Android Smartphone Device Research Articles

Using Digital Forensics for Android Smartphone Devices to aid Criminal Investigations

In the past decade, there has been an exponential adoption and ownership of smartphones by billions of users worldwide. However, as smartphone usage increases, criminals have taken advantage of them for illicit or criminal purposes. In criminal investigations, smartphone data has become an invaluable source of information. This study focuses on constructing a snapshot of Android-operated smartphone data to assist investigators in answering critical investigative questions. A thorough review of the literature with regard to the use of smartphone evidence in criminal cases, with the goal of emphasising the investigative phase and the supportive role of mobile data evidence in guiding investigations will be performed. In order to identify additional persons of interest and develop a thorough understanding of the case, the methodology will entail analysing user profiles, smartphone usage patterns, communication logs, application usage, geographic lookups, and device interactions. By conducting a thorough examination of relevant literature, designing a suitable model, and executing a case study, the study intends to offer valuable perspectives on the creation of timelines or visual representations derived from smartphone data. The results of this study will contribute to improving the efficacy of mobile forensics in assisting investigators and facilitating the use of Android-operated smartphone data as supporting evidence in criminal investigations.

Aplikasi Simulasi Berkendara dengan Metode Fuzzy Logic Menggunakan Phonegap

Android-Based Car Driving Simulation Application is an application used to obtain information about driving and caring for a car using smartphone support media. This is based on the increase in car accidents from year to year. The lack of information and the lack of knowledge of car drivers about driving information has made the author make a Car Driving Simulation application for the needs of visitors in using and accessing this application. Remembering technology is like a gadget that is no longer difficult to obtain, in fact it is possible for all people to have it. The application is designed with a smartphone that uses the Android operating system. Applications are made based on information needs for motorists. This application has gone through the stages of testing on four Android smartphone devices. This application is made using Phonegap with HTML and CSS programming languages and runs on the Kitkat version of the Android operating system as a minimum requirement.

Rancang Bangun Aplikasi Aplikasi Iuran Sampah RT/RW Menggunakan Metode Rapid Application Development Berbasis Android

RT047/RW008 or Jl. Aries is a Neighborhood Association located in Sungai Besar Village, Banjarbaru City, South Kalimantan province. Within this RT environment, weekly and monthly activities are often held. One of the activities in this area is the monthly waste fee. This activity has been around for a long time when this environment was formed. However, in this monthly waste fee activity, we still use the recording method by recording data on a physical citizen membership fee card. In addition, the manufacture of this garbage contribution card still uses the service of making a contribution card which requires traveling and also incurs some costs. In the process of monthly waste contribution activities, it often results in the loss or damage of the citizen membership dues card, in which the treasurer has to make another card at the contribution card making service. Based on the problems found, a solution to the problem that can be found is to design an Android-based application that can run on Android Smartphone devices. This application will be designed using the Rapid Application Development method which will go through the process of data collection to application design. This application can perform the administrative process of digital waste dues. In addition, in the application there is also a reminder feature that will be sent to Whatsapp for every registered member of the group. Because this application runs on Android Smartphone devices, it can make it easier for users to input data and change data anywhere and anytime. The method used for designing this application is to analyze to find out what is needed in an application that you want to build. The final result of the implementation process in the form of Java programming and test results by users. By using the white box testing and black box testing methods, the result is that the application can run well and in accordance with the needs required by the user. With this android application, the RT environment can be more focused and become an RT that can be in line with current technological developments

Implementasi MIT App Inventor dan Sensor Piezoelectric pada Prototipe Piano berbasis Arduino Mega 2560

Embedded systems that are driven by microcontrollers have been produced so many innovative products in almost all fields including in the field of music. Using this microcontroller makes the products easier to use by the wider community, even though they have never studied it at all. In this study, the piano becomes the object of this study. Design of this Piano prototype was implemented the Arduino Mega 2560 Microcontroller and also the Piezoelectric Sensor. This Piezoelectric sensor has the main function as a tone generator on this Piano prototype, while the Arduino Mega 2560 is the brain of the prototype which will formulate the scale generated by the sensor and store it, Arduino Mega also has a Bluetooth connection facility so that the prototype can be connected to an Android Smartphone with easy. The HC-05 Bluetooth Module has a choice of 2 connectivity modes (receiver and transceiver) and flexibility is realized with the HC-05 Bluetooth Module combined with the MIT App Inventor which allows musicians to be able to choose the song they want to play and that which has been made can be connected to an Android Smartphone device therefore the prototype is equipped with the MIT App Inventor as a visual object for creating applications that can be run on an Android Smartphone. One of the advantages of this prototype is that the user does not need to memorize or understand the score, simply by following the instructions from the LED which will light up according to the tone played. The results of testing and analysis show that the melody sound produced by Prototype Piano can work quite well with the success of an average value of 0.20 Hz and an average error percentage value of 6.88%.

Augmented Reality Based Learning App for Children with Hearing Disorder

Abstract: The pandemic hits the world today has made teachers and parents to develop attractive learning media for young learners/students to keep them excited while learning from home. Android smartphone devices are currently widely used for interaction media between children’s and teachers during learning and teaching from home. From this Method, software developers developed learning media using Augmented Reality that can be easily accessed from Android smartphone for young students. This application focuses on creating learning media and structures based on Android using Augmented Reality (AR) technology. The AR application was made using Unity with Vuforia SDK which is A software development tool. It is used to track down an target image so that the AR objects can be displayed on the screen in augmented form. Vuforia SDK detects target image by comparing captured images with target image which are stored in the database. This application resulted threedimensional AR objects, two-dimensional AR objects which are ready to be used as learning media which are feasibly to evaluate student’s skills after learning through AR objects.

Fall Detection using Sensors on a Smartphone

A work accident on a technician causes injury. When doing work, even though the technician is equipped with work safety, there are still factors that can cause accidents intentionally or unintentionally. The development of technology is now more advanced. Now the industrial revolution has reached the era of 4.0. Its progress is accompanied by information technology that is growing very rapidly. Many internets of things devices can already be used in everyday life. In today's life, the use of IoT devices has become a habit of today's modern society. For example, to travel using public transportation, there are many mobile apps that are connected to transportation providers. Including trade, the number of marketplaces has caused the growth of smartphones to be very fast. Smartphones are now equipped with many sensors, ranging from GPS sensors, wi-fi sensors, temperature sensors, and various sensors. Often the technicians in charge of climbing towers or heights are never caught by management or project leaders. Even though this causes losses both losses for technicians and losses for management. Therefore, how to monitor the technicians to be careful in carrying out their duties. Android smartphone devices have many sensors. Sensors in Android are used as a fall detection tool. By using Android sensors, the use of Internet of Thing sensors on smartphones will produce very useful monitoring tools. The use of Flutter framework as a medium for utilizing the accelerometer sensor and gyroscope sensor as a fall detection tool. This study aims to create a prototype of a fall detection application system.

Sistem Pemantauan Gas Benzena dengan Aplikasi Blynk

Benzene gas is a material widely used in the laboratory as a solvent. Benzene gas can be harmful to people. Therefore, this study aims to measure and monitor benzene gas levels with the Internet of Things (IoT) platform as a monitoring and notification system on android smartphone devices. The sensor used is MS 1100 to detect benzene gas and transmit input signals. The NodeMCU microcontroller processes these signals. This wifi module in NodeMCU sends the sensor’s value to the Blynk IoT platform to display in graph form. This value is processed under the program and it meets the setpoint then the system provides notifications to users through the Blynk application on android smartphone devices as well as activating buzzer and exhaust fans in the laboratory room. The result showed that monitoring of benzene gas in the laboratory as 0.17 ppm.

Augmented Reality Based Digital Practicum Card Design and Implementation during the COVID-19 Pandemic

ABSTRACT: This study aims to design a DPC (Digital Practicum Card) application in the practice of learning basic automotive subjects. The application made is a digital practicum tool based on AR (Augmented Reality). The method in application development uses the MDLC (Multimedia Development Life Cycle) model through six stages of the development process, namely: Concept, Design, Material Collection, Assembly, Testing, and Application Distribution. The concept stage begins with the process of analysing the needs of automotive practicum learning, designing interfaces, developing 3D ( Three-Dimensional ) models with a blender, assembling applications with unity, testing systems, and distributing digital practicum card applications. The DPC application helps students carry out virtual experimental exploration activities on basic automotive materials without being limited by space and time, so that practicum learning becomes easy and can improve the quality of learning. The results of limited application testing for mechanical engineering students show that the package (apk) of the digital practicum card application can be installed on an Android smartphone device, the camera can read markers and generate 3D models of automotive objects normally. In addition to testing from the hardware and software aspects, the DPC application can be used by mechanical engineering students as a practical tool and an average of above 80% states that DPC can be used easily, and as a fun automotive practicum learning tool. KEY WORDS: Augmented Reality; Virtual Laboratory; Digital Practicum Card. About the Authors: Dede, M.Kom. is a Student of Doctoral Candidate at the Technological and Vocational Education Study Program SPs UPI (School of Postgraduate, Indonesia University of Education), Jalan Dr. Setiabudhi No.229 Bandung 40154, West Java, Indonesia. Prof. Dr. Ade Gaffar Abdullah and Prof. Dr. Budi Mulyanti are the Lecturers at the Technological and Vocational Education Study Program SPs UPI in Bandung, West Java, Indonesia. E-mail address: d32@upi.edu Suggested Citation: Dede, Ade Gaffar Abdullah & Budi Mulyanti. (2021). “Augmented Reality Based Digital Practicum Card Design and Implementation during the COVID-19 Pandemic” in EDUCARE: International Journal for Educational Studies , Volume 14(1), August, pp.19-34. Bandung, Indonesia: Minda Masagi Suci and ASPENSI with ISSN 1979-7877 (print) and ISSN 2621-587X (online). Article Timeline: Accepted (June 1, 2021); Revised (July 3, 2021); and Published (August 30, 2021).

Design Of Detection System With Motion Sensor And Notification On Android Based On Arduino Microcontroller

The rapid development of technology nowadays makes people want to always be creative and triggers to create something that is needed to create a security system, because of today's economy makes many people act criminally by robbery or theft. An alternative security system that is often used today is to use CCTV (Closed Circuit Television), but the limitations in conducting CCTV control include that it still has to be monitored directly at the monitoring location only. From the problems that occur, the authors develop a thesis that is able to control and monitor by sending realtime alerts in the form of notifications to the user on an Android Smartphone device by building an IoT (Internet of Thing) based detection system using a PIR (Passive Infrared) motion sensor entitled "Design And Build A Detection System With Motion Sensor And Notification On Android Based On Arduino Microcontroller".

The Effectiveness Obstructive Sleep Apnea Monitoring Using Telemedicine Smartphone System (TmSS)

Data at the world health organization shows that around more than 100 million people worldwide suffer from Obstructive Sleep Apnea (OSA) and most sufferers go undetected. The purpose of this study is to develop an apnea monitor that can detect the symptoms of Obstructive Sleep Apnea using the Telemedicine Smartphone System (TmSS). The contribution of this study is the generation of telemedicine systems in sleep apnea monitoring devices. So that the monitoring tools can be effective and efficient when used, then the Obstructive Sleep Apnea monitoring tool is made with the TmSS system that can transmit data values wirelessly and in real-time. This tool uses a flex sensor to detect patient breathing. The output generated by the sensor is then conditioned on an analog signal conditioner (PSA) circuit. The signal output from the PSA is processed on the ATMega 328 microcontroller to get the respiration value which is then sent via Bluetooth HC-05 and displayed on an android smartphone device which will also display a warning notification in the event of stopping breathing (apnea). Based on the results of the measurement of respiration values compared with standard equipment produces the highest error value of 6.98% and the lowest of 0.00%. The tool can send data respiration values using the TmSS system properly. This tool can be implemented to detect the symptoms of Obstructive Sleep Apnea.

MODEL INFORMASI KEPUTUSAN BERBASIS TOPSIS APLIKASI ANDROID

Information Technology in spatial data processing has developed to a point where these results are in line with the application challenges required by natural resource management. In addition, the internet, geomatics, and telecommunications are rapidly changing the way natural resources are managed and protected. These provide more accurate and up-to-date information and are quickly available to users. Regional potential is a product that exists in an area that can be developed and is able to provide benefits to the local community and can be used as a supporter of the national economy. This understanding gives the connotation that optimal management planning is needed in order to achieve the intended expectations, so this decision support system is presented in a simple form for easy access on Android smartphone devices. Applications are made with Eclipse as an editor as well as compile and builder and SQLite for the application database.

Design of Detection System with Motion Sensor and Notification on Android Based on Arduino Microcontroller

The rapid development of technology nowadays makes people want to always be creative and triggers to create something that is needed to create a security system, because the difficulty of today's economy makes many people act criminally by robbery or theft. An alternative security system that is often used today is to use CCTV (Closed Circuit Television), but the limitations in conducting CCTV surveillance include that it still has to be monitored directly at the monitoring location. From the problems that occur, the authors developed a thesis that is capable of monitoring and monitoring by sending realtime alerts in the form of notifications to the user on an Android Smartphone device by building an IoT (Internet of Thing) based detection system using a PIR (Passive Infrared) motion sensor which entitled "Design of Detection System with Motion Sensor and Notification on Android Based on Arduino Microcontroller".

Design of Children Monitoring Application for Outdoor Activities Using a Smart Watch

The background of this research is the increasing of criminalization in children, one of which is kidnapping of children, Meanwhile many parents have to work so they don’t have enough time to be always close to their children. The purpose of this research is to develop applications that can help a parents to monitor the movements of their children’s outdoor activities. The application uses a smart watch to get the child’s GPS position and at the same time the device sends the last position of the child to the firebase database server. Parents can monitor the child’s movements through the android smart phone device in realtime. The application design uses several UML (unified modeling Language) diagrams namely use case diagrams, activity diagrams and squence diagrams. This application requires data objects including parent, child, family and child’s position (latitude and longitude). The main use cases in this application are sending position, case view, child location on map and view path of moving each child. The application can run only if there is an internet connection and the child uses smart time.

Design and Development of Tourism Geographical Information System of Semarang City Based On Android Mobile

The development of information technology that exists today is very rapid, making us to keep abreast of the development of these technologies. Technology is able to present all information quickly and instantly, leaving old patterns such as gathering information manually which may require more time. Information technology today is very effective and efficient as indicated by the speed of processing time and the accuracy of the information needed. One of them is the information about tourist attractions, which is currently increasingly in demand by people who want to vacation with friends, relatives and family. However, the lack of information about the location of attractions that want to be visited, especially for potential tourists from outside the area of Semarang, make the author interested in design and creating the Semarang City Geographic Tourism Information System Based on Android Mobile to facilitate the search for the nearest route to the desired tourist attraction. The method used is using the Geographic Information System based on the data from the Semarang City Culture and Tourism Service. The Semarang City Tourism Geographic Information System Based on Android Mobile is a solution to problem solving as a medium to obtain information and tourism locations in the Semarang, which is applied in Android Smartphone devices, especially for the people from outside the city of Semarang.

Implementation of Blynk Internet of Things Platform for Benzene Gas Monitoring System on Density Laboratory

Density Laboratory using benzene as a solvent for hydrometer calibration activities. This study aims to monitor the gas content levels of benzene with platform Internet of Things (IoT) as a monitoring and notification system on Android smartphone devices. MQ-135 sensor module as a benzene gas detector sends the input signal to be processed by a microcontroller NodeMCU. Wifi module contained in NodeMCU transmits the values read by the sensors to Platform IoT Blynk to be displayed in graphical form. The reading from the sensor is processed according to the program and if it meets the specified setpoint value, the system provides notification to the user through Blynk apps on android smartphone devices, as well as activates the buzzer and the exhaust fan in the lab space density. From the results of the implementation of the benzene gas monitoring system obtained the average value of the gas content of the benzene di laboratory density room is 0.42 ppm which is below the value threshold set by Indonesian Ministry of Manpower Regulation No. 5 Yera 2018 on Workplace Safety Health and Environment.

Virtual gasoline engine based on augment reality for mechanical engineering education

This paper aims to create virtual gasoline engine based on Augment Reality which are used to study working principle of gasoline engine in mechanical engineering of higher education institution. The Application can help participants learn to understand the working principle of a gasoline engine with three-dimensional visualization (3D) through an android smartphone device. The current learning process is still using the practicum module and engine stand to carry out practicum activities, the method makes the participants learn bored in addition to having to share with other students because of limited time practicum that has been determined so that learning activities become less effective. Augmented Reality is a technological innovation that is currently developing where with the technology we can combine virtual objects into the real world directly with the form of three-dimensional (3D). The working principle of the gasoline engine will be presented using a three-dimensional multimedia visualization embedded in the application. The learning module consists of a didactic model and a form of learning. A special feature of this application is the use of three-dimensional visualization that can be operated via desktop computers and smartphones by utilizing the camera facility as a marker.

A Smart Voltage and Current Monitoring System for Three Phase Inverters Using an Android Smartphone Application

In this paper, a new smart voltage and current monitoring system (SVCMS) technique is proposed. It monitors a three phase electrical system using an Arduino platform as a microcontroller to read the voltage and current from sensors and then wirelessly send the measured data to monitor the results using a new Android application. The integrated SVCMS design uses an Arduino Nano V3.0 as the microcontroller to measure the results from three voltage and three current sensors and then send this data, after calculation, to the Android smartphone device of an end user using Bluetooth HC-05. The Arduino Nano V3.0 controller and Bluetooth HC-05 are a cheap microcontroller and wireless device, respectively. The new Android smartphone application that monitors the voltage and current measurements uses the open source MIT App Inventor 2 software. It allows for monitoring some elementary fundamental voltage power quality properties. An effort has been made to investigate what is possible using available off-the-shelf components and open source software.

Digital Talking Book

This paper, presents user friendly ways to read books for print disable individuals. Reading is the process of looking at a series of written symbols and making meaning from them. However, there, the print disabled who are, the blind, partially sighted, dyslexics, those with visual impairments, physically disabled, and learning-disabled who have difficulty in accessing print media information. Digital talking books are the significant technology for the print disabled community to access printed media information. The Digital Accessible Information System (DAISY) technology; it is an open international standard for accessible multimedia developed by libraries serving persons with print disabilities in collaboration with the target users around the globe. The proposed “Talking Book improves the blind users' ability to read digital daisy books. The main function of the talking book player; computer memory and retrieves bookmarks, automatically unzip downloaded zip files and convert them into readable manner. Additionally, it consists predefined gestures and voice commands to navigate through the pages in the diligence. This paper presents a user interface with an easy-to-distinguish layout, auditory output and gestural input that enables visually impaired people to interact with an Android smartphone device.

Duth: a user‐friendly dual‐factor authentication for Android smartphone devices

AbstractWith the pervasiveness of smartphones and the richness of mobile apps, many people are storing increasingly sensitive data on them, in greater quantities. In order to protect this sensitive information from misuse due to loss, or other accidental reasons, strong smartphone authentication has become imperative and has received considerable attention in recent years. However, when we directly implement traditional authentication schemes in smartphone devices, the balance between security and user‐friendliness of authentication becomes challenging, mainly because of the input‐in‐motion environments. In this paper, without adding extra hardware devices, we present a user‐friendly, dual‐factor authentication scheme called Duth, for Android smartphone devices. Specifically, the proposed Duth scheme is characterized by utilizing the spatial and time features of the user‐writing process as two factors of authentication; a user can be authenticated only if these two features are fulfilled. We implement Duth in Java as a library, which we make publicly available. With extensive discussions on parameter selection, we choose proper parameters and implement Duth on a smartphone with Android 2.3 for experiments, and the experiment results demonstrate that Duth can indeed achieve efficient and effective dual‐factor authentication. Copyright © 2014 John Wiley & Sons, Ltd.

Android Based Palmprint Recognition System

This paper aims to build a palmprint recognition system based on Android. Line detection and non-overlapping blocks methods used on the design of palmprint recognition system. Normalized Euclidean distance was used to match the two feature vector. The similarity degrees was measured by the smallest value. The method was applied to the system can result an accuracy rate about 91,32% (FMR = 5,2%, FNMR = 3,68%, T = 0,265). System testing was done as much as 2500 times to the 50 participants with 3 reference images of each user. The factor that influenced on system accuracy was the process of image acquisition. Palmprint images was taken directly by using camera on the android smartphone device.