bluuebunny/crossref_metadata_2025 huggingface dataset:
Diplomates, archéologues et joggeurs aux Salines de Kition. La localisation du sanctuaire « de la Paralia »
Authors: Maillard Pauline
Published: March 2019

The «Sanctuary of Artemis Paralia » in Kition (present Larnaca, Cyprus) is primarily renowned for the spot where hundreds of terracottas of the «Greek Classical » type were discovered in the late 19th century. Today preserved in prestigious collections around the world, those figurines – mainly representing a seated goddess wearing vegetal attributes, sometimes coupled with young children – have never been part of an extended research including all archaeological material which is constituting the starting point of my ongoing PhD thesis. The exact location of the original deposits cleared out between 1864 and 1870 is subject to different assumptions. With the support of original archives and personal field observations, this paper suggests however, that the place determined by the most frequently followed topographical study edited by Kyriakos Nicolaou in 1976 is partially mistaken.
Au sujet de deux attestations de l’Aphrodite Kypris en Crète orientale à la basse époque hellénistique
Authors: Thély Ludovic
Published: March 2019

This article deals with two inscriptions, known from more than a century, discovered in Crete, but which have never been translated or even briefly commented. These documents reveal the existence of Aphrodite Kypris in the pantheon of gods in two important Cretan cities in Hellenistic times. We propose therefore to examine an aspect of cultural relationships between Crete, Cyprus and Alexandria through these inscriptions.
Les élites de Narbonne et les ordres supérieurs de l’Empire (Ier siècle av. J.-C. - IIe siècle ap. J.-C.)
Authors: Bonsangue Maria-Luisa
Published: March 2019

Reconsidering epigraphical data about senators and knights native of Narbonne leads to qualify the idea of a low capital city involvement in the imperial elites recruitment during the early Roman empire. It is particularly striking for the equestrian community from Narbonne who was greater than we used to think. It rose partially for its members’ military merit and partially thanks to their estates constituted by various economic activities. By contrast the impression remains of a low participation in senatorial recruitment, a more refined analysis of evidences allows to better understand the real reasons for the rise of narbonensian families. Their trajectories reflect the distinctive features of Narbonne : a city with strong military traditions, with a very dynamic business community and linked with the Roman intellectual life. Thus the early empire narbonensian elite can illustrate «the triumph of wealth, energy and opportunism » of provincials so dear to Ronald Syme.
La domus au Salon noir. Nouvelles données sur l’habitat résidentiel d’Aix-en-Provence aux Ier et IIe s. ap. J.-C. 1. Insertion urbaine, organisation et chronologie
Authors: Nin Nuria , Huguet Céline , Panneau Marc
Published: March 2019

Plusieurs interventions archéologiques, menées de 1998 à 2008, ont permis d’explorer un quartier situé au sud-ouest de la ville romaine d’Aix-en-Provence, où deux domus, installées entre le rempart et le decumanus maximus, ont été mises au jour. L’ensemble de ces recherches autorise des propositions de restitution, à la fois du processus de lotissement d’un quartier situé en périphérie immédiate de l’enceinte de la ville, mais également de l’emprise d’une domus résidentielle et des principales étapes de son évolution. Un intérêt particulier tient enfin à la découverte, dans un contexte de la fin du IIe siècle, d’un ensemble mobilier très bien conservé qui, en livrant une image instantanée de la vie domestique, est riche d’enseignements sur l’évolution de ce quartier résidentiel.
L’artisanat potier et tuilier dans la vallée du Vidourle durant l’Antiquité (Ier s. av. J.-C. – VIe s. ap. J.-C.) : apports documentaires de fouilles et prospections récentes
Authors: Scrinzi Maxime , Houix Bertrand , Monteil Martial , Pascal Yoann , Pomarèdes Hervé , Rascalou Pierre , Raux André , Favennec Benoît
Published: March 2019

Des Cévennes à la Méditerranée, en passant par les collines calcaires et la lagune littorale, le Vidourle traverse le géo-système bas-languedocien. Son bassin-versant de 800 km ² , a bénéficié de différentes opérations de prospections pédestres, de fouilles programmées et préventives qui nourrissent un riche corpus de plusieurs centaines d’établissements. Si l’occupation du sol de cette vallée située au coeur de la cité de Nîmes reste bien perçue, la question de l’artisanat potier et tuilier dans l’Antiquité constitue un domaine d’étude à peine effleuré, certainement en raison de la relative faiblesse des données, par rapport aux vallées de l’Aude, de l’Hérault ou du Rhône. Toutefois, ces dix dernières années ont vu la découverte de quatre fours, qui, associés aux données de prospections, permettent d’esquisser une première synthèse sur la production de céramiques et de terres cuites architecturales dans la vallée.
Inscriptions de la province des Alpes Maritimes dans la correspondance de Jean-François Séguier
Authors: Christol Michel
Published: March 2019

L’unique lettre conservée de la correspondance entre Jean-Philippe Campion, abbé de Tersan, et Jean-François Séguier comporte la copie d’inscriptions de la province des Alpes maritimes. L’une d’elle, à Vence, revient par la suite grâce à la correspondance avec l’historien provençal Papon (CIL, XII, 12). Mais une autre (CIL, XII, 88), habituellement située à Rigomagus (Fauconde-Barcelonette), doit être attribuée à une localité plus septentrionale de cette cité provinciale, Meyronnes, dans la vallée de l’Ubayette. La copie en cursive permet aussi d’en proposer une nouvelle lecture.
Tuning the stability of alkoxyisopropyl protection groups
Authors: Liang Zehong , Koivikko Henna , Oivanen Mikko , Heinonen Petri
Published: March 2019

Five different 2-alkoxypropan-2-yl groups are introduced as acid-labile protecting groups for the 5’- and 3’-hydroxy groups of a 2’-deoxynucleoside. All studied protecting groups were readily introduced with good to excellent yields using the appropriate enol ether as a reagent and 0.5 to 1 mol % p-toluenesulfonic acid as a catalyst. The protected compounds could be purified by silica gel column chromatography without degradation. The compatibility of these protecting groups in parallel use with benzoyl and silyl groups was verified. The stabilities of the different alkoxy acetal protecting groups were compared by following the kinetics of their hydrolysis at 25.0 °C in buffered solutions through an HPLC method. In the pH range 4.94 to 6.82 the hydrolysis reactions are of first order in the hydronium ion. The rate of hydrolysis correlates with the electron-donating or electron-withdrawing ability of the corresponding alkoxy group. The studied 2-alkoxypropan-2-yl groups and the relative rate constants for their cleavage from the 5’-hydroxy group of 2’-deoxythymidine were: cyclohexyloxy (krel = 7.7), isopropoxy (7.4), methoxy (1), benzyloxy (0.6) and 2,2,2-trifluoroethyloxy (0.04). The attachment of the same groups to the 3’-hydroxy group are from 1.3 to 1.9-fold more stable. The most reactive of these acetone-based acetal groups are faster removed than a dimethoxytrityl group, and they are easier to cleave completely in solution. The structural variation allows steering of the stability and lipophilicity of the compounds in some range.
COMPUTER SIMULATION FOR SUBCRITICAL CONVECTION IN MULTI‐COMPONENT ALLOYS
Authors: Kolmychkov V. V.
Published: March 2019

Subcritical convection with hexagonal flow pattern is registered in 3D computer simulation of convective mass transfer in ternary solution under phase transition conditions. The calculations are evaluated by the classical theory of hydrodynamic stability and display a good agreement with linear and finite amplitude stability analysis. Key words: convective instability, subcritical convection, computer simulation.
COMPUTING THE STABILITY BOUNDARIES FOR THE LAGRANGE TRIANGULAR SOLUTIONS IN THE ELLIPTIC RESTRICTED THREE‐BODY PROBLEM
Authors: Prokopenya A. N.
Published: March 2019

An algorithm is proposed for analytical computing the stability boundaries of the Lagrange triangular solutions in the elliptic restricted three‐body problem. It is based on the infinite determinant method. The algorithm has been implemented by using the computer algebra system Mathematica and the stability boundaries have been determined in the form of power series with respect to a small parameter with accuracy up to the 10th order.
MULTIPLE SOLUTIONS OF THE FOURTH‐ORDER EMDEN‐FOWLER EQUATION
Authors: Yermachenko I.
Published: March 2019

Two-point boundary value problems for the fourth-order Emden-Fowler equation are considered. If the given equation can be reduced to a quasi‐linear one with a non‐resonant linear part so that both equations are equivalent in some domain D, and if solution of the quasi‐linear problem is located in D, then the original problem has a solution. We show that a quasi‐linear problem has a solution of definite type which corresponds to the type of the linear part. If quasilinearization is possible for essentially different linear parts, then the original problem has multiple solutions.
EVALUATE PUBLIC-PRIVATE-PARTNERSHIP’S ADVANCEMENT USING DOUBLE HIERARCHY HESITANT FUZZY LINGUISTIC PROMETHEE WITH SUBJECTIVE AND OBJECTIVE INFORMATION FROM STAKEHOLDER PERSPECTIVE
Authors: Liu Nana , He Yue , Xu Zeshui
Published: March 2019

Public-Private-Partnership (PPP) as an efficient mode to provide public services through the government and social capital’s cooperation has been in China for more than 30 years. In this paper, we propose an approach to evaluate PPP’s advancement in different areas based on the subjective and objective information fusion. At first, we establish an index system from the perspective of the stakeholder. Then, considering that double hierarchy hesitant fuzzy linguistic term set (DHHFLTS) that has two hierarchies of linguistic term sets can describe the subjective linguistic information more accurately, it is applied in the paper to depict the subjective information. By applying the entropy of the DHHFLTS, a programming model is proposed to derive the attribute weight through combining subjective evaluation with objective data. In addition, we develop the double hierarchy hesitant fuzzy linguistic PROMETHEE combining the subjective and objective information (DHHFL-PROMETHEE-S&amp;amp;amp;amp;O) method. At last, we illustrate the index system and the method with the PPP’s advancement evaluation problem, and we can find the best choice based on the ranking result. Meanwhile, we also find that the objective information and the subjective information are complementary in the evaluation process.
CYCLING AT INTERSECTIONS: A MULTI-OBJECTIVE ASSESSMENT FOR TRAFFIC, EMISSIONS AND SAFETY
Authors: Bahmankhah Behnam , Fernandes Paulo , Coelho Margarida C.
Published: March 2019

This paper evaluated in an integrated manner the traffic performance, pollutant emissions and road conflicts between bicycles and motor vehicles at a signalized intersection. Two alternative scenarios were examined: (1) bicycles increment and motor vehicles replacement within the cycle-fixed traffic signal; (2) replacing the existing traffic control by a conventional two-lane roundabout and evaluating the impacts of bicycles increment. For each scenario, bicycle demand was varied from 9 to 270 bicycles per hour (bph). Traffic flow and vehicle dynamic data were collected from a three-leg signalized intersection in Aveiro (Portugal). The microscopic traffic model (VISSIM) paired with an emission (Vehicle Specific Power – VSP) methodology and safety (Surrogate Safety Assessment Methodology – SSAM) model were used to assess intersection-specific operations. The fast Non-Dominated Sorting Genetic Algorithm (NSGA-II) was used to find the optimal bicycle demands. The results showed that two-lane roundabout outperformed the existing traffic control, namely in highest bicycle demand scenario (number of stops and travel time reduced in 78 and 14%, respectively; CO2, NOx, and HC decreased 9, 7, and 12%, respectively). It was also found that the number of conflicts was significantly reduced (–49%) with this latter layout even in maximum bicycle demand scenario (270 bph). However, roundabout layout lead to more severe conflicts and potential crashes. The analysis showed that bicycle demands of 75, 95 and 110 bph delivered good environmental and safety outcomes for the intersection.
Evolution of High-energy Particle Distribution in Supernova Remnants
Authors: Zeng Houdun , Xin Yuliang , Liu Siming
Published: March 2019

Supernova remnants (SNRs) have been considered to be the dominant contributors to Galactic cosmic rays. However, the relation between high-energy particles trapped in SNRs and cosmic rays observed at the Earth remains obscure. In this paper, we fit the spectral energy distributions of 35 SNRs with a simple one-zone emission model and analyze correlations of model parameters to uncover the evolution of high-energy particle distribution in SNRs. We find that (1) the particle distribution in general can be described by a broken power-law function with a high-energy cutoff for all SNRs; (2) the low-energy spectrum becomes harder and the break energy decreases with aging of SNRs, (3) for most middle-age SNRs, the energy loss timescale of electrons at the high-energy cutoff is approximately equal to the age of the corresponding remnant implying quenching of very-high-energy electron acceleration; for young SNRs, this energy loss timescale is shorter than the age of SNRs implying continuous electron acceleration at the cutoff energy; and for a few old age SNRs, the energy loss timescale is longer than the corresponding age, which may suggest escaping of higher energy particles from SNRs. Finally, we comment on the implications of these results on the SNR origin of Galactic cosmic rays.
Systematic Physical Characterization of the γ-Ray Spectra of 2FHL Blazars
Authors: van den Berg Jacobus P. , Böttcher Markus , Domínguez Alberto , López-Moya Marcos
Published: March 2019

We test different physically motivated models for the spectral shape of the γ-ray emission in a sample of 128 blazars with known redshifts detected by the Fermi Large Area Telescope (LAT) at energies above 50 GeV. The first nine years of LAT data in the energy range from 300 MeV to 2 TeV are analyzed in order to extend the spectral energy coverage of the 2FHL blazars in our sample. We compare these spectral data to four leptonic models for the production of γ-rays through Compton scattering by a population of electrons with different spectral shapes. In the first three models we consider Compton scattering in the Thomson regime with different acceleration mechanisms for the electrons. In the fourth model we consider Compton scattering by a pure power-law distribution of electrons with spectral curvature due to scattering in the Klein–Nishina regime. The majority of blazar γ-ray spectra are preferentially fit with either a power law with exponential cutoff in the Thomson regime or a power-law electron distribution with Compton scattering in the Klein–Nishina regime, while a log-parabola with a low-energy power-law and broken power-law spectral shape in the Thomson regime appears systematically disfavored, which is likely a consequence of the restriction to pure Thomson scattering that we imposed on those models. This finding may be an indication that the γ-ray emission from flat-spectrum radio quasars (FSRQs) in the 2FHL catalog is dominated by Compton scattering of radiation from the dusty torus, while in the case of BL Lac objects, it is dominated by synchrotron self-Compton radiation.
The First Galaxy Cluster Discovered by the VISTA Variables in the Vía Láctea Survey
Authors: Baravalle L. D. , Castellón J. L. Nilo , Alonso M. V. , Tello J. Díaz , Damke G. , Valotto C. , Larenas H. Cuevas , Sánchez B. , Ríos M. de los , Minniti D. , Domínguez M. , Gurovich S. , Barbá R. , Soto M. , Castro F. Milla
Published: March 2019

We report the first confirmed detection of the galaxy cluster VVV-J144321-611754 at very low latitudes (l = 315.°836, b = −1.°650) located in the tile d015 of the VISTA Variables in the Vía Láctea (VVV) survey. We defined the region of 30 × 30 arcmin2 centered in the brightest galaxy finding 25 galaxies. For these objects, extinction-corrected median colors of (H−K

s
) = 0.34 ± 0.05 mag, (J−H) = 0.57 ± 0.08 mag, and (J−K

s
) = 0.87 ± 0.06 mag; R
1/2 = 1.59 ± 0.″16; C = 3.01 ± 0.08; and Sérsic index n = 4.63 ± 0.39 were estimated. They were visually confirmed showing characteristics of early-type galaxies in the near-IR images. An automatic clustering analysis performed in the whole tile found that the concentration of galaxies VVV-J144321-611754 is a real, compact concentration of early-type galaxies. Assuming a typical galaxy cluster with low X-ray luminosity, the photometric redshift of the brightest galaxy is z = 0.196 ± 0.025. Follow-up near-IR spectroscopy with FLAMINGOS-2 at the Gemini-South telescope revealed that the two brighter cluster galaxies have typical spectra of early-type galaxies and the estimated redshift for the brightest galaxy VVV-J144321.06-611753.9 is z = 0.234 ± 0.022 and that for VVV-J144319.02-611746.1 is z = 0.232 ± 0.019. Finally, these galaxies clearly follow the cluster red sequence in the rest-frame near-IR color–magnitude diagram with a slope similar to a galaxy cluster at a redshift of 0.2. These results are consistent with the presence of a bona fide galaxy cluster beyond the Milky Way disk.
Examination of the EUV Intensity in the Open Magnetic Field Regions Associated with Coronal Holes
Authors: Huang Guan-Han , Lin Chia-Hsien , Lee Lou-Chuang
Published: March 2019

Coronal holes can be identified as the regions with magnetic field lines extending far away from the Sun, or the darkest regions in EUV/X-ray images with predominantly unipolar magnetic fields. A comparison between the locations of our determined regions with open magnetic field lines (OMF) and regions with low EUV intensity (LIR) reveals that only 12% of the OMF regions coincide with the LIRs. The aim of this study is to investigate the conditions leading to the different brightnesses of OMF regions, and to provide a means to predict whether an OMF region would be bright or dark. Examining the statistical distribution profiles of the magnetic field expansion factor (f

s
) and Atmospheric Imaging Assembly 193 Å intensity (I
193) reveals that both profiles are approximately log-normal. The analysis of the spatial and temporal distributions of f

s
and I
193 indicates that the bright OMF regions often are inside or next to regions with closed field lines, including quiet-Sun regions and regions with strong magnetic fields. Examining the relationship between I
193 and f

s
reveals a weak positive correlation between log I
193 and log f

s
, with a correlation coefficient ≈0.39. As a first-order approximation, the positive relationship is determined to be log I
193 = 0.62 log f

s
 + 1.51 based on the principle of the whitening/dewhitening transformation. This linear relationship is demonstrated to increase the consistency between the OMF regions and LIRs from 12% to 23%.
The Evolution of Magnetic Rayleigh–Taylor Unstable Plumes and Hybrid KH-RT Instability into a Loop-like Eruptive Prominence
Authors: Mishra Sudheer K. , Srivastava A. K.
Published: March 2019

MRT-unstable plumes are observed in a loop-like eruptive prominence using Solar Dynamic Observatory/Atmospheric Imaging Assembly observations. The small-scale cavities are developed within the prominence, where perturbations trigger dark plumes (P1 and P2) propagating with speeds of 35–46 km s−1. The self-similar plume formation initially shows the growth of a linear MRT-unstable plume (P1), and thereafter the evolution of a nonlinear single-mode MRT-unstable second plume (P2). A differential emission measure analysis shows that plumes are less dense and hotter than the prominence. We have estimated the observational growth rate for both plumes as 1.32 ± 0.29 × 10−3 s−1 and 1.48 ± 0.29 × 10−3 s−1, respectively, which are comparable to the estimated theoretical growth rate (1.95 × 10−3 s−1). The nonlinear phase of an MRT-unstable plume (P2) may collapse via a Kelvin–Helmholtz vortex formation in the downfalling plasma. Later, a plasma thread is evident in the rising segment of this prominence. It may be associated with the tangled field and Rayleigh–Taylor instability. The tangled field initiates shearing at the prominence–cavity boundary. Due to this shear motion, the plasma downfall occurred at the right part of the prominence–cavity boundary. It triggers the characteristic KH unstable vortices and MRT-unstable plasma bubbles propagating at different speeds and merging with each other. The shear motion and lateral plasma downfall may initiate hybrid KH-RT instability there.
Electromagnetic Waves around the Proton Cyclotron Frequency in the Sheath Regions of Interplanetary Magnetic Clouds: STEREO Observations
Authors: Li Q. H. , Yang L. , Wu D. J. , Wang T. Y.
Published: March 2019

The compressed and turbulent sheath regions of interplanetary magnetic clouds (IMCs) provide a natural laboratory to study electromagnetic waves (EMWs) around the proton cyclotron frequency f
cp. Based on the Morlet wavelet spectral analysis, the repeated filtering analysis and the minimum variance analysis of high-resolution magnetic field data from the STEREO spacecraft, 81 EMW events are identified in the sheath regions of six IMCs. These EMWs are all transverse, almost circularly polarized, and quasi-parallel propagating along the background magnetic field

. They can be left-handed (LH) or right-handed (RH) polarized in the spacecraft frame, where the occurrence rate of the LH-polarized EMWs is higher than that of RH-polarized ones, consistent with previous observations in the solar wind. Also, a comparative analysis of polarization sense of these EMWs has been made in the spacecraft and plasma frames. Our results show that more than half of EMW events suffer a polarization reversal from the spacecraft to plasma frames, which are deduced to propagate inward relative to the solar wind flow. Others are outward-propagating waves. In the plasma frame, the outward-propagating LH-EMWs and inward-propagating RH-EMWs have relatively higher occurrence rates than the inward-propagating LH-EMWs and outward-propagating RH-EMWs, respectively. Furthermore, in the plasma frame all the frequencies of LH-EMWs are below f
cp, but the RH-EMW frequencies can exceed f
cp. These results are helpful in understanding the physical properties of EMWs and their roles in the sheath regions of IMCs.
The Fraction of Active Galactic Nuclei in the USS 1558–003 Protocluster at z = 2.53
Authors: Macuga Michael , Martini Paul , Miller Eric D. , Brodwin Mark , Hayashi Masao , Kodama Tadayuki , Koyama Yusei , Overzier Roderik A. , Shimakawa Rhythm , Tadaki Ken-ichi , Tanaka Ichi
Published: March 2019

The incidence of active galactic nuclei (AGNs) within the local environment is a potentially valuable probe of the mechanisms that trigger and provide fuel for accretion onto supermassive black holes. While the correlation between AGN fraction and environment has been well-studied in the local universe, AGN fractions have been measured for relatively few dense environments at high redshift. In this paper, we present a measurement of the X-ray AGN fraction in the USS 1558−003 protocluster associated with the z = 2.53 radio galaxy 4C-00.62. Our measurement is based on a 100-ks Chandra observation, follow-up spectroscopy from the Multi-Object Double Spectrograph on the Large Binocular Telescope, and broad and narrowband photometry. These data are sensitive to AGNs more luminous than L
X > 2 × 1043 erg s−1 in the rest-frame hard X-ray band (2–10 keV). We have identified two X-ray AGNs at the redshift of USS 1558−003, one of which is the radio galaxy. We have determined that

of the Hα emitters in the protocluster are X-ray AGNs. Unlike most other high-redshift cluster progenitors studied with similar techniques, USS 1558−003 does not have a significantly higher fraction of AGNs than field galaxies at similar redshifts. This lower AGN fraction is inconsistent with the expectation that the higher gas fractions at high redshift, combined with the high galaxy densities and modest relative velocities in protoclusters, should produce higher AGN fractions.
Rapid “Turn-on” of Type-1 AGN in a Quiescent Early-type Galaxy SDSS1115+0544
Authors: Yan Lin , Wang Tinggui , Jiang Ning , Stern Daniel , Dou Liming , Fremling C. , Graham M. J. , Drake A. J. , Yang Chenwei , Burdge K. , Kasliwal M. M.
Published: March 2019

We present a detailed study of a transient in the center of SDSS1115+0544 based on the extensive UV, optical, mid-IR light curves (LCs) and spectra over 1200 days. The host galaxy is a quiescent early-type galaxy at z = 0.0899 with a black hole mass of 2 × 107
M
⊙. The transient underwent a 2.5 mag brightening over ∼120 days, reaching a peak V-band luminosity (extinction corrected) of −20.9 mag, then fading 0.5 mag over 200 days, settling into a plateau of >600 days. Following the optical brightening are the significant mid-IR flares at 3.4 and 4.5 μm, with a peak time delay of ∼180 days. The mid-IR LCs are explained as the echo of UV photons by a dust medium with a radius of 5 × 1017 cm, consistent with E(B − V) of 0.58 inferred from the spectra. This event is very energetic with an extinction corrected L
bol ∼ 4 × 1044 erg s−1. Optical spectra over 400 days in the plateau phase revealed newly formed broad Hα, β emission with a FWHM of ∼3750 km s−1 and narrow coronal lines such as [Fe vii], [Ne v]. This flare also has a steeply rising UV continuum, detected by multi-epoch Swift data at +700 to +900 days post optical peak. The broad Balmer lines and the UV continuum do not show significant temporal variations. The slow evolving LCs over 1200 days, the constant Balmer lines, and UV continuum at late times rule out tidal disruption event and SN IIn as the physical model for this event. We propose that this event is a “turn-on” AGN, transitioning from a quiescent state to a type-1 AGN with a sub-Eddington accretion rate of 0.017 M
⊙ yr−1. This change occurred on a very short timescale of ∼120–200 days. The discovery of such a rapid “turn-on” AGN poses challenges to accretion disk theories and suggests more future detections of similar events.
Neutral Gas Properties and Lyα Escape in Extreme Green Pea Galaxies∗
Authors: McKinney Jed H. , Jaskot Anne E. , Oey M. S. , Yun Min S. , Dowd Tara , Lowenthal James D.
Published: March 2019

Mechanisms regulating the escape of Lyα photons and ionizing radiation remain poorly understood. To study these processes, we analyze Very Large Array 21 cm observations of one Green Pea (GP), J160810+352809 (hereafter J1608), and Hubble Space Telescope Cosmic Origins Spectrograph (COS) spectra of 17 GP galaxies at

. All are highly ionized: J1608 has the highest [O iii] λ5007/[O ii] λ3727 for star-forming galaxies in Sloan Digital Sky Survey, and the 17 GPs have [O iii]/[O
ii] ≥ 6.6. We set an upper limit on J1608's H i mass of

, near or below average compared to similar-mass dwarf galaxies. In the COS sample, eight GPs show Lyα absorption components, six of which also have Lyα emission. The H i column densities derived from Lyα absorption are high,

cm−2 = 19–21, well above the LyC optically thick limit. Using low-ionization absorption lines, we measure covering fractions (

) of 0.1–1 and find that

strongly anticorrelates with Lyα escape fraction. Low covering fractions may facilitate Lyα and LyC escape through dense neutral regions. GPs with

all have low neutral gas velocities, while GPs with lower

have a larger range of velocities. Conventional mechanical feedback may help establish low

in some cases, whereas other processes may be important for GPs with low velocities. Finally, we compare

with proposed indicators of LyC escape. Ionizing photon escape likely depends on a combination of neutral gas geometry and kinematics, complicating the use of emission-line diagnostics for identifying LyC emitters.
NOISE LEVELS OF ORTHOPEDIC INSTRUMENTS AND THEIR POTENTIAL HEALTH RISKS
Authors: Holmes George B , Goodman Kathy Landau , Hang David W , McCorvey V Monique
Published: March 2019

ABSTRACT

Exposure to intense levels of noise has been identified as a potential workplace risk for the development of hearing impairment for health care workers. With this knowledge a noise level survey was performed on selected orthopedic equipment. Several instruments produced threshold levels of 95 dBA to 106 dBA. Often these levels remained as high as 90 dBA at 4 ft from the source. Based on the results of this survey, audiometric tests were conducted on five cast technicians to determine the prevalence of noise-induced hearing loss (NIHL). Audiometric measurements of the cast technicians indicated that, in the absence of other risk factors for hearing loss, there was an association between the presence of NIHL and the years of exposure. NIHL was most evident on the side of the dominant hand used for holding the cast cutter. These findings suggest there may be a risk of NIHL from the occupational exposure to various orthopedic instruments. Further, this level of risk may warrant the use of an individual hearing protection device or the development of quieter instruments.
Comparative Analysis of Bridges Construction Methods Using Bridge Information Modeling
Authors: Marzouk Mohamed , Hisham Mohamed
Published: March 2019

Bridge information modeling (BrIM) has widely become an efficient tool in the bridge engineering and construction industry. It has been used in pre-fabrication, obtaining accurate quantity surveys, and creating accurate shop drawings. This article presents the utilization of bridge information modeling (BrIM) in determining the optimum construction methods of concrete bridges in bridge projects in Egypt using systematic procedures taking into account: bridge physical properties, construction cost, and site conditions. Bridge information modeling (BrIM) has proven to be an effective tool in determining the optimum construction methods of concrete bridges. The proposed BrIM approach is capable of obtaining feasible construction methods and associated construction costs based on bridge physical characteristics.
Human Action Recognition Using Median Background and Max Pool Convolution with Nearest Neighbor
Authors: Lakshmi Bagavathi , S.Parthasarathy
Published: March 2019

Discovering human activities on mobile devices is a challenging task for human action recognition. The ability of a device to recognize its user's activity is important because it enables context-aware applications and behavior. Recently, machine learning algorithms have been increasingly used for human action recognition. During the past few years, principal component analysis and support vector machines is widely used for robust human activity recognition. However, with global dynamic tendency and complex tasks involved, this robust human activity recognition (HAR) results in error and complexity. To deal with this problem, a machine learning algorithm is proposed and explores its application on HAR. In this article, a Max Pool Convolution Neural Network based on Nearest Neighbor (MPCNN-NN) is proposed to perform efficient and effective HAR using smartphone sensors by exploiting the inherent characteristics. The MPCNN-NN framework for HAR consists of three steps. In the first step, for each activity, the features of interest or foreground frame are detected using Median Background Subtraction. The second step consists of organizing the features (i.e. postures) that represent the strongest generic discriminating features (i.e. postures) based on Max Pool. The third and the final step is the HAR based on Nearest Neighbor that postures which maximizes the probability. Experiments have been conducted to demonstrate the superiority of the proposed MPCNN-NN framework on human action dataset, KARD (Kinect Activity Recognition Dataset).
Auditory Noise Can Facilitate Body's Peripheral Temperature Switchovers
Authors: Lugo Eduardo , Doti Rafael , Faubert Jocelyn
Published: March 2019

Home is the context of an ambient-intelligence environment. Nonetheless, one can downsize the environment. For example, the human body as an environment, and by reading all possible bio-signals, this article can create control loops where many of these bio-signals can be used as sensory inputs to make humans aware of their current perceptual-cognitive state. In this article, the authors present an example where the peripheral temperature is used as a marker to know when a human switchover from a stress state to a calm state happens. The switchovers are controlled by the sympathetic and parasympathetic nervous system. The authors showed that finger temperature can be modulated by an effective auditory noise, and in four of the six tested subjects, 70 dBSPL was the optimal noise. These results open the possibility of making personalized, adaptive and anticipatory devices capable of modulating the switchover from a stress state to a calm state.
Identification and Prevention of Joint Gray Hole and Black Hole Attacks
Authors: Trivedi Munesh C. , Malhotra Sachin
Published: March 2019

Ad-hoc networks consist of a set of autonomous communicating devices that can communicate with each other by establishing multi-hop radio connections, and these connections are maintained in a localized manner. In these types of networks, especially where the nature of communicating nodes is mobile, e.g., MANETs, maintaining security remains a serious challenge due to their wireless, open, and shared communication medium, reliance on cooperative algorithms, dynamically adaptable topologies, an absence of centralized watching points, etc. Most of the existing protocols, utilized for routing in MANETs are susceptible to diverse varieties of attacks. However, it is also susceptible to the well-known gray and black hole attacks. In these types of attacks, malicious nodes are incorrectly advertised as sensible ways to a destination node throughout the route discovery method. This attack becomes complicated when a bunch of malicious nodes are acting together. In this work, a novel mechanism is introduced to identify the malicious node or nodes that have tried to perform malicious activity. Here, identification is made by their increased data routing information (DRI).
IoT Data Compression and Optimization Techniques in Cloud Storage
Authors: Hossain Kaium , Rahman Mizanur , Roy Shanto
Published: March 2019

This article presents a detailed survey on different data compression and storage optimization techniques in the cloud, their implications, and discussion over future directions. The development of the smart city or smart home systems lies in the development of the Internet of Things (IoT). With the increasing number of IoT devices, the tremendous volume of data is being generated every single day. Therefore, it is necessary to optimize the system's performance by managing, compressing and mining IoT data for smart decision support systems. In this article, the authors surveyed recent approaches with up-to-date outcomes and findings related to the management, mining, compression, and optimization of IoT data. The authors then discuss the scopes and limitations of present works and finally, this article presents the future perspectives of IoT data management on basis of cloud, fog, and mobile edge computing.
Design and Implementation of Active Stream Data Warehouses
Authors: Bimonte Sandro , Boussaid Omar , Schneider Michel , Ruelle Fabien
Published: March 2019

In the era of Big Data, more and more stream data is available. In the same way, Decision Support Systems (DSS) tools, such as data warehouses and alert systems, become more and more sophisticated, and conceptual modeling tools are consequently mandatory for successfully DSS projects. Formalisms such as UML and ER have been widely used in the context of classical information and data warehouse systems, but they have not been investigated yet for stream data warehouses to deal with alert systems. Therefore, in this article, the authors introduce the notion of Active Stream Data Warehouse (ASDW) and this article proposes a UML profile for designing Active Stream Data Warehouses. Indeed, this article extends the ICSOLAP profile to take into account continuous and window OLAP queries. Moreover, this article studies the duality of the stream and OLAP decision-making process and the authors propose a set of ECA rules to automatically trigger OLAP operators. The UML profile is implemented in a new OLAP architecture, and it is validated using an environmental case study concerning the wind monitoring.
Role-Playing Game for Training a Design Process of Startup Company Compensation Plan
Authors: Kim Sangkyun
Published: March 2019

A compensation plan that continuously motivates the employees of a startup company is very important because the employees are usually more worried about the stability and potential growth of their company than the employees of large enterprises. It is therefore important to educate personnel in the human resources department of a startup company to properly design a compensation plan. However, it is not easy to train personnel to do this. In order to properly design a compensation plan, the employees must be trained to correctly understand content theories and process theories, and should apply the theories considering the practical constraints of the enterprise. This study used a gamification program based on role playing to design a compensation plan for a startup company to give trainees a greater sense of reality and immersion. The gamification program suggested in this article was analyzed to be effective in motivating and giving fun to the trainees. This gamification program would be used effectively to train personnel in the human resources department of startup companies.
Handling Constraints Using Penalty Functions in Materialized View Selection
Authors: Gosain Anjana , Sachdeva Kavita
Published: March 2019

Materialized view selection (MVS) plays a vital role for efficiently making decisions in a data warehouse. This problem is NP-hard and constrained optimization problem. The authors have handled both the space and maintenance cost constraint using penalty functions. Three penalty function methods i.e. static, dynamic and adaptive penalty functions have been used for handling constraints and Backtracking Search Optimization algorithm (BSA) has been used for optimizing the total query processing cost. Experiments were conducted comparing the static, dynamic and adaptive penalty functions on varying the space constraint. The adaptive penalty function method yields the best results in terms of minimum query processing cost and achieves the optimality, scalability and feasibility of the problem on varying the lattice dimensions and on increasing the number of user queries. The authors proposed work has been compared with other evolutionary algorithms i.e. PSO and genetic algorithm and yields better results in terms of minimum total query processing cost of the materialized views.
Fuzzy Based Parameter Adaptation in ACO for Solving VRP
Authors: Sandhya  , Goel Rajiv
Published: March 2019

Ant Colony Optimization, a popular class of metaheuristics, have been widely applied for solving optimization problems like Vehicle Routing Problem. The performance of ACO is affected by the values of parameters used. However, in literature, few methods are proposed for parameter adaptation of ACO. In this article, a fuzzy-based parameter control mechanism for ACO has been developed. Three adaptive strategies FACO-1, FACO-2, FACO-3 are proposed for determining values of parameters alpha and beta, and evaporation factor separately as well as for all three parameters simultaneously. The performance of proposed strategies is compared with standard ACS on TSP and VRP benchmarks. Computational results on standard benchmark problems shows the effectiveness of the strategies.
An Exploratory Study on Co-Locating Voter Registration in Telecentres Case of Malawi
Authors: Makoza Frank
Published: March 2019

This article explores how co-locating voter registration at telecentres can address some of the challenges in the electoral process of a developing country. A case in Malawi was analysed using secondary data. A general inductive approach was used to analyse media reports on voter registration. The general inductive approach supported the development of themes for explaining the role of telecentres in addressing some of the challenges for voter registration. The study showed that the voter registration process has problems without obvious solutions including operational, social and political issues. Some of the problems can be mitigated utilising the services in telecentres. The services were mainly technical, logistical and communication. The study proposes a model for collaborative service delivery which suggests factors to be considered when co-locating voter registration in telecentres.
En Wear-Resisting Properties of Epoxy/WC-Co/Al Coating on 300M Steel
Authors: Ding Feng , Li Shu Qin , Zhang Ping Ze , Wei Dong Bo , Chen Xiao Hu , Wang Shi Yuan
Published: March 2019

Based on surface protection problems of the steel part of the landing gear, wear-resisting properties of tungsten carbide-cobalt (WC-Co) particles reinforced epoxy (WRE) coatings were investigated in this paper. The curing process of WRE coating was analyzed by DSC, TG and IR. The wear performance under different rotational speed WRE coating was studied respectively. The specific wear rates of the WRE coating at 560 rpm and 840 rpm are 6.04 ×10−4mm3N−1m−1and 9.55 ×10−4mm3N−1m−1respectively, about only 60% of that of the uncoated sample. Thus, this could be summarized that WRE coating had a good wear resistance.
PVA and PVP Hydrogel Blends for Wound Dressing: Synthesis and Characterisation
Authors: Muresan-Pop Marieta , Magyari Klara , Vulpoi Adriana
Published: March 2019

The purpose of this study is the development and characterizations of novel polyvinyl alcohol (PVA)/polyvinyl pyrolidone (PVP) hydrogel blends. Different mixtures of the two polymeric solutions leaded to several hydrogels that were further characterized using X-ray difraction (XRD), differential thermal and thermogravimetric analysis (DTA/TGA) and Fourier transform infrared spectroscopy (FTIR). The influence of the polymer type on hydrogel hydration was also studied, by observing and comparing the samples after drying and rehydration in bidistilled water. The results revealed the maintenance of the amorphous character of the hydrogels after rehydration as well as a higher softening and decomposition temperature in direct relation with the increase of PVA content. The best wetting and swelling results were also given by the hydrogel with the highest PVA content prepared at pH 6.
High-Dimensional Characterization of IL-10 Production and IL-10–Dependent Regulation during Primary Gammaherpesvirus Infection
Authors: Kimball Abigail K , Oko Lauren M , Kaspar Rachael E , van Dyk Linda F , Clambey Eric T
Published: March 2019

IL-10 is a potent immunomodulatory cytokine produced by multiple cell types to restrain immune activation. Many herpesviruses use the IL-10 pathway to facilitate infection, but how endogenous IL-10 is regulated during primary infection in vivo remains poorly characterized. In this study, we infected mice with murine gammaherpesvirus 68 (γHV68) and analyzed the production and genetic contribution of IL-10 by mass cytometry (cytometry by time-of-flight) analysis. γHV68 infection elicited a breadth of effector CD4 T cells in the lungs of acutely infected mice, including a highly activated effector subset that coexpressed IFN-γ, TNF-α, and IL-10. By using IL-10 GFP transcriptional reporter mice, we identified that IL-10 was primarily expressed within CD4 T cells during acute infection in the lungs. IL10gfp-expressing CD4 T cells were highly proliferative and characterized by the expression of multiple coinhibitory receptors, including PD-1 and LAG-3. When we analyzed acute γHV68 infection of IL-10–deficient mice, we found that IL-10 limits the frequency of both myeloid and effector CD4 T cell subsets in the infected lung, with minimal changes at a distant mucosal site. These data emphasize the unique insights that high-dimensional analysis can afford in investigating antiviral immunity and provide new insights into the breadth, phenotype, and function of IL-10–expressing effector CD4 T cells during acute virus infection.
Distribution of resonances for analytic asymptotically hyperbolic spaces
Authors: Wang Yiran
Published: March 2019

For a class of asymptotically hyperbolic metrics on the unit ball

\mathbb B^3

, we study the meromorphic properties of the resolvent of the Laplacian. In particular, we prove the existence of logarithmic type regions free of resonances (poles of the resolvent). Also, away from the region where the resonances may accumulate, we obtain a polynomial bound on the growth of the number of resonances in disks.
Modelización de cerámicas y transductores piezoeléctricos vibrando en espesor mediante matrices de transferencia
Authors: Jiménez Noé , Camarena Francisco
Published: March 2019

En este trabajo presentamos la modelización de una cerámica piezoeléctrica vibrando en modo espesor empleando matrices de transferencia. La modelización completa del comportamiento vibratorio de un material piezoeléctrico es un problema complejo. Ello es debido principalmente al carácter tensorial de los esfuerzos junto a la anisotropía de los sólidos piezoeléctricos, tanto en sus propiedades elásticas como piezoeléctricas. Este es un problema recurrente en la docencia de Acústica y Ultrasonidos, Telecomunicaciones y sensores electrónicos. La modelización mediante matrices de transferencia proporciona un método simple pero preciso, pues captura los principales fenómenos físicos del problema electromecánico. En particular, la modelización presentada permite al estudiante por un lado obtener un modelo analítico del efecto piezoeléctrico y el estudio del sistema eléctrico-elástico, y por otro lado permite un elevado grado de libertad para modificar el diseño añadiendo capas de diferentes materiales y/o componentes electrónicos.
Análisis de redes sociales mediante cadenas de Markov
Authors: Carreño Sanchez Amanda , Sanabria Codesal Esther
Published: March 2019

El objetivo de este trabajo es mostrar un modelo matemático sencillo, aplicado al análisis de las redes sociales, que potencie el interés de los alumnos en la asignatura Matemáticas I. El planteamiento y la resolución de este modelo, basado en las cadenas de Markov, nos permiten ilustrar la aplicabilidad los sistemas de ecuaciones discretas y reforzar los conceptos de autovalores, autovectores y diagonalización. Utilizaremos el software de cálculo Mathematica, al que tienen acceso los estudiantes de la asignatura, para resolver el problema, lo que facilitará trabajar con diversos modelos y dimensiones grandes.
The Right to Remain in the City: How One Community Has Used Legal Rights and Rights Talk to Stay Put in Bangkok
Authors: Shelby Hayden
Published: March 2019

In this exploratory piece, I present a case study of the complex machinations of one community in Bangkok in their 13-year struggle to stay on their land. I ask how legal rights, rights talk, and political maneuvering figure into their strategies, as well as how their involvement with a larger social movement has shaped their efforts. The non-traditional form of the piece allows me to walk step-by-step through the community and the processes at play while considering multiple framings that may help us better understand the community’s situation.