On Slavic semelfactives and secondary imperfectives: Implications for the split ‘AspP’

The Russian semelfactive (event-minimizing) suffix \u27nu\u27 (e.g. pryg-nu-t’ = to jump once), rarely discussed in the rich literature on Slavic aspect, (Forsyth 1970, Fowler 1994, Borik 2002, Svenonius 2004a,b,c, Filip 2000, 2003, Romanova 2004, inter alia) presents an interesting problem as it shows a number of striking differences from other perfective operators and unexpected, previously unobserved similarities to the secondary imperfective suffix \u27iv\u27 (e.g. vy-pry-iv-at’ = to be jumping out). I argue that both suffixes instantiate the same light verb v. Whether the v is realized as nu or iv depends on whether it has features [+Inst] or [+Prog]/ [+Hab] respectively. The paper is embedded into a large body of work (Svenonius 2004, Romanova 2004, Matushansky 2002) that treats aspectual prefixes in Slavic as prepositions. It adds to the existing discourse by addressing the status of aspectual suffixes. Empirically, the proposal unifies the seemingly distant secondary imperfective and semelfactive suffixes in Russian and links them to light verb constructions such as those present in Hindi and Yiddish. On a theoretical side, the proposal places the aspectual phrase (AspP) into a typology of split categories alongside CP (Rizzi 1997) and IP (Pollock 1989). The overall conclusion that emerges from the proposal is that while the perfective/ imperfective distinction in Slavic is a real one, it is semantic in nature and is not due to the [+/- perfective] feature on an Aspect head. In Slavic, and arguably, universally, Asp is a collocation of syntactic heads, but is not itself a head

"Energy supply" and "energy efficiency": specification of concepts, the system of balanced parameters of "energy efficiency"

On the basis of analysis of concepts "energy supply" and "energy efficiency" the inadmissibility of their identification has been shown. Parameters for quantitative characteristic of these concepts are specified. For the first time it is offered to use the system of balanced parameters of energy efficiency for developing norms of electric energy consumption

Generalized static characteristics of electric power subsystems and their steepness factors

Representation of parts of electric power systems by generalized static characteristics has been considered. The design procedure of steepness factors of generalized static characteristics depending on features of equivalent subsystems is discussed. The generalized static characteristics and their steepness factors give the equivalent information on power subsystems and can be used at estimation of static aperiodic stability of power supply systems

Does Peer Ability Affect Student Achievement?

Empirical analysis of peer effects on student achievement has been open to question because of the difficulties of separating peer effects from other confounding influences. While most econometric attention has been directed at issues of simultaneous determination of peer interactions, we argue that issues of omitted and mismeasured variables are likely to be more important. We control for the most important determinants of achievement that will confound peer estimates by removing student and school-by-grade fixed effects in addition to observable family and school characteristics. The analysis also addresses the reciprocal nature of peer interactions and the interpretation of estimates based upon models using past achievement as the measure of peer group quality. The results indicate that peer achievement has a positive effect on achievement growth. Moreover, students throughout the school test score distribution appear to benefit from higher achieving schoolmates. On the other hand, the variance in achievement appears to have no systematic effect.

Matrix String Theory and its Moduli Space

The correspondence between Matrix String Theory in the strong coupling limit and IIA superstring theory can be shown by means of the instanton solutions of the former. We construct the general instanton solutions of Matrix String Theory which interpolate between given initial and final string configurations. Each instanton is characterized by a Riemann surface of genus h with n punctures, which is realized as a plane curve. We study the moduli space of such plane curves and find out that, at finite N, it is a discretized version of the moduli space of Riemann surfaces: instead of 3h-3+n its complex dimensions are 2h-3+n, the remaining h dimensions being discrete. It turns out that as $N$ tends to infinity, these discrete dimensions become continuous, and one recovers the full moduli space of string interaction theory.Comment: 30 pages, LaTeX, JHEP.cls class file, minor correction

Multi-Hamiltonian structures for r-matrix systems

For the rational, elliptic and trigonometric r-matrices, we exhibit the links between three "levels" of Poisson spaces: (a) Some finite-dimensional spaces of matrix-valued holomorphic functions on the complex line; (b) Spaces of spectral curves and sheaves supported on them; (c) Symmetric products of a surface. We have, at each level, a linear space of compatible Poisson structures, and the maps relating the levels are Poisson. This leads in a natural way to Nijenhuis coordinates for these spaces. At level (b), there are Hamiltonian systems on these spaces which are integrable for each Poisson structure in the family, and which are such that the Lagrangian leaves are the intersections of the symplective leaves over the Poisson structures in the family. Specific examples include many of the well-known integrable systems.Comment: 26 pages, Plain Te

String Interactions from Matrix String Theory

The Matrix String Theory, i.e. the two dimensional U(N) SYM with N=(8,8) supersymmetry, has classical BPS solutions that interpolate between an initial and a final string configuration via a bordered Riemann surface. The Matrix String Theory amplitudes around such a classical BPS background, in the strong Yang--Mills coupling, are therefore candidates to be interpreted in a stringy way as the transition amplitude between given initial and final string configurations. In this paper we calculate these amplitudes and show that the leading contribution is proportional to the factor g_s^{-\chi}, where \chi is the Euler characteristic of the interpolating Riemann surface and g_s is the string coupling. This is the factor one expects from perturbative string interaction theory.Comment: 15 pages, 2 eps figures, JHEP Latex class, misprints correcte

Computer-Based Assessment of Non-Cognitive Attributes of Occupational Therapy Students: A Pilot Evaluation

Purpose: Holistic admissions tools have been considered for use to diversify student admissions. The ability to screen non-cognitive attributes of applicants is an important element of holistic admissions. The objective of this study was to establish instrument reliability, inter-rater reliability, validity, item discrimination, item difficulty, and bias of the Computerized Assessment of Non-Cognitive Attributes of Health Care Professionals (CANA-HP). Methods: A novel methodology was developed to screen non-cognitive attributes of health profession applicants. Using a cross-sectional design, a convenience sample of students invited for interviews into a Mid-western occupational therapy program were recruited for participation. The 37 participants who consented, completed a demographic survey followed by the 12 question CANA-HP. Results: Open-ended questions had adequate internal reliability, discrimination, and difficulty. Multiple choice questions had low reliability and discrimination. No correlation was found between the CANA-HP and standardized cognitive assessments, except non-science GPA which was significantly correlated to the total open-ended (essay) scores and total overall score. Conclusions and Recommendations: The CANA-HP was not biased toward individuals from varied demographic backgrounds. Predictive validity of this tool and non-cognitive measurements of success are still needed. Occupational therapists in educational settings could consider adding open-ended ethical questions to the application process when interviews are not feasible. Classes in the non-sciences and other non-cognitive markers of success may also help identify students with ‘grit’ and critical reasoning which are important to practicing clinician

Curve classes on irreducible holomorphic symplectic varieties

We prove that the integral Hodge conjecture holds for 1-cycles on irreducible holomorphic symplectic varieties of K3 type and of Generalized Kummer type. As an application, we give a new proof of the integral Hodge conjecture for cubic fourfolds.Comment: 15 page