The orbit of the Cepheid AW Per

An orbit for the classical Cepheid AW Per was derived. Phase residuals from the light curve are consistent with the light-time effect from the orbit. The companion was studied using IUE spectra. The flux distribution from 1300 to 1700 A is unusual, probably an extreme PbSi star, comparable to a B7V or B8V star. The flux of the composite spectrum from 1200 A through V is well matched by F7Ib and B8V standard stars with Delta M(sub upsilon) = 3(m) multiplied by 1. The mass function from the orbit indicates that the mass of the Cepheid must be greater that 4.7 solar mass if it is the more massive component. A B7V to B8V companion is compatible with the 1 sigma lower limit (3.5 solar mass) from the mass function. This implies that the Cepheid has the same mass, but the large magnitude difference rules this out. It is likely that the companion is itself a binary

A space transportation system operations model

Presented is a description of a computer program which permits assessment of the operational support requirements of space transportation systems functioning in both a ground- and space-based environment. The scenario depicted provides for the delivery of payloads from Earth to a space station and beyond using upper stages based at the station. Model results are scenario dependent and rely on the input definitions of delivery requirements, task times, and available resources. Output is in terms of flight rate capabilities, resource requirements, and facility utilization. A general program description, program listing, input requirements, and sample output are included

An Investigation Of Attitudes And Perceptions Of Preservice Teachers Compared To First Year Teachers Toward Inclusion

Abstract: over the last decade the mandated push for full inclusion has changed the dynamics of our general education classrooms to the extent that our general education teachers do not feel adequately prepared to teach. The lack of preparation may affect the pre-service teachers\u27 attitude and perception of students with disabilities in a general education classroom. The limited research in this area prompted this study. The purpose of this quantitative, cross-sectional study was to investigate how the perceptions and attitudes of inclusion and teacher efficacy differ from preservice teacher candidates to first year teachers. Preservice teacher candidates (n=40) and first year teachers (n=51) were students or graduates of one university in southeastern United States. The results were determined by using a variety of statistical testing including a one sample t-test, Pearson correlation coefficient, and a one-way anova. The findings indicate that preservice teachers and first year teachers believe in having students with disabilities included in their classrooms, but that belief doesn\u27t extend to being able to manage behavior. It also indicated that self-efficacy is consistent in student teacher candidates and first year teachers, but teacher efficacy is higher in student teacher candidates, with teacher efficacy dropping during the first year of teaching

Pulsed Generic Advertising: The Case of Common Property

Regulation of fisheries production together with public promotion of fisheries products offer a potentially profitable environment for fishermen. Yet production restrictions are usually insufficient to prevent entry, causing depletion of the resource base and dissipation of long-run profits from promotion. Shorter run gains may be possible, providing producer response to advertising is not instantaneous. Lagged biological and economic responses appear to provide a rationale for pulsed advertising. Moreover, a pulsed advertising policy is shown to mitigate the adverse effects on the resource base which would normally accompany expansion of consumption without direct production control.generic promotion, oysters, common property, pulsed advertising, Environmental Economics and Policy, Resource /Energy Economics and Policy,

Passing the President's Program: Public Opinion and Presidential Influence in Congress

Correlations between legislative support scores and presidential popularity do not accurately reflect the relationship between public opinion and presidential influence in Congress. Presidents make strategic choices to expend their public prestige to obtain congressional approval of programmatic initiatives. Previous studies have ignored such choices as well as other features of the strategic environment which tend to lower the apparent legislative success rates of popular presidents. A model of presidential and congressional behavior is proposed and it is estimated that a one percent increase in a president's public support level increases the president's legislative approval rate by approximately one percent (holding program size fixed)

Information flow and acquisition of knowledge in water governance in the Upper East Region of Ghana:

"This paper provides an assessment of information flows and the acquisition of knowledge in water governance of the Upper East Region, Ghana. These flows are patchy, often parallel, disconnected or slow. In many cases a great deal of information is gathered but for a number of reasons not transferred into knowledge that impacts on decision making and action. An analysis of knowledge flows can serve as guidance for research projects and capacity building endeavours to allow tackling the gap between data collection and knowledge for action." from authors' abstractWater governance, Irrigation, drinking water, information flow,

A q-continued fraction

Let a, b, c, d be complex numbers with d 6= 0 and |q| \u3c 1. Define H1(a, b, c, d, q) := 1 1 + −abq + c (a + b)q + d + · · · + −abq2n+1 + cqn (a + b)q n+1 + d + · · · . We show that H1(a, b, c, d, q) converges and 1 H1(a, b, c, d, q) − 1 = c − abq d + aq P∞ j=0 (b/d) j (−c/bd)j q j(j+3)/2 (q)j (−aq2/d)j P∞ j=0 (b/d) j (−c/bd)j q j(j+1)/2 (q)j (−aq/d)j . We then use this result to deduce various corollaries, including the following: 1 1 − q 1 + q − q 3 1 + q 2 − q 5 1 + q 3 − · · · − q 2n−1 1 + q n − · · · = (q 2 ; q 3 )∞ (q; q 3)∞ , (−aq)∞ X∞ j=0 (bq) j (−c/b)j q j(j−1)/2 (q)j (−aq)j = (−bq)∞ X∞ j=0 (aq) j (−c/a)j q j(j−1)/2 (q)j (−bq)j , and the Rogers-Ramanujan identities, X∞ n=0 q n 2 (q; q)n = 1 (q; q 5)∞(q 4; q 5)∞ , X∞ n=0 q n 2+n (q; q)n = 1 (q 2; q 5)∞(q 3; q 5)∞