This note describes a digital signal processor (DSP) based waveform generator, which can generate a sine wave, up to 24 kHz, a square wave, up to 5 kHz, and a triangular wave, up to 12 kHz. A DSP starter kit with code...
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This note describes a digital signal processor (DSP) based waveform generator, which can generate a sine wave, up to 24 kHz, a square wave, up to 5 kHz, and a triangular wave, up to 12 kHz. A DSP starter kit with code composer Studio has been used in the design of a waveform generator. The waveform generators can also produce periodic arbitrary waveforms and amplitude modulated signals. Two synchronized signals can be obtained by using the waveform generator too. The spectral components of the signals generated are found comparable with a commercially available signal generator. The total harmonic distortion of the sine wave generated is less than 0.6%.
Photovoltaic (PV ) penetration has increased significantly in the last decade. PV Penetration with optimal capacity and location can reduce feeder power losses. The aims are to investigate degradation characteristics ...
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Photovoltaic (PV ) penetration has increased significantly in the last decade. PV Penetration with optimal capacity and location can reduce feeder power losses. The aims are to investigate degradation characteristics of feeder power loss value due to PV penetration in some radial distribution system and to obtain the smallest losses based on its characteristics to determine optimal PV capacity and installation location on radial distribution system. The simulation used DIgSILENT Powerfactory 14.1 to obtain losses data of the feeder. PV penetration location is varied from the nearest substation to the farthest bus from substation. The losses characteristics as the shift of the installation location of the PV to the end of the feeder produces the second order polynomial graph (y = ax 2 - bx + c, a> 0) and the function graph of x with the negative (y = ax -c ). This characteristic is used in calculation with cprogramming to determine the optimal location and capacity of PV, where the result of determining the optimum point is in accordance with the result of simulation, but it has different value of feeder power loss of 11.18 %. By simulation, optimal PV location with range 42.1% - 89.47% or average 67.25% feeder length from substation with 80% - 90% penetration.
The Bologna process has brought about a revolution in university studies since, among other things, it encourages continuous evaluations throughout the academic period. This situation causes already depleted teaching ...
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The Bologna process has brought about a revolution in university studies since, among other things, it encourages continuous evaluations throughout the academic period. This situation causes already depleted teaching teams to have an additional workload, so automatic tools are needed to evaluate the new assignments. In the computer science field, the ideal evaluation technique would be to use automaticcode evaluators (i.e., Java, c, c++, etc.). The main objective of this work is to analyze whether the use of c-coding self-assessment exercises correlates with an improvement in exam performance. For this purpose, we have collected self-assessment exercises carried out on the AulaWeb platform belonging to the Degree in Organizational Engineering and Degree in chemical Engineering, taken in the last 5 and 3 years, respectively, in the course of programming Fundamentals (Fundamentos de Programacion) in an engineering school of the Universidad Politecnica de Madrid. In total, 688 students completed these assignments. The most important results are: (a) regarding the January final exam, self-assessment exercises have influence on the final grade and (b) regarding the June final exam, there are academic years where students forget to carry out programming problem of greater complexity making a negative correlation between self-assessment performance and final scores achieved.
Students’ level of thinking can be measured in terms of their problem solving, logical thinking and cognitive skills. The aim of this research is to prove the hypotheses, that the students’ level of thinking is not ...
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Students’ level of thinking can be measured in terms of their problem solving, logical thinking and cognitive skills. The aim of this research is to prove the hypotheses, that the students’ level of thinking is not a significant factor for students to achieve good result in cprogrammingcourse. This course is a core subject offered to engineering foundation students in centre of Foundation Studies (cFS), Universiti Teknologi MARA (UiTM), Malaysia. In Malaysian education system, students have been exposed to these three skills during their secondary school in Mathematics subject. Students are expected to possess problem solving, logical thinking and cognitive skills in order to acquire programming skill. In this research, we measure the students’ thinking level as the independent variable. This is achieved by distributing a set of questionnaire to 170 respondents out of 700 students. The questionnaires were evaluated by using rubrics table and the score was based on Likert Scale. Students’ score for the course, which includes the course work and final examination marks, were named as dependant variable. SPSS is used to explore the impact of students’ thinking level as a significant factor to cprogrammingcourse. In this case study, it is found that the students’ thinking level is not a significant factor to the students’ score in this course.
Often software for wireless sensor networks (WSNs) is developed using a specific event based operating system (OS) such as TinyOS. However, this requires steep learning curve for the new developers. Other operating sy...
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ISBN:
(纸本)9781450303446
Often software for wireless sensor networks (WSNs) is developed using a specific event based operating system (OS) such as TinyOS. However, this requires steep learning curve for the new developers. Other operating systems for embedded devices have limited support for new hardware platforms. Our goal is to provide an operating system for resource constrained devices that is easy to use for the wide range of researchers and developers familiar with cprogramming language and Unix operating system concepts. In addition, we provide a framework for agile portability to new hardware platforms, due to the nature of WSN systems that require specific hardware or features for the sensing tasks at hand. We propose Multiple agent netted sensor Operating System (MansOS), that demonstrates ability to execute the same application on different platforms including x86 cPU based computers for easy simulation and debugging of a single node or a whole network. The new platforms are easily added to MansOS thanks to the well defined abstraction layers. MansOS is being successfully used in real world applications, such as wild animal tracking and environmental monitoring in a fruit care research garden. It has also been used in academic environment for teaching wireless sensor networks.
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