Membership Management based on a Hierarchical Ring for Large Grid Environments

Journal Article Economic Impact of Pecan Integrated Pest Management Implementation in Texas Get access Marvin Harris, Marvin Harris 1 1Department of Entomology, Texas A&M University, College Station, TX 77843-2475. Search for other works by this author on: Oxford Academic PubMed Google Scholar Bill Ree, Bill Ree 1 1Department of Entomology, Texas A&M University, College Station, TX 77843-2475. Search for other works by this author on: Oxford Academic PubMed Google Scholar John Cooper, John Cooper 2 2Department of Horticulture, Texas Agricllltural Extension Service, Denton, TX 76201-4818. Search for other works by this author on: Oxford Academic PubMed Google Scholar John Jackman, John Jackman 1 1Department of Entomology, Texas A&M University, College Station, TX 77843-2475. Search for other works by this author on: Oxford Academic PubMed Google Scholar Joni Young, Joni Young 1 1Department of Entomology, Texas A&M University, College Station, TX 77843-2475. Search for other works by this author on: Oxford Academic PubMed Google Scholar Ronald Lacewell, Ronald Lacewell 3 3Department of Agricultural Economics, Texas A&M University, College Station, TX 77843. Search for other works by this author on: Oxford Academic PubMed Google Scholar Allen Knutson Allen Knutson 4 4Department of Entomology, Texas Agricultural Extension Service, Dallas, TX 75252-6599. Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Economic Entomology, Volume 91, Issue 5, 1 October 1998, Pages 1011–1020, https://doi.org/10.1093/jee/91.5.1011 Published: 01 October 1998

Soil influence on the performance of 26 native herbaceous plants suitable for sustainable Mediterranean landscaping

The management of the magnanimous spatial data needs the distributed cooperative GIS platform. This paper proposed the Peer To Peer and Cooperating Computing Hybrid Discovering Model of Distributed Geospatial Information. Based on the (Spatial Resource Discovery Agent (SRDA) and ordinary neighbor node, Combined with Spatial data model of MAPGIS7.0, this article brings up the geographic structure query language in P2P network (P2PGSQL), and has designed the interpreter of P2PGSQL. In the Peer To Peer and Cooperating Computing Hybrid Discovering Model, this paper has designed the algorithms that construct the distributed hash table and decrease the delay. By discovering and performing the potential swaps that are beneficial to the match between overlay and physical network, it can reduce the average latency and improve the performance of the system. Based on the P2P Cooperating Computing Hybrid Discovering Model, this article has given the method of the P2PGSQL in grid environment and built the mapping model of the global spatial query sentence to the local query sentence. With constituting a global spatial data resource catalog to record the distributing information of all spatial database on each node, P2PGSQL has backed up effective expression of spatial database management mission in grid environment. Hence, P2PGSQL can sustain the query of distribute spatial data in grid environment. This article has extended the grid spatial relation operation (Intersection, Union, Difference) and synthesized operation (Length, Buffer, intersecting region) and so on. The P2PGSQL can reduce the quantity of spatial data transmitting among nodes and enhance the capacity of parallel operation. At the same time, P2PGSQL can also sustain multi-spatial data model by the extension of structure data on the data type. At the end, an experimental instance of P2PGSQL has been carried out based on mapgis7.0 platform.

Grid computing is the next generation of distributed system. Its goal is to create a huge, independent and powerful virtual machine, and it has been created by gathering different machines with the aim of sharing them. Resource discovery is the most fundamental phase of resource management which has been considered in our work. Considering the advantages and disadvantages of P2P and grid and their architectural similarity; using some of P2P approaches as a solution in Grid can improve the performance of Grid. Semantic technology and fuzzy logic are the two intelligent approaches, which recently apply on P2P network and Grid environment. In P2P networks, nodes are grouping based on their interests. Moreover semantic can be very useful for grouping nodes. This paper follows the identification of resource discovery in grid environment with the help of semantic and fuzzy theory and seeking to present a resource discovery algorithm with respect to exiting obstacles. The proposed approach is assessed in simulated grid environment and the results are compared with other approaches in same conditions. The goals of our approach are to obtain precious matching by clustering nodes which have services semantically related, improving search expressiveness by considering the distances between nodes (delay) in clustering phase, and decreasing response time and processing time by considering the nodes computational capabilities and free space of each node. We evaluate the performance of our approach with some distributed semantic based grid resource discovery models. The results of the experiments show the efficiency of the proposed approach in term of scalability, precision, search expressiveness and response time.

Aim How an appropriate safety syringe was chosen, how the change-over to it was achieved and what outcome measures were used to measure the effectiveness of this change. Introduction One third of all reported sharps injuries in dental practice are due to the use of non disposable dental syringes with most injuries being sustained during removal and disposal of the disposable needle from the non-disposable syringe. Method After evaluation of all available disposable safety syringes they were introduced into a dental school after appropriate education of all staff and students. Risk management provided data on all reported needle-stick injuries in the dental school and a control unit using non disposable syringes for a period of two years. Results Avoidable needle stick injuries reduced from an average of 11.8 to 0 injuries per 1,000,000 hours worked per year as compared with a control unit who reduced their frequency from 26 to 20 injuries per 1,000,000 hours worked. The cost of safety syringes is comparable to non-disposable syringes but the reduction in cost of management of needle stick injuries including the psychological effects are significant. Conclusion Education plays a vitally important role in the effective implementation of the change to safety syringes which is advocated for all dentists.

Application-Specific Network-on-Chip synthesis with flexible router Placement

During the last few years the application scope of peer-to-peer systems has been notably extended. While the problems of scalable data localization have been exhaustively addressed, one may notice that the problem of multicast cost and latency delays in very large, global scale peer-to-peer networks still remains inadequately considered. Many large scale applications will suffer from this multicast cost if the number of users increases. In order to address this problem, we introduce HiOPS - a hierarchical two tier peer-to-peer system which provides a reasonable tradeoff between minimization of multicast cost and latency delays and reduction of maintenance and management cost. Because of its properties and characteristics HiOPS can be considered as a basic infrastructure for a wide range of peer-to-peer applications.

Virtualization technology is rapidly spreading to all IT fields. For different application scenarios, server-based computing has different advantages. Cloud computing is a hot research topic at home and abroad recently. Software and hardware resources are shared through virtualization technology, and then provided to corresponding cloud computing services according to user needs. This paper mainly studies a mobile Internet desktop delivery method and system based on virtualization infrastructure. It consists of VDI system, diskless workstation system and unified storage system. In this scheme, by modifying the virtual graphics driver of desktop cloud server, the video player starts GPU video acceleration by default to process HD video, and at the same time, the original stream of undecoded HD video and processing instructions are sent to the client for decoding and rendering in real time in the virtual graphics driver layer. It provides a reference for future large-scale construction of desktop cloud system, comprehensive replacement of traditional PC, reduction of operation and management costs, and improvement of enterprise information security.

The limited knowledge that decision-makers have on the actual condition of civil structures and infrastructures complicates the management of seismic emergencies in urbanized areas. In this respect, Seismic Structural Health Monitoring (S2HM) can support decision-makers by providing real-time information on the structural condition. Nevertheless, S2HM information comes with a cost, and decision-makers have to decide if installing this type of system is worthy before the information is collected. In this paper, the benefit of S2HM in post-earthquake emergency management is assessed through the Value of Information (VoI) from Bayesian decision analysis. The VoI can be intended as the expected reduction in management costs resulting from monitoring information. If the VoI is higher than the cost of the monitoring system, the manager should install it. The methodology is applied to an exemplary building in a seismic area. It is demonstrated and discussed in the paper that the value of S2HM is strongly influenced by the decision scenario considered by the decision-maker. Specifically, it is shown that the VoI is particularly high when the S2HM information prevents unnecessary building evacuation and related losses of functionality.KeywordsValue of informationEmergency managementSeismic structural health monitoringBuildingEvacuationSeismic losses

This study explores the patterns of sustainable use and management of competing water sectors in the Alanya Water Users Association (WUA) in Southern Türkiye, over eight years (2013–2020) before the SARS-CoV-19 pandemic, focusing on the impacts of the recorded huge growth of tourism. Performance indicators of collective irrigation services are used to identify performance patterns and trends over time. The analysis has revealed a notable increase in water consumption for agricultural activities (+30 %), driven by the cultivation of tropical fruits, without a proportional rise in crop production. Concurrently, effective financial management is observed in the WUA, with a consistent reduction in unit Management, Operation and Maintenance costs (-40–70 %). Additionally, the total water demand has surged (+100 %) due to population growth and tourist flux. However, this increase has tensioned water delivery to crops, indicating higher pressures over water availability for all uses. The study has identified three distinct patterns in the technical, financial, and socio-economic performance of the WUA, particularly highlighting the last four years of increased water usage and the disruption caused by the SARS-CoV-19 pandemic in 2020. Despite the current adequacy of water resources, optimized strategies for water management are advocated to address anticipated demographic growth, the introduction of tropical crops and the environmental impacts of climate change.

本研究では都市のコンパクト化による都市施設の維持管理費用の影響を人口の集約度を変化させることで分析を行なった。小学校、中学校、保育所、公民館、上水道、下水道、道路橋梁を対象施設として取り上げる。方法としては、維持管理費算出のためのモデル構築をした後、宇都宮市をケーススタディとして人口の集約度、配置位置等に考慮し、コンパクトシティ政策が実施された場合に都市施設維持管理費用がいくら削減されるのか算出を行なった。その結果、都市施設維持管理費用が年間最大10億円削減されることが分かった。都市施設数を減らすことにより大きな削減効果が得られることがわかった。

In a previous article I talked about speculative waves in sequence that have hit the global economy since the 2000s in a world struggling with deflation. Well, this wave of speculation has not stopped but today it seems to concern the transfer of industrial plants from the West to China. A process that was born with the good intentions of transferring industrial activities to developing countries with the dual objective. Give a boost to the economy in developing areas and at the same time reduce the management costs of large multinationals' plants. A process therefore that was born with a positive sign in the intent to help a coordinated development of the territories and a reduction in the costs of industrial products. Meanwhile, the objective of coordinating the development of the territories and continents has not been achieved and on the contrary the process has led to an almost exclusive delocalization of industrial production from the West to China. The excess of industrial localization has exacerbated the concentration of unassimilable waste with a worsening of the disease of the planet struggling with atmospheric overheating. The process, therefore, has been slowed down but not stopped for natural reasons. On the other hand, the acceleration of the development of the Chinese economy has also marked a halt coinciding with the spread of the global epidemic. After about fifty years of accelerated economic growth, the Chinese community has sensed the change in the country's economic prospects and has pulled the brakes on both consumption and investments, marking the end of the accelerated race on the road to development. The picture of the speculative evolution of industrial delocalization processes sees together the interest of mega companies in reducing management costs which is congenial to the increase in the financial values of companies that increase on the Western stock exchanges. In other words, delocalization helps reduce management costs and at the same time seems to support ultra increasing financial values. In short, it plays into the hands of speculation which is certainly not the interest of global social and economic development which instead requires coordination of the territories on the road to development. With the further dilemma that the fate of the global economy may be in the hands of the Boards of Directors of mega companies and not of states and communities.​

The article examines the key aspects of the innovative transformation of operational systems of construction enterprise stakeholders in the context of the digitalization of the economy. Principles and approaches to the formation of adaptive operational models that enable enterprises to function effectively under conditions of rapid technological changes are identified. Strategic directions for integrating digital technologies into production, management, and logistics processes and their impact on the competitiveness of construction enterprises are outlined. Special attention is given to the ecosystem approach to transformation, which is based on the integration of innovations, digital platforms, and inter-organizational cooperation. The focus is placed on digital technologies such as Building Information Modeling (BIM), Enterprise Resource Planning (ERP) systems, the Internet of Things (IoT), and process automation, which contribute to creating competitive advantages and ensure the synergistic effect of stakeholder interaction. The impact of these technologies on resource management optimization, cost reduction, and accuracy improvement in construction project execution is analyzed. The article emphasizes the need to develop integrative management models that address both technological and organizational aspects. Construction enterprise stakeholders, facing the challenges of the digital economy, require the implementation of innovative mechanisms for collaboration among participants in the construction process. The ecosystem approach discussed in the article proposes creating a unified digital space that ensures effective communication, real-time data exchange, and improved transparency in managerial decision-making. The structural role of strategic goal-setting is considered as a key component of successful transformation, enabling the prioritization of objectives, the creation of roadmaps for digitalization, and the adaptation of business processes to modern requirements. The significance of innovative culture and the development of staff competencies is highlighted to ensure the resilience of transformational changes. The conclusions of the article emphasize the importance of a systematic approach to modernizing operational systems of construction enterprise stakeholders in the context of the digitalization of the economy. The proposed concept serves as a foundation for implementing long-term innovative solutions aimed at enhancing the efficiency, flexibility, and resilience of enterprises in a dynamic environment.

Opportunistic networks are formed by small devices that communicate over a wireless link with each other. Opportunistic network possess various heterogeneous resources. Resource management and scheduling of these heterogeneous resources are major problems in the Opportunistic network due to highly dynamic behavior of the devices in the opportunistic network. Especially challenging is the multisuser aspect in the opportunistic network environment, since with a high and changeable number of users the workload is difficult to predict, and so making a proper scheduling of tasks becomes a serious problem. The overheads imposed by the waiting queues may become a major part of the total execution time. So to efficiently manage the resources in the opportunistic network, a Grid environment is considered to address the problem of fair sharing. An auction model which is an economic based technique has also been considered in the Grid environment. In the proposed work, a second price auction mechanism is considered to employ a pricing mechanism that is incentive compatible. Incentive compatible pricing mechanisms ensure that the users' self-interests are maximized when they honestly reveal their preferences to the allocation mechanism. These mechanisms can provide powerful guarantees about optimal user behavior and can deliver highly efficient allocations. So in the proposed work, a second price auction mechanism is considered which is very efficient and also it elicits honest information from the participants thereby successfully managing the resource allocation in the Grid environment. A Gossip based mechanism is also considered in the proposed work in order to reduce the overheads caused by the waiting queues.

Spatial query execution is an essential functionality of a sensor network, where a query gathers sensor data within a specific geographic region. Redundancy within a sensor network can be exploited to reduce the communication cost incurred in execution of such queries. Any reduction in communication cost would result in an efficient use of the battery energy, which is very limited in sensors. One approach to reduce the communication cost of a query is to self-organize the network, in response to a query, into a topology that involves only a small subset of the sensors sufficient to process the query. The query is then executed using only the sensors in the constructed topology. The self-organization technique is beneficial for queries that run sufficiently long to amortize the communication cost incurred in self-organization. In this paper, we design and analyze algorithms for suchself-organization of a sensor network to reduce energy consumption. In particular, we develop the notion of a connected sensor cover and design a centralized approximation algorithm that constructs a topology involving a near-optimal connected sensor cover. We prove that the size of the constructed topology is within an O(logn) factor of the optimal size, where n is the network size. We develop a distributed self-organization version of the approximation algorithm, and propose several optimizations to reduce the communication overhead of the algorithm. We also design another distributed algorithm based on node priorities that has a further lower communication overhead, but does not provide any guarantee on the size of the connected sensor cover constructed. Finally, we evaluate the distributed algorithms using simulations and show that our approaches results in significant communication cost reductions.