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Conductive clothing are a mandatory tool to assure the safety of live line working when the bare hand technique is used. This is particularly true for the maintenance of UHV lines. In this work we discuss some tests performed to determine the shielding characteristics of facial masks. Some numerical simulations have been performed to assess how much of the tests prescribed by the IEC 60895 standard are cautionary.

In the first part we review some topological and algebraic aspects in the theory of Artin and Coxeter groups, both in the finite and infinite case (but still, finitely generated). In the following parts, among other things, we compute the Schwartz genus of the covering associated to the orbit space for all affine Artin groups. We also give a partial computation of the cohomology of the braid group with non-abelian coefficients coming from geometric representations. We introduce an interesting class of "sheaves over posets", which we call "weighted sheaves over posets", and use them for explicit computations., arXiv admin note: text overlap with arXiv:1404.2392. Proceedings of Configuration spaces: geometry, combinatorics and topology, CRM E.De Giorgi, 2010, Edizioni della Scuola Normale Superiore

Let $(W,S)$ be a Coxeter system, $S$ finite, and let $G_{W}$ be the associated Artin group. One has configuration spaces $Y,\ Y_{W},$ where $G_{W}=\pi_1(Y_{W}),$ and a natural $W$-covering $f_{W}:\ Y\to Y_{W}.$ The Schwarz genus $g(f_{W})$ is a natural topological invariant to consider. In this paper we generalize this result by computing the Schwarz genus for a class of Artin groups, which includes the affine-type Artin groups. Let $K=K(W,S)$ be the simplicial scheme of all subsets $J\subset S$ such that the parabolic group $ W_J $ is finite. We introduce the class of groups for which $dim(K)$ equals the homological dimension of $K,$ and we show that $g(f_{W})$ is always the maximum possible for such class of groups. For affine Artin groups, such maximum reduces to the rank of the group. In general, it is given by $dim(X_{W})+1,$ where $ X_{ W}\subset Y_{ W}$ is a well-known $CW$-complex which has the same homotopy type as $ Y_{ W}.$, Comment: To appear in Atti Accad. Naz. Lincei Rend. Lincei Mat. Appl

Objective: To investigate the efficacy of gadobenate dimeglumine (GdBOPTA) enhanced MR imaging for the detection of liver lesions in patients with primary malignant hepatic neoplasms. Materials and Methods: Thirty-one patients with histologically proven primary malignancy of the liver were evaluated before and after administration of GdBOPTA at dose 0.05 or 0.10 mmol/kg. T1-weighted spin echo (T1W-SE) and gradient echo (T1W-GRE) images were evaluated for lesion number, location, size and confidence by three off-site independent reviewers and the findings were compared to reference standard imaging (intraoperative ultrasound, computed tomography during arterial portography or lipiodol computed tomography). Results were analyzed for significance using a two-sided McNemar’s test. Results: More lesions were identified on Gd-BOPTA enhanced images than on unenhanced images and there was no significant difference in lesion detection between either concentration. The largest benefit was in detection of lesions under 1 cm in size (7 to 21, 9 to 15, 16 to 18 for reviewers A, B, C respectively). In 68% of the patients with more than one lesion, Gd-BOPTA increased the number of lesions detected. Conclusion: Liver MR imaging after Gd-BOPTA increases the detection of liver lesions in patients with primary malignant hepatic neoplasm.

Carboxypeptidase from the archaebacterium Sulfolobus solfataricus is heat stable with an optimal enzyme activity at 85 °C (Colombo et al., 1992). However in the absence of glycerol and beta-mercaptoethanol, at 50 °C, the enzyme undergoes a slow thermal inactivation upon dilution in an aqueous buffer at pH 6.5. This loss of activity can be inhibited when the enzyme is maintained at high pressure. At higher temperatures, higher pressures (up to 400 MPa) are required to maintain the enzyme in its active state.

Este artículo contiene el ciclo de vida de una contraseña, que va desde la generación hasta su tiempo de expiración. Adicionalmente, se presenta una política de gestión de contraseñas que contiene las pautas necesarias para generar e implementar claves seguras para el usuario final manteniendo su usabilidad, con el objetivo de mejorar la seguridad de los sistemas de información y capacitar a estos usuarios en cuanto a la protección de los datos de la organización.

Objetivo. Determinar la presencia de levaduras en la microbiota subgingival en pacientes adultos con periodontitis. Métodos. Estudio transversal, descriptivo que evaluó 26 pacientes diagnosticados clínica y radiográficamente con periodontitis crónica de leve a severa, teniendo en cuanta la clasificación de Armitage de 1999. A cada paciente se le tomaron muestras subgingivales de los 4 sitios periodontalmente más afectados con el fin de cuantificar e identificar la presencia de levaduras en las bolsas periodontales, mediante cultivo en agar Sabouraud y el sistema de identificación API 20 AUX® (Remel). Se realizó un análisis descriptivo, mediante el programa Stata ver 11.0, para determinar la distribución de frecuencias de variables categóricas y rangos de las variables numéricas. Resultados. El rango de edad de los pacientes fue entre 36 y 66 años, el diagnóstico más prevalente fue periodontitis crónica severa (50%), seguida por moderada (30,8%) y leve (19,2%). En cuanto al estudio microbiológico se identificó Candida albicans en 2 (7,7%) pacientes. Conclusiones. Se encontró una baja prevalencia de Candida albicans en las muestras subgingivales de pacientes adultos con periodontitis, sin embargo esta la presencia de Candida albicans podría estar relacionada con tratamientos periodontales con respuesta negativa hacia este.

International audience; A more precise knowledge of the pressure field induced by a high-power spark is essential to estimate the mechanical damages that a lightning strike can induce near the impact point. In this work we propose a multiscale approach to validate a numerical magneto-hydro-dynamic (MHD) model that can predict the pressure field when a very high-power discharge is considered. Two simplified models for the arc resistance are considered and their respective results are compared. A brief analysis regarding the numerical issues involved in the solution of a very high temperature gas is included. The numerical code has been validated against the experimental data of a short-arc discharge using a current waveform prescribed by the aeronautical standards. Our study shows that a strong shock wave is generated in the first power peak and this travels away from the arc column maintaining a relatively high strength a few tens of centimeters away. The pressure in the arc region remains high for the whole discharge period.

The role of an anti-intrusion bar for automotive use is to absorb the kinetic energy of the colliding bodies that is partially converted into internal work of the bodies involved in the crash. The aim of this paper is to investigate the performances of a new kind of anti-intrusion bars for automotive use, filled with metallic foams. The reason for using a cellular material as a filler deals with its capacity to absorb energy during plastic deformation, while being lightweight. The study is the evolution of a previous paper presented by the authors at Esaform 2010 and will present new results and findings. It is conducted by evaluating some key technical issues of the manufacturing problem and by conducting experimental and numerical analyses. The evaluation of materials and shapes of the closed sections to be filled is made in the perspective of a car manufacturer (production costs, weight reduction, space availability in a car door, etc.). Experimentally, foams are produced starting from an industrial aluminium precursor with a TiH{sub 2} blowing agent. Bars are tested in three point bending, in order to evaluate their performances in terms of force-displacement response and other specific performance parameters. In order to understand themore » role of interface between the inner surface of the tube and the external surface of the foam, different kinds of interface are tested.« less

User experience design professionals have established tools and processes for creating user interfaces. However some new interaction paradigms differ so greatly from their predecessors that established methodology is inadequate. Mobile augmented reality (AR) is one such paradigm. Viewing and interacting with 3D registered graphics that are overlaid in the user’s camera view creates novel design challenges.

A proteinase was purified to electrophoretic homogeneity from crude extracts of the thermoacidophilic archaebacterium Sulfolobus solfataricus. Molecular mass values assessed by SDS-PAGE and gel filtration were 54 and 118 kDa, respectively, which points to a dimeric structure of the molecule. An isoelectric point of 5.6 was also determined. The enzyme behaved as a chymotrypsin-like serine proteinase, as shown by the inhibitory effects exerted by phenylmethanesulfonyl fluoride, 3,4-dichloroisocoumarin, tosylphenylalaninechloromethyl ketone and chymostatin. Consistently with the inhibition pattern, the enzyme cleaved chromogenic substrates at the carboxyl side of aromatic or bulky aliphatic amino acids; however, it effectively attacked only a small number of such substrates, thus, displaying a specificity much narrower than and clearly different from that of chymotrypsin. This was confirmed by its inability to digest a set of natural substrate proteins, as well as insulin chains A and B; only after alkylation casein was degraded to some extent. Proteinase activity was significantly stimulated by Mn2+ which acted as a mixed-type nonessential activator. The enzyme also displayed a broad pH optimum in the range 6.5-8.0. Furthermore, it was completely stable up to 90 degrees C; above this temperature it underwent first-order thermal inactivation with half-lives ranging from 342 min (92 degrees C) to 7 min (101 degrees C). At 50 degrees C it could withstand 6 M urea and, to some extent, different organic solvents; however, at 95 degrees C it was extensively inactivated by all of these compounds. None of the chemical physical properties of the enzyme, including amino-acid analysis, provided evidence of a possible relation to other well-known microbial serine proteinases.

The present work deals with two aspects of the geological simulation of sedimentary basins: the modeling of their structural evolution and the hydrocarbon generation and expulsion. The sedimentary basin layers are modeled as stratified incompressible fluids and an original scheme is presented to solve this problem. For what concerns hydrocarbon generation the proposed numerical model includes differential retention effects and it is thus able to describe fractionation effects providing correct estimates of the expulsion time and the chemical composition of the expelled oil and gas.

The number of "intelligent" devices with computing and communication capabilities, that surround people in the home environment, are continuously growing. This kind of devices is characterized by software running on them but this needs to be configured and updated from time to time. The user who wants to configure and update these devices has to face the variety of devices configuration procedures and to find the software updates from different manufacturers. This intrinsic difficulty in configuring and updating devices, together with their spreading, make the necessity of an automatic configuration system grow. The COMANCHE project has proposed a complete architecture for software configuration management in the home environment, which aims to overcome the heterogeneity of configuration and upgrading procedures and will allow the deployment of value added services. This paper will give a screenshot of the defined architecture, comparing it also with other configuration and updating existing solutions, like OMA and TR-69.

In this paper we present a numerical tool to simulate dynamics of stratified sedimentary basins, i.e. depressions on the Earth's surface filled by sediments. The basins are usually complicated by crustal deformations and faulting of the sediments. The balance equations, the non-Newtonian rheology of the sediments, and the depth-porosity compaction laws describe here a model of basin evolution. We propose numerical schemes for the basin boundary movement and for the fault tracking. In addition, a time splitting algorithm is employed to reduce the original model into some simpler mathematical problems. The numerical stability and the other features of the developed methodology are shown using simple test cases and some realistic configurations of sedimentary basins.

The late Miocene continental successions of the Baccinello-Cinigiano basin (Grosseto), one of the longest and most continuous vertebrate-bearing continental successions in the Neogene Italian record, yielded at least four superimposed vertebrate assemblages bracketed in the time span 8.3 - 6.4 Ma. The Baccinello-Cinigiano basin is famous for recording endemic vertebrate assemblages that include the youngest European Miocene hominoid, Oreopithecus bambolii. The late Miocene endemic vertebrate fauna known as the Baccinello V0 assemblage is the oldest vertebrate fauna within the Baccinello-Cinigiano basin succession, being correlated to the European mammal Neogene unit MN11. Recent field surveys along the Trasubbie river allowed studying in detail the basal Baccinello-Cinigiano sedimentary succession, and sampling fossiliferous level bearing microvertebrates along the small creek Fosso della Fittaia. The sample “Fosso della Fittaia 2013” yielded about 170 fossil remains improving our documentation of the oldest vertebrate assemblages from the Baccinello-Cinigian basin. As far as rodents are concerned, in addition to the already recognized murid Huerzelerimys and glirid Anthracoglis, a few dental remains are assigned to a new genus and species of giant dormouse. It is further worth noting the occurrence in the sample of shrew remains (the first described from the Baccinello-Cinigiano basin) identified as cf. Lartetium. The latter attests the presence of a crocidosoricine in the Fosso della Fittaia 2013 assemblage, postdating the youngest known occurrences of the subfamily by at least 1 my. The vertebrate assemblage is completed by a diverse herpetofauna and the first fish remains reported from the basin., Rivista Italiana di Paleontologia e Stratigrafia (Research In Paleontology and Stratigraphy), Vol 122, No 2 (2016)

In this work, we observe plasmon-induced hot electron extraction in a heterojunction between indium tin oxide nanocrystals and monolayer molybdenum disulfide. We study the sample with ultrafast differential transmission, exciting the sample at 1750 nm where the intense localized plasmon surface resonance of the indium tin oxide nanocrystals is and where the monolayer molybdenum disulfide does not absorb light. With the excitation at 1750 nm, we observe the excitonic features of molybdenum disulfide in the visible range, close to the exciton of molybdenum disulfide. Such a phenomenon can be ascribed to a charge transfer between indium tin oxide nanocrystals and monolayer molybdenum disulfide upon plasmon excitation. These results are a first step toward the implementation of near-infrared plasmonic materials for photoconversion.