WorldWideScience

Sample records for group classes sgcs

  1. From mapping class groups to automorphism groups of free groups

    DEFF Research Database (Denmark)

    Wahl, Nathalie

    2005-01-01

    We show that the natural map from the mapping class groups of surfaces to the automorphism groups of free groups, induces an infinite loop map on the classifying spaces of the stable groups after plus construction. The proof uses automorphisms of free groups with boundaries which play the role...... of mapping class groups of surfaces with several boundary components....

  2. SGCS-made ultrafine CaO/Al2O3 sorbent for cyclic CO2 capture

    Institute of Scientific and Technical Information of China (English)

    Cong Luo; Ying Zheng; Ning Ding; Qi Long Wu; Chu Guang Zheng

    2011-01-01

    Multi-cyclic CaO carbonation/calcination is an attractive method for CO2 capture during coal combustion. However, the capture capacity of CaO sharply decreases with increasing carbonation/calcination cycles. In order to improve the stability of CO2 capture capacity of CaO during carbonation/calcination cycles, synthetic CaO/Al2O3 sorbents were synthesized by two methods: wet chemistry and sol-gel-combustion-synthesis (SGCS) to make a further comparison. The results indicate that the SGCS-made CaO/ A12O3 = 80:20 wt% sorbent provides a competitive performance of a capture capacity of 0.43 g-CO2/g-sorbent after 20 cycles.

  3. Classroom contexts: connections between class size and within class grouping.

    Science.gov (United States)

    Blatchford, P; Baines, E; Kutnick, P; Martin, C

    2001-06-01

    There has been a vigorous debate for many years about the educational effects of class size differences, but even if differences have an impact on pupils' academic progress this still leaves unanswered important questions about what mediates the effect. This paper is informed by a classroom contextual perspective, and examines associations between class size and within class groupings (in terms of size and number of groups, adult presence in groups, and type of interaction between grouping members). Age differences in these relationships are also explored. The quantitative study is based on analysis of 3157 groupings, from 672 Reception, Year 2 and Year 5 classes in 331 schools. The qualitative study was based on 12 classes in 8 case study schools, and questionnaire responses completed by over 100 class teachers. Links between size of class and within class groupings were examined on the basis of a 'grouping mapping survey', in which teachers at a given time in the school day provided information on group size and number, adult presence, and type of interaction between pupils, and complementary qualitative analyses of data from teacher-completed questionnaires, and interviews. The number of groups in a class increased with the size of the class. Over all three year groups, small classes had on average just over three groups, while large classes approached six groups. The size of groups in the class decreased with size of class. In class sizes over 25, pupils were more likely to be in a large group of 7-10, while in classes under 25 they were more likely to be in whole class groupings. Qualitative analyses showed that teachers felt that groups of 7-10 pupils had negative educational effects, for example, in terms of the quality and quantity of teaching and children's concentration and contribution in groups. Results suggest that the effects of class size can be best seen as through the size and number of groups, which will then have implications for learning

  4. Conjugacy classes in discrete Heisenberg groups

    Energy Technology Data Exchange (ETDEWEB)

    Budylin, R Ya [Steklov Mathematical Institute of Russian Academy of Sciences (Russian Federation)

    2014-08-01

    We study an extension of a discrete Heisenberg group coming from the theory of loop groups and find invariants of conjugacy classes in this group. In some cases, including the case of the integer Heisenberg group, we make these invariants more explicit. Bibliography: 4 titles.

  5. Small Group Multitasking in Literature Classes

    Science.gov (United States)

    Baurain, Bradley

    2007-01-01

    Faced with the challenge of teaching American literature to large, multilevel classes in Vietnam, the writer developed a flexible small group framework called "multitasking". "Multitasking" sets up stable task categories which rotate among small groups from lesson to lesson. This framework enabled students to work cooperatively in a variety of…

  6. Group Work vs. Whole Class Activity

    Science.gov (United States)

    Tanveer, Asma

    2008-01-01

    Group work has only been recently introduced in the education system of Pakistan but many primary teachers, especially in the public schools, are still not aware of how different kinds of strategies that is group work and whole class teaching facilitate learning among students. This paper aims to provide an overview of teaching strategies to…

  7. Small Group Multitasking in Literature Classes

    Science.gov (United States)

    Baurain, Bradley

    2007-01-01

    Faced with the challenge of teaching American literature to large, multilevel classes in Vietnam, the writer developed a flexible small group framework called "multitasking". "Multitasking" sets up stable task categories which rotate among small groups from lesson to lesson. This framework enabled students to work cooperatively…

  8. On nilpotent groups and conjugacy classes

    OpenAIRE

    Adan-Bante, Edith

    2005-01-01

    Let $G$ be a nilpotent group and $a\\in G$. Let $a^G=\\{g^{-1}ag\\mid g\\in G\\}$ be the conjugacy class of $a$ in $G$. Assume that $a^G$ and $b^G$ are conjugacy classes of $G$ with the property that $|a^G|=|b^G|=p$, where $p$ is an odd prime number. Set $a^G b^G=\\{xy\\mid x\\in a^G, y\\in b^G\\}$. Then either $a^G b^G=(ab)^G$ or $a^G b^G$ is the union of at least $\\frac{p+1}{2}$ distinct conjugacy classes. As an application of the previous result, given any nilpotent group $G$ and any conjugacy class...

  9. Small generators of the ideal class group

    Science.gov (United States)

    Belabas, Karim; Diaz, Francisco Diaz Y.; Friedman, Eduardo

    2008-06-01

    Assuming the Generalized Riemann Hypothesis, Bach has shown that the ideal class group ļof a number field K can be generated by the prime ideals of K having norm smaller than 12big(logabs{mathrm{Discriminant}(K)}big)^2 . This result is essential for the computation of the class group and units of K by Buchmann's algorithm, currently the fastest known. However, once mathcal{C}ell_K has been computed, one notices that this bound could have been replaced by a much smaller value, and so much work could have been saved. We introduce here a short algorithm which allows us to reduce Bach's bound substantially, usually by a factor 20 or so. The bound produced by the algorithm is asymptotically worse than Bach's, but favorable constants make it useful in practice.

  10. Intrinsic characteristic classes for a local Lie group

    CERN Document Server

    Abadoglu, Ender

    2009-01-01

    For a local Lie group M we define odd order cohomology classes. The first class is an obstruction to globalizability of the local Lie group. The third class coincides with Godbillon-Vey class in a particular case. These classes are secondary as they emerge when curvature vanishes.

  11. Introduction of student-led physiology tutorial classes to a traditional curriculum.

    Science.gov (United States)

    Kommalage, Mahinda; Imbulgoda, Naduni

    2010-06-01

    The curriculum in the University of Ruhuna Medical School is of the traditional type. Most teaching activities are faculty member-led activities. Since student-centered learning processes are considered to improve certain skills and attitudes, we introduced student-led group classes (SGCs) in physiology. Depending on the outcome of the SGCs, we planned to develop it further. We designed this study to compare student perceptions on newly introduced SGCs with traditional tutorials (TTs). Student perceptions were assessed using a mixed qualitative and quantitative method. Students recognized and appreciated some favorable features of the SGC, such as the opportunity for discussion, quality of the knowledge, active participation, improvement of presentation ability, and increased breadth of knowledge. However, the majority of students preferred the TT over the SGC despite the highlighted benefits of the SGC. Students appreciated the focused learning for examinations, written preparation, and more tutor involvement in the TT. Students requested a hybrid of the TT and SGC by incorporating mandatory written answers to the SGC with greater contributions from faculty members. Assessment methods that were not aligned with the SGC and ingrained passive didactic teaching-learning methods by students and faculty members had a negative effect on the implementation of SGCs. Cultural and economical factors also contributed adversely. In the second step of this Plan-Do-Check-Act process, we are planning to introduce new formative assessment to assess higher-order cognitive skills and a compulsory tutor training program. Some favorable components from the TT will be incorporated to the SGC.

  12. Group Projects in Interior Design Studio Classes: Peer Feedback Benefits

    Science.gov (United States)

    Jurado, Juan A.

    2011-01-01

    Group projects have been shown to be effective for providing peer feedback in classrooms. While students in regular enrollment classes benefit from peer feedback, low-enrollment classes face many challenges. This study compares peer feedback effectiveness between two interior design studio classes with different design projects. In one class,…

  13. Group Projects in Interior Design Studio Classes: Peer Feedback Benefits

    Science.gov (United States)

    Jurado, Juan A.

    2011-01-01

    Group projects have been shown to be effective for providing peer feedback in classrooms. While students in regular enrollment classes benefit from peer feedback, low-enrollment classes face many challenges. This study compares peer feedback effectiveness between two interior design studio classes with different design projects. In one class,…

  14. Uniformly Exponential Growth and Mapping Class Groups of Surfaces

    OpenAIRE

    Anderson, J. W.; Aramayona, J.; Shackleton, K.J.

    2005-01-01

    We show that the mapping class group (as well as closely related groups) of an orientable surface with finitely generated fundamental group has uniformly exponential growth. We further demonstrate the uniformly non-amenability of many of these groups.

  15. Postgraduates’ Attitudes towards Group Works in Oral English Class

    Institute of Scientific and Technical Information of China (English)

    毕思迪

    2016-01-01

    This study investigated four postgraduates’ attitudes towards group work in oral English class in Tianjin Foreign Studies University. Two sources of data were collected, including interviews and class observations.

  16. Small Group Activities for Introductory Business Classes.

    Science.gov (United States)

    Mundrake, George

    1999-01-01

    Describes numerous small-group activities for the following areas of basic business education: consumer credit, marketing, business organization, entrepreneurship, insurance, risk management, economics, personal finance, business careers, global markets, and government regulation. (SK)

  17. Implementing Small-Group Activities in Large Lecture Classes

    Science.gov (United States)

    Yazedjian, Ani; Kolkhorst, Brittany Boyle

    2007-01-01

    This study examines student perceptions regarding the effectiveness of small-group work in a large lecture class. The article considers and illustrates from students' perspectives the ways in which small-group activities could enhance comprehension of course material, reduce anonymity associated with large lecture classes, and promote student…

  18. Comparison of Group Cohesion, Class Participation, and Exam Performance in Live and Online Classes

    Science.gov (United States)

    Galyon, Charles E.; Heaton, Eleanore C. T.; Best, Tiffany L.; Williams, Robert L.

    2016-01-01

    Though class participation and group cohesion have shown some potential to promote student performance in conventional classrooms, their efficacy has not yet been demonstrated in an online-class setting. Group cohesion, defined as member attraction to and self-identification with a group, is thought to promote positive interdependence and the…

  19. Defining Social Class Across Time and Between Groups.

    Science.gov (United States)

    Cohen, Dov; Shin, Faith; Liu, Xi; Ondish, Peter; Kraus, Michael W

    2017-08-01

    We examined changes over four decades and between ethnic groups in how people define their social class. Changes included the increasing importance of income, decreasing importance of occupational prestige, and the demise of the "Victorian bargain," in which poor people who subscribed to conservative sexual and religious norms could think of themselves as middle class. The period also saw changes (among Whites) and continuity (among Black Americans) in subjective status perceptions. For Whites (and particularly poor Whites), their perceptions of enhanced social class were greatly reduced. Poor Whites now view their social class as slightly but significantly lower than their poor Black and Latino counterparts. For Black respondents, a caste-like understanding of social class persisted, as they continued to view their class standing as relatively independent of their achieved education, income, and occupation. Such achievement indicators, however, predicted Black respondents' self-esteem more than they predicted self-esteem for any other group.

  20. Group cohesion in exercise classes: An examination of gender and type of exercise class differences

    Directory of Open Access Journals (Sweden)

    Hülya Aşçı

    2011-10-01

    Full Text Available Group cohesion has been attributed to the higher levels of attendance and performance and lower levels of drop-outs in exercise classes. Cohesion can be affected by different type of exercise classes and gender. Therefore, the main purpose of the study was to compare the group cohesion levels of martial arts participants (aikido, taekwondo, karate, and kendo with aerobic-like participants (aerobics, aero-steps, phys-gym, and high-low aerobics. This causal comparative study also aimed at examining sex differences in group cohesion in exercise classes. There were 140 participants (Mage=28.1 SD= 8.01 and female= 138 male= 2 in aerobic-like classes and 137 participants (Mage= 22.2 SD= 3.8 and female= 48 male= 89 in martial arts classes. Results revealed no sex differences between the groups on the perceptions of cohesion. On the other hand, except for individual attractions to the group-task dimension, participants of martial art classes had higher levels of group cohesion than the participants of aerobic-like classes. Consequently, it was concluded that different types of exercise classes may have different levels of cohesion and those differences were discussed within the context of exercise classes.

  1. Group cohesion in exercise classes: An examination of gender and type of exercise class differences

    Directory of Open Access Journals (Sweden)

    Selçuk Akpınar

    2011-10-01

    Full Text Available Group cohesion has been attributed to the higher levels of attendance and performance and lower levels of drop-outs in exercise classes. Cohesion can be affected by different type of exercise classes and gender. Therefore, the main purpose of the study was to compare the group cohesion levels of martial arts participants (aikido, taekwondo, karate, and kendo with aerobic-like participants (aerobics, aero-steps, phys-gym, and high-low aerobics. This causal comparative study also aimed at examining gender differences in group cohesion in exercise classes. There were 140 participants (Mage=28.1 SD= 8.01 and female= 138 male= 2 in aerobic-like classes and 137 participants (Mage= 22.2 SD= 3.8 and female= 48 male= 89 in martial arts classes. Results revealed no gender differences between the groups on the perceptions of cohesion. On the other hand, except for individual attractions to the group-task dimension, participants of martial art classes had higher levels of group cohesion than the participants of aerobic-like classes. Consequently, it was concluded that different types of exercise classes may have different levels of cohesion and those differences were discussed within the context of exercise classes

  2. Getting Started: Informal Small-Group Strategies in Large Classes.

    Science.gov (United States)

    Cooper, James L.; Robinson, Pamela

    2000-01-01

    Describes a number of informal "turn-to-your-neighbor" approaches that create an active learning environment in college lecture settings. These include: launching class in discussion, breaking up the lecture for comprehension checks, closing class with small-group conversation, and debriefing exams. (DB)

  3. Characteristic Classes and Integrable Systems for Simple Lie Groups

    CERN Document Server

    Levin, A; Smirnov, A; Zotov, A

    2010-01-01

    This paper is a continuation of our previous paper \\cite{LOSZ}. For simple complex Lie groups with non-trivial center, i.e. classical simply-connected groups, $E_6$ and $E_7$ we consider elliptic Modified Calogero-Moser systems corresponding to the Higgs bundles with an arbitrary characteristic class. These systems are generalization of the classical Calogero-Moser (CM) systems related to a simple Lie groups and contain CM systems related to some (unbroken) subalgebras. For all algebras we construct a special basis, corresponding to non-trivial characteristic classes, the explicit forms of Lax operators and Hamiltonians.

  4. On a Class of p-Soluble Groups

    Institute of Scientific and Technical Information of China (English)

    A. Ballester-Bolinches; R. Esteban-Romero; M.C. Pedraza-Aguilera

    2005-01-01

    Let p be a prime. The class of all p-soluble groups G such that every p-chief factor of G is cyclic and all p-chief factors of G are G-isomorphic is studied in this paper.Some results on T-, PT-, and PST-groups are also obtained.

  5. Finite Groups with Three Conjugacy Class Sizes of some Elements

    Indian Academy of Sciences (India)

    Qingjun Kong

    2012-08-01

    Let be a finite group. We prove as follows: Let be a -solvable group for a fixed prime . If the conjugacy class sizes of all elements of primary and biprimary orders of are $\\{1,p^a,n\\}$ with and two positive integers and (,)=1, then is -nilpotent or has abelian Sylow -subgroups.

  6. Ideal Class Groups and Subgroups of Real Quadratic Function Fields

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    In this paper, we study the real quadratic function fields K=k(D), given a necessary and sufficient condition for the ideal class group H(K) of any real quadratic function field K to have a cyclic subgroup of order n, and obtained eight series of such fields. The ideal class numbers h(OK) of K in the series all have a factor n.

  7. Reducibility of quantum representations of mapping class groups

    DEFF Research Database (Denmark)

    Andersen, Jørgen Ellegaard; Fjelstad, Jens

    2010-01-01

    In this paper we provide a general condition for the reducibility of the Reshetikhin–Turaev quantum representations of the mapping class groups. Namely, for any modular tensor category with a special symmetric Frobenius algebra with a non-trivial genus one partition function, we prove that the qu......In this paper we provide a general condition for the reducibility of the Reshetikhin–Turaev quantum representations of the mapping class groups. Namely, for any modular tensor category with a special symmetric Frobenius algebra with a non-trivial genus one partition function, we prove...... that the quantum representations of all the mapping class groups built from the modular tensor category are reducible. In particular, for SU(N) we get reducibility for certain levels and ranks. For the quantum SU(2) Reshetikhin–Turaev theory we construct a decomposition for all even levels. We conjecture...

  8. Some special classes of n-abelian groups

    Directory of Open Access Journals (Sweden)

    Costantino Delizia

    2012-06-01

    Full Text Available Let n be an integer. A group G is said to be n-abelian if the map phi_n that sends g to g^n is an endomorphism of G. Then (xy^n=x^ny^n for all x,y in G, from which it follows [x^n,y]=[x,y]^n=[x,y^n]. It is also easy to see that a group G is n-abelian if and only if it is (1-n-abelian. If nneq 0,1 and G is an n-abelian group, then the quotient group G/Z(G has finite exponent dividing n(n-1. This implies that every torsion-free n-abelian group is abelian. We denote by B_n and C_n the classes of all groups G for which phi_n is a monomorphism and an epimorphism of G, respectively. Then B_0=C_0 contains only the trivial group, B_1=C_1 is the class of all groups, and B_-1=C_-1 is the class of all abelian groups. Furthermore, with |n|>1, G is in B_n if and only if G is an n-abelian group having no elements of order dividing |n|. Similarly, G is in C_n if and only if G is n-abelian and for every g in G there exists an element x in G such that g=x^n. We also set A_n=B_ncap C_n. In this paper we give a characterization for groups in B_n and for groups in C_n. We also obtain an arithmetic description of the set of all integers n such that a group G is in A_n.

  9. A Poisson type formula for Hardy classes on Heisenberg's group

    Directory of Open Access Journals (Sweden)

    Lopushansky O.V.

    2010-06-01

    Full Text Available The Hardy type class of complex functions with infinite many variables defined on the Schrodinger irreducible unitary orbit of reduced Heisenberg group, generated by the Gauss density, is investigated. A Poisson integral type formula for their analytic extensions on an open ball is established. Taylor coefficients for analytic extensions are described by the associatedsymmetric Fock space.

  10. Conjugacy Class Sizes and Solvability of Finite Groups

    Indian Academy of Sciences (India)

    Qinhui Jiang; Changguo Shao

    2013-05-01

    Let be a finite group and * be the set of primary, biprimary and triprimary elements of . We prove that if the conjugacy class sizes of * are {1,,,} with positive coprime integers and ,then is solvable. This extends a recent result of Kong (Manatsh. Math. 168(2)(2012) 267–271).

  11. Isomorphism classes and automorphism groups of algebras of Weyl type

    Institute of Scientific and Technical Information of China (English)

    SU; Yucai(苏育才); ZHAO; Kaiming(赵开明)

    2002-01-01

    In one of our recent papers, the associative and the Lie algebras of Weyl type A[D] = A F[D] were defined and studied, where A is a commutative associative algebra with an identity element over a field F of any characteristic, and F[D] is the polynomial algebra of a commutative derivation subalgebra D of A. In the present paper, a class of the above associative and Lie algebras A[D] with F being a field of characteristic 0, D consisting of locally finite but not locally nilpotent derivations of A, are studied. The isomorphism classes and automorphism groups of these associative and Lie algebras are determined.

  12. Twisted Conjugacy Classes in Abelian Extensions of Certain Linear Groups

    CERN Document Server

    Mubeena, T

    2011-01-01

    Given an automorphism $\\phi:\\Gamma\\lr \\Gamma$, one has an action of $\\Gamma$ on itself by $\\phi$-twisted conjugacy, namely, $g.x=gx\\phi(g^{-1})$. The orbits of this action are called $\\phi$-twisted conjugacy classes. One says that $\\Gamma$ has the $R_\\infty$-property if there are infinitely many $\\phi$-twisted conjugacy classes for every automorphism $\\phi$ of $\\Gamma$. In this paper we show that $\\SL(n,\\bz)$ and its congruence subgroups have the $R_\\infty$-property. Further we show that any (countable) abelian extension of $\\Gamma$ has the $R_\\infty$-property where $\\Gamma$ is a torsion free non-elementary hyperbolic group, or $\\SL(n,\\bz), \\Sp(2n,\\bz)$ or a principal congruence subgroup of $\\SL(n,\\bz)$ or the fundamental group of a complete Riemannian manifold of constant negative curvature.

  13. Class-preserving automorphisms of some finite -groups

    Indian Academy of Sciences (India)

    Deepak Gumber; Mahak Sharma

    2015-05-01

    Let be a finite -group of order 5, where is a prime. We give necessary and sufficient conditions on such that has a non-inner class-preserving automorphism. As a consequence, we give short and alternate proofs of results of Yadav (§5 of Proc. Indian Acad. Sci. (Math. Sci.) 118 (2008) 1–11) and Kalra and Gumber (Theorem 4.2 of Indian J. Pure Appl. Math. 44 (2013) 711–725).

  14. Dehn twists and free subgroups of symplectic mapping class groups

    CERN Document Server

    Keating, Ailsa

    2012-01-01

    Given two Lagrangian spheres in an exact symplectic manifold, we find conditions under which the Dehn twists about them generate a free non-abelian subgroup of the symplectic mapping class group. This extends a result of Ishida for Riemann surfaces. The proof generalises the categorical version of Seidel's long exact sequence to arbitrary powers of a fixed Dehn twist. We also show that the Milnor fibre of any isolated degenerate hypersurface singularity contains such pairs of spheres.

  15. Cohomology of mapping class groups and the abelian moduli space

    DEFF Research Database (Denmark)

    Andersen, Jørgen Ellegaard; Villemoes, Rasmus

    2012-01-01

    We consider a surface Σ of genus g≥3 , either closed or with exactly one puncture. The mapping class group Γ of Σ acts symplectically on the abelian moduli space M=Hom(π 1 (Σ),U(1))=Hom(H 1 (Σ),U(1)) , and hence both L 2 (M) and C ∞ (M) are modules over Γ . In this paper, we prove that both the c...

  16. Invariant generalized ideal classes - structure theorems for $p$-class groups in $p$-extensions

    Indian Academy of Sciences (India)

    Georges Gras

    2017-02-01

    We give, in sections 2 and 3, an english translation of: Classes g\\acute{e}n\\acute{e}ralis\\acute{e}es invariantes, J. Math. Soc. Japan, 46, 3 (1994), with some improvements and with notations and definitions in accordance with our book: Class Field Theory: From Theory to Practice, SMM, Springer-Verlag, 2nd corrected printing 2005. We recall, in section 4, some structure theorems for finite $\\mathbb{Z}_p[G]$-modules ($G\\simeq\\mathbb{Z}/p\\mathbb{Z}$) obtained in: Sur les$\\scr l$-classes d’id\\acute{e}aux dans les extensions cycliques relatives de degr\\acute{e} premier $\\mathcal{l}$, Annales de l’Institut Fourier, 23, 3 (1973). Then we recall the algorithm of local normic computations which allows to obtain the order and (potentially) the structure of a $p$-class group in a cyclic extension of degree $p$. In section 5, we apply this to the study of the structure of relative $p$-class groups of Abelian extensions of prime to $p$ degree, using the Thaine–Ribet–Mazur–Wiles–Kolyvagin ‘principal theorem’, and the notion of ‘admissible sets of prime numbers’ in a cyclic extension of degree $p$, from: Sur la structure des groupes de classes relatives, Annales de l’Institut Fourier, 43, 1 (1993). In conclusion, we suggest the study, in the same spirit, of some deep invariants attached to the $p$-ramification theory (as dual form of non-ramification theory) and which have become standard in a $p$-adic framework. Since some of these techniques have often been rediscovered, we give a substantial (but certainly incomplete) bibliography which may be used to have a broad view on the subject.

  17. Embedding mapping class groups into finite products of trees

    OpenAIRE

    Hume, David

    2012-01-01

    We prove the equivalence between a relative bottleneck property and being quasi-isometric to a tree-graded space. As a consequence, we deduce that the quasi-trees of spaces defined axiomatically by Bestvina-Bromberg-Fujiwara are quasi-isometric to tree-graded spaces. Using this we prove that mapping class groups quasi-isometrically embed into a finite product of simplicial trees. In particular, these groups have finite Assouad-Nagata dimension, direct embeddings exhibiting $\\ell^p$ compressio...

  18. Generating the Mobius group with involution conjugacy classes

    CERN Document Server

    Basmajian, Ara

    2010-01-01

    A {\\it $k$-involution} is an involution with a fixed point set of codimension $k$. The conjugacy class of such an involution, denoted $S_k$, generates $\\text{M\\"ob}(n)$-the the group of isometries of hyperbolic $n$-space-if $k$ is odd, and its orientation preserving subgroup if $k$ is even. In this paper, we supply effective lower and upper bounds for the $S_k$ word length of $\\text{M\\"ob}(n)$ if $k$ is odd, and the $S_k$ word length of $\\text{M\\"ob}^+(n)$, if $k$ is even. As a consequence, for a fixed codimension $k$ the length of $\\text{M\\"ob}^{+}(n)$ with respect to $S_k$, $k$ even, grows linearly with $n$ with the same statement holding in the odd case. Moreover, the percentage of involution conjugacy classes for which $\\text{M\\"ob}^{+}(n)$ has length two approaches zero, as $n$ approaches infinity.

  19. Conjugacy classes of periodic elements in Garside groups

    CERN Document Server

    Lee, Eon-Kyung

    2010-01-01

    Let $G$ be a Garside group with Garside element $\\Delta$. An element $g\\in G$ is said to be 'periodic' if some power of it is a power of $\\Delta$. In this paper, we study the conjugacy classes of periodic elements in Garside groups. By a classical theorem of Brouwer, Kerekjarto and Eilenberg, an $n$-braid is periodic if and only if it is conjugate to a power of one of two specific roots of $\\Delta^2$. We generalize this to Garside groups by showing that every periodic element is conjugate to a power of a root of $\\Delta^m$ where $\\Delta^m$ is the minimal positive power of $\\Delta$ which is central. For periodic elements in Garside groups, we introduce the notions of slimness and precentrality, and show that the super summit set of a slim, precentral periodic element is closed under any partial cycling. For the conjugacy problem, we may assume the slimness without loss of generality. For the Artin groups of type $A_n$, $B_n$, $D_n$, $I_2(e)$ and the braid group of the complex reflection group of type $(e,e,n)$...

  20. Centralizers of Camina $p$-groups of nilpotence class $3$

    OpenAIRE

    Lewis, Mark L.

    2015-01-01

    Let $G$ be a Camina $p$-group of nilpotence class $3$. We prove that if $G' < C_G (G')$, then $|Z(G)| \\le |G':G_3|^{1/2}$. We also prove that if $G/G_3$ has only one or two abelian subgroups of order $|G:G'|$, then $G' < C_G (G')$. If $G/G_3$ has $p^a + 1$ abelian subgroups of order $|G:G'|$, then either $G' < C_G (G')$ or $|Z(G)| \\le p^{2a}$.

  1. Higher genus mapping class group invariants from factorizable Hopf algebras

    CERN Document Server

    Fuchs, Jurgen; Stigner, Carl

    2012-01-01

    Lyubashenko's construction associates representations of mapping class groups Map_{g,n} of Riemann surfaces of any genus g with any number n of holes to a factorizable ribbon category. We consider this construction as applied to the category of bimodules over a finite-dimensional factorizable ribbon Hopf algebra H. For any such Hopf algebra we find an invariant of Map_{g,n} for every g and n. More generally, we obtain such invariants for any pair (H,omega), where omega is a ribbon automorphism of H. Our results are motivated by the quest to understand correlation functions of bulk fields in two-dimensional conformal field theories with chiral algebras that are not necessarily semisimple, so-called logarithmic conformal field theories.

  2. Using a Virtual Class to Demonstrate Computer-Mediated Group Dynamics Concepts

    Science.gov (United States)

    Franz, Timothy M.; Vicker, Lauren A.

    2010-01-01

    We report about an active learning demonstration designed to use a virtual class to present computer-mediated group communication course concepts to show that students can learn about these concepts in a virtual class. We designated 1 class period as a virtual rather than face-to-face class, when class members "attended" virtually using…

  3. Student Attitudes Towards Change From Ability Grouping To Heterogeneous Grouping At A University Class

    Directory of Open Access Journals (Sweden)

    Mustafa Bahar

    2015-04-01

    Full Text Available There is ample research on student grouping at primary, middle and high school level but it is a controversial issue for universities educating the high and low achievers in the same classes, reflecting confusion about whether scholarship and tuition fee students should be taught together. This study aims to shed light on what the student population at university thinks about heterogeneous grouping after seeing effects of ability grouping, about which there is almost no evidence. Students in an undergraduate department who started the academic year at two different sections grouped according to their prior achievement took courses in mixed ability classes the following semesters. They were given a questionnaire in three intervals asking them about their expectations and opinions of grouping before and after mixing and then after one year of study. 45 students responded to any two questionnaires and 15 responded to all three questionnaires. For the repeated measures design, Friedman test was carried out to see the change of ideas from time1 to time3 and Mann-Witney U test was used to see the differences in ideas between scholarship students and tuition-fee students. MannWhitney U test was carried out to test whether there was a difference in the GPAs of scholarship and tuition-fee students between time1 and time3. Students expressed a change in their attitudes about achievement and how the other group influenced them. GPAs of high ability students increased after they started being in educated in mixed ability class, realizing the fears of low achievers.

  4. Creative class as the leading group of modern society

    Directory of Open Access Journals (Sweden)

    O. Y. Sakalo

    2015-06-01

    Full Text Available In the article one of the modern approaches to the social structure of the society is considered. The creative class is determined as the main driving force and as a leading social class of modern society. The author studies the history of the concept of creative class, and R. Florida’s concept in particular, and determines its characteristics and peculiarities. The influence of the creative class on the society, on its transformation processes, and the system of social values is analyzed. The role of creative class in developing creative and innovative economy of the post­industrial society era is found out. The author considers the relationship between the creative class and the other social classes of modern society. The essence of the concept of creativity is defined, and one of the most important problems of the modern era that is a constant conflict between creativity and organization is examined. The comparative historical analysis of the so­called «institutional»/ «industrial» and «creative»/ «post­industrial» era is made. The role of the creative class in developing and social changing the modern American society is studied. The questions of forming and developing creative class in modern Ukrainian society are analyzed, and the peculiarities and problems of this process are figured out. The need of state support for forming national creative class, for its strengthening and growth is emphasized.

  5. On the 16-rank of class groups of quadratic number fields

    NARCIS (Netherlands)

    Milovic, D.

    2016-01-01

    We prove two new density results about 16-ranks of class groups of quadratic number fields. They can be stated informally as follows. Let C(D) denote the class groups of the quadratic number field of discriminant D. Theorem A. The class group C(-4p) has an element of order 16 for one-fourth of pri

  6. On the 16-rank of class groups of quadratic number fields

    NARCIS (Netherlands)

    Milovic, D.

    2016-01-01

    We prove two new density results about 16-ranks of class groups of quadratic number fields. They can be stated informally as follows. Let C(D) denote the class groups of the quadratic number field of discriminant D. Theorem A. The class group C(-4p) has an element of order 16 for one-fourth of

  7. Teacher Perceptions of Heterogeneous Ability Grouping in Secondary Classes

    Science.gov (United States)

    O'Rourke, Nicole Cox

    2013-01-01

    In an effort to provide the best academic opportunities for all students, many high schools create heterogeneous classes by removing existing academic tracks or by offering only 1 level of course. Research has indicated that separating students by ability often exacerbates existing academic inequity; however, mixed ability classes can also create…

  8. 49 CFR 173.141 - Class 9-Assignment of packing group.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Class 9-Assignment of packing group. 173.141...-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Definitions Classification, Packing Group Assignments... packing group. The packing group of a Class 9 material is as indicated in column 5 of the § 172.101 table....

  9. 49 CFR 173.125 - Class 4-Assignment of packing group.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Class 4-Assignment of packing group. 173.125...-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Definitions Classification, Packing Group Assignments... packing group. (a) The packing group of a Class 4 material is assigned in column (5) of the §...

  10. 49 CFR 173.121 - Class 3-Assignment of packing group.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Class 3-Assignment of packing group. 173.121...-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Definitions Classification, Packing Group Assignments... packing group. (a) The packing group of a Class 3 material is as assigned in column 5 of the §...

  11. 49 CFR 173.137 - Class 8-Assignment of packing group.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Class 8-Assignment of packing group. 173.137...-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Definitions Classification, Packing Group Assignments... packing group. The packing group of a Class 8 material is indicated in Column 5 of the § 172.101...

  12. THE EFFECT OF BETWEEN CLASS ABILITY GROUPING ON SCIENCE ACADEMIC ACHIEVEMENT AND SELF ESTEEM OF SIXTH CLASS STUDENTS

    OpenAIRE

    Karademir, Çigdem Aldan

    2009-01-01

    The aim of this research is to expose the effects of between class ability grouping on science academic achievement and self esteem of sixth class students. As a result, according to the achievement test, there couldn't be found a meaningful difference between the experiment and the control group (p>0.05), beside this there was found a meaningful difference between high, medium and low classes (p0.05). According to the Rosenberg Self Esteem Scale, there couldn't be found a meaningful ...

  13. Binnendifferenzierung im Urteil von Gesamtschullehrern = Comprehensive School Teachers on Within-Class Grouping.

    Science.gov (United States)

    Roeder, Peter M.

    1997-01-01

    Analyzes teachers' attitudes regarding the value and practicality of adapting their teaching to the needs of heterogeneous classes. Surveys teachers and administrators in five German comprehensive schools. Finds that teachers do not support the view that within-class grouping may be a viable alternative to systems of across-class setting by…

  14. Gateway to Success for At-Risk Students in a Large-Group Introductory Chemistry Class

    Science.gov (United States)

    Mason, Diana; Verdel, Ellen

    2001-02-01

    Thirty-six entering freshmen of a designated "at-risk" population were divided between two classes of introductory chemistry for nonscience majors. Seventeen students were placed in a typical large-group lecture (n = 210) class, and the remaining 19 were placed in a special class with enrollment restricted to the selected, at-risk students. To assure equity and control for consistency, both lecture classes met at the same time. The two female instructors gave the same lectures to each class. At-risk students from both sections were required to attend supplemental instruction sections led by the same teaching assistant, and the same instructor graded all assignments. Students of both classes were encouraged to form informal collaborative groups to complete 10 in-class problem sets, which were graded on an individual basis. The at-risk students from the large-group lecture (average = 75.5) outperformed students enrolled in the special class (average = 70.6). All targeted students were successful in the large-group lecture class; however, three at-risk students in the smaller class were unsuccessful. Scaffolding from a more diverse population in the larger group may be one reason for this unexpected outcome. In the larger lecture class, students rated the collaborative assignments as being most beneficial to their success.

  15. Piano Performance: Group Classes for the Lifelong Learner

    Science.gov (United States)

    Haddon, Elizabeth

    2017-01-01

    This qualitative research presents data relating to eight amateur pianists who completed a 10-week Piano Performance course for lifelong learners at the University of York, UK. This article discusses the development of learning through the impact of group participation, challenges faced by learners and pedagogical strategies used by the leader to…

  16. Characteristics of Motivated L2 Class Groups: From Language Teachers' and Students' Perspectives

    Science.gov (United States)

    Chang, Lilian Ya-hui

    2014-01-01

    In most learning situations, learners are learning with their peers, and the teacher is teaching to a class, not to an individual learner. As it is indisputable that learners conceptualize their learning as occurring in a group, it is logical to assume that the class group has some effect on learners' learning. Thus, it could be constructive to…

  17. The G protein-coupled receptor, class C, group 6, subtype A (GPRC6A) receptor

    DEFF Research Database (Denmark)

    Clemmensen, C; Smajilovic, S; Wellendorph, P;

    2014-01-01

    GPRC6A (G protein-coupled receptor, class C, group 6, subtype A) is a class C G protein-coupled receptor, that has been cloned from human, mouse and rat. Several groups have shown that the receptor is activated by a range of basic and small aliphatic L-α-amino acids of which L-arginine, L...

  18. Subgroups of ideal class groups of real quadratic algebraic function fields

    Institute of Scientific and Technical Information of China (English)

    WANG; Kunpeng(王鲲鹏); ZHANG; Xianke(张贤科)

    2003-01-01

    Necessary and sufficient condition on real quadratic algebraic function fields K is given for theirideal class groups H(K) to contain cyclic subgroups of order n. And eight series of such real quadratic functionfields K are obtained whose ideal class groups contain cyclic subgroups of order n. In particular, the ideal classnumbers of these function fields are divisible by n.

  19. The Impact of Group Diversity on Class Performance: Evidence from College Classrooms

    Science.gov (United States)

    Hansen, Zeynep; Owan, Hideo; Pan, Jie

    2015-01-01

    We combine class performance data from an undergraduate management course with students' personal records to examine how group diversity affects group work performance and individual learning. Students are exogenously assigned to groups. We find that, on average, male-dominant groups performed worse in their group work and learned less (based…

  20. The Impact of Group Diversity on Class Performance: Evidence from College Classrooms

    Science.gov (United States)

    Hansen, Zeynep; Owan, Hideo; Pan, Jie

    2015-01-01

    We combine class performance data from an undergraduate management course with students' personal records to examine how group diversity affects group work performance and individual learning. Students are exogenously assigned to groups. We find that, on average, male-dominant groups performed worse in their group work and learned less (based…

  1. 49 CFR 173.129 - Class 5, Division 5.2-Assignment of packing group.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Class 5, Division 5.2-Assignment of packing group... SHIPPERS-GENERAL REQUIREMENTS FOR SHIPMENTS AND PACKAGINGS Definitions Classification, Packing Group... 5.2—Assignment of packing group. All Division 5.2 materials are assigned to Packing Group II...

  2. A kind of signature scheme based on class groups of quadratic fields

    Institute of Scientific and Technical Information of China (English)

    董晓蕾; 曹珍富

    2004-01-01

    Quadratic-field cryptosystem is a cryptosystem built from discrete logarithm problem in ideal class groups of quadratic fields(CL-DLP). The problem on digital signature scheme based on ideal class groups of quadratic fields remained open, because of the difficulty of computing class numbers of quadratic fields. In this paper, according to our researches on quadratic fields, we construct the first digital signature scheme in ideal class groups of quadratic fields, using q as modulus, which denotes the prime divisors of ideal class numbers of quadratic fields. Security of the new signature scheme is based fully on CL-DLP. This paper also investigates realization of the scheme, and proposes the concrete technique. In addition, the technique introduced in the paper can be utilized to realize signature schemes of other kinds.

  3. The Power Structure of 2-Generator 2-Groups of Class Two

    Institute of Scientific and Technical Information of China (English)

    Friedrich L. Kluempen

    2002-01-01

    In 1934, Hall introduced regular p-groups. Any regular 2-group is abelian. A regular p-group is power closed, exponent closed, strongly semi-pabelian, and an exact power margin group. The study of these properties and relationships among them constitutes the investigation of the power structure of a p-group. In this paper, we classify 2-generator 2-groups of nilpotency class two according to their power structure.

  4. Which Setting to Choose: Comparison of Whole-Class vs. Small-Group Computer Simulation Use

    Science.gov (United States)

    Smetana, Lara K.; Bell, Randy L.

    2014-01-01

    Studies considering whole-class use of computer simulations are limited, despite the increasing interest in this mode of use. The current study explored how a collection of computer simulations was integrated into both whole-class and small-group instructional settings during a high school chemistry unit on atomic structure. Participants included…

  5. Class-Wide Function-Related Intervention Teams: Effects of Group Contingency Programs in Urban Classrooms

    Science.gov (United States)

    Kamps, Debra; Wills, Howard P.; Heitzman-Powell, Linda; Laylin, Jeff; Szoke, Carolyn; Petrillo, Tai; Culey, Amy

    2011-01-01

    The purpose of the study was to determine the effectiveness of the Class-Wide Function-related Intervention Teams (CW-FIT) program, a group contingency intervention for whole classes, and for students with disruptive behaviors who are at risk for emotional/behavioral disorders (EBD). The CW-FIT program includes four elements designed from…

  6. The School Attitudes of a Group of Working-Class Girls.

    Science.gov (United States)

    Stebbins, Susan

    Ethnographic field research done with a group of working class girls in upstate New York examined the structures of schools that maintain gender and class distinctions and the culture of the girls themselves. Most of the field work was participant-observation at after-school and summer programs at a Girls Incorporated site in a mid-sized…

  7. Equidistribution of geodesics on homology classes and analogues for free groups

    DEFF Research Database (Denmark)

    Petridis, Y.N.; Risager, Morten

    2005-01-01

    We investigate how often geodesics have homology in a fixed set of the homology lattice of a compact Riemann surface. We prove that closed geodesics are equidistributed on a random set of homology classes and certain arithmetic sets. We explain the analogues for free groups, conjugacy classes...

  8. Medical students perceive better group learning processes when large classes are made to seem small.

    Directory of Open Access Journals (Sweden)

    Juliette Hommes

    Full Text Available OBJECTIVE: Medical schools struggle with large classes, which might interfere with the effectiveness of learning within small groups due to students being unfamiliar to fellow students. The aim of this study was to assess the effects of making a large class seem small on the students' collaborative learning processes. DESIGN: A randomised controlled intervention study was undertaken to make a large class seem small, without the need to reduce the number of students enrolling in the medical programme. The class was divided into subsets: two small subsets (n=50 as the intervention groups; a control group (n=102 was mixed with the remaining students (the non-randomised group n∼100 to create one large subset. SETTING: The undergraduate curriculum of the Maastricht Medical School, applying the Problem-Based Learning principles. In this learning context, students learn mainly in tutorial groups, composed randomly from a large class every 6-10 weeks. INTERVENTION: The formal group learning activities were organised within the subsets. Students from the intervention groups met frequently within the formal groups, in contrast to the students from the large subset who hardly enrolled with the same students in formal activities. MAIN OUTCOME MEASURES: Three outcome measures assessed students' group learning processes over time: learning within formally organised small groups, learning with other students in the informal context and perceptions of the intervention. RESULTS: Formal group learning processes were perceived more positive in the intervention groups from the second study year on, with a mean increase of β=0.48. Informal group learning activities occurred almost exclusively within the subsets as defined by the intervention from the first week involved in the medical curriculum (E-I indexes>-0.69. Interviews tapped mainly positive effects and negligible negative side effects of the intervention. CONCLUSION: Better group learning processes can be

  9. Species, functional groups, and habitat preferences of birds in five agroforestry classes in Tabasco, Mexico

    NARCIS (Netherlands)

    Wal, van der J.C.; Peña-Álvarez, B.; Arriaga-Weiss, S.L.; Hernández-Daumás, S.

    2012-01-01

    We studied species, functional groups, and habitat preferences of birds in five classes of agroforestry systems: agroforests, animal agroforestry, linear agroforestry, sequential agroforestry, and crops under tree cover in Tabasco, Mexico. Sampling sites were >2 km from natural forest fragments.

  10. Species, functional groups, and habitat preferences of birds in five agroforestry classes in Tabasco, Mexico

    NARCIS (Netherlands)

    Wal, van der J.C.; Peña-Álvarez, B.; Arriaga-Weiss, S.L.; Hernández-Daumás, S.

    2012-01-01

    We studied species, functional groups, and habitat preferences of birds in five classes of agroforestry systems: agroforests, animal agroforestry, linear agroforestry, sequential agroforestry, and crops under tree cover in Tabasco, Mexico. Sampling sites were >2 km from natural forest fragments.

  11. Group Classification and Exact Solutions of a Class of Variable Coefficient Nonlinear Wave Equations

    Institute of Scientific and Technical Information of China (English)

    HUANG Ding-Jiang; MEI Jian-Qin; ZHANG Hong-Qing

    2009-01-01

    Complete group classification of a class of variable coefficient (1 + 1)-dimensional wave equations is performed.The possible additional equivalence transformations between equations from the class under consideration and the conditional equivalence groups are also investigated. These allow simplification of the results of the classification and further applications of them. The derived Lie symmetries are used to construct exact solutions of special forms of these equations via the classical Lie method. Nonclassical symmetries of the wave equations are discussed.

  12. Improvements in the computation of ideal class groups of imaginary quadratic number fields

    CERN Document Server

    Biasse, Jean-François

    2012-01-01

    We investigate improvements to the algorithm for the computation of ideal class groups described by Jacobson in the imaginary quadratic case. These improvements rely on the large prime strategy and a new method for performing the linear algebra phase. We achieve a significant speed-up and are able to compute ideal class groups with discriminants of 110 decimal digits in less than a week.

  13. Right-angled Artin groups and a generalized isomorphism problem for finitely generated subgroups of mapping class groups

    CERN Document Server

    Koberda, Thomas

    2010-01-01

    Consider the mapping class group $\\Mod_{g,n}$ of a surface of finite type and a finite collection $F$ of mapping classes. In this paper we prove that there are positive exponents such that after replacing the elements of $F$ by the corresponding powers, they generate a right-angled Artin group. Under some further suitable hypotheses, these mapping classes are the vertex generators of the underlying graph, or form a right-angled Artin system in the terminology which we shall develop. We prove an analogous result for a finite volume real and complex hyperbolic $n$-manifolds, thus establishing the primary result as a rank one type phenomenon for the mapping class group. We also show the unsolvability of the isomorphism problem for finitely generated subgroups of $\\Mod_{g,n}$, and prove a homological rigidity result for right-angled Artin groups which implies a solution to the isomorphism problem for right-angled Artin groups. We thus solve a generalized isomorphism problem for finitely generated subgroups of $\\M...

  14. [Latent classes of personality disorders: group comparisons and course of psychotherapy].

    Science.gov (United States)

    Lange, Julia; Schöttke, Henning

    2013-09-01

    Using latent class analysis the Personality Disorder Screening (PDS) classifies patients into 4 groups: personality disordered (PD) patients (PDS+), healthy patients (PDS -) and 2 hybrid classes with exaggerated personality styles (histrionic/dependent and avoidant/obsessive-compulsive). The present study investigated if the PDS groups differ concerning sociodemographic and clinical variables, psychological distress and treatment outcome. We analyzed the PDS response patterns of 555 outpatients. PDS+ group membership is associated with typical PD characteristics, chronic depression and a high level of general psychological distress. Patients of both hybrid classes are found to show average psychological distress. The treatment was effective for all patients. Membership in the histrionic/dependent hybrid class is associated with early drop out from outpatient therapy.

  15. Groups in Which 2-Generator Subgroups Are Nilpotent of Bounded Class

    Institute of Scientific and Technical Information of China (English)

    Costantino Delizia

    2001-01-01

    In this paper, we study some properties of groups in which subgroups with a fixed number of generators are nilpotent. In particular, we discuss nilpotency of torsion-free groups in which 2-generator subgroups are nilpotent of class at most 4.

  16. A new class of group field theories for 1st order discrete quantum gravity

    NARCIS (Netherlands)

    Oriti, D.; Tlas, T.

    2008-01-01

    Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we construct a new class of Group Field Theory models, for any choice of spacetime dimension and signature, whose Feynman

  17. A new class of group field theories for 1st order discrete quantum gravity

    NARCIS (Netherlands)

    Oriti, D.; Tlas, T.

    2008-01-01

    Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we construct a new class of Group Field Theory models, for any choice of spacetime dimension and signature, whose Feynman a

  18. Topological Representations of $U_q(sl_2)$ on the Torus and the Mapping Class Group

    CERN Document Server

    Crivelli, M; Wieczerkowski, C; Felder, Giovanni

    1993-01-01

    We compute the mapping class group action on cycles on the configuration space of the torus with one puncture, with coefficients in a local system arising in conformal field theory. This action commutes with the topological action of the quantum group $U_q(sl_2)$, and is given in vertex form.

  19. A new class of group field theories for 1st order discrete quantum gravity

    NARCIS (Netherlands)

    Oriti, D.; Tlas, T.

    2008-01-01

    Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we construct a new class of Group Field Theory models, for any choice of spacetime dimension and signature, whose Feynman a

  20. The genus one Complex Quantum Chern-Simons representation of the Mapping Class Group

    DEFF Research Database (Denmark)

    Andersen, Jørgen Ellegaard; Marzioni, Simone

    In this paper we compute explicitly, following Witten’s prescription, the quantum representation of the mapping class group in genus one for complex quantum Chern-Simons theory associated to the complex gauge group SL(2, C). We use the k’th order Weil-Gel’fand-Zak transform to exhibit an explicit...

  1. Comparison of Intercanine and Intermolar Width Between Cleft Lip Palate and Normal Class I Occlusion Group.

    Science.gov (United States)

    Wahaj, Aiyesha; Ahmed, Imtiaz

    2015-11-01

    To determine the mean difference of arch dimensions (both intercanine and intermolar width) between cleft lip palate and normal class I occlusion group. Cross-sectional analytic study. Dr. Ishrat-ul-Ebad Khan Institute of Oral Health Sciences, [Dow University of Health Sciences (DUHS)], Karachi, from March 2012 to April 2013. Group 1 consisted of 32 subjects with complete repaired, non-syndromic unilateral and bilateral cleft lip palate. Group 2 consisted of 32 subjects with normal facial morphology and class I occlusion. Exclusion criteria were cleft lip palate subjects with systemic diseases, any arch expansion procedure, incomplete repaired palate, open fistulas, developmental or acquired craniofacial muscular deformities, autoimmune conditions, syndromes, endocrine abnormalities, neurological problems, or previous history of orthodontic treatment and signs and symptoms of temporomandibular disorders, history of trauma, impacted or missing teeth, periodontally involved teeth, subdivision molar classification, skeletal base II and III with molar class I. The transverse width (intercanine and intermolar width) of dental casts was measured with the help of digital caliper. The intercanine width was measured between cusp tips of the canine while the intermolar width distance was measured between mesiobuccal cusp tips of first molars, and buccal grooves of the mandibular first molars in both cleft lip palate and normal class I occlusion group, respectively. There were 64 subjects with mean 14.7 ±6.8 years in the cleft palate and 14.7 ±6.3 years in the normal group. There was statistically significant differences found between intercanine and intermolar width in maxillary arch (p < 0.001). In mandibular arch, only intercanine width has showed significant difference (p < 0.001) between cleft and normal occlusion class I group. Maxillary and mandibular intercanine width was found to be significantly reduced in cleft lip palate group (both unilateral and bilateral) as

  2. Realization of a certain class of semi-groups as value semi-groups of valuations

    OpenAIRE

    M. Moghaddam

    2008-01-01

    Given a well-ordered semi-group $\\Gamma$ with a minimal system of generators of ordinal type at most $\\omega n$ and of rational rank $r$, which satisfies a positivity and increasing condition, we construct a zero-dimensional valuation centered on the ring of polynomials with $r$ variables such that the semi-group of the values of the polynomial ring is equal to $\\Gamma$. The construction uses a generalization of Favre and Jonsson's version of MacLane's sequence of key-polynomials.

  3. Common Mental Disorders among Occupational Groups: Contributions of the Latent Class Model

    Directory of Open Access Journals (Sweden)

    Kionna Oliveira Bernardes Santos

    2016-01-01

    Full Text Available Background. The Self-Reporting Questionnaire (SRQ-20 is widely used for evaluating common mental disorders. However, few studies have evaluated the SRQ-20 measurements performance in occupational groups. This study aimed to describe manifestation patterns of common mental disorders symptoms among workers populations, by using latent class analysis. Methods. Data derived from 9,959 Brazilian workers, obtained from four cross-sectional studies that used similar methodology, among groups of informal workers, teachers, healthcare workers, and urban workers. Common mental disorders were measured by using SRQ-20. Latent class analysis was performed on each database separately. Results. Three classes of symptoms were confirmed in the occupational categories investigated. In all studies, class I met better criteria for suspicion of common mental disorders. Class II discriminated workers with intermediate probability of answers to the items belonging to anxiety, sadness, and energy decrease that configure common mental disorders. Class III was composed of subgroups of workers with low probability to respond positively to questions for screening common mental disorders. Conclusions. Three patterns of symptoms of common mental disorders were identified in the occupational groups investigated, ranging from distinctive features to low probabilities of occurrence. The SRQ-20 measurements showed stability in capturing nonpsychotic symptoms.

  4. Transforming a large-class lecture course to a smaller-group interactive course.

    Science.gov (United States)

    Persky, Adam M; Pollack, Gary M

    2010-11-10

    To transition a large pharmacokinetics course that was delivered using a traditional lecture format into a smaller-group course with a discussion format. An e-book and Web-based multimedia learning modules were utilized to facilitate students' independent learning which allowed the number of classes they were required to attend to be reduced from 3 to 1 per week. Students were assigned randomly to 1 of 3 weekly class sessions. The majority of lecture time was replaced with active-learning activities including discussion, problem solving, and case studies to encourage higher-order learning. Changes in course delivery were assessed over a 4-year period by comparing students' grades and satisfaction ratings on course evaluations. Although student satisfaction with the course did not improve significantly, students preferred the smaller-group setting to a large lecture-based class. The resources and activities designed to shift responsibility for learning to the students did not affect examination grades even though a larger portion of examination questions focused on higher orders of learning (eg, application) in the smaller-group format. Transitioning to a smaller-group discussion format is possible in a pharmacokinetics course by increasing student accountability for acquiring factual content outside of the classroom. Students favored the smaller-class format over a large lecture-based class.

  5. The geometry of right angled Artin subgroups of mapping class groups

    CERN Document Server

    Clay, Matt; Mangahas, Johanna

    2010-01-01

    We describe sufficient conditions which guarantee that a finite set of mapping classes generate a right-angled Artin group quasi-isometrically embedded in the mapping class group. Moreover, under these conditions, the orbit map to Teichmuller space is a quasi-isometric embedding for both of the standard metrics. As a consequence, we produce infinitely many genus h surfaces (for any h at least 2) in the moduli space of genus g surfaces (for any g at least 3) for which the universal covers are quasi-isometrically embedded in the Teichmuller space.

  6. The use of computer simulations in whole-class versus small-group settings

    Science.gov (United States)

    Smetana, Lara Kathleen

    This study explored the use of computer simulations in a whole-class as compared to small-group setting. Specific consideration was given to the nature and impact of classroom conversations and interactions when computer simulations were incorporated into a high school chemistry course. This investigation fills a need for qualitative research that focuses on the social dimensions of actual classrooms. Participants included a novice chemistry teacher experienced in the use of educational technologies and two honors chemistry classes. The study was conducted in a rural school in the south-Atlantic United States at the end of the fall 2007 semester. The study took place during one instructional unit on atomic structure. Data collection allowed for triangulation of evidence from a variety of sources approximately 24 hours of video- and audio-taped classroom observations, supplemented with the researcher's field notes and analytic journal; miscellaneous classroom artifacts such as class notes, worksheets, and assignments; open-ended pre- and post-assessments; student exit interviews; teacher entrance, exit and informal interviews. Four web-based simulations were used, three of which were from the ExploreLearning collection. Assessments were analyzed using descriptive statistics and classroom observations, artifacts and interviews were analyzed using Erickson's (1986) guidelines for analytic induction. Conversational analysis was guided by methods outlined by Erickson (1982). Findings indicated (a) the teacher effectively incorporated simulations in both settings (b) students in both groups significantly improved their understanding of the chemistry concepts (c) there was no statistically significant difference between groups' achievement (d) there was more frequent exploratory talk in the whole-class group (e) there were more frequent and meaningful teacher-student interactions in the whole-class group (f) additional learning experiences not measured on the assessment

  7. Incivility among Group Mates in English Classes at a Japanese Women's University

    Science.gov (United States)

    Jacobs, George M.; Kimura, Harumi; Greliche, Nicolas

    2016-01-01

    Incivilities are words and actions that may be perceived as impolite. This article reports a study of perceptions of and experiences with incivilities during group activities in English class. Participants were 119 students at a women's university in Japan. They completed the Pair/Groupwork Incivility Scale, a Japanese-language instrument, which…

  8. Group Cohesion and Social Support in Exercise Classes: Results from a Danish Intervention Study

    Science.gov (United States)

    Christensen, Ulla; Schmidt, Lone; Budtz-Jorgensen, Esben; Avlund, Kirsten

    2006-01-01

    This study examines the formation of group cohesion and social support in exercise classes among former sedentary adults, participating in a Danish community-based intervention. Furthermore, the aim is to analyze the impact of this process on exercise activity among the participants. A multimethod approach was used, analyzing both survey data and…

  9. Infinite loop space structure(s) on the stable mapping class group

    DEFF Research Database (Denmark)

    Wahl, Nathalie

    2004-01-01

    Tillmann introduced two infinite loop space structures on the plus construction of the classifying space of the stable mapping class group, each with different computational advantages. The first one uses disjoint union on a suitable cobordism category, whereas the second uses an operad which...

  10. A chord diagrammatic presentation of the mapping class group of a once bordered surface

    DEFF Research Database (Denmark)

    Bene, Alex

    2010-01-01

    The Ptolemy groupoid is a combinatorial groupoid generated by elementary moves on marked trivalent fatgraphs with three types of relations. Through the fatgraph decomposition of Teichmüller space, the Ptolemy groupoid is a mapping class group equivariant subgroupoid of the fundamental path groupo...

  11. Research and Teaching: Aligning Assessment to Instruction--Collaborative Group Testing in Large- Enrollment Science Classes

    Science.gov (United States)

    Siegel, Marcelle; Roberts, Tina M.; Freyermuth, Sharyn K.; Witzig, Stephen B.; Izci, Kemal

    2015-01-01

    The authors describe a collaborative group-testing strategy implemented and studied in undergraduate science classes. This project investigated how the assessment strategy relates to student performance and perceptions about collaboration and focused on two sections of an undergraduate biotechnology course taught in separate semesters.

  12. Conceding in Disagreements during Small Group Interactions in Academic Writing Class

    Science.gov (United States)

    Sharma, Bal Krishna

    2012-01-01

    Using conversation analysis as a methodological and analytical framework, this study presents a sequential analysis of disagreement episodes in small group interactions in an advanced academic writing class. Closer scrutiny of the sequences reveals that in order to bring disagreements to a close, participants make use of an array of interactional…

  13. A New Class of Amphiphiles Bearing Rigid Hydrophobic Groups for Solubilization and Stabilization of Membrane Proteins

    DEFF Research Database (Denmark)

    Chae, Pil Seok; Rasmussen, Søren G F; Rana, Rohini R;

    2012-01-01

    Non-traditional amphiphiles: Conferring aqueous solubility on membrane proteins generally requires the use of a detergent or other amphiphilic agent. A new class of amphiphiles was synthesized, based on steroidal lipophilic groups, and evaluated with several membrane proteins. The results show th...

  14. Equidistribution of geodesics on homology classes and analogues for free groups

    DEFF Research Database (Denmark)

    Petridis, Yiannis N.; Risager, Morten S.

    2008-01-01

    We investigate how often geodesics have homology in a fixed set of the homology lattice of a compact Riemann surface. We prove that closed geodesics are equidistributed on any set with asymptotic density with respect to a specific norm. We explain the analogues for free groups, conjugacy classes...

  15. Class-Preserving Coleman Automorphisms of Finite Groups Whose Second Maximal Subgroups Are TI-Subgroups

    Institute of Scientific and Technical Information of China (English)

    Zhengxing LI; Jinke HAI

    2013-01-01

    Recall that a subgroup H of a finite group G is called a TI-subgroup if H ∩ Hg =1or H for each g ∈ G.Suppose that G is a finite group whose second maximal subgroups are TI-subgroups.It is shown that every class-preserving Coleman automorphism of G is an inner automorphism.As an immediate consequence of this result,we obtain that the normalizer property holds for G.

  16. A New Class of Group Field Theories for 1st Order Discrete Quantum Gravity

    OpenAIRE

    Oriti, D; Tlas, T.

    2007-01-01

    Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we construct a new class of Group Field Theory models, for any choice of spacetime dimension and signature, whose Feynman amplitudes are given by path integrals for clearly identified discrete gravity actions, in 1st order variables. In the 3-dimensional case, the corresponding discrete action is that of 1st order Regg...

  17. Perceptions of the activity, the social climate, and the self during group exercise classes regulate intrinsic satisfaction.

    Science.gov (United States)

    Maher, Jaclyn P; Gottschall, Jinger S; Conroy, David E

    2015-01-01

    Engaging in regular physical activity is a challenging task for many adults. Intrinsic satisfaction with exercise classes is thought to promote adherence to physical activity. This study examined the characteristics of exercise classes that impact within-person changes in intrinsic satisfaction over the course of an extended group exercise program. A 30-week physical activity trial was conducted with assessments at the end of each class. Community-living adults (n = 29) were instructed to complete at least six group exercise classes each week and, following each exercise class, complete a questionnaire asking about the characteristics of the class and the participant's evaluation of the class. Intrinsic satisfaction was high, on average, but varied as much within-person from class-to-class as it did between exercisers. Participants reported the greatest intrinsic satisfaction when classes placed greater emphasis on exercisers' involvement with the group task, feelings of competence, and encouragement from the instructor. For the most part, exercise classes that were more intense than usual were perceived by exercisers as less intrinsically satisfying. Some overall characteristics of the exercise classes were also associated with intrinsic satisfaction. The social and motivational characteristics of group exercise classes contribute to exercisers' intrinsic satisfaction with classes and attention to those dynamics, as well as the intensity of the exercise, may improve adherence for exercise regimens.

  18. A new class of group field theories for first order discrete quantum gravity

    Energy Technology Data Exchange (ETDEWEB)

    Oriti, D [Institute for Theoretical Physics and Spinoza Institute, Utrecht University, Leuvenlaan 4, Utrecht 3584 TD (Netherlands); Tlas, T [Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)], E-mail: d.oriti@phys.uu.nl, E-mail: t.tlas@damtp.cam.ac.uk

    2008-04-21

    Group field theories, a generalization of matrix models for 2D gravity, represent a second quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we construct a new class of group field theory models, for any choice of spacetime dimension and signature, whose Feynman amplitudes are given by path integrals for clearly identified discrete gravity actions, in first order variables. In the three-dimensional case, the corresponding discrete action is that of first order Regge calculus for gravity (generalized to include higher order corrections), while in higher dimensions, they correspond to a discrete BF theory (again, generalized to higher order) with an imposed orientation restriction on hinge volumes, similar to that characterizing discrete gravity. This new class of group field theories may represent a concrete unifying framework for loop quantum gravity and simplicial quantum gravity approaches.

  19. A New Class of Group Field Theories for 1st Order Discrete Quantum Gravity

    CERN Document Server

    Oriti, Daniele

    2007-01-01

    Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity. In this paper, we construct a new class of Group Field Theory models, for any choice of spacetime dimension and signature, whose Feynman amplitudes are given by path integrals for clearly identified discrete gravity actions, in 1st order variables. In the 3-dimensional case, the corresponding discrete action is that of 1st order Regge calculus for gravity (generalized to include higher order corrections), while in higher dimensions, they correspond to a discrete BF-theory (again, generalized to higher order) with an imposed orientation restriction on hinge volumes, similar to that characterizing discrete gravity. The new models shed also light on the large distance or semi-classical approximation of spin foam models. This new class of group field theories may represent a concrete unifying framework for loop quantum gravity and simplicial quantum grav...

  20. Conjugacy classes in Sylow p-subgroups of finite Chevalley groups in bad characteristic

    CERN Document Server

    Bradley, John D

    2012-01-01

    Let $U = \\mathbf U(q)$ be a Sylow $p$-subgroup of a finite Chevalley group $G = \\mathbf G(q)$. In [GR}] R\\"ohrle and the second author determined a parameterization of the conjugacy classes of $U$, for $\\mathbf G$ of small rank when $q$ is a power of a good prime for $\\mathbf G$. As a consequence they verified that the number $k(U)$ of conjugacy classes of $U$ is given by a polynomial in $q$ with integer coefficients. In the present paper, we consider the case when $p$ is a bad prime for $\\mathbf G$. We obtain a parameterization of the conjugacy classes of $U$, when $\\mathbf G$ has rank less than or equal to 4, and $\\mathbf G$ is not of type $F_4$. In these cases we deduce that $k(U)$ is given by a polynomial in $q$ with integer coefficients; this polynomial is different from the polynomial for good primes.

  1. On reducibility of mapping class group representations: the SU(N) case

    DEFF Research Database (Denmark)

    Andersen, Jørgen Ellegaard; Fjelstad, Jens

    2010-01-01

    A such that the torus partition function Z(A) of the corresponding conformal field theory is non-trivial, implying reducibility of the genus 1 representation of the modular group, then the representation of the genus g mapping class group constructed from C is reducible for every g\\geq 1. We also extend the number...... rational conformal field theories, making use of Frobenius algebras and their representations in modular categories. Given a modular category C, a rational conformal field theory can be constructed from a Frobenius algebra A in C. We show that if C contains a symmetric special Frobenius algebra...

  2. Stable cohomology of the universal Picard varieties and the extended mapping class group

    DEFF Research Database (Denmark)

    Ebert, Johannes; Randal-Williams, Oscar

    2012-01-01

    We study the moduli spaces which classify smooth surfaces along with a complex line bundle. There are homological stability and Madsen--Weiss type results for these spaces (mostly due to Cohen and Madsen), and we discuss the cohomological calculations which may be deduced from them. We then relate...... these spaces to (a generalisation of) Kawazumi's extended mapping class groups, and hence deduce cohomological information about these. Finally, we relate these results to complex algebraic geometry. We construct a holomorphic stack classifying families of Riemann surfaces equipped with a fibrewise holomorphic...... line bundle, which is a gerbe over the universal Picard variety, and compute its holomorphic Picard group....

  3. Group cohesion and social support in exercise classes: results from a danish intervention study

    DEFF Research Database (Denmark)

    Christensen, Ulla; Schmidt, Lone; Budtz-Jørgensen, Esben;

    2006-01-01

    This study examines the formation of group cohesion and social support in exercise classes among former sedentary adults, participating in a Danish community-based intervention. Furthermore, the aim is to analyze the impact of this process on exercise activity among the participants. A multimethod...... approach was used, analyzing both survey data and 18 personal interviews collected among 87 participants who completed the intervention project. Analysis was performed according to the grounded theory method. The formation of group cohesion was conditioned by the social composition of the group......, the teaching ability by the instructors, and the activity by itself. The cohesive group was characterized by an attitude of mutual support toward exercise activities. This mutual support facilitated development of self-efficacy beliefs among the participants improving their mastery expectation regarding...

  4. 8-Ranks of Class Groups of Quadratic Number Fields and Their Densities

    Institute of Scientific and Technical Information of China (English)

    Qin YUE

    2011-01-01

    For F=Q(√εpq1/2),ε∈{±1,±2},primes-p≡q≡1 mod 4,we give the necessary and sufficient conditions for 8-ranks of narrow class groups of F equal to 1 or 2 such that we can calculate their densities.All results are stated in terms of congruence relations of p,q modulo 2n,the quartic residue smbol(p/q)4 and binary quadratic forms such as qh(-2p)/4=x2+2py2,where h(-2p)is the class number of Q(√-2p1/2).The results are very useful for numerical computations.

  5. Semi-longitudinal Study of the Mcnamara Cephalometric Triangle in Class II and Class III Subjects Grouped by Cervical Vertebrae Maturation Stage.

    Science.gov (United States)

    Arriola-Guillén, Luis E; Fitzcarrald, Fernando D; Flores-Mir, Carlos

    2015-12-01

    The aim was to compare the McNamara cephalometric triangle values in untreated normodivergent Class II and Class III malocclusion subjects of Latin American origin grouped by cervical vertebrae maturation stage to an untreated Class I malocclusion normodivergent control group. The study was conducted on a sample of 610 pretreatment lateral cephalograms (250 male, 360 female), examined and grouped according to their anteroposterior skeletal relationship (Class I, II or III), cervical vertebrae maturation stage (Pre Pubertal Peak P1 = CS1 and CS2, Pubertal Peak P2= CS3 and CS4, and Post Pubertal Peak P3 = CS5 and CS6) and sex. Co-A, Co-Gn and ENA-Me were measured in each lateral cephalogram. ANOVA and Tukey HSD post-hoc tests were performed to determine differences between the groups. The results showed that in males, the greatest maxillary and mandibular dimensional increases occurred during the P3 stage (CS5 to CS6), while in females, they occurred in the P2 stage (CS3 to CS4). The Co-A and Co-Gn showed significant differences between the malocclusion classes (pClass II subjects and the mandibular lengths in Class III subjects were already higher at the beginning of the period evaluated (P1). A worsening trend for the Class II and III malocclusions was identified during the period evaluated. Finally, changes in the McNamara cephalometric triangle values were markedly different in the three normodivergent skeletal malocclusion classes. In these Latin American subjects the pubertal growth spurt occurred at different times with respect to the Caucasian and Asian norms.

  6. The effects of training group exercise class instructors to adopt a motivationally adaptive communication style.

    Science.gov (United States)

    Ntoumanis, N; Thøgersen-Ntoumani, C; Quested, E; Hancox, J

    2016-06-10

    Drawing from self-determination theory (Deci & Ryan, 2002), we developed and tested an intervention to train fitness instructors to adopt a motivationally adaptive communication style when interacting with exercisers. This was a parallel group, two-arm quasi-experimental design. Participants in the intervention arm were 29 indoor cycling instructors (n = 10 for the control arm) and 246 class members (n = 75 for the control arm). The intervention consisted of face-to-face workshops, education/information video clips, group discussions and activities, brainstorming, individual planning, and practical tasks in the cycling studio. Instructors and exercisers responded to validated questionnaires about instructors' use of motivational strategies and other motivation-related variables before the first workshop and at the end of the third and final workshop (4 months later). Time × arm interactions revealed no significant effects, possibly due to the large attrition of instructors and exercisers in the control arm. Within-group analyses in the intervention arm showed that exercisers' perceptions of instructor motivationally adaptive strategies, psychological need satisfaction, and intentions to remain in the class increased over time. Similarly, instructors in the intervention arm reported being less controlling and experiencing more need satisfaction over time. These results offer initial promising evidence for the positive impact of the training.

  7. Sarcoidosis HLA class II genotyping distinguishes differences of clinical phenotype across ethnic groups

    Science.gov (United States)

    Sato, Hiroe; Woodhead, Felix A.; Ahmad, Tariq; Grutters, Jan C.; Spagnolo, Paolo; van den Bosch, Jules M.M.; Maier, Lisa A.; Newman, Lee S.; Nagai, Sonoko; Izumi, Takateru; Wells, Athol U.; du Bois, Roland M.; Welsh, Kenneth I.

    2010-01-01

    The HLA class II (DRB1 and DQB1) associations with sarcoidosis have been studied by several groups but often without consistent results. In this paper, we consider the hypothesis that observed inconsistencies relate to distinct, genetically encoded disease phenotypes which differ in prevalence between centres. We therefore typed HLA-DRB1 and DQB1 in 340 UK, 139 Dutch and 163 Japanese sarcoidosis patients and, respectively, 354, 218 and 168 healthy controls from these populations. We applied consistent phenotyping and genotyping and investigated associations between HLA class II alleles and distinct disease phenotypes within and between ethnic groups. DRB1*01 and DQB1*0501 are protective against all manifestations of sarcoidosis. Lung-predominant sarcoidosis is associated with DRB1*12 and *14. Löfgren's syndrome is a common sarcoidosis phenotype in the Dutch and is strongly associated with the DRB1*0301 allele. This phenotype is not seen among the Japanese in whom DRB1*0301 is absent. The same allele is protective for UK uveitis. Sarcoid uveitis is common in Japan. The DRB1*04–DQB1*0301 haplotype is a risk factor for this disease manifestation in Japanese and UK subjects but protective for sarcoidosis overall. We show that distinct sarcoidosis phenotypes have similar genetic associations across ethnic groups. The disease case mix differs between centres and may be explained by different ethnic allelic frequencies. PMID:20685690

  8. Analysis of KIR gene frequencies and HLA class I genotypes in prostate cancer and control group.

    Science.gov (United States)

    Portela, P; Jobim, L F; Salim, P H; Koff, W J; Wilson, T J; Jobim, M R; Schwartsmann, G; Roesler, R; Jobim, M

    2012-10-01

    Prostate cancer is the second most common cancer in men, with a significant increase in incidence and mortality in men over 50 years of age. Natural killer cells (NK) are part of the innate immune system recognizing class I HLA molecules on target cells through their membrane receptors, called killer cell immunoglobulin-like receptors (KIR). The aim of our study is to evaluate the association between the KIR genes and HLA alleles in patients with prostate cancer and healthy controls. Two hundred patients with prostate cancer and 185 healthy controls were typed for HLA class I and KIR genes by PCR-SSP. When both groups were compared, no significant differences were found for HLA-C group 1 and group 2, HLA-Bw4, HLA-A3 and A11. No difference was seen either in KIR frequency between patients with prostate cancer and controls. In conclusion, our data suggest no potential role for the KIR gene system in prostate cancer.

  9. Lie group analysis method for two classes of fractional partial differential equations

    Science.gov (United States)

    Chen, Cheng; Jiang, Yao-Lin

    2015-09-01

    In this paper we deal with two classes of fractional partial differential equation: n order linear fractional partial differential equation and nonlinear fractional reaction diffusion convection equation, by using the Lie group analysis method. The infinitesimal generators general formula of n order linear fractional partial differential equation is obtained. For nonlinear fractional reaction diffusion convection equation, the properties of their infinitesimal generators are considered. The four special cases are exhaustively investigated respectively. At the same time some examples of the corresponding case are also given. So it is very convenient to solve the infinitesimal generator of some fractional partial differential equation.

  10. Reduction theory for mapping class groups and applications to moduli spaces

    CERN Document Server

    Leuziger, Enrico

    2008-01-01

    Let $S=S_{g,p}$ be a compact, orientable surface of genus $g$ with $p$ punctures and such that $d(S):=3g-3+p>0$. The mapping class group $\\textup{Mod}_S$ acts properly discontinuously on the Teichm\\"uller space $\\mathcal T(S)$ of marked hyperbolic structures on $S$. The resulting quotient $\\mathcal M(S)$ is the moduli space of isometry classes of hyperbolic surfaces. We provide a version of precise reduction theory for finite index subgroups of $\\textup{Mod}_S$, i.e., a description of exact fundamental domains. As an application we show that the asymptotic cone of the moduli space $\\mathcal M(S)$ endowed with the Teichm\\"uller metric is bi-Lipschitz equivalent to the Euclidean cone over the finite simplicial (orbi-) complex $ \\textup{Mod}_S\\backslash\\mathcal C(S)$, where $\\mathcal C(S)$ of $S$ is the complex of curves of $S$. We also show that if $d(S)\\geq 2$, then $\\mathcal M(S)$ does \\emph{not} admit a finite volume Riemannian metric of (uniformly bounded) positive scalar curvature in the bi-Lipschitz class...

  11. Acoustic environment challenges for the unique communication conditions in group learning classes in elementary school classrooms

    Science.gov (United States)

    Sutherland, Louis; Lubman, David; Pearsons, Karl

    2005-04-01

    Unlike the traditional ``sage-on-the-stage'' configuration of many K-12 classrooms, the group learning or ``guide-on-the-side'' configuration does not involve communication between a teacher in front of a seated class of 20 to 30 students. Instead, it can involve, most of the time, communication between the teacher and each of several small groups of students interacting, aurally, with each other. To maintain the desired 15 dB signal-to-noise ratio intended as the rationale for the ANSI standard, S12.60-2002 on classroom acoustics, the ``noise'' heard by participants in one of the groups is likely to include the speech levels generated by the participants in the other groups as well as the background noise in the unoccupied classroom. Thus, specification of the speech level within (i.e. the ``signal''), and between (i.e. part of the ``noise'') the learning groups, must be considered. Data available to evaluate these speech levels are reviewed and possible models considered to account for the Lombard effect for voice levels of both the teacher and the students. Some of the gaps in these data are suggested as a challenge to stimulate further studies on speech levels of teachers and students in a wide range of communication conditions.

  12. The Differences between Novice and Expert Group-Piano Teaching Strategies: A Case Study and Comparison of Beginning Group Piano Classes

    Science.gov (United States)

    Pike, Pamela D.

    2014-01-01

    This case study compares the teaching strategies employed by a novice and an expert instructor of two beginning children's group-piano classes. In the United States, there is a century-long tradition of teaching piano to children in groups, and group teaching is championed in pedagogy texts and at professional educator conferences throughout…

  13. The Differences between Novice and Expert Group-Piano Teaching Strategies: A Case Study and Comparison of Beginning Group Piano Classes

    Science.gov (United States)

    Pike, Pamela D.

    2014-01-01

    This case study compares the teaching strategies employed by a novice and an expert instructor of two beginning children's group-piano classes. In the United States, there is a century-long tradition of teaching piano to children in groups, and group teaching is championed in pedagogy texts and at professional educator conferences throughout…

  14. Perceptions of the activity, the social climate, and the self during group exercise classes regulate intrinsic satisfaction

    OpenAIRE

    Maher, Jaclyn P.; Gottschall, Jinger S.; Conroy, David E.

    2015-01-01

    Engaging in regular physical activity is a challenging task for many adults. Intrinsic satisfaction with exercise classes is thought to promote adherence to physical activity. This study examined the characteristics of exercise classes that impact within-person changes in intrinsic satisfaction over the course of an extended group exercise program. A 30-week physical activity trial was conducted with assessments at the end of each class. Community-living adults (n = 29) were instructed to com...

  15. A Case Study of Markdale High School's Implementation of Heterogeneously-Grouped Classes in English, Mathematics, Science, and Social Studies

    Science.gov (United States)

    Pierre-Louis, Fred

    2010-01-01

    The purpose of this study was to describe Markdale High School's change from separate college preparatory and general level classes to heterogeneously-grouped classes in English, mathematics, science, and social studies, with particular emphasis on the principal's leadership style, change process, and teacher concerns (Hall & Hord, 2006)…

  16. 8-ranks of Class Groups of Some Imaginary Quadratic Number Fields

    Institute of Scientific and Technical Information of China (English)

    Xi Mei; WU Qin YUE

    2007-01-01

    Let F = Q(√-p1p2) be an imaginary quadratic field with distinct primes p1 ≡ p2≡ 1 mod 8 and the Legendre symbol (p1/p2) = 1. Then the 8-rank of the class group of F is equal to 2 if and only if the following conditions hold: (1) The quartic residue symbols (p1/p2)4 = (p2/p1)4 = 1; (2) Either both p1 and p2 are represented by the form a2 + 32b2 over Z and ph2+(2p1)/4 = x2 - 2p1y2, x,y ∈ Z, or both pi and p2 are not represented by the form a2 + 32b2 over Z and ph2+(2p1)/4 = ε(2x2 - p1y2), x,y ∈ Z,ε∈{±1}, where h+(2p1) is the narrow class number of Q(2√2p1). Moreover, we also generalize these results.

  17. Analysis of KIR gene frequencies and HLA class I genotypes in breast cancer and control group.

    Science.gov (United States)

    Jobim, Maria Regina; Jobim, Mariana; Salim, Patrícia H; Portela, Pâmela; Jobim, Luiz Fernando; Leistner-Segal, Sandra; Bittelbrunn, Ana Cristina; Menke, Carlos Henrique; Biazús, Jorge Villanova; Roesler, Rafael; Schwartsmann, Gilberto

    2013-09-01

    Breast cancer is the main cause of cancer-related death among women, with a 0.5% increase in incidence per year. Natural killer cells (NK) are part of the innate immune system recognizing class I HLA molecules on target cells through their membrane receptors, called killer cell immunoglobulin-like receptors (KIR). The aim of our study was to evaluate the association between the KIR genes and HLA alleles in patients with breast cancer and healthy controls. Two hundred thirty patients with breast cancer and 272 healthy controls were typed for HLA class I and KIR genes by PCR-SSO. When both groups were compared, the presence of inhibitory KIR2DL2 receptors was significantly higher in breast cancer patients than in healthy controls. No significant differences were found for HLA-C2 and HLA-Bw4. However, a higher frequency of HLA-C1 in breast cancer patients was observed. These findings suggest a potential role for the KIR gene system in breast cancer. Further studies to confirm this observation are warranted.

  18. Entanglement entropy and boundary renormalization group flow: Exact results in the Ising universality class

    Science.gov (United States)

    Cornfeld, Eyal; Sela, Eran

    2017-08-01

    The entanglement entropy in one-dimensional critical systems with boundaries has been associated with the noninteger ground-state degeneracy. This quantity, being a characteristic of boundary fixed points, decreases under renormalization group flow, as predicted by the g theorem. Here, using conformal field theory methods, we exactly calculate the entanglement entropy in the boundary Ising universality class. Our expression can be separated into the well-known bulk term and a boundary entanglement term, displaying a universal flow between two boundary conditions, in accordance with the g theorem. These results are obtained within the replica trick approach, where we show that the associated twist field, a central object generating the geometry of an n -sheeted Riemann surface, can be bosonized, giving simple analytic access to multiple quantities of interest. We argue that our result applies to other models falling into the same universality class. This includes the vicinity of the quantum critical point of the two-channel Kondo model, allowing one to track in real space the presence of a region containing one-half of a qubit with entropy 1/2 log(2 ) , associated with a free local Majorana fermion.

  19. Relativistic Chasles' theorem and the conjugacy classes of the inhomogeneous Lorentz group

    CERN Document Server

    Minguzzi, E

    2013-01-01

    This work is devoted to the relativistic generalization of Chasles' theorem, namely to the proof that every proper orthochronous isometry of Minkowski spacetime, which sends some point to its chronological future, is generated through the frame displacement of an observer which moves with constant acceleration and constant angular velocity. The acceleration and angular velocity can be chosen either aligned or perpendicular, and in the latter case the angular velocity can be chosen equal or smaller than than the acceleration. We start reviewing the classical Euler's and Chasles' theorems both in the Lie algebra and group versions. We recall the relativistic generalization of Euler's theorem and observe that every (infinitesimal) transformation can be recovered from information of algebraic and geometric type, the former being identified with the conjugacy class and the latter with some additional geometric ingredients (the screw axis in the usual non-relativistic version). Then the proper orthochronous inhomog...

  20. CLASS B 1359 + 154: Modelling Lensing by a Group of Galaxies

    Indian Academy of Sciences (India)

    Sunita Nair

    2002-03-01

    The recently discovered gravitationally lensed system CLASS B1359+154 appears to have six detectable images of a single background source at a redshift of 3.235. A group of galaxies acts as the lens, at a redshift of ∼ 1. The present work identifies two distinct, physically plausible image configurations, a 7-image one and a 9-image one. Mass models are constructed corresponding to realizations of these two configurations. Both models call for, in addition to non-singular galaxy-type lenses, a larger scale mass component that resembles the extended dark matter distributions seen in relatively low-redshift galaxy groups. It is presently observationally impossible to study the extended X-ray emission from a group at such a high redshift, hence lensing studies are of some interest. A lensed system with a high image multiplicity does not necessarily admit of a unique lensing interpretation; discrimination is possible with additional observable details (e.g., the image parities, which are uncommon among even the simpler systems).

  1. Group composition and network structure in school classes : a multilevel application of the p* model

    NARCIS (Netherlands)

    Lubbers, MJ

    2003-01-01

    This paper describes the structure of social networks of students within school classes and examines differences in network structure between classes. In order to examine the network structure within school classes, we focused in particular on the principle of homophily, i.e. the tendency that peopl

  2. In-Class Reflective Group Discussion as a Strategy for the Development of Students as Evolving Professionals

    Science.gov (United States)

    Tsang, Annetta Kit Lam

    2011-01-01

    The primary aim of this study was to determine perceptions of three cohorts of third year undergraduate students (n = 65) on in-class reflective group discussion as a critical reflective approach for evolving professionals. Reflective group discussions were embedded into a final year course within the University of Queensland Bachelor of Oral…

  3. Boys and girls smoking within the Danish elementary school classes: a group-level analysis

    DEFF Research Database (Denmark)

    Rasmussen, Mette; Damsgaard, Mogens T; Due, Pernille

    2002-01-01

    ,515 students) from a random sample of schools in Denmark took part. The proportion of male and female "at all" smokers and daily smokers in the school class was calculated. RESULTS: The mean "at all" smoking proportion in the school classes is 39% for girls and 32% for boys. The proportion of male and female...... smokers within school classes does not correlate. There is high variation in male and female smoking behaviour between school classes. CONCLUSIONS: The influence of social classroom environment on the processes causing smoking behaviour may be different for boys and girls. This paper illustrates...

  4. On the class of possible nonlocal anyon-like operators and quantum groups

    CERN Document Server

    Chaichian, Masud; Montonen, Claus

    1993-01-01

    We find a class of nonlocal operators constructed by attaching a disorder operator to fermionic degrees of freedom, which can be used to generate q-deformed algebras following the Schwinger approach. This class includes the recently proposed anyonic operators defined on a lattice.

  5. Three classes of plasmid (47-63 kb) carry the type B neurotoxin gene cluster of group II Clostridium botulinum.

    Science.gov (United States)

    Carter, Andrew T; Austin, John W; Weedmark, Kelly A; Corbett, Cindi; Peck, Michael W

    2014-08-01

    Pulsed-field gel electrophoresis and DNA sequence analysis of 26 strains of Group II (nonproteolytic) Clostridium botulinum type B4 showed that 23 strains carried their neurotoxin gene cluster on a 47-63 kb plasmid (three strains lacked any hybridization signal for the neurotoxin gene, presumably having lost their plasmid). Unexpectedly, no neurotoxin genes were found on the chromosome. This apparent constraint on neurotoxin gene transfer to the chromosome stands in marked contrast to Group I C. botulinum, in which neurotoxin gene clusters are routinely found in both locations. The three main classes of type B4 plasmid identified in this study shared different regions of homology, but were unrelated to any Group I or Group III plasmid. An important evolutionary aspect firmly links plasmid class to geographical origin, with one class apparently dominant in marine environments, whereas a second class is dominant in European terrestrial environments. A third class of plasmid is a hybrid between the other two other classes, providing evidence for contact between these seemingly geographically separated populations. Mobility via conjugation has been previously demonstrated for the type B4 plasmid of strain Eklund 17B, and similar genes associated with conjugation are present in all type B4 plasmids now described. A plasmid toxin-antitoxin system pemI gene located close to the neurotoxin gene cluster and conserved in each type B4 plasmid class may be important in understanding the mechanism which regulates this unique and unexpected bias toward plasmid-borne neurotoxin genes in Group II C. botulinum type B4.

  6. Is Group Singing Special? Health, Well-Being and Social Bonds in Community-Based Adult Education Classes Group singing, well-being and social bonds

    OpenAIRE

    Pearce, E; Launay, J.; A. Machin; Dunbar, RIM

    2016-01-01

    Evidence demonstrates that group singing improves health and well-being, but the precise mechanisms remain unknown. Given that cohesive social networks also positively influence health, we focus on the social aspects of singing, exploring whether improvements in health and well-being are mediated by stronger social bonds, both to the group as a whole (collective-bonding) and to individual classmates (relational-bonding). To do so, seven newly-formed community-based adult education classes (fo...

  7. On Finite Groups whose Every Proper Normal Subgroup is a Union of a Given Number of Conjugacy Classes

    Indian Academy of Sciences (India)

    Ali Reza Ashrafi; Geetha Venkataraman

    2004-08-01

    Let be a finite group and be a normal subgroup of . We denote by $ncc(A)$ the number of -conjugacy classes of and is called -decomposable, if $ncc(A)=n$. Set $\\mathcal{K}_G=\\{ncc(A)|A\\vartriangleleft G\\}$. Let be a non-empty subset of positive integers. A group is called -decomposable, if $\\mathcal{K}_G=X$. Ashrafi and his co-authors [1–5] have characterized the -decomposable non-perfect finite groups for $X=\\{1,n\\}$ and ≤ 10. In this paper, we continue this problem and investigate the structure of -decomposable non-perfect finite groups, for $X=\\{1, 2, 3\\}$. We prove that such a group is isomorphic to $Z_6, D_8, Q_8, S_4$, Small Group (20,3), Small Group (24,3), where Small Group (, ) denotes the $m^{\\mathrm{th}}$ group of order in the small group library of GAP [11].

  8. New techniques for computing the ideal class group and a system of fundamental units in number fields

    CERN Document Server

    Biasse, Jean-François

    2012-01-01

    We describe a new algorithm for computing the ideal class group, the regulator and a system of fundamental units in number fields under the generalized Riemann hypothesis. We use sieving techniques adapted from the number field sieve algorithm to derive relations between elements of the ideal class group, and $p$-adic approximations to manage the loss of precision during the computation of units. This new algorithm is particularily efficient for number fields of small degree for which a speed-up of an order of magnitude is achieved with respect to the standard methods.

  9. Transforming a Large-Class Lecture Course to a Smaller-Group Interactive Course

    National Research Council Canada - National Science Library

    Adam M Persky; Gary M Pollack

    2010-01-01

    .... Students were assigned randomly to 1 of 3 weekly class sessions. The majority of lecture time was replaced with active-learning activities including discussion, problem solving, and case studies to encourage higher-order learning...

  10. Transforming a large-class lecture course to a smaller-group interactive course

    National Research Council Canada - National Science Library

    Persky, Adam M; Pollack, Gary M

    2010-01-01

    .... Students were assigned randomly to 1 of 3 weekly class sessions. The majority of lecture time was replaced with active-learning activities including discussion, problem solving, and case studies to encourage higher-order learning...

  11. Spatial-Temporal NDVI Variation of Different Alpine Grassland Classes and Groups in Northern Tibet from 2000 to 2013

    Directory of Open Access Journals (Sweden)

    Xiaoke Zhang

    2015-08-01

    Full Text Available The Normalized Difference Vegetation Index (NDVI can usually be used as a good proxy for evaluating potential variability in regional ecosystems and under climate change. We used 16-day MODIS-NDVI composite satellite data with 250-m resolution for the period 2000 to 2013 to assess the temporal and spatial variation of the NDVI among different alpine grassland classes and groups in northern Tibet. The annual average NDVI of the whole alpine grassland area in northern Tibet generally increased slightly from 2000 to 2003, and the annual average NDVI values ranged from 0.112 to 0.492 across all alpine grassland groups and years. The NDVI clearly decreased from the southeastern to the northwestern areas, with 22.50% of total grasslands significantly having increased or decreased, while 77.50% presented little change during 2000–2013. Both temperature and precipitation were key factors that controlled the NDVI variations of the entire alpine grassland. However, for different alpine grassland classes and groups, the NDVI displayed different correlation patterns with temperature and precipitation. Our results demonstrate that the NDVI variations of alpine grassland generally increased slightly but differed among different classes and groups. Although temperature and precipitation were the driving forces influencing the NDVI of the entire alpine grassland, it was more difficult to define the driving forces for the individual classes and groups, and more detailed analyses covering prolonged observation periods are still needed.

  12. A Group Contingency plus Self-Management Intervention Targeting At-Risk Secondary Students' Class-Work and Active Engagement

    Science.gov (United States)

    Trevino-Maack, Sylvia I.; Kamps, Debra; Wills, Howard

    2015-01-01

    The purpose of the present study is to show that an independent group contingency (GC) combined with self-management strategies and randomized-reinforcer components can increase the amount of written work and active classroom responding in high school students. Three remedial reading classes and a total of 15 students participated in this study.…

  13. Differential School Effects among Low, Middle, and High Social Class Composition Schools: A Multiple Group, Multilevel Latent Growth Curve Analysis

    Science.gov (United States)

    Palardy, Gregory J.

    2008-01-01

    This study uses large-scale survey data and a multiple group, multilevel latent growth curve model to examine differential school effects between low, middle, and high social class composition public schools. The results show that the effects of school inputs and school practices on learning differ across the 3 subpopulations. Moreover, student…

  14. Aligning Coordination Class Theory with a New Context: Applying a Theory of Individual Learning to Group Learning

    Science.gov (United States)

    Barth-Cohen, Lauren A.; Wittmann, Michael C.

    2017-01-01

    This article presents an empirical analysis of conceptual difficulties encountered and ways students made progress in learning at both individual and group levels in a classroom environment in which the students used an embodied modeling activity to make sense of a specific scientific scenario. The theoretical framework, coordination class theory,…

  15. Differential School Effects among Low, Middle, and High Social Class Composition Schools: A Multiple Group, Multilevel Latent Growth Curve Analysis

    Science.gov (United States)

    Palardy, Gregory J.

    2008-01-01

    This study uses large-scale survey data and a multiple group, multilevel latent growth curve model to examine differential school effects between low, middle, and high social class composition public schools. The results show that the effects of school inputs and school practices on learning differ across the 3 subpopulations. Moreover, student…

  16. Aligning Coordination Class Theory with a New Context: Applying a Theory of Individual Learning to Group Learning

    Science.gov (United States)

    Barth-Cohen, Lauren A.; Wittmann, Michael C.

    2017-01-01

    This article presents an empirical analysis of conceptual difficulties encountered and ways students made progress in learning at both individual and group levels in a classroom environment in which the students used an embodied modeling activity to make sense of a specific scientific scenario. The theoretical framework, coordination class theory,…

  17. Students' Self-Esteem and Their Perception of Teacher Behavior: A Study of Between-Class Ability Grouping

    Science.gov (United States)

    Kususanto, Prihadi; Ismail, Hairul Nizam; Jamil, Hazri

    2010-01-01

    Introduction: Between-class ability grouping practice in Malaysian Secondary Schools was studied in order to find the influence students' perception on their teachers' behavior on their self-esteem. Students' perception on teachers' behaviors were divided into two categories: controlling students' behavior to avoid disciplinary matters and…

  18. Understanding the experiences of a group of Yemeni students in an ESL science class

    Science.gov (United States)

    Fradi, Gihan

    American classrooms are experiencing an influx of diverse language speaking students while for science educators the study of EBL students' learning in science classrooms is a relatively new field (Lee & Buxton, 2010). At the same time there is a growing emphasis on the importance of science practices (NGSS). This poses significant challenges for science educators who are enacting science curriculum that supports all students' learning. Supporting EBL students' academic achievement is significant because literacy is important for students' access to economic and social benefits that come with science literacy (Atwater, 1996). The purpose of this study was to examine the socio-linguistic challenges that a specific group of EBL students (Yemeni) faced and the extent to which such challenges affected their academic performance in science. These challenges are related to linguistic and cultural interactions, which can lead to conflicts between student and school, thereby interfering with the effectiveness of their education. This study also examined these students' and their science teacher's perspectives on strategies that can be used to facilitate their language acquisition during science class and help them become active participants in the school and classroom communities. The study used a qualitative interpretive research methodology and involved four Arab-American EBL students (two males and two females) from Yemen, who had been in the US for different periods of time. The amount of time these students had been in the US was important to examine differences in their acculturation and challenges they faced. Similarly, the use of female and male student participants was important to understand the impact of gender in the lived experiences of these students. The results of the study indicated that all the participants struggled with linguistic, social, and cultural aspects of their life in an American high school. These in turn led to a sense of being different

  19. Using Cooperative Small Groups in Introductory Accounting Classes: A Practical Approach.

    Science.gov (United States)

    Miglietti, Cynthia

    2002-01-01

    Effective use of cooperative learning groups requires the following: attention to group formation, orientation that sets clear expectations and guidelines, activities to develop teamwork skills, peer evaluation, and other assessments that recognize and measure individual effort on group projects. (SK)

  20. Saturated hydraulic conductivity of US soils grouped according textural class and bulk density

    Science.gov (United States)

    Importance of the saturated hydraulic conductivity as soil hydraulic property led to the development of multiple pedotransfer functions for estimating it. One approach to estimating Ksat was using textural classes rather than specific textural fraction contents as pedotransfer inputs. The objective...

  1. Saturated hydraulic conductivity of US soils grouped according to textural class and bulk density

    Science.gov (United States)

    Importance of the saturated hydraulic conductivity as soil hydraulic property led to the development of multiple pedotransfer functions for estimating it. One approach to estimating Ksat was using textural classes rather than specific textural fraction contents as pedotransfer inputs. The objective...

  2. Encourage Learners in the Large Class to Speak English in Group Work

    Science.gov (United States)

    Meng, Fanshao

    2009-01-01

    Large-class English teaching is an inexorable trend in many Chinese universities and colleges, which leads to a strange and serious phenomenon that most students' English is ironically but vividly described as "the dumb English". Therefore, cultivating students' communicative skills and developing their language competence has become a…

  3. Using Facebook Groups to Encourage Science Discussions in a Large-Enrollment Biology Class

    Science.gov (United States)

    Pai, Aditi; McGinnis, Gene; Bryant, Dana; Cole, Megan; Kovacs, Jennifer; Stovall, Kyndra; Lee, Mark

    2017-01-01

    This case study reports the instructional development, impact, and lessons learned regarding the use of Facebook as an educational tool within a large enrollment Biology class at Spelman College (Atlanta, GA). We describe the use of this social networking site to (a) engage students in active scientific discussions, (b) build community within the…

  4. Effects of within-class ability grouping on social interaction, achievement and motivation

    NARCIS (Netherlands)

    Saleh, Mohammad; Lazonder, Ard W.; Jong, de Ton

    2005-01-01

    This study examined how grouping arrangements affect students achievement, social interaction, and motivation. Students of high, average and low ability were randomly assigned to homogeneous or heterogeneous ability groups. All groups attended the same plant biology course. The main results indicate

  5. Group-effort applied research: expanding opportunities for undergraduate research through original, class-based research projects.

    Science.gov (United States)

    Moore, Sean D; Teter, Ken

    2014-01-01

    Undergraduate research clearly enriches the educational development of participating students, but these experiences are limited by the inherent inefficiency of the standard one student-one mentor model for undergraduate research. Group-effort applied research (GEAR) was developed as a strategy to provide substantial numbers of undergraduates with meaningful research experiences. The GEAR curriculum delivers concept-driven lecture material and provides hands-on training in the context of an active research project from the instructor's laboratory. Because GEAR is structured as a class, participating students benefit from intensive, supervised research training that involves a built-in network of peer support and abundant contact with faculty mentors. The class format also ensures a relatively standardized and consistent research experience. Furthermore, meaningful progress toward a research objective can be achieved more readily with GEAR than with the traditional one student-one mentor model of undergraduate research because sporadic mistakes by individuals in the class are overshadowed by the successes of the group as a whole. Three separate GEAR classes involving three distinct research projects have been offered to date. In this article, we provide an overview of the GEAR format and review some of the recurring themes for GEAR instruction. We propose GEAR can serve as a template to expand student opportunities for life science research without sacrificing the quality of the mentored research experience.

  6. On the number of classes of conjugate Hall subgroups in finite simple groups

    CERN Document Server

    Revin, D O

    2009-01-01

    In this paper we find the number of conjugate $\\pi$-Hall subgroups in all finite almost simple groups. We also complete the classification of $\\pi$-Hall subgroups in finite simple groups and correct some mistakes from our previous paper.

  7. Short term memory development : Differences in serial position curves between age groups and latent classes

    NARCIS (Netherlands)

    Koppenol, G.V.; Bouwmeester, S.; Vermunt, J.K.

    2014-01-01

    In studies on the development of cognitive processes, children are often grouped based on their ages before analyzing the data. After the analysis, the differences between age groups are interpreted as developmental differences. We argue that this approach is problematic because the variance in

  8. Student Perceptions about Group Based Problem Solving Process in Online and In-Class Settings

    Directory of Open Access Journals (Sweden)

    Salih Birişçi

    2013-12-01

    Full Text Available The aim of this study, through qualitative measures, was to systematically examine the perspectives and meanings formed by the teachers about teaching and learning. This study took place in the spring semester of the 2010-2011 academic year of Artvin Çoruh University. The sample size was 27. The participants were divided in two groupsGroup 1 with group work taking place in an online test (D1, N=12; Group 2 with group work taking place in a classroom experiment (D2, N=12. After six weeks implementation, semi-structured interviews were conducted in order to determine students’ thoughts on problem solving and group work with success on attitudes towards mathematics. Positive change in students’ attitudes towards mathematics occurred in both the D1 and D2 groups. According to the application, the students stated that they developed increased interest towards mathematics and it turned into enjoyable.Key Words:    Problem solving, group study, online learning, student views

  9. On one class of modules over group rings with finiteness restrictions

    Directory of Open Access Journals (Sweden)

    Olga Dashkova

    2014-12-01

    Full Text Available The author studies the $bf R$$G$-module $A$ such that $bf R$ is an associative ring, a group $G$ has infinite section $p$-rank (or infinite 0-rank, $C_{G}(A=1$, and for every proper subgroup $H$ of infinite section $p$-rank (or infinite 0-rank respectively the quotient module $A/C_{A}(H$ is a finite $bf R$-module. It is proved that if the group $G$ under consideration is locally soluble then $G$ is a soluble group and $A/C_{A}(G$ is a finite $bf R$-module.

  10. A Group Contingency Plus Self-Management Intervention Targeting At-Risk Secondary Students' Class-Work and Active Engagement.

    Science.gov (United States)

    Trevino-Maack, Sylvia I; Kamps, Debra; Wills, Howard

    2015-01-01

    The purpose of the present study is to show that an independent group contingency (GC) combined with self-management strategies and randomized-reinforcer components can increase the amount of written work and active classroom responding in high school students. Three remedial reading classes and a total of 15 students participated in this study. Students used self-management strategies during independent reading time to increase the amount of writing in their reading logs. They used self-monitoring strategies to record whether or not they performed expected behaviors in class. A token economy using points and tickets was included in the GC to provide positive reinforcement for target responses. The results were analyzed through visual inspection of graphs and effect size computations and showed that the intervention increased the total amount of written words in the students' reading logs and overall classroom and individual student academic engagement.

  11. Upper Elementary Boys' Participation during Group Singing Activities in Single-Sex and Coeducational Classes

    Science.gov (United States)

    Bazzy, Zadda M.

    2010-01-01

    As boys in the upper elementary grades become increasingly influenced by peer pressure, many are less likely to participate in singing activities because singing is considered a "feminine" activity. The purpose of this research was to explore if there was an effect on upper elementary boys' level of participation during group singing activities…

  12. Learning through Discussions: Comparing the Benefits of Small-Group and Large-Class Settings

    Science.gov (United States)

    Pollock, Philip H.; Hamann, Kerstin; Wilson, Bruce M.

    2011-01-01

    The literature on teaching and learning heralds the benefits of discussion for student learner outcomes, especially its ability to improve students' critical thinking skills. Yet, few studies compare the effects of different types of face-to-face discussions on learners. Using student surveys, we analyze the benefits of small-group and large-class…

  13. Using Professional Teaching Assistants to Support Large Group Business Communication Classes

    Science.gov (United States)

    Rieber, Lloyd J.

    2004-01-01

    In this article, the author reports on the use of classroom instructors and full-time professional teaching assistants called "course tutors" for teaching business communication to large groups at an undergraduate university. The author explains how to recruit course tutors, what course tutors do in the classroom, and the advantages and…

  14. Conceptual foundations of classes with the disciples of special medical group in secondary schools

    Directory of Open Access Journals (Sweden)

    Vaskov Y.V.

    2014-05-01

    Full Text Available Purpose: study and scientific rationale for new approaches to the organization of educational work with students of special medical group in secondary schools. Material : analyzed 15 scientific sources regarding the approaches of different authors to develop educational programs for students of special medical group. Results : focuses on the outstanding issues in a substantive, logistical and human aspects. Found that the selection of the content of educational material for special medical groups is an empirical question. Selection is carried out by copying the existing curriculum of physical culture for healthy children with an indication of the load reduction and exemption of complex elements. Established a complete absence of evaluation of educational achievements of pupils. Based on modern approaches to teaching students based on biomedical and didactic aspects: Leading defined function of each stage of training, fleshed main goals and objectives of the educational process, substantiated various kinds of sports activity, taking into account the diagnosis of diseases and the needs of students of different ages and gender. Conclusions : the main controversy in the decision of the designated problem. Substantiated leading features of each stage of training in special medical groups. A system of assessment of students' achievements.

  15. Taking Ownership of Learning in a Large Class: Group Projects and a Mini-Conference

    Science.gov (United States)

    Borda, Emily J.; Kriz, George S.; Popejoy, Kate L.; Dickinson, Alison K.; Olson, Amy L.

    2009-01-01

    Helping students take ownership of their learning is often a challenge in a large lecture course. In this article, the authors describe a nature of science-oriented group project in a chemistry course in which students gave presentations in concurrent conference sessions as well as its impact on student learning as evidenced through multiple data…

  16. Taking Ownership of Learning in a Large Class: Group Projects and a Mini-Conference

    Science.gov (United States)

    Borda, Emily J.; Kriz, George S.; Popejoy, Kate L.; Dickinson, Alison K.; Olson, Amy L.

    2009-01-01

    Helping students take ownership of their learning is often a challenge in a large lecture course. In this article, the authors describe a nature of science-oriented group project in a chemistry course in which students gave presentations in concurrent conference sessions as well as its impact on student learning as evidenced through multiple data…

  17. Is group singing special? Health, well-being and social bonds in community-based adult education classes.

    Science.gov (United States)

    Pearce, Eiluned; Launay, Jacques; Machin, Anna; Dunbar, Robin I M

    Evidence demonstrates that group singing improves health and well-being, but the precise mechanisms remain unknown. Given that cohesive social networks also positively influence health, we focus on the social aspects of singing, exploring whether improvements in health and well-being are mediated by stronger social bonds, both to the group as a whole (collective-bonding) and to individual classmates (relational-bonding). To do so, seven newly-formed community-based adult education classes (four singing, N=84, and three comparison classes studying creative writing or crafts, N=51) were followed over seven months. Self-report questionnaire data on mental and physical health, well-being, and social bonding were collected at Months 1, 3 and 7. We demonstrate that physical and mental health and satisfaction with life significantly improved over time in both conditions. Path analysis did not show any indirect effects via social bonding of Condition on health and well-being. However, higher collective-bonding at timepoint 3 significantly predicted increased flourishing, reduced anxiety and improved physical health independently of baseline levels. In contrast, relational-bonding showed no such effects, suggesting that it is feeling part of a group that particularly yields health and well-being benefits. Moreover, these results indicate that singing may not improve health and well-being more than other types of activities. Nonetheless, these findings encourage further work to refine our understanding of the social aspects of community-based adult education classes in promoting health, well-being and community cohesion.

  18. Grouping and classifying electrophysiologically-defined classes of neocortical neurons by single cell, whole-genome expression profiling

    Directory of Open Access Journals (Sweden)

    Tatiana Subkhankulova

    2010-04-01

    Full Text Available The diversity of neuronal cell types and how to classify them are perennial questions in neuroscience. The advent of global gene expression analysis raised the possibility that comprehensive transcription profiling will resolve neuronal cell types into groups that reflect some or all aspects of their phenotype. This approach has been successfully used to compare gene expression between groups of neurons defined by a common property. Here we extend this approach to ask whether single neuron gene expression profiling can prospectively resolve neuronal subtypes into groups, independent of any phenotypic information, and whether those groups reflect meaningful biological properties of those neurons. We applied methods we have developed to compare gene expression among single neural stem cells to study global gene expression in 18 randomly picked neurons from layer II/III of the early postnatal mouse neocortex. Cells were selected by morphology and by firing characteristics and electrical properties, enabling the definition of each cell as either fast- or regular-spiking, corresponding to a class of inhibitory interneurons or excitatory pyramidal cells. Unsupervised clustering of young neurons by global gene expression resolved the cells into two groups and those broadly corresponded with the two groups of fast- and regular-spiking neurons. Clustering of the entire, diverse group of 18 neurons of different developmental stages also successfully grouped neurons in accordance with the electrophysiological phenotypes, but with more cells misassigned among groups. Genes specifically enriched in regular spiking neurons were identified from the young neuron expression dataset. These results provide a proof of principle that single-cell gene expression profiling may be used to group and classify neurons in a manner reflecting their known biological properties and may be used to identify cell-specific transcripts.

  19. Setting the question for inquiry: The effects of whole class vs small group on student achievement in elementary science

    Science.gov (United States)

    Cavagnetto, Andy Roy

    This study was conducted to determine the effects of two different student-centered approaches to setting the question for inquiry. The first approach (whole class) consisted of students setting a single question for inquiry after which students worked in small groups during an investigation phase of the activity with all groups exploring the same question. The second approach (small group) consisted of each group of students setting a question resulting in numerous questions being explored per class. A mixed method quasi-experimental design was utilized. Two grade five teachers from a small rural school district in the Midwestern United States participated, each teaching two sections of science (approximately 25 students per section). Results indicate three major findings. Instructional approach (whole class vs. small group) did not effect student achievement in science or language arts. Observational data indicated the actions and skills teachers utilized to implement the approaches were similar. Specifically, the pedagogical skills of dialogical interaction (which was found to be influenced by teacher level of control of learning and teacher content knowledge) and effective rather than efficient use of time were identified as key factors in teachers' progression toward a student-centered, teacher-managed instructional approach. Unit exams along with qualitative and quantitative teacher observation data indicated that these factors do have an impact on student achievement. Specifically increased dialogical interaction in the forms of greater student voice, and increased cognitive demands placed on students by embedding and emphasizing science argument within the student inquiry corresponded to positive gains in student achievement. Additionally, teacher's perception of student abilities was also found to influence professional growth. Finally, allowing students to set the questions for inquiry and design the experiments impact the classroom environment as teacher

  20. Biochemical identification of the bovine blood group M' antigen as a major histocompatibility complex class I-like molecule

    DEFF Research Database (Denmark)

    Hønberg, L S; Larsen, B; Koch, C;

    1995-01-01

    . To elucidate the structural relationship between BoLA-A16 and blood group antigen M', immunoprecipitation experiments on red and white cell lysates isolated from M'-A16 positive and negative cattle were carried out. These results showed that M(r) 44,000 and M(r) 12000 polypeptides can be precipitated from both......Absorption and elution experiments showed that it was impossible to separate antibodies against blood group factor M' from antibodies against bovine lymphocyte antigen (BoLA) A16 in an antiserum showing haemolytic activity against M' as well as lymphocytotoxic activity against BoLA-A16...... red and white cells isolated from M'-A16 positive animals, whereas no bands were seen in M'-A16 negative animals in precipitations with the same antibody. Precipitation with a crossreacting human beta 2-microglobulin (beta 2-m) specific antibody confirmed a class-I-like structure associated with beta...

  1. [Living conditions and life experiences of working-class groups in Rio de Janeiro: rethinking dengue control and popular mobilization].

    Science.gov (United States)

    de Oliveira, R M; Valla, V V

    2001-01-01

    Using narratives of an experience with popular mobilization during the 1986-91 dengue epidemic in the city of Rio de Janeiro, the authors discuss the scientific research and technical counseling involving basic sanitation conditions for vulnerable social groups. They present research results on water distribution in the slums from the Leopoldina area of the city. The research stemmed from demands by community leaders at local forums discussing health conditions. Gathering, systematizing, and analyzing the data were based on what they call "shared knowledge construction", resulting by crossing accumulated scientific knowledge with popular knowledge produced as a result of living conditions and life experiences among working-class groups. Finally, the authors comment on the need for local health professionals to be aware of relationships between epidemic and endemic processes and protection of life.

  2. A model for small-group problem-based learning in a large class facilitated by one instructor.

    Science.gov (United States)

    Nicholl, Tessa A; Lou, Kelvin

    2012-08-10

    To implement and evaluate a model for small-group problem-based learning (PBL) in a large class facilitated by 1 instructor. A PBL model that included weekly assignments, quizzes, peer feedback, and case wrap-up sessions was developed and implemented in the final year of the pharmacy program to allow 1 instructor to facilitate PBL for up to 16 student teams in a large classroom. Student and team scores on multiple-choice examinations confirmed achievement of learning objectives. Students reported on course evaluation surveys that they were able to engage in the learning process and were satisfied with the new PBL model. This model achieved a cost savings of $42,000 per term. A revised PBL model without individual group tutors allowed students to achieve the required learning outcomes in an interactive and engaging atmosphere, avoided classroom-scheduling conflicts, and produced a large cost savings for the university.

  3. Conjugacy Classes of Torsion in 4 × 4 Integral Symplectic Group%四阶整数辛群中扭元的共轭类

    Institute of Scientific and Technical Information of China (English)

    阳庆节

    2008-01-01

    A complete list of representatives of conjugacy classes of torsion in 4 × 4 integral symplectic group is given in this paper.There are 55 distinct such classes and each torsion element has order of 2,3,4,5,6,8,10 and 12.

  4. Research on Group Learning and Cognitive Science: A Study of Motivation, Knowledge, and Self-Regulation in a Large Lecture College Algebra Class

    Science.gov (United States)

    Miller, David; Schraeder, Matthew

    2015-01-01

    At a research University near the east coast, researchers restructured a College Algebra course by formatting the course into two large lectures a week, an active recitation size laboratory class once a week, and an extra day devoted to active group work called Supplemental Practice (SP). SP was added as an extra day of class where the SP leader…

  5. A case study of Markdale High School's implementation of heterogeneously-grouped classes in English, mathematics, science, and social studies

    Science.gov (United States)

    Pierre-Louis, Fred

    The purpose of this study was to describe Markdale High School's change from separate college preparatory and general level classes to heterogeneously-grouped classes in English, mathematics, science, and social studies, with particular emphasis on the principal's leadership style, change process, and teacher concerns (Hall & Hord, 2006) experienced during this effort. The researcher used Hall and Hord's (2006) Concern-Based Adoption Model (CBAM) as a conceptual framework. Specifically, the researcher applied three elements of the CBAM model: (a) the Twelve Principles of Change, (b) the Change Facilitator Styles, and (c) the Stages of Concerns. Hall and Hord's framework served as a lens through which the researcher analyzed all data. The researcher used a mixed-method (qualitative and quantitative) approach to answer the four research questions. The participants completed three instruments: (a) the Stages of Concern Questionnaire (SoCQ), (b) the Principles of Change Survey, and (c) the Facilitator Style Survey. All three instruments were self-report, paper-pencil surveys. The sample included 72 faculty members who experienced the change over the past three years. Findings from the three data sources and the school principal's comments during debriefing are indicated for each research question and reported by unit of analysis. Respective to the research questions, the researcher concluded that: (1) Markdale High School accomplished the change by implementing both structural and instructional changes supporting to the change to heterogeneous grouping; (2) even though teachers had divergent opinions on the school principal's facilitation style, the principal thought of himself as an incrementalist and a practitioner of differentiated facilitation styles; (3) while half of the faculty felt that they received formal training on heterogeneous grouping, (4) half felt that they did not have a choice in the decision-making process as it occurred with college preparatory and

  6. Adaptive actuator failure compensation control based on MMST grouping for a class of MIMO nonlinear systems with guaranteed transient performance

    Science.gov (United States)

    Zhang, Shao-Jie; Qiu, Xiang-Wei; Jiang, Bin; Liu, Chun-Sheng

    2015-03-01

    This paper presents a new adaptive compensation control approach for a class of multi-input multi-output (MIMO) nonlinear systems with actuator failures. In order to enlarge the set of compensable actuator failures, an actuators grouping scheme based on multiple model switching and tuning (MMST) is proposed for the nonlinear MIMO minimum-phase systems with multiple actuator failures. Then, an adaptive compensation scheme based on prescribed performance bound (PPB) which characterises the convergence rate and maximum overshoot of the tracking error is designed for the systems to ensure closed-loop signal boundedness and asymptotic output tracking despite unknown actuator failures. Simulation results are given to show the effectiveness of the control design.

  7. On Application of Group Psychological Counselling in Class Construction%浅谈团体心理辅导在班级建设中的应用

    Institute of Scientific and Technical Information of China (English)

    任红漫

    2012-01-01

    Group psychological counselling is to carry out psychological training through group activities.In classes which are special groups,group counseling can be applied in class construction,which can be of great significance in strengthening class unity,forming good class atmosphere and promoting healthy psychological growth of students.%团体心理辅导是在一定情景下,通过开展团体活动而进行的心理训练形式。班级作为一个特殊的团体,可以应用团体心理辅导开展班级建设,这对增强班级凝聚力,形成良好的班风以及学生个体的心理健康成长等都有着重要的意义。

  8. The first cohomology of the mapping class group with coefficients in algebraic functions on the SL2(C) moduli space

    DEFF Research Database (Denmark)

    Andersen, Jørgen Ellegaard; Villemoes, Rasmus

    2009-01-01

    Consider a compact surface of genus at least two. We prove that the first cohomology group of the mapping class group with coefficients in the space of algebraic functions on the SL2(C) moduli space vanishes. In the genus one case, this cohomology group is infinite dimensional....

  9. Prevalence of the β(S) gene among scheduled castes, scheduled tribes and other backward class groups in Central India.

    Science.gov (United States)

    Shrikhande, Anuradha V; Arjunan, Aishwarya; Agarwal, Amit; Dani, Aarti; Tijare, Jayashri; Gettig, Elizabeth; Krishnamurti, Lakshmanan

    2014-01-01

    Sickle cell disease is an inherited disorder of the blood, and characterized by vasoocclusive crises (VOC), risks for pneumococcal infections and organ toxicities, is associated with morbidity and premature mortality. India, with a population of 1.2 billion individuals, is estimated to be home to over 50.0% of the world's patients with sickle cell disease. The β(S) gene [β6(A3)Glu→Val; HBB: c.20A>T] has the highest prevalence in three socio-economically disadvantaged ethnic categories: the Scheduled Castes (SC), the Scheduled Tribes (ST), and Other Backward Class (OBC) groups in India. The tradition of endogamy practiced by the ethnic groups in India provides the rationale for the screening of individual populations to better understand the distribution of the β(S) gene, guide counseling and awareness programs and aid development of public policy. We undertook a study to describe the prevalence of the β(S) gene in these ethnic groups in the district of Nagpur, Maharashtra in Central India. Through community screening and subsequent targeted screening of high risk individuals, 35,636 individuals were screened, of whom 5466 were found to have sickle cell trait and 1010 were identified with sickle cell disease. Community screening revealed a sickle cell trait prevalence of 13.0% in the SC, 12.0% in the ST and 3.4% in the OBC population. This study describes the prevalence of the β(S) gene within these groups in Central India determined by large scale community screening. This program has uncovered previously undiagnosed cases, provided detailed information to guide population-based disease counseling, prevention and comprehensive care programs.

  10. Correlation of Shape and Size of Sella Turcica With the Type of Facial Skeletal Class in an Iranian Group

    Directory of Open Access Journals (Sweden)

    Valizadeh

    2015-07-01

    Full Text Available Background In orthodontic science, diagnosis of facial skeletal type (class I, II, and III is essential to make the correct treatment plan that is usually expensive and complicated. Sometimes results from analysis of lateral cephalometry radiographies are not enough to discriminate facial skeletal types. In this situation, knowledge about the relationship between the shape and size of the sella turcica and the type of facial skeletal class can help to make a more definitive decision for treatment plan. Objectives The present study was designed to investigate this relationship in patients referred to a dental school in Iran. Patients and Methods In this descriptive-analytical study, cephalometric radiographies of 90 candidates for orthodontic treatment (44 females and 46 males with an age range of 14 - 26 years and equal distribution in terms of class I, class II, and class III facial skeletal classification were selected. The shape, length, diameter, and depth of the sella turcica were determined on the radiographs. Linear dimensions were assessed by one-way analysis of variance while the correlation between the dimensions and age was investigated using Pearson’s correlation coefficient. Results Sella turcica had normal morphology in 24.4% of the patients while irregularity (notching in the posterior part of the dorsum sella was observed in 15.6%, double contour of sellar floor in 5.6%, sella turcica bridge in 23.3%, oblique anterior wall in 20% and pyramidal shape of the dorsum sella in 11.1% of the subjects. In total, 46.7% of class I patients had a normal shape of sella turcica, 23.3% of class II patients had an oblique anterior wall and a pyramidal shape of the dorsum sella, and 43.3% of class III individuals had sella turcica bridge (the greatest values. Sella turcica length was significantly greater in class III patients compared to class II and class I (P < 0.0001. However, depth and diameter of sella turcica were similar in class I

  11. An Organizational Perspective on the Origins of Instructional Segregation: School Composition and Use of Within-Class Ability Grouping in American Kindergartens

    Science.gov (United States)

    Buttaro, Anthony, Jr.; Catsambis, Sophia; Mulkey, Lynn M.; Steelman, Lala Carr

    2010-01-01

    Background: This investigation was sparked by research findings on secondary education showing school segregation to be closely associated with homogeneous grouping practices, such as tracking and between-class ability grouping. Research Design: We conduct secondary analyses of national data from the Early Childhood Longitudinal Study-Kindergarten…

  12. Microbial Diversity in a Venezuelan Orthoquartzite Cave is Dominated by the Chloroflexi (Class Ktedonobacterales and Thaumarchaeota Group I.1c.

    Directory of Open Access Journals (Sweden)

    Hazel A Barton

    2014-11-01

    Full Text Available The majority of caves are formed within limestone rock and hence our understanding of cave microbiology comes from carbonate-buffered systems. In this paper, we describe the microbial diversity of Roraima Sur Cave, an orthoquartzite (SiO4 cave within Roraima Tepui, Venezuela. The cave contains a high level of microbial activity when compared with other cave systems, as determined by an ATP-based luminescence assay and cell counting. Molecular phylogenetic analysis of microbial diversity within the cave demonstrate the dominance of Actinomycetales and Alphaproteobacteria in endolithic bacterial communities close to the entrance, while communities from deeper in the cave are dominated (82-84% by a unique clade of Ktedonobacterales within the Chloroflexi. While members of this phylum are commonly found in caves, this is the first identification of members of the Class Ktedonobacterales. An assessment of archaeal species demonstrates the dominance of phylotypes from the Thaumarchaeota Group I.1c (100%, which have previously been associated with acidic environments. While the Thaumarchaeota have been seen in numerous cave systems, the dominance of Group I.1c in Roraima Sur Cave is unique and a departure from the traditional archaeal community structure. Geochemical analysis of the cave environment suggests that water entering the cave, rather than the nutrient-limited orthoquartzite rock, provides the carbon and energy necessary for microbial community growth and subsistence, while the poor buffering capacity of quartzite or the low pH of the environment may be selecting for this unusual community structure. Together these data suggest that pH, imparted by the geochemistry of the host rock, can play as important a role in niche-differentiation in caves as in other environmental systems.

  13. Correlation of Shape and Size of Sella Turcica With the Type of Facial Skeletal Class in an Iranian Group

    OpenAIRE

    Valizadeh; Shahbeig; Mohseni,; MR Azimi; Bakhshandeh

    2015-01-01

    Background In orthodontic science, diagnosis of facial skeletal type (class I, II, and III) is essential to make the correct treatment plan that is usually expensive and complicated. Sometimes results from analysis of lateral cephalometry radiographies are not enough to discriminate facial skeletal types. In this situation, knowledge about the relationship between the shape and size of the sella turcica and the type of facial skeletal class can help to make a more definitive deci...

  14. The equation class="cmmi-10">xclass="cmmi-7">pclass="cmmi-10">yclass="cmmi-7">q = class="cmmi-10">zclass="cmmi-7">r and groups that act freely on Λ-trees

    OpenAIRE

    Brady, N; Ciobanu, Laura; De Martino, A.; Rourke, S. O

    2009-01-01

    Let G be a group that acts freely on a Λ-tree, where Λ is an ordered abelian group, and let x,y,z be elements in G. We show that if xpyq = zr with integers p, q, r ≥ 4, then x, y and z commute. As a result, the one-relator groups with xpyq = zr as relator, are examples of hyperbolic and CAT( − 1) groups which do not act freely on any Λ-tree.

  15. The equation class="cmmi-10">xclass="cmmi-7">pclass="cmmi-10">yclass="cmmi-7">q = class="cmmi-10">zclass="cmmi-7">r and groups that act freely on Λ-trees

    OpenAIRE

    Brady, N; Ciobanu, Laura; A de Martino; Rourke, S. O

    2009-01-01

    Let G be a group that acts freely on a Λ-tree, where Λ is an ordered abelian group, and let x,y,z be elements in G. We show that if xpyq = zr with integers p, q, r ≥ 4, then x, y and z commute. As a result, the one-relator groups with xpyq = zr as relator, are examples of hyperbolic and CAT( − 1) groups which do not act freely on any Λ-tree.

  16. The Impact of Homogeneous vs. Heterogeneous Collaborative Learning Groups in Multicultural Classes on the Achievement and Attitudes of Nine Graders towards Learning Science

    Science.gov (United States)

    Faris, Ahmed O.

    2009-01-01

    The current study aims at investigating the impact of homogeneous versus heterogeneous collaborative learning grouping in multicultural classes on the students' achievements and attitudes towards learning science. In the present study, heterogeneity was unpacked through two dimensions: the cultural background, represented by the different…

  17. A Bayesian Approach to a Multiple-Group Latent Class-Profile Analysis: The Timing of Drinking Onset and Subsequent Drinking Behaviors among U.S. Adolescents

    Science.gov (United States)

    Chung, Hwan; Anthony, James C.

    2013-01-01

    This article presents a multiple-group latent class-profile analysis (LCPA) by taking a Bayesian approach in which a Markov chain Monte Carlo simulation is employed to achieve more robust estimates for latent growth patterns. This article describes and addresses a label-switching problem that involves the LCPA likelihood function, which has…

  18. The Effects of Students' in- and out-of-Class Experiences on Their Analytical and Group Skills: A Study of Engineering Education

    Science.gov (United States)

    Strauss, Linda C.; Terenzini, Patrick T.

    2007-01-01

    This study examined the unique and joint contributions of engineering students' classroom and out-of-class experiences on the development of two sets of skills central to students' successful performance as engineers: analytical and group skills. Although the study focuses on engineering, the conceptual underpinnings and criterion measures are…

  19. Implementation of Pair Work and Group Work for Creation of Interaction Opportunities for Learners in Large Classes: The Viability of the Two Strategies

    Science.gov (United States)

    Otienoh, Ruth O.

    2015-01-01

    This paper is based on an action research carried out in two Kenyan Primary schools in Nairobi. The purpose was to implement group work and pair work to improve teaching and learning in large classes by creating interaction opportunities for learners. This was a mixed method study of dominant/less dominant design where interviews and structured…

  20. Does smoking within an individual's peer group affect intervention effectiveness? An evaluation of the Smoke-Free Class Competition among Swiss adolescents

    NARCIS (Netherlands)

    Stucki, S.; Kuntsche, E.N.; Archimi, A.; Kuntsche, S.

    2014-01-01

    OBJECTIVE: The aim of this study is to test whether participation in the Smoke-Free Class Competition (SFC), a classroom-based smoking prevention program, reduced smoking and increased smoking-related knowledge among those with and without smoking peers compared to control groups. METHOD: Including

  1. Comparison of Two Small-Group Learning Methods in 12th-Grade Physics Classes Focusing on Intrinsic Motivation and Academic Performance

    Science.gov (United States)

    Berger, Roland; Hanze, Martin

    2009-01-01

    Twelfth-grade physics classes with 344 students participated in a quasi-experimental study comparing two small-group learning settings. In the jigsaw classroom, in contrast to the cyclical rotation method, teaching expectancy as well as resource interdependence is established. The study is based on the self-determination theory of motivation,…

  2. The Perception of Overweight Pupils by the Group of Pupils during the Physical Education and Sports Class

    Directory of Open Access Journals (Sweden)

    Simona PETRACOVSCHI

    2012-12-01

    Full Text Available Overweight produces discrimination and marginalisation during the physical education and sports (P.E. class. The purpose of this research is to identify the way in which pupils with normal weight perceive their overweight peers, with the aim of identifying the problems of collaboration and co-participation within the teams and pairs established during P.E. classes. The semi-directive interview method was used; it was applied on a class of pupils aged 11 and 12 from a school in Timisoara. The interviews were processed using the thematic analysis and show the fact that pupils with normal weight avoid interacting with the overweight peers for fear of being identified with the latter.

  3. 41 CFR 101-42.1101 - Federal supply classification (FSC) groups and classes which contain hazardous materials.

    Science.gov (United States)

    2010-07-01

    ... device. 2520 Vehicular power transmission components Items containing asbestos. 2530 Vehicular brake... metallic sodium. Group 29 Engine accessories Engine valves containing metallic sodium. Group 30 Mechanical power transmission equipment Equipment containing hazardous hydraulic fluids including PCBs. Group...

  4. Investigation of class 1 integrons in Klebsiella pneumoniae clinical and microbiota isolates belonging to different phylogenetic groups in Recife, State of Pernambuco

    Directory of Open Access Journals (Sweden)

    Alexsandra Maria Silva Lima

    2014-04-01

    Full Text Available Introduction The high prevalence of Klebsiella pneumoniae infections is related to the ability of K. pneumoniae to acquire and disseminate exogenous genes associated with mobile elements, such as R plasmids, transposons and integrons. This study investigated the presence of class 1 integrons in clinical and microbiota isolates of K. pneumoniae belonging to different phylogenetic groups and correlated these results with the antimicrobial resistance profiles of the studied isolates. Methods Of the 51 isolates of K. pneumoniae selected for this study, 29 were from multidrug-resistant clinical isolates, and 22 were from children's microbiota. The susceptibility profile was determined using the disk diffusion method, and class 1 integrons were detected through polymerase chain reaction (PCR. Results The results showed that none of the 22 microbiota isolates carried class 1 integrons. Among the 29 clinical isolates, 19 (65.5% contained class 1 integrons, and resistance to sulfamethoxazole/trimethoprim was identified in 18 of these isolates (94.7%. Among the K. pneumoniae isolates with class 1 integrons, 47% belonged to the KpI phylogenetic group, and one isolate (14.3% carrying these genetic elements belonged to the KpIII group. Conclusions The wide variety of detected class 1 integrons supports the presence of high rates of antimicrobial resistance, genetic variability, and rapid dissemination of beta-lactamase genes among K. pneumoniae clinical isolates in recent years in hospitals in Recife-PE, Brazil. The findings of this study indicate that the surveillance of K. pneumoniae integrons in clinical isolates could be useful for monitoring the spread of antibiotic resistance genes in the hospital environment.

  5. Interactional Concerns in Implementing Group Tasks: Addressing Silence, Dominance, and Off-Task Talk in an Academic Writing Class

    Science.gov (United States)

    Sharma, Bal Krishna

    2015-01-01

    This study investigates the teacher role in mediating the task and the learner in an advanced academic writing class. Having identified three verbal (non-)participation patterns of students in collaborative tasks (silence, dominance, and off-task talk), I examine how these interactional concerns are understood and addressed by English as a second…

  6. Interactional Concerns in Implementing Group Tasks: Addressing Silence, Dominance, and Off-Task Talk in an Academic Writing Class

    Science.gov (United States)

    Sharma, Bal Krishna

    2015-01-01

    This study investigates the teacher role in mediating the task and the learner in an advanced academic writing class. Having identified three verbal (non-)participation patterns of students in collaborative tasks (silence, dominance, and off-task talk), I examine how these interactional concerns are understood and addressed by English as a second…

  7. Technology Supported Facilitation and Assessment of Small Group Collaborative Inquiry Learning in Large First-Year Classes

    Science.gov (United States)

    Lawrie, Gwendolyn A.; Gahan, Lawrence R.; Matthews, Kelly E.; Weaver, Gabriela C.; Bailey, Chantal; Adams, Peter; Kavanagh, Lydia J.; Long, Phillip D.; Taylor, Matthew

    2014-01-01

    Collaborative learning activities offer the potential to support mutual knowledge construction and shared understanding amongst students. Introducing collaborative tasks into large first-year undergraduate science classes to create learning environments that foster student engagement and enhance communication skills is appealing. However,…

  8. 49 CFR 173.127 - Class 5, Division 5.1-Definition and assignment of packing groups.

    Science.gov (United States)

    2010-10-01

    ...) Packing Group II, any material which exhibits a mean pressure rise time less than or equal to the pressure... Packing Group I are not met. (iii) Packing Group III, any material which exhibits a mean pressure rise... packing groups. 173.127 Section 173.127 Transportation Other Regulations Relating to...

  9. The influences of Taiwan's generic grouping price policy on drug prices and expenditures: evidence from analysing the consumption of the three most-used classes of cardiovascular drugs.

    Science.gov (United States)

    Chen, Chi-Liang; Chen, Likwang; Yang, Wei-Chih

    2008-04-12

    Controlling the growth of pharmaceutical expenditures is a major global challenge. Promotion of generic drug prescriptions or use is gaining increased support. There are substantial contextual differences in international experiences of implementing pharmaceutical policies related to generic drugs. Reporting these experiences from varied perspectives can inform future policy making. This study describes an experience of Taiwan, where patients with chronic (long-term) conditions are usually managed in hospitals and drugs are provided in this setting with costs reimbursed through the National Health Insurance (NHI). It investigates the effects of Taiwan's reimbursement rate adjustment based on chemical generic grouping in 2001. This research also demonstrates the use of micro-level longitudinal data to generate policy-relevant information. The research can be used to improve efficiency of health care resource use. We chose the three most-used classes of cardiovascular drugs for this investigation: beta blocking agents, calcium channel blockers mainly with vascular effects, and plain ACE inhibitors. For each drug class, we investigated changes in daily expense, consumption volume, and total expenditures from a pre-action period to a corresponding post-action period. We compared an exposure or "intervention" group of patients targeted by the action with a comparisonor "control" group of patients not targeted by the action. The data sources are a longitudinal database for 200,000 NHI enrolees, corresponding NHI registration data of health care facilities, and an archive recording all historical data on the reimbursement rates of drugs covered by the NHI. We adopted a fixed effects linear regression model to control for unobserved heterogeneity among patient-hospital groups. Additional descriptive statistics were applied to examine whether any inappropriate consumption of drugs in the three classes existed. The daily drug expense significantly decreased from the pre

  10. The influences of Taiwan's generic grouping price policy on drug prices and expenditures: Evidence from analysing the consumption of the three most-used classes of cardiovascular drugs

    Directory of Open Access Journals (Sweden)

    Chen Likwang

    2008-04-01

    Full Text Available Abstract Background Controlling the growth of pharmaceutical expenditures is a major global challenge. Promotion of generic drug prescriptions or use is gaining increased support. There are substantial contextual differences in international experiences of implementing pharmaceutical policies related to generic drugs. Reporting these experiences from varied perspectives can inform future policy making. This study describes an experience of Taiwan, where patients with chronic (long-term conditions are usually managed in hospitals and drugs are provided in this setting with costs reimbursed through the National Health Insurance (NHI. It investigates the effects of Taiwan's reimbursement rate adjustment based on chemical generic grouping in 2001. This research also demonstrates the use of micro-level longitudinal data to generate policy-relevant information. The research can be used to improve efficiency of health care resource use. Methods We chose the three most-used classes of cardiovascular drugs for this investigation: beta blocking agents, calcium channel blockers mainly with vascular effects, and plain ACE inhibitors. For each drug class, we investigated changes in daily expense, consumption volume, and total expenditures from a pre-action period to a corresponding post-action period. We compared an exposure or "intervention" group of patients targeted by the action with a comparisonor "control" group of patients not targeted by the action. The data sources are a longitudinal database for 200,000 NHI enrolees, corresponding NHI registration data of health care facilities, and an archive recording all historical data on the reimbursement rates of drugs covered by the NHI. We adopted a fixed effects linear regression model to control for unobserved heterogeneity among patient-hospital groups. Additional descriptive statistics were applied to examine whether any inappropriate consumption of drugs in the three classes existed. Results The daily

  11. On group psychological counseling in college class construction%团体心理辅导在高校班级建设中的应用探索

    Institute of Scientific and Technical Information of China (English)

    范乾坤

    2012-01-01

      目前,高校班级建设中存在着凝聚力、归属感缺乏等问题,文章对团体心理辅导引入班级建设的可行性进行了探索,并通过实际案例介绍了团体心理辅导在班级建设中的应用。%  At present, the existing problems such as lack of cohesion and sense of belonging, This article explores the class construction feasibility to take group psychological counseling into undertook ation , and through an actual case, introduces application of the group psychological tutorship in class construction.

  12. ON IDEAL CLASS GROUPS AND UNITS IN TERMS OF THE QUADRATIC FORM x2 + 32y2

    Institute of Scientific and Technical Information of China (English)

    JURGEN HURRELBRINK; YUE QIN

    2005-01-01

    For quadratic number fields F = Q(√2pl … pt-1 ) with primes pj ≡ 1 mod 8, the authors study the class number and the norm of the fundamental unit of F. The results generalize nicely what has been familiar for the fields Q(√2p) with a prime p ≡ 1 mod 8, including density statements. And the results are stated in terms of the quadratic form x2 + 32y2 and illustrated in terms of graphs.

  13. Psychosocial stress but not exercise increases cortisol and reduces state anxiety levels in school classes - results from a stressor applicable in large group settings.

    Science.gov (United States)

    Wegner, Mirko; Müller-Alcazar, Anett; Jäger, Anika; Machado, Sergio; Arias-Carrión, Oscar; Budde, Henning

    2014-01-01

    Both, psychosocial stress and exercise in the past have been used as stressors to elevate saliva cortisol and change state anxiety levels. In the present study, high-school students at the age of 14 were randomly assigned to three experimental groups: (1) an exercise group (n = 18), that was running 15 minutes at a medium intensity level of 65-75% HRmax, (2) a psychosocial stress group (n = 19), and (3) a control group (n = 18). The psychosocial stress was induced to the students by completing a standardized intelligence test under the assumption that their IQ scores would be made public in class. Results display that only psychosocial stress but not exercise was able to significantly increase cortisol levels but decreased cognitive state anxiety in adolescents. The psychosocial stress protocol applied here is proposed for use in future stress studies with children or adolescents in group settings, e.g., in school.

  14. Small-group learning in an upper-level university biology class enhances academic performance and student attitudes toward group work.

    Science.gov (United States)

    Gaudet, Andrew D; Ramer, Leanne M; Nakonechny, Joanne; Cragg, Jacquelyn J; Ramer, Matt S

    2010-12-29

    To improve science learning, science educators' teaching tools need to address two major criteria: teaching practice should mirror our current understanding of the learning process; and science teaching should reflect scientific practice. We designed a small-group learning (SGL) model for a fourth year university neurobiology course using these criteria and studied student achievement and attitude in five course sections encompassing the transition from individual work-based to SGL course design. All students completed daily quizzes/assignments involving analysis of scientific data and the development of scientific models. Students in individual work-based (Individualistic) sections usually worked independently on these assignments, whereas SGL students completed assignments in permanent groups of six. SGL students had significantly higher final exam grades than Individualistic students. The transition to the SGL model was marked by a notable increase in 10th percentile exam grade (Individualistic: 47.5%; Initial SGL: 60%; Refined SGL: 65%), suggesting SGL enhanced achievement among the least prepared students. We also studied student achievement on paired quizzes: quizzes were first completed individually and submitted, and then completed as a group and submitted. The group quiz grade was higher than the individual quiz grade of the highest achiever in each group over the term. All students--even term high achievers--could benefit from the SGL environment. Additionally, entrance and exit surveys demonstrated student attitudes toward SGL were more positive at the end of the Refined SGL course. We assert that SGL is uniquely-positioned to promote effective learning in the science classroom.

  15. Small-Group Learning in an Upper-Level University Biology Class Enhances Academic Performance and Student Attitudes Toward Group Work

    Science.gov (United States)

    Nakonechny, Joanne; Cragg, Jacquelyn J.; Ramer, Matt S.

    2010-01-01

    To improve science learning, science educators' teaching tools need to address two major criteria: teaching practice should mirror our current understanding of the learning process; and science teaching should reflect scientific practice. We designed a small-group learning (SGL) model for a fourth year university neurobiology course using these criteria and studied student achievement and attitude in five course sections encompassing the transition from individual work-based to SGL course design. All students completed daily quizzes/assignments involving analysis of scientific data and the development of scientific models. Students in individual work-based (Individualistic) sections usually worked independently on these assignments, whereas SGL students completed assignments in permanent groups of six. SGL students had significantly higher final exam grades than Individualistic students. The transition to the SGL model was marked by a notable increase in 10th percentile exam grade (Individualistic: 47.5%; Initial SGL: 60%; Refined SGL: 65%), suggesting SGL enhanced achievement among the least prepared students. We also studied student achievement on paired quizzes: quizzes were first completed individually and submitted, and then completed as a group and submitted. The group quiz grade was higher than the individual quiz grade of the highest achiever in each group over the term. All students – even term high achievers –could benefit from the SGL environment. Additionally, entrance and exit surveys demonstrated student attitudes toward SGL were more positive at the end of the Refined SGL course. We assert that SGL is uniquely-positioned to promote effective learning in the science classroom. PMID:21209910

  16. Small-group learning in an upper-level university biology class enhances academic performance and student attitudes toward group work.

    Directory of Open Access Journals (Sweden)

    Andrew D Gaudet

    Full Text Available To improve science learning, science educators' teaching tools need to address two major criteria: teaching practice should mirror our current understanding of the learning process; and science teaching should reflect scientific practice. We designed a small-group learning (SGL model for a fourth year university neurobiology course using these criteria and studied student achievement and attitude in five course sections encompassing the transition from individual work-based to SGL course design. All students completed daily quizzes/assignments involving analysis of scientific data and the development of scientific models. Students in individual work-based (Individualistic sections usually worked independently on these assignments, whereas SGL students completed assignments in permanent groups of six. SGL students had significantly higher final exam grades than Individualistic students. The transition to the SGL model was marked by a notable increase in 10th percentile exam grade (Individualistic: 47.5%; Initial SGL: 60%; Refined SGL: 65%, suggesting SGL enhanced achievement among the least prepared students. We also studied student achievement on paired quizzes: quizzes were first completed individually and submitted, and then completed as a group and submitted. The group quiz grade was higher than the individual quiz grade of the highest achiever in each group over the term. All students--even term high achievers--could benefit from the SGL environment. Additionally, entrance and exit surveys demonstrated student attitudes toward SGL were more positive at the end of the Refined SGL course. We assert that SGL is uniquely-positioned to promote effective learning in the science classroom.

  17. Using In-class Group Exercises to Enhance Lectures and Provide Introductory Physics Students an Opportunity to Perfect Problem Solving Skills through Interactions with Fellow Students

    Science.gov (United States)

    Trout, Joseph; Bland, Jared

    2013-03-01

    In this pilot project, one hour of lecture time was replaced with one hour of in-class assignments, which groups of students collaborated on. These in-class assignments consisted of problems or projects selected for the calculus-based introductory physics students The first problem was at a level of difficulty that the majority of the students could complete with a small to moderate amount of difficulty. Each successive problem was increasingly more difficult, the last problem being having a level of difficulty that was beyond the capabilities of the majority of the students and required some instructor intervention. The students were free to choose their own groups. Students were encouraged to interact and help each other understand. The success of the in-class exercises were measured using pre-tests and post-tests. The pre-test and post-test were completed by each student independently. Statistics were also compiled on each student's attendance record and the amount of time spent reading and studying, as reported by the student. Statistics were also completed on the student responses when asked if they had sufficient time to complete the pre-test and post-test and if they would have completed the test with the correct answers if they had more time. The pre-tests and post-tests were not used in the computation of the grades of the students.

  18. Biochemical identification of the bovine blood group M' antigen as a major histocompatibility complex class I-like molecule

    DEFF Research Database (Denmark)

    Hønberg, L S; Larsen, B; Koch, C

    1995-01-01

    Absorption and elution experiments showed that it was impossible to separate antibodies against blood group factor M' from antibodies against bovine lymphocyte antigen (BoLA) A16 in an antiserum showing haemolytic activity against M' as well as lymphocytotoxic activity against BoLA-A16. To elucid......Absorption and elution experiments showed that it was impossible to separate antibodies against blood group factor M' from antibodies against bovine lymphocyte antigen (BoLA) A16 in an antiserum showing haemolytic activity against M' as well as lymphocytotoxic activity against BoLA-A16...

  19. p-Quaterphenyls laterally substituted with a dimesitylboryl group: a promising class of solid-state blue emitters.

    Science.gov (United States)

    Fu, Guang-Liang; Zhang, Hong-Yu; Yan, Yi-Qiao; Zhao, Cui-Hua

    2012-02-17

    A new family of p-quaterphenyls 1-6 laterally substituted with a bulky electron-accepting dimesitylboryl group has been designed and synthesized. These compounds were characterized by X-ray crystallography, UV-vis and fluorescence spectroscopy, and DFT calculations as well as thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and cyclic voltammetry (CV). X-ray single-crystal analysis revealed that the p-quaterphenyl main chain framework exhibits a twisted structure due to the steric effect of the lateral boryl group, and the intermolecular interactions are effectively suppressed in the solid state. Despite the significantly twisted main-chain structure, these molecules still display efficient intramolecular charge-transfer emissions with large Stokes shifts. An intriguing finding is that all these molecules show bright fluorescence with good to excellent quantum yields in the blue region in the solid state. In addition, the two representative p-quaterphenyls 3 and 4 containing both the electron-accepting boryl group and the electron-donating carbazolyl (3) or diphenylamino group (4) possess high thermal stability and good oxidation-reduction reversibility, which together with their excellent solid-state fluorescence efficiency make them promising bipolar transporting blue emitters.

  20. Using the IGCRA (individual, group, classroom reflective action technique to enhance teaching and learning in large accountancy classes

    Directory of Open Access Journals (Sweden)

    Cristina Poyatos

    2011-02-01

    Full Text Available First year accounting has generally been perceived as one of the more challenging first year business courses for university students. Various Classroom Assessment Techniques (CATs have been proposed to attempt to enrich and enhance student learning, with these studies generally positioning students as learners alone. This paper uses an educational case study approach and examines the implementation of the IGCRA (individual, group, classroom reflective action technique, a Classroom Assessment Technique, on first year accounting students’ learning performance. Building on theoretical frameworks in the areas of cognitive learning, social development, and dialogical learning, the technique uses reports to promote reflection on both learning and teaching. IGCRA was found to promote feedback on the effectiveness of student, as well as teacher satisfaction. Moreover, the results indicated formative feedback can assist to improve the learning and learning environment for a large group of first year accounting students. Clear guidelines for its implementation are provided in the paper.

  1. Type synthesis of a class of spatial lower-mobility parallel mechanisms with orthogonal arrangement based on Lie group enumeration

    Institute of Scientific and Technical Information of China (English)

    DAI; Jian; S.

    2010-01-01

    Type synthesis of lower-mobility parallel mechanisms (PMs) has drawn extensive interests, particularly two main approaches were established by using the reciprocal screw system theory and Lie group theory, respectively. Although every above approach provides a universal framework for structural design of general lower-mobility PMs, type synthesis is still a comparably difficult task for the PMs with particular geometry or required to fulfill some specified tasks. This paper aims at exploring a simple and effective synthesis method for lower-mobility parallel mechanisms with orthogonal arrangement (OPMs), and the applied mathematical tool is established in the displacement group theory. For this purpose, the concept of the Cartesian DOF-characteristic matrix, originated from canonical displacement subgroup and displacement submanifold, is proposed. A new approach based on combination of the atlas of Cartesian DOF-characteristic matrix and displacement group-theoretic method is addressed for both exhaustive classification and type synthesis of OPMs. Type synthesis for some representatives of 3-DOF OPMs verifies effectiveness of the proposed approach.

  2. Weil Representation of a Generalized Linear Group over a Ring of Truncated Polynomials over a Finite Field Endowed with a Second Class Involution

    OpenAIRE

    Frez, Luis Gutiérrez; Pantoja, José

    2015-01-01

    We construct a complex linear Weil representation $\\rho$ of the generalized special linear group $G={\\rm SL}_*^{1}(2,A_n)$ ($A_n=K[x]/\\langle x^n\\rangle$, $K$ the quadratic extension of the finite field $k$ of $q$ elements, $q$ odd), where $A_n$ is endowed with a second class involution. After the construction of a specific data, the representation is defined on the generators of a Bruhat presentation of $G$, via linear operators satisfying the relations of the presentation. The structure of ...

  3. 阿贝尔群与极大类p-群的半直积的Coleman自同构%Coleman Automorphisms of Semidirect Products of Abelian Groups by p-groups of Maximal Class

    Institute of Scientific and Technical Information of China (English)

    李正兴; 海进科

    2012-01-01

    设G=A×P是阿贝尔群A与极大类p-群P的半直积,其中P中的元以幂自同构的方式作用于A.该文证明了G的每个Coleman自同构都是内自同构.作为该结果的一个直接推论,作者得到了这样的群G有正规化子性质.%Let G = A × P be the semidirect product of an abelian group A and a p-group P of maximal class, where P acts on A by leaving every cyclic subgroup of A invariant. It is shown that every Coleman automorphism of G is an inner automorphism. As an immediate consequence, we obtain that the normalizer property holds for such group G.

  4. Research of the Teaching in Large Class, Guiding in Small Class Teaching Mode for Circuit Course Group%电路课群大班上课和小班辅导模式的研究

    Institute of Scientific and Technical Information of China (English)

    黄锦安; 蔡小玲; 徐行健

    2012-01-01

    本文针对学科基础课存在的学时数少,信息含量多,青年教师教学经验不足的现状,在电路、电工课群中探索提高教学效果,保证教学质量的教学模式一大班上课,小班辅导。研究结果表明该教学模式所花时间不多,实效明显;青年教师的教学能力也快速提升。%The basic courses contain much information, but the teaching time is less in general, and many young teachers lack teaching experience. Based on the situation, the teaching mode of teaching in large class, guiding in small class is explored in the circuit, electrotechnics course group. The result shows that this teaching mode had excellent effects for a short time and the teaching abilities of young teachers have been promoted quickly.

  5. Representações do corpo: com a palavra um grupo de adolescentes de classes populares Representations of the body: with the word one group of adolescents from popular classes

    Directory of Open Access Journals (Sweden)

    Patrícia Déa Braga

    2010-01-01

    Full Text Available Diante da grande preocupação com a estética corporal demonstrada por um grupo de adolescentes de classes populares, o presente estudo teve como objetivo conhecer e analisar as suas representações sociais de corpo. Tratou-se de investigação de abordagem qualitativa realizada com adolescentes trabalhadores vinculados ao Centro Salesiano do Menor, em Vitória (ES. Uma amostra aleatória foi selecionada de um grupo de 334 sujeitos. Oito meninas e sete meninos foram abordados por meio de entrevista não-estruturada. A partir da análise de suas falas, foi realizada uma categorização e utilizada a teoria das representações sociais para sua discussão. Os resultados apontaram que a percepção de corpo, tanto para meninos quanto para as meninas, está voltada para as idéias de proporcionalidade, normalidade e perfeição. Quanto às consequências de não ter o corpo ideal, ambos apontaram situações como exclusão, doenças, infelicidade e até morte. Aprofundar o conhecimento sobre a percepção, os pensamentos e sentimentos dos adolescentes relativos ao corpo pode contribuir para subsidiar intervenções nesse grupo, ampliando significativamente o âmbito de atuação dos profissionais na área da saúde.In view of the great body aesthetic concern demonstrated by a group of adolescents from popular classes, this study had the purpose of getting to know and analyze the social representations of the body. It investigated the qualitative approach carried out with adolescent workers from the Centro Salesiano do Menor, in Vitória, Espírito Santo State. A random sample was selected from a group of 334 individuals. Eight girls and seven boys were approached by means of non-structured interview. From the analysis of their speeches, a categorization was performed and the theory of the Social Representations was used for discussion. The results pointed out that body perception, for boys as well as for girls, are focused on the ideas of

  6. Social class versus cultural identity as factors in the residential segregation of ethnic groups in Toronto, Montreal and Vancouver for 2001

    Directory of Open Access Journals (Sweden)

    Balakrishnan, T.R.

    2005-01-01

    Full Text Available EnglishThis article examines the relevance of the spatial assimilation model inunderstanding residential segregation of ethnic groups in the three largestgateway cities of Canada. Using data from the census of 2001 it finds that whilethe model may have worked for the European groups they are less applicable tothe visible minorities such as the Chinese, South Asians and Blacks. Residentialsegregation reduces with generation for the European groups but not for thevisible minorities. Canadian patterns seem to be different from that seen in theUnited States. Many visible minority groups maintain their concentration levelseven in the suburbs. The findings seem to indicate that cultural preferences maybe just as important as social class in the residential choices of visible minoritygroups.FrenchCet article examine la pertinence du modèle d’assimilation spatiale dans lacompréhension de la ségrégation résidentielle des groupes ethniques dans lestrois villes « portes d’entrée les plus importantes du Canada. En s’appuyantsure les données du Recensement de 2001, cet article démontre que même si cemodèle ait pu fonctionner pour les groupes européens, il ne s’applique pasautant aux groupes tels que les Chinois, les Sud-Asiatiques et les Noirs. Laségrégation résidentielle diminue avec les générations chez les groupeseuropéens mais ceci n’est pas le cas chez les groupes de minorités visibles. Lestendances canadiennes semblent être différentes que celles observées aux États-Unis. Beaucoup de groupes de minorités visibles maintiennent leur niveau deconcentration même dans les banlieues. Les études menées semblent indiquerque la préférence culturelle pourrait jouer un rôle aussi important que la classesociale dans les choix de résidence que prennent les minorités visibles.

  7. WORKING GROUP ON DRY GRASSLANDS IN THE NORDIC AND BALTIC REGION - OUTLINE OF THE PROJECT AND FIRST RESULTS FOR THE CLASS FESTUCO-BROMETEA

    Directory of Open Access Journals (Sweden)

    GERMUD TYLER

    2006-01-01

    Full Text Available The vegetation databank established by our working group covers the classes FestucoBrametea. Koelerio-Corynephoretea, and Trifolio-Geranietea sanguinei in the Nordic and Baltic region. i.e. NE Germany, Denmark, Norway, Sweden, Finland. N Poland. Lithuania, Latvia, Estonia. and NW Russia. We aim to use these data to develop a consistent supra-national phy~ tosociological classification of these xerothermic vegetation types in the study area and to analyse their biodiversity patterns. Up to now, we located some 12,500 releves meeting our criteria, and more than 3.500 of them have already been included in the databank. We give an overview of the properties of these releves as regards coverage of syntaxa and countries, source types, plot sizes, and cryptogam treatment. We also present first analyses for the basiphilous semi·dry grasslands (Brachypodietalia pinnati within the Festuco-Brometea. For this group of communities, many different and incompatible classification schemes have been proposed. We givc an overview of the alliance and aSsociation names that have been in use for them in the study area, accompanied by a nomenclatural assessment. The releves presently included in the databank havc been tentatively assigned to those vegetation classes whose diagnostic taxa were prevailing. Accordingly, morc than 2.000 releves have been placed in the Festuco-Brometea. These show considerable floristic differenccs compared to stands of the southern temperate Brachypodietalia pinnati alliances Bromion erecti, Cirsio-Brachypodion pinnati, and Agrostionvinealis. The presence degrees of Avenula pratensis and Homalothecium lutescens, for instance, are significantly increased in the study area, and those of Festuca rupieola and Euphorbia cyparissias decreased. An analysis of the species-area relationship yielded a power function with z = 0.09 which is considerably lower than increments determined by nested-plot analyses of this community type, indicating the

  8. WORKING GROUP ON DRY GRASSLANDS IN THE NORDIC AND BALTIC REGION - OUTLINE OF THE PROJECT AND FIRST RESULTS FOR THE CLASS FESTUCO-BROMETEA

    Directory of Open Access Journals (Sweden)

    JURGEN DENGLER

    2006-05-01

    Full Text Available The vegetation databank established by our working group covers the classes FestucoBrametea. Koelerio-Corynephoretea, and Trifolio-Geranietea sanguinei in the Nordic and Baltic region. i.e. NE Germany, Denmark, Norway, Sweden, Finland. N Poland. Lithuania, Latvia, Estonia. and NW Russia. We aim to use these data to develop a consistent supra-national phy~ tosociological classification of these xerothermic vegetation types in the study area and to analyse their biodiversity patterns. Up to now, we located some 12,500 releves meeting our criteria, and more than 3.500 of them have already been included in the databank. We give an overview of the properties of these releves as regards coverage of syntaxa and countries, source types, plot sizes, and cryptogam treatment. We also present first analyses for the basiphilous semi·dry grasslands (Brachypodietalia pinnati within the Festuco-Brometea. For this group of communities, many different and incompatible classification schemes have been proposed. We givc an overview of the alliance and aSsociation names that have been in use for them in the study area, accompanied by a nomenclatural assessment. The releves presently included in the databank havc been tentatively assigned to those vegetation classes whose diagnostic taxa were prevailing. Accordingly, morc than 2.000 releves have been placed in the Festuco-Brometea. These show considerable floristic differenccs compared to stands of the southern temperate Brachypodietalia pinnati alliances Bromion erecti, Cirsio-Brachypodion pinnati, and Agrostionvinealis. The presence degrees of Avenula pratensis and Homalothecium lutescens, for instance, are significantly increased in the study area, and those of Festuca rupieola and Euphorbia cyparissias decreased. An analysis of the species-area relationship yielded a power function with z = 0.09 which is considerably lower than increments determined by nested-plot analyses of this community type, indicating the

  9. EFFORTS TO INCREASE THE ABILITY TO CHOOSE A SCHOOL GROUP COUNSELING SERVICES THROUGH ADVANCED CLASS IX SMP NEGERI 2 METRO STATE IN 2013

    Directory of Open Access Journals (Sweden)

    Rohima Rohima

    2016-06-01

    Full Text Available SMP Negeri 2 Metro In reality, there are many confused students choose a major program of advanced studies, especially for junior high school students. It is necessary to learn / coaching to the students to be able to choose the school accordingly. Researchers conduct action research through the Guidance Counseling Group in Class IX student of SMP Negeri 2 Metro. The experiment was conducted using two cycles. Recapitulation of data Selecting a program majoring in the process of learning / coaching from the first cycle to the second cycle, there is an increase of 57.06% to 86.35%. The results of the data summary portfolio also increased from 33.32% to 83.33%, and the recapitulation of learning outcomes of students who otherwise Completed Pass also risen from 54.54% increase to 96.96%. Thus concluded indicator of success is to reach the target / as are 95% or more. Keywords: guidance group, select schools, smp negeri 2 metro

  10. EFFORTS TO INCREASE THE ABILITY TO CHOOSE A SCHOOL GROUP COUNSELING SERVICES THROUGH ADVANCED CLASS IX SMP NEGERI 2 METRO STATE IN 2013

    Directory of Open Access Journals (Sweden)

    Rohima Rohima

    2016-06-01

    Full Text Available SMP Negeri 2 Metro In reality, there are many confused students choose a major program of advanced studies, especially for junior high school students. It is necessary to learn / coaching to the students to be able to choose the school accordingly. Researchers conduct action research through the Guidance Counseling Group in Class IX student of SMP Negeri 2 Metro. The experiment was conducted using two cycles. Recapitulation of data Selecting a program majoring in the process of learning / coaching from the first cycle to the second cycle, there is an increase of 57.06% to 86.35%. The results of the data summary portfolio also increased from 33.32% to 83.33%, and the recapitulation of learning outcomes of students who otherwise Completed Pass also risen from 54.54% increase to 96.96%. Thus concluded indicator of success is to reach the target / as are 95% or more.Keywords: guidance group, select schools, smp negeri 2 metro

  11. Analysis of genetic variants of class II cytokine and their receptor genes in psoriasis patients of two ethnic groups from the Volga-Ural region of Russia.

    Science.gov (United States)

    Galimova, Elvira; Akhmetova, Vita; Latipov, Boris; Kingo, Külli; Rätsep, Ranno; Traks, Tanel; Kõks, Sulev; Khusnutdinova, Elza

    2012-10-01

    The molecular basis of pathogenesis of psoriasis remains unclear, but one unifying hypothesis of disease aetiology is the cytokine network model. The class II cytokines (CF2) and their receptors (CRF2) are all involved in the inflammatory processes and single nucleotide polymorphisms (SNPs) in respective genes have been associated with psoriasis in a previous study of the Estonian population. We performed a replication study of 47 SNPs in CF2 and CRF2 genes in independent cohorts of psoriasis patients of two ethnic groups (Russians and Bashkirs) from the Volga-Ural region of Russia. DNA was obtained from 395 psoriasis patients of two ethnic groups from the Volga-Ural region of Russia and 476 ethnically matched controls. 47 SNPs in the loci of the genes encoding Class II cytokines and their receptors were selected by SNPbrowser version 3.5. Genotyping was performed using the SNPlex™ (Applied Biosystems) platform. The genetic variant rs30461 previously associated in original case-control study in Estonians, was also associated in Russians (corrected P-value (Pc=0.008, OR=0.44), but did not reach statistical significance in the Bashkir population. Additionally, the haplotype analysis provided that CC haplotype formed by the SNPs rs30461 and rs955155 had a protective effect in Russians (Pc=0.0024, OR=0.44), supporting the involvement of this locus in the protection against psoriasis. Combined meta-analysis of three populations, including 943 psoriasis patients and 812 healthy controls, showed that the IL29 rs30461 C-allele was not associated with decreased risk of psoriasis (P=0.165, OR=0.68). Moreover, stratification of studies by ethnicity revealed a significant association in the European cohort (P=9.506E-006, OR=0.53). Therefore, there is no overall evidence of association between psoriasis and SNP rs30461 of the IL29 gene, but there is some evidence to suggest that an association exists in Europeans. However, this current concept should be considered as

  12. Group-specific PCR-RFLP and real-time PCR methods for detection and tentative discrimination of strictly anaerobic beer-spoilage bacteria of the class Clostridia.

    Science.gov (United States)

    Juvonen, Riikka; Koivula, Teija; Haikara, Auli

    2008-07-15

    The strictly anaerobic brewery contaminants of the genera Pectinatus, Megasphaera, Selenomonas and Zymophilus in the class Clostridia constitute an important group of spoilage bacteria of unpasteurised, packaged beers. The aim of this study was to develop and evaluate group-specific PCR methods to detect and differentiate these bacteria in beer. A group-specific primer pair targeting a 342-bp variable region of the 16S rRNA gene was designed and evaluated in end-point PCR with gel electrophoresis and in real-time PCR with SYBR Green I dye. Significant cross-reactions with DNAs from any of the forty-two brewery-related, non-target microbes or from real brewery samples were not detected in either PCR system. The group-specific end-point and real-time PCR products could be differentiated according to species/genus and spoilage potential using restriction fragment length polymorphism (KpnI, XmnI, BssHII, ScaI) and melting point curve analysis, respectively. In combination with a rapid DNA extraction method, the PCR reactions detected ca 10(0)-10(3) CFU per 25 ml of beer depending on the strain and on the PCR system. The end-point and real-time PCR analysis took 6-7 h and 2-3 h, respectively. Pre-PCR enrichment of beer samples for 1-3 days ensured the detection of even a single cultivable cell. The PCR and cultivation results of real brewery samples were mostly congruent but the PCR methods were occasionally more sensitive. The PCR methods developed allow the detection of all the nine beer-spoilage Pectinatus, Megasphaera, Selenomonas and Zymophilus species in a single reaction and their differentiation below group level and reduce the analysis time for testing of their presence in beer samples by 1-2 days. The methods can be applied for brewery routine quality control and for studying occurrence, diversity and numbers of the strictly anaerobic beer spoilers in the brewing process.

  13. Investigate and Analyze on Class Group Cohesion of Institute of Physical Education%体育学院班级团队凝聚力现状调查与分析

    Institute of Scientific and Technical Information of China (English)

    贺小卫

    2012-01-01

    采用自编《体育学院班集体的团队凝聚力》问卷,从学习和生活角度对体育学院班集体团队凝聚力现状进行了调查分析。结果表明:体育学院班集体团队凝聚力整体水平不高,在四个因子方面,班级活动团队凝聚力最高,宿舍和文化课的团队凝聚力中等,其他课余生活团队凝聚力最低;不同年级、不同专业之间,其班集体团队凝聚力水平在部分因子中存在显著差异性。%From the perspective of learning and living,the article investigates the class group cohesion of students from the Institute of Physical Education by using questionnaire of class group cohesion of students from the Institute of Physical Education.The result shows that whole level of class group cohesion of students from the Institute of Physical Education is low.And the four factors situate in different levels.The class activities situate in the highest level for the class group cohesion,while the extracurricular life situates in the lowest level.There is significant difference in part of the levels between different faculties and different grades.The analysis result provides evidence for improving class group cohesion,class management and class building of students from the Institute of Physical Education.

  14. 可极化Carnot群上一类非散度型方程的非平凡解%NONTRIVIAL SOLUTIONS FOR A CLASS OF NON-DIVERGENCE EQUATIONS ON POLARIZABLE CARNOT GROUP

    Institute of Scientific and Technical Information of China (English)

    刘海峰; 钮鹏程

    2006-01-01

    Some new properties of polarizable Carnot group are given. By choosing a proper constant a nontrivial solution of a class of non-divergence Dirichlet problem on the polarizable Carnot group is constructed. Thus the multi-solution property of corresponding nonhomogeneous Dirichlet problem is proved and the best possible of LQ norm in the famous Alexandrov-Bakelman-Pucci type estimate is discussed.

  15. Group sequential monitoring based on the weighted log-rank test statistic with the Fleming-Harrington class of weights in cancer vaccine studies.

    Science.gov (United States)

    Hasegawa, Takahiro

    2016-09-01

    In recent years, immunological science has evolved, and cancer vaccines are now approved and available for treating existing cancers. Because cancer vaccines require time to elicit an immune response, a delayed treatment effect is expected and is actually observed in drug approval studies. Accordingly, we propose the evaluation of survival endpoints by weighted log-rank tests with the Fleming-Harrington class of weights. We consider group sequential monitoring, which allows early efficacy stopping, and determine a semiparametric information fraction for the Fleming-Harrington family of weights, which is necessary for the error spending function. Moreover, we give a flexible survival model in cancer vaccine studies that considers not only the delayed treatment effect but also the long-term survivors. In a Monte Carlo simulation study, we illustrate that when the primary analysis is a weighted log-rank test emphasizing the late differences, the proposed information fraction can be a useful alternative to the surrogate information fraction, which is proportional to the number of events. Copyright © 2016 John Wiley & Sons, Ltd.

  16. 构建班级学科QQ群的成人学习模式%On the Adult Learning Model of Constructing Class Dis-cipline QQ Group

    Institute of Scientific and Technical Information of China (English)

    张金兰; 周维华

    2014-01-01

    随着互联网技术的飞速发展和手机移动上网的普及,借助于QQ的共享功能和交流优势,克服成人学生的工学矛盾,提高成人教学质量,必将成为成人教育的时代潮流。成人学生可以通过构建“班级学科QQ群”这一平台,学习课程内容,参与质疑研讨,交流工作经验,提交课程作业或学习体会,完成学习任务,提升知识水平。%With the rapid development of the Internet technolo-gy and the popularity of mobile Internet, it will become the trend of the times of adult education to overcome the contra-diction between work and study of adult students and improve the quality of adult teaching by means of the sharing function and communication advantage of QQ. Adult students can learn course content, participate in question discussion, exchange work experience, submit course work or learning experience, complete learning task and enhance knowledge level by build-ing the platform of the"class discipline QQ group".

  17. Improving Reading Achievement of Chapter 1 Pull-Out Students through Self-Esteem Building Classes Involving Buddy Group and Teacher Participation.

    Science.gov (United States)

    Hershfield, Marlene

    A practicum attempted to improve the low reading achievement of Chapter 1 students in a low socioeconomic fifth-grade class by implementing a self-esteem building program. Activities were designed in a workbook format to complement class instruction in self-esteem building exercises. An emphasis on critical thinking skills was incorporated into…

  18. Loosely coupled class families

    DEFF Research Database (Denmark)

    Ernst, Erik

    2001-01-01

    are expressed using virtual classes seem to be very tightly coupled internally. While clients have achieved the freedom to dynamically use one or the other family, it seems that any given family contains a xed set of classes and we will need to create an entire family of its own just in order to replace one......Families of mutually dependent classes that may be accessed polymor- phically provide an advanced tool for separation of concerns, in that it enables client code to use a group of instances of related classes safely without depending on the exact classes involved. However, class families which...... of the members with another class. This paper shows how to express class families in such a manner that the classes in these families can be used in many dierent combinations, still enabling family polymorphism and ensuring type safety....

  19. Finite Nilpotent Groups with 5 Conjugacy Classes of Noncyclic Subgroups%非循环子群共轭类个数为5的有限幂零群

    Institute of Scientific and Technical Information of China (English)

    郭凯艳; 曹洪平; 陈贵云

    2012-01-01

    给出了非循环子群共轭类个数为5的有限幂零群的分类.由此,对非循环子群共轭类个数不大于5的有限幂零群进行了完全分类.%The finite nilpotent groups with 5 conjugacy classes of noncyclic subgroups are completely classified, from which one can give the structure of all finite nilpotent groups with the number of conjugacy classes of noncyclic subgroups at most 5.

  20. "Racializing" Class

    Science.gov (United States)

    Hatt-Echeverria, Beth; Urrieta, Luis, Jr.

    2003-01-01

    In an effort to explore how racial and class oppressions intersect, the authors use their autobiographical narratives to depict cultural and experiential continuity and discontinuity in growing up white working class versus Chicano working class. They specifically focus on "racializing class" due to the ways class is often used as a copout by…

  1. 高校班级团体辅导中集体心理的转型与共振%The Transition and Resonance of Collective Psychology in University Class Group Counseling

    Institute of Scientific and Technical Information of China (English)

    吴玉兰

    2016-01-01

    The class group counseling regards the class as the group situation, optimize class dynamic and op-timize interactive way and urge individuals to adjust and correct their thoughts and feelings, eventually, it o-vercomes the binary class psychological structure which is the fragmentation between individual and collective psychological and the the cohesion of psychological structure to promote personal development and class collec-tive goals’ realizing. So constructing the interaction between counselors and students, breaking the rigid class structure, integrating different fields in the context of habits, reducing conflict of the collective psychological, shaping rules of class group counseling and avoiding the reverse evolution in the condition of collective psycho-logical are necessary.%高校班级团体辅导以班级为团体情境,优化班级互动方式,促使班级个体在情感和思维上持续调整、修正,从而克服班级二元性心理结构,即个体与集体的心理割裂,塑成一体性心理结构,促进学生个性发展和班级集体目标的共同实现。因此,需要构建优化辅导员与学生及学生之间的互动关系,打破僵化的班集体心理结构;整合不同场域背景下的惯习,降低班集体心理冲突;塑成班级团体辅导规则,避免集体心理条件下的反向演进。

  2. Exploration on the Application of Group Psychological Counseling to Class Construction for Freshmen%团体心理辅导在大学新生班级建设中的应用探析

    Institute of Scientific and Technical Information of China (English)

    刘丹

    2016-01-01

    Currently, the use of group psychological counseling is conducive to the improvement of university student management, as it can promote class management for freshmen and provide a good learning atmosphere for them. Based on the status quo of class construction for freshmen, this paper analyzes the measures to apply group psychological counseling to class management for freshmen.%当前,利用团体心理辅导做好大学生新生班级建设工作,给大学新生创造良好的学习氛围,有利于高校学生管理水平的提升。文章立足于大学新生班级建设现状,主要分析了“团体心理辅导在大学新生班级建设中的应用措施”。

  3. On the Role of Group Psychological Guidance in Promot-ing College Freshmen's Class Learning Style%团体心理辅导对高校新生班级学风的促进作用

    Institute of Scientific and Technical Information of China (English)

    霍中开

    2016-01-01

    为了探索团体心理辅导对大学新生班级学习氛围与人际氛围的影响作用,本研究通过以班级学风为主题的团体心理辅导,对174名大一新生以班级为单位进行为期三周的实验研究,实验结束后采用自编《班级学习氛围》问卷作为评估指标对实验组与对照组进行比较分析。分析结果发现,实验组班级氛围总分、找到共同学习目标的朋友、时间管理、自发学习活动、专业认识和人际氛围题项的得分高于对照组,且差异具有统计学意义(p<0.05)。统计结果显示,短期的团体心理辅导活动对新生班级学习氛围和人际氛围具有促进作用,文章并进一步就团体辅导对高校新生班级的适用性进行了讨论。%To explore the influence of group psychological guid-ance on college freshmen's class learning atmosphere and inter-personal relationship, this paper, through the group psychological guidance themed by class learning style, carried out a three-week experimental research on 174 college freshmen with class as the unit, and then used the self-made questionnaire of"class learn-ing atmosphere"as the evaluation standard to compare and ana-lyze the experimental group and the control group. It was found in the analysis results that the total score in class atmosphere, the scores in making friends with those who have the same learning objectives, time management, autonomous learning activities, professional understanding and interpersonal relationship of the experimental group are higher than those of the control group, and the difference is of statistical significance ( <0.05). It was indicated in the statistical results that short-term group psycho-logical guidance can promote college freshmen's class learning atmosphere and inter personal relationship. This paper then dis-cussed the adaptability of group guidance in college freshmen's class.

  4. Single-Cell Genome and Group-Specific dsrAB Sequencing Implicate Marine Members of the Class Dehalococcoidia (Phylum Chloroflexi) in Sulfur Cycling

    DEFF Research Database (Denmark)

    Wasmund, Kenneth; Cooper, Myriel; Schreiber, Lars;

    2016-01-01

    The marine subsurface sediment biosphere is widely inhabited by bacteria affiliated with the class Dehalococcoidia (DEH), phylum Chloroflexi, and yet little is known regarding their metabolisms. In this report, genomic content from a single DEH cell (DEH-C11) with a 16S rRNA gene that was affilia......The marine subsurface sediment biosphere is widely inhabited by bacteria affiliated with the class Dehalococcoidia (DEH), phylum Chloroflexi, and yet little is known regarding their metabolisms. In this report, genomic content from a single DEH cell (DEH-C11) with a 16S rRNA gene...... subsurface DEH....

  5. Dependent Classes

    DEFF Research Database (Denmark)

    Gasiunas, Vaidas; Mezini, Mira; Ostermann, Klaus

    2007-01-01

    Virtual classes allow nested classes to be refined in subclasses. In this way nested classes can be seen as dependent abstractions of the objects of the enclosing classes. Expressing dependency via nesting, however, has two limitations: Abstractions that depend on more than one object cannot...... be modeled and a class must know all classes that depend on its objects. This paper presents dependent classes, a generalization of virtual classes that expresses similar semantics by parameterization rather than by nesting. This increases expressivity of class variations as well as the flexibility...... of their modularization. Besides, dependent classes complement multi-methods in scenarios where multi-dispatched abstractions rather than multi-dispatched method are needed. They can also be used to express more precise signatures of multi-methods and even extend their dispatch semantics. We present a formal semantics...

  6. First report on class 1 integrons and Trimethoprim-resistance genes from dfrA group in uropathogenic E. coli (UPEC) from the Aleppo area in Syria.

    Science.gov (United States)

    Al-Assil, Bodour; Mahfoud, Maysa; Hamzeh, Abdul Rezzak

    2013-05-01

    Horizontal gene transfer (HGT) introduces advantageous genetic elements into pathogenic bacteria using tools such as class1 integrons. This study aimed at investigating the distribution of these integrons among uropathogenic E. coli (UPEC) isolated from patients in Aleppo, Syria. It also set to uncover the frequencies of the clinically relevant DfrA1 and DfrA17,7, as well as various associations leading to reduced susceptibility. This study involved 75 Trimethoprim-resistant E. coli isolates from in- and outpatients with urinary tract infections (UTIs) from 3 major hospitals in Aleppo. Bacterial identification, resistance and extended-spectrum-β-lactamase (ESBL) production testing were performed according to Clinical Laboratory Standards Institute guidelines. Detection of integrons and DfrA genes was done using PCR and statistical significance was inferred through χ2 (Fisher's) test. Class1 integrons were detected in 54.6% of isolates while DfrA1 and DfrA17,7 were found in 16% and 70.6% of tested samples respectively. Furthermore, only DfrA17,7 were strongly associated with class1 integrons, as were reduced susceptibility to the majority of individual antibiotics, multidrug resistance and ESBL production. This study demonstrated the high prevalence of class1 integrons among UPEC strains in Aleppo, Syria, as well as their significant associations with MDR. This data give information for local healthcare provision using antibiotic chemotherapy.

  7. Effects of an integrated geriatric group balance class within an entry-level Doctorate of Physical Therapy program on students' perceptions of geriatrics and geriatric education in the United States.

    Science.gov (United States)

    Reneker, Jennifer C; Weems, Kyra; Scaia, Vincent

    2016-01-01

    This study was aimed at determining the effect of an integrated group balance class for community-dwelling older adults within entry-level physical therapist coursework on student perceptions of geriatric physical therapy and geriatric physical therapy education. Twenty-nine Doctor of Physical Therapy (DPT) students, 21-33 years old, in their second year of coursework in 2012, participated in an integrated clinical experience with exposure to geriatric patients at an outpatient facility at the Louis Stokes Cleveland Department of Veterans Affairs Medical Center in Akron, Ohio, USA. Student perceptions were collected before and after participation in the 8-week balance class. The Wilcoxon sign-ranked test was used to identify differences in perceptions after participation in the group balance class. Cohen's d values were calculated to measure the size of the pre-participation to post-participation effect for each measure. At the conclusion of the group class, the DPT students demonstrated an increase in positive perceptions of geriatric physical therapy in 8 measures, with small effect sizes (d=0.15-0.30). Two perceptions of geriatric physical therapy demonstrated a significant positive increase (Pgeriatric education in the curriculum demonstrated a large positive effect for quality (d=1.68) and enjoyment (d=1.96). Positive changes were found in most of the perceptions of geriatrics and geriatric education after participation, suggesting that integrated clinical experiences with geriatric patients are an effective way to positively influence perceptions of physical therapist practice with older adults.

  8. Application of Group Counseling in Freshman Class Management in Higher Vocational College%团体心理辅导在高职新生班级管理中的应用

    Institute of Scientific and Technical Information of China (English)

    陶大伟

    2011-01-01

    团体心理辅导是一种利用团体的力量来帮助个体成长的心理辅导技巧,强调亲身体验和感受.在高职新生班级管理中应用团体心理辅导,有助于民主型师生关系的建立,有助于班级凝聚力的形成,有助于帮助学生解除适应不良现象.%Group counseling is a psychological counseling skill to help the individual growth with group's strength, emphasizing personal experience and feeling. The application of group counseling in freshman class management in higher vocational college will contribute to the establishment of democratic relationship between teachers and students, the formation of class cohesion and relieve students' maladjustment phenomenon.

  9. Emphasizing class-based policies can help civil society to mobilize women, the elderly, and ethnic and minority groups in the US election

    OpenAIRE

    Navarro,Vicente

    2016-01-01

    The 2016 election cycle has been marked by a populist rebellion against Washington by the supporters of Donald Trump, and the billionaire class by those who follow Senator Bernie Sanders. Vicente Navarro writes on the election with a European view, and investigates why women’s and African American organizations are supporting Hillary Clinton rather than Sanders, given that they would benefit more from Sanders’ policy program. He explains that such organizations tend to focus on race, gender, ...

  10. The bourgeoisie framed: Mafalda and its group criticize elements of the bourgeois society (the naturalization of the differences, the inhumanuzation and the competition in the History class

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Rebuá Oliveira

    2012-08-01

    Full Text Available The purpose of this work, from a marxist point of view, is to think about the possibility in criticizing the bourgeosie society in History classes, to set up colectively, at last, anti-hegemonic reality readings. Based upon Gramsci concept of hegemony and on anti-hegemony notion, we have analyzed the comics not with the intention of making this language more and more present in the classes but with the attempt of understanding them as a tool that may contribute a lot for a real criticism and for the explicitness of the historic moment in which they were created, for a teaching, at the same time, more playful and critic. In methodological terms, we have selected three Mafalda’s strips (named “The naturalization of the differences”, “The inhumanization” and “The competition”, shown on Toda Mafalda (2002 aiming to replace the insights herein sketched. This work is a part of the master’s degree lecture, read  at the Postgraduation Program in Education of UERJ (ProPed in March 2011, under the title of Mafalda in The History class: a criticism of the bourgeoise society charactheristic elements and the collective making-up of hegemonic meanings.

  11. 班级团体辅导对改善高职生人际关系的应用研究%Research on the Application of Class Group Counseling to Improve the Interpersonal Relationship of Higher Vocational Students

    Institute of Scientific and Technical Information of China (English)

    郭敏慧; 邓剑虹; 原兰兰

    2015-01-01

    In order to explore the influence of class group counseling on interpersonal communication of vo⁃cational college students, the research selected the sophomores from two different classes in the same major as the research random samples, of which one was enrolled as the experimental group to receive the class group counseling on interpersonal communication six times, the other as the control group without any intervention. The experimental group showed significant differences on College Students ’Interpersonal Comprehensive Diag⁃nostic Scale and Social Avoidance and Distress Scale after the measurement(p<0.05,p<0.001), while the con⁃trol group had no change;The experimental group and control group showed no significant differences before the measurement, but there were significant differences after the measurement(p<0.05,p<0.001). The experimental group presented more satisfaction on group effect. Therefore, the research gets the conclusion that class group counseling can improve the interpersonal communication of college students.%目的:探讨班级团体辅导对改善高职生人际关系的效果。方法:随机抽取某校大二年级同专业两个班学生,其中一个班作为实验组参加6次人际关系团体心理辅导,另一班作为对照组不做任何干预。采用前后测量表评估法和主观评估法检验班级团体辅导效果。结果:实验组在大学生人际关系综合诊断量表(CSICD)和社交回避与苦恼量表(SAD)的前后测比较中,均表现出显著差异(p<0.05,p<0.001),对照组无显著差异;在两量表前测中实验组与对照组均无显著差异,后测中均表现出显著差异(p<0.05,p<0.001)。实验组对团体效果满意度呈现上升趋势。结论:班级团体辅导对改善高职生人际关系具有促进作用。

  12. Birthing Classes

    Science.gov (United States)

    ... first birth and hope to have a vaginal delivery this time, there is a class for that, too. Choose ... t covered in your birthing class, it’s a good idea to take an individual class on it, especially if you are a first-time mother. The health benefits of breastfeeding your baby ...

  13. The Construction of Group Type Cooperative Learning in High School English Class%小组式合作学习在高中英语课堂的构建

    Institute of Scientific and Technical Information of China (English)

    王亚飞

    2011-01-01

    通过分析小组式合作学习的理论基础以及将其引进高中英语课堂中的现实意义,介绍小组式合作学习在课堂中的多种表现形式,并且从实际的教学情境出发,论述了小组式合作学习在高中英语的听力、口语、阅读、写作教学中的具体应用。%By means of analyse of the group type cooperative learning theoretical basis and the realistic significance of the group type cooperative learning which brought into the high school English class. Introducing the Different fomls of the group type cooperative learning and set out from the actual teaching situation, discussed how the group type cooperative learning applied in listening,spoken English,reading,writing class in high school.

  14. Automorphism Group of a Class of Heisenberg n-Lie Algebras%一类Heisenberg n-李代数的自同构群

    Institute of Scientific and Technical Information of China (English)

    白瑞蒲; 刘丽丽

    2011-01-01

    本文主要研究Heisenberg n-李代数的结构.给出了一类(3m+1)-维Heisenberg 3-李代数及(nm+1)-维Heisenberg n-李代数的自同构群.且给出了自同构的具体表达式.%This paper mainly concerns Heisenberg n-Lie algebras. The structure of automorphism groups of (3m+1)-dimensional Heisenberg 3-Lie algebras is determined. The automorphism groups of (mn+1)-dimensional Heisenberg n-Lie algebras are studied; the concrete expression of every automorphism is given.

  15. Stabilizing and Destabilizing the "Ideal" Teacher in a Rural Teacher Book Group: Protective Guide, Moral Exemplar, and Purveyor of Middle Class Values

    Science.gov (United States)

    Ketter, Jean; Lewis, Cynthia

    2015-01-01

    This research is an ethnographic case study of a book group focusing on the reading and teaching of multicultural literature in a rural, predominately white, middle school setting. We examine how participants co-constructed teacher identities through the parallel narratives they created about themselves and their students. We discovered that the…

  16. Comparative genomic analysis of Pseudomonas aeruginosa phage PaMx25 reveals a novel siphovirus group related to phages infecting hosts of different taxonomic classes.

    Science.gov (United States)

    Flores, Víctor; Sepúlveda-Robles, Omar; Cazares, Adrián; Kameyama, Luis; Guarneros, Gabriel

    2017-08-01

    Bacteriophages (phages) are estimated to be the most abundant and diverse entities in the biosphere harboring vast amounts of novel genetic information. Despite the genetic diversity observed, many phages share common features, such as virion morphology, genome size and organization, and can readily be associated with clearly defined phage groups. However, other phages display unique genomes or, alternatively, mosaic genomes composed of regions that share homology with those of phages of diverse origins; thus, their relationships cannot be easily assessed. In this work, we present a functional and comparative genomic analysis of Pseudomonas aeruginosa phage PaMx25, a virulent member of the Siphoviridae family. The genomes of PaMx25 and a highly homologous phage NP1, bore sequence homology and synteny with the genomes of phages that infect hosts different than Pseudomonas. In order to understand the relationship of the PaMx25 genome with that of other phages, we employed several computational approaches. We found that PaMx25 and NP1 effectively bridged several phage groups. It is expected that as more phage genomes become available, more gaps will be filled, blurring the boundaries that currently separate phage groups.

  17. Team Learning in Large Classes.

    Science.gov (United States)

    Roueche, Suanne D., Ed.

    1984-01-01

    Information and suggestions are provided on the use of team learning in large college classes. Introductory material discusses the negative cycle of student-teacher interaction that may be provoked by large classes, and the use of permanent, heterogeneous, six- or seven-member student learning groups as the central focus of class activity as a…

  18. Communication, "Class," and Culture.

    Science.gov (United States)

    Jeffres, Leo W.

    A study was conducted to examine the relationships among communication, social class, and ethnic heritage. Eleven of thirteen ethnic groups in a Midwestern metropolitan area who had been studied in 1976 were surveyed again in late 1980 and early 1981. Groups surveyed were Irish, Greek, Czech, Italian, Lebanese, Hungarian, Lithuanian, Polish,…

  19. Individu-jeune, élève du groupe classe et appartenances sociales : construction d'inégalités scolaires entre acculturation, brouillage et résistance

    OpenAIRE

    Bonnéry, Stéphane

    2004-01-01

    Nos recherches montrent que les malentendus sur l'objet des apprentissages scolaires, touchant surtout les milieux populaires, peuvent se doubler de modes d'inscription inadaptés (pour se construire en tant qu'élève et s'acculturer) dans le groupe classe, dans la scolarité. Cette inscription est alors celle d'un individu dans des collectifs (juvénile, ethnicisé...) excluant la possibilité d'acculturation car n'étant pas rapportés aux rapports sociaux objectifs qui définissent ces collectifs. ...

  20. Drawing on Elements of Group Counseling to Improve the Effectiveness of Higher Vocational Class Construction%借鉴团体心理辅导元素 提高高职班级建设成效

    Institute of Scientific and Technical Information of China (English)

    尹秋云

    2011-01-01

    班级是高职院校对学生实施管理的基本单位,高职班级建设的成效直接影响高职院校教育措施的落实,对高职学生发展也有着重要的影响作用。在高职班级建设中,借鉴团体心理辅导对高职班级建设的有益元素,可有效突破高职班级建设中理念与方法的局限,提高高职班级建设成效,促进高职班级教育功能的强化。%The class is the basic unit of the implementation of the management in higher vocational colleges.The effectiveness of the class construction directly influences the implementation of measures of higher vocational education,and the development of vocational students.Referencing beneficial elements of group counseling can effectively break through the limitations of ideas and methods in the construction of higher vocational classes,and promote the construction effect and strengthening the function of education

  1. Word classes

    DEFF Research Database (Denmark)

    Rijkhoff, Jan

    2007-01-01

    This article provides an overview of recent literature and research on word classes, focusing in particular on typological approaches to word classification. The cross-linguistic classification of word class systems (or parts-of-speech systems) presented in this article is based on statements found...... a parts-of-speech system that includes the categories Verb, Noun, Adjective and Adverb, other languages may use only a subset of these four lexical categories. Furthermore, quite a few languages have a major word class whose members cannot be classified in terms of the categories Verb – Noun – Adjective...

  2. Class II Microcins

    Science.gov (United States)

    Vassiliadis, Gaëlle; Destoumieux-Garzón, Delphine; Peduzzi, Jean

    Class II microcins are 4.9- to 8.9-kDa polypeptides produced by and active against enterobacteria. They are classified into two subfamilies according to their structure and their gene cluster arrangement. While class IIa microcins undergo no posttranslational modification, class IIb microcins show a conserved C-terminal sequence that carries a salmochelin-like siderophore motif as a posttranslational modification. Aside from this C-terminal end, which is the signature of class IIb microcins, some sequence similarities can be observed within and between class II subclasses, suggesting the existence of common ancestors. Their mechanisms of action are still under investigation, but several class II microcins use inner membrane proteins as cellular targets, and some of them are membrane-active. Like group B colicins, many, if not all, class II microcins are TonB- and energy-dependent and use catecholate siderophore receptors for recognition/­translocation across the outer membrane. In that context, class IIb microcins are considered to have developed molecular mimicry to increase their affinity for their outer membrane receptors through their salmochelin-like posttranslational modification.

  3. In silico modification of Zn2+ binding group of suberoylanilide hydroxamic acid (SAHA) by organoselenium compounds as Homo sapiens class II HDAC inhibitor of cervical cancer

    Science.gov (United States)

    Sumo Friend Tambunan, Usman; Bakri, Ridla; Aditya Parikesit, Arli; Ariyani, Titin; Dyah Puspitasari, Ratih; Kerami, Djati

    2016-02-01

    Cervical cancer is the most common cancer in women, and ranks seventh of all cancers worldwide, with 529000 cases in 2008 and more than 85% cases occur in developing countries. One way to treat this cancer is through the inhibition of HDAC enzymes which play a strategic role in the regulation of gene expression. Suberoyl Anilide Hydroxamic Acid (SAHA) or Vorinostat is a drug which commercially available to treat the cancer, but still has some side effects. This research present in silico SAHA modification in Zinc Binding Group (ZBG) by organoselenium compound to get ligands which less side effect. From molecular docking simulation, and interaction analysis, there are five best ligands, namely CC27, HA27, HB28, IB25, and KA7. These five ligands have better binding affinity than the standards, and also have interaction with Zn2+ cofactor of inhibited HDAC enzymes. This research is expected to produce more potent HDAC inhibitor as novel drug for cervical cancer treatment.

  4. Genetic Variations in the Human G Protein-coupled Receptor Class C, Group 6, Member A (GPRC6A) Control Cell Surface Expression and Function

    DEFF Research Database (Denmark)

    Jorgensen, Stine; Have, Christian Theil; Underwood, Christina Rye

    2017-01-01

    -expressed and functional. By analyses of chimeric human/mouse and human/bonobo receptors, bonobo receptor mutants, and the single nucleotide polymorphism database at NCBI, we identify an insertion/deletion variation in the third intracellular loop responsible for the intracellular retention and lack of function...... of the human ortholog. Genetic analyses of the 1000 genome database and the Inter99 cohort of 6,000 Danes establish the distribution of genotypes among ethnic groups, showing that the cell surface-expressed and functional variant is much more prevalent in the African population than in European and Asian...... populations and that this variant is partly linked with a stop codon early in the receptor sequence (rs6907580, amino acid position 57). In conclusion, our data solve a more than decade-old question of why the cloned human GPRC6A receptor is not cell surface-expressed and functional and provide a genetic...

  5. Class size versus class composition

    DEFF Research Database (Denmark)

    Jones, Sam

    Raising schooling quality in low-income countries is a pressing challenge. Substantial research has considered the impact of cutting class sizes on skills acquisition. Considerably less attention has been given to the extent to which peer effects, which refer to class composition, also may affect...... bias from omitted variables, the preferred IV results indicate considerable negative effects due to larger class sizes and larger numbers of overage-for-grade peers. The latter, driven by the highly prevalent practices of grade repetition and academic redshirting, should be considered an important...

  6. Genetic Variations in the Human G Protein-coupled Receptor Class C, Group 6, Member A (GPRC6A) Control Cell Surface Expression and Function.

    Science.gov (United States)

    Jørgensen, Stine; Have, Christian Theil; Underwood, Christina Rye; Johansen, Lars Dan; Wellendorph, Petrine; Gjesing, Anette Prior; Jørgensen, Christinna V; Quan, Shi; Rui, Gao; Inoue, Asuka; Linneberg, Allan; Grarup, Niels; Jun, Wang; Pedersen, Oluf; Hansen, Torben; Bräuner-Osborne, Hans

    2017-01-27

    GPRC6A is a G protein-coupled receptor activated by l-amino acids, which, based on analyses of knock-out mice, has been suggested to have physiological functions in metabolism and testicular function. The human ortholog is, however, mostly retained intracellularly in contrast to the cell surface-expressed murine and goldfish orthologs. The latter orthologs are Gq-coupled and lead to intracellular accumulation of inositol phosphates and calcium release. In the present study we cloned the bonobo chimpanzee GPRC6A receptor, which is 99% identical to the human receptor, and show that it is cell surface-expressed and functional. By analyses of chimeric human/mouse and human/bonobo receptors, bonobo receptor mutants, and the single nucleotide polymorphism database at NCBI, we identify an insertion/deletion variation in the third intracellular loop responsible for the intracellular retention and lack of function of the human ortholog. Genetic analyses of the 1000 genome database and the Inter99 cohort of 6,000 Danes establish the distribution of genotypes among ethnic groups, showing that the cell surface-expressed and functional variant is much more prevalent in the African population than in European and Asian populations and that this variant is partly linked with a stop codon early in the receptor sequence (rs6907580, amino acid position 57). In conclusion, our data solve a more than decade-old question of why the cloned human GPRC6A receptor is not cell surface-expressed and functional and provide a genetic framework to study human phenotypic traits in large genome sequencing projects linked with physiological measurement and biomarkers.

  7. Application of Small Groups Activities in Multimedia English Class Through Natural Approach%自然法指导下的小组活动在多媒体教学中的应用

    Institute of Scientific and Technical Information of China (English)

    杨轶殊

    2015-01-01

    In modern college English class,large class is a major challenge for college English teaching.Therefore,we need a theo-ry to effectively guide the College English Teaching.On the basis of natural approach proposed by Krashen and Terrel in 1983,combined with the theory of group activities,this paper puts forward the theory and methods to guide college English teaching,and further promotes the communication in the classroom.%在现代大学英语课堂上,大班教学是大学英语教学面临的主要挑战.因此,需要一个可以有效指导大学英语教学的理论.该文以Krashen和Terrel在1983年提出的自然教学法对小组活动的理论为依据,提出了指导大学英语教学的理论和实施方法,进一步地促进了课堂上的交际.

  8. Class size versus class composition

    DEFF Research Database (Denmark)

    Jones, Sam

    Raising schooling quality in low-income countries is a pressing challenge. Substantial research has considered the impact of cutting class sizes on skills acquisition. Considerably less attention has been given to the extent to which peer effects, which refer to class composition, also may affect...... outcomes. This study uses new microdata from East Africa, incorporating test score data for over 250,000 children, to compare the likely efficacy of these two types of interventions. Endogeneity bias is addressed via fixed effects and instrumental variables techniques. Although these may not fully mitigate...

  9. Explosive Technology Group

    Data.gov (United States)

    Federal Laboratory Consortium — The Explosive Technology Group (ETG) provides diverse technical expertise and an agile, integrated approach to solve complex challenges for all classes of energetic...

  10. The braid structure of mapping class groups

    OpenAIRE

    Fiedorowicz, Zbigniew; Song, Yongjin

    1997-01-01

    Surgery and Geometric Topology : Proceedings of the conference held at Josai University 17-20 September, 1996 / edited by Andrew Ranicki and Masayuki Yamasaki. 本文データは許諾を得てeditorのHPサイトhttp://surgery.matrix.jp/math/josai96/proceedings.html から複製再利用したものである。

  11. Exploring the Application of Group Counseling in Freshmen Class Culture Construction%班级团体辅导在大学新生班级建设中的探索与实践

    Institute of Scientific and Technical Information of China (English)

    陈瑞雯

    2015-01-01

    Freshmen don't easily fit into college life and are usually faced with different kinds of discomforts , difficulties and frustrations .Based on years of experience and exploration ,this paper suggests that group coun-seling is an effective method to solve their psychological problems ,improve their learning ability and communi-cational skills,enhance and boost development of class culture .%大学新生进校后会表现出各方面的不适应,经过多年的探索与实践发现:班级团体辅导在改善新生心理状况、提升学习能力及人际交往能力、增强班级凝聚力、促进班级建设等方面能够起到非常良好的效果.

  12. IQ and Social Class.

    Science.gov (United States)

    Fischbein, Siv

    1980-01-01

    Swedish longitudinal studies of twins support Scarr-Salapatek's explanation of nature-nurture influences on intelligence. This model predicts more genetic variance in test results for advantaged than disadvantaged groups. Jensen's work, however, suggests equal amounts of variance among different social classes. (Author/CP)

  13. Resonance classes of measures

    Directory of Open Access Journals (Sweden)

    Maria Torres De Squire

    1987-01-01

    Full Text Available We extend F. Holland's definition of the space of resonant classes of functions, on the real line, to the space R(Φpq (1≦p, q≦∞ of resonant classes of measures, on locally compact abelian groups. We characterize this space in terms of transformable measures and establish a realatlonship between R(Φpq and the set of positive definite functions for amalgam spaces. As a consequence we answer the conjecture posed by L. Argabright and J. Gil de Lamadrid in their work on Fourier analysis of unbounded measures.

  14. BUSN 460 Complete Class

    OpenAIRE

    Laynebaril1

    2017-01-01

    BUSN 460 Complete Class Click Link Below To Buy:   http://hwcampus.com/shop/busn-460-complete-class/     Week 1 DQ 1 Selling your team’s services to CanGo  Week 1 DQ 2 Mission, Vision & Values  Week 2 DQ 1 Planning a Technological Solution  Week 2 DQ 2 Cost Benefit Analysis  Week 3 DQ 1 Flow Charting Processes  Week 3 DQ 2 Implementing Technology  Week 4 DQ 1 Group vs Team  Week  4 DQ 2 Matrixed Employee Environments  Week 5 DQ 1 Pe...

  15. Groups possessing extensive hierarchical decompositions

    CERN Document Server

    Januszkiewicz, T; Leary, I J

    2009-01-01

    Kropholler's class of groups is the smallest class of groups which contains all finite groups and is closed under the following operator: whenever $G$ admits a finite-dimensional contractible $G$-CW-complex in which all stabilizer groups are in the class, then $G$ is itself in the class. Kropholler's class admits a hierarchical structure, i.e., a natural filtration indexed by the ordinals. For example, stage 0 of the hierarchy is the class of all finite groups, and stage 1 contains all groups of finite virtual cohomological dimension. We show that for each countable ordinal $\\alpha$, there is a countable group that is in Kropholler's class which does not appear until the $\\alpha+1$st stage of the hierarchy. Previously this was known only for $\\alpha= 0$, 1 and 2. The groups that we construct contain torsion. We also review the construction of a torsion-free group that lies in the third stage of the hierarchy.

  16. Abelian groups

    CERN Document Server

    Fuchs, László

    2015-01-01

    Written by one of the subject’s foremost experts, this book focuses on the central developments and modern methods of the advanced theory of abelian groups, while remaining accessible, as an introduction and reference, to the non-specialist. It provides a coherent source for results scattered throughout the research literature with lots of new proofs. The presentation highlights major trends that have radically changed the modern character of the subject, in particular, the use of homological methods in the structure theory of various classes of abelian groups, and the use of advanced set-theoretical methods in the study of undecidability problems. The treatment of the latter trend includes Shelah’s seminal work on the undecidability in ZFC of Whitehead’s Problem; while the treatment of the former trend includes an extensive (but non-exhaustive) study of p-groups, torsion-free groups, mixed groups, and important classes of groups arising from ring theory. To prepare the reader to tackle these topics, th...

  17. Class distinction

    Science.gov (United States)

    White, M. Catherine

    Typical 101 courses discourage many students from pursuing higher level science and math courses. Introductory classes in science and math serve largely as a filter, screening out all but the most promising students, and leaving the majority of college graduates—including most prospective teachers—with little understanding of how science works, according to a study conducted for the National Science Foundation. Because few teachers, particularly at the elementary level, experience any collegiate science teaching that stresses skills of inquiry and investigation, they simply never learn to use those methods in their teaching, the report states.

  18. Condylar volume and condylar area in class I, class II and class III young adult subjects

    OpenAIRE

    Saccucci Matteo; D’Attilio Michele; Rodolfino Daria; Festa Felice; Polimeni Antonella; Tecco Simona

    2012-01-01

    Abstract Aim Aim of this study was to compare the volume and the shape of mandibular condyles in a Caucasian young adult population, with different skeletal pattern. Material and methods 200 Caucasian patients (15–30 years old, 95 male and 105 females) were classified in three groups on the base of ANB angle: skeletal class I (65 patients), skeletal class II (70 patients) and skeletal class III (65 patients). Left and right TMJs of each subject were evaluated independently with CBCT (Iluma). ...

  19. Student Engagement and Marketing Classes

    Science.gov (United States)

    Taylor, Steven A.; Hunter, Gary L.; Melton, Horace; Goodwin, Stephen A.

    2011-01-01

    A study is reported that investigates the goals underlying undergraduate students' engagement in their major classes, nonmajor classes, and in extracurricular activities. The qualitative study employs both focus groups and goal-mapping exercises. The results suggest that students tend to focus on utilitarian, attribute-level considerations mainly…

  20. Application of Group Learning in Large Class Teaching of Chemical Reaction Engineering%小组学习在《化学反应工程》大班教学中的应用

    Institute of Scientific and Technical Information of China (English)

    张艳维; 张楠; 张长松; 赵凌; 李保利

    2015-01-01

    Based on the teaching process of Chemical Reaction Engineering, the implementation background of the group learning mode in large class teaching was discussed and its running status, final effects and causes were analyzed. Survey results showed that only 25% of students got the harvest from the group learning mode.It was mainly because teachers just assign, but not participate in.So supervision and control was missing in the learning process.In addition, initiative was not enough for some students.To advance the effect, teachers must prepare carefully, track the whole learning process and mobilize the enthusiasm of the students.%以《化学反应工程》课程为例,论述了小组合作学习在大班教学中的实施背景、实施情况,考查实施结果以及分析其原因。调查结果表明,此次小组教学模式只有25%的同学有收获。这主要是因为教师只布置任务,没有参与其中,缺乏学习过程监督与管理所致。另外,个别学生学习主动性不够也是原因之一。所以在今后的小组合作学习模式教学过程中,教师不仅要精心准备任务,还要全程跟踪,调动学生的学习积极性。

  1. On the Central Automorphism Groups of Finite p-Groups

    Institute of Scientific and Technical Information of China (English)

    Ali-Reza Jamali; Hamid Mousavi

    2002-01-01

    Using the concept of isoclinism, we study closely the center of the group Autc(G) of central automorphisms for a certain class of finite p-groups G.We also give some necessary and sufficient conditions on a finite purely non-abelian p-group G of class 2 (p odd) for the group Autc(G) to be elementary abelian.

  2. Grouping and Achievement in Cooperative Learning

    Science.gov (United States)

    Baer, John

    2003-01-01

    Colleges typically group students homogeneously in classes by means of both admission requirements and course prerequisites, but when professors form cooperative learning groups within classes they generally use heterogeneous grouping. Authors compared heterogeneously and homogeneously grouped cooperative learning groups in six paired classes,…

  3. Groups with reality and conjugacy conditions

    Directory of Open Access Journals (Sweden)

    Patrizia Longobardi

    2012-06-01

    Full Text Available Many results were proved on the structure of finite groups with some restrictions on their real elements and on their conjugacy classes. We generalize a few of these to some classes of infinite groups. We study groups in which real elements are central, groups in which real elements are 2-elements, groups in which all non-trivial classes have the same finite size and FC-groups with two non-trivial conjugacy class sizes.

  4. Flipping Quantitative Classes: A Triple Win

    Science.gov (United States)

    Swart, William; Wuensch, Karl L.

    2016-01-01

    In the "flipped" class, students use online materials to learn what is traditionally learned by attending lectures, and class time is used for interactive group learning. A required quantitative business class was taught as a flipped classroom in an attempt to improve student satisfaction in the course and reduce the "transactional…

  5. Consumo e desempenho de animais alimentados individualmente ou em grupo e características de carcaça de animais Nelore de três classes sexuais Performance of animals fed individually or in groups and carcass traits of Nellore cattle from three sexual classes

    Directory of Open Access Journals (Sweden)

    Marcos Inácio Marcondes

    2008-12-01

    Full Text Available Esta pesquisa foi realizada com os objetivos de estimar os consumos individuais de matéria seca, concentrado e volumoso de bovinos alimentados em grupo, avaliar o consumo de matéria seca (CMS, o ganho médio diário (GMD e a conversão alimentar (CA de bovinos de três classes sexuais (machos não-castrados, machos castrados e fêmeas alimentados individualmente ou em grupo, com dois níveis de oferta de concentrado (OC (1,00 ou 1,25% do peso vivo, e analisar as características de carcaça de animais Nelore terminados em confinamento. Utilizaram-se 45 bovinos Nelore - 15 machos castrados (MC, 15 machos não-castrados (MNC e 15 fêmeas (FE. Desses animais, nove (três de cada classe foram abatidos no início do experimento e serviram como referência nas avaliações. Os animais restantes (36 foram distribuídos em dois esquemas de alimentação (EA e alimentados, individualmente ou em grupo, com dois níveis de concentrado, perfazendo um esquema fatorial 2 × 2 × 3. Nas avaliações, utilizaram-se a LIPE® para estimativa da produção fecal; o óxido crômico e o dióxido de titânio para determinação do consumo de concentrado; e a FDNi e FDAi para estimativa do consumo de volumoso. Ao final do experimento, todos os animais alimentados individualmente foram abatidos para avaliação das carcaças e dos rendimentos de cortes. O esquema de alimentação não influenciou o consumo de matéria seca nem o ganho médio diário dos animais. Ofertas de 1,00 ou 1,25% do PV em concentrado não influenciaram o rendimento e as principais características de carcaça. Machos Nelore não-castrados ganham 24% a mais de peso que machos castrados, que, por sua vez, ganham 22% a mais que as fêmeas. Entre as classes sexuais, machos não-castrados são mais eficientes que os castrados e as fêmeas na deposição de carne e apresentam maiores rendimentos de alguns cortes básicos.The present work aimed to estimate the individual intake of dry matter

  6. Homogeneous products of conjugacy classes

    OpenAIRE

    Adan-Bante, Edith

    2006-01-01

    Let $G$ be a finite group and $a\\in G$. Let $a^G=\\{g^{-1}ag\\mid g\\in G\\}$ be the conjugacy class of $a$ in $G$. Assume that $a^G$ and $b^G$ are conjugacy classes of $G$ with the property that ${\\bf C}_G(a)={\\bf C}_G(b)$. Then $a^G b^G$ is a conjugacy class if and only if $[a,G]=[b,G]=[ab,G]$ and $[ab,G]$ is a normal subgroup of $G$.

  7. Group I intron ribozymes

    DEFF Research Database (Denmark)

    Nielsen, Henrik

    2012-01-01

    Group I intron ribozymes constitute one of the main classes of ribozymes and have been a particularly important model in the discovery of key concepts in RNA biology as well as in the development of new methods. Compared to other ribozyme classes, group I intron ribozymes display considerable......, the intronic products of these pathways have the potential to integrate into targets and to form various types of circular RNA molecules. Thus, group I intron ribozymes and associated elements found within group I introns is a rich source of biological phenomena. This chapter provides a strategy and protocols...... for initial characterization of new group I intron ribozymes....

  8. Language and Group Identity.

    Science.gov (United States)

    Milroy, Leslie

    1982-01-01

    Explores the tension between the manner in which intergroup language differences are used to symbolize group membership and the manner in which they mirror and reinforce social class and power distinctions. (EKN)

  9. Fibonacci Lengths of Certain Nilpotent 2-Groups

    Institute of Scientific and Technical Information of China (English)

    H. DOOSTIE; A. T. ADNANI

    2007-01-01

    In this paper, we study two classes of 2-generated 2-groups of nilpotency class 2 classified by Kluempen in 2002 and also a class of finite 2-groups of high nilpotency class for their Fibonacci lengths.Their involvement in certain interesting sequences of Tribonacci numbers gives us some explicit formulas for the Fibonacci lengths and this adds to the small class of finite groups for which the Fibonacci length are known.

  10. Condylar volume and condylar area in class I, class II and class III young adult subjects

    Directory of Open Access Journals (Sweden)

    Saccucci Matteo

    2012-12-01

    Full Text Available Abstract Aim Aim of this study was to compare the volume and the shape of mandibular condyles in a Caucasian young adult population, with different skeletal pattern. Material and methods 200 Caucasian patients (15–30 years old, 95 male and 105 females were classified in three groups on the base of ANB angle: skeletal class I (65 patients, skeletal class II (70 patients and skeletal class III (65 patients. Left and right TMJs of each subject were evaluated independently with CBCT (Iluma. TMJ evaluation included: condylar volume; condylar area; morphological index (MI. Condylar volumes were calculated by using the Mimics software. The condylar volume, the area and the morphological index (MI were compared among the three groups, by using non-parametric tests. Results The Kruskal-Wallis test and the Mann Whitney test revealed that: no significant difference was observed in the whole sample between the right and the left condylar volume; subjects in skeletal class III showed a significantly higher condylar volume, respect to class I and class II subjects (p 3 in males and 663.5 ± 81.3 mm3 in females; p 2 in males and 389.76 ± 61.15 mm2 in females; p  Conclusion Skeletal class appeared to be associated to the mandibular condylar volume and to the mandibular condylar area in the Caucasian orthodontic population.

  11. Teachers in Class

    Science.gov (United States)

    Van Galen, Jane

    2008-01-01

    In this article, I argue for a closer read of the daily "class work" of teachers, as posited by Reay, 1998. In developing exploratory class portraits of four teachers who occupy distinctive social positions (two from working-class homes now teaching upper-middle-class children and two from upper-middle-class homes now teaching poor children), I…

  12. How to Teach Small Group Decision-Making in a Basic Business Communication Class. 1981 American Business Communication Association National Committee Report. Unit III. Research and Methodology. Teaching Methodology and Concepts Committee--Subcommittee--3.

    Science.gov (United States)

    American Business Communication Association, Urbana, IL.

    College business communication courses should assist students to learn both how small groups make decisions and how to facilitate small group discussions. Through a unit on small group decision making, the student should be able to understand the role of small groups in organizations, the process of decision making in groups, and the importance of…

  13. Class categories and the subjective dimension of class: the case of Denmark.

    Science.gov (United States)

    Harrits, Gitte Sommer; Pedersen, Helene Helboe

    2017-09-15

    Class relations have been proven to affect various aspects of social life, even in modern individualized societies. However, following claims on individualization and the so-called 'death of class' thesis, studying the subjective dimension of class - that is, the way individuals perceive of class relations and their own position within them - has gone out of style. We argue that even in equalized societies, subjective class perceptions may still influence attitudes and behaviour as they evolve to fit modern class relations. To explore the existence as well as structure and content of perceived social classes, this article investigates how people describe society and social groups in focus group discussions. We find that groups in different positions in terms of education and economy all tend to apply hierarchical class categories to describe Danish society, which is normally seen as one of the most equal societies and political systems in the world. In addition, we find that economic resources serve as a baseline for the hierarchical ordering, often supplemented with notions of education, lifestyle and/or occupational profile. Even though people are somewhat uncomfortable with the notion of class, their descriptions of Danish society and classes are surprisingly similar within and across groups. We conclude that not only do class relations matter; people are also highly aware of the existing classes and able to position themselves and others according to their notion of classes. © London School of Economics and Political Science 2017.

  14. RxClass

    Data.gov (United States)

    U.S. Department of Health & Human Services — The RxClass Browser is a web application for exploring and navigating through the class hierarchies to find the RxNorm drug members associated with each class....

  15. 加快推进京津冀世界级城市群建设--“加快京津冀城市群建设”专家座谈会综述%Accelerate the Construction World-class City Group of Beijing-tianjin-hebei---Accelerate the Construction of Beijing-tianjin-hebei City Group Expert Forum Survey

    Institute of Scientific and Technical Information of China (English)

    薛惠娟; 田学斌; 高钟庭

    2015-01-01

    推进以首都为核心的京津冀世界级城市群建设,是有序疏解北京非首都功能,破解北京大城市病和环首都贫困带难题,促进京津冀区域协调发展和形成新增长极的有效抓手。加快京津冀城市群建设意义重大,有助于疏解北京非首都功能和解决大城市病,有助于形成新增长极和平衡我国南北方布局。京津冀城市群建设的核心问题就是要解决市域之间的边界问题。通过构建合理的城市层级结构,做好环北京周边区域城市建设规划,发挥和创新城市比较优势,加快京津冀城市群建设,彰显每座城市的价值。应把京津石作为京津冀世界级城市群的核心区。加快推进京津冀基础设施一体化和基本公共服务均等化进程,促进京津冀城市群发展。%Advance in the capital as the core of Beijing-tianjin-hebei and world-class city group construction, in order to ease the capital Beijing non functional, crack Beijing urban disease and ring capital poverty with problems, and promote the harmonious development of Beijing-tianjin-hebei region and form an effective starting point for new growth pole. To speed up the Beijing-tianjin-hebei city group construction is of great significance, to ease Beijing capital of non function and solve the big city disease, help to form a new growth pole and balance layout of the north and south of our country. The core problem of the construction of Beijing-tianjin -hebei Urban Agglomeration is to solve the problem of the boundary between the city and the city. By constructing reasonable urban hierarchy, do a good job ring around Beijing urban construction planning, city of play and creativity of comparative advantage, accelerate the construction of Beijing-tianjin-hebei Urban Agglomeration, highlighting the value of every city. We should be the core area of Beijing, Tianjin and Beijing, Tianjin and Hebei world-class city group. Accelerate the integration

  16. Important role of class I heat shock genes hrcA and dnaK in the heat shock response and the response to pH and NaCl stress of group I Clostridium botulinum strain ATCC 3502.

    Science.gov (United States)

    Selby, Katja; Lindström, Miia; Somervuo, Panu; Heap, John T; Minton, Nigel P; Korkeala, Hannu

    2011-05-01

    Class I heat shock genes (HSGs) code for molecular chaperones which play a major role in the bacterial response to sudden increases of environmental temperature by assisting protein folding. Quantitative reverse transcriptase real-time PCR gene expression analysis of the food-borne pathogen Clostridium botulinum grown at 37°C showed that the class I HSGs grpE, dnaK, dnaJ, groEL, and groES and their repressor, hrcA, were expressed at constant levels in the exponential and transitional growth phases, whereas strong downregulation of all six genes was observed during stationary phase. After heat shock from 37 to 45°C, all HSGs were transiently upregulated. A mutant with insertionally inactivated hrcA expressed higher levels of class I HSGs during exponential growth than the wild type, followed by upregulation of only groES and groES after heat shock. Inactivation of hrcA or of dnaK encoding a major chaperone resulted in lower maximum growth temperatures than for the wild type and reduced growth rates under optimal conditions compared to the wild type. The dnaK mutant showed growth inhibition under all tested temperature, pH, and NaCl stress conditions. In contrast, the growth of an hrcA mutant was unaffected by mild temperature or acid stress compared to the wild-type strain, indicating that induced class I HSGs support growth under moderately nonoptimal conditions. We show that the expression of class I HSGs plays a major role for survival and growth of C. botulinum under the stressful environmental conditions that may be encountered during food processing or growth in food products, in the mammalian intestine, or in wounds.

  17. GROUP PROFILE Computer Technique

    Directory of Open Access Journals (Sweden)

    Andrey V. Sidorenkov

    2015-01-01

    Full Text Available This article contains a description of the structure, the software and functional capabilities, and the scope and purposes of application of the Group Profile (GP computer technique. This technique rests on a conceptual basis (the microgroup theory, includes 16 new and modified questionnaires, and a unique algorithm, tied to the questionnaires, for identification of informal groups. The GP yields a wide range of data about the group as a whole (47 indices, each informal group (43 indices, and each group member (16 indices. The GP technique can be used to study different types of groups: production (work groups, design teams, military units, etc., academic (school classes, student groups, and sports.

  18. Equivariant characteristic classes of complex algebraic varieties

    CERN Document Server

    Cappell, Sylvain E; Schuermann, Joerg; Shaneson, Julius L

    2010-01-01

    Homology Hirzebruch characteristic classes for singular varieties have been recently defined by Brasselet-Schuermann-Yokura as an attempt to unify previously known characteristic class theories for singular spaces (e.g., MacPherson-Chern classes, Baum-Fulton-MacPherson Todd classes, and Goresky-MacPherson L-classes, respectively). In this note we define equivariant analogues of these classes for quasi-projective varieties acted upon by a finite group of algebraic automorphisms, and show how these can be used to calculate the homology Hirzebruch classes of global orbifolds. We also compute the new classes in the context of monodromy problems, e.g., for varieties that fiber equivariantly (in the complex topology) over a connected algebraic manifold.

  19. Outer automorphism groups of certain 1-relator groups

    Institute of Scientific and Technical Information of China (English)

    KIM; Goansu

    2010-01-01

    Grossman first showed that outer automorphism groups of 1-relator groups given by orientable surface groups are residually finite,whence mapping class groups of orientable surfaces are residually finite.Allenby,Kim and Tang showed that outer automorphism groups of cyclically pinched 1-relator groups are residually finite,whence mapping class groups of orientable and non-orientable surfaces are residually finite.In this paper we show that outer automorphism groups of certain conjugacy separable 1-relator groups are residually finite.

  20. The Multiplication Group of an AG-group

    OpenAIRE

    Shah, Muhammad; Ali, Asif; Ahmad, Imtiaz; Sorge, Volker

    2014-01-01

    We investigate the multiplication group of a special class of quasigroup called AG-group. We prove some interesting results such as: the multiplication group of an AG-group of order n is non-abelian group of order 2n and its left section is an abelian group of order n. The inner mapping group of an AG-group of any order is a cyclic group of order 2.

  1. 新课改背景下农村初中英语课堂小组活动有效性研究%Study on the Effectiveness of Group Work in the English Class of Rural Junior Middle School under the Background of New Curriculum Reform

    Institute of Scientific and Technical Information of China (English)

    杨旋

    2016-01-01

    Under the guidance of new curriculum reform, class group work is widely used in teaching, and group work plays a very important role in English teaching in rural area. The effectiveness of class group work not only influences students’ learning interest but also has effect on the cultivation of students’ innovative and practice ability. The article has a tentative study on the effectiveness of English class group work.%在新课改的浪潮中,课堂小组活动形式被广泛应用于教学实践中,且对农村英语教学起着非常重要的作用。课堂小组活动是否有效,不仅会影响学生学习英语的积极性,还会影响学生的创新精神和实践能力的培养。文章将对英语课堂小组活动的有效性进行初步研究,以供参考。

  2. On differential characteristic classes

    OpenAIRE

    Ho, Man-Ho

    2013-01-01

    In this paper we give explicit formulas of differential characteristic classes of principal $G$-bundles with connections and prove their expected properties. In particular, we obtain explicit formulas for differential Chern classes, differential Pontryagin classes and differential Euler class. Furthermore, we show that the differential Chern class is the unique natural transformation from (Simons-Sullivan) differential $K$-theory to (Cheeger-Simons) differential characters that is compatible ...

  3. Fairness and Ability Grouping.

    Science.gov (United States)

    Strike, Kenneth A.

    1983-01-01

    A recent controversy regarding ability grouping is that it is often perceived as a means whereby racial or class bias can be subtly transformed into mechanisms of discrimination which exhibit the appearance of fairness and objectivity. This article addresses the question of fairness in ability grouping. (CJB)

  4. Perceptual qualities and material classes.

    Science.gov (United States)

    Fleming, Roland W; Wiebel, Christiane; Gegenfurtner, Karl

    2013-07-11

    Under typical viewing conditions, we can easily group materials into distinct classes (e.g., woods, plastics, textiles). Additionally, we can also make many other judgments about material properties (e.g., hardness, rigidity, colorfulness). Although these two types of judgment (classification and inferring material properties) have different requirements, they likely facilitate one another. We conducted two experiments to investigate the interactions between material classification and judgments of material qualities in both the visual and semantic domains. In Experiment 1, nine students viewed 130 images of materials from 10 different classes. For each image, they rated nine subjective properties (glossiness, transparency, colorfulness, roughness, hardness, coldness, fragility, naturalness, prettiness). In Experiment 2, 65 subjects were given the verbal names of six material classes, which they rated in terms of 42 adjectives describing material qualities. In both experiments, there was notable agreement between subjects, and a relatively small number of factors (weighted combinations of different qualities) were substantially independent of one another. Despite the difficulty of classifying materials from images (Liu, Sharan, Adelson, & Rosenholtz, 2010), the different classes were well clustered in the feature space defined by the subjective ratings. K-means clustering could correctly identify class membership for over 90% of the samples, based on the average ratings across subjects. We also found a high degree of consistency between the two tasks, suggesting subjects access similar information about materials whether judging their qualities visually or from memory. Together, these findings show that perceptual qualities are well defined, distinct, and systematically related to material class membership.

  5. 关于椭圆曲线y2=x(x+σp)(x+σq)在类数为1虚二次域上的Selmer群及Mordell-Weil群结构%On the Selmer Groups and Mordell-Weil Groups of Elliptic Curves y2 =x(x ± p)(x ± q) Over Imaginary Quadratic Number Fields of Class Number One

    Institute of Scientific and Technical Information of China (English)

    李修美

    2013-01-01

    设p,q为奇素数且q-p=2.本文将在类数为1的虚二次域上考虑椭圆曲线y2=x(x±p)(x±q)及其对偶曲线,并在某些具体条件下给出它们的赛莫群和沙法列维奇-泰特群的(ψ)-(2-)部分的信息.%Let p and q be odd prime numbers with q-p =2.The (ψ)-Selmer groups,Shafarevich-Tate groups((ψ)-and 2-paxt) and their dual ones as well the Mordell-Weil groups of elliptic curves y2 =x(x ± p)(x ± q) over imaginary quadratic number fields of class number one are determined explicitly in many cases.

  6. The Continuing Story of Class IIa Bacteriocins

    OpenAIRE

    Drider, Djamel; Fimland, Gunnar; Héchard, Yann; McMullen, Lynn M.; Prévost, Hervé

    2006-01-01

    Many bacteria produce antimicrobial peptides, which are also referred to as peptide bacteriocins. The class IIa bacteriocins, often designated pediocin-like bacteriocins, constitute the most dominant group of antimicrobial peptides produced by lactic acid bacteria. The bacteriocins that belong to this class are structurally related and kill target cells by membrane permeabilization. Despite their structural similarity, class IIa bacteriocins display different target cell specificities. In the...

  7. Determination of diets for the populations of eleven regions of the European community to be used for obtaining radioactive contamination levels. First results concerning the food consumption of individuals classified in nine age-groups; Determination des regimes alimentaires des populations de onze regions de la Communaute Europenne et vue de l'etude des niveaux de contamination radioactive. Premiere serie de resultats concernant la consommation alimentaire des individus groupes en neuf classes d'ages

    Energy Technology Data Exchange (ETDEWEB)

    Ledermann, S.; Lacourly, G.; Garnier, A.; Cresta, M.; Lombardo, E. [Commissariat a l' Energie Atomique, 92 - Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

    1968-07-01

    The present document continues the report CEA-R--2979 - EUR--2768-f. The processing of the data given by the family food enquiry carried out in eleven regions of the European Community, has permitted to determine the food consumption of individuals classified in nine age-groups, in order to study the radioactive contamination levels in the food-chain. The used statistical method is described, and the obtained results are presented in form of double-entry tables giving for each region and for each age-group the mean weekly food-consumption and the contribution of each diet in nutrition principles, in minerals, vitamins, trace elements and calories. (authors) [French] Ce rapport fait suite au rapport CEA-R--2979 - EUR--2768-f. Le traitement de l'information apportee par les enquetes alimentaires familiales realisees dans onze regions de la Communaute Europeenne a permis de determiner les consommations alimentaires des individus groupes en neuf classes d'age, en vue de l'etude des niveaux de contamination radioactive dans les chaines alimentaires. La methode statistique employee est decrite et les resultats obtenus sont presentes sous forme de tableaux a double entree donnant pour chacune des regions etudiees et pour chacune des neuf classes d'age, les consommations moyennes hebdomadaires, ainsi que les apports en principes nutritifs, mineraux, vitamines et oligo-elements, et calories de chaque regime. (auteurs)

  8. PRCR Classes and Activities

    Data.gov (United States)

    Town of Cary, North Carolina — This data is specific to Parks and Recreation classes, workshops, and activities within the course catalog. It contains an entry for upcoming classes.*This data set...

  9. Class 1 Areas

    Data.gov (United States)

    U.S. Environmental Protection Agency — A "Class 1" area is a geographic area recognized by the EPA as being of the highest environmental quality and requiring maximum protection. Class I areas are areas...

  10. Doodling in Math Class

    National Research Council Canada - National Science Library

    Arkenberg, Rebecca

    2013-01-01

      Arkenberg reviews Doodling in Math Class, an Internet resource available at www.youtube.com. Both math and art teachers have recommended the series of YouTube videos "Doodling in Math Class with Vihart...

  11. Introduction to Latent Class Analysis with Applications

    Science.gov (United States)

    Porcu, Mariano; Giambona, Francesca

    2017-01-01

    Latent class analysis (LCA) is a statistical method used to group individuals (cases, units) into classes (categories) of an unobserved (latent) variable on the basis of the responses made on a set of nominal, ordinal, or continuous observed variables. In this article, we introduce LCA in order to demonstrate its usefulness to early adolescence…

  12. Introduction to Latent Class Analysis with Applications

    Science.gov (United States)

    Porcu, Mariano; Giambona, Francesca

    2017-01-01

    Latent class analysis (LCA) is a statistical method used to group individuals (cases, units) into classes (categories) of an unobserved (latent) variable on the basis of the responses made on a set of nominal, ordinal, or continuous observed variables. In this article, we introduce LCA in order to demonstrate its usefulness to early adolescence…

  13. Science Perceptions of Prospective Class Teachers

    Science.gov (United States)

    Ulucinar Sagir, Safak

    2017-01-01

    The perceptions of class teachers, who will deliver science education at the elementary school, of information and science are significant as these affect the quality of education received by children. The aim of this research is to determine perceptions of prospective class teachers of science. The sample group of the research consists of 120…

  14. A Virtual Class Calculus

    DEFF Research Database (Denmark)

    Ernst, Erik; Ostermann, Klaus; Cook, William Randall

    2006-01-01

    model for virtual classes has been a long-standing open question. This paper presents a virtual class calculus, vc, that captures the essence of virtual classes in these full-fledged programming languages. The key contributions of the paper are a formalization of the dynamic and static semantics of vc...

  15. Education and Class.

    Science.gov (United States)

    Van Galen, Jane A.

    2000-01-01

    The working class is nearly invisible in multicultural education literature. Examines the possibilities of a more careful foregrounding of the complexities of social class in shaping life chances, focusing on the educational experiences of working class students and discussing the poor in order to promote understanding of the potential of teacher…

  16. Learning Vocabulary in Group Work in Vietnam

    Science.gov (United States)

    Huong, Le Pham Hoai

    2006-01-01

    This study investigated learning vocabulary in group work at university in Vietnam. The students were studied in two kinds of group settings, "unassisted" and "assisted", the first consisting of five students from the same class level and the second of four from the same class and a student from a higher class. Differences were…

  17. Learning Vocabulary in Group Work in Vietnam

    Science.gov (United States)

    Huong, Le Pham Hoai

    2006-01-01

    This study investigated learning vocabulary in group work at university in Vietnam. The students were studied in two kinds of group settings, "unassisted" and "assisted", the first consisting of five students from the same class level and the second of four from the same class and a student from a higher class. Differences were observed in both…

  18. Persian Preposition Classes

    Directory of Open Access Journals (Sweden)

    Marina Pantcheva

    2007-01-01

    Full Text Available In this paper I present the prepositional system in Persian. I show that Persian prepositions can be divided into three classes (Class 1, Class 2a and Class 2b which exhibit distinct syntactic behavior. Then I examine the question of the categorial status of Class 2 prepositions and demonstrate that they are not to be regarded as nouns. Finally I present the extended PP projection of Persian spatial prepositions and argue for a feature-based analysis of the properties they manifest.

  19. Class, Culture and Politics

    DEFF Research Database (Denmark)

    Harrits, Gitte Sommer

    2013-01-01

    Even though contemporary discussions of class have moved forward towards recognizing a multidimensional concept of class, empirical analyses tend to focus on cultural practices in a rather narrow sense, that is, as practices of cultural consumption or practices of education. As a result......, discussions within political sociology have not yet utilized the merits of a multidimensional conception of class. In light of this, the article suggests a comprehensive Bourdieusian framework for class analysis, integrating culture as both a structural phenomenon co-constitutive of class and as symbolic...

  20. Combination Classes and "Hora de comunicacion."

    Science.gov (United States)

    Eldredge, Dee L.

    1989-01-01

    Ways to combine small classes of higher education students studying Spanish at various levels are described, including judicious use of language laboratories, staggering of the different level groups, and rotation of activities geared toward students' individual proficiency levels. (CB)

  1. Combination Classes and "Hora de comunicacion."

    Science.gov (United States)

    Eldredge, Dee L.

    1989-01-01

    Ways to combine small classes of higher education students studying Spanish at various levels are described, including judicious use of language laboratories, staggering of the different level groups, and rotation of activities geared toward students' individual proficiency levels. (CB)

  2. A new class of variational equation problems

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    Applying an analysis method to a group of multivariable equations, a new class of variational equations are proved. This method is more concise and more direct than the others. This result can be applied to some stochastic control models.

  3. The theories on inequality: class theory

    Directory of Open Access Journals (Sweden)

    Ali Arslan

    2006-11-01

    Full Text Available This stduy aims to analyse  class theory and its major expansions. In addition, the problems and dilemmas of class theory are discussed. Social inequality, either socially or economically, is one of the most common features of capitalist societies. Some people or some social groups have more money, more prestige, more privilege and more influence on the decision making process.               Two main strategies have been used for analysing and explaining inequalities. The first and most popular strategy is “class theory” which stresses ownership and control to explain class differentiation. It concentrates on the inequalities based mainly on the ownership or non-ownership of economic resources. Class theory was fathered by Karl Marx and especially developed by Marxist writers. Class analysts focus on identification of classes as the major social forces of society. There are two main schools of thought in class theory with their variations within each school: a Marxist Class Theory, b Weberian Class Theory  If the Marxist class analysis and Weberian class analysis are examined it will be seen that, two approaches are incompatible and it is impossible to synthesise them. Nevertheless, Hindess sees Weber’s view as the correction of and supplement to Marx’s ideas rather than an alternative. When the ideas of Marx and Weber are compared, it will be clearly seen that both Marx and Weber explain classes in relation to the economy. Nevertheless, while Marx defines classes in terms of the relations of production, Weber defines them in relation to the market. 

  4. Anomaly-safe discrete groups

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Mu-Chun, E-mail: muchunc@uci.edu [Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575 (United States); Fallbacher, Maximilian, E-mail: m.fallbacher@tum.de [Physik–Department T30, Technische Universität München, James–Franck–Straße 1, 85748 Garching (Germany); Ratz, Michael, E-mail: michael.ratz@tum.de [Physik–Department T30, Technische Universität München, James–Franck–Straße 1, 85748 Garching (Germany); Trautner, Andreas, E-mail: andreas.trautner@tum.de [Physik–Department T30, Technische Universität München, James–Franck–Straße 1, 85748 Garching (Germany); Excellence Cluster Universe, Boltzmannstraße 2, 85748 Garching (Germany); Vaudrevange, Patrick K.S., E-mail: patrick.vaudrevange@tum.de [Excellence Cluster Universe, Boltzmannstraße 2, 85748 Garching (Germany); TUM Institute for Advanced Study, Lichtenbergstraße 2a, 85748 Garching (Germany); Arnold Sommerfeld Center for Theoretical Physics, Ludwig–Maximilians–Universität München, Theresienstraße 37, 80333 München (Germany)

    2015-07-30

    We show that there is a class of finite groups, the so-called perfect groups, which cannot exhibit anomalies. This implies that all non-Abelian finite simple groups are anomaly-free. On the other hand, non-perfect groups generically suffer from anomalies. We present two different ways that allow one to understand these statements.

  5. Anomaly-safe discrete groups

    Directory of Open Access Journals (Sweden)

    Mu-Chun Chen

    2015-07-01

    Full Text Available We show that there is a class of finite groups, the so-called perfect groups, which cannot exhibit anomalies. This implies that all non-Abelian finite simple groups are anomaly-free. On the other hand, non-perfect groups generically suffer from anomalies. We present two different ways that allow one to understand these statements.

  6. 中职计算机课堂分组教学的实践探讨%On the Teaching Practice Secondary Vocational of Group Work in the Computer Classes

    Institute of Scientific and Technical Information of China (English)

    蔡洪亮

    2011-01-01

    As a means of teaching, group work has been widely used in the computer teaching in Secondary Vocational education. However, in implementation,to prevent it from becoming a mere formality, it is necessary to establish requirements, to attach importance to the cultivation of team spirit, and to stress a unified process and rational assessment, thus giving full play to the roles of group work.%分组教学作为一种教学手段,在中职计算机课堂教学中获得了较广泛的应用。但为了避免流于形式,在实施过程中需要明确要求,重视团队协作能力培养,强调过程统一与合理评价,真正体现分组教学的作用。

  7. Use of Group Cooperative Learning in Kindergarten Large Class Science Teaching%小组合作学习在幼儿园大班科学教学中的运用研究

    Institute of Scientific and Technical Information of China (English)

    方敏俐

    2016-01-01

    近年来,随着新《纲要》的颁布,在实施幼儿园新课程过程中,许多幼儿教师已经意识到幼儿合作能力培养的重要性,也知道合作学习是教学活动中重要的组织形式,那么什么是小组合作学习、如何在幼儿园科学教学中运用小组合作学习、小组合作学习的成效如何呢?下面将从这四方面进行阐述。%In recent years, with the promulgation of the new"Outline", the implementation process of the new curriculum in kindergarten, many kindergarten teachers have realized the importance of child care co-Ability, also known cooperative learning is teaching an important organizational form, then what is group cooperative learning, how to use cooperative learning groups in kindergarten science teaching, effectiveness of cooperative learning groups do? Below these four areas will be set forth.

  8. Class network routing

    Science.gov (United States)

    Bhanot, Gyan; Blumrich, Matthias A.; Chen, Dong; Coteus, Paul W.; Gara, Alan G.; Giampapa, Mark E.; Heidelberger, Philip; Steinmacher-Burow, Burkhard D.; Takken, Todd E.; Vranas, Pavlos M.

    2009-09-08

    Class network routing is implemented in a network such as a computer network comprising a plurality of parallel compute processors at nodes thereof. Class network routing allows a compute processor to broadcast a message to a range (one or more) of other compute processors in the computer network, such as processors in a column or a row. Normally this type of operation requires a separate message to be sent to each processor. With class network routing pursuant to the invention, a single message is sufficient, which generally reduces the total number of messages in the network as well as the latency to do a broadcast. Class network routing is also applied to dense matrix inversion algorithms on distributed memory parallel supercomputers with hardware class function (multicast) capability. This is achieved by exploiting the fact that the communication patterns of dense matrix inversion can be served by hardware class functions, which results in faster execution times.

  9. Culture and social class.

    Science.gov (United States)

    Miyamoto, Yuri

    2017-08-08

    A large body of research in Western cultures has demonstrated the psychological and health effects of social class. This review outlines a cultural psychological approach to social stratification by comparing psychological and health manifestations of social class across Western and East Asian cultures. These comparisons suggest that cultural meaning systems shape how people make meaning and respond to material/structural conditions associated with social class, thereby leading to culturally divergent manifestations of social class. Specifically, unlike their counterparts in Western cultures, individuals of high social class in East Asian cultures tend to show high conformity and other-orientated psychological attributes. In addition, cultures differ in how social class impacts health (i.e. on which bases, through which pathways, and to what extent). Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. 在探索与实践中收获--写在《声乐集体课教程》出版之际%Harvest in the Exploration and Practice-for Publishing The Tutorial of Group Class of Vocal Music

    Institute of Scientific and Technical Information of China (English)

    张蓉

    2015-01-01

    相比较于声乐个别课教学中,教师教材实施的高度灵活性、开放性、针对性和自主性选择而言,声乐集体课教学则迫切需要一份相对统一、系统、规范的教材来组织教学活动。武汉音乐学院声乐教师团队为满足这种教学需求,经过数年努力推出的教材成果《声乐集体课教程》将“教科书与工具书融为一体,理论性和实践性集于一身,主体性与参考性合为一处”,对个别课和集体课在声乐教学中的作用意义分别做了说明与阐释。%Compared to the individual lesson of vocal music, which of teachers’teaching mate-rials to implement high flexibility, openness, relevance and autonomy of choice, the group class of vocal teaching is an urgent need for a relatively unified, systematic and standardized materials to organize teaching activities. In order to meet this demand, the vocal teaching team in Wuhan Conservatory of Music launched of The Tutorial of Group Class of Vocal Music after several years of efforts, which “integrated textbooks and reference books, set theory and practice all in one, subjectivity and reference collection in one”, interpreted and explained the significance to vocal teaching of individual lesson and group class separately.

  11. Fostering a Middle Class

    Institute of Scientific and Technical Information of China (English)

    YAO BIN

    2011-01-01

    Though there is no official definition of "middle class" in China,the tag has become one few Chinese people believe they deserve anyway.In early August,the Chinese Academy of Social Sciences released a report on China's urban development,saying China had a middle-class population of 230 million in 2009,or 37 percent of its urban residents.It also forecast half of city dwellers in China would be part of the middle class by 2023.

  12. Tailor-Made Classes.

    Science.gov (United States)

    Schreirer, Barbara A.

    1978-01-01

    Adapted teaching materials and procedures were developed at Florida State University to help visually handicapped students in the public schools participate in a mainstreamed home economics class. (MF)

  13. Language, Culture, Class, Gender, and Class Participation.

    Science.gov (United States)

    Vandrick, Stephanie

    This paper explores reasons why some students with English as a Second Language (ESL) feel less entitled to speak out in class than others, discussing ways in which teachers can widen the definition of participation. The first section explains how student background can affect participation. For students who are non-native English speakers and who…

  14. Dentofacial characteristics of patients with Angle Class I and Class II malocclusions

    Directory of Open Access Journals (Sweden)

    Rogério Lacerda dos Santos

    2012-04-01

    Full Text Available OBJECTIVE: The present study assessed some cephalometric measurements of the soft tissue profile in order to observe the behavior of facial convexity in patients with Class I, Class II division 1, and Class II division 2 malocclusions. METHODS: One hundred and thirty pre-treatment teleradiographs of Caucasian patients aged 10-16 years (mean age of 12.6 years were selected for study and divided into 3 groups. The cephalometric measurements used in the present study were the following: H.SN, Cx, NLA, MLA, UL-SUL-S, LL-S, IMPA, and 1-SN. Analysis of variance and Tukey's test were applied for measurements H.SN, Cx, IMPA, 1-SN, MLA, and NLA, whereas Kruskal-Wallis and Dunn's tests were applied for UL-S and LL-S. RESULTS: The results showed statistically significant differences for the measurements H.SN, Cx, UL-S, and IMPA between Groups I, II-1 and II-2 (p < 0.05. Measurements LL-S and MLA showed statistically significant difference between Groups I and II-1 only (p < 0.05. On the other hand, no statistically significant differences were found for measurement NLA among the 3 groups (p < 0.05. CONCLUSION: Regarding facial characteristics expressed by measurements H.SN, Cx, and UL-S, one could conclude that Class II division 1 and Class II division 2 malocclusions, both differed from Class I malocclusion. In addition, Class II division 1 malocclusion was found to have facial characteristics expressed by MLA, which differentiate it from the Class II division 2 and Class 1 malocclusions. Class I, Class II division 1 and Class II division 2 malocclusions showed no difference in facial characteristics expressed by the measurement NLA, and measurement LL-S was directly related to eversion of the lower lip.

  15. Sigma-class glutathione transferases.

    Science.gov (United States)

    Flanagan, Jack U; Smythe, Mark L

    2011-05-01

    Mammalian cytosolic glutathione transferases (GSTs) can be grouped into seven classes. Of these, the sigma class is also widely distributed in nature, with isoforms found in both vertebrates and invertebrates. It contains examples of proteins that have evolved specialized functions, such as the cephalopod lens S-crystallins, the mammalian hematopoietic prostaglandin D(2) synthase, and the helminth 28-kDa antigen. In mammals, the sigma-class GST has both anti- and proinflammatory functions, depending on the type of immune response, and an immunomodulatory function is also associated with the enzyme from helminth parasites. In the fly, it is associated with a specific detoxication activity toward lipid oxidation products. Mice genetically depleted of the sigma-class GST, or transgenically overexpressing it, have provided insight into the physiological roles of the GST. Inhibitors of the mammalian enzyme developed by structure-based methods are effective in controlling allergic response. This review covers the structure, function, and pharmacology of vertebrate and invertebrate GSTs.

  16. Early cephalometric characteristics in Class III malocclusion

    Directory of Open Access Journals (Sweden)

    Vanessa Costa Farias

    2012-04-01

    Full Text Available OBJECTIVE: Early identification of craniofacial morphological characteristics allows orthopedic segmented interventions to attenuate dentoskeletal discrepancies, which may be partially disguised by natural dental compensation. To investigate the morphological characteristics of Brazilian children with Class III malocclusion, in stages I and II of cervical vertebrae maturation and compare them with the characteristics of Class I control patients. METHODS: Pre-orthodontic treatment records of 20 patients with Class III malocclusion and 20 control Class I patients, matched by the same skeletal maturity index and sex, were selected. The craniofacial structures and their relationships were divided into different categories for analysis. Angular and linear measures were adopted from the analyses previously described by Downs, Jarabak, Jacobson and McNamara. The differences found between the groups of Class III patients and Class I control group, both subdivided according to the stage of cervical vertebrae maturation (I or II, were assessed by analysis of variance (ANOVA, complemented by Bonferroni's multiple mean comparisons test. RESULTS: The analysis of variance showed statistically significant differences in the different studied groups, between the mean values found for some angular (SNA, SNB, ANB and linear variables (Co - Gn, N - Perp Pog, Go - Me, Wits, S - Go, Ar - Go. CONCLUSION: Assessed children displaying Class III malocclusion show normal anterior base of skull and maxilla, and anterior positioning of the mandible partially related to increased posterior facial height with consequent mandibular counterclockwise rotation.

  17. The Question of Class

    Science.gov (United States)

    Gorski, Paul C.

    2007-01-01

    For too long, educators' approach to understanding the relationships between poverty, class and education has been framed by studying the behaviors and cultures of poor students and their families. If only people--in the middle and upper-middle classes--can understand "their" culture, why "those people" do not value education, why "those parents"…

  18. The Conversation Class

    Science.gov (United States)

    Jackson, Acy L.

    2012-01-01

    The conversation class occupies a unique place in the process of learning English as a second or foreign language. From the author's own experience in conducting special conversation classes with Persian-speaking adults, he has drawn up a number of simple but important guidelines, some of which he hopes may provide helpful suggestions for the…

  19. Class in disguise

    DEFF Research Database (Denmark)

    Faber, Stine Thidemann; Prieur, Annick

    This paper asks how class can have importance in one of the worlds’ most equal societies: Denmark. The answer is that class here appears in disguised forms. The field under study is a city, Aalborg, in the midst of transition from a stronghold of industrialism to a post industrial economy...

  20. Cutting Class Harms Grades

    Science.gov (United States)

    Taylor, Lewis A., III

    2012-01-01

    An accessible business school population of undergraduate students was investigated in three independent, but related studies to determine effects on grades due to cutting class and failing to take advantage of optional reviews and study quizzes. It was hypothesized that cutting classes harms exam scores, attending preexam reviews helps exam…

  1. DEFINING THE MIDDLE CLASS

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Classifying the middle class remains controversial despite its alleged growth China’s cities housed more than 230 million middle-class residents in 2009 or 37 percent of the urban population,according to the 2011 Blue Book of Cities in China released on August 3.

  2. DEFINING THE MIDDLE CLASS

    Institute of Scientific and Technical Information of China (English)

    WANG HAIRONG

    2011-01-01

    China's cities housed more than 230 million middle-class residents in 2009ot 37 percent of the urban population,according to the 2011 Blue Book of Cities in China released on August 3.In China's main urban centers,Beijing and Shanghai,the middle class accounted for 46 percent and 38 percent,respectively,of the local population.

  3. Universality classes of inflation

    NARCIS (Netherlands)

    Roest, Diederik

    2014-01-01

    We investigate all single-field, slow-roll inflationary models whose slow-roll parameters scale as 1/N in the limit of a large number of e-folds N. We proof that all such models belong to two universality classes, characterised by a single parameter. One class contains small field models like hillto

  4. Teaching Social Class

    Science.gov (United States)

    Tablante, Courtney B.; Fiske, Susan T.

    2015-01-01

    Discussing socioeconomic status in college classes can be challenging. Both teachers and students feel uncomfortable, yet social class matters more than ever. This is especially true, given increased income inequality in the United States and indications that higher education does not reduce this inequality as much as many people hope. Resources…

  5. Generalized Fourier transforms classes

    DEFF Research Database (Denmark)

    Berntsen, Svend; Møller, Steen

    2002-01-01

    The Fourier class of integral transforms with kernels $B(\\omega r)$ has by definition inverse transforms with kernel $B(-\\omega r)$. The space of such transforms is explicitly constructed. A slightly more general class of generalized Fourier transforms are introduced. From the general theory...

  6. Lateral cephalometric diagnosis of asymmetry in Angle Class II subdivision compared to Class I and II

    Directory of Open Access Journals (Sweden)

    Aparecida Fernanda Meloti

    2014-08-01

    Full Text Available INTRODUCTION: Lateral cephalometric radiographs are traditionally required for orthodontic treatment, yet rarely used to assess asymmetries. OBJECTIVE: The objective of the present study was to use lateral cephalometric radiographs to identify existing skeletal and dentoalveolar morphological alterations in Class II subdivision and to compare them with the existing morphology in Class I and II relationship. MATERIAL AND METHODS: Ninety initial lateral cephalometric radiographs of male and female Brazilian children aged between 12 to 15 years old were randomly and proportionally divided into three groups: Group 1 (Class I, Group 2 (Class II and Group 3 (Class II subdivision. Analysis of lateral cephalometric radiographs included angular measurements, horizontal linear measurements and two indexes of asymmetry that were prepared for this study. RESULTS: In accordance with an Index of Dental Asymmetry (IDA, greater mandibular dental asymmetry was identified in Group 3. An Index of Mandibular Asymmetry (IMA revealed less skeletal and dental mandibular asymmetry in Group 2, greater skeletal mandibular asymmetry in Group 1, and greater mandibular dental asymmetry in Group 3. CONCLUSION: Both IDA and IMA revealed greater mandibular dental asymmetry for Group 3 in comparison to Groups 1 and 2. These results are in accordance with those found by other diagnostic methods, showing that lateral cephalometric radiography is an acceptable method to identify existing skeletal and dentoalveolar morphological alterations in malocclusions.

  7. Organize the world`s first-class engineering group by TPM. Pursuit of the ideal state to enhance business efficiency; TPM de sekai ichiryu no ENG`G shudan zukuri. Arubeki sugata no tsuikyu de gyomu koritsuka

    Energy Technology Data Exchange (ETDEWEB)

    Natsume, K. [Toray Industries, Inc., Tokyo (Japan)

    1997-10-01

    Introduced herein are the TPM activities carried out by the engineering group as one of the staff sections at the Toray`s head office. The first step was to clarify awareness of the issues of managers for enhancing efficiency of personnel, work systems, information and business. They were educated by lectures and interviewed by consultants for preliminary surveys, to clarify undesirable items in the work environments and systems. The TPM guidelines were drawn to create production systems of high competitive power. Step diagnoses were repeated to identify the issues in each section. The initial cleaning activities include removal of unnecessary goods and halving documents. The activities to enhance business efficiency include disposal of documents, building databases, utilization of engineering office systems, preparation of manuals, and training/education of employees. In addition to these concrete effects, the following effects have been observed; common use of individual documents, reduced requirements of floppy disks, promoted paperless systems by positive use of electronic mail systems, and improved working environments. 7 figs.

  8. A Study of Group-Based Interactive Learning in Higher Vocational English Class%高职英语课堂小组化互动教学研究

    Institute of Scientific and Technical Information of China (English)

    刘晓华

    2012-01-01

    This paper introduces an empirical study of utilizing group-based interactive teaching strategy in higher vocational English education.The results of this study show that the interactive instruction and strategy practice coupled with portfolio can significantly push English learning and technical knowledge,which is highlighted in vocational education.%本文介绍了一项高职英语小组化互动教学的研究。采用自然教学研究法,以小组活动为载体,进行为期一年的小组互动学习训练。结果显示:多元能力取向的小组化互动教学能有效提高学生的英语学习效能;小组化互动教学彰显语言教学规律,是实现高技能外语人才培养目标的有效途径。

  9. Grouping in Primary Schools and Reference Processes.

    Science.gov (United States)

    Meijnen, G. W.; Guldemond, H.

    2002-01-01

    Studied reference processes in within-class grouping for elementary school students in the Netherlands in homogeneous (n=16) and heterogeneous (n=14) classes. Findings indicate that homogeneous grouping sets strong reference processes in motion, and processes of comparison have considerably greater effects in homogeneous groups, with negative…

  10. 40 CFR 205.155 - Motorcycle class and manufacturer abbreviation.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 24 2010-07-01 2010-07-01 false Motorcycle class and manufacturer abbreviation. 205.155 Section 205.155 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... Motorcycle class and manufacturer abbreviation. (a) Motorcycles must be grouped into classes determined...

  11. 49 CFR 177.842 - Class 7 (radioactive) material.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Class 7 (radioactive) material. 177.842 Section... HIGHWAY Loading and Unloading § 177.842 Class 7 (radioactive) material. (a) The number of packages of Class 7 (radioactive) materials in any transport vehicle or in any single group in any storage...

  12. Neurotoxicity of Quinolinic Acid to Spiral Ganglion Cells in Rats

    Institute of Scientific and Technical Information of China (English)

    肖红俊; 杨琛; 何圆圆; 郑娜

    2010-01-01

    Our study investigated the neurotoxicity of quinolinic acid(QA) to spiral ganglion cells(SGCs),observed the protective effects of N-methyl-D-aspartate(NMDA) receptor antagonist MK-801 and magnesium ions on the QA-induced injury to SGCs,and analyzed the role of QA in otitis media with effusion(OME)-induced sensorineural hearing loss(SNHL).After culture in vitro for 72 h,SGCs were exposed to different media and divided into 4 groups:the blank control group,the QA injury group,the MK-801 treatment group,and th...

  13. The structural dynamics of social class.

    Science.gov (United States)

    Kraus, Michael W; Park, Jun Won

    2017-08-01

    Individual agency accounts of social class persist in society and even in psychological science despite clear evidence for the role of social structures. This article argues that social class is defined by the structural dynamics of society. Specifically, access to powerful networks, groups, and institutions, and inequalities in wealth and other economic resources shape proximal social environments that influence how individuals express their internal states and motivations. An account of social class that highlights the means by which structures shape and are shaped by individuals guides our understanding of how people move up or down in the social class hierarchy, and provides a framework for interpreting neuroscience studies, experimental paradigms, and approaches that attempt to intervene on social class disparities. Copyright © 2017 Elsevier Ltd. All rights reserved.

  14. Sexual activity among female teenagers: a comparison between two groups of middle class adolescents from a private clinic according to pregnancy status Atividade sexual em mulheres adolescentes: uma comparação entre dois grupos de adolescentes de classe média de clínica particular de acordo com estado gravídico

    Directory of Open Access Journals (Sweden)

    Alexandre Faisal-Cury

    2008-09-01

    Full Text Available OBJECTIVES: to investigate patterns of sexual activity among teenagers. METHODS: a cross-sectional study was conducted between July 1998 and September 2000, among 117 sexually active female adolescents from a private clinic, in the city of the Osasco, State of São Paulo, Brazil. They were divided into two groups: one pregnant group (PG comprised 62 adolescents that were either pregnant (46 or had previously been pregnant (16; another group of 55 female adolescents that had never been pregnant (NPG. During consultations with these subjects, a physician conducted a semi-structured interview. Knowledge, attitudes and practices relating to sexual activity were evaluated. The comparison between the two groups was carried out using Student's t test, the chi-square test or Fisher's exact test. RESULTS: the two groups showed considerable similarities in terms of sexual behaviour, having engaged in the first sexual intercourse at the age of 15 and having had an average number of sexual partners of 1.5. Nevertheless, adolescents in the PG group had initiated sexual life earlier and tended to use less contraceptive methods during the first intercourse. Despite widespread knowledge of contraception, a large number of the adolescents did not use any contraceptive method during first sexual intercourse. In their current sexual life, an average of 81% of the participants referred to attaining orgasm. CONCLUSIONS: knowledge about contraceptive techniques is not enough to avoid unplanned pregnancies, suggesting the importance of investigating other psychosocial aspects of motherhood and maternal identity among teenagers.OBJETIVOS: investigar padrões de atividade sexual em adolescentes. MÉTODOS: estudo transversal realizado entre julho de 1998 e setembro de 2000, com 117 mulheres adolescentes sexualmente ativas oriundas de clínica privada, em Osasco, São Paulo, Brasil. Foram constituídos dois grupos: um grupo de grávidas (PG com 62 adolescentes que estavam

  15. Groups and Violence

    Science.gov (United States)

    Bhavnani, Ravi; Miodownik, Dan; Riolo, Rick

    Violence can take place along a multitude of cleavages, e.g., (1) between political groups like the Kach Movement, pitting West Bank settlers against Israeli governments supporting the land-for-peace agenda; (2) between religious groups, such as Christians and Muslims in the Nigerian cities of Jos and Kaduna; (3) along class lines, as in India between Dalits and members of the Brahminical upper castes, upwardly mobile intermediate castes, and even other backward castes such as the Thevars; and (4) between ethnic groups such as the Hutu and Tutsi, both within and across state boundaries in Rwanda and neighboring Burundi.

  16. Effects of Ability Grouping on Student Achievement.

    Science.gov (United States)

    Kulik, James A.; Kulik, Chen-Lin C.

    1987-01-01

    Examines the effect of within-class and between-class ability groupings on the academic achievement of gifted elementary and secondary level students. Results showed that gifted students gained more academically than they would have if they had been taught in heterogeneous classes. (PS)

  17. Social Class Dialogues and the Fostering of Class Consciousness

    Science.gov (United States)

    Madden, Meredith

    2015-01-01

    How do critical pedagogies promote undergraduate students' awareness of social class, social class identity, and social class inequalities in education? How do undergraduate students experience class consciousness-raising in the intergroup dialogue classroom? This qualitative study explores undergraduate students' class consciousness-raising in an…

  18. Semantic Analysis of Virtual Classes and Nested Classes

    DEFF Research Database (Denmark)

    Madsen, Ole Lehrmann

    1999-01-01

    Virtual classes and nested classes are distinguishing features of BETA. Nested classes originated from Simula, but until recently they have not been part of main stream object- oriented languages. C++ has a restricted form of nested classes and they were included in Java 1.1. Virtual classes...... the central elements of the semantic analysis used in the Mjølner BETA compiler....

  19. Social Class Dialogues and the Fostering of Class Consciousness

    Science.gov (United States)

    Madden, Meredith

    2015-01-01

    How do critical pedagogies promote undergraduate students' awareness of social class, social class identity, and social class inequalities in education? How do undergraduate students experience class consciousness-raising in the intergroup dialogue classroom? This qualitative study explores undergraduate students' class consciousness-raising in an…

  20. Geometric group theory

    CERN Document Server

    Bestvina, Mladen; Vogtmann, Karen

    2014-01-01

    Geometric group theory refers to the study of discrete groups using tools from topology, geometry, dynamics and analysis. The field is evolving very rapidly and the present volume provides an introduction to and overview of various topics which have played critical roles in this evolution. The book contains lecture notes from courses given at the Park City Math Institute on Geometric Group Theory. The institute consists of a set of intensive short courses offered by leaders in the field, designed to introduce students to exciting, current research in mathematics. These lectures do not duplicate standard courses available elsewhere. The courses begin at an introductory level suitable for graduate students and lead up to currently active topics of research. The articles in this volume include introductions to CAT(0) cube complexes and groups, to modern small cancellation theory, to isometry groups of general CAT(0) spaces, and a discussion of nilpotent genus in the context of mapping class groups and CAT(0) gro...

  1. Identifying classes of persons with mild intellectual disability or borderline intellectual functioning: a latent class analysis.

    Science.gov (United States)

    Nouwens, Peter J G; Lucas, Rosanne; Smulders, Nienke B M; Embregts, Petri J C M; van Nieuwenhuizen, Chijs

    2017-07-17

    Persons with mild intellectual disability or borderline intellectual functioning are often studied as a single group with similar characteristics. However, there are indications that differences exist within this population. Therefore, the aim of this study was to identify classes of persons with mild intellectual disability or borderline intellectual functioning and to examine whether these classes are related to individual and/or environmental characteristics. Latent class analysis was performed using file data of 250 eligible participants with a mean age of 26.1 (SD 13.8, range 3-70) years. Five distinct classes of persons with mild intellectual disability or borderline intellectual functioning were found. These classes significantly differed in individual and environmental characteristics. For example, persons with a mild intellectual disability experienced fewer problems than those with borderline intellectual disability. The identification of five classes implies that a differentiated approach is required towards persons with mild intellectual disability or borderline intellectual functioning.

  2. Social class and cause of death.

    Science.gov (United States)

    Erikson, Robert; Torssander, Jenny

    2008-10-01

    Previous studies have shown that causes of death differ in their relationship to social class, but we lack a more comprehensive description of this variation. The present study provides a detailed and extensive list of social class differences for a large number of specific causes of death. All deaths between 1991 and 2003 in Sweden were linked with information on household social class from 1990. Relative death risks and excess mortality in groups of causes according to the European shortlist were estimated separately for men and women in eight classes using Cox Regression. A clear mortality gradient among employees was found for the majority of causes, from low-relative death risks among higher managerial and professional occupations to relatively high risks for the unskilled working class. There is considerable variation in the strength of the association, from causes such as malignant melanoma, breast cancer and transport accidents among women, where no clear class differences were found. At the other extreme, mental and behavioural disorders, endocrine, nutritional and metabolic diseases and diseases of the respiratory system all show steep slopes for both men and women. Circulatory diseases and cancer together account for 15-20% of excess mortality. Exceptions to the general pattern--causes of death in which higher social classes are exposed to greater death risks or in which there is no mortality gradient--are practically non-existent. There is nevertheless significant variation in the strength of the class differences in specific causes.

  3. IELP Class Observation

    Institute of Scientific and Technical Information of China (English)

    陈了了

    2010-01-01

    @@ As an exchange student majoring in English, I am curious about how English is taught to international students here in America. Therefore, I observed an IELP (Intensive English Learning Program) class in Central Connecticut State University where I study.

  4. Teaching Heterogeneous Classes.

    Science.gov (United States)

    Millrood, Radislav

    2002-01-01

    Discusses an approach to teaching heterogeneous English-as-a-Second/Foreign-Language classes. Draws on classroom research data to describe the features of a success-building lesson context. (Author/VWL)

  5. Classes of Heart Failure

    Science.gov (United States)

    ... Disease Venous Thromboembolism Aortic Aneurysm More Classes of Heart Failure Updated:Sep 28,2016 Doctors usually classify patients' ... Blood Pressure Tracker Find additional helpful resources here Heart Failure • Home • About Heart Failure Introduction Types of Heart ...

  6. MKT 438 Complete Class

    OpenAIRE

    admin

    2015-01-01

      To purchase this material click below link   http://www.assignmentcloud.com/MKT-438/MKT-438-Complete-Class-Guide   For more classes visit www.assignmentcloud.com   MKT 438 Week 1 Individual Assignment Defining Public Relation Paper MKT 438 Week 2 Team Assignment Public Relations Campaign Overview Paper MKT 438 Week 3 Individual Assignment Functions of Public Relation Paper MKT 438 Week 3 Team Assignment Public Relations Campaig...

  7. A class in astrobiology

    Science.gov (United States)

    Airieau, S. A.

    1999-09-01

    The goal of this class is to provide basic astrobiology knowledge to upper division science students. The scope is broad and in-depth coverage is not possible in this introductory course. Instead, science students from various branches of academia can acquire a broad basis and understanding of the other fields: astronomy, biology, geology, biochemistry, planetary and space sciences. The class is highly modular and allows instructors to concentrate on or eliminate topics according to their priorities and preferences.

  8. Nordic Walking Classes

    CERN Multimedia

    Fitness Club

    2015-01-01

    Four classes of one hour each are held on Tuesdays. RDV barracks parking at Entrance A, 10 minutes before class time. Spring Course 2015: 05.05/12.05/19.05/26.05 Prices 40 CHF per session + 10 CHF club membership 5 CHF/hour pole rental Check out our schedule and enroll at: https://espace.cern.ch/club-fitness/Lists/Nordic%20Walking/NewForm.aspx? Hope to see you among us! fitness.club@cern.ch

  9. Comparing a Yoga Class with a Resistance Exercise Class: Effects on Body Satisfaction and Social Physique Anxiety in University Women.

    Science.gov (United States)

    Gammage, Kimberley L; Drouin, Breanne; Lamarche, Larkin

    2016-11-01

    The current study compared a single yoga group exercise class and a resistance group exercise class for their effects on state body satisfaction and social physique anxiety in women. A pretest-posttest design was used. Participants (N = 46) completed both a resistance exercise class and yoga class in a counterbalanced order. Measures of body satisfaction and social physique anxiety were completed immediately before and after each class. A 2 (time) × 2 (class type) repeatedmeasures multiple analysis of variance showed a significant overall Time × Class Type interaction (F2,44 = 5.69, P yoga class. After both classes, there was a significant decrease in social physique anxiety, but the magnitude of the change was larger after the yoga class than after the resistance class. Both types of exercise class were associated with improvements in body image, but there were greater improvements after the yoga class. This study provided evidence of the positive effects of yoga for reducing state social physique anxiety and increasing state body satisfaction, adding to correlational evidence suggesting that yoga is particularly beneficial for improving body image-related outcomes in women.

  10. Archform comparisons between skeletal class II and III malocclusions.

    Science.gov (United States)

    Zou, Wei; Wu, JiaQi; Jiang, JiuHui; Xu, TianMin; Li, CuiYing

    2014-01-01

    The purpose of this cross-sectional research was to explore the relationship of the mandibular dental and basal bone archforms between severe Skeletal Class II (SC2) and Skeletal Class III (SC3) malocclusions. We also compared intercanine and intermolar widths in these two malocclusion types. Thirty-three virtual pretreatment mandibular models (Skeletal Class III group) and Thirty-five Skeletal Class II group pretreatment models were created with a laser scanning system. FA (the midpoint of the facial axis of the clinical crown)and WALA points (the most prominent point on the soft-tissue ridge)were employed to produce dental and basal bone archforms, respectively. Gained scatter diagrams of the samples were processed by nonlinear regression analysis via SPSS 17.0. The mandibular dental and basal bone intercanine and intermolar widths were significantly greater in the Skeletal Class III group compared to the Skeletal Class II group. In both groups, a moderate correlation existed between dental and basal bone arch widths in the canine region, and a high correlation existed between dental and basal bone arch widths in the molar region. The coefficient of correlation of the Skeletal Class III group was greater than the Skeletal Class II group. Fourth degree, even order power functions were used as best-fit functions to fit the scatter plots. The radius of curvature was larger in Skeletal Class III malocclusions compared to Skeletal Class II malocclusions (rWALA3>rWALA2>rFA3>rFA2). In conclusion, mandibular dental and basal intercanine and intermolar widths were significantly different between the two groups. Compared with Skeletal Class II subjects, the mandibular archform was more flat for Skeletal Class III subjects.

  11. PROC LCA: A SAS Procedure for Latent Class Analysis

    Science.gov (United States)

    Lanza, Stephanie T.; Collins, Linda M.; Lemmon, David R.; Schafer, Joseph L.

    2007-01-01

    Latent class analysis (LCA) is a statistical method used to identify a set of discrete, mutually exclusive latent classes of individuals based on their responses to a set of observed categorical variables. In multiple-group LCA, both the measurement part and structural part of the model can vary across groups, and measurement invariance across…

  12. PROC LCA: A SAS Procedure for Latent Class Analysis

    Science.gov (United States)

    Lanza, Stephanie T.; Collins, Linda M.; Lemmon, David R.; Schafer, Joseph L.

    2007-01-01

    Latent class analysis (LCA) is a statistical method used to identify a set of discrete, mutually exclusive latent classes of individuals based on their responses to a set of observed categorical variables. In multiple-group LCA, both the measurement part and structural part of the model can vary across groups, and measurement invariance across…

  13. Becoming Marginalized in a Middle School Physical Education Class.

    Science.gov (United States)

    Smith, Barbara Tyree; Goc-Karp, Grace

    This study examined the effects of social competence, group formation, and group behavior on the marginalization of students in a 7th-grade physical education setting. Marginalized students are defined as those in the class, but not "of" the class. In addition, factors such as individual and team activity and teacher expectations help to…

  14. Impact of Group Exams in a Graduate Intermediate Accounting Class

    Science.gov (United States)

    Bay, Darlene; Pacharn, Parunchana

    2017-01-01

    Cooperative learning techniques have been found to be quite successful in a variety of learning environments. However, in university-level accounting courses, investigations of the efficacy of cooperative learning pedagogical methods have produced mixed results at best. To continue the search for a cooperative learning method that is effective in…

  15. Group X

    Energy Technology Data Exchange (ETDEWEB)

    Fields, Susannah

    2007-08-16

    This project is currently under contract for research through the Department of Homeland Security until 2011. The group I was responsible for studying has to remain confidential so as not to affect the current project. All dates, reference links and authors, and other distinguishing characteristics of the original group have been removed from this report. All references to the name of this group or the individual splinter groups has been changed to 'Group X'. I have been collecting texts from a variety of sources intended for the use of recruiting and radicalizing members for Group X splinter groups for the purpose of researching the motivation and intent of leaders of those groups and their influence over the likelihood of group radicalization. This work included visiting many Group X websites to find information on splinter group leaders and finding their statements to new and old members. This proved difficult because the splinter groups of Group X are united in beliefs, but differ in public opinion. They are eager to tear each other down, prove their superiority, and yet remain anonymous. After a few weeks of intense searching, a list of eight recruiting texts and eight radicalizing texts from a variety of Group X leaders were compiled.

  16. Dissemination and Persistence of blaCTX-M-9 Are Linked to Class 1 Integrons Containing CR1 Associated with Defective Transposon Derivatives from Tn402 Located in Early Antibiotic Resistance Plasmids of IncHI2, IncP1-α, and IncFI Groups

    Science.gov (United States)

    Novais, Ângela; Cantón, Rafael; Valverde, Aránzazu; Machado, Elisabete; Galán, Juan-Carlos; Peixe, Luísa; Carattoli, Alessandra; Baquero, Fernando; Coque, Teresa M.

    2006-01-01

    This study analyzes the diversity of In60, a class 1 integron bearing CR1 and containing blaCTX-M-9, and its association with Tn402, Tn21, and classical conjugative plasmids among 45 CTX-M-9-producing clinical strains (41 Escherichia coli strains, 2 Klebsiella pneumoniae strains, 1 Salmonella enterica strain, and 1 Enterobacter cloacae strain). Forty-five patients in a Spanish tertiary care hospital were studied (1996 to 2003). The diversity of In60 and association of In60 with Tn402 or mercury resistance transposons were investigated by overlapping PCR assays and/or hybridization. Plasmid characterization included comparison of restriction fragment length polymorphism patterns and determination of incompatibility group by PCR-based replicon typing, sequencing, and hybridization. CTX-M-9 plasmids belonged to IncHI2 (n = 26), IncP-1α (n = 10), IncFI (n = 4), and IncI (n = 1) groups. Genetic platforms containing blaCTX-M-9 were classified in six types in relation to the In60 backbone and in eight subtypes in relation to Tn402 derivatives. They were associated with Tn21 sequences when located in IncP-1α or IncHI2 plasmids. Our study identified blaCTX-M-9 in a high diversity of CR1-bearing class 1 integrons linked to different Tn402 derivatives, often to Tn21, highlighting the role of recombination events in the evolution of antibiotic resistance plasmids. The presence of blaCTX-M-9 on broad-host-range IncP-1α plasmids might contribute to its dissemination to hosts that were not members of the family Enterobacteriaceae. PMID:16870767

  17. Class barriers to psychotherapy and counselling.

    Science.gov (United States)

    Ollerton, I

    1995-01-01

    This paper focuses on the barriers to the uptake of counselling and psychotherapy from a social class perspective. It begins with a definition of class before discussing particular aspects that inhibit uptake. Barriers focused upon are those regarding travel, costs, child care, appointment times and location of actual therapists. Likewise barriers to the effective outcome, for example cognitive and verbal abilities of clients, are addressed and the way in which these barriers inhibit the referral rate from particular social groups. Finally the self-imposed barriers of certain social groups are explored regarding self exile from the counselling arena.

  18. The shape and size of the sella turcica in skeletal Class I, Class II, and Class III Saudi subjects.

    Science.gov (United States)

    Alkofide, Eman A

    2007-10-01

    The purpose of this study was to describe the shape and measure the size of the sella turcica in Saudi subjects with different skeletal types. Lateral cephalometric radiographs of 180 individuals (90 males and 90 females) with an age range of 11-26 years were taken and distributed according to skeletal classification; 60 Class I, 60 Class II, and 60 Class III. The sella turcica on each radiograph was analysed and measured to determine the shape of the sella, in addition to the linear dimensions of length, depth, and diameter. A Student's t-test was used to calculate differences in linear dimensions, while a one-way analysis of variance was performed to study the relationship between skeletal type and sella size. The results show that the sella turcica presented with a normal morphology in the majority of subjects (67 per cent). No significant differences in linear dimensions between genders could be found. When age was evaluated, significant differences were found between the older (15 years or more) and the younger (11-14 years) age groups at the 0.01 and 0.001 levels for length, depth, and diameter. Sella size of the older age group was larger than in the younger age group. When skeletal type was compared with sella size, a significant difference was found in the diameter of sella between the Class II and Class III subjects (P sella turcica area in Saudi subjects.

  19. Topological structural classes of complex networks

    Science.gov (United States)

    Estrada, Ernesto

    2007-01-01

    We use theoretical principles to study how complex networks are topologically organized at large scale. Using spectral graph theory we predict the existence of four different topological structural classes of networks. These classes correspond, respectively, to highly homogenous networks lacking structural bottlenecks, networks organized into highly interconnected modules with low inter-community connectivity, networks with a highly connected central core surrounded by a sparser periphery, and networks displaying a combination of highly connected groups (quasicliques) and groups of nodes partitioned into disjoint subsets (quasibipartites). Here we show by means of the spectral scaling method that these classes really exist in real-world ecological, biological, informational, technological, and social networks. We show that neither of three network growth mechanisms—random with uniform distribution, preferential attachment, and random with the same degree sequence as real network—is able to reproduce the four structural classes of complex networks. These models reproduce two of the network classes as a function of the average degree but completely fail in reproducing the other two classes of networks.

  20. On Automorphisms of some Finite -Groups

    Indian Academy of Sciences (India)

    Manoj K Yadav

    2008-02-01

    We give a sufficient condition on a finite -group of nilpotency class 2 so that $\\mathrm{Aut}_c(G)=\\mathrm{Inn}(G)$, where $\\mathrm{Aut}_c(G)$ and $\\mathrm{Inn}(G)$ denote the group of all class preserving automorphisms and inner automorphisms of respectively. Next we prove that if and are two isoclinic finite groups (in the sense of . Hall), then $\\mathrm{Aut}_c(G)≅\\mathrm{Aut}_c(H)$. Finally we study class preserving automorphisms of groups of order $p^5,p$ an odd prime and prove that $\\mathrm{Aut}_c(G)=\\mathrm{Inn}(G)$ for all the groups of order $p^5$ except two isoclinism families.

  1. Do Convolutional Neural Networks Learn Class Hierarchy?

    Science.gov (United States)

    Alsallakh, Bilal; Jourabloo, Amin; Ye, Mao; Liu, Xiaoming; Ren, Liu

    2017-08-29

    Convolutional Neural Networks (CNNs) currently achieve state-of-the-art accuracy in image classification. With a growing number of classes, the accuracy usually drops as the possibilities of confusion increase. Interestingly, the class confusion patterns follow a hierarchical structure over the classes. We present visual-analytics methods to reveal and analyze this hierarchy of similar classes in relation with CNN-internal data. We found that this hierarchy not only dictates the confusion patterns between the classes, it furthermore dictates the learning behavior of CNNs. In particular, the early layers in these networks develop feature detectors that can separate high-level groups of classes quite well, even after a few training epochs. In contrast, the latter layers require substantially more epochs to develop specialized feature detectors that can separate individual classes. We demonstrate how these insights are key to significant improvement in accuracy by designing hierarchy-aware CNNs that accelerate model convergence and alleviate overfitting. We further demonstrate how our methods help in identifying various quality issues in the training data.

  2. Semi-Quantitative Group Testing

    CERN Document Server

    Emad, Amin

    2012-01-01

    We consider a novel group testing procedure, termed semi-quantitative group testing, motivated by a class of problems arising in genome sequence processing. Semi-quantitative group testing (SQGT) is a non-binary pooling scheme that may be viewed as a combination of an adder model followed by a quantizer. For the new testing scheme we define the capacity and evaluate the capacity for some special choices of parameters using information theoretic methods. We also define a new class of disjunct codes suitable for SQGT, termed SQ-disjunct codes. We also provide both explicit and probabilistic code construction methods for SQGT with simple decoding algorithms.

  3. Demographic Data - MDC_BlockGroup

    Data.gov (United States)

    NSGIC Local Govt | GIS Inventory — A polygon feature class of Miami-Dade County Census 2000 Block Groups. A census Block Group is a statistical subdivision of a census Tract consisting of a cluster of...

  4. Demographic Data - MDC_BlockGroup

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — A polygon feature class of Miami-Dade County Census 2000 Block Groups. A census Block Group is a statistical subdivision of a census Tract consisting of a cluster...

  5. SOME IDEAS ON GROUP WORK

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    Group work is a widely adopted activity in the oral English class, and certainly boasts a number of advantages. However, problems may occur in the organization of group discussions and the reports afterwards. This paper puts forward some suggestions for solving these problems.

  6. Homomorphisms between Kaehler groups

    CERN Document Server

    Arapura, Donu

    2009-01-01

    This is partly a survey and partly a research article. Some known results and open problems about Kaehler groups (fundamental groups of compact Kaehler manifolds) are discussed. A new notion of Kaehler homomorphism is introduced. This is a homomorphism induced by a holomorphic map between these types of manifolds. Some obstructions for a homomorphism to be Kaehler are discussed. Among these is the main result on the vanishing of a certain cohomology class associated to such map. This is reduced to the decomposition theorem for perverse sheaves suitably extended to Kaehler orbifolds.

  7. Group morphology

    NARCIS (Netherlands)

    Roerdink, Jos B.T.M.

    2000-01-01

    In its original form, mathematical morphology is a theory of binary image transformations which are invariant under the group of Euclidean translations. This paper surveys and extends constructions of morphological operators which are invariant under a more general group TT, such as the motion group

  8. STUDENT ABILITIES, GROUPING PATTERNS, AND CLASSROOM INTERACTION.

    Science.gov (United States)

    DREWS, ELIZABETH M.

    A STUDY WAS MADE TO DETERMINE THE EFFECT OF HETEROGENEOUS AND HOMOGENEOUS GROUPING IN NINTH-GRADE ENGLISH CLASSES. ON THE BASES OF IQ AND READING LANGUAGE SKILLS, STUDENTS WERE GROUPED AT THREE ABILITY LEVELS AND PLACE IN HETEROGENEOUS, HOMOGENEOUS SUPERIOR, HOMOGENEOUS SLOW, AND HOMOGENEOUS AVERAGE CLASSES. TEACHER VARIABLES WERE REDUCED BY…

  9. Talking Class in Tehroon

    DEFF Research Database (Denmark)

    Elling, Rasmus Christian; Rezakhani, Khodadad

    2016-01-01

    Persian, like any other language, is laced with references to class, both blatant and subtle. With idioms and metaphors, Iranians can identify and situate others, and thus themselves, within hierarchies of social status and privilege, both real and imagined. Some class-related terms can be traced...... back to medieval times, whereas others are of modern vintage, the linguistic legacy of television shows, pop songs, social media memes or street vernacular. Every day, it seems, an infectious set of phrases appears that make yesterday’s seem embarrassingly antiquated....

  10. NR 512 Entire Class

    OpenAIRE

    Laynebaril1

    2017-01-01

     NR 512 Entire Class   Click Link Below To Buy:   http://hwcampus.com/shop/nr-512-entire-class/ Or Visit www.hwcampus.com   NR512 Week 1 Discussion Latest 2017 Integration of Nursing Informatics Skills and Competencies (graded) • Reflect on your own practice. Discuss how informatics is used in your practice. What is your primary area where you would use informatics? NR512 Week 2 Discussion Latest 2017 Wisdom Versus Judgment (graded) How does the conc...

  11. Class Actions in Denmark

    DEFF Research Database (Denmark)

    Werlauff, Erik

    2009-01-01

    The article deals with the relatively new Danish Act on Class Action (Danish: gruppesøgsmål) which was suggested by The Permanent Council on Civil procedure (Retsplejerådet) of which the article's author is a member. The operability of the new provisions is illustrated through some wellknown Dani...... cases: Hafnia case (investment prospectus), and Danish Eternit (roof elements) where the existence of Danish provisions on class actions might have made a difference, and the article also deals with the delicate questions of opt-in and opt-out....

  12. MIDDLE CLASS MOVEMENTS

    OpenAIRE

    Dr. K. Sravana Kumar

    2016-01-01

                The middle class is placed between labour and capital. It neither directly awns the means of production that pumps out the surplus generated by wage labour power, nor does it, by its own labour, produce the surplus which has use and exchange value. Broadly speaking, this class consists of the petty bourgeoisie and the white-collar workers. The former are either self-employed or involved in the distribution of commodities and t...

  13. MIDDLE CLASS MOVEMENTS

    OpenAIRE

    Dr. K. Sravana Kumar

    2016-01-01

                The middle class is placed between labour and capital. It neither directly awns the means of production that pumps out the surplus generated by wage labour power, nor does it, by its own labour, produce the surplus which has use and exchange value. Broadly speaking, this class consists of the petty bourgeoisie and the white-collar workers. The former are either self-employed or involved in the distribution of commodities and t...

  14. On the middle class

    OpenAIRE

    MacLennan, Michael; Magalhães, Beatrix Judice

    2013-01-01

    The Middle class as a concept has evolved over time, taking on various meanings at various points throughout history, becoming an object to aspire to for poor people, an object of desire for a strong government, a buzzword for politicians the world over, and the source of new customers for firms, and the global economy more broadly. This special issue of Poverty in Focus, exclusively devoted to the exploration of themes related to the middle class is part of a larger endeavour initiated by Th...

  15. Automorphisms of free groups with boundaries

    DEFF Research Database (Denmark)

    A. Jensen, Craig; Wahl, Nathalie

    2004-01-01

    The automorphisms of free groups with boundaries form a family of groups A_{n,k} closely related to mapping class groups, with the standard automorphisms of free groups as A_{n,0} and (essentially) the symmetric automorphisms of free groups as A_{0,k}. We construct a contractible space L_{n,k} on...

  16. Social class and heart disease mortality among African Americans.

    Science.gov (United States)

    Barnett, Elizabeth; Williams, Carol R; Moore, Latetia; Chen, Fangfei

    2002-01-01

    The purpose of the present study was to examine variation in heart disease death rates by the social class of decedents. The term, "social class" refers to a complex set of phenomena such as control over economic resources, social status, and power relative to others in society. The target population for this study was African-American adults aged 35-74 years old who resided in the United States during the years 1996-1997. As a proxy for social class, we examined 5 levels of educational attainment: 0-8 years of school completed (Social Class I), 9-11 years of school completed (Social Class II), high school graduate/12 years of school completed (Social Class III), some college completed (Social Class IV), and college degree completed (Social Class V). Older age, male gender, and lower social class were all independently associated with higher heart disease death rates. For all ages, more disadvantaged social classes had a higher risk of heart disease mortality. The highest relative risks were found for Social Classes I and II among the younger age groups. Many of the "prerequisites" for the "heart healthy lifestyle" are predicated on the benefits of a privileged social class position. For African Americans, there are the additional stressors of segregation, exclusion, and discrimination to overcome, as well as the cumulative physiological toll of lifetime resistance to various forms of racism. For many African Americans in disadvantaged social class positions, the obstacles to reducing the risk for heart disease are very difficult to overcome.

  17. Class, Cultism, and Multiculturalism.

    Science.gov (United States)

    McLaren, Peter; Farahmandpur, Ramin

    2001-01-01

    Globalization has hurt both developed and developing countries. Capitalism's relations of exploitation can hurt people of color in disabling ways. Discusses the relationships among race, gender, ethnic, and class identities in order to articulate a political framework that moves toward transnational ethnic alliances, abolishing the role of capital…

  18. Teaching Very Large Classes

    Science.gov (United States)

    DeRogatis, Amy; Honerkamp, Kenneth; McDaniel, Justin; Medine, Carolyn; Nyitray, Vivian-Lee; Pearson, Thomas

    2014-01-01

    The editor of "Teaching Theology and Religion" facilitated this reflective conversation with five teachers who have extensive experience and success teaching extremely large classes (150 students or more). In the course of the conversation these professors exchange and analyze the effectiveness of several active learning strategies they…

  19. Shrinking Your Class

    Science.gov (United States)

    Herron-Thorpe, Farren L.; Olson, Jo Clay; Davis, Denny

    2010-01-01

    Toys in the classroom was the result of a National Science Foundation grant that brought two engineering graduate students to a middle school math class. The graduate students and teachers collaborated in an effort to enhance students' mathematical learning. An engineering context was theorized as a way to further develop students' understanding…

  20. Openers for Biology Classes.

    Science.gov (United States)

    Gridley, C. Robert R.

    This teaching guide contains 200 activities that are suitable for openers and demonstrations in biology classes. Details are provided regarding the use of these activities. Some of the broad topics under which the activities are organized include algae, amphibians, bacteria, biologists, crustaceans, dinosaurs, ecology, evolution, flowering plants,…

  1. Reference class forecasting

    DEFF Research Database (Denmark)

    Flyvbjerg, Bent

    Underbudgettering og budgetoverskridelser forekommer i et flertal af større bygge- og anlægsprojekter. Problemet skyldes optimisme og/eller strategisk misinformation i budgetteringsprocessen. Reference class forecasting (RCF) er en prognosemetode, som er udviklet for at reducere eller eliminere...

  2. An "expanded" class perspective

    DEFF Research Database (Denmark)

    Steur, Luisa Johanna

    2014-01-01

    -back of Adivasis against their age-old colonization or the work of ‘external’ agitators. Capitalist restructuring and ‘globalization’ was generally seen as simply the latest chapter in the suffering of these Adivasis. Little focused attention was paid to the recent class trajectory of their lives under changing...

  3. Fostering a Middle Class

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Though there is no official definition of "middle class" in China, the tag has become one few Chinese people believe they deserve anyway.In early August, the Chinese Academy of Social Sciences released a report on China’s urban development,

  4. Group analysis of differential equations

    CERN Document Server

    Ovsiannikov, L V

    1982-01-01

    Group Analysis of Differential Equations provides a systematic exposition of the theory of Lie groups and Lie algebras and its application to creating algorithms for solving the problems of the group analysis of differential equations.This text is organized into eight chapters. Chapters I to III describe the one-parameter group with its tangential field of vectors. The nonstandard treatment of the Banach Lie groups is reviewed in Chapter IV, including a discussion of the complete theory of Lie group transformations. Chapters V and VI cover the construction of partial solution classes for the g

  5. Group devaluation and group identification

    NARCIS (Netherlands)

    Leach, C.W.; Rodriguez Mosquera, P.M.; Vliek, M.L.W.; Hirt, E.

    2010-01-01

    In three studies, we showed that increased in-group identification after (perceived or actual) group devaluation is an assertion of a (preexisting) positive social identity that counters the negative social identity implied in societal devaluation. Two studies with real-world groups used order manip

  6. Coincidence classes in nonorientable manifolds

    Directory of Open Access Journals (Sweden)

    2006-01-01

    Full Text Available We study Nielsen coincidence theory for maps between manifolds of same dimension regardless of orientation. We use the definition of semi-index of a class, review the definition of defective classes, and study the occurrence of defective root classes. We prove a semi-index product formula for lifting maps and give conditions for the defective coincidence classes to be the only essential classes.

  7. Perspectives on a Whole Class Mindfulness Programme

    Science.gov (United States)

    Thomas, George; Atkinson, Cathy

    2017-01-01

    This study sought to establish pupil and teacher views about a six-hour, whole-class mindfulness programme called Paws.b. Pupil post-intervention focus groups and teacher semi-structured interviews were used to ascertain what was interesting and useful about Paws.b, and how it could be developed. Audio recordings were transcribed and thematically…

  8. World class manufacturing in metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2013-01-01

    Full Text Available World Class Manufacturing (WCM assumes increase of efficiency of the company by elimination of all the losses, wastage and dangers of safety. In ArcelorMittal the concept of WCM is implemented in particular enterprises within the capital group. In this publication the activities conducted in some of those enterprises are described.

  9. A new class of non-leaves

    CERN Document Server

    Souza, Fábio S

    2011-01-01

    We give examples of open smooth manifolds that cannot be leaves of any Riemannian foliation of arbitrary codimension on a compact manifold. We also present a new class of non-leaves of C^0 codimension one foliations, simply connected manifolds of dimension at least 5 that are non-periodic in homotopy, namely in their 2-dimensional homotopy groups.

  10. Measuring the Community in Online Classes

    Science.gov (United States)

    Rubin, Beth; Fernandes, Ronald

    2013-01-01

    This paper proposes both theoretical and empirical approaches to differentiating the community of inquiry (CoI) in online classes at individual and group levels. Following the example of research on organizational climate, it assesses the strength of shared perceptions of teaching presence, social presence, and cognitive presence. The paper…

  11. Out about class.

    Science.gov (United States)

    Walker, L; Sell, I

    2001-01-01

    ABSTRACT Lesbian activist Léonie Walker traces the evolution of her involvement in social change philanthropy and her work to bring together activists of diverse class and racial backgrounds. She shows how she was trained as an activist, discusses conscious and socially responsible ways to steward wealth, and gives voice to the seldom-heard experiences of LGBT people with inherited wealth. The co-founder of the Women Managing Wealth program at the Ms. Foundation and a board member of Astraea Lesbian Action Foundation, she has also developed and facilitated numerous Dismantling Classism workshops. In this article, she discusses the importance of, and ways of implementing, cross-class, cross-race dialogue that can further understanding among activists of different backgrounds.

  12. World Class Facilities Management

    DEFF Research Database (Denmark)

    Malmstrøm, Ole Emil; Jensen, Per Anker

    2013-01-01

    Alle der med entusiasme arbejder med Facilities Management drømmer om at levere World Class. DFM drømmer om at skabe rammer og baggrund for, at vi i Danmark kan bryste os at være blandt de førende på verdensplan. Her samles op på, hvor tæt vi er på at nå drømmemålet.......Alle der med entusiasme arbejder med Facilities Management drømmer om at levere World Class. DFM drømmer om at skabe rammer og baggrund for, at vi i Danmark kan bryste os at være blandt de førende på verdensplan. Her samles op på, hvor tæt vi er på at nå drømmemålet....

  13. Flexible Word Classes

    DEFF Research Database (Denmark)

    2013-01-01

    • First major publication on the phenomenon • Offers cross-linguistic, descriptive, and diverse theoretical approaches • Includes analysis of data from different language families and from lesser studied languages This book is the first major cross-linguistic study of 'flexible words', i.e. words...... that cannot be classified in terms of the traditional lexical categories Verb, Noun, Adjective or Adverb. Flexible words can - without special morphosyntactic marking - serve in functions for which other languages must employ members of two or more of the four traditional, 'specialised' word classes. Thus......, flexible words are underspecified for communicative functions like 'predicating' (verbal function), 'referring' (nominal function) or 'modifying' (a function typically associated with adjectives and e.g. manner adverbs). Even though linguists have been aware of flexible world classes for more than...

  14. World Class Facilities Management

    DEFF Research Database (Denmark)

    Malmstrøm, Ole Emil; Jensen, Per Anker

    2013-01-01

    Alle der med entusiasme arbejder med Facilities Management drømmer om at levere World Class. DFM drømmer om at skabe rammer og baggrund for, at vi i Danmark kan bryste os at være blandt de førende på verdensplan. Her samles op på, hvor tæt vi er på at nå drømmemålet.......Alle der med entusiasme arbejder med Facilities Management drømmer om at levere World Class. DFM drømmer om at skabe rammer og baggrund for, at vi i Danmark kan bryste os at være blandt de førende på verdensplan. Her samles op på, hvor tæt vi er på at nå drømmemålet....

  15. Pilot study of a targeted dance class for physical rehabilitation in children with cerebral palsy

    OpenAIRE

    Citlali López-Ortiz; Tara Egan; Gaebler-Spira, Deborah J.

    2016-01-01

    Introduction: This pilot study evaluates the effects of a targeted dance class utilizing classical ballet principles for rehabilitation of children with cerebral palsy on balance and upper extremity control. Methods: Twelve children with cerebral palsy (ages 7–15 years) with Gross Motor Function Classification scores II–IV participated in this study and were assigned to either a control group or targeted dance class group. Targeted dance class group participated in 1-h classes three times per...

  16. A Rising Consumer Class

    OpenAIRE

    Manish Sonthalia

    2010-01-01

    India has had two stages of growth, both related to consumption since 1947. The first was based on developing economic self sufficiency; the second on rising disposable income. It is now entering its third period of consumption growth which sees it entering the world stage as one of the largest consumers in the world. This paper explains the factors that are driving this dramatic shift from the emerging middle classes to the patterns of consumption and investment in India today.

  17. [Social classes and poverty].

    Science.gov (United States)

    Benach, Joan; Amable, Marcelo

    2004-05-01

    Social classes and poverty are two key social determinants fundamental to understand how disease and health inequalities are produced. During the 90's in Spain there has been a notable oscillation in the inequality and poverty levels, with an increase in the middle of the decade when new forms of social exclusion, high levels of unemployment and great difficulties in accessing the labour market, especially for those workers with less resources, emerged. Today society is still characterized by a clear social stratification and the existence of social classes with a predominance of high levels of unemployment and precarious jobs, and where poverty is an endemic social problem much worse than the EU average. To diminish health inequalities and to improve the quality of life will depend very much on the reduction of the poverty levels and the improvement of equal opportunities and quality of employment. To increase understanding of how social class and poverty affect public health, there is a need to improve the quality of both information and research, and furthermore planners and political decision makers must take into account those determinants when undertaking disease prevention and health promotion.

  18. Transitive conformal holonomy groups

    CERN Document Server

    Alt, Jesse

    2011-01-01

    For $(M,[g])$ a conformal manifold of signature $(p,q)$ and dimension at least three, the conformal holonomy group $\\mathrm{Hol}(M,[g]) \\subset O(p+1,q+1)$ is an invariant induced by the canonical Cartan geometry of $(M,[g])$. We give a description of all possible connected conformal holonomy groups which act transitively on the M\\"obius sphere $S^{p,q}$, the homogeneous model space for conformal structures of signature $(p,q)$. The main part of this description is a list of all such groups which also act irreducibly on $\\R^{p+1,q+1}$. For the rest, we show that they must be compact and act decomposably on $\\R^{p+1,q+1}$, in particular, by known facts about conformal holonomy the conformal class $[g]$ must contain a metric which is locally isometric to a so-called special Einstein product.

  19. Algebraic Groups

    DEFF Research Database (Denmark)

    2007-01-01

    The workshop continued a series of Oberwolfach meetings on algebraic groups, started in 1971 by Tonny Springer and Jacques Tits who both attended the present conference. This time, the organizers were Michel Brion, Jens Carsten Jantzen, and Raphaël Rouquier. During the last years, the subject...... of algebraic groups (in a broad sense) has seen important developments in several directions, also related to representation theory and algebraic geometry. The workshop aimed at presenting some of these developments in order to make them accessible to a "general audience" of algebraic group......-theorists, and to stimulate contacts between participants. Each of the first four days was dedicated to one area of research that has recently seen decisive progress: \\begin{itemize} \\item structure and classification of wonderful varieties, \\item finite reductive groups and character sheaves, \\item quantum cohomology...

  20. Group Grammar

    Science.gov (United States)

    Adams, Karen

    2015-01-01

    In this article Karen Adams demonstrates how to incorporate group grammar techniques into a classroom activity. In the activity, students practice using the target grammar to do something they naturally enjoy: learning about each other.

  1. 高职“异质分组合作”教学的反思研究──以南华工商学院大学英语大班授课教学实验为例%Introspection to "Heterogeneous Group Cooperation" in Higher Vocational Colleges: The Experiment with Large-Class College English Teaching in Nanhua College of Industry and Commerce

    Institute of Scientific and Technical Information of China (English)

    彭晓春

    2011-01-01

    高职大学英语大班授课教学质量堪忧,合作学习理论的引人似乎为此带来了契机。该文所示的"异质分组合作"教学实验结果显示,该教学方法能推动班级成绩提高,尤其是对低分段学生有一定促进作用。但是,实验班成绩的提高幅度不及其中一个控制班的事实也表明,该教学方法可能有其缺陷和适用范围,还需要做出反思和深入研究。%As to worrying teaching qualities on large-class College English learning in higher vocational education,cooperative Learning theory seems to bring in opportunities for the reform in this area.The teaching experiment of "heterogeneous group cooperation" shown in this paper indicates that this teaching method can promote class scores increase,especially for inferior students.On the other hand,the fact that the experimental class got lower scores than one of controlled classes makes clear that,this method may have its defects and applicable scopes,still need to rethink profoundly and make in-depth research.

  2. MUYANG GROUP

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    @@ With its headquarters in the historic city of Yangzhou,Jiangsu Muyang Group Co.,Ltd has since its founding in 1967 grown into a well-known group corporation whose activities cover research&development.project design,manufacturing,installation and services in a multitude of industries including feed machinery and engineering,storage engineering,grain machinery and engineering,environmental protection,conveying equipment and automatic control systems.

  3. The Latin American Middle Class: Fragile After All?

    OpenAIRE

    Castellani, Francesca; Parent, Gwenn; Zentero, Jannet

    2014-01-01

    This paper joins in the debate on the size of the middle class in Latin America, providing an analysis of its structure and characteristics. Using several measurements, it finds that 40-60 percent of Latin American households are middle class, a share which has consolidated over the past decade. The analysis reveals that gender, age, and education are associated with the likelihood of being middle class. The example of Colombia illustrates that, while growing in size, this income group still ...

  4. Education, class and vernacular awareness on Tyneside

    DEFF Research Database (Denmark)

    Jensen, Marie Møller

    2017-01-01

    This chapter reports on a questionnaire study investigating Tyneside residents’ vernacular awareness and attested language use. Participant performance is interpreted on the basis of a cross-tabulation of participants’ social class as determined by their level of education and participants’ own....... This group consisted of mainly older female speakers and results are interpreted in light of first wave studies on the patterning of language use by class, age and gender. Finally, the issue of vernacular awareness is linked to social indexicality and it is suggested that an interpretation of participants...

  5. Class Action and Class Settlement in a European Perspective

    DEFF Research Database (Denmark)

    Werlauff, Erik

    2013-01-01

    The article analyses the options for introducing common European rules on class action lawsuits with an opt-out-model in individual cases. An analysis is made of how the risks of misuse of class actions can be prevented. The article considers the Dutch rules on class settlements (the WCAM procedure...

  6. Finite Symplectic Matrix Groups

    OpenAIRE

    2011-01-01

    The finite subgroups of GL(m, Q) are those subgroups that fix a full lattice in Q^m together with some positive definite symmetric form. A subgroup of GL(m, Q) is called symplectic, if it fixes a nondegenerate skewsymmetric form. Such groups only exist if m is even. A symplectic subgroup of GL(2n, Q) is called maximal finite symplectic if it is not properly contained in some finite symplectic subgroup of GL(2n, Q). This thesis classifies all conjugacy classes of maximal finite symplectic subg...

  7. The Leading Role and the Exemplary Role of Communist Party Branch for Students in Universities in the Class Group Construction and the Construction of Academic Atmosphere%学生党支部在班团建设和校风学风建设中的引领作用和示范作用研究

    Institute of Scientific and Technical Information of China (English)

    王春英

    2016-01-01

    Construction of Communist Party for students in universities is an important part of college communist party construc-tion.The communist party branch for students in universities should be based on the students group and focus on class construc-tion and the training of active applicants for Communist Party of China membership,giving full play a leading role in the con-struction of academic atmosphere.We plan to carry on the work from the following aspects:conducting collectivism education, unifying thought and understanding,establishing harmonious interpersonal relationship building scientific management system, training student cadres.%高校学生党建工作是高校党建工作的重要组成部分,高校学生党支部应该立足于学生群体,以班集体建设和入党积极分子培养为支部工作的两个抓手,充分发挥学生党支部在班团建设和校风学风建设中的引领作用和示范作用。具体在集体主义教育、统一思想认识、和谐人际关系、科学管理制度、培养学生干部等几个方面开展工作。

  8. Social class and body weight among Chinese urban adults: the role of the middle classes in the nutrition transition.

    Science.gov (United States)

    Bonnefond, Céline; Clément, Matthieu

    2014-07-01

    While a plethoric empirical literature addresses the relationship between socio-economic status and body weight, little is known about the influence of social class on nutritional outcomes, particularly in developing countries. The purpose of this article is to contribute to the analysis of the social determinants of adult body weight in urban China by taking into account the influence of social class. More specifically, we propose to analyse the position of the Chinese urban middle class in terms of being overweight or obese. The empirical investigations conducted as part of this research are based on a sample of 1320 households and 2841 adults from the China Health and Nutrition Survey for 2009. For the first step, we combine an economic approach and a sociological approach to identify social classes at household level. First, households with an annual per capita income between 10,000 Yuan and the 95th income percentile are considered as members of the middle class. Second, we strengthen the characterization of the middle class using information on education and employment. By applying clustering methods, we identify four groups: the elderly and inactive middle class, the old middle class, the lower middle class and the new middle class. For the second step, we implement an econometric analysis to assess the influence of social class on adult body mass index and on the probability of being overweight or obese. We use multinomial treatment regressions to deal with the endogeneity of the social class variable. Our results show that among the four subgroups of the urban middle class, the new middle class is the only one to be relatively well-protected against obesity. We suggest that this group plays a special role in adopting healthier food consumption habits and seems to be at a more advanced stage of the nutrition transition. Copyright © 2014 Elsevier Ltd. All rights reserved.

  9. Anomalia de Classe III

    OpenAIRE

    2014-01-01

    Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária Introdução: A anomalia de classe III, é uma má oclusão que afeta os indivíduos psicologicamente, pois hoje em dia, a estética é socialmente valorizada. Deste modo, o diagnóstico deve ser executado precocemente para que os indivíduos portadores desta anomalia, possam ser acompanhados desde criança, pelos profissionais área da Medicina...

  10. 7 CFR 30.43 - Class 8; Foreign-grown cigar-leaf types.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Class 8; Foreign-grown cigar-leaf types. 30.43 Section... CONTAINER REGULATIONS TOBACCO STOCKS AND STANDARDS Classification of Leaf Tobacco Covering Classes, Types and Groups of Grades § 30.43 Class 8; Foreign-grown cigar-leaf types. No group divisions...

  11. The Teacher as Leader: Effect of Teaching Behaviors on Class Community and Agreement

    Science.gov (United States)

    Rubin, Beth; Fernandes, Ronald

    2013-01-01

    This article examines the effects of teaching behaviors in online university classes, focusing on the agreement among class members. Literature on group leaders' effects on group agreement about workplace climate is reviewed. Hypotheses are generated about the effects that teachers of online courses, as class leaders, have on both the level and…

  12. Group Anonymity

    CERN Document Server

    Chertov, Oleg; 10.1007/978-3-642-14058-7_61

    2010-01-01

    In recent years the amount of digital data in the world has risen immensely. But, the more information exists, the greater is the possibility of its unwanted disclosure. Thus, the data privacy protection has become a pressing problem of the present time. The task of individual privacy-preserving is being thoroughly studied nowadays. At the same time, the problem of statistical disclosure control for collective (or group) data is still open. In this paper we propose an effective and relatively simple (wavelet-based) way to provide group anonymity in collective data. We also provide a real-life example to illustrate the method.

  13. Optimal Iterated Two-Class Separation in Hyperspectral Data

    DEFF Research Database (Denmark)

    Nielsen, Allan Aasbjerg; Müller, Andreas

    This paper gives an iterated extension of canonical discriminant analysis (CDA) for separation between two groups or classes in multi- or hypervariate data. We show that the iterative extension greatly enhances the separation between classes in a case with 110-band HyMap data covering part of the...

  14. Quantum classifying spaces and universal quantum characteristic classes

    CERN Document Server

    Durdevic, M

    1996-01-01

    A construction of the noncommutative-geometric counterparts of classical classifying spaces is presented, for general compact matrix quantum structure groups. A quantum analogue of the classical concept of the classifying map is introduced and analyzed. Interrelations with the abstract algebraic theory of quantum characteristic classes are discussed. Various non-equivalent approaches to defining universal characteristic classes are outlined.

  15. Finite Groups with Its Power Automorphism Groups Having Small Indices

    Institute of Scientific and Technical Information of China (English)

    Jun Xin WANG; Xiu Yun GUO

    2009-01-01

    In this paper,a finite group G with|Aut(G) : P(G)| = p or pq is determined,where P(G)is the power automorphism group of G,and p,q are distinct primes.Especially,we prove that a finite group G satisfies |Aut(G) : P(G)| = pq if and only if Aut(G)/P(G) (≈)S3.Also,some other classes of finite groups are investigated and classified,which are necessary for the proof of our main results.

  16. Reconciling Virtual Classes with Genericity

    DEFF Research Database (Denmark)

    Ernst, Erik

    2006-01-01

    classes. As a result, a kind of type parameters have been introduced, but they are simple and only used where they excel. Conversely, final definitions of virtual classes have been re- moved from the language, thus making virtual classes more flexible. The result- ing language presents a clearer and more...

  17. Understanding Class in Contemporary Societies

    DEFF Research Database (Denmark)

    Harrits, Gitte Sommer

    2007-01-01

    In this paper, I argue that claims about the death of class and the coming of the classless society are premature. Such claims are seldom genuinely empirical, and the theoretical argument often refers to a simple and therefore easily dismissible concept of class. By rejecting the concept of class...

  18. Informal groups

    NARCIS (Netherlands)

    E. van den Berg; P. van Houwelingen; J. de Hart

    2011-01-01

    Original title: Informele groepen Going out running with a group of friends, rather than joining an official sports club. Individuals who decide to take action themselves rather than giving money to good causes. Maintaining contact with others not as a member of an association, but through an Inter

  19. Researcher perspectives on class size reduction.

    Directory of Open Access Journals (Sweden)

    Elizabeth Graue

    2009-05-01

    Full Text Available This article applies to class size research Grant and Graue’s (1999 position that reviews of research represent conversations in the academic community. By extending our understanding of the class size reduction conversation beyond published literature to the perspectives of researchers who have studied the topic, we create a review that includes political histories of, contextual details about, and assumptions undergirding the conversation. We find divergent (and sometimes competing perspectives on identifying beneficiaries of class size reduction (or CSR and the correct context in which to view CSR research. By contrasting the logic and assumptions embedded in pupil-teacher ratio (PTR, class size (CS, and class size reduction studies, we conclude that sometimes research conflates these constructs and their associated theories of action, and such distortion poorly serves the needs of policymakers and stakeholders in education. We recommend that future inquiry focus on mechanisms of change, particularly instruction—both in terms of instructional strategies that capitalize on the resource of a smaller group and the types of support needed for teacher and administrator professional development.

  20. Characteristic Classes and Integrable Systems

    CERN Document Server

    Levin, A; Smirnov, A; Zotov, A

    2010-01-01

    The classical Calogero-Moser (CM) system related to a simple Lie group $G$ can be described as the Hitchin system coming from a topologically trivial Higgs $G$-bundle. We consider topologically non-trivial Higgs bundles and construct corresponding integrable systems. We call them the modified Calogero-Moser systems (MCM systems). Their phase space has the same dimension as the phase space of the standard CM systems with spin, but have less number of particles but greater number of the spin variables. Topology of the underlying holomorphic bundles are defined by their characteristic classes. Such bundles occur if $G$ has a non-trivial center, i.e. classical simply-connected groups, $E_6$ and $E_7$. Starting with these bundles we construct new integrable systems, their Lax operators, quadratic Hamiltonians, define the phase spaces and the Poisson structure using dynamical r-matrices. To describe the systems we construct a special basis in the Lie algebras that generalizes the basis of t'Hooft matrices for sl(N)...

  1. A retrospective study of Class II mixed-dentition treatment.

    Science.gov (United States)

    Oh, Heesoo; Baumrind, Sheldon; Korn, Edward L; Dugoni, Steven; Boero, Roger; Aubert, Maryse; Boyd, Robert

    2017-01-01

    To consider the effectiveness of early treatment using one mixed-dentition approach to the correction of moderate and severe Class II malocclusions. Three groups of Class II subjects were included in this retrospective study: an early treatment (EarlyTx) group that first presented at age 7 to 9.5 years (n = 54), a late treatment (LateTx) group whose first orthodontic visit occurred between ages 12 and 15 (n = 58), and an untreated Class II (UnTx) group to assess the pretreatment comparability of the two treated groups (n = 51). Thirteen conventional cephalometric measurements were reported for each group and Class II molar severity was measured on the study casts of the EarlyTx and LateTx groups. Successful Class II correction was observed in approximately three quarters of both the EarlyTx group and the LateTx group at the end of treatment. EarlyTx patients had fewer permanent teeth extracted than did the LateTx patients (5.6% vs 37.9%, P < .001) and spent less time in full-bonded appliance therapy in the permanent dentition than did LateTx patients (1.7 ± 0.8 vs 2.6 ± 0.7years, P < .001). When supervision time is included, the EarlyTx group had longer total treatment time and averaged more visits than did the LateTx group (53.1 ± 18. 8 vs 33.7 ± 8.3, P < .0001). Fifty-five percent of the LateTx extraction cases involved removal of the maxillary first premolars only and were finished in a Class II molar relationship. EarlyTx comprehensive mixed-dentition treatment was an effective modality for early correction of Class II malocclusions.

  2. Gauged supergravities from Bianchi's group manifolds

    NARCIS (Netherlands)

    Bergshoeff, E; Gran, U; Linares, R; Nielsen, M; Ortin, T; Roest, D

    2004-01-01

    We construct maximal D = 8 gauged supergravities by the reduction of D = I I supergravity over three-dimensional group manifolds. Such manifolds are classified into two classes, A and B, and eleven types. This Bianchi classification carries over to the gauged supergravities. The class A theories hav

  3. Abstract commensurators of braid groups

    OpenAIRE

    Leininger, Christopher J; Margalit, Dan

    2005-01-01

    Let B_n be the braid group on n strands, with n at least 4, and let Mod(S) be the extended mapping class group of the sphere with n+1 punctures. We show that the abstract commensurator of B_n is isomorphic to a semidirect product of Mod(S) with a group we refer to as the transvection subgroup, Tv(B_n). We also show that Tv(B_n) is itself isomorphic to a semidirect product of an infinite dimensional rational vector space with the multiplicative group of nonzero rational numbers.

  4. Hirzebruch classes of complex hypersurfaces

    CERN Document Server

    Cappell, Sylvain E; Schuermann, Joerg; Shaneson, Julius L

    2009-01-01

    The Milnor-Hirzebruch class of a locally complete intersection X in an algebraic manifold M measures the difference between the (Poincare dual of the) Hirzebruch class of the virtual tangent bundle of X and, respectively, the Brasselet-Schuermann-Yokura (homology) Hirzebruch class of X. In this note, we calculate the Milnor-Hirzebruch class of a globally defined algebraic hypersurface X in terms of the corresponding Hirzebruch invariants of singular strata in a Whitney stratification of X. Our approach is based on Schuermann's specialization property for the motivic Hirzebruch class transformation of Brasselet-Schuermann-Yokura.

  5. COMMUNICATIONS GROUP

    CERN Multimedia

    L. Taylor

    2011-01-01

    The CMS Communications Group, established at the start of 2010, has been busy in all three areas of its responsibility: (1) Communications Infrastructure, (2) Information Systems, and (3) Outreach and Education. Communications Infrastructure There are now 55 CMS Centres worldwide that are well used by physicists working on remote CMS shifts, Computing operations, data quality monitoring, data analysis and outreach. The CMS Centre@CERN in Meyrin, is the centre of the CMS offline and computing operations, hosting dedicated analysis efforts such as during the CMS Heavy Ion lead-lead running. With a majority of CMS sub-detectors now operating in a “shifterless” mode, many monitoring operations are now routinely performed from there, rather than in the main Control Room at P5. The CMS Communications Group, CERN IT and the EVO team are providing excellent videoconferencing support for the rapidly-increasing number of CMS meetings. In parallel, CERN IT and ...

  6. Lego Group

    DEFF Research Database (Denmark)

    Møller Larsen, Marcus; Pedersen, Torben; Slepniov, Dmitrij

    2010-01-01

    The last years’ rather adventurous journey from 2004 to 2009 had taught the fifth-largest toy-maker in the world - the LEGO Group - the importance of managing the global supply chain effectively. In order to survive the largest internal financial crisis in its roughly 70 years of existence......, the management had, among many initiatives, decided to offshore and outsource a major chunk of its production to Flextronics. In this pursuit of rapid cost-cutting sourcing advantages, the LEGO Group planned to license out as much as 80 per cent of its production besides closing down major parts...... of the production in high cost countries. Confident with the prospects of the new partnership, the company signed a long-term contract with Flextronics. This decision eventually proved itself to have been too hasty, however. Merely three years after the contracts were signed, LEGO management announced that it would...

  7. Group play

    DEFF Research Database (Denmark)

    Tychsen, Anders; Hitchens, Michael; Brolund, Thea

    2008-01-01

    of group dynamics, the influence of the fictional game characters and the comparative play experience between the two formats. The results indicate that group dynamics and the relationship between the players and their digital characters, are integral to the quality of the gaming experience in multiplayer......Role-playing games (RPGs) are a well-known game form, existing in a number of formats, including tabletop, live action, and various digital forms. Despite their popularity, empirical studies of these games are relatively rare. In particular there have been few examinations of the effects...... of the various formats used by RPGs on the gaming experience. This article presents the results of an empirical study, examining how multi-player tabletop RPGs are affected as they are ported to the digital medium. Issues examined include the use of disposition assessments to predict play experience, the effect...

  8. ASYMPTOTIC SOLUTION TO MODEL FOR A CLASS OF VIRUS TRANSMISSION

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In this paper, a class of HIV virus transmission is considered. The transmissive dynamic model for the HIV virus is described. Using the functional-variational iteration theory, the rule for human group in the epidemic transmissive area is studied.

  9. A Note on Two Camina's Theorems on Conjugacy Class Sizes

    Indian Academy of Sciences (India)

    Qingjun Kong

    2010-04-01

    Let be a finite group. We mainly investigate how certain arithmetical conditions on conjugacy class sizes of some elements of biprimary order of influence the structure of . Some known results are generalized.

  10. Class Attendance in Undergraduate Classes: Why and When Do Students Miss Classes?

    Science.gov (United States)

    Van Blerkom, Malcolm L.

    The first part of this study examined class attendance of 959 students in 17 sections of undergraduate psychology classes. It was found that class attendance decreased from the beginning to the end of the semester. An investigation of 117 of the students found that attendance displayed moderate correlations with course grades. Students missed…

  11. Class Discovery in Galaxy Classification

    CERN Document Server

    Bazell, D; Bazell, David; Miller, David J.

    2004-01-01

    In recent years, automated, supervised classification techniques have been fruitfully applied to labeling and organizing large astronomical databases. These methods require off-line classifier training, based on labeled examples from each of the (known) object classes. In practice, only a small batch of labeled examples, hand-labeled by a human expert, may be available for training. Moreover, there may be no labeled examples for some classes present in the data, i.e. the database may contain several unknown classes. Unknown classes may be present due to 1) uncertainty in or lack of knowledge of the measurement process, 2) an inability to adequately ``survey'' a massive database to assess its content (classes), and/or 3) an incomplete scientific hypothesis. In recent work, new class discovery in mixed labeled/unlabeled data was formally posed, with a proposed solution based on mixture models. In this work we investigate this approach, propose a competing technique suitable for class discovery in neural network...

  12. Propagating Class and Method Combination

    DEFF Research Database (Denmark)

    Ernst, Erik

    1999-01-01

    This paper presents a mixin based class and method combination mechanism with block structure propagation. Traditionally, mixins can be composed to form new classes, possibly merging the implementations of methods (as in CLOS). In our approach, a class or method combination operation may cause any...... number of implicit combinations. For example, it is possible to specify separate aspects of a family of classes, and then combine several aspects into a full-fledged class family. The combination expressions would explicitly combine whole-family aspects, and by propagation implicitly combine the aspects...... for each member of the class family, and again by propagation implicitly compose each method from its aspects. As opposed to CLOS, this is type-checked statically; and as opposed to other systems for advanced class combination/ merging/weaving, it is integrated directly in the language, ensuring a clear...

  13. Pseudo Class III malocclusion.

    Science.gov (United States)

    Al-Hummayani, Fadia M

    2016-04-01

    The treatment of deep anterior crossbite is technically challenging due to the difficulty of placing traditional brackets with fixed appliances. This case report represents a none traditional treatment modality to treat deep anterior crossbite in an adult pseudo class III malocclusion complicated by severely retruded, supraerupted upper and lower incisors. Treatment was carried out in 2 phases. Phase I treatment was performed by removable appliance "modified Hawley appliance with inverted labial bow," some modifications were carried out to it to suit the presented case. Positive overbite and overjet was accomplished in one month, in this phase with minimal forces exerted on the lower incisors. Whereas, phase II treatment was performed with fixed appliances (braces) to align teeth and have proper over bite and overjet and to close posterior open bite, this phase was accomplished within 11 month.

  14. Structure of group invariants of a quasiperiodic flow

    Directory of Open Access Journals (Sweden)

    Lennard F. Bakker

    2004-03-01

    Full Text Available It is shown that the multiplier representation of the generalized symmetry group of a quasiperiodic flow induces a semidirect product structure on certain group invariants (including the generalized symmetry group of the flow's smooth conjugacy class.

  15. Group Connections: Whole Group Teaching.

    Science.gov (United States)

    Griffiths, Dorothy

    2002-01-01

    A learner-centered approach to adult group instruction involved learners in investigating 20th-century events. The approach allowed learners to concentrate on different activities according to their abilities and gave them opportunities to develop basic skills and practice teamwork. (SK)

  16. Network class superposition analyses.

    Directory of Open Access Journals (Sweden)

    Carl A B Pearson

    Full Text Available Networks are often used to understand a whole system by modeling the interactions among its pieces. Examples include biomolecules in a cell interacting to provide some primary function, or species in an environment forming a stable community. However, these interactions are often unknown; instead, the pieces' dynamic states are known, and network structure must be inferred. Because observed function may be explained by many different networks (e.g., ≈ 10(30 for the yeast cell cycle process, considering dynamics beyond this primary function means picking a single network or suitable sample: measuring over all networks exhibiting the primary function is computationally infeasible. We circumvent that obstacle by calculating the network class ensemble. We represent the ensemble by a stochastic matrix T, which is a transition-by-transition superposition of the system dynamics for each member of the class. We present concrete results for T derived from boolean time series dynamics on networks obeying the Strong Inhibition rule, by applying T to several traditional questions about network dynamics. We show that the distribution of the number of point attractors can be accurately estimated with T. We show how to generate Derrida plots based on T. We show that T-based Shannon entropy outperforms other methods at selecting experiments to further narrow the network structure. We also outline an experimental test of predictions based on T. We motivate all of these results in terms of a popular molecular biology boolean network model for the yeast cell cycle, but the methods and analyses we introduce are general. We conclude with open questions for T, for example, application to other models, computational considerations when scaling up to larger systems, and other potential analyses.

  17. The Influence of Teachers on English Learning in“Neichu”Class

    Institute of Scientific and Technical Information of China (English)

    刘秋利

    2013-01-01

    Although researches on the influence of teachers in class and after class have a long history both at home and abroad,few researches care about such a special group of“Neichu”class. 240 students from two“Neichu”classes and two common classes in No.66 Middle School in Urumqi are collected as the target students. Based on the previous research achievements,the questionnaire and interviews are used to measure and analyze teachers’influence on students’English learning. After the collection and analysis of questionnaire,the results show that there exists significant difference in teachers’influence between“Neichu”class and common class.

  18. Challenging the Black Church Narrative: Race, Class, and Homosexual Attitudes.

    Science.gov (United States)

    Irizarry, Yasmiyn A; Perry, Ravi K

    2017-08-11

    In recent years, scholars have pointed to the Black church as the driving force behind Blacks' more conservative lesbian, gay, bisexual, and transgendered (LGBT) attitudes. Although evidence suggests a robust association between religiosity and LGBT attitudes, contemporary scholarship has not examined the role of class or the extent to which religiosity actually explains these trends. Using the 2004-2014 waves of the General Social Survey, we find that class moderates in the effect of race on negative LGBT attitudes, resulting in a noticeably larger gap between middle-class Blacks and Whites than in the top or the bottom of the class distribution. Although religiosity and moralization explain a portion of racial differences in homosexual attitudes across class groups, we find that neither fully accounts for the more conservative attitudes of the Black middle class. We conclude by discussing the shortcomings of these narratives for understanding Blacks' more conservative LGBT attitudes.

  19. Disability, disparate impact, and class actions.

    Science.gov (United States)

    Stein, Michael Ashley; Waterstone, Michael E

    2006-12-01

    Following Title VII's enactment, group-based employment discrimination actions flourished due to disparate impact theory and the class action device. Courts recognized that subordination that defined a group's social identity was also sufficient legally to bind members together, even when relief had to be issued individually. Woven through these cases was a notion of panethnicity that united inherently unrelated groups into a common identity, for example, Asian Americans. Stringent judicial interpretation subsequently eroded both legal frameworks and it has become increasingly difficult to assert collective employment actions, even against discriminatory practices affecting an entire group. This deconstruction has immensely disadvantaged persons with disabilities. Under the Americans with Disabilities Act (ADA), individual employee claims to accommodate specific impairments, such as whether to install ramps or replace computer screens, have all but eclipsed a coherent theory of disability-based disparate impact law. Moreover, the class action device has been virtually nonexistent in disability discrimination employment cases. The absence of collective action has been especially harmful because the realm of the workplace is precisely where group-based remedies are needed most. Specifically, a crucial but overlooked issue in disability integration is the harder-to-reach embedded norms that require job and policy modifications. The Article argues that pandisability theory serves as an analogue to earlier notions of panethnicity and provides an equally compelling heuristic for determining class identity. It shows that pandisability undergirds ADA public service and public accommodation class actions in which individualized remedy assessments have been accepted as part of group-based challenges to social exclusion. The Article also demonstrates that this broader vision of collective action is consistent with the history underlying the class action device. Taking

  20. On minimal artinian modules and minimal artinian linear groups

    Directory of Open Access Journals (Sweden)

    Leonid A. Kurdachenko

    2001-01-01

    minimal artinian linear groups. The authors prove that in such classes of groups as hypercentral groups (so also, nilpotent and abelian groups and FC-groups, minimal artinian linear groups have precisely the same structure as the corresponding irreducible linear groups.

  1. Positions of characters in finite groups and the Taketa inequality

    DEFF Research Database (Denmark)

    Kildetoft, Tobias

    We define the position of an irreducible complex character of a finite group as an analogue of the degree. We then use this to define three classes of groups: PR-groups, IPR-groups and weak IPR-groups. We show that IPR-groups and weak IPR-groups are solvable and satisfy the Taketa inequality (ie...

  2. Using Telestrations™ to Illustrate Small Group Communication Principles

    Science.gov (United States)

    Fedesco, Heather Noel

    2014-01-01

    This single class activity described here: (1) illustrates the importance of interdependence in groups; (2) can be used to measure group productivity and performance; (3) can encourage groups to engage in group learning; and (4) can facilitate group cohesion for newly formed groups. Students will be working in groups for the majority of their…

  3. Using Telestrations™ to Illustrate Small Group Communication Principles

    Science.gov (United States)

    Fedesco, Heather Noel

    2014-01-01

    This single class activity described here: (1) illustrates the importance of interdependence in groups; (2) can be used to measure group productivity and performance; (3) can encourage groups to engage in group learning; and (4) can facilitate group cohesion for newly formed groups. Students will be working in groups for the majority of their…

  4. Spatial segmentation and the black middle class.

    Science.gov (United States)

    Sharkey, Patrick

    2014-01-01

    Ethnographic studies of the black middle class focus attention on the ways in which residential environments condition the experiences of different segments of the black class structure. This study places these arguments in a larger demographic context by providing a national analysis of neighborhood inequality and spatial inequality of different racial and ethnic groups in urban America. The findings show that there has been no change over time in the degree to which majority-black neighborhoods are surrounded by spatial disadvantage. Predominantly black neighborhoods, regardless of socioeconomic composition, continue to be spatially linked with areas of severe disadvantage. However, there has been substantial change in the degree to which middle- and upper-income African-American households have separated themselves from highly disadvantaged neighborhoods. These changes are driven primarily by the growing segment of middle- and upper-income African-Americans living in neighborhoods in which they are not the majority group, both in central cities and in suburbs.

  5. On General Fibonacci Sequences in Groups

    OpenAIRE

    Özkan, Engin

    2003-01-01

    In this paper, we have constituted 3-step general Fibonacci sequences in a nilpotent group with exponent p (p is a prime number) and nilpotency class 4 and given formulas to find the a term of the sequence.

  6. Class Action and Class Settlement in a European Perspective

    DEFF Research Database (Denmark)

    Werlauff, Erik

    2013-01-01

    The article analyses the options for introducing common European rules on class action lawsuits with an opt-out-model in individual cases. An analysis is made of how the risks of misuse of class actions can be prevented. The article considers the Dutch rules on class settlements (the WCAM procedure......) and the advantage of integrating equivalent rules into a European rule set. The Danish rules, which have now been in effect for some years, are then considered....

  7. COMMUNICATIONS GROUP

    CERN Multimedia

    L. Taylor

    2011-01-01

    The CMS Communications Group has been busy in all three areas of its responsibility: (1) Communications Infrastructure, (2) Information Systems, and (3) Outreach and Education. Communications Infrastructure The 55 CMS Centres worldwide are well used by physicists working on remote CMS shifts, Computing operations, data quality monitoring, data analysis and outreach. The CMS Centre@CERN in Meyrin, is the centre of the CMS Offline and Computing operations, and a number of subdetector shifts can now take place there, rather than in the main Control Room at P5. A new CMS meeting room has been equipped for videoconferencing in building 42, next to building 40. Our building 28 meeting room and the facilities at P5 will be refurbished soon and plans are underway to steadily upgrade the ageing equipment in all 15 CMS meeting rooms at CERN. The CMS evaluation of the Vidyo tool indicates that it is not yet ready to be considered as a potential replacement for EVO. The Communications Group provides the CMS-TV (web) cha...

  8. COMMUNICATIONS GROUP

    CERN Multimedia

    L. Taylor

    2010-01-01

    The CMS Communications Group, established at the start of 2010, has been strengthening the activities in all three areas of its responsibility: (1) Communications Infrastructure, (2) Information Systems, and (3) Outreach and Education. Communications Infrastructure The Communications Group has invested a lot of effort to support the operations needs of CMS. Hence, the CMS Centres where physicists work on remote CMS shifts, Data Quality Monitoring, and Data Analysis are running very smoothly. There are now 55 CMS Centres worldwide, up from just 16 at the start of CMS data-taking. The latest to join are Imperial College London, the University of Iowa, and the Università di Napoli. The CMS Centre@CERN in Meyrin, which is now full repaired after the major flooding at the beginning of the year, has been at the centre of CMS offline and computing operations, most recently hosting a large fraction of the CMS Heavy Ion community during the lead-lead run. A number of sub-detector shifts can now take pla...

  9. The Finite Lamplighter Groups: A Guided Tour

    Science.gov (United States)

    Siehler, Jacob A.

    2012-01-01

    In this article, we present a family of finite groups, which provide excellent examples of the basic concepts of group theory. To work out the center, conjuagacy classes, and commutators of these groups, all that's required is a bit of linear algebra.

  10. Group Work in College English Teaching

    Institute of Scientific and Technical Information of China (English)

    潘爱琳

    2008-01-01

    <正>In order to realize the communicative function of English and reduce the disadvantages of large-class teaching,group work can be adopted to achieve the goal to some extent with its practical significance.This paper aims to illustrate the advantages of group work and some reflections on the real application of group work activities in teaching.

  11. The Finite Lamplighter Groups: A Guided Tour

    Science.gov (United States)

    Siehler, Jacob A.

    2012-01-01

    In this article, we present a family of finite groups, which provide excellent examples of the basic concepts of group theory. To work out the center, conjuagacy classes, and commutators of these groups, all that's required is a bit of linear algebra.

  12. Some more Non-arithmetic Rigid groups

    CERN Document Server

    Lubotzky, Alexander

    2011-01-01

    In "Non arithmetic super rigid groups: counter examples to Platonov's conjecture" Bass and Lubotzky gave a counter example to Platonov's conjecture by presenting an example of a linear group with super-rigidity which is not an arithmetic lattice. In this note, a much richer class of such groups is presented with a somewhat simpler proof.

  13. Hard tissue changes between extraction- and nonextraction- group in patients with skeletal Class Ⅲ malocclusion by orthognathic treatment%拔牙与非拔牙的骨性安氏Ⅲ类双颌手术前后的硬组织变化

    Institute of Scientific and Technical Information of China (English)

    张桦; 杜越英

    2011-01-01

    PURPOSE: The aim of this study was to evaluate the hard tissue changes between extraction - and nonextraction-group in patients with skeletal Class III malocclusion before and after orthognathic treatment. METHODS: Thirty-one patients with maxillary hypoplasia and mandibular prognathism were divided into two groups: a group that consisted of 15 cases with extraction of maxillary premolar and a group that consisted of 16 cases without extraction. All patients were performed maxillary Le Fort I osteotomy and sagittal split ramus osteotomy (SSRO). Data were collected from standardized lateral cephalometric radiographs taken at pretreatment(T1), preoperation(T2) and the completion of treatment (T3). Cephalometric analysis included 9 patients. The data were compared at T1,T2 and T3, respectively, with SAS8.02 software package for grouped t test. RESULTS: There was no significant difference in hard tissue morphology at T1, T2, T3 between extraction- and nonextraction- group(P>0.05), except upper alveolar anglar(UD-SN) at T1, overjet at T2, LIMP at T2 and T3(P<0.05). CONCLUSIONS: Before treatment, upper anterior alveroar bone in extraction group protruded more than nonextraction-group. By extraction and preoperative orthodontic treatment, protrusion was improved before orthognathic surgery. Decompensation of lower incisor in extraction group was greater than nonextraction-group by increasing reverse overjet. Supported by Program for Innovative Research Team of Shanghai Municipal Education Commission.%目的:探讨已行双颌手术的骨性安氏Ⅲ类错(牙合)患者治疗前、正颌手术前正畸后和治疗完成后拔与不拔上颌第一前磨牙的上、下颌骨硬组织结构差异.方法:研究对象为均已行上颌骨Le Fort Ⅰ型前移和下颌骨矢状劈开后退术的骨性安氏Ⅲ类错(牙合)畸形伴上颌骨发育不足和下颌骨发育过度的患者.研究对象被分成两组:术前正畸拔除上颌第一前磨牙组15例,未拔牙组16

  14. As condições e as experiências de vida de grupos populares no Rio de Janeiro: repensando a mobilização popular no controle do dengue Living conditions and life experiences of working-class groups in Rio de Janeiro: rethinking dengue control and popular mobilization

    Directory of Open Access Journals (Sweden)

    Rosely Magalhães de Oliveira

    2001-01-01

    Full Text Available Partindo do relato da experiência de mobilização popular durante a epidemia de dengue ocorrida no município do Rio de Janeiro, entre os anos de 1986 e 1991, o artigo busca apresentar e discutir o processo de investigação científica e assessoria popular em torno da situação de saneamento básico de grupos sociais vulneráveis. São apresentados resultados da investigação sobre o problema de abastecimento de água nas favelas da região, tendo como ponto de partida reclamações de seus representantes em fóruns locais de debate público da situação de saúde. A coleta e sistematização dos dados e informações analisados tiveram como base a "construção compartilhada do conhecimento", compreendida como uma produção onde se intercruzam o saber científico acumulado e o saber popular produzido a partir de condições e experiências de vida da população. Por fim, são efetuadas algumas considerações em torno da necessidade de estarmos atentos para as "técnicas locais" de defesa da vida e sua relação com os processos endêmico-epidêmicos.Using narratives of an experience with popular mobilization during the 1986-91 dengue epidemic in the city of Rio de Janeiro, the authors discuss the scientific research and technical counseling involving basic sanitation conditions for vulnerable social groups. They present research results on water distribution in the slums from the Leopoldina area of the city. The research stemmed from demands by community leaders at local forums discussing health conditions. Gathering, systematizing, and analyzing the data were based on what they call "shared knowledge construction", resulting by crossing accumulated scientific knowledge with popular knowledge produced as a result of living conditions and life experiences among working-class groups. Finally, the authors comment on the need for local health professionals to be aware of relationships between epidemic and endemic processes and protection

  15. The Formation of Effective Work Groups within an FE Classroom

    Science.gov (United States)

    Russell, Megan

    2010-01-01

    Fascinated by the diversity of composition in effective work groups in Further Education (FE) classrooms, I studied group formation and composition in level 3 Biology classes over an academic year. Using information from the class teacher, observers and students, the importance of effective work groups (defining effectiveness in terms of…

  16. Comparison of soft tissue facial morphometry in children with Class I and Class II occlusions.

    Science.gov (United States)

    Ferrario, V F; Sforza, C; Serrao, G; Puletto, S; Bignotto, M; Tartaglia, G

    1994-01-01

    Three-dimensional soft tissue facial morphometry was investigated in a sample of 167 children aged 6 to 9 years by using a new noninvasive computerized method. For each child, 16 cutaneous facial landmarks were automatically collected by a system consisting of two infrared CCD cameras, real-time hardware for the recognition of markers, and software for the three-dimensional reconstruction of the x, y, and z coordinates of landmarks. From these landmarks, 15 linear and 10 angular measurements and five linear distance ratios were computed. For each age class, mean values were computed for all children with a bilateral Angle Class I occlusion (modified according to Katz) and compared with values obtained in children with a bilateral Class II occlusion. Most of the differences involved three-dimensional angular measurements: Class II children had more convex faces in the sagittal plane and a less prominent mandible than did Class I children. No differences were found in the linear measurements. Only the lower facial height ratio was different between the two occlusion groups, but the difference was not consistent among all the age groups.

  17. Beauville Surfaces and Groups 2012

    CERN Document Server

    Garion, Shelly; Vdovina, Alina; Springer Proceedings in Mathematics & Statistics : Volume 123

    2015-01-01

    This collection of surveys and research articles explores a fascinating class of varieties: Beauville surfaces. It is the first time that these objects are discussed from the points of view of algebraic geometry as well as group theory. The book also includes various open problems and conjectures related to these surfaces. Beauville surfaces are a class of rigid regular surfaces of general type, which can be described in a purely algebraic combinatoric way. They play an important role in different fields of mathematics like algebraic geometry, group theory and number theory. The notion of Beauville surface was introduced by Fabrizio Catanese in 2000 and, after the first systematic study of these surfaces by Ingrid Bauer, Fabrizio Catanese and Fritz Grunewald, there has been an increasing interest in the subject. These proceedings reflect the topics of the lectures presented during the workshop ‘Beauville Surfaces and Groups 2012’, held at Newcastle University, UK in June 2012. This conference brought toge...

  18. Organizing MHC Class II Presentation

    Directory of Open Access Journals (Sweden)

    David R Fooksman

    2014-04-01

    Full Text Available Major histocompatibility complex (MHC class II molecules are ligands for CD4+ T cells and are critical for initiating the adaptive immune response. This review is focused on what is currently known about MHC class II organization at the plasma membrane of antigen presenting cells and how this affects antigen presentation to T cells. The organization and diffusion of class II molecules have been measured by a variety of biochemical and microscopic techniques. Membrane lipids and other proteins have been implicated in MHC class II organization and function. However, when compared with the organization of MHC class I or TCR complexes, much less is known about MHC class II. Since clustering of T cell receptors occurs during activation, the organization of MHC molecules prior to recognition and during synapse formation may be critical for antigen presentation.

  19. HeteroGenius Classes

    Science.gov (United States)

    Fiero, Alan

    2012-01-01

    "Science for all" is not just a theme that befits the democratic society. It also exemplifies the best methodology for teaching science to children at the middle school level. For many years, teachers have grappled with trying to determine what type of grouping would most benefit their students. This article presents a strategy that highlights why…

  20. The fundamental group of the orbit space

    Directory of Open Access Journals (Sweden)

    Hattab Hawete

    2015-12-01

    Full Text Available Let G be a subgroup of the group Homeo(X of homeomorphisms of a topological space X. Let G¯$\\bar G$ be the closure of G in Homeo(X. The class of an orbit O of G is the union of all orbits having the same closure as O. We denote by X/G˜$X/\\widetildeG$ the space of classes of orbits called the orbit class space. In this paper, we study the fundamental group of the spaces X/G, X/G¯$X/\\bar G$ and X/G˜$X/\\widetildeG$

  1. Weil classes on abelian varieties

    CERN Document Server

    Moonen, B J J; Zarhin, Yu. G.

    1996-01-01

    Consider a complex abelian variety X on which a field F acts. Generalizing a construction of A. Weil, one associates to this a subspace W_F of the cohomology of X, which we call the space of Weil classes w.r.t. F. The purpose of this paper is to answer the following two questions: Q1: under what conditions on F does the space W_F contain, or even consist of, Hodge classes?, Q2: if W_F contains Hodge classes, under what conditions on F are these exceptional? In case X is defined over a number field, we also answer the analogous questions for Tate classes.

  2. On uniqueness of characteristic classes

    DEFF Research Database (Denmark)

    Feliu, Elisenda

    2011-01-01

    We give an axiomatic characterization of maps from algebraic K-theory. The results apply to a large class of maps from algebraic K-theory to any suitable cohomology theory or to algebraic K-theory. In particular, we obtain comparison theorems for the Chern character and Chern classes and for the ......We give an axiomatic characterization of maps from algebraic K-theory. The results apply to a large class of maps from algebraic K-theory to any suitable cohomology theory or to algebraic K-theory. In particular, we obtain comparison theorems for the Chern character and Chern classes...

  3. Type Families with Class, Type Classes with Family

    DEFF Research Database (Denmark)

    Serrano, Alejandro; Hage, Jurriaan; Bahr, Patrick

    2015-01-01

    Type classes and type families are key ingredients in Haskell programming. Type classes were introduced to deal with ad-hoc polymorphism, although with the introduction of functional dependencies, their use expanded to type-level programming. Type families also allow encoding type-level functions...

  4. Existentially closed locally finite groups

    CERN Document Server

    Shelah, Saharon

    2011-01-01

    We investigate this class of groups originally called ulf (universal locally finite groups) of cardinality lambda . We prove that for every locally finite group G there is a canonical existentially closed extention of the same cardinality, unique up to isomorphism and increasing with G . Also we get, e.g. existence of complete members (i.e. with no non-inner automorphisms) in many cardinals (provably in ZFC). We also get a parallel to stability theory in the sense of investigating definable types.

  5. COMMUNICATIONS GROUP

    CERN Multimedia

    L. Taylor

    2011-01-01

    Communications Infrastructure The 55 CMS Centres worldwide are well used by physicists working on remote CMS shifts, Computing operations, data quality monitoring, data analysis and outreach. The CMS Centre@CERN in Meyrin is particularly busy at the moment, hosting about 50 physicists taking part in the heavy-ion data-taking and analysis. Three new CMS meeting room will be equipped for videoconferencing in early 2012: 40/5B-08, 42/R-031, and 28/S-029. The CMS-TV service showing LHC Page 1, CMS Page 1, etc. (http://cmsdoc.cern.ch/cmscc/projector/index.jsp) is now also available for mobile devices: http://cern.ch/mcmstv. Figure 12: Screenshots of CMS-TV for mobile devices Information Systems CMS has a new web site: (http://cern.ch/cms) using a modern web Content Management System to ensure content and links are managed and updated easily and coherently. It covers all CMS sub-projects and groups, replacing the iCMS internal pages. It also incorporates the existing CMS public web site (http:/...

  6. COMMUNICATIONS GROUP

    CERN Multimedia

    L. Taylor

    2012-01-01

      Outreach and Education We are fortunate that our research has captured the public imagination, even though this inevitably puts us under the global media spotlight, as we saw with the Higgs seminar at CERN in December, which had 110,000 distinct webcast viewers. The media interest was huge with 71 media organisations registering to come to CERN to cover the Higgs seminar, which was followed by a press briefing with the DG and Spokespersons. This event resulted in about 2,000 generally positive stories in the global media. For this seminar, the CMS Communications Group prepared up-to-date news and public material, including links to the CMS results, animations and event displays [http://cern.ch/go/Ch8thttp://cern.ch/go/Ch8t]. There were 44,000 page-views on the CMS public website, with the Higgs news article being by far the most popular item. CMS event displays from iSpy are fast becoming the iconic media images, featuring on numerous major news outlets (BBC, CNN, MSN...) as well as in the sci...

  7. COMMUNICATIONS GROUP

    CERN Multimedia

    L. Taylor

    2010-01-01

    The recently established CMS Communications Group, led by Lucas Taylor, has been busy in all three of its main are areas of responsibility: Communications Infrastructure, Information Systems, and Outreach and Education Communications Infrastructure The damage caused by the flooding of the CMS Centre@CERN on 21st December has been completely repaired and all systems are back in operation. Major repairs were made to the roofs, ceilings and one third of the floor had to be completely replaced. Throughout these works, the CMS Centre was kept operating and even hosted a major press event for first 7 TeV collisions, as described below. Incremental work behind the scenes is steadily improving the quality of the CMS communications infrastructure, particularly Webcasting, video conferencing, and meeting rooms at CERN. CERN/IT is also deploying a pilot service of a new videoconference tool called Vidyo, to assess whether it might provide an enhanced service at a lower cost, compared to the EVO tool currently in w...

  8. Modelling group dynamic animal movement

    DEFF Research Database (Denmark)

    Langrock, Roland; Hopcraft, J. Grant C.; Blackwell, Paul G.

    2014-01-01

    Group dynamic movement is a fundamental aspect of many species' movements. The need to adequately model individuals' interactions with other group members has been recognised, particularly in order to differentiate the role of social forces in individual movement from environmental factors. However......, to date, practical statistical methods which can include group dynamics in animal movement models have been lacking. We consider a flexible modelling framework that distinguishes a group-level model, describing the movement of the group's centre, and an individual-level model, such that each individual...... makes its movement decisions relative to the group centroid. The basic idea is framed within the flexible class of hidden Markov models, extending previous work on modelling animal movement by means of multi-state random walks. While in simulation experiments parameter estimators exhibit some bias...

  9. On the role of covarying functions in stimulus class formation and transfer of function.

    Science.gov (United States)

    Markham, Rebecca G; Markham, Michael R

    2002-11-01

    This experiment investigated whether directly trained covarying functions are necessary for stimulus class formation and transfer of function in humans. Initial class training was designed to establish two respondent-based stimulus classes by pairing two visual stimuli with shock and two other visual stimuli with no shock. Next, two operant discrimination functions were trained to one stimulus of each putative class. The no-shock group received the same training and testing in all phases, except no stimuli were ever paired with shock. The data indicated that skin conductance response conditioning did not occur for the shock groups or for the no-shock group. Tests showed transfer of the established discriminative functions, however, only for the shock groups, indicating the formation of two stimulus classes only for those participants who received respondent class training. The results suggest that transfer of function does not depend on first covarying the stimulus class functions.

  10. Latent Class Analysis of YBOCS Symptoms in Obsessive Compulsive Disorder

    Science.gov (United States)

    Delucchi, Kevin L.; Katerberg, Hilga; Stewart, S. Evelyn; Denys, Damiaan A.J.P.; Lochner, Christine; Stack, Denise E.; den Boer, Johan A.; van Balkom, Anton J.L.M.; Jenike, Michael A.; Stein, Dan J.; Cath, Danielle C.; Mathews, Carol A.

    2010-01-01

    Objective Obsessive-compulsive disorder (OCD) is phenomenologically heterogeneous, and findings of underlying structure classification based on symptom grouping have been ambiguous to date. Variable-centered approaches, primarily factor analysis, have been used to identify homogeneous groups of symptoms, but person-centered latent methods have seen little use. This study was designed to uncover sets of homogeneous groupings within 1611 individuals with OCD, based on symptoms. Method Latent class analysis (LCA) models using 61 obsessive-compulsive symptoms (OCS) collected from the Yale-Brown Obsessive-Compulsive Scale were fit. Relationships between latent class membership and treatment response, gender, symptom severity and comorbid tic disorders were tested for relationship to class membership. Results LCA models of best fit yielded three classes. Classes differed only in frequency of symptom endorsement. Classes with higher symptom endorsement were associated with earlier age of onset, being male, higher YBOCS symptom severity scores, and comorbid tic disorders. There were no differences in treatment response between classes. Conclusions These results provide support for the validity of a single underlying latent OCD construct, in addition to the distinct symptom factors identified previously via factor analyses. PMID:21145539

  11. Facilitating Learning in Large Lecture Classes: Testing the “Teaching Team” Approach to Peer Learning

    OpenAIRE

    Stanger-Hall, Kathrin F.; Lang, Sarah; Maas, Martha

    2010-01-01

    We tested the effect of voluntary peer-facilitated study groups on student learning in large introductory biology lecture classes. The peer facilitators (preceptors) were trained as part of a Teaching Team (faculty, graduate assistants, and preceptors) by faculty and Learning Center staff. Each preceptor offered one weekly study group to all students in the class. All individual study groups were similar in that they applied active-learning strategies to the class material, but they differed ...

  12. Translanguaging in a Reading Class

    Science.gov (United States)

    Vaish, Viniti; Subhan, Aidil

    2015-01-01

    Using translanguaging as a theoretical foundation, this paper analyses findings from a Grade 2 reading class for low achieving students, where Malay was used as a scaffold to teach English. Data come from one class in one school in Singapore and its Learning Support Programme (LSP), which is part of a larger research project on biliteracy. The LSP…

  13. Class Differences in Cohabitation Processes

    Science.gov (United States)

    Sassler, Sharon; Miller, Amanda J.

    2011-01-01

    Despite the burgeoning cohabitation literature, research has failed to examine social class variation in processes of forming and advancing such unions. Drawing upon in-depth interviews with 122 working- and middle-class cohabitors, we examine the duration between dating and moving in together, reasons for cohabiting, and subsequent plans.…

  14. Relations among tautological classes revisited

    DEFF Research Database (Denmark)

    Randal-Williams, Oscar

    2012-01-01

    We give a simple generalisation of a theorem of Morita (1989) [10] and [11], which leads to a great number of relations among tautological classes on moduli spaces of Riemann surfaces......We give a simple generalisation of a theorem of Morita (1989) [10] and [11], which leads to a great number of relations among tautological classes on moduli spaces of Riemann surfaces...

  15. Tautological Classes on Projective Towers

    CERN Document Server

    Negut, Andrei

    2011-01-01

    When one has a tower of projective bundles over an algebraic variety and wishes to compute the push-forward of any cohomology class down this tower, one needs to recursively compute the Segre classes corresponding to each level. In this paper, we give a closed combinatorial formula that encodes this recursive procedure.

  16. Ideas for Managing Large Classes.

    Science.gov (United States)

    Kabel, Robert L.

    1983-01-01

    Describes management strategies used in a large kinetics/industrial chemistry course. Strategies are designed to make instruction in such classes more efficient and effective. Areas addressed include homework assignment, quizzes, final examination, grading and feedback, and rewards for conducting the class in the manner described. (JN)

  17. Class, Identity, and Teacher Education

    Science.gov (United States)

    Van Galen, Jane A.

    2010-01-01

    This paper explores the possibilities of working with White, working-class teacher education students to explore the "complex social trajectory" (Reay in Women's Stud Int Forum 20(2):225-233, 1997a, p. 19) of class border crossing as they progress through college. Through analysis of a course that I have developed, "Education and the American…

  18. Making Large Classes More Interactive.

    Science.gov (United States)

    Brenner, John

    2000-01-01

    Describes the method of using prompts to allow students to have more "voice" in a large class. The prompt assignment requires students to respond anonymously to a statement that concerns the chapter being discussed in the class. Discusses how the Internet has allowed more freedom with the prompts. Puts forth some student responses to the…

  19. The Paradox of Paperless Classes.

    Science.gov (United States)

    Lackie, Paula

    1998-01-01

    Describes paperless classes developed at Carleton College that augment traditional classes by giving students and faculty the ability to share digital course-related materials via the campus computer network. Presents a case study of a managerial economics course, and includes problems with various aspects of the course and solutions. (LRW)

  20. Predicting Acoustics in Class Rooms

    DEFF Research Database (Denmark)

    Christensen, Claus Lynge; Rindel, Jens Holger

    2005-01-01

    Typical class rooms have fairly simple geometries, even so room acoustics in this type of room is difficult to predict using today's room acoustic computer modeling software. The reasons why acoustics of class rooms are harder to predict than acoustics of complicated concert halls might...

  1. Notes on absolute Hodge classes

    CERN Document Server

    Charles, François

    2011-01-01

    We survey the theory of absolute Hodge classes. The notes include a full proof of Deligne's theorem on absolute Hodge classes on abelian varieties as well as a discussion of other topics, such as the field of definition of Hodge loci and the Kuga-Satake construction.

  2. ADULT EDUCATION AND SOCIAL CLASS.

    Science.gov (United States)

    LONDON, JACK; AND OTHERS

    IDENTIFICATION OF SOME OF THE VARIABLES THAT ENCOURAGE OR DISCOURAGE PARTICIPATION IN ADULT EDUCATION AMONG MIDDLE-CLASS AND WORKING-CLASS MEN WAS THE BASIS FOR THIS STUDY. A COMMUNITY SURVEY WAS USED TO LOCATE A SAMPLE OF PARTICIPANTS AND NONPARTICIPANTS, AS WELL AS TO PROVIDE DESCRIPTIVE DATA ABOUT THE RATES OF PARTICIPATION. A MATCHED SAMPLE…

  3. Hyoid bone position and head posture comparison in skeletal Class I and Class II subjects: A retrospective cephalometric study

    Directory of Open Access Journals (Sweden)

    Pawankumar Dnyandeo Tekale

    2014-01-01

    Full Text Available Objective: The aim of the study was to investigate the hyoid bone position and the head posture using lateral cephalograms in subjects with skeletal Class I and skeletal Class II pattern and to investigate the gender differences. Materials and Methods: The study used lateral cephalograms of 40 subjects (20 skeletal Class I pattern; 20 skeletal Class II pattern. Lateral cephalograms were traced and analyzed for evaluation of the hyoid bone position and the head posture using 34 parameters. Independent sample t-test was performed to compare the differences between the two groups and between genders in each group. Statistical tests were performed using NCSS 2007 software (NCSST, Kaysville, Utah, USA. Results: The linear measurements between the hyoid bone (H and cervical spine (CV2ia, the nasion-sella line, palatal line nasion line, the anterior nasal spine (ANS to perpendicular projection of H on the NLP (NLP- Nasal Linear Projection (H-NLP/ANS as well as the posterior cranial points (Bo, Ar and S points were found to be less in skeletal Class II subjects. The measurement H-CV2ia was found to be less in males with skeletal Class I pattern and H-CV4ia was found to be less in males with skeletal Class II pattern. The natural head posture showed no significant gender differences. Conclusion: The position of hyoid bone was closer to the cervical vertebra horizontally in skeletal Class II subjects when compared with skeletal Class I subjects. In males, the hyoid bone position was closer to the cervical vertebra horizontally both in skeletal Class I and skeletal Class II subjects.

  4. Learning discriminative dictionary for group sparse representation.

    Science.gov (United States)

    Sun, Yubao; Liu, Qingshan; Tang, Jinhui; Tao, Dacheng

    2014-09-01

    In recent years, sparse representation has been widely used in object recognition applications. How to learn the dictionary is a key issue to sparse representation. A popular method is to use l1 norm as the sparsity measurement of representation coefficients for dictionary learning. However, the l1 norm treats each atom in the dictionary independently, so the learned dictionary cannot well capture the multisubspaces structural information of the data. In addition, the learned subdictionary for each class usually shares some common atoms, which weakens the discriminative ability of the reconstruction error of each subdictionary. This paper presents a new dictionary learning model to improve sparse representation for image classification, which targets at learning a class-specific subdictionary for each class and a common subdictionary shared by all classes. The model is composed of a discriminative fidelity, a weighted group sparse constraint, and a subdictionary incoherence term. The discriminative fidelity encourages each class-specific subdictionary to sparsely represent the samples in the corresponding class. The weighted group sparse constraint term aims at capturing the structural information of the data. The subdictionary incoherence term is to make all subdictionaries independent as much as possible. Because the common subdictionary represents features shared by all classes, we only use the reconstruction error of each class-specific subdictionary for classification. Extensive experiments are conducted on several public image databases, and the experimental results demonstrate the power of the proposed method, compared with the state-of-the-arts.

  5. Control Class Summaries and Control Class IV from April 1990

    Energy Technology Data Exchange (ETDEWEB)

    Wu, J.; /Fermilab

    1991-02-22

    The D0 cryogenic control system is a complicated system with many facets. Because of the large number and variety of features in the system, a series of ongoing control system training seminars, or control classes, were created in order to keep people up to date on the operation of the system. As of the writing of this engineering note, there have been four classes. The original lecture notes from each class can be found in the cryogenic control room at the D0 Assembly Building, or in the Co-op office. This note provides a summary of the first three control classes, and it includes the entire set of notes from the fourth class, which was held in April of 1990. This class was taught by Jeff Wendlandt and Dan Markley. Dan should be consulted for more complete explanations than those given in the notes. The notes are, in fact, more of a reference for someone who has some experience with the system, than they are a training manual. Most of the pages include pictures and printouts of different menus and functions, useful for finding details without searching through the actual program. In general, this note serves as a pointer to the existence of the control class lecture notes, and as an explanation of their overall contents and purpose.

  6. Evaluation of mandibular length in subjects with Class I and Class II skeletal patterns using the cervical vertebrae maturation

    Directory of Open Access Journals (Sweden)

    Rodrigo Generoso

    2010-03-01

    Full Text Available The aim of this study was to compare the mandibular size in boys and girls with Class I and Class II skeletal patterns, taking into consideration the bone maturation stage, as defined by the cervical vertebrae maturation. One hundred and sixty cephalometric radiographs were obtained from subjects (aged between 7 and 12 years with Class I or Class II skeletal patterns, according to the ANB angle and WITS appraisal. The Class I sample consisted of 80 subjects (40 boys, 40 girls. The Class II sample also consisted of 80 subjects (40 boys, 40 girls. On a cross-sectional basis, mandibular length (Co-Gn was compared between groups and genders. The between-stages changes were also evaluated, with the cervical vertebrae analysis used for establishing the bone maturation stages at CS2, CS3, CS4 and CS5. The results were statistically analyzed by the Kruskal-Wallis test. The mandibular length differed between skeletal patterns only at the earlier stages of development. In the Class I pattern, the mandibular lengths of boys were greater than those of girls at stages CS2, CS4 and CS5, whereas in the Class II pattern, the mandibular lengths of boys were greater than those of girls at stages CS2, CS3 and CS4. The present results indicate a sexual dimorphism in the mandibular length at almost all stages of bone maturation, in exception of the CS5 stage in Class II.

  7. Ethnicity versus Class: An Analysis of Conflict in a North American Chinese Community.

    Science.gov (United States)

    Thompson, Richard H.

    1979-01-01

    Examines effects of population growth (due to immigration) and social and economic change on class formation and conflict among Toronto's ethnic Chinese. Suggests that what is often interpreted as ethnic conflict is actually class conflict and that groups consciously use ethnicity to obscure the fundamental class basis of their conflict.…

  8. 7 CFR 30.44 - Class 9; foreign-grown types other than cigar leaf.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Class 9; foreign-grown types other than cigar leaf. 30... STANDARD CONTAINER REGULATIONS TOBACCO STOCKS AND STANDARDS Classification of Leaf Tobacco Covering Classes, Types and Groups of Grades § 30.44 Class 9; foreign-grown types other than cigar leaf. No...

  9. Class Size Influences on Student Performance, Attitudes, and Behavior: How Big Is Too Big?

    Science.gov (United States)

    Allen, Amy; Brannon, Patsy; Sims, Laura

    1999-01-01

    Reviews literature on class size and its influence on student performance, attitudes, and behavior, highlighting a recent study of the effect of lecture-group size on the latter variables in an introductory college nutrition course. Student class-size preferences, attitudes about large-class characteristics, interest in the discipline, attitudes…

  10. Expansion/Facemask Treatment of an Adult Class III Malocclusion.

    Science.gov (United States)

    Jackson, Gregory W; Kravitz, Neal D

    2014-01-01

    The orthodontic treatment of class III malocclusion with a maxillary deficiency is often treated with maxillary protraction with or without expansion. Skeletal and dental changes have been documented which have combined for the protraction of the maxilla and the correction of the class III malocclusion. Concerning the ideal time to treat a developing class III malocclusion, studies have reported that, although early treatment may be the most effective, face mask therapy can provide a viable option for older children as well. But what about young adults? Can the skeletal and dental changes seen in expansion/facemask therapy in children and adolescents be demonstrated in this age group as well, possibly eliminating the need for orthodontic dental camouflage treatment or orthognathic surgery? A case report is presented of an adult class III malocclusion with a Class III skeletal pattern and maxillary retrusion. Treatment was with nonextraction, comprehensive edgewise mechanics with slow maxillary expansion with a bonded expander and protraction facemask.

  11. 长沙市某三甲医院住院患者RhD阴性血型分布特征*%Distribution of RhD negative blood group of inpatients in a first-class grade-three hospital in Changsha

    Institute of Scientific and Technical Information of China (English)

    黄琬婷; 覃婉元; 陈廷寅; 周俭辉; 沈亚梅; 李碧娟; 李宁

    2016-01-01

    目的:探讨长沙地区某三甲医院住院患者RhD阴性血型分布特征。方法用血型凝胶卡和试管法对2011年1月-2015年4月的住院患者进行ABO及RhD血型检测。结果255179例住院患者ABO血型分布特征为O>A>B>AB,男女之间ABO血型分布差异无统计学意义(>0.05);检出RhD阴性个体1470例,阴性率为0.58%,其中A型RhD阴性[A(-)]占0.22%,B(-)占0.12%,AB(-)占0.04%,O(-)占0.20%,分布特征为A>O>B>AB;男女之间RhD阴性分布差异有统计学意义(O>A>AB,女性为A>O>AB>B。RhD阴性患者中以产科患者为首,约占28.23%,其次为普外科患者和神经外科患者,分别占16.63%和7.91%。结论住院患者RhD阴性血型具有较高的频率,女性高于男性,且以产科患者为主。RhD阴性血型在ABO血型系统中的分布存在性别差异,其机制有待进一步研究。%Objective To investigate RhD negative blood type distribution of inpatients in a first-class grade-three hospital in Changsha. Methods The DiaMed gel card and test tube methods were used to detect blood type of patients from January of 2011 to April of 2015. Results A survey of blood samples of 255,179 inpatients showed the distribution of O>A>B>AB, and there was no significant distribution difference between female and male (P>0.05). Among those patients, there were 1,470 RhD negative individuals, which accounted for 0.58% in all inpatients. Blood group A RhD negative [A (- )] had the highest distribution of 0.22%, followed by O(-) and B(-) with 0.20% and 0.12% respectively, and the lowest distribution of 0.04% was AB (-). The RhD negative ratio of female was higher than that of male. RhD negative distribution in ABO system was different between male and female; the order in male was B>O>A>AB, while the order in female was A>O>AB>B. Among all RhD negative patients, the majority of the patients were obstetric patients accounting for 28.23%, followed by neurosurgical

  12. Helping Alleviate Statistical Anxiety with Computer Aided Statistical Classes

    Science.gov (United States)

    Stickels, John W.; Dobbs, Rhonda R.

    2007-01-01

    This study, Helping Alleviate Statistical Anxiety with Computer Aided Statistics Classes, investigated whether undergraduate students' anxiety about statistics changed when statistics is taught using computers compared to the traditional method. Two groups of students were questioned concerning their anxiety about statistics. One group was taught…

  13. The Characterization of the Spectrum of a Class of Relations

    Directory of Open Access Journals (Sweden)

    The Characterization of the Spectrum of a Class of Relations

    2007-06-01

    Full Text Available Hereditary, directed subsets of a group and a semigroup and some of their properties are discussed. A class of relations in terms of the range projections of a partial representation of a discrete group is introduced. It is shown that the spectrum of these relations is homeomorphic to the set of all characters of the diagonal subalgebra of the Toeplitz algebra.

  14. The Views of Class Teachers on Acquisition of Entrepreneurship Ability

    Science.gov (United States)

    Aladag, Soner

    2017-01-01

    Aim of this study is to determine the views of class teachers on the acquisition of entrepreneurship abilities. With being a qualitative research, adopted approach is phenomenology. Study group was determined by a suitable sampling method. The study group included eight classroom teachers working in primary schools in Aydin. The data of the study…

  15. New Ramsey Classes from Old

    CERN Document Server

    Bodirsky, Manuel

    2012-01-01

    Let C_1 and C_2 be strong amalgamation classes of finite structures, with disjoint finite signatures sigma and tau. Then C_1 wedge C_2 denotes the class of all finite (sigma cup tau)-structures whose sigma-reduct is from C_1 and whose tau-reduct is from C_2. We prove that when C_1 and C_2 are Ramsey, then C_1 wedge C_2 is also Ramsey. We also discuss variations of this statement, and give several examples of new Ramsey classes derived from those general results.

  16. Lipschitz classes on local fields

    Institute of Scientific and Technical Information of China (English)

    Wei-yi SU; Guo-xiang CHEN

    2007-01-01

    The Lipschitz class Lipα on a local field K is defined in this note, and the equivalent relationship between the Lipschitz class Lipα and the Holder type space Cα (K) is proved. Then, those important characteristics on the Euclidean space Rn and the local field K are compared, so that one may interpret the essential differences between the analyses on Rn and K. Finally, the Cantor type fractal function (V)(x) is showed in the Lipschitz class Lip (m, K), m < ln2/ln3.

  17. Lipschitz classes on local fields

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The Lipschitz class Lipαon a local field K is defined in this note,and the equivalent relationship between the Lipschitz class Lipαand the Holder type space C~α(K)is proved.Then,those important characteristics on the Euclidean space R~n and the local field K are compared,so that one may interpret the essential differences between the analyses on R~n and K.Finally,the Cantor type fractal functionθ(x)is showed in the Lipschitz class Lip(m,K),m<(ln 2/ln 3).

  18. The Relationship between Class I and Class II Methanol Masers

    CERN Document Server

    Ellingsen, S P

    2005-01-01

    The Australia Telescope National Facility Mopra millimetre telescope has been used to search for 95.1-GHz class I methanol masers towards sixty-two 6.6-GHz class II methanol masers. A total of twenty-six 95.1-GHz masers were detected, eighteen of these being new discoveries. Combining the results of this search with observations reported in the literature, a near complete sample of sixty-six 6.6-GHz class II methanol masers has been searched in the 95.1-GHz transition, with detections towards 38 per cent (twenty-five detections ; not all of the sources studied in this paper qualify for the complete sample, and some of the sources in the sample were not observed in the present observations). There is no evidence of an anti-correlation between either the velocity range, or peak flux density of the class I and II transitions, contrary to suggestions from previous studies. The majority of class I methanol maser sources have a velocity range that partially overlaps with the class II maser transitions. The presence...

  19. Management of Classes with Breaches of Discipline

    Institute of Scientific and Technical Information of China (English)

    陈海军

    2009-01-01

    As an only child is pampered and spoiled by parents, the contemporary student easily breaches class discipline. Class management appears more concerned than ever because breaches of class discipline have great impact on teaching. The author clarifies the necessity to study the management of classes with breaches of class discipline, numerates the phenomena of breaches of class discipline, precisely analyzes the causes from teachers and students and especially submits several measures to effectively prevent breaches of class discipline.

  20. Steinitz class of elliptic curves with complex multilication

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Let E be any elliptic curve having complex multiplication by the ring CK of integers of the quadratic number field K= Q(- D). Let H be the Hilbert class field of K. The Mordell-Weil group E(H) of H-rational points is a module over the Dedekind domain CK, its structure depends on its Steinitz class. Here the Steinits class is determined when D is any prime number. This result advances the result for the specific elliptic curves when D=10.A general theorem on structure of modules over Dedekind domain is also proposed.