bluuebunny/crossref_metadata_2025 huggingface dataset:
Forecasting Hotel Expenses using The Arima Method
Authors: Syahromi T , Sumitra I D
Published: November 2019

The purpose of the research is for the purpose of the paper to forecast expenses in hotels forecasting costs incurred in hotels using the ARIMA method that is the data used is the cost of expenditure data from January 2014 to January 2019. in addition to the data obtained by using a descriptive method that is documentation with collect data and in the literature. This method was chosen because of the suitability of the amount and pattern of existing data. Based on the results of research using the ARIMA method is suitable for forecasting data that has trends. That means using the ARIMA method will bring good data to broadcasts that can make good analysis for the company. in addition, the results of the study indicate that using the ARIMA method (1,1,1) an estimated result is obtained from 788450868.46 - 758272912.67 in January 2019 and has a MAPE of 6,616718.
Development of Independent Learning System Arabic Letters For Blind People
Authors: Syahrul  , Wicaksono M F , Kurniawan R H I
Published: November 2019

The purpose of this study describes the design of the instrument which aims to help blind people learn hijaiyah letters. For blind people, of course there will be difficulties in learning hijaiyah letters. The research method used was the process of making tools in designing a system block diagram consisting of three main parts, namely the design of input modules, the controller / processor design, and the output design. Based on the results of the study found that an independent system that can teach hijaiyah letters to the blind, this instrument can be used independently by the blind because it provides a special braille button to represent hijaiyah letters. There are two modes provided in this learning tool, namely tutorial mode and practice mode. For tutorial mode, if a blind person presses the braille button on one of the hijaiyah letters, the letter will come out. As for the practice mode, if a blind person reads hijaiyah letters, the tool will provide a voice response to the user whether the pronunciation of the letters is correct or wrong in pronunciation. With this instrument, it is expected to help make it easier for blind people to learn hijaiyah letters.
Measuring the Level of Plagiarism of Thesis using Vector Space Model and Cosine Similarity Methods
Authors: Indriyanto I , Sumitra I D
Published: November 2019

The purpose of this research is a computer system can assist in detecting and measuring plagiarism of scientific work quickly. There are many techniques that can be used to measure the level of plagiarism of a document. in paper, we will use the Vector Space Model and the research method used namely Cosine Similarity to measure the level of similarity of the thesis. The result of this method was comparing the level of thesis similarity with the dataset using the TF and TF-IDF techniques in graphical form. It can be concluded from the experimental process, using the TF-IDF technique produces a smaller value compared to using the TF technique.
Usage of IT on Traditional Magic Practice: Review on Cultural Transformation
Authors: Kasmana K
Published: November 2019

The purpose of this study is to determine the extent of the use of blog features in the practice of santet in Indonesia. The method of this research used an analysis of compositional interpretation, 3 selected blogs mapped the content. Through research, it is known that internet sites are the initial medium of transactions. Practitioners (shamans) make the internet a medium for trapping consumers (as an actors), especially middle, upper-middle and upper-middle class economies who are busy, reluctant to identify their identities, and need fast processing. In the site presented the types of witchcraft services with various levels, most of the sites straightforwardly load shamans contact numbers. The utilization of blog features is quite optimal, the collaboration between shamans and site admins is quite intense, proven through content so that complete information is available to service users who are filled with a high desire for revenge. Internet technology benefits both parties, both perpetrators of witchcraft (shamans) and service users, for actors of course the economic impact, while for service users are aspects of convenience and information.
Improvement of Model Automatic Tracker Strength Signal Antenna Based On Azimuth and Elevation Control Approach
Authors: Herdiana B , Gunawan D
Published: November 2019

The model of tracking the automatic signal strength of the system through the receiver antenna is one way to minimize the attenuation of the receiving signal through automatic antenna movement techniques based on information data input the value of the azimuth and elevation angle between the satellite and receiving antenna. The purpose of this research is to ensure the existence of satellite orbit trajectories, and the signal strength emitted will always be stable in each orbit position. While the method used in this research is field observation and design system with position of satellites as target objects tracking of the signal strength to designed device which located as a receiving antenna and tracker device. Analysis and measurements results showed that all satellite targets tracked resulting in a minimum to maximum angle of azimuth and elevation have percentage errors 0.52% - 4,02% and 0.25% - 3,99% when detecting NSS6 while when detecting Palapa D the value minimum to maximum percentage errors were 0,6% and 4.67% with a tolerance of directing angle to satellite < 2° according ITU-R recommendations. The conclusion is that satellite objects can be tracked the position of the orbit by looking the level of strong consistence of the received signal quite well based on the results of small angle error detection.
Evaluation of usability online payment website to agent satisfaction
Authors: Sari D P , Pangaribuan I
Published: November 2019

Website could use as a media to provider and agent to do business in transportation ticket sales such as airlines, hotel, train and bus, sell pulse and other payment also. Agent act as seller selling products to customer. There are many existing online payment website, to compete with other existing website, need to satisfy agent. Satisfaction could be reach with website quality. The purpose of this research is to measure the quality of the website and agent satisfaction. This study used webqual 4.0 as method, the author took 30 sample from registered agent. The research result is calculation t-statistic on usability value is -0.56. The value is smaller than the t-tabel at a significant level of 95%, so it is rejected, means variable usability is do not have a significant influence on customer satisfaction online payment website. Impact of this study is to know usability of the payment website to improve agent satisfaction.
Implementation of Web Assembly Technology as Visual Learning Media to help High School Students in Human Body System Learning
Authors: Agustia R D , Wulan D R
Published: November 2019

The aim of this paper is development of application learning system for the human body system using Web Assembly technology to help high school students to recognize system organs of the human body including general functions and diseases in visual learning. Development of system using APPED model which consist of five stages development. The First stage is analysis and preliminary research to analyse the system needs and characteristic, second stage is design system to describe the system architecture, flowchart, Screen Design and Storyboard. Third stage is Production to develop the system using authoring tool, fourth stage is Evaluation to test functionality of system using blackbox testing and test reaction to students using summative evaluation to measure the level of satisfaction program usage. Last stage is dissemination to publish applications in general through social media or the internet. The media visual learning system built based on for web applications because it can be used by students anywhere and anytime. The Experimental result it show that applications based on the total score obtained from the questionnaire to 35 respondents obtained a total score of 674 which are based on the attitude categories it show positive attitude the application can help high school students understand the material systems of the human body, with material that has 3D objects, and can recognize the organs of the human body system along with their general functions and diseases and by giving 3D objects as a teaching aid.
Mobile Payment As Financial Transactions In The Digital Era: An Empirical Analysis
Authors: Marginingsih R , Widiyanti W , Susilowati I H , Retnowulan J , Soraya I
Published: November 2019

The utilization of the development of the digital economy today has changed people’s behaviour in almost all aspects of life. The use of technology such as mobile payment or often referred to as m-payment provides convenience in financial transactions. This study aims to determine the factors that influence the application of mobile payment systems by consumers. 230 respondents were surveyed online using the convenience sampling method. This study used a descriptive study using a quantitative approach. A research model was developed and proposed relationships were tested using Structural Equation Modelling (SEM). The results of the study were obtained by the factors of perceived usefulness payment, perceived ease of use, attitude toward using had a significant effect on intention to use in mobile payment based on the Chi-Squares, Probability, Chi-Squares Minimum (CMIN)/Degree of Freedom (DF), Goodness of Fit Index (GFI), Adjusted Goodness of Fit (AGFI), Comparative Fit Index (CFI), Tucker Lewis Index (TLI) and Root Mean Square Error Aproximation (RMSEA) results that are in accordance with the reference value of the structural equation modeling (Goodness of fit model). This shows that the use of mobile payments in all sectors is in great demand by all levels of society.
Information Technology Advertisement for Online Shop
Authors: Effendi D , Januar A R R
Published: November 2019

This study aims to further optimizing online shop businesses by using Qualitative method in the research which resulted in more in-depth understanding in online business. With the rapid development of technology today, most young entrepreneurs online shop businesses are still using web media and not many people know. To expand an article and increase consumers, the online shop young entrepreneurs are looking for ABC social media applications. Where the target is a celebrity, because the program is more widely known to the youth to look for items to be searched for and which are discussed, liked or even used by most people at that time. Instagram is an application that includes a lot of interest with its users. A few people who have a lot of followers or followers are called celebgram. From these services they benefit by promoting an online shop so as to facilitate the online shop to get consumers, and can make it easier for consumers to find an item they want to look for. By just having a contact person and holding an Instagram account, everything can certainly make the celebrities find it difficult to handle it, plus the number of online shops who want to work together. Therefore, young entrepreneurs expand a product article as a business opportunity with media endorse which aims to facilitate entrepreneurs promoting online shop business to celebrities who want to use their services.
Vending Machine Business as a Solution to Feminine Hygiene Products Necessary
Authors: Yunita A S , Pangaribuan I
Published: November 2019

The purpose of this research is to see benefits vending machine in supply necessary of society, especially in an emergency. The method used in this research submitted a questionnaire to 42 female respondents. The result of this research was besides being able to be used as an effort to make a big profit; vending machine business can be a solution to necessary of society with a high level of urgency. Because, a business that is supported by technology can accelerate the distribution of a product to consumers, so the necessary can be fulfilled quickly, easily and practically. Impact of this research is to show that the vending machine helps the customer to get a product easier. The businessman can see the vending machine as an alternative way to get profit. Conclusion of this research is good businessman not only has to be good at finding business opportunities with nice prospects but must be able to be a solution to the necessity of society, including urgent necessary.
How to Use E-Commerce in Life by Using Benefit and Impact
Authors: Wiganepdo S , Azizah R
Published: November 2019

The purpose of this research is to identify the development of e-commerce technology in business world and the benefits of the of e-commerce application in online business. The method used in this research is descriptive method, it is a method that present a complete overview of the situation related to the examined variable situations. The result of this research is identifying how far the development of e-commerce technology in the world of online business, as well as the benefits provided by the application of e-commerce in the world of online business. This research discusses about the transaction’s system, sales, reservations, and all daily activities which e-commerce technology can be used.
Development of New Media in Marketing Field
Authors: Darmayadi A , Rizkiawan A J
Published: November 2019

Social media is currently almost owned by everyone. This study aimed to discuss the development of new media in the marketing field. The method of this study used qualitative methods. The media has advantages in terms of exchanging information without knowing distance and time. Even social media is used by many institutions to market goods and services to the public. So that the public can get to know the marketed products. The result of this study is the development of social media which is very helpful for entrepreneurs in terms of promotion because in terms of cost is low and effective in marketing.
Target Marketing Strategies Using Computer Based analysis in Profiling Potential School
Authors: Purfini A P , Yunanto R
Published: November 2019

The purpose of this research is to obtain information about schools that have good prospects for becoming university marketing targets. So schools can work directly with universities that target them. University can directly target high-achieving students from schools that have good reputations too. This study used data mining clustering methods to analyze the data of prospective new students and the data of graduating students. Data input for the data mining process used segmentation that considers retention, frequency, and average grade point average (GPA), this was needed to determine school characteristics. The results of this study are school profiles to identify a list of potential schools that will be targeted by university marketing.
Enterprise Architecture for Higher Education Using Enterprise Architecture Planning Based Three Pillars of Higher Education
Authors: Indrawan B , Sumitra I D
Published: November 2019

This study aims to design and adapt IT infrastructure based on Enterprise Architecture Planning (EAP) at UNIKOM. The method used in this study was the Enterprise Architecture Planning (EAP) method; the EAP methodology serves as the basis for many modern EA methodologies. The results of this study can produce a blueprint that can align IT infrastructure and business processes by the Three Pillars of Higher Education. However, to improve the success factors of implementing EAP-Based Higher Education, full support from all levels of stakeholders is needed. Where technical and non-technical factors will influence the successful implementation of EAP. The goal is to design and adjust IT infrastructure based on Enterprise Architecture Planning (EAP) at UNIKOM. The framework in EAP consists of 4 stages, but only three stages are used namely Initiation Planning, Business Models, Current Systems and Technology, Data Architecture, Applications, and Technology. The conclusion from this study as applying EAP based on the Three Pillars of Higher Education can obtain a number of benefits such as better decision making and future business and IT alignment.
The Adoption of Online Internet Banking in Islamic Banking Industry
Authors: Johar R S , Suhartanto D
Published: November 2019

This research is conducted to investigate the factors impact Islamic bank’s consumers in adopting online internet banking. To test the hypotheses developed, this study uses the extended theory of The Unified Theory of Acceptance and Use of Technology (UTAUT) consisting of expected performance, effort expectations, social influences, facility conditions, and religious factors. This study utilizes 250 Islamic banking customers as the sample, gathered from Bandung and Jakarta. Using Partial Least Square Modelling as the data analysis method, the results reveals that the expected performance and religious factor are the most important determinants for Islamic banking customers to adopt online services. This research extends the existing knowledge of internet banking adoption in the context of Islamic banking. From a practical perspective, this study provides a guidance and strategy for Islamic bank managers to encourage their customers to adopt online internet banking services.
Marketing Strategy Through Social Media
Authors: Soegoto E S , Utomo A T
Published: November 2019

Social media networks or new media are one of the most widely used communication media by all people or the wider community today. The purpose of this study is to analyse marketing communication through social media. This research used descriptive method, to present a complete picture of the situation related to several situations of variables examined. The results revealed that marketing communication using social media has an effect on consumer interest in buying goods offered through social media such as marketing conducted by Instagram social media most frequently visited by people today. This study discusses the marketing strategies that are involved in social media instagram. These results make social media one of the suitable media to deliver a marketing communication. So that this marketing technique is expected to help online sellers in managing their business. This marketing technique has more real time advantages in serving customers to invite more customers to develop online businesses that have been built.
Building a Business Using E-commerce Technology
Authors: Fibriyanti W , Kurniasih D
Published: November 2019

The purpose of this study is to identify business systems using e-commerce technology and make the attractiveness of a company in selling its products that are packaged into online marketing. The method used in this research is descriptive method using a qualitative approach. Data collection techniques are carried out through observation, interviews, and documentation. The results of this study are that the use of e commerce-based systems will increase the buyers’ interest to view the contents of business products. At the end of this study, it was concluded that e-commerce systems make it easier for business people to conduct business in terms of shipping information, payment products, and systems, thus the conclusion is that e commerce makes significant attraction for consumers to buy online.
Big Data Impact in Development E-Commerce
Authors: Sutisnawati Y , Maulani W K
Published: November 2019

The purpose of this research is to enable a business to have access to an amount of larger data, and some of that information comes from an e-commerce business. The literature review method was used to describe how big data Analytics can affect to an e-commerce business. Big Data is a good asset for sales and marketing because there is valuable information from tons of data. The result from this research is that Big Data improved shopping experiences, customer satisfaction, and increase sales. The conclusion of this study is that Big Data Analysis in E-commerce can help improve customer experience and help make the right decisions in business.
Electronic payment for Micro, Small and Medium Enterprises in Developing Countries
Authors: Puspitawati L , Gurning P
Published: November 2019

The purpose of this study is to find out how to use electronic payment for small and medium businesses. Because the rapid development of technology in developing country has resulted in middle to lower consumers experiencing technological ignorance. This research will answer question; what is the meaning of electronic payment for small and medium enterprises. The research method used interpretive qualitative methods with a descriptive approach. The results show that electronic payment can benefit small and medium businesses by bringing in many visitors by giving discounts, free ads, bonuses and more. The weakness of electronic payment is that electronic payment can make it difficult for visitors to purchase goods because electronic payment has complicated rules, as they have to top-up their account balance first before buying something and only one type of electronic payment in certain counters. The conclusion of this study is the use of e-money for small and medium businesses diverted into marketing reasons.
Marketing Strategy Sales of Goods and Services Using Information Technology
Authors: Fadhilah M F , Praja S I
Published: November 2019

The purpose of this research is to explain how the marketing strategy carried out by the workshop to sell goods and services through social media as the main tool of promotion. This research method used descriptive methods describing the marketing strategy for selling goods and services through social media. The results of this study are product marketing through social media is considered more effective and efficient with minimal capital because at times like this social media is important in the lives of consumptive Indonesians. Product marketing through social media can make it easier for owners to market their products.
E-Commerce Risk During Transaction Process
Authors: Sahara S , Kurniati P S
Published: November 2019

The purpose of this paper is to analyze and provide information about one of the factors that influence e-commerce, namely security factors. The method used in this study was a descriptive approach by collecting information from books, journals, and the internet. The results of the study show that the safety factors that generate buyer trust are very important in e-commerce because e-commerce is a place to buy and sell without looking directly at the form of buyers and sellers. By simply open your cell phone, you can buy what you want. Therefore, the seller needs to provide a sense of security to the buyer so that the buyer can give his trust to the seller.
Agricultural land use change into tourism area in Lembang Sub-district, West Bandung Regency, West Java Province, Indonesia
Authors: Warlina L , Guntara R
Published: November 2019

The research objective is to identify agricultural land use change and its impact on the community in Lembang Sub-district, West Bandung Regency. The research methods used were overlay technique and questionnaire distribution. Overlay technique was used to determine the location distribution of land use change. Land use maps of the year 2008 and 2015 were used for overlay analysis with geographic information system (GIS). Questionnaires were distributed to the residents of Lembang Sub District to gather information regarding changes in occupation and income of the community. The result of the overlay technique is agricultural land about 116.1 hectares converted into other functions. Modifications of these land into buildings by 2%, housing as much as 77%, a commercial zone covering an area of 8% and tourism area 13%. There was evidence that the majority of farmers have monthly income decrease more than 25% as an impact of land use change in this area. There was no evidence that the resident’s occupation changes due to land use change in this area.
Solar House System Adoption among Rural Community
Authors: Nabilah S L , Loveldy Z A C , Prayoga S S , Suhartanto D
Published: November 2019

West Bandung Regency experiences inequality in access to electricity due to difficulties in the distribution process. One possible solution to overcome this problem is to utilize solar energy. Therefore, the purpose of this research is to determine importance of Solar House to be done with the intention of identifying the factors that influence the adoption of SHS technology among the public. This study used a modified TAM model consisting of perceived usefulness, perceived ease of use, social factors, and resource factors. The method of data collection is through the distribution of questionnaires to 185 respondents in rural areas of West Bandung Regency. Furthermore, Partial Least Square Modeling is used as an analytical method to test hypotheses. The results reveal that social factors are the most important determinant for the adoption of SHS. From a theoretical perspective, this study broadens our understanding of the adoption of SHS technology customers in rural areas. Furthermore, from managerial applications, this research suggests a social marketing strategy that can be carried out by solar panel entrepreneurs and the government to encourage rural communities to adopt SHS technology by expanding their existing knowledge.
The Relationships between the Characteristics of Pedestrian and the Increase of Facilitation of Sidewalk
Authors: Natalia T W , Rohmawati T
Published: November 2019

This research aims to know the characteristics of the pedestrians along the Braga route and to see the relationship between the characteristics of the pedestrians with the hope of increasing the pedestrians along the Braga Street in Bandung. Data was collected by means of data and analysis by method of analysis of distribution and cluster analysis. The results of this research show that the main facilities expected to be improved for the pedestrians along Braga Street are the availability of park area. It is Happen because Braga Street does not have a special area for parking, the parking area or even the parking area.
The Form of High-Performance Computing: A Survey
Authors: Assiroj Priati , Warnars H L H S , Kosala R , Ranti B , Supangat S , Kistijantoro A I , Abdurrachman E
Published: November 2019

Computational technology is an important thing that needed in the whole of human life. Along with the development of computer technology, there are a significant data created and wait to be processed; we will get more advantages if it well-processed, if not we will see the data explosion, the data is just a useless stack. Research mitigates the other research paper and makes a conclusion and a report by PRISMA method. The development of computer technology will support the development of an organization. Considering any factors in choosing the right and suitable high-performance computer resource due to our organization is a must. The existing high-performance computing forms are Supercomputer, Grid Computing, Cluster Computing, and Cloud Computing. Based on this work, the last form of high-performance computing, Cloud Computing is one of the most used forms thus we mitigate its advantages and disadvantages. Recently, to process this vast data, we must have a high-performance computer and to provide it, this is not a cheap resource.
Scale Invariant Feature Transform Descriptor Robustness Analysis to Brightness Changes of Robowaiter Vision Sensor System
Authors: Nizar T N , Supatmi S , Putro E P
Published: November 2019

The purpose of this research is to identify problem detection features in computer vision that are affected by changes in brightness. The presented descriptor is Scale Invariant Feature Transform (SIFT). The method used in this study is an algorithm in computer vision to detect and describe local feature in image which robustly identify object and invariant to uniform scaling, orientation, brightness changes, and partially invariant to affine distortion. We implement this algorithm to Robowaiters object detection system that must detect and recognize objects around its task like food, beverage, refrigerator, and any kitchen objects. For this analysis case, we use beverage box image for sample image. The algorithm detects and recognize the image in normal brightness, and then the image brightness value increased and decreased. The result is that the algorithm successfully detects and recognizes the object presented and distinguishes it with a success rate of 93.5% increase in image brightness and 95.5% decrease in image brightness. it can be concluded that the SIFT algorithm is robust enough to change the lighting for our case.
Multi Sensors Application for Automatic Portal Access in Residential Complexes
Authors: Sutono S , Ginting S L BR , Wicaksono M F , Tembo K R
Published: November 2019

The purpose of this study is to implement multiple sensors for automatic portal access. More and more people who live in housing complexes, especially middle and upper economic circles, are increasingly vulnerable to security systems in housing complexes. This is because the guard officer may not be on guard for 24 hours without stopping. For this reason, an automatic portal system is needed to overcome the security system in the housing complex, so that people living in the housing complex feel comfortable because they are protected from crimes that can occur in the housing complex. The method of this research is field analysis which goes directly to the field to see the current conditions and housing shortages. The results and research are expected to help realize smart housing that has used RFID in its security system. And the expected impact of this research is to be able to realize smart housing that can read information from a small device called a TAG or Transponder (Transmitter and Responder).
Measuring Detection of Signature On Enterprise Computer Network
Authors: Alviana S , Sumitra I D
Published: November 2019

The purpose of this study is to measure the comparative success rate methods of signature-based anomaly based on enterprise computer network attack detected. The application of information technology in many fields often cause the occurrence of attacks and threats that lead to data loss, the crippled system, and destruction of the system. To address these threats required the presence of early detection against any threats that occur at the enterprise computer network system. Early detection function to minimize and prevent the loss of the more extensive system. Methods used in the detection of the threat that is signature based and anomaly-based method. Both methods are used for detection of any threats to the network system, then that method will be between the two measured how many threats can be detected by both methods, and measure the level of success detection. The results obtained in this study, Method of Anomaly Based successfully detect 89.66% attack, while the method Signature based successfully detected 91.87% attack. If the results of the great early attack detection, then the security level of the network are also great and can reduce the risk posed by a threat.
Computerized of International Financial Report Standard For Good Governance in Small Medium Enterpreses
Authors: Supriyati  , Bahri R S , Komarudin E
Published: November 2019

The research objective is to design a boarding school management model in accordance with the computerized of International Financial Report Standard(IFRS) approach for Small Medium Enterprises(SMEs) and Improving Boarding School Management in order to compete and have a competitive advantage in the face industry 4.0. The research method used by researchers was a descriptive analysis method and exploratory method. The type of data used was primary, secondary and observational data in Islamic boarding schools in the form of samples in data collection. The results of this study are to design a financial statement model with IFRS approach for SMEs and Improve Islamic Boarding School Governance with a good corporate governance approach to complement and have a competitive advantage in the face industry 4.0. Dynamic changes with good governance from pesantren in Indonesia in calling for modernity do not always eliminate the value of pesantren in the face of the industrial era 4.0. The financial statements based on IFRS for SMEs to be able to win the challenge by playing an ideological struggle and the sophistication of information and communication technology as well as globalization flows have caused various changes in all aspects of Islamic boarding schools in prioritizing Islamic values.
Integration of Passive Infrared Sensor with Closed-Circuit Television
Authors: Ilmi M
Published: November 2019

The idea of writing this paper originated from a case study on the smart toilet room Smart Building UNIKOM where there was a shortage in the PIR sensor, the sensor was blocked by objects (walls). The purpose of this study is to cover up the weakness, the author tries to combine with the image motion sensor on the CCTV system as an addition that can provide input commands for the PIR sensor to delay the termination of the power source in the smart toilet room. The method used is by exploring existing literature and related research. From the search results, there has been no possibility of merging using only these two devices. Technical experiments are still needed on devices that might be used such as Raspberry Pi, Arduino or others.
Probability Analysis of Coffee Sales Using Markov Theory
Authors: Anthara I M A , Salim E
Published: November 2019

The purpose of this research is to find out the opportunity to move from a coffee brand to another coffee brand in a certain period of time and then, make a prediction of the chances of further coffee transfer until the steady state condition is obtained. This research is motivated by the phenomenon of selling three brands of coffee in one of the stalls in the Garut area. The method that used in this research was “Markov Theory” in which the time span used was the number of sales of each brand of coffee within two months. From the results of observations, there are three coffee brands that are most in demand by consumers, namely “ABC” Coffee, “Luwak White” Coffee and “Kapal Api Mix” Coffee. From the results of the analysis, the steady state conditions of the sales of the three coffee brands were obtained at the sixth month with the sales probability value for ABC coffee, Luwak White Coffee coffee, and Kapal Api Mix coffee, each of which was 31.28%, 21.66%, and 47.06%. When viewed from the results of research that has been obtained, it can be concluded that the probability of selling the three coffee brands is quite even and this can be a consideration for sellers to be able to provide the three coffee brands more than the other brands so that the sales of the three coffee brands will increase.
Gravity-Driven Agent-Based Model for Simulation of Economic Growth a Point Along a Highway
Authors: Suheri T , Viridi S
Published: November 2019

Aim of this research is to get number of rest area visitors. As the simulation method, gravity model (GM) used to generate potential that can attract agent to Pendle between the two cities and to visit a rest area and agent-based model (ABM) used to govern the motion of agents from one city to the other and for entering and leaving the rest area. As the results, it observed that meaningful pattern could interpreted monthly. By differencing two types of agent, the red and the blue ones, where the first need to use rest area and the second not, composition of agent has also a role in determining number of rest area visitor. In addition, as implication there is also favourable rest area due to distance from the city where the agents are coming from. Finally, it concluded that composition of agents and position of rest area influence number of rest area visitors.
Evaluating the Performance Employee Using TOPSIS
Authors: Lingga M
Published: November 2019

The aim of this study is to make a decision support system using the Technique for Ordered Preference By Similarity To Ideal Solution (TOPSIS) method for evaluating the performance employee of BJB bank. The system was developed with the waterfall development model and the PHP programming language. This study use a TOPSIS Method that is is a Multi Criteria decision making method to identify this study. The final results of the system in the form of an alternative sequence of data (ranking) of the best employees based on preference values obtained from the calculation results. This decision support system will be used by BJB bank as a supporter in making decisions to determine the best employees in the office.
E-Supply Chain Management Model for Garment & Textile Industry with Limitation of Technological Capabilities
Authors: Sabrina P N , Maspupah A , Umbara F R
Published: November 2019

Electronic Supply Chain Management (E-SCM) can be implemented by collaborating several electronic concepts for business process such as E-Transportation, E-Distribution, E-Fulfilment, Enterprise Resource Planning (ERP) and Warehouse Management System (WMS). These concepts require high technology, expensive implementation, high skill and cost in development. Garment and textile are the most numerous industries in Indonesia, especially in West Java, E-SCM can increased efficiency and effectively for textile or garment companies, but E-SCM development requires high costs and high technology. These are problems when many garment and textile companies in Indonesia have limited capabilities of technology. In this research we design new E-SCM model with Value Chain Analysis approach and used Software Architectural Design to make the model. We divided E-SCM system for garment and textile industry in multiple layers and then we collaborate with two existing E-SCM frameworks, namely E-Supply Chain Management Process and Technology Integration Framework and E-SCM Multi-Agent System Framework. We combine layers components with the relevant layers of the existing E-SCM frameworks. The result is a new E-SCM model for garment and textile industry that can accommodate limitations of technological capabilities.
Analysis of Regression Algorithm to Predict Administration, Production, and Delivery to Accuracy of Delivery of Products in Cosmetic Industry
Authors: Gata W , Novitasari H B , Nurfalah R , Hernawati R , Shidiq M J
Published: November 2019

The purpose of this study is to apply a linear regression algorithm to predict the accuracy of product shipments using administration, production and delivery as attributes that will be compared with existing targets which are the results of agreements between companies and customers used. as the dependent variable. In this study it was found that a linear method is feasible and effective for predicting administration, production and delivery of targets for accuracy of product shipments in the company. From the results of the prediction formula obtained, the prediction formula is implemented in the July 2018 data as test data. The results obtained from the prediction formula have an accuracy of 91.67%. From previous studies, which say that linear regression is feasible and effective for data use, they must make predictions. Likewise with this research where the results obtained in testing data are feasible and effective for the company.
Flexible reduced graphene oxide supercapacitors processed using atmospheric-pressure plasma jet under various temperatures adjusted by flow rate and jet-substrate distance
Authors: Fan Ching-Feng , Chien Yi-Chia , Hsu Cheng-Che , Cheng I-Chun , Chien Li-Hsien , Chen Jian-Zhang
Published: November 2019

We vary the substrate temperature by adjusting the nitrogen flow rate and jet-substrate distance during nitrogen atmospheric-pressure plasma jet (APPJ) processing of screen-printed reduced graphene oxides (rGOs) on carbon cloth. The APPJ-processed rGOs on carbon cloth are then used as electrodes for supercapacitors. Increasing the nitrogen flow rate could reduce the gas temperature and enhance the reactivity of the reactive plasma species. Typically, lowering the temperature slows down the chemical reaction; however, increased reactivity of the reactive plasma species at the same jet-substrate distance could compensate the temperature effect. A nitrogen APPJ could improve the wettability of the screen-printed rGOs on carbon cloth. We found that 20-s APPJ treatment increases the areal capacitance from 6.2 mF cm−2 (without APPJ treatment) to 22.4 mF cm−2 (700 °C, 30 slm), as evaluated by galvanostatic charging/discharging (GCD) measurements under a constant current of 0.25 mA. Further, 20-s nitrogen APPJ processing at temperatures of ∼600 °C–700 °C could obtain the best areal capacitance value. The capacitance value of the fabricated flexible rGO supercapacitor remains at similar level after 1000-cycle mechanical bending test with a bending radius of 5 mm.
Theoretical frequency limit of organic field-effect transistors
Authors: Kim Chang-Hyun
Published: November 2019

In this paper, a new theoretical model for the ac transit frequency of organic field-effect transistors is proposed. The model is built upon an advanced physical description of the contact resistance as a key mathematical component. Such a treatment self-consistently and predictively correlates the transit frequency to a number of materials, geometrical, and operational parameters. By navigating a broad parametric space, it is found that the ambitious gigahertz operation is observable only in highly downscaled devices, and the intrinsic carrier mobilities and charge-injection barriers required to reach that regime are specified.
Effect of direct-current operation on the electrochemical performance and structural evolution of Ni-YSZ electrodes
Authors: Liu Qinyuan , Zhang Qian , Voorhees Peter W , Barnett Scott A
Published: November 2019

The effect of electrolysis operations on Ni-YSZ fuel electrode stability was studied at different current densities and fuel mixtures during 1000 h life tests. For a typical electrolysis mixture of 50% H2/50% H2O and 0.6 A cm−2 current density, cell ohmic resistance values were reasonably stable and no structural changes occurred. However, for more reducing conditions (97% H2/3% H2O), increasing the current density above 0.4 A cm−2 increased the ohmic resistance accompanied by significant electrolyte degradation including fracture and void formation at grain boundaries. Numerical analysis was carried out to determine the effective oxygen partial pressure across the electrolyte. The results show that the oxygen partial pressure values at high current density and low steam content may be low enough to reduce zirconia to form a Ni-Zr alloy product, initiating the observed electrolyte structural degradation.
Maximal estimate and integral operators in Bergman spaces with doubling measure
Authors: Pang Changbao , Perälä Antti , Wang Maofa , Guo Xin
Published: November 2019

The boundedness of the maximal operator on the upper half-plane

Π

+

\Pi ^{+}

is established. Here

Π
+

\Pi ^+

is equipped with a positive Borel measure

d
ω
(
y
)
d
x

d\omega (y)dx

satisfying the doubling property

ω
(
(
0
,
2
t
)
)
≤
C
ω
(
(
0
,
t
)
)

\omega ((0,2t))\leq C\omega ((0,t))

. This result is connected to the Carleson embedding theorem, which we use to characterize the boundedness and compactness of the Volterra type integral operators on the Bergman spaces

A

ω

p

(

Π

+

)

A_{\omega }^{p}(\Pi ^{+})

.
Level curves of rational functions and unimodular points on rational curves
Authors: Pakovich Fedor , Shparlinski Igor
Published: November 2019

We obtain an improvement and broad generalisation of a result of N. Ailon and Z. Rudnick (2004) on common zeros of shifted powers of polynomials. Our approach is based on reducing this question to a more general question of counting intersections of level curves of complex functions. We treat this question via classical tools of complex analysis and algebraic geometry.
Solutions of Navier–Stokes–Maxwell systems in large energy spaces
Authors: Arsénio Diogo , Gallagher Isabelle
Published: November 2019

Large weak solutions to Navier–Stokes–Maxwell systems are not known to exist in their corresponding energy space in full generality. Here, we mainly focus on the three-dimensional setting of a classical incompressible Navier–Stokes–Maxwell system and—in an effort to build solutions in the largest possible functional spaces—prove that global solutions exist under the assumption that the initial velocity and electromagnetic fields have finite energy, and that the initial electromagnetic field is small in

H
˙

s

(

R

3

)

\dot H^s\left ({\mathbb R}^3\right )

with

s
∈

[

1
2

,

3
2

)

s\in \left [\frac 12,\frac 32\right )

. We also apply our method to improve known results in two dimensions by providing uniform estimates as the speed of light tends to infinity.

The method of proof relies on refined energy estimates and a Grönwall-like argument, along with a new maximal estimate on the heat flow in Besov spaces. The latter parabolic estimate allows us to bypass the use of the so-called Chemin–Lerner spaces altogether, which is crucial and could be of independent interest.
Flexible stability and nonsoficity
Authors: Bowen Lewis , Burton Peter
Published: November 2019

A sofic group

G
G

is said to be flexibly stable if every sofic approximation to

G
G

can be converted to a sequence of disjoint unions of Schreier graphs by modifying an asymptotically vanishing proportion of edges. We establish that if

P
S
L

d

(

Z

)

\mathrm {PSL}_d(\mathbb {Z})

is flexibly stable for some

d
≥
5

d \geq 5

, then there exists a group which is not sofic.
Upper bounds for higher-order Poincaré constants
Authors: Funano Kei , Sakurai Yohei
Published: November 2019

Here we introduce higher-order Poincaré constants for compact weighted manifolds and estimate them from above in terms of subsets. These estimates imply upper bounds for eigenvalues of the weighted Laplacian and the first nontrivial eigenvalue of the

p
p

-Laplacian. In the case of the closed eigenvalue problem and the Neumann eigenvalue problem these are related to the estimates obtained by Chung-Grigor’yan-Yau and Gozlan-Herry. We also obtain similar upper bounds for Dirichlet eigenvalues and multi-way isoperimetric constants. As an application, for manifolds with boundary of nonnegative dimensional weighted Ricci curvature, we give upper bounds for inscribed radii in terms of dimension and the first Dirichlet Poincaré constant.
Davies’ method for heat-kernel estimates: An extension to the semi-elliptic setting
Authors: Randles Evan , Saloff-Coste Laurent
Published: November 2019

We consider a class of constant-coefficient partial differential operators on a finite-dimensional real vector space which exhibit a natural dilation invariance. Typically, these operators are anisotropic, allowing for different degrees in different directions. The “heat” kernels associated to these so-called positive-homogeneous operators are seen to arise naturally as the limits of convolution powers of complex-valued measures, just as the classical heat kernel appears in the central limit theorem. Building on the functional-analytic approach developed by E. B. Davies for higher-order uniformly elliptic operators with measurable coefficients, we formulate a general theory for (anisotropic) self-adjoint variable-coefficient operators, each comparable to a positive-homogeneous operator, and study their associated heat kernels. Specifically, under three abstract hypotheses, we show that the heat kernels satisfy off-diagonal (Gaussian-type) estimates involving the Legendre-Fenchel transform of the operator’s principle symbol. Our results extend those of E. B. Davies and G. Barbatis and partially extend results of A. F. M. ter Elst and D. Robinson.