that a sample had a very different response in both of the environments. Nanometre size and high porosity of the sample were very supported to be processed gas adsorption. So, a sample had a high level of response. Therefore, nanocomposite ceramic had been fabricated potentially for application in the sensor field, especially as an alcohol gas sensor.

Keywords
Nanocomposite, Jarosite, Manganite, Spinel, Alcohol gas sensor

Topic
Material Science

Link: https://ifory.id/abstract/pZ7Hf2qgFdwT

Corresponding Author
Samadi Samadi

Institutions
Universitas Negeri Jakarta
*samadi[at]unj.ac.id

Abstract
The research objective was to develop environmental aspects for social adaptation to tourism development on Tidung Island, Thousand Islands, DKI Jakarta. The study was conducted in May-October 2018 in Tidung Island Kepulauan Seribu DKI Jakarta. This study applies a participatory method with purpossive sampling. The results showed that : (1) Potential in the Tidung Island area that can be developed as a tourist attraction can be diverse, and (2) There are obstacles to development efforts such as the lack of intensive development of tourism conscious groups, low tourist visits, limited development budgets, low awareness of local government, and still low quality of human resources.

Keywords
Environmental Engineering, Social Adaptation, Tourism Development, Tidung Island, Kepulauan Seribu DKI Jakarta.

Topic
Environmental Engineering

Link: https://ifory.id/abstract/Yf9W2pxGUqMm

Corresponding Author
Ernita Maulida

Institutions
Universitas Negeri Jakarta
Jl. Rawamangun Muka, Jakarta 13220, Indonesia
*ernitamaulida[at]unj.ac.id

Abstract
The aim of this study is to identify factors that influence women customers online shopping satisfaction on baby clothes product from the perspective of the total shopping experience. A research method is a quantitative approach, through a survey of 300 online customers with criteria at least they have purchased baby clothes online once a month or more. In this study, there are six indicators are identified, namely; web design, brand, product information, security service, price, and customer service responses. The findings revealed that all indicators are highly satisfied for women customer online shopping in Jakarta. It means that consumer expectation is the same as what they received.

Keywords
customer satisfaction, online shopping, baby clothes

Topic
Management Science

Link: https://ifory.id/abstract/rDfpMYPaQec8

Corresponding Author
Dwi Hadidjaja

Institutions
1,2 Electrical Engineering, Muhammadiyah University Sidoarjo

Abstract
Abstract. By implementing SMS on scheduling bird feed with automation, it makes it easier for poultry farmers to feed birds. Scheduling bird feed can be done continuously to avoid excessive amounts of feed. This application works according to the time set by the user. This application uses a servo motor to open and close the feed valve, the microcontroller system as the main controller, SIM 800L as the information provider in the form of SMS, and RTC as a time scheduling system. In scheduling bird feed can be done per second. There is a GSM shield notification to the user when the system is running. The average provider or GSM is caused by signal factors during the trial, and depending on bad weather or indeed the signal tends to be difficult. Servo motor process with its own open angle between 0°-90° with a delay time of 50 seconds. For the 800L SIM it takes a voltage between 3.8 - 3.9 volts.

Keywords
GSM, Microcontroller, Servo Motor, SIM800L

Topic
Electrical Engineering

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

Corresponding Author
Havidh Pramadika

Institutions
(a)Petroleum Engineering Departemant, Univesitas Trisakti
*havidh[at]trisakti.ac.id

Abstract
Indonesian oil and gas needs continue to increase, all of which are inversely proportional to oil and gas production which is always decreasing, one of the efforts to increase production is by EOR injection, one of the EOR injections is polymer injection. In this study we will use FP3300S polymer with a concentration of 500ppm, 750ppm, 1,000ppm, 1,250ppm, 1,500ppm, 1,750ppm, 2,000ppm, 2,250ppm and 2,500ppm. The purpose and objective of this study was to determine the effect of polymer concentration on increased viscosity, determine effect of polymer concentration on polymer screening (compatibility, filtration, screen factor, thermal stability), and to find out how the results of polymer injection, the higher the study found. polymer concentration the higher the viscosity where the highest at the polymer concentration of 2,500ppm with 19,38cp, the viscosity needed by the polymer as the injection fluid is the polymer viscosity greater than 2X the oil viscosity to be injected, where the oil viscosity is 5,2cp. then while in polymer screening it is found that the higher polymer concentration is not necessarily good for screening polymers, and polymer inclusions have been shown to increase recovery factor, recovery factor obtained at 51.5% water injection and polymer injection is 23.1%, before injection really need to be on do screening first, in order to get the most optimal concentration to be injected.

Keywords
Consentration, Polymer, Injection.

Topic
Industry Engineering

Link: https://ifory.id/abstract/CeP6u7NJp4vR

Corresponding Author
Apriandi Rizkina Rangga Wastu

Institutions
a) Petroleum Engineering Department, Universitas Trisakti
*apriandi.rizkina[at]trisakti.ac.id

Abstract
The function of drilling mud is to lift drill cuttings to surface while maintaining condition in drilling hole. The purpose of this study was to determine ability to lift cutting in oil drilling wells using Cutting Transport Ratio, Cutting Concentration and Cutting Carrying Index methods. In drilling operations there are two important things must be considered in the wellbore cleaning, namely pumps and drilling mud rheology. Penetration formation layer will result in cutting due to chisel that erodes the rock so that if left unchecked it can accumulate at the bottom borehole. The speed of flow of sludge fluid is flowed, the flow pattern in circulation of sludge, and ability to lift the cutting in well are affected by mud pump to determine flow rate of pump. In addition to the value of rheology of sludge such as plastic viscosity and yield point values of mud density also affect the performance of the sludge to be a medium for lifting drill bits. Provisions on the method for lifting the cutting with the Cutting Transport Ratio method must have a value of> 90%, the Cutting Concentration method has a value of <5%, and Cutting Carrying Index has a value of 1.

Keywords
Cutting, Drilling fluid, Cutting Transport Ratio, Cutting Concentration and Cutting Carrying Index

Topic
Industry Engineering

Link: https://ifory.id/abstract/mFxBWbreq29N

Corresponding Author
Putu Indah Budi Apsari

Institutions
FACULTY OF MEDICINE AND HEALTH SCIENCES, WARMADEWA UNIVERSITY

Abstract
Hyperuricemia is a condition of elevated blood uric acid level above normal value. One of the risk factors that causes hyperuricemia is high purine intake. This study aimed to assess the relation between purine intake and blood uric acid level in postmenopausal women in the working area of Puskesmas II East Denpasar. Analytic observational method with cross-sectional approach used 100 postmenopausal women collected by simple random sampling technique. Data of daily purine intake from respondents were obtained by semi-quantitative food frequency questionnaires. The study results showed that daily purine intake of respondents was in the range of 142.48-708.47 mg/day and the average was 408.72 ± 153.50 mg/day. Levels of blood uric acid in respondents were in the range of 2.6-8.4 mg/dL and the average was 5.52 ± 1.661 mg/dL. Purine intake had the strongest effect on blood uric acid level (p = 0,019; OR = 3,198; 95% CI = 1,208-8,461) compared with hypertension and BMI (p = 0,040; OR = 2,573 ; 95% CI = 1.043-6.347; p = 0.378; OR = 1.521; 95% CI = 0.598-3.866, respectively). It can be concluded consume high purin diet cause elevated uric acid level among post menopausal women.

Keywords
Purine, Uric acid, Postmenopause

Topic
Biology

Link: https://ifory.id/abstract/hGCe7fRwdt6u

Corresponding Author
Putu Indah Budi Apsari

Institutions
faculty of Medicina and health sciences, Warmadewa university

Abstract
Patient with refractive disorders in Indonesia almost reached 25% of the population or about 55 million people. Myopia is one of the refractive disorders in the eye that has a high prevalence in the world. The purpose of this study was to know the risk factors of myopia in junior high school students in Denpasar. This research was an analytical research with case control design with subjectstaken from junior high school students in Denpasar. School samples were choosed using cluster random sampling and the students by simple random sampling. There are 49 people who has miopia as the case and 49 people without it as the control. Data were collected by direct interviewed using prepared questionnaires, is analyzed using chi square test. The result showed significant correlation between genetic factor and myopia (p = 0,013; α <0,05), lifestyles (p = 0,02, α <0,05), and vitamins A, C, D and E (p = 0,039; α <0,05). It is expected that community healht care and schools to conduct routine checks, early detection of eye health and educate the lifestyle and vitamin consumption.

Keywords
myopia, genetic, lifestyle, vitamins A, C, D and E.

Topic
Biology

Link: https://ifory.id/abstract/URJaCr7FfGhg

Corresponding Author
Izza Anshory

Institutions
(1)Department of Electrical Engineering, Universitas Muhammadiyah Sidoarjo, Indonesia
(2)Departmen of Electrical Engineering, Institut Teknologi Sepuluh Nopember (ITS) Surabaya, Indonesia

Abstract
One of the problems in the optimization process in the Brushless Direct Current (BLDC) speed control system is to obtain a mathematical model in the form of a transfer function. The purpose of this study to mathematically model BLDC motors in transfer functions, and optimization using Proportional, Integral and Derivative (PID) controllers, and fuzzy logic to tune PID controller parameters. The first method used is the process of identifying input and output data from the BLDC motor physical system. The input and output data of the test results simulated to form a mathematical model. The mathematical model of BLDC motor used as the basis for carrying out the optimization process with open loop systems, PID controllers, and fuzzy logic. The results of the research on the optimization process of the BLDC motor speed control system with the fuzzy logic methods obtained the best value for rise time value of 1.25 seconds, settling time value of 382.10 seconds, and peak time is 382.2 seconds.

Keywords
Electric bicycle, BLDC motor, system identification, fuzzy logic, PID controller

Topic
Electrical Engineering

Link: https://ifory.id/abstract/eAwzhkC9BNa4

Corresponding Author
Agus pratomo andi Widodo

Institutions
a)Department of Special Education, Indonesia University of Education
*andi.pkh.student[at]upi.edu
b)Department of Chemistry, Indonesia University of Education
c)Department of Special Education, Indonesia University of Education
d)Department of Special Education, Indonesia University of Education

Abstract
The aim of this study is to develop ways to teach heat transfer lessons to slow learner students. The study used a single-subject research approach with A-B design (baseline and intervention) in inclusive school in Banjarmasin. The subject of this study consisted of three slow learner students. Teaching demonstration methods with collaboration between special teachers and regular teachers are given as independent variables. The results of the study revealed that subjects that require cognitive understanding can be taught to slow learner students. However, the success achieved cannot be separated from collaboration between regular teachers and special teachers. Special teachers play a role in conveying instructions to be simple and concrete. A quiet learning atmosphere in the absence of other audio visual stimuli, besides experimental media that are taught, can make slow learner students more focused. The repetition factor of subject matter by special teachers during learning activities is very helpful because the characteristics of the slow learner are more likely to be short-term memories.

Keywords
slow learner, heat transfer, teaching, repetition, regular teacher, special teacher

Topic
Physics

Link: https://ifory.id/abstract/wGMHmyrY2qF4

Corresponding Author
Dimas Ariwibowo

Institutions
Universitas Pendidikan Indonesia

Abstract
LED technology is currently widely applied to Street Lighting systems, in addition to being environmentally friendly, LED technology provides high energy efficiency. This paper explains the comparison of energy efficiency before and after redesign using two methods. The object of research in this paper is Street Lighting of Jalan Pajajaran, Bandung City. The method used in this paper is Homogenius Luminaire (uniform) and Non-Homogenius Luminaire (not uniform). The results of this study show a comparison of energy efficiency of the two methods used. Using the Non-Homogenius Luminaire method provides a good solution in terms of energy efficiency. In addition, this method reduces light pollution and the use of electricity is relatively low compared to when before it redesigned. The results of this study are expected to be a consideration for the design of Street Lighting.

Keywords
energy efficiency; LED; photometric computation; street lighting

Topic
Electrical Engineering

Link: https://ifory.id/abstract/pU6EvCHcmVGT

Corresponding Author
Gerry Resmi Liyana

Institutions
a) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
*gerryliyana[at]gmail.com
b) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
*ahyuwono[at]gmail.com

Abstract
ZnO nanostructures have been attracting much interest of researchers due to their unique properties and wide potential for various applications. In this study, the effect of seeding temperature and growing time on the characteristics of ZnO nanorods were investigated. The seed solutions were first prepared at temperature of 0, 30, and 60℃ for 1 hour using zinc nitrate tetrahydrate and hexamethylenetetramine as precursors. The ZnO seed layers were then deposited onto ITO glass substrates by spin coating technique prior to the chemical bath deposition (CBD) growth at temperature of 90℃ for different times (3, 4, and 5 hours). The synthesized ZnO nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV–Vis spectrophotometry. The results showed that with the increase in seeding temperature from 0℃ to 60℃, the crystallite size decreased from 71.32 to 38.95 nm, while the band gap energy increased from 3.27 to 3.55 eV, respectively. While with increased of growing time during CBD, the crystallite size was adversely increased from 65.37 to 88.09 nm, and consequently the band gap energy was found to decrease from 3,55 to 3,52 eV.

Keywords
ZnO nanorods, ITO, chemical bath deposition, seeding temperature, growing time

Topic
Material Engineering

Link: https://ifory.id/abstract/nXJPv7agMWAc

Corresponding Author
Donny Trihanondo

Institutions
Telkom University

Abstract
This paper tries to explain the architectural landscape of Girimekar village, within a Corporate Social Responsibility project of Country Owned Corporation and a Higher Education institution located in Bandung. This Research is aimed to examine the social behavior and the role of architectural design in its part in social change. The methodology used in this research is Participation Rural Apraisal (PRA) method. The preliminary findings are that social behavior has a role within architectural space. The research is still ongoing, and further research data are needed to proof consistency in other villages.

Keywords
Landscape Architectural Design, Social Behaviour, Social Change, Social Responsibility

Topic
Architecture

Link: https://ifory.id/abstract/LpNrMUW6d98t

Corresponding Author
Puri Wijayanti

Institutions
(a) Program Studi Teknik Perminyakan, FTKE, Universitas Trisakti, Jakarta Barat 11440, Indonesia
*puri.wijayanti[at]trisakti.ac.id
(b) Program Studi Teknik Perminyakan, FTKE, Universitas Trisakti, Jakarta Barat 11440, Indonesia

Abstract
Quantitative analysis of reservoir properties in a well is determined by transient pressure analysis. Transient pressure according to its type consists of Pressure Build up and Pressure Draw Down. this analysis provides an overview of the characteristics of a reservoir. This analysis includes the process of determining drainage area, shape, heterogeneity, porosity, average pressure, skin, permeability, and distance from a reservoir to boundary or flow discontinuities. This test is to determine the ability of gas production in the PW-02 Well, carried out by using the Modified Isochronal test method. This test aims to determine the productivity of a potential (Absolute Open flow). Transient pressure test on PW-02 Well using the Pressure Build up Test (Type Curve Pressure Derivative) method, it is found that the well model is Vertical well and the reservoir model is Two porosity PSS. While the boundary model obtained is Rectangle. Then, the data obtained in the form of positive skin is 1.46, the permeability is 62.5 mD and the reservoir pressure is 2529.32 psia. Based on the analysis obtained Absolute Open Flow Potential (AOFP) of 117406 mscf/D. While the deliverability test value obtained is 117413 mscf/D with a n value of 0.825.

Keywords
AOFP, Pressure Build Up Test, Modified Isochronal Test, Well Testing, Derivative Pressure

Topic
Material Engineering

Link: https://ifory.id/abstract/r4PjpuFNwM9U

Corresponding Author
M Sunu Probo Baskoro

Institutions
a) Universitas Negeri Jakarta
b) Universitas Negeri Jakarta
c)Lembaga Kantor Berita Antara TV
d) Universitas Negeri Jakarta
e) Universitas Negeri Jakarta

Abstract
The purpose of this study was to analyze the "social map" related to the relationship between exposure to environmental news and curiosity over issues of environmental damage together with the behavior of rejecting non-environmentally friendly products. The study was conducted in December 2018 - January 2019 in held at the Antara TV News Agency. This study uses survey methods and correlation techniques. The results of this study indicate that: (1) There is a positive relationship between exposure to environmental news and rejection behavior of non-environmentally friendly products. Socially, if the news relating to the positive environment will form a rejection of the increasingly positive community behavior towards products that are not environmentally friendly. (2) There is a positive relationship between Curiosity over Environmental Issues with product rejection behavior not environmentally friendly. Socially, if the publics curiosity about environmental issues is high, the behavior of rejecting non-environmentally friendly products also increases.

Keywords
Social map, Environmental news, Environmental damage, Rejection behavior, Environmentally friendly.

Topic
Environmental Engineering

Link: https://ifory.id/abstract/4fHVCYLAJ8y9

Corresponding Author
Wati Susilawati

Institutions
Universitas Garut

Abstract
SERVICE QUALITY FACTORS: THE EFFECT OF WEB NAVIGATION ON ONLINE TRANSFORTATION IN INDONESIA T Mulyana, W Susilawati, W Wufron, N Mardani Management Departement, Universitas Garut Jl. Raya samarang 52A, Garut, Indonesia E-mail: tatang.mulyana@uniga.ac.id Abstract. The purpose of this research to analyze the service quality of online transportation an area in Indonesia, seen from consumer perceptions, and map service quality attributes based on consumer perceptions. The research method used in this research is Service Quality Analysis (SERVQUAL) and Importance Performance Analysis (IPA). The population in this research is online transportation consumers, who have used a go ride service at least 1 time. The sampling used in this research was sampling quota of 200 respondents. The results of this research indicate that overall there is a gap between performance values with consumer expectations of -0.5, so it can be assumed that the service quality of Gojek in the region according to consumer perceptions is quite good. Based on the results of the mapping it was found that the factor of ease of web navigation became one of the factors of the services quality of online transportation. So that these factors must be a concern of the company.

Keywords
consumers, navigation website, service quality

Topic
Management Science

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

Corresponding Author
Farida Nur Kumala

Institutions
Universitas Kanjuruhan Malang

Abstract
Most of the encyclopedias that are available are in the form of printed encyclopedia. However, the number of online encyclopedias is still limited and generally, they are not too interesting to be read by students since they tend to load information about unfamiliar animals for students. This paper seeks to describe the use of local wisdom based electronic encyclopedia as a learning media in the Science subject in Elementary school. The finding showed that the use of online encyclopedia triggers students to be more motivated and enthusiastic to learn during the learning process. The familiar contents and concepts given made a more meaningful learning process for students.

Keywords
Local Wisdom, E-Encyclopedia, Science Learning

Topic
Computer Science

Link: https://ifory.id/abstract/dUQexVkBEFa8