1,721,013 research outputs found
Static Allocation of Basic Blocks Based on Runtime and Memory Requirements in Embedded Real-Time Systems with Hierarchical Memory Layout
Full text linkModern microcontrollers for safety-critical real-time systems use a hierarchical memory system to increase execution speed and memory capacity. For this purpose, flash memories, which offer high capacity at low transfer rates, are combined with scratchpad memories, which provide high access speed at low memory capacities. The main goal is to use both types of memory in such a way that their advantages are optimally exploited. The target is to allocate runtime-intensive code fragments with low memory requirements to the fast scratchpad memories. Previous approaches to separate program code on system memories consider the executed functions as the smallest logical unit. This is contradicted by the fact that not all parts of a function have the same computing time in relation to their memory usage. This article introduces a procedure that automatically analyses the compiled source code and identifies runtime intensive fragments. For this purpose, the translated code is executed in an offline simulator and the maximum repetition for each instruction is detected. This information is used to create logical code fragments called basic blocks. This is repeated for all functions in the overall system. During the analysis of the functions, the dependencies between them are also extracted and a corresponding call-graph with the call frequencies is generated. By combining the information from the call graph and the evaluation of the basic blocks, a prognosis of the computing load of the respective code blocks is created, which serves as base for the distribution into the fast scratchpad memories. To verify the described procedure, EEMBC’s CoreMark is executed on an Infineon AURIX TC29x microcontroller, in which different scratchpad sizes are simulated. It is demonstrated that the allocation of basic blocks scales significantly better with smaller memory sizes than the previous function-based approach
Ulta-Low-Power Wireless Sensor Node Design on 100 uW Scavenging Energy for Applications In Biomedical Monitoring
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Energy efficient cooperative spectrum sensing in Cognitive Radio Sensor Network Using FPGA: A survey
No full textMemOpt: Automated Memory Distribution for Multicore Microcontrollers with Hard Real-Time Requirements
No full textVariations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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