Proceedings of the 9th Balkan Conference on Informatics最新文献_第4页

Security Improvement in a Modified Merkle-tree: Computation and Storage Comparison Between Different Cloud Providers 改进的默克尔树的安全性改进:不同云提供商之间的计算和存储比较

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351569

I. Chenchev

{"title":"Security Improvement in a Modified Merkle-tree: Computation and Storage Comparison Between Different Cloud Providers","authors":"I. Chenchev","doi":"10.1145/3351556.3351569","DOIUrl":"https://doi.org/10.1145/3351556.3351569","url":null,"abstract":"Two of the very well-known hash algorithms from SHA2 (SHA-2) family include SHA-256 and SHA-512. Nowadays, there exists another hash algorithms family -- SHA3(SHA-3), which includes SHA3-256 and SHA3-512 algorithms, also known as Keccak algorithms. This paper provides a comparison of the empirical performance calculations with these 4 algorithms with different input volumes of sequential data (where every next slice of information is dependent of previous one) to make it impossible for parallel computation. For the purpose of calculations, 4 totally different environments are used but with exact number of CPUs and approximately similar amount of memory (using only standard instances types) -- one personal computer from one side and 3 of the biggest public cloud providers from another -- Amazon AWS (t2.medium), Microsoft Azure (Standard D2s v3) and Google Cloud (n1-standard-2). The purpose of the research is to compare these environments in terms of additional compute calculations and additional storage space (volumes and prices) for the presented new security improvement of the Merkle-root calculation. The Merkle-root is an integral part of the blockchain and therefore, security improvement of this component is a security improvement of the whole blockchain structure.","PeriodicalId":126836,"journal":{"name":"Proceedings of the 9th Balkan Conference on Informatics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126953873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Emerging and secured mobile ad-hoc wireless network (MANET) for swarm applications 新兴的、安全的移动自组织无线网络(MANET)用于群应用

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351557

A. Anguelov, R. Trifonov, Ognian Nakov

{"title":"Emerging and secured mobile ad-hoc wireless network (MANET) for swarm applications","authors":"A. Anguelov, R. Trifonov, Ognian Nakov","doi":"10.1145/3351556.3351557","DOIUrl":"https://doi.org/10.1145/3351556.3351557","url":null,"abstract":"At present, the technique of coordinating a team of robots in a manner that is responsive to communication failures, presents itself as an actual challenge. In swarm scenarios where the concept for the teams of robots requires performing cooperative tasks, robots need to be enforced to communicate with each other in the background while executing specific collaborative missions. In order to achieve complex tasks in real-time beyond their individual capability, multi-robot systems (MRS) require a stable, sustained and secure stream of data exchange. Typically, this technique also requires an approach of communication and synchronization among the robots known as swarm R2R (robot to robot) communication in real time [1]. This paper presents a theoretical concept for a wireless mesh robot network that can be protected against electromagnetic interference (EMI), electromagnetic jamming, RF denial-of-service (DoS) attacks, and eavesdropping. The team behind this paper aims to present and propose a conceptual model for a hybrid short-range modular wireless transceiver (HSMWT) used in a distributed network environment. Specific issues on designing HSMWT based on the light and sound mediums for this environment will be explored.","PeriodicalId":126836,"journal":{"name":"Proceedings of the 9th Balkan Conference on Informatics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125667492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Software technologies skills: A graph-based study to capture their associations and dynamics 软件技术技能:基于图形的研究，以捕获它们的关联和动态

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351565

Konstantinos Georgiou, M. Papoutsoglou, A. Vakali, L. Angelis

{"title":"Software technologies skills: A graph-based study to capture their associations and dynamics","authors":"Konstantinos Georgiou, M. Papoutsoglou, A. Vakali, L. Angelis","doi":"10.1145/3351556.3351565","DOIUrl":"https://doi.org/10.1145/3351556.3351565","url":null,"abstract":"Software design and development technologies evolve very fast and in unpredicted rates, posing many challenges for programmers who strive to use them properly and to be up-to-date, especially since software development demands teamwork and collaboration. As a result, Question and Answer (Q&A) sites, like Stack Overflow, have seen large growth. The questions are characterized by tags, which support developers to easily trace their topic of interest. Very often, these tags refer to technologies that are connected or serve the same purpose. This work is motivated by the fact that despite the volume of questions and technologies change over time, tags inter-connections carry insightful information since they can be utilized to monitor the technology trends and their dynamics given technologies fast simultaneous evolution over time. This work recognizes the value of such connections, to reveal associations of technologies and to support the scientific community, which can be highly inspired by this study, using advanced data analysis tools. Benefits of the present study include early notification of the labor market needs, competency discovery and directions for educational planning. In the present study, graph theory principles and tools were employed to profile chronologically the evolution and the associations of technologies related to tags, and the experimentation carried out has involved the entire set of Stack Overflow questions posted during a decade, between 2008 and 2018. Very interesting conclusions are summarized based on the tags related to Computer Science Technologies (Hard Skills) analysis, revealing non-evident software technologies skills, associations and dynamics.","PeriodicalId":126836,"journal":{"name":"Proceedings of the 9th Balkan Conference on Informatics","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129327037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Proportionate (m,k)-firm Scheduling for Multiprocessor Systems 多处理器系统的比例(m,k)稳定调度

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351579

Ivaylo Atanassov

引用次数: 0

Arduino and Numerical Mathematics Arduino与数值数学

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351590

D. Herceg, D. Herceg

引用次数: 3

An Experimental Comparative Performance Study of Demosaicing Algorithms on General-purpose GPUs 通用gpu上去马赛克算法性能的实验比较研究

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351561

G. Zapryanov, I. Nikolova

{"title":"An Experimental Comparative Performance Study of Demosaicing Algorithms on General-purpose GPUs","authors":"G. Zapryanov, I. Nikolova","doi":"10.1145/3351556.3351561","DOIUrl":"https://doi.org/10.1145/3351556.3351561","url":null,"abstract":"The image registration by digital still cameras and video cameras requires color filters to be posed onto the photosensitive sensors (CCD or CMOS). The filters are arranged in patterns across the face of the image sensing array. The conventional color filter array (CFA) capture only one color component at each image pixel. The missing colors in the raw sensor data are interpolated by a process called CFA interpolation or demosaicing. Quality of the full-color reconstruction process is mostly relied on demosaicing method applied. Most of the current demosaicing methods are computationally expensive and often too slow for real-time scenarios. Many industrial applications require real-time and high quality demosaicing solutions, and quite often slow image reconstruction process is a real bottleneck. The purpose of this research is to present a comparative performance study of demosaicing algorithms on general-purpose GPUs. The experimental results of CUDA-based implementations of two state-of-the-art and widely applied in practice CFA algorithms are presented. The performance efficiency is assessed and analyzed by experimental studies on a set of real photographic test images on two general-purpose graphic cards. The obtained results demonstrated the benefit of exploiting the contemporary GPUs in speeding up the demosaicing process, especially for practical applications that need to meet real-time and high-speed video processing requirements combined with high quality of the full-color image reconstruction.","PeriodicalId":126836,"journal":{"name":"Proceedings of the 9th Balkan Conference on Informatics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131802425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applying a quantum amplification over a system for image feature matching and image recommendation 应用量子放大系统进行图像特征匹配和图像推荐

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351564

D. Andreev, M. Lazarova

引用次数: 1

Deep Learning in Brain Computer Interfaces 脑机接口中的深度学习

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2019-09-26 DOI: 10.1145/3351556.3351594

P. Georgieva

引用次数: 2

Proceedings of the 9th Balkan Conference on Informatics 第九届巴尔干信息学会议论文集

Proceedings of the 9th Balkan Conference on Informatics Pub Date : 2013-09-19 DOI: 10.1145/3351556

K. Diamantaras, Georgios Evangelidis, Y. Manolopoulos, C. Georgiadis, P. Kefalas, D. Stamatis

引用次数: 0