• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 728
  • 165
  • 141
  • 133
  • 84
  • 77
  • 62
  • 55
  • 42
  • 38
  • 23
  • 8
  • 7
  • 7
  • 6
  • Tagged with
  • 1727
  • 346
  • 309
  • 273
  • 246
  • 242
  • 228
  • 215
  • 212
  • 193
  • 189
  • 171
  • 146
  • 134
  • 132
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
401

Ungdomars attityder till att köra mopedonyktra / Adolescent’s attitudes to drunk driving on a moped

Mikiver, Rasmus, Andersson, Rasmus January 2012 (has links)
Det övergripande syftet med den här uppsatsen var att undersöka vad som påverkar unga mopedförares intentioner till att köra alkoholpåverkade.  Ytterligare ett syfte var att belysa de generella attityder till alkohol- och trafikrelaterade frågor som finns bland svenska ungdomar. Samtliga resultat och analyser baserades på en enkätundersökning utförd av Statens väg- och transportforskningsinstitut (VTI). Enkäten vände sig till gymnasieelever och i analyserna behandlades svar från 1 933 elever i åldersintervallet 15 – 21 år. De statistiska analyserna innefattade χ2-test samt en ordinal logistisk regressionsmodell. Resultaten visade att ungdomarna generellt såg det som oacceptabelt att köra moped med alkohol i blodet. Dock trodde de inte i riktigt lika hög utsträckning att bästa kompisen såg det som oacceptabelt. Det som visade sig ha störst påverkan på ungdomarnas intentioner till att köra mopedonyktra var hur troligt de ansåg det vara att bästa kompisen skulle köra i samma situation. Resultaten visade även att personer som tidigare kört påverkade besitter en klart högre intention att åter köra mopedonyktra. / The overall objective of this report was to examine what affect young moped driver’s intentions to drive after drinking alcohol. A further aim was to illustrate Swedish adolescent’s attitudes towards alcohol and traffic in general. All results and analysis are based on a survey created by Swedish National Road and Transport Research Institute (VTI). The survey was addressed to high school students and the analysis consisted of answers from 1 933 students in the age of 15 - 21 years. The statistical analysis included χ2-tests as well as an ordinal logistic regression model. The results showed that adolescents in general thought it was an unacceptable behavior to drink and drive. However, the extent of expected acceptance level was higher when assessing their friend’s opinion. What proved to be most essential for the adolescent’s intentions was how likely they considered it to be that their best friends would drive in the same situation. The results also showed that a person with earlier experience of driving a moped with influence of alcohol or drugs has a clearly higher intention to drink and drive again.
402

Key determinants for user intention to adopt smart home ecosystems

Haglund, Kristian, Flydén, Pia January 2018 (has links)
IoT is a technology where different devices are equipped with internet connection which makes it possible to control them and exchange data over internet. IoT can be thought of as an umbrella term covering a broad and ever-growing range of services and technologies. One of the segments within IoT is the smart home ecosystem. The tremendous development the last decade within smartphones, wearable devices and broadband has created new ways to connect individual devices in the home (Qasim and Abu-Shanab, 2016; Jeong et al, 2016; Wilson et al, 2017; Hubert et al, 2017). This creates a synergy effect; by connecting multiple devices to a system new value is created. Energy, home controls, security, communication and entertainment services are all included in the smart home (Miller, 2015; Wilson et al, 2017). Even though the concept of smart homes has a large potential it seems like it has not reached its full potential and the diffusion of the innovation among the consumers is still at an early stage (Balta-Ozkan et.al, 2013; Yang et.al 2017). So far, many studies have been performed on the technical aspects of IoT and smart home ecosystems but less attention has been paid on the consumer point of view and what determinants that play a role in the intention to adopt the technology (Yang, Lee, and Zo. 2017). In addition, previous studies have mainly focused of one single device and has not considered the entire ecosystem (Yang, Lee, and Zo. 2017). Therefore, the purpose with this thesis is to study what are the key determinants for the intention to adopt smart homes from an ecosystem point of view. To fulfill the purpose known theoretical models regarding intention to adopt technology have been used to develop a research model. The basis to establish the research model has been the theory of innovation adoption, TRA, TPB, TAM, VAM and UTAUT. Based on the literature four determinants were selected to be included in the model; these were cost, perceived ease of use, perceived usefulness and individualization. The first three are all included in the mentioned theoretical models and have previously been proven to be important for intention to adopt. The last one, individualization is derived from the field of product differentiation. In the literature it is mentioned that the possibility to refine, adjust and modify may be crucial for the user (Dodgson et.al. 2008). With this background it was interested to include individualization as a determinant in the research model and study how it impacts intention to adopt. In addition to the determinants one moderator was included; the composition of the household. In order to collect the empirical data a survey was conducted using the snowball sampling approach via Facebook and LinkedIn. The survey consisted of two sections where the first section aimed to collect background information about the respondent and the second section consisted of questions regarding the determinants. In the second section the respondents were asked to respond according to a 5-point Likert scale. The used questions in the survey was predefined in the literature. Study results show that consumers’ use intention is shaped by individualization, perceived usefulness and perceived ease of use. Cost was found not to be statistically significant. Neither was the composition of the household.
403

Planification pour la gestion autonomique de l'élasticité d'applications dans le cloud / Model and mechanisms to support the elasticity of distributed applications in the cloud

Letondeur, Loic 31 October 2014 (has links)
Le Cloud Computing permet une optimisation des coûts de déploiement et de maintenance des applications. Grâce au cloud, celles-ci peuvent être déployées et reconfigurées en l'espace de quelques minutes. La nécessité pour une application d'être en permanence à la juste taille afin que celle-ci maintienne continuellement une qualité de service suffisante sans pour autant utiliser trop de ressources, requiert de mettre en place l'élasticité des applications dans le cloud. Cependant, l'état de l'art montre que les solutions actuelles de gestion de l'élasticité sont restreintes à des applications multi-tiers tout en limitant fortement les scénarios possibles. Le cloud est effectivement un paradigme jeune et les différents acteurs du marché ont rapidement cherché à offrir l'élasticité. Si cette élasticité présente l'avantage indéniable d'apporter une mise place rapide et simple de l'élasticité, celle-ci n'obéit pas aux besoins de nombreux utilisateurs.Afin de repousser les limites actuelles de l'élasticité, les travaux présentés dans ce manuscrit proposent un outil de spécification de l'élasticité nommé Vulcan. A la fois simple et complet, Vulcan montre qu'il n'existe pas de corrélation entre la complétude de la solution et la complexité de son utilisation. Basé sur une approche autonomique, Vulcan apporte les contributions suivantes : - un modèle d'applications élastiques : celui-ci permet de décrire selon un mode dit "par intention", la façon dont l'application doit évoluer au cours des reconfigurations induites par l'élasticité. Le formalisme de ce modèle est à la base de la simplicité recherchée quant à l'utilisation de la solution.- un algorithme de planification : cet algorithme permet la résolution des différents paramètres lors de l'élasticité tout en offrant une compréhension simple à l'utilisateur de Vulcan.- un prototype qui met en oeuvre l'ensemble des concepts mis en avant dans ce document.Reposant sur des principes à la fois novateurs mais également issus de solutions éprouvées, des expérimentations ont démontré tant les capacités d'intégration de Vulcan vis-à-vis de l'existant, que la viabilité des concepts proposés ou le potentiel de l'approche. Il en ressort une solution générique, sans restriction quant aux applications gérées et qui repousse les limites actuelles en matière d'élasticité. / Cloud computing permits cost optimization of both deployment and maintenance applications. Thanks to the cloud, applications can be deployed and reconfigured in a few minutes. Each application can thus be continuously maintained at a fair size, so that it can continuously maintain a sufficient quality of service without using too many resources. This adaptation is achieved thanks to the feature named « elasticity ». However, the state of the art shows that current solutions for the management of elasticity are restricted to multi-tier applications and do not manage all possible scenarios. The cloud is actually a young paradigm and the various market providers manage to offer elasticity. If the provided elasticity has the undeniable advantage of being a fast and easy mean to manage basic cases, it does not address the needs of many users.To tackle the current limits of elasticity, the work presented in this manuscript propose a tool for the specification of elasticity that is named Vulcan. Besides being simple and complete, Vulcan shows that there is no correlation between the completeness of a solution for the management of elasticity and the complexity of its use. Based on an autonomous approach, Vulcan brings the following contributions :- a model for elastic applications : it is used to describe how an application should evolve over the reconfigurations induced during elasticity. This description is done at a high level said « by intension » thanks to an innovative formalism. The proposed formalism is at the basis of the Vulcan simplicity of use.- a scheduling algorithm : this algorithm resolves various parameters during elasticity while providing to the user of Vulcan an easy comprehension. - a prototype that implements all of the concepts described in this manuscript.Making use of both innovative concepts and principles from proven solutions, Vulcan has shown its capabilities to push the current limits of elasticity.
404

L’évolution de l’intention et le développement de l’esprit d’entreprendre des élèves ingénieurs d’une école française : une étude longitudinale / The development of entrepreneurial intentions and entrepreneurial spirit : a longitudinal study in the case of engineering students in a French Grande Ecole

Wang, Yifan 28 September 2010 (has links)
L’engagement dans la création d’entreprise est un évènement rare et tardif chez les ingénieurs français. Pour changer cette situation et former davantage des ingénieurs-entrepreneurs, nous étudions l’impact de la formation dans une grande école d’ingénieurs en France. La problématique s’inscrit dans le cadre théorique du comportement planifié complété par la théorie de la carrière entrepreneuriale et la notion d’esprit d’entreprendre. Nous avons suivi une approche longitudinale afin d’étudier l’évolution des intentions et de la construction des identités professionnelles ainsi que les comportements observables associés au cours de leur formation. La thèse s’appuie sur un questionnaire posé chaque année au cours du curriculum et des entretiens semi-directifs en fin de cursus auprès des élèves ingénieurs. Elle aboutit à l’identification de plusieurs identités professionnelles d’ingénieurs (ingénieur technique, manager, entrepreneur) et la caractérisation de la trajectoire de l’intention qui mène au choix de carrière entrepreneuriale. L’impact des facteurs socioculturels, scolaires et extrascolaires sur la trajectoire de l’intention a été modélisé. Il permet d’expliquer la construction de chaque identité professionnelle / Although many researchers point out the emergence of new generations of engineers, the traditional model of the French engineer remains reluctant to entrepreneurship, few engineers are moving towards entrepreneurial careers and they do it rather late in their career. To reverse this trend and train more entrepreneurial engineers, we study educational impact of an engineering Grande Ecole in France. Drawing on the theory of planned behaviour completed by the theory of entrepreneurial career and the notion of entrepreneurial spirit, we use a longitudinal approach to measure the evolution of intention, together with the construction of professional identities and observable behaviours of students during their school years. This study is based on a longitudinal survey completed each year by engineering students and semi-structured interviews with them at the end of the curriculum. The findings include the identification of three engineering professional identities (technical engineer, manager, and entrepreneur) and the definition of the entrepreneurial intention trajectory Leading to entrepreneurial career choice. The impacts of socio-cultural, pedagogical and extra curriculum factors on the trajectory of intention have been modelled. They can explain the building up process of each engineering professional identity
405

La sociologie de la traduction comme révélateur des freins et des facilitateurs de la conduite du changement à l'hôpital public : le cas du projet de fidélisation du personnel infirmier de psychiatrie / Actor network sociology as revealing the obstacles and conduct change facilitators in public hospital : the case of project aim to retain nurse psychiatric staff

Boiteau, Karine 11 July 2016 (has links)
Notre recherche répond à une volonté d’explorer une méthode d’humanisation de l’implantation des principes du NPM pour rendre le changement à l’hôpital socialement plus acceptable. Compatible avec un management polyphonique propice aux changements lorsque des individus aux valeurs et aux intérêts divergents doivent coopérer autour d’une problématique, la sociologie de la traduction s’est donc imposée comme grille d’analyse d’un processus de changement que nous observons et que nous conduisons à travers deux projets visant la fidélisation du personnel. Dans une posture transformative, notre recherche-intervention repose sur deux études de cas similaires dans des hôpitaux publics. Le rapport ethnographique au terrain a été favorisé par une CIFRE et nous a permis un recueil de données riches et variées. Nous avons ainsi contribué à l’identification des déterminants de l’intention de départ des infirmiers de psychiatrie en France grâce à la mise en place de groupes de travail multidisciplinaires. Puis dans une seconde période de mise en œuvre des projets co-construits avec les acteurs de terrain, nous avons identifié les freins et les facilitateurs du changement. / We initialised this piece of research in order to explore methods that could humanise the implementation of NPM principles and make changes in hospital environments socially more acceptable. Compatible with a polyphonic management, favourable to change when people with different values and opposing interests have to co-operate around one same issue, Actor Network sociology became an obvious assessment matrix for a change process that we have been observing and conducting via two projects that aim to retain staff. .Lead in a transformative approach, our research and intervention is based on two similar case-studies undertaken in public hospitals that have to face chronic shortages in nursing staff in psychiatric wards. Our ethnographic connection with the field was possible thanks to a CIFRE. It enabled us to obtain all kinds of rich and diversified data. We thereby brought our contribution to identifying what determines the initial intentions of psychiatric nursing staff in France, thanks to the organisation of multi-disciplinary workshops. During the second part of the implementation of our projects, thought-out in total collaboration with the actors on the field, we determined the actual obstacles to change as well as change-facilitators.
406

Une analyse empirique des antécédents de l’intention de continuer l’usage d’une technologie de l’information : cas de l’internet mobile en France / An empirical analysis of the continuance intention antecedents of an information technology : the case of the mobile internet in France

Jelassi, Khaouter 26 November 2010 (has links)
L’objectif de cette recherche est d’étudier l’influence du comportement et des affects sur l’intention de continuer l’usage d’une technologie de l’information, l’Internet Mobile. Un modèle conceptuel a été développé en se basant sur les recherches antérieures (notamment le modèle TAM et le modèle ECM) et une recherche qualitative. Ce modèle de la continuité d’usage permet d’étudier l’impact du comportement présent (usage et satisfaction) sur les réponses futures (intention de continuer l’usage). L’usage et la satisfaction sont influencés par les perceptions de l’Internet Mobile (utilité, facilité, amusement, valeur et qualité). Les relations du modèle sont modérées par un ensemble de variables modératrices (genre, âge et ancienneté d’usage). La collecte des données a été effectuée à l’aide d’un questionnaire en ligne. L’analyse des données par les équations structurelles a permis de valider empiriquement onze hypothèses de recherche issues de ce modèle. Les résultats suggèrent que l’intention de continuer l’usage de l’Internet Mobile est déterminée par l’usage de ce service et par la satisfaction des utilisateurs. La satisfaction des utilisateurs, à son tour, est influencée par la facilité, l’amusement et la qualité des services alors que l’usage est déterminé par l’utilité, la facilité, l’amusement et la valeur. Les implications managériales et théoriques, ainsi que les voies futures de recherche ont été mises en perspectives / The purpose of the current research is to investigate the influence of behavior and affect on the continuance intention of an information technology, the Mobile Internet. A conceptual model, based on a literature review (including the models TAM and ECM) and a qualitative research, is proposed. This post-adoption model examines the impact of the actual behavior (usage and satisfaction) on future responses (continuance intention). Usage and satisfaction are influenced by Mobile Internet post-adoption beliefs (usefulness, ease of use, enjoyment, value and quality). A number of moderating variables are included (gender, age and past experience). Data collection was performed using a web questionnaire. Data analysis by structural equation has empirically validated eleven research hypotheses derived from this model. The results suggest that mobile Internet continuance intention is determined by usage and satisfaction. User satisfaction, in turn, is influenced by ease of use, enjoyment and quality while usage is determined by usefulness, ease of use, enjoyment and value. Theoretical and managerial implications of the results are discussed. Finally, suggestions concerning future research about Mobile Internet are presented
407

Modeling Spatiotemporal Pedestrian-Environment Interactions for Predicting Pedestrian Crossing Intention from the Ego-View

Chen Chen (11014800) 06 August 2021 (has links)
<div> <div> <div> <p>For pedestrians and autonomous vehicles (AVs) to co-exist harmoniously and safely in the real-world, AVs will need to not only react to pedestrian actions, but also anticipate their intentions. In this thesis, we propose to use rich visual and pedestrian-environment interaction features to improve pedestrian crossing intention prediction from the ego-view. We do so by combining visual feature extraction, graph modeling of scene objects and their relationships, and feature encoding as comprehensive inputs for an LSTM encoder-decoder network. </p> <p>Pedestrians react and make decisions based on their surrounding environment, and the behaviors of other road users around them. The human-human social relationship has already been explored for pedestrian trajectory prediction from the bird’s eye view in stationary cameras. However, context and pedestrian-environment relationships are often missing in current research into pedestrian trajectory, and intention prediction from the ego-view. To map the pedestrian’s relationship to its surrounding objects we use a star graph with the pedestrian in the center connected to all other road objects/agents in the scene. The pedestrian and road objects/agents are represented in the graph through visual features extracted using state of the art deep learning algorithms. We use graph convolutional networks, and graph autoencoders to encode the star graphs in a lower dimension. Using the graph en- codings, pedestrian bounding boxes, and human pose estimation, we propose a novel model that predicts pedestrian crossing intention using not only the pedestrian’s action behaviors (bounding box and pose estimation), but also their relationship to their environment. </p> <p>Through tuning hyperparameters, and experimenting with different graph convolutions for our graph autoencoder, we are able to improve on the state of the art results. Our context- driven method is able to outperform current state of the art results on benchmark dataset Pedestrian Intention Estimation (PIE). The state of the art is able to predict pedestrian crossing intention with a balanced accuracy (to account for dataset imbalance) score of 0.61, while our best performing model has a balanced accuracy score of 0.79. Our model especially outperforms in no crossing intention scenarios with an F1 score of 0.56 compared to the state of the art’s score of 0.36. Additionally, we also experiment with training the state of the art model and our model to predict pedestrian crossing action, and intention jointly. While jointly predicting crossing action does not help improve crossing intention prediction, it is an important distinction to make between predicting crossing action versus intention.</p> </div> </div> </div>
408

Faktorer som influerar sjuksköterskor att lämna sin arbetsplats– en litteraturöversikt / Factors that influence nurses to leave their workplace – a literature review

Arebratt, Josefine, Jansson, Karin January 2021 (has links)
Bakgrund: Sjuksköterskeyrket är ett av 22 yrken som kräver legitimation som bevis på att man genomgått erforderlig utbildning och har kompetens att arbeta inom yrket. Sjuksköterskan är ledare inom omvårdnad och bör besitta en mängd olika egenskaper för att kunna utföra sitt arbete. Efterfrågan av grundutbildade sjuksköterskor ökar i samband med ett ökat antal invånare i Sverige samt ökat antal äldre personer i samhället. Trots en ökning av utfärdade sjuksköterskelegitimationer uppger flertalet regioner i Sverige att det råder brist på grundutbildade sjuksköterskor. Sjuksköterskebristen ger negativa konsekvenser i sjuksköterskors yrkesutövning och har en direkt påverkan på patientsäkerheten. Tidigare forskning visar att sjuksköterskor överväger att lämna sin arbetsplats upprepat antal per år.Syfte: Att beskriva faktorer som kan influera sjuksköterskan att lämna sin arbetsplats inom hälso- och sjukvården.Metod: Litteraturöversiktens resultat baseras på 15 vetenskapliga artiklar som är publicerade mellan åren 2010 och 2020. Artiklarna hämtades i databaserna CINAHL och PubMed.Resultat: Resultatet delades in i två huvudkategorier som benämndes Organisatoriska faktorer och Individuella faktorer. Vidare kunde sex subkategorier identifieras med koppling till huvudkategorierna.Slutsats: Sjuksköterskor väljer att lämna sin arbetsplats på grund av en mängd olika faktorer, där en bristfällig arbetsmiljö sticker ut som den främsta faktorn. Sjuksköterskor upplever en hög arbetsbörda i kombination med underbemanning på arbetsplatsen som leder till att sjuksköterskor väljer att lämna, vilket påverkar både patienter och sjuksköterskor. För att undvika att sjuksköterskor väljer att lämna sin arbetsplats är det av vikt att de upplever en god arbetsmiljö, bra ledning och att de har en positiv uppfattning av sitt yrke. / Background: The nursing profession requires a license as proof you have undergone the required education and possess the skills to work in the profession. The nurse is a leader in nursing and should possess a variety of qualities in the workplace. The demand for nurses is increasing in relation with an increasing population in Sweden and an increase in aging people in society. Despite an increase in issued nurse licenses, a majority of the regions in Sweden state that they are experiencing a shortage of nurses. The nursing shortage has a negative impact on nursing practice and patient safety. Previous research shows that nurses consider leaving their workplace multiple times per year.Aim: To describe factors that may influence nurses’ intention to leave their workplace in healthcare.Method: The result of the literature review is based on 15 scientific articles published between the years 2010 and 2020. The articles were found in the databases CINAHL and PubMed.Results: The results were divided into two main categories which were named Organizational factors and Individual factors. Furthermore, six subcategories were identified that were connected to the main categories.Conclusion: Nurses choose to leave their workplace due to several factors where an inadequate work environment is the main factor. Nurses experience a high workload in combination with understaffing in the workplace which leads to nurses choosing to leave, which in turn affects both patients and nurses. To avoid nurses choosing to leave their workplace it is important that they experience a good work environment, adequate management and a positive view of their profession.
409

Vad påverkar sjuksköterskors intention att stanna på sin arbetsplats? : En litteraturstudie / What affect nurses' intention to stay in their workplace? : A litterature review

Hammar, Olivia, Kollstedt, Gunnar January 2023 (has links)
Bakgrund: Idag beräknas bristen på sjuksköterskor uppgå till 5,9 miljoner sjuksköterskor globalt, ensiffra som väntas stiga. Att sjuksköterskor lämnar sina arbetsplatser beror på flera faktorer. Hög arbetsbelastning, etisk stress och bristande ledarskap är några exempel. Detta leder till brist på god omvårdnad och bristande patientsäkerhet.  Syfte: Syftet med studien var att undersöka vad som påverkar sjuksköterskors intention att stanna på sin arbetsplats.  Metod: En kvalitativ litteraturstudie baserad på data från 10 originalartiklar genomfördes, och analyserades med en tematisk innehållsanalys.  Resultat: Tre teman och åtta subteman identifierades. Individuella faktorer innehöll subteman: Privatliv, Klinisk erfarenhet och Ekonomiska faktorer. Det andra temat, Tillfredställelse i arbetet med subteman Professionsstolthet, omvårdnadsfokus och utmanande utveckling. Slutligen Mellanmänskliga relationer, vilken beskrev vikten av Omsorgsfullt ledarskap och Kollegial sammanhållning.  Slutsats: Sjuksköterskor behöver en stabil organisation och en miljö där de tillåts arbeta efter deras professionella autonomi, möjlighet till utveckling, ett gott ledarskap och goda relationer med kollegor. Vidare finns det likheter mellan sjuksköterskors intention att stanna och intentionen att lämna, men även viktiga skillnader. Ytterligare forskning kring detta samband förelsås. Detta för att bidra till god omvårdnad och en säker vård för patienterna. / Background: The global nursing shortage is estimated to 5,9 million nurses. Nurses are leaving their workplaces and the profession. This relates to several factors, for example, high workload, moral distress, and lack of good leadership which contributes to lack of proper nursing care and poor patient safety.   Aim: The aim of this study was to examine what affect nurses’ intention to stay in their workplace.  Method: A literature review of qualitative data was conducted from ten original articles, and was analysed using a qualitative thematic analysis approach.  Results: Three themes and eight subthemes were identified. Individual factors containing subthemes: personal life, clinical experience and financial factors. The second theme was Work satisfaction including subthemes professional pride, nursing care and challenging growth. The last theme was Interpersonal relationships describing the importance of caring leadership and collegial support.  Conclusion: Nurses´ need stable organisations, good leadership, collegial support and being allowed to use their expertise and professional autonomy. There are many similarities between nurses’ intention to stay and intention to leave, but also important differences. Further research investigating these differences are recommended to improve nurses’ work environment.
410

V2X Intention Sharing for E-bikes and E-scooters : Design and implementation of a vehicular network protocol for Vulnerable Road Users intention sharing.

Elfing, Johan, Pålsson, Joel January 2024 (has links)
Despite a steady decrease in fatality rates across European nations,Vulnerable Road User (VRU) continue to face significant risks in traffic incidents. Pedestrians, cyclists, and motorcyclists make up the majority of fatalities. Vision Zero sets a global standard for road safety,and its implementation complements broader European Union (EU)initiatives in prioritizing a zero-tolerance stance on road fatalities.This thesis underscores the transformative potential of VehicularAd hoc Networks (VANETs) by introducing a protocol to enhance roadsafety through intention sharing, particularly for micro-mobility vehicles such as E-bikes and E-scooters. By integrating this protocolwith Vehicle-to-Anything (V2X) technology, this thesis aims to redefine VRUs’ role in traffic safety from passive to active participants. Theprotocol aims to complement the quality of information and improving energy efficiency while maintaining safety metrics for cooperativetransportation systems. We achieved this by transmitting a reservedarea where the rider intends to be in the near future.Results from simulations demonstrate the efficacy of intention sharing in improving message reliability and efficiency compared to intention detection methods.While preliminary results show promise, further research is necessary to validate real-world applicability fully. Nonetheless, this thesiscontributes to the ongoing efforts to achieve Vision Zero by harnessing technological innovations to protect VRUs and create safer roadenvironments. / Trots en minskning av antalet dödsolyckor i europeiska länder fortsätter oskyddade trafikanter (VRU:er) att möta risker i trafiken. Fotgängare, cyklister och motorcyklister utgör majoriteten av dödsfall. Nollvisionen sätter en global standard för trafiksäkerhet, och dess implementering kompletterar bredare EU-initiativ som prioriterar nolltolerans mot dödsfall i trafiken. Denna avhandling understryker den transformativa potentialen hos Fordons ad-hoc-nätverk (VANETs) genom att introducera ett protokoll för att förbättra trafiksäkerheten genom delning av avsikter, särskilt för mikromobilitetsfordon såsom elcyklar och elsparkcyklar. Genom att integrera detta protokoll med Fordon till allt (V2X)-teknologi strävar detta arbete mot att omdefiniera VRU:ers roll i trafiksäkerhet från passiva till aktiva deltagare. Protokollet fungerar som så att den skickar meddelanden för VRU:ers intentioner till de andra deltagarna inom nätverket. Dessa meddelanden innehåller de framtida förutsägbara positionerna av VRU:n. Dessa positioner är sedan transformerade till en reserverad ellips där VRU:n kan tänkas befinna sig i framtiden.  Resultat från simuleringar visar effektiviteten i metoder som genom att dela avsikter förbättrar meddelandens pålitlighet och effektivitet i jämförelse med metoder som istället försöker detektera avsikter, vilket banar väg för säkrare transportsystem.  Det visade sig att tillförlitligheten bland meddelanden med intentioner var högre, störst skillnad var inom 100 meter från avsändaren. I denna grupp hade detekteringsmetoden en förlust av meddelanden på ungefär 20%, medans intentionsdelning endast hade en förlust på 5%. Dessutom var meddelandestorleken betydligt mindre, en minsking på 64%. De preliminära resultaten ser lovande ut, men vidare forskning är nödvändig för att fullt utvärdera den verkliga tillämpbarheten. Denna masteruppsats bidrar till den pågående eftersträvan att uppnå nollvisionen genom att utnyttja teknologiska innovationer för att skydda VRU:er genom samarbete och att skapa en säkrare trafikmiljö. Dessa resultat har potential att påverka standardiseringen på europeisk nivå och bana väg för framtidens mobilitet. / Trafikverket Skyltfonden 2023/104170

Page generated in 0.5658 seconds