693 research outputs found

    Status of the tiger beetle Cicindela hirticollis Say (Coleoptera: Cicindelidae) in New York City and on Long Island, New York, USA

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    Coastal species are under considerable threat from recreational activities and climate change. The tiger beetle Cicindela hirticollis Say (Coleoptera: Cicindelidae) was recorded historically from 30 locations along the shores of New York City and Long Island, New York. We conducted surveys for extant populations of this species at 40 sites from 1989 to 2010. Adults of C. hirticollis were found at 13 beaches. Only four sites had 40 or more adults of C. hirticollis active at the time the beach was surveyed. No beetles were detected on the large coastal beaches that were formerly occupied by this species. Many coastal beaches of New York receive heavy human foot and vehicle traffic and are therefore unlikely to provide suitable habitat for C. hirticollis without a shift in beach management that recognizes the potential of some beaches as wilderness systems capable of supporting the full array of beach-dependent species

    Scintillation observations at medium latitude geomagnetically conjugate stations

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    Scintillation observations at medium latitude geomagnetically conjugate station

    Spatial and temporal variability and long-term trends in skew surges globally

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    Storm surges and the resulting extreme high sea levels are among the most dangerous natural disasters and are responsible for widespread social, economic and environmental consequences. Using a set of 220 tide gauges, this paper investigates the temporal variations in storm surges around the world and the spatial coherence of its variability. We compare results derived from two parameters used to represent storm surge: skew surge and the more traditional, non-tidal residual. We determine the extent of tide-surge interaction, at each study site, and find statistically significant (95% confidence) levels of tide-surge interaction at 59% of sites based on tidal level and 81% of sites based on tidal-phase. The tide-surge interaction was strongest in regions of shallow bathymetry such as the North Sea, north Australia and the Malay Peninsula. At most sites the trends in the skew surge time series were similar to those of non-tidal residuals, but where there were large differences in trends, the sites tended to have a large tidal range. Only 13% of sites had a statistically significant trend in skew surge, and of these approximately equal numbers were positive and negative. However, for trends in the non-tidal residual there were significantly more negative trends. We identified 8 regions where there were strong positive correlations in skew surge variability between sites, which meant that a regional index could be created to represent these groups of sites. Despite strong correlations between some regional skew surge indices, none were significant at the 95% level, however, at the 80% level there was significant positive correlation between the north-west Atlantic—south and the North Sea. Correlations between the regional skew surge indices and climate indices only became significant at the 80% level, where Ni?o 4 was positively correlated with the Gulf of Mexico skew surge index and negatively correlated with the east Australia skew surge index. The inclusion of autocorrelation in the calculation of correlation greatly reduced their significance, especially in the short time-series used for the regional skew surge indices. Skew surge improved the representation of storm surge magnitudes, and therefore allows a more accurate detection of changes on secular and inter-annual time scales

    Legal Issues Surrounding Christmas in Public Schools

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    As the United States becomes increasingly religiously diverse, surprisingly relatively little litigation has occurred over the celebration of religious holy days and holidays in public schools. Although the Supreme Court has addressed Christmas displays on two occasions—in Lynch v. Donnelly (1984) and County of Allegheny v. American Civil Liberties Union (1989)—neither case directly concerned public schools. The status of holiday celebrations in public schools is a key, if seasonal, issue in light of the importance of religion in the lives of many Americans, as educators seek to teach students to appreciate diversity in all of its manifestations, including religion

    The Supreme Court and Vouchers: An Overview for Educators in Catholic Schools

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    This article provides a critical summary of the current state of the voucher question as it relates to Catholic schools. After an in-depth look at the recent U.S. Supreme Court decision upholding the constitutionality of the Cleveland program (Zelman v. Simmons-Harris), the authors conclude that while voucher program might be part of an overall solution for educating the urban poor, they will have limited impact on Catholic schools

    The Supreme Court and the Pledge of Allegiance: a Hollow Victory

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    In Elk Grove Unified School District v Newdow (Elk Grove) the Supreme Court, in an 8–0 judgment, with three concurrences, upheld the words ‘under God’ in the Pledge of Allegiance. In light of the uproar caused by Elk Grove, this article is divided into three parts. After reviewing the history of the Pledge the second section examines the litigation involving the pledge, including Elk Grove in this regard. The article concludes with brief reflections on the meaning of Elk Grove
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