There are a few basic computational concepts that are at the core of all programming languages. The exact elements making out such a set of concepts determine (1) the specific nature of the computational services such...
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Agile software development methods have been increasingly adopted worldwide and became one of the mainstream software development approaches. Agile methods have also had an impact on software engineering education wit...
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Aliasing occurs when two or more references to an object exist within the object graph of a running program. Although aliasing is essential in object-orientedprogramming as it allows programmers to implement designs ...
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作者：
Mycroft, AlanComputer Laboratory
University of Cambridge William Gates Building JJ Thomson Avenue Cambridge CB3 0FD United Kingdom
Historically, concerns about aliasing and confinement in object-oriented languages arose from the Software Engineering or Program Verification viewpoint: spaghetti-data resulted in programs too delicate to modify or &...
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It is the best of times and the worst of times. Bulk-billing rates for non-referred attendances (principally general practitioners) have reached over 82%.l Yet there has been renewed attention focused on the growing f...
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It is the best of times and the worst of times. Bulk-billing rates for non-referred attendances (principally general practitioners) have reached over 82%.l Yet there has been renewed attention focused on the growing financial burden that out-of-pocket (OOP) payments impose on patients.2 The apparent contradiction can be reconciled, but to do that we need to get beyond the headline figures. All health care financing, whether provided through government, social agencies or private providers, aims to ensure that individuals are not excluded from receiving costly health care when they need it. When patients face charges, their use of health services is lowered, with OOP expenditures having a greater impact on the use of health care by those with less financial means. So at first glance it seems inconsistent to impose copayments in a system set up to reduce barriers to use.
This volume describes a great number of techniques for confining, defining, analysing, etc. aliases in object-orientedprogramming, each with their own strengths and weaknesses. The missing chapter is the underlying t...
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Since the first papers on "Aliasing in object-orientedprogramming" appeared, since the Geneva Convention on Aliasing, since the developments in Ownership Types, in Separation Logic, and all the other develo...
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In this paper we explore how we can use Specification and Description Language, to represent simulation models that make an intensive use of geographical information, like environmental simulation models. The purpose ...
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ISBN:
(纸本)9781479939503;9781479920778
In this paper we explore how we can use Specification and Description Language, to represent simulation models that make an intensive use of geographical information, like environmental simulation models. The purpose is to perform a complete unambiguous, graphical and formal representation of a wildfire simulation model. Specification and Description Language is a modern objectoriented language that allows the definition of distributed systems. It has focused on the modeling of reactive, state/event driven systems, and has been standardized by the International Telecommunications Union (ITU) in the Z. 100. Thanks to the graphical representation of the simulation model, the interaction between the experts that usually come from different areas is simplified. Also, due to the unambiguous and modular nature of the language, all the details of the model can be validated by personnel that do not necessarily are used with programming languages or simulation infrastructures.
The difficulties in teaching introductory programming, objectoriented Design (OOD) and object oriented programming (OOP) are well known, whereas game attraction in young teens as well as the strong appeal that mobile...
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ISBN:
(纸本)9781467351126;9781467351133
The difficulties in teaching introductory programming, objectoriented Design (OOD) and object oriented programming (OOP) are well known, whereas game attraction in young teens as well as the strong appeal that mobile technologies has on students is being debated as a means to engage students and overcome such difficulties. This work presents a one term teaching experience on a K-11 class focusing on learning OOD and OOP by using a versatile framework such as XNA to build games. The pedagogical approach, the context and the contents of the course are presented, with a focus on the challenges in presenting advanced curriculum topics in a classroom with highly differentiated students and on the strategies used to overcome such difficulties. The main elements of the approach are: a project and inquiry based pedagogical method;an "object first" approach leading to designing an UML class and a sequence diagram from the beginning, formation of a shared memory of student's solutions to assignments and a blog used for supporting class activities and fostering self-reflection and critical thinking. A content analysis of the blog as well as of the data collected during face to face conversation both in the laboratory and in class reveals common errors and suggests approaches for avoiding them.
In this paper, we investigate the performance of two-way amplify-and-forward (AF) relaying scheme over independent but not necessarily identically distributed (i.n.i.d.) cascaded generalized-K fading channels. We deri...
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ISBN:
(纸本)9781467359528;9781467359504
In this paper, we investigate the performance of two-way amplify-and-forward (AF) relaying scheme over independent but not necessarily identically distributed (i.n.i.d.) cascaded generalized-K fading channels. We derive expressions for both upper and lower bounds on overall outage probability (OOP) for the considered two-way AF relaying system. Further, we derive tight closed-form approximate expressions for the OOP as well as for the average symbol error probability (ASEP) for the considered relaying system. We present simulation and numerical results to validate the proposed theoretical analysis, and to demonstrate the effects of various channel parameters on the overall system performance. Our results reveal that the overall system performance improves with increase in shadowing and/or fading parameters, as well as with decrease in number of cascading channels over two hops.
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