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Springfield, MO, United States

Missouri State University is a public university located in Springfield, Missouri, United States and was founded in 1906. It is the state's second largest university, with an official enrollment of 22,385 in the fall 2014 semester. In 2011 students represented 50 states, the District of Columbia, the Virgin Islands, and 83 countries. The Springfield campus is one of two degree granting institutions within the Missouri State University System, the other being a two-year campus in West Plains, Missouri. A bachelor of science in business from MSU is offered at the Missouri State University Branch Campus Dalian in the People's Republic of China. In addition to its main campus, MSU maintains a fruit research station in Mountain Grove and the Department of Defense and Strategic Studies program housed in Fairfax, Virginia. The school is classified by the Carnegie Foundation as one of six master's colleges and universities in Missouri. In the 2014 U.S. News and World Report the school was ranked 68th in the category Midwestern regional universities. Wikipedia.

Bosch E.,Missouri State University
Crystal Growth and Design | Year: 2014

The X-ray structure of the complex formed between N,N-dimethylaminopyridine (DMAP) and 1,2-bis(iodoethynyl)benzene is reported. The N - I halogen bond lengths are 2.654 and 2.662 Å, approximately 75% of the sum of the van der Waals radii. On the basis of literature precedent and electrostatic potential calculations, a series of fluorosubstituted iodophenylacetylenes were prepared and individually complexed with dimethylaminopyridine in a search for shorter halogen bonds. A N - I halogen bond distance of 2.680 Å was observed in the DMAP complex with 3,5-difluoro(iodoethynyl)benzene, and halogen bond distances of 2.622, 2.676, 2.700, and 2.705 Å were observed in the complex of 4-fluoro(iodoethynyl)benzene with DMAP. These N - I bond distances range from 74.3 to 76.6% of the sum of the van der Waals radii. © 2013 American Chemical Society. Source

Morrison L.W.,Missouri State University
Global Ecology and Biogeography | Year: 2010

Aim: To document long-term rates of immigration, extinction and turnover in insular floras and evaluate the relative impacts of recent hurricane activity and climate change. Location: Three archipelagos of small islands, in the Exuma Cays, Andros and Abacos, Bahamas. Methods: I surveyed the floras of 194 vegetated islands in three archipelagos over several multi-year periods, spanning up to 17 years. Changes in abundance (foliar cover) of persistent populations were measured on a subset of 14 islands in the Exuma Cays over a 9-year period. Results: Rates of plant turnover were generally low compared with other organisms, but varied among archipelagos and time periods. Turnover rates were usually higher in the second decade of this study, and extinction rates were often dramatically higher than immigration rates in the second decade, resulting in overall decreases in species richness. Turnover did not differ significantly among island types based on generalized location and surrounding water depths, and extinctions were not more likely to occur on more exposed islands. The abundance (foliar cover) of populations that did not go extinct decreased steadily over the second decade of this study, indicating, along with higher extinction rates, a generalized decline in these insular floras. Main conclusions: Although some islands may have been at or near a state of dynamic equilibrium in the first decade of this study, average species richness declined in all three archipelagos during the second decade, when extinctions greatly outnumbered immigrations. Four major hurricanes affected the study archipelagos in the second decade of this study, although the available evidence suggests that the hurricanes were not directly responsible for the declines. Indirect effects of hurricanes such as increased herbivory and possible decreased nutrient availability, along with a long-term (25 years) increase in temperature and decline in rainfall are likely contributing factors. © 2010 Blackwell Publishing Ltd. Source

Morrison L.W.,Missouri State University
Ecography | Year: 2011

Classic island biogeography theory predicts that very small islands, near the extreme lower end of the species-area relationship, should support very few species. At times no species may be present, however, due to randomness in the immigration-extinction dynamics. Alternatively, a lack of vegetation on very small islands may indicate that such islands do not contain the appropriate habitat for the establishment or long-term survival of plants, or that disturbances are too frequent or intense. These potential mechanisms were evaluated in the central Exumas, Bahamas, where surveys of 117 small islands revealed that over a third of the islands supported no terrestrial plant life. Area and exposure were significant predictors of whether a small island was vegetated or not in multiple logistic regressions. No islands naturally devoid of vegetation were colonized over a 17-yr period, and only two naturally vegetated islands lost all vegetation. Experimental introductions of two species -Sesuvium portulacastrum and Borrichia arborescens- revealed that a number of islands naturally lacking vegetation were able to sustain introduced populations over the long term (up to 15 yr). Drought and hurricanes appeared to have reduced the establishment success and possibly long-term survival of the introductions, although some populations survived four major hurricanes. Turnover rates of both introduced species were often an order of magnitude higher on the experimental introduction islands than on other islands in the archipelago. It appears many of the islands in this system that naturally lack vegetation may be physically capable of supporting terrestrial plant life, yet have no plants primarily due to barriers to colonization. © 2011 The Authors. Ecography © 2011 Ecography. Source

Bosch E.,Missouri State University
Crystal Growth and Design | Year: 2010

Evidence supporting the central role of alkynyl sp-C-H-N hydrogen bonds in the formation of discrete molecular complexes as well as one-and two-dimensional bimolecular sp-C-H-N hydrogen bonded networks is presented. The crystal structures of seven bimolecular complexes formed between nitrogen-containing aromatics and compounds containing terminal alkynes are reported. The average N-H distance in these structures is 2.35 Å, well below the sum of the van der Waals radii of 2.80 Å, and the average N-H-C bond angle is 173.2°. © 2010 American Chemical Society. Source

Zheng S.,Missouri State University
Expert Systems with Applications | Year: 2012

In the framework of functional gradient descent/ascent, this paper proposes Quantile Boost (QBoost) algorithms which predict quantiles of the interested response for regression and binary classification. Quantile Boost Regression performs gradient descent in functional space to minimize the objective function used by quantile regression (QReg). In the classification scenario, the class label is defined via a hidden variable, and the quantiles of the class label are estimated by fitting the corresponding quantiles of the hidden variable. An equivalent form of the definition of quantile is introduced, whose smoothed version is employed as the objective function, and then maximized by functional gradient ascent to obtain the Quantile Boost Classification algorithm. Extensive experimentation and detailed analysis show that QBoost performs better than the original QReg and other alternatives for regression and binary classification. Furthermore, QBoost is capable of solving problems in high dimensional space and is more robust to noisy predictors. © 2011 Elsevier Ltd. All rights reserved. Source

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