The Citadel, The Military College of South Carolina

About: The Citadel, The Military College of South Carolina is a education organization based out in Charleston, South Carolina, United States. It is known for research contribution in the topics: Stars & Population. The organization has 526 authors who have published 1316 publications receiving 18940 citations.

Elemental abundance analyses with DAO spectrograms. VII - The late normal B stars Pi Ceti, 134 Tauri, 21 Aquilae, and Nu Capricorni and the use of Reticon spectra

Abstract: This paper presents elemental abundance analyses of sharp-lined normal late B stars. These stars exhibit mostly near-solar abundances, but each star also shows a few abundances which are a factor of 2 less than solar. The coadded photographic spectrograms are supplemented with Reticon data. A comparison of 261 equivalent widths on 2.4 A/mm spectra of sharp-lined B and A stars shows that the Reticon equivalent widths are about 95 percent of the coadded equivalent mean. The H-gamma profiles of the coadded and Reticon spectra for eight sharp-lined stars show generally good agreement. The generally high quality of the coadded data produced from 10 or more spectrograms is confirmed using the REDUCE graphics-oriented computed reduction code. For five stars, metal lines which fall in the gap between the U and V plates are analyzed using Reticon data.

College Students' PTSD Symptoms, Coping, and Perceived Benefits Following Media Exposure to 9/11

Abstract: Given the magnitude of the September 11th terrorist attacks, attention to those exposed to media coverage of the attack appear warranted. In the current study, responses of students attending three Southern colleges were assessed one week to ten days following September 11th. A significant decrease in PTSD symptoms from the first 24 hours to the second day on was noted. PTSD symptoms also correlated significantly with previous traumas, the “information-seeking” coping dimension, the “ruminative/avoidance” coping dimension, and per ceived benefits. Perceived benefits were also correlated with total number of previous traumas and both dimensions of coping. The findings of the study provide important preliminary data on the relationship between responses to terrorism for a young adult population distant from the attack.

A Re-Examination of Corporate Selloffs of Real Estate Assets

Abstract: Prior research indicates that there are gains from real estate asset restructurings (see Glascock, Davidson and Sirmans [1989], Owers and Rogers [1986], and Elayan and Young [1993]). Researchers in these studies use the ordinary least squares market model to estimate expected returns, thus assuming that the error terms are normally distributed. However, there may be reason to believe that these residuals may exhibit significant heteroskedasticity (see for example Morgan and Morgan [1987], Connolly [1989], and Schwert and Seguin [1990]). Thus, we use a GARCH model to estimate the return behavior around a real estate asset restructuring. This procedure allows us to evaluate the impact on returns while also controlling for changes in variance during the event period. Therefore, we present more precise estimates of the effect of real estate restructuring than previous research. Our findings suggest that the traditional OLS market model does not provide the best fit for most firms in our sample. Only 40 of the 131 firms have return structures that follow the traditional market model. However, the general outcome is that the GARCH approach, while more accurate in modeling the error process, provides essentially identical overall economic results. Overall, as in prior research, sellers experience statistically positive returns on the announcement of a disposition, but buyers have no reaction on the announcement of a purchase.

Is territory defence related to plumage ornaments in the king penguin Aptenodytes patagonicus

Abstract: Colourful ornaments in monogamous birds may be directed at potential mates or other conspecifics to signal individual condition, reproductive status or fighting ability, especially in monogamous and territorial species. We investigated whether the size of the orange auricular patch may be an indicator of aggressiveness in the king penguin Aptenodytes patagonicus, a monogamous and territorial seabird. The relationship between auricular patch size and defence behaviour was explored relative to territory location (centre vs. periphery of the colony), period of reproduction (early vs. late), state of reproduction (incubation vs. brooding) and sex. The proportion of time spent in territorial defence and the rate of aggressive behaviours were positively correlated with auricular patch size, mainly because central birds were more aggressive than peripheral birds and also had larger patch sizes. The period of reproduction, state of reproduction and sex did not interact with patch size to affect aggressiveness. Our results suggest that the size of the auricular patch in king penguins may be a reliable signal allowing individuals to evaluate the quality of mates or competitors in terms of aggressiveness. Whether aggressiveness is directly linked to patch size or indirectly through body condition, however, remains to be determined. In any event, birds with larger patches seem to gain central territories in the colony, thereby increasing their reproductive success. Finally, our study adds to the growing evidence that the evolution of sexually monomorphic ornaments may stem from mutual sexual selection.

PRADA: A Practical Model for Integrating Computational Thinking in K-12 Education

Abstract: One way to increase access to education on computing is to integrate computational thinking (CT) into K12 disciplinary courses. However, this challenges teachers to both learn CT and decide how to best integrate CT into their classes. In this position paper, we present PRADA, an acronym for Pattern Recognition, Abstraction, Decomposition, and Algorithms, as a practical and understandable way of introducing the core ideas of CT to non-computing teachers. We piloted the PRADA model in two, separate, week-long professional development workshops designed for in-service middle and high school teachers and found that the PRADA model supported teachers in making connections between CT and their current course material. Initial findings, which emerged from the analysis of teacher-created learning materials, survey responses, and focus group interviews, indicate that the PRADA model supported core content teachers in successfully infusing CT into their existing curricula and increased their self-efficacy in CT integration.