Indonesia Conference Directory

Corresponding Author
Isma Widiaty

Institutions
Universitas Pendidikan Indonesia

Abstract
The development of industrial revolution 4.0 in education has influenced students- learning styles, thinking patterns, and behaviors. One of which is related to the use of learning media. VRR Digi-Litikon, which is a part of Digi-Litikon Batik digital library, is an application used as Batik learning media. It is a platform of digitalized books, scientific works, and articles related to West Java Batik. It aims to enables students to acquire resources and literature on West Java Batik easily. It is also desgined to use Development Life Cycle (SDLC) method with waterfall approach. The results of the development of the application showed that the application has worked well on multiplatforms such as computers, desktops, laptops, smartphones, and tablets using internet connection. This application can display books, scientific works, and articles on Batik in the form of real books so that it gives interesting experiences to the students.

Keywords
Development; Virtual Reading Room (VRR Digi_Litikon); Learning; Batik

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/tXDEnp6c9BK2

Corresponding Author
S Sriadhi

Institutions
a) Faculty of Engineering, Universitas Negeri Medan, Indonesia
*sriadhi[at]unimed.ac.id
b) Faculty of Social Science, Universitas Negeri Medan, Indonesia

Abstract
The industrial revolution 4.0 demands universities to improve the quality of the graduates, while the competency standards have not yet been fully achieved. This study aims to build a virtual laboratory (V-Lab) as an independent practicum media through remedial learning. The development of V-Lab used the System Development Life Cycle (SDLC) model with the software Code Codeigniter and PHP 7.2, while the database used MySQL and PosgreSQL. The testing was done with Stub Testing, Unit Testing and inspection with Integration Testing for interactions between modules. The test results showed high feasibility in design, representation of user needs, reliability, security system, and the ease of the usage. The V-Lab is also able to increase the learning motivation of the students and have an impact on increasing student learning outcomes. While efficiency can be improved on the aspects of time flexibility, place of learning, facilities and cost savings because the learning is virtual. This study recommends V-Lab as an effective and efficient remedial learning through a virtual laboratory.

Keywords
virtual laboratory, remedial learning

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/GBUV4JdyZ7gY

Corresponding Author
Destriana Destriana

Institutions
3Pendidikan Jasmani dan Kesehatan, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Sriwijaya
Jalan Palembang-Prabumulih, Km 32 Inderalaya, kabupaten Ogan Ilir, 30662
Email: afrizal[at]fkip.unsri.ac.id1),hartati[at]fkip.unsri.ac.id2),destriana[at]fkip.unsri.ac.id3)

Abstract
This study aims to develop information and technology based test kits and ball-to-wall throwing measurements. This research was conducted at the FKIP UNSRI Health Information System 2018/2019 for the third semester students of the Palembang class. The research method uses the Research and Development (R & D) method using the method developed by Sugiyono. The stages of the research are needs analysis, product drafting, expert validation, small-scale trials, revisions, large-scale trials, phase 2 revisions, and product effectiveness tests. This research was carried out until the small-scale trial stage with the results of product draft validation with twice expert validation obtained results of 63.48% and the validation of the test and measurement experts obtained 68.75% results so that from the two validation results the products in the category were quite feasible to use . The next stage is a small-scale trial with 61.48% results in the category of "decent enough", so the product in the form of developing test kits and measuring ball-to-wall throwing can be used but must be revised first. The findings of this study resulted in a test and measurement of ball-to-wall throwing that can be used to find eye and hand coordination for students or athletes. The implication is that this tool can be used as a test and measurement tool that facilitates the test of throwing a ball into the wall.

Keywords
development tools, test and measurements, throw catch the ball into the wall

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/jYXzT7qNbcFP

Corresponding Author
Mimi Nur Hajizah

Institutions
Universitas Negeri Jakarta

Abstract
This research aims to develop a didactical design of learning about circle at junior high school, especially the relationship between central angle, length of arc, and area of segment of the circle. Developed didactical design consists of three activities obtained from three formal stages during the research process. The first stage is the analysis of the didactical situation before learning to obtain a hypothetical didactical design. Preparation of hypothetical didactical design is preceded by a preliminary study which includes the identification of obstacles student learning as well as the theoretical analysis and repersonalisasi. Identification of learning obstacle is conducted at a junior high school in South Jakarta involving 34 students of class IX by analyzing the results of the students answers on the questions provided, analyzing the results of interviews of teachers and students, as well as analyzing the textbooks used at the schools. The second stage is the analysis metapedadidaktic which is reflected in the design implementation. Design implementation is conducted at junior high school where a preliminary study done involving 36 students of class VIII. The third stage is the stage of reflection by conducting a retrospective analysis. This is done in order to obtain information for a revised design to produce empirical didactical design. The developed empirical didactical design allows for further development through the three stages of the same formal.

Keywords
didactical design; mathematics; learning obstacle; circle

Topic
Mathematics

Link: https://ifory.id/abstract/kQdexBfrAL76

Corresponding Author
ni putu diah witari

Institutions
a) Faculty of Medicine and Health Sciences, University of Warmadewa, Denpasar, Bali
*)diahwitari[at]gmail.com

Abstract
Escherichia coli is a Gram-negative bacterium that has a natural habitat in the human digestive tract. This bacterium besides being a normal flora can also be pathogenic. Escherichia coli is the most common cause of diarrhea. Guava leaves and bay leaves contain essential oils, tannins, flavonoids, and saponins which have antimicrobial effects. The purpose of this study was to determine the difference in the effectiveness of inhibition between ethanol extract of guava leaves and bay leaves on the growth of Escherichia coli bacteria. This type of research is an experimental laboratory. The inhibitory test was carried out by measuring the clear zone around the paper disc using callipers. The results of data analysis using one way ANOVA showed that there were significant differences between groups of extracts with F output = 49.83 and p = 0.00 (p&

Keywords
Escherichia coli, guava leaves, bay leaves

Topic
Biology

Link: https://ifory.id/abstract/W4THYdjRQc93

Corresponding Author
ginting Andarias

Institutions
Universitas Negeri Jakarta

Abstract
Abstract. The study aimed to determine the effect of anaerobic interval training, the difference in the increase in swimming speed between swimmers who have good and less arm muscle power, and the interaction effects of the three research variables. The study sample collected 24 people obtained by purposive sampling technique. The study was conducted by factorial 2x2 design. The research variable consisted of manipulative independent variables; Anaerobic interval training ratio 1:3 and 1:5. Independent variable attributes; arm muscle strength, dependent variable; 50 meter freestyle swimming speed. Data strength was obtained through full vertical arm test, swimming speed data with 50 meter distance test. The data analysis technique uses two-way ANAVA statistics with a significance level of α= 0.05. Research result; There is no significant difference between anaerobic interval training ratio 1:3 and 1:5 to increase the 50 meter freestyle swimming speed, as evidenced by the Fobs=1.19

Keywords
Anaerobic Interval, Working-Rest Time Ratio, Arm Muscle Power, Swimming.

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/bCWjte47cvGw

Corresponding Author
Dewa Ayu Putri Sri Masyeni

Institutions
Faculty of Medicine and Health Sciences, University of Warmadewa

Abstract
Nowadays, type 2 diabetes mellitus (T2DM) is the most prevalence of diabetes mellitus disease. In Indonesia 10 millions people suffering T2DM which caused Indonesia ranked seventh in the world and predicted to increase 16.2 millions patients on 2040. The use of oral antidiabetic drugs (OAD) like metformin and gliclazide still an option on T2DM therapy. This study aims to determine the differences in the effectiveness of metformin and gliclazide to lower blood glucose in patient T2DM in the sanjiwani gianyar hospital. The variable of this study is oral antidiabetic drugs and blood glucose. The design of this study using cross sectional analitic observational approach with retrospective study. The sample of this study is patient T2DM in internal medicine policlinic of Sanjiwani Gianyar Hospital from Januari-Desember 2016 with 160 subjects who selected through consecutive sampling and fulfil the inclusion and exclusion criteria. This study using secondary data in form of medical record. The data was analyzed by chi square test (α=0.05). The results was showed that the effectiveness of each OAD to decrease blood glucose for 3 months therapy, the used of metformin showed that (70%) 56 sample achieved controlled blood glucose while the used of gliclazide showed that (52.5%) 42 sample achieved controlled blood glucose and there was a significant differences in the effectiveness of metformin and gliclazide with p value is 0.035. The conclusions of this study is metformin more effective than gliclazide to lower blood glucose in T2DM outpatient and advices who gived to hospital, health workers and community.

Keywords
Type 2 diabetes mellitus, Effectiveness, Metformin, Gliclazide, Blood glucose

Topic
Biology

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

Corresponding Author
Rahmat ilahi

Institutions
Universitas Pendidikan Indonesia

Abstract
Information and Communications technology (ICT) has been widely applied in digital library services to improve the knowledge and the public interest. Researchers can easily obtain the information of interest through internet surfing. Digital libraries seek to provide prospective readership with alternative materials for reading. They also preserve the culture, customs that could be learnt by future generations. The utilization of digital libraries as learning resources include educational and community aspects. The purpose of this paper was to review and analyze the impact of a digital library system in education on potential readership.

Keywords
Learning resources, Digital Library, Education

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/FTa2X3CKQEeP

Corresponding Author
Andri Heriyandi

Institutions
UNIVERSITAS KOMPUTER INDONESIA

Abstract
The purpose of this study describes the analysis of the development of digital startup in the field of education, as well as the advantages of digital startups in the Learning Management System (LMS). This case study uses descriptive method, in order to conduct a separate search for groupings related to several variables studied. At the end of this research is to measure which digitality computer learning startup. By entering a digital startup, the learning process is done by using video learning, practice questions and discussions, and also a learning module that can be downloaded as a material for learning, a learning process that can be used effectively, can help time and place of learning.

Keywords
e-learning,Digital Start Up, LMS

Topic
Computer Science

Link: https://ifory.id/abstract/LUrPfcm9Naud

Corresponding Author
Muktiarni Muktiarni

Institutions
Study Program of Technological and Vocational Education, Universitas Pendidikan Indonesia
Jl. Dr. Setiabudhi No 229, Bandung, West Java, Indonesia 40154

*muktiarni[at]upi.edu

Abstract
This study synthesizes the findings of a study on the trend of digitalization of education in the face of the industrial revolution 4.0. Journal studied from 2015 to 2019. This paper focuses on the challenges and opportunities problem4.0 industry, industrial development 4.0 characterized by the development of big data and artificial intelligence (artificial intelligence). Skill is needed in this era or called big data and artificial intelligence, including advanced analytics, Internet of Things, and digital security. All areas of both education and industry in the world will be affected by the development of the industrial revolution 4.0,new patterns when disruptive technology (disruptive technology) are present so fast that all people, particularly education should be immediately adapt to industry developments 4.0.Education and industry should be able to develop the industry by considering the transformation starategi sector human resource competency in their field. It is a challenge for education in preparing human resources in order to adapt to the industry 4.0. Of the few studies that have been done Trend digitalization in education as one of the dominant solutions carried out in the face of the industrial revolution 4.0, it is in line with a new pattern that is found in industry 4.0 iedisruptive technology (disruptive technology).

Keywords
digitalisation, industry 4.0, technology, education

Topic
Computer and Communication Engineering

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

Corresponding Author
erna bagiari

Institutions
Department of Cardiology, Sanjiwani Hospital/ Faculty of Medicine and Health Sciences, University of Warmadewa

Abstract
Abstract The association between lack of thyroid hormones and cardiac dysfunction has been well described. We experienced a case of a 44-year-old woman with dilated cardiomyopathy (DCM) accompanied with long QT secondary to hypothyroidism and hypocalcaemia. Thyroid hormone acts on the myocardium of the heart and peripheral blood vessels. The genomic and non-genomic effects of thyroid hormone are associated with cardiovascular and chemodynamic function. A well documented but mostly overlooked sign in hypothyroidism is the prolongation of the QT interval. Long-QT syndrome, which is characterized by abnormal QT-interval prolongation on the surface ECG and an increased risk of sudden death, usually due to ventricular fibrillation. The mechanism of hypothyroidism on QT prolongation and the occurrence of ventricular tachycardia is unknown and the effect may be idiosyncratic, although coexistent.

Keywords
Delated cardyomyopathy; Long QT syndrome; Total Thyroidectomy

Topic
Biology

Link: https://ifory.id/abstract/UDrtz4yMVT37

Corresponding Author
Farid Triawan

Institutions
(a) Faculty of Engineering and Technology, Sampoerna University, Jakarta, Indonesia
* farid.triawan[at]sampoernauniversity.ac.id
(b) Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Bandung, Indonesia
(c) Research Center for Chemistry, Indonesian Institute of Science (LIPI), Tangerang Selatan, Indonesia

Abstract
Cavitation has been one of the critical issues in turbomachinery operation which often causes the reduction of service life of the components. In order to predict the service life, cavitation intensity (CI) needs to be measured accurately. In this paper, several notable developments of techniques to measure CI are reviewed briefly. Those techniques can be classified into two groups, i.e. direct and indirect measurements. For the indirect technique, a method which estimates the impact load of bubble collapse by inverse analysis is particularly elaborated. For the direct technique, a method which utilizes painting technique to quantify the actual CI is specifically presented. The advantages and disadvantages are also comprehensively discussed.

Keywords
Cavitation intensity; inverse method; paint erosion technique; direct and indirect method

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/Jug2EzmWFyjt

Corresponding Author
Rickard Elsen

Institutions
Sekolah Tinggi Teknologi Garut

Abstract
Disaster Management System (DIMAS) is used to reduce risk caused by disaster by manage information about affected area by disaster. It also manage aids, volunteers, and refugees data to measure effect of disaster accurately. Most of DIMAS controlled by government and operated by verified volunteers to keep data integrity so it can be accounted for future purpose. In this paper, we propose to apply DIMAS to mobile environment because of advantages that can be utilized to simplify the usage of DIMAS like GPS integration, mobility aspect, real time data capturing, etc. At the result, we hope it can improve accuracy and speed of collecting data in affected area.

Keywords
disaster management system, mobile environment

Topic
Computer Science

Link: https://ifory.id/abstract/2TznF48HaXEm

Corresponding Author
aji najihudin

Institutions
a) Fakultas MIPA, Universitas Garut (UNIGA), Garut, Indonesia
*ajinajihudin[at]uniga.ac.id

Abstract
Gelatin is a biopolymer derived from collagen proteins extracted from the skin or animal bones.The aim of this research was to formulated paracetamol tablets by using chicken feet gelatin, evaluated tablets and dissolution test. The preparation of chicken feet gelatin was done by an acid method using 4% HCl solvent. Preparation of paracetamol tablets using chicken feet gelatin and commercial gelatin was done by wet granulation method with the variation of binder concentration of 1.5%, 3%, and 4.5%. The granules, tablets, and dissolution tests were evaluated. Testing of in vitro dissolution of paracetamol tablets was done by paddling method in phosphate buffer pH 5.8 as dissolution medium. The yield of chicken feet gelatin obtained was 5.06%. The results of evaluation paracetamol granules and tablets showed that six formulas are qualify except for the friability of F1 and F2. Paracetamol tablets using chicken feet gelatin as binder showed a faster dissolution profile and qualify compared to commercial gelatin binders. Paracetamol tablets using chicken feet gelatin as the binder with a concentration of 4.5% (formula 3) showed the best results of tablets evaluation and in the 30th minute dissolve as much as 81.55%, it showed the best dissolution profile.

Keywords
Disolution, Paracetamol, chicken feet gelatin, wet granulation

Topic
Pharmacology

Link: https://ifory.id/abstract/jNcaryKt4BT3

Corresponding Author
Rickard Elsen

Institutions
Sekolah Tinggi Teknologi Garut

Abstract
Autograder is used to measure source code quality based on blackbox testing. It will compare source code execution result with existing test cases and generate grade based on comparation result. Autograder can be used in college to help lecturer to test students skill in programming. It can be applied in laboratory or online course so students can use it to test their skill. Most of autograder use centralized architecture which it just execute and grade only one request at a time so if students submit their code to test, it will create a long queue and can risk highly to cause timeout because of long queue and unexecuted request. In this paper, we propose to apply distributed architecture for autograder to reduce queue and lower the risk for unexecuted request that can cause error in grading.

Keywords
autograder, source code, distributed architecture

Topic
Computer Science

Link: https://ifory.id/abstract/3wmWbDc2ZHrE

Corresponding Author
Azwar Mudzakkir Ridwan

Institutions
(a) Electrical Engieering Departement UIN Sunan Gunung Djati Bandung Jalan A.H Nasution No 105, Bandung 40614, Indonesia
*azwarmudzakkirridwan[at]uinsgd.ac.id
(b)School of Energy, Bandung Institute of Technology
Jalan Ganesha 10, Bandung 40132, Indonesia

Abstract
HAPS (High Altitude Platform Station) is an alternative technology of communication system that utilizes terrestrial and satellite systems. HAPS technology is in stratosphere layer with a height of 17-22 km above the earths surface. HAPS has some advantages, which are wide range area, communication ability on line of sight (LOS), and low propagation delay. In this paper we present the comparison between single HAPS system and two HAPS diversity technique. From simulation result, it is evident that using two HAPS as a diversity technique gives better performance than the single HAPS system, that is two HAPS diversity technique requires less SNR than the single HAPS system, typically 3 dB less of SNR.

Keywords
HAPS, LTE, Space diversity, HAPS diversty.

Topic
Electrical Engineering

Link: https://ifory.id/abstract/t2hm3Y9FZKnA

Corresponding Author
Rahyuniati Setiawan

Institutions
Universitas Garut

Abstract
The background of this study is the decline in the tourist visits to Sabda Alam Water Park in Garut. Viral marketing plays an important role in raising brand awareness and may affect tourists intention to visit a tourism object. The purpose of this study was to examine the influence of viral marketing on brand awareness and tourists visiting intention. To this end, an explanatory survey was conducted on a sample of 100 visitors to Sabda Alam Water Park selected using a proportionate random sampling technique. Data analysis was performed using path analysis by means of SPSS 21. The results showed that viral marketing had significant positive influence on brand awareness. It was also revealed that brand awareness dan viral marketing had positive influence on tourists visiting intention.

Keywords
viral marketing, brand awareness, tourists visiting intention

Topic
Management Science

Link: https://ifory.id/abstract/2NdcLZF7R4KX

Corresponding Author
Nury Yuniasih

Institutions
Elementary School Teacher Education Study Program, Universitas Kanjuruhan Malang
Jalan S. Supriadi No. 48 Malang Indonesia
nuryyuniasih[at]unikama.ac.id
resitaeka04[at]gmail.com
cirn[at]unikama.ac.id

Abstract
Abstract The purpose of this study is 1) to develop DOMI KALI media, 2) to describe the feasibility of the DOMI KALI media, 3) to describe the practicality of the DOMI KALI media. The method used is adapted from the ADDIE model with four stages, namely: analysis, design, development and implementation. The subjects of the trial were the third grade students of Sumbersari Elementary School 2. The instruments of data collection used questionnaires, unstructured interviews, and documentation. The results showed that the DOMI KALI media is feasible to use. Assessment by media experts gets a percentage of 91.25%. Assessment by material experts received a percentage of 93.75%. Assessment by prospective users gets a percentage of 82.14%. Assessment of the results of student responses to limited field trials received a percentage of 95.61%. Based on the explanation of the results of the assessment, the DOMI KALI media is "Eligible" or "Very Good" to be used as a learning medium.

Keywords
Domi Kali, Multiplication, Elementary School

Topic
Mathematics

Link: https://ifory.id/abstract/L3VNev74tp9Y

Corresponding Author
Efri Sandi

Institutions
Department of Electrical Engineering, Universitas Negeri Jakarta
Jalan Rawamangun Muka Jakarta Timur, Indonesia 13220

Abstract
In this paper a parasitic radiator combination was developed to improve the gain performance and bandwidth of the S-Band frequency microstrip antenna. Previous studies focused on adding one side layer of the parasitic radiator and the same structure, so the idea emerged to develop a microstrip antenna by adding parasitic radiators from the two sides of the antenna radiator layer and the different structure of parasitic structure. In this paper, the design of the parasitic radiator is added by combining the circular parasitic radiator patch on the upper layer of the antenna radiator and the square parasitic radiator patch on the bottom layer of the antenna radiator. This study uses a research and development approach through the calculation of parasitic radiator structure and setting the distance between layers. Simulation and measurement results show that by adding a parasitic combination of radiators with a distance of 0.38 λ at the top layer and 0.15 λ at the bottom layer of the antenna, a better gain and bandwidth performance improvement is compared to the addition of parasitic radiator designs in previous studies.

Keywords
Double Layer, Circular Parasitic Radiator, Square Parasitic Radiator, Gain, Bandwidth.

Topic
Electronics Engineering

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

Corresponding Author
Tina Sri Sumartini

Institutions
Institut Pendidikan Indonesia Garut

Abstract
The quadratic function of the part of mathematics that is dynamic. This gives the meaning that drawing graphs of quadratic functions can use a variety of different ways. The purpose of this study is to find out various ways of presenting graphs of quadratic functions. The sample of this study took two respondents who had learned quadratic function material. The study was conducted qualitatively by analyzing the way the graphs of quadratic functions are presented. The results showed that the effectiveness of drawing quadratic functions is influenced by the ability to think creatively

Keywords
Quadratic Functions, Creative Thinking

Topic
Mathematics

Link: https://ifory.id/abstract/mhUy3wutMDLn

Corresponding Author
Indriyati Hadi Sulistyaningrum Sulistyaingrum

Institutions
a. Doctoral Student, Faculty of Pharmacy, Gadjah Mada University, Indonesia
b. Pharmacy Department, Faculty of Medicine, Sultan Agung Islamic University, Semarang, Indonesia.
c. Department of Pharmaceutics, Faculty of Pharmacy, Gadjah Mada University, Indonesia.
d. Faculty of Medicine, Nursing, and Public Health, Gadjah Mada University, Indonesia

Abstract
This study aimed to analyze the capitation payment utilization and expenditure of drug costs in public and private primary health care. This study was a cross-sectional study with a quantitative approach in Yogyakarta province, Indonesia. The most prevalent diseases found based on the type of primary health care was pulpitis (12.5%) while in private primary health care was an acute upper respiratory infection (13.5%). Characteristic of patients visited was female (68%), 46-55 age group (17%). The cost used in health services were IDR 16,093 (77%) for patient examination and services and IDR 5,097 (23%) for the drug. There were statistically difference for total cost of three diseases, including hypercholesterolemia (p=0.008); acute upper respiratory infection (p= 0.023); and functional dyspepsia (p= 0.015). The highest drug cost based on diseases was refractory anemia (IDR 18,885). The proportion of drug cost was about 23% of the total capitation fund received by PHCs. Drug costs in the capitation system at the private first level health facilities tend to be higher than in the public facilities. Moreover, it is lower than the international standard suggested by WHO. It is recommended to evaluate the capitation system especially the rational proportion of health expenditure to enhance the quality of care.

Keywords
capitation system, drug cost, primary care, universal health coverage

Topic
Management Science

Link: https://ifory.id/abstract/BCnW2dzXGDKm

Corresponding Author
Sri Rahayu

Institutions
Department of Informatic Engineering, Sekolah Tinggi Teknologi Garut, Jl. Mayor Syamsu No. 1, Garut 44151, Indonesia

Abstract
Along with the development of technology that enters all walks of life including agriculture provides an opportunity for farmers to be able to trade agriculture directly because of the problems that occur in the distribution of agricultural products for quite a long time so that they are directly in hand. Consumers sometimes make farmers quite disadvantaged because they get income that is not comparable if sold directly to consumers (end users). But the limited space and lack of information make it a problem for farmers to sell it directly. E-commerce is one solution to this problem. E-Commerce is a forum that brings together sellers and buyers in buying and selling transactions directly using online electronic devices. The software development methodology used is the XP (Extreme Programming) method. The results of this study are in the form of e-commerce applications that can be used as a medium for promotion, communication, information and provide direct benefits to farmers and consumers. The application testing technique using the Black-Box Testing method is Equivalence Partitioning. The results of the study used a user questionnaire that the application had a percentage value of 88.84% included in the excellent category.

Keywords
AGRICURTURAL; E-COMMERCE; MARKETPLACE; XTREME PROGRAMMING

Topic
Computer Science

Link: https://ifory.id/abstract/fXrcv7VhUALx

Corresponding Author
INTAN PERMANA

Institutions
Universitas Garut

Abstract
Brand advocacy ratio is one of the marketing productivity measures that can be applied in various industries. In the present study, the authors examined the role of ecommerce in raising customers brand awareness, encouraging purchase, and promoting the brand of Apple in Asia. This study was conducted through a survey on 30 respondents. It was revealed that Google-s search engine managed to raise the Apple brand awareness to the highest level, namely top-of-mind awareness. In addition, the availability of Apple-s products in marketplaces such as Amazon, Shopee, and Lazada was proven to promote sales in Asia. One of its websites www.support.apple.com was proven to increase its brand advocacy ratio because of its comprehensive product information, help service, and information on the nearest Apple-s stores. In today-s digital era, marketing productivity in the form of brand advocacy ration could be improved by search engines (e.g., Google), marketplace (e.g., Amazon, Shopee, and Lazada), and corporate websites.

Keywords
e-Commerce; Marketplace; Website; Brand awareness; Purchasing; Brand advocacy ratio

Topic
Management Science

Link: https://ifory.id/abstract/h2LzNqtdfAYk

Corresponding Author
Rian Oktariana Firmansyah

Institutions
(1) Post-Graduate Studies School, Universitas Pendidikan Indonesia
(2) Technology and Vocational Education Faculty, Universitas Pendidikan Indonesia

Abstract
This article aims to design e-job sheet based an android as a learning media for Competency-based training in line with the demands of the industrial revolution 4.0. The focus of this article is on the challenges of learning in the industrial revolution 4.0, the character of students, and the framework of the e job sheet model. The method used in this e-Worksheet study is Research-Based Design which consists of four main stages, are identifying problems to be examined, designing solutions to problems, repetitive cycles, and reflections. The results of the study show that the learning media must keep up with current technological developments and are easy to use according to the target character of the user. The e-jobsheet application is considered appropriate to be used as a practical guidance in competency-based training that can be operated online and offline. E-job sheet consists of simulation videos that are packaged per segment based on practical stages, are interactive and all activities in the application can be documented.

Keywords
E-job sheet, practical guidance, android, industrial revolution, design based research

Topic
Computer and Communication Engineering

Link: https://ifory.id/abstract/rTKCf4Q7EH6V

Corresponding Author
izzil muhiqqin

Institutions
State Polytechnic Of Malang

Abstract
Sending secret message need an algorithm that can protect message to receiver without knowing by other and keep the originality of message. Previous research, encoding secret message in video inserted in frame while audio secret message inserted in bit audio. In this paper, try to encode the secret message at video file to encode in audio. Audio separated from video in order to encode secret message in audio. Echo Hiding method used in encode secret message to audio process. Testing use Bit Error Rate (BER) method to analysis modification in audio and Normalized Correlation (NC) analysis authentic the secret message. Based on experiment, message inserted in audio more authentic on mono audio channels than stereo audio channels.

Keywords
echo hiding,secret message,sending message

Topic
Computer Science

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

Corresponding Author
Trisina Simanjuntak

Institutions
Departemen Pendidikan Teknik Elektro, Fakultas Pendidikan Teknologi dan Kejuruan, Universitas Pendidikan Indonesia

Abstract
Economic Dispatch (ED) is an important problem in power generation and transmission systems. The main goal of this study is to get generation scheduling with the lowest operating costs as possible to satisfy the load demand. PSO mimics the behavior of individual in a population, which in this case, is the characteristic of six thermal power plants of interconnection system Java-Bali 500 kV. Then, Pareto Archive will provide the solutions for multiarea system. The results obtained from combining the two methods is better than the conventional methods. The more efficient the optimization results, the smaller operating costs will be incurred.

Keywords
economic dispatch; PSO; Pareto Archive; thermal power plant; operating costs

Topic
Electrical Engineering

Link: https://ifory.id/abstract/E8KXHy3WcvuP

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
Ramen Antonov Purba

Institutions
a)Manajemen Informatika, Politeknik Unggul LP3M
Jl. Iskandar Muda No. 3 CDEF, Medan - North Sumatera Indonesia
*ramen_purba[at]yahoo.com
b)Manajemen Informatika, Politeknik Unggul LP3M
Jl. Iskandar Muda No. 3 CDEF, Medan - North Sumatera Indonesia
c)Manajemen Informatika, Politeknik Unggul LP3M
Jl. Iskandar Muda No. 3 CDEF, Medan - North Sumatera Indonesia
d)Manajemen Informatika, Politeknik Unggul LP3M
Jl. Iskandar Muda No. 3 CDEF, Medan - North Sumatera Indonesia

Abstract
Image is an interesting object. Because image can be processed even manipulated. Image can not be separated from computer. With computer images can be processed so the value increases. Many computer applications can used to process images. Image development is so rapid. But it does not touch children. There are lot of books that can be used as references for children but not yet very interesting ones. By using computer technology image will more quality and beneficial for children. There must be innovation to change the dynamics. Edge detection concept combined with computerized based methods can be a solution. Edge detection can be used to recognize patterns from image. Edge detection can identify the image edge. In this study will be designed edge detection system using laplace operators and convolution techniques. The initial image will be constructed so that a pattern in the form of dots will be formed.

Keywords
convolution; digital image; edge detection; laplace

Topic
Computer Science

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

Corresponding Author
Sitti Nursetiawati

Institutions
a, b) State the University of Jakarta, Faculty of Engineering, Cosmetology Education, East Jakarta, Rawamangun 13220
*sitti-nursetiawati[at]unj.ac.id

Abstract
Saponification is the chemical reaction process of fatty acids with KOH, KK2CO3, NaOH, and Na2Co3 so as to produce soap with carbonyl salt content. One of the benefits of saponification is creating a product that can produce economic value. This research was conducted using a quantitative method involving 50 respondents from housewives who received material to training related to making body soap. The research location was chosen purposively. The results of the study stated that (a) saponification soap made can be used for the body, but it is not suitable for use as a facial soap. Because, the pH content of the face and the saponification of soap need to be adjusted, including the ingredients suitable for facial skin, (b) further research is needed regarding natural preservatives and skin safe, so that the saponification soap is durable, (c) soap making with saponification techniques that are quite easy to apply, (d) there is a relationship between soap-making education and the high interest in housewife entrepreneurship, and (e) what is needed to increase the entrepreneurial interests of housewives is the practice of packaging products to the distribution chain. Keywords: Saponification techniques, body soap, education, entrepreneurship

Keywords
Saponification techniques, body soap, education, entrepreneurship

Topic
Industry Engineering

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

Corresponding Author
Anggara Budi Susila

Institutions
Department of Physics, Faculty of Mathematics and Natural Science, State University of Jakarta, Jakarta 13220.

Abstract
We study of effecs Al-Cu-Mg/SiCp Metal Matrix Compsite (MMCs) with a matrix composition of 4.4 wt% Cu, 1.8 wt% Mg with SiCp fillers were varied (3.4; 3.7 and 4.0) wt% and the remaining Al. SiCp is mixed into Al-Cu-Mg heated at 900oC, then stir casting is carried out at 250 rpm for 10 minutes. Then cooling are carried out to room temperature. After cold, heat treatment is given and continued testing. The SEM-EDX and XRD test results showed that the increasing SiCp content, the tendency for SiCp and Mg bonds to form the Mg2Si phase increased, making the sample items enlarge and appear more coarse. While the corrosion rate test of increasing SiCp in the Al-Cu-Mg matrix makes Al-Cu-Mg/SiCp samples tend to be more corrosion resistant. The event of declining corrosive properties is due to SiCp particles occupying grain boundary areas replacing O2 (which provides corrosive properties) that are trapped in the sample during the cooling process.

Keywords
Al-Cu-Mg/SiCp casting stir, SiCp filler, corrosion rate

Topic
Physics

Link: https://ifory.id/abstract/pbgktG9jc2Eh