bluuebunny/crossref_metadata_2025 huggingface dataset:
Diabetes Mellitus and Younger Age Are Risk Factors for Hyperphosphatemia in Peritoneal Dialysis Patients
Authors: Imtiaz Rameez , Hawken Steven , McCormick Brendan , Leung Simon , Hiremath Swapnil , Zimmerman Deborah
Published: February 2017

Hyperphosphatemia has been associated with adverse outcomes in patients with end stage kidney disease (ESKD). The purpose of this study was to determine risk factors for hyperphosphatemia in ESKD patients treated with peritoneal dialysis (PD). This information will be used to develop a patient specific phosphate binder application to facilitate patient self-management of serum phosphate. Adult PD patients documented their food, beverage, and phosphate binder intake for three days using a dietitian developed food journal. Phosphate content of meals was calculated using the ESHA Food Processor SQL Software (ESHA Research, Salem, UT, USA). Clinic biochemistry tests and an adequacy assessment (Baxter Adequest program) were done. Univariate logistic regression was used to determine predictors of serum phosphate >1.78 mmol/L. A multivariable logistic regression model was then fit including those variables that achieved a significance level of p < 0.20 in univariate analyses. Sixty patients (38 men, 22 women) completed the protocol; they were 60 ± 17 years old, 50% had a history of diabetes mellitus (DM) and 33% had hyperphosphatemia (PO4 > 1.78 mmol/L). In univariate analysis, the variables associated with an increased risk of hyperphosphatemia with a p-value < 0.2 were male gender (p = 0.13), younger age (0.07), presence of DM (0.005), higher dose of calcium carbonate (0.08), higher parathyroid serum concentration (0.08), lower phosphate intake (0.03), lower measured glomerular filtration rate (0.15), higher phosphate excretion (0.11), and a higher body mass index (0.15). After multivariable logistic regression analysis, younger age (odds ratio (OR) 0.023 per decade, 95% confidence interval (CI) 0.00065 to 0.455; p = 0.012), presence of diabetes (OR 11.40, 95 CI 2.82 to 61.55; p = 0.0003), and measured GFR (OR 0.052 per mL/min decrease; 95% CI 0.0025 to 0.66) were associated with hyperphosphatemia. Our results support that younger age and diabetes mellitus are significant risk factors for hyperphosphatemia. These findings warrant further investigation to determine the potential mechanisms that predispose younger patients and those with DM to hyperphosphatemia.
Capacitive Biosensors and Molecularly Imprinted Electrodes
Authors: Ertürk Gizem , Mattiasson Bo
Published: February 2017

Capacitive biosensors belong to the group of affinity biosensors that operate by registering direct binding between the sensor surface and the target molecule. This type of biosensors measures the changes in dielectric properties and/or thickness of the dielectric layer at the electrolyte/electrode interface. Capacitive biosensors have so far been successfully used for detection of proteins, nucleotides, heavy metals, saccharides, small organic molecules and microbial cells. In recent years, the microcontact imprinting method has been used to create very sensitive and selective biorecognition cavities on surfaces of capacitive electrodes. This chapter summarizes the principle and different applications of capacitive biosensors with an emphasis on microcontact imprinting method with its recent capacitive biosensor applications.
Quantifying River Channel Stability at the Basin Scale
Authors: Soar Philip , Wallerstein Nicholas , Thorne Colin
Published: February 2017

This paper examines the feasibility of a basin‐scale scheme for characterising and quantifying river reaches in terms of their geomorphological stability status and potential for morphological adjustment based on auditing stream energy. A River Energy Audit Scheme (REAS) is explored, which involves integrating stream power with flow duration to investigate the downstream distribution of Annual Geomorphic Energy (AGE). This measure represents the average annual energy available with which to perform geomorphological work in reshaping the channel boundary. Changes in AGE between successive reaches might indicate whether adjustments are likely to be led by erosion or deposition at the channel perimeter. A case study of the River Kent in Cumbria, UK, demonstrates that basin‐wide application is achievable without excessive field work and data processing. However, in addressing the basin scale, the research found that this is inevitably at the cost of a number of assumptions and limitations, which are discussed herein. Technological advances in remotely sensed data capture, developments in image processing and emerging GIS tools provide the near‐term prospect of fully quantifying river channel stability at the basin scale, although as yet not fully realized. Potential applications of this type of approach include system‐wide assessment of river channel stability and sensitivity to land‐use or climate change, and informing strategic planning for river channel and flood risk management.
TVA et taux de marge : une analyse empirique sur données d’entreprises exportatrices françaises
Authors: Andrade Philippe , Carré Martine , Bénassy-Quéré Agnès
Published: February 2017

VAT and Mark-Up Variations : An Empirical Analysis of Corporate Data Provided by French Exporters.

We study how French exporters react to a VAT shock in a destination country. As VAT shocks are by nature almost permanent, exogenous, and without impact on marginal costs, the subsequent price reactionmakes it possible to identify a pure demand-led mark-up adjustment. The results of an analysis of French customs data for 1995-2005 indicate a 67% averagemark-up adjustment for consumer goods. The adjustment is greater for companies, sectors, and destinations with a relatively higher market share. We then use our estimates and the Atkeson-Burstein (2008) theoretical framework to derive the distribution of mark-up adjustments of the various sector-destination pairs.
La productivité de l’industrie agroalimentaire française de 1996 à 2006
Authors: Bontemps Christophe , Maigné Élise , Réquillart Vincent
Published: February 2017

La productivité globale des facteurs de l’industrie agroalimentaire (IAA) française a baissé de 0,4% par an entre 1996 et 2006. Si la productivité des secteurs “ Lait”, “ Boissons” et “ Grains” a peu varié, les pertes de productivité ont été marquées dans les secteurs “ viandes et poisson” et “ autres IAA”. Ces résultats s’expliqueraient par l’importance des consommations intermédiaires, une difficulté à améliorer les rendements de conversion et l’impact du renforcement des normes sanitaires ou environnementales. Une partie de la diminution du prix des consommations intermédiaires a financé le recul de la productivité, l’autre partie étant transmise vers l’aval sous forme de réduction de prix. L’évolution de la productivité des IAA a été comparable en France et dans les principaux pays de l’Union européenne à 15.
Quelques aspects de la biologie de la reproduction et des cycles sexuels chez Bufo regularis Reuss (1934), amphibien anoure
Authors: Pujol Paulette , Exbrayat Jean-Marie
Published: February 2017

Le travail porte sur l'étude d'une population de Bufo regularis, amphibien anoure africain ubiquiste. Les animaux étudiés proviennent de Lomé (Togo) où ils sont soumis à des variations saisonnières marquées. Les cycles des organes génitaux mâles et femelles sont de type continu. La reproduction est déclenchée lorsque la pluviométrie augmente. Un mode de régulation endocrine chez les mâles et les femelles est proposé.
Une espèce de Cerambycidae nouvelle pour la faune de France, Aegomorphus francottei Sama (Coleoptera)
Authors: Allemand Roland , Brustel Hervé , Clary Joël
Published: February 2017

Aegomorphus francottei, a new species of Cerambycidae for the French fauna (Coleoptera)

Aegomorphus francottei, species closely related to A. clavipes and known from the Balkans, is recorded from several places in central and southern France as well as in Rumania. Genitalia and main external morphological features which allow the identification are indicated and illustrated. Knowledge about other forms and species of European and Turkish Aegomorphus are discussed.
Effet de la nourriture sur la longévité de deux Hyménoptères parasitoïdes oophages
Authors: Rohi Latifa , Bourarach Khadija , Chemseddine Mohamed , Pintureau Bernard
Published: February 2017

Effect of food on the longevity of two Hymenopteran egg parasitoids.

The longevity of two egg parasitoids, Trichogramma bourarachae Pintureau et Babault (Hym. Trichogrammatidae) and Telenomus laeviceps Foerster (Hym. Scelionidae) varies in function of the available food. The longevity of T. bourarachae females is maximal (14 -16 days) when they are supplied with honey, honeydew or sweetened solution. The pollen does not present any nutritive value. The T. laeviceps females live twice as long as those of T. bourarachae when they are supplied with sweetened solution, and 4.6 times when they are supplied with honey. Whatever the feeding source, males of T. laeviceps present a longevity shorter than females.
Sur les genres Panotrogus Reitter, 1902 et Pseudopanotrogus Petrovitz, 1969 II. (Coleoptera, Scarabaeoidea, Melolonthidae)
Authors: Keith Denis
Published: February 2017

Synonymie entre Pseudopanotrogus kashmirensis Petrovitz, 1969 et P. nepalensis (Frey, 1969) et Brahmina clypealis Moser, 1915. Description de quatre nouvelles espèces de Panotrogus Reitter, 1902 d'Afghanistan et du Pakistan. Présence en Afghanistan de Panotrogus heinzi Keith, 2001. Clé de détermination des mâles du genre Panotrogus.
Urnatella gracilis Leidy, 1851, un Entoprocte d'eau douce nouveau pour la faune française
Authors: d'Hondt Jean-Loup , Morgillo Anne , Gontier Bruno
Published: February 2017

L'Entoprocte d'eau douce Urnatella gracilis Leidy, 1851, récemment signalé de plusieurs pays d'Europe d'où il était encore inconnu, a été pour la première fois récolté en France, en 2001, dans le département de l'Aude. Ses caractères principaux et sa distribution géographique sont brièvement rappelés ici.
Photoionization of Ne Atoms and Ne+ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections
Authors: Müller Alfred , Bernhardt Dietrich , Borovik Alexander , Buhr Ticia , Hellhund Jonas , Holste Kristof , Kilcoyne A. L. David , Klumpp Stephan , Martins Michael , Ricz Sandor , Seltmann Jörn , Viefhaus Jens , Schippers Stefan
Published: February 2017

Single, double, and triple photoionization of Ne+ ions by single photons have been investigated at the synchrotron radiation source PETRA III in Hamburg, Germany. Absolute cross-sections were measured by employing the photon–ion merged-beams technique. Photon energies were between about 840 and 930 eV, covering the range from the lowest-energy resonances associated with the excitation of one single K-shell electron up to double excitations involving one K- and one L-shell electron, well beyond the K-shell ionization threshold. Also, photoionization of neutral Ne was investigated just below the K edge. The chosen photon energy bandwidths were between 32 and 500 meV, facilitating the determination of natural line widths. The uncertainty of the energy scale is estimated to be 0.2 eV. For comparison with existing theoretical calculations, astrophysically relevant photoabsorption cross-sections were inferred by summing the measured partial ionization channels. Discussion of the observed resonances in the different final ionization channels reveals the presence of complex Auger-decay mechanisms. The ejection of three electrons from the lowest K-shell-excited Ne+(

) level, for example, requires cooperative interaction of at least four electrons.
Extragalactic Peaked-spectrum Radio Sources at Low Frequencies
Authors: Callingham J. R. , Ekers R. D. , Gaensler B. M. , Line J. L. B. , Hurley-Walker N. , Sadler E. M. , Tingay S. J. , Hancock P. J. , Bell M. E. , Dwarakanath K. S. , For B.-Q. , Franzen T. M. O. , Hindson L. , Johnston-Hollitt M. , Kapińska A. D. , Lenc E. , McKinley B. , Morgan J. , Offringa A. R. , Procopio P. , Staveley-Smith L. , Wayth R. B. , Wu C. , Zheng Q.
Published: February 2017

We present a sample of 1483 sources that display spectral peaks between 72 MHz and 1.4 GHz, selected from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. The GLEAM survey is the widest fractional bandwidth all-sky survey to date, ideal for identifying peaked-spectrum sources at low radio frequencies. Our peaked-spectrum sources are the low-frequency analogs of gigahertz-peaked spectrum (GPS) and compact-steep spectrum (CSS) sources, which have been hypothesized to be the precursors to massive radio galaxies. Our sample more than doubles the number of known peaked-spectrum candidates, and 95% of our sample have a newly characterized spectral peak. We highlight that some GPS sources peaking above 5 GHz have had multiple epochs of nuclear activity, and we demonstrate the possibility of identifying high-redshift (z > 2) galaxies via steep optically thin spectral indices and low observed peak frequencies. The distribution of the optically thick spectral indices of our sample is consistent with past GPS/CSS samples but with a large dispersion, suggesting that the spectral peak is a product of an inhomogeneous environment that is individualistic. We find no dependence of observed peak frequency with redshift, consistent with the peaked-spectrum sample comprising both local CSS sources and high-redshift GPS sources. The 5 GHz luminosity distribution lacks the brightest GPS and CSS sources of previous samples, implying that a convolution of source evolution and redshift influences the type of peaked-spectrum sources identified below 1 GHz. Finally, we discuss sources with optically thick spectral indices that exceed the synchrotron self-absorption limit.
Absolute Dimensions of the Eccentric Eclipsing Binary V541 Cygni
Authors: Torres Guillermo , McGruder Chima D. , Siverd Robert J. , Rodriguez Joseph E. , Pepper Joshua , Stevens Daniel J. , Stassun Keivan G. , Lund Michael B. , James David
Published: February 2017

We report new spectroscopic and photometric observations of the main-sequence, detached, eccentric, double-lined eclipsing binary V541 Cyg (P = 15.34 days, e = 0.468). Using these observations together with existing measurements, we determine the component masses and radii to better than 1% precision:

,

,

, and

. The nearly identical B9.5 stars have estimated effective temperatures of 10650 ± 200 K and 10350 ± 200 K. A comparison of these properties with current stellar evolution models shows excellent agreement at an age of about 190 Myr and [Fe/H] ≈ −0.18. Both components are found to be rotating at the pseudo-synchronous rate. The system displays a slow periastron advance that is dominated by general relativity (GR), and has previously been claimed to be slower than predicted by theory. Our new measurement,

deg century−1, has an 88% contribution from GR and agrees with the expected rate within the uncertainties. We also clarify the use of the gravity darkening coefficients in the light-curve fitting Eclipsing Binary Orbit Program (EBOP), a version of which we use here.
Was 49b: An Overmassive AGN in a Merging Dwarf Galaxy?
Authors: Secrest Nathan J. , Schmitt Henrique R. , Blecha Laura , Rothberg Barry , Fischer Jacqueline
Published: February 2017

We present a combined morphological and X-ray analysis of Was 49, an isolated, dual-AGN system notable for the presence of a dominant AGN, Was 49b, in the disk of the primary galaxy, Was 49a, at a projected radial distance of 8 kpc from the nucleus. Using X-ray data from Chandra, the Nuclear Spectroscopic Telescope Array, and Swift, we find that this AGN has a bolometric luminosity of L
bol ∼ 1045 erg s−1, with a black hole mass of

. Despite the large mass, our analysis of optical data from the Discovery Channel Telescope shows that the supermassive black hole (SMBH) is hosted by a stellar counterpart with a mass of only

, which makes the SMBH potentially larger than expected from SMBH–galaxy scaling relations, and the stellar counterpart exhibits a morphology that is consistent with dwarf elliptical galaxies. Our analysis of the system in the r and K bands indicates that Was 49 is a minor merger, with the mass ratio of Was 49b to Was 49a between ∼1:7 and ∼1:15. This is in contrast with findings that the most luminous merger-triggered AGNs are found in major mergers and that minor mergers predominantly enhance AGN activity in the primary galaxy.
Perspective on the Cosmic-ray Electron Spectrum above TeV
Authors: Fang Kun , Wang Bing-Bing , Bi Xiao-Jun , Lin Su-Jie , Yin Peng-Fei
Published: February 2017

The AMS-02 has measured the cosmic-ray electron (plus positron) spectrum up to ∼TeV with unprecedented precision. The spectrum can be well described by a power law without any obvious features above 10 GeV. The satellite instrument Dark Matter Particle Explorer (DAMPE), which was launched a year ago, will measure the electron spectrum up to 10 TeV with high-energy resolution. The cosmic electrons beyond TeV may be attributed to few local cosmic-ray sources, such as supernova remnants. Therefore, spectral features, such as cut-off and bumps, can be expected at high energies. In this work, we provide a careful study on the perspective of the electron spectrum beyond TeV. We first examine our astrophysical source models on the latest leptonic data of AMS-02 to give a self-consistent picture. Then we focus on the discussion about the candidate sources, which could be electron contributors above TeV. Depending on the properties of the local sources (especially on the nature of Vela), DAMPE may detect interesting features in the electron spectrum above TeV in the future.
Modeling the Anomalous Microwave Emission with Spinning Nanoparticles: No PAHs Required
Authors: Hensley Brandon S. , Draine B. T.
Published: February 2017

In light of recent observational results indicating an apparent lack of correlation between the anomalous microwave emission (AME) and mid-infrared emission from polycyclic aromatic hydrocarbons, we assess whether rotational emission from spinning silicate and/or iron nanoparticles could account for the observed AME without violating observational constraints on interstellar abundances, ultraviolet extinction, and infrared emission. By modifying the SpDust code to compute the rotational emission from these grains, we find that nanosilicate grains could account for the entirety of the observed AME, whereas iron grains could be responsible for only a fraction, even for extreme assumptions on the amount of interstellar iron concentrated in ultrasmall iron nanoparticles. Given the added complexity of contributions from multiple grain populations to the total spinning dust emission, as well as existing uncertainties due to the poorly constrained grain size, charge, and dipole moment distributions, we discuss generic, carrier-independent predictions of spinning dust theory and observational tests that could help identify the AME carrier(s).
Orthogonal Vertical Velocity Dispersion Distributions Produced by Bars
Authors: Du Min , Shen Juntai , Debattista Victor P. , Lorenzo-Cáceres Adriana de
Published: February 2017

In barred galaxies, the contours of stellar velocity dispersions (σ) are generally expected to be oval and aligned with the orientation of bars. However, many double-barred (S2B) galaxies exhibit distinct σ peaks on the minor axis of the inner bar, which we termed “σ-humps,” while two local σ minima are present close to the ends of inner bars, i.e., “σ-hollows.” Analysis of numerical simulations shows that

-humps or hollows should play an important role in generating the observed σ-humps+hollows in low-inclination galaxies. In order to systematically investigate the properties of

in barred galaxies, we apply the vertical Jeans equation to a group of well-designed three-dimensional bar+disk(+bulge) models. A vertically thin bar can lower

along the bar and enhance it perpendicular to the bar, thus generating

-humps+hollows. Such a result suggests that

-humps+hollows can be generated by the purely dynamical response of stars in the presence of a sufficiently massive, vertically thin bar, even without an outer bar. Using self-consistent N-body simulations, we verify the existence of vertically thin bars in the nuclear-barred and S2B models that generate prominent σ-humps+hollows. Thus, the ubiquitous presence of σ-humps+hollows in S2Bs implies that inner bars are vertically thin. The addition of a bulge makes the

-humps more ambiguous and thus tends to somewhat hide the

-humps+hollows. We show that

may be used as a kinematic diagnostic of stellar components that have different thicknesses, providing a direct perspective on the morphology and thickness of nearly face-on bars and bulges with integral field unit spectroscopy.
Exploring the Evolution of Star Formation and Dwarf Galaxy Properties with JWST/MIRI Serendipitous Spectroscopic Surveys
Authors: Bonato Matteo , Sajina Anna , Zotti Gianfranco De , McKinney Jed , Baronchelli Ivano , Negrello Mattia , Marchesini Danilo , Roebuck Eric , Shipley Heath , Kurinsky Noah , Pope Alexandra , Noriega-Crespo Alberto , Yan Lin , Kirkpatrick Allison
Published: February 2017

The James Webb Space Telescope’s Medium Resolution Spectrometer (MRS), will offer nearly two orders of magnitude improvement in sensitivity and >3×  improvement in spectral resolution over our previous space-based mid-IR spectrometer, the Spitzer IRS. In this paper, we make predictions for spectroscopic pointed observations and serendipitous detections with the MRS. Specifically, pointed observations of Herschel sources require only a few minutes on source integration for detections of several star-forming and active galactic nucleus lines, out to z = 3 and beyond. But the same data will also include tens of serendipitous 0 ≲ z ≲ 4 galaxies per field with infrared luminosities ranging ∼106–1013
L
☉. In particular, for the first time and for free we will be able to explore the L
IR < 109
L
☉ regime out to z ∼ 3. We estimate that with ∼ 100 such fields, statistics of these detections will be sufficient to constrain the evolution of the low-L end of the infrared luminosity function, and hence the star formation rate function. The above conclusions hold for a wide range in the potential low-L end of the IR luminosity function, and account for the PAH deficit in low-L, low-metallicity galaxies.
Proper Motions and Structural Parameters of the Galactic Globular Cluster M71*
Authors: Cadelano M. , Dalessandro E. , Ferraro F. R. , Miocchi P. , Lanzoni B. , Pallanca C. , Massari D.
Published: February 2017

By exploiting two ACS/HST data sets separated by a temporal baseline of ∼7 years, we have determined the relative stellar proper motions (PMs; providing membership) and the absolute PM of the Galactic globular cluster M71. The absolute PM has been used to reconstruct the cluster orbit within a Galactic, three-component, axisymmetric potential. M71 turns out to be in a low-latitude disk-like orbit inside the Galactic disk, further supporting the scenario in which it lost a significant fraction of its initial mass. Since large differential reddening is known to affect this system, we took advantage of near-infrared, ground-based observations to re-determine the cluster center and density profile from direct star counts. The new structural parameters turn out to be significantly different from the ones quoted in the literature. In particular, M71 has a core and a half-mass radii almost 50% larger than previously thought. Finally, we estimate that the initial mass of M71 was likely one order of magnitude larger than its current value, thus helping to solve the discrepancy with the observed number of X-ray sources.
Les Prévost, peintres de fleurs : des jardins de La Celle-Saint-Cloud à l’expédition La Pérouse en passant par Trianon
Authors: Lamy Gabriela
Published: February 2017

L’apprentissage du dessin de plantes à la manufacture royale de Sèvres de 1754 à 1762 a permis à trois Prévost – Jean-Jacques, Guillaume et Jean-Louis –, fils d’un vigneron de Nointel (Val-d’Oise), de se distinguer en participant ensemble ou individuellement à d’importantes entreprises de la fin du xviiie siècle concernant l’art des jardins : illustration de la collection de plantes du jardin du château de La Celle-Saint-Cloud (recueil de plantes conservé à la Bibliothèque nationale de France) et de Trianon (dessins non retrouvés à ce jour), participation scientifique à l’expédition Lapérouse et carrière de peintre de fleurs reconnue. L’étude des parcours familiaux et professionnels des différents membres de cette fratrie permettra de découvrir un corpus de réalisations iconographiques qu’il serait intéressant d’analyser par la suite. La diversité de ces productions réalisées en fonction des demandes des commanditaires (propriétaires de jardins, manufactures de porcelaine, brodeurs et peintres de fleurs en quête de nouveaux modèles) témoigne de l’existence de nouvelles plantes acclimatées dans les jardins des collectionneurs ou dessinées au cours d’expéditions scientifiques.
Image Analysis Software for Porosity Measurements in Some Powder Metallurgy Alloys
Authors: Marin Mihaela , Potecaşu Florentina , Potecaşu Octavian , Marin Florin Bogdan
Published: February 2017

The present research was aimed to study the porosity in some powder metallurgy (P/M) alloys using an image analysis software. The porosity in P/M parts is an important parameter because is affecting the mechanical properties. Also, porosity is in correlation with processing parameters such as green density, alloying elements, particle size. The conventional method for porosity measurements of powder metallurgy products is using the density technique. Another method for porosity measurements was using an image processing software and by applying filters and adjustments the detection of the pores (black areas) was done. Two types of powders obtained by water amotization were subjected to analyze. To obtain the green compacts, the powders were pressed at 600 MPa using a single die action. The green compacts were sintered in a laboratory furnace at 1150o C for 30 and 120 minutes. A metallographic analysis was performed for porosity measurements. The pore’s shape and porosity fraction were measured using both conventional and image analysis techniques. The porosity measurements for sitnered specimens obtained from image analysis was slightly higher than that from density technique.
Fatigue Life Estimation of a Layered Composite Plate
Authors: Iacob Ionel , Chirica Ionel , Beznea Elena Felicia
Published: February 2017

This paper presents the FEM approach of fatigue life estimation of a layered composite plate having a central elliptical cut-out subjected to time variation loads. Some properties and material data, such as data used for the S-N curve / Wöhler curve of the material, represented in cyclic stress versus number of cycles to failure coordinates, which is required for starting the fatigue analysis, were taken from the OPTIMAT database.The plate analysis was parameterized and modeled with the Shell281 element type. This type of element can be used in a triangular form more efficiently than other types of shell elements available in version 15 of ASYS APDL.Initially, the static analysis was performed to identify the node with the maximum principal stress (hot spots). This node was used for performing the fatigue analysis. The fatigue parameter to estimate fatigue life is cumulative fatigue usage factor. This factor is obtained by adding together all individual usage factors calculated for each variable load that is applied to the analyzed plate. The fatigue usage factor is used to estimate the percentage of life that is consumed after applying the fatigue loads. The value of the usage factor is in the range from 0 to 1.
Influence of the Honeycomb Geometry on the Sandwich Composite Plate Behavior
Authors: Rotaru Florentina , Chirica Ionel , Beznea Elena Felicia
Published: February 2017

In this paper the influence cell honeycomb geometry on the mechanical behaviour of a composite sandwich plate is analyzed. Three cell geometries (circular, hexagonal and square) are static analysed so that to select the best type of honeycomb that will be used in the manufacturing the sandwich plate core. The main aim is to develop approach models of equivalent orthotropic materials to replace the real model of honeycomb core with their properties so that to quickly calculate the sandwich plate made out of composite when is used a finite element analysis code. Geometry and material properties of the honeycomb are delivered by the material provider. Comparative analysis, by using Finite element analysis is performed for all geometries, in the same boundary conditions. Since in the impact loading of the composite sandwich plate the core is mainly loaded to compression, comparative study of the three cell geometries honeycomb was performed for this type of compressive loading. Since the cell is the basic element of the honeycomb core, the calculus is performed for one unit volume of sandwich, concerning also the part of skins.
Experimental Study on the Stability Level Assessment of Mini-Implants for Orthodontic Anchorages
Authors: Nicolau Alexandru Mircea , Vasilescu Elisabeta , Vasilescu Vlad Gabriel , Neacsu Marian Iulian
Published: February 2017

This paper presents some results of the experimental investigations that were aimed at assessing the primary stability of orthodontic mini-implant anchorage by measuring the tensile force with a special device adapted for traction in the axial direction and at a 45 degree angle, taking as variables bone characteristics (thickness and cortical bone density, thickness and density of the medulla). We used samples (pork ribs) whose characteristics were measured at computer tomography with a specialized software, in which there have been inserted orthodontic mini-implants with spherical head, round thread having different characteristics of shape and dimensions of the thread (length diameter, pitch). Experiments have provided information on the relationship between bone characteristics of samples and maximum traction force in the axial direction and at 45degree angle, as well as mini-implant primary stability.
Mathematical Modeling and Optimization of Fluidized Layer Carbonitriding Process for 1C 25 Steel
Authors: Neacsu Marian Iulian , Dobrovici Sorin
Published: February 2017

This paper presents the experiment-based mathematical modelling of fluidized bed carbonitriding process for 1C 25 steel meant to optimize this type of thermochemical processing.Based on experimental results, the mathematical model was developed, which is a second order equation with three unknown terms (parameters): temperature, depth of carbonitrided layer, the percentage of ammonia.The mathematical model allowed the simulation of the fluidized layer carbonitriding process according to its parameters and the thermal energy optimization for obtaining HV hardness values in the range 300-400 MPa.Using the software package Matlab a graphical interface was done, through which all the combinations of technological parameters of the carbonitriding process are determined, leading to obtaining values of microhardness between 300 and 400 MPa, as well as the amount of energy consumed for each variant. The variant consuming the lowest energy is considered optimal.
Obtaining of the Ni-P Coatings on Steel Strips
Authors: Radu Tamara
Published: February 2017

The Ni-P coatings on steel strips were obtained by electroless method. Experiments were performed at three pHs, respectively: 6.6; 5.11 and 4.32 with immersion times 5 and 12 minutes at 80 - 85°C. Deposits were caractherized by energy-dispersive analysis (EDS), scanning electron microscopy (SEM) and optical microscopy. The chemical composition shows an increased of phosphorus content at the pH descrease, so at the pH-6.6 the phosphorus content in the coating is 4.74 wt% and at pH-4.32 is 12.42 wt% P. Regardless of the pH value is observed was some chemical dishomogeneity of layers the more pronounced with as the pH value is higher. Alongside Ni and P the layers can contain small amounts of oxygen and other elements coming from the nickel bath impurities and from working environment. Also it shows the surface morphology in correlation with the deposition process parameters and surface defects possible.
Fe-Doped ZnO Nanoparticles: Structural, Morphological, Antimicrobial and Photocatalytic Characterization
Authors: Mușat Viorica , Ibănescu Mariana , Tutunaru Dana , Potecaşu Florentina
Published: February 2017

Oxide semiconductors have attracted increasing interest due to their potential in solving environmental problems. ZnO-based nanoparticles (NPs) are among the most investigated for efficient disinfection and microbial control.Iron-doped zinc oxide nanoparticles (Fe:ZnO NPs) were successfully fabricated through precipitation method at low temperature followed by thermal treatment. The obtained Fe:ZnO NPs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible (UV–Vis) spectroscopy. The effect of iron content on structural, morphological, antimicrobial and photocatalytic properties was investigated and discussed.The photocatalytic activity of the nanoparticles was tested by degradation of methylene blue (MB) solution under UV light for 60 min irradiation. The antibacterial activity was determined by paper disc method on Mueller-Hinton agar against the Gram-negative bacteria Escherichia coli (E. coli) and the Gram-positive bacteria Staphylococcus aureus (S. aureus) and compared to that of the undoped ZnO NPs. Consistent improvement on the photocatalytic and antimicrobial activity of Fe-doped ZnO nanoparticles was noticed.
Characterization of Ni-P and Ni-P-Al2O3 Heat Treated Layers
Authors: Balint Lucica , Istrate Gina Genoveva
Published: February 2017

Research has shown the relationship among hardness, usage and corrosion resistance Ni-P-Al2O3 composite coatings on steel support heat treated. The electroless strips were heat treated at 200°C, 300°C, 400°C, 500°C and 600°C. Further studies on corrosion, hardness and usage revealed changes in properties, compared to the initial state, both on the strips coated with Ni-P and the ones coated with Ni-P-Al2O3 composite. The samples have been studied before and after the heat treatment via Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Analysis (EDX) and X-Ray Diffraction (XRD). The results show that untreated Ni-P layers exhibit strong corrosion resistance, while hardness and usage increase with heat treatment temperature, with a peak at 400 °C. Using suspended particles co-deposition, led to new types of layers, some with excellent hardness and usage properties. Corrosion resistance increase with heat treatment. Coating layers can be adjusted to the desired characteristics, by selecting proper parameters for the expected specific results.
Study on Ni-Cr-Mo Dental Alloy Subjected to Electrocorrosion in Artificial Saliva
Authors: Baciu Maria , Baciu Elena Raluca , Cimpoeşu Ramona , Gradinaru Irina
Published: February 2017

The investigations conducted aimed at determining the microstructural and chemical modifications produced in a Ni-Cr-Mo alloy following electrocorrosion in Afnor artificial saliva by using SEM electronic microscopy and EDS chemical analysis. By 2D and 3D microscopy and by qualitative determinations of the luminous variation we could notice the effects of electrocorrosion tests on the surface of the metallic material, and by EDAX qualitative and quantitative determinations (Point, Line and Mapping modes) of the surface chemical composition we could determine the chemical modifications produced following the corrosion tests.
A comparative pharmacognostic evaluation of anatomical and chemical characters of Nardostachys jatamansi (D.Don) DC. (Jatamansa) and Valeriana mooni Arn. ex C.B.Clarke (Lanka thuwarala)
Authors: Jayaratne R.K. , Hettiarachchi P.L. , Abeysekara A.
Published: February 2017

Nardostachys jatamansi (Caprifoliaceae), known as Jatamansa, is an important plant in Ayurveda and traditional medicine in Sri Lanka. The dried rhizome of the plant is an important ingredient in many drugs. This plant does not grow in Sri Lanka. The practice has been to import it from India However, currently its export has been banned as it has become an endangered species in India . An island wide market survey carried out by authors revealed, that the material sold as Jatamansa is substituted by materials other than its recommended substitute, Valeriana wallichii to an extent ranging from 66% to 100%. Substitution with materials other than recommended substitute might adversely affect the efficacy and safety of the drugs manufactured. As V. wallichii also does not grow naturally in Sri Lanka, the present study was carried out to compare pharmacognostic properties of V. mooni the only species of Valeriana found in Sri Lanka with N. jatamansi to evaluate the possibility of replacing N. jatamansi with V. mooni and to establish comparative quality standards of the two plant species which will enable to identify raw material at the point of purchasing.Preliminary phytochemical screening indicated the presence of alkaloids, flavonoids and hydrolysable tannins in both species. The TLC analysis of the ethanol extract of the rhizomes, and GCMS analysis of their essential oils indicated that both species possess similar chemical compounds. The pharmacologically important principal sesquiterpene Jatamansone, was found even in higher amount in V. mooni (25.6%) than in N. jatamansi (8.9%). However clinical trials are needed to decide on the possibility of substituting Indian N. jatamansi with local V. mooni. The findings of the present study have added a new member to the potential list of medicinal plants and identified as an important endangered plant with the need for conservation, hence develop suitable propagation systems and cultivation.
Identification of endemic Curcuma albiflora Thw. by DNA barcoding method
Authors: Wijayasiriwardene T.D.C.M.K. , Herath H.M.I.C. , Premakumara G.A.S.
Published: February 2017

Harankaha is important medicinal plant, which is used in Sri Lankan traditional medicine. However, three plants are reported under the same vernacular name (e.g. Curcuma albiflora, Curcuma zedoaria, and Zingiber zerumbet) and therefore the raw material may be adulterated or substituted with each other. Phylogenetic analysis of gene sequences and combining with complete genomic sequences helps to identify genetic basis of plants. Standard CTAB method with little modifications was used for the extraction and purification. Extracted DNA was amplified using universal primers for matK genes in chloroplast genome rbcL gene in chloroplast genome by PCR (polymerase chain reaction). The rbcL primers amplified about 600 bp, while matK was about 850 bp. Amplified fragments were sequenced and obtained the DNA sequences for the matK and rbcL genes. Sequenced fragments were analyzed and used for DNA barcoding. DNA barcode was submitted to BOLD (Barcoding of Life Database) online database and then uploaded to the GenBank through the BOLD system (Accession No KF 521885). The distance of interspecific were 0.0010 in rbcL and 0.05 in matK, which is less than or equal to 0.05 matK sequences were selected for identification of C. albiflora, C. zedoaria and Z. zerumbet. C. albiflora appeared as a different group as per the Neighbor-Joining method and therefore, it can be identified as a new group. The matK gene of C. albiflora and other species showed, totally 212 variable sites. However, rbcL gene of C. albiflora and other species showed only 2 variable sites. Therefore, matK gene is suggested to identify C. albiflora from other two species claimed as Harankaha plants.
Specification for O-Ring Face Seal Connectors: Part 1 - Tube Connection Details and Common Requirements for Performance and Tests
Authors:   Hydraulic Tube Fittings Committee
Published: February 2017

The three parts of SAE J1453 cover material, dimensional, and performance requirements of steel O-ring face seal (ORFS) connectors for tubing and the O-ring face seal interface and nut portion of hose stem assemblies for nominal tube diameters of 6 mm through 50 mm.
Physical Layer, 250 Kbps, Twisted Shielded Pair
Authors:   Truck Bus Control and Communications Network Committee
Published: February 2017

This document defines a physical layer having a robust immunity to EMI and physical properties suitable for harsh environments.

These SAE Recommended Practices are intended for light- and heavy-duty vehicles on- or off-road as well as appropriate stationary applications which use vehicle derived components (e.g., generator sets). Vehicles of interest include but are not limited to: on- and off-highway trucks and their trailers; construction equipment; and agricultural equipment and implements.
On-Highway Equipment Control and Communication Network
Authors:   Truck Bus Control and Communications Network Committee
Published: February 2017

SAE J1939-1 On-Highway Equipment Control and Communication Network specifies the minimum set of SAE J1939 documents that define the Truck and Bus Control and Communications Vehicle Network as it applies to on-highway equipment. Vehicles covered include all on-highway straight trucks and road trains. A road train consists of one towing vehicle (tractor) and one or more towed vehicles (trailers and dollies). Dolly axles within the road train are considered to be towed vehicles.
OBD Communications Compliance Test Cases for Heavy Duty Components and Vehicles
Authors:   Truck Bus Control and Communications Network Committee
Published: February 2017

The purpose of this Recommended Practice is to verify that vehicles and/or components are capable of communicating a required set of information, in accordance with the diagnostic test messages specified in SAE J1939-73, to fulfill the off-board diagnostic tool interface requirements contained in the government regulations cited below.

This document describes the tests, test methods, and results for verifying diagnostics communication from an off board diagnostic tool (i.e. scan tool) to a vehicle and/or component. SAE members have generated this document to serve as a guide for testing vehicles for compliance with ARB and other requirements for emissions-related on-board diagnostic (OBD) functions for heavy duty engines used in medium and heavy duty vehicles.

The development of HD OBD regulations by US EPA and California’s Air Resources Board (ARB) require that diagnostic message services are exercised to evaluate diagnostic communication standardization requirements on production vehicles. The December 2008 publication of J1939-84 described a test process for EURO IV and EURO V engine emissions and diagnostics regulations. The December 2010 version of the document added a test plan and procedures for ARB and US EPA HD OBD requirements with emphasis on 13 CCR 1971.1 (l)(1) Verification of Standardized Requirements. The user should reference the summary provided by SAE J1939-73 Table 1 and Table 2 for OBD compliance support.
Recommended Practices (RP) for Shipping Transport and Handling of Automotive-Type Battery System - Lithium Ion
Authors:   Battery Transportation Committee
Published: February 2017

This RP aids in the identification, handling, and shipping of new and used un-installed lithium ion battery systems to and from specified locations. The generic term “battery system” shall be used to identify automotive-type and sized “traction” batteries when used as intended by the vehicle and battery system original equipment manufacturers (OEMs) for ground vehicles. It is the specific intent of this RP to identify, utilize and reference existing US and International hazardous materials (dangerous goods) transportation regulations, which are the only methodologies to be used to establish transportability of new battery systems. It is also the intent of this RP to provide recommendations regarding diagnostic testing to be used by service and shipping personnel for the purpose of determining a used battery system’s transportability. In support of the service and shipping personnel, the diagnostics process seeks to use standard tools of the trade and avoid laboratory type equipment.
Performance Levels and Methods of Measurement of Magnetic and Electric Field Strength from Electric Vehicles, 150 kHz to 30 MHz
Authors:   Electromagnetic Compatibility (EMC) Standards
Published: February 2017

This SAE Recommended Practice specifies measurement procedures and performance levels for magnetic and electric field emissions and conducted power mains emissions over the frequency range 150 kHz to 30 MHz, for vehicles incorporating electric propulsion systems, e.g., battery, hybrid, or plug-in hybrid electric vehicles.

Conducted emission measurements in this document are applicable only to battery-charging systems which utilize a switching frequency above 9 kHz, are mounted on the vehicle, and whose power is transferred by metallic conductors. Conducted emission requirements apply only during charging of the batteries from AC power lines.

Conducted and radiated emissions measurements of battery-charging systems that use an induction power coupling device are not covered by this document.

The measurement of electromagnetic disturbances for frequencies from 30 MHz to 1000 MHz is covered in CISPR 12.
Maja Bitenc: Z jezikom na poti med Idrijskim in Ljubljano
Authors: Gorjanc Vojko
Published: February 2017

Maja Bitenc: Z jezikom na poti med Idrijskim in Ljubljano
Tagging Named Entities in Croatian Tweets
Authors: Baksa Krešimir , Golović Dino , Glavaš Goran , Šnajder Jan
Published: February 2017

Named entity extraction tools designed for recognizing named entities in texts written in standard language (e.g., news stories or legal texts) have been shown to be inadequate for user-generated textual content (e.g., tweets, forum posts). In this work, we propose a supervised approach to named entity recognition and classification for Croatian tweets. We compare two sequence labelling models: a hidden Markov model (HMM) and conditional random fields (CRF). Our experiments reveal that CRF is the best model for the task, achieving a very good performance of over 87% micro-averaged F1 score. We analyse the contributions of different feature groups and influence of the training set size on the performance of the CRF model.