bluuebunny/crossref_metadata_2025 huggingface dataset:
The Valencia Eustress-Distress Appraisal Scale (VEDAS): Validation of the Italian Version
Authors: Di Fabio Annamaria , Peiró José María , Rodríguez Isabel , Kozusznik Malgorzata Wanda
Published: October 2018

The aim of this study is to validate the Italian version of the Valencia Eustress-Distress Appraisal Scale (VEDAS). Two hundred and thirty-two Italian workers were involved in the study. Dimensionality, reliability, and concurrent validity were analyzed. Confirmatory factor analysis supported a four-dimensional structure. In addition, the Italian version of the scale showed good internal consistency and validity. The results indicate that the Italian version of the VEDAS is a valid instrument for measuring eustress and distress appraisal in the Italian context.
A Novel Aesthetic QR Code Algorithm Based on Hybrid Basis Vector Matrices
Authors: Lu Jianfeng , Cheng Weiling , Zhang Shanqing , Li Li , Yang Zaorang , Chang Chin-Chen
Published: October 2018

Recently, more and more research has focused on the beautification technology of QR (Quick Response) codes. In this paper, a novel algorithm based on the XOR (exclusive OR) mechanism of hybrid basis vector matrices and a background image synthetic strategy is proposed. The hybrid basis vector matrices include the reverse basis vector matrix (RBVM) and positive basis vector matrix (PBVM). Firstly, the RBVM and PBVM are obtained by the Gauss–Jordan elimination method, according to the characteristics of the RS code. Secondly, the modification of the parity area of the QR code can be applied with the XOR operation of the RBVM, and the XOR operation of the PBVM is used to change the data area of the QR code. So, the QR code can be modified to be very close to the background image without impacting the error-correction ability. Finally, in order to further decrease the difference between the QR code and the background image, a new synthesis strategy is adopted in order to obtain a better aesthetic effect. The experimental results show that it obtains a better visual effect without the sacrificing recognition rate.
Modeling of Free-Form Complex Curves Using SG-Bézier Curves with Constraints of Geometric Continuities
Authors: Hu Gang , Bo Cuicui , Wu Junli , Wei Guo , Hou Fei
Published: October 2018

The modeling of free-form engineering complex curves is an important subject in product modeling, graphics, and computer aided design/computer aided manufacturing (CAD/CAM). In this paper, we propose a novel method to construct free-form complex curves using shape-adjustable generalized Bézier (or SG-Bézier, for short) curves with constraints of geometric continuities. In order to overcome the difficulty that most of the composite curves in engineering cannot often be constructed by using only a single curve, we propose the necessary and sufficient conditions for G1 and G2 continuity between two adjacent SG-Bézier curves. Furthermore, the detailed steps of smooth continuity for two SG-Bézier curves, and the influence rules of shape parameters on the composite curves, are studied. We also give some important applications of SG-Bézier curves. The modeling examples show that our methods in this paper are very effective, can easily be performed, and can provide an alternative powerful strategy for the design of complex curves.
Isolation and Characterization of Poecistasin, an Anti-Thrombotic Antistasin-Type Serine Protease Inhibitor from Leech Poecilobdella manillensis
Authors: Tang Xiaopeng , Chen Mengrou , Duan Zilei , Mwangi James , Li Pengpeng , Lai Ren
Published: October 2018

Antistasin, first identified as a potent inhibitor of the blood coagulation factor Xa, is a novel family of serine protease inhibitors. In this study, we purified a novel antistasin-type inhibitor from leech Poecilobdella manillensis called poecistasin. Amino acid sequencing of this 48-amino-acid protein revealed that poecistasin was an antistasin-type inhibitor known to consist of only one domain. Poecistasin inhibited factor XIIa, kallikrein, trypsin, and elastase, but had no inhibitory effect on factor Xa and thrombin. Poecistasin showed anticoagulant activities. It prolonged the activated partial thromboplastin time and inhibited FeCl3-induced carotid artery thrombus formation, implying its potent function in helping Poecilobdella manillensis to take a blood meal from the host by inhibiting coagulation. Poecistasin also suppressed ischemic stroke symptoms in transient middle cerebral artery occlusion mice model. Our results suggest that poecistasin from the leech Poecilobdella manillensis plays a crucial role in blood-sucking and may be an excellent candidate for the development of clinical anti-thrombosis and anti-ischemic stroke medicines.
Cyanotoxins and Cyanobacteria Cell Accumulations in Drinking Water Treatment Plants with a Low Risk of Bloom Formation at the Source
Authors: Almuhtaram Husein , Cui Yijing , Zamyadi Arash , Hofmann Ron
Published: October 2018

Toxic cyanobacteria have been shown to accumulate in drinking water treatment plants that are susceptible to algal blooms. However, the risk for plants that do not experience algal blooms, but that receive a low influx of cells, is not well known. This study determined the extent of cell accumulation and presence of cyanotoxins across the treatment trains of four plants in the Great Lakes region. Samples were collected for microscopic enumeration and enzyme-linked immunosorbent assay (ELISA) measurements for microcystins, anatoxin-a, saxitoxin, cylindrospermopsin, and β-methylamino-L-alanine (BMAA). Low cell influxes (under 1000 cells/mL) resulted in significant cell accumulations (over 1 × 105 cells/mL) in clarifier sludge and filter backwash samples. Microcystins peaked at 7.2 µg/L in one clarifier sludge sample, exceeding the raw water concentration by a factor of 12. Anatoxin-a was detected in the finished drinking water of one plant at 0.6 µg/L. BMAA may have been detected in three finished water samples, though inconsistencies among the BMAA ELISAs call these results into question. In summary, the results show that plants receiving a low influx of cells can be at risk of toxic cyanobacterial accumulation, and therefore, the absence of a bloom at the source does not indicate the absence of risk.
Multi-Occurrence of Twenty Mycotoxinsin Pasta and a Risk Assessment in the Moroccan Population
Authors: Bouafifssa Youssef , Manyes Lara , Rahouti Mohamed , Mañes Jordi , Berrada Houda , Zinedine Abdellah , Fernández-Franzón Mónica
Published: October 2018

In the present study, the multi-occurrence of twenty (20) mycotoxins in pasta samples consumed in Morocco was assessed. For this, a modified Quick, Easy, Cheap Effective, Rugged, and Safe method was validated. The mycotoxins studied were identified and quantified by liquid chromatography–tandem mass spectrometry (LC–MS/MS) and gas chromatography–tandem mass spectrometry (GC-MS/MS). The validated method was applied to one hundred and six (n = 106) pasta samples purchased from several areas in the country. The analytical results showed that 99 out of 106 total samples (93.4%) were contaminated with at least one mycotoxin. Nine mycotoxins (Aflatoxin B1, Enniatin B, Enniatin B1, Enniatin A1, Zearalenone, Deoxynivalenol, 3-Acetyl-Deoxynivalenol, T-2, and HT-2 toxins) were present in the pasta samples. Enniatin B and Enniatin B1 were the predominant mycotoxins. The Zearalenone, Deoxynivalenol, HT-2, and T-2 toxins were present in 51.8%, 43.5%, 34.9%, and 16% of samples, respectively. Aflatoxin B1 was detected in only 2 samples. Risk exposure assessment concluded that mycotoxin levels found in pasta do not pose a significant human health risk for the Moroccan population. This is the first paper drafted on the multi-occurrence of mycotoxins in pasta from this country.
Proteomic Characterization of Two Medically Important Malaysian Snake Venoms, Calloselasma rhodostoma (Malayan Pit Viper) and Ophiophagus hannah (King Cobra)
Authors: Kunalan Sugita , Othman Iekhsan , Syed Hassan Sharifah , Hodgson Wayne C.
Published: October 2018

Calloselasma rhodostoma (CR) and Ophiophagus hannah (OH) are two medically important snakes found in Malaysia. While some studies have described the biological properties of these venoms, feeding and environmental conditions also influence the concentration and distribution of snake venom toxins, resulting in variations in venom composition. Therefore, a combined proteomic approach using shotgun and gel filtration chromatography, analyzed by tandem mass spectrometry, was used to examine the composition of venoms from these Malaysian snakes. The analysis revealed 114 proteins (15 toxin families) and 176 proteins (20 toxin families) in Malaysian Calloselasma rhodostoma and Ophiophagus hannah species, respectively. Flavin monoamine oxidase, phospholipase A2, phosphodiesterase, snake venom metalloproteinase, and serine protease toxin families were identified in both venoms. Aminopeptidase, glutaminyl-peptide cyclotransferase along with ankyrin repeats were identified for the first time in CR venom, and insulin, c-type lectins/snaclecs, hepatocyte growth factor, and macrophage colony-stimulating factor together with tumor necrosis factor were identified in OH venom for the first time. Our combined proteomic approach has identified a comprehensive arsenal of toxins in CR and OH venoms. These data may be utilized for improved antivenom production, understanding pathological effects of envenoming, and the discovery of biologically active peptides with medical and/or biotechnological value.
Correction: Sando E. et al. Serological Cross-Reactivity among Orientia tsutsugamushi Serotypes but Not with Rickettsia japonica in Japan. Trop. Med. Infect. Dis. 2018, 3, 74.
Authors: Sando Eiichiro , Ariyoshi Koya , Fujita Hiromi
Published: October 2018

The authors wish to make the following corrections to this paper [...]
Pantoea Bacteriophage vB_PagS_Vid5: A Low-Temperature Siphovirus That Harbors a Cluster of Genes Involved in the Biosynthesis of Archaeosine
Authors: Šimoliūnas Eugenijus , Šimoliūnienė Monika , Kaliniene Laura , Zajančkauskaitė Aurelija , Skapas Martynas , Meškys Rolandas , Kaupinis Algirdas , Valius Mindaugas , Truncaitė Lidija
Published: October 2018

A novel low-temperature siphovirus, vB_PagS_Vid5 (Vid5), was isolated in Lithuania using Pantoea agglomerans isolate for the phage propagation. The 61,437 bp genome of Vid5 has a G–C content of 48.8% and contains 99 probable protein encoding genes and one gene for tRNASer. A comparative sequence analysis revealed that 46 out of 99 Vid5 open reading frames (ORFs) code for unique proteins that have no reliable identity to database entries. In total, 33 Vid5 ORFs were given a putative functional annotation, including those coding for the proteins responsible for virion morphogenesis, phage-host interactions, and DNA metabolism. In addition, a cluster of genes possibly involved in the biosynthesis of 7-deazaguanine derivatives was identified. Notably, one of these genes encodes a putative preQ0/preQ1 transporter, which has never been detected in bacteriophages to date. A proteomic analysis led to the experimental identification of 11 virion proteins, including nine that were predicted by bioinformatics approaches. Based on the phylogenetic analysis, Vid5 cannot be assigned to any genus currently recognized by ICTV, and may represent a new one within the family of Siphoviridae.
Promoting Water Conservation: Where to from here?
Authors: Moglia Magnus , Cook Stephen , Tapsuwan Sorada
Published: October 2018

This paper reports on a review of international water conservation efforts, but with a particular focus on the Australian context. The aim is to take stock of the current understanding of water conservation, in particular: what influences people’s decision to conserve water, what influences whether people persist with water conservation behavior and what contributes to awareness and familiarity of water conservation behaviors. We also explore how all these factors jointly can achieve water savings over time, and the efficacy of past efforts to save water. Subsequently, this is used to identify where leading practice for managing water conservation is heading, which we argue is the application of recent developments in behavioral science and advances in smart metering to personalize water conservation programs. To support individualized water conservation efforts, we need more longitudinal studies of water conservation behavior, a greater focus on behavioral science, as well as the development of modelling tools that embed insights and lessons of this research into decision support capability. This can help to develop the capacity to better implement water conservation programs that respond to short-term water scarcity crises, such as droughts, while also providing persistent reductions in per-capita water demand that can help meet strategic water planning needs, such as deferring or downsizing capital investment in supply infrastructure to accommodate demands associated with population growth.
Configuring Green Infrastructure for Urban Runoff and Pollutant Reduction Using an Optimal Number of Units
Authors: Martínez Carlos , Sanchez Arlex , Galindo Roberto , Mulugeta Aelaf , Vojinovic Zoran , Galvis Alberto
Published: October 2018

Green infrastructure (GI) has been regarded as an effective intervention for urban runoff reduction. Despite the growing interest in GI, the technical knowledge that is needed to demonstrate their advantages, cost, and performance in reducing runoff and pollutants is still under research. The present paper describes a framework that aims to obtain the optimal configuration of GI (i.e., the optimal number of units distributed within the catchment) for urban runoff reduction. The research includes an assessment of the performance of GI measures dealing with pollution load, peak runoff, and flood volume reduction. The methodological framework developed includes: (1) data input, (2) GI selection and placement, (3) hydraulic and water quality modelling, and (4) assessing optimal GI measures. The framework was applied in a highly urbanized catchment in Cali, Colombia. The results suggest that if the type of GI measure and its number of units are taken into account within the optimisation process, it is possible to achieve optimal solutions to reduce the proposed reduction objectives with a lower investment cost. In addition, the results also indicate a pollution load, peak runoff, and flood volume reduction for different return periods of at least 33%, 28%, and 60%, respectively. This approach could assist water managers and their stakeholders to assess the trade-offs between different GI.
Reciprocal scope revisited
Authors: Haug Dag Trygve Truslew , Dalrymple Mary
Published: October 2018

The most influential approaches to reciprocals (Heim, Lasnik and May 1991, Dalrymple et al. 1998) involve a scoping operator, but there are good arguments by Murray (2008) and Dotlačil (2013) that reciprocals do not involve distributive quantification but are instead pronouns with both coference and noncoreference requirements. However, the latter analyses cannot straighforwardly account for apparent scopal variability in complex sentences with reciprocals. In this paper we extend the pronominal analysis of reciprocals to long distance cases by extending the original plural CDRT (Brasoveanu 2007) analysis with ideas from partial CDRT (Haug 2014).
Than clauses as embedded questions
Authors: Fleisher Nicholas
Published: October 2018

Quantifiers in comparative than clauses often appear to take scope at the matrix level, a phenomenon that has spawned a large recent literature. Here I reopen an old line of investigation that seeks illumination in the strikingly similar behavior of quantifiers in embedded questions. A novel observation in this connection is that English clausal comparatives support quantificational variability effects. I explore the possibility of treating than clauses as embedded questions, sketching two implementations, and weigh this type of analysis against recent approaches that invoke degree pluralities. I also discuss multiple-wh configurations in clausal comparatives.
Rising Imperatives
Authors: Rudin Deniz
Published: October 2018

This paper provides an account of imperatives accompanied by rising intonation, formalized within the Table model. It argues that rising imperatives are conventionally weak, lacking speaker commitment.
THE OVERVIEW-ANALYTICAL DOCUMENT OF THE INTERNATIONAL EXPERIENCE OF BUILDING SMART CITY
Authors: Bashynska Iryna , Dyskina Anastasia
Published: October 2018

The population of the planet is constantly growing, people are moving to the cities. Recently, more and more interest is being given to smart cities as a guarantee of at least comfortable living of citizens, as a maximum – an ultramodern autonomous city with artificial intellect, anticipating the needs of residents, capable of functioning autonomously for a long time. The purpose of the article is to analyze the experience of smart cities, highlight the distinctive and common features and outline the initial stages of the route map for the development of a specific city into a smart city. After the study, it became clear that the concept of “smart city” is very broad, scientists are investing a huge number of parameters that characterize a smart city, but it was possible to identify common characteristics. Also, the hypothesis was tested that the city’s urbanization should be oriented towards the inhabitants of this city, i.е. implemented not by a single algorithm, but by an algorithm that is adapted to the needs of a particular city. We proposed a methodology for the preparatory stage of the city’s self-mastering, which is based on expert assessments by a prior ranking, includes 2 stages and which was tested on the example of Odessa (Ukraine). At the first stage, the questionnaire contained questions about the six main characteristics of a smart city. At this stage three characteristics were singled out, which are of particular concern to Odessa citizens and the second survey contained 36 clarifying questions only for these three characteristics. The results allowed to distinguish 6 characteristics from which it is necessary to start Odessa’s growth as a smart city.
Properties and Occurrence Rates for Kepler Exoplanet Candidates as a Function of Host Star Metallicity from the DR25 Catalog
Authors: Narang Mayank , Manoj P. , Furlan E. , Mordasini C. , Henning Thomas , Mathew Blesson , Banyal Ravinder K. , Sivarani T.
Published: October 2018

Correlations between the occurrence rate of exoplanets and their host star properties provide important clues about the planet formation process. We studied the dependence of the observed properties of exoplanets (radius, mass, and orbital period) as a function of their host star metallicity. We analyzed the planetary radii and orbital periods of over 2800 Kepler candidates from the latest Kepler data release, DR25 (Q1–Q17), with revised planetary radii based on Gaia DR2 as a function of host star metallicity (from the Q1–Q17 (DR25) stellar and planet catalog). With a much larger sample and improved radius measurements, we are able to reconfirm previous results in the literature. We show that the average metallicity of the host star increases as the radius of the planet increases. We demonstrate this by first calculating the average host star metallicity for different radius bins and then supplementing these results by calculating the occurrence rate as a function of planetary radius and host star metallicity. We find a similar trend between host star metallicity and planet mass: the average host star metallicity increases with increasing planet mass. This trend, however, reverses for masses >4.0 M
J: host star metallicity drops with increasing planetary mass. We further examined the correlation between the host star metallicity and the orbital period of the planet. We find that for planets with orbital periods less than 10 days, the average metallicity of the host star is higher than that for planets with periods greater than 10 days.
The 2016 Reactivations of the Main-belt Comets 238P/Read and 288P/(300163) 2006 VW139*
Authors: Hsieh Henry H. , Ishiguro Masateru , Kim Yoonyoung , Knight Matthew M. , Lin Zhong-Yi , Micheli Marco , Moskovitz Nicholas A. , Sheppard Scott S. , Thirouin Audrey , Trujillo Chadwick A.
Published: October 2018

We report observations of the reactivations of the main-belt comets (MBCs) 238P/Read and 288P/(300163) 2006 VW139 that also track the evolution of each object’s activity over several months in 2016 and 2017. We additionally identify and analyze archival SDSS data showing 288P to have been active in 2000, meaning that both 238P and 288P have now each been confirmed to be active near perihelion on three separate occasions. From data obtained of 288P from 2012–2015 when it appeared inactive, we find best-fit R-band H, G phase function parameters of H

R
 = 16.80 ± 0.12 mag and G

R
 = 0.18 ± 0.11, corresponding to effective component radii of r

c
 = 0.80 ± 0.04 km, assuming a binary system with equally sized components. Fitting linear functions to ejected dust masses inferred for 238P and 288P soon after their observed reactivations in 2016, we find an initial average net dust production rate of

kg s−1 and a best-fit start date of 2016 March 11 (when the object was at a true anomaly of ν = −63°) for 238P, and an initial average net dust production rate of

kg s−1 and a best-fit start date of 2016 August 5 (when the object was at ν = −27°) for 288P. Applying similar analyses to archival data, we find similar start points for previous active episodes for both objects, suggesting that minimal mantle growth or ice recession occurred between the active episodes in question. Some changes in dust production rates between active episodes are detected, however. More detailed dust modeling is suggested to further clarify the process of activity evolution in MBCs.
Generation of Turbulence in Colliding Reconnection Jets
Authors: Pucci Francesco , Matthaeus William H. , Chasapis A. , Servidio Sergio , Sorriso-Valvo L. , Olshevsky V. , Newman D. L. , Goldman M. V. , Lapenta Giovanni
Published: October 2018

The collision of magnetic reconnection jets is studied by means of a three-dimensional numerical simulation at the kinetic scale, in the presence of a strong guide field. We show that turbulence develops due to the collision of jets, producing several current sheets in reconnection outflows, aligned with the guide field direction. The turbulence is mainly two-dimensional, with stronger gradients in the plane perpendicular to the guide field and low wave-like activity in the parallel direction. First, we provide a numerical method to isolate the central turbulent region. Second, we analyze the spatial second-order structure function and prove that turbulence is confined in this region. Finally, we compute local magnetic and electric frequency spectra, finding a trend in the subion range that differs from typical cases for which the Taylor hypothesis is valid, as well as wave activity in the range between ion and electron cyclotron frequencies. Our results are relevant to understand observed collisions of reconnection jets in space plasmas.
The Missing Satellites of the Magellanic Clouds? Gaia Proper Motions of the Recently Discovered Ultra-faint Galaxies
Authors: Kallivayalil Nitya , Sales Laura V. , Zivick Paul , Fritz Tobias K. , Del Pino Andrés , Sohn Sangmo Tony , Besla Gurtina , van der Marel Roeland P. , Navarro Julio F. , Sacchi Elena
Published: October 2018

According to LCDM theory, hierarchical evolution occurs on all mass scales, implying that satellites of the Milky Way should also have companions. The recent discovery of ultra-faint dwarf galaxy candidates in close proximity to the Magellanic Clouds provides an opportunity to test this theory. We present proper motion (PM) measurements for 13 of the 32 new dwarf galaxy candidates using Gaia data release 2. All 13 also have radial velocity measurements. We compare the measured 3D velocities of these dwarfs to those expected at the corresponding distance and location for the debris of a Large Magellanic Cloud (LMC) analog in a cosmological numerical simulation. We conclude that four of these galaxies (Hor1, Car2, Car3, and Hyi1) have come in with the Magellanic Clouds, constituting the first confirmation of the type of satellite infall predicted by LCDM. Ret2, Tuc2, and Gru1 have velocity components that are not consistent within 3σ of our predictions and are therefore less favorable. Hya2 and Dra2 could be associated with the LMC and merit further attention. We rule out Tuc3, Cra2, Tri2, and Aqu2 as potential members. Of the dwarfs without measured PMs, five of them are deemed unlikely on the basis of their positions and distances alone being too far from the orbital plane expected for LMC debris (Eri2, Ind2, Cet2, Cet3, and Vir1). For the remaining sample, we use the simulation to predict PMs and radial velocities, finding that Phx2 has an overdensity of stars in DR2 consistent with this PM prediction.
First Spectroscopic Study of a Young Quasar
Authors: Eilers Anna-Christina , Hennawi Joseph F. , Davies Frederick B.
Published: October 2018

The quasar lifetime t
Q is one of the most fundamental quantities for understanding quasar evolution and the growth of supermassive black holes (SMBHs), but remains uncertain by several orders of magnitude. In a recent study we uncovered a population of very young quasars (t
Q ≲ 104–105 yr), based on the sizes of their proximity zones, which are regions of enhanced Lyα forest transmission near the quasar resulting from its own ionizing radiation. The presence of such young objects poses significant challenges to models of SMBH formation, which already struggle to explain the existence of SMBHs (∼109
M
⊙) at such early cosmic epochs. We conduct the first comprehensive spectroscopic study of the youngest quasar known, SDSS J1335+3533 at z = 5.9012, whose lifetime is t
Q = 103.0±0.8 yr (95% confidence). A careful search of our deep optical and near-infrared spectra for H i and metal absorption lines allows us to convincingly exclude the possibility that its small proximity zone results from an associated absorption system rather than a short lifetime. From the Mg ii  emission line we measure a black hole mass

, implying an Eddington ratio of

—comparable to other co-eval quasars of similar luminosity. The only possible anomaly associated with SDSS J1335+3533's youth are its weak emission lines, but larger samples are needed to shed light on the potential causality. We discuss the implications of short lifetimes for various SMBH growth and formation scenarios, and argue that future observations of young quasars with the James Webb Space Telescope could distinguish between them.
Stripping of the Hot Gas Halos in Member Galaxies of Abell 1795
Authors: Wagner Cory R. , McDonald Michael , Courteau Stéphane
Published: October 2018

The nearby cluster Abell 1795 is used as a testbed to examine whether hot gas in cluster galaxies is stripped by the ram pressure of the intracluster medium (ICM). The expected X-ray emission in and around Abell 1795 galaxies is likely dominated by the ICM, low-mass X-ray binaries, active galactic nuclei, and hot gas halos. In order to constrain these components, we use archival Chandra X-ray Observatory and Sloan Digital Sky Survey observations of Abell 1795 and identify 58 massive (M
⋆ > 1010
M
⊙) spectroscopic cluster members within 5′ of the Chandra optical axis. X-ray images at 0.5–1.5 and 4–8 keV were created for each cluster member and then stacked into two clustercentric radius bins: inner (0.25 < R
clust/R
500 < 1) and outer (1 < R
clust/R
500 < 2.5). Surface brightness profiles of inner and outer cluster members are fit using Markov chain Monte Carlo sampling in order to generate model parameters and measure the 0.5–1.5 keV luminosities of each model component. Leveraging effective total Chandra exposure times of 3.4 and 1.7 Ms for inner and outer cluster members, respectively, we report the detection of hot gas halos, in a statistical sense, around outer cluster members. Outer members have 0.5–1.5 keV hot halo luminosities (

) that are six times larger than the upper limit for inner cluster members (L
X < 1.3 × 1039 erg s−1). This result suggests that the ICM is removing hot gas from the halos of Abell 1795 members as they fall into the cluster.
Wide-field Optical Spectroscopy of Abell 133: A Search for Filaments Reported in X-Ray Observations
Authors: Connor Thomas , Kelson Daniel D. , Mulchaey John , Vikhlinin Alexey , Patel Shannon G. , Balogh Michael L. , Joshi Gandhali , Kraft Ralph , Nagai Daisuke , Starikova Svetlana
Published: October 2018

Filaments of the cosmic web have long been associated with the threadlike structures seen in galaxy redshift surveys. However, despite their baryon content being dominated by hot gas, these filaments have been an elusive target for X-ray observations. Recently, detections of filaments in very deep (2.4 Ms) observations with Chandra were reported around Abell 133 (z = 0.0559). To verify these claims, we conducted a multiobject spectrographic campaign on the Baade 6.5 m telescope around Abell 133; this resulted in a catalog of ∼3000 new redshift measurements, of which 254 are of galaxies near the cluster. We investigate the kinematic state of Abell 133 and identify the physical locations of filamentary structure in the galaxy distribution. Contrary to previous studies, we see no evidence that Abell 133 is dynamically disturbed; we reject the hypothesis that there is a kinematically distinct subgroup (p = 0.28) and find no velocity offset between the central galaxy and the cluster (

). The spatial distribution of galaxies traces the X-ray filaments, as confirmed by angular cross-correlation with a significance of ∼5σ. A similar agreement is found in the angular density distribution, where two X-ray structures have corresponding galaxy enhancements. We also identify filaments in the large-scale structure of galaxies; these filaments approach the cluster from the direction the X-ray structures are seen. While more members between R
200 and 2 × R
200 are required to clarify which large-scale filaments connect to the X-ray gas, we argue that this is compelling evidence that the X-ray emission is indeed associated with cosmic filaments.
Probing Dark Matter Subhalos in Galaxy Clusters Using Highly Magnified Stars
Authors: Dai Liang , Venumadhav Tejaswi , Kaurov Alexander A. , Miralda-Escud Jordi
Published: October 2018

Luminous stars in background galaxies straddling the lensing caustic of a foreground galaxy cluster can be individually detected due to extreme magnification factors of ∼102–103, as recently observed in deep HST images. We propose a direct method to probe the presence of dark matter subhalos in galaxy clusters by measuring the astrometric perturbation they induce on the image positions of magnified stars or bright clumps: lensing by subhalos breaks the symmetry of a smooth critical curve, traced by the midpoints of close image pairs. For the giant arc at z = 0.725 behind the lensing cluster Abell 370 at z = 0.375, a promising target for detecting image pairs of stars, we find that subhalos of masses in the range of 106–108
M
⊙ with the abundance predicted in the cold dark matter theory should typically imprint astrometric distortions at the level of 20–80 mas. We estimate that ∼10 hr integrations with JWST at ∼1–3 μm may uncover several magnified stars whose image doublets will reveal the subhalo-induced structures of the critical curve. This method can probe a dynamic range in the subhalo-to-cluster halo mass ratio of m/M ∼ 10−7–10−9, thereby placing new constraints on the nature of dark matter.
Resolved Kinematics of Runaway and Field OB Stars in the Small Magellanic Cloud
Authors: Oey M. S. , Jones J. Dorigo , Castro N. , Zivick P. , Besla G. , Januszewski H. C. , Moe M. , Kallivayalil N. , Lennon D. J.
Published: October 2018

We use Gaia Data Release 2 proper motions of field OB stars from the Runaways and Isolated O-Type Star Spectroscopic Survey of the Small Magellanic Cloud (SMC) to study the kinematics of runaway stars. The data reveal that the SMC Wing has a systemic peculiar motion relative to the SMC Bar of

and relative radial velocity

. This unambiguously demonstrates that these two regions are kinematically distinct: the Wing is moving away from the Bar, and towards the Large Magellanic Cloud with a 3D velocity of

. This is consistent with models for a recent, direct collision between the Clouds. We present transverse velocity distributions for our field OB stars, confirming that unbound runaways comprise on the order of half our sample, possibly more. Using eclipsing binaries and double-lined spectroscopic binaries as tracers of dynamically ejected runaways, and high-mass X-ray binaries (HMXBs) as tracers of runaways accelerated by supernova kicks, we find significant contributions from both populations. The data suggest that HMXBs have lower velocity dispersion relative to dynamically ejected binaries, consistent with the former group corresponding to less energetic supernova kicks that failed to unbind the components. Evidence suggests that our fast runaways are dominated by dynamical, rather than supernova, ejections.
Apport et richesse de l’échelle de Brazelton dans l’observation des nourrissons nés prématurément
Authors: Durieux Marie-Paule , de Vriendt-Goldman Claire
Published: October 2018

L’examen de Brazelton ou Neonatal Behavioral Assessment Scale pratiqué en présence des parents et centré sur le corps du bébé représente une expérience émotionnelle très forte partagée par les parents, le bébé et l’examinateur ; ces consultations sont l’occasion d’une rencontre vivante et vraie des parents avec leur bébé ; à travers un mouvement d’identification régressive, elles favorisent l’empathie (Vu toute la controverse au niveau du concept d’empathie, ne serait-ce pas plus approprié de parler « d’accordage au bébé et à ses vécus …. » avec le bébé et ses vécus archaïques et une reprise (est-ce une « reprise » du processus ou plutôt « une voie d’accès » au processus) du processus de symbolisation primaire. Elles permettent le dépistage très précoce des signes de souffrance du bébé et une intervention préventive rapide. Elles peuvent déboucher sur l’ouverture d’un espace thérapeutique en particulier avec les parents dont le passé traumatique entraîne des résistances à toute prise en charge « psy ».
Le Newborn Behavioral Observations System (NBO)
Authors: Blanchard Yvette
Published: October 2018

Le Newborn Behavioral Observations System (NBO) est un outil relationnel centré sur la relation nourrisson-famille, et conçu pour sensibiliser les parents aux compétences et à l’individualité de leur nourrisson, afin de favoriser les interactions positives entre eux et leur nourrisson. Il s’agit d’observations aidant le clinicien et le parent ensemble à observer les comportements du nourrisson et à identifier le type de soutien dont le nourrisson a besoin pour son développement. Les études sur le NBO montrent qu’il facilite la relation mère-enfant, peut réduire les symptômes de la dépression maternelle et est applicable dans plusieurs milieux cliniques.
Sédation continue, maintenue jusqu’au décès : un traitement vraiment efficace ?
Authors: Tomczyk Martyna , Viallard Marcel-Louis , Beloucif Sadek
Published: October 2018

La sédation continue, maintenue jusqu’au décès (SCMJD) a pour but de soulager une souffrance ressentie comme insupportable par le patient et réfractaire à tout traitement, par l’abolition totale de vigilance. Le patient sédaté est calme et détendu mais privé de ses moyens d’expression, et ce, jusqu’au décès. Est-ce suffisant pour dire qu’il ne souffre pas ? L’objectif de cette étude était d’explorer les opinions des professionnels de santé à propos de l’efficacité de la SCMJD contre les symptômes réfractaires. Recherche qualitative internationale avec étude de cas multiples fondée sur les données existantes et l’entretien semi-directif individuel. Elle a été réalisée dans deux pays européens : en France et en Pologne. Au total, 13 USP ont été incluses, 197 dossiers médicaux ont été étudiés et 60 entretiens réalisés auprès de médecins et d’infirmières ont été inclus et analysés. La SCMJD était mise en œuvre pour un symptôme dit physique réfractaire, alors qu’en réalité elle était instaurée pour une souffrance morale réfractaire. L’efficacité de ce traitement n’était pas absolue pour tous les professionnels de santé. Le seul critère permettant de juger de l’efficacité ou non de la SCMJD était fondé sur des représentations subjectives des professionnels de santé interrogés et non sur des critères scientifiques objectifs. Les résultats de notre étude montrent que, d’après les professionnels de santé interrogés, il est impossible, à ce jour, d’être certain de l’efficacité de la SCMJD contre la souffrance réfractaire, ou de l’évaluer de façon objective et rigoureuse.
Accompagnement psychologique médiatisé par la poésie pour des femmes ayant subi une mastectomie : présentation d’un cas clinique
Authors: Fakhry Alicia , de Blasi Géraldine , Bouteyre  Évelyne
Published: October 2018

À partir d’une recherche exploratoire qualitative, l’objectif de cet article est d’évaluer les effets de la prise en charge psychologique médiatisée par la poésie chez quatre femmes atteintes d’un cancer du sein. L’analyse qualitative met en évidence les principaux thèmes des poèmes des participantes. L’étude des poésies réalisées par une patiente permet d’illustrer les bénéfices apportés par cette prise en charge. L’usage de la poésie par un psychologue clinicien comme médiation à la parole avec des patientes souffrant de cancer est une modalité de prise en charge thérapeutique originale qui semble adaptée aux besoins de certaines patientes.
Le manager africain face aux nouvelles méthodes de calcul de coûts : cas du Sénégal
Authors: Diop Sérigné
Published: October 2018

L’étude de la réaction des managers africains face aux nouvelles méthodes de contrôle de gestion (comportement d’adoption ou de rejet) revêt une importance capitale. Durant la première décennie des années 2000, des études portant sur les pratiques de gestion des entreprises sénégalaises, ont tenté de mesurer le niveau de diffusion des outils de contrôle de gestion. Cependant, aucune d’elles ne s’est intéressée à la diffusion des nouvelles méthodes de calcul de coûts. La présente enquête par questionnaire auprès de 62 moyennes et grandes entreprises a pour but d’étudier le rythme de diffusion et les raisons qui amènent les managers à rejeter les nouvelles méthodes de calcul de coûts.
La mesure de l’attraction dans les organisations situées en région périphérique : vers un modèle de l’attraction régionale des travailleurs du savoir
Authors: Deschênes Andrée-Anne , Beaudry Catherine , Laflamme Josée , Aguir Mounir
Published: October 2018

Les organisations situées dans les régions périphériques québécoises sont préoccupées par leur capacité à attirer des travailleurs qualifiés. Toutefois, peu d’études s’intéressent aux déterminants de l’attraction régionale. L’objectif de cet article est de développer une mesure de l’attraction régionale et de confirmer sa structure factorielle chez une population de futurs travailleurs du savoir. Un questionnaire a été distribué aux étudiants de huit universités québécoises (n = 876). Une analyse factorielle confirmatoire ainsi qu’une vérification de l’invariance selon le sexe et la région d’origine ont été effectuées. Les résultats de l’analyse factorielle confirmatoire supportent la structure d’un modèle de l’attraction régionale à trois dimensions (S-B X2 = 156,76 ; DL = 33 ; CFI =, 956 ; NNFI =, 941 ; RMSEA =, 065 ; CAIC = -99,83), soit l’environnement économique, la qualité de vie et la culture régionale. L’analyse multigroupe confirme que l’échelle de mesure s’applique uniformément selon le genre et la région d’origine.
Cyberattaque : la gestion du risque est-elle encore possible ?
Authors: Lehu Jean-Marc
Published: October 2018

La cyberattaque représente l’une des crises les plus graves qui menacent les entreprises. Les principes de la gestion de crise sont souvent malmenés en raison de la spécificité cybernétique de l’attaque. L’analyse rétrospective de la cyberattaque singulière subie par Sony Pictures en 2014 permet de tirer plusieurs enseignements, que les entreprises ne parviennent pas toujours à bien intégrer. Au-delà d’un état de l’art croisant sciences de gestion et sciences de la cybernétique, cette étude repose également sur une démarche exploratoire originale qui vise à exploiter le résultat criminel divulgué de cette cyberattaque, soit 306681 documents internes et 173132 courriels, à date, volés et accessibles notamment sur le site Web WikiLeaks. Le but est de mieux comprendre cette cyberattaque, de la confronter aux résultats de la recherche, afin d’envisager les implications managériales sécuritaires qui demeurent (encore) à la portée des entreprises, afin de minimiser le risque.
Motivations et autogestion des apprenants
Authors: Ettien Fidel A.K.
Published: October 2018

Les réseaux sociaux ont acquis une telle notoriété ces dernières années qu’ils focalisent toutes les attentions, tant pour leur aspect ludique que pour leur capacité à soutenir des activités professionnelles de tout genre. Ils sont exploités à la fois comme medias d’information, de création et/ou de diffusion de connaissances, plus particulièrement dans le milieu académique. L’article analyse les motivations des apprenants et l’autogestion de leurs usages des medias sociaux dans un contexte académique. Il s’appuie sur une étude quantitative menée auprès d’un échantillon d’étudiants pour répondre à la question de recherche « Quels facteurs déterminent les motivations intrinsèques de l’apprenant à faire usage des réseaux sociaux dans un contexte académique ? » Les résultats de l’étude confirment les effets positifs à la fois directs et indirects de l’environnement d’apprentissage sur les motivations intrinsèques des apprenants. Ils valident, en conséquence, le modèle théorique proposé pour évaluer les usages des réseaux sociaux, confortant ainsi les perspectives pour l’exploitation pratique de ces réseaux dans un contexte académique.
Entrée et dynamique de coopération entre acteurs de projets automobiles
Authors: Soparnot Richard , Renard Laurent , Khachlouf Nada
Published: October 2018

Les études empiriques ne sont pas légion sur le thème de la coopération entre acteurs membres d’équipes projets. Or, elle est considérée comme un facteur de succès clés de la réussite de ces derniers. Cet article s’intéresse donc à la question de savoir comment s’initialise et se poursuit, ou non, une relation de coopération entre individus dans ce type de situation de gestion. Nous avons pour cela étudié l’entrée et la dynamique de coopération de différents acteurs engagés dans des projets de création ou d’évolution de systèmes d’essais automobiles. Les résultats de cette étude, conduite au sein du département de l’Ingénierie des systèmes d’essais du groupe Renault, démontrent que les représentations des acteurs peuvent être tout autant de puissants freins que des catalyseurs à la mise en œuvre de la coopération, au-delà même de tout contexte favorable à celle-ci. Ils conduisent alors à considérer les représentations comme un des éléments clés de la réussite de la coopération en gestion de projets.
Market Timing et structure de financement des entreprises cotées ?
Authors: Croquet Mélanie , Heldenbergh Anne , Pozniak Laetitia
Published: October 2018

L’objectif de ce papier est de vérifier, à l’instar de M. Baker et J. Wurgler (2002), l’effet du Market Timing sur le niveau d’endettement des grandes entreprises belges cotées sur le NYSE Euronext de la place de Bruxelles. Pour ce faire, deux variables appréhendant cet effet (les valorisations boursières passées pondérées par les déficits de financement et le taux de variation du cours de l’action des sociétés) sont intégrées dans un modèle de régression de type OLS aux côtés de quatre variables de contrôle (la taille, les opportunités de croissance, la tangibilité de l’actif et la rentabilité). Lorsque le modèle est testé sur le niveau d’endettement des entreprises de la base de données introduite en Bourse à partir de 1997, la pertinence et la persistance du Market Timing sont validées endéans une période de 10 années.
Internes, externes ou hybrides : quels facteurs d’adoption des outils de contrôle de gestion sociétal en Espagne ?
Authors: Villesèque-Dubus Fabienne , Amat Oriol , Lafont Anne-Laurence
Published: October 2018

Les études relatives aux outils de contrôle de gestion sociétal en Espagne sont peu développées dans la littérature en contrôle de gestion, et la question sous-jacente des facteurs d’adoption de ces outils reste, quant à elle, peu ou pas explorée. Fort de ce constat, cet article a pour objectif principal d’apporter des éléments de compréhension et de réponse à ces questions. En s’appuyant sur une étude empirique conduite auprès de 420 entreprises en Espagne, cet article souligne que les facteurs d’adoption de ces outils peuvent être à la fois d’origine interne et externe, suivant une approche qualifiée d’« hybride ». Au-delà, la recherche identifie un ensemble de facteurs structurels à même d’expliquer les motivations d’adoption de ces outils.
Le quatrième trimestre : une transition soutenue par le massage
Authors: Dematteis Nicole
Published: October 2018

Le toucher et les massages font partie intégrante des stratégies de proximité, indispensables au continuum sensoriel entre le milieu utérin et le milieu extérieur. Ainsi, ces pratiques soutiennent la transition du « quatrième trimestre de la grossesse ». Le nouveau-né recherche le soutien, la présence, la proximité, en réponse à ses besoins de sécurité, de bien-être et de continuité entre ces deux milieux. Le massage offert par les parents favorise la relation, le plaisir partagé, un apaisement de part et d’autre, l’attachement et la confiance.
Un conjunto de equipo militar romano procedente de Brigantum/Bregenz (austria). evidencia arqueológica sobre un insólito scutum rectangular
Authors: Kopf Julia
Published: October 2018

En 1908 se encontraron diez elementos de equipamiento militar de hierro en Brigantium/Bregenz (Austria). Entre estos figuran los fragmentos de cuatro o cinco umbos de scuta rectangulares. Se trata del conjunto de este tipo de umbos, arqueológicamente insólitos, más grande conocido. Probablemente su buen estado de conservación se debe a que las piezas estaban quemadas y su reciclado resultaba imposible. La datación tipológica de los umbos indica que fueron enterrados durante del cierre de la fortaleza en Brigantium en la época claudiana o poco antes. No está claro en qué contexto estructural fueron recuperados los objetos, porque las condiciones estratigráficas no fueron documentadas e y no se sabe lo suficiente acerca de los edificios militares en el área de la excavación. Debido a su situación dentro de la fortaleza, parece probable que se tratase de un barracón o almacén localizado en la via principalis.
El factor humano en la defensa de Gijón frente al austracismo. 1700-1712
Authors: Martínez-Radío Garrido Evaristo C.
Published: October 2018

Se trata de analizar la respuesta del Ayuntamiento de una importante villa marinera del Cantábrico ante las urgencias de la Guerra de Sucesión, destacando las distintas actitudes de sus elites combinando los ámbitos defensivo, económico y social a través de un estudio exhaustivo de las fuentes primarias. Así se llega a observar distintos comportamientos, propuestas y respuestas oficiales en la relación con el gobierno del Principado y la Corona, según los temores o tranquilidad de la población, en el contexto de lo que fue una molesta carga, tanto en levas como económica, a la que hubo de resignarse.