explain the biological purpose of positive feedback loops
Báo cáo khoa học: "The role of positive feedback in Intelligent Tutoring Systems" ppt
... predominance of the tutor in the conversation. In the CS protocols,on average, 94% of the words belong to the tutor,and most of the tutors’ discourse is some form of di-rect instruction. On the other ... 2). The model showed a significant effect of feedback forlinked lists and stacks, but no significant effect ontrees. Interestingly, the effect of positive feedback is positive, but the effect of ... 0.67). Examples of feedback episodes are reported in Figure 1. The number of positive feedback episodes and the number of negative feedback episodes have been in-troduced in the regression model...
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Tài liệu Báo cáo khoa học: Neuronal growth-inhibitory factor (metallothionein-3): evaluation of the biological function of growth-inhibitory factor in the injured and neurodegenerative brain pdf
... in all of these conditions [22]. In the trau-matically injured brain, however, the synthesis of MT1and MT2, as well as the synthesis of GIF, are up-regu-lated by reactive astrocytes in the vicinity ... isoform has led to intense interest in the roles of the entire MT family in the brain, with particularfocus on the role of these proteins in the injured orneurodegenerative brain.Discovery of ... lossin the AD brain. Further investigation of the increasedneurotrophic activity of the AD brain revealed that itcorrelated with the loss of a specific neuroinhibitoryfactor, rather than the presence...
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Tài liệu Báo cáo khoa học: Branched N-glycans regulate the biological functions of integrins and cadherins doc
... and biological function. For example, only N-glycanslocated on either the b-propeller of a5[55] or the I-likedomain of b1or b3[68] contribute to the regulation of integrin function. Therefore, ... Down-regulation of the alpha-Gal epitope expression in N-gly-cans of swine endothelial cells by transfection with the N-acetylglucosaminyltransferase III gene. Modulation of the biosynthesis of terminal ... speculate that modifi-cation of particular sites, which are involved in regula-tion of the conformation of integrin, determine the extent of cell migration. The mutual regulation of GnT-III and E-cadherinTo...
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The Biological Basis of Nursing: Clinical Observations ppt
... the lowerend of the septum, the impulse passes via the Purkinje fibres at the end of the bundle branches to the ventricular muscle. The impulse passes upwardsacross the ventricles causing them ... causingexpansion of the vessel for the brief moment that the wave of pressurepasses. The pressure wave is caused by contraction of the ventricleson the left side of the heart forcing blood into the arteries. ... excretion.Metabolism THE BIOLOGICAL BASIS OF NURSING: CLINICAL OBSERVATIONS12 The area of the brain responsible for this control of temperature is the hypothalamus, the body’s thermostat. The preoptic nucleus of...
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the amazing results of positive thinking-mantesh
... individuals are not like that. They are people from all walks of life, the manual workers and the mer-chants, the mothers and the fathers, the teachers, the old people, and the young people too, who ... things which took place in the lives of thousands of people when they applied the principles of dynamic change. Since publication of The Power of Positive Thinking, a book which teaches ... says. " ;The trick is to get the men to thinking of themselves as successful; and then the business will be successful." John told me about a boy he met at one of the companies...
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An action research on the use of continuous feedback to improve the first year students' pronunciation at the english department, college of foreign languages, vietnam national university, hanoi part 1
... SATISFACTIONOver the years, the development of different theories of management and different approached to organization has affected the way we view motivation. In the 19th century, the writer ... There is one sport at which the British are always the world champions. Nobody can beat them at the noble art of queuing. The British actually look forward to spending their weekends in a queue, ... lakes. It is an agency of the Department of Agriculture. The first is the threat of fire and fuel. This year, forest fires have burned more than three million hectares of land. That is almost...
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An action research on the use of continuous feedback to improve the first year students' pronunciation at the english department, college of foreign languages, vietnam national university, hanoi part 2
... overview of the study in which the rationale for the research, the research problem, the purposes, the research questions, the scope of the study, the research method, the significance of the study, ... classified in terms of: (1) The height of the bulk of the tongue in the mouth(2) The front/back position of the tongue in the mouth(3) The degree of lip-rounding(4) The length of vowels (Roach, ... English. The voice of the students was recorded and then played again for the students themselves to find out the mistakes they had made. After the students realized the mistakes they had made, the...
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Tài liệu Báo cáo khoa học: Roles of the human Rad51 L1 and L2 loops in DNA binding doc
... permonomer of poly(dT), showing that the changes weremainly due to the binding of the first DNA, while the binding of the second DNA had less influence(Fig. 5A). To ensure that the estimation of the ... binding.ResultsStrategy of mutational analysisIn order to study the functions of the L1 and L2 loops of HsRad51, we examined the effect of replacing the aromatic residues in the L1 and L2 loops withABCFig. ... identified in these eukaryotic and archaeal pro-teins (Fig. 1A). Like the case of bacterial RecA, the L1and L2 loops of the eukaryotic Rad51 proteins faceinside of their helical filaments, where the...
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Tài liệu Báo cáo khoa học: The structure and biological characteristics of the Spirochaeta aurantia outer membrane glycolipid LGLB pdf
... and HMBCspectra of compound 1. Labels illustrateassignment of the amide linkage between the amino group of Asp and the carboxyl group of GalA residue E.Scheme 1. The structures of o ligosaccharides ... 76.56corresponded to the loss of the nonreducing end C-G-Aunit and ammonium from the molecular ion. Furtherfragmentation gave the fragment ion at m/z 1436.42, owingto the loss o f the branching xylose ... branchinginformation [31]. The charge state of a fragment ion is thenidentified by u sing the isotope profile, owing to the highresolution provided by the TOF mass analyser. The product-ion s pectrum...
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