Half-BPS SU(N) Correlators in N=4 SYM

In this note we study half-BPS operators in N=4 super Yang-Mills for gauge group SU(N) at finite N. In particular we elaborate on the results of hep-th/0410236, providing an exact formula for the null basis operators algorithmically constructed there. For gauge groups U(N) and SU(N) we show that this basis is dual to the basis of multi-trace operators with respect to the two point function. We use this to extend the results of hep-th/0611290 concerning factorisation and probabilities from U(N) to SU(N). We also give a construction for a separate diagonal basis of the SU(N) operators in terms of the higher Hamiltonians of the complex matrix model reduction of this sector.Comment: LaTeX, 15 pages; comments added on large N limi

Skylab astronaut life support assembly

A comparative study was performed to define an optimum portable life support system for suited operations inside and outside the Skylab Program. Emphasis was placed on utilization of qualified equipment, modified versions of qualified equipment, and new systems made up to state-of-the-art components. Outlined are the mission constraints, operational modes, and evaluation ground rules by which the Skylab portable life support system was selected and the resulting design

City flight migration patterns in the East Midlands

This paper investigates migration to and from the Three Cities of Derby, Leicester and Nottingham. It investigates whether these cities lose more migrants than they gain from more rural parts of the city-regions and the extent to which these flows impact on the demographic profiles of the Three Cities

Tensor interaction contributions to single-particle energies

We calculate the contribution of the nucleon-nucleon tensor interaction to single-particle energies with finite-range $G$ matrix potentials and with zero-range Skyrme potentials. The Skx Skyrme parameters including the zero-range tensor terms with strengths calibrated to the finite-range results are refitted to nuclear properties. The fit allows the zero-range proton-neutron tensor interaction as calibrated to the finite-range potential results and that gives the observed change in the single-particle gap $\epsilon$(h$_{11/2}$)-$\epsilon$(g$_{7/2}$) going from $^{114}$Sn to $^{132}$Sn. However, the experimental $\ell$ dependence of the spin-orbit splittings in $^{132}$Sn and $^{208}$Pb is not well described when the tensor is added, due to a change in the radial dependence of the total spin-orbit potential. The gap shift and a good fit to the $\ell$-dependence can be recovered when the like-particle tensor interaction is opposite in sign to that required for the $G$ matrix.Comment: 5 pages, 4 figures, accepted for publication as Rapid Communication in Physical Review

A Cross-Cultural Look at Co-rumination, Self-Disclosure, Friendship, Relational Concerns and Emotional Adjustment

Rose (2002) first defined co-rumination as extensive problem-focused talk, and it has been found to be associated with both depression/anxiety and friendship quality. However, our understanding of co-rumination is limited by an exclusive focus on Western samples of mostly children/adolescents. Thus, the primary aim of the current study is to investigate the construct validity of co-rumination in an Asian sample by examining associations among rumination, co-rumination, emotional adjustment, self-disclosure and friendship quality. We predict that Asians will report lower levels of co-rumination, and we expect gender differences in co-rumination to replicate cross-culturally. 224 Asian students (69 men, 153 women) from universities in Hong Kong and East China and 118 U.S. students (43 men, 75 women) from a private college in the Northwest participated in the study. Expected gender differences were found. Significant positive relationships emerged between co-rumination, self-disclosure, friendship quality, and rumination in both samples. Asian students reported significantly higher levels of co-rumination but lower levels of self-disclosure. Asians reported higher levels of relational concerns than U.S students. Relational concerns partially mediated cultural differences in self-disclosure but not in co-rumination. Surprisingly, co-rumination was unrelated to adjustment and did not predict unique variance in anxiety/depression beyond the effects of rumination. The current findings highlight the complexity of co-rumination as an interpersonal process vs. support-seeking functions in Asians. With limited research on co-rumination in emerging adults, it is unknown whether unique sampling issues or a meaningful developmental shift accounts for the lack of associations between co-rumination and anxiety/depression among U.S. students. Regardless, future longitudinal research should incorporate strategies (e.g., observational data, time sampling) that extend beyond self-report. These designs promise to sharpen our understanding as they more fully capture the dynamic forces at play in co-rumination that may vary across time and culture