A recent study [7] has shown that many computing students are not able to develop straightforward programs after the introductory programming sequence. Normal student assessment should have highlighted this problem, i...
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ISBN:
(纸本)1581137982
A recent study [7] has shown that many computing students are not able to develop straightforward programs after the introductory programming sequence. Normal student assessment should have highlighted this problem, it did not, therefore normal assessment of programming ability does not work. We examine why current assessment methods (written exams and programming assignments) are faulty. We investigate another method of assessment (the lab exam) and show that this form of assessment is more accurate. We explain why accurate assessment is essential in order to encourage students to develop programming ability. Copyright 2004 ACM.
Fetal heart rate extraction from the abdominal ECG is of great importance due to the information that carries in assessing appropriately the fetus well-being during pregnancy. In this work a novel automated method is ...
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Software pipelining is an effective technique to reduce cycle count by exploiting instruction level parallelism in loops. It has been implemented in most VLIW DSP compilers. However, software pipelining expands the co...
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Software pipelining is an effective technique to reduce cycle count by exploiting instruction level parallelism in loops. It has been implemented in most VLIW DSP compilers. However, software pipelining expands the co...
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Software pipelining is an effective technique to reduce cycle count by exploiting instruction level parallelism in loops. It has been implemented in most VLIW DSP compilers. However, software pipelining expands the code size due to the introduction of prelude and postlude. To address this problem, many VLIW DSP compilers include certain code size reduction features. During compilation, a user is given limited options of exercising these code reduction features. As a result, the tradeoff options between cycle count and code size are also limited. Yet today's software development often requires an optimum balance between code size and cycle count, which in turn requires a much wider tradeoff space. This paper presents a new heuristic code-size-constraint loop optimization approach to extend the tradeoff space. Preliminary experimental results indicate that the new approach can significantly widen the tradeoff space, thus providing DSP users with more flexibility to meet their various design criteria.
In this paper, field emission was measured in varying atmospheres of different gases, from an on-going study of thin films of polycrystalline boron nitride (BN). The initial results indicate that the nanostructured BN...
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In this paper, field emission was measured in varying atmospheres of different gases, from an on-going study of thin films of polycrystalline boron nitride (BN). The initial results indicate that the nanostructured BN surface exhibit robust emission characteristics in the presence of residual gases such as oxygen, xenon, water vapor, and nitrogen. Also, no permanent effect on the emission characteristics was observed from the exposure of the films to the gas.
The paper is devoted to the problem of modeling demand for inventory management of slow-moving items in the case of reporting errors. It is proposed a generalization of the beta-binomial demand model that takes into a...
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The paper is devoted to the problem of modeling demand for inventory management of slow-moving items in the case of reporting errors. It is proposed a generalization of the beta-binomial demand model that takes into account possible reporting errors in the learning sample. For the new model, there are developed identification and forecasting algorithms that provide consistent estimators of the model parameters and mean square optimal forecasts. The efficiency of the proposed approach is illustrated by an application example for slow-moving car parts.
This paper propose a system to edit copyrighted documents for the administration of copyrightable documents and has established the application of a possible copyright model to the mobile broadcasting system. The copy...
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Wireless networks have become more important in the last few months. The low initial costs for hardware and the use of mobile equipment (Notebook, PDA) increase the acceptance. The access to the wireless network - not...
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ISBN:
(纸本)1932415165
Wireless networks have become more important in the last few months. The low initial costs for hardware and the use of mobile equipment (Notebook, PDA) increase the acceptance. The access to the wireless network - not only from inside a building - increases the security risk. Thus, the wireless network must be protected. With the implemented mechanisms (e.g. WEP) a secure connection is not guaranteed. The established mechanisms are insecure. This may be solved by the IEEE 802.11i standard. All components (wireless cards, access points) must support this standard for adaptive security. For a successful integration of a network-wide security concept, all systems must be considered. They must be as secure as possible for such a realization. A VPN connection among wireless systems and the local network is one solution. A concept for general security - analogous to intrusion detection systems (IDS) - can be implemented under this condition. This paper describes these additional requirements to secure a wireless network in combination with a usual local network.
In this paper, we introduce the lifecycle of a Web services solution that consists of Web services modeling, development, deployment, publishing, as well as discovery, composition and collaboration, plus monitoring an...
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Software pipelining is a loop optimization technique that has been widely implemented in modern optimizing compilers. In order to fully utilize the instruction level parallelism of the recent VLIW DSP processors, DSP ...
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Software pipelining is a loop optimization technique that has been widely implemented in modern optimizing compilers. In order to fully utilize the instruction level parallelism of the recent VLIW DSP processors, DSP programs have to be optimized by software pipelining. However, because of the transformation of the original sequential code, a software-pipelined loop is often difficult to understand, test, and debug. It is also very difficult to reuse and port a software-pipelined loop to other processors especially when the original sequential code is unavailable. In this paper we propose a de-pipelining technique, which converts the optimized assembly code of a software-pipelined loop back to a semantically equivalent sequential counterpart. Preliminary experiments on 20 assembly programs verifies the validity of the proposed depipelining algorithm.
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