Understanding Near-Duplicate Videos: A User-Centric ApproachMauro Cherubini
Popular content in video sharing web sites (e.g., YouTube) is usually duplicated. Most scholars define near-duplicate video clips (NDVC) based on non-semantic features (e.g., different image/audio quality), while a few also include semantic features (different videos of similar content). However, it is unclear what features contribute to the human perception of similar videos. Findings of two large scale online surveys (N = 1003) confirm the relevance of both types of features. While some of our findings confirm the adopted definitions of NDVC, other findings are surprising. For example, videos that vary in visual content –by overlaying or inserting additional information– may not be perceived as near-duplicate versions of the original videos. Conversely, two different videos with distinct sounds, people, and scenarios were considered to be NDVC because they shared the same semantics (none of the pairs had additional information). Furthermore, the exact role played by semantics in relation to the features that make videos alike is still an open question. In most cases, participants preferred to see only one of the NDVC in the search results of a video search query and they were more tolerant to changes in the audio than in the video tracks. Finally, we propose a user-centric NDVC definition and present implications for how duplicate content should be dealt with by video sharing websites.
This document contains lecture notes on inverse trigonometric functions. It begins with definitions of inverse functions and conditions for a function to have an inverse. It then defines the inverse trigonometric functions arcsin, arccos, arctan, and arcsec and gives their domains and ranges. Examples are provided to illustrate calculating values of the inverse trigonometric functions. The document concludes with a brief discussion of notational ambiguity and an outline mentioning derivatives of inverse trigonometric functions and applications.
The document provides solutions to optimization problems involving finding dimensions that minimize or maximize areas subject to constraints. The solutions involve setting up objective functions of the relevant areas, finding critical points by taking derivatives, and determining if those points are maxima or minima. Dimensions are then calculated accordingly. The problems include minimizing total advertisement area given a fixed printed area, maximizing a printed area given a fixed total area, and minimizing material costs for a soda bottle given a fixed volume.
Understanding Near-Duplicate Videos: A User-Centric ApproachMauro Cherubini
Popular content in video sharing web sites (e.g., YouTube) is usually duplicated. Most scholars define near-duplicate video clips (NDVC) based on non-semantic features (e.g., different image/audio quality), while a few also include semantic features (different videos of similar content). However, it is unclear what features contribute to the human perception of similar videos. Findings of two large scale online surveys (N = 1003) confirm the relevance of both types of features. While some of our findings confirm the adopted definitions of NDVC, other findings are surprising. For example, videos that vary in visual content –by overlaying or inserting additional information– may not be perceived as near-duplicate versions of the original videos. Conversely, two different videos with distinct sounds, people, and scenarios were considered to be NDVC because they shared the same semantics (none of the pairs had additional information). Furthermore, the exact role played by semantics in relation to the features that make videos alike is still an open question. In most cases, participants preferred to see only one of the NDVC in the search results of a video search query and they were more tolerant to changes in the audio than in the video tracks. Finally, we propose a user-centric NDVC definition and present implications for how duplicate content should be dealt with by video sharing websites.
This document contains lecture notes on inverse trigonometric functions. It begins with definitions of inverse functions and conditions for a function to have an inverse. It then defines the inverse trigonometric functions arcsin, arccos, arctan, and arcsec and gives their domains and ranges. Examples are provided to illustrate calculating values of the inverse trigonometric functions. The document concludes with a brief discussion of notational ambiguity and an outline mentioning derivatives of inverse trigonometric functions and applications.
The document provides solutions to optimization problems involving finding dimensions that minimize or maximize areas subject to constraints. The solutions involve setting up objective functions of the relevant areas, finding critical points by taking derivatives, and determining if those points are maxima or minima. Dimensions are then calculated accordingly. The problems include minimizing total advertisement area given a fixed printed area, maximizing a printed area given a fixed total area, and minimizing material costs for a soda bottle given a fixed volume.
Este documento proporciona instrucciones para estudiantes sobre cómo grabar un mensaje de voz utilizando un Voicemailboard. Explica los pasos para acceder al Voicemailboard de la escuela, seleccionar un tema, conectar auriculares y un micrófono, grabar un mensaje de voz, reproducirlo y enviarlo si está satisfecho. También incluye una lista de vocabulario en varios idiomas.
1. Nieuwsbrief WebindeKlas/Voicemailboard/Vociz
03/2009, verschijnt onregelmatig
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Geachte lezer,
Hierbij ontvangt u weer een nieuwsbrief van WebindeKlas/Voicemailboard met daarin:
1 Voicemailboard ondersteunt Universiteit Groningen
2 Sponsoractie lustrum Rijksuniversteit Groningen
3 Vociz gebruikt bij onderzoek
4 Schoolpresentatie
5 Drie maanden op proef
6 Adressen
Deze nieuwsbrief mag ongevraagd verder worden verspreid.
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1 Voicemailboard ondersteunt Universiteit Groningen
Voicemailboard assisteert momenteel de Rijksuniversiteit Groningen bij de ontwikkeling van eigen
opnamemogelijkheden voor taalstudenten in de Nestor-omgeving van de universiteit.
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2 Sponsoractie lustrum Rijksuniversteit Groningen
Op 13 juni zal de Münchener professor voor klassieke talen, prof. dr. Wilfried Stroh, in het kader
van het 395-jarig bestaan van de Rijksuniversiteit Groningen te gast zijn bij Alumani, de vereniging
van oud-studenten Duits. ’Arts meet Science’ zal in zijn lezing ’Latein in der späten Neuzeit’ een
heel bijzondere invulling krijgen, omdat Wilfried Stroh de kunst van het gesproken Latijn beheerst.
Voicemailboard heeft in samenwerking met Global textware de promotionele actie met
ansichtkaarten gesponsord.
Voor meer informatie over Wilfried Stroh, met o.a. ook video-opnames:
http://www.webindeklas.nl/alumani/index.php?id=26
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3 Vociz gebruikt bij onderzoek
Voor een onderzoek in het kader van de zogenaamde 'Expeditie: Durven, delen, doen' is recent op
het Willem Lodewijk Gymnasium in samenwerking met de Universiteit van Amsterdam gebruik
gemaakt van de Vociz. Het ging om een onderzoek naar economische relaties waarbij de leerlingen
uit diverse jaarlagen hardop moesten reageren op stellingen en afbeeldingen. Het 'hardop denken'
werd vastgelegd met de Vociz, die voor dat doel was geïntegreerd in de ELO van de school en
achter het betreffende wachtwoord van Economie. Voor het verdere onderzoek werden de
2. 'gesprekken' van de leerlingen getranscribeerd.
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4 Schoolpresentatie
Regelmatig verzorgen wij presentaties op scholen en krijgen dan de vraag voorgelegd waar de
school voor moet zorgen. Meer daarover leest u op onze blogsite onder:
http://voicemailboard.blogspot.com/2008/12/schoolpresentatie.html
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5 Drie maanden op proef
De eerste drie maanden kunt u het voicemailboard gratis en zonder verplichtingen uitproberen.
Mocht u collega's op deze actie attent willen maken, heel graag:
http://www.webindeklas.nl/main/index.php?id=21
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6 Adressen
Voicemailboard:
http://www.voicemailboard.nl
Vociz:
http://www.vociz.nl
Contact:
info@webindeklas.nl
Weblog Voicemailboard/Vociz:
http://voicemailboard.blogspot.com
Archief nieuwsbrieven:
http://www.webindeklas.nl/main/index.php?id=48
FAQ:
http://www.webindeklas.nl/main/index.php?id=39
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Wij wensen u en uw leerlingen uiteraard veel plezier met het voicemailboard en houden ons voor
vragen, op- en aanmerkingen van harte aanbevolen. Deze nieuwsbrief mag ongevraagd verder
verspreid worden.
Met vriendelijke groet,
namens WebindeKlas/Voicemailboard,