scholarly journals AUTHENTICATION OF DIGITAL MP4 VIDEO RECORDINGS USING FILE CONTAINERS AND METADATA PROPERTIES

2021 ◽  
Vol 10 (2) ◽  
pp. 28-38
Author(s):  
Gangwar D.P. ◽  
Anju Pathania ◽  
Anand ◽  
Shivanshu
Keyword(s):  
Structural Analysis ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Digital Video ◽  
Video Recording ◽  
File Format ◽  
New Approach ◽  
Video Recordings ◽  
Crime Investigation ◽  
New Challenges

The authentication of digital video recording plays a very important role in forensic science as well as for other crime investigation purposes. The field of forensic examination of digital video is continuously facing new challenges. At present the authentication of the video is carried out on the basis of pixel-based analysis. Due to the change in technology, it was felt that a new approach is required for the authentication of digital video recordings. In the present work a new approach i.e. analysis of media Information and structural analysis of video containers (boxes/ atoms) of mp4 file format have been applied for identification of original and edited videos. This work is limited only for Mp4 file format because the MP4 compressed format is widely used in most of the mobile phone for video recording and transmission purposes. For this purpose, we recorded more than 200 video samples using more than 20 different mobile phones of different make and models and more than 12 video editors, which are available in open source used for editing purpose. The original and edited MP4 video files were analyzed for their different metadata and structural contents analysis of different file containers (boxes/atoms) using different freeware tools. The details of the work are described below.

Correlating Personality and Actual Phone Usage

2014 ◽  
Vol 35 (3) ◽  
pp. 158-165 ◽  
Author(s):  
Christian Montag ◽  
Konrad Błaszkiewicz ◽  
Bernd Lachmann ◽  
Ionut Andone ◽  
Rayna Sariyska ◽  
...  
Keyword(s):  
Big Data ◽  
Social Network ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Self Report ◽  
Psychological Variables ◽  
New Approach ◽  
Report Data ◽  
Self Report Data ◽  
Voice Calls

In the present study we link self-report-data on personality to behavior recorded on the mobile phone. This new approach from Psychoinformatics collects data from humans in everyday life. It demonstrates the fruitful collaboration between psychology and computer science, combining Big Data with psychological variables. Given the large number of variables, which can be tracked on a smartphone, the present study focuses on the traditional features of mobile phones – namely incoming and outgoing calls and SMS. We observed N = 49 participants with respect to the telephone/SMS usage via our custom developed mobile phone app for 5 weeks. Extraversion was positively associated with nearly all related telephone call variables. In particular, Extraverts directly reach out to their social network via voice calls.

Deterrence of Piracy Employing IR Transmitter and Steganography System

2021 ◽  
Vol 1 (2) ◽  
pp. 32-40
Author(s):  
A.M. Prasanna Kumar ◽  
Bharathi Gururaj
Keyword(s):  
Mobile Phone ◽  
Film Industry ◽  
Video Recording ◽  
Research Work ◽  
Infrared Light ◽  
Novel Technique ◽  
Video Recordings ◽  
Light Rays ◽  
Film Piracy ◽  
Mobile Phone Camera

Moving picture entertainment is a foremost source of amusement for populace in today’s existence. To entertain populace a lot of investment is put into film production by the film makers. Their endeavour is being ruined by few people by pirate the movies substance. They do it by capture the video recording in mobile phone camera and upload it to websites or put up for sale it to people which cause huge loss. In this research work we are proposea novel technique for reduction of film piracy by avoiding fake video recordings of video in theatres. An indistinguishable luminosity is projected from the display to the whole spectators that falls on the camera lens which is sensitive to infrared light rays Makes the recorded video unfit to watch. A method is developed for anti-piracy system for film industry using steganography technique in MATLAB.

Understanding Mobile Phone Usage through a Value-Based Approach: Marketing Implications

2015 ◽  
pp. 213-220
Author(s):  
Yung Kyun Choi ◽  
Sungmi Lee
Keyword(s):  
Mobile Phone ◽  
Everyday Life ◽  
Mobile Devices ◽  
Mobile Phones ◽  
Mobile Services ◽  
Marketing Environment ◽  
A Value ◽  
Managerial Implications ◽  
New Challenges ◽  
Mobile Phone Usage

As mobile devices increasingly become a ubiquitous and essential part of everyday life, marketers must face a host of new challenges. This new marketing environment requires that marketers understand how consumers use their mobile phones and, more particularly, how they perceive and derive value from doing so. In this article, the authors suggest that mobile services offer either context-related or content-related values. They also explore managerial implications, by revealing factors that influence consumers to utilize mobile phone services.

The Effect of Prestige Sensitivity on Price Acceptance in Vietnam’s Mobile Phone Market

2018 ◽  
pp. 97-112
Author(s):  
Huyen Thi Nguyen ◽  
Ngoc Minh Nguyen
Keyword(s):  
Mobile Phone ◽  
Mobile Phones ◽  
Structural Equation ◽  
Sampling Method ◽  
Product Knowledge ◽  
Mediating Role ◽  
Modelling Method ◽  
Equation Modelling ◽  
Convenience Sampling

The purpose of this study is to examine the effect of prestige sensitivity on mobile phone customer’s price acceptance in Vietnam and the mediating role of product knowledge and price mavenism on this relationship. We used the convenience sampling method for data collection via questionnaires with a sample of 605 consumers who purchased mobile phones. The collected data was analysed by applying a structural equation modelling method. The result indicates that prestige sensitivity has both direct and indirect effects on price acceptance via product knowledge and price mavenism. The findings suggest that prestige sensitivity can be used as a market segmentation criterion for mobile phones when making price decisions and providing customers with adequate information could improve price acceptance.

Effects of Time and Perceptual Orientation on Actors' and Observers' Attributions

1984 ◽  
Vol 58 (1) ◽  
pp. 23-30
Author(s):  
Donald S. Martin ◽  
Ming-Shiunn Huang
Keyword(s):  
Video Recording ◽  
Control Group ◽  
Control Groups ◽  
Video Recordings ◽  
Before And After ◽  
Perceptual Orientation ◽  
Initial Difference ◽  
Variety Show ◽  
And Control ◽  
Unrelated Variety

The actor/observer effect was examined by Storms in a 1973 study which manipulated perceptual orientation using video recordings. Storms' study was complex and some of his results equivocal. The present study attempted to recreate the perceptual reorientation effect using a simplified experimental design and an initial difference between actors and observers which was the reverse of the original effect. Female undergraduates performed a motor co-ordination task as actors while watched by observers. Each person made attributions for the actor's behaviour before and after watching a video recording of the performance. For a control group the video recording was of an unrelated variety show excerpt. Actors' initial attributions were less situational than observers'. Both actors and observers became more situational after the video replay but this effect occurred in both experimental and control groups. It was suggested the passage of time between first and second recording of attributions could account for the findings and care should be taken when interpreting Storms' (1973) study and others which did not adequately control for temporal effects.

QUALITATIVE CHANGES IN RHYTHMIC GYMNASTICS HOOP THROWS FROM THE PERSPECTIVE OF BIOMECHANICAL ANALYSIS

2020 ◽  
pp. 1-8
Author(s):  
Raluca Tanasa
Keyword(s):  
Correlation Coefficient ◽  
Video Recording ◽  
Biomechanical Analysis ◽  
Fundamental Groups ◽  
Horizontal Distance ◽  
Video Recordings ◽  
Rhythmic Gymnastics ◽  
Female Gymnasts ◽  
Execution Technique ◽  
Qualitative Changes

Throws and catches in rhythmic gymnastics represent one of the fundamental groups of apparatus actuation. They represent for the hoop actions of great showmanship, but also elements of risk. The purpose of this paper is to improve the throw execution technique through biomechanical analysis in order to increase the performance of female gymnasts in competitions. The subjects of this study were 8 gymnasts aged 9-10 years old, practiced performance Rhythmic Gymnastics. The experiment consisted in video recording and the biomechanical analysis of the element “Hoop throw, step jump and catch”. After processing the video recordings using the Simi Motion software, we have calculated and obtained values concerning: launch height, horizontal distance and throwing angle between the arm and the horizontal. Pursuant to the data obtained, we have designed a series of means to improve the execution technique for the elements comprised within the research and we have implemented them in the training process. Regarding the interpretation of the results, it may be highlighted as follows: height and horizontal distance in this element have values of the correlation coefficient of 0.438 and 0.323, thus a mean significance of 0.005. The values of the arm/horizontal angle have improved for all the gymnasts, the correlation coefficient being 0.931, with a significance of 0.01. As a general conclusion, after the results obtained, it may be stated that the means introduced in the experiment have proven their efficacy, which has led to the optimisation of the execution technique, thus confirming the research hypothesis.

Women, Empowerment, and Mobile Phones in the Developing World

2020 ◽  
pp. 528-544
Author(s):  
Laura Stark
Keyword(s):  
Developing Countries ◽  
Mobile Phone ◽  
Social Status ◽  
Mobile Phones ◽  
Mobile Communication ◽  
Recent Literature ◽  
Mobile Telephony ◽  
Women Empowerment ◽  
Gender And Development ◽  
And Control

This chapter surveys and analyzes recent literature on mobile communication to examine its relationship to gender and development, more specifically how women in developing countries use and are impacted by mobile phones. Focusing on issues of power, agency, and social status, the chapter reviews how mobile telephony has been found to be implicated in patriarchal bargaining in different societies, how privacy and control are enabled through it, what benefits have been shown to accrue to women using mobile phones, and what barriers, limitations, and disadvantages of mobile use exist for women and why. The conclusion urges more gender-disaggregated analysis of mobile phone impact and use and offers policy and design recommendations based on the overview and discussion.

Spatial-temporal variables for swimming coaches: A comparison study between video and TritonWear sensor

2021 ◽  
pp. 174795412110137
Author(s):  
Robin Pla ◽  
Thibaut Ledanois ◽  
Escobar David Simbana ◽  
Anaël Aubry ◽  
Benjamin Tranchard ◽  
...  
Keyword(s):  
Swimming Performance ◽  
Video Recording ◽  
Open Water ◽  
Percentage Error ◽  
Stroke Index ◽  
Wearable Sensor ◽  
Stroke Length ◽  
Video Recordings ◽  
Temporal Variables ◽  
Training Sets

The main aim of this study was to evaluate the validity and the reliability of a swimming sensor to assess swimming performance and spatial-temporal variables. Six international male open-water swimmers completed a protocol which consisted of two training sets: a 6×100m individual medley and a continuous 800 m set in freestyle. Swimmers were equipped with a wearable sensor, the TritonWear to collect automatically spatial-temporal variables: speed, lap time, stroke count (SC), stroke length (SL), stroke rate (SR), and stroke index (SI). Video recordings were added as a “gold-standard” and used to assess the validity and the reliability of the TritonWear sensor. The results show that the sensor provides accurate results in comparison with video recording measurements. A very high accuracy was observed for lap time with a mean absolute percentage error (MAPE) under 5% for each stroke (2.2, 3.2, 3.4, 4.1% for butterfly, backstroke, breaststroke and freestyle respectively) but high error ranges indicate a dependence on swimming technique. Stroke count accuracy was higher for symmetric strokes than for alternate strokes (MAPE: 0, 2.4, 7.1 & 4.9% for butterfly, breaststroke, backstroke & freestyle respectively). The other variables (SL, SR & SI) derived from the SC and the lap time also show good accuracy in all strokes. The wearable sensor provides an accurate real time feedback of spatial-temporal variables in six international open-water swimmers during classical training sets (at low to moderate intensities), which could be a useful tool for coaches, allowing them to monitor training load with no effort.

scholarly journals Misuse and addiction to mobile phone in a sample of first-grade secondary school students of Palermo

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
S Pizzo ◽  
C Costantino ◽  
D Giliberti ◽  
I Calò ◽  
C Vella ◽  
...  
Keyword(s):  
Secondary School ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Representative Sample ◽  
Secondary School Students ◽  
First Grade ◽  
Educational Interventions ◽  
School Students ◽  
Developed Country ◽  
Teenagers And Young Adults

Abstract Background Nowadays, smartphone overuse affects massively teenagers and young adults. From 2014 to 2018 in Italy, for the 11-17 years age group, there has been an increase from 79.9% to 85.8% of daily mobile phone users. This project aims to investigate usage prevalence and misuse/addiction of mobile phones in a representative sample of first-grade secondary school students of the Province of Palermo, Italy, carrying out educational interventions to promote a proper and conscious use of smartphone. Materials and Methods An anonymous, standardized and previously validated pre-intervention questionnaire consisting of 39 items on general socio-demographic characteristics, attitudes and habits regarding smartphone usage, was administered online to 10-15 years old students of the Palermo's Province. Moreover, two additional sets of 11 and 15 items contributed to calculate a Misuse and an Addiction Score, respectively. After administration, educational interventions aimed at promoting the correct and conscious use of the smartphone, were carried out. Results A total of 1600 students belonging to 16 schools, responded to the questionnaire. 93% of the sample had a personal smartphone and 84% had a personal profile on at least one social network. About 15% of the sample experienced cyber bullying episodes and 30% accessed to adult content online (38% of parents didn't set parental control on the devices). Overall, 78.3% of the sample showed a moderate to severe misuse and 38.3% a moderate to severe addiction to mobile phones. Conclusions The uncontrolled and unconscious use of smartphones among adolescents exposes to different health risks including psycho-social and cognitive-relational problems. Results obtained demonstrate high levels of misuse and addiction to mobile devices in a representative sample of students in a developed Country, suggesting the need to implement educational interventions and the development of guidelines to encourage a responsible use of smartphones. Key messages The present study highlights an uncontrolled and unconscious use of mobile phones among 11-15 years old aged students in Southern Italy. The implementation of educational intervention at school and the development of guidelines regulating smartphone usage among adolescents, should represent a future global health priority.

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