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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.
1

Community 2.0 ; governance and engagement in community development

McInnis, Norman 13 August 2013 (has links)
The Olds Institute for Community and Regional Development (OICRD) Board of Directors is challenged to continue to provide the governance to allow the committee work that is occurring to continue and improve. This inquiry asked; how can shifting the governance model in the OICRD improve community engagement with sustainability planning and implementation? The research engaged the past chairs, current executive, essential member boards and committee members using an Organizational Action Research (OAR) methodology and focus group and survey research methods to complete the readiness for change cycle of the OAR model. The results illustrate that the four organizations that constitute the OICRD need to rediscover their interdependence and re-focus relationships between the four and the OICRD committees. The OICRD must build the physical and virtual infrastructure to engage members in order to generate meaningful possibilities, and employ new action research practices to move possibilities to action, report and celebrate successes.
2

Energy Sustainable Reinforcement Learning-based Adaptive Duty-Cycling in Wireless Sensor Networks-based Internet of Things Networks

Charef, Nadia January 2023 (has links)
The Internet of Things (IoT) is widely adopted across various fields due to its flexibility and low cost. Energy-harvesting Wireless Sensor Networks (WSNs) are becoming a building block of many IoT applications and provide a perpetual source of energy to power energy-constrained IoT devices. However, the dynamic and stochastic nature of the available harvested energy drives the need for adaptive energy management solutions. Duty cycling is among the most prominent adaptive approaches that help consolidate the effort of energy management solutions at the routing and application layers to ensure energy sustainability and, hence, continuous network operation.  The IEEE 802.15.4 standard defines the physical layer and the Medium Access Control (MAC) sub-layer of low-data-rate wireless devices with limited energy consumption requirements. The MAC sub-layer’s functionalities include the scheduling of the duty cycle of individual devices. However, the scheduling of the duty cycle is left open to the industry. Various computational mechanisms are used to compute the duty cycle of IoT nodes to ensure optimal performance in energy sustainability and Quality of Service (QoS). Reinforcement Learning (RL) is the most employed mechanism in this context.  The literature depicts various RL-based solutions to adjust the duty cycle of IoT devices to adapt to changes in the IoT environment. However, these solutions are usually tailored to specific scenarios or focus mainly on one aspect of the problem, namely QoS performance or energy limitation. This work proposes a generic adaptive duty cycling solution and evaluates its performance under different energy generation and traffic conditions. Moreover, it emphasizes the energy sustainability aspect while taking the QoS performance into account.  While different approaches exist to achieve energy sustainability, Energy Neutral Operation (ENO)-based solutions provide the most prominent approach to ensure energy-sustainable performance. Nevertheless, these approaches do not necessarily guarantee optimal performance in QoS. This work adopts a Markov Decision Process (MDP) model from the literature that aims to minimize the distance from energy neutrality given the energy harvesting and ENO conditions. We introduce QoS penalties to the reward formulation to improve QoS performance.  We start by examining the performance in QoS against the benchmarking solution. Then, we analyze the performance using different energy harvesting and consumption profiles to further assess QoS performance and determine if energy sustainability is still maintained under different conditions. The results prove more efficient utilization of harvested energy when available in abundance. However, one limitation to our solution occurs when energy demand is high, or harvested energy is scarce. In such cases, we observe degradation in QoS due to IoT nodes adopting a low-duty cycle to avoid energy depletion. We further study the effect this limitation has on the solution's scalability. We also attempt to address this problem by assessing the performance using a routing solution that balances load distribution and, hence, energy demand across the network.

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