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  • 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.
51

Σχεδιασμός και ανάπτυξη πλατφόρμας συστήματος για την υποστήριξη μιας σύγχρονης πολυχρηστικής εικονικής αίθουσας διάθεσης και αξιοποίησης υπηρεσιών δικτύου

Κουμούτσος, Γιάννης 16 April 2013 (has links)
Σε αυτή τη διατριβή προτείνεται ένα πρωτότυπο πλαίσιο το οποίο απελευθερώνει τους κινητούς χρήστες από προκαθορισμένα, μακράς διάρκειας συμβόλαια. Ο κύριος στόχος μας ήταν η δημιουργία ενός ενοποιημένου πλαισίου το οποίο θα μπορεί να ενταχθεί στα υπάρχοντα δίκτυα και τεχνολογίες παρέχοντας μια ολοκληρωμένη λύση για την αυτοματοποιημένη απόκτηση υπηρεσιών διαδικτύου. Η παρούσα διατριβή εστιάζει σε δύο σημαντικά θέματα διαδικτύωσης που είναι η αυτοματοποιημένη διαπραγμάτευση και η συνεργασία μεταξύ των παρόχων. Δίνοντας έμφαση στον αυτοματισμό έχει σχεδιαστεί και υλοποιηθεί ένα εξελιγμένο πλαίσιο για την απόκτηση υπηρεσίας που επιτρέπει στους τελικούς χρήστες, ακόμα και σε αυτούς που έχουν ελάχιστες γνώσεις για την λειτουργία του διαδικτύου, να αναζητήσουν προσβάσιμες υπηρεσίες, δίκτυα και παρόχους που βρίσκονται στην γεωγραφική τους θέση και να διεξάγουν αυτοματοποιημένες διαπραγματεύσεις με τους παρόχους. Η διαδικασία διαπραγμάτευσης μπορεί να διεξαχθεί είτε άμεσα με κάθε πάροχο που ανιχνεύεται στην γεωγραφική θέση του χρήστη είτε μέσω ενός μεσολαβητή υπηρεσιών. Ένα εξίσου σημαντικό ζήτημα σχετικά με την παροχή υπηρεσίας στους τελικούς χρήστες είναι η συνεργασία μεταξύ των παρόχων. Με τον όρο πάροχος αναφερόμαστε και στους παρόχους δικτυακής πρόσβασης (Internet Access Providers - IAPs) και στους παρόχους υπηρεσιών διαδικτύου (Internet Service Providers - ISPs). Το προτεινόμενο πλαίσιο διαπραγμάτευσης παρέχει την απαραίτητη υποδομή για την συνεργασία μεταξύ των IAPs και των ISPs ώστε να παρέχουν αυτήν την διαφάνεια στον τελικό χρήστη. Μια πρωτότυπη προσέγγιση για τον προσδιορισμό και την εκτέλεση του πρωτοκόλλου διαπραγμάτευσης σε συνδυασμό με την στρατηγική και τις προτιμήσεις του χρήστη παρουσιάζεται. Ο σχεδιασμός και η λειτουργία του συστήματος διαπραγμάτευσης βασίζεται στον συνδυασμό του πρόσθιου με τον οπίσθια κινούμενο συμπερασματικό λογισμό (forward and backward reasoning). Επιπλέον περιγράφεται μια πρότυπη υλοποίηση του πλαισίου δυναμικής απόκτησης υπηρεσίας πρόσβασης που χρησιμοποιήθηκε για την διενέργεια μετρήσεων, σε πραγματικές συνθήκες, σχετικά με τον χρόνο που απαιτείται για την ολοκλήρωση των διαπραγματεύσεων και την απόκτηση της υπηρεσίας πρόσβασης. Τα αποτελέσματα που παρουσιάζονται και αναλύονται αποδεικνύουν την δυνατότητα εφαρμογής του προτεινόμενου πλαισίου απόκτησης υπηρεσίας και τα πλεονεκτήματα του σε σχέση με υπάρχουσες λύσεις. / In this thesis, a novel framework, which liberates mobile users from predefined, long-term contracts, is presented. This framework enables mobile users to dynamically acquire any kind of Internet Service, irrespectively of their location and the mobile device used. Our main objective was to create a unified framework which will be easily adopted by existing networks and technologies, imposing little or no restrictions, and provide a complete solution, agnostic to networks, technologies or administrative domains. The thesis focuses on two key networking issues, namely the service negotiation and the inter-provider cooperation, towards a fully automated service acquisition process. Emphasizing on automation, we have designed and implemented a sophisticated service acquisition framework which enables mobile users to search for accessible services, networks, providers, etc. located at their current geographical position and conduct automated negotiations with the providers. The negotiation process can be conducted either directly with any provider scanned in the user’s geographical position, or indirectly with a Service Request Broker (SRB). Through this framework, providers are able to receive incoming requests from new clients, without having any predefined contract with them. Another equally important issue towards service delivery to end-users is the cooperation between providers. With the term provider we refer to both Internet Access Providers (IAPs) and Internet Services Providers (ISPs). The proposed Negotiation Framework provides the necessary infrastructure that enables the cooperation of IAPs and ISPs in order to provide this transparency to the end-user. A novel approach for the specification and execution of the negotiation protocol in combination with the negotiation Strategy and users preferences is presented, based on declarative programming and forward and backward reasoning techniques. The flexible communication and negotiation framework that was defined enables automated negotiations between all parties and can be used as basis towards automated service acquisition for mobile users in Future Internet. A prototype implementation of the service acquisition framework that is based on the e-negotiations framework is also presented. Using this prototype we run some evaluation tests measuring the time needed for different service acquisition scenarios. The results prove the applicability of the framework as compared with similar approaches.
52

Famílias negras no planalto médio do Rio Grande do Sul (1940-1960) : terra, migração e relações familiares

Aguilar, Maria do Carmo Moreira January 2012 (has links)
O objetivo central desta pesquisa é analisar o período de itinerância de um grupo familiar residente no quilombo Rincão dos Caixões, localizado no município de Jacuízinho, situado no Planalto Médio do Rio Grande do Sul. Ao abordar a questão das migrações, verificaram-se as estratégias desenvolvidas pelo grupo na busca por postos de trabalho, a recuperação da estabilidade perdida e as relações familiares tecidas neste contexto de constantes deslocamentos. Esta coletividade tem sua origem em outro território negro, denominado Sítio Novo/Linha Fão, localizado no município de Arroio do Tigre. Esta área foi cedida a um grupo negro nos anos iniciais do século XX, porém, seus ancestrais habitavam a localidade desde os tempos do cativeiro. A delimitação temporal focaliza-se entre meados de 1940, momento da perda de parte do território do Sítio Novo/Linha Fão e 1960 quando a família se fixou na área do quilombo Rincão dos Caixões. O período delimitado, no entanto, recua para o período final da escravidão (1870-1890) para reconstituir o contexto de territorialidades negras na região em questão, na época da doação da parcela de terras, marcando com isso o inicio da territorialização negra no quilombo Sítio Novo/Linha Fão. A pesquisa desenvolvida se utilizou de fontes orais e escritas. Conta com um acervo de 30 entrevistas, realizadas entre 2008 e 2011, e, através de testamentos, inventários post-mortem, e processos criminais, buscou-se reconstituir aspectos das experiências de famílias de escravos e libertos na localidade em questão. / The main objective of this research is to analyze the roaming period of a family group living in the Quilombo of Rincão dos Caixões, located in the municipality of Jacuízinho, situated in the middle plateau region of Rio Grande do Sul. When addressing the issue of migration, we also verified the strategy used by the group regarding search of jobs, restoring lost stability and family relations built in this context of constant displacement. The community has its origin in another black territory, called Sítio Novo / Linha Fão, located in the municipality of Arroio do Tigre. This area was given to a group of black people in the early years of the 20th Century; however, their ancestors inhabited the place since the days of captivity. The temporal delimitation focuses from mid-1940, when it was the loss of part of the territory of Sítio Novo / Linha Fão and 1960 when the family settled in the Quilombo area Rincão dos Caixões. To better reconstruct the context of black territoriality in that region at the time of donation of the part of land, we bounded the stage until the final period of slavery (1870- 1890). That period was the beginning of black territorialization in the Quilombo Novo Sítio/Fão. Oral and written sources were used in the present research. It comprises a collection of 30 interviews, conducted between 2008 and 2011. Through wills, postmortem inventories, and criminal cases, we tried to reconstruct aspects of slaves and freedmen families, and their experiences in the locality in question.
53

Famílias negras no planalto médio do Rio Grande do Sul (1940-1960) : terra, migração e relações familiares

Aguilar, Maria do Carmo Moreira January 2012 (has links)
O objetivo central desta pesquisa é analisar o período de itinerância de um grupo familiar residente no quilombo Rincão dos Caixões, localizado no município de Jacuízinho, situado no Planalto Médio do Rio Grande do Sul. Ao abordar a questão das migrações, verificaram-se as estratégias desenvolvidas pelo grupo na busca por postos de trabalho, a recuperação da estabilidade perdida e as relações familiares tecidas neste contexto de constantes deslocamentos. Esta coletividade tem sua origem em outro território negro, denominado Sítio Novo/Linha Fão, localizado no município de Arroio do Tigre. Esta área foi cedida a um grupo negro nos anos iniciais do século XX, porém, seus ancestrais habitavam a localidade desde os tempos do cativeiro. A delimitação temporal focaliza-se entre meados de 1940, momento da perda de parte do território do Sítio Novo/Linha Fão e 1960 quando a família se fixou na área do quilombo Rincão dos Caixões. O período delimitado, no entanto, recua para o período final da escravidão (1870-1890) para reconstituir o contexto de territorialidades negras na região em questão, na época da doação da parcela de terras, marcando com isso o inicio da territorialização negra no quilombo Sítio Novo/Linha Fão. A pesquisa desenvolvida se utilizou de fontes orais e escritas. Conta com um acervo de 30 entrevistas, realizadas entre 2008 e 2011, e, através de testamentos, inventários post-mortem, e processos criminais, buscou-se reconstituir aspectos das experiências de famílias de escravos e libertos na localidade em questão. / The main objective of this research is to analyze the roaming period of a family group living in the Quilombo of Rincão dos Caixões, located in the municipality of Jacuízinho, situated in the middle plateau region of Rio Grande do Sul. When addressing the issue of migration, we also verified the strategy used by the group regarding search of jobs, restoring lost stability and family relations built in this context of constant displacement. The community has its origin in another black territory, called Sítio Novo / Linha Fão, located in the municipality of Arroio do Tigre. This area was given to a group of black people in the early years of the 20th Century; however, their ancestors inhabited the place since the days of captivity. The temporal delimitation focuses from mid-1940, when it was the loss of part of the territory of Sítio Novo / Linha Fão and 1960 when the family settled in the Quilombo area Rincão dos Caixões. To better reconstruct the context of black territoriality in that region at the time of donation of the part of land, we bounded the stage until the final period of slavery (1870- 1890). That period was the beginning of black territorialization in the Quilombo Novo Sítio/Fão. Oral and written sources were used in the present research. It comprises a collection of 30 interviews, conducted between 2008 and 2011. Through wills, postmortem inventories, and criminal cases, we tried to reconstruct aspects of slaves and freedmen families, and their experiences in the locality in question.
54

Famílias negras no planalto médio do Rio Grande do Sul (1940-1960) : terra, migração e relações familiares

Aguilar, Maria do Carmo Moreira January 2012 (has links)
O objetivo central desta pesquisa é analisar o período de itinerância de um grupo familiar residente no quilombo Rincão dos Caixões, localizado no município de Jacuízinho, situado no Planalto Médio do Rio Grande do Sul. Ao abordar a questão das migrações, verificaram-se as estratégias desenvolvidas pelo grupo na busca por postos de trabalho, a recuperação da estabilidade perdida e as relações familiares tecidas neste contexto de constantes deslocamentos. Esta coletividade tem sua origem em outro território negro, denominado Sítio Novo/Linha Fão, localizado no município de Arroio do Tigre. Esta área foi cedida a um grupo negro nos anos iniciais do século XX, porém, seus ancestrais habitavam a localidade desde os tempos do cativeiro. A delimitação temporal focaliza-se entre meados de 1940, momento da perda de parte do território do Sítio Novo/Linha Fão e 1960 quando a família se fixou na área do quilombo Rincão dos Caixões. O período delimitado, no entanto, recua para o período final da escravidão (1870-1890) para reconstituir o contexto de territorialidades negras na região em questão, na época da doação da parcela de terras, marcando com isso o inicio da territorialização negra no quilombo Sítio Novo/Linha Fão. A pesquisa desenvolvida se utilizou de fontes orais e escritas. Conta com um acervo de 30 entrevistas, realizadas entre 2008 e 2011, e, através de testamentos, inventários post-mortem, e processos criminais, buscou-se reconstituir aspectos das experiências de famílias de escravos e libertos na localidade em questão. / The main objective of this research is to analyze the roaming period of a family group living in the Quilombo of Rincão dos Caixões, located in the municipality of Jacuízinho, situated in the middle plateau region of Rio Grande do Sul. When addressing the issue of migration, we also verified the strategy used by the group regarding search of jobs, restoring lost stability and family relations built in this context of constant displacement. The community has its origin in another black territory, called Sítio Novo / Linha Fão, located in the municipality of Arroio do Tigre. This area was given to a group of black people in the early years of the 20th Century; however, their ancestors inhabited the place since the days of captivity. The temporal delimitation focuses from mid-1940, when it was the loss of part of the territory of Sítio Novo / Linha Fão and 1960 when the family settled in the Quilombo area Rincão dos Caixões. To better reconstruct the context of black territoriality in that region at the time of donation of the part of land, we bounded the stage until the final period of slavery (1870- 1890). That period was the beginning of black territorialization in the Quilombo Novo Sítio/Fão. Oral and written sources were used in the present research. It comprises a collection of 30 interviews, conducted between 2008 and 2011. Through wills, postmortem inventories, and criminal cases, we tried to reconstruct aspects of slaves and freedmen families, and their experiences in the locality in question.
55

RESERVATION DOGS: OCCUPANCY, COMMUNITY BELIEFS, AND LAKOTA WAYS OF KNOWING

Camille L Griffith (14227979) 08 December 2022 (has links)
<p>  </p> <p>Free-roaming dogs on Native American Reservations are called rez dogs on the Pine Ridge Indian Reservation, SD. Understanding the human-rez dog relationship is needed to develop best management practices. As a member of the Oglala Lakota nation and a resident of the Pine Ridge Indian Reservation, I used a combination of western scientific methods and Lakota ways of knowing to research how rez dogs are related to their human caretakers on the Pine Ridge Reservation. First, I determined how they are related to humans spatially. To do this, I installed trail cameras at 73 sites distributed within four zones around six communities on the Pine Ridge Reservation. I analyzed presence-absence and count data to estimate how human habitat covariates influenced rez dog occurrence and abundance. My results show that rez dog occupancy and abundance is related to human habitation and emphasizes the importance of considering human caretakers when developing best management practices. To investigate how human caretakers may perceive rez dogs and current management practices on the Pine Ridge Reservation, I used semi-structured questionnaires. I distributed surveys to 107 residents at grocery stores and convenience stores within five towns. The survey assessed the communities' perceptions of rez dog overpopulation, and topics related to their attitude toward dogs overall and rez dog sterilization programs. I used ordinal regression to determine if community member demographics, the number of people and dogs in the household, and distance to the veterinary clinic influenced these variables. My results show community members support rez dog sterilization programs and that policymakers should focus on free or low-cost sterilization programs for ambiguously owned rez dogs in conjunction with owned dogs. In addition, these results highlight how the economic disparity and lack of culturally appropriate methods of rez-dog population control prevent effective management of rez dogs. This dynamic is one example of how the settler-colonialism structure continues to negatively impact Native American communities and prevent effective, efficient, and ethical ways to manage rez dogs. I describe how the Lakota ways of knowing can be used to develop best management practices for rez dogs that are culturally appropriate. I describe the seven Lakota values, lessons learned from the Lakota dog creation story, and approaches to Lakota research methodologies. This paper introduces an example of a seven-generation, One Health framework that implements Lakota ways of knowing to establish rez dog management and centers community values, beginning generational healing through <em>Shunka </em>(dog) caretaking. In conclusion, this research describes how rez dogs are related to us spatially, by occupying the same area as us, and how we are related within a social context, with dogs being an indicator of our own well-being as humans. </p>
56

Interactions spatiales et temporelles entre les chiens libres et les carnivores sauvages à proximité des villages nordiques du Nunavik dans un contexte de transmission d’une maladie zoonotique : la rage

Frenette, Marie-Christine 04 1900 (has links)
Dans l'Arctique, le risque de transmission de maladies zoonotiques comme la rage est encore une préoccupation pour la santé publique, avec plusieurs cas rapportés chaque année chez différentes espèces animales. L’interface entre la faune sauvage, les animaux domestiques et les humains pour la transmission de maladies sera en augmentation en raison des pressions grandissantes du développement anthropique et du réchauffement climatique. Les interactions directes entre les chiens domestiques des villages nordiques et les renards sauvages, les principales sources d’exposition à la rage, sont des évènements critiques pour l’exposition des humains au virus, mais très peu d’études se sont attardées à ce sujet. Les objectifs de ce projet sont 1- de décrire et de quantifier l’activité spatiale et temporelle des renards et des chiens libres et d’identifier les facteurs anthropiques et environnementaux qui influencent leur présence à proximité et dans les villages nordiques, 2- de quantifier les contacts directs et le potentiel d’interactions entre les renards et les chiens libres afin de mieux identifier les périodes et les zones avec un risque de transmission de la rage, 3- de comparer et discuter des résultats de l’activité des renards et des chiens libres et leur potentiel d’interactions entre les deux villages nordiques à l’étude et 4- d’identifier des méthodes de gestion pour diminuer les opportunités d’interactions entre les renards et les chiens libres. Afin de détecter la présence des deux carnivores, un réseau de caméras automatiques a été installé sur une grille spatiale autour et à l’intérieur de deux villages typiques du Nord, Kuujjuaq (près de la limite des arbres) et Inukjuak (à > 100 km de la limite des arbres). Pour chaque station caméra, différents facteurs anthropiques et environnementaux ont été évalués (distance au dépotoir, distance à l’aéroport, densité d’habitations, densité de chiens de traîneau, distance aux rues, distance à l’eau, indice de végétation). Les contacts directs et les indices d’interaction ont été calculés pour évaluer le potentiel d’interactions entre les renards et les chiens libres. Les opportunités d’interactions entre les renards et les chiens sont plus élevées à l’aube et au crépuscule pendant les mois d'octobre et de novembre en périphérie des deux villages, particulièrement près des chiens de traîneau et légèrement près du dépotoir municipal (KU) et de l’aéroport (IN). Les renards roux et les renards arctiques ont été observés à proximité et dans les deux villages, mais les renards roux sont plus souvent observés à Kuujjuaq (87% des observations) qu’à Inukjuak (renards arctiques : 74% des observations), ce qui reflète également des particularités biotiques et abiotiques uniques à chaque village. Les résultats suggèrent que les opportunités d’interactions entre les renards et les chiens représentent un risque d’exposition à la rage pour les chiens et les humains, et possiblement pour d’autres pathogènes nordiques transmissibles entre les chiens et la faune. Cependant, les évènements de contacts directs interspécifiques renard-chien sont rares et les opportunités d’interactions sont concentrées dans le temps et dans des zones restreintes, ce qui peut aider à cibler des mesures préventives visant à limiter les évènements de transmission. Cette étude fournit la première documentation sur l'activité des renards et leurs interactions avec les chiens libres dans les villages de l'Arctique. L’application d’une approche « Une seule Santé » devrait être utilisée pour prévenir ou diminuer le risque de transmission de la rage entre les renards et les chiens. / In the Arctic, the risk of transmission of zoonotic diseases like rabies is still a public health concern, with several cases reported each year in different animal species. The interface between wildlife, domestic animals and humans for disease transmission will be increasing due to pressures from anthropogenic development and global warming. Direct interactions between domestic dogs in northern communities and wild foxes, the main source of rabies exposure, are critical of human exposure to the virus, but very few studies have focused on this. The objectives of this project are 1- to describe and quantify the spatial and temporal activity of free-ranging dogs and foxes, and identify the anthropogenic and environmental factors that influence their presence near and within northern villages, 2- to quantify direct contacts and the potential for interactions between free-ranging dogs and foxes in order to better identify periods and areas of higher risk of rabies transmission, 3- to compare and contrast dog-fox activity and interactions between the two northern villages under study, and 4- to identify management methods to reduce opportunities for fox-dog interactions. To detect the presence of the two carnivores, we set up a network of automatic cameras near and within two typical northern villages, i.e., Kuujjuaq (near the tree line) and Inukjuak (> 100 km from the tree line). For each camera, different anthropogenic and environmental factors were evaluated (distance to the landfill, distance to the airport, density of dwellings, density of sled dogs, distance to streets, distance to water, vegetation index). Direct contacts and interaction index were calculated to assess the potential for interactions between foxes and free-roaming dogs. Interaction opportunities between foxes and dogs are more likely to occur at dawn and dusk during the months of October and November, and on the outskirts of both villages, particularly near sled dogs and slightly nearer to the landfill (KU) and the airport (IN). Red and Arctic foxes were observed in and around both villages, but red foxes were more frequently observed in Kuujjuaq (87% of observations) while Arctic foxes were more frequent in Inukjuak (74% of observations), which also reflects the biotic and abiotic particularities specific to each village. These results suggest that fox-dog contacts around and within the village are likely, posing a real risk of peri-domestic rabies transmission to dogs and humans, and possibly for other northern pathogens transmissible between wildlife and dogs. Nevertheless, interspecific direct contact events are rare and interaction opportunities are concentrated in time and space, which may help target preventive measures aimed at limiting transmission events. This study provides the first documentation on the activity of foxes and their interactions with dogs and humans in Arctic communities. Considering the potential risk-by-proximity described in our study, a “One Health” approach could be applied to prevent or lower fox-dog rabies transmission.
57

Disease Control through Fertility Control: Explorations in Two Urban Systems

Yoak, Andrew James 27 August 2015 (has links)
No description available.
58

TU-Spektrum 2/2004, Magazin der Technischen Universität Chemnitz

Steinebach, Mario, Friebel, Alexander, Häckel-Riffler, Christine, Tzschucke, Volker, Pollmer, Caroline, Horst, Gabriela, Brabandt, Antje, Reichold, Kathrin 15 December 2004 (has links) (PDF)
zweimal im Jahr erscheinende Zeitschrift über aktuelle Themen der TU Chemnitz, ergänzt von Sonderheft(en)
59

TU-Spektrum 2/2004, Magazin der Technischen Universität Chemnitz

Steinebach, Mario, Friebel, Alexander, Häckel-Riffler, Christine, Tzschucke, Volker, Pollmer, Caroline, Horst, Gabriela, Brabandt, Antje, Reichold, Kathrin 15 December 2004 (has links)
zweimal im Jahr erscheinende Zeitschrift über aktuelle Themen der TU Chemnitz, ergänzt von Sonderheft(en)

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