Indonesia Conference Directory

Corresponding Author
Ghanima Yasmaniar

Institutions
a) Petroleum Engineering, Universitas Trisakti
Jalan Kyai Tapa No. 1, Jakarta Barat 11440, Indonesia
*ghanimayasmaniar[at]gmail.com

Abstract
Permeability is an important reservoir property but is difficult to predict. Accurate measurement of permeability values can be obtained from core data analysis. However, this analysis is not possible to do at all interval wells in the field, so that permeability information becomes incomplete. Then, the use of artificial neural network methods can be an alternative to predict the incomplete permeability value. This study used 191 of sandstone core samples from Upper Cibulakan Formation in the North West Java Basin. These core data were used to determine hydraulic flow unit (HFU) from the reservoir, and to obtain a relationship between porosity and permeability for each HFU. The application of artificial neural network method is done by building a database of flow zone indicator (FZI) based on its relationship with log data. From this FZI value, the HFU class can be known. Afterward, the permeability value can be obtained according to the equation of the relationship between porosity and permeability at each HFU that had been generated. Based on this study, the result of permeability value is not much different from core data at the same depth, so that this method can be applied to obtain the permeability in uncored intervals.

Keywords
Permeability; Artificial Neural Network; Hydraulic Flow Unit, Flow Zone Indicator

Topic
Industry Engineering

Link: https://ifory.id/abstract/xU3JPzCpa6YM

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
Tazkiaturrizki Tazkiaturrizki

Institutions
Environmental Engineering Departement, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jalan Kyai Tapa No.1, West Jakarta 11440, Indonesia
*tazkiaturrizki13[at]trisakti.ac.id

Abstract
Granular Activated Sludge - Sequencing Batch Reactor (GAS- SBR) has the ability to treat wastewater with high organic pollutant. The aims of this study to determine the effect of aeration time to remove parameters of COD, BOD, TSS and Total Ammonia in chicken slaughterhouse wastewater using GAS-SBR. The artificial wastewater treatment used as represent of chicken slaughterhouse wastewater in this processing is artificial wastewater made from a mixture of sucrose, KNO3 and KH2PO4. GAS formation was form by reacting activated sludge with slow stirring at 20 rpm. SBR has a total work volume of 45L which is operated in 5 stages (fill – 0.25 hours, aeration time varied for 2 hours, 4 hours and 6 hours, settle - 0.25 hours, draw - 0.25 hours and idle - 6 hours). The results showed that the variation of aeration time is optimum at 2 hours with the efficiency of COD removal was 72.83% (influent of 6016 mg/L), BOD was 72.23% (influent of 3614 mg/L) and TSS was 59.8% (influent of 2.8 mg/L). For total ammonia removal, the variation of aeration time is optimum at 4 hours resulted with efficiency of 65.85% (influent of 2.29 mg/L)

Keywords
GAS-SBR, chicken slaughterhouse, wastewater, aeration time

Topic
Environmental Engineering

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

Corresponding Author
Muhammad Nur Hudha

Institutions
1) Universitas Kanjuruhan Malang, Jl. S. Supriadi no 48, Malang 65148, Indonesia
2) Universitas PGRI Adi Buana Surabaya, Jl. Dukuh Menanggal XII, Surabaya 60234, Indonesia
3) Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Karangmalang, Yogyakarta, 55281, Indonesia
4) Universitas Ahmad Dahlan, Jl. Ki Ageng Pemahanan 19 Sorosutan, Yogyakarta, 55162, Indonesia
5) Universitas Negeri Surabaya, Jl. Rektorat Unesa, Lidah Wetan, Surabaya, 60213, Indonesia
6) Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi 229, Bandung 40154, Indonesia

Abstract
This research is a preliminary study to explore information on advanced physics learning in children who are waiting in Indonesia. This study uses qualitative methods with questionnaire data and interviews with lecturers, teachers, deaf students and parents of deaf people. The conclusion obtained from this study is that deaf students need a more effective application for advanced physics learning to support the industrial revolution 4.0.

Keywords
advanced physics; android; deaf students;

Topic
Computer Science

Link: https://ifory.id/abstract/6Xv9TjVFBkRu

Corresponding Author
Anak Agung Ayu Putri Ardyanti

Institutions
STMIK Primakara
Jl. Tukad Badung No.135, Renon-Denpasar, 80226
a)*satwika[at]primakara.ac.id, wahyuuntoro54[at]gmail.com, putri.ardyanti[at]primakara.ac.id,
b) Balai Konservasi Tumbuhan Kebun Raya Eka Karya Bali - LIPI
Jl. Kebun Raya, Candikuning, Baturiti-Tabanan, 82191
wawan.sujarwo[at]lipi.go.id

Abstract
Luther-Sutopo is a method used to create multimedia products. The stages in the Luther-Sutopo method are divided into 6 stages, namely the concept, design, collecting materials, assembly, testing and distribution. The Luther-Sutopo method was successfully used to create multimedia products such as movies, videos or interactive multimedia applications such as games. But in a book written by Hidayat and Astari, they argue that the maintenance stage is a stage that can make the game said to be successful in its distribution. From the case study of making the Bedugul Forest game it was found that there were some changes to the Luther-Sutopo method. These changes are the occurrence of repetitive assembly and testing processes until no errors are found in the game. The next change is at the maintenance stage, a new maintenance stage can be done if a system error is found in the game that has been distributed and the emergence of new Android devices that are not supported by the game.

Keywords
Luther-Sutopo Multimedia Method, Game Development, Education Game

Topic
Computer Science

Link: https://ifory.id/abstract/muX7gLWk6jzG

Corresponding Author
Irika Widiasanti

Institutions
(a) Faculty of Engineering, Universitas Negeri Jakarta
Jalan Rawamangun Muka, Jakarta 13220, Indonesia
*irika[at]unj.ac.id

Abstract
The purpose of competency certification can be seen from two complementary aspects, namely to assess a persons ability and expertise in his profession and come out to give confidence to the user that the competence of labour fulfills the requirements in carrying out the task. However, the number of construction labour certified is only about 3% of all construction labour in Indonesia. This study aims to identifying inhibiting factors of competency certification in the perspective of construction labour, especially skilled labour. This study uses a quantitative model with descriptive analysis. This research was conducted on skilled labour in three high-level building projects. The research design used in the form of surveys with data collection methods through questionnaires, observation, and literature study. The results of this study indicate that the factors that hinder skilled labour in obtaining competency certification are 1) Complexity of the implementation of competency certification, 2) The high cost of competency certification, 3) There is no difference in certified labour wages, 4) The certificate does not guarantee quality work

Keywords
competency certification, inhibiting factors, skilled labour

Topic
Civil Engineering

Link: https://ifory.id/abstract/YKngqLQU3Tbv

Corresponding Author
Sudi Dul AJi

Institutions
Universitas Kanjuruhan Malang, Jl. S. Supriadi no 48, Malang 65148, Indonesia

Abstract
This study aims to develop and test the feasibility of learning media in the form of Android-based Physics Education to improve students critical thinking skills in mechanical wave material. This research belongs to the Research and Development (R & D) research category with a research design using a 4D model consisting of define (design), design (develop), develop (development) and disseminate (dissemination). Validation is carried out at the develop stage by involving media experts and material experts. The study produced an Android-based physics learning media in the form of Physics Education (PhyEdu) with the results of validation obtained feasible to be tested but needed improvement in the appearance of the media.

Keywords
Android; Learning Media; Physics Education (PhyEdu)

Topic
Computer Science

Link: https://ifory.id/abstract/vfYMDxFU4Qg3

Corresponding Author
Rizka Adhiswara

Institutions
Universitas Pendidikan Indonesia

Abstract
Long-term forecasting of electricity energy consumption has become one of the main fields in the electricity sector in each country. This study aims to compare the accuracy of the results of the method used in this study with research conducted by the government to estimate electricity consumption in Indonesia. Many methods can be used to estimate electrical energy consumption such as conventional methods (exponential smoothing, ARIMA, regression), fuzzy logic and artificial neural network algorithms. The method used in this study is the Back-Propagation Neural Network (BP-ANN) algorithm. The results of this research are data on estimates of electricity consumption in Indonesia for 2019-2023. This research is expected to prove the accuracy of the Artificial Neural Network (ANN) method to estimate electricity consumption in Indonesia.

Keywords
Electriciy energy consumption forecasting; Artificial Neural Network; Back-Propagation

Topic
Electrical Engineering

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

Corresponding Author
Astri Yuliawati

Institutions
a) Biology Department, Universitas Islam Negeri Sunan Gunung Djati, Indonesia
b) Biology Education Department, Universitas Islam Negeri Sunan Gunung Djati, Indonesia
astriyuliawati[at]uinsgd.ac.id

Abstract
Lianas is one of conspicuous plant in tropical rainforests. Its special characteristics is climbing or twisting around other plant. Gunung Tilu nature reserve is one of remaining tropical forest in West Java which potentially as lianas habitat. This research aims are inventory and determine the diversity of lianas in Gambung area which is the most potential area for lianas habitat in Gunung Tilu nature reserve. This research was carried out by descriptive exploratory method. Sampling was done by combining transect and quadrat technique method, with length of the transect is 700m which stretched from an altitude of 1489mpl (the lowest altitude at the study site) to 1580mdpl (highest altitude). The results showed that there were 13 families, 15 genera with 24 species of lianas. Tetrastigma sp. is the type of liana with the highest Important Value Index of 29.24%, while Aescyhnanthus sp.2 and Cissampelos pareira have the lowest Important Value Index of 0.47%. Lianas Shannon – Wiener diversity index in Gambung area Gunung Tilu nature reserve is 1.092.

Keywords
Liana, vegetation analysis, diversity

Topic
Biology

Link: https://ifory.id/abstract/8yEeAN3mh64u

Corresponding Author
Neneng Windayani

Institutions
Department of Chemistry Education, UIN Sunan Gunung Djati Bandung
Jl. A. H. Nasution No. 105, Bandung 40614, Indonesia
a)E-mail: nenengwinda.ftk[at]uinsgd.ac.id

Abstract
This study aims to obtain an optimum combination formulation of cera alba in the manufacture of lip balm with natural material collorant in accordance with SNI. The experimental method used was maceration of natural products with n-hexane solvents and concentrated with a rotary evaporator to find a dark yellow paste. Furthermore, making lip balm with various formulations of 2 gr cera alba, 2.5 gr, 3 gr and without cera alba in 10 gr shea butter with additives of orange and stawbery essence and natural coloring agent from carrots. The stability of lip blam the homogeneity test was carried out, the stability test carried out for 20 days at room temperature by observing changes in color, odor, and dosage form, pH test, topical test, and irritation test. The experimental results showed that all lip balm preparations were homogeneous, had a pH of 5-5,5 and did not cause skin irritation after 10 minutes of applying to the skin.

Keywords
Lip balm formulation, natural coloring agent, carrot extract

Topic
Chemistry

Link: https://ifory.id/abstract/j7UMpduczXNt

Corresponding Author
Rositayanti Hadisoebroto

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

Abstract
In Indonesia, especially in urban area such as Jakarta, it is very common that greywater generated from households run off into drainage system. The greywater that mixed together with rain water will flow onto river. Increasing population means increasing in households as well as greywater generated, that become serious problem when greywater becomes dominant in drainage system. To minimize the pollution from greywater in river stream, it was used the constructed wetland with subsurface system in riverbanks of Ciliwung river. The research was conducted using the vetiver (Vetiveria zizanioides) planted in the subsurface-constructed wetland to decrease the parameter of ammonia and phosphate from greywater. The aim of the research is to determine the removal efficiency of the parameters from greywater using the wetland located in Srengseng Sawah subdistrict, South Jakarta City. With the residence time of 2 days, the parameter of ammonia could removed 70% while for phosphate parameter is 65%. To reach the quality standards, it is suggested to add the pre-treatment of aeration for the wetland.

Keywords
Subsurface-Constructed Wetlands, Greywater, The Vetiver

Topic
Environmental Engineering

Link: https://ifory.id/abstract/NTaYygp3RQAe

Corresponding Author
Samadi Samadi

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

Abstract
This study aims to obtain empirical data on the model of social engineering of elderly fishermen in improving the quality of local life. The study used qualitative methods, from May to November 2017 in Pantai Bahagia Village, Muara Gembong District, Bekasi Regency, West Java. The results of the study show that: (1) The various strategies adopted by elderly fishermen in fulfilling their daily needs and their application in daily life are highly dependent on various socio-cultural factors and the possible strategies that can be developed. The main strategies carried out in the elderly at the research site include: intensification strategies, job diversification strategies, and strategies for utilizing social relations. (2) An intensification strategy is a pattern of operating a business tool (boat are used as business capital) by involving boys. (3) Diversification strategy is a pattern of additional work besides being a daily fisherman, such as working as a fish seller outside the village, a camera repairman, or a fisherman worker. And (4) The strategy of utilizing social relations, is a pattern that is not directly related to service, but still has influence in the social and cultural fields such as social works, as well as guardians of the tomb.

Keywords
Social Engineering Model, Increasing Local Life, Elderly Fishermen, Muara Gembong Bekasi.

Topic
Environmental Engineering

Link: https://ifory.id/abstract/paFPGve6nKhL

Corresponding Author
Siti Nurjanah

Institutions
State University of Jakarta

Abstract
The industrial revolution era 4.0 demands changes in all aspects. Therefore, human resources are prepared to have the skills needed in the 21st century, including 4C (critical thinking, creativity, communication, and collaboration). However, all these skills are meaningless if not accompanied by good characters. Planting these characters requires additional learning, as well as appropriate learning methods. Therefore, general education is needed as the closing of the educational gap in the industrial revolution 4.0. Adjusting to the era of industrial revolution 4.0, educational methods must use technology. Therefore, the research and development of e-conosmart 2.0 was made, integrated economic learning in general education, which included anti-corruption education, national defense, tolerance, diversity, multiculturalism, disaster mitigation, and tax awareness, which were packaged in appstores, twitter, facebook and instagram, in the form of qoutes that provide life lessons. Based on the results of research and development, the use of e-conosmart 2.0 which contains general education, is able to attract students enthusiasm in learning, successfully instill 21st century skills into students, and shape the character of students. So, that it is expected that the presence of E-conosmart 2.0 can create a generation of Indonesians who are of high quality, competitive, and have good character.

Keywords
Industrial Revolution 4.0, general education, e-conosmart 2.0, economic education, educational management

Topic
Management Science

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

Corresponding Author
Restu Minggra

Institutions
a) Department of Architectural Education, Faculty of Technology and Vocational Education, Universitas Pendidikan Indonesia
Jalan Dr. Setiabudhi No. 207 Bandung 40154, Indonesia

Abstract
Various types of buildings and several additional facilities and other elements in the landscape of Universitas Pendidikan Indonesia (UPI) campuses are constantly diversified growth, which derived a lot of problems in the visual environment and create all sorts of visual confusion. The right application of signage as an architectural solution that offered to solve that problem, must also well designed and reflect the visual identity of UPI that should be meaningful and recognizable. This study focuses on perceptions of academic communities toward the significance of the visual identity of UPI as an academics institution. A survey questionnaire was administered to all academic communities at the UPI, and the data were analyzed using the theory of Semiotics. The result of this study is used as a foundation for signage designs- decision that carried more than communicative, but also part of brand-identity development that strengthens the definition of UPI as the modern and future-minded educational institution.

Keywords
signage; semiotics; visual identity; brand identity

Topic
Architecture

Link: https://ifory.id/abstract/JxrWjYXnd793

Corresponding Author
Eva Dwi Minarti

Institutions
a)mathematics education, Universitas Pendidikan Indonesia b) IKIP Siliwangi
*eva.arti[at]student.upi.edu

Abstract
This study aims to examine the effect of the mathematical disposition of junior high school students on mathematical communication skills. This study used a correlation method with a quantitative approach. The subjects in this study were 31 student which is eighth grade at one of the junior high schools at Bandung. The instrument used consists of a test instrument which is a test of mathematical communication skills with the indicator is forming a mathematical model; arguments based on analysis of images and concepts; and the appearance of conceptual models, such as images, diagrams, tables and graphs and non-test instruments in the form of questionnaires about students mathematical dispositions. The results of the study show that the mathematical disposition of junior high school students has a positive influence on mathematical communication skills. Students who have a positive disposition towards mathematical learning tend to be active and can express ideas well.

Keywords
Mathematical Disposition, Mathematical Communication Ability, Middle School Students

Topic
Mathematics

Link: https://ifory.id/abstract/VdYavgEH2Kep

Corresponding Author
Dedy Rahman Prehanto

Institutions
Universitas Negeri Surabaya

Abstract
Determining possible technology used in calculating customer buying interest is important for the company as it relates to marketing strategies and policies. The Naïve Bayes Classifier is a possible method to measure customer buying interest. This study aims to analyze the accuracy of this method in calculating customer buying interest of internet token. Data were obtained from past sales and then analyzed using the Naïve Bayes Classifier to predict future opportunities by defining the class of attributes. The classifications used were operator, internet quota, token active period, and product price. This study found that the Naïve Bayes Classifier was provably accurate in calculating customer buying interest as well as comparing the prediction with actual results aside the data training. Results showed that this method successfully classifies 10 products of 858 transactions as data training and 10 products of 115 transactions as data test. Here indicates that all data test and data training analysis showed eight of the tenth meaning that eight of ten predictions were correct or it had 80% accuracy. This study is expected becoming a reference in analyzing data sales and predicting future sales conditions, so it will help to determine appropriate strategy of product development.

Keywords
naïve bayes classifier, internet token sales

Topic
Computer Science

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

Corresponding Author
Julian Amriwijaya

Institutions
Faculty of Psychology, University of Padjadjaran
Jln. Raya Bandung-Sumedang Km. 21
Jatinangor, Kab. Sumedang 45363
Jawa Barat, Indonesia.
*julian[at]unpad.ac.id

Abstract
This research was an exploratory study about place attachment and pro-environmental behavior among teenagers. The purpose of this research was to found where are the places that have relevant emotional attachment to pro environmental behavior among teenager. This study also to explore who were the actors in those place that have significant contribution to the place attachment. The study using qualitative research approach on the total number of 375 high school students. An open ended questionnaire was used to explore how the place could have an emotional attachment to their pro environmental behavior. Also to figure out teenager-s perception about contribution of an actors. The data was analyzed using qualitative approach with stages was an early coding, categorization, axial coding and tabulation. The data were analyzed using descriptive analysis. Results showed the place that have significant emotional attachment to pro environmental behavior are home and school. The actor that have significant contribution to place attachment and pro environmental behavior in the home are parents (80%), brother/sister (10%) and housemaid/nanny (10%) and in the school are teachers (60%), peers (40%). This study gave the insight that home and school are still the important place for teenager-s pro environmental behavior.

Keywords
place attachment; pro-environmental behavior; teenagers;psychology

Topic
Environmental Engineering

Link: https://ifory.id/abstract/xHE4dB9QG8p6

Corresponding Author
Agung Yuda Sulaksana

Institutions
Teknik Elektro, FPTK, Universitas Pendidikan Indonesia

Abstract
ABSTRACT Street Lighting (PJU) is lighting designed to support for safety and provide comfort for road users with energy-efficient lamp designs. This paper aims to describe the design results with DIAlux using LED lights, to obtain efficient results and according to SNI: 7391: 2008. The selection of efficient street lighting must take into account the following factors: price factors, loss of loss to conductors, and long life that supports smart lighting. The results showed that public street lighting that had been redesigned with the mesopic method gave results that met SNI: 7391: 2008 and were more efficient.

Keywords
Street lighting, DIALux, LED, efficiency energy

Topic
Electrical Engineering

Link: https://ifory.id/abstract/neucg8ARhEQD

Corresponding Author
Desy Safitri

Institutions
(a), (b), (c), (d), (e) Universitas Negeri Jakarta, Jalan Rawamangun Muka No: 1 Jakarta Timur, Indonesia

Abstract
This research aim is to propose ecotourism model in Jakarta. This research used survey method to 1077 tourists in Jakarta in Indonesia. Data were analyzed using Structural Equation Modeling (SEM). The results confirmed that natural basis, conservation, sustainability, local benefits, and awareness are positively associated with ecotourism. The four dimensions including environmental horizon, not destroying environment, loving environments, and respecting environments have positive relations to ecotourism. The other four dimensions involving guaranteeing benefits of flora and fauna, maintaining environmental harmony responsibly, using natural environments not excessively, and not writing off tourism place are positively associated with ecotourism. Results also confirmed that dimensions consisting of preventing negative impact of tourism activities, maintaining environmental balance, natural conservation, and maintaining natural sanctuary are positively related to ecotourism. Other findings confirmed that local society welfare, not destroying local culture, financial benefits to society, and local society characters are positively correlated with ecotourism. Results also found that diminishing environmental destruction, not polluting the environments, not using water excessively, and environmental cleanliness are positively associated with ecotourism. It can be concluded that ecotourism model in this research can be used in Jakarta to conserve the environment.

Keywords
ecotourism, natural basis, preservation/conservation, sustainability

Topic
Management Science

Link: https://ifory.id/abstract/yfNvKAMQCz7J

Corresponding Author
Purnawan Purnawan

Institutions
University of Andalas

Abstract
Since Grab bike and Go-jek operate using smart phone application in 2015, now this mode of transport is very popular in Indonesia. This mode of transport serves many features that most of them are needed by people. Because of the popularity, this mode of transport has spread in more 100 cities in Indonesia. Although, this transport mode is not regulated in UU No.22 Year 2009 but government can not avoid the reality that people like using this services. This research explores the potential problems on operational Grab bike and Go-jek. Survey was conducted by interviewed 100 drivers in Padang. Characteristic of drivers were explored, and operational characteristic of Go-jek and Grab Bike were identified. From the analysis it can be concluded that the driver work in Go-jek and Grab Bike because of low degree of education and could not work to good job, and other drivers are already work to other job but has low income. The potential problems that could arise is from internal and external factors. From internal factor, it is caused by the characteristic drivers it self, and from external factors, it is caused by the operational system and competition with other mode of transport. Recommendation has been developed to reduce the potential problems that could arise.

Keywords
potential problems, operational, go-jek and grab bike

Topic
Civil Engineering

Link: https://ifory.id/abstract/VZ9tjpr4qAhR

Corresponding Author
Tazkiaturrizki Tazkiaturrizki

Institutions
Environmental Engineering Departement, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jalan Kyai Tapa No.1, West Jakarta, Indonesia
*tazkiaturrizki13[at]trisakti.ac.id

Abstract
Sanitary landfill activities produce leachate that contain of high pollutant wastewater from the solid waste. Anaerobic Fluidized Bed Reactor (AnFBR) is one of technology that able to treat wastewater with high pollutant. This study has purpose to analize the effect of hydraulic retention time (12, 24, 36, and 48 hours ) on the leachate treatment using AnFBR. The leachate collect from TPA Rawa Kucing that has characteristics of COD 5200-5500 mg/L and BOD 2000-2500 mg/L. Seeding and acclimatization is the first method to get the biomass of anaerobic sludge without oxygen supply. During the process, nutrient for the biomass was maintained by giving additional nutrient of glucose 33%, sanitary landfill sludge filtrate 5% and 33% of leachate and 28.3% chlorine-free water at the first formula. The second formula is by mix the glucose 20%, sanitary landfill sludge filtrate 6% and 40% of leachate and 28.3% chlorine-free water, and it tooks 3 months. The results is optimum variations of hydraulic ratention time is 48 hours, to remove BOD, COD, and TSS at 78%, 92% and 22% efficiencies. The degradation rate of the substrate (k) in Anaerobic Fluidized Bed Reactor is 0.73 day-1.

Keywords
leachate, AnFBR, hydraulic retention time, degradation rate

Topic
Environmental Engineering

Link: https://ifory.id/abstract/7cU4erQpt6P3

Corresponding Author
Ardika Nurmawati

Institutions
Department of Chemical Engineering, Faculty of Industrial Technology, Sepuluh Nopember Institute of Technology (ITS), Kampus ITS Sukolilo Surabaya, 60111, Indonesia

Abstract
The addition of alcohol as an oxygenated compound, affect the vapor pressure of gasoline. In this study, the vapor pressure of isobutanol – isooctane/n-heptane blends were investigated. Vapor-liquid equilibrium data for the binary systems of isobutanol + isooctane/n-heptane were measured at low temperatures ranging from 303.15 to 323.15 K. The measurement was carried out using simple quasistatic ebulliometer. The apparatus validated by comparing the vapor pressure of pure isobutanol, isooctane, and n-heptane with the published data and average absolute deviation (AAD) obtained was less than 0.83%. The vapor pressure of the binary mixtures correlated with the Wilson, Non-random two-liquid (NRTL), and Universal quasichemical (UNIQUAC) models. The AAD for isobutanol + isooctane system were 1.54%, 1.44%, 1.71% respectively and for isobutanol + n-heptane system were 1.73%, 1.65%, 1.99% respectively. The vapor pressure from the experiment for all systems shows a positive deviation from Raoult-s Law that indicates a nonideal solution.

Keywords
Vapor pressure, Isobutanol, Isooctane, N-heptane

Topic
Chemical Engineering

Link: https://ifory.id/abstract/7keZBp9vGQ4M

Corresponding Author
Lutfi Nur

Institutions
Universitas Pendidikan Indonesia

Abstract
This study aims to analyze the comparison of the intensity of motion learning in male and female students through the use of polar global positioning system (GPS). The participants in this study were junior high school students. Comparative research used in this study. The instruments used were Polar GPS RC3 and Polar Heart Rate Sensor H3 to measure the pulse and distance of the students during learning. The results of this study are expected to be an evaluation material for teachers in an effort to improve the quality of the teaching and learning process.

Keywords
polar GPS, physical education, heart rate, distance, gender.

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/Q8qyD74L9eCU

Corresponding Author
A.A GDE SATIA UTAMA

Institutions
a) Department of Accountancy, Economics and Business Faculty, Airlangga 4-6, Surabaya, 60286, Indonesia
*gde.agung[at]feb.unair.ac.id
b) Department of Accountancy, Economics and Business Faculty, Airlangga 4-6, Surabaya, 60286, Indonesia
c) Department of Accountancy, Economics and Business Faculty, Airlangga 4-6, Surabaya, 60286, Indonesia
d) Department of Accountancy, Economics and Business Faculty, Airlangga 4-6, Surabaya, 60286, Indonesia

Abstract
This paper seeks the role and affects the implementation of a knowledge management system at PT. Semen Indonesia. Semen Indonesia with Centre of Champs (SICC) to the innovation creating the process and maintain the stability before-at-after acquisition, as the strategic holding company. The qualitative Case study with direct balanced participation method used in this research. The approach helps perform means-end analysis, thereby uncovering the structural origin and the role of SICC in the managerial process, and how the far the knowledge management through SICC would affect the performance of the company. This method needs direct research to understand the real case in daily activity. The contributions this research want to examine the first multinational stated owned company maintain their performance with the knowledge management system. Also, prove the impact of the SICC as the implementation of knowledge management on the management process in real case situation. The actual natural problem and factual context of the industry and examine how PT. Semen Indonesia would react with the situation.

Keywords
knowledge management; acquisition process; Innovation; PT. Semen Indonesia

Topic
Management Science

Link: https://ifory.id/abstract/kqJDvgKtfR7C

Corresponding Author
Aries Dwi Indriyanti

Institutions
Universitas Negeri Surabaya

Abstract
Underprivileged scholarships are assistance provided by the government or institutions to students from poor families. Scholarships can be given to all students at the education level from elementary school to higher education with certain conditions and criteria. However, in reality many scholarships are given that are not on target. This is because of the number of students who register as scholarship recipients. Therefore, it is necessary to have a decision support system in order to aid the selection process. This study aims to find appropriate system to aid the underprivilaged scholarship selection. This study proposed a system which was built using PHP for programming languages and using MySQL as its database using the Simple Additive Weighting (SAW) method. Data is taken from SMK Sultan Agung 1 Jombang. Data is then analyzed and tested using the Blackbox testing method. The results of the study prove that Simple Additive Weighting can be used as a support system to help implement students in prospective scholarship recipients.

Keywords
Decision Support System, Simple Additive Weighting, Scholarship

Topic
Computer Science

Link: https://ifory.id/abstract/rFdykvmJtXW3

Corresponding Author
Muhammad Fiqri Affan

Institutions
Teknik Elektro, FPTK, Universitas Pendidikan Indonesia

Abstract
Wind Energy is an environmentally friendly and efficient energy source that is popular now. Wind Energy can be converted into electrical energy to meet the electricity needs of the community. In this paper purpose to determine potential of wind speed in the city of Bandung, and build a PLTB (Wind Power Plant) to meet the electricity needs of the community. Analyze by using Eksponential Smoothing method and Artificial Neural Network. The results obtained are average annual wind speed starting from 2019-2023 with the calculation of ANN and exponential smoothing, after knowing the results, compare the two method which method is more accurate. Benefit of this calculation is to determine whether the city of Bandung is feasible to establish a PLTB or not, judging by the results of its wind speed forecast.

Keywords
Wind Energy; Artificial Neural Network; Exponential Smoothing

Topic
Electrical Engineering

Link: https://ifory.id/abstract/enyKGfpgLNd9

Corresponding Author
Papat Yunisal

Institutions
S.3 Pendidikan Olahraga Program Pascasarjana Universitas Negeri Jakarta

Abstract
The purpose of this study was to create a learning model of basic football passing techniques for junior high schools in the city of Bandung. The research and development procedure used is the Borg and Gall model which consists of ten steps, namely: Research and information collection, Planning, Product early development, Field testing, Main product revision, Main field trial, Operational product revision, Operational field test, Product revision end, Dissemination and implementation. The learning model of the basic football passing technique that was developed was 20 passing models, of which 20 models could be used for soccer passing learning for junior high school students. The product of the basic passing soccer learning model is very effective and efficient to do for junior high school students in the city of Bandung.

Keywords
Development; learning model; passing; football.

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/v3hPnDQrfxTJ

Corresponding Author
A.A GDE SATIA UTAMA

Institutions
a) Department of Accountancy, Economics and Business Faculty, Airlangga 4-6, Surabaya, 60286, Indonesia
*gde.agung[at]feb.unair.ac.id
b) Department of Accountancy, Economics and Business Faculty, Airlangga 4-6, Surabaya, 60286, Indonesia

Abstract
The rapid development of science and technology has an impact on the utilization of computers. Currently, the network can provide substantial benefits in all areas, especially in work activities. Hence the computer becomes an essential part of the company. An industry without computer technology will not be able to compete with its rivals. Computer technology has a significant role in the world of accounting for its ability in data processing, rapid calculation, grouping, as well as in producing accurate and fast output that will improve the companys performance. PT Petrokimia Gresik is a company engaged in the fertilizer industry. The company has used semi-computerized information system, but according to this case, it still needs the support of more reliable accounting information system. The company needs an adequate sales accounting information system to solve current problems including sales recording matter. The use of the computer in the process of selling transactions will speed up information construction. This study uses a qualitative approach with the scope of analysis focused on the analysis of accounting information system of non-subsidized fertilizer sales of PT Petrokimia Gresik. The type and sources of data used are primary and secondary data. Data collection procedures are a preliminary survey, literature study, and field survey. Analysis technique used is a descriptive case study. The objective of system analysis on the sales function in PT Petrokimia Gresik is to be abreast of the weaknesses and requirements of the system, and as a result, suggestions for the company improvement will be able to be given.

Keywords
Analysis; Sales Accounting Information System; Sales of fertilizer

Topic
Management Science

Link: https://ifory.id/abstract/JRznew738F2p

Corresponding Author
Ekojono .

Institutions
Politeknik Negeri Malang

Abstract
Learning to count on elementary school students must be trained in how to memorize, many practice questions are done repeatedly. This counting exercise needs to be stimulated so that students have the motivation to learn, this kind of training is mostly done by the teacher to students by giving questions in turns in one class as if the students are in a game playing condition. Counting exercises can be applied in the form of games with applied counting operations learning to train students to count quickly. The approach with attractive application visualization is expected to be able to help the learning of elementary school level students, especially class 1. Tsukamoto Method, in each rule is represented using a fuzzy set, using a monotonous membership function. To be able to determine the value of crisp output or firm results. By using the Unity 3D game engine that is capable of making 2D games, the Fuzzy Tsukamoto method is used to determine the final game score. Tests that have been done show that the results of the questionnaire that game 2d on the functionality aspect get a result of 3.97 on a scale of 5.

Keywords
game, count Fuzzy Tsukamoto

Topic
Computer Science

Link: https://ifory.id/abstract/2gQzfbtRN8dc

Corresponding Author
Irma Fitria Amalia

Institutions
1Department of physics education, Institut Pendidikan Indonesia, Jl. Pahlawan No.32, Garut 44151, Indonesia
2Department of biology education, Institut Pendidikan Indonesia, Jl. Pahlawan No.32, Garut 44151, Indonesia
3Department of physics, Institut Teknologi Bandung, Jl. Tamansari No.64, Kota Bandung 40116, Indonesia

Abstract
A cylinder milling has been modified by adding a heating controller for coating TIO2 photocatalyst on the surface of polymer at constant temperature. By testing the polystyrene, polypropylene, and linear-low-density polyethylene polymer density before and after coating, it is obtained that polypropylene polymer is suitable for polymer-coated TIO2 because the surface is transparent and can remain floating on the surface of water although it has been coated with TIO2 catalyst. Coating process of TIO2 nanoparticles on the surface of the polypropylene is performed through three stages, that is stirring while heating in the cylinder milling, washing, and drying. The coating temperature is 1100C for 90 minutes. Photocatalytic activity was observed by testing the photodegradation of methylene blue dissolved in water using a container with a surface area 750 cm2 and illuminated by sunlight for 12 days. The experiment was done at 6 containers with similar volume and area and variable amount of catalyst, which is without catalyst (0 g) to 5 layer of catalyst (550 g). From the colour, turbidity, and UV-Vis characterization, the methylene blue decomposition effectively occurred with amount of 220 g catalyst (2layer of catalyst).

Keywords
cylinder milling, TiO2, polypropylene, methylene blue, photodegradation

Topic
Physics

Link: https://ifory.id/abstract/4KQpmLfDycr8