Design of hybrid cable remote power supply circuits with a coaxial element for collecting and processing information based on video surveillance systems

2021 ◽  
pp. 102-117
Author(s):  
А.Б. Семенов ◽  
К.Д. Буробина ◽  
С.А. Орлова
Keyword(s):  
Video Surveillance ◽  
Supply Voltage ◽  
Computer Control ◽  
Channel Length ◽  
Coaxial Cable ◽  
Surveillance Systems ◽  
Cross Sectional ◽  
Twisted Pair ◽  
Cable Channel ◽  
Processing Information

Обоснована перспективность применения компьютерных систем управления с централизованной структурой. На примере системы видеонаблюдения показаны возможности коаксиальных, витопарных и волоконно-оптических кабелей при построении физического уровня подобных систем. Определено место коаксиального кабеля при реализации таких структур. Рассмотрены возможности комбинированных конструкций из коаксиальной трубки и дополнительных жил питания при подключении удаленной терминального сетевого компьютерного оборудования с коаксиальным интерфейсом. Предложен метод расчета площади поперечного сечения выделенных жил питания для такого кабеля, определены их конкретные значения в зависимости от требуемого расстояния и мощности потребления терминального оборудования. Продемонстрирована целесообразность применения повышенного напряжения питания для систем уличного исполнения при протяженности тракта свыше 300 м. The prospects of using computer control systems with a centralized structure are substantiated. The possibilities of coaxial, twisted-pair and fiber-optic cables for building the physical level of modern video surveillance systems are shown. The place of the coaxial cable in the implementation of such systems is determined. The possibilities of combined structures made of a coaxial tube and additional power wires when connecting a remote TV camera are considered. A method is proposed for calculating the cross-sectional area of the separated power wires for such a cable, and their specific values are determined depending on the required distance and power consumption of the TV camera. The expediency of using increased supply voltage for street systems with a cable channel length of more than 300 m is demonstrated.

Awareness of symptomatic differences Covid-19, SARS, Swine Flu, Common cold among dental students

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 1026-1033
Author(s):  
Nivedha Valliammai Mahalingam ◽  
Abilasha R ◽  
Kavitha S
Keyword(s):  
Infectious Diseases ◽  
Undergraduate Students ◽  
Common Cold ◽  
Emerging Infectious Diseases ◽  
Dental Students ◽  
Swine Flu ◽  
Viral Diseases ◽  
Surveillance Systems ◽  
Cross Sectional ◽  
The Impact

Enormous successes have been obtained against the control of major epidemic diseases, such as SARS, MERS, Ebola, Swine Flu in the past. Dynamic interplay of biological, socio-cultural and ecological factors, together with novel aspects of human-animal interphase, pose additional challenges with respect to the emergence of infectious diseases. The important challenges faced in the control and prevention of emerging and re-emerging infectious diseases range from understanding the impact of factors that are necessary for the emergence, to development of strengthened surveillance systems that can mitigate human suffering and death. The aim of the current study is to assess the awareness of symptomatic differences between viral diseases like COVID-19, SARS, Swine flu and common cold among dental students that support the prevention of emergence or re-emergence. Cross-sectional type of study conducted among the undergraduate students comprising 100 Subjects. A questionnaire comprising 15 questions in total were framed, and responses were collected in Google forms in SPSS Software statistical analysis. The study has concluded that dental students have an awareness of the symptomatic differences between infectious viral disease. The study concluded that the awareness of symptomatic differences between viral diseases like COVID-19, SARS, Swine flu, Common cold is good among the dental students who would pave the way for early diagnosis and avoid spreading of such diseases. A further awareness can be created by regular webinars, seminars and brainstorming sessions among these healthcare professionals.

scholarly journals Secure Video Surveillance Framework in Smart City

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4419
Author(s):  
Hao Li ◽  
Tianhao Xiezhang ◽  
Cheng Yang ◽  
Lianbing Deng ◽  
Peng Yi
Keyword(s):  
Video Surveillance ◽  
Smart City ◽  
Key Management ◽  
Surveillance System ◽  
Chinese Remainder Theorem ◽  
Smart Cities ◽  
Group Key Management ◽  
Video Surveillance System ◽  
Surveillance Systems ◽  
Key Update

In the construction process of smart cities, more and more video surveillance systems have been deployed for traffic, office buildings, shopping malls, and families. Thus, the security of video surveillance systems has attracted more attention. At present, many researchers focus on how to select the region of interest (RoI) accurately and then realize privacy protection in videos by selective encryption. However, relatively few researchers focus on building a security framework by analyzing the security of a video surveillance system from the system and data life cycle. By analyzing the surveillance video protection and the attack surface of a video surveillance system in a smart city, we constructed a secure surveillance framework in this manuscript. In the secure framework, a secure video surveillance model is proposed, and a secure authentication protocol that can resist man-in-the-middle attacks (MITM) and replay attacks is implemented. For the management of the video encryption key, we introduced the Chinese remainder theorem (CRT) on the basis of group key management to provide an efficient and secure key update. In addition, we built a decryption suite based on transparent encryption to ensure the security of the decryption environment. The security analysis proved that our system can guarantee the forward and backward security of the key update. In the experiment environment, the average decryption speed of our system can reach 91.47 Mb/s, which can meet the real-time requirement of practical applications.

Usefulness of seroconversion rates for comparing infection pressures between countries

2010 ◽  
Vol 139 (4) ◽  
pp. 636-643 ◽  
Author(s):  
J. SIMONSEN ◽  
P. TEUNIS ◽  
W. VAN PELT ◽  
Y. VAN DUYNHOVEN ◽  
K. A. KROGFELT ◽  
...  
Keyword(s):  
Bayesian Method ◽  
Healthy Population ◽  
Surveillance Systems ◽  
National Surveillance ◽  
Serum Samples ◽  
Cross Sectional ◽  
Infection Pressure ◽  
Control Programmes ◽  
True Infection ◽  
Rate Ratios

SUMMARYSalmonella is a frequent cause of foodborne illness. However, since most symptomatic cases are not diagnosed, the true infection pressure is unknown. Furthermore, national surveillance systems have different sensitivities that limit inter-country comparisons. We have used recently developed methods for translating measurements of Salmonella antibodies into estimates of seroincidence: the frequency of infections including asymptomatic cases. This methodology was applied to cross-sectional collections of serum samples obtained from the general healthy population in three European countries. Denmark and The Netherlands had the lowest seroincidence (84169 infections/1000 person-years), whereas Poland had the highest seroincidence (547/1000 person-years). A Bayesian method for obtaining incidence rate ratios was developed; this showed a 6·3 (95% credibility interval 3·3–12·5) higher incidence in Poland than in Denmark which demonstrates that this methodology has a wider applicability for studies of surveillance systems and evaluation of control programmes.

scholarly journals Is over-reporting a problem in mandatory communicable disease reporting? The taiwanese experience on Enterovirus 71

2014 ◽  
Vol 8 (10) ◽  
pp. 1294-1300
Author(s):  
Tseng Chu-Chun ◽  
Yang Che-Ming
Keyword(s):  
Communicable Disease ◽  
Enterovirus 71 ◽  
Surveillance Systems ◽  
Accuracy Rate ◽  
Cross Sectional ◽  
Systems Methodology ◽  
Disease Reporting ◽  
Enteroviral Infection ◽  
District Hospitals ◽  
The Government

Introduction: In Taiwan, severe enteroviral infections must be reported to the government within 24 hours to ensure that severe enterovirus 71 (EV71) infections can be detected early. The objective of this research was to ascertain whether over-reporting is a problem in mandatory disease-reporting systems. Methodology: A multiyear cross-sectional study methodology was applied based on secondary data analyses. Data from the national notifiable communicable disease surveillance system of Taiwan Centers for Disease Control were analyzed to assess the trends and factors influencing reporting accuracy. Results: From July 1999 to December 2008, 2,611 cases of severe enteroviral infection were reported in Taiwan. Among these cases, 1,516 were confirmed to be EV71 cases, and the remaining 1,095 were confirmed to be non-EV71 infections. The overall accuracy rate was 58%. The accuracy rate was 60%–70% higher during epidemics (2000–2002, 2005, and 2008) and high seasons than it was in other seasons. The accuracy rate was highest among medical centers and lowest among district hospitals. Conclusions: The results indicated that reports are more accurate during high seasons and peak years than during other periods. This might be attributable to the adequate level of specific educational programs for professionals when more cases occur, which could facilitate identification. Based on experiences in Taiwan, optimal training can ensure that surveillance systems are not inundated by false-positive reports.

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