scholarly journals EXPERIMENTAL DETERMINATION OF OPTIMAL PARAMETERS OF MOBILE TELECONFERENCES

2021 ◽  
Vol 2 (14) ◽  
pp. 68-86
Author(s):  
Andrii Byts ◽  
Volodymyr Sokolov ◽  
Nataliia Mazur ◽  
Valerii Kozachok ◽  
Anatoly Bessalov
Keyword(s):  
White Noise ◽  
Video Transmission ◽  
Video Stream ◽  
Video Playback ◽  
Corporate Networks ◽  
Video Information ◽  
The Moment ◽  
Very High

The article considers the problem of ensuring the availability and integrity of wireless subscribers in cellular and other wireless corporate networks. The article aims to determine the threshold values for the moment of failure of video transmission, quantitative parameters, artifacts, and the number of errors for the image. Show the dependence of the integrity of data transmitted in real-time on the characteristics of the environment. Two approaches were used to assess the quality of video information: qualitative (image recognition assessment) and quantitative (error measurement). Because the research program was written in the Kotlin programming language, a library written in Java or Kotlin was required. After searching the library, it turned out that only three libraries meet such parameters as reliability, relevance, and availability of documentation: Jaffree, Xuggler, and VLCJ. After gathering information, it was found that the most common screen extensions for desktops are 1366 × 768 and for phones—360 × 640. An error occurred that RTP did not support more than one connection. Also, the RTSP protocol could not pass the experiment on codecs other than MP4V. The experiment stopped earlier than necessary without error. Judging by the indicators, this was a very high CPU load. All other protocols were successfully tested, and results were obtained. During the experiments, we encountered various video anomalies. The worst was the video playback problem with the MJPG codec. Other anomalies were also identified: frame delay, incorrect frame rendering, white noise, and white noise mixed with frames. It is clear how up to 128 kbps experiments are successful and then begin to stop the video stream without error information. According to the results of experiments, the H.264 codec performs best.

scholarly journals relationship between circadian rhythm and severity of psoriasis and obesity

2021 ◽  
Vol 27 (1-2) ◽  
pp. 22-29
Author(s):  
Ya.O. Yemchenko ◽  
◽  
K.Ye. Ischeikin ◽  
I.P. Kaidashev ◽  
O.V. Bezeha ◽  
...  
Keyword(s):  
Circadian Rhythm ◽  
Weight Gain ◽  
Negative Correlation ◽  
Negative Impact ◽  
Working Capacity ◽  
High Negative Correlation ◽  
Disease Impact ◽  
Very High

The research aim is to identify the correlation between circadian rhythm in terms of changes in the chronotype of human working capacity and severity of psoriasis progression, obesity, and the disease impact on the quality of patients' life. Materials and Methods. The research focuses on the determination of the PASI, BMI, DIAG indexes and a patient's chronotype of working capacity. Results and Discussion. The results of the correlation analysis showed a very high negative correlation between chronotype of patients' working capacity and BMI. They also demonstrated a high negative correlation between PASI and DIAG indicators and chronotype of patients' working capacity. Conclusions. The circadian rhythm changes to the evening chronotype of human working capacity contribute to psoriasis worsening, weight gain, and negative impact of the disease on the quality of patients' life.

Costi di produzione ed erogazione di acqua potabile. Una proposta di analisi dell'efficienza

2009 ◽  
pp. 79-116
Author(s):  
Gianni Bianco ◽  
Pierluigi Cecati
Keyword(s):  
Budget Deficit ◽  
Basic Problem ◽  
Scale Economies ◽  
Administrative Monopoly ◽  
Minimal Dimension ◽  
National Characteristics ◽  
Drinkable Water ◽  
The Moment

- Water will be a basic problem in the future of the world. At the moment in Italy the main problem lies in water reserve reductions facing a growing demand, while for drinkable water more and more administrator authorities are facing a budget deficit. The causes of this national and local situation are the administrative monopoly and the absence of planning and coordination policies, that would rationalize water use without rationing it, starting from an awareness of the costs of different involved variables. The economic quality of spring and consumption water, the oldness of the waterworks and pipe networks, the extreme fragmentation of waterworks (often of minimal dimension), their territorial localisation, the absence of a common method of charges, the scanty use of analysis of management, are some of the causes of a unique and surprising variability of costs, proceeds and tariffs. This paper analyzes the generation and the structure of the costs of drinkable water in an area representative of many national characteristics on the environmental, physic and socio-economic level. The quest for more efficient forms of management and for a more transparent determination of the tariffs has been carried on through the use of custom indexes of productivity and of production. These indexes summarise the existence of scale economies, of pipe network related diseconomies, and of economies of localisation and density of the consumers. The paper presents a synthesis of the observations gathered from about two hundred waterworks subdivided by owner and entrepreneurial typologies

scholarly journals CARDIOVASCULAR DRUG INTERACTION;

2013 ◽  
Vol 20 (05) ◽  
pp. 672-677
Author(s):  
HINA REHMAN, ◽  
AMMAR HUSSAIN,
Keyword(s):  
Drug Interaction ◽  
Urban Areas ◽  
Cardiovascular Drug ◽  
Sectional Study ◽  
Huge Number ◽  
Prescribing Practice ◽  
The City ◽  
Very High

Introduction: Cardiovascular drug interaction is the alarming and becoming leading cause of death in the society ofKarachi Pakistan where the prevalence rate of CVS diseases in urban areas is very high. Objective: The aim was to evaluate thecardiovascular interactions in poly prescription in the city of Karachi, Pakistan. Study Design: The methodology adopted for this study iscross sectional study. Material & Methods: In which verbally and signed informed consent prepare which help to limitize the biasness.Results: In this study the determination of the percentage of interactions is about 30%.The gender which is most susceptible forinteraction is females. The Significance or consequences of interaction would measured by minor, moderate and major level. In our studyminor is about 28, moderate is about19 while Major is about 9.The most untoward effects which was seen was bradycardia and the classof drug which lead for interaction is Beat and ACE blockers in the prescribing practice and some severe interaction lead to life threatening.Conclusion: The main result which is concluding for this study is the huge number of interaction which is found in the prescription createslife threatening circumstances. With the proper consultation and time we can minimize the interaction as well as the health scenario canbe improved and the quality of life can be improved.

scholarly journals Ketaatan Muslim Indonesia terhadap Penetapan Hari Raya antara Itsbat Pemerintah dan Ikhbar Ormas Islam

2019 ◽  
Vol 6 (2) ◽  
pp. 127-141
Author(s):  
Nihayatur Rohmah
Keyword(s):  
Religious Beliefs ◽  
Control Function ◽  
Muslim Community ◽  
Social Organizations ◽  
Intrinsic Values ◽  
Strict Control ◽  
The Government ◽  
Very High

The issue of “hisab rukyat” in terms of determining the beginning of the Islamic month often makes a difference. Government efforts through itsbat trial basically are based on efforts to achieve uniformity, benefit and unity of Indonesian Muslims. But in the level of reality, it turns out that each party (read; religio social organizations) issued its own decision. Religion has an influence as a motivation in encouraging individuals to carry out an activity, because actions carried out against the background of religious beliefs are considered to have an element of purity and obedience. This connection will influence someone to do something. Then came the Islamic groups who wanted to compromise with the government and Islamic groups who continued to fight outside the system with the wider community. Regulations are less effective if the degree of compliance only revolves around compliance (obeying for fear of being sanctioned) or identification (obeying only because of fear of good relations with someone being damaged). Conversely, if the degree of compliance reaches internalization (obedience to a rule because he truly feels that the rule is material and his spirit is in accordance with the intrinsic values ??adopted), it means the quality of the effectiveness of the regulation is very high, so the system runs according to the rules existing without stressing the strict control function. Of the three motives of obedience it is very likely to be the basis for consideration of the Muslim community in Indonesia to prefer to compromise with the government or mass organizations in terms of the determination of the holiday.

scholarly journals Seamless Video Session Handoff between WLANs

2010 ◽  
Vol 2010 ◽  
pp. 1-7
Author(s):  
Claudio de Castro Monteiro ◽  
Paulo Roberto de Lira Gondim ◽  
Vinícius de Miranda Rios
Keyword(s):  
Wireless Lan ◽  
Video Transmission ◽  
Mobile Ip ◽  
Video On Demand ◽  
Frame Rate ◽  
Access Points ◽  
Streaming Applications ◽  
The Moment ◽  
Loss Frame

Handoff in a distributed IEEE 802.11 Wireless LAN network is a source of significant amount of problems on the video transmission environment. The visual quality of video streaming applications is lowered when stations are in handoff status. In this paper, we introduce an architecture of a session proxy (SP), which tries to preserve the quality of the streaming video upon each handoff between access points. We have evaluated thresholds of RSSI and Loss Frame Rate (LFR) for deciding the moment when the handoff process shall begin. Our solution performance was evaluated in a testbed implementation for MPEG-4 video on demand with one video server (VLS) and two FreeBSD-based access points supporting Mobile IP, DHCP Server and IAPP approach.

scholarly journals IMPROVEMENT OF METHODS OF MOTION COMPENSATION OF DYNAMIC OBJECTS MOVING IN VIDEO STREAM OF THE VIDEOCONFERENCING SYSTEM

2018 ◽  
Vol 8 (4) ◽  
pp. 48-51
Author(s):  
Volodymyr Barannik ◽  
Mykola Dvorsky ◽  
Valeriy Barannik ◽  
Viktoria Himenko ◽  
Anton Sorokun
Keyword(s):  
Quality Control ◽  
Motion Compensation ◽  
Information Exchange ◽  
Video Stream ◽  
Video Data ◽  
Video Information ◽  
Objective Control ◽  
Operational Activities ◽  
Videoconferencing System

Videoconferencing gives us the opportunity to work and communicate in real time, as well as to use collective applications, interactive information exchange. Videoconferencing systems are one of the basic components of the organization of manegment, ensuring, the timeliness and necessary quality management of the implementation of objective control over the solution of the tasks. The quality of the image and the time of transmission of video information is unsatisfactory for the quality control of the troops. Considered ways to increase the efficiency of management and operational activities, due to methods of compensation of motion, using technology to reduce the volume of video data for quality improvement.

scholarly journals METHOD OF EFFICIENT REPRESENTATION AND PROTECTION OF DYNAMIC OBJECTS IN VIDEO POTOTICS BASED ON THE TECHNOLOGY OF THEIR ROCKUM COMPENSATION

2018 ◽  
pp. 90-97
Author(s):  
Volodymyr V. Barannik ◽  
Mykola V. Dvorsky ◽  
Valeriy V. Barannik ◽  
Anton D. Sorokun
Keyword(s):  
Video Streaming ◽  
Motion Compensation ◽  
Processing Time ◽  
Video Stream ◽  
Video Data ◽  
Frame Rate ◽  
Video Information ◽  
Operational Activities ◽  
The One

Recently, special attention at implementation of the necessary level of information security is given to wireless technologies. Their use contributes to the growing demand for video information services. This is accompanied by an increase in the intensity of video streams and an increase in the processing time of video information, resulting in them far beyond the bandwidth of networks. Consequently, there is a contradiction that is caused: on the one hand, the growth of requirements for the quality of video information; on the other hand, difficulties in providing services of the given quality using wireless technologies.The article deals with issues related to the speed of the video stream of video information, depending on the quality of video data required, from spatial resolution and frame rate. The article concludes that with the trend of increasing the amount of video information in the complexes of the Hellenic Republic - it is necessary to improve the coding methods. In order to increase the efficiency of management and operational activities, it is proposed to improve the existing methods of encoding dynamic video streaming object with algorithms for motion compensation for video conferencing in the system of troop control. As a result, the article proposes a six-point algorithm for search, which can increase the efficiency and reduce the processing time of video information between subscribers. This approach, in the future, by improving the existing methods for encoding dynamic video streaming objects with algorithms of motion compensation, will improve the efficiency of using videoconferencing, for example, in the control system of troops.

scholarly journals DETERMINATION OF THE DYNAMIC TORQUE OF THE RESISTANCE OF THE DRIVE SHAFT OF THE REPLACING MACHINE FORMED BY THE MOVEMENT OF THE BULK ENVIRONMENT IN THE WORK TANK

2021 ◽  
Vol 297 (3) ◽  
pp. 94-99
Author(s):  
Mark ZALYUBOVSKYI ◽  
◽  
Viktor MALYSHEV ◽  
Igor PANASYUK ◽  
◽  
...  
Keyword(s):  
Machine Building ◽  
Drive Shaft ◽  
Dynamic Component ◽  
Sharp Edges ◽  
The Moment ◽  
Definition Of ◽  
Moment Of Resistance ◽  
Working Tank

Galvanizing technological operations include the processes of cleaning the surfaces of parts from burrs, burrs, bumps and scale, corrosion products, rounding of sharp edges, separation of parts from castings, as well as processes to improve the quality of product surfaces: grinding or polishing. These technological operations are implemented using different types of equipment: vibrating, rotary and spindle machines, rotating drums, etc. The most promising are considered to be machines with complex spatial movement of working tanks. Analytical researches of definition of dynamic moment of resistance of a driving shaft of the shredding machine on the basis of laws of movement of loose mass in the middle of working capacity are carried out. The positions of the moving parts of the machine and the bulk array in the middle of the tank, which correspond to the maximum dynamic component of the moment of resistance on the drive shaft created by the bulk array loaded to the working tank. An expression is obtained to calculate the value of the dynamic component of the moment of resistance on the drive shaft of the machine, created by the bulk array loaded to the working tank. The obtained research results can be used by the relevant machine-building enterprises at the stage of designing galvanizing types of equipment with tanks performing complex spatial motion.

scholarly journals Grade of Service (GoS) Analysis on PT XYZ Using SolarWinds Orion

2019 ◽  
Author(s):  
Novrizen
Keyword(s):  
Service Quality ◽  
Network Traffic ◽  
Service Level ◽  
Network Efficiency ◽  
Grade Of Service ◽  
Good State ◽  
Internal Network ◽  
The Moment ◽  
Very High

PT XYZ offered very high availability of network connections (Service Level Agreements or SLA) to customer requirements. The immense SLA offered by the company must be supported with good service quality of the internal network and proper maintenance scheduling. One of the parameters that can be used to measure internal network quality is Grade of Service (GoS). However, there’s never been any analysis done on PT XYZ's internal network using this parameter so the quality of internal services not yet determined. In this study, Grade of Services (GoS) analysis was conducted on PT XYZ’s internal network to find out whether the service quality of the internal network was in a good category based on the GoS value parameter. The analysis is carried out by utilizing the bandwidth usage data samples taken from one of the main nodes monitored by SolarWinds Orion. The bandwidth usage rate was analyzed in the period of days, weeks, and months to calculate network traffic volume so that the highest network traffic intensity trend and Grade of Service (GoS) value at the busiest hour can be determined. After 6 months of data collection, the intensity of network traffic at the busiest hour was obtained at 18.70 Erlang with a GoS value of 0.0000000001778%. The GoS value shows that that service quality is in a very good state (below < 1%) so network efficiency improvements not necessary at the moment.

A Novel Video Stream Transmission Control Algorithm

2012 ◽  
Vol 268-270 ◽  
pp. 1814-1817
Author(s):  
Ming Wei Wang ◽  
Jian Zhong Lin ◽  
Xin Xie ◽  
Qi Wang
Keyword(s):  
Queue Length ◽  
Control Algorithm ◽  
Video Transmission ◽  
Video Stream ◽  
Video Frame ◽  
Transmission Control ◽  
Transmission Quality ◽  
Simulation Results ◽  
Video Transmission Quality

Video stream codec and transmission control algorithm is very important to improve quality of service of video on Internet. A priority video transmission algorithm based on queue-length(VTA-QL) is proposed. Different kind of video frame is marked with different priority and is scheduled according to its priority. Simulation results show that the proposed algorithm VTA-QL can improve the video transmission quality greatly, and that link bandwidth, delay and queue length have much effect on video transmission quality.

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