A Mode-Sum Prescription for Vacuum Polarization in Even Dimensions

We present a mode-sum regularization prescription for computing the vacuum polarization of a scalar field in static spherically-symmetric black hole spacetimes in even dimensions. This is the first general and systematic approach to regularized vacuum polarization in higher even dimensions, building upon a previous scheme we developed for odd dimensions. Things are more complicated here since the even-dimensional propagator possesses logarithmic singularities which must be regularized. However, in spite of this complication, the regularization parameters can be computed in closed form in arbitrary even dimensions and for arbitrary metric function $f(r)$. As an explicit example of our method, we show plots for vacuum polarization of a massless scalar field in the Schwarzschild-Tangherlini spacetime for even $d=4,...,10$. However, the method presented applies straightforwardly to massive fields or to nonvacuum spacetimes.Comment: arXiv admin note: text overlap with arXiv:1609.0816

Análisis teórico-práctico de los requisitos y presupuestos de la Ley 100 de 1993 y Ley 797 de 2003

Artículo de investigaciónEste trabajo hace un análisis detallado del Sistema Pensional Colombiano, partiendo de la multiplicidad de regímenes de transición que se han presentado derivadas de las reformas a través del tiempo y la problemática que ello a generado, para luego detallar los requisitos necesarios para obtener las diferentes modalidades de pensión, tanto en el Régimen de Ahorro Individual con Solidaridad RAIS, como en el Régimen de Prima Media con Prestación Definida RPM. Finalmente, contiene un breve análisis del Acto Legislativo 01 de 2005.48 p.INTRODUCCIÓN 1. PLANTEAMIENTO DEL PROBLEMA 2. OBJETO DE LA INVESTIGACION 3. REGIMEN DE TRANSICION 4. LEY 100 DE 1993 5. LEY 797 DE 2003 6. ACTO LEGISLATIVO 01 DE 2005 CONCLUSIONESPregradoAbogad

Memories of studying life in Emory University

<p>Gestational-age specific risks^{<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0155692#t004fn001" target="_blank">*</a>} of adverse perinatal outcomes comparing cesarean-section (130,808 infants) vs. vaginal (n = 232,812 infants) deliveries in twin pregnancies.</p

Manajemen Program Siaran Lokal Aceh TV Dalam Upaya Penyebarluasan Syariat Islam Dan Pelestarian Budaya Lokal

Managing broadcasting management is not easy. Managing the broadcasting business is a difficult and challenging. This research aims to analyze the activity of management and organizational performance ACEH TV television media in an effort to disseminate the Islamic Sharia and Preservation of Local Culture in Aceh. This research is descriptive qualitative. Informants of this research is managing director, program director, executive producer, cameraman / reporter, as well as additional informants Regional Chairman of the Indonesian Broadcasting Commission (KPID) Aceh, Aceh Province Department of Islamic Law, and local media observers. The location of this research is in Banda Aceh, Aceh province. Sampling was done purposively. Data collected through observation, interviews, and documentation. Data were analyzed by analysis of an interactive model of Miles and Huberman. The results showed that the ACEH TV as the medium of television that is broadcasting management ACEH have done according to a local television broadcasting standard. Agenda setting function of mass media performed in the ACEH TV dissemination of Islamic Shariah in Aceh and local culture to influence the people of Aceh to implement Islamic Sharia and also maintain the culture and local wisdom Aceh. It can be seen from all the programs that are aired ACEH TV is a program of local cultural nuances of Islamic law. There are still some shortcomings in running broadcasting broadcasting technology such as lack of equipment that is increasingly sophisticated. The results of image editing is very simple, and some programs presenter still looks stiff when in front of the camera

Screw Dislocations in Complex, Low Symmetry Oxides: Core Structures, Energetics, and Impact on Crystal Growth

Determining the atomic structure and the influence of defects on properties of low symmetry oxides have long been an engineering pursuit. Here, we focus on five thermodynamically reversible monoclinic and orthorhombic polymorphs of dicalcium silicates (Ca₂SiO₃)a key cement constituentas a model system and use atomistic simulations to unravel the interplay between the screw dislocation core energies, nonplanar core structures, and Peierls stresses along different crystallographic planes. Among different polymorphs, we found that the α polymorphs (α-C₂S) has the largest Peierls stress, corresponding to the most brittle polymorph, which make it attractive for grinding processes. Interestingly, our analyses indicate that this polymorphs has the lowest dislocation core energy, making it ideal for reactivity and crystal growth. Generally, we identified the following order in terms of grinding efficiency based on screw dislocation analysis, α-C₂S > α_H-C₂S > α_L-C₂S > β-C₂S > γ-C₂S, and the following order in term of reactivity, α -C₂S > α_L-C₂S > γ-C₂S > α_H-C₂S > β-C₂S. This information, combined with other deformation-based mechanisms, such as twinning and edge dislocation, can provide crucial insights and guiding hypotheses for experimentalists to tune the cement grinding mechanisms and reactivity processes for an overall optimum solution with regard to both energy consumption and performance. Our findings significantly broaden the spectrum of strategies for leveraging both crystallographic directions and crystal symmetry to concurrently modulate mechanics and crystal growth processes within an identical chemical composition

Redesign of glycerol dehydratase from <i>L</i>. <i>reuteri</i>.

<p>A) Overall fold of the glycerol dehydratase monomer and the proposed biological dimer; Stereodrawing of the B) 1,2-PD or C) glycerol bound form of the glycerol dehydratase. Homology modeling for the prediction of tertiary structure of glycerol dehydratase (PduCDE) resulted in a model based on the crystal structure of diol dehydratase-cyanocobalamin complex from <i>Klebsiella oxytoca</i> (1DIO), with sequence similarities and coverages above 42% and 95%, respectively. Quality model assessment of the homology model revealed a QMEAN6-score of 0.83 and a Z-score of -0.53. Ramachandran plot revealed that none of residues were present in the disallowed regions. Color codes for carbon atoms: yellow for adenosylcobalamin (AdoCbl), white for glycerol/1,2-PD, purple for calcium ion. The model figure was generated using Pymol. D) Sequence alignment of large subunit of glycerol dehydratase (PduC) from different bacteria. The numbering scheme follows the amino acid sequences of PduCs. Identical residues in all sequences are highlighted in black and conserved in grey. E) Relative activities of WT/mutant glycerol dehydratases towards different 1,2-diols/glycerol. The data is normalized by taking the activity of the wild-type enzyme towards glycerol as 100%.</p

Results of shake flask studies (36 h) for <i>de novo</i> conversion of 1,2-diols using resting cells of recombinant <i>E</i>. <i>coli</i> strains.

<p>Results of shake flask studies (36 h) for <i>de novo</i> conversion of 1,2-diols using resting cells of recombinant <i>E</i>. <i>coli</i> strains.</p

General reaction scheme for glycerol/1,2-diols conversion to corresponding alcohol and acid by lumen enzymes of <i>pdu</i>-microcompartment.

<p>General reaction scheme for glycerol/1,2-diols conversion to corresponding alcohol and acid by lumen enzymes of <i>pdu</i>-microcompartment.</p

Time course of biotransformation of glycerol and 1,2-PDO using wild-type and mutant <i>L</i>. <i>reuteri</i>.

<p>Time course of biotransformation of glycerol and 1,2-PDO using wild-type and mutant <i>L</i>. <i>reuteri</i>.</p

Kinetic analysis of lumen enzymes towards different substrates.

<p>A) Relative activities of cell free extracts of recombinant <i>E</i>. <i>coli</i> expressing wild type glycerol dehydratase toward glycerol/1,2-diols, using the activity towards glycerol as 100%. B) <i>K</i>_m values for PduQ and PduP towards different aldehydes. Vmax values for C) PduQ and D) PduP.</p