Large classes

This paper concerns a problem of finite-time stability for a class of linear singular large-scale systems with delays. Based on matrix transformations, Lyapunov function method combined with new estimation techniques, we derive sufficient conditions for solving the finite-time stability of the system.

11p viprimi 16-12-2024 1 0   Download

Given the positive outcomes identified in the research surrounding flipped classroom pedagogical practice and the lack of research in primary school settings, this research aims to explore the implementation of the flipped classroom pedagogical practice in Singapore primary classes and the extent to which the practice can potentially contribute to classroom interactions.

186p runthenight04 02-02-2023 7 2   Download

This study was conducted at some universities in Ho Chi Minh city in Vietnam. The objectives aimed at finding out the similarities and differences in teachers’ and students’ beliefs about classroom interactions in large non-English majored classes and how teachers’ and students’ beliefs about classroom interactions corresponded to their actual practice. Data were collected from questionnaires for 100 teachers teaching English to non-English majors and 100 students. Besides, semi-structured interviews were conducted with representative teachers and students from both groups.

236p nguathienthan12 23-05-2021 20 3   Download

The important conclusions that we reach at the end of this research paper are largely based on the practical observation and survey implemented by the author at HPU classroom teaching.

62p nguathienthan12 18-05-2021 39 6   Download

The two techniques: group work and questioning will help students increase their participation in communicative activities in large classes; systematic knowledge of using these techniques in large class context; suggest the implications for learners and teachers in order to raise their awareness of students’ active role and teachers’ efficiency in large classes.

54p trinhthamhodang10 16-03-2021 28 7   Download

The main aim of this thesis is to overcome the second limitation of the automatic plant identification (low recognition accuracy) by proposing novel and robust methods for plant recognition. For this, we first focus on improving the recognition accuracy of plant identification based on images of one sole organ. Among different organs of the plant, we select leaf as this organ is the most widely in the literature.

27p gaocaolon6 30-07-2020 30 3   Download

Superantigens (SAgs) are a class of disease-causing and immunostimulatory proteins of bacterial or viral origin that activate a large number of T-cells through interaction with the Vbdomain of T-cell receptors (TCRs). In this study, recombinant TCRbchains were constructed with human variable domains Vb5.2, Vb1and Vb2.1, expressed as inclusion bodies, refolded and purified. The Streptococcus pyogenesSAg SSA-1 was cloned and expressed as a soluble periplasmicprotein. SSA-1wasobtainedbothas amonomer and a dimer that has an intermolecular disulfide bond. ...

9p awards 05-04-2013 38 5   Download

A hallmark ofa-crystallin-type small heat shock proteins (sHsps) is their highly dynamic oligomeric structure which promotes intermolecular interactions involved in subunit exchange and substrate binding (chaperone-like activity). We studied the oligomeric features of two classes of bacterial sHsps by size exclusion chromatography and nanoelectro-spray mass spectrometry.Proteins of both classes formed large complexes that rapidly dissociated upon dilution and at physiologically relevant heat shock temperatures....

10p dell39 03-04-2013 45 3   Download

Cone snails comprise
500 species of venomous molluscs, which have evolved the ability to generate multiple toxins with varied and often exquisite selectivity. One class, the a-conotoxins, is proving to be a powerful tool for the differentiation of nicotinic acetylcholine receptors (nAChRs). These comprise a large family of complex subtypes, whose significance in physiological functions and pathological conditions is increasingly becoming apparent.

15p dell39 03-04-2013 47 4   Download

Endovanilloids are defined as endogenous ligands of the transient receptor potential vanilloid type 1 (TRPV1) protein,a nonselective cation channel that belongs to the large family of TRP ion channels,and is activated by the pungent ingredient of hot chilli peppers,capsaicin. TRPV1 is expressed in some nociceptor efferent neurons, where it acts as a molecular sensor of noxious heat and low pH. However,the presence of these channels in var-ious regions of the central nervous system,where they are not likely to be targeted by these noxious stimuli,suggests the existence of endovanilloids.

8p dell39 03-04-2013 43 2   Download

Cyclic nucleotide specific phosphodiesterases (PDEs) are important components of all cAMP signalling networks. In humans, 11 different PDE families have been identified to date, all of which belong to the class I PDEs. Pharmaco-logically, theyhavebecome of great interest as targets for the development of drugs for a large variety of clinical condi-tions. PDEs in parasitic protozoa have not yet been exten-sively investigated, despite their potential as antiparasitic drug targets.

11p dell39 03-04-2013 42 4   Download

The eukaryotic class 1 polypeptide chain release factor is a three-domain protein involved in the termination of translation, the final stage of poly-peptide biosynthesis. In attempts to understand the roles of the mid-dle domain of the eukaryotic class 1 polypeptide chain release factor in the transduction of the termination signal from the small to the large ribo-somal subunit and in peptidyl-tRNA hydrolysis, its high-resolution NMR structure has been obtained.

15p media19 04-03-2013 44 3   Download

We study enhancement of diffusive mixing on a compact Riemannian manifold by a fast incompressible flow. Our main result is a sharp description of the class of flows that make the deviation of the solution from its average arbitrarily small in an arbitrarily short time, provided that the flow amplitude is large enough. The necessary and sufficient condition on such flows is expressed naturally in terms of the spectral properties of the dynamical system associated with the flow. In particular, we find that weakly mixing flows always enhance dissipation in this sense. ...

33p dontetvui 17-01-2013 50 9   Download

We study the large scale geometry of the mapping class group, MCG(S). Our main result is that for any asymptotic cone of MCG(S), the maximal dimension of locally compact subsets coincides with the maximal rank of free abelian subgroups of MCG(S). An application is a proof of Brock-Farb’s Rank Conjecture which asserts that MCG(S) has quasi-flats of dimension N if and only if it has a rank N free abelian subgroup. (Hamenstadt has also given a proof of this conjecture, using different methods.

24p dontetvui 17-01-2013 69 7   Download

D. Mumford conjectured in [33] that the rational cohomology of the stable moduli space of Riemann surfaces is a polynomial algebra generated by certain classes κi of dimension 2i. For the purpose of calculating rational cohomology, one may replace the stable moduli space of Riemann surfaces by BΓ∞ , where Γ∞ is the group of isotopy classes of automorphisms of a smooth oriented connected surface of “large” genus. Tillmann’s theorem [44] that the plus construction makes BΓ∞ into an infinite loop space led to a stable homotopy version of Mumford’s conjecture, stronger than the original [24]. .

100p noel_noel 17-01-2013 39 7   Download

Introduction In 1903 Voronoi [42] postulated the existence of explicit formulas for sums of the form (1.1) n≥1 an f (n) , for any “arithmetically interesting” sequence of coefficients (an )n≥1 and every f in a large class of test functions, including characteristic functions of bounded intervals. He actually established such a formula when an = d(n) is the number of positive divisors of n [43]. He also asserted a formula for (1.2) an = #{(a, b) ∈ Z2 | Q(a, b) = n} , where Q denotes a positive definite integral quadratic form [44]; ...

67p noel_noel 17-01-2013 58 8   Download

How to Become an Oracle DBA As you start out on your journey to become a proficient Oracle DBA, you have many sources of information on the Oracle database: • Oracle Database 11g database administration classes, which have now been boiled down to a pair of five-day long classes • Oracle manuals—an entire library of which are available on the Oracle web sites • Books from various publishers that impart the various pieces of knowledge you need to become an accomplished Oracle DBA You’ll also need to acquire the necessary operating system knowledge.

10p vongsuiphat 04-01-2010 121 27   Download