bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimal Consumer Electronics Product Take-Back Time with Consideration of Consumer Value
Authors: Fang Yi-Tse , Rau Hsin
Published: March 2017

Rapid economic growth in recent years has transformed our lifestyle to massively produce, consume, and dispose of products, especially for consumer electronics. This change has put great threat to our environment and caused natural resource depletion. Moreover, short product life cycles and quick replacements of consumer electronics create enormous electronic wastes (e-wastes). Without proper waste management, immense environmental damage is expected. In this empirical study, we notice that lots of valuable materials that can still be recycled from these used consumer electronics are left unused at home instead of being recycled at the appropriate time, which causes a low collection rate and a decrease in residual value for the used products. Therefore, it is important for the government and the recyclers to handle them efficiently by increasing the used product take-back rate. Our study develops an assessment model for customer value based on the idea of value engineering and the perspective of product life cycle. We also explore the relationship between product value and the total cost of ownership with an evaluation of their time variation, considering different usage modes for various consumer groups and different recycling award schemes (fixed and variable recycling awards). Proper take-back management is likely to create a win-win situation both for consumers and environmental protection. This study regards the notebook computer as an example to determine the optimal time for recycling laptops based on usage patterns and provides consumers a reference for when to replace their used product. The results from our modeling firstly clearly indicate that consumers with higher frequency of usage have shorter take back times and higher maximum consumer value. Secondly, a variable recycling award scheme with higher maximum consumer value is more practical than a fixed recycling award scheme.
Spatiotemporal Dynamics and Spatial Determinants of Urban Growth in Suzhou, China
Authors: Zhang Ling , Wei Yehua , Meng Ran
Published: March 2017

This paper analyzes the spatiotemporal dynamics of urban growth and models its spatial determinants in China through a case study of Suzhou, a rapidly industrializing and globalizing city. We conducted spatial analysis on land use data derived from multi-temporal remote sensing images of Suzhou from 1986 to 2008. Three urban growth types, namely infilling, edge-expansion, and leapfrog, were identified. We used landscape metrics to quantify the temporal trend of urban growth in Suzhou. During these 22 years, Suzhou’s urbanization changed from bottom-up rural urbanization to city-based top-down urban expansion. The underlying mechanism changed from TVE (town village enterprise) driven rural industrialization to FDI (foreign direct investment) driven development zone fever. Furthermore, we employed both global and local logistic regressions to model the probability of urban land conversion against a set of spatial variables. The global logistic regression model found the significance of proximity, neighborhood conditions, and socioeconomic factors. The logistic geographically weighted regression (GWR) model improved the global regression model with better model goodness-of-fit and higher prediction accuracy. More importantly, the local parameter estimates of variables enabled us to exam spatial variations of the influences of variables on urban growth in Suzhou.
Catalogue des Ascomycètes récoltés dans la Loire -2e partie : Leotiomycetes, Orbiliomycetes et affines (discomycètes inoperculés)
Authors: Ayel Antoine , Van Vooren Nicolas
Published: March 2017

Deuxième partie du catalogue des Ascomycètes récoltés dans le département de la Loire, correspondant aux espèces appartenant aux classes Leotiomycetes, Orbiliomycetes et proches, anciennement nommées discomycètes inoperculés.
Le genre Otidea et espèces affines en France
Authors: Mornand Jean , Courtecuisse Régis
Published: March 2017

Les auteurs passent en revue les espèces d 'Otidea décrites dans la littérature européenne et récoltées en France. Quelques éléments de discussion sur les limites du genre sont ajoutés. Le nouveau nom Otidea boudieri est suggéré (provisoirement) pour Otidea felina ss. Boudier.
Révision des espèces ouest-paléarctiques du genre Mediimorda Méquignon, 1 946 et description de deux nouvelles espèces d'Afrique du Nord (Coleoptera Mordellidae)
Authors: Leblanc Pascal
Published: March 2017

Les espèces ouest-paléarctiques du genre Mediimorda Méquignon, 1946 sont révisées. Mediimorda bipunctata var. attalica (Schilsky, 1895) est élevé au rang d'espèce et M. fallaciosa (Stshegoleva-Barovskaja, 1930) est un synonyme junior. Deux nouvelles espèces d'Afrique du Nord sont décrites Mediimorda horaki n. sp. et M. serrahimai n. sp. Des lectotypes sont désignés pom Mediimorda bipunctata (Germar. 1827) et M. bipunctata var. abbreviate i (Schilsky. 1899). Des nouvelles attributions avec désignation de lectotypes sont données pour M bipunctata var. induta (Schilsky. 1895) qui devient M. attalica var. induta (Schilsky . 1895) ; M. bipunctata var. obtecta (Schilsky. 1899) qui devient M attalica x ar. obtecta (Schilsky. 1899) et M. bipunctata var. basicornis (Schilsky, 1899) qui devient M attalica var. basicornis (Schilsky. 1 899). Deux clés d'identification, une pour les mâles et une pour les femelles, sont proposées, suivies du catalogue de l'ensemble des espèces révisées, mentionnant leur distribution.
Mesenchymal Stem Cells: The Magic Cure for Intraventricular Hemorrhage?
Authors: Park Won Soon , Ahn So Yoon , Sung Se In , Ahn Jee-Yin , Chang Yun Sil
Published: March 2017

Severe intraventricular hemorrhage (IVH) remains a major cause of mortality and long-term neurologic morbidities in premature infants, despite recent advances in neonatal intensive care medicine. Several preclinical studies have demonstrated the beneficial effects of mesenchymal stem cell (MSC) transplantation in attenuating brain injuries resulting from severe IVH. Because there currently exists no effective intervention for severe IVH, the therapeutic potential of MSC transplantation in this intractable and devastating disease is creating excitement in this field. This review summarizes recent progress in stem cell research for treating neonatal brain injury due to severe IVH, with a particular focus on preclinical data concerning important issues, such as mechanism of protective action and determining optimal source, route, timing, and dose of MSC transplantation, and on the translation of these preclinical study results to a clinical trial.
Knockdown of FOXK1 Suppresses Proliferation, Migration, and Invasion in Prostate Cancer Cells
Authors: Chen Fang , Xiong Wei , Dou Ke , Ran Qing
Published: March 2017

Forkhead box K1 (FOXK1) is a member of the FOX transcription factor family and plays an important role in the development of several tumors. However, the role of FOXK1 in the progression of prostate cancer remains unknown. Thus, the objectives of this study were to detect the expression
of FOXK1 in prostate cancer and to examine its role in prostate cancer cells. We found that the expression of FOXK1 at both the mRNA and protein levels was significantly upregulated in human prostate cancer cell lines. In addition, the downregulation of FOXK1 obviously inhibited the cell proliferation
of prostate cancer cells in vitro and attenuated tumor growth in a xenograft model in vivo. Furthermore, knockdown of FOXK1 suppressed the migration and invasion of prostate cancer cells, and prevented the EMT phenotype through upregulating the expression of E-cadherin, as well as downregulating
the expression of N-cadherin in prostate cancer cells. Mechanistically, knockdown of FOXK1 efficiently downregulated the expression levels of β-catenin, c-myc, and cyclin D1 in PC-3 cells. Overall, our results demonstrated that knockdown of FOXK1 inhibited the proliferation and metastasis
of prostate cancer, at least in part, through suppressing the Wnt/β-catenin signaling pathway. Therefore, these results suggest that FOXK1 may be a potential therapeutic target for human prostate cancer.
Four Sub-Saturns with Dissimilar Densities: Windows into Planetary Cores and Envelopes
Authors: Petigura Erik A. , Sinukoff Evan , Lopez Eric D. , Crossfield Ian J. M. , Howard Andrew W. , Brewer John M. , Fulton Benjamin J. , Isaacson Howard T. , Ciardi David R. , Howell Steve B. , Everett Mark E. , Horch Elliott P. , Hirsch Lea A. , Weiss Lauren M. , Schlieder Joshua E.
Published: March 2017

We present results from a Keck/HIRES radial velocity campaign to study four sub-Saturn-sized planets, K2-27b, K2-32b, K2-39b, and K2-108b, with the goal of understanding their masses, orbits, and heavy-element enrichment. The planets have similar sizes (

 = 4.5–5.5

), but have dissimilar masses (

 = 16–60

), implying a diversity in their core and envelope masses. K2-32b is the least massive (

) and orbits in close proximity to two sub-Neptunes near a 3:2:1 period commensurability. K2-27b and K2-39b are significantly more massive at

and

, respectively, and show no signs of additional planets. K2-108b is the most massive at

, implying a large reservoir of heavy elements of about ≈50

. Sub-Saturns as a population have a large diversity in planet mass at a given size. They exhibit remarkably little correlation between mass and size; sub-Saturns range from ≈6–60

, regardless of size. We find a strong correlation between planet mass and host star metallicity, suggesting that metal-rich disks form more massive planet cores. The most massive sub-Saturns tend to lack detected companions and have moderately eccentric orbits, perhaps as a result of a previous epoch of dynamical instability. Finally, we observe only a weak correlation between the planet envelope fraction and present-day equilibrium temperature, suggesting that photo-evaporation does not play a dominant role in determining the amount of gas sub-Saturns accrete from their protoplanetary disks.
Split Active Asteroid P/2016 J1 (PANSTARRS)
Authors: Hui (許文韜) Man-To , Jewitt David , Du (杜辛楠) Xinnan
Published: March 2017

We present a photometric and astrometric study of the split active asteroid P/2016 J1 (PANSTARRS). The two components (hereafter J1-A and J1-B) separated either ∼1500 days (2012 May to June) or 2300 days (2010 April) prior to the current epoch, with a separation speed V
sep = 0.70 ± 0.02 m s−1 for the former scenario and 0.83 ± 0.06 m s−1 for the latter. Keck photometry reveals that the two fragments have similar, Sun-like colors that are comparable to the colors of primitive C- and G-type asteroids. With a nominal comet-like albedo, p

R
 = 0.04, the effective, dust-contaminated cross sections are estimated to be 2.4 km2 for J1-A and 0.5 km2 for J1-B. We estimate that the nucleus radii lie in the range 140 ≲ R
N ≲ 900 m for J1-A and 40 ≲ R
N ≲ 400 m for J1-B. A syndyne–synchrone simulation shows that both components have been active for 3–6 months, by ejecting dust grains at speeds ∼0.5 m s−1 with rates ∼1 kg s−1 for J1-A and 0.1 kg s−1 for J1-B. In its present orbit, the rotational spin-up and devolatilization times of 2016 J1 are very small compared to the age of the solar system, raising the question of why this object still exists. We suggest that ice that was formerly buried within this asteroid became exposed at the surface, perhaps via a small impact, and that sublimation torques then rapidly drove it to breakup. Further disintegration events are anticipated owing to the rotational instability.
The Frontier Fields: Survey Design and Initial Results
Authors: Lotz J. M. , Koekemoer A. , Coe D. , Grogin N. , Capak P. , Mack J. , Anderson J. , Avila R. , Barker E. A. , Borncamp D. , Brammer G. , Durbin M. , Gunning H. , Hilbert B. , Jenkner H. , Khandrika H. , Levay Z. , Lucas R. A. , MacKenty J. , Ogaz S. , Porterfield B. , Reid N. , Robberto M. , Royle P. , Smith L. J. , Storrie-Lombardi L. J. , Sunnquist B. , Surace J. , Taylor D. C. , Williams R. , Bullock J. , Dickinson M. , Finkelstein S. , Natarajan P. , Richard J. , Robertson B. , Tumlinson J. , Zitrin A. , Flanagan K. , Sembach K. , Soifer B. T. , Mountain M.
Published: March 2017

What are the faintest distant galaxies we can see with the Hubble Space Telescope (HST) now, before the launch of the James Webb Space Telescope? This is the challenge taken up by the Frontier Fields, a Director’s discretionary time campaign with HST and the Spitzer Space Telescope to see deeper into the universe than ever before. The Frontier Fields combines the power of HST and Spitzer with the natural gravitational telescopes of massive high-magnification clusters of galaxies to produce the deepest observations of clusters and their lensed galaxies ever obtained. Six clusters—Abell 2744, MACSJ0416.1-2403, MACSJ0717.5+3745, MACSJ1149.5+2223, Abell S1063, and Abell 370—have been targeted by the HST ACS/WFC and WFC3/IR cameras with coordinated parallel fields for over 840 HST orbits. The parallel fields are the second-deepest observations thus far by HST with 5σ point-source depths of ∼29th ABmag. Galaxies behind the clusters experience typical magnification factors of a few, with small regions magnified by factors of 10–100. Therefore, the Frontier Field cluster HST images achieve intrinsic depths of ∼30–33 mag over very small volumes. Spitzer has obtained over 1000 hr of Director’s discretionary imaging of the Frontier Field cluster and parallels in IRAC 3.6 and 4.5 μm bands to 5σ point-source depths of ∼26.5, 26.0 ABmag. We demonstrate the exceptional sensitivity of the HST Frontier Field images to faint high-redshift galaxies, and review the initial results related to the primary science goals.
The Rotation–activity Correlations in K and M Dwarfs. II. New Constraints on the Dynamo Mechanisms in Late-K and M Dwarfs before and at the Transition to Complete Convection∗
Authors: Houdebine E. R. , Mullan D. J. , Bercu B. , Paletou F. , Gebran M.
Published: March 2017

We study the rotation–activity correlations (RACs) in a sample of stars from spectral type dK4 to dM4. We study RACs using chromospheric data and coronal data. We study the Ca ii line surface fluxes-

RACs. We fit the RACs with linear homoscedastic and heteroscedastic regression models. We find that these RACs differ substantially from one spectral sub-type to another. For dM3 and dM4 stars, we find that the RACs cannot be described by a simple model, but instead that there may exist two distinct RAC behaviors for the low-activity and the high-activity stellar sub-samples, respectively. Although these results are preliminary and will need confirmation, the data suggest that these distinct RACs may be associated with different dynamo regimes. We also study

as a function of the Rossby number R
0. We find (i) for dK4 stars,

as a function of R
0 agrees well with previous results for F-G-K stars and (ii) in dK6, dM2, dM3, and dM4 stars, at a given R
0, the values of

lie at a factor of 3, 10, 20, and 90, respectively, below the F-G-K RAC. Our results suggest a significant decrease in the efficiency of the dynamo mechanism(s) as regards chromospheric heating before and at dM3, i.e., before and at the transition to complete convection. We also show that the ratio of coronal heating to chromospheric heating L
X/L
HK increases by a factor of 100 between dK4 and dM4 stars.
A Search for L/T Transition Dwarfs with Pan-STARRS1 and WISE. III. Young L Dwarf Discoveries and Proper Motion Catalogs in Taurus and Scorpius–Centaurus
Authors: Best William M. J. , Liu Michael C. , Magnier Eugene A. , Bowler Brendan P. , Aller Kimberly M. , Zhang Zhoujian , Kotson Michael C. , Burgett W. S. , Chambers K. C. , Draper P. W. , Flewelling H. , Hodapp K. W. , Kaiser N. , Metcalfe N. , Wainscoat R. J. , Waters C.
Published: March 2017

We present the discovery of eight young M7–L2 dwarfs in the Taurus star-forming region and the Scorpius–Centaurus OB Association, serendipitously found during a wide-field search for L/T transition dwarfs using Pan-STARRS1 (optical) and WISE (mid-infrared) photometry. We identify PSO J060.3200+25.9644 (near-infrared spectral type L1) and PSO J077.1033+24.3809 (L2) as new members of Taurus based on their vl-g gravity classifications, the consistency of their photometry and proper motions with previously known Taurus objects, and the low probability of contamination by field objects. PSO J077.1033+24.3809 is the coolest substellar member of Taurus found to date. Both Taurus objects are among the lowest-mass free-floating objects ever discovered, with estimated masses ≈6 

, and provide further evidence that isolated planetary-mass objects can form as part of normal star formation processes. PSO J060.3200+25.9644 (a.k.a. DANCe J040116.80+255752.2) was previously identified as a likely member of the Pleiades (age

) based on photometry and astrometry, but its vl-g gravity classification and near-infrared photometry imply a much younger age and thus point to Taurus membership. We have also discovered six M7–L1 dwarfs in outlying regions of Scorpius–Centaurus with photometry, proper motions, and low-gravity spectral signatures consistent with membership. These objects have estimated masses ≈15–36 

. The M7 dwarf, PSO J237.1470−23.1489, shows excess mid-infrared flux implying the presence of a circumstellar disk. Finally, we present catalogs of Pan-STARRS1 proper motions for low-mass members of Taurus and Upper Scorpius with median precisions of ≈3 mas yr−1, including 67 objects with no previous proper motion and 359 measurements that improve on literature values.
Tidal Distortion of the Envelope of an AGB Star IRS 3 near Sgr A*
Authors: Yusef-Zadeh F. , Wardle M. , Cotton W. , Schödel R. , Royster M. J. , Roberts D. A. , Kunneriath D.
Published: March 2017

We present radio and millimeter continuum observations of the Galactic center taken with the Very Large Array (VLA) and ALMA at 44 and 226 GHz, respectively. We detect radio and millimeter emission from IRS 3, lying ∼4.″5 NW of Sgr A*, with a spectrum that is consistent with the photospheric emission from an AGB star at the Galactic center. Millimeter images reveal that the envelope of IRS 3, the brightest and most extended 3.8 μm Galactic center stellar source, consists of two semicircular dust shells facing the direction of Sgr A*. The outer circumstellar shell, at a distance of 1.6 × 104 au, appears to break up into “fingers” of dust directed toward Sgr A*. These features coincide with molecular CS (5–4) emission and a near-IR extinction cloud distributed between IRS 3 and Sgr A*. The NE–SW asymmetric shapes of the IRS 3 shells seen at 3.8 μm and radio are interpreted as structures that are tidally distorted by Sgr A*. Using the kinematics of CS emission and the proper motion of IRS 3, the tidally distorted outflowing material from the envelope after 5000 yr constrains the distance of IRS 3 to ∼0.7 pc in front of or ∼0.5 pc behind Sgr A*. This suggests that the mass loss by stars near Sgr A* can supply a reservoir of molecular material near Sgr A*. We also present dark features in radio continuum images coincident with the envelope of IRS 3. These dusty stars provide examples in which high-resolution radio continuum images can identify dust-enshrouded stellar sources embedded in an ionized medium.
Updated 34-band Photometry for the SINGS/KINGFISH Samples of Nearby Galaxies
Authors: Dale D. A. , Cook D. O. , Roussel H. , Turner J. A. , Armus L. , Bolatto A. D. , Boquien M. , Brown M. J. I. , Calzetti D. , Looze I. De , Galametz M. , Gordon K. D. , Groves B. A. , Jarrett T. H. , Helou G. , Herrera-Camus R. , Hinz J. L. , Hunt L. K. , Kennicutt R. C. , Murphy E. J. , Rest A. , Sandstrom K. M. , Smith J.-D. T. , Tabatabaei F. S. , Wilson C. D.
Published: March 2017

We present an update to the ultraviolet-to-radio database of global broadband photometry for the 79 nearby galaxies that comprise the union of the KINGFISH (Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel) and SINGS (Spitzer Infrared Nearby Galaxies Survey) samples. The 34-band data set presented here includes contributions from observational work carried out with a variety of facilities including GALEX, SDSS, Pan-STARRS1, NOAO, 2MASS, Wide-Field Infrared Survey Explorer, Spitzer, Herschel, Planck, JCMT, and the VLA. Improvements of note include recalibrations of previously published SINGS BVR
C
I
C and KINGFISH far-infrared/submillimeter photometry. Similar to previous results in the literature, an excess of submillimeter emission above model predictions is seen primarily for low-metallicity dwarf or irregular galaxies. This 33-band photometric data set for the combined KINGFISH+SINGS sample serves as an important multiwavelength reference for the variety of galaxies observed at low redshift. A thorough analysis of the observed spectral energy distributions is carried out in a companion paper.
Velocity Segregation and Systematic Biases in Velocity Dispersion Estimates with the SPT-GMOS Spectroscopic Survey
Authors: Bayliss Matthew. B. , Zengo Kyle , Ruel Jonathan , Benson Bradford A. , Bleem Lindsey E. , Bocquet Sebastian , Bulbul Esra , Brodwin Mark , Capasso Raffaella , Chiu I-non , McDonald Michael , Rapetti David , Saro Alex , Stalder Brian , Stark Antony A. , Strazzullo Veronica , Stubbs Christopher W. , Zenteno Alfredo
Published: March 2017

The velocity distribution of galaxies in clusters is not universal; rather, galaxies are segregated according to their spectral type and relative luminosity. We examine the velocity distributions of different populations of galaxies within 89 Sunyaev Zel’dovich (SZ) selected galaxy clusters spanning

. Our sample is primarily draw from the SPT-GMOS spectroscopic survey, supplemented by additional published spectroscopy, resulting in a final spectroscopic sample of 4148 galaxy spectra—2868 cluster members. The velocity dispersion of star-forming cluster galaxies is 17 ± 4% greater than that of passive cluster galaxies, and the velocity dispersion of bright (

) cluster galaxies is 11 ± 4% lower than the velocity dispersion of our total member population. We find good agreement with simulations regarding the shape of the relationship between the measured velocity dispersion and the fraction of passive versus star-forming galaxies used to measure it, but we find a small offset between this relationship as measured in data and simulations, which suggests that our dispersions are systematically low by as much as 3% relative to simulations. We argue that this offset could be interpreted as a measurement of the effective velocity bias that describes the ratio of our observed velocity dispersions and the intrinsic velocity dispersion of dark matter particles in a published simulation result. Measuring velocity bias in this way suggests that large spectroscopic surveys can improve dispersion-based mass-observable scaling relations for cosmology even in the face of velocity biases, by quantifying and ultimately calibrating them out.
Shining Light on Quantum Gravity with Pulsar–Black hole Binaries
Authors: Estes John , Kavic Michael , Lippert Matthew , Simonetti John H.
Published: March 2017

Pulsars are some of the most accurate clocks found in nature, while black holes offer a unique arena for the study of quantum gravity. As such, pulsar–black hole (PSR–BH) binaries provide ideal astrophysical systems for detecting the effects of quantum gravity. With the success of aLIGO and the advent of instruments like SKA and eLISA, the prospects for the discovery of such PSR–BH binaries are very promising. We argue that PSR–BH binaries can serve as ready-made testing grounds for proposed resolutions to the black hole information paradox. We propose using timing signals from a pulsar beam passing through the region near a black hole event horizon as a probe of quantum gravitational effects. In particular, we demonstrate that fluctuations of the geometry outside a black hole lead to an increase in the measured root mean square deviation of the arrival times of pulsar pulses traveling near the horizon. This allows for a clear observational test of the nonviolent nonlocality proposal for black hole information escape. For a series of pulses traversing the near-horizon region, this model predicts an rms in pulse arrival times of

for a

black hole,

for a

black hole, and

for Sgr A*. The current precision of pulse time-of-arrival measurements is sufficient to discern these rms fluctuations. This work is intended to motivate observational searches for PSR–BH systems as a means of testing models of quantum gravity.
Very High Excitation Lines of H2 in the Orion Molecular Cloud Outflow
Authors: Geballe T. R. , Burton M. G. , Pike R. E.
Published: March 2017

Vibration–rotation lines of H2 from highly excited levels approaching the dissociation limit have been detected at a number of locations in the shocked gas of the Orion Molecular Cloud (OMC-1), including in a Herbig–Haro object near the tip of one of the OMC-1 “fingers.” Population diagrams show that, while the excited H2 is almost entirely at a kinetic temperature of ∼1800 K (typical for vibrationally shock-excited H2), as in the previously reported case of Herbig–Haro object HH 7 up to a few percent of the H2 is at a kinetic temperature of ∼5000 K. The location with the largest fraction of hot H2 is the Herbig–Haro object, where the outflowing material is moving at a higher speed than at the other locations. Although theoretical work is required for a better understanding of the 5000 K H2 (including how it cools), its existence and the apparent dependence of its abundance relative to that of the cooler component on the relative velocities of the outflow and the surrounding ambient gas appear broadly consistent with it having recently reformed. The existence of this high-temperature H2 appears to be a common characteristic of shock-excited molecular gas.
De l’anti-France au Tiers Monde
Authors: Dedieu Jean-Philippe
Published: March 2017

(À propos de : Anti-Imperial Metropolis. Interwar Paris and the Seeds of Third World Nationalism , Michael Goebel, Cambridge University Press, 2015)
L’évidement idéologique du Parti socialiste
Authors: Cos Rafaël
Published: March 2017

Le sombre bilan du quinquennat de François Hollande ne peut être imputé au seul contexte économique international. Il résulte aussi des recompositions idéologiques du Parti Socialiste depuis la fin de l’ère mitterrandienne et du désinvestissement du travail programmatique par ses responsables. L’absence de corpus doctrinal original, la dépendance croissante aux schémas de l’adversaire et l’intrication croissante des élites partisanes avec le champ du pouvoir économique constituent autant de facteurs qui ont abouti à vider le mot « socialisme » de tout contenu identifiable.
« Le travail, cet impensé de la gauche »
Authors: Jami Irène , Achin Catherine
Published: March 2017

Danièle Linhart est sociologue, directrice de recherche émérite au CNRS (équipe Genre, Travail et Mobilités du CRESPPA). Elle mène depuis la fin des années 1970 des recherches sur le travail et l’emploi, s’intéressant notamment aux modalités et aux effets de la modernisation des entreprises et des stratégies managériales, et plus largement au rapport des individus au travail et à la place du travail dans la société. Nous avons souhaité la rencontrer pour évoquer son parcours et son point de vue sur l’évolution du travail, en l’interrogeant en particulier sur le rôle des forces politiques de gauche (partis et syndicats) dans ce processus.
Tiempo y desigualdad en las dinámicas laborales y familiares
Authors: Cano Tomás
Published: March 2017

Los cambios sociales experimentados en las últimas décadas han modificado los usos del tiempo de los individuos. Sin embargo, cómo se emplea el tiempo viene condicionado por la posición que se ocupa en la estructura social. Este trabajo argumenta que la desigualdad entre los distintos estatus socioeconómicos en el poder sobre el uso del tiempo está aumentando. Mientras tanto, las políticas sociales fallan en su potencial igualador. Para ello este ensayo sintetiza críticamente tres libros de reciente publicación centrados en los casos americano, francés y español. Tres elementos que forman la organización social del tiempo son discutidos: (a) la dependencia en el control sobre el tiempo entre grupos sociales y la endogeneidad entre el tiempo familiar y laboral; (b) la ambivalencia de la flexibilidad en función de su vinculación con el género y el estatus socioeconómico; y (c) la necesidad de una reevaluación de las políticas sociales destinadas a proteger el tiempo familiar de los trabajadores.
The Response of a SDOF System Driven by a Periodic Random Force
Authors: Sana Vladimír , Rokos Ondrej , Maca Jiří
Published: March 2017

This work deals with the response of a linear undamped SDOF system exposed to a force with random amplitude, phase shift, or their combination. The first two moments, the mean value and the variance, of the response will be determined analytically through the Duhamel's integral, and compared to the numerical Monte Carlo simulations. Integration of associated equations of motion will be performed by the Newmark method of average acceleration.
Adaptive Boundaries of Wang Tiles for Heterogeneous Material Modelling
Authors: Šedlbauer David
Published: March 2017

This contribution deals with algorithms for the generation of modified Wang tiles as a tool for the heterogeneous materials modelling. The proposed approach considers material domains only with 2D hard discs of both equal and different radii distributed within a matrix. Previous works showed potential of the Wang tile principles for reconstruction of heterogeneous materials. The main advantage of the tiling theory for material modelling is to stack large/infinite areas with relative small set of tiles with emphasis on a periodicity reduction in comparison with the traditional Periodic Unit Cell (PUC) concept. The basic units of the Wang Tiling are tiles with codes (colors) on edges. The algorithm for distribution of hard discs is based on the molecular dynamics to avoid particles overlapping. Unfortunately the nature of the Wang tiling together with molecular dynamics algorithms cause periodicity artefacts especially in tile corners of a composed material domain. In this paper a new algorithm with adaptive tile boundaries is presented in order to avoid edge and corner periodicity.
Mechanical Properties of the Cement Paste with Fine Ground Recycled Concrete Depending on the Microstructure
Authors: Hrůza Jaromír , Topič Jaroslav , Prošek Zdeněk
Published: March 2017

This article deals with the usage of recycled concrete, which arises from the demolition of concrete structures. The work is focused on the development of mechanical properties (Young's modulus) depending on the microstructure of composite cement based materials with different percentage of fine ground recycled concrete as a partial substitute of the filler in the cement mixture, which under certain circumstances also functions as a binder component. To assess of the microstructure there were used images from the optical and scanning electron microscopy. There were used four mixtures of the cement pastes containing 0, 33, 50 and 67 wt. % of finely ground recycled concrete. Development of Young's modulus was measured by nondestructive method. The results showed that of the captured images of surfaces of individual mixtures with increasing amounts of fine ground recycled concrete is seen an increasing amount of pores, which results in a loss of cohesion of the cement matrix and decrease of the Young's modulus.
Reinforced Masonry Column’s Analysis: The Influence of Rounded Corners
Authors: Maroušková Aneta
Published: March 2017

Numerical analysis of masonry structures is a complex task requiring deep knowledges about the problematics. This paper deals with concentrically compressed brick masonry column reinforced by fiber reinforced polymer (FRP) wrapping. The experimental research across the world has proved that FRP external sheets are an efficient tool for stabilization or strengthening of masonry structures. A combination of several types of column’s failure were observed during the experimental testing – failure in masonry, rupture of FRP sheet or failure at interface between reinforcement and masonry support. The rupture of sheet occurs close to sharp corners under the assumption of sheets’ perfect overlap. The rounded corners result in an enlargement of the FRP-masonry contact and reduction of the stress concentration. The increasing of an effective area causes a greater influence of FRP wrapping. For all 3D simulations the commercial software package ABAQUS was used and the obtained results are discussed.
Utilization of Plasma Treated Polymeric Macro-Fibers as Reinforcement in Concrete Constructions
Authors: Trejbal Jan , Fladr Josef , Kopecký Lubomír
Published: March 2017

Polymeric macro fibers BeneSteel having diameter equal to 480 μm and length 55 mm were treated in low pressure oxygen plasma by different treatment duration from 5 to 480 s to attain the better interaction with cement matrix (focused on both, chemical and physical bond). An effect of realized treatment was examined through fiber surface water wettability observation by direct horizontal optical method enabling contact angle measurements. Next, the pertinent negative impact of plasma treatment on fibers mechanical properties was examined by several methods. It was shown that the most effective plasma treatment duration is up to 30 s. Thus treated fibers exhibited the better wettability by ca. 110 % in comparison with reference fibers, while its mechanical properties were not negatively affected. Finally, reference and 30 s plasma treated fibers were used as randomly dispersed reinforcement in concrete specimens. Mechanical properties of these composites were examined by four-point bending tests. Specimens containing treated fibers exhibited bigger fracture toughness by ca. 30 % beside the reference ones, while the first cracking strength stayed constant in all cases.
Durability of Concrete with Fly Ash from the Dam Orlík after 55 Years
Authors: Zobal Ondřej , Reiterman Pavel , Plachy Tomáš , Bittnar Zdeněk
Published: March 2017

The paper focuses on some properties of concrete with fly ash after 55 years in operation. Among other things this topic refers to still current issue of sustainable development. In this case, it is saving of cement by using of substitution of fly ash. Another researched topic in the paper is the durability of structures and building materials. For obtaining important data, samples of concrete were extracted from the body of the dam Orlík, which has been in operation since 1961 and fly ash was used in a mixture. The results of the measurement of carbonation and frost resistance of concrete with fly ash addition are presented and analyzed in this paper.
Microfiber Angle and its Effect on Wood Cell Behavior
Authors: Hlavata Vera , Kuklík Pavel , Celler Jiří , Vanerek Jan
Published: March 2017

The article continues the previous one “Coefficients of Transverse Contraction of the Wood Cell Constituents and their Effect on the Cell Behavior”. Wood, as being one of the most commonly used building materials, disposes of complex structure and basic building unit of a wood-cell. Each individual cell is composed of four distinct cell wall layers - the Primary, S1, S2, and S3. This work focuses on a closer examination of the relationship between microscopic and mechanical properties of wood. The main task was an effect of micro fibril angle (MFA) in the S2 layer of a wood on the cell wall parameters. This layer occupies more than 80% of the total thickness of the cell wall and thus has the greatest influence on the mechanical properties of wood cells. MFA values as well as values of bulk density has a strong dependence on the modulus of, elasticity in the longitudinal direction, as well as on the values of shrinkage. We tried to describe the dependence of the longitudinal modulus of elasticity on its. The proposed formula was partially validated using nanoindentation experiments performed in Norway spruce cell walls with highly variable cellulose microfibril angle and lignin content [5].
Mechanical Properties of Cement Composite with Material Based on Waste Marble Powder and Crushed Limestone
Authors: Hlubocký Lukáš , Prošek Zdeněk
Published: March 2017

This paper deals with the use of waste materials from processing of stone in the construction industry. The tested mixtures consisted of Portland cement CEM I 42.5 R, micronized waste marble powder and crushed waste limestone. The article examines the effect of varying the amount of waste on the mechanical properties of the cement composite. At first, samples were tested non-destructively for determine the dynamic modulus of elasticity and then were tested destructively for determine tensile bending and compressive strength.
Finite Element Analysis of the Influence of Ambient Temperature Variations on the Performance of Fiber Optic Gyroscope Sensing Coils
Authors: Ramadass Gidugu Ananda , Vedachalam Narayanaswamy , Umapathy Arunachalam , Ramesh Raju , Balanagajyothi Vandavasi
Published: March 2017

AbstractTime transience-related nonreciprocal effect due to ambient temperature variations has significant influence in the bias stability performance of interference-type fiber optic gyroscopes (I-FOG). This paper presents the thermal finite element analysis (FEA) done on
a 10-km-long I-FOG sensing coil wound with a diameter of 10 cm in a bipolar configuration for identifying its bias performance during ambient temperature variations. Results indicate that, with a sampling frequency of 0.5 kHz, the ambient temperature variation of 0.5°/min could degrade
the bias stability performance of the I-FOG to tactical grade level, while maintaining ambient temperature variation within 0.01°/min is required to attain bias stabilities >0.001°/h, the performance required for the strategic grade applications. It is also identified that in a
temperature stabilized environment, sensing coil with 10 and 40 layers requires a thermal stabilization time of about 9 and 26 min, respectively.
Passive Acoustic Observations in the Shallow Waters of Northwest Bay of Bengal to Study the Effects of Impact Pile Driving on Fish Chorus
Authors: Mohan Mahanty Madan , Latha G. , Sanjana M. C. , Thirunavukarasu A.
Published: March 2017

AbstractAmbient noise time series measurements were recorded in the shallow water of Northwest Bay of Bengal. A few data sets revealed the presence of impact pile-driving noise. The site is also known for the presence of the speciesTerapon theraps(Family:Terapontidae), and the fish chorus was recorded during the measurement period. Sound metrics of impact pile-driving noise were calculated to assess their potential impacts on fish chorus. Averaged peak sound pressure level reached 162 dB re 1 μPa, and single-strike sound exposure level is about 134 dB re 1 μPa2s, leading to a cumulative sound exposure level of approximately 148 dB re 1 μPa2s. The impact pile-driving signal has the highest energy in lower frequency band over 0.05‐1 kHz. It is observed thatT. therapsfish chorus also displays their pulse repetition rate and swimbladder spectral peaks at lower frequencies. Detailed analysis of the entire data sets indicates that the fishes were exposed to the pile-driving noise, which would have an impact on the chorus made by them.
Cooperation of Gastric Mononuclear Phagocytes with Helicobacter pylori during Colonization
Authors: Viladomiu Monica , Bassaganya-Riera Josep , Tubau-Juni Nuria , Kronsteiner Barbara , Leber Andrew , Philipson Casandra W. , Zoccoli-Rodriguez Victoria , Hontecillas Raquel
Published: March 2017

Helicobacter pylori, the dominant member of the human gastric microbiota, elicits immunoregulatory responses implicated in protective versus pathological outcomes. To evaluate the role of macrophages during infection, we employed a system with a shifted proinflammatory macrophage phenotype by deleting PPARγ in myeloid cells and found a 5- to 10-fold decrease in gastric bacterial loads. Higher levels of colonization in wild-type mice were associated with increased presence of mononuclear phagocytes and in particular with the accumulation of CD11b+F4/80hiCD64+CX3CR1+ macrophages in the gastric lamina propria. Depletion of phagocytic cells by clodronate liposomes in wild-type mice resulted in a reduction of gastric H. pylori colonization compared with nontreated mice. PPARγ-deficient and macrophage-depleted mice presented decreased IL-10–mediated myeloid and T cell regulatory responses soon after infection. IL-10 neutralization during H. pylori infection led to increased IL-17–mediated responses and increased neutrophil accumulation at the gastric mucosa. In conclusion, we report the induction of IL-10–driven regulatory responses mediated by CD11b+F4/80hiCD64+CX3CR1+ mononuclear phagocytes that contribute to maintaining high levels of H. pylori loads in the stomach by modulating effector T cell responses at the gastric mucosa.
Gastropleural Fistula with Aortic Intramural Involvement
Authors: Gupta Akshya , Chaturvedi Abhishek , Fultz Patrick , Hobbs Susan
Published: March 2017

Gastropleural fistula is a relatively rare complication that can be seen as a result of traumatic, nontraumatic, benign, and neoplastic etiologies. Most commonly, these are found in patients with diaphragmatic herniation or prior thoracic surgery. Aortoenteric fistulas are rare communications typically between the abdominal aorta and bowel. We present a rare case of an 88-year-old male who developed a gastropleural fistula with erosions into the wall of the descending thoracic aorta. Computed tomography (CT) is a leading modality in evaluation of suspected gastropleural or aortoenteric fistulas given the quick scan time and widespread availability. Prompt diagnosis is essential and requires an understanding of appropriate CT protocols and CT imaging appearance.
Dysfunctional Consequences of Conflict on Teachers’ Productivity: A Theoretical Insight
Authors: Alimba N. Chinyere
Published: March 2017

Conflicts have become more prevalent in the educational system than any other social organisation on earth. Despite this, conflicts occurring in schools are the least discussed events in social conflict discourses, making this research necessary for a better understanding of the behaviour of violent conflict in the educational system. The point is that when conflict is misperceived and mismanaged, it will exert unimaginable force which will produce adverse effect on students, teaching and non-teaching staff, the system and the society in general. However, conflict outcomes depend on the nature, ferocity of conflict, and approaches adopted for mitigation. Thus, this study described the dysfunctional consequences of conflict on teachers’ productivity. To achieve the objectives of the study, discussions were woven around six thematic areas which include: the conceptualization of conflict, the issue of teachers’ productivity, the factors influencing teachers’ productivity, the dynamics of dysfunctional conflict, exploration of the effects of violent conflict on education and finally, the issues of dysfunctional conflict and teachers’ productivity.
The Origin and Development of the Guild of Bronze Casters of Benin Kingdom up to 1914
Authors: Odiahi Ese Vivian
Published: March 2017

The Benin Kingdom is one of the forest kingdoms located in West Africa which became famous for its arts, especially its art of bronze casting. The art of bronze casting flourished under the guild system established by Oba Oguola in 1280AD. The guild of bronze casters was the most important guild that existed in the kingdom partly because of its function of preserving the history of the kingdom in bronze for posterity sake. A role it continued to play until the late 19th century when Benin kingdom was invaded. The outcome of the invasion was the fizzling out of the guild system. The guild system was however reinstated in 1914, but only the guild of bronze casters was able to re-organise themselves well and remain however not without some changes and developments. This paper investigated the guild of bronze casters of Benin kingdom, an area that has not been given proper attention. It discussed the guild from its inception in the thirteenth century to the changes and developments that took in the guild up to the twentieth century.Key words: Bronze casters, Brass, Invasion of Benin kingdom
Problems in Locke’s Theory of Knowledge
Authors: Minimah Francis Israel
Published: March 2017

As a solution to the epistemological problem of inquiring into what the human mind is capable of knowing, John Locke, founder of British empiricism rejects the rationalist assumption that the human mind does have a privileged access to reality. He is especially critical of the Cartesian notion of innate ideas as an explanation of how knowledge is acquired. Locke insists that the senses are the final arbiter of truth. He believes that as our mental powers develop from childhood; we tend to learn things about external objects primarily through our interactions with the world and in adult age puzzle over the meaning, reliability and limits of our acquired knowledge and beliefs. His notable theses include the concepts of sensation and reflection, simple and complex ideas, primary and secondary qualities, substance and the degrees of knowledge. Given this background, this paper, from two spectra, attempted a rigorous exposition of the major issues in Locke’s theory of knowledge. By showing the essential details of his position and arguments on these issues, the author raised several possible objections or problems as well as critical assessment of some of his reasoning and conclusions. One important contribution of this work is that Locke, far from being an empiricist deviated and turned towards the rationalistic philosophy that he sets out to criticized - a view that would inevitably be dissatisfying to those who are drawn to Locke’s theory of perception as a reaction to the traditional conception of reason; the faculty that governs the whole of one’s cognitive life in the pursuit of truth.
Evaluation of anti-hyperglycemic and anti-hyperlipidemic effects of Naravelia zeylanica in streptozotocin- induced diabetic rats
Authors: A Rajakalanithi , P Swasthika , S Sujatha
Published: March 2017

Naravelia zeylanica DC (Ranunculaceae), a woody climber, have been used from ancient times to treat various ailments like rheumatoid arthritis, skin diseases, wound and ulcer. The present study was designed to investigate the anti-hyperglycemic activity of methanolic extract of Naravelia zeylanica (NZYM) using experimental diabetic model. Diabetes was induced in wistar rats by a single dose of streptozotocin (55 mg/kg i.p.) (STZ) and treated with NZYM at doses of 100 and 200 mg/kg for 45 days. Glibenclamide (5 mg/kg b.w.) was used as standard drug. Blood glucose and body weight were monitored at regular intervals and the levels of serum insulin, lipid and the carbohydrate metabolic enzyme in the liver were measured at the end of the study. Oral administration of NZYM and glibenclamide significantly reduced the blood glucose level (p<0.05), with increased serum insulin and significant alteration in lipid profiles and liver carbohydrate enzymes (p<0.05) after 45 days. Furthermore, the biochemical parameters correlated with the histopathological changes in the pancreas of STZ-induced diabetic rats, which structurally proved the efficacy of NZYM. The findings suggest that NZYM possess anti-hyperglycemic activity and anti-hyperlipidemic properties and restored STZ-induced pancreatic damage in diabetic rats. NZYM might therefore have a beneficial effect in treatment of diabetes mediated through regulation of carbohydrate metabolic enzyme activities. 
Tephrosia purpurea: A natural herb/ bliss
Authors: Bhardwaj Richa , Shrivastava Shilpa
Published: March 2017

Herbal medicine is in demand due to its fewer side effects and more or better curable techniques. The Tephrosia purpurea, claimed to be healing, curing and lower the various diseases according to Indian medicinal history. This genera species is well known for its therapeutic purpose, in this review we are explaining about the T.P most important characteristics which have been reported. This plant due to its good antioxidant and antibacterial property show best medicine against various diseases such as diuretic, cyto-toxicity and diabetics. 