Indonesia Conference Directory

Corresponding Author
Adam Malik

Institutions
Program Studi Pendidikan Fisika UIN Sunan Gunung Djati Bandung

Abstract
This research aims to build physics tools of measurement of river flow is current. The tool was developed with the balance spring as a means of collecting the data. data measurement results then analyzed mathematically. It is designed using chloride polyvinyl (PVC) which is waterproof. The result of the test tool shows the average error value of 0.3342% and the value of the standard deviation of 0.1893. So it can be stated that RAV Current Meter has a level of accuracy and the level of accuracy that is high enough. This equipment still needs to be optimized by performing test audiences to see the ease of the user. In addition, the size of the adjustment to the attention of the research further.

Keywords
Water Currents, Spring Balance

Topic
Physics

Link: https://ifory.id/abstract/qmx4KabdGpFu

Corresponding Author
Desi Nur Liana

Institutions
(1)Department of Vocational Teacher of Education, Sebelas Maret University, Jl. Ir. Sutami 36A, Surakarta, Indonesia
(2)Department of Mechanical Engineering Education, Sebelas Maret University, Jl. Ahmad Yani No.200, Pabelan, Surakarta, Indonesia

Abstract
The potential energy analysis of biomass waste as a sustainable source of energy continues to increase with various design to obtain maximum efficiency. Modification of the type of material, diameter, and length of the connecting tube between the reactor and the condenser can increase its effectiveness. The optimal parameter search for the connecting tube that produces liquid-smoke are carried out using galvanized pipes and stainless-steel pipes with variations in diameter ¼ inch, ¾ inch, and length 1 meter, 0.5 meters. Testing the quantity of liquid-smoke results on sugar palm waste samples was carried out at 400 C for 60 minutes by seeing an increase of the amount of liquid-smoke. The results of the study show variations in size and type of tube affect the product yield of the pyrolysis process. Stainless-steel pipes have better performance to produce liquid-smoke. The shorter the length of the pipe increases the quantity of liquid-smoke, but the smaller the diameter of the pipe decreases the quantity of liquid-smoke. This paper discusses in more detail the comparison of the performance of connecting tube by modifying the type of material, the length, and the diameter of the pipe.

Keywords
Biomass pyrolysis, connecting tube, liquid-smoke

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/BfzPQJ8AmLRy

Corresponding Author
Hartini Laswandi

Institutions
Universitas Negeri Jakarta, Jl. Pemuda No. 10 Rawamangun, Jakarta Timur

Abstract
A B S T R A C TThe development of computer technology or cyber technology has also influenced the development of science and industry. Interior design and architecture in both the professional and educational fields are not immune from the influence of cyber technology. Cyber ​​Technology has shifted traditional methods in architectural interior design even though there are still designers who use traditional methods. This paper aims to look at the role of cyber technology in the world of architectural interior design. Also to produce a conceptual design framework in the design process, develop programmatic concepts, design concepts and design implementations from positive design aspects. The method used in the form of Systematic Review as a research method to synthesize the results of research on several related studies. It can be concluded that cyber technology makes the process of architectural interior design more efficient and easy. Cyber ​​technology allows designers and architects to explore with a high level of complexity. Computers are not only used as media to produce image products or speed up the design process, but computers have played an active role and part in the architectural interior design process. The involvement of computer media both software, hardware, sofeware, can be used as an important tool for developing creative designs and positive designs. The application of cyber technology supports the design process that can produce innovative design concepts, creative and Sustainable Value (Design For Pleasure, Design For Personal Significance, Design For Virtue).

Keywords
Conceptual Framework, Cyber Technology, Aspect positive design, architectural interiors

Topic
Architecture

Link: https://ifory.id/abstract/dnLcHQeDjE9k

Corresponding Author
Ahmad Sohib

Institutions
Research Centre for Physics, Indonesian Institute of Sciences
Kawasan Puspiptek Serpong Gd. 442 Tangerang Selatan,
Banten 15314, Indonesia
*) asohib[at]outlook.com

Abstract
Lithium titanate is one of potential materials applied as anode material for energy storage device. The material however has poor electrical conductivity and inferior diffusion property. This study is aimed to synthesize LTO doped zirconium at titanium site to its properties and performance. In this work, a facile solid state reaction is employed to prepare Li4Ti5-xO12Zrx (x=0, 0.025, 0.05, and 0.075). Starting materials were stoichiometrically calculated and mixed by utilizing mortar for an hour than followed by calcination at 800oC for three hours. The XRD pattern reveals that lithium titanate was observed while some impurities such as rutile-TiO2 and zircon silicate still appear in all samples. The cell with LTOZr 0.05 provides the highest conductivity value of the assembled cells, 0.15 mS/cm. The CD test confirm that the highest capacity of the cells, 135.0 mAh/g, is achieved by the cell based LTOZr 0.05. In addition, CV measurement also exhibits that the current peak of the cells become sharper and the polarization degree become shorter as increasing amount of zirconium.

Keywords
lithium titanate; zirconium; Lithium ion battery

Topic
Material Science

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

Corresponding Author
Cindy Pamela Cornelia Munaiseche

Institutions
(a, b) Department of Informatics, Faculty of Engineering, Universitas Negeri Manado, Sulawesi Utara, Indonesia
*cindymunaiseche[at]unima.ac.id
(c) Department of Public Health, Faculty of Sport Science, Universitas Negeri Manado, Sulawesi Utara, Indonesia

Abstract
The purpose of this study to design a knowledge based system that called expert system application for diagnosing heart diseases by using forward chaining method as one of inference technique and analyze the software functionality through black box testing. The heart organ chosen because many mortality rates are caused by sudden heart attacks. The expert system application design consists of seven stages: preliminary studies, data collection, data analysis, system design, system implementation, and the last, drawing conclusions. Expert system software application built to recognize the type of heart disease after consultation by answering a few questions about the symptoms of disease that displayed by the system, and can infer the type of heart diseases suffered by the patient. In addition, an application created to provide solutions or actions that can be performed by patients in relation to heart disease he suffered. Based on the results of black box testing, the expert system application has been running with good functionality.

Keywords
Expert System, Forward Chaining, Heart Disease, Inference, Black Box Testing

Topic
Information Engineering

Link: https://ifory.id/abstract/MuCaxVQK4pZU

Corresponding Author
Ruswan Dallyono

Institutions
Universitas Pendidikan Indonesia

Abstract
A mathematical approach to linguistics provides an array of insights for quantitative description on the ways language works. This area of investigation is still underexplored, but it is actually significant for the development of mathematical models to enhance linguists- understanding on linguistic structure. This study aims to present a mathematical analysis of how the English preposition on works under the framework of Trajector (TR) and Landmark (LM) relations (Tyler & Evans, 2003). Data were corpora taken from 10 dissertations written by American student writers. To sort the data, Ant Conc 3.4.1.0 was used to parse clauses or sentences based on the TR-LM configurations. Based on the TR-LM configurations, a mathematical model was developed to discover how these variables are quantitatively related to the number of senses produced by using a geometric representation of TR and LM. This study indicates that the relation between TRs and LMs, on the one hand, and the potential sum of senses, on the other, follows the integral function of ∑ C = ∫ TR d(LM), which means that the total number of senses of C equals the integral of TR with respect to LM. This mathematical modeling confirms the TR-LM hypothesis that every physical object has a unique sense established by their TR-LM configuration as spawned by Lakoff (1987).

Keywords
Keywords: construal, sense, preposition, trajector, landmark

Topic
Mathematics

Link: https://ifory.id/abstract/eJxjQW8a4kEK

Corresponding Author
Dede Kurniadi

Institutions
a) Department of Computer Science, Graduate Program Doctor of Computer Science, Bina Nusantara University, Jakarta, Indonesia
*dede.kurniadi[at]binus.ac.id
b) Department of Informatics, Sekolah Tinggi Teknologi Garut, Garut, Indonesia

Abstract
This article aims to proposed framework an intelligent recommender system (IRS) for students in higher education institutions. This conceptual framework includes problems in predicting student performance, the possibility of graduating on time, and recommends choosing subjects according to performance, and career interests, which are useful for assisting pedagogical interventions in future student development. The success in the development and implementation of the proposed IRS framework is inseparable from using data mining and machine learning techniques in predicting and providing recommendations. Data analysis consisted of clustering techniques, association rules, and classification using support vector machine (SVM), Naïve Bayes, and k-Nearest Neighbor (k-NN). These techniques are used to solve problems related to students and to provide appropriate recommendations. The result is an IRS conceptual framework for the college student that can be used as smart agents to provide student guidance and suggestions to support the process of education in higher education.

Keywords
framework; recommender system; prediction; student problem

Topic
Computer Science

Link: https://ifory.id/abstract/teqvfcg6NXbG

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
Indah Martha Fitriani

Institutions
State Polytechnic of Malang

Abstract
In the robotic field of study, localization is one of the important methods for autonomous mobile robot navigation. Probabilistic approaches have received significant attention in the robotics community. The discrete Bayes and Kalman filters are the fundamental algorithms in probabilistic approach which have to be clearly understood in order to develop more advanced filtering algorithms. This paper discusses discrete Bayes and Kalman filtering algorithms. The mathematical representation of each filter algorithm, in the 1-dimensional case, presented in detail. The algorithms were implemented using python to simulate the probability of the robot position. The algorithms complexity was analyzed with respect to the computational cost and size of memory used. From this study, it has been observed that the Kalman filter is computationally more efficient, and less memory is required.

Keywords
Algorithms, Kalman Filter, Bayes

Topic
Electronics Engineering

Link: https://ifory.id/abstract/7EjvNQA2XT4J

Corresponding Author
Mahrus Salam

Institutions
Center of Science and Accelerator Technology, Nuclear Energy Agency (BATAN) Indonesia
*mahrus.salam[at]batan.go.id

Abstract
A study of radiation dose for the accident condition in the Subcritical Assembly for 99Mo Production (SAMOP) reactor experimental facility has been done. The main purpose of this study is to estimate the radiation dose received by worker as well as society during accident condition in the SAMOP reactor experimental facility. In this study, one of the worst accident scenario that has the highest probability is postulated as one of TRIGA fuel fall down in to the SAMOP reactor core during loading-unloading process. That accident inflicts one of this TRIGA fuel broken and radioactive materials are released. The radiation dose is estimated based on the radioactive source-term from ORIGEN 2.1 computer code calculation. Furthermore, the total effective dose equivalent (TEDE) received by the society is calculated using dispersion model of Hotspot 3.0 computer code. From this study, the total radiation dose received by the radiation worker during this accident condition is 4.5 mSv and the maximum TEDE received by society during this accident condition is 0.031 mSv. This study shows that the radiation dose received by worker as well as society during this accident condition is still below the limit appointed by regulatory body (BAPETEN).

Keywords
SAMOP, Accident, Source-term, Radiation Dose, Dispersion

Topic
Physics

Link: https://ifory.id/abstract/E8XBGNPkyx7A

Corresponding Author
Vera Maya Santi

Institutions
a) Department of Statistics, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta
b) Department of Statistics, Faculty of Mathematics and Natural Science, Institut Pertanian Bogor

Abstract
Variable selection is an important topic in linear regression analysis. In practice, a large number of predictors usually are introduced at the initial stage of modeling to attenuate possible modeling biases. stepwise deletion and subset selection are usually used which can be computationally expensive and ignore stochastic errors in the variable selection process. In addition, the best subset selection of variables suffers from several disadvantages, the most severe of which is its a lack of stability. In this article, penalized likelihood approaches are proposed to handle these kinds of problems. The proposed methods select variables and estimate coefficients simultaneously. Some of penalty functions are used to produce sparse solutions. Based on the RMSE and GIC criteria, it was found that the factors affecting Indonesian mathematics scores from PISA with 148 independent variables showed that the SCAD penalty function had the best performance compared to LASSO, Ridge and MCP. LASSO produces 13 important variables for the model while SCAD has 11 variables which mean that the LASSO model is more complex than SCAD. The MCP produces a simpler model with 3 important variables but produces excessive bias.Ridge penalty has a worst performance based on all criteria.

Keywords
Variable Selection; Penalized Likelihood; SCAD; LASSO; MCP; Ridge; GIC; RMSE.

Topic
Mathematics

Link: https://ifory.id/abstract/AxC9NBMjKQrk

Corresponding Author
Suryo Prakoso

Institutions
a) Petroleum Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti

b) Geological Engineering, Faculty of Earth and Energy Technology, Universitas Trisakti

Abstract
It has been believed that the P-wave velocity is strongly influenced by complexity of pore arrangement. In Sandstones, pore complexity is influenced by the constituent material of rock including clay volume. Rocks with a certain clay volume will have a certain pore geometry and pore structure and also they have certain qualities. This research is intended to study the effect of clay volume on rock quality and its effect on the relationship of porosity with P-wave velocity. This research used 3 sandstone data sets from the North West Java basin, Kutai basin and Southern Sumatra basin. The mineralogy of each rock sample is dominated by quartz and kaolinite. The three data sets show the relationship of porosity and P-wave velocity can be clearly separated by clay volume. Each of these rock groups indicates rocks of different qualities called rock types. It can be concluded that the variation of P-wave velocity is influenced by rock type. The lower rock quality is denoted by the larger rock type number and is indicated by the increase in clay volume.

Keywords
P-wave Velocity, pore arrangement, clay volume, rock type

Topic
Physics

Link: https://ifory.id/abstract/qBwz6hN9JFfg

Corresponding Author
Iwan Kustiawan

Institutions
Universitas Pendidikan Indonesia

Abstract
This paper aims at analyzing traffic congestion in a base station site, Bandung city. We did experiments using iManager webLCT U2000. The connection test spans from a site using UTP cable to GPON, then to Telkom device using fiber optic, and finally to RNC. The tests are carried out before and after trouble shooting process. There are huge packet losses founded in the network so the traffic congestions are unavoidable. The key problem and solution are identified in this study. The assessment results after solving problems show that the data traffic experienced a decrease of 28.23% and the payload increased by 61.45%.

Keywords
Traffic congestion, packet loss, payload

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/A7u3xrLQMVRv

Corresponding Author
Saprizal Hadisaputra

Institutions
a) Chemistry Education Division, Faculty of Science Education, University of Mataram.

b) Department of Chemistry, Faculty of Mathematics and Natural Science, University of Mataram.

Abstract
The efficiency of ethyl-p-methoxycinnamate and its derivatives as corrosion inhibitors of iron corrosion in acid environment has been studied to find the relationship between molecular structure parameters with the efficiency of corrosion inhibition. The MP2 perturbation theory was applied to calculate molecular structure and electronic parameters. Computational and experimental corrosion inhibition efficiency show that the electronic properties of molecules, including the orbital molecular frontier energy (HOMO and LUMO energy), ionization potential, electron affinity, electronegativity, softness, hardness, number of electron transfer from inhibitor to metal, and interaction energy have a strong relationship with inhibition performance. Furthermore, Fukui function obtained from natural bond orbital analysis was employed to study the interactions between inhibitors with iron metal in more detail. The presence of heteroatom and electron donor groups within the frameworks of inhibitors has a significant effect on corrosion inhibition performance.

Keywords
ab initio, corrosion inhibition, ethyl-p-methoxycinnamate, inhibitor

Topic
Chemistry

Link: https://ifory.id/abstract/qWFtTUZuN94L

Corresponding Author
Ni Made Ayu Suardani Singapurwa

Institutions
Department of Food Science and Technology, Warmadewa University

Abstract
‘Pedetan- is one of the food products of the traditional Balinese fish sardine which is processed by the community in the Jembrana Regency of Bali Province. This study aims to determine the antimicrobial activity of garlic and kaempferia galangal in inhibiting the growth of Aspergillus sp. which can contaminate the sardine fish Pedetan, The study was conducted by isolating Aspergillus sp. from Pedetan and testing the inhibitory power of garlic and Kaempferia galangal The results showed that the extract of garlic and Kaempferia galangal can inhibit the growth of Aspergillus sp. From the results of SEM observations it was found that garlic and kaemfiera were able to damage the Aspergillus sp. Mycelia. compared to control treatment. Garlic extract and kaempferia galangal can inhibit the growth of Aspergillus sp. because they contains bioactive compounds that are antimicrobial.

Keywords
Aspergillus sp., Garlic, Kaempferia galangal

Topic
Biology

Link: https://ifory.id/abstract/vVYnCDG9L8jW

Corresponding Author
Epa Paujiah

Institutions
a) Department of Biology, Faculty of Sciences and Technology, UIN Sunan Gunung Djati Bandung
Jl. AH. Nasution, No. 105, Cibiru, Bandung
b) Department of Biology Education, Faculty of Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung
Jl. Soekarno Hatta, No. 750, Gede Bage, Bandung
*epapaujiah[at]uinsgd.ac.id

Abstract
Green alge (Chlorophyta) is one of macroalgae who have much function such as ecologically and economically living in the intertidal zone. Purpose of this research want to know about abundance of green algae group in the intertidal zone, Karang Papak Coastal, West Java, Indonesia. The research was carried out in November 2018 every week (following moon phase) with transect methods. The results showed that the Karang Papak Coastal have 15 Species with genus of Ulva who have highest abundance than other group. Its can be caused by several factor such micro and macro climate (Temperate). This data can be use for complete data about Indonesian macrolagae.

Keywords
Abundance, Indonesia, Intertidal Zone, Karang Papak Coastal, Macroalgae,

Topic
Biology

Link: https://ifory.id/abstract/FJT4vmjUxMhw

Corresponding Author
Dwi Ely Kurniawan

Institutions
Politeknik Negeri Batam

Abstract
Information system security in the network becomes the most important thing to note, especially on a web application system, both organization and personal. Some ways that are used to provide a guarantee of data security is to verify the login to the web application system using One Time Password (OTP). However OTP sometimes still has a gap though OTP data only valid for one login session. This research develops information system security with OTP data encrypted with blowfish algorithm. The blowfish algorithm is divided into two main sub-algorithms namely the key expansion part and the data encryption-decryption section. OTP system design results developed blowfish algorithm data received and sent can be kept confidential.

Keywords
Academic Information System; OTP; Blowfish Algorithms; Security System

Topic
Information Engineering

Link: https://ifory.id/abstract/B6EjqQA82v7a

Corresponding Author
Rini Puspitaningrum

Institutions
1Dept. of Biology, Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia
2 Dept of Physics. Universitas Negeri Jakarta. Jalan Rawamangun Muka 13220. Jakarta Indonesia

Abstract
Myoglobin is a cytoplasmic hemoprotein with an important role of maintaining oxygen homeostasis of tissues. The brain needs quite a high amount of oxygen to carry out its metabolism. Therefore, this study was conducted to detect the expression level of myoglobin mRNA in the brain of normal rats (Rattus novergicus).The study was conducted at the Biochemistry and Molecular Biology Laboratory of the Biology Major of the Faculty of Mathematics and Natural Sciences, UNJ from December 2010 to February 2011. Through 1.5% agarose gel electrophoresis, results show that the myoglobin band of 114bp was detected in the brain of normal rats (Rattus novergicus). Due to the positive results, there is a huge possibility that the myoglobin expressed in the brain of rats (Rattus novergicus) would be altered into protein during environmental conditions of low oxygen concentration.

Keywords
myoglobin mRNA, normal, brain, Rattus novergicus.

Topic
Biology

Link: https://ifory.id/abstract/rNcgQJ3fxqPy

Corresponding Author
Hesti Renggana

Institutions
Departement of Pharmacy, Faculty of Mathematics and Natural Sciences Universitas Garut, Garut, Indonesia

Abstract
Obesity is a metabolic disease characterized by high levels of fat. Previous studies have reported that Jambu Bol leaves (Syzygium malaccense (L) Merr. & Perry) have the efficacy of Antiobesity. To ensure safety, acute toxicity testing is carried out. The test animals used were 24 female white mice, divided into 6 treatment groups. Group 1 as a control group was given aquades. Group 2-6 was given ethanol extract of guava leaves with doses of 300, 1000, 2000, 4000 and 5000 mg / KgBB. The test is carried out for 14 days where the preparation is only given once. The parameters of the study included behavioral tests on the first and 14th day, body weight every day, macropatology of vital organs and organ indexes on the 14th day. The results of all doses of extract did not show a decrease in body weight, behavior changes and macropatological changes but there were differences in organ indexes, so that Jambu Bol ethanol extract can be declared not toxic.

Keywords
acute toxicity, Syzygium malaccense

Topic
Pharmacology

Link: https://ifory.id/abstract/TEh9QXUaZBWY

Corresponding Author
Iman Nasrulloh

Institutions
a) Institut Pendidikan Indonesia Garut, Jalan Pahlawan No.32 Garut
*imannasrulloh[at]gmail.com
*imannasrulloh[at]institutpendidikan.ac.id

Abstract
Cloud computing is an information technology service that can be used or accessed by users to manage data and applications through the internet network. Software as a service is one type of cloud computing service in the form of software. The purpose of this study is to analyze the use and students acceptance on cloud computing types of Software as a service including the most used applications, factors that influence usage, benefits obtained, andto find out their use related to learning and learning activities in school. The researcher used a mixed method research design approach to obtain qualitative and quantitative data. Data collection by conducting interviews and giving questionnaires to 328 students from 10 high schools in Garut who were randomly selected. The findings show that the Google application is widely used by students. The flexibility factor is the reason for using cloud computing technology as a type of software as a service. Broad access is a benefit obtained by students in using cloud computing type of software as a service. It needs to be given an understanding to students about the use of cloud computing type of software as a service for learning activities in education at school.

Keywords
Cloud Computing, Software as a Service, Students

Topic
Computer Science

Link: https://ifory.id/abstract/HDBF2ZuKNemx

Corresponding Author
Didin Wahyudin

Institutions
Universitas Pendidikan Indonesia

Abstract
The need of practical equipment in the Electrical Engineering Education program is necessary. However, due to some difficulties such as, the pricey of available training kit in the market caused that most student could not get appropriate practical work equipment. One of the important facility is a training kit encouraged student to learn Internet of Things. This study describes the design of the Internet of Thing Training Kit based on ESP-32 (IoTTK32). A set of IoT training module has been designed. Through Research and Development Approach, researcher have constructed low-cost IoT trainer that can be used in induatrial practical work. The results of examination show that produced IoT kit coud be used in formal practical work of industrial automation related to the industrial 4.0 evolution.

Keywords
Internet of things, practical work, industrial automation, low-cost equipment

Topic
Electrical Engineering

Link: https://ifory.id/abstract/86kGMbRxjPzQ

Corresponding Author
rina kurniawati

Institutions
Department of Industry Engineering, Sekolah Tinggi Teknologi Garut, Jl. Mayor Syamsu No. 1 Garut 44151, Indonesia
*rinakurniawati[at]sttgarut.ac.id

Abstract
In Tofus micro and medium enterprises, there is one traditional activity that is conducted repeatedly, called the cutting process. This cutting process is done by using a kitchen knife which makes it not efficient and can cause fatigue for operators. In addition, there is also the possibility of different sizes of tofu pieces because there is no measuring tools to cut it. This is because operators just follow the mold flow on the tofu. This study is aimed to make a product plan for tofu cutting tools. The Analytical Hierarchy Process was used as a research method in this study. This method begins with conducting interviews regarding the choices in level 1, 2 and 3 actions to several respondents. The respondents must choose and give an assessment on a scale of 1 to 9. The result taken from a variety of alternative solutions, which is made based on requirements specifications, is that the product of the tofu cutting tool is selected with materials made of pine wood, strings, handles, naples, and naple bolts. Moreover, the product produced will have a size of 52 x 52 cm2. The product design is based on material and tool specifications to produce a simple design. This is made so that the tofu cutting tool is easy to use as well as low cost.

Keywords
Analytical Hierarchy Process; Micro and Medium Enterprises; Product Plan; Traditional Activity

Topic
Industry Engineering

Link: https://ifory.id/abstract/drfvZzL6Rcea

Corresponding Author
Neneng Windayani

Institutions
1 Prodi Pendiidkan Biologi, 2Prodi Pendidikan Kimia, Fakultas Tarbiyah dan Keguruan, UIN Sunan Gunung Djati Bandung Jl. A.H. Nasution No. 105, Bandung 40614, Indonesia

a)E-mail: nenengwinda.ftk[at]uinsgd.ac.id

Abstract
In this study, the nutritional composition of milk kefir cream and hunger resistance on its use as a menu of pre-dawn meal were examined. The pre-experimental design of intact group comparison was used on 34 research subjects. The experimental group (n = 17) treated pre-dawn meal using milk kefir cream and cereal while the control group used a complete per-dawn meal menu. The time of preparation, the implementation of the meal and hunger resistance were calculated and recorded. Based on the results of the study, in terms of methods, consuming 250 mL of milk kefir cream and cereal only takes about 7.9 minutes with a hunger resistance of up to 9.4 hours. With this composition and method, it is suggested that the results of this study can be useful to be an effective alternative of pre-dawn meal both in Ramadan and other Sunnah fasts.

Keywords
pre-dawn meal, milk kefir, fasting, glycemic index

Topic
Chemistry

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

Corresponding Author
Ernita Maulida

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

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

Keywords
customer satisfaction, online shopping, baby clothes

Topic
Management Science

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

Corresponding Author
kukuh mukti wibowo

Institutions
(a)Mechanical Engineering education, Teacher Training and Education Faculty, Sebelas Maret University, Jl. Ir. Sutami 36A, Jebres, Kota Surakarta 57126, Indonesia
*agung.pambudi[at]staff.uns.ac.id
(b)School of Environment and SocietyTokyo Institute of Technology

Abstract
The aim of this research is to analyze the effect of using immersion cooling with different flow rate and fan rotation on decreasing the temperature on CPU. The study used three variables of flow rate: 0.5, 1 and 1.5lpm. in addition, three other variables of fan rotation, 400, 600, and 800 rpm, were used as well.. Data collection was by means of benchmark software to load the CPU to work maximum and the logging software to record the temperature. The results show that the immersion cooling could potentially be utilized as the new and more effective cooling system. The most optimum variable to decrease the temperature was 1, 5 lpm with fan rotation at 800 rpm. It decreased the maximum temperature from 60 °C to 47 °C, a deviation of 13 °C lower compared to the conventional fan cooling system with air as a medium. The study established that the higher the flow rate and the fan rotation, the higher temperature can be decrease. Therefore, immersion cooling can be the solution to decrease the consumption of energy on IT sector on a bigger scale.

Keywords
Immersion cooling, mineral oil, flow rate

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/8cJMR4UWeDCq

Corresponding Author
Luh Gede Pradnyawati

Institutions
Faculty of Medicine & Health Sciences of Warmadewa University

Abstract
Previous sudies on commercial sex workers reported that the number of commercial sex workers spreading throughout Denpasar city and its surroundings is 250 persons and 14% of them had been infected with HIV/ AIDS (Human Immunodeficiency Virus/ Acquired Immune Deficiency Syndrome). However, referring to the data in the City Health Service of Denpasar, the number of direct commercial sex workers throughout Sanur area in 2017 is 450 persons. Such number confirms that the risk of sexually transmitted infection among the direct commercial sex workers in the area is intensely high. Condom use is seemingly ruled out. Thus, by the present study, an explorative investigation is carried out to explore more about the condom use among the direct commercial sex workers in Sanur. The study applies qualitative research design. A purposive sampling technique was implemented in selecting 15 informants. The 15 informants included the direct commercial sex workers, pimps, and customers. These informants were provided with in-depth interviews. The results of data analysis showed that during sexual intercourses not all the direct commercial sex workers applied the use of condoms. The leading reason was the male partners disliked the condoms in the sexual intercourse. However, it is also found that economic factor had given rise to avoiding the condom use. It should be noted well that using condoms during sexual intercourse decreases the growing number of the direct commercial sex workers.

Keywords
Condom, Sexually Transmitted Infection, Commercial Sex Workers, Sanur

Topic
Biology

Link: https://ifory.id/abstract/g4X7pjWRdx2L

Corresponding Author
Dian Saadillah Maylawati

Institutions
(1) Department of Informatics, UIN Sunan Gunung Djati Bandung, Indonesia
(2) Faculty of Information and Technology, Universiti Teknikal Malaysia Melaka, Malaysia

Abstract
One of the Natural Language Processing (NLP) studies that has been widely researched is automatic text summarization. There are a lot of techniques and methods that are proposed for text summarization. However, not much attention have been given on the coherence and cohesion in text. The aim of this study to present an idea to combine Sequential Pattern Mining (SPM) as text representation extracting algorithm and Deep Learning (DL) which is a powerful machine learning technique widely used recently in various data mining studies. This study uses descriptive research methodology that collects all of the facts and information which are related to SPM and DL for text summarization, where NLP as the body of knowledge, SPM and DL as the method, and text summarization as the domain problem that need to be solved. The findings of the study are presented as a logical framework diagram. The illustration of the logical framework can be implemented to further improve automatic text summarization results, in particular, to improve its coherence and cohesion.

Keywords
Data Mining, Deep Learning, Logical Framework, Natural Language Processing, Sequential Pattern Mining, Text Summarization

Topic
Computer Science

Link: https://ifory.id/abstract/N42dkbBFpwyv

Corresponding Author
Saddani Djulihenanto Djulihenanto

Institutions
State Polytechnic Of Malang

Abstract
One of attractive solution for PV ac-module is flyback-type micro inverter since it has a number of advantages include simple control, stable current injection and potentially low-priced technique. However, the typical flyback-type micro inverter would produce high voltage ripple in the DC-link. As a concequence, a high total harmonic distortion would likely be expected in the system. Therefore, a technique for minimising the total harmonic distortion within standard level is required. Generally, adding capacitor in the DC-link is usually considered as the solution to reduce the voltage ripple. This technique is not a cost-effective solution. Furthermore, the dimension of the inverter package will be bigger to have more space for additional capacitors. This paper proposes a control method to reduce harmonic level for flyback-type micro-inverter using Maximum Power Point Tracker (MPPT). The MPPT technique decribed in this paper used perturb and observe (P&O) method. This method is simple and yet highly efficient. Several experiments have been carried out to examine the effectiveness of the proposed method. The results show that the proposed method can reduce the harmonic level significantly. Moreover, the method can reduce the capacitance used in the DC-link of the flyback inverter.

Keywords
flyback-inverter, total harmonic distortion, perturb & observe, maximum power point tracker

Topic
Electrical Engineering

Link: https://ifory.id/abstract/grGvAWcbtZe9

Corresponding Author
Adam Malik

Institutions
Program Studi Pendidikan Fisika UIN Sunan Gunung Djati Bandung

Abstract
This research aims to develop methods of measuring the coefficient of viscosity using viscosimeter are analyzed using Newtons law of 1. The viscosimeter stormer came from the simple equipment modifications in the form of a hollow cylinder, laver, a pulley, a ruler, a stopwatch, burdens, taps, boards, iron rods, and rope. The trial results do indicate fairly accurate results with the reference. Furthermore, the equipment used, reaching a level of precision that is good at the moment in the trial to the school community. According to the trial results obtained the relationship between viscosity coefficients against time is inversely proportional. The resulting coefficient of viscosity is greater when the mass of the given object is getting bigger.

Keywords
Viscosimeter, Coefficient of Viscosity

Topic
Physics

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

Corresponding Author
vivi novia eka putri

Institutions
1Sport Education Departement, Universitas Pendidikan Indonesia
2Sport Science Departement, Universitas Pendidikan Indonesia
3Health and Recreation Departement, Universitas Pendidikan Indonesia

Abstract
Abstract Spike is the main weapon used in volleyball games. The purpose of this research was to determine the contribution of angle knee joint and angular knee flexion to ball speed. This research used a descriptive correlational method and purposive sampling technique. Samples of this study were 10 female volleyball athletes. The instrument used in this study was based on 2-dimensional analysis using kinovea software and radar speed gun to determine the speed of the ball. data analysis was processed using SPSS software version 23. From the results of data analysis there was a significant contribution between maximal speed shoulder to maximal shoulder abduction with a contribution value of 0.79 and sig 0.009 <0.01, and there was a significant contribution between maximal shoulder hyperekstention to maximal shoulder abduction with a contribution value of 0.80 and sig.0,008 <0.01.

Keywords
2D kinematic, spike, volleyball.

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/ZNF4CeX3DbYp