Indonesia Conference Directory

Corresponding Author
Putu Indah Budi Apsari

Institutions
Faculty of medicine and Health Sciences, Warmadewa University

Abstract
Tuberculosis (TB) and malnutrition are the main causes of morbidity and mortality among children in developing countries. Tuberculosis become worse if there are present of malnutrition. In contrary, malnutrition can be caused by chronic inflammatory disease such as TB. This study aimed to analyze the correlation between tuberculosis and nutritional status among children in North Lombok, West Nusa Tenggara, Indonesia. This cross sectional study recruited child TB aged under 18 years as participants. TB was diagnosed by TB scoring in Children, Tuberculin Test, Fine Needle Aspiration Biopsy (FNAB) and Thorax Photos, and nutritional status was assessed using Center for Disease Control and Prevention (CDC) chart. Total 130 children were identified, 65 children with TB and 65 healthy children as control. This study showed that pulmonary TB was present in 72.3% of case, Lymphadenitis TB was 16%, and mixed pulmonary and lymphadenitis TB were 2%. Under-nutrition child was found in 63.1% of cases, malnutrition child was found in 29.2% of cases. There was significant correlation between tuberculosis and malnutrition among children (p<0.05). The highest proportion of TB was in children under five years (52.3%). TB is strongly correlated with malnutrition among children.

Keywords
malnutrition, tuberculosis, children

Topic
Biology

Link: https://ifory.id/abstract/C8RDuYcPWHxK

Corresponding Author
Putu Indah Budi Apsari

Institutions
faculty of medicine and health sciences, warmadewa University

Abstract
Cognitive, motoric and language aspect of HIV children is an important issue that affect developmental milestone and quality of life. The effect of HIV infection on cognitive function remains unclear. This study aimed to assess correlation of cognitive scores with CD4 among HIV child in Paediatric polyclinic Sanglah Hospital, Bali. This cross sectional study recruited 68 HIV child age 0-36 months old as participants. Cognitive score was assessed using CAT/CLAMS scores, HIV status was obtained from medical record. The result showed average of CD4 among subject was 29.85 cells/mm3, there was positive correlation between CAT scores with CD4 count (r = 0.33, p = 0.006) and also between CLAMS scores with CD4 count (r = 0.307, p = 0.01). It can be concluded CD4 count correlated with cognitive scores on HIV child.

Keywords
HIV child, cognitive score, CAT/CLAMS

Topic
Biology

Link: https://ifory.id/abstract/JnqYe6My24hf

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
Purwanto Purwanto

Institutions
a) Departement Law Faculty of Law at Universitas Panca Bhakti Pontianak, Indonesia
b) Department Management at Universitas Panca Bhakti, Pontianak, Indonesia
Jl Kom Yos Sudarso, Pontianak, Indonesia
cUniversitas Wijaya Kusuma Surabaya
Jln. Dukuh Kupang XXV/54 Surabaya

Abstract
The purpose of this research analyzed free investment ideology characteristic from democracy economy context, and increasingly neo-liberal economy mainstream, was made legal instrument that regulate in management investment of palm oil plantation by Internet Communications Technology (ICT) based learning. The method used quantitative research, the independent variables consisting of regulation comply (X1), accountability (X2), and CSR (X3), and the dependent variable is profitability (Y), data analysis used multiple regression with testing validity, reliability, performs tests of normality, multicollinearity, autocorrelation, heterokedacity, and ICT based learning used Action Research (AR). The results showed three independent variables are significant with the regression equation Y = 2,012 + 0,326X1 + 0,311X2 + 0,375X3 + e, and sig value X1= 0,043 , X2= 0,023 , and X3= 0,038. Palm oil plantation management with community through regulation comply, accountability and support through CSR increase profitability, and the implementation of ICT based learning showed that the achievement on stock underpricing subjects. Average student learning outcomes before the action amounted to 65.21, after the first cycle the action applied to increased 80.12. In the second cycle increased to 86.89, finding this research is the application of ICT based learning can improve learning achievement stock underpricing subjects.

Keywords
Underpricing; Underwriter, Auditor, Profitability, Company Size

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/NVzWJBFLfhr3

Corresponding Author
Yulilina Retno

Institutions
Universitas Negeri Jakarta
email: yulilinaretno[at]yahoo.co.id

Abstract
The main gynecological problems among women, especially adolescents, are disorders of the menstrual cycle. Menstruation is the decay of the uterine wall which causes bleeding that is influenced by hormones, occurs repeatedly and forms cycles. The menstrual cycle is influenced by hormonal, psychological factors such as anxiety, depression, and stress, and lifestyle such as nutrition and physical activity. This study aims to determine the positive relationship between physical activity and the menstrual cycle in female college students of Biology, Jakarta State University. The study was conducted at the Jakarta State University in October-November 2018. The method used was descriptive method with correlational studies. The number of research samples is 177 female college students. The prerequisite test results show that data were normally distributed and homogeneous. The results of hypothesis testing indicate there is a positive relationship between physical activity and the menstrual cycle, physical activity provides a considerable contribution to the menstrual cycle. The conclusion of this study is that there is a positive relationship between physical activity and the menstrual cycle.

Keywords
college student, menstrual cycle, physical activity

Topic
Biology

Link: https://ifory.id/abstract/e4ZUN8WqxrvB

Corresponding Author
Adiyath Randy Yudi Mamase

Institutions
a) Department Management at Universitas Panca Bhakti, Pontianak, Indonesia
Jl Kom Yos Sudarso, Pontianak, Indonesia
b) Department English Education at Universitas Wijaya Kusuma Surabaya, Indonesia
Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia

Abstract
The purpose of this research is to analyze correlation of underwriter, auditor, profitability and company size on stock underpricing by ICT based learning. The method used is quantitative research, the independent variables consisting of underwriter reputation (X1), auditor reputation (X2), profitability (X3) and company size (X4), and the dependent variable was underpricing (Y). Data analysis used multiple regression which begins with testing validity and reliability and performs tests of normality, multicollinearity, autocorrelation, and ICT based learning used Action Research (AR). The results showed that the three independent variables X1, X2, X3 had a negative, and X4 had a positive towards the dependent variable Y with the regression equation Y = 29.760 – 10.011X1 – 11.812X2 – 0.512X3 + 0.366X4 + e and sig value X1= 0.040, X2= 0.103, X3= 0.079 and X4= 0.750. Underwriter has influence toward stock underpricing and a good performance, implementation of ICT based learning in the subjects of stock underpricing, showed an increase in average student learning outcomes in each cycle, average student learning outcomes before the action amounted to 68.81, the first cycle 79.70 and second cycle 88.00.

Keywords
Underpricing, Underwriter, Auditor, Company Size, Internet Communications Technology

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/jVQHgFe2nXtG

Corresponding Author
Martin Fatah

Institutions
(1) STT PLN, Jakarta, Indonesia,
(2) Wood Group Kenny, Jakarta, Indonesia
(3) Wood Group Kenny, Perth, Australia

Abstract
A pipeline in the seabed was successfully commissioned and had commenced production from the well. The pipeline has life time design for 20 years. However, a leakage from the flange connection was detected a couple months after start of production. The pipeline was isolated by closing the valves on the line tee, and shutdown the well production. This condition remains for 6 months before any remedial action taken. During that period, it is believed that there is any corrosion mechanism occurred which could reduce the pipeline integrity. The paper briefly described the corrosion threats and assessed the corrosion rate of the leakage pipeline with limited information of factors that affecting corrosion rate. Additionally, recommendations for preparation of the pipeline to minimize internal risks are given.

Keywords
pipeline, seabed, leakage, corrosion threats, corrosion mechanism

Topic
Material Engineering

Link: https://ifory.id/abstract/Bcm7AYEaVMpH

Corresponding Author
Yuli Rahmawati

Institutions
a Universitas Negeri Jakarta
Jl Rawamangun Muka, Jakarta Timur, Indonesia
*yrahmawati[at]unj.ac.id
b. Universitas Halu Oleo
Jalan Kampus Bumi Tridharma, Andunohu, Kambu, Kendari, Sulawesi Tenggara

Abstract
This study aimed to develop critical thinking skills through Culturally Responsive Teaching (CRT) approach and ethnochemistry of Tegal culture. The teaching approach is focusing on exploring the culture and local wisdom in Tegal Culture especially in Acid-Base such as Jamasan Tradition, Nginang, and Moci from chemistry perspectives integrated into CRT. The study employed the teaching model which consists of five phases of self-identification, cultural understanding, collaboration, critical reflections, and transformative construction. The study involved 35 students of year 11 in secondary school in Balapulang Tegal. The qualitative methodology approach has been employed with observation, interviews, critical thinking test, and reflective journals as data collection. The results showed that the integration of ethnochemistry in CRT approach has engaged students in developing their critical thinking skills in developing a conclusion, making the connection, conceptual understanding, and interpretation with the critical thinking skills test shows 40% students have reached level 3 (Satisfactory). In addition to the students engaged in the cultural identity empowerment, meaningful chemistry learning experiences, and team working. The students have been challenged in developing their critical thinking skills.

Keywords
chemistry learning, culturally responsive teaching, ethnochemistry, critical thinking skills, acid-base

Topic
Chemistry

Link: https://ifory.id/abstract/txk7pgUn9aCZ

Corresponding Author
Siva Hamdani

Institutions
Universitas Garut ; Badan Pengkajian dan Penerapan Teknologi; Universitas Padjadjaran; Universitas Garut

Abstract
Kiseueur (Antidesma tetrandrum blume) is an Indonesian native plant that is potential to developed to be an anticancer drug. This study aimed to determine the cytotoxic activities and apoptosis inducing mechanism of the extract and fraction of Kiseueur leaves and bark in breast cancer cell lines (MCF-7). Cytotoxic activity was carried out using the MTS assay. The expression of caspase 3 and caspase 9 pro-apoptotic proteins was observed by Western blot analysis.The results showed that the extract and fraction of Kiseueur leaves and bark had varied cytotoxic activities in breast cancer cell lines (MCF-7). Kiseueur bark extract had the strongest cytotoxic activity against MCF-7 cells with IC50 81.65 μg / mL. The extract of Kiseueur bark induced apoptotic mechanism through modulation of caspase 9 and caspase 3 protein expression.

Keywords
Cytotoxic activity, Apoptosis, MCF-7, Antidesma tetrandrum

Topic
Pharmacology

Link: https://ifory.id/abstract/BhCdPET6AfaD

Corresponding Author
Muhammad Farman Andrijasa

Institutions
Departement of Information Technology
State Polytechnic of Samarinda
Samarinda, Indonesia
andrijasa[at]polnes.ac.id

Abstract
Exchange currency rate becomes one of the most important things on country economic growth. In some countries, the rate may affect seriously to economic growth and political stability. Governments need to have some actions in order to stabilize the rate. Knowing the pattern of exchange currency rate is a mandatory by governments for determining their future policies or as consideration in future decision-making. Therefore, government needs an analysis tool for modeling the rate prediction. Our previous study emerged that using deep learning method with encoder-decoder architecture has succeeded to model the rate prediction with teacher forcing and give only a one-step prediction. In this study, the authors aim to predict the pattern of exchange rate using the previous method with zero input to decoder to obtain multiple time steps prediction. After training and testing over 4,344 daily data series of IDR to USD exchange currency rate over 17 years taken from Bank Indonesia official website, the result found that the method still showed an interesting model to predict the next 40 sequence data series of exchange rate. In conclusion, the proposed method can be utilized to tackle the others prediction problem and the resulted model can be applied as an analysis tool by government for predicting their rate for the coming months or years.

Keywords
Neural Network, Deep Learning, Prediction

Topic
Computer Science

Link: https://ifory.id/abstract/f3MDEjhy6aWF

Corresponding Author
Vivi Alvionita Sari

Institutions
1,2) Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember Surabaya

Abstract
Molasses, Stillage or vinasse and Spent wash (bottom product of distillation column) are large liquid wastes production in the bioethanol industry that contain high sulfur. The liquid wastes with high sulfur contain are dangerous if it discharges directly into the environment without pretreatment. For this reason, pretreatment is needed to reduced the sulfur concentration of liquid waste (molasses) using biofiltration method. The objective of this research is to eliminate the content of H2S or sulfur in the wastewater of the bioethanol industry (molasses) by using aerobic bacteria such as Acidithiobacillus thiooxidans dan Pseudomonas putida. The method of this experimental work used biofiltration which are attached on wood chips or bagasse packing by aerobic bacterial to form biofilms in the reactor. The process in this study was conducted in two steps. The first step was carried out by sulfur oxidizing bacteria such as Acidithiobacillus thiooxidans and Pseudomonas putida with a concentration of 10% and 20% (v/v) that growth on packing to form biofilms in the reactor for 13 days. Furthermore, as the second step the bacteria degraded H2S content of liquid waste with attached bacteria on packing for 15 days in biofiltration reactor. From the preliminary results of this study, reactor with 10% (v/v) A. thiooxidans on wood chips packing and 3% (v/v) concentration molasses waste can degraded H2S from 4.35 mg/L to 1.55 mg/L (64.37% removal efficiency) and for reactor with 20% (v/v) A. thiooxidans can degraded H2S from 4.35 mg/L to 1.16 mg/L (73.33% removal efficiency). Meanwhile, reactor with 10% (v/v) Pseudomonas putida can degraded H2S from 4.35 mg/L to 1.94 mg/L (55.40% removal efficiency) and for reactor with 20% (v/v) Pseudomonas putida can degraded H2S from 4.35 mg/L to 1.47 mg/L (66.21% removal efficiency).

Keywords
Acidithiobacillus thiooxidans, Biofiltration, Molasses, Pseudomonas putida, Wood chips

Topic
Chemical Engineering

Link: https://ifory.id/abstract/bT3NeEwaJ6HC

Corresponding Author
Arif Rahman

Institutions
Universitas Negeri Jakarta

Abstract
A Novel catalyst prepared from Indonesia bauxite was used as a catalyst for photo fenton degradation of methyl orange solution. This catalyst is more cheaper than Nafion-based catalyst and more greener than other synthesized catalysts. It is easily prepared from Indonesian natural resources. X-ray diffraction measurements provide structure and mineral compostion of bauxite, while XRF provides information on the composition of Fe by 18% by weight of bauxite mass. The presence of large amounts of Fe in bauxite acts as a catalyst in the decomposition of metyl orange. Testing of photo fenton activity to decompose metyl orange showed that indonesian bauxite had high catalytic activity, was able to decompose 99.4% metyl orange within 40 minutes on irradiation using an 8Watt UVC radiation source

Keywords
catalyst, photo fenton, bauxite

Topic
Chemistry

Link: https://ifory.id/abstract/AzBjJeXZqD7F

Corresponding Author
Astri Rinanti

Institutions
Universitas Trisakti

Abstract
Water hyacinth is a water weed that causes an imbalance of the ecosystem so it needs to be processed into a useful product. This research was conducted to convert water hyacinth as lignocellulose-containing biomass by utilizing Aspergillus fumigatus fungi as a biocatalyst. This study began with cultivation of Aspergillus fumigatus in Potato Dextrose Broth media and preparation of water hyacinth to 100 mesh in size. Pretreatment is done by using a variation of the ratio of fungi to biomass at 1: 1, 1: 5, and 1:10 and contact times 1, 3, and 5 days. Determination of lignin as a result of pretreatment was carried out by the Chesson method. The hydrolysis stage takes place after the pretreatment stage to get fermentable sugar. The sugar content is analyzed using the DNS method. In this study, it was found that the best reduction in lignin levels after pretreatment was 38.6% and produced sugar of 12.5 g/L. A fermentation process and further research is needed to determine the potential of water hyacinth as a raw material in the production of bioethanol.

Keywords
Eichhornia crassipes, Pretreatment, Hydrolysis, Aspergillus fumigatus

Topic
Environmental Engineering

Link: https://ifory.id/abstract/Fm9tyxBcLgvH

Corresponding Author
Ni Luh Putu Eka Kartika Sari

Institutions
(a)Medical Faculty, Warmadewa University, Denpasar Bali
(b)Wangaya Hospital Denpasar, Bali
(c)Eijkman Institute for Molecular Biology, Jakarta
(d)Centre for Disease Control and Prevention, Fort Collins, Colorado

Abstract
Incidence of dengue remains high in tropical and subtropical countries which makes dengue the most common arthropod-borne disease in the region. There is limited data on dengue virus serotype in Bali. This study aimed to assess clinical and virological characteristics of dengue patients in Bali. A cross sectional prospective study was conducted from September 2015 to August 2016. Clinical manifestations were obtained and viral RNA from patient sera were serotyped using conventional RT-PCR. One way Anova was used to compare the clinical manifestation within serotype. Of the 603 patients, 177 cases were confirmed as dengue positive and could be classified into four serotypes. DENV-1, DENV-2, DENV-3, DENV-4. The common clinical manifestations documented were malaise, nausea, anorexia, cephalgia, myalgia, vomiting, athralgia, abdominal pain, retroorbita pain and bleeding. The most prevalent symtoms of cephalgia, bleeding and adominal pain were with DENV-3 infection 63 (66.3%), 11 (11.6%) and 12 (12.6%) respectively. Clinical characteristics such as blood pressure, pulse, temperature, trombocyte, leucocyte, hematocrite and hemoglobin were recorded. Temperature was significantly high in DENV-3 (p 0.030)compared to other serotypes. From all the dengue serotypes that were detected, the most prevalent was DENV-3. There is no significant differences in the clinical manifestations among all serotypes except for high temperature in DENV-3 infection.

Keywords
dengue, serotype, clinical manifestation, Bali

Topic
Biology

Link: https://ifory.id/abstract/2wAmrZk8u7bR

Corresponding Author
Ayu Latifah

Institutions
Department of Informatics, Sekolah Tinggi Teknologi Garut, Jl. Mayor Syamsu No. 1, Garut, Indonesia
*ayulatifah[at]sttgarut.ac.id

Abstract
Hybrid underwater glider is a class from autonomous underwater vehicle (AUV) that the concept of a buoyancy-engine to drive the vehicle sinking or floating are integrated and propeller propulsion systems for variable motion. This kind of vehicle has multi-functionality that enables to maneuver with glider and AUV mode so that it is effective tool for oceanographic research. To represent the vehicle dynamic, the mathematical model base on newton-euler approach is designed as nonlinear equation that derive from forces and moment that acting from the vehicle design. For glider motion, buoyancy-engine and moving mass are coupled for working as input controller actuator, and there is controlling need to make the vehicle go to mission point in some depth for a mission. In this paper depth controller will be designed to make the vehicle stay on depth condition. PID controller are used for controller design, that the mathematical model are derived to linier model. Simulation on Simulink MATLAB are used to design the model and get vehicle dynamic respon. With vehicle characteristic for glider motion, desired waypoint obtained with PD control for moving mass in x-axes and P controller for buoyancy engine.

Keywords
HUG; AUV; Depth control; linear; PID

Topic
Electronics Engineering

Link: https://ifory.id/abstract/KdHV2x9DvgqM

Corresponding Author
Muh Abdul Latif

Institutions
Departemen Pendidikan Teknik Elektro, Fakultas Pendidikan Teknologi dan Kejuruan, Universitas Pendidikan Indonesia, Jln. Setiabudhi No. 229, Bandung, Indonesia

*muhabdullatif18[at]gmail.com

Abstract
The aim of this research to know how to create and test and want to know the advantages and disadvantages of automatic grain dryers. After doing the manufacture and testing obtained beam-shaped tool with dimensions of 50 x 20 x 40 cm, equipped tube dryer container, stirrer arm, artificial heating furnace, the blower along with air, motors, track spending and funnel as well as the brain using an Arduino Uno R3. The test results showed the water level sensor accuracy level of 0.2% and a temperature sensor in 0.28%. The drying time for drying grain from grain initial moisture content of 24.48% to 14% over 82 minutes. This tool can dry the grain faster, equipped with temperature regulation, as well as an LCD display that allows users to monitor during the drying process. However, this tool still leaves the grain after drying process and also an LCD display that allows users to monitor during the drying process. However, this tool still leaves the grain after drying process and also an LCD display that allows users to monitor during the drying process. However, this tool still leaves the grain after drying process.

Keywords
grain; moisture content; automatic grain dryers; Arduino Uno R3

Topic
Electronics Engineering

Link: https://ifory.id/abstract/YRw8KW3txDUH

Corresponding Author
Wisnu Uriawan

Institutions
Teknik Informatika, Fakultas Sains dan Teknologi
Universitas Islam Negeri Sunan Gunung Djati Bandung
Jl. A. H. Nasution 105, Bandung 40614 Indonesia

Abstract
Universities cannot be separated from the existence of assets owned, therefore an information system is needed that functions as a tool in the asset management process. Most asset management in the private university still using Spreadsheet besides that the management of its assets is also not centralized. These problems can be solved by creating a web-based asset management information system. The purpose of this study is to design and build an asset management information system at the Private University. The method used is straight line where this method is used for problems in calculating the depreciation of assets and knowing the useful life of the asset. This system can help private university administrative staff in managing assets and calculating asset value.

Keywords
Asset Management, Information System, Straight Line, Private University

Topic
Computer Science

Link: https://ifory.id/abstract/pfUBWVt6cR2Q

Corresponding Author
rahmad santoso

Institutions
State Polytechnic of Malang

Abstract
Radiant charger is a free energy device that can be applied to produce electricity. The terms free energy means that this equipment does not use fuel, such as fossil fuels to produce energy. This research aims to design and analyze a prototype of radiant charger using five coils and five neodymium permanent magnets. In this research, a primary battery is needed as a source to generate mechanical work to rotate the rotor, also a coil and transistor to charge a secondary battery before the primary battery runs out. The results of the design and testing of the device produced a rotor rotation of 1020 rpm at 346 volts.

Keywords
Radiant charger, free energy, magnet permanent

Topic
Electrical Engineering

Link: https://ifory.id/abstract/4ynRN7ULjXqt

Corresponding Author
yudhi darmawan

Institutions
Polytechnic State of Malang

Abstract
The analysis and design of the proposed antennas is designated for receiving voice signals from Radio in general are out-of-prominent antennas and smaller indoor antennas, In this research, the authors aim to design and analyze an antenna with a simple design, a small dimension efficient, very easy installation, cheap and meet the antenna characteristics to support the movement in combat training within the Army. The antenna to be discussed is a monopole antenna Arrays with a minimalist shape that works at frequencies between 350MHz sd 480MHz by adjusting the length of the horizontal elemental Active distance between the outer and inner to get the impedance matching. In order to obtain a unidirectional pattern, a metallic plane reflector is placed at a distance of about &

Keywords
nthena carachteristic, combat army, gain, wireless comunication

Topic
Information Engineering

Link: https://ifory.id/abstract/QpyWk7wPd2LK

Corresponding Author
Ratna Widyati

Institutions
Universitas Negeri Jakarta

Abstract
Classification is a data mining technique for a process of finding a model that explains or distinguishes a concept or class of data. The goal is to be able to estimate the class of an object whose class is unknown. Seeing the importance of education quality that must increase continuously, the study was conducted to evaluate the educational process in the department based on academic historical academic data which is used as input for which new and unknown classes of objects will be obtained. The level of competitiveness in entering a department in higher education is one of the things that becomes an assessment of department accreditation. Thus it is necessary to analyze how many students accepted into a department do not move to other department the following year. The analysis used C4.5 method and in the process used Rapidminer software to make decision trees. The results obtained an accuracy rate of around 80% with confussion matrix.

Keywords
classification, C4.5 method, confussion matrix

Topic
Computer Science

Link: https://ifory.id/abstract/uPZRK34B8FMG

Corresponding Author
Mutia Delina

Institutions
Department of Physics, Universitas Negeri Jakarta

Abstract
An equipment for an object motion analysis base on time measurement has successfully developed by use a micro processsor”arduwino” for time measurement. The micro processor as a time measurement is controlled by the output signal of photo diode. By means of this equipment was obtained the time measurement accuracy up to three decimal places. When this equipment used to measure the gravity acceleration in our laboratory by means free fall of an object we obtained the value of 9.8570.035 (m/s2) in ten times measurement. Another advantage of this equipment is to study the terminal velocity when an object move in liquid.

Keywords
motion quanties; micrpprocessor; photo diode; terminal velocity; liquid.

Topic
Electrical Engineering

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

Corresponding Author
winda setya

Institutions
a) Department of Physic Education, Faculty Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung
Jl. Soekarno-Hatta no. 750, Gedebage, Bandung
*suratwindasetya[at]uinsgd.ac.id

Abstract
Light Dependent Resistance (LDR) is one type of resistor whose resistance value is influenced by the intensity of light received by it. This study aims to measure the amount of resistance in each color of light measured in the LDR. The research method is carried out by making a measurement device in which a light source that is parallel to the LDR is placed, between which a color layer is inserted which will change the white light from the lamp to the color light according to the color layer used. Variation in the distance (x) between lights and LDR causes greater resistance. The results of this study indicate that when the distance of 0.52 m the amount of red resistance is 44000 ± 0.5 Ω with an error 0.00114%, yellow 48300 ± 0.5 Ω with an error 0.00114%, green 96120 ± 26.29 Ω with an error 0.02735%, blue 114910 ± 10.54 Ω with error 0.00917 %, purple 129150 ± 47.79 Ω with an error of 0.037%. These results show an inversely proportional between resistance and light intensity.

Keywords
Resistor, Light Dependent Resistance, Light Intensity, Development, Measurement

Topic
Physics

Link: https://ifory.id/abstract/VTQWGuEb3pvm

Corresponding Author
Hamdani Umar

Institutions
(a) Agrotechnology Department, Faculty of Agriculture, Universitas Samudra, Kota Langsa, 24416 Indonesia
(b) Mechanical Engineering Department, Faculty of Engineering, Universitas Samudra, Kota Langsa, 24416 Indonesia
(c) Mechanical Engineering Department, Faculty of Engineering, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia
(*) hamdani[at]unsyiah.ac.id

Abstract
In the dry season, water supply for agriculture is minimal. Farmers usually use fresh water from a local well to irrigate agricultural areas. Farmers who have relatively adequate capital, irrigate their agricultural areas using high-energy pumping systems to maintain the quality and amount of their farming products. However, in line with the increasing price of energy in the market, the pumping system - which is commonly carried out on remote agricultural areas that are relatively far from the electricity network - has caused a significant increase in the cost of fuel oil. Therefore efforts to utilize renewable energy available in such agricultural areas need to be encouraged. In this study, the design, the installation, and testing of the performance of the Solar-Wind Hybrid Power Plant (S/W-HPP) have been carried out. This system consists of a 100 WP solar power plant, and a 500-watt wind-turbine power plant module as the primary energy source for drip irrigation pumps in an area of 1,000 m2 of food crops. Performance testing of the S/W-HPP system is carried out by proffering the submersible pump a workload at a flow capacity of 60 litres/minute with 60 watts of electric power. The results from field test performance, then, compared with the simulation results. The final analysis will provide fundamental information in the design of the S/W-HPP generating system in drip irrigation applications.

Keywords
Hybrid energy, solar energy, wind energy, water pumps, agricultural areas

Topic
Mechanical Engineering

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

Corresponding Author
Yuri Ariyanto

Institutions
State Polytechnic of Malang

Abstract
In this digital era the usage of locks are no longer only relies on traditional key systems, but also relies on usage of electronic sensors that can improve security system. Raspberry pi is a mini computer that can be used for various needs. In this research utilizing a raspberry pi and a servo motor as a locking device, a web server as a data storage center, a mobile device software aplication as a user interface.The password will be sent over internet from mobile device to web server and raspberry pi will give a command to the servo to unlock and lock. Now the threat to keyless locking system does not only come from physical sources but also come from non-physical or digital sources. This treat can be prevented by using cryptography to hide digital data in the system. This study will compare between combination of RSA, 3DES, AES 128 bit, and 256bit AES algorithms to obtain an algorithm that could be operated optimally on the system based on encryption and decryption speed. The final result of this study is a method to implement cryptographic algorithms on smart key systems to obtain better security.

Keywords
Raspberry Pi, Cryptography, AES, RSA, Security, IoT

Topic
Computer Science

Link: https://ifory.id/abstract/63fkGtZyUmvF

Corresponding Author
Eki Ahmad Zaki Hamidi

Institutions
(a) Electrical Engineering Department, UIN Sunan Gunung Djati Bandung
Jl. AH. Nasution 105 Bandung 40614 Indonesia
(b) LEN Industri
Jl. Soekarno Hatta 442 Bandung 40254, Indonesia

Abstract
Nowadays in Indonesia, 3D Radar has been developed to perform a vertical scanning that has multi-functional benefit in telecommunication industry and defense. As a common practice 3D radar system frequently used to measure the distance of an object like the aircraft. Therefore, the most important element in radar systems is the phase shifter that has main role to steering the beam and replace the rotator function. This final research will focus on the operation of simple Phase Shifter with concern on 2,9 GHz to 3,1 GHz radar frequency.

Keywords
Beam-steering, Microstrip, Phase Shifter.

Topic
Electrical Engineering

Link: https://ifory.id/abstract/uDxH2QLyfrpY

Corresponding Author
Asri Mulyani

Institutions
Department of Informatics, Sekolah Tinggi Teknologi Garut, Jalan Mayor Syamsu 1, Garut, Indonesia
*asrimulyani[at]sttgarut.ac.id

Abstract
The development of smartphone application technology makes it easier for people to obtain information without being limited by space and time. One of them is the development of an Android smartphone-based culinary information system application that allows culinary information to be accessed anywhere and anytime online with the hope that it can be utilized in the field of marketing and promotion to increase sales and revenue. This article aims to design an Android-based culinary information system application to make it easier to provide culinary information to the public. The methodology used is a multimedia development life cycle with stages covering, concept, design, collecting, assembly, testing, and distribution materials. The results of this study are in the form of android-based culinary information applications. Contributions given by this application can provide typical culinary information from various regions, especially in Indonesia.

Keywords
information system; culinary; multimedia; android

Topic
Information Engineering

Link: https://ifory.id/abstract/cXL47NfpUMyd

Corresponding Author
Khaerul Manaf

Institutions
1)Department of Informatics, Faculty of Science and Technology State Islamic University Sunan Gunung Djati Bandung, Indonesia.
*khaerulmanaf[at]uinsgd.ac.id

Abstract
Game education is a game in which there are elements that can be honed and education can increase knowledge, whereas that is a game of puzzle construction through post or to match an object sehinggan into certain patterns. Fisher yates shuffle algorithm is a randomization technique where the algorithm is implemented on a puzzle piece, so the puzzle pieces out will be different and menghasikkan without repetition and duplication. In this study it can be concluded that the fisher yates shuffle algorithm capable of determining a solution that does not double randomization and not repetitive. Based on testing pretest and posttest educational puzzle game is able to enhance students knowledge of early childhood education as much as 23.68% which results pretest posttest 64.13% and 87.81% results

Keywords
educational games, puzzles, fisher yates, android apps

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/D3XnjhRAbP2w

Corresponding Author
Sari Sari

Institutions
1,2,3 Prodi Pendidikan Kimia Universitas Islam Negeri Sunan Gunung Djati Jl. A.H. Nasution No. 105, Bandung 40614, Indonesia

Abstract
This study uses the stages of the Research Based Design method to produce an educational game oriented to chemical literacy on petroleum material. This research is driven by the importance of a visual learning media in order to improve the ability of chemical literacy in petroleum material so that students can connect between knowledge of concepts and phenomena that occur. The aim of the study is to describe the appearance of educational games oriented to chemical literacy on petroleum material. Based on the results of the study, it is obtained that the chemical literacy oriented educational game products in the form of chemical monopolies and chemical energy ladders which have characteristics such as game rules that modify the monopoly and snake ladders games equipped with questions oriented to chemical literacy, obstacles in the games show the levels of difficulty and levels of thinking as well as different visualizations that illustrate the context and application of petroleum.

Keywords
educational games, chemical literacy,petroleum material

Topic
Chemistry

Link: https://ifory.id/abstract/c6pwPGXBMzaK

Corresponding Author
Esa Firmansyah

Institutions
(*) esa[at]if.uinsgd.ac.id
(a) Department of Informatics, UIN Sunan Gunung Djati Bandung

Abstract
Excess or lack of nutrients that contained in food will cause a problems in the body. To solve this problem easily, a computerized system is needed that can provide some advice on the amount and type of food that needed to be consumed. The aim of this study is to design an expert system which addresses individual diet based on calorie activities and body needs. This study uses the Prototype as software development methodology and Data Flow Diagram (DFD) as software model. This expert system uses a harmony search algorithm to determine the amount of food with Harris-Benedict formula to calculate the bodys calorie needs. The results of functionality system testing and based on the assessment of nutritionists, this expert system have been worked well for people with normal body metabolism.

Keywords
Harmony Search Algorithm, Harris-Benedict, Calorie Needs, Nutrition, Diet.

Topic
Computer Science

Link: https://ifory.id/abstract/UxMfz8KYNwVA

Corresponding Author
Wiyoga Baswardono

Institutions
Department of Informatics, Sekolah Tinggi Teknologi Garut, Jalan Mayor Syamsu 1, Garut, Indonesia
*wiyoga.b[at]sttgarut.ac.id

Abstract
The articles aim to analyze and design of human resource information system (HRIS) for micro small and medium enterprises in Indonesia. The problem some times occurred happen in human resource when business starts to grow. To solve this start with analyzing and design in this HRIS system using RUP (Rational Unified Process) to handle a problem such as attendance, payroll, manage employee and other Human resource problem in the scope of small or medium business. The result is a design of HRIS that can be a start for a blueprint and can be implemented for micro small and medium enterprises with condition and regulation that fit in Indonesia.

Keywords
information system; HRIS; design system; enterprise system

Topic
Computer Science

Link: https://ifory.id/abstract/HD7cGKFwXULp