The Experts below are selected from a list of 5361 Experts worldwide ranked by ideXlab platform
Rene Kling - One of the best experts on this subject based on the ideXlab platform.
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supplier relationship management anathema for the south african public procurement sector
Journal of Transport and Supply Chain Management, 2013Co-Authors: M J Naude, Intaher Marcus Ambe, Rene KlingAbstract:The public sector is recognised as being one of the most important customer groups for many suppliers and service providers because of the volume of public expenditure. Supplier relationship management (SRM) is a necessary tool on which businesses in the public and private sectors rely. However, in the South African public sector, despite the intention to boost service delivery through efficient and effective supplier-management processes, the development of sound supplier relationships is a challenge. The purpose of this article is to provide insight into supplier-relationship challenges and to suggest a framework for implementing SRM in the South African public sector. The research presented is based on a survey using both descriptive and exploratory research. Data were gathered through semi-structured interviews with 15 participants at eight institutions in KwaZulu-Natal. Purposive sampling techniques were used. The findings reveal that the main supplier-related challenges that handicap procurement practices in the province are a lack of experience, a lack of affirmable suppliers, threats and bribes, a lack of integrity, an inability to meet delivery deadlines and quality issues. The findings further reveal that supplier relationships in the public sector are of a Transactional Nature. A five-stage framework is therefore recommended for implementing SRM in the South African public sector and in order to assist government procurement officials to reap the benefits of SRM whilst supporting the requirements of public-sector procurement.
M J Naude - One of the best experts on this subject based on the ideXlab platform.
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supplier relationship management anathema for the south african public procurement sector
Journal of Transport and Supply Chain Management, 2013Co-Authors: M J Naude, Intaher Marcus Ambe, Rene KlingAbstract:The public sector is recognised as being one of the most important customer groups for many suppliers and service providers because of the volume of public expenditure. Supplier relationship management (SRM) is a necessary tool on which businesses in the public and private sectors rely. However, in the South African public sector, despite the intention to boost service delivery through efficient and effective supplier-management processes, the development of sound supplier relationships is a challenge. The purpose of this article is to provide insight into supplier-relationship challenges and to suggest a framework for implementing SRM in the South African public sector. The research presented is based on a survey using both descriptive and exploratory research. Data were gathered through semi-structured interviews with 15 participants at eight institutions in KwaZulu-Natal. Purposive sampling techniques were used. The findings reveal that the main supplier-related challenges that handicap procurement practices in the province are a lack of experience, a lack of affirmable suppliers, threats and bribes, a lack of integrity, an inability to meet delivery deadlines and quality issues. The findings further reveal that supplier relationships in the public sector are of a Transactional Nature. A five-stage framework is therefore recommended for implementing SRM in the South African public sector and in order to assist government procurement officials to reap the benefits of SRM whilst supporting the requirements of public-sector procurement.
Albert M. K. Cheng - One of the best experts on this subject based on the ideXlab platform.
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DCPS - P-FRP task scheduling: A survey
2016 1st CPSWeek Workshop on Declarative Cyber-Physical Systems (DCPS), 2016Co-Authors: Albert M. K. Cheng, Yu JiangAbstract:Functional Reactive Programming (FRP) is a declarative approach for modeling and building reactive systems. The FRP has been shown to be an expressive formalism for building graphics, robotic, and vision applications. The Priority-based FRP (P-FRP) is a formalism of FRP that allows preemption of execution and guarantees real-time response. Since functional programs cannot maintain state and mutable data, changes made by programs that are preempted have to be rolled back, and the work done by the preempted programs has to be discarded. Hence in the P-FRP model, a preempted lower priority task will have to restart after higher priority tasks have completed execution. Current real-time research mainly focuses on the classic preemptive or non-preemptive models and plenty methods have been developed to analyze the real-time guarantees of these models. Unfortunately, due to its Transactional Nature where preempted tasks are aborted and have to restart, the execution semantics of the P-FRP model does not fit into the standard definitions of classic preemptive or non-preemptive execution. In this survey paper, we review existing researches on the P-FRP task scheduling, and present a few research areas for future work.
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Feasibility interval for the Transactional event handlers of P-FRP
Journal of Computer and System Sciences, 2013Co-Authors: Chaitanya Belwal, Albert M. K. ChengAbstract:Functional Reactive Programming (FRP) is a resource aware declarative approach for modeling and building safety-critical embedded systems. Recently, Priority-based FRP (P-FRP) was introduced as a formalism that guarantees real-time response. Due to the state-less Nature of execution of functional programs, P-FRP implements a Transactional Nature of execution where preempted lower-priority tasks are aborted. This makes the response time of a lower-priority task completely dependent on the execution pattern of higher priority tasks. The feasibility interval in the classical preemptive model11In this paper the classical preemptive model refers to a real-time system in which tasks can be preempted by higher priority tasks and can resume execution from the point they were preempted. of real-time systems is known and is dependent on the least common multiple (LCM) of task periods. However, since the abort Nature of preemption can induce side-effects on the execution of lower-priority tasks, it has been unknown to date if the feasibility in P-FRP is also dependent on the LCM. In this paper, we rigorously prove that these side-effects of preemption are bounded within the LCM and formally derive a value of the feasibility interval in P-FRP. This value of feasibility interval is vital for more robust schedulability analysis of the P-FRP execution model. Highlights� We rigorously prove that task abortions in P-FRP are bounded within the Least Common Multiple (LCM) of task periods. � We formally derive a value of the feasibility interval in P-FRP. � We address both synchronous and asynchronous releases of P-FRP tasks. � Feasibility intervals of synchronous releases in P-FRP are proved to be the same as those in the preemptive model. � A game-board method is proposed to compute the actual response time.
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TrustCom - Feasibility Interval for the Transactional Event Handlers of P-FRP
2011IEEE 10th International Conference on Trust Security and Privacy in Computing and Communications, 2011Co-Authors: Chaitanya Belwal, Albert M. K. ChengAbstract:declarative approach for modeling and building safety-critical embedded systems. Recently, Priority-based FRP (P-FRP) was introduced as a formalism that guarantees real-time response. Due to the state-less Nature of execution of functional programs, P-FRP implements a Transactional Nature of execution where preempted lower priority tasks are aborted. This makes the response time of a lower priority task completely dependent on the execution pattern of higher priority tasks. The feasibility interval in the classical preemptive model of real-time systems is known and is dependent on the least common multiple (LCM) of task periods. However, since the abort Nature of preemption can induce side-effects on the execution of lower priority tasks, it has been unknown to date if the feasibility in P-FRP is also dependent on the LCM. In this paper, we rigorously prove that these side-effects of preemption are bounded within the LCM and formally derive a value of the feasibility interval in P-FRP. This value of feasibility interval is vital for more robust schedulability analysis of the P-FRP execution model.
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EUC - Partitioned Scheduling of P-FRP in Symmetric Homogenous Multiprocessors
2011 IFIP 9th International Conference on Embedded and Ubiquitous Computing, 2011Co-Authors: Chaitanya Belwal, Albert M. K. ChengAbstract:Functional Reactive Programming (FRP) is a declarative approach to modeling and building reactive systems. Priority-based FRP (P-FRP) has recently been introduced as a FRP formalism that guarantees real-time response. P-FRP guarantees that when a higher priority task is released, the system will immediately preempt any executing lower-priority tasks. To maintain guarantees of state-less execution offered by the functional programming model, P-FRP implements a Transactional Nature of execution. Each higher priority event in P-FRP can abort a lower priority task forcing it to restart. Existing work on partitioning tasks in multi-processor systems have been focused on the classical preemptive model of execution1. However, due do its Transactional Nature, the schedulability tests used in the partitioning algorithms for the preemptive model, cannot be applied 'as is' to the P-FRP execution model. While multiprocessor response time analysis of P-FRP has been done in previous work, partitioning schemes for tasks in multi-processor systems have not been presented yet. In this paper, we present an exact schedulability test for P-FRP and use it in two existing first-fit partitioning schemes. We also introduce a new first-fit partitioning scheme based on the processing time of tasks, which yields better results than the other two schemes. We also show that the number of processors required to schedule tasks in P-FRP are more than or equal to the number of processors required to schedule the same in the preemptive model.
Patricia M. Cooper - One of the best experts on this subject based on the ideXlab platform.
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Teaching Young Children Self-regulation through Children’s Books
Early Childhood Education Journal, 2007Co-Authors: Patricia M. CooperAbstract:Today’s emphasis on using children’s literature as a tool to teach reading and writing sub-skills distracts teachers’ attention from looking to children’s books for their historical role in helping children navigate the intellectual, social, and emotional terrains of childhood. This article argues, first, that early childhood educators must remain fluent in the use of literature that supports young children’s psychosocial development. Second, teachers must establish criteria for choice. By way of example, it examines two popular books for young children, Sendak’s ( 1963 ) Where the Wild Things Are [New York: HarperCollins Publishers] and Shannon’s ( 1998 ) No, David ! [New York: Blue Sky Press] Three theoretical perspectives guide the analysis. The first combines Dewey’s ( 1938 /97) [Experience and education. New York:Touchstone] impetus for learning and Vygotsky’s ( 1978 ) [Mind in society. Cambridge: Harvard University Press] theory that learning precedes development through scaffolded social interaction. The second is Erikson’s ( 1950 , 1985) [Childhood and society. New York: W. W. Norton & Company, Inc.] theory of psychosocial development in light of the 4–6-year-old’s drive towards self-regulation, control, and independence. The third is Rosenblatt’s ( 1978 ) [The reader, the text, the poem. Urbana, IL: National Council of Teachers of English] Transactional Nature of reading.
Intaher Marcus Ambe - One of the best experts on this subject based on the ideXlab platform.
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supplier relationship management anathema for the south african public procurement sector
Journal of Transport and Supply Chain Management, 2013Co-Authors: M J Naude, Intaher Marcus Ambe, Rene KlingAbstract:The public sector is recognised as being one of the most important customer groups for many suppliers and service providers because of the volume of public expenditure. Supplier relationship management (SRM) is a necessary tool on which businesses in the public and private sectors rely. However, in the South African public sector, despite the intention to boost service delivery through efficient and effective supplier-management processes, the development of sound supplier relationships is a challenge. The purpose of this article is to provide insight into supplier-relationship challenges and to suggest a framework for implementing SRM in the South African public sector. The research presented is based on a survey using both descriptive and exploratory research. Data were gathered through semi-structured interviews with 15 participants at eight institutions in KwaZulu-Natal. Purposive sampling techniques were used. The findings reveal that the main supplier-related challenges that handicap procurement practices in the province are a lack of experience, a lack of affirmable suppliers, threats and bribes, a lack of integrity, an inability to meet delivery deadlines and quality issues. The findings further reveal that supplier relationships in the public sector are of a Transactional Nature. A five-stage framework is therefore recommended for implementing SRM in the South African public sector and in order to assist government procurement officials to reap the benefits of SRM whilst supporting the requirements of public-sector procurement.
