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Queue theory is a theory that concerns the mathematical study of queues or rows.  waiting. A queue is a collection of entries or objects waiting for service. Before the patient or  The patient's family registering is expected to take a conventional queue number. This causes the patient  and the patient's family have to queue for a long time. In addition, patients and their families who  registering with a very large number of people there will be a dense crowd. This research design uses quantitative descriptive by using a design assessment questionnaire  physical android based outpatient registration queue number application. Descriptive quantitative method for  produce descriptive data in the form of scoring or assessment of the results of research respondents' questionnaires. The results of this study obtained the physical design of the -based Outpatient Registration Queue Number application  android for Nganjuk Health Center Patients. The physical design of the android-based outpatient registration queue number application at the puskesmas  nganjuk can make it easier to build applications.

Electrical equipment plays an important role in everyday life, from households, schools, hotels, offices, to industrial environments. Because it really helps humans in making work easier. The need for automated tools to facilitate human activities, makes the need for smart chips or microcontrollers increasing. A new breakthrough in the world of microcontrollers with the application of Arduino.Especially at SMPN 10 Salatiga, there are fish ponds and garden lights, which you forget to feed or not, while the officers forget to turn off the lights, causing the fish to die and the lights stay on even though it is noon. This study tries to implement Fish Feed Control and  automatic garden lights on and off using Arduino and scheduling, this is so that the fish stay healthy   and the garden lights can turn on or off according to the schedule desired by management. The author designed a garden lamp and automatic fish feed based on a case study at the school. The tool is designed with three sources of tool control. The first manual is pressing the fish feed manual button, the light switch and the reset button. Both semi-automatic, as a fish feeder, light ON/OFF and reset remote control with the Android application. The third auto is scheduled feeds and lights. This tool is designed to manage fish feed and garden area lighting. This tool is practical to use, inexpensive, useful, flexible and easy to build. The classification of this tool is sufficient for the needs of the school garden. Among the advantages of this tool is that it can be controlled remotely effectively 25 m without a hitch using the android application. The author hopes, this tool provides benefits and solves problems in schools.

This research was carried out by comparing the DS18B20 sensor and the MLX 90614 sensor to detect the accuracy of detecting human body temperature which is used to detect Covid 19 symptoms. In this experiment, 10 trials were carried out with different human segments detected using the sensor. In the experiment, it was found that the MLX90614 sensor is more suitable to be used for development with an IoT-based system because it does not need to come into contact with the skin of the human body. The MLX90614 sensor will detect the temperature and change it to one Celsius unit then send it to the firebase database which will then be picked up by the android application which is held by the security officer so that the temperature can be known remotely. When the temperature is more than 38.5 Celsius it will turn on the buzzer sound which can be heard from a distance which indicates the temperature is above 38.5 Celsius and on android will also display a danger sign

ABSTRACT The use of mobile devices with the Android operating system which are used as supporting media and supplements in improving learning outcomes combined with demonstration methods and discovery learning or demon-disco learning is needed to help students improve learning outcomes in hydroponic plant cultivation vocational competency subjects at SMK. Kristen Terang Bangsa, because the use of android-based applications can provide new experiences regarding the use of information and communication technology, as well as provide opportunities for students to be able to learn more independently. The concept chosen as a learning medium is to present material about understanding, introduction to parts, types, and quizzes containing questions about hydroponic cultivation of plants. This research uses the Research and Development (RnD) product development method, using 6 out of 10 research stages, namely potentials and problems, data collection, product design, design validation, design improvement, product testing. The result of this research is to produce learning media in the form of android-based applications. The validity value of the media expert is 2.6 which is declared feasible, while the validity value of the material expert is 3.6 which is declared feasible, and is able to increase the average value in the hydroponic plant cultivation vocational competency subject at the Terang Bangsa Christian Vocational School which Initially 67 (with 13 students who had not reached the KKM) to 80 (with 4 students who had not reached the KKM).

Assessment of employee performance is expected to know precisely the success in completing work. Employee performance appraisal is also useful for companies in providing feedback to employees and can be used as a basis for agencies to evaluate employee performance. Most government services currently utilize information technology as an information service to the public and the agency's internal services. In institutions, it is necessary to increase and develop the capabilities, knowledge and skills of its human resources, so that it is expected to be able to produce apparatuses that have competitive competencies. Therefore, the authors designed and built an employee performance appraisal system which was implemented using Electre and Web-based and Android methods. It is expected to be able to assist agencies in evaluating employee performance so that they can remain consistent in carrying out their duties as Civil Servants (PNS) within the scope of services to the community. This research uses the R&D method. researchers only use up to step 6. Based on the results of trials of 10 respondents who have assessed the decision making system using the electre method, that the application of employee performance appraisal using aggregate ranking can help provide information on the level of employee performance based on predetermined criteria. Respondents agree that this system is more efficient in assessing employee performance with an average of the old system = 43.50% while the new system is = 84.50%.

 Ungaran Mountain has a height of 2050 meters above sea level, this mountain is suitable for beginner climbers who want to know more about climbing hobbies, Ungaran climbers themselves only take about 3-5 hours, depending on the speed of walking, the climbing route is also quite light and very suitable for heating before starting to climb higher mountains. Thus many novice climbers who want to try to climb and conquer Mount Ungaran, armed with minimal experience of mountain climbing, the risks they face are even greater, ranging from getting lost, being hypothermic to death while climbing. To make it easier for Ungaran mountain climbers who are dominated by novice climbers in this study, the Ungaran Mountaineering Track and Monitoring Application Based on the Global Positioning System (GPS) on the Android System "which was built to make it easier for Ungaran mountain climbers to access information provided by Ungaran mountain climbers. needed to climb Mount Ungaran, and it is also useful for the team at base camp to monitor climbers who climb..

This study aims to examine and evaluate the results of the implementation of an android-based labor payroll system. The purpose of this research is to find out the description of the system, application implementation, problems, and solutions on android-based payroll at Mitra Indo Agro. The results of the study obtained are used to evaluate the factors and parts of the payroll system for this android-based application that needs to be improved. This study uses a qualitative descriptive research method. Determination of informants using snowball sampling technique where the research subjects as many as 4 employees who are directly related to the android-based payroll process. Data collection techniques are through field studies consisting of interviews, observations, documentation, and literature studies. Data analysis techniques through data reduction steps, data exposure, data interpretation and drawing conclusions. The data validation technique uses source triangulation. The data presentation technique uses a program flow (flowchart) and fishbone diagrams (fish bones). The results of the research have shown that the Android-based GajiQ system helps provide large databases with the CRUD (Create, Read, Update, Delete) method , automate reports such as attendance recap, salary calculations, payroll history reports and make it easier to find labor data. The implementation of the Android-based GajiQ application can be a new medium of choice for companies to manage payroll in real time, quickly, and accurately that does not involve many parties in making payroll, payments, and payroll procedures. Problems found by the system are still bugs or crashes, error messages such as app force close appear. 

This research produces Artificial Fiber Spinning Learning Media that applies Augmented Reality (AR) for Class XI Students of TPSB SMK Texmaco Semarang as a learning aid. so that it can be used as a modern, effective, and interactive learning medium. This application was made with the aim of completing the limitations of depicting objects in existing learning media, helping students to more easily learn the material, improving student learning outcomes, and increasing the variety of media in learning. This study uses the Research and Development (RnD) method, using 6 out of 10 research stages, namely potentials and problems, data collection, product design, design validation, design improvement and product testing. The final result of making this learning media is an application in the format android application, used on every android-based mobile phone. The validity value of the media expert obtained a value of 3.2 which was declared feasible, the results of the material expert validation test obtained a value of 3.6 which was declared very feasible, and was able to increase the average value of the artificial fiber spinning subject class XI TPSB SMK Texmaco Semarang which Initially 61.5% with 17 students who had not reached the KKM to 80.5% with 4 students who had not reached the KKM.

Irrigation is a land irrigation system by damming water sources. Irrigation as the provision, regulation and disposal of water to support agricultural needs. Irrigation is generally used by farmers, especially farmers in rice fields to irrigate and provide water supply to agricultural land, monitoring water stock in rice fields must be done frequently because rice water needs must be balanced with a lack of water supply or excess water supply in rice fields is not good for rice growth . So far, farmers have monitored irrigation channels manually, the location of the rice fields from the farmer's house often causes rice plants to experience scarcity because the floodgates are not opened when the water supply is running low or experiencing water supply. excess because the floodgates are opened for too long, this will greatly disturb the growth of rice plants. Making a monitoring and control system for irrigation channels using a water level sensor installed on the ESP 8266 microcontroller (Wemos D1), the system uses a programming language c. This tool can be used to open the irrigation door if the water supply in the rice fields is below the minimum limit and will close the water gate when the water supply has reached the maximum limit, the servo motor is used to open and close the floodgates. . . The monitoring results obtained will be displayed to users in real time through the android application interface and will be stored in the form of a text file on the storage media.

Cloud computing is a technology that makes the internet a center for managing data and applications. With computer users are granted access (login). Cloud is a metaphor for the internet, as the cloud is often depicted in computer network diagrams. Gayo’s openwork cloud application is an android bases application that utilizes Cloud computing technology in the form of cloud Platform as a Service (SAAS) function as the main container or basis for running the system that will use in sales and providing notification services for the search for souvenirs typical of Takengon, namely Kerawang Gayo. Cloud computing is a technology that makes the internet a central storage server for managing data and information. This technology also allows users to freely manage and access information available on cloud storage which is of course connected to the internet network. This gayo filigree is now being created as a result of the home craft industry being embroidered on the cloth. The craft produces various types of souvenirs such as bags, key chains, women’s robes, men’s shirts, caps, bracelets, wallets, prayer mats, tablecloths, pillowcases, cellphone covers, and women’s and men’s traditional clothes, skirts, and scarves. Using the prototyping method is a software development method in the form of a physical working model of the system that functions as an early version of the system.

Augmented Reality (AR) and Virtual Reality (VR) which are one of the top ten strategic technology trends for 2019 and continue to be developed massively in this 2020, have been widely applied in various mobile applications by many companies in this industrial revolution era 4.0. AR can be applied to help the promotion for housing developers where users can see the 3-dimensional shape of the types of houses offered, while VR allows users to explore each part of the house in a virtual 3D. Pre-existing brochures are used as markers for this application to work, so that AR and VR applications can be a complement to promotional media. The design method used in this paper is Research and Development (RnD). Salespeople can offer types of houses to prospective customers without having to print multiple brochures, but with just one brochure and one android smartphone to present, so the promotion costs are more efficient.   Keywords: AR, VR, house.

The development of smartphones today is very rapid and can not be separated in everyday life in finding information or making information and in all fields of work requires communication tools to access data and information, it is no wonder in terms of smartphone work being an inseparable part separate, this research I use smartphone especially Android which is currently one of the operational systems that are commonly used by the public especially Indonesia so that it can be used to help team performance in the field in this case Merchandiser in conducting Data Processing Asset Material Promotion Using Qr Code to monitor and control the allocation of promotional material assets in the field to facilitate reporting of promotional material assets. QR Code is a two-dimensional matrix code or barcode that comes from the word "Quick Response", where the contents of the code can be deciphered quickly and precisely, Optimizing the use of applications in this case QR code to facilitate monitoring and control of promotional materials in the field which will help merchandiser to help make it easier to do work in the field and directly connected to the admin computer at the head office, so it will be easy, fast, and accurate.

Utilization of a mobile device with the Android operating system that is used as a supporting medium and supplement in improving learning outcomes combined with demonstration and discovery learning or demon-disco learning methods is needed to help students improve learning outcomes in vocational competence subjects in hydroponic crop cultivation in vocational high schools Kristen Terang Bangsa, because the use of android-based applications can provide new experiences regarding the use of information and communication technology, as well as provide opportunities for students to be able to learn more independently. The concept chosen as a learning media is to explain the material about understanding, introduction of parts, types, and quiz containing questions about hydroponic plant cultivation. This research uses the Research and Development (RnD) product development method, using 6 out of 10 stages research that is the potential and problems, data collection, product design, design validation, design improvement, product trials. The results of this study are to produce learning media in the form of Android-based applications. The validity value of media experts is 2.6 which is declared feasible, while the validity value of material experts is 3.6 which is declared feasible, and is able to increase the average value in the subject of vocational competence in hydroponic cultivation in Christian Terang Bangsa Vocational Schools which initially 67 (with 13 students who had not yet reached KKM) to 80 (with 4 students who had not yet reached KKM).

In order to increase student interest in learning, increase grades and facilitate the understanding of biology subjects on the material of the human excretion system class XI Science. From a number of smarphone users in Indonesia, it turns out that most of the people are only intended for telephone, short message service (SMS), playing songs / videos, accessing social networks (facebook, twiter, BBM, Line, WhatsApp) and many playing games including students in high school. Negeri 2 Mranggen. The author uses data collection research methods including observation, interviews, questionnaires, R&D product development methods, prototype methods and object-oriented approaches. The equipment used in designing this system uses UML modeling. Use Case Diagrams include, Activity Diagrams, Class Diagrams, and Sequence Diagrams and the software used by the author is Android Development Tools (ADT) and MySQL as a database. Mobile learning media application is expected to help facilitate the needs of students to learn the material of the human excretion system online at any time without any place and time restrictions.

Aplikasi Semarang Guidance dibuat untuk memberikan informasi lokasi penting bagi masyarakat yang membutuhkan petunjuk jalan lokasi wisata. Hal ini didasarkan pada masih banyak masyarakat yang belum mengetahui lokasi terdekat tempat-tempat wisata. Penelitian ini menggunakan model pengembangan SDLC. Model analisisnya menggunakan Use Case, Activity, Class Diagram, E-R Diagram dan kamus data. Manfaatnya dapat memberikan kemudahan dalam mengetahui letak dan posisi geografis tempat wisata terdekat disekitar pengguna beserta informasi pendukung dengan melalui ponsel Android. Dalam aplikasi ini menginformasikan dan visualisasi objek dalam bentuk maps. selain itu terdapat rute untuk menuju objek wisata yang dipilih, pencarian objek wisata, dan menu pendukung lainnya. Aplikasi ini berbentuk mobile application dan juga web service dengan bahasa pemrograman untuk mobile application JAVA dan SQLITE sebagai database, web service PHP dan MYSQL sebagai database.