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A method is described for determining multiple loop feedback topologies which yield minimum sensitivities for symmetrical, all-pole bandpass filters. The procedure begins with a follow-the-leader feedback (FLF) topology and additional feedback loops are constructed until minimum sensitivity is achieved. Filters comprised of identical second-order sections and non-identical sections, respectively, are considered. 相似文献
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Professor Kiril Petkov 《Al-Masaq: Islam & the Medieval Mediterranean》2007,19(2):99-119
This essay examines the fundamentals of the Byzantine and Muslim political discourses during the period of the Crusades by analyzing a common political trope, the concept of Western pride and arrogance. The principal argument is that the seemingly stable categories of Eastern political propaganda obscure a massive discursive shift. At the beginning of their encounter with the Latin Christians both Byzantines’ and Levantine Muslims’ discourses on power and their place on the international stage were hegemonical, exclusive and self-referential. Towards the end of the Crusading period and under the steady pressures of Western practices, both societies’ political discourses came to accept as legitimate principles of international politics—such as power as a claim rather than a right, relations based on contract, territoriality and legitimacy of secular rule—that have long been the staple of Western conceptualization of politics, but were initially seen as utterly alien by Byzantines and Levantine Muslims. 相似文献
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David NICHOLAS Anthony WATKINSON Hamid R. JAMALI Eti HERMAN Carol TENOPIR Rachel VOLENTINE Suzie ALLARD Kenneth LEVINE 《Learned Publishing》2015,28(1):15-21
The article presents one of the main findings of an international study of 4,000 academic researchers that examined how trustworthiness is determined in the digital environment when it comes to scholarly reading, citing, and publishing. The study shows that peer review is still the most trustworthy characteristic of all. There is, though, a common perception that open access journals are not peer reviewed or do not have proper peer‐review systems. Researchers appear to have moved inexorably from a print‐based system to a digital system, but it has not significantly changed the way they decide what to trust. They do not trust social media. Only a minority – although significantly mostly young and early career researchers – thought that social media are anything other than more appropriate to personal interactions and peripheral to their professional/academic lives. There are other significant differences, according to the age of the researcher. Thus, in regard to choosing an outlet for publication of their work, young researchers are much less concerned with the fact that it is peer reviewed. 相似文献
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Kenneth Tobin Leonie Rennie Grady Venville Hye-Eun Chu Peter Fensham James Gallagher Reinders Duit Wolfgang Graeber Ed van den Berg Brian Hand Stephen Ritchie Justin Dillon 《Cultural Studies of Science Education》2011,6(3):783-793
For almost a half century David F. Treagust has been an exemplary science educator who has contributed through his dedication and commitments to students, curriculum development and collaboration with teachers, and cutting edge research in science education that has impacted the field globally, nationally and locally. A hallmark of his outstanding career is his collaborative style that inspires others to produce their best work. 相似文献