TASI 2009 Lectures: Searching for Unexpected Physics at the LHC

These TASI lectures consider low mass hidden sectors from Hidden Valleys, Quirks and Unparticles. We show how each corresponds to a different limit of the same class of models: hidden sectors with non-abelian gauge groups with mass gaps well below a TeV that communicate to the Standard Model through weak scale suppressed higher dimension operators. We provide concrete examples of such models and discuss LHC signatures. Lastly we turn to discussing the application of Hidden Valleys to dark matter sectors.Comment: 35 pages, 21 figure

The View from the Front

A creative piece detailing the personal and public history of a small Pennsylvania town, specifically dealing with its crimes and their effect on the collective memory and atmosphere of the area

What\u27s in a Name: Cable Systems, FilmOn, and Judicial Consideration of the Applicability of the Copyright Act\u27s Compulsory License to Online Broadcasters of Cable Content

The way we consume media today is vastly different from the way media was consumed in 1976, when the Copyright Act created the compulsory license for cable systems. The compulsory license allowed cable systems, as defined by the Copyright Act, to pay a set fee for the right to air television programming rather than working out individual deals with each group that owned the copyright in the programming, and helped make television more widely accessible to the viewing public. FilmOn, a company that uses a mini-antenna system to capture and retransmit broadcast network signals, is now seeking access to the compulsory license. In three concurrent legal cases in New York, California, and D.C., FilmOn argues that it meets the statutory requirements to classify as a cable system. This Issue Brief examines the legal history of cable systems and considers the effects of agency influence, policy concerns, and the lack of judicial or congressional resolution regarding FilmOn’s contested legal status

Attorney Fee Shifting: A Bibliography

Marmara Sea and Black Sea connected with renowned Bosporus surround Istanbul, the city, which owns the privilege of bridging Europe and Asia. Besides such inland seas; forests and wetlands fragmented around and in the city maintain the natural cycle in the region. However, Istanbul as a fast developing urban area witnesses environmental issues like many other urban areas in global scale. Rapid economic and population growth of the city increase the pressure on above mentioned natural resources. Sustainable development of built environment is one of the best solutions in order to mitigate environmental damages of urban areas. The solution comes with green construction projects and systems yet the city and the market itself have barriers to block or slow the process of sustainable development. Identification of such barriers and reviewing international sustainable development practices paves the way for generating recommendations for environmentally friendly urban expansion in Istanbul. Survey targeting market professionals was conducted to identify sustainable development barriers in Istanbul and in order to address such barriers the thesis refers to conducted interviews and international practices presented in the literature review. The thesis draws economic, market and governmental recommendations which are particularly focused on financial incentives, raising awareness and enacting green laws involving all stakeholders of construction and real estate market

Multi-Component Dark Matter

We explore multi-component dark matter models where the dark sector consists of multiple stable states with different mass scales, and dark forces coupling these states further enrich the dynamics. The multi-component nature of the dark matter naturally arises in supersymmetric models, where both R parity and an additional symmetry, such as a $Z_2$, is preserved. We focus on a particular model where the heavier component of dark matter carries lepton number and annihilates mostly to leptons. The heavier component, which is essentially a sterile neutrino, naturally explains the PAMELA, ATIC and synchrotron signals, without an excess in antiprotons which typically mars other models of weak scale dark matter. The lighter component, which may have a mass from a GeV to a TeV, may explain the DAMA signal, and may be visible in low threshold runs of CDMS and XENON, which search for light dark matter.Comment: 4 pages, no figures. v2: paper shortened to letter length; modified dark matter spectru

A New Technique for Determining Europium Abundances in Solar-Metallicity Stars

We present a new technique for measuring the abundance of europium, a representative r-process element, in solar-metallicity stars. Our algorithm compares LTE synthetic spectra with high-resolution observational spectra using a chi-square-minimization routine. The analysis is fully automated, and therefore allows consistent measurement of blended lines even across very large stellar samples. We compare our results with literature europium abundance measurements and find them to be consistent; we also find our method generates smaller errors.Comment: 10 pages, 7 figure

Differences in Disability among Older Women and Men in Egypt and Tunisia

[Excerpt] Research on child survival and health has indicated disparities between boys and girls in selected Middle Eastern countries. Health disparities in later life are understudied in this region. In this article, we examine differences between women and men in later-life activity limitation in Egypt and Tunisia. Difficulty executing physical tasks is more common for women than for men in both study sites, although differences are smaller after adjustment for underlying illness. Differences in the difficulty of executing physical tasks also are sensitive to environmental controls in variable ways across the study sites. The findings caution against the sole use of reported disability in comparative studies of gender and agin

The Market Microstructure of Central Bank Intervention

One of the great unknowns in international finance is the process by which new information influences exchange rate behavior. This paper focuses on one important source of information to the foreign exchange markets, the intervention operations of the G-3 central banks. Previous studies using daily and weekly foreign exchange rate data suggest that central bank intervention operations can influence both the level and variance of exchange rates, but little is known about how exactly traders learn of these operations and whether intra-daily market conditions influence the effectiveness of central bank interventions. This paper uses high-frequency data to examine the relationship between the efficacy of intervention operations and the 'state of the market' at the moment that the operation is made public to traders. The results indicate that some traders know that a central bank is intervening at least one hour prior to the public release of the information in newswire reports. Also, the evidence suggests that the timing of intervention operations matter interventions that occur during heavy trading volume and that are closely timed to scheduled macro announcements are the most likely to have large effects. Finally, post-intervention mean reversion in both exchange rate returns and volatility indicate that dealer inventories are affected by market reactions to intervention news.

Does Central Bank Intervention Increase the Volatility of Foreign Exchange Rates?

Since the abandonment of the Bretton Woods system of fixed exchange rates in the early 1970s, exchange rates have displayed a surprisingly high degree of time-conditional volatility. This volatility can be explained statistically using autoregressive conditional heteroscedasticity models, but there remains the question of the economic source of this volatility. Central bank intervention policy may provide part of the explanation. Previous work has shown that central banks have relied heavily on intervention policy to influence the level of exchange rates, and that these operations have, at times, been effective. This paper investigates whether central bank interventions have also influenced the variance of exchange rates. The results from daily and weekly GARCH models of the $/DM and$/Yen rates over the period 1985 to 1991 indicate that publicly known Fed intervention generally decreased volatility over the full period. Further, results indicate that intervention need not be publicly known for it to influence the conditional variance of exchange rate changes. Secret intervention operations by both the Fed and the Bundesbank generally increased exchange rates volatility over the period.