Business-Oriented Leadership Competencies of K-12 Educational Leaders

Contemporary K-12 educational leaders must fulfill many roles and responsibilities similar to those fulfilled by traditional business leaders. There is, however, a lack of information about the business-oriented competencies of K12 educational leaders in comparison with business executive norms. This lack of information places K-12 institutions at risk of selecting leaders who are not capable of accomplishing institutional goals and objectives, improving the efficiency and sustainability of business operations, meeting stakeholder expectations, managing social responsibilities, and improving the educational foundation of the next-generation workforce. Grounded in leadership theory, this nonexperimental study included the California Psychological Inventory 260 assessment to capture leadership scale values of 20 K-12 educational leaders in the United States. A 2-tailed, 1-sample t test was used to examine the difference between the leadership scale mean of the sample (n = 20) and the leadership scale mean test value of 62 as measured by the Center for Creative Leadership within a group of business executives (n = 5,610). Using a 95% confidence level, the calculated leadership scale mean value for the sample was 61.96 (p = .982). Although no significant difference existed between the leadership scale means, the identification of gaps in business-oriented leadership competencies indicates that some K-12 leaders may require additional professional development. The findings from this study may influence positive social change by providing human resource and hiring managers with knowledge about using leadership scale measurements to improve the selection and professional development of K-12 educational leader

Analysis of a Proposed First Generation Physical Map of the Human Genome

Cohen and colleagues [1] recently described a project to characterize a human yeast artificial chromosome (YAC) library and offered a 'proposed data analysis strategy' that was said to yield a physical map covering 87% of the human genome. The authors provided no analytical evaluation to test the validity of their novel strategy for constructing 'paths' in the genome. We have now examined the proposed method in detail. Analytical studies show that most paths with at most two YACs or spanning less than 5 cM are valid, but most paths involving four or more YACs or spanning 5 cM or more are invalid. After restricting the map to paths with a high probability of being valid, we conclude that the remaining map properly covers at most 36% of the genome

Isotopes, Ice Ages, and Terminal Proterozoic Earth History

Detailed correlations of ancient glacial deposits, based on temporal records of carbon acid strontium isotopes in seawater, indicate four (and perhaps five) discrete ice ages in the terminal Proterozoic Eon. The close and repeated stratigraphic relationship between C-isotopic excursions and glaciogenic rocks suggests that unusually high rates of organic carbon burial facilitated glaciation by reducing atmospheric greenhouse capacity. The emerging framework of time and environmental change contributes to the improved resolution of stratigraphic and evolutionary pattern in the early fossil record of animals.Organismic and Evolutionary Biolog

Data and algorithms for genomic physical mapping

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.Includes bibliographical references (leaves 116-122).by Alan P. Kaufman.M.S

As sucessões carbonáticas neoproterozóicas do Cráton do São Francisco e os depósitos de fosfato: correlações e fosfogênese

Neoproterozoic Carbonate Sequences of the São Francisco Craton and the Phosphate Deposits: Correlation and Phosphogenesis. The neoproterozoic carbonate successions of the São Francisco craton are formed by thick carbonate and siliciclastic strata accumulated in epicontinental seaways, and on passive margins. At least two transgressive-regressive sea level cycles have been recognized during the evolution of the carbonate mega-sequences. These successions, represented by the Vazante, Bambuí, and Una Groups, lie above basal glacio-marine diamictites of probable Sturtian age, and an upper glacio-marine diamictite, was observed in upper units of the Vazante Group. The broad similarities of lithofacies, as well as the presence of phosphate and sulfide (Zn,Pb) deposits restricted to narrow stratigraphic intervals, suggest that the Vazante, Bambuí and Una Groups may be correlative. The Sr isotope data from well preserved carbonates and carbonate fluorapatite from each of these successions, ranging from 0.70763 to 0.70794, support the general correlation and are indicative of seawater composition around 650 Ma, although the lower 87Sr/86Sr values of 0.70614 at the Vazante carbonates may suggest that this unit is older than the Bambuí and Una carbonate rocks. Carbon isotope data of carbonate fluorapatite reveal sharp negative excursions between -3.47 and -12.25‰ VPDB in the cratonic area, and between -1.3 and -9.61‰ VPDB in the carbonate fluorapatite hosted by the passive margin Vazante carbonates, suggesting that primary P concentration was accumulated in strong anoxic environments in both geotectonic settings. Carbonate hosting the phosphate deposits in these units are moderately enriched in 13C, ranging from positive δ13C values of +2.0 and +9.6‰ VPDB in the different sections. Primary phosphate accumulations occur above glaciogenic successions. We suggest that these concentrations may be due to high organic productivity after glacial events