EVALUATING EFFICIENT METHODS OF GATHERING AERODYNAMIC CONTROL COEFFICIENTS FOR MISSILE SYSTEM IDENTIFICATION

In the contemporary military landscape, the efficacy of defense strategies increasingly hinges on the ability to develop cost-effective, easily manufacturable weaponry. This paradigm shift towards economical armaments is crucial in maintaining tactical superiority while adhering to budgetary constraints. An illustrative example of this trend is an ongoing project at the Naval Postgraduate School (NPS), which aims to construct a missile utilizing off-the-shelf components and additive manufacturing technologies, specifically designed for deployment within the Marine Corps. This initiative exemplifies the strategic shift towards modular, scalable weapon systems that can be rapidly produced and deployed.Central to the success of such endeavors is the ability to accurately predict the performance characteristics of these conventional designs under operational conditions. My research contributes to this field by exploring inexpensive, efficient methodologies for obtaining aerodynamic control coefficients for conventional missile configurations. By integrating Computational Fluid Dynamics (CFD) with semi-empirical models, this work not only enhances the precision of aerodynamic assessments but also significantly reduces the cost and time involved in the developmental phase of missile design. The findings of this study are poised to inform future design and manufacturing processes, ensuring that the next generation of missiles is both economically viable and tactically effective.Distribution Statement A. Approved for public release: Distribution is unlimited.Ensign, United States Nav

Notes on the ground-squirrel, Callospermophilus

http://deepblue.lib.umich.edu/bitstream/2027.42/56624/1/OP185.pd

The mammals of Iraq.

http://deepblue.lib.umich.edu/bitstream/2027.42/56350/1/MP106.pd

Powerful Partnerships: A Community Program for Low Income, High School Dropouts and a University

The proposed presentation describes the outcomes of a partnership between a youth and community development program and a teacher education program at a regional university in the Midwest. Once a federally funded program for low-income, youth ages 16-24, this agency provides General Equivalency Diploma (GED) preparation, job skills training, and community service opportunities for high school dropouts (Cohen & Piquero, 2008; Kapp, 2009), and faculty and pre-service teachers from a university supported the GED preparation and transition components of the program. Therefore, the proposal for this session most closely aligns with the "HEAD": Academic Achievement & Leadership strand of the conference, as results of the partnership indicate improved academic outcomes for program participants (increases in scores on standardized tests, GED pass rates, community colleges and technical institute enrollment, and full-time employment). In addition, the partnership simultaneously provided pre-service teachers a chance to apply teaching strategies in authentic and diverse learning environments that improved both teaching strategies and cultural responsiveness

Powerful Partnerships: A Community Program for Low Income, High School Dropouts and a University

This session provides community and university staff results of a study examining the partnership between a community development program targeting low income, high school dropouts and a teacher preparation program. Presenters will describe methods for maintaining partnerships and discuss outcomes of the program in the areas of GED preparation, job skills training, health and wellness programming, and community service opportunities

Herbivorous reptiles and body mass: Effects on food intake, digesta retention, digestibility and gut capacity, and a comparison with mammals

Differences in the allometric scaling between gut capacity (with body mass, BM1.00) and food intake (with BM0.75) should theoretically result in a scaling of digesta retention time with BM0.25 and therefore a higher digestive efficiency in larger herbivores. This concept is an important part of the so-called ‘Jarman-Bell principle’ (JBP) that explains niche differentiation along a body size gradient in terms of digestive physiology. Empirical data in herbivorous mammals, however, do not confirm the scaling of retention time, or of digestive efficiency, with body mass. Here, we test these concepts in herbivorous reptiles, adding data of an experiment that measured food intake, digesta retention, digestibility and gut capacity in 23 tortoises (Testudo graeca, T. hermanni , Geochelone nigra, G. sulcata, Dipsochelys dussumieri) across a large BM range (0.5-180 kg) to a literature data collection. While dry matter gut fill scaled to BM1.07 and dry matter intake to BM0.76, digesta mean retention time (MRT) scaled to BM0.17; the scaling exponent was not significantly different from zero for species > 1 kg. Food intake level was a major determinant of MRT across reptiles and mammals. In contrast to dietary fibre level, BM was not a significant contributor to dry matter digestibility in a General Linear Model. Digestibility coefficients in reptiles depended on diet nutrient composition in a similar way as described in mammals. Although food intake is generally lower and digesta retention longer in reptiles than in mammals, digestive functions scale in a similar way in both clades, indicating universal principles in herbivore digestive physiology. The reasons why the theoretically derived JBP has little empirical support remain to be investigated. Until then, the JBP should not be evoked to explain niche differentiation along a body size axis in terms of digestive physiology

Relationship between diffusion capacity and small airway abnormality in COPDGene.

Impaired single breath carbon monoxide diffusing capacity (DLCO) is associated with emphysema. Small airways disease (SAD) may be a precursor lesion to emphysema, but the relationship between SAD and DLCO is undescribed. We hypothesized that in mild COPD, functional SAD (fSAD) defined by computed tomography (CT) and Parametric Response Mapping methodology would correlate with impaired DLCO. Using data from ever-smokers in the COPDGene cohort, we established that fSAD correlated significantly with lower DLCO among both non-obstructed and GOLD 1-2 subjects. The relationship between DLCO with CT-defined emphysema was present in all GOLD stages, but most prominent in severe disease. TRIAL REGISTRATION: NCT00608764. Registry: COPDGene. Registered 06 February 2008, retrospectively registered

Distinct ecotypes within a natural haloarchaeal population enable adaptation to changing environmental conditions without causing population sweeps

Microbial communities thriving in hypersaline brines of solar salterns are highly resistant and resilient to environmental changes, and salinity is a major factor that deterministically influences community structure. Here, we demonstrate that this resilience occurs even after rapid osmotic shocks caused by a threefold change in salinity (a reduction from 34 to 12% salts) leading to massive amounts of archaeal cell lysis. Specifically, our temporal metagenomic datasets identified two co-occurring ecotypes within the most dominant archaeal population of the brines Haloquadratum walsbyi that exhibited different salt concentration preferences. The dominant ecotype was generally more abundant and occurred in high-salt conditions (34%); the low abundance ecotype always co-occurred but was enriched at salinities around 20% or lower and carried unique gene content related to solute transport and gene regulation. Despite their apparent distinct ecological preferences, the ecotypes did not outcompete each other presumably due to weak functional differentiation between them. Further, the osmotic shock selected for a temporal increase in taxonomic and functional diversity at both the Hqr. walsbyi population and whole-community levels supporting the specialization-disturbance hypothesis, that is, the expectation that disturbance favors generalists. Altogether, our results provide new insights into how intraspecies diversity is maintained in light of substantial gene-content differences and major environmental perturbations