Indonesia Conference Directory

Corresponding Author
Sherly Novia Sari

Institutions
Research Center of Physics, Indonesian Institute of Indonesia

Abstract
Low cost and very simple activation method (KOH as activating agent) is used for the synthesis of activated carbon derived from the biomass manihot esculenta crantz (mocaf). The mocaf derived activated carbon as electrode material in supercapacitor and characterized by SEM for to analyse the morphology, Brunauer-Emmet-Teller to know the surface area and to measure the electrochemical performance characterized by Cyclic voltammetry, Galvanostatic charge-discharge and Electrochemical impendance spectroscopy. Electrochemical studies indicate that the mocaf delivers the maximum specific capacitance of (36 F/g) at scan rate (5 mV/s) in aqueous electrolyte (1 M LiPF6) for (2.0 V) operating voltage. The electrodes from mocaf exhibits good rate capability with an excellent charging/ discharging cycle stability in aqueous electrolyte (1 M LiPF6) during 10.000 cycles. The results indicate that mocaf shows good electrochemical properties to be used for energy storage application.

Keywords
mocaf, supercapacitor, energy storage, biomass, low cost

Topic
Material Engineering

Link: https://ifory.id/abstract/rFmLqDuVR3Qc

Corresponding Author
Eri Satria

Institutions
Department of Informatics
Sekolah Tinggi Teknologi Garut
Jalan Mayor Syamsu no 1 Garut, Indonesia

Abstract
The existence and purpose of mosque is important in Islam. In mosque, there is some activities related to religius and social life. Although mosque identically used as center of religion activity, but there is some potencies can be utilized from mosque such as, economy, education, sosial, etc. The main idea of this research is to design an electronic catalog so people can map the information about mosque potencies. In this paper, we use rational Unified Process (RUP) for research staging and Unified Modelling Language (UML) as modeling tool. Result of this research is an electronic catalog application which can provide the mapping of information about mosque potencies and activities related to mosque accurately. We hope with this electronic calatog, people can be more aware to potencies, function, and impact of mosque to social life around it.

Keywords
Catalog, mosque, moslem, Islam

Topic
Computer Science

Link: https://ifory.id/abstract/jz2Pk7qrUAMZ

Corresponding Author
Wahyu Aulia Nurwicaksana

Institutions
State Polytechnic of Malang

Abstract
This paper presents a mechanical design and electronic control for the angle of attack on the Vertical Axis Wind Turbine(VAWT) darrieus type with NACA0015 and 3 blades. This research was conducted to obtain high efficiency absorption power on various wind speed. The VAWT mechanical design is based on systematic calculations with a height of 150cm and a diameter of 120cm. NACA0015 airfoil with calculations in the NACA airfoil database obtained blade length of 15.892cm and width of 1.905cm. The electronic control on this system, Arduino mega controller, has input from an anemometer sensor, and rotary encoder sensor. While, the output is servo motors for 3 blade. A microprocessor control unit is programmed to control the adjustment of blade angle of attack. The angle of attack is defined by wind speed, angular speed of VAWT, and a defined TSR (Tip Speed Ratio). The angle of attack control method is PID (Proportional-Integral-Derivative) algorithm. By setting the TSR value constantly at 3.5-4, the angle of attack will be adapted even on any various wind speed. As a result, the maximum power absorption will be obtained on various wind speed. This system can increase power efficiency of VAWT up to 35-40%.

Keywords
Angel of Attack; Power Optimizing; TSR; Various Wind Speed; VAWT

Topic
Electronics Engineering

Link: https://ifory.id/abstract/Uj2WuqzbZ4pn

Corresponding Author
Rina Febriana Hendrawan

Institutions
a) Technology and Vocational Education, Faculty of Engineering, Universitas Negeri Jakarta, Jakarta, Indonesia
*rinafebrianaunj[at]gmail.com
b) Electrical Engineering Education Study Program, Faculty of Engineering, Universitas Negeri Jakarta, Jakarta, Indonesia

Abstract
This study was conducted to explore the importance of graduate work skills through an industry perspective. Respondents consisted of 23 industry in various fields in Jakarta. The instruments used in this study were adapted from the SCANS model and integrated the Indonesian National Qualifications Framework (KKNI). The results of the survey show that the industry has a high interest in employability skills and achievement of employability skills indicators for students in Jakarta. This study also indicates that there is no significant difference between company size and employability skills. However, there are substantial differences between indicators in employability skills.

Keywords
Industry, employability skills, managerial skills, attitude

Topic
Industry Engineering

Link: https://ifory.id/abstract/LEZJQTe4aAmY

Corresponding Author
Riser Fahdiran

Institutions
1Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, West Java, Indonesia.
2Research Center for Climate Change, Universitas Indonesia, Depok, West Java, Indonesia.
3Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Jakarta, Jalan Rawamangun Muka No. 1, 13220 East Jakarta, Indonesia.

Abstract
Black-winged myna (Acridotheres melanopterus) is an endemic species from Indonesia. Nowadays, the bird can be found only in Java and Bali islands, and it is important to make sure that the breeding centre is effectively breeding the bird to help the decreasing population wilderness. There is no difference between male and female based on the morphological characteristic. It can be a problem for the breeders to identify the sex when they have to pair the bird. The aim of this research is to identify the differences between male and female black-winged myna based on morphometric characteristic. There are weight, length, width, circumference, and the spread of the wings. The data is processed using principal component analysis (PCA) on the SPSS 20 program. The samples are 71 black-winged myna with minimum two years of age from breeding facilities in Java and Bali islands. Based on the research, morphometric characteristic that distinguishes male and female bird mostly is their wingspan and their weight. Morphometric characteristics of the female myna are smaller than the male. This result is essential for breeders to minimize the risk of pairing the same sex bird.

Keywords
Endemic species; morphometric; black-winged myna

Topic
Biology

Link: https://ifory.id/abstract/aUXc9QKAHybt

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
Teguh Budi Prayitno

Institutions
Universitas Negeri Jakarta

Abstract
We have calculated the energy of static solitary wave solutions of the one-dimensional Gross-Pitaevskii equation with time-dependent parabolic trap, time dependent scattering wave length of s-wave, and time-dependent external potential describing gain or loss term. Some written solutions of the equation were proposed by Atre et al. [Phys. Rev. E 73 (2006) 056611] which two of them based on the experimental results presented by Strecker et al. [Nature (London) 417 (2002) 150]. The solutions satisfy the condition of solitary wave solution since they are localized over all space. By this argument, the energies are obtained by integrating the Hamiltonian density over all space formulated in the Classical Field Theory. To calculate the energies, we construct the appropriate Lagrangian density representing the equation by initially writing the ansatz Lagrangian density and substituting into Euler-Lagrange equation. We find that two of them have the same energies and the other one should be mathematically have the pure imaginary function describing gain-loss term in order to keep energy real.

Keywords
Solitary waves, Bose-Einstein Condensation, Gross-Pitaevskii

Topic
Physics

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

Corresponding Author
Nurul Fatia Jannah

Institutions
a) Student of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University
*nurul.jannah[at]tp.idu.ac.id
b) Teacher of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University

Abstract
ENGINEERING COMPOSITE MATERIALS AS RADAR WAVE ABSORBERS - The latest technological developments make a fighter aircraft capable of entering enemy territory without being detected thanks to material engineering carried out with a combination of two or more materials with different characters in each constituent component to obtain a new element with characteristics as desired. This research was conducted using the analytic hierarchy process (AHP) method that compares the character of materials to be used on stealth aircraft. Data is obtained through literature studies, and secondary data use. The composite material was chosen as the material used in stealth fighter aircraft, as the anti-radar fighter aircraft, considering the nature of its properties which makes the aircraft structure stronger and lighter and meets the STWR standard (strength to weight ratio) as a comparison between strength and mass the material itself.

Keywords
Material Engineering, Composite, Radar Absorber, AHP

Topic
Material Engineering

Link: https://ifory.id/abstract/y7P62EHwXFMC

Corresponding Author
Dhami Johar Damiri

Institutions
Electrical Engineering Department, Sekolah Tinggi Teknik PLN, Jakarta, Indonesia

Abstract
The purpose of this research is to develop on-grid engineering design of 52,5 KW solar photovoltaic system on Industrial Rooftop Building. The development of solar photovoltaic system is to satisfy high demand of electrical energy for industry, offices, and public with minimum cost. Taking consideration of green energy, solar energy might be chosen as an alternative to generate electric power by utilization of rooftop on industrial building. This research was conducted using broad database of meteorological data i.e. global daily horizontal solar irradiance. Additionally, rooftop photovoltaic development, Single Line Diagram, layout plan, photovoltaic array connection, and structure support photovoltaic module were developed using Helioscope and PV Syst software. Based on 6 months period simulation, annual energy produced on rooftop is 1043.88 kWh/kWp, global Horizontal Irradiance (GHI) 1301.96 kWh/m2, actual Global Horizontal Irradiance 5.6%, and performance ratio (PR) 80.30 % and capital rooftop photovoltaic project forecast. This result can be used for industrial and big office in west Indonesian recommendation to develop solar energy system on rooftop building

Keywords
Solar Photovoltaic system on-grid, industrial rooftop building, Helioscope, PV Sys

Topic
Electrical Engineering

Link: https://ifory.id/abstract/Xt94JVFQMvgB

Corresponding Author
Husni Husin

Institutions
a) Department of Chemical Engineering, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia
b) Graduate School of Chemical Engineering, Universitas Syiah Kuala, Darussalam Banda Aceh, 23111, Indonesia
*husni_husin[at]che.unsyiah.ac.id

Abstract
Study of hydrogen production from aqueous glycerol solution using RuO2-loaded LaNaTaO3 photocatalyst is reported in this paper. This research aims to investigate the influence of RuO2 co-catalyst and glycerol as a sacrificial reagent on photocatalytic process of hydrogen production. La-doped NaTaO3 was prepared via sol-gel route. The RuO2 was loaded onto the LaNaTaO3 surface by impregnation method. The sample were characterized by Scanning Electron microscopy (SEM) and X-ray diffractometer (XRD). The XRD spectrum shows that the La-NaTaO3 photocatalyst has high crystallinity. The SEM analysis indicates that the size of La-NaTaO3 photocatalyst is ranging from 100 to 250 nm without agglomeration and RuO2 as a co-catalyst is well loaded into the La-NaTaO3 surface. Loading RuO2 on La-NaTaO3 photocatalyst is proven to increase the rate of hydrogen production by 9.8 times with addition of glycerol as a sacrificial reagent. The highest hydrogen production activity was obtained at 0.3 wt.% ruthenium loading and increase significantly with increasing glycerol concentration. The role of co-catalyst RuO2 and glycerol as sacrificial reagent enhanced the performance of La-NaTaO3 photocatalyst by playing an active role in the separation efficiency of electrons and holes and the reaction of hydrogen formation.

Keywords
Hydrogen; Ruthenium oxide; Sodium tantalum oxide; Glycerol

Topic
Chemical Engineering

Link: https://ifory.id/abstract/6UWXFL3p4fKP

Corresponding Author
Robbi Rahim

Institutions
a. School of Computer and Communication Engineering, Universiti Malaysia Perlis, Arau, Malaysia
b. Universitas Muhammadiyah Sidoarjo, Sidoarjo, Indonesia
c. Universitas 45 Surabaya, Indonesia
d. STMIK STIKOM Indonesia, Bali, Indonesia

Abstract
Key-based security is still the most widely used form of security today with a key distribution process between senders and receivers that is commonly perform and also it is a classic problem in cryptography where key must be share to other parties (sender or receiver) and its maybe known when third parties do sniffing process or man in the middle attack. Three-Pass Protocol is one solution that can be used to overcome the problem of key distribution, because the sender and receiver can encrypt and decrypt without need to exchange keys. Security in Three-Pass Protocol uses XOR logic so that the resulting ciphertext will be very easy to decrypt by those who are not responsible, to improve data security in the Three-Pass Protocol process which is use Caesar Cipher and Vigenere Cipher algorithms in the encryption and decryption process in the Pass Protocol scheme, and ciphertext encryption results are quite difficult to read and require a long time to decrypt them.

Keywords
Distribution Key, Security, Three-Pass Protocol, XOR Encryption

Topic
Computer Science

Link: https://ifory.id/abstract/MBTpbjakX2q4

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
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
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
Diana Vivanti Sigit

Institutions
Biology Education Program, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta, Indonesia

*Corresponding author: dianav[at]unj.ac.id

Abstract
Environmental Literacy was the ability to interpret and take appropriate action on environmental systems that purpose to maintain, restore and improve the environment. This study aimed to determine the environmental literacy level of biology undergraduate students. The method was used a descriptive method. The three aspects of environmental literacy were cognitive, affective, and action. Data were obtained from 197 undergraduate students on biology science and biology education departments taken from 5 universities in DKI Jakarta. The result showed that the level of environmental literacy was in a very good category in which the cognitive aspects were the highest. Biology undergraduate students were good in the environment understanding but were still poor in the affective and action aspects. Based on the departments, the environmental literacy of students from biology science was higher than students from biology education. Based on gender, the female was higher in environmental literacy than male. In conclusion, the Biology undergraduate students environmental literacy varies from some aspects. This research recommended that institution has an important role to enhance the student environmental literacy, therefore, a student might increase the affective and the action of environmental literacy.

Keywords
Biology undergraduate student, education, environmental literacy, environmental quality

Topic
Biology

Link: https://ifory.id/abstract/eV6cHkFXUjan

Corresponding Author
Ratmiati Ratmiati

Institutions
a) Sekolah Pascasarjana,Universitas Pendidikan Indonesia, Jln. Dr. Setiabudhi no. 229, Bandung, Indonesia.
Ratmiati_18[at]upi.edu
b) Fakultas penddidikan Bahasa dan Sastra, Universitas Pedidikan Indonesia, Bandung, Indonesia

Abstract
The purpose of this research is to explore the application of a model of learning based on environmental problems and use media handphone in learning exposition text. The type of study is quantitative research. The method used in this study is the experimental method. The research design in this study was pretty-postest group design. The sample in this study was 8th-grade junior high school students amounting to 33 people. The result showed that the students- writing skill improved much better with the application of learning model based on environmental problems aided by the presence of handphone technology in supporting the process of observing students in gathering material in writing exposition text. Based on the results of the pretest and posttest, it was done showing an increase in the value of students in writing exposition text about environmental problems observed around them. With this study, learning, it can be concluded that students ability two write exposition text with the existence of environment-based on the learning model is at a level very good.

Keywords
Environmental Problem Based Learning; expostion text

Topic
Environmental Engineering

Link: https://ifory.id/abstract/wg68bpAnUBrY

Corresponding Author
Abdul Kholiq

Institutions
(a)Department of Educational Psychology and Guidance, Universitas Pendidikan Indonesia, West Java, Indonesia

(b)Science Education Department, Postgraduate School Universitas Pendidikan Indonesia, Jl. Setiabudi no 229, 40154, Bandung, Indonesia

Abstract
This study aims to determine the effect of epigenetic changes on differences in human behaviour. To support the research, researchers used the ex post facto method to 7 people from 7 provinces that varied their life experiences. The results show that epigenetic changes encourage neuron function so that human behaviour changes. Human behaviour is modified by epigenetic processes, namely the more experience in the past, human behaviour is more adaptive to lifes problems. This is due to the response process of neuroendocrine in dealing with stress which makes individuals more able to reduce stress by releasing the hormone corticosterone. In short, experience in dealing with problems makes people more mature in behaving

Keywords
Epigenetic changes, life experiences, human behaviour

Topic
Sample Topic

Link: https://ifory.id/abstract/gFwAHzQc8PG2

Corresponding Author
Riza Apriani

Institutions
a) Chemistry, Faculty of Mathematics and Natural Science, Universitas Garut
Jalan Jati No. 48B, Garut 44151, Indonesia
*aprianiriza[at]uniga.ac.id
b) Chemistry Department, Faculty of Mathematics and Natural Science, Universitas Padjadjaran
Jalan Raya Bandung-Sumedang Km. 21, Jatinangor 45363, Indonesia

Abstract
Cancer is a frightful disease and represents one of the biggest health-care issues for the human race and demands a proactive strategy for cure. Exploration of natural product containing anticancer agent provide a promising line for research on cancer. Moringa plant (Moringa oleifera) is one of the medicinal plants used in traditional medicine for the treatment of cancer. Several studies have reported that water and alcoholic leaves extracts of M. oleifera have anticancer activity in some cancer cell line, including HepG2 liver cancer cells, A549 lung cancer cells, Caco-2 colon cancer cells and MDA-MB-231 breast cancer cells, but study on T47D breast cancer cells has not reported yet. Therefore, this study was carried out to investigate the cytotoxic activity of ethyl acetat fraction of M. oleifera (EMO) on T47D cells by observing cell cycle profile. Cytotoxic activity was determined by MTT assay. Cell cycle analysis was performed using flow cytometry and cyclin D1 expression was analyzed using immunocytochemistry method. Based on preliminary MTT assay, T47D treated with EMO demonstrated a medium cytotoxic effect with an IC50 value of 135.312 ug/mL. Further assay indicated that EMO induced cell cycle arrest on G0/G1 phases. Immunocytochemistry assay showed that the EMO decreased expression of cyclin D1.

Keywords
Breast cancer, cell cycle, Moringa oleifera, T47D cell

Topic
Chemistry

Link: https://ifory.id/abstract/pfzYrkdue7XP

Corresponding Author
Sri Rahayu

Institutions
Universitas Negeri Jakarta

Abstract
Euchresta horsfieldii (Lesch.) Benn is one of the medicinal plants that grows in the highland forests of Bali. This plant is believed by the community as a powerful aphrodisiac. The study was begun with the collection of Euchresta horsfieldii (Lesch.) Leaf samples which will be extracted by maceration method. Three types of solvents were used in maceration namely aquades, 70% ethanol, and chloroform. Phytochemical screening includes testing of alkaloids, flavonoids, triterpenoids, steroids, phenolics, tannins, and saponins. The purpose of this study was to prove the effect of crude extract of Euchresta horsfieldii (Lesch.) leaves as aphrodisiac on the mounting behavior of male mice. The test parameters in this study are phytochemical screening and mounting behavior which consists of introducing, climbing, and coitus. The research design used was a completely randomized design (CRD) with two treatment groups and eight replications for eight days. The data obtained was analyzed through t test. Phytochemical screening results showed that 70% ethanol has the best ability to bind secondary metabolites in leaf samples, so that the extract with this solvent was tested in vivo on male mice. Based on observations on mounting behavior, it was shown that the crude extract of Euchresta horsfieldii leaves had no effect on the increase in frequency of mounting behavior of male mice in both the acute and chronic phases

Keywords
Euchresta horsfieldii (Lesch.) Benn, aphrodisiac, mounting behavior, male mice

Topic
Biology

Link: https://ifory.id/abstract/f6ubqWQaMjrH

Corresponding Author
ARNELIA DWI YASA

Institutions
a)Elementary School Teacher Education Study Program, Universitas Kanjuruhan Malang
Jl. S. Supriadi No.48, Malang 65148, Indonesia
*arnelia[at]unikama.ac.id
b) Faculty of engineering, University of Muhammadiyah Malang, Indonesia
Jl. Tlogo Mas No.246, Malang, Indonesia

Abstract
Assessment teaching performance is an essential factor to increase learning quality. It is a critical aspect in strengthening the management of the elementary school. This article aims to assess teaching performance in elementary school. ICT support is one of some criteria assessment. Integration AHP and SAW is proposed to evaluate teaching performance. In the evaluation, the AHP method is used to weight the criteria and sub. SAW is used to assess teaching performance from the school based on criteria and sub-criteria. A case study was also done to illustrate the problem. Using AHP and SAW, the assessment of evaluation teaching results more objective, accurate, and scientific. It is expected that these tools serve as a tool for improving performance in elementary school.

Keywords
Evaluating Teaching Performance; Elementary School; AHP; SAW

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/YZRMk3UBQvzE

Corresponding Author
Anak Agung Ayu Putri Ardyanti

Institutions
STMIK Primakara
Jalan Tukad Badung No 135 Denpasar Bali
putri.ardyanti[at]primakara.ac.id

Abstract
The rapid increase from the industrial revolution 4.0, affected changes in business patterns in Indonesia, including Bali. This research aims about how to create digital business with Lean Startup Machines and Questionnaire User Experience method (UEQ). This business originated from the fact that women workers in Bali had difficulty to buy traditional ceremonial equipment. We had to research almost one year from the customer and market before built the application. First at all, we must concept design of website. Lean startup model is designed to minimize the risk of returns from products made for market needs. One of tools in this method for customer validation is the validation board. From the research obtained from the core assumptions to survey directly prospective customers for the minimum success criteria that are required. This research had 70% of success required which up to 3 times for the pivot. While the results of the Questionnaire User Experience method (UEQ) the opinion of the community about the system that had made get the overall average impression of Attractiveness (1.71), Persicuity (1.35), Efficiensy (2.66), Dependability (0.92), Stimulation (1.28) dan Novelty (0.69).

Keywords
Startup, Bali, I-Canang, UEQ, Lean Startup Machine

Topic
Information Engineering

Link: https://ifory.id/abstract/RXh2MzVUrdqp

Corresponding Author
Elsa Lisanti

Institutions
1 Universitas Negeri Jakarta (UNJ) Department of Biology, Faculty of Mathematics and Natural Sciences, Kampus A, Gedung Hasjim Asjarie Lt. 9. Jl. Rawamangun Muka Jakarta Timur, 13220, Indonesia

2 Center Application Isotopes and Radiation (CAIR), National Nuclear Energy Agency of Indonesia, Jalan Lebak Bulus Raya No. 49 Jakarta Selatan, Indonesia

Abstract
Introduction : The present study was carried out to evaluate of antihyperglycemia properties of ethanolic leaves and seed extracts of neem (Azadirachta indica A. Juss) on glucose level and body weight on mice induced alloxan. Methods : This experimental research uses DDY mice from BPOM Jakarta. The extract was tested on diabetic DDY mice induced by alloxan at a dose of 120 mg/kg bw intraperitoneal. There were 9 groups of treatment and 3 replications. Doses used for treating these mice were A. Normal mice + Aquadest (control), B. Diabetic mice + Aquadest, C. Diabetic mice + Glibenclamide, D. Diabetic mice + leaves extract of neem with doses 0,25 g/kg bw, E. Diabetic mice + leaves extract of neem with doses 0,50 g/kg bw, F. Diabetic mice + leaves extract of neem with doses 1,00 g/kg bw, G. Diabetic mice + seeds extract of neem with doses 0,25 g/kg bw, H. Diabetic mice + seeds extract of neem with doses 0,50 g/kg bw, I. Diabetic mice + seeds extract of neem with doses 1,00 g/kg bw. All of treatments were given orally for 21 days. Glucose levels were calculated from the 1st week to 11th week and body weights were calculated from the 1st week to 7th week. The data were analyzed by ANOVA and LSD tests to compare groups A-I. Result : the research showed that the ethanol extract of leaves at a dose of 1,00 g/kg bw decreased glucose level of alloxan mice. There were highly significant differences (P<0,05) between group control and treatment. Based on the data analysis of body weight, there was no significant difference between group control and treatment. Conclusion : Ethanol extract of leaves and seeds extract of neem can be used to treat antihyperglycemia on mice induced alloxan.

Keywords
antihyperglycemia, leaves and seeds, neem, ethanolic, mice

Topic
Biology

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

Corresponding Author
Ratnaningsih Ratnaningsih

Institutions
Environmental Engineering Departement, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jakarta, Indonesia

Abstract
Abstract. Cibinong WTP using raw water sources from the Ciliwung River. Processed water from the Cibinong WTP serves 5 sub-districts, namely, Tajur Halang District, Bojong Gede, Cibinong, Babakan Madang and Citereup. The research covered raw water quality, evaluation of the existing installaition condition and optimization of work of operation unit and installation process. Cibinong IPA uses unit intake, hydraulic coagulation, hydraulic flocculation, sedimentation plate settler, rapid sand filtration, and ground reservoir. The coagulant used is 1% alum with a dose of 25 mg / L and disinfectants that use liquid gas and chlorine at a dose of 2 mg / L. Specifications for installation of drinking water installations use standards that are in accordance with SNI 6774 in 2008 concerning procedures for processing plant package units. water and water quality in accordance with the Minister of Health Regulation 492 of 2010 concerning drinking water quality requirements. CibinongWTP has several units that have not met the 2008 SNI 6774 standard but, the quality of the water already in accordance with the regulation of Minister of health no 492/2010.

Keywords
Water treatment plant, Performance Evaluation, Ciliwung river

Topic
Environmental Engineering

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

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering, Faculty of Earh Technology and Energy, UniversitasTrisakti, Jakarta

Abstract
In drilling operation there are two important matters that must be considered, which are the pumps and drillingfluid rheologythat are influencing hydraulics drilling system.The major function of drilling fluid is to lift the drill cutting to the surface and still maintain the drilling hole to avoid an encounter.Evaluation of hydraulics drilling for bottom hole cleaningwill count theparameter successwhich influence in removal of cutting to the surface for bottom hole cleaning and optimization drilling calculation hydraulics. The velocity of drilling fluid in annular, the flow that is formed and the ability of bottom hole cleaning are highly influenced by specifications of mud pump as a resource power for mud to flowthat also will determine how the value of flow rate can be circulated.Mud rheology,PV, YP and MWwill influence the performance of mud to carry cutting on drilling operation. The success of the bottom hole cleaning of drilling wells evaluated based on the calculation of hydraulics drilling at every depth and inclination changes while also review the parameters of Cutting Transport Ratio (Ft), Cutting Concentration (Ca), Cutting Carrying Index (CCI), Particle Bed Index (PBI) andoptimizatio of hydraulics drilling system. Q optimum is very influential on the value of bit hydraulic horse power (BHHP) and surface horse power (HPS) that provide more optimized power to pump the mud withminimize the effect of pressure loss.

Keywords
Bit hydraulic horse power, Surface Horse Power, Pressure Loss, Cutting Removal

Topic
Material Engineering

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

Corresponding Author
Soeprijanto Soeprijanto

Institutions
a) Faculty of Engineering, Universitas Negeri Jakarta, Jakarta, Indonesia
*prijanto.unj[at]gmail.com
b)yusupyfy[at]gmail.com
c)ermimedia[at]yahoo.com

Abstract
This study aims to determine the level of feasibility of practical facilities and equipment in the Private Vocational Middle School Electrical Engineering Expertise Program in the East Jakarta environment. The research method used is the method of achievement (qualitative and quantitative) using the program gap evaluation model (Discrepancy Evaluation Model). The problem raised in this research is the extent to which the feasibility of space and equipment in the practice of electric power installation in private Vocational Schools in the East Jakarta region is seen from the Standards of Facilities and Infrastructure of Indonesian Vocational High School Permendikbud Number 34 of 2018. The research samples were 4 schools, determination Sample schools are conducted by proportional random sampling. The research was conducted in the 2017/2018 school year. The results showed that: (1) All (100%, N = 4) sample schools had a facility to install electricity in the form of instructional space and practice space in conditions worthy. (2) all (100%, N = 4) sample schools did not have a Basic Electrical Engineering laboratory. (3) When viewed from the standards of the Vocational Middle School practice equipment available in the basic installation practice room for Electric Power, in all (100%, N = 4) sample schools were inadequate. Conclusion This study shows that private Vocational High Schools in East Jakarta already have practice principles. Electric power is in the form of instructor rooms and practicum rooms, but it is not supported by adequate practical equipment. The implication of this study is that private vocational schools in the East Jakarta environment need to meet the additional power plant installation equipment according to standard facilities according to Minister of Education and Culture number 34 of 2018.

Keywords
practice tools, electric power installation, private vocational high school

Topic
Electrical Engineering

Link: https://ifory.id/abstract/bNd8UzDVyrHj

Corresponding Author
Een Sumarni

Institutions
Universitas Pendidikan Indonesia
Sekolah Pascasarjana
Departemen Pendidikan Olahraga

Abstract
The purpose of this study was to evaluate the soccer school curriculum in the city of Bandung. This research method is evaluative research using the CIPP model (Context, Input, Process, Product). Context aspect consists of: soccer school curriculum foundation, soccer school establishment permit, relevance of soccer school curriculum objectives with school vision and mission. Input aspect consists of: availability of management, availability of infrastructure, suitability of human resources, suitability of financing. Proccess aspect consists of: the implementation of the training method, the implementation of the training process, the implementation of the training schedule and time, and the trainers role during the exercise. Product aspect consists of: suitability of the rating system, suitability of achievement, absorption of graduates, availability of graduate certificates. This research was conducted in the soccer school of Bandung City, the sampling technique used was purposive sampling. The research instrument used questionnaires, interviews and documentation. Questionnaires and interviews were given to school principals, teachers, students and parents. Quantitative data analysis using T-scores and interpreted into the Glickmann quadrant.

Keywords
Curriculum Evaluation, Soccer School, CIPP Model

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/UK7T8gtJjmzp

Corresponding Author
BAMBANG HERU ISWANTO

Institutions
Department of Physics, Universitas Negeri Jakarta, Jakarta 13220, Indonesia

Abstract
In the supervised machine learning framework sufficient labeled data are needed to achieve satisfying performance. In many domains, however, the labeled data are often expensive to obtain and requires laborious human effort. In this paper, we propose a query technique by introduce the expected log-likelihood as a criterion to minimize the training data in active machine learning framework. In this scenario, the expected log-likelihood is calculated for all unlabeled data points then an instant with highest value is chosen to be labeled. Some experiments were conducted to test the effectiveness of the method using the Gaussian mixture model classifiers with different number of kernels for each class. The method was applied on a training and test data set generated from the two normal distributions with the same proportion for each class. The result of the experiments using the proposed method show a significant reducing of the labeled data compared with the passive learning method. On the data set, the passive learning reached an error rate of 4.50% after 81 queries, meanwhile the same error was reached after 36 queries by the active learning technique or 1,25 times faster than passive learning.

Keywords
supervised learning, active learning, Gaussian mixture models, log-likelihood, classification

Topic
Computer Science

Link: https://ifory.id/abstract/x9EacJfhwD3V

Corresponding Author
Hamdani Umar

Institutions
(a) Department of Physics Education, Faculty of Teaching and Education, Universitas Samudra, Kota Langsa, 24416, Indonesia
(b) Department of Mechanical Engineering, Faculty of Engineering, Universitas Samudra, Kota Langsa, 24416, Indonesia
(*) hamumar84[at]gmail.com

Abstract
Gayo Lues is a regency in Aceh Province well known as a producing center for citronella, cymbopogon nardus. Today, the area of production reaches around 34,000 hectares managed by more than 2000 households. Until now, citronella oil was collected by the community through simple extraction technology and has not been able to improve the earnings of farmers. In this study, an experimental study of extraction of citronella essential oil has been carried out using a steam distillation system. The scope of this study is to optimize the extraction process of citronella essential oil using a steam distillation system. The process variables evaluated in this study comprise the extraction time and the nature of raw material (wet or dry). The results confirmed that there was a significant effect of extraction time proceeding the amount of oil produced whereas pressure and raw material requirements strongly influence oil quality. The results of this investigation could secure necessary information for the citronella farmers in Gayo Lues to develop better quality and value of the essential oil product.

Keywords
Citronella essential oil. Steam distillation. Energy. Mass transfer.

Topic
Physics

Link: https://ifory.id/abstract/KDa2ZrcFEuez

Corresponding Author
Khairul Anam

Institutions
a) Mechanical Engineering Department, Brawijaya University
Jl. MT Haryono 167, Malang 65145, Indonesia
*khairul.anam27[at]ub.ac.id

Abstract
The tensile strength of rubber sap additive with different NaOH concentration was studied on the wood surfaces. The adhesives were cured at room temperature for different curing times (3, 6, and 12 hour) with NaOH concentrations of 0 wt%, 5 wt%, and 10 wt%. The results shown that the tensile strength of the adhesive joint increased when the NaOH concentrations and curing times is increasing. This evidence can be easily explained by investigating the water content in the adhesive. The highest tensile strength of 0.259 MPa occurred when the NaOH concentrations and curring time of 5 wt% and 12 hours, respectively. However, this value is remained low compare to synthetic adhesives. In addition, from images of adhesives after breaking of samples, the failure mode of the adhesive joint is dominated by adhesive failure.

Keywords
Tensile strength; Rubber sap adhesive; NaOH; Curing time

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/cbLFCE26tTDu

Corresponding Author
Gatot Supriyanto

Institutions
UPI Bandung

Abstract
The utilization of information technology and communications (ICT) in services are widely applied in the students career guidance activities, in addition to improving accessibility for students in getting ICT usage information can also be used as a reference system that acts like an expert skilled in the art that supports decision-making and is known as the expert system. Utilization of expert systems in career guidance counseling students to cover all aspects of education, evaluation of education, academic career guidance and vocational guidance.The focus of the review and assessment adopted in this article is intended to uncover and analyze the results of research related to the impact of the application of expert system in advising students on aspects of educational guidance, educational evaluation and aspects of career guidance academic and vocational guidance as well as to determine the trend of research opportunities the future in respect of the application of expert systems in career guidance of students. Overall, the findings of the review on the topics and sub-topics that were analyzed showed that the implementation of an expert system in educational guidance greatly assist students in achieving: keberhasilan learning, specialization training, student performance, achievement and self-evaluation. While the findings of the analysis of the topic and sub-topic on the implementation of career guidance expert system showed that the implementation of an expert system greatly assist students in determining and aligning academic majors selection with his career choice. Remember they still lack the development of expert systems in the implementation of career guidance range wider, so it will need a sustainable development in the implementation of students career guidance expert system, especially in considering the factor of uncertainty a rising from both the application and its factors.

Keywords
Career guidance, student, expert systems, education

Topic
Computer Science

Link: https://ifory.id/abstract/kCEWePH6hy3G