scholarly journals Teaching the scientists of tomorrow

2002 ◽  
Vol 24 (1) ◽  
pp. 40
Author(s):  
Rachel Loosley
Keyword(s):  
Real Time ◽  
Digital Video ◽  
Video Stream ◽  
The Internet ◽  
Biochemical Basis ◽  
Computer Screen ◽  
Media Player ◽  
Microsoft Windows

All three of the Society's Biochemical Basis of Biology videos are now available to view on the Internet, thanks to the Lifesign project. The project's website hosts the digital video programmes, which are fed live to the user's computer screen. Unlike downloading files (which can take absolutely ages!) the video stream is not saved onto the computer; it is sent out from the central server in real time and decoded directly at the user's computer. To view the videos you will need version 6.4 of Microsoft Windows Media Player, which can be downloaded free from the Lifesign website.

scholarly journals Real-Time Video Latency Measurement between a Robot and Its Remote Control Station: Causes and Mitigation

2018 ◽  
Vol 2018 ◽  
pp. 1-19 ◽  
Author(s):  
Admir Kaknjo ◽  
Muzaffar Rao ◽  
Edin Omerdic ◽  
Luke Robinson ◽  
Daniel Toal ◽  
...  
Keyword(s):  
Real Time ◽  
Local Area Network ◽  
Clock Synchronization ◽  
Video Stream ◽  
The Internet ◽  
Normal System ◽  
System Control ◽  
Area Network ◽  
Remotely Operated Vehicle ◽  
Ip Camera

This work presents a detailed study, characterization, and measurement of video latency in a real-time video streaming application. The target application consists of an automatic control system in the form of a control station and the mini Remotely Operated Vehicle (ROV) equipped with a camera, which is controllable over local area network (LAN) and the Internet. Control signal transmission and feedback measurements to the operator usually impose real-time constraints on the network channel. Similarly, the video stream, which is required for the normal system control and maneuvering, imposes further strict requirements on the network in terms of bandwidth and latency. Based on these requirements, controlling the system in real time through a standard Internet connection is a challenging task. The measurement of important network parameters like availability, bandwidth, and latency has become mandatory for remotely controlling the system in real time. It is necessary to establish a methodology for the measurement of video and network latency to improve the real-time controllability and safety of the system as such measurement is not possible using existing solutions due to the following reasons: insufficient accuracy, relying on the Internet resources such as generic Network Time Protocol (NTP) servers, inability to obtain one-way delay measurement, and many solutions only having support for web cameras. Here, an efficient, reliable, and cost-effective methodology for the measurement of latency of a video stream over a LAN and the Internet is proposed. A dedicated stratum-1 NTP server is used and the necessary software needed for acquiring and measuring the latency of a video stream from a generic IP camera as well as integration into the existing ROV control software was developed. Here, by using the software and dedicated clock synchronization equipment (NTP server), it was found that normal video latencies in a LAN were in the range of 488ms – 850ms, while latencies over the Internet were measured to be in the range of 558ms – 1211ms. It is important to note that the values were obtained by using a generic (off-the-shelf) IP camera and they represent the actual latencies which might be experienced during control over long range and across international territory borders.

scholarly journals Real-Time Secure/Unsecure Video Latency Measurement/Analysis with FPGA-Based Bump-in-the-Wire Security

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2984 ◽  
Author(s):  
Admir Kaknjo ◽  
Muzaffar Rao ◽  
Edin Omerdic ◽  
Thomas Newe ◽  
Daniel Toal
Keyword(s):  
Information Security ◽  
Real Time ◽  
Video Stream ◽  
Security And Privacy ◽  
The Internet ◽  
Sensitive Information ◽  
Security Issue ◽  
Remotely Operated Vehicle ◽  
Measurement Results ◽  
The Wire

With the growth of the internet of things (IoT), many challenges like information security and privacy, interoperability/standard, and regulatory and legal issues are arising. This work focused on the information security issue, which is one of the primary challenges faced by connected systems that needs to be resolved without impairing system behaviour. Information, which is made available on the Internet by the things, varies from insensitive information (e.g., readings from outdoor temperature sensors) to extremely sensitive information (e.g., video stream from a camera) and needs to be secured over the Internet. Things which utilise cameras as a source of information pertain to a subclass of the IoT called IoVT (internet of video things). This paper presents secured and unsecured video latency measurement results over the Internet for a marine ROV (remotely operated vehicle). A LabVIEW field programmable gate arrays (FPGAs)-based bump-in-the-wire (BITW) secure core is used to provide an AES (advanced encryption standard)-enabled security feature on the video stream of an IoVT node (ROV equipped with a live-feed camera). The designed LabVIEW-based software architecture provides an option to enable/disable the AES encryption for the video transmission. The latency effects of embedding encryption on the stream with real-time constraints are measured and presented. It is found that the encryption mechanism used does not greatly influence the video feedback performance of the observed IoVT node, which is critical for real-time secure video communication for ROV remote control and piloting. The video latency measurement results are taken using 128, 256 and 512 bytes block lengths of AES for both H.264 and MJPEG encoding schemes transmitted over both TCP and UDP transmission protocols. The latency measurement is performed in two scenarios (i.e., with matching equipment and different equipment on either end of the transmission).

Making Politics Palatable

2015 ◽  
Author(s):  
Diana C. Mutz
Keyword(s):  
Real Time ◽  
Digital Video ◽  
Political Attitudes ◽  
Network News ◽  
Talk Shows ◽  
The Internet ◽  
Trust In Government ◽  
Government Officials ◽  
Negative Effect

This chapter outlines the problems facing contemporary political television, regardless of whether it is experienced through network news or cable talk shows, or through a traditional television set in real time, a time-delayed recording, or as digital video over the Internet. By far the most robust negative effect on political attitudes from in-your-face politics is on trust in government and politicians. Incivility, in particular, lowers public evaluations of government and politicians. People watching uncivil repartee among political advocates come to think of politicians and government officials as unbound by the rules of civil behavior. Furthermore, when incivility is combined with up-close camera perspectives that make political advocates seem genuinely close and in their faces, viewers are apt to punish the person with whom they disagree and demonize the opposition.

scholarly journals Interconnecting Haptic Interfaces through The Internet

2018 ◽  
Author(s):  
George Kokkonis ◽  
Kostas E. Psannis ◽  
Sotirios Kontogiannis ◽  
Petros Nicopolitidis ◽  
Manos Roumeliotis ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Real Time ◽  
Video Stream ◽  
The Internet ◽  
Haptic Interfaces ◽  
Transport Protocols ◽  
Sensory Data ◽  
Delay Jitter ◽  
Packet Arrival

Supermedia streams transfer video, audio, haptic and other sensory data. Real -time transfering of supermedia streams over the Internet is quite challenging. This paper outlines the proposed protocols for transferring supermedia streams over the Internet. Moreover, it describes the Quality of Service (QoS) requirements for supermedia applications that a network has to fulfill. Extensive simulations and experiments for the performance evaluation of transport protocols for real time transferring HEVC streams with supermedia data are carried out. Complements, differences and relevancies between simulation and real world experiments are discussed. The metrics that are measured for the performance evaluation are delay, jitter, throughput, efficiency, packet loss and one proposed by the authors, packet arrival deviation. The simulation tests reveal which protocols could be used for the transfer of real-time supermedia data with a HEVC video stream.

Digitaler Video-Aktivismus: Rhetorische Strategien der Protestmobilisierung im Internet : Digital Video Activism: Rhetorical Strategies of Protest Mobilization on the Internet

SPIEL ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 95-119
Author(s):  
Kathrin Fahlenbrach
Keyword(s):  
Digital Video ◽  
Central Place ◽  
The Internet ◽  
Rhetorical Strategies ◽  
Public Protest ◽  
Online Videos ◽  
Different Types ◽  
Digital Sphere

The Internet has become a central place for protest communication: the organization of protest actions, the networking of potential activists, the dissemination of information, the calling for participation in protest actions, and the mobilization of support for protest concerns. All these and other practices have migrated from the analog to the digital sphere of publicity on the Internet. Thus the forms and strategies of public protest and activism have also changed and expanded. The article traces the special conditions of protest mobilization on the Internet. Against this background it examines different types of activist online videos with their specific audiovisual rhetorical strategies.

scholarly journals Development of a Raspberry Pi-Based Sensor System for Automated In-Field Monitoring to Support Crop Breeding Programs

Inventions ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 42
Author(s):  
Worasit Sangjan ◽  
Arron H. Carter ◽  
Michael O. Pumphrey ◽  
Vadim Jitkov ◽  
Sindhuja Sankaran
Keyword(s):  
Real Time ◽  
Imaging System ◽  
Crop Growth ◽  
Sensor System ◽  
Plant Phenotyping ◽  
Raspberry Pi ◽  
The Internet ◽  
Growth Stages ◽  
Crop Breeding ◽  
Breeding Programs

Sensor applications for plant phenotyping can advance and strengthen crop breeding programs. One of the powerful sensing options is the automated sensor system, which can be customized and applied for plant science research. The system can provide high spatial and temporal resolution data to delineate crop interaction with weather changes in a diverse environment. Such a system can be integrated with the internet to enable the internet of things (IoT)-based sensor system development for real-time crop monitoring and management. In this study, the Raspberry Pi-based sensor (imaging) system was fabricated and integrated with a microclimate sensor to evaluate crop growth in a spring wheat breeding trial for automated phenotyping applications. Such an in-field sensor system will increase the reproducibility of measurements and improve the selection efficiency by investigating dynamic crop responses as well as identifying key growth stages (e.g., heading), assisting in the development of high-performing crop varieties. In the low-cost system developed here-in, a Raspberry Pi computer and multiple cameras (RGB and multispectral) were the main components. The system was programmed to automatically capture and manage the crop image data at user-defined time points throughout the season. The acquired images were suitable for extracting quantifiable plant traits, and the images were automatically processed through a Python script (an open-source programming language) to extract vegetation indices, representing crop growth and overall health. Ongoing efforts are conducted towards integrating the sensor system for real-time data monitoring via the internet that will allow plant breeders to monitor multiple trials for timely crop management and decision making.

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