共查询到20条相似文献，搜索用时 15 毫秒
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This article analyses the real cause of the tragedy of Othello. From the perspective of his social status, the article points out that the implication of his collapse into murderous violence is actually his constant worries about the threats to his social identity as a black hero in a white world. 相似文献
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Surekha Bhat Guruprasad Rao K. Dilip Murthy P. Gopalakrishna Bhat 《Indian journal of clinical biochemistry : IJCB》2009,24(4):430-432
Miniature replicas modeled after the Great Pyramid of Giza are believed to concentrate geoelectromagnetic energy within their
cavities and hence act as antistressors in humans and animals. Although there are not many reports of adverse effects of ‘overexposure’
in the pyramid, subjects have claimed to feel uneasy after certain duration of staying in the pyramid. The present study was
aimed to analyze the effects of prolonged pyramid exposure on plasma cortisol level, markers of oxidative damage and antioxidant
defense in erythrocytes of adult female Wistar rats. Rats were divided into three groups, normal controls (NC, n=6) that were
maintained under standard laboratory conditions in their home cages, pyramid exposed group-2 (PE-2, n=6) & pyramid exposed
group-4 (PE-4, n=6) where the rats were housed under the pyramid for 6 hours/day for 2 weeks and 4 weeks respectively. Plasma
cortisol and erythrocyte TBARS levels were significantly lower in both PE-2 and PE-4 rats and erythrocyte GSH levels and GSH-Px
activity were significantly higher in them as compared to the NC rats. There was no significant difference in the results
for these parameters between the PE-2 and PE-4 rats except for erythrocyte GSH-Px activity which was significantly more in
the PE-2 rats than in the PE-4 rats. Although these results don’t confirm any adverse effects of prolonged exposure in pyramids,
they indicate a possibility of such adverse effects. 相似文献
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Ta-Mu Chien 《Journal of The Franklin Institute》1974,298(3):181-199
The classical theory of matching an arbitrary load to a resistive generator to achieve a desired power gain is extended to matching an arbitrary load to a generator with arbitrary internal impedance. Given the load and generator impedances and the desired power gain, the necessary and sufficient conditions on the power gain is established such that there exists a lumped lossless 2-port which, when operated between two given impedances, realized the desired power gain. The constraints on the gain function are formulated in coefficient and integral form. Design procedures are outlined and illustrated by several nontrivial examples. A design chart is prepared to facilitate the engineer to carry out the details involved.The first part of the paper develops the matching theory. Part II gives design procedure and examples. 相似文献
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《中国科学院院刊(英文版)》2006,(2)
Despite its tiny size, the fruitfly (Drosophila) brain is fairly intricate.Recently a group of neuroscien- tists from the CAS Institute of Biophysics (IBP) have managed to catch the first glimpse of the circuitry within a fruitfly neural s ys tem for visu… 相似文献
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《中国科学院院刊(英文版)》2021,(1)
Insight-HXMT, an astronomical satellite of China working in a very broad X-ray waveband, has helped identify a magnetar as the origin of a fast radio burst from our own galaxy. 相似文献
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SONG Jianlan 《中国科学院院刊(英文版)》2021,(1):22-30
Fast radio bursts(FRBs),pulses of brief but extremely bright radio waves blasting from the depth of the cosmos,particularly those repeatedly erupting,have been ... 相似文献
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《中国科学院院刊(英文版)》2016,(3)
正Hippo-YAP(Yes-associated protein)signaling is a key pathway that regulates cell proliferation and organ size,whose mis-regulation is closely associated with human cancer.In a recent Nature Communications paper,Dr.WANG Zefeng’s group from the CAS-MPG Partner Institute for Computational Biology(PICB),Shanghai Institutes for Biological 相似文献
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Mediation is becoming more and more important in the process of settling conflict nowadays, so it＇s quite necessary to explain the legal value of mediation from the view of jurisprudence. 相似文献
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《国家科学评论(英文版)》2015,(2)
<正>Catalysis is a key and enabling technology and plays a critical role in the ields of energy conversion,materials synthesis,environmental protection and human health care.he gradual depletion of oil resources——the basis of modern energy and chemical industries——coupled with growing public demand for increased ecological and environmental protection, 相似文献
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《中国科学院院刊(英文版)》2004,(3)
Isomorphism is a universal phenomenon, which helps us gain more knowledge aboutnature. Thanksto the phenomenon,for example,many newspecies andgenera have beenidentified in plantand animal taxonomy. In geology,however,thecompleteisomorphousseries is quite rare. Among thenearly100new mineralsdiscoveredover the past two decades, no re-porthas been made on such series.Itseems to be more difficultto finditoutthantodiscovera newmineral. Recently, a research groupheaded by Prof. Liu Tiegen… 相似文献
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《The Journal of High Technology Management Research》2001,12(1):93-112
Previous research has contributed to our understanding of technology-intensive firms by proposing alternative typologies or classifications of these firms. This study explores the Koberg typology that characterizes firms by growth stage and production technology into four types of organizations: Embryonic, Start-up, Growth, and Mature Multiline. We propose that, consistent with the typology, firms in each type will differ in strategy, structure, practices, and leadership and that performance is contingent on the fit between organizational factors and typology type. In a study of 377 technology-intensive firms, we find support for differences among organizations in organizational variables by typology type. The characteristics of the organizations as well as the typology are significant in explaining organizational performance. However, except for organizational structure, the firm characteristics that are related to performance do not significantly vary by type. The results are discussed in the context of theory development and managerial implications. 相似文献
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Jenna Ruostela Antti Lönnqvist Miikka Palvalin Maiju Vuolle Maija Patjas Anna-Leena Raij 《知识管理研究与实践》2015,13(4):382-390
This paper explores ‘New Ways of Working’ (NewWoW) – that is, non-traditional mobile and flexible work practices, settings and locations using sufficient ICT tools – as a novel approach to improve the performance of a knowledge-intensive organization. This paper makes a contribution by illustrating how the measurement of the impacts of NewWoW can be done and by producing empirical evidence of the benefits of NewWoW. The conceptual background of the study is anchored in the literature on knowledge work productivity and performance as well as on NewWoW. The empirical section reports a longitudinal case study of a change process during which the case company, Rapal, went through a NewWoW project. The impacts of the change are evaluated based on the results of both objective and subjective performance measures. The project was successful and resulted in significant cost savings as well as improvements in environmental performance (CO2 emissions). 相似文献
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Zhigang Ren Chao Xu Zhongcheng Zhou Zongze Wu Tehuan Chen 《Journal of The Franklin Institute》2019,356(1):173-195
In this paper, the boundary stabilization problem of a class of unstable reaction–advection–diffusion (RAD) systems described by a scalar parabolic partial differential equation (PDE) is considered. Different the previous research, we present a new gradient-based optimization framework for designing the optimal feedback kernel for stabilizing the unstable PDE system. Our new method does not require solving non-standard Riccati-type or Klein–Gorden-type PDEs. Instead, the feedback kernel is parameterized as a second-order polynomial whose coefficients are decision variables to be tuned via gradient-based dynamic optimization, where the gradients of the system cost functional (which penalizes both kernel and output magnitude) with respect to the decision parameters are computed by solving a so-called “costate” PDE in standard form. Special constraints are imposed on the kernel coefficients to ensure that the optimized kernel yields closed-loop stability. Finally, three numerical examples are illustrated to verify the effectiveness of the proposed approach. 相似文献
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《中国科学院院刊(英文版)》2004,(1)
The past four years have served as a phase of sound inception for the development of the CAS Institute of Neuoscience (ION), noted Prof. Mu-ming Poo, founding director of ION, at the anniversary meeting held from Nov. 29 to Dec. 1 in Shanghai.Founded on Nov. 27,1999 as a result of the CAS-wide drive for excellence in research known as the Knowledge Innovation Program (KIP), ION is devoted to the whole spectrum of neuroscience, including 相似文献
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《中国科学院院刊(英文版)》2010,24(1):1-4
The 2010 annual conference of CAS opened on January 25 in Beijing. The three-day meeting reviewed the work of CAS over the past year and made arrangements for its tasks in the year ahead, with a focus on planning for the 12th fiveyear period （2011-2015） and the initiation of Innovation 2020 on a trial basis. 相似文献