Advancing Social Change by Synergizing Nonprofit Organizations with Common Missions

The aim of this study is to advance the efforts of nonprofit organizations in achieving their missions. In the form of a case study, the paper discusses how this can be achieved by bringing together the resources of different nonprofit and for profit organizations that serve a common cause/mission. An endeavor is made for helping an eye care charity organization by impacting it in both a positive and sustainable manner. The effort reaches to various organizations related to eye healthcare in order to seek out the common cause they all are working for. It is found out that the more closely related the missions of the organizations are the stronger and more effective will be the resultant synergies of their collaboration. Although the work of this study is preliminary however it serves as a good model for any nonprofit to reap benefit from and significantly enhance its effectiveness towards reaching its goals. The research hopes that it can fundamentally advance and impact how social work is being done on a global platform

Towards Timing Analysis of Multi-core Platforms for Hard Real-Time Systems

CPS Student Forum Portugal was held as part of the Cyber-Physical Systems Week (CPS Week 2018), 10-13 April, Porto-Portugal.We intend to provide solutions that can be used to quantify and analyze the non-determinism arising from the sharing of two main resources in MCPs, i.e., caches and interconnects. • Accurately quantify the cache related contention in single core platforms. • Bounding the interference due to cache hierarchy and last-level shared cache (LLC) in multicore platforms. • Model the inter-core interference due to the sharing of Bus/interconnects in a MCP. • Develop a new timing analysis taking into account the interference caused by both caches and interconnects and their impact on the timing properties of tasks running on MCPsinfo:eu-repo/semantics/publishedVersio

ResilienceP Analysis: Bounding Cache Persistence Reload Overhead for Set-Associative Caches

3rd Doctoral Congress in Engineering will be held at FEUP on the 27th to 28th of June, 2019This work presents different approaches to calculate CPRO for set-associative caches. The PCB-ECB approach uses PCBs of the task under analysis and ECBs of all other tasks in the system to provide sound estimates of CPRO for set-associative caches. The resilienceP analysis then removes some of the pessimism in the PCB-ECB approach by considering the resilience of PCBs during CPRO calculations. We show that using the state-of-the-art (SoA) resilience analysis to calculate resilience of PCBs may result in underestimating the CPRO tasks may suffer. Finally, we have also presented a multi-set alike resilienceP analysis that highlights the pessimism in the resilienceP analysis and provides some insights on how it can be removed.info:eu-repo/semantics/publishedVersio

A Compact Cylindrical-Shape Microstrip Structure with Cloaking Properties for Mutual Coupling Reduction in Array Antennas

A cylindrical-shaped microstrip structure with cloaking properties is presented as a shielding device to reduce the mutual coupling between two patch antennas. The surface comprises of a number of 2-port microstrip (2-PM) elements printed on individual substrates and, to enclose a particular region, several 2-PM elements are interconnected into a cylindrical shape. Each 2-PM element has the capability of coupling an incident EM field on the surface to the adjacent interconnected elements. Then, because the 2-PM elements are connected into a cylindrical shape, the incident EM field is re-radiated from the other interconnected 2-PM elements in a direction away from the transmitter; achieving a behavior similar to a cloak. The prototypes in this dissertation illustrates that this surface has the additional benefit of overcoming many of the manufacturing difficulties of traditional cloaks because microstrip structures are used. To demonstrate this concept, a cylindrical surface operating at 3.89 GHz and a frequency reconfigurable surface (consisting of 2-port frequency reconfigurable microstrip elements (2-PFRM)) operating at 3.68 GHz and 3.89 GHz is simulated in HFSS, manufactured and measured in a full anechoic chamber. Moreover, as an application, the cylindrical surface operating at 3.89 GHz is used to reduce the mutual coupling between two patch antennas operating simultaneously at 3.89 GHz. The radiation pattern and the gain of a 2-element array is measured to demonstrate the negligible effects of a cylindrical surface on the far field antenna array parameters. Simulation and measurement results are in good agreement and validate the proposed EM cloak-based surface for applications such as antenna array shielding, radar cross section and communications in complex EM environments

Advancing Social Change by Synergizing Nonprofit Organizations with Common Missions

The aim of this study is to advance the efforts of nonprofit organizations in achieving their missions. In the form of a case study, the paper discusses how this can be achieved by bringing together the resources of different nonprofit and for profit organizations that serve a common cause/mission. An endeavor is made for helping an eye care charity organization by impacting it in both a positive and sustainable manner. The effort reaches to various organizations related to eye healthcare in order to seek out the common cause they all are working for. It is found out that the more closely related the missions of the organizations are the stronger and more effective will be the resultant synergies of their collaboration. Although the work of this study is preliminary however it serves as a good model for any nonprofit to reap benefit from and significantly enhance its effectiveness towards reaching its goals. The research hopes that it can fundamentally advance and impact how social work is being done on a global platform

Save water and safe water: Evaluation of design and storage period on water quality of rainwater harvesting system

The present research has been aimed to assess the appropriateness of different aspects of rooftop rainwater harvesting system as an alternative of ground water installed at Chitra Topi. 25 households were purposively selected for the collection of relevant data with the help of interview schedules, focus group discussions, and water sampling. Average rooftop area of surveyed households was 100 m2. Ideal storage system and proper management of surplus during peak seasons can ensure water availability throughout the year. From quality perspective, there are few issues in the physical, chemical and microbiological parameters. But by the introduction of simple components there problems can be rectified to a large extent. Based on results, it is concluded that rain water harvesting systems were shown to be a relatively low cost option for improving a households’ geographical and temporal access to a water source, increasing convenience and decreasing collection times. Keywords: Rainwater, Harvesting, Design, Water qualit

ResilienceP Analysis: Bounding Cache Persistence Reload Overhead for Set-Associative Caches

This work presents different approaches to calculate CPRO for set-associative caches. The PCB-ECB approach uses PCBs of the task under analysis and ECBs of all other tasks in the system to provide sound estimates of CPRO for set-associative caches. The resilienceP analysis then removes some of the pessimism in the PCB-ECB approach by considering the resilience of PCBs during CPRO calculations. We show that using the state-of-the-art (SoA) resilience analysis to calculate resilience of PCBs may result in underestimating the CPRO tasks may suffer. Finally, we have also presented a multi-set alike resilienceP analysis that highlights the pessimism in the resilienceP analysis and provides some insights on how it can be removed.info:eu-repo/semantics/publishedVersio

211009

Tasks running on microprocessors with cache memories are often subjected to cache related preemption delays (CRPDs). CRPDs may significantly increase task execution times, thereby, affecting their schedulability. Schedulability analysis accounting for the impact of CRPD has been extensively studied over the past two decades for systems with a single level of cache. Yet, the literature on CRPD for multilevel non-inclusive caches is relatively scarce. Two main challenges exist when analyzing multilevel caches: (1) characterization of the indirect effect of preemption, i.e., capturing the increase in cache interference at lower cache levels (e.g., L2 cache) due to the evictions of cache content from a higher cache level (e.g., L1 cache), and (2) upper bounding the maximum CRPD suffered by tasks at lower cache levels (e.g., L2 cache), i.e., determining the cache content of tasks that can be evicted from lower cache levels in case of preemptions. Existing analysis that focus on bounding CRPD for multilevel non-inclusive caches overestimate the values of (1) and (2) leading to pessimistic worst-case response time (WCRT) estimations. In this work, we reduce the excessive pessimism of the state-of-the-art CRPD analysis for multilevel non-inclusive caches by (i) introducing the notion of multi-level useful cache blocks, i.e., cache blocks that can cause CRPD at different cache levels, and use it to compute a tighter bound on the indirect effect of preemption of tasks; and (ii) deriving a new analysis to compute tighter bounds on the CRPD of tasks at lower cache levels (e.g., L2 cache). We performed a thorough experimental evaluation using benchmarks to compare the performance of our proposed CRPD analysis against the state-of-the-art CRPD analysis. Experimental results show that our proposed CRPD analysis dominates the existing analysis and improves task set schedulability by up to 20% percentage pointsThis work was partially supported by National Funds through FCT/MCTES (Portuguese Foundation for Science and Technology), within the CISTER Research Unit (UIDP/UIDB/04234/2020); also by the Operational Competitiveness Programme and Internationalization (COMPETE 2020) under the PT2020 Partnership Agreement, through the European Regional Development Fund (ERDF), and by national funds through the FCT, within project PREFECT (POCI-01-0145-FEDER-029119); also by the European Union’s Horizon 2020 - The EU Framework Programme for Research and Innovation 2014-2020, under grant agreement No. 732505. Project ”TEC4Growth - Pervasive Intelligence, Enhancers and Proofs of Concept with Industrial Impact/NORTE-01- 0145-FEDER000020” financed by the North Portugal Regional Operational Programme (NORTE 2020), under the PORTUGAL 2020 Partnership Agreement.info:eu-repo/semantics/publishedVersio