216 research outputs found

    Toward more sustainable behavior : an investigation into the mobility responses to an involuntary workplace relocation of 10,000 employees in Montreal, Canada

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    Despite traffic congestion, air pollution, greenhouse gas emissions, as well as the connection to road crashes and physical inactivity, the car remains the prevalent mode of transport in North America. This over-reliance on cars relative to public and active transport modes is even more evident during peak hours. However, evidence suggests that the habit of car use is likely to be disrupted in important life-changing situations such as the birth of a child, or the relocation of a workplace. In such circumstances, attentiveness to alternative solutions and transport modes will increase, hence, a higher probability of a conscious (re)consideration of current travel behavior and a change is expected. From a policy planning perspective, these moments are highly valuable as they open up a “window of opportunity” for introducing and encouraging the use of sustainable transportation alternatives and for promoting health and environmental concerns. Whether it is voluntary or involuntary, uprooting and moving an activity to another location is a complex event from a socio-psychological perspective. It exposes people to a novel situation regarding geographical accessibility to home, work, amenities, transport services, parking, bike lanes, as well as other contextual characteristics including diversity of population and security, all of which can trigger the need for mobility rearrangement. Furthermore, relocation can stimulate travel behaviour change by influencing individual’s attitudes, values, and habits. In fact, modal choice is a very complex decision process determined by a wide range of spatial, economic, social, and psychological factors. In this context, a deeper understanding of individual’s daily travel behaviour and modal choices is necessary in order to take adequate policy measures to guide mobility towards more sustainable behaviors. In this context, this dissertation targets the travel behaviour of more than 10,000 employees of the McGill University Health Center (MUHC), Montreal, who experienced a significant life-changing event when five different work locations within the downtown core were merged into one peri-central location, the Glen Site, in 2015. One of the largest employment relocations in North American history, the super-hospital situated near the Vendome intermodal station is a strategic opportunity to advance basic knowledge on sustainable travel demand management. The underlying principle is to derive benefit from the disruption of habits and identifying the barriers of using low-carbon transport modes and to offer green transport opportunities in situations where there is increased attentiveness to alternative modes. Accordingly, this dissertation will answer the following research question: In an attempt to guide mobility towards a more sustainable future, how do the travel-related impacts of involuntary workplace relocation help improve our understanding of the choice of household’s daily mobility in metropolitan territory? To answer this question, the following objectives will be pursued through the production of three journal papers built on one another: 1. To develop a comprehensive presentation of modal choice determinants, and in particular factors affecting commuting behaviour during the process of workplace relocation as well as effective measures that incentivize sustainable commuting. 2. To examine the extent to which commute mode choice and satisfaction are interdependent by looking at socio-demographic characteristics, residential location and car ownership in the context of a major involuntary workplace relocation. 3. To expand our understanding of the complex causalities and rationales underlying travel-related choices and changes as well as their links to travel attitudes, dissonance and satisfaction. 4. To understand how individuals rank and prioritize their travel-related attitudes and values within the various domains of life in order to maximize their life satisfaction when experiencing a context change. Using both quantitative (n=1977, ~26% response rate) and qualitative (n=19) methods, we collected and analyzed data on before- and after-the-move decisions made by the employees regarding: 1) their travel patterns, 2) barriers of using low-carbon transport modes, and 3) the underlying rationales for change (or not). Whereas research in this field is dominated by quantitative analyses, few studies have applied mixed method approaches where a qualitative approach provides a deeper insight into the complex causal relationships between subjective psychological concepts that quantitative methods are often unable to address thoroughly. The overarching finding indicated that, while the existence of a regional train (in addition to metro and bus) at a major workplace has a positive impact on reducing private automobile use (15 percent increase in public transit use and 10 percent increase in travel satisfaction), the simple existence of alternatives is insufficient and further efforts are needed to encourage the use of low-carbon transport modes for daily commute. These efforts are most effective and functional if they are made at different stages during the process of the relocation, i.e., before, during, and after the relocation. The quantitative part also provided valuable insights into the importance of considering commuter’s travel-related characteristics (including home location, car ownership, and other socio-economic status) when planning for major workplace relocations. Furthermore, results from our in-depth interviews shed light on the concept of weighted decision-making by discussing how individuals maximize their (travel and life) satisfaction by attributing different value and attitudinal weights to their choice alternatives. The perspective of weighted decision-making helped improve understanding of that satisfaction in various travel-related domains are interdependent and each can affect or be affected by overall life satisfaction. Among the respondents, the majority of the relatively low-income households (e.g., service jobs) lived in areas with low accessibility to adequate public transit, whereas many high-income employees (e.g., doctors and specialists) lived in affluent transit-oriented residential neighbourhoods allowing them to commute by low-carbon transport modes compared to the former group who felt forced to commute by car or endure frustrating commutes with multiple transfers between lines. Moreover, the construction of motorway interchanges and the corresponding heavy congestion around the Glen site has resulted in commute dissatisfaction for drivers, bus users, bicyclists and even pedestrian commuters. This dissertation calls for the contribution of key urban-transportation planners to tackle commute challenges in an attempt to increase subjective well-being, work satisfaction, and quality of life and guide mobility towards a more sustainable future.Les embouteillages, le prix Ă©levĂ© des carburants, la pollution atmosphĂ©rique et la contribution importante des voitures individuelles aux Ă©missions de gaz Ă  effet de serre, aux accidents de la route et Ă  l’inactivitĂ© physique ne semblent pas troubler la grande majoritĂ© des propriĂ©taires de voitures des sociĂ©tĂ©s occidentales, car la voiture reste le mode de transport le plus utilisĂ©. Cette importante dĂ©pendance Ă  l’égard de la voiture par rapport aux modes de transport publics et actifs est encore plus Ă©vidente aux heures de pointe, lorsque les trajets domicile-travail impliquent une lourde charge sur les rĂ©seaux routiers et aux infrastructures. Or, la recherche a montrĂ© que l’habitude de l’utilisation d’une voiture individuelle est susceptible d’ĂȘtre perturbĂ©e lors de situations significatives qui changent le cours de la vie, comme la naissance d’un enfant ou le dĂ©placement d’un lieu de travail, type de situations qui est l’objet de cette thĂšse. Dans de telles circonstances, l’attention portĂ©e aux solutions et aux modes de transport alternatifs augmente, d’oĂč une plus grande probabilitĂ© de (re)considĂ©rer les comportements de dĂ©placement actuels et d’éventuellement les changer. Du point de vue de la planification des politiques, ces moments sont trĂšs prĂ©cieux, car ils ouvrent une « fenĂȘtre d’opportunitĂ© » pour introduire et encourager l’utilisation de solutions de transport durables et pour promouvoir les prĂ©occupations en matiĂšre de santĂ© et d’environnement. Qu’ils soient volontaires ou involontaires, le dĂ©racinement et le dĂ©placement d’une activitĂ© vers un autre lieu sont des Ă©vĂ©nements complexes d’un point de vue socio-psychologique. Cela expose les gens Ă  une situation nouvelle en ce qui concerne l’accessibilitĂ© gĂ©ographique au domicile, au travail, aux Ă©quipements urbains, aux services de transport, au stationnement, aux pistes cyclables ainsi qu’à d’autres dimensions contextuelles, notamment la diversitĂ© de la population et la sĂ©curitĂ©, ce qui peut alors dĂ©clencher le besoin de rĂ©amĂ©nager la mobilitĂ©. En outre, un dĂ©mĂ©nagement peut stimuler le changement de comportement en matiĂšre de dĂ©placement en influençant les attitudes, les valeurs et les habitudes des individus. En fait, le choix modal est un processus de dĂ©cision trĂšs complexe dĂ©terminĂ© par un large Ă©ventail de facteurs spatiaux, Ă©conomiques, sociaux et psychologiques. Dans ce contexte, il est pertinent de mieux comprendre le comportement quotidien des individus en matiĂšre de dĂ©placements et leurs choix modaux afin de prendre des mesures politiques adĂ©quates pour orienter la mobilitĂ© vers des comportements plus durables. Dans ce contexte, ce projet de recherche de doctorat s’intĂ©resse aux comportements de dĂ©placement de plus de 10 000 employĂ©s du Centre universitaire de santĂ© McGill (CUSM), Ă  MontrĂ©al, qui ont vĂ©cu en 2015 un Ă©vĂ©nement important qui a changĂ© leur vie lorsque quatre lieux de travail diffĂ©rents du centre-ville ont Ă©tĂ© fusionnĂ©s en un seul lieu pĂ©ricentral au site Glen. Ce super-hĂŽpital, situĂ© prĂšs de la gare intermodale VendĂŽme, est l’une des plus importantes dĂ©localisations d’emplois de l’histoire en AmĂ©rique du Nord. Il constitue une opportunitĂ© stratĂ©gique de faire progresser les connaissances fondamentales sur la gestion durable de la demande de transport. L’idĂ©e principale est de tirer profit de la rupture des habitudes et de l’identification des obstacles Ă  l’utilisation de modes de transport Ă  faible Ă©mission de carbone pour offrir des possibilitĂ©s de transport Ă©cologique dans des situations oĂč l’on est de plus en plus attentif aux modes alternatifs. En consĂ©quence, l’objectif principal de cette thĂšse est de contribuer Ă  la comprĂ©hension de la logique, de l’arbitrage et du choix de la mobilitĂ© des mĂ©nages sur le territoire mĂ©tropolitain, en rĂ©pondant Ă  la question de recherche suivante : dans le but d’orienter la mobilitĂ© vers une perspective plus durable, comment un dĂ©mĂ©nagement (involontaire) du lieu de travail contribue-t-il Ă  amĂ©liorer notre comprĂ©hension des (changements de) comportements de dĂ©placement des individus ? Pour rĂ©pondre Ă  cette question, les objectifs suivants sont visĂ©s grĂące Ă  la rĂ©alisation de trois articles scientifiques construits successivement : 1. DĂ©velopper une prĂ©sentation approfondie des dĂ©terminants du choix modal, et en particulier des facteurs affectant le comportement de dĂ©placement pendant le processus de dĂ©localisation du lieu de travail ainsi que des mesures efficaces qui incitent Ă  des dĂ©placements durables. 2. Examiner dans quelle mesure le choix du mode de transport et la satisfaction sont interdĂ©pendants en examinant les caractĂ©ristiques sociodĂ©mographiques, le lieu de rĂ©sidence et la possession d’une voiture dans le contexte d’une relocalisation involontaire du lieu d’emploi. 3. Élargir notre comprĂ©hension de causalitĂ© complexes qui sous-tendent les choix et les changements liĂ©s aux dĂ©placements, ainsi que leurs liens avec les attitudes, la dissonance et la satisfaction en matiĂšre de dĂ©placements. 4. Comprendre comment les individus classent et hiĂ©rarchisent leurs attitudes et valeurs liĂ©es aux dĂ©placements dans les divers domaines de la vie, afin de maximiser leur satisfaction dans la vie lorsqu'ils confrontĂ©s Ă  un changement de contexte. En utilisant des mĂ©thodes quantitatives (n=1977, taux de rĂ©ponse d’environ 26 %) et qualitatives (n=19), nous avons recueilli et analysĂ© des donnĂ©es sur les dĂ©cisions prises par les employĂ©s avant et aprĂšs la relocalisation : 1) leurs habitudes de dĂ©placement, 2) les obstacles Ă  l’utilisation de modes de transport Ă  faible Ă©mission de carbone et 3) les raisons sous-jacentes de tout changement (ou non). Alors que la recherche dans ce domaine est dominĂ©e par les analyses quantitatives, peu d’études ont appliquĂ© des approches de mĂ©thodes mixtes oĂč une enquĂȘte qualitative permet de mieux comprendre les relations causales complexes entre des concepts psychologiques subjectifs que les mĂ©thodes quantitatives souvent incapables d’aborder de maniĂšre approfondie. Le rĂ©sultat principal montre que, si l’existence d’un train de banlieue (en plus du mĂ©tro et du bus) vers le lieu de travail important a un impact positif sur la rĂ©duction de l’utilisation de l’automobile individuelle (augmentation de 15 % de l’utilisation des transports publics et de 10 % de la satisfaction des navettes quotidiennes), la simple existence d’une alternative Ă  la voiture est insuffisante et des efforts supplĂ©mentaires sont nĂ©cessaires pour encourager l’utilisation de modes de transport Ă  faible Ă©mission de carbone pour les trajets quotidiens. Ces efforts sont d’autant plus efficaces et effectifs lorsqu’ils sont dĂ©ployĂ©s Ă  diffĂ©rents stades du processus de relocalisation, c’est-Ă -dire avant, pendant et aprĂšs la relocalisation. La perspective quantitative a Ă©galement fourni des indications pertinentes sur l’importance de prendre en compte les caractĂ©ristiques des dĂ©placements des navetteurs (notamment le lieu de rĂ©sidence, la possession d’une voiture et d’autres statuts socio-Ă©conomiques) lors de la planification de relocalisations Ă  grande Ă©chelle de lieux d’emplois. En outre, les rĂ©sultats de nos entretiens approfondis de la perspective qualitative ont mis en lumiĂšre le concept de prise de dĂ©cision pondĂ©rĂ©e en examinant comment les individus maximisent leurs satisfactions (de mobilitĂ© et de la vie) en attribuant diffĂ©rentes valeurs et pondĂ©rations attitudinales Ă  leurs choix. La perspective de la prise de dĂ©cision pondĂ©rĂ©e a permis de mieux comprendre comment la satisfaction dans divers domaines liĂ©s aux navettes est interdĂ©pendante et que chacun des domaines peut affecter ou ĂȘtre affectĂ© par la satisfaction globale de la vie. Parmi les rĂ©pondants, la majoritĂ© des mĂ©nages Ă  faible revenu relatif (par exemple, les emplois de services) vivaient dans des zones peu accessibles aux transports en commun, tandis que de nombreux employĂ©s Ă  revenu Ă©levĂ© (par exemple, les mĂ©decins et les spĂ©cialistes) vivaient dans des quartiers rĂ©sidentiels favorisĂ©s et orientĂ©s vers les transports en commun, ce qui leur permettait de se dĂ©placer par des modes de transport Ă  faible Ă©mission de carbone, alors que le premier groupe se considĂ©rait obligĂ© de se dĂ©placer en voiture ou d’endurer des dĂ©placements frustrants avec des correspondances multiples. En outre, la construction d’échangeurs autoroutiers et la forte congestion autour du site de Glen ont entraĂźnĂ© une insatisfaction des conducteurs, des utilisateurs de bus, des cyclistes et mĂȘme des piĂ©tons. Cet enjeu a eu une influence nĂ©gative sur la satisfaction au travail et la qualitĂ© de vie des employĂ©s. Ce projet de doctorat souligne ainsi le rĂŽle clĂ© des principaux planificateurs des transports urbains pour relever les dĂ©fis liĂ©s aux dĂ©placements afin d’accroĂźtre le bien-ĂȘtre subjectif et d’orienter la mobilitĂ© vers un avenir plus durable

    UTI in Children

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    Urban sprawl pattern and effective factors on them: the case of Urmia city, Iran

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    Urban sprawl has become a remarkable characteristic of urban development worldwide in the last decades. Urban sprawl refers to the extent of urbanization, which is a global phenomenon mainly driven by population growth and large scale migration. In developing countries like Iran, urban sprawl is taking its toll on the natural resources at an alarming pace. The purpose of this paper is to study urban growth and effective factors on them in the city of Urmia, Iran. We used quantitive data of the study area from the period between 1989 and 2007, and population censuses of Urmia. To measure the model of urban growth, Holderness and Shannon’s entropy were employed. The Urmia case is interesting for several reasons: first, it is a case of very fast urban growth even for a developing country; second, it illustrates how the fastest rates of urban sprawl may correspond to middle size cities rather than to large centers. Third, it portrays a land substitution process in which agricultural land is not the primary provider of urban land which is relatively rare in urban contexts, and fourth, it also illustrates how urban sprawl may also hide important internal land uses such as the presence of agricultural plots within urban boundaries

    Design and Development of a Self-contained and Non-Invasive Integrated System for Electricity Monitoring Applications

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    Growing interest in improving the energy consumption efficiency in residential and commercial buildings has led to the emergence of intelligent energy management systems. This growing technology allows the transformation of the outdated electric distribution network within buildings to a smart and intelligent system. A major challenge in the development of such infrastructure is the need for low cost, integrated, self-contained, and non-invasive wireless sensor nodes. While an electric meter provides the utility company with information regarding the total energy consumption, no information is provided to the consumers regarding the energy consumed by individual appliances. Such visibility can provide consumers with the ability to better control and manage their energy usage leading to a reduced overall energy consumption. This work explores the design and development of a self-contained and non-invasive integrated system intended for real-time electricity monitoring within residential and commercial buildings. The proposed system includes an Energy Harvester, an electric current sensor, a Micro-controller Unit, and a wireless communication device. The proposed system is self-powered and non-invasive, which offers a promising solution in providing real time information regarding the energy distribution within buildings. The design featured in this work provides an innovative approach in the development of a customized interface circuitry that is designed to collect and regulate the energy from the Energy Harvester. The entire sensor node will operate under a power budget in the range of microwatts collected by the Energy Harvester. A Wireless MCU is programmed to acquire, process, and transmit the data from the sensor to the central hub via Bluetooth Low Energy connectivity. The real-time data transmitted to the central hub provides detailed information regarding the energy consumed by individual appliances within the building

    Biological traits and life table parameters A and B biotype of Bemisia tabaci (Genn.) on cotton and rapeseed

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    The aim of this work was to construct life table of Bemisia tabaci (Gen.) A and B (silverleaf whitefly B. argentifolii Bellows and Perring) biotype (Hem.: Aleyrodidae) on two host plants; cotton, (Gossypium hirsutum L.) and rapeseed, (Brassica napus L.). Experiments were conducted in a growth chamber under 24 ± 2ÂșC, 55±3% RH and 16:8 (L:D) h photoperiod on caged plants of cotton G. hirsutum L. (Varamin 76 variety) and rapeseed B. napus L. (global variety. The intrinsic rate of natural increase (rm), net reproductive rate (R0) and mean generation time (T) for B. tabaci A biotype was 0.1010 females per female per day, 18.4075 females per female and 30.079 day (d) on cotton; 0.1286, 30.6760 and 26.77 d on rapeseed; and for B biotype (B. argentifolii) those above respective parameters averaged 0.1033, 27.8426 and 32.74 d on cotton and 0.1750, 40.75 and 21.27 d on rapeseed. The total survival of A and B biotype from the egg to adult on cotton was 22.08 and 22.25, respectively. The results showed significant differences between the two biotype reared on either host plant for gross reproductive rate (GRR), net reproductive rate (R0 or NRR), intrinsic rates of increase (rm), finite rate of increase (λ), doubling time (DT) and mean generation times (Tc). To obtain a better understanding of the biology of these biotypes, Stable age distribution (Cx) and some other aspects of life history related to their hosts were also studied. Based upon the results, both biotypes showed a greater reproduction capacity on rapeseed than on cotton. Thus, rapeseed was more suitable host than cotton for two biotypes and this was an important factor in host plant selection for optimizing the control strategies of these major pests.Mohammad Amin Samih, Mehdi Zarabi, Maryam Yazdani and Mohammad Rouhani

    Storing, caring and sharing : examining organisational practices around material stuff in the home

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    Homes are a much discussed, but little empirically examined resource for action. Material stuff at home offer resources for social, organisational and individual activities that we routinely encounter and use on an everyday basis. Yet their purposes, storing and sharing practices of use and roles in social and organisational actions are hardly touched upon within Human Computer Interaction (HCI) and Computer Supported Cooperative Work (CSCW) academic literature. As a consequence of this, there are critical gaps in understanding home organisation and management methods as a means of informing the design of novel technologies. This thesis is an examination of everyday routines in home, paying particular attention to tidying, storing, retrieving and sharing practices. To examine these practices at home, this thesis presents a combination of two qualitative studies using ethnographically oriented methods. Study one (Home’s Tidying up, Storing and Retrieving) concerns the topic of home storage in practice; investigating how householders create and use domestic storage practices and the methods used to manage their storage at home. Study two (Social Interaction around Shared Resources) concerns social interaction around shared resources, and the methods used to manage sharing practices at home. Semi-structured interviews, fieldwork observation, tour around a home, and a photo diary were undertaken to produce a ‘rich’ description of how householders collaborate in storing and sharing set of practices to manage their everyday routines. Several key finding emerged from the research, that are used to identify important implications for design of home organisational technologies, for example to support effective lightweight interactions, providing user controlled mechanism to make different levels of privacy protection for family members, offering effective awareness of family communications and notifications of the activities of other people around these organisation systems, and making available a range of flexible options for family members to access a shared resource. The thesis make the case that flexible systems should be designed allowing people to categorise things in different ways, and have the values of home asserted in technologies, considering factors such as emotion around the use of space in home organisation to make homes become the unique places that they are understood to be.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
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