A FAST WAVELET-BASED VIDEO CODEC AND ITS APPLICATION IN AN IP VERSION 6-READY SERVERLESS VIDEOCONFERENCING SYSTEM

2004 ◽  
Vol 02 (02) ◽  
pp. 165-171 ◽  
Author(s):  
H. L. CYCON ◽  
M. PALKOW ◽  
T. C. SCHMIDT ◽  
M. WÄHLISCH ◽  
D. MARPE
Keyword(s):  
Video Conferencing ◽  
Video Codec ◽  
Global Network ◽  
Communication Framework ◽  
Coding Scheme ◽  
Frame Difference ◽  
Fast Wavelet ◽  
The One ◽  
Low Complex ◽  
Videoconferencing System

The purpose of this paper is twofold: On the one hand, we propose a fast wavelet-based video codec which is implemented into a real-time video conferencing tool. The proposed codec uses temporal frame difference coding, a computationally low-complex 5/3 tap wavelet transform, and a fast entropy coding scheme based on Golomb–Rice codes. On the other hand, we present an application of the video conferencing tool in a serverless peer-to-peer IP-based communication framework. For mobile communication we propose a simple, ready-to-use location scheme for video conference users in a global network.

scholarly journals SOCIAL NETS AS A NEW FACTOR OF SYSTEM SECURITY IN RUSSIA IN THE 21ST CENTURY

2016 ◽  
pp. 14-23
Author(s):  
S. A. Kravchenko ◽  
A. I. Podberezkin
Keyword(s):  
Social Networks ◽  
Global Network ◽  
Global Risk ◽  
Security Risks ◽  
Security Issues ◽  
Political Conflicts ◽  
Contemporary Politics ◽  
Policy Objectives ◽  
The One

The article analyzes the interconnection of social aspects of the Internet and security issues in Russia. It shows that contemporary realities acquire global network character that has ambivalent impact on the development of civilizational and social interactions. On the one hand, social networks offer new opportunities for interaction between people living in different countries, on the other hand - they can be used for exclusion at the global level which objectively produces new risks and vulnerabilities. Special consideration is given to fabrication of global risk in social networks, which may provoke military-political conflicts and even wars. In the context of growing pragmatism and globalization of activities of agents of Western civilization the networks take on the quality of the new and highly effective weapon intended to destroy and destroy high-priority policy objectives. The authors analyze the nature of contemporary politics and the war from the perspective of social networks as policy and war tools. Overcoming new security risks and vulnerabilities authors see in the ways of changing the vector of development of scientific knowledge from a pragmatic to a humanist mode.

scholarly journals Arcabouço de Comunicação Publish/Subscribe para a Coleta de Dados de Aplicações Médicas

2021 ◽  
Author(s):  
Gabriele Ribeiro ◽  
Joberto S. B. Martins
Keyword(s):  
Network Structure ◽  
Medical Data ◽  
Medical Applications ◽  
Distributed Environment ◽  
Communication Framework ◽  
Production And Consumption ◽  
Basic Set ◽  
Network Communications ◽  
The One ◽  
Health Application

Medical applications are increasingly using computing resources such as IoT sensors and network communications paradigms. An e-Health application requires a basic set of elements such as sensors, a communication framework, and a network structure adapted to the application's specific requirements. This work expands and develops a framework based on the Publish / Subscribe paradigm to develop PSIoT-Health. The PSIoT-Health framework focuses on medical applications that collect data produced in a distributed manner. The PSIoT-Health adapts the Pub/Sub model to the requirements of medical applications and proposes a solution for the production and consumption of data between producers and consumers of medical data in a distributed environment such as the one existing in a smart city.

Latvian primary school teachers’ views: Contemporary learner and future society

2016 ◽  
Vol 6 (3) ◽  
pp. 95-103
Author(s):  
Elga Drelinga ◽  
Dzintra Ilisko ◽  
Sandra Zariņa
Keyword(s):  
Primary School ◽  
Global Network ◽  
School Teachers ◽  
Group Discussions ◽  
Primary School Teachers ◽  
Second Stage ◽  
The Future ◽  
Future Society ◽  
The One ◽  
Watching Tv

The paper presents a study of focus groups conducted in schools of Latvia involving teachers of grades 1 – 6 (n=76). The first stage of research presents the analyses of teachers’ discussion what a contemporary learner is like, while at the second stage of the study focuses on finding of what the future society will be like when the present-day primary school learners have left the school, what teachers must change in their work  in  the process of learning to meet the needs of the future.The data and outcomes of  this study are based on the outcomes of focus group discussions and the analysis of the experience in other papers. According to the acquired outcomes of the study, contemporary learners on the one hand are braver, ready for an active action, they use various opportunities, they are aware of their worth, on the other hand, they accept diversity, spend much time watching TV, using the global network, that does not facilitate social communication. Conclusion: For the process of learning to meet the needs of the future, learners must be given an opportunity to construct such knowledge, skills, and attitudes that make it possible to view processes holistically, grasping the mutual interaction of different aspects. 

scholarly journals Mediateka Babel. YouTube jako temat, rama formalna i platforma sztuki

2020 ◽  
Vol 31 (1) ◽  
pp. 171-189
Author(s):  
Ewa Wójtowicz
Keyword(s):  
20Th Century ◽  
Cultural Production ◽  
Global Network ◽  
Digital Culture ◽  
Avant Garde ◽  
Moving Images ◽  
Meta Level ◽  
Formal Framework ◽  
Dziga Vertov ◽  
The One

The text focuses on the specific features of the so-called 'cinematic turn' within the scope of visual culture emergent within the YouTube platform, particularly during its first, formative years. This turn takes place on the meta-level of the existing circulation of content enabled by YouTube, often being an autothematic reflection on this tool of cultural production. The vernacular aesthetics, a specific formal framework and a particular modus operandi of YouTube became the subject of artistic statements, sometimes in a form of subversive remix. Therefore I think of YouTube as a realm of art because of its meta-media practice that made the cinematic turn visible. It does not rely on straightforwardly understood production of (moving) images, but  postproduction, as understood by Nicolas Bourriaud. Moreover, the cinematic turn taking place within YouTube is different from the one practised by the avant-garde of 20th century, due its being not “seeing” or “writing” (as Dziga Vertov understood montage) but rather “overwriting”, to use language more adequate to the described sphere of digital culture. Artists use YouTube as an open library, working with its resources, applying techniques such as postproduction, remix, re-contextualisation and appropriation. Therefore it becomes a multimedia library, a “Mediateca Babel” of a kind, to recall J. L. Borges' idea. The examples mentioned in the text are of a postproductional nature, such as to-camera-performance and subversive “overwriting” of contents enabled with the circulationism typical for social media. Equally important are the strategies of recognising the cultural framework of YouTube, in the context of 20th-century media art history, as well as the platform’s interface. Also, there is the issue of relations between vernacular creativity and the art system because of “capturing” the amateur-generated content and transferring it to mainstream artworld. These examples let me argue that the cinematic turn is a form of postproduction, which enables the hidden mechanisms behind the circulation of moving images in the overloaded global network. The cinematic turn in the context of YouTube does not mean that cinema and its language are at home within this platform. Also, the meta-artistic way of “making” platform art does not turn YouTube into “art platform” (as understood by Olga Goriunova). Nevertheless, platform art may happen in this context as a result of working with the cinematic turn in its vernacular aspect, which makes it possible to reveal its key features and move them to the meta-level.

scholarly journals DIGITAL TRANSFORMATION OF SOCIETY: BUSINESS MANAGEMENT BY HUMAN POTENTIAL DEVELOPMENT

2021 ◽  
Author(s):  
Stepan Lebedev ◽  
Keyword(s):  
Business Management ◽  
Global Network ◽  
Human Potential ◽  
Learning Theories ◽  
Business Training ◽  
Dual Nature ◽  
Potential Development ◽  
Potential Formation ◽  
E Learning ◽  
The One

The article examines educational technologies that are used for the formation and development of human potential with the aim of improving business management in modern conditions. The dual nature of learning as a system was taken into account. On the one hand, the growth of human potential determines the development of business. On the other hand, providing quality educational services is a business in itself. In the light of the concept of “LifeLong Learning”, the analysis of the correlation between learning theories and technologies at such stages of human potential formation as Preparatory & Secondary School – Higher Education – Business Training was carried out. Particular attention was paid to the study of the role of digitalization in modern realities. The global network readiness NRI was considered as indicators of the level of digitalization of various countries. A comparative analysis of the level of development of digital technologies and its application in the education system at all stages of learning is carried out. These data were compared with the success of the economies of various countries as a consequence of the level of human potential development. Particular attention was paid to the issues of distance learning as a way to ensure the availability of education that is, the implementation of the “Education for All” policy. Examples of the use of various e-learning systems for online and offline training in the context of the COVID-19 pandemic are given.

scholarly journals A Nation Connected

2021 ◽  
pp. 199-242
Author(s):  
Jean-Michel Johnston
Keyword(s):  
Urban Landscape ◽  
Local Level ◽  
Global Network ◽  
Theodor Fontane ◽  
German Nation ◽  
Nature Of Information ◽  
Otto Von Bismarck ◽  
The One ◽  
The Right ◽  
The Cost

This chapter opens with an illustration of the Prussian government’s use of telegraph networks to unite the German nation during the war with France in 1870 by ensuring the timely and ubiquitous distribution of news. Otto von Bismarck and Generalpostmeister Heinrich Stephan then sought to build upon this unifying conception of telegraphic communication by improving and homogenizing the new Kaiserreich’s network, but they soon faced obstacles from within and outside the state. On the one hand, the federal structure of the new empire granted Bavaria and Württemberg the right to manage their own networks. On the other hand, the increasingly global network upon which trade and finance depended, and the news cartel established between Havas, Reuters, and Wolffs Telegraphisches Büro limited the imperial administration’s ability to manage the cost and nature of information circulating on its lines. These issues, and particularly the economic crisis of 1873, led to conflicts in the Reichstag, where deputies openly questioned the technology’s capacity to ‘annihilate space’ and formed alliances based upon the sections of society which they believed should or should not possess an advantage in communication. At a local level, meanwhile, government efforts to build new, more imposing, post and telegraph buildings alongside subsidiary offices threatened the business community’s privileged position within the urban landscape. The distance and time involved in the transmission of telegrams came to define one’s local and social status—as shown vividly in the novels of Theodor Fontane in the early 1880s and in the popular press.

scholarly journals Comparative assessment of TROPOMI and OMI formaldehyde observations against MAX-DOAS network column measurements

2021 ◽  
Author(s):  
Isabelle De Smedt ◽  
Gaia Pinardi ◽  
Corinne Vigouroux ◽  
Steven Compernolle ◽  
Alkis Bais ◽  
...  
Keyword(s):  
Horizontal Resolution ◽  
Global Network ◽  
Positive Bias ◽  
Temporal Scales ◽  
Tropical Regions ◽  
Spatial And Temporal Scales ◽  
Satellite Sensors ◽  
The Indian Ocean ◽  
The One ◽  
Combined Time Series

Abstract. The TROPOspheric Monitoring Instrument (TROPOMI), launched in October 2017 on board the Sentinel-5 Precursor (S5P) satellite, monitors the composition of the Earth's atmosphere at an unprecedented horizontal resolution as fine as 3.5 × 5.5 km2. This paper assess the performances of the TROPOMI formaldehyde (HCHO) operational product compared to its predecessor, the OMI HCHO QA4ECV product, at different spatial and temporal scales. The parallel development of the two algorithms favored the consistency of the products, which facilitates the production of long-term combined time series. The main difference between the two satellite products is related to the use of different cloud algorithms, leading to a positive bias of OMI compared to TROPOMI of up to 30 % in Tropical regions. We show that after switching off the explicit correction for cloud effects, the two datasets come into an excellent agreement. For medium to large HCHO vertical columns (larger than 5 × 1015 molec.cm−2) the median bias between OMI and TROPOMI HCHO columns is not larger than 10 % (< 0.4 × 1015 molec.cm−2). For lower columns, OMI observations present a remaining positive bias of about 20 % (< 0.8 × 1015 molec.cm−2) compared to TROPOMI in mid-latitude regions. Here, we also use a global network of 18 MAX-DOAS instruments to validate both satellite sensors for a large range of HCHO columns. This work complements the study by Vigouroux et al. (2020) where a global FTIR network is used to validate the TROPOMI HCHO operational product. Consistent with the FTIR validation study, we find that for elevated HCHO columns, TROPOMI data are systematically low (−25 % for HCHO columns larger than 8 × 1015 molec.cm−2), while no significant bias is found for medium range column values. We further show that OMI and TROPOMI data present equivalent biases for large HCHO levels. However, TROPOMI significantly improves the precision of the HCHO observations at short temporal scales, and for low HCHO columns. We show that compared to OMI, the precision of the TROPOMI HCHO columns is improved by 25 % for individual pixels, and up to a factor 3 when considering daily averages in 20 km-radius circles. The validation precision obtained with daily TROPOMI observations is comparable to the one obtained with monthly OMI observations. To illustrate the improved performances of TROPOMI in capturing weak HCHO signals, we present clear detection of HCHO column enhancements related to shipping emissions in the Indian Ocean. This is achieved by averaging data over a much shorter period (3 months) than required with previous sensors, and opens new perspectives to study shipping emissions of VOCs and related atmospheric chemical interactions.

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