Temperatures of Fragment Kinetic Energy Spectra

Multifragmentation reactions without large compression in the initial state (proton-induced reactions, reverse-kinematics, projectile fragmentation) are examined, and it is verified quantitatively that the high temperatures obtained from fragment kinetic energy spectra and lower temperatures obtained from observables such as level population or isotope ratios can be understood in a common framework.Comment: LaTeX, 7 pages, 2 figures available from autho

Hard Scattering Factorization from Effective Field Theory

In this paper we show how gauge symmetries in an effective theory can be used to simplify proofs of factorization formulae in highly energetic hadronic processes. We use the soft-collinear effective theory, generalized to deal with back-to-back jets of collinear particles. Our proofs do not depend on the choice of a particular gauge, and the formalism is applicable to both exclusive and inclusive factorization. As examples we treat the pi-gamma form factor (gamma gamma* -> pi^0), light meson form factors (gamma* M -> M), as well as deep inelastic scattering (e- p -> e- X), Drell-Yan (p pbar -> X l+ l-), and deeply virtual Compton scattering (gamma* p -> gamma(*) p).Comment: 35 pages, 4 figures, typos corrected, journal versio

The symmetry of the superconducting order parameter in PuCoGa5_5

The symmetry of the superconducting order parameter in single-crystalline PuCoGa$_5$ ($T_{\rm c} = 18.5$ K) is investigated via zero- and transverse- field muon spin relaxation ($\mu$SR) measurements, probing the possible existence of orbital and/or spin moments (time reversal-symmetry violation TRV) associated with the superconducting phase and the in-plane magnetic-field penetration depth $\lambda(T)$ in the mixed state, respectively. We find no evidence for TRV, and show that the superfluid density, or alternatively, $\Delta\lambda(T) = \lambda(T) - \lambda(0)$, are $\propto T$ for $T/T_{\rm c} \leq 0.5$. Taken together these measurements are consistent with an even-parity (pseudo-spin singlet), d-wave pairing state.Comment: 4 pages, 5 figure

Probing the superconducting gap symmetry of PrRu4_{4}Sb12_{12}: A comparison with PrOs4_{4}Sb12_{12}

We report measurements of the magnetic penetration depth $\lambda$ in single crystals of PrRu$_{4}$Sb$_{12}$ down to 0.1 K. Both $\lambda$ and superfluid density $\rho_{s}$ exhibit an exponential behavior for $T$ $<$ 0.5$T_{c}$, with parameters $\Delta$(0)/\textit{k}$_{B}$\textit{T}$_{c}$ = 1.9 and $\lambda(0)$ = 2900 \AA. The value of $\Delta$(0) is consistent with the specific-heat jump value of $\Delta C/\gamma T_{c}$ = 1.87 measured elsewhere, while the value of $\lambda(0)$ is consistent with the measured value of the electronic heat-capacity coefficient $\gamma$. Our data are consistent with PrRu$_{4}$Sb$_{12}$ being a moderate-coupling, fully-gapped superconductor. We suggest experiments to study how the nature of the superconducting state evolves with increasing Ru substitution for Os

Forward genetic screen of human transposase genomic rearrangements

BACKGROUND: Numerous human genes encode potentially active DNA transposases or recombinases, but our understanding of their functions remains limited due to shortage of methods to profile their activities on endogenous genomic substrates. RESULTS: To enable functional analysis of human transposase-derived genes, we combined forward chemical genetic hypoxanthine-guanine phosphoribosyltransferase 1 (HPRT1) screening with massively parallel paired-end DNA sequencing and structural variant genome assembly and analysis. Here, we report the HPRT1 mutational spectrum induced by the human transposase PGBD5, including PGBD5-specific signal sequences (PSS) that serve as potential genomic rearrangement substrates. CONCLUSIONS: The discovered PSS motifs and high-throughput forward chemical genomic screening approach should prove useful for the elucidation of endogenous genome remodeling activities of PGBD5 and other domesticated human DNA transposases and recombinases

Dewetting of thin films on heterogeneous substrates: Pinning vs. coarsening

We study a model for a thin liquid film dewetting from a periodic heterogeneous substrate (template). The amplitude and periodicity of a striped template heterogeneity necessary to obtain a stable periodic stripe pattern, i.e. pinning, are computed. This requires a stabilization of the longitudinal and transversal modes driving the typical coarsening dynamics during dewetting of a thin film on a homogeneous substrate. If the heterogeneity has a larger spatial period than the critical dewetting mode, weak heterogeneities are sufficient for pinning. A large region of coexistence between coarsening dynamics and pinning is found.Comment: 4 pages, 4 figure

Very Low Temperature Tunnelling Spectroscopy in the heavy fermion superconductor PrOs4_4Sb12_{12}

We present scanning tunnelling spectroscopy measurements on the heavy fermion superconductor PrOs$_4$Sb$_{12}$. Our results show that the superconducting gap opens over a large part of the Fermi surface. The deviations from isotropic BCS s-wave behavior are discussed in terms of a finite distribution of values of the superconducting gap.Comment: 4 pages, 4 figure

Evaluasi Pemberian Anastesi Infiltrasi Lokal (LIA) pada Pasien Pasca Operasi Total Knee Arthroplasty di RS Ortopedi Prof. Dr. Dr. R. Soeharso Surakarta

Latar Belakang. Operasi arthroplasti lutut memerlukan penanganan nyeri yang tepat untuk mengurangi ketidaknyamanan pasien dan mempercepat pemulihan. Local infiltration analgesia (LIA) merupakan salah satu modalitas untuk penanganan nyeri dimana diberikan kombinasi berbagai macam obat anti nyeri pada ruang intraartikular dan jaringan sekitar sendi. Tujuan. Mengetahui perbedaan nilai Visual Analog Scale (VAS), perbedaan lama rawat inap, perbedaan nilai Knee Society Score (KSS) pada pasien post operasi TKA yang diberikan LIA dan yang tidak diberikan LIA. Metode. Metode penelitian ini adalah eksperimental dengan uji acak terkontrol (Randomized Controled Trial), post test only group design. Sample berupa total sampling dari pasien osteoartritis lutut dengan status fisik American Society of Anesthesiologis (ASA) I-II, usia 50 - 75 tahun yang menjalani operasi TKA satu sisi dengan satu operator dan anastesi regional dalam kurun waktu Agustus 2016 – Desember 2016. Sample terbagi menjadi 2 kelompok, dimana satu kelompok coba diberikan LIA dengan Levobupivacain, dan kelompok kontrol. Variabel independen pada kelompok coba adalah pasien OA knee yang dilakukan TKA diberikan LIA dengan Buvipacain 100 mg sesaat sebelum penjahitan luka operasi. Variable independen pada kelompok kontrol adalah pasien OA knee yang dilakukan TKA yang tidak diberikan LIA sesaat sebelum penjahitan luka operasi. Variabel dependennya berupa skala nyeri diniliai menggunakan Visible Analog Scale (VAS) yang dinilai pada interval waktu 12 jam, 24 jam, 36 jam, dan 48 jam setelah dilakukan injeksi Anestesi Infiltrasi Lokal, lama perawatan di rumah sakit (Length of Stay) yang dihitung sejak pasien dilakukan operasi TKA hingga pasien dibolehkan pulang dan skor fungsional yang dihitung dengan Knee Society Score (KSS) setelah 3 bulan pasca operasi. Hasil: Sebanyak 64 pasien telah dilakukan analisa, didapatkan 14 pasien pria dan 50 pasien wanita. Usia rata-rata adalah 60,87 tahun. Terdapat perbedaan secara signifikan (p = 0,00) pada kelompok yang diberikan LIA untuk nilai nyeri pasca operasi dibandingkan dengan kelompok kontrol, dimana nilai VAS yang lebih rendah pada kelompok yang diberikan LIA. Kesimpulan: Pada penelitian ini dapat disimpulkan bahwa LIA dengan Levobupivakain berpengaruh dalam menurunkan nyeri pasca operasi, mempersingkat lama rawat inap di Rumah Sakit serta mempunyai functional outcome yang lebih baik pada pasien dengan osteoartritis lutut yang dilakukan operasi TKA di RS Ortopedi Prof. Dr. R. Soeharso Surakarta

Final State Rescattering and Color-suppressed \bar B^0-> D^{(*)0} h^0 Decays

The color-suppressed \bar B^0-> D^{(*)0}\pi^0, D^{(*)0}\eta, D^0\omega decay modes have just been observed for the first time. The rates are all larger than expected, hinting at the presence of final state interactions. Considering \bar B^0-> D^{(*)0}\pi^0 mode alone, an elastic D^{(*)}\pi -> D^{(*)}\pi rescattering phase difference \delta \equiv \delta_{1/2} - \delta_{3/2} \sim 30^\circ would suffice, but the \bar B^0-> D^{(*)0}\eta, D^0\omega modes compel one to extend the elastic formalism to SU(3) symmetry. We find that a universal a_2/a_1=0.25 and two strong phase differences 20^\circ \sim \theta < \delta < \delta^\prime \sim 50^\circ can describe both DP and D^*P modes rather well; the large phase of order 50^\circ is needed to account for the strength of {\it both} the D^{(*)0}\pi^0 and D^{(*)0}\eta modes. For DV modes, the nonet symmetry reduces the number of physical phases to just one, giving better predictive power. Two solutions are found. We predict the rates of the \bar B^0-> D^{+}_s K^-, D^{*+}_s K^-, D^0\rho^0, D^+_s K^{*-} and D^0\phi modes, as well as \bar B^0-> D^{0}\bar K^0, D^{*0}\bar K^0, D^{0}\bar K^{*0} modes. The formalism may have implications for rates and CP asymmetries of charmless modes.Comment: REVTeX4, 18 pages, 5 figures, to appear in Phys. Rev.

Molecular-orbital theory for the stopping power of atoms in the low velocity regime:the case of helium in alkali metals

A free-parameter linear-combination-of-atomic-orbitals approach is presented for analyzing the stopping power of slow ions moving in a metal. The method is applied to the case of He moving in alkali metals. Mean stopping powers for He present a good agreement with local-density-approximation calculations. Our results show important variations in the stopping power of channeled atoms with respect to their mean values.Comment: LATEX, 3 PostScript Figures attached. Total size 0.54