Search results for "Video"
showing 10 items of 1348 documents
Bezkontakta fotopletizmogrāfijas metode ādas asinsrites monitoringam dažādu dziļumu gultnēs
2018
Darba mērķis ir izpētīt vai bezkontakta fotopletizmogrāfijas (bPPG) metode ir kvalitatīva metode cilvēka asinsrites monitoringam. Darbā tika pētīts, kā mainās plaukstas asinsrite dažādu fizioloģisko provokāciju ietekmē, izmantojot bPPG metodi, dažādu plaukstas dziļumu gultnēs. Darbs tika veikts izmantojot iekārtu, kas sastāv no divu dažādu spektra diapazonu apgaismotājiem (530 nm un 810 nm) un videokameras. Ar iekārtas palīdzību tika uzņemti video ar plaukstu, no kura tika iegūti fotopletizmogrāfiskie signāli un to amplitūdas dinamika. Ar bPPG metodi tika reģistrētas plaukstas asins apjoma pulsāciju amplitūdas izmaiņa sildīšanas, dzesēšanas, oklūzijas un sildošās smēres ietekmē. Rezultāti p…
Smart camera design for intensive embedded computing
2005
Computer-assisted vision plays an important role in our society, in various fields such as personal and goods safety, industrial production, telecommunications, robotics, etc. However, technical developments are still rare and slowed down by various factors linked to sensor cost, lack of system flexibility, difficulty of rapidly developing complex and robust applications, and lack of interaction among these systems themselves, or with their environment. This paper describes our proposal for a smart camera with real-time video processing capabilities. A CMOS sensor, processor and, reconfigurable unit associated in the same chip will allow scalability, flexibility, and high performance.
Blockchain for Smart Cities: Applications for IoT and Video Surveillance Systems
2020
The recent revolution of the Internet of Things introduces new engaging operat- ing scenarios. The IoT paradigm enables the intertwined use of physical and soft- ware components through the interconnection of devices that exchange data with each other without direct human interaction in several fields, especially in industrial and home environments. In the framework of the Italian-Vietnamese cooperation on the topics of smart cities and Blockchain, we present two applications of the blockchain technology, which can be applied, respectively in indoor, for monitoring and controlling smart homes, and in outdoor, for visual monitoring through video surveillance systems. In both cases, we propos…
Video sharing application for educational use: Usability and impacts of participation modes
2014
For the past few years, the use of video lectures in universities has been on the increase. Production of video lectures will bring flexibility that is needed for study and enable the utilization of pedagogical solutions based on new videos. On the other hand, applications for the sharing and use of lecture videos clearly designed for educational requirements are not available. This article introduces an application for the sharing and use of videos. The application was designed and implemented for educational purposes, and it has been in use already for two years. The article examines, with the help of a SUS survey, students' and lecturer's satisfaction with the application and its usabili…
The crowd against the few: Measuring the impact of expert recommendations
2020
Abstract A large amount of research on recommender systems has focused on improving the accuracy of suggestions in offline settings. However, this focus and the commonly used techniques can lead to a “filter bubble”, severely limiting the diversity of content discovered by users. Several offline studies show that this can be mitigated by using experts for recommendation. In contrast to standard recommender systems, experts are able to generate more diverse recommendations and increase the novelty of given suggestions. They can be used in missing-data or cold-start scenarios and reduce noise in the users' ratings. This paper examines the impact of employed experts' recommendations on user be…
The Role of Log Entries in the Quality Control of Video Distribution
2012
Diversification of university teaching with the help of video lectures has become much more common during the past few years. Once videos have become an essential part of teaching arrangements, whoever organizes the teaching must also pay attention to factors related to videos in quality system work for teaching. In the video production process it is the factors related to video transmission that exert influence on the usability of videos and set limitations for their production. A lot of information about those factors can be obtained from the media server log files. The particular focus of this paper is on the functionality of the connection between a server and a client and its effect on…
A validated search filter for the identification of endocrine disruptors based on the ECHA/EFSA guidance recommendations.
2020
Abstract A guidance document for the identification of endocrine disruptors (EDs) in the regulatory assessment of plant protection products (PPP) and biocidal products (BP) has been published by the European Chemical Agency (ECHA) and the European Food Safety Authority (EFSA). The ECHA/EFSA guidance, mainly addressing EATS (estrogen, androgen, thyroid, steroidogenesis) modalities, is intended to guide applicants and assessors of the competent regulatory authorities on the implementation of the scientific criteria for the determination of ED properties pursuant to the recently implemented PPP ( EU 2018/605 ) and BP ( EU 2017/2100 ) EU Regulations. In this study, a search filter for targeted …
La formazione iniziale degli insegnanti attraverso la pratica del microteaching.
2014
Le metodologie che fanno uso della videoregistrazione sono sempre più utilizzate nella formazione professionale dei futuri insegnanti. La professionalità del docente richiede oltre alle conoscenze teoriche o disciplinari, la capacità di mobilitare i saperi per organizzare risposte efficaci a problemi complessi e rilevanti e la capacità di riflettere sul proprio agire. È necessario che durante il percorso universitario l’insegnante in formazione acquisisca specifiche competenze e capacità autoriflessive. Questo contributo descrive una metodologia per la creazione di esperienze formative centrate sull’utilizzo della videoregistrazione e per la raccolta di dati sull’effetto del video sull’appr…
Franču jaunā viļņa un videoblogeru stilistikas salīdzinošā analīze
2019
Bakalaura darba tēma ir franču jaunā viļņa un videoblogeru stilistikas salīdzinošā analīze. Pētījuma mērķis ir noskaidrot franču jaunā viļņa un videblogeru stilistiskās iezīmes. Darba problēma ir franču jaunā viļņa stilistiskās iezīmes videoblogeru saturā. Teorētiskajā daļā tiek aplūkoti kino valodas elementi, kino naratīvs, autorkino un franču jaunais vilnis, kā arī Cinéma-vérité un videoblogošana. Papildus teorijai sniegta informācija par Keisija Neistata, Bena Brauna, Romana Atvuda un Fēliksa Arvīda Ulf Šelberga biogrāfiju. Pētījums tiek veikts, izmantojot semiotisko un naratīva analīzi. Bakalaura darba pētnieciskais lauks aptver Keisija Neistata, Bena Brauna, Romana Atvuda un Fēliksa Ar…
Accurate detection and characterization of corner points using circular statistics and fuzzy clustering
1998
Accurate detection and characterization of corner points in grey level images is considered as a pattern recognition problem. The method considers circular statistic tests to detect 2D features. A fuzzy clustering algorithm is applied to the edge orientations near the prospective corners to detect and classify them. The method is based on formulating hypotheses about the distribution of these orientations around an edge, corner or other 2-D feature. The method may provide accurate estimates of the direction of the edges that converge in a corner, along with their confidence intervals. Experimental results show the method to be robust enough against noise and contrast changes. Fuzzy membersh…