Cut Vertices and Semi-Inclusive Deep Inelastic Processes

Cut vertices, a generalization of matrix elements of local operators, are revisited, and an expansion in terms of minimally subtracted cut vertices is formulated. An extension of the formalism to deal with semi-inclusive deep inelastic processes in the target fragmentation region is explicitly constructed. The problem of factorization is discussed in detail.Comment: LaTex2e, 24 pages including 17 postscript figure

Magnetic, magnetocaloric and magnetotransport properties of RSn_{1+x}Ge_{1-x} compounds (R=Gd, Tb, Er; x=0.1)

We have studied the magnetic, magnetocaloric and magnetotransport properties of RSn1+xGe1-x(R=Gd, Tb, Er; x=0.1) series by means of magnetization, heat capacity and resistivity measurements. It has been found that all the compounds crystallize in the orthorhombic crystal structure described by the centrosymmetric space group Cmcm (No. 63). The magnetic susceptibility and heat capacity data suggest that all the compounds are antiferromagnetic. Large negative values of {\theta}p in case of GdSn1.1Ge0.9 and TbSn1.1Ge0.9 indicate that strong antiferromagnetic interactions are involved, which is also reflected in the magnetization isotherms. On the other hand ErSn1.1Ge0.9 shows weak antiferromagnetic interaction. The heat capacity data have been analyzed by fitting the temperature dependence and the values of {\theta}D and {\gamma} have been estimated. Among these three compounds, ErSn1.1Ge0.9 shows considerable magnetic entropy change of 9.5 J/kg K and an adiabatic temperature change of 3.2 K for a field of 50 kOe. The resistivity data in different temperature regimes have been analyzed and the dominant contributions have been identified. All the compounds show small but positive magnetoresistance.Comment: 23 pages,11 figure

Executive Summary: Understanding the lives of adolescents and young adults (UDAYA) in Uttar Pradesh, India (2015–16)

A program of research titled, “Understanding the lives of adolescents and young adults (UDAYA) in Bihar and Uttar Pradesh,” implemented by the Population Council, aimed to understand the factors that determine healthy transitions from childhood to adolescence and adulthood. The goal of UDAYA is to establish the levels, patterns, and trends in the situation of younger (10–14) and older (15–19) adolescents and assess factors that influence the quality of transitions they make. The specific objectives of UDAYA are: 1) to explore the situation of adolescents, with a focus on assessing the extent to which both younger and older adolescents have acquired a set of assets that can help them make a healthy, safe, and successful transition from adolescence to young adulthood in the states of Bihar and Uttar Pradesh; 2) to describe the extent to which the situation of adolescents has changed over time; and 3) to assess factors that determine the accumulation or loss of assets and the quality of transitions from adolescence to young adulthood. This report presents findings from Uttar Pradesh

Understanding the lives of adolescents and young adults (UDAYA) in Uttar Pradesh, India (2015–16)

The goal of the program of research titled “Understanding the lives of adolescents and young adults (UDAYA) in Bihar and Uttar Pradesh” is to establish the levels, patterns, and trends in the situation of younger (10–14) and older (15–19) adolescents and to assess factors that influence the quality of transitions they make. The study is designed to provide robust insights on how investments in adolescents influence their life course by the time they reach young adulthood; enable evidence-based decisions on the types of programs worthy of scale-up; and furnish important baseline indicators against which the long-term impact of programs can be measured. This report focuses on the findings from the first round of cross-sectional surveys of adolescents conducted in Uttar Pradesh, which confirm that adolescents are a heterogeneous group with correspondingly diverse needs. The findings of UDAYA show that adolescents face numerous challenges in making the transition to adulthood. The report identifies and discusses several programmatic areas for action to improve the situation of adolescents

Finite size scaling in the 2D XY-model and generalized universality

In recent works (BHP), a generalized universality has been proposed, linking phenomena as dissimilar as 2D magnetism and turbulence. To test these ideas, we performed a MC study of the 2D XY-model. We found that the shape of the probability distribution function for the magnetization M is non Gaussian and independent of the system size --in the range of the lattice sizes studied-- below the Kosterlitz-Thoules temperature. However, the shape of these distributions does depend on the temperature, contrarily to the BHP's claim. This behavior is successfully explained by using an extended finite-size scaling analysis and the existence of bounds for M.Comment: 7 pages, 5 figures. Submitted to Phys. Rev. Lett. Details of changes: 1. We emphasized in the abstract the range of validity of our results. 2. In the last paragraph the temperature dependence of the PDF was slightly re-formulate

Testing the multipole structure of compact binaries using gravitational wave observations

We propose a novel method to test the consistency of the multipole moments of compact binary systems with the predictions of general relativity (GR). The multipole moments of a compact binary system, known in terms of symmetric and trace-free tensors, are used to calculate the gravitational waveforms from compact binaries within the post-Newtonian (PN) formalism. For nonspinning compact binaries, we derive the gravitational wave phasing formula, in the frequency domain, parametrizing each PN order term in terms of the multipole moments which contribute to that order. Using GW observations, this parametrized multipolar phasing would allow us to derive the bounds on possible departures from the multipole structure of GR and hence constrain the parameter space of alternative theories of gravity. We compute the projected accuracies with which the second-generation ground-based detectors, such as the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO), the third-generation detectors such as the Einstein Telescope and Cosmic Explorer, as well as the space-based detector Laser Interferometer Space Antenna (LISA) will be able to measure these multipole parameters. We find that while Advanced LIGO can measure the first two or three multipole coefficients with good accuracy, Cosmic Explorer and the Einstein Telescope may be able to measure the first four multipole coefficients which enter the phasing formula. Intermediate-mass-ratio inspirals, with mass ratios of several tens, in the frequency band of the planned space-based LISA mission should be able to measure all seven multipole coefficients which appear in the 3.5PN phasing formula. Our finding highlights the importance of this class of sources for probing the strong-field gravity regime. The proposed test will facilitate the first probe of the multipolar structure of Einstein’s general relativity

Robust Model-Checking of Linear-Time Properties in Timed Automata

International audienceFormal verification of timed systems is well understood, but their \emphimplementation is still challenging. Recent works by Raskin \emphet al. have brought out a model of parameterized timed automata that can be used to prove \emphimplementability of timed systems for safety properties. We define here a more general notion of robust model-checking for linear-time properties, which consists in verifying whether a property still holds even if the transitions are slightly delayed or expedited. We provide PSPACE algorithms for the robust model-checking of Büchi-like and LTL properties. We also verify bounded-response-time properties

Application of the Maximum Entropy Method to the (2+1)d Four-Fermion Model

We investigate spectral functions extracted using the Maximum Entropy Method from correlators measured in lattice simulations of the (2+1)-dimensional four-fermion model. This model is particularly interesting because it has both a chirally broken phase with a rich spectrum of mesonic bound states and a symmetric phase where there are only resonances. In the broken phase we study the elementary fermion, pion, sigma and massive pseudoscalar meson; our results confirm the Goldstone nature of the pi and permit an estimate of the meson binding energy. We have, however, seen no signal of sigma -> pi pi decay as the chiral limit is approached. In the symmetric phase we observe a resonance of non-zero width in qualitative agreement with analytic expectations; in addition the ultra-violet behaviour of the spectral functions is consistent with the large non-perturbative anomalous dimension for fermion composite operators expected in this model.Comment: 25 pages, 13 figure

Understanding the lives of adolescents and young adults (UDAYA) in Bihar, India

The goal of the “Understanding the lives of adolescents and young adults (UDAYA) in Bihar and Uttar Pradesh” program is to establish the levels, patterns, and trends in the situation of younger (10–14) and older (15–19) adolescents and to assess factors that influence the quality of transitions they make. The study is designed to provide robust insights on how investments in adolescents influence their life course by the time they reach young adulthood; enable evidence-based decisions on the types of programs worthy of scale-up; and furnish important baseline indicators against which the long-term impact of programs can be measured. This report focuses on the findings from the first round of cross-sectional surveys of adolescents conducted during January–July 2016 in Bihar, which confirm that adolescents are a heterogeneous group with correspondingly diverse needs. While large proportions of adolescents are healthy and have been to school, our findings confirm that they face numerous challenges in making the transition to adulthood. The report identifies and discusses several programmatic areas for action to improve the situation of adolescents

Executive Summary—Understanding the lives of adolescents and young adults (UDAYA) in Bihar, India

A program of research titled, “Understanding the lives of adolescents and young adults (UDAYA) in Bihar and Uttar Pradesh,” implemented by the Population Council, aimed to understand the factors that determine healthy transitions from childhood to adolescence and adulthood. The goal of UDAYA is to establish the levels, patterns, and trends in the situation of younger (10–14) and older (15–19) adolescents and assess factors that influence the quality of transitions they make. The specific objectives of UDAYA are: 1) to explore the situation of adolescents, with a focus on assessing the extent to which both younger and older adolescents have acquired a set of assets that can help them make a healthy, safe, and successful transition from adolescence to young adulthood in the states of Bihar and Uttar Pradesh; 2) to describe the extent to which the situation of adolescents has changed over time; and 3) to assess factors that determine the accumulation or loss of assets and the quality of transitions from adolescence to young adulthood. This report presents findings from Bihar