1,721,190 research outputs found
Workflow optimization in distributed computing environment for stream-based data processing model / Saima Gulzar Ahmad
Full text linkWith the advancement in science and technology numerous complex scientific applications
can be executed in heterogeneous computing environment. However, the bottle
neck is efficient scheduling algorithms. Such complex applications can be expressed in
the form of workflows. Geographically distributed heterogeneous resources can execute
such workflows in parallel. This enhances the workflow execution. In data-intensive
workflows, heavy data moves across the execution nodes. This causes high communication
overhead. To avoid such overheads many techniques have been used, however in this
thesis stream-based data processing model is used in which data is processed in the form
of continuous instances of data items. Data-intensive workflow optimization is an active
research area because numerous applications are producing huge amount of data that is
increasing exponentially day by day.
This thesis proposes data-intensive workflow optimization algorithms. The first algorithm
architecture consists of two phases a) workflow partitioning, and b) partitions mapping.
Partitions are made in such a way that minimum data should move across the partitions.
It enables heavy data processing locally on same execution node because each partition
is mapped to one execution node. It overcomes the high communication costs. In the
mapping phase, a partition is mapped on that execution node which offers minimum execution
time. Eventually, the workflow is executed. The second algorithm is a variation
in first algorithm in which data parallelism is introduced in each partition. Most compute
intensive task in each partition is identified and data parallelism is applied to that
task. It reduces the execution time of that compute intensive tasks. The simulation results
prove that proposed algorithms outperform from state of the art algorithms for variety
of workflows. The datasets used for performance evaluation are synthesized as well as
workflows derived from real world applications. The workflows derived from real world applications include Montage and Cybershake. Synthesized workflows were generated
with different sizes, shapes and densities to evaluate the proposed algorithms. The simulation
results shows 60% reduced latency with 47% improvement in the throughput.
Similarly, when data parallelism is introduced in the algorithm the performance of the
algorithm improved further by 12% in latency and 17% in throughput when compared to
PDWA algorithm. In the real time stream processing framework the experiments were
performed using STORM with a use-case data-intensive workflow (EURExpressII). Experiments
show that PDWA outperforms in terms of execution time of the workflow with
different input data size
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
Variations 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
Inula racemosa Hook. f. Pushkarmool: Its Ethnobotanical Uses, Phytochemicals, and Pharmacological Activities
No full textInula racemose Hook.f. is one of the important medicinal plants used in Indian Ayurvedic medicine, Chinese Traditional Medicine(CTM), Bhutanese Sowa Rigpa Medicine (BSM), and European Homeopathy. The extract of Inula racemose is used against cough, dyspnoea, asthma, tuberculosis, pains, acute enteritis, dysentery, and as an expectorant. It is also prepared with other plant extracts for treating angina, hyperlipidaemia, hepatic ischaemia and ischaemic heart diseases. Since this plant is used in many cultures or traditional medicines for treating various ailments, it bears significant economic, commercial, and conservation values. This chapter discusses the distribution, taxonomy, ethnobotany, pharmacognosy, phytochemistry, pharmacology, and the trade and industry of Inula racemosa
Enokitake (Flammulina velutipes)
No full textFlammulina velutipes is one of the most important commercialized mushrooms across the globe, with an annual market share of billions of dollars. The mushroom is consumed not only due to its nutritional value but also its medicinal properties; 76 secondary metabolites have been isolated, characterised, and reported to show a range of health benefits, from antihypertensive to anticancer properties. Nevertheless, Hazard Analysis and Critical Control Points (HACCP) system practice is necessary to warrant the value as well as safety of cultivated mushroom products as the global market for mushroom is increasing every year
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Potential Biomarkers in the Sera of Breast Cancer Patients from Bahawalpur, Pakistan
No full textMost of the approximately 90,000 cases of Breast Cancer (BC) documented annually in Pakistan are not diagnosed properly because of lack of suitable markers. We performed serum proteome expression profiling of BC and benign breast disease (BBD) patients with the aim to identify biomarkers that can be helpful for diagnosis and prognosis of the disease. Sera of patients were analyzed by one-dimensional SDS polyacrylamide gel electrophoresis (PAGE). Differentially expressed proteins were subjected to identification through LC-MS/MS analysis. In majority of the BC cases some acute phase proteins (APP) and some complement system components (C3 and C8) containing fractions were up-regulated with the exception of transthyretin (TTR) which was predominantly (68.75%) down-regulated (n = 33/48) in the sera of these patients. Varying expression patterns were observed in BBD patients and healthy controls. These differentially expressed proteins have the potential to serve as diagnostic biomarkers for BC as well as benign breast diseases
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