Indonesia Conference Directory

Corresponding Author
Hamdan Sugilar

Institutions
1 Department Mathematics of Education, UIN Sunan Gunung Djati Bandung
2 Department Mathematics of Education, Universitas Pasundan

*rahayu.kariadinata[at]uinsgd.ac.id

Abstract
The purpose of this study was to determine the differences in the increase in students spatial thinking abilities; differences in achievement of spatial thinking skills based on students Early Mathematics (PAM) knowledge; and the difference in increasing the mathematical character of students between before and after mathematics learning using the Cabri 3D software with a scientific approach. This study uses quasi-experiment, the experimental class uses Cabri 3D software with a scientific approach and the control class uses conventional learning. The results showed that: there were differences in the increase in spatial thinking skills; there are differences in achievement of spatial thinking skills based on PAM and there is interaction between PAM categories of students with learning in achieving students spatial thinking skills; there is a difference in the improvement of students mathematical characters between before and after mathematics learning using the Cabri 3D software with a scientific approach. Mathematics learning using Cabri 3D software with a scientific approach is one alternative to improve spatial thinking skills and mathematical character of students

Keywords
scientific approach, spatial thinking, mathematical characters

Topic
Mathematics

Link: https://ifory.id/abstract/yxjDw4aKQURp

Corresponding Author
Rita Ambarwati

Institutions
a) Department of Magister Management, Universitas Muhammadiyah Sidaorjo, Indonesia
*ritaambarwati[at]umsida.ac.id

b) Department of Magister Management, Universitas Muhammadiyah Sidaorjo, Indonesia

c) Department of Computer Engineering and Informatics, Politeknik Negeri Bandung, Indonesia

Abstract
The use of e-Samsat services as a means to facilitate the process of paying motor vehicle tax has not made a significant contribution. This is due to the lack of introduction to the community, especially in the East Java region, that the benefits of e-Samsat can be used optimally. This study aims to analyze the factors that influence the use of e-Samsat services. this research can provide recommendations to policy makers to improve East Java e-Samsat services, especially payment for Motor Vehicle Taxes. Methods of collecting data by distributing questionnaires, and analyzing data using the Structural Equation Modeling (SEM) approach using variables such as Trust, Awareness and Intention to Use. The results of the study show that the Trust and Awareness variables directly or indirectly affect the intention to use East Java e-Samsat services.

Keywords
E-Samsat service; Citizen Trust; Awareness; intention to use

Topic
Management Science

Link: https://ifory.id/abstract/KukXzmRZ2bFP

Corresponding Author
Abdul Syukur

Institutions
1)Postgraduate Program of Science Education, Mataram University
2)Department of Sciences Education, Faculty of Teacher Training and Education, Mataram University
12*Correspondent Author: Abdul Syukur, syukurbiologi[at].unram.ac.id.

Abstract
Coastal ecosystems consisting of mangrove ecosystems, seagrass beds and coral reefs have the potential to be developed as ecotourism. Seagrass ecosystems located in the intertidal zone are an integral part of coastal tourism in the area of study. However, its existence has not received serious attention as a component of coastal ecotourism that can contribute to ecological services. This article aims to start an effort towards empowering this potential through the study seagrasses ecology to formulate the potential of ecological services in supporting the development of ecotourism. Data collection were done through observation, survey and questionnaire methods, and data analysis were done descriptively. The analysis showed that the potential of seagrass community tourism services can be grouped into three parts, namely: (1) seagrass community that form seagrass beds in each tourist location, (2) the diversity of species of biota associated with seagrass can be enjoyed by tourists and (3) seagrass community area can be the location of snorkeling at the time of high tide. The conclusion of the study is that the existence of seagrass ecosystems can provide added value from aspects of environmental services in the development of ecotourism in the southern coastal region of Lombok Island.

Keywords
Seagrass ecosystem, Development of coastal ecotourism, Ecologycal services

Topic
Biology

Link: https://ifory.id/abstract/ZuntNJY9jF7Q

Corresponding Author
Putu Nita Cahyawati

Institutions
a) Department of Pharmacology and Pharmacy, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia
*putunitacahyawati[at]gmail.com
b,c,d) Department of Physiology & Biochemistry, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia
e) Department of IKK-IKP, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia

Abstract
Loloh is a traditional Balinese drink that is believed to be able to overcome certain diseases. The Balinese people make "loloh" independently for self-consumption or trading in small-scale home industry. The making of "loloh" is usually passed down from generation to generation. So, the outstanding circulation has not been standardized and with different ingredients. "Loloh cemcem" is one of the traditional drinks from The Penglipuran Village, Bangli Regency, Bali. This study aims to conduct phytochemical tests on "loloh cemcem" in Bali, especially from Penglipuran Village. Phytochemical tests include levels of alkaloids, steroids, terpenoids, phenolics, saponins, flavonoids, and tannins. The results of this study indicate that "loloh cemcem" produced in Penglipuran Village contains moderate levels of flavonoids and terpenoids (642.88 mg/100g), containing tannins, phenols, and alkaloids. In conclusion, "loloh cemcem" has the potential to be an antibacterial, antioxidant and another benefit that still needs further investigation.

Keywords
loloh cemcem, Bali, flavonoids, terpenoids, antioxidant

Topic
Pharmacology

Link: https://ifory.id/abstract/EJKRA76cN9Vx

Corresponding Author
Gemintang Bening Segara Asri

Institutions
Industrial Engineering, Faculty of Engineering and Technology, Sampoerna University, Jakarta

*tika.lestari[at]sampoernauniversity.ac.id

Abstract
Quality Control is an activity to maintain and direct to quality company product (and) services which can maintain the existence of the product in the long term period. In this study, we used the application of the Hotelling T2 Control Chart and Statistical Quality Control (SQC) to control the quality of bread production. Hotelling T2 Control chart is the type of multivariate control chart that is used to monitor the process of identifying the causes of variance and improve the process. In the application of the Hotelling T2 Control Chart, we used three major characteristics of quality, those are expiry, packaging, and price. The second method, Statistical Quality Control, is using the control charts of the cause-effect techniques and diagrams in quality control to minimize the rejected products. Based on the identification the number of products that fail is still within reasonable limits located between UCL and LCL. The main cause of the signal out of control is the packaging of the product. As the endeavor improvement from the company, the production process is increasing in the second phase.

Keywords
Hotelling T2, Control Chart, Statistical Process Control

Topic
Industry Engineering

Link: https://ifory.id/abstract/mJDaQL3Pv6HK

Corresponding Author
Arie Wardhono

Institutions
Department of Civil Engineering, Universitas Negeri Surabaya, Kampus Unesa Ketintang, Surabaya 60231, Indonesia
ariewardhono[at]unesa.ac.id

Abstract
The use of fly ash as cement replacement material in geopolymer is able to overcome the environmental problems caused by the cement production process. One type of fly ash that is widely used is class C fly ash which has a high calcium content. However, the main issue of this materials is the low silicate content which is required in forming geopolymer matrix. The use of zeolite which has a high silicate content is one alternative to overcome this problem. This research aims to identify the effect of zeolit addition in strength of high calcium class C fly ash geopolymer mortar. The ratio of zeolit to fly ash was 5% : 95%, 10% : 90%, 15% : 85%, 20% : 80%, and 25% : 75%, respectively. The specimen was developed using the blended 12 molar NaOH and sodium silicate at room temperature. The results showed that the combination of 95% fly ash and 5% zeolit gives the highest compressive strength. The zeolit significantly affects the strength development rate of geopolymer and accelerates the setting time rate. This can be concluded that the mix of class C fly ash and zeolite can provide an alternative in geopolymer production at room temperature.

Keywords
Geopolymer mortar; High Calcium Class C fly ash; Zeolit; Strength properties; Setting time

Topic
Civil Engineering

Link: https://ifory.id/abstract/TAU3vaHudytx

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
Retty Handayani

Institutions
Faculty of Mathematics and Natural Sciences, University of Garut
Jalan Jati No. 42B, Garut 44151, Indonesia
rettyhandayani[at]gmail.com

Abstract
Java preanger arabica (Coffea arabica L.) coffee is a specialty coffee from Priangan, one of which is efficacious as a natural fragrance. The essential oil content in java preanger arabica (Coffea arabica L.) coffee beans includes Abhexon, Furaneol, Sotolon, Pentandion. The purpose of this study is to find out what percentage of the concentration of coffee extract gives a good aroma, how to formulate a safe and stable body splash preparation. The research methodology began with material collection, determination, making coffee roasting, soxletation with ether solvents, dosage formulations made with concentrations of one percent, three percent, six percent and evaluations including organoleptic testing, pH, viscosity, quality testing of body splash preparations (test spredibility, endurance test, spot test, adhesion test), irritation test, preference test, sharpness test and preference test. The evaluation results showed that the formula of body splash preparation with the concentration of three percent java preanger arabica (Coffea arabica L.) coffee oil was a safe, stable and preferred aroma because it was not too stinging and did not cause stains on clothes

Keywords
Java preanger arabica coffee bean oil; body splash; natural fragrance

Topic
Pharmacology

Link: https://ifory.id/abstract/w46eytZkMn3Y

Corresponding Author
Desyani Ambarwanti

Institutions
(1)Program Magister Pendidikan Fisika, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun muka no. 01, Rawamangun, Jakarta Timur 13220, Indonesia
(2)Laboratorium kontrol, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun muka no. 01, Rawamangun, Jakarta Timur 13220, Indonesia
(3)Program Studi Fisika, FMIPA, Universitas Negeri Jakarta, Jl. Rawamangun muka no. 01, Rawamangun, Jakarta Timur 13220, Indonesia

Abstract
Physics learning is taught to equip students with knowledge and understanding of various natural phenomena. In order to improve comprehensive understanding of waves principle for student class of XI, we implement science, technology, engineering, and mathematics (STEM) in physics learning by using theremin based light dependent resistor (LDR). In this paper, theremin as music instrumental non-contact will be used as teaching aid. Physics understanding of the students will be observe and investigated during a class. Analyses will be focus on adjustment of frequency will provide pitch of tones. As results, by theremin, student will have better understanding of waves principles.

Keywords
Theremin, STEM, LDR, Frequency, waves

Topic
Physics

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

Corresponding Author
Undang Syaripudin

Institutions
a) UIN Sunan Gunung Djati Bandung, Indonesia
b) Department of Information Communication Technology AeU, Malaysia

Abstract
This study presents a discussion of the tridharma-based university knowledge portal model (education, research, and community service). This study aims to ensure that lecturers activities are in accordance with the tridharma of higher education and national standards of higher education. The analytical method used is the literature review, with the object of research being hypothetical colleges in the form of universities. Based on the results of the identification of university needs, the knowledge portal model is required to have the ability to develop lecturer competencies in accordance with the tridharma of higher education. Knowledge portal is designed to have the ability to manage knowledge well, by providing facilities: information gathering, information categorization, information distribution, information collaboration, information retrieval, and knowledge sharing.

Keywords
knowledge portal, knowledge sharing, information retrieval

Topic
Computer Science

Link: https://ifory.id/abstract/XgYu3KQwRrxN

Corresponding Author
Hana Catur Wahyuni

Institutions
Universitas Muhammadiyah Sidoarjo

Abstract
SMEs are an important economic element in Indonesia. One of the products produced by SMEs is food. On the other hand, the development of consumer knowledge on food quality is increasing rapidly. These conditions require producers to provide quality food. Foods that meet the elements of food safety is one form of quality assurance for consumers. Therefore, producers need to know the extent of the consumers perspective on food safety. This study aims to determine consumer perceptions of the level of importance of food safety aspects. Especially in the process of selecting / buying food. The study was conducted using a questionnaire consisting of two parts. The first part is a questionnaire to find out the identity of the respondent, second questionnaire to determine the level of importance of food safety by consumers. Questionnaire consists of seven questions. Questionnaires were distributed online in February 2019. Data processing was carried out using descriptive statistics. This study consisted of 217 respondents from men (41%) and women (59%). The results showed that 75.6% of respondents rated food safety aspects as very important in the process of buying food. 66.8% considered food safety aspects to be closely related to food quality. 75.5% of respondents rate strongly agree to know the elements contained in food. 65% of respondents rate strongly agree to know that food is produced in a good manufacturer. 56.2% of respondents rate strongly agree that food must be distributed in a good transportation to ensure food safety. 57.1% Respondents considered strongly agree to pay attention to food safety aspects in the sales process. 48.1% Respondents agree that food safety certification is a guarantee that the food is safe and lawfully consumed.

Keywords
Food safety, SMEs, quality, supply chain, Consumer

Topic
Industry Engineering

Link: https://ifory.id/abstract/uqEUtGdc2X3v

Corresponding Author
Hamdan Sugilar

Institutions
1 Department Mathematics of Education, UIN Sunan Gunung Djati Bandung
2 Department Physics of Education, UIN Sunan Gunung Djati Bandung

* hamdansugilar[at]uinsgd.ac.id

Abstract
The purpose of this study was to determine the ability of the mathematical structure sense and attitudes of students through learning with construct 2 and sticky notes. The design of this study was Quasi Experimental with a nonequivalent control group design model, the research subject of The first semester biology of education students who were studying elementary mathematics. The results showed that the low ability of students mathematical structure sense was caused by several factors including the low response of elementary mathematics learning students 43.24%, low ability of student symbol sense of students are 51, 64%, construct 2 needs to be developed to respond to students who have basic math learning difficulties 63.21%, and 74.56% of students state that sticky notes are easier to apply, understandable and more practical. The ability of the structure is influenced by the learning model and the media used

Keywords
Structure sense mathematics, instructional Media

Topic
Mathematics

Link: https://ifory.id/abstract/FGvgHa3jyRY4

Corresponding Author
Hedi Cupiadi

Institutions
a) Faculty of Social and Political Sciencies, Garut University, Jl. Samarang 52, Garut, Indonesia
b) Faculty of Economy, Garut University, Jl. Samarang 52, Garut, Indonesia
(c) Faculty of Social and Political Sciencies, University of General Achmad Yani, Jl. Terusan Jenderal Sudirman,
Cimahi, Indonesia
* hedi.cupiadi[at]uniga.ac.id

Abstract
Posyandu activities have a role necessarily to support the public health services. In addition, Posyandu expected to further smoothly with the application of information systems posyandu (e-Posyandu) adaptability by a factor as one of the technological rapidly. The research purpose is to identify the effect of the implementation of the e-Posyandu on improving the performance of Posyandu cadres. This research uses a descriptive and associative method, with the sample of 96 cadres by the data collecting technique uses questionnaire surveys and interviews. The processing data uses validity and reliability test have the results of the correlation value above 0.50 so that all indicators are valid. The data analysis technique uses simple linear regression. The results showed that e-Posyandu had a significant effect on the performance of cadres. So, the application of e-Posyandu very helpful the performance of Posyandu cadres in the process of public health services.

Keywords
Information Systems, e-Posyandu, Performance.

Topic
Management Science

Link: https://ifory.id/abstract/VYf2Ev8BQNmL

Corresponding Author
Putu Nita Cahyawati

Institutions
a) Department of Pharmacology and Pharmacy, Faculty of Medicine and Health Sciences, Warmadewa University, Bali, Indonesia
*putunitacahyawati[at]gmail.com

Abstract
The kidneys are organs that play an important role in maintaining the balance of body fluid and removing metabolic waste products. The incidence and prevalence of kidneys disease continue to increase throughout the world. Various conditions can cause failure of kidney function. Acute kidney failure (ARF) can increase the risk of chronic kidney failure. The severity of the disease, duration, and frequency of ARF are predictive factors that are important for the patients condition. This study aims to compare the degree of kidney damage based on tubular injury scores in acute and chronic renal failure conditions using an experimental model of ischemic reperfusion injury and renal ablation. Eighteen male Swiss mice will be grouped into 3 treatment groups: the sham operation group (SO, n=6), the ischemic reperfusion injury group (IRI, n=6), and the renal ablation group (RA, n=6). Kidney tissue was stained with hematoxylin-eosin (HE) and tubular injury scores were assessed blindly. This study found that there were significant differences in tubular injury scores between the SO groups (0.43 pm 0.49) and RA (3.6 pm 0.70), but there were no significant differences between the SO groups (0.43 pm 0.49) vs IRI (2.23 pm 0.55) and IRI (2.23 pm 0.55) vs RA (3.6 pm 0.70). Based on the results it can be concluded that there are no differences in tubular injury scores between the ischemic reperfusion injury and renal ablation condition.

Keywords
tubular injury, ischemic reperfusion injury, renal ablation

Topic
Pharmacology

Link: https://ifory.id/abstract/4H8QgbWrUV6u

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
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
BAIQ EWIK JINIARTI

Institutions
a)Magister Program of Science Education, University of Mataram, 62 Majapahit Street , Mataram, Indonesia
b)Departement of Physics, University of Mataram, 62 Majapahit Street, Mataram, Indonesia

Abstract
Type of research is research and development. This development research aims to produce physics learning device using qualified problem based learning assisted by virtual experiment has a valid, practical, and effective which to increase students generic science skills in subject of optical instruments. Learning device is guided teacher in learn process at class. In this study, the generic skills that discussed on the science field, called generic science skills. The development model had used four D model consisting of define, design, develop and dessiminate phases. Trial of product conducted in students of eleventh grade of the senior high school one east Praya. The method used was pre experiment with one group pretest posttest design. The instruments were validation sheet and observation sheet. The results of the define phase are obtained through curriculum, student analysis, task anlysis, procedural analyisis, concept and specifying instructional The results of the design phase is derived from the design of learning devices model problem based learning assisted with virtual experiment. The result of develop phase based on validation process which obtained data from validator assesments of the lesson plan, students worksheet, learning materials, and test of generic science skills with very valid category.

Keywords
problem based learning model; virtual experiment; generic science skills

Topic
Physics

Link: https://ifory.id/abstract/9N6EATkzdZuc

Corresponding Author
Lalu Zulkifli

Institutions
1)Deparment of Science Education, Faculty of Teacher Training and Education
Mataram University
*)Corresponding author : lalu_zulkifli[at]unram.ac.id

Abstract
Mangrove plants are widely used traditionally in treating various types of infectious diseases in the people of Lombok Island. This study aims to isolate and characterize endophytic bacteria from the roots, stems, leaves and fruits of mangrove Rhizophora mucronata Lam. which grows in Gili Sulat, and to determine their antibacterial activity against some patogenic bacteria, such as Escherichia coli, Staphylococcus aureus, Bacillus cereus and Pseudomonas aeruginosa. Media used for isolation were NA and TSA. Antibacterial activity tests were carried out with well diffusion methods, and the level of antibacterial activity refers to the category according to Vasanthakumari. Characterization of endophytic bacteria includes morphological of colonies, cell morphology, physiology. Eighteen (18) endophytic bacteria isolates were obtained. Results showed that 12 isolates of endophytic bacteria had moderate (8-12mm) to strong category (> 12mm) of their antibacterial activity against B. cereus and P. aeruginosa. Isolate of NBM2(1) gave the strongest antibacterial activity against B. cereus. It can be concluded that endophytic bacteria isolated from mangrove R. mucronata Lam. is highly potential to be developed as a new antibacterial source, especially against B. cereus pathogenic bacteria.

Keywords
Endophytic bacteria, Antibacterial activity, R. mucronata Lam..

Topic
Biology

Link: https://ifory.id/abstract/qwEQA2rzTNnB

Corresponding Author
Dian Rahadian

Institutions
a) Institut Pendidikan Indonesia Garut, Jalan Pahlawan No.32 Sukagalih Tarogong Kidul, Garut 44151
*dianrahadian[at]institutpendidikan.ac.id
*dianrahadianpti[at]gmail.com

Abstract
This study aims to develop an online learning design to increase the active role of students in e-learning, based on the initial data obtained from the blended learning process in information technology introductory courses in the first semester of the 2018-2019 academic year at the Indonesian Education Institute. Active users in online classes for one semester are 94% with a variety of activities in it, starting from the role of students using teaching materials provided by lecturers, utilizing discussion forums to work on understanding questions or just discussions between lecturers and students, or students with other students. Research begins with conducting a needs analysis and design to define student needs in online learning based on learning outcomes in the course. The results of the analysis are in the form of design content that will be further designed according to the research and development method. The finished learning design is then validated by several experts, namely software development expert, and learning experts so as to produce a blended learning model. The results of the study show that online learning design needs are very high.

Keywords
Online Learning Design

Topic
Computer Science

Link: https://ifory.id/abstract/NLXFjHfVzZ8n

Corresponding Author
Robbi Rahim

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

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

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

Topic
Computer Science

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

Corresponding Author
Tri Handayani Kurniati

Institutions
a) Biology Study Program, Faculty of Mathematics and Natural Sciences, Jakarta State University.
Jl, Rawamangun Muka, Rawamangun,. East Jakarta 13220. Indonesia.
b) Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University.
Jl. Raya Darmaga, Bogor16680, West Java. Indonesia.
c) Department of Industrial Technology, Faculty of Agriculture Technology, Bogor Agricultural University
Jl. Raya Darmaga, Bogor 16680, West Java. Indonesia.
d) Department of Biology, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University.
Jl. Raya Darmaga, Bogor 16680, West Java. Indonesia.

Abstract
Anthracene, together with other polycyclic aromatic hydrocarbons (PAHs), is a persistent and toxic soil contaminant because its low water solubility and high hydrophobicity. The effectiveness of PAH degradation could be enhanced by using biosurfactant. In this study, we isolated bacteria that were able to degrade anthracene and also produce biosurfactant. Samples were taken from oil contaminated soil at Jakarta Bay. Isolation was done in a Minimal Salt Medium (MSM) supplemented with 1% crude oil. Screening methods for biosurfactant production include Blood Hemolysis, Drop Collapse Assay and Oil Displacement Assay. Three isolates which have biosurfactant production and anthracene degradation capability was identified based on 16SrRNA gene. These isolates were identified as Ochrobactrum intermedium AMA9, Ochrobactrum tritici CHA60, and Pseudomonas stutzeri CRA7. Based on GC-MS analysis, Ochrobactrum intermedium AMA9 showed high ability to degrade 84,79% anthracene in liquid MSM medium supplemented by 100 ppm anthracene after seven days incubation.

Keywords
anthracene; bacteria; biosurfactant; degradation

Topic
Biology

Link: https://ifory.id/abstract/nZCGH3FtjKkh

Corresponding Author
Hapsari Dewi

Institutions
Universitas Indonesia
Jalan Kampus UI, Kukusan, Beji, Kukusan, Beji, Kota Depok, Jawa Barat 16424
chairul.hudaya[at]gmail.com
hapsamarwa[at]gmail.com

Abstract
Induction motor slip ring-type technology has been widely used in industrial as one of crucial electrical components to convert energy mechanically. The construction of this motor is more complex than other standardized induction motors such as squirrel cage. The complexity lies on the connection between the rings and brushes which requires more maintenance. Meanwhile, Squirrel cage motor that is supported by a VSD system allows its user to start motor smoothly and adjusts the speed more efficiently. In this study, we exclusively investigate the possibility of the outdated technology replacement by using squirrel cage standardized induction motor based on its compatibility and the financial perspective as well. To prevent any coming up problems, the selections of new motor and VSD must fulfill the requirement of the existed system. Technical data were collected from customer-s SCADA and nameplates While the financial calculation was made based on payback period. In this case, the payback period is projected within two years that basically depends on operation patterns. According to our point of view, standardized squirrel cage motor potentially replaces the slip ring motor in which squirrel cage motor is not only for having simple operation but also less maintenance and energy cost.

Keywords
Induction Motor, Variable Speed Drive (VSD), Energy Saving, Payback Period

Topic
Electrical Engineering

Link: https://ifory.id/abstract/2u8VywNU9LjY

Corresponding Author
Baso Maruddani

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

b) DJA Institute
Apartemen The Green Pramuka City, Tower Fagio
Jl. Jendral Ahmad Yani Kav. 49, Rawasari, Cempaka Putih, Jakarta Pusat 10570, Indonesia

Abstract
This study aims to evaluate the performance of Satellite Nusantara Satu which has just been launched. Satelit Nusantara Satu is a broadband satellite that uses High Throughput Satellite (HTS) technology and uses Ku-band transponders to cover all regions in Indonesia. However, the use of Ku-band frequencies in Indonesia, which is located at a tropical region, must be evaluated because of the characteristics of the Ku-band frequency are very vulnerable to rain attenuation. In general, a broadband service requires link availability of 99.9% with a minimum speed of 100 Mbps. Our simulation results show that in the western part of Indonesia, to reach 100 Mbps with 99.9% link availability, the EIRP of the earth station VSAT is minimum at 79 dBW. In the central part of Indonesia, to reach speeds of 100 Mbps with 99.9% link availability, the EIRP of the earth station VSAT is minimum at 83 dBW. And in the eastern part of Indonesia, to reach speeds of 100 Mbps with 99.9% link availability, the EIRP of the earth station VSAT is minimum at 84 dBW.

Keywords
Satellite; Ku-band; Broadband; EIRP; VSAT

Topic
Electronics Engineering

Link: https://ifory.id/abstract/b3B8nmTqxFjC

Corresponding Author
Deden Winda Suwandi

Institutions
a) Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut, Indonesia
*deden[at]uniga.ac.id
b) Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Sumedang, Indonesia

Abstract
Azadirachta indica, A., Juss is a medicinal plant that is used traditionally for some disease, especially its leaves are used to treat a rheumatic diseases and lower blood uric acid levels. This study has been carried out to examine antihyperuricemia activity of ethanol extract, water fraction, ethyl acetat fraction and n-hexane fraction of the A. Indica leaves in male mice of Swiss-Webster strain. Extract and fraction doses used were 125, 250, and 500 mg/kg bw. The tests were conducted on mice suffering from hyperuricemia induced by potassium oxonat intraperitoneally and chicken liver juice orally. Measurement of blood uric acid levels were performed every hour for 4 hours after being given test preparations. The results showed that the ethanol extract and the fractions lowered blood uric acid levels. The n-hexane fractions at the three doses showed the highest activity. Then, the most active fraction, n-hexane fraction, was tested for its inhibitory activity on xanthine oxidase enzyme to determine its mechanism of action. The results showed that the n-hexane fraction inhibited uric acid biosynthesis by inhibiting the activity of xanthine oxidase enzyme with the IC50 value of 132 microgram/mL.

Keywords
A. indica leaves, Antihyperuricemia, Potassium oxonat, Xanthine oxidase

Topic
Pharmacology

Link: https://ifory.id/abstract/hLxW2BprPJZe

Corresponding Author
Asrianti yanti

Institutions
SMA N 1 MOWEWE KAB. KOLAK TIMUR PROV. SULAWESI TENGGARA

Abstract
Motivation and physical fitness of a teacher are the most important things in improving the performance of physical education teachers, even teachers who have been certified. A physical education teacher must have good fitness to improve his performance. The purpose of this study was to determine the effect of motivation and physical fitness on the performance of physical education teachers. This study uses the path analysis method (Path Analysis). Based on calculations, the influence coefficient of motivation on teacher performance is 0.194. t-count value of 2.124> t-table of 1.984. The effect of physical fitness on teacher performance is 0.376. t-count value of 4.913> t-table of 1.984. Effect of motivation on physical fitness, amounting to 0.298. t-count value of 3.349> t-table of 1.984. The results of the study concluded that certified teacher performance in dominant physical education subjects was directly influenced positively by motivation and physical fitness. But there are still other exogenous factors that directly or indirectly affect teacher performance. Therefore, the variables in this study must be used as a reference in an effort to improve the performance of high school teachers, especially in Southeast Sulawesi Province.

Keywords
Motivation and Physical Fitness

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/vg69M2zJ7jPe

Corresponding Author
Muhammad Iqbal

Institutions
Universitas Negeri Jakarta

Abstract
Abstract. Futsal at a glance similar to football. Likewise with variations when planning, when leading, shooting, and passing the ball. The choice is different between football and futsal which is located on a wide field between them. Broad futsal fields are much smaller than a soccer field. This research was carried out in the area of Kusuma Cijantung, East Jakarta, Jakarta. The research was conducted in March-April. The research in this study discusses the challenges with the explosive power of the members of the body and the target of the accuracy of the target to the ability to guide students in the fourth semester of futsal Kusuma Negara to get the data needed. The population in this study were STKIP Kusuma State Jakarta semester students with one hundred and twenty people. The part of this study is semester students of four thirty people in random. The results showed that in the first variable there was a relationship/significance of explosive limb muscle strength for futsal shooting skills. Translating both variables there is a relationship / strong determines the accuracy of the target. Variable shooting ability.

Keywords
power limbs, targeting accuracy, skills playing futsal

Topic
Sport Science and Technology

Link: https://ifory.id/abstract/26rRLKMEbDaC

Corresponding Author
Andri Ikhwana

Institutions
Department of Industrial Engineering, Sekolah Tinggi Teknologi Garut

Abstract
Local food products that have been known as icons of a region are faced with global market competition so that they are required to have competitiveness in fighting for the global market with the hope that business activities that rely on local identity are not lost and displaced by the arrival of various products that can replace product functions and roles on global competition. This study aims to identify the factors that support the sustainability of the local food product business so that it can compete in the global market and determine the strategies that must be done. To support this research activity, the method used is the analysis of factors supported by 100 respondents conducted using the accidental sampling method involving various groups of respondents. Based on the results of the study, it was found various factors that support the sustainability of local food product businesses, namely: lifestyle factors, individual factors, promotion factors and places, and product identity factors. Furthermore, so that the business activities of local food products can survive and be sustainable, the strategies that must be carried out are product innovation, intensive promotion, and determining a strategic sales location.

Keywords
local food products, global markets, factor analysis

Topic
Industry Engineering

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

Corresponding Author
Samuel Christian Hidajat

Institutions
a) Faculty of Engineering and Technology, Sampoerna University, Jakarta 12780, Indonesia
*farid.triawan[at]sampoernauniversity.ac.id

Abstract
3D printing is considered as a highly convenient manufacturing process since it enables to create objects of many shapes, sizes and rigidity based on the material properties and the printing parameters. However, the mechanical properties of 3D printed materials is not yet fully understood. There are a lot of different printing parameter combinations which results in different mechanical properties and printing time. This research work aims to investigate the relationship between printing parameters, i.e. infill density and infill pattern, and tensile property of Polylactic Acid (PLA) material. Anycubic i3 Mega 3D printer is used to print the specimens and an open-source slicing software Cura is used to vary the printing parameters. The two varied printing parameters are infill densities of 25%, 50%, 75% and infill patterns namely Grid, Tri-Hexagon, and Concentric. The specimen and tensile testing procedure are based on ASTM D638 Type 1 standard. Three tensile properties, in this case, elastic modulus, yield strength, and tensile strength were examined. The obtained results can be used as a data reference for making finite element model (FEM) as well as predicting the optimum tensile property with respect to the printing parameters.

Keywords
3D printing; tensile property; printing parameters; infill density; infill pattern

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/HdrM6XE8N3gV

Corresponding Author
Asep Deddy Supriatna

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

Abstract
Database design can be done using a relational approach. In this type of relational database, there is a clear description of the relationship between a table and another table that can do; this relationship described as a solid line that connects one field name to one table, with one name field in the other table. This situation will produce an integrated and accurate database design. Managing student data manually, for various information needs on different management lines both horizontally and vertically, will cause several problems. These problems are related to accuracy and response time. It is because each identified file is independent so that when a search for records or data is made difficult and the data accuracy not maintained because of data redundancy. Based on the conditions above, in this study, a database of student data management will be conducted using the relational approach. From the resulting menu system and the interface shown, concluded that the database design of student data management using the relational approach has been able to accommodate data and information needs relevant to business processes that occur within the student data management system.

Keywords
DATABASE; RELATIONAL;STUDENT DATA

Topic
Information Engineering

Link: https://ifory.id/abstract/6eVt2Uc8TEug

Corresponding Author
Asep Deddy Supriatna

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

Abstract
The success of the use of learning media depends on several factors, such as cognitive processes and student motivation. Therefore there are several principles of the feasibility of learning media to produce effective learning media, and these principles include: the learning process becomes fun, the learning process becomes more interactive and available feedback. The use of multimedia based learning media provides opportunities for educators to develop learning techniques to increase the effectiveness of the learning process. Likewise, for students, the use of multimedia is expected to be easier to determine what and how students can absorb information quickly and efficiently. Based on the description above, in this study, the development of learning media for early childhood education based on multi-media will be carried out using a multi-media system development method. From the results of the menu structure and interface design that produced, there is relevance between the learning material and the goals to be achieved from the learning process. So it can be concluded that the use of multimedia as a learning media can improve the effectiveness of learning objectives.

Keywords
CHILHOOD EDUCATION;LEARNING MEDIA;MULTIMEDIA

Topic
Information Engineering

Link: https://ifory.id/abstract/EW9ZFrmUyJua