scholarly journals USING BLOCKCHAIN TECHNOLOGY FOR IMPLEMENTATION OF AN ANDROID GRAPHICS SIMULATION APPLICATION

2019 ◽  
Vol 7 (6) ◽  
pp. 105-118
Author(s):  
Jorge De Almeida Brito Júnior
Keyword(s):  
Present Article ◽  
Mobile Application ◽  
Hash Function ◽  
Consensus Algorithm ◽  
Practical Guide ◽  
Blockchain Technology ◽  
Android Platform ◽  
The Web ◽  
Technology Concepts

The Blockchain technology can be used for many purposes on the web, the main one being the financial branch, having in mind the present article clearly presents the technology concepts behind Bitcoin called Blockchain and is shown throughout the work to implementation of a mobile application developed in the Android platform, where it makes use of blockchain to simulate the operation of its own, being a practical guide to blockchain, can be used to teach technology to lay visually, the tool uses principles such as hash function, chain of blocks, consensus algorithm among others that are linked to the technology of crypto coins

scholarly journals Designing a Permissioned Blockchain Network for the Halal Industry using Hyperledger Fabric with multiple channels and the raft consensus mechanism

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Isti Surjandari ◽  
Harman Yusuf ◽  
Enrico Laoh ◽  
Rayi Maulida
Keyword(s):  
Supply Chain ◽  
Information Exchange ◽  
Information Disclosure ◽  
Spare Parts ◽  
Consensus Algorithm ◽  
Web Interface ◽  
Web Interfaces ◽  
Blockchain Technology ◽  
Work In Process ◽  
The Web

AbstractHalal Supply Chain Management requires an assurance that the entire process of procurement, distribution, handling, and processing materials, spare parts, livestock, work-in-process, or finished inventory to be well documented and performed fit to the Halal and Toyyib. Blockchain technology is one alternative solution that can improve Halal Supply Chain as it can integrate technology for information exchange during the tracking and tracing process in operating and monitoring performance. This technology could improve trust, transparency, and information disclosure between supply chain participants since it could act as a distributed ledger and entitle all transactions to be completely open, yet confidential, immutable, and secured. This study uses a Blockchain Network with three channels and uses raft consensus algorithm in designing web interfaces and testing their capabilities. From the web interface, there were no failures in the validity test during the invoke test and the query test. In addition, the web interface was also successfully tested to thwart the formation of a block in case of data input errors from the user. The server can also do the process as a provider of information and validator for the web interface. From the results of simulations conducted on the Blockchain Network that was made, Blockchain’s transaction speed is fast and all the transaction is successfully transferred to other peers. Thus, Permissioned Blockchain is useful for Halal Supply Chain not just because it can secure transactions from some of the halal issues, but the transaction speed and rate to transfer data are very effective.

scholarly journals An Overview of Blockchain Technology

2018 ◽  
Vol 4 (4) ◽  
pp. 1
Author(s):  
Karthik C
Keyword(s):  
Digital Signature ◽  
Hash Function ◽  
Emerging Technology ◽  
Consensus Algorithm ◽  
Public Key ◽  
Private Key ◽  
Linked List ◽  
Blockchain Technology ◽  
Distributed Ledger ◽  
A Chain

Blockchain Technology is an emerging technology nowadays. The Blockchain was first used as a Peer-to-Peer ledger for registering Bitcoin transactions. The blockchain is a singly linked list which consists of a number of transactions. The blockchain is a decentralized distributed ledger which consists of a number of blocks organized in the form of a chain. A block in blockchain consists of two parts data and hash pointer. The first block in the blockchain is known as genesis block. The transactions and data in the block are secured by cryptography. The data inside a block in blockchain can be anything like bank transactions, backup data etc., which are recorded chronologically and publicly. The Hash pointer of a block is a unique code generated by a hash function like SHA256, SHA-3 etc., the hash function used in bitcoin blockchain. A block consists of a public key and a private key, using hash function digital signature is generated to the block. This is how the data inside the blockchain is so secured. The blocks are added into the blockchain by verifying the transaction in the block, the transactions are verified by miners. The miners use consensus algorithm to solve the blocks.

scholarly journals Third Party Certification of Agri-Food Supply Chain Using Smart Contracts and Blockchain Tokens

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5307
Author(s):  
Ricardo Borges dos Santos ◽  
Nunzio Marco Torrisi ◽  
Rodrigo Palucci Pantoni
Keyword(s):  
Supply Chain ◽  
Mobile Application ◽  
Consumer Behaviour ◽  
Economic Incentives ◽  
Third Party ◽  
Smart Contracts ◽  
Proof Of Concept ◽  
Socially Responsible ◽  
The Public ◽  
Blockchain Technology

Every consumer’s buying decision at the supermarket influences food brands to make first party claims of sustainability and socially responsible farming methods on their agro-product labels. Fine wines are often subject to counterfeit along the supply chain to the consumer. This paper presents a method for efficient unrestricted publicity to third party certification (TPC) of plant agricultural products, starting at harvest, using smart contracts and blockchain tokens. The method is capable of providing economic incentives to the actors along the supply chain. A proof-of-concept using a modified Ethereum IGR token set of smart contracts using the ERC-1155 standard NFTs was deployed on the Rinkeby test net and evaluated. The main findings include (a) allowing immediate access to TPC by the public for any desired authority by using token smart contracts. (b) Food safety can be enhanced through TPC visible to consumers through mobile application and blockchain technology, thus reducing counterfeiting and green washing. (c) The framework is structured and maintained because participants obtain economical incentives thus leveraging it´s practical usage. In summary, this implementation of TPC broadcasting through tokens can improve transparency and sustainable conscientious consumer behaviour, thus enabling a more trustworthy supply chain transparency.

Designing a Mobile Chat Application Based on Android Platform

2021 ◽  
Vol 12 (4) ◽  
pp. 43-63
Author(s):  
Sorinel Căpuşneanu ◽  
Melinda Timea Fülöp ◽  
Dan Ioan Topor ◽  
Nicoleta Magdalena Iacob ◽  
Alina Georgiana Solomon ◽  
...  
Keyword(s):  
Mobile Phones ◽  
Mobile Application ◽  
Digital Data ◽  
Sudden Increase ◽  
Topical Issue ◽  
Mobile Platforms ◽  
Confidential Information ◽  
Android Platform ◽  
Pleasant Experience

Securing confidential information on mobile platforms has been, is, and will be a topical issue for specialists. In order to eliminate these vulnerabilities, specialized companies have made some patches, but these do not constitute a real guarantee that the same or any other applications will not be attacked and exploited without the users' will. Mitigating these attacks on smartphones can be achieved by securing mobile phones from both users and mobile providers. This article proposes the development of a chat application on the Android platform as a solution to ensure the security of digital data that is transferred through the available communication platforms. When designing this mobile application, the sudden increase in the number of users was taken into account so that the application is stable and creates a pleasant experience for them.

scholarly journals The Effects of Using a Fully Integrated Mobile Application to Access Learning Management Systems in Higher Education

2020 ◽  
Vol 26 (9) ◽  
pp. 1213-1229
Author(s):  
José Martín-Núñez ◽  
Susana Sastre ◽  
José Peiró ◽  
José Hilera
Keyword(s):  
Student Satisfaction ◽  
Student Performance ◽  
Mobile Application ◽  
Learning Experience ◽  
Learning Management Systems ◽  
Academic Major ◽  
Management Systems ◽  
Fully Integrated ◽  
Learning Management ◽  
The Web

The use of mobile devices in the classroom is increasingly frequent. However, the LMS are still not completely adapted to this format, preventing students from using all the LMS web-functionalities in their mobiles. Hence, we present and evaluate the use of a new mobile application fully integrated with Learning Management Systems (LMS). We examined access to LMS by 95 postgraduate university students, differentiating between the services accessed and the means used. Students belonged to four consecutive promotions. In the first two, access to the system was through the web, while in the third and fourth, an app fully integrated with the LMS was available. The results showed an overall increase in access to LMS, with a considerable reduction in access via the web in favor of access via the application. Significant differences were found in the access patterns to communication and assessment services depending on the students' age, gender, academic major and previous m-learning experience. Satisfaction with the LMS rose when the app was available, with greater growth within the academic major on IT and previous m-learning experience group. Finally, students with high performance accessed the system significantly more than those with low performance. In conclusion, the integration of the app with the system showed useful and efficient results. The app eased the use of the system, increased student satisfaction with LMS, and student performance improved with increased access.

scholarly journals Implementation of a Location Services Based Android Application and Accompanying Server Backend

2021 ◽  
Vol 15 (3) ◽  
pp. 310-317
Author(s):  
Kristijan Lukaček ◽  
Matija Mikac ◽  
Miroslav Horvatić
Keyword(s):  
Mobile Applications ◽  
Mobile Application ◽  
Web Application ◽  
Smart Phone ◽  
Location Information ◽  
Android Application ◽  
Location Services ◽  
Textual Data ◽  
Android Operating System ◽  
The Web

This paper is focused on the usage of location services in mobile applications that were developed for the purpose of reporting different events that are based on their location. The event that is intended to be generic and universal can, as in examples used in this paper, be the reporting of some occurrence to a city’s communal affairs office. Such a generic event can include both multimedia and textual data, in addition to location information obtained using mobile device running the app. The software solution that is described in this paper consists of a mobile application that was developed for the Android operating system and a web application that includes a series of PHP scripts that run on a dedicated server. The web application consists of a backend scripts that facilitate the communication of a smart phone and the server and frontend related scripts used by users and administrators to access and check the data and process the reported events.

Creating an Electronic Course on Programming in Python for the Android Platform

2021 ◽  
Vol 12 (4) ◽  
pp. 216-222
Author(s):  
N. K. Petrova ◽  
◽  
A. P. Mukhachev ◽  
A. A. Zagidullin ◽  
S. M. Koutsenko ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Mobile Application ◽  
Free Access ◽  
C Language ◽  
Python Language ◽  
C Compiler ◽  
Android Platform ◽  
Python Scripting ◽  
Scripting Language ◽  
Programming Algorithms

The description and principles of developing a mobile application for the Android platform that provides free access to electronic courses on teaching the basic structures of the Python language and the construction of template programming algorithms based on them are presented. The content of the course is based on the principle of comparative analysis with the C++ language, one of the goals of which is to differentiate the tasks for which it is more efficient to use either the Python scripting language or the C++ compiler. The developed application is logically integral, allows the possibility of supplementing with new data — examples, types of algorithms — and, no less important, is free.

scholarly journals Beacon-Based Fuzzy Indoor Tracking at Airports

Proceedings ◽  
2018 ◽  
Vol 2 (19) ◽  
pp. 1255 ◽  
Author(s):  
Josué Toledo-Castro ◽  
Pino Caballero-Gil ◽  
Nayra Rodríguez-Pérez ◽  
Iván Santos-González ◽  
Candelaria Hernández-Goya
Keyword(s):  
Web Service ◽  
Mobile Application ◽  
Short Response Time ◽  
Location Service ◽  
Emergency Situations ◽  
Real Time Tracking ◽  
Indoor Tracking ◽  
Airport Infrastructure ◽  
Secure Authentication ◽  
The Web

An application of Bluetooth beacons is here proposed to perform real-time tracking of the locations and movements of airport staff through different monitored airport infrastructure elements, such as rooms, terminals or boarding gates. With respect to this, the aim is to provide an efficient location service of airport workers and users through an indoor tracking controller based on fuzzy logic. For this purpose, a mobile application and a Web service have been implemented. This location knowledge may be decisive while performing common airport procedures or managing airport resources, staff or emergency situations aiming at ensuring a short response time. Likewise, the proposed system integrates an operational module of coordination to facilitate the communications of users at the airport. Besides, particular attention has been paid to the security of communication between mobile devices and the Web service, both regarding secure authentication of users and protection of confidentiality of information exchanged between airport staff.

Overview of Blockchain Technology Concepts

2020 ◽  
pp. 349-371
Author(s):  
C. Komalavalli ◽  
Deepika Saxena ◽  
Chetna Laroiya
Keyword(s):  
Blockchain Technology ◽  
Technology Concepts
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