Acta Informatica Pragensia, 2014 (vol. 3), issue 1

Analýza dopadu úniků dat na tržní hodnotu firem v období 2008 - 2012

Analysis of the Impact of Data Breaches on the Market Value of Companies in the Period 2008 - 2012

Tomáš Klíma, Adam Krbušek

Acta Informatica Pragensia 2014, 3(1), 1-7 | DOI: 10.18267/j.aip.312755  

In the last fifteen years we can observe significant rise in the number and seriousness of the data breaches among the companies dealing with customer data. The aim of many analyses was to determine the impact of these breaches on market value, focusing on the breaches prior to 2008. The aim of this article is to present the findings from the analysis focused on 27 companies that suffered data breach between 2008 and 2012.

O čitelnosti příloh datových zpráv v PDF na platformě OS X

On the Legibility of Data Message PDF Attachments on the OS X Platform

Tomáš Zahradnický

Acta Informatica Pragensia 2014, 3(1), 8-22 | DOI: 10.18267/j.aip.323900  

The Data Message Information System is a remarkable information system of the state infrastructure. Design of an information system of such importance should be done with much care also due to fact that if a design flaw appeared later, it could have severe impacts at the users. A flaw that will be discussed in this paper applies to a data message sending process of messages containing PDF attachments. Users with the default Safari web browser on OS X do not need to be always able to open such attachments. The paper analyses the situation and gives an answer to a question when will a PDF attachment be opened correctly and when not.

The Third World War? In The Cyberspace. Cyber Warfare in the Middle East.

Martina Knopová, Eva Knopová

Acta Informatica Pragensia 2014, 3(1), 23-32 | DOI: 10.18267/j.aip.338854  

This article aims to provide a brief and comprehensive introduction to the issue of cyber warfare and to display the recent development in this area. Geographically, it focuses on the Middle East region, since the vast majority of the most important recent cyber attacks appeared just in there or were connected to it. The first part of the article tries to define the key notion of cyber warfare, compares it to the standard warfare and presents different types of cyber weapons that are known today. The second part points out examples of the most striking recent cyber attacks and uses them as evidences to demonstrate today's importance and dissemination...

Business Case v podmínkách obchodního řízení a IT Governance

Business Case in terms of Business Management and IT Governance

Jan Juříček

Acta Informatica Pragensia 2014, 3(1), 33-43 | DOI: 10.18267/j.aip.343505  

The aim of this paper covers a definition of the issue of inadequate quality of Business Case (BC) implementaiton in a model organization. A secondary objective is the definition of BC in relation to IT Governance. Presented methodologies (such as COBIT, ValueIT, RiskIT, PMBOK, PRINCE2) are applied on investment management and financial management in the IT field. Appropriate processes and checkpoints of those methodologies are chosen to suggest the proper procedures of an audit within a model organization.

CADAQUES: Metodika pro komplexní řízení kvality dat a informací

CADAQUES: The Methodology for Complex Data and Information Management

David Pejčoch

Acta Informatica Pragensia 2014, 3(1), 44-56 | DOI: 10.18267/j.aip.355226  

The present time is characterized by an ever-increasing amount of acquired and processed data. The aim of this article is to highlight the diversity of currently used data sources, to show their specifics in terms of quality control and introduce own methodology that allows data and information quality management across these sources. The main component of this methodology is a set of basic principles and actions that can be universally applied. One of the key recommendations of this methodology is to focus on a relatively small set of data characteristics, which is relatively easy to manage. Part of the methodology is also a Data Source Maturity Model...

Retraction: [A Project Team: A Team or Just a Group?]

Kateřina Hrazdilová Bočková, Daniela Maťovčíková, Martina Polčáková

Acta Informatica Pragensia 2014, 3(1), 57-69798  

On the basis of publication ethics of the Acta Informatica Pragensia journal, the article "A Project Team: A Team or Just a Group?" has been retracted because editors of the journal found that the article had been previously published. This is a serious violation of publication ethics by the authors of the article. The publisher apologises for any inconvenience this retraction may cause.

Systémový charakter modelování možných trendů důsledků klimatických změn nástroji geografických informačních systémů

System Nature of Modelling of Possible Trends in the Effects of Climate Change through the Technology of Geographic Information Systems Tools

Veronika Vlčková

Acta Informatica Pragensia 2014, 3(1), 70-88 | DOI: 10.18267/j.aip.362875  

The basis of the entire contribution is the application of constructive theory of systems theses on a model for the prediction of the probable trend of the consequences of global climate change on vegetation zones on the territory of the Czech Republic. This model is completely designed in the technology of geographic information systems. Methodological basis, which is in detail in the first part of the contribution, is former Integrated Information System about the Territory ISU and its subsystem Ecological Databank of ISU. The prediction model, its similarly framed system characteristics are in the second part of the contribution, is based on the...

Model pre sledovanie objektu s prediktívnym riadením zdrojov streamingu v multikamerových systémoch

Object Tracking Model with Predictive Control of Streaming Sources in Multicameras Systems

Dávid Cymbalák, Miroslav Michalko, František Jakab

Acta Informatica Pragensia 2014, 3(1), 89-103 | DOI: 10.18267/j.aip.372879  

This work deals with the analysis, comparison and design of interconnection between streaming, detection and tracking technologies in the multi-camera environment. The goal is design of predictive tracking system with ability to track object in real time across multiple cameras and also with ability to stream video from one source with the best display of object. There was designed a metric for rating each source of system, which is based on current position, size or detection reliability of tracked object in the scene. It was also designed mechanisms and methods for prediction of video source rating, for prediction next streamed source and methods...

Approach to Hand Tracking and Gesture Recognition Based on Depth-Sensing Cameras and EMG Monitoring

Ondrej Kainz, František Jakab

Acta Informatica Pragensia 2014, 3(1), 104-112 | DOI: 10.18267/j.aip.3811255  

In this paper, a new approach for hand tracking and gesture recognition based on the Leap Motion device and surface electromyography (SEMG) is presented. The system is about to process the depth image information and the electrical activity produced by skeletal muscles on forearm. The purpose of such combination is enhancement in the gesture recognition rate. As a first we analyse the conventional approaches toward hand tracking and gesture recognition and present the results of various researches. Successive topic gives brief overview of depth-sensing cameras with focus on Leap motion device where we test its accuracy of fingers recognition. The vision-SEMG-based...

Simulácia PID regulátora v programovom prostredí Matlab

Simulation of PID Controller in the Programming Environment Matlab

Štefan Koprda

Acta Informatica Pragensia 2014, 3(1), 113-124 | DOI: 10.18267/j.aip.3910356  

This paper deals with the problem of modelling continuous systems. For simulate a PID controller, we used virtual environment Matlab. The goal of this article is to give information about the topic of the basic regulators PI PD simulation and PID too. Eventually, solved issues have to bring to professionals simple overview of how to simulate fundamental regulators' types in Matlab enviroment. In this paper is like a tool for modelling of dynamic systems applied Matlab. Matlab was developed by The Math Works Inc. This software has a wide application in various fields of science and technology. In the theory of automatic control is becoming even one...

Digitální demence

Digital dementia

Václav Řezníček

Acta Informatica Pragensia 2014, 3(1), 125-127 | DOI: 10.18267/j.aip.404230  

This article is review of the Manfred Spitzer's book "Digital dementia: How to make ourselves and our children fool", which was published in Czech language by Host in 2014.

Informace hypermoderní doby

Information in Hypermodern Age

Miloš Vítek

Acta Informatica Pragensia 2014, 3(1), 128-136 | DOI: 10.18267/j.aip.412426  

The paper opens the issues of the annual 45th Scientific Conference on Systems Engineering SYSIN 14: "Preliminaries to Information Systems" holds at University Pardubice, Faculty of Economics and Administration, Institute of Systems Engineering and Informatics in May 2014.