Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory

The Pierre Auger Collaboration has reported. evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies E > E-th = 5.5 x 10(19) eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direction of Centaurus A. If the particles responsible for these excesses at E > E-th are heavy nuclei with charge Z, the proton component of the sources should lead to excesses in the same regions at energies E/Z. We here report the lack of anisotropies in these directions at energies above E-th/Z (for illustrative values of Z = 6, 13, 26). If the anisotropies above E-th are due to nuclei with charge Z, and under reasonable assumptions about the acceleration process, these observations imply stringent constraints on the allowed proton fraction at the lower energies.

Developmental Activities That Lead to Dropout and Investment in Sport

Background: Studies suggest that expert performance in sport is the result of long-term engagement in a highly specialized form of training termed deliberate practice. The relationship between accumulated deliberate practice and performance predicts that those who begin deliberate practice at a young age accumulate more practice hours over time and would, therefore, have a significant performance advantage. However, qualitative studies have shown that a large amount of sport-specific practice at a young age may lead to negative consequences, such as dropout, and is not necessarily the only path to expert performance in sport. Studies have yet to investigate the activity context, such as the amount of early sport participation, deliberate play and deliberate practice within which dropout occurs. Purpose: To determine whether the nature and amount of childhood-organized sport, deliberate play and deliberate practice participation influence athletes' subsequent decisions to drop out or invest in organized sport. It was hypothesized that young athletes who drop out will have sampled fewer sports, spent less time in deliberate play activities and spent more time in deliberate practice activities during childhood sport involvement. Participants: The parents of eight current, high-level, male, minor ice hockey players formed an active group. The parents of four high-level, male, minor ice hockey players who had recently withdrawn from competitive hockey formed a dropout group. Data collection: Parents completed a structured retrospective survey designed to assess their sons' involvement in organized sport, deliberate play and deliberate practice activities from ages 6 to 13. Data analysis: A complete data-set was available for ages 6 through 13, resulting in a longitudinal data-set spanning eight years. This eight-year range was divided into three levels of development corresponding to the players' progress through the youth ice hockey system. Level one encompassed ages 6–9, level two included ages 10–11 and level three covered ages 12–13. Descriptive statistics were used to report the ages at which the active and dropout players first engaged in select hockey activities. ANOVA with repeated measures across the three levels of development was used to compare the number of sports the active and dropout players were involved in outside of hockey, the number of hours spent in these sports, and involvement in various hockey-related activities. Findings: Results indicated that both the active and dropout players enjoyed a diverse and playful introduction to sport. Furthermore, the active and dropout players invested similar amounts of time in organized hockey games, organized hockey practices, specialized hockey training activities (e.g. hockey camps) and hockey play. However, analysis revealed that the dropout players began off-ice training at a younger age and invested significantly more hours/year in off-ice training at ages 12–13, indicating that engaging in off-ice training activities at a younger age may have negative implications for long-term ice hockey participation. Conclusion: These results are consistent with previous research that has found that early diversification does not hinder sport-specific skill development and it may, in fact, be preferable to early specialization. The active and dropout players differed in one important aspect of deliberate practice: off-ice training activities. The dropout players began off-ice training at a younger age, and participated in more off-ice training at ages 12 and 13 than their active counterparts. This indicates a form of early specialization and supports the postulate that early involvement in practice activities that are not enjoyable may ultimately undermine the intrinsic motivation to continue in sport. Youth sport programs should not focus on developing athletic fitness through intense and routine training, but rather on sport-specific practice, games and play activities that foster fun and enjoyment.

Ukraine and Russia: a hindered rapprochement. OSW Commentary No. 44, 2010-12-15

The policy of rapprochement with Russia that President Victor Yanukovych and his entourage had been actively promoting in the first months of his presidency has slowed down notably. One of the reasons for this lowered pace is that current talks between Russia and Ukraine concern the spheres in which Kyiv is not ready to make concessions to Russia. Despite numerous top-level meetings, recent months have failed to bring a breakthrough in energy issues of key importance. First of all, no compromise was reached in gas issues where the divergence of interests is particularly large and where Ukraine has adopted a tough stance to negotiate the best conditions possible. Even though some agreements were signed during the October session of the inter-governmental committee presided over by the prime ministers (the agreement on linking the two states’ aircraft production and on the joint construction of a nuclear fuel production plant), these resulted from prior agreements. Economic negotiations will continue in the coming months but the observed deadlock is not likely to be broken any time soon. The results of these talks are likely to reflect the interests of both Russia and Ukraine, as well as the competition among Ukrainian business groups, some of which opt for closer cooperation with their Eastern neighbour. Ukraine’s consent to send oil to Belarus along the Odessa-Brody pipeline shows that the government in Kyiv is ready to engage in projects they consider profitable, even those that run counter to Russian interests. Ukraine’s adoption of this stance may trigger irritation in Moscow and lead to a cooling in bilateral relations.

The Fate of Greece in a ‘Genuine Economic and Monetary Union’: Lessons from a small island state. CEPS Hi-Level Brief, 19 June 2015 Friday, 19 June 2015

As the Greek debt drama reaches another supposedly decision point, Daniel Gros urges creditors (and indeed all policy-makers) to think about the long term and poses one key question in this CEPS High-Level Brief: What can be gained by keeping Greece inside the euro area at “whatever it takes”? As he points out, the US, with its unified politics and its federal fiscal transfer system, is often taken as a model for the Eurozone, and it is thus instructive to consider the longer-term performance of an area of the US which has for years been kept afloat by massive transfers, and which is now experiencing a public debt crisis. The entity in question is Puerto Rico, which is an integral part of the US in all relevant economic dimensions (currency, economic policy, etc.). The dismal fiscal and economic performance of Puerto Rico carries two lessons: 1) Keeping Greece in the eurozone by increasing implicit subsidies in the form of debt forgiveness might create a low-growth equilibrium with increasing aid dependency. 2) It is wrong to assume that, further integration, including a fiscal and political union, would be sufficient to foster convergence, and prevent further problems of the type the EU is experiencing with Greece.

After a nuclear deal: What next for Iranian oil and gas? EPC Policy Brief, 23 June 2015

On 2 April in Lausanne, after months of intense negotiations, Iran and the E3+3 (France, Germany, and the UK plus China, Russia, and the US) agreed on a framework deal for the resolution of the nuclear dispute. EU High Representative for Foreign Affairs and Security Policy, Federica Mogherini, and Iran's Foreign Minister, Mohammad Javad Zarif, issued a joint statement announcing that "solutions on key parameters of a Joint Comprehensive Plan of Action" have been found. While differences remain on several issues, including the scope of International Atomic Energy Agency (IAEA) inspections and sanctions relief, the statement has nevertheless raised hopes that a final deal may be reached this summer. If accomplished, an agreement would bring an end to more than a decade of tensions between Iran and the international community. This would result in the lifting of several sanctions, which were adopted against Iran by the United Nations, the EU, and the US. Unsurprisingly therefore, Iran's economy and in particular its energy sector are now the subject of worldwide attention.

High-calcium limestone near Morris, Illinois

At head of title: State of Illinois. Department of registration and education. Division of the State geological survey.

Earth history field trip for high school science teachers : Jacksonville, Illinois, October 22, 1949 /

Gilbert O. Raasch, Conference director; Principal John Agger, Conference host.

High-extraction coal mining in Illinois : effects on crop production, 1985-1987 /

"IMSRP-IV."

Earth history field trip for high school science teachers : Vienna, Illinois, November 5, 1949 /

Gilbert O. Raasch, Conference director; Principal B.W. Hunsaker, Conference host.

Energy recovery from waste : solid waste as supplementary fuel in power plant boilers /

Mode of access: Internet.

Development of fabrication techniques and manufacturing specifications for APPR fuel plates /

"Contract No. AT(30-1)GEN-366 Sposored Task C-50."

Isostatic pressing of UO₂ in high temperature metals /

The hot isostatic pressing process has been applied at temperatures up to 1500°C for the fabrication of high temperature fuel rods composed of UO₂ clad in columbium and UO₂ in iron-aluminum type alloy. The fused UO₂ powder apparently becomes quite plastic at temperatures above 1200°C and can be isostatically compacted at 1500°C to 98% of its theoretical density. Columbian tubes particularly lend themselves to the fabrication of fuel rods by simultaneously compacting and cladding UO₂ powders in the tubes, but the cast iron-aluminum type alloy that was used was unsatisfactory because of its brittleness.

The effect of nuclear radiation on ceramic reactor-fuel materials /

"June 30, 1963."

The effect of nuclear radiation on metallic fuel materials /

"September 30, 1963."

Evaluation of special consumer-homemaking programs in Illinois high schools /

"Prepared for and funded by the Board of Vocational Education and Rehabilitation, Division of Vocational and Technical Education, Special Programs Unit, Springfield, Illinois."