86 research outputs found
On Using Gait in Forensic Biometrics
No full textGiven the continuing advances in gait biometrics, it appears prudent to investigate the translation of these techniques for forensic use. We address the question as to the confidence that might be given between any two such measurements. We use the locations of ankle, knee and hip to derive a measure of the match between walking subjects in image sequences. The Instantaneous Posture Match algorithm, using Harr templates, kinematics and anthropomorphic knowledge is used to determine their location. This is demonstrated using real CCTV recorded at Gatwick Airport, laboratory images from the multi-view CASIA-B dataset and an example of real scene of crime video. To access the measurement confidence we study the mean intra- and inter-match scores as a function of database size. These measures converge to constant and separate values, indicating that the match measure derived from individual comparisons is considerably smaller than the average match measure from a population
Gait Analysis and Recognition for Automated Visual Surveillance
No full textHuman motion analysis has received a great attention from researchers in the last decade due to its potential use in different applications such as automated visual surveillance. This field of research focuses on the perception and recognition of human activities, including people identification. We explore a new approach for walking pedestrian detection in an unconstrained outdoor environment. The proposed algorithm is based on gait motion as the rhythm of the footprint pattern of walking people is considered the stable and characteristic feature for the classification of moving objects. The novelty of our approach is motivated by the latest research for people identification using gait. The experimental results confirmed the robustness of our method to discriminate between single walking subject, groups of people and vehicles with a successful detection rate of 100%. Furthermore, the results revealed the potential of our method to extend visual surveillance systems to recognize walking people. Furthermore, we propose a new approach to extract human joints (vertex positions) using a model-based method. The spatial templates describing the human gait motion are produced via gait analysis performed on data collected from manual labeling. The Elliptic Fourier Descriptors are used to represent the motion models in a parametric form. The heel strike data is exploited to reduce the dimensionality of the parametric models. People walk normal to the viewing plane, as major gait information is available in a sagittal view. The ankle, knee and hip joints are successfully extracted with high accuracy for indoor and outdoor data. In this way, we have established a baseline analysis which can be deployed in recognition, marker-less analysis and other areas. The experimental results confirmed the robustness of the model-based approach to recognise walking subjects with a correct classification rate of 95% using purely the dynamic features derived from the joint motion. Therefore, this confirms the early psychological theories claiming that the discriminative features for motion perception and people recognition are embedded in gait kinematics. Furthermore, to quantify the intrusive nature of gait recognition we explore the effects of the different covariate factors on the performance of gait recognition. The covariate factors include footwear, clothing, carrying conditions and walking speed. As far as the author can determine, this is the first major study of its kind in this field to analyse the covariate factors using a model-based method
Le développement des interactions sociales et leurs impacts sur les réactions affectives dans une expérience de service
No full textInfluence De L’implication Durable sur L’intention et le Comportement D’achat Ecologique
No full textRésuméLa prise de conscience des problèmes écologiques est devenue de plus en plus importante en termes de consommation et de préoccupation pour l’environnement.L’objectif de cet article est d’examiner l’impact de l’implication durable et de l’intention d’achat des individus sur leur comportement d’achat des produits écologiques.Une étude empirique a été faite auprès d’un échantillon de 305 individus en Tunisie. La validation des hypothèses à travers l’analyse structurale montre que l’implication durable et l’intention agissent positivement sur le comportement d’achat des individus. En plus, les variables âge, genre et état civil, ont un effet modérateur significatif sur les liens de causalité entre les groupes. Des implications managériales et des recommandations sont alors proposées.AbstractThe awareness of environmental problems is becoming more and more important in terms of consumption and environmental concern. This paper examines how enduring involvement and buying intention influence the ecological products’ purchasing behavior. Research data were taken from a survey carried out on 305 Tunisian consumers. Using structural equation modeling, results show that enduring involvement and buying intention affect positively purchasing behavior. Further, age, gender and civil state have a significant moderating effect on causal links between groups. Finally, we discuss managerial implications and we provide recommendations
Determinants of Social Media Usage and Their Role in Enhancing Business Performance: Evidence from Medical Tourism Service Providers
No full textThis research examines the antecedents and performance outcomes of social media use in the medical tourism sector, drawing on the Technology Acceptance Model (TAM), the Technology–Organization–Environment (TOE) framework, and the Resource-Based View (RBV). Partial Least Squares Structural Equation Modeling (PLS-SEM) was employed to validate the proposed conceptual model. Data were collected through an online survey administered to 133 medical service providers in Tunisia. The results show that information intensity and perceived usefulness have a significant positive effect on social media usage, while perceived ease of use does not exhibit a significant influence. In addition, social media usage positively affects the marketing performance of medical tourism providers. This study highlights the importance of evaluating social media adoption from a managerial perspective. For professionals in the medical tourism industry, optimizing social media strategies can enhance marketing performance and strengthen competitive positioning
Customer-to-customer interaction in tourism experience: Moderating role of nationality
No full textIn this research, we examine the effect of extroversion and the perceived similarity on customer to customer interaction (CCI), and the effect of this interaction on the tourists’ reactions. We examine also the moderating role of the nationality in CCI and tourists behavior. The study is based on a sample of 519 tourists from different nationalities (Tunisian, French, German, British and Italian tourists) residing in hotels in Tunisia. The results show that extroversion and the perceived similarity contribute to the development of the interactions between customers, and that this type of interaction influences the tourists’ behavioral responses (desire of stay, satisfaction and loyalty). Similarly, the results indicate that the tourist's nationality moderates the relation between CCI and tourists’ reactions. Managers should have a clear and explicit strategic position in terms of interactions with customers. They can put forward their position by valuing and inciting the relationships between customers in terms of distraction, help or information
Emotion and Sponsorship: Case of Television Sponsorship
No full textSponsorship is a mode of communication that has led to the emergence of a growing body of literature. Most studies on sponsorship focused on the latter’s effectiveness yet were limited to the study of the influence of individual and situational variables. It was only recently that research on sponsorship had developed an interest in emotions. Some authors have addressed this issue from an empirical standpoint. The present article attempts to examine the impact of emotional reactions to a sponsored program on consumer behavior in terms of the attitude towards the brand and the purchase intention. The empirical study focused on the case of television sponsorship and specifically on sports programs in Tunisia. A survey was conducted on a sample of 200 individuals. The results show the positive effect of emotions on attitude towards the brand and the purchase intention
Couchsurfing: a new form of sustainable tourism and an exploratory study of its motivations and its effect on satisfaction with the stay
No full text
Purpose
This study seeks to explore the motivations behind couchsurfers’ decision to go couchsurfing, and also to explore the influence of the couchsurfing experience on the satisfaction with the stay.
Design/methodology/approach
The exploratory research is based on a qualitative study using several methods: a netnography, two focus groups and the critical incident technique. Our exploratory research has enabled us to identify the main motivations behind the choice of the couchsurfing experience as a form of sustainable tourism.
Findings
The obtained results show six major motivations: Financial reasons, the cultural experience, the need for social interaction, professional reasons, the emotional entertainment and the social responsibility. Similarly, the influence of couchsurfing on the satisfaction with the stay manifests itself through the concept of love and family.
Practical implications
Managers would consider the social and friendly dimension of the touristic experience as a strategic decision. Once, this decision is taken, it is important to find out how the accommodation providers manage to deploy the values that couchsurfing promotes, which are sociability and the preoccupation with the environment and the society.
Originality/value
The research proved the importance of couchsurfing and its social aspect for the tourists. In fact, the obtained results show that the conviviality and the social relationship that is developed between couchsurfers and their hosts during their couchsurfing experience is what accounts for the tourist’s satisfaction.
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Proposition of a Typology of Tunisian Consumers Based on their Ecologically Conscious Behavior
No full textThe environmental movement led companies to consider ecology as a strategic decisional criterion. Concerns have started to be integrated in the study and practice of management and marketing. The object of this research is to propose a typology of Tunisian consumers in terms of their ecologically conscious behavior. More specifically, this work describes the identified groups based on socio-demographic variables (such as gender, age, income, socio-professional category and religiosity) and on the psychographic variable perceived consumer effectiveness. To this end, we conducted a questionnaire survey next to 200 consumers. The empirical results show the existence of four consumer profiles which are the convinced, aware, mitigated and resistant which led us to produce some useful recommendations for marketing managers wishing to be positioned on the ecological axis
The responsible behavior of tourist: The role of personnel factors and public power and effect on the choice of destination
No full textThe purpose of this study is to examine the effect of social engagement, the concern for sustainable tourism, the exemplarity of public power on responsible behaviour of tourist, and the effect of the responsible behaviour on the choice destination. A 544 questionnaires were completed and structural equation modeling with AMOS was used to test the hypothesis. The findings highlight a positive effect of the determinants studied on responsible behavior of the tourist. It is only the concern with sustainable tourism what has no significant effect on the responsible behavior. Otherwise, the effect of responsible behavior of tourist on the choice of destination is positive
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