scholarly journals Automatic Parallelization using Open MP Directives

With the increase in the advent of parallel computing, it has become necessary to write OpenMP programs to achieve better speedup and to exploit parallel hardware efficiently. However, to achieve this, the programmers are required to understand OpenMP directives and clauses, the dependencies in their code, etc. A small mistake made by them, such as wrongly analysing a dependency or wrong data scoping of a variable, can result in an incorrect or inefficient program. In this paper, we propose a system which can automate the process of parallelization of a serial C code. The system accepts a serial program as input and generates the corresponding parallel code in OpenMP without altering the core logic of the program. The system has used different data scoping and work sharing constructs available in OpenMP platform.The system designed here aims at parallelizing “for” loops, “while” loops, nested “for” loops and recursive structures.The system has parallelized “for” loop by considering the induction variable. And converted “while” loop to “for” loop for parallelization. The system is tested by providing several programs such as matrix addition, quick sort, linear search etc. as input. The execution time of programs before and after parallelization is determined and a graph is plotted to help visualize the decrease in execution time

2018 ◽  
Vol 10 (2) ◽  
pp. 269-295
Author(s):  
Sri Waluyo

This paper discusses the content of Q.S. al-Baqarah ([2]: 67-73). The data used in the preparation of this paper is the data that is primary and secondary. The primary source is data obtained from the core source. In conducting a study of a verse, it is clear that the primary data source is derived from the Qur'an,precisely on Q.S. al-Baqarah ([2]: 67-73). Secondary data is dataobtained from other sources that are still related to the problemand provide interpretation of the primary source. The method usedin analyzing this paper is the tahlili method. This method describesthe meaning contained by the Qur'an, verse by verse, and letterafter letter according to the order in the Mushaf. The descriptionincludes the various aspects which the interpreted verses contain,such as the meaning of the vocabulary, the connotation of thesentence, the background of the verse down, its relation to otherverses, both before and after. And do not miss the opinion that hasbeen given regarding the interpretation of these verses, whetherdelivered by the Prophet, companions, the tabi'in, as well as othercommentators. This study shows that in Q.S. (2): 67-73) there arevalues of moral education which include: 1) morals in asking, (2)morals to parents, (3) patience of educators, (4) educator honesty,and (5) obedience of learners.


2019 ◽  
pp. 286-293
Author(s):  
Olga Zotova ◽  
Elena Perelygina ◽  
Sergey Mostikov

The perception of one’s own identity is one of the basic moments of a personality construct as they relate to how people act; perceive the world around and with what social they identify themselves. While immersed in an alien culture these perceptions transform. The authors aimed to examine differences in selfimages of the Russian-speaking emigrants before and after emigration. Our hypothesis implies significant differences in self-image upon immersing in another cultural environment. The objective we set resides in identifying aspects of selfimage exposed to transformations and the degree of these changes. For data accumulating before and after the process of international migration with a period of 14 months, we exploited M. Kuhn and T. McPartland’s test “Who am I?” The data demonstrated statistically significant differences in the respondents’ self –image in the course of adaptation. The results allow us to conclude that with a changing social situation self-perception also most alternations exhibit those aspects of selfimage through which the respondents interacted with a host-country population. We believe that self-image presents a hierarchically organized, complex, and dynamic structure with the core and the periphery. The components of self-image can rebuild itself in response to a situation of social interaction.


Populism ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 148-164
Author(s):  
Alexandra Yatsyk

Abstract This paper examines the discourse of PiS party in Poland as a form of biopolitical populism. I view this phenomenon as a specific style of political discourse rather than an ideology, that, first, focuses on bodily issues, including family and gender policy, sexual behavior, etc., second—it is inherently performative and as such it appeals to emotions, and, third—it directly communicates with “people” while circumventing the existing institutional framework of the state. Based on the cases of PiS rhetoric on the Smolensk catastrophe, and its narratives on gender and anti-LGBTQ issues, I demonstrate how the latter could be used for political othering and for subverting the core democratic principles. My data includes publications in Polish media and on social platforms (Twitter and Facebook), mostly before and after elections to European and national parliaments in May and October 2019, as well as during the presidential election in spring 2020.


1998 ◽  
Vol 274 (4) ◽  
pp. R1158-R1161
Author(s):  
Evvi-Lynn M. Rollins ◽  
James E. Fewell

In newborns and adults of a number of species including humans, exposure to acute hypoxemia produces a “regulated” decease in core temperature, the mechanism of which is unknown. Considering that various cortical areas participate in autonomic regulation including thermoregulation, the present experiments were carried out to test the hypothesis that the cerebral cortex plays a role in modulating the regulated decrease in core temperature during acute hypoxemia. This hypothesis was tested by determining the core temperature response to acute hypoxemia in chronically instrumented adult Sprague-Dawley rats before and after cortical spreading depression (i.e., functional decortication) was produced by the local application of potassium chloride to the dura overlying the cerebral hemispheres. There was no effect of cortical spreading depression on baseline core temperature. Core temperature decreased during acute hypoxemia in a similar fashion when the cerebral cortex was intact as well as during functional decortication. Thus our data do not support the hypothesis that the cerebral cortex modulates the regulated decrease in core temperature that occurs in adult rats during acute hypoxemia.


2004 ◽  
Vol 31 (2) ◽  
pp. 505-507
Author(s):  
NICHOLAS SOBIN

Radford (1988: 2) and others before and after have argued that the core theoretical question (i) ‘How are human languages structured?’ is logically prior to another core theoretical question (ii) ‘How are human languages acquired?’ This is said to be so because the answer to (i), the structure of human language, is the real target of question (ii) – language acquisition is about acquiring the structure of a human language. Thus, we can't ask about how a thing is learned before we know what it is. Bearing this dictum in mind, consideration of both Crain & Thornton (1998) (C&T) and the Drozd critique (present volume) raises an interesting question: is linguistic theory and the data on which it is established sufficiently developed to inform ‘external’ empirical studies in areas such as language acquisition? At this point, it isn't clear that it is. The data of theoretical linguistics is often idealized and sometimes rather narrow. A given construction may be narrowly investigated (cited) for its apparent interest as a side-light on another area or a more general theoretical issue rather than being investigated more fully/paradigmatically in its own right. Further, the latter sort of investigation might shed a very different light on a phenomenon only investigated narrowly. So paradoxically, it is often only in the context of doing experimental work such as acquisition or variation research that such fuller investigation takes place, possibly revealing new and crucial facts which may prove relevant to theory construction.


2014 ◽  
Vol 571-572 ◽  
pp. 17-21
Author(s):  
Rong Huang ◽  
An Ping Xiong ◽  
Yang Zou

MapReduce is one of the core framework of Hadoop, it’s computing performance has been widely concerned and researched. In heterogeneous environment, unreasonable map task assignments and inefficient resource utilization lead to multiple backup tasks and the job total execution time is poor.For these problems, this paper proposes a new map task assignment strategy, which is map task dynamic balancing strategy based on file label. The strategy marks on job according to the different types, estimates node computing capabilities and historical processing efficiency of each label task, ensures map task which was assigned can execute successfully. Experiments show that, the strategy can effectively reduce number of backup tasks in map phase, and to some extent optimize the total execution time of the job.


Author(s):  
Horacio González-Vélez ◽  
Maryam Kontagora

Performance evaluation of MapReduce using full virtualisation on a departmental cloudThis work analyses the performance of Hadoop, an implementation of the MapReduce programming model for distributed parallel computing, executing on a virtualisation environment comprised of 1+16 nodes running the VMWare workstation software. A set of experiments using the standard Hadoop benchmarks has been designed in order to determine whether or not significant reductions in the execution time of computations are experienced when using Hadoop on this virtualisation platform on a departmental cloud. Our findings indicate that a significant decrease in computing times is observed under these conditions. They also highlight how overheads and virtualisation in a distributed environment hinder the possibility of achieving the maximum (peak) performance.


2010 ◽  
Vol 34 (8) ◽  
pp. 326-329 ◽  
Author(s):  
Gisli H. Gudjonsson ◽  
Gemma Webster ◽  
Timothy Green

Aims and methodTo investigate the attitude of staff towards the recovery approach in forensic mental health services and the impact of training on staff knowledge and attitudes. A specially constructed 50-item recovery approach staff questionnaire, which focused on the core components of the recovery approach, was completed by 137 members of staff in in-patient forensic services in Lambeth, south London.ResultsStaff were generally very positive about the implementation of the recovery approach in forensic services and those who had received training scored significantly higher on the questionnaire than non-trained staff.Clinical implicationsThe great majority of staff agree that the recovery approach to care does have a place in forensic services. This is important and needs to be built into the implementation of this approach in forensic services.


2011 ◽  
Vol 492 ◽  
pp. 358-361 ◽  
Author(s):  
Ting Sun ◽  
Long Quan Shao ◽  
Jun Ai ◽  
Bin Deng ◽  
Ning Wen

This study compared the translucency of IPS e.max all-ceramic system of A and D color series veneered and glazed at clinically appropriate thicknesses. Core specimens (n = 5) of IPS e.max were produced and veneered with IPS e.max veneering porcelain to final dimensions (13 mm in diameter, 0.6 mm in thickness for core specimens with a thickness of 0.3 and 1.0 mm for core specimens with a thickness of 0.5 mm). Luminous reflectance was measured three times each specimen with a calibrated spectrophotometer after veneering and again after glazing cycle. Contrast ratios (CR=Yb/Yw) were measured from the luminous reflectance (Y)of the tested specimens with a black (Yb) and a white background (Yw). There was no significant difference in contrast ratios of specimens within the same color series before and after glazing (P > 0.05). Significant difference was found in the contrast ratios of specimens of the same color but different thickness before and after glazing (P < 0.05). The specimens with a thickness of 1.0mm presents significantly higher contrast ratios than specimens of the same color with a thickness of 0.6mm before and after glazing. The contrast ratios of glazed specimens were significantly lower than nonglazed ones. The Contrast ratio increases as the thickness of the core veneer materials increase, while luminosity and chroma are not related to relative translucency. The glazing cycle results in decreased opacity for core veneer materials.


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