bluuebunny/crossref_metadata_2025 huggingface dataset:
A Fish Biology Chaotic System and its Circuit Design
Authors: Rhif A , Vaidyanathan S , Sambas A , Mujiarto  , Subiyanto
Published: August 2019

Applications of dynamical systems in chaos theory arising in several areas are investigated and circuital implementations of dynamical systems are studied by many researchers. In this work, we consider the fish-biology dynamical system introduced by Foutayeni and Khaladi (2016). By taking a different set of parameter values, we observe chaos in the Foutayeni-Khaladi fish-biology model and derive a new fish-biology chaotic system. Properties of the new fish-biology chaotic system are analyzed by means of phase portraits, Lyapunov exponents, and Kaplan-Yorke dimension. An electronic circuit realization is shown to validate the chaotic behavior of the new 3-D fish-biology chaotic system. The circuit experimental results of the 3-D fish-biology chaotic system show agreement with numerical simulations.
Investigation of Fractional Diffusion Equation via QSGS iterations
Authors: Sunarto A , Sulaiman J.
Published: August 2019

We investigate the application of Quarter-Sweep Gauss-Seidel (QSGS) iterative method for solving (SFPDE’s) space-fractional partial diffusion equations with Dirichlet boundary condition. To do this, implicit finite difference scheme and Caputo’s derivative operator are used to discretize one-dimensional linear space-fractional equation to form system of linear equations. Then basic ideas formulation and application of the suggested iterative method are also introduced. Numerical examples of tested problems were carried out to demonstrate advantages of the proposed iterative method beside to the HSGS and FSGS as control method. Based on computational results, the QSGS method is shown to be the most superior than the HSGS and FSGS iterative methods.
Implementation Business System Planning for the Design of Tracer Study at Perjuangan University
Authors: Ruuhwan  , Aristi G
Published: August 2019

Information systems in business organizations are very important related to the timeliness and correctness of information needed by users. The first step to building an information system is planning. One methodology in planning information systems is the arrangement of strategic plans carried out using Business System Planning (BSP). This methodology is related to efforts to how information systems must be structured, integrated, and implemented by the organization for a long time. Perjuangan University is a university in Tasikmalaya. Even though Perjuangan University does not have graduates in the current year but for the future processing of graduate data is very important. Graduate have an important role in the development of an educational institution. Because graduate can act as ambassadors that reflect the quality of an educational institution in the public sphere. With the empowerment of good graduate, it can indirectly improve the good image of the alma mater towards the general public. Thus a plan is needed to build an information system tracer study which will be useful to manage graduate data and facilitate the search for graduate data. Steps taken with this methodology are business planning systems that define business goals, business processes, data classes, information architecture and integration. In this apper a prototype will be produced from the Perjuangan University tracer study information system.
Accuracy for Sentiment Analysis of Twitter Students on ELearning in Indonesia using Naive Bayes Algorithm Based on Particle Swarm Optimization
Authors: Kartiko Mohamad , Sfenrianto
Published: August 2019

Students can use social media such as Twitter for online learning (E-Learning). This study aims to analyse an accuracy for the sentiments of students about E-Learning who use Indonesian on Twitter social media both positive and negative opinions. The algorithms used are Naive Bayes (NB). Then to optimize the accuracy of the calculation results, the Particle Swarm Optimization (NB-PSO) approach is used. In order to optimize accurate results, this study uses three experimental sequences (scenario 1, scenario 2, and scenario 2) for both NB and NB-PSO algorithms. Each scenario uses different positive and negative comments. The results of the experiment show that in scenario 1 an increase in accuracy is 10.00% for NB-PSO. Scenario 2 there is an increase in accuracy of 13.33% on NB-PSO. Meanwhile, in scenario 3 an increase in accuracy is 27.22% for NB-PSO. These results prove that the accuracy of NB-PSO is better than NB for all scenarios.
Blood Bank Information System Based on Cloud Computing In Indonesia
Authors: Sahid Ramadhan Muhammad Nur , Amyus Arinda , Fajar Ahmad Nurul , Sfenrianto Sfenrianto , Kanz Abiyyu Fawwaz , Mufaqih Moh Sukron
Published: August 2019

In the health industry, the development of technology makes all of its related activities easier and faster. Cloud computing can facilitate controlled distribution of blood by using an information system. The problems that occurs in the distributions of blood at the hospitals in Indonesia are sometimes the distributions are not controlled, so the blood may run out of stock caused by inequality of blood needs, difficulty in finding blood donors, and don’t have an integrated system. The purpose of this study is to propose a connecting system that integrates Indonesian society who can be personal donor to help blood supply availability of UTD PMI using BBIS (Blood Bank Management System) based on cloud computing. The research methodology is collecting data with a systematic literature review and referring to previous studies, related to the current conditions in Indonesia. The result in this study is to propose Blood Bank Information System (BBIS), featured of application, dashboard, module and network architecture.
Prediction of Study Period Students (Bachelor Degree) Muhammadiyah University of Sidoarjo Based on Decision Tree Method using C4.5 Algorithm
Authors: Fitrani Arif Senja
Published: August 2019

The implementation of the study of stratum 1 (one) students is taken for 4 (four) years at the Muhammadiyah University of Sidoarjo. There are 10 faculty consisting of 27 departments with multi discipline and characteristic of study program of differentiate. Where in the study period is reached within the period of at least 4 years or 8 semesters. Students complete their study periods step by step. During the study period of 8 semesters, students’ time cannot run in a timely manner, so the graduation projections will be delayed and the study period will be more than 8 semesters. Many of the factors behind this condition both on the student’s initial ability, finance, and achievement of GPA in each semester. To know the factors that cause the condition of the student is not on time in taking the study period underlying various conditions, then conducted the study prediction period of study by using method C 4.5. It is expected that the condition underlying delayed graduation student of Muhammadiyah University of Sidoarjo can be anticipated through this research. With this, between providers of higher education can control each other over the condition of graduation students. The prediction achievement of study period using data mining decision tree method C 4.5 can produce approach or factors that influence student graduation with degree percentage to 85%.
Decision Support System to Choose Private Higher Education Based on Service Quality Model Criteria in Indonesia
Authors: Indrayani Rina , Pardiyono Ragil
Published: August 2019

Ministry of Research and Technology of Higher Education in 2017 centralized universities in Indonesia to establish a foundation for classification and ranking of universities in Indonesia in the context of continuous improvement and health of the organization. The clustering is based on criteria 1) Quality of Human Resources, 2) Quality of Management, 3) Quality of Student Activities, and 4) Quality of Research & Publication. The following are the results of the clustering. Cluster 1 is a university whose input, process and output are in a very good category, cluster 2 is in good category, cluster 3 is categorized quite well, cluster 4 is in a poor category, and cluster 5 is very poorly categorized, Input, for example, is lecturer quality, while process is, for example, institutional accreditation and accreditation of the study program and the last output is seen from the many students who received various awards (Kemenristekdikti, 2017). The College Clustering System is very influential on prospective students in making decisions to choose universities to continue their studies. According to [1] higher education is the service industry and service quality is an important determinant of the success of higher education. According to [2] the quality of service is one of the main goals of universities to attract students. Based on that, this study will create a support system for the selection of universities from the 5 clusters based on the dimensions of Service Quality (SerQual), namely 1) Reliability, 2) Responsiveness, 3) Assurance, 4) Empathy, 5) Tangibles. According to [3] decision support systems are popular tools that help make decisions in an organization. One method in the Multi-Criteria Decision Making (MCDM) is AHP (Analytic Hierarchy Process). According to [4] this AHP is quite effective in simplifying and accelerating the decision-making process by solving the problem in its parts. After a pairwise comparisonby decision makers for each criterion and alternative to obtaining the value of the level of importance of the element in the form of a qualitative opinion. Relative comparison values are then processed according to AHP steps to determine the relative rank of all alternatives. Based on the processing and analysis of data that has been done in the previous section, it can be concluded that universities in cluster 2 are selected based on the criteria of Reliability, Responsiveness, Assurance, Empathy, and Tangibles with a value of 0.261.
Application of Multimedia Animation Engineering Drawing (MMAED) for Vocational High School Students
Authors: Mujiarto  , Djohar A , Komaro M , Pratiwi AS , Muhammad T , Sayuti M
Published: August 2019

The use of animated multimedia in vocational schools in Indonesia is still not optimal, this is due to the lack of innovative teaching materials, especially multimedia-based instructional materials. This study aims to apply the results of the development of innovative teaching materials based on engineering animated image Multimedia for Vocational High Schools especially in the competence of Mechanical Engineering expertise. Meanwhile, the specific objectives to be achieved in this study are: (1) applying innovative teaching materials in the form of Multimedia Animation Engineering Drawing (MMAED) to improve vocational students’ competence. (2) Measuring the level of vocational students’ competence in engineering image material, especially orthogonal projection material. The method used in this application is using the Experimental method, namely by directly testing the product of Multimedia Animation Engineering Drawing (MMAED) to schools that have mechanical engineering competencies in Indonesia. From the application of Multimedia Animation Engineering Drawing (MMAED), students can increase their competencies in engineering material, especially orthogonal projection material.
Knowledge Sharing System to Improve Teacher Performances in SMA Negeri 1 Ciwaru
Authors: Wati Dyah Puteria , Zakaria Yoyo
Published: August 2019

This study is based on a view that today’s competitive high school institutions are able to exploit existing knowledge in every human resources to achieve excellences and competitiveness at the optimal level. Thus, this study aims to analyze the influence of knowledge sharing system that implemented in order to develop knowledge sharing culture among teachers to improve teacher performances in SMA Negeri 1 Ciwaru. The method that used in this study is the SECI model developed by Nonaka and combined to knowledge integration. While software quality testing techniques are tested by adapting the four characteristics of software quality of the ISO 9126 model of functionality, reliability, usability, and efficiency. The results of this studyshows the knowledge sharing system applied has excellent quality testing with 89.46%. So it could be the right solution to improve the performance of SMA Negeri 1 Ciwaru teachers to obtain tacit knowledge and explicit knowledge.
High School History Education and Education for Sustainable Development. An Integrated Curriculum Approach
Authors: Hendriawan D , Ali M , Rusman
Published: August 2019

This study aims to identify sustainable development related-competencies that can be adopted into senior high school history curriculum. The study used a survey method to 128 history teachers selected based on geographical location (69 teachers from the lowlands and 59 teachers from the highlands) and their teaching experience (a range of less than 10 years and more than 10 years). The data are collected using a questionnaire in the form of rating scale that had been examined related its validity, reliability, and each of its items’ discriminating power. The data were analyzed using descriptive statistics and ANOVA. The results show that the sustainable development related-competencies that are potentially integratable into the senior high school history curriculum are those related to socio-cultural dimension which consists of the competences to preserve the socio-cultural environment and to preserve socio-cultural diversity. The conclusion of this study is that competencies related to education for sustainable development have the potential to be integrated into the senior high school history curriculum.
Junior High School Geometry Visualization Activity
Authors: Prayito M , Suryadi Didi , Mulyana Endang
Published: August 2019

There is a series of learning that is rarely done by students to form comprehensive geometry knowledge. Visualization activities in this learning will help students through a series of geometry learning that matches the stages of geometry thinking. This activity has resulted in an increase in visual levels that are owned by students. Visual teaching aids and student activity guidance sheets are used in a series of learning. In this way students not only gain knowledge but do contextual visualization activities. This activity can be easily adapted for use on broader geometry topics.
The Influence of Student Team Achievement Division (STAD) Learning Model on Students’ Critical Thinking Ability in English Language Lesson
Authors: Jambari Obay , Ratnasari Dine Trio
Published: August 2019

This research is aimed to find out the influence of Student Team Achievement Division (STAD) learning model on students’ critical thinking ability in English Language lesson. This research is conducted in the 4th year (Grade IV) students in the elementary school of SDN Kaduagung Timur 1, Kecamatan (sub district of) Cibadak, Kabupaten (District of) Lebak, Province of Banten. The research uses the Experiment Pacto Experiment design. The study sample consists of 60 students. The results of the research show that: (1) as a whole, students’ critical thinking ability in English language lesson with STAD learning model is highly influenced. (2) There is an influence of interaction between STAD learning model on students’ critical thinking ability in english lesson. From the findings of the study, it is concluded that the STAD model has an influence on students’ critical thinking ability in English language lesson in the 4th year students in SDN Kaduagung Timur 1, Kecamatan Cibadak, Kabupaten Lebak, Province of Banten.
The Development Of Character Based Group Investigation Learning Models For Blind Students
Authors: Dalman  , Mardiana
Published: August 2019

This study aims to develop a character-based group investigation learning model for blind students. The development is prioritized on the content of the learning model by using Borg & Gall’s three stages of development namely, research and collecting information (literature review, relevant research), planning (model development planning), and developing products related to content. The research method used a qualitative case study method, with content validation based on expert validation. Character-based group investigative learning model is a modification of investigative group learning and character, developed specifically for blind students with advantages in other senses are expected to have a new spirit in learning. The development of the model related to content has several steps, namely: 1) Students are divided into small groups by expressing problems that exist in the community as a theme; 2) Each group with their respective problems; 3) Between groups giving advice on problems that happen or are discussed by other groups; 4) Suggestions from each theme were analyzed using the character indicators developed; 5) The conclusion of each discussion in each group is collected by the learning guide / teacher; 6) Drawing conclusions from each theme associated with the character indicators that appear in the learning. Expert validation regarding content from the five steps above which consists of: 1) Accuracy of steps; 2) Suitability of the theory; and 3) Language / word use. The results of the development character-based group investigation learning model have been validated by two Special School Education experts (PLB), and declared valid.
The Training Design for Vocational Teachers in Bengkulu
Authors: Marjon  , Zaid Nugroho Khathibul Umam
Published: August 2019

The research objective was to produce a valid, practical and effective training model to improve the performance of vocational teachers. This research is the development of a virtual online training model. We test the validity, practicality and effectiveness of the training model. Validity is determined by justifying three experts. The trainees were 50 Vocational High School teachers. Data collection was carried out by using validity sheet instruments, practicality sheets, and training participants’ performance tests. Data were analyzed using mean and percentage. The results of this study are that MD-DV is a valid, practical and effective training model to improve the performance of vocational teachers. We recommend that to improve employee performance, MD-DV training is needed.
The ability to Understanding of the Concept of Derivative Functions for Inter-Level Students During Ethnomathematics Learning
Authors: Widada Wahyu , Herawaty Dewi , Zaid Nugroho Khathibul Umam , Dwi Anggoro Abdurrobbil Falaq
Published: August 2019

The mathematical abilities can be measured through students’ mental and physical activities. One of them is using genetic decomposition analysis of APOS theory. The purpose of this study was to describe the ability to understand the concept of derivative functions for interlevel students during ethnomathematics learning. The research is part of our development research.The subjects were high school students majoring in mathematics and science in Bengkulu. The research was carried out in a participatory manner in the regular learning process by applying the ethnomathematics approach. Subjects were interviewed based on the assignments given. Data were analyzed qualitatively by applying genetic decomposition. To obtain inter-level characteristics, the description of genetic decomposition continued with fixed-comparison methods. The result was able students to encapsulate the process of function properties or intervals in the domain so that the object is formed about the sketch of the function graph h.
Integration of Sustainable Development Education Concerning Environment Conservation into Senior High School Islamic Education Curriculum
Authors: Komarudin  , Rusman  , Mohammad Ali
Published: August 2019

This study attempts to explore the needs for integratings ustainable development education into Senior High School (SHS) Islamic Education Curriculum which addresses questions on what types of the needed competencies better included in the SHS Islamic Education Curriculum The method used in this study is a survey method. The survey was conducted to explore the competencies needed for environment conservation by distributing a questionnaire in the form of rating scale that has been tested its validity, reliability, and each of its items’ discriminating power to 136 teachers of 27 districts’ and cities’ SHS in West Java, selected by using a multi-stages ampling technique. The obtained data were analyzed by using descriptive statistical methods of mean and standard deviation, followed by inferential statistical method of t-test. The conclusion indicates the perception of the West Java SHS teachers regarding the integration of ESD into Islamic Education curriculum, concerning the environment conservation dimension is very important and viable.
Validity and Reliability of the Problem-Based High School Teaching Materials of Physics using Android
Authors: Sriyono  , Istiqomah R M
Published: August 2019

The very rapid development of information and communication technology has such a broad influence including education. Educators as the main actors in formal education are required to be able to utilize the development of information and communication technology to support the learning process undertaken. The learning model with classical media applied by the teacher so far has not broadly developed a high level of thinking. This classical model results in the ability of students to evaluate whose capability to develop is unsatisfactory. Starting from this consideration, this research was conducted with the aim of knowing the validity and reliability of problem-based high school teaching materials of physics using Android and of improving the ability of students to evaluate such teaching materials. This development research was carried out by adopting the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) model. Data collection was done using validation sheets, observation sheets, questionnaires, and tests. The results showed that problem-based high school teaching materials of physics using Android were valid with a total average score of 3.44 and with the percentage agreement (PA) level of 89.52%. The teaching materials are also able to improve the ability of students in evaluating in the improvement category medium with an N-gain value of 0.359.
Developing Students’ Mathematical Justification Skill Through Experiential Learning
Authors: Supriani Yani , Fardillah Frena , rmudi Tu , Herman Tatang
Published: August 2019

Scientific skill is a special skill helping students to develop their knowledge. Indirectly, well-developed scientific skill will lead them to actively get involved. This special skill needs to be developed through cognitive skill. One of the developed cognitive skills is justification skill. Such skill is developed through experiential learning. This research involves 26 students in one of Junior High Schools in Serang. This research focuses on topics about line, angle, triangle, and rectangle. This research is quasi experimental research with One Group Pretest Posttest Design using Purposive Sampling technique. The result of analysis shows that students’ mathematical justification skill of Junior High School gives positive contribution through experiential learning.
Developing Higher Order Thinking Skills (Hots) For Reading Comprehension Enhancement
Authors: Thamrin Nani Ronsani , Widodo Pratomo , Margana
Published: August 2019

Higher order thinking skills (HOTS) play an important role in developing learning materials for reading comprehension. The major purpose of this paper is to know the problems rose in reading comprehension and to identify the development of higher order thinking skills for the students’ Kuningan University. This paper discussed the phenomenon of Reading comprehension enhancement through Higher Order Thinking Skill (HOTS) strategy in Kuningan University and describes how the HOTS strategy develop the students’ skills in comprehending the academic reading text. The data collected by using a classroom observation in mobile and interview between student and the result will be discussed in the class, were analyzed qualitatively by using categories formulated based on theories related HOTS stategy. As a result, the author obtains the strategy Higher order Thinking skills on reading comprehension seen from the C1-C6 phase of HOTS strategy. This indicates that the most of students have higher order thinking skills in comprehending the text.. The findings are expected to be references for English teachers in the implementation of teaching strategy.
Competencies of Education for Sustainable Development Related to Mathematics Education in Senior High School
Authors: Yuniarti Yuyun Sri , Hasan Rusman , Ali Mohammad
Published: August 2019

Education for Sustainable Development (ESD) is an idea which developed since 1992 as a concept of development that bases 3 pillars as its foundation: environment, social and economic. School is one of the educational media to be a strategic place to develop this concept. Teachers as someone who has an important role in learning must understand this concept. Therefore, this study aims to analyze teachers perceptions to education for sustainable development and analyzing the competencies in the dimensions of ESD that can be integrated into the curriculum of mathematics. The study was conducted using a survey method with questionnaires to 107 mathematics teachers of senior high school in the West Java and Banten grouped according to the geographical location. Data analysis was carried out through descriptive statistics and one way anova using SPSS. The results of the study provide two conclusions: first, the geographical location does not affect the teachers perception, second, almost all competencies in the dimensions of ESD can be integrated into the curriculum of mathematics.
A Novel 3-D Chaotic System with Line Equilibrium: Dynamical Analysis and Synchronization
Authors: Tlelo-Cuautle E , Sambas A , Vaidyanathan S , Zhang Sen , Mujiarto  , Subiyanto
Published: August 2019

A 3-D new chaotic system with three nonlinearities is proposed in this paper. We show that the new chaotic system consists of equilibrium points on the z-axis (line equilibrium) as well as two equilibrium points on the (x, y)-plane. Thus, the new chaotic system has hidden attractors. The dynamical properties of the new chaotic system are explored in terms of 2-D phase plots, bifurcation diagram, Lyapunov exponents, and offset-boosting control. Numerical results show that the proposed scheme has an excellent performance
The E-Commerce Implementation to Improve the Agricultural Product by using User Centered Design Method
Authors: Handayani Popon , Utami Sri , Septiani Wisti Dwi , Darwati Ida , Erawati Wati , Ramdani Panji Madya , Suparni Endang , Putra Octa Pratama , Sunge Aswan Supriyadi
Published: August 2019

Nowadays, information technology has altered the people’s life in many aspects. Simply stated, there are lots of benefits of buying things online. The people only use their gadget simply of choosing the product they need. Likewise, for the field of agriculture. The farmers at Sukatani, Indramayu, West Java, are able to market their products in digital. In this context, the role of e-commerce is the solution to be done of selling process. The objective of this research is to create e-commerce of selling the agricultural products of farmers. Therefore, it is needed the method of User Centered Design in e-commerce designing by utilizing the income of user and behavior as well.
Re-Layout of Product Placement in Retail Industry to Minimize Order Picking Time with Group Technology Method
Authors: Wahyudin C , Rahmawati S , Shafanah N
Published: August 2019

In retail industry, warehousing is the main activity. The warehouse can also function as a product distribution center (DC) to consumers or retailers. Distribution centers have an important role in supply chain management. DC performance is strongly influenced by many factors. One of them is picking order performance, which is a product taking operation from a certain storage place ordered by consumer. Total picking time is influenced by picker operator activity, which includes searching activity, traveling / transportation, taking, setting, and other activities/idle. The researched examined the possibility of redesigning the layout and structuring of products on the warehouse rack shelf so as to minimize picking time process. The method to be used in design is the group technology method. Based on the results in a retail industry in Bandung, the completion of the picking time is better by decreasing the average picking order completion time around 61.65% of the current system.
Enterprise Architecture Planning as New Generation Cooperatives Research Methods
Authors: Dwipriyoko Estiyan , Bin Bon Abdul Talib , Sukono F.
Published: August 2019

New Generation Cooperative is new kind cooperative. Preliminary literature and document exploration found only little information about New Generation Cooperative from information systems and technology perspective. This research will investigate New Generation Cooperative from information systems and technology perspective using Enterprise Architecture, and implementation based on Open Business Model. Research design used in this mix method research is Sequential Exploratory Design. This research uses several approaches to accomplish each step of deliverance. Initiation Layer of this research mostly uses Literature Exploration. Business Analysis Layer at Preliminary Analysis used Literature Exploration in Case Study, Business Analysis Layer at Enterprise Observation mostly used Observation and interview in Case Study. Enterprise Architecture Layer use mostly One-Shot Design Research. Implementation Product Layer use One-Shot Design Research. Outputs of this research are New Generation Cooperative Enterprise Architecture, New Generation Cooperative Enterprise Resource Planning Prototype, Open Business Strategic Management.
The Ideal Character of Students Based on Moral Values in Short Movie Videos
Authors: Arumsari C. , Hudha A N. , Isti’adah F. N.
Published: August 2019

In this millennium era, there are many students who are dependent on the internet, cell-phones, television and social media. It has a big influence on the formation of student characters because it affects lifestyle, ways of thinking, taking actions and understanding perspectives. The internet and social media have many positive and negative sides. It becomes dangerous when students are more attracted to the negative side and that destroy their characters. Positive character strength must be possessed by students as a provision to achieve the ideals and to become good human beings, so that they can be useful for the environment around. Positive character values can be seen in short movie videos that are associated with ideal characters that students must have. This study aimed at explaining the ideal character of students taken from the moral values of short movie videos. This study used a qualitative approach with library research type. The ideal character of students that could be formulated including (1) honesty; (2) tolerance; (3) discipline; (4) helpfulness; (5) caring for others; (6) responsibility; and (7) courage.
Integrated Point of Sales and Snack Vending Machine based on Internet of Things for Self Service Scale Micro Enterprises
Authors: Dijaya R , Suprayitno EA , Wicaksono A
Published: August 2019

Sales management is a key function which helps small and medium size enterprises (SMEs) in monitoring and tracking stock and co-ordinate transaction processing. Point of Sales developed to support sales management for scale micro enterprises. While self-service applications from banking, to travel, to foodservice, to ticketing, to hotels are booming, many have forgotten that the original self-service applications were in the vending industry. Selfservice has evolved into an operational mode that no longer should be viewed as merely a device-based channel for selling snacks and beverages. The aim of this research integrates point of sales and vending machine based on internet of Things (IoT) for self-service scale micro enterprise. Applications that record while sending data from multiple sensors. Data that records sensors sent through the IoT module to the server, then the server will save the data in a server database. Periodically new data will be visualized in the system through server application is a service. Real-time sales recapitulation system through a vending machine IoT for 24 hours. After being developed and implemented 24 hours machine will embedded by Internet of Thing (IoT) module. Through this all operational forms of the system are good in the form of stock, recapitulation of sales made by the vending machine and the latest conditions vending machines will be sent to the server so that users can monitor them at any time system. In addition to the profit-taking report, items can be recorded by the system. Owner outlets can remotely controlling vending machines via mobile phones because they are connected to server API (Application Package Interface) to the server application.
Optimization of Roundness, MRR and Surface Roughness on Turning Process using Taguchi-GRA
Authors: Mufarrih A. , Istiqlaliyah H. , Ilha M. M.
Published: August 2019

This research was conducted to optimize the turning process on several quality characteristics with the Taguchi-GRA method. Some of the quality characteristics that are optimized are roundness, material removal rate (MRR) and surface roughness. These three quality characteristics are then converted to a GRG value. The independent variables used in this study are the depth of cut (0.5; 0.75; 1 mm), feed rate (0.045; 0.065; 0.085 mm/rev) and cutting speed (37.68; 56.52; 75.36 m/min). The experimental design used is the L9 orthogonal array. The experimental results show that the turning process can be effectively improved through the Taguchi-GRA method. The optimal combination for obtaining maximum GRG values can be reached at a depth of cut of 1 mm, feed rate of 0.085 mm / rev and cutting speed of 75.36 m / min. The GRG value increased to 34% from 0.7017 to 0.9403.
Comparative Study on R-line and U-band Energies of Ruby Estimated from One-Electron and Many-Electron First-Principles Approaches
Authors: Novita Mega , Wibowo Setyoningsih , Nada Noora Qotrun , Ogasawara Kazuyoshi
Published: August 2019

We carried out a comparative study on R-line and U-band energies of α-Al2O3: Cr3+material, or the so-called ruby, estimated from one-electron and many-electron first-principles calculations. The estimations were performed without relating to any observed parameter. Although there are numerous reports on theab-initiocalculations of absorption spectra and multiplet energies of ruby based on many-electron approach, the investigation based on one-electron approach is basically impossible except for some particular states such as4T2 and2E. Here we compared the transition energies from the4A2 state (ground state) to4T2 state (U-band) and to2E (R-line) of ruby estimated by one-electron and many-electron first-principles approaches. The one-electron calculations were carried out utilizing using discrete variational Χα (DV-Χα) method combined with ligand field theory, while the many-electron calculations were carried out utilizing using the discrete variational multi-electron (DVME) method. The results show that generally both of the one-electron and the many-electron first-principles calculations can be utilized to estimate the multiplet energies such as U-band and R-line energies. Nevertheless, the refined formula to estimate the R-line energy based on one-electron approach is necessary to enhance the concurrence with the observed data.
Numerical Study of the Stagger Angle Effect of a Circular Cylinder Installed in Front of Returning Blade Toward the Vertical Axis Savonius Water Turbine Performance
Authors: Setiawan P A , Yuwono T , Widodo W A
Published: August 2019

This paper investigates numerically the effect of the circular cylinder’s stagger angle variation installed in front of the returning blade on the performance of Savonius vertical axis water turbine. The numerical simulation uses Computational Fluid Dynamics using ANSYS 17.0 to solve the incompressible Unsteady Reynolds Averaged Navier-Stokes (URANS). Firstly, numerical model is verified by varying the grid size at TSR 1,078. Then numerical results are validated by existing experimental data, in this case the torque coefficients. The working fluid is in verification using air at Reynolds of 4.32 x105 and convert to water fluid. Ratio of circular cylinder diameter to the turbine diameter (ds/D) is 0.5 at gap (S/D) of 0.95 with varying TSR of 0.3, 0.5, 0.7, 0.9, 1.1 and 1.3 and stagger angle (α) of 0, 30, 60 and 90 degree. The results show that the maximum power coefficient increases about 29.84% at a TSR of 0.9 for stagger angle of 60 degree.
Implementation Of Information Planning and Strategies Industrial Technology 4.0 to Improve Business Intelligence Performance on Official Site APTISI
Authors: Sudaryono  , Rahardja Untung , Harahap Eka Purnama
Published: August 2019

The Association of Indonesian Private Universities or often called APTISI, has a membership of 4189. Compared to State Universities that only have 372, of course the presence of PTS is definitely a solution amid the lack of equalization of higher education in Indonesia. However, with the existence of problems in improving the quality of education, APTISI as the Association of Indonesian Private Higher Education should be able to make PTS more competitive in all fields, especially the field of information and technology planning strategy (BSPIT) in the current disruption era. In this study, identified at least 3 (three) problems faced. An alternative solution to the problem is to apply the APTISI official site to show the performance of the association’s activities. 5 (five) literature reviews on Industrial Technology 4.0, Business Intelligence and Dashboard were conducted to determine the level of APTISI’s activities in the current disruption era. In designing the system, there are 3 (three) benefits found from a problem formula using the SWOT analysis method. From what has been explained above, the APTISI official site 4.0 industry technologies can disseminate information and improve the performance of APTISI members in the dissemination of information and activities by conducting a validity and reliability test for 100 (one hundred) respondents.
Use Of Inverter Off Grid 2000 Watt For Household With Battery Storage
Authors: Kusmantoro A , Novita M
Published: August 2019

Solar energy is an environmentally friendly energy and the source of energy is available continuously. In this paper, an electrical energy source for residential houses with 1500 watts of power is designed. In the design of this system, 80 AH battery storage and 2000 watt off-grid inverter are used. The off-grid system design in residential houses with 200 wp PV sources and battery storage systems can be used to meet residential electricity needs. In addition, the design of the off-grid system is very suitable for residential houses in areas not covered by the electricity network. In testing this off-grid system, the PV output current fluctuates against changes in the sun’s intensity. To overcome changes in PV output, the control of the battery can quickly regulate the power flow to the load. The charge process and battery discharge are controlled with a voltage sensor. The test results of the off-grid model show that the voltage at the load is always stable, which is 220.8 V. The use of renewable energy in the country of Indonesia is currently being carried out and continues to experience improvement along with the increase in population. Renewable energy sources that are widely available in Indonesia are solar energy, wind energy, and energy from waste waste. Especially for solar energy in Indonesia is widely used as a renewable energy source. This solar energy source can be obtained easily, because Indonesia is a tropical country. Solar energy is an environmentally friendly energy and the source of energy is available continuously. In this paper, an electrical energy source for residential houses with 1500 watts of power is designed. In the design of this system, 80 AH battery storage and 2000 watt off-grid inverter are used. The off-grid system design in residential houses with 200 Wp PV sources and battery storage systems can be used to meet residential electricity needs. In addition, the design of the off-grid system is very suitable for residential houses in areas not covered by the electricity network. In testing this off-grid system, the PV output current fluctuates against changes in the sun’s intensity. To overcome changes in PV output, the control of the battery can quickly regulate the power flow to the load. The charge process and battery discharge are controlled with a voltage sensor. The test results of the off-grid model show that the voltage at the load is always stable, which is 220.8 V.
Mine Surveying Technologies in Indonesia
Authors: Ramadhon S , Wahyudin D , Ali M
Published: August 2019

The development of mine surveying technology has made major changes in mine surveying work. However, the use of mine surveying technology in developing countries is still underdeveloped. Therefore, this study aims to identify various mine surveying technologies in Indonesia based on mine surveyor perceptions and to analyse the influence of education background on the mine surveyor’ perceptions about mine surveying technologies. The study was conducted using a survey on 155 mine surveyors based on their education level. The survey was conducted using a questionnaire that has been tested for validity and reliability. Data analysis was performed using descriptive statistics and ANOVA. This study shows that there are still mine surveying technologies that are not commonly used in Indonesia, and there are significant differences in perceptions of the mine surveying technology, especially for mine surveyors graduating from senior secondary school with those graduating from diploma and undergraduate degrees.
Determination on Improving Company Performance through Discipline, Training, and Compensation
Authors: Sonjaya S , Muttaqijn M I , Susilo P , Nasution A
Published: August 2019

This paper tries to explain and analyze the influence of discipline, training, and compensation on employee performance. In this study, the phenomenon was portray through the problems that occurred in the Pardic Jaya Chemicals Company, which experienced a decline in sales due to a reduction in production levels caused by the performance of its employees. This study uses quantitative methods by making employees as samples to measure the influence of independent variables (discipline, training, and compensation) on the dependent variable (performance). The results of this study found discipline, training, and compensation have an effect on performance, it’s just that the effect of compensation on performance is very small and means an increase in compensation does not necessarily directly impact performance.
An Overview of Potential Drug Interactions in Patients with Cesarean Section at RSUD Dr. Soekardjo Tasikmalaya
Authors: Rahayuningsih Nur , Nurfatwa Maritsa , Idacahyati Keni
Published: August 2019

Drug interaction is when a drug competes with one another, or which occurs when one drug is present along with another drug so that the effectiveness or toxicity of the drugs are affected or changed. The study was conducted observationally, using descriptive method. Data was obtained from a retrospective research of medical records in the period from July to December 2017 at RSUD dr. Soekardjo Tasikmalaya. Data were analyzed using drug interaction checkers such as Stockley’s Drug Interaction Edition, Drugs Interaction Facts by Tatro in 2009, and Pocket Guide to Evaluations of Drug Interactions. The number of research subjects who met the inclusion criteria were 115 people. Data were analyzed using SPSS chi-square method. 100% potential drug interactions occur based on severity analysis.
Physiological response of premature infants due to the administration of pseudostem banana nest innovation to the incubator
Authors: Hapsari W , Widyawati M N , Suryono S
Published: August 2019

In this study, innovation of banana pseudostem nest was conducted to assess the physiological response of premature infants due to the provision of pseudostem banana nest innovation in the incubator. This innovation is needed because premature babies need conditions that promote physiological response functions to increase body temperature, gain weight and assess changes in oxygen saturation. Unfortunately, so far there is no temperature stabilizer in the incubator, the incubator is made of electric and heating elements only so that some physical parameters cannot be accommodated with the incubator. Therefore, this paper proposes the innovation of pseudostem banana nest because it has a 400% water absorption level, a higher temperature stabilization on the fibers in commonly used materials. This study measures physiological responses. The research procedure begins with the manufacture of dried banana pseudostem ingredients, making pseudostem banana nest from banana midribs and coated with a cloth shaped like a hand containment. This research uses a quasi-experimental design method with pre-post test control group design. The sampling technique used was nonprobability sampling by consecutive sampling. A sample of 30 preterm infants was divided into 15 control group samples, 15 intervention group samples. Action procedure, the researcher treated the intervention group by placing nest pseudostem banana in the incubator until it surrounded the premature baby for three consecutive days. Measurements were made on parameters of body temperature, weight, oxygen saturation before and after intervention in the control group and intervention group for three consecutive days. The results of this study were obtained significant differences in body temperature, oxygen saturation before and after given nest pseudostem banana with a p-value of 0.001; 0.003. In this study, there were no significant differences in body weight before and after being given nest pseudostem banana with a p-value of 0.837.
Monitoring of Uterus Electrical Activities using Electromyography in Stage I Induction Labor
Authors: Rhomadona Shinta Wurdiana , Widyawati Melyana Nurul , Suryono S
Published: August 2019

Labor induction is one of the main contributors of serious complication among mothers and babies. Prolonged artificial uterus muscle contraction may result in uterus hyper stimulation. One method of prevention is using the abdomen palpation technique. However, its practice has so far been less effective, less accurate, time consuming, and somehow subjective, as it requires meticulousness of the examiner. The WHO recommends that laboring mothers using induction technique should continuously be monitored. Therefore, there is a need for a much more accurate measure using a monitoring instrument that is capable of recording contraction. The instrument is electromyography. This research analyzed uterus electrical activities in stage I labor induction. The method used was observing 10 respondents undergoing labor induction for their contraction, every 15 minutes for 10 minutes each using electromyography. Monitoring results were then analyzed for frequency, duration, interval, and action potential, and these were presented as a trend. Results show a trend of frequency, duration, interval, and action potential of uterus contraction in stage I labor, with successful induction showing increasing rhythm, while failed induction indicating constant rhythm. Mean frequency, duration, interval, and action potential is 5.30 time/10 minutes, 55.89 seconds, 4.12 minutes, and 1.64 V respectively. Meanwhile, the 3 mothers with failed induction have mean frequency of 1.64x/10 minute, mean contraction duration of 21.74 seconds, and mean interval of 7.40 minutes, and mean action potential of 1.18 V.