bluuebunny/crossref_metadata_2025 huggingface dataset:
A Risk Management Approach for a Sustainable Cloud Migration
Authors: Abdul Rahman Alifah , Islam Shareeful , Kalloniatis Christos , Gritzalis Stefanos
Published: November 2017

Cloud computing is not just about resource sharing, cost savings and optimisation of business performance; it also involves fundamental concerns on how businesses need to respond on the risks and challenges upon migration. Managing risks is critical for a sustainable cloud adoption. It includes several dimensions such as cost, practising the concept of green IT, data quality, continuity of services to users and clients, guarantee tangible benefits. This paper presents a risk management approach for a sustainable cloud migration. We consider four dimensions of sustainability, i.e., economic, environmental, social and technology to determine the viability of cloud for the business context. The risks are systematically identified and analysed based on the existing in house controls and the cloud service provider offerings. We use Dempster Shafer (D-S) theory to measure the adequacy of controls and apply semi-quantitative approach to perform risk analysis based on the theory of belief. The risk exposure for each sustainability dimension allows us to determine the viability of cloud migration. A practical migration use case is considered to determine the applicability of our work. The results identify the risk exposure and recommended control for the risk mitigation. We conclude that risks depend on specific migration case and both Cloud Service Provider (CSP) and users are responsible for the risk mitigation. Inherent risks can evolve due to the cloud migration.
New SmAPF Mesogens Designed for Analog Electrooptics Applications
Authors: Korblova Eva , Guzman Edward , Maclennan Joseph , Glaser Matthew , Shao Renfan , Garcia Edgardo , Shen Yongqiang , Visvanathan Rayshan , Clark Noel , Walba David
Published: November 2017

We have previously reported the first realization of an orthogonal ferroelectric bent-core SmAPF phase by directed design in mesogens with a single tricarbosilane-terminated alkoxy tail. Given the potentially useful electrooptic properties of this phase, including analog phase-only electrooptic index modulation with optical latching, we have been exploring its “structure space”, searching for novel SmAPF mesogens. Here, we report two classes of these—the first designed to optimize the dynamic range of the index modulation in parallel-aligned cells by lowering the bend angle of the rigid core, and the second expanding the structure space of the phase by replacing the tricarbosilane-terminated alkyl tail with a polyfluorinated polyethylene glycol oligomer.
Recent Progress and Required Developments in Atmospheric Corrosion of Galvanised Steel and Zinc
Authors: Cole Ivan
Published: November 2017

This paper reviews the progress in atmospheric corrosion of zinc since 2009. It firstly summarises the state of the art in 2009, then outlines progress since 2009, and then looks at the significance of this progress and the areas the need more research. Within this framework, it looks at climate effects, oxide formation, oxide properties, pitting, laboratory duplication of atmospheric corrosion, and modelling. The major findings are that there have been major advances in the fields understanding of the structure of corrosion patina, in particular their layered structure and the presence of compact layers, local corrosion attacks have been found to be a significant process in atmospheric corrosion and experiments under droplets are leading to new understanding of the criticality of drop size in regulating atmospheric corrosion processes. Further research is indicating that zinc oxide within corrosion products may promote the oxygen reduction reaction (ORR) and that, in porous oxides, the ORR would control pore chemistry and may promote oxide densification. There is a strong need for more research to understand more deeply the formation and properties of these layered oxides as well as additional research to refine and quantify our emerging understanding of corrosion under droplets.
Effective Thermal Expansion Property of Consolidated Granular Materials
Authors: Küçük Gülşad , Gonzalez Marcial , Cuitiño Alberto
Published: November 2017

Thermally-assisted compaction of granular materials is of keen interest in many engineering applications. A proper estimation of the material behavior of compacted granular materials is contingent upon the knowledge of microstructure formation, which is highly dependent on the bulk material properties and processing conditions, during the deformation stage. Originating from the pair interactions between particles, the macroscopic properties are obtained using various homogenization techniques and postulating continuum constitutive laws. While pioneers in this field have laid fundamental groundwork regarding effective medium descriptions, there exists a discrepancy between discrete and continuum level solutions. In our previous work, we elaborated a Particle Mechanics Approach (PMA) that integrates thermal contact and Hertzian deformation models to understand the thermo-mechanically-coupled consolidation problem. We also considered the analogous problem from the perspective of the conventional Continuum Mechanics Approach (CMA). In this study, following the multi-scale modeling framework, we propose an effective thermal expansion coefficient for the thermally-assisted compaction of granular materials.
An Investigation of the Micro-Electrical Discharge Machining of Nickel-Titanium Shape Memory Alloy Using Grey Relations Coupled with Principal Component Analysis
Authors: Abidi Mustufa , Al-Ahmari Abdulrahman , Siddiquee Arshad , Mian Syed , Mohammed Muneer , Rasheed Mohammed
Published: November 2017

Shape memory alloys (SMAs) are advanced engineering materials which possess shape memory effects and super-elastic properties. Their high strength, high wear-resistance, pseudo plasticity, etc., makes the machining of Ni-Ti based SMAs difficult using traditional techniques. Among all non-conventional processes, micro-electric discharge machining (micro-EDM) is considered one of the leading processes for micro-machining, owing to its high aspect ratio and capability to machine hard-to-cut materials with good surface finish.The selection of the most appropriate input parameter combination to provide the optimum values for various responses is very important in micro-EDM. This article demonstrates the methodology for optimizing multiple quality characteristics (overcut, taper angle and surface roughness) to enhance the quality of micro-holes in Ni-Ti based alloy, using the Grey–Taguchi method. A Taguchi-based grey relational analysis coupled with principal component analysis (Grey-PCA) methodology was implemented to investigate the effect of three important micro-EDM process parameters, namely capacitance, voltage and electrode material.The analysis of the individual responses established the importance of multi-response optimization. The main effects plots for the micro-EDM parameters and Analysis of Variance (ANOVA) indicate that every parameter does not produce same effect on individual responses, and also that the percent contribution of each parameter to individual response is highly varied. As a result, multi-response optimization was implemented using Grey-PCA. Further, this study revealed that the electrode material had the strongest effect on the multi-response parameter, followed by the voltage and capacitance. The main effects plot for the Grey-PCA shows that the micro-EDM parameters “capacitance” at level-2 (i.e., 475 pF), “discharge voltage” at level-1 (i.e., 80 V) and the “electrode material” Cu provided the best multi-response.
Revisiting Mg–Mg2Ni System from Electronic Perspective
Authors: Qian Zhao , Guo Weimin , Jiang Guanzhong , Xu Shaokun , Ahuja Rajeev , Liu Xiangfa
Published: November 2017

Both Mg and Mg2Ni are promising electrode materials in conversion-type secondary batteries. Earlier studies have shown their single-phase prospects in electro-devices, while in this work, we have quantitatively reported the electronic properties of their dual-phase materials, that is, Mg–Mg2Ni alloys, and analyzed the underlying reasons behind the property changes of materials. The hypoeutectic Mg–Mg2Ni alloys are found to be evidently more conductive than the hypereutectic Mg–Mg2Ni system. The density functional theory (DFT) calculations give the intrinsic origin of electronic structures of both Mg2Ni and Mg. The morphology of quasi-nanoscale eutectics is another factor that can affect the electronic properties of the investigated alloy system; that is, the electrical property change of the investigated alloys system is due to a combination of the intrinsic property difference between the two constituting phases and the change of eutectic microstructures that affect electron scattering. In addition, regarding the Mg–Mg2Ni alloy design for device applications, the electronic property and mechanical aspect should be well balanced.
Subsolidus Evolution of the Magnetite-Spinel-UlvöSpinel Solid Solutions in the Kovdor Phoscorite-Carbonatite Complex, NW Russia
Authors: Ivanyuk Gregory , Kalashnikov Andrey , Pakhomovsky Yakov , Bazai Ayya , Goryainov Pavel , Mikhailova Julia , Yakovenchuk Victor , Konopleva Nataly
Published: November 2017

The Kovdor phoscorite-carbonatite ore-pipe rocks form a natural series, where apatite and magnetite first gradually increase due to the presence of earlier crystallizing forsterite in the pipe marginal zone and then decrease as a result of carbonate development in the axial zone. In all lithologies, magnetite grains contain (oxy)exsolution inclusions of comparatively earlier ilmenite group minerals and/or later spinel, and their relationship reflects the concentric zonation of the pipe. The temperature and oxygen fugacity of titanomagnetite oxy-exsolution decreases in the natural rock sequence from about 500 °C to about 300 °C and from NNO + 1 to NNO − 3 (NNO is Ni-NiO oxygen fugacity buffer), with a secondary positive maximum for vein calcite carbonatite. Exsolution spinel forms spherical grains, octahedral crystals, six-beam and eight-beam skeletal crystals co-oriented with host magnetite. The ilmenite group minerals occur as lamellae oriented along {111} and {100} planes of oxy-exsolved magnetite. The kinetics of inclusion growth depends mainly on the diffusivity of cations in magnetite: their comparatively low diffusivities in phoscorite and carbonatites of the ore-pipe internal part cause size-independent growth of exsolution inclusions; while higher diffusivities of cations in surrounding rocks, marginal forsterite-rich phoscorite and vein calcite carbonatite result in size-dependent growth of inclusions.
Exploring the Virtuality Continuum for Complex Rule-Set Education in the Context of Soccer Rule Comprehension
Authors: Vargas González Andrés N. , Kapalo Katelynn , Koh Seng , LaViola Joseph
Published: November 2017

We present an exploratory study to assess the benefits of using Augmented Reality (AR) in training sports rule comprehension. Soccer is the chosen context for this study due to the wide range of complexity in the rules and regulations. Observers must understand and holistically evaluate the proximity of players in the game to the ball and other visual objects, such as the goal, penalty area, and other players. Grounded in previous literature investigating the effects of Virtual Reality (VR) scenarios on transfer of training (ToT), we explore how three different interfaces influence user perception using both qualitative and quantitative measures. To better understand how effective augmented reality technology is when combined with learning systems, we compare results on the effects of learning outcomes in three interface conditions: AR, VR and a traditional Desktop interface. We also compare these interfaces as measured by user experience, engagement, and immersion. Results show that there were no significance difference among VR and AR; however, these participants outperformed the Desktop group which needed a higher number of adaptations to acquire the same knowledge.
Hospital Audit as a Useful Tool in the Process of Introducing Falsified Medicines Directive (FMD) into Hospital Pharmacy Settings—A Pilot Study
Authors: Religioni Urszula , Swieczkowski Damian , Gawrońska Anna , Kowalczuk Anna , Drozd Mariola , Zerhau Mikołaj , Smoliński Dariusz , Radomiński Stanisław , Cwalina Natalia , Brindley David , Jaguszewski Miłosz J. , Merks Piotr
Published: November 2017

Background: Recently, the European Union has introduced the Falsified Medicines Directive (FMD). Additionally, in early 2016, a Delegated Act (DA) related to the FMD was published. The main objective of this study was to evaluate the usefulness of external audits in the context of implementing new regulations provided by the FMD in the secondary care environment. Methods: The external, in-person workflow audits were performed by an authentication company in three Polish hospital pharmacies. Each audit consisted of a combination of supervision (non-participant observation), secondary data analysis, and expert interviews with the use of an independently designed authorial Diagnostic Questionnaire. The questionnaire included information about hospital drug distribution procedures, data concerning drug usage, IT systems, medication order systems, the processes of medication dispensing, and the preparation and administration of hazardous drugs. Data analysis included a thorough examination of hospital documentation in regard to drug management. All data were subjected to qualitative analysis, with the aim of generating meaningful information through inductive inference. Results: Only one dispensing location in the Polish hospitals studied has the potential to be a primary authentication area. In the audited hospitals, an Automated Drug Dispensing System and unit dose were not identified during the study. Hospital wards contained an enclosed place within the department dedicated to drug storage under the direct supervision of senior nursing staff. An electronic order system was not available. In the largest center, unused medications are re-dispensed to different hospital departments, or may be sold to various institutions. Additionally, in one hospital pharmacy, pharmacists prepared parenteral nutrition and chemotherapeutic drugs for patients admitted to the hospital. Conclusions: External audits might prove beneficial in the course of introducing new regulations into everyday settings. However, such action should be provided before the final implementation of authentication services. To sum up, FMD can impact several hospital departments.
Fully Biodegradable Biocomposites with High Chicken Feather Content
Authors: Aranberri Ibon , Montes Sarah , Azcune Itxaso , Rekondo Alaitz , Grande Hans-Jürgen
Published: November 2017

The aim of this work was to develop new biodegradable polymeric materials with high loadings of chicken feather (CF). In this study, the effect of CF concentration and the type of biodegradable matrix on the physical, mechanical and thermal properties of the biocomposites was investigated. The selected biopolymers were polylactic acid (PLA), polybutyrate adipate terephthalate (PBAT) and a PLA/thermoplastic copolyester blend. The studied biocomposites were manufactured with a torque rheometer having a CF content of 50 and 60 wt %. Due to the low tensile strength of CFs, the resulting materials were penalized in terms of mechanical properties. However, high-loading CF biocomposites resulted in lightweight and thermal-insulating materials when compared with neat bioplastics. Additionally, the adhesion between CFs and the PLA matrix was also investigated and a significant improvement of the wettability of the feathers was obtained with the alkali treatment of the CFs and the addition of a plasticizer like polyethylene glycol (PEG). Considering all the properties, these 100% fully biodegradable biocomposites could be adequate for panel components, flooring or building materials as an alternative to wood–plastic composites, contributing to the valorisation of chicken feather waste as a renewable material.
Fusion Approaches for Land Cover Map Production Using High Resolution Image Time Series without Reference Data of the Corresponding Period
Authors: Tardy Benjamin , Inglada Jordi , Michel Julien
Published: November 2017

Optical sensor time series images allow one to produce land cover maps at a large scale. The supervised classification algorithms have been shown to be the best to produce maps automatically with good accuracy. The main drawback of these methods is the need for reference data, the collection of which can introduce important production delays. Therefore, the maps are often available too late for some applications. Domain adaptation methods seem to be efficient for using past data for land cover map production. According to this idea, the main goal of this study is to propose several simple past data fusion schemes to override the current land cover map production delays. A single classifier approach and three voting rules are considered to produce maps without reference data of the corresponding period. These four approaches reach an overall accuracy of around 80% with a 17-class nomenclature using Formosat-2 image time series. A study of the impact of the number of past periods used is also done. It shows that the overall accuracy increases with the number of periods used. The proposed methods require at least two or three previous years to be used.
Real-Time Alpine Measurement System Using Wireless Sensor Networks
Authors: Malek Sami , Avanzi Francesco , Brun-Laguna Keoma , Maurer Tessa , Oroza Carlos , Hartsough Peter , Watteyne Thomas , Glaser Steven
Published: November 2017

Monitoring the snow pack is crucial for many stakeholders, whether for hydro-power optimization, water management or flood control. Traditional forecasting relies on regression methods, which often results in snow melt runoff predictions of low accuracy in non-average years. Existing ground-based real-time measurement systems do not cover enough physiographic variability and are mostly installed at low elevations. We present the hardware and software design of a state-of-the-art distributed Wireless Sensor Network (WSN)-based autonomous measurement system with real-time remote data transmission that gathers data of snow depth, air temperature, air relative humidity, soil moisture, soil temperature, and solar radiation in physiographically representative locations. Elevation, aspect, slope and vegetation are used to select network locations, and distribute sensors throughout a given network location, since they govern snow pack variability at various scales. Three WSNs were installed in the Sierra Nevada of Northern California throughout the North Fork of the Feather River, upstream of the Oroville dam and multiple powerhouses along the river. The WSNs gathered hydrologic variables and network health statistics throughout the 2017 water year, one of northern Sierra’s wettest years on record. These networks leverage an ultra-low-power wireless technology to interconnect their components and offer recovery features, resilience to data loss due to weather and wildlife disturbances and real-time topological visualizations of the network health. Data show considerable spatial variability of snow depth, even within a 1 km 2 network location. Combined with existing systems, these WSNs can better detect precipitation timing and phase in, monitor sub-daily dynamics of infiltration and surface runoff during precipitation or snow melt, and inform hydro power managers about actual ablation and end-of-season date across the landscape.
Ambiguity among Managers in Small-Scale Enterprises: How to Handle Business and Workplace Health Management
Authors: Vinberg Stig , Hansen Elisabeth , Hedlund Marianne , Landstad Bodil
Published: November 2017

Despite extensive research on health in working life, few studies focus on this issue from the perspective of managers in small-scale enterprises (SSEs). To gain deeper knowledge of managers’ perceptions and strategies for dealing with workplace health management, 13 Norwegian and Swedish SSE managers were interviewed after participating in a workplace health development project. The methodical approach was based on Grounded Theory with a constructivist orientation. The main theme that emerged was ‘ambiguity in workplace health management and maintaining the business’, which was related to the categories ‘internal workplace settings’, ‘workplace surroundings’, and ‘leadership strategies’. The managers experienced ambiguity due to internal and external demands. These requirements were linked to the core challenges in dealing with multitasking leadership, financial decision-making, labour legislation, staff development and maintaining business. However, the managers developed new skills and competence and thereby a more reflexive approach and readiness to create a health-promoting workplace from being part of a development project. The implications are that managers in SSEs need to exchange experiences and discuss workplace health issues with other managers in networks. It is also important that occupational health services and social and welfare organizations use tailor-made models and strategies for supporting SSEs.
Energy Efficiency and Its Driving Factors in China’s Three Economic Regions
Authors: Shi Sheng-An , Xia Long , Meng Ming
Published: November 2017

Energy efficiency improvement is essential for China’s sustainable development of its social economy. Based on the provincial panel data of China’s three economic regions from 1990 to 2013, this research uses the data envelopment analysis (DEA) model to measure the total-factor energy efficiency, and the Tobit regression model to explore the driving factors of efficiency changes. Empirical results show: (1) Energy efficiency, energy consumption structure, and government fiscal scale are significantly positively correlated. (2) Industrial structure and per capita income level have negative correlation to energy efficiency; the impact of industrial structure on energy efficiency is relatively small. (3) The increase of carbon dioxide emissions will decrease the energy efficiency. Furthermore, with people becoming less conscious of energy conservation and emission reduction, energy efficiency will also decrease. (4) Specific energy policies will improve energy efficiency, and greater openness in coastal areas will also have the similar effect.
Fast and Efficient Data Forwarding Scheme for Tracking Mobile Targets in Sensor Networks
Authors: Zhou Mi , Zhao Ming , Liu Anfeng , Ma Ming , Wang Tiang , Huang Changqin
Published: November 2017

Transferring emergent target tracking data to sinks is a major challenge in the Industrial Internet of Things (IIoT), because inefficient data transmission can cause significant personnel and property loss. For tracking a constantly moving mobile target, sensing data should be delivered to sinks continuously and quickly. Although there is some related research, the end to end tracking delay is still unsatisfying. In this paper, we propose a Fast and Efficient Data Forwarding (FEDF) scheme for tracking mobile targets in sensor networks to reduce tracking delay and maintain a long lifetime. Innovations of the FEDF scheme that differ from traditional scheme are as follows: firstly, we propose a scheme to transmit sensing data through a Quickly Reacted Routing (QRR) path which can reduce delay efficiently. Duty cycles of most nodes on a QRR path are set to 1, so that sleep delay of most nodes turn 0. In this way, end to end delay can be reduced significantly. Secondly, we propose a perfect method to build QRR path and optimize it, which can make QRR path work more efficiently. Target sensing data routing scheme in this paper belongs to a kind of trail-based routing scheme, so as the target moves, the routing path becomes increasingly long, reducing the working efficiency. We propose a QRR path optimization algorithm, in which the ratio of the routing path length to the optimal path is maintained at a smaller constant in the worst case. Thirdly, it has a long lifetime. In FEDF scheme duty cycles of nodes near sink in a QRR path are the same as that in traditional scheme, but duty cycles of nodes in an energy-rich area are 1. Therefore, not only is the rest energy of network fully made use of, but also the network lifetime stays relatively long. Finally, comprehensive performance analysis shows that the FEDF scheme can realize an optimal end to end delay and energy utilization at the same time, reduce end to end delay by 87.4%, improve network energy utilization by 2.65%, and ensure that network lifetime is not less than previous research.
Compound-Specific Isotope Analysis (CSIA) Application for Source Apportionment and Natural Attenuation Assessment of Chlorinated Benzenes
Authors: Alberti Luca , Marchesi Massimo , Trefiletti Patrizia , Aravena Ramon
Published: November 2017

In light of the complex management of chlorobenzene (CB) contaminated sites, at which a hydraulic barrier (HB) for plumes containment is emplaced, compound-specific stable isotope analysis (CSIA) has been applied for source apportionment, for investigating the relation between the upgradient and downgradient of the HB, and to target potential CB biodegradation processes. The isotope signature of all the components potentially involved in the degradation processes has been expressed using the concentration-weighted average δ13C of CBs + benzene (δ13Csum). Upgradient of the HB, the average δ13Csum of −25.6‰ and −29.4‰ were measured for plumes within the eastern and western sectors, respectively. Similar values were observed for the potential sources, with δ13Csum values of −26.5‰ for contaminated soils and −29.8‰ for the processing water pipeline in the eastern and western sectors, respectively, allowing for apportioning of these potential sources to the respective contaminant plumes. For the downgradient of the HB, similar CB concentrations but enriched δ13Csum values between −24.5‰ and −25.9‰ were measured. Moreover, contaminated soils showed a similar δ13Csum signature of −24.5‰, thus suggesting that the plumes likely originate from past activities located in the downgradient of the HB. Within the industrial property, significant δ13C enrichments were measured for 1,2,4-trichlorobenzene (TCB), 1,2-dichlorobenzene (DCB), 1,3-DCB, and 1,4-DCBs, thus suggesting an important role for anaerobic biodegradation. Further degradation of monochlorobenzene (MCB) and benzene was also demonstrated. CSIA was confirmed to be an effective approach for site characterization, revealing the proper functioning of the HB and demonstrating the important role of natural attenuation processes in reducing the contamination upgradient of the HB.
Spatiotemporal Variability of Extreme Summer Precipitation over the Yangtze River Basin and the Associations with Climate Patterns
Authors: Su Zhenkuan , Hao Zhenchun , Yuan Feifei , Chen Xi , Cao Qing
Published: November 2017

Understanding the spatiotemporal variability of seasonal extreme precipitation and its linkage with climate patterns is of great importance for water resource management over the Yangtze River Basin. Hence, this study examined the spatiotemporal variability of seasonal extreme precipitation through the archetypal analysis (AA), by which observations were decomposed and characterized as several extreme modes. Six archetypes were identified and can obviously exhibit the features of events with above average or below average precipitation. Summer precipitation is the most variable compared to the winter, spring, and autumn precipitation through the trend analysis. It ranged from extremely dry (A6) to normal (A1 and A2) to extremely wet (A4). Climate teleconnections to the four archetypes for summer precipitation and relative importance of climate patterns were thus investigated. Results show that El Niño Southern Oscillation index is the strongest determinant of the ensuing archetypes representing the events with above average precipitation, while the Atlantic Multi-decadal Oscillation (AMO) contributes most to the events with below-average precipitation. A warm phase of the Pacific Decadal Oscillation (PDO) is significantly correlated with the above-average precipitation.
Aerosol Constraints on the Atmosphere of the Hot Saturn-mass Planet WASP-49b
Authors: Cubillos Patricio E. , Fossati Luca , Erkaev Nikolai V. , Malik Matej , Tokano Tetsuya , Lendl Monika , Johnstone Colin P. , Lammer Helmut , Wyttenbach Aurélien
Published: November 2017

The strong, nearly wavelength-independent absorption cross section of aerosols produces featureless exoplanet transmission spectra, limiting our ability to characterize their atmospheres. Here, we show that even in the presence of featureless spectra, we can still characterize certain atmospheric properties. Specifically, we constrain the upper and lower pressure boundaries of aerosol layers, and present plausible composition candidates. We study the case of the bloated Saturn-mass planet WASP-49 b, where near-infrared observations reveal a flat transmission spectrum between 0.7 and 1.0 μm. First, we use a hydrodynamic upper-atmosphere code to estimate the pressure reached by the ionizing stellar high-energy photons at

bar, setting the upper pressure boundary where aerosols could exist. Then, we combine HELIOS and Pyrat Bay radiative-transfer models to constrain the temperature and photospheric pressure of atmospheric aerosols, in a Bayesian framework. For WASP-49 b, we constrain the transmission photosphere (hence, the aerosol deck boundaries) to pressures above

bar (100× solar metallicity),

bar (solar), and

bar (0.1× solar) as the lower boundary, and below

bar as the upper boundary. Lastly, we compare condensation curves of aerosol compounds with the planet’s pressure-temperature profile to identify plausible condensates responsible for the absorption. Under these circumstances, we find these candidates:

(at 100× solar metallicity); Cr and MnS (at solar and 0.1× solar); and forsterite, enstatite, and alabandite (at 0.1× solar).
The Structure of the Broad-line Region in Active Galactic Nuclei. II. Dynamical Modeling of Data From the AGN10 Reverberation Mapping Campaign
Authors: Grier C. J. , Pancoast A. , Barth A. J. , Fausnaugh M. M. , Brewer B. J. , Treu T. , Peterson B. M.
Published: November 2017

We present inferences on the geometry and kinematics of the broad-Hβ line-emitting region in four active galactic nuclei monitored as part of the fall 2010 reverberation mapping campaign at MDM Observatory led by the Ohio State University. From modeling the continuum variability and response in emission-line profile changes as a function of time, we infer the geometry of the Hβ-emitting broad-line regions (BLRs) to be thick disks that are close to face-on to the observer with kinematics that are well-described by either elliptical orbits or inflowing gas. We measure the black hole mass to be

for Mrk 335,

 for Mrk 1501,

 for 3C 120, and

 for PG 2130+099. These black hole mass measurements are not based on a particular assumed value of the virial scale factor f, allowing us to compute individual f factors for each target. Our results nearly double the number of targets that have been modeled in this manner, and we investigate the properties of a more diverse sample by including previously modeled objects. We measure an average scale factor

in the entire sample of

when the line dispersion is used to characterize the line width, which is consistent with the values derived using the normalization of the

–σ relation. We find that the scale factor f for individual targets is likely correlated with the black hole mass, inclination angle, and opening angle of the BLR, but we do not find any correlation with the luminosity.
Disentangling the Radio Emission of the Supernova Remnant W51C
Authors: Zhang M. F. , Tian W. W. , Leahy D. A. , Zhu H. , Cui X. H. , Shan S. S.
Published: November 2017

We simulate the evolution of supernova remnant (SNR) W51C. The simulation shows the existence of a new northeast edge. We present the magnetic field structure of the W51 complex (SNR W51C and two H ii regions W51A/B) by employing the 11 cm survey data of Effelsberg. This new edge is identified and overlaps with W51A along the line of sight, which gives a new angular diameter of about 37′ for the quasi-circular remnant. In addition, we assemble the OH spectral lines (1612/1665/1720 MHz) toward the complex by employing the newly released THOR (The HI OH Recombination line survey of Milky Way) data. We find that the known 1720 MHz OH maser in the W51B/C overlap area is located away from the detected 1612/1665 MHz absorption region. The latter is sitting at the peak of the H ii region G49.2-0.35 within W51B.
The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex
Authors: Sun Ning-Chen , Grijs Richard de , Subramanian Smitha , Bekki Kenji , Bell Cameron P. M. , Cioni Maria-Rosa L. , Ivanov Valentin D. , Marconi Marcella , Oliveira Joana M. , Piatti Andrés E. , Ripepi Vincenzo , Rubele Stefano , Tatton Ben L. , Loon Jacco Th. van
Published: November 2017

Star formation is a hierarchical process, forming young stellar structures of star clusters, associations, and complexes over a wide range of scales. The star-forming complex in the bar region of the Large Magellanic Cloud is investigated with upper main-sequence stars observed by the VISTA Survey of the Magellanic Clouds. The upper main-sequence stars exhibit highly nonuniform distributions. Young stellar structures inside the complex are identified from the stellar density map as density enhancements of different significance levels. We find that these structures are hierarchically organized such that larger, lower-density structures contain one or several smaller, higher-density ones. They follow power-law size and mass distributions, as well as a lognormal surface density distribution. All these results support a scenario of hierarchical star formation regulated by turbulence. The temporal evolution of young stellar structures is explored by using subsamples of upper main-sequence stars with different magnitude and age ranges. While the youngest subsample, with a median age of log(τ/yr) = 7.2, contains the most substructure, progressively older ones are less and less substructured. The oldest subsample, with a median age of log(τ/yr) = 8.0, is almost indistinguishable from a uniform distribution on spatial scales of 30–300 pc, suggesting that the young stellar structures are completely dispersed on a timescale of ∼100 Myr. These results are consistent with the characteristics of the 30 Doradus complex and the entire Large Magellanic Cloud, suggesting no significant environmental effects. We further point out that the fractal dimension may be method dependent for stellar samples with significant age spreads.
The Outer Halo of the Milky Way as Probed by RR Lyr Variables from the Palomar Transient Facility*
Authors: Cohen Judith G. , Sesar Branimir , Bahnolzer Sophianna , He Kevin , Kulkarni Shrinivas R. , Prince Thomas A. , Bellm Eric , Laher Russ R.
Published: November 2017

RR Lyrae stars are ideal massless tracers that can be used to study the total mass and dark matter content of the outer halo of the Milky Way (MW). This is because they are easy to find in the light-curve databases of large stellar surveys and their distances can be determined with only knowledge of the light curve. We present here a sample of 112 RR Lyr stars beyond 50 kpc in the outer halo of the MW, excluding the Sgr streams, for which we have obtained moderate-resolution spectra with Deimos on the Keck II Telescope. Four of these have distances exceeding 100 kpc. These were selected from a much larger set of 447 candidate RR Lyr stars that were data-mined using machine-learning techniques applied to the light curves of variable stars in the Palomar Transient Facility database. The observed radial velocities taken at the phase of the variable corresponding to the time of observation were converted to systemic radial velocities in the Galactic standard of rest. From our sample of 112 RR Lyr stars we determine the radial velocity dispersion in the outer halo of the MW to be ∼90 km s−1 at 50 kpc, falling to about 65 km s−1 near 100 kpc once a small number of major outliers are removed. With reasonable estimates of the completeness of our sample of 447 candidates and assuming a spherical halo, we find that the stellar density in the outer halo declines as

.
Very Compact Millimeter Sizes for Composite Star-forming/AGN Submillimeter Galaxies
Authors: Ikarashi Soh , Caputi Karina I , Ohta Kouji , Ivison R. J. , Lagos Claudia D. P , Bisigello Laura , Hatsukade Bunyo , Aretxaga Itziar , Dunlop James S , Hughes David H , Iono Daisuke , Izumi Takuma , Kashikawa Nobunari , Koyama Yusei , Kawabe Ryohei , Kohno Kotaro , Motohara Kentaro , Nakanishi Kouichiro , Tamura Yoichi , Umehata Hideki , Wilson Grant W , Yabe Kiyoto , Yun Min S
Published: November 2017

We report the study of the far-infrared (IR) sizes of submillimeter galaxies (SMGs) in relation to their dust-obscured star formation rate (SFR) and active galactic nuclei (AGN) presence, determined using mid-IR photometry. We determined the millimeter-wave (

m) sizes of 69 Atacama Large Millimeter/submillimeter Array (ALMA)-identified SMGs, selected with

confidence on ALMA images (

–7.4 mJy). We found that all of the SMGs are located above an avoidance region in the size-flux plane, as expected by the Eddington limit for star formation. In order to understand what drives the different millimeter-wave sizes in SMGs, we investigated the relation between millimeter-wave size and AGN fraction for 25 of our SMGs at z = 1–3. We found that the SMGs for which the mid-IR emission is dominated by star formation or AGN have extended millimeter-sizes, with respective median

and

kpc. Instead, the SMGs for which the mid-IR emission corresponds to star-forming/AGN composites have more compact millimeter-wave sizes, with median

kpc. The relation between millimeter-wave size and AGN fraction suggests that this size may be related to the evolutionary stage of the SMG. The very compact sizes for composite star-forming/AGN systems could be explained by supermassive black holes growing rapidly during the SMG coalescing, star-formation phase.
Ennui et adolescence. Entre défense et attente
Authors: Nicolò Anna Maria , Accetti Laura
Published: November 2017

Dans cet article, les auteures explorent les divers aspects de l’ennui, un phénomène très répandu, surtout à l’adolescence. A partir d’une réflexion sur ses possibles origines, elles montrent que l’ennui s’entrecroise avec différents cadres psychopathologiques. Le matériel clinique, tiré des analyses de deux adolescents, montre que l’ennui peut être considéré surtout comme une défense. Dans le premier cas, il s’agit d’un évitement pour réduire au silence la charge pulsionnelle liée au désir, dans un désinvestissement de la relation entre le sujet et les objets internes et externes. Dans le deuxième cas, l’adolescent fait une tentative désespérée, à travers l’ennui, pour contenir une profonde dépression et cacher des fantasmes pervers.
La résistance, résurgence du détruit-trouvé dans l’espace analytique ?
Authors: Papineau Marie , Sasseville-Lahaie Catherine
Published: November 2017

La présente réflexion développe l’idée que la résistance serait reliée à la résurgence du processus du détruit-trouvé. Le détruit-trouvé renvoie à une expérience cruciale du développement chez l’enfant, décrite par Winnicott puis approfondie par Roussillon. La psyché du patient mettrait en place dans l’espace analytique une série de manifestations de résistance au changement. Ces résistances auraient-elles aussi comme fonction de détruire l’analyste, pour ultimement le trouver ?
Les feuilles mortes
Authors: Jourdan-Peyrony Jessica , Servant Benoît
Published: November 2017

Les auteurs s’intéressent à des patients suivis en hôpital de jour soins-études et qui manifestent une difficulté particulière à venir. Ils proposent de rattacher celle-ci à une intolérance à l’ennui, elle-même liée à une défaillance dans la capacité à jouer, à être seul, et à accepter la temporalité. Toutes trois seraient sous-tendues par leur refus de l’altérité de l’autre-sujet. A partir de cette interprétation, les auteurs indiquent les pistes thérapeutiques susceptibles d’aider ces patients à se dégager de cette impasse.
Tuer le temps long
Authors: Verdon Benoît
Published: November 2017

La clinique de la vieillesse est particulièrement traversée par la question de l’ennui. Gouffre ouvrant sur l’angoisse, brouillard protecteur contre trop d’agitation intérieure que le moi peine à traiter, source d’une ultime rencontre de soi, l’ennui n’est pas à l’image du vide de la pensée, de l’hébétude et de l’inertie du corps qui souvent saturent la représentation que l’on en a. Le temps qui passe, et ne passe pas, la mort, l’Infantile, le plaisir, la faute peuvent s’avérer des acteurs fourmillants sous l’engluement et l’enfermement apparent, et participer de potentialités de changement inattendues, témoins de l’effectivité de la causalité psychique.
Quand l’ennui est proscrit. Activisme et (a)conflictualité psychique dans les classes préparatoires et les grandes écoles
Authors: Dejours Roxane
Published: November 2017

À partir d’une recherche menée auprès de 51 préparationnaires, l’auteur interroge les conséquences de la disparition radicale des temps morts et des espaces propices à la naissance du sentiment d’ennui dans les classes préparatoires et les grandes écoles, du point de vue du fonctionnement psychique des sujets. L’article montre notamment comment le recours à l’activisme, retrouvé chez ces derniers, se déploie corrélativement à une abrasion défensive des questionnements existentiels et de l’activité fantasmatique de ces étudiants, nous amenant à nous questionner sur l’effectivité ou l’absence d’élaboration des conflits spécifiques à la fin de l’adolescence.
La contenance psychique à l’épreuve de l’ennui dans les autismes
Authors: Chocron Michael
Published: November 2017

Partant du ressenti d’ennui, l’auteur proposera dans un premier temps une lecture théorique générale avant d’envisager pourquoi ce ressenti est peu présent chez les personnes autistes. Ce ressenti, plutôt commun, pourrait alors être envisagé comme un indicateur du recours du sujet à un mode relationnel archaïque imposant une mobilisation psychique à autrui. S’appuyant sur la constatation d’un ressenti moins présent chez les sujets présentant un autisme, l’auteur en proposera une interprétation théorique avant d’envisager comment la question de l’ennui, liée à celle de l’autonomie psychique, pourrait être appréhendée dans un cadre institutionnel.
La psychanalyse du Rio de la Plata
Authors: Montes de Oca Marcela
Published: November 2017

L’auteur propose une introduction au dossier « La Psychanalyse du Rio de la Plata », aux auteurs qui y figurent, ainsi qu’une brève présentation de l’histoire de la psychanalyse en Argentine et en Uruguay – surtout à partir de 1955 – en portant une attention particulière aux filiations analytiques des protagonistes.
Parcours pour donner sa place au singulier
Authors: Moreno Julio , Artaloytia Pilar
Published: November 2017

L’auteur envisage deux modalités logiques différentes, qui se juxtaposent sans s’articuler dans le psychisme : a) la modalité associative qui se sert des représentations, respecte la causalité et les déterminations sans pour autant atteindre une représentation complète ; b) la modalité connective qui « capte » le dehors, le non représenté, s’approprie de ce qui se présente sans médiation représentative. Il y a un aller-retour entre les deux logiques se limitant l’une l’autre. Il existe par ailleurs une puissante force qui nous fait nous sentir Un sur la voie continue du temps. Dans son dernier livre (Moreno, 2016), l’auteur se réfère à une psychanalyse qui tente de produire des cartes changeantes et imprévisibles dans l’immanence de la situation analytique.
Inconscient et/ou inconscientisation, état ou fonctionnement psychique. Défis pour une psychanalyse contemporaine
Authors: C. Marucco Norberto , Corlobé Salomon Fabienne
Published: November 2017

L’auteur expose sa conception de ce qui est inconscient , produit d’une modalité du fonctionnement psychique qu’il nomme processus d’inconscientisation, et qu’il distingue de l’inconscient en tant qu’instance ou système. Ces phénomènes ­d’inconscientisation, dénommés zones psychiques, sont repérés à partir d’une relecture de l’œuvre de Freud et des auteurs post freudiens et de la dynamique transfert/contre-transférentielle. Il s’agit d’un inconscient non refoulé, dont l’action marquante pour le sujet se trouve au niveau de la création de l’idéal, de la problématique de ­l’estime de soi, de l’état amoureux pathologique et des addictions. D’autres manifestations en sont la zone de la pulsion de mort où sont inclus la compulsion de répétition et le trauma, ainsi que la zone du fétichisme. C’est là que, pour l’auteur, se situent les défis de la psychanalyse contemporaine.
La psychanalyse multifamiliale pour adolescents à Buenos Aires
Authors: Rabain Nicolas
Published: November 2017

La psychanalyse multifamiliale consiste en la réunion de plusieurs patients et de leurs parents autour de cothérapeutes. En prenant appui sur un matériel intergénérationnel et sur les jeux identificatoires entre les participants, l’auteur montre comment les groupes analytiques multifamiliaux contribuent à relancer la conflictualité interne des adolescents et de leurs parents, notamment chez des patients jusqu’alors réfractaires à toute prise en charge.
La rumeur à l’ère des réseaux sociaux numériques
Authors: Boatini Júnior Danton José , Tonin Juliana
Published: November 2017

L’objectif de cet article est de comprendre la manifestation des rumeurs avec l’apparition des réseaux sociaux numériques, depuis la seconde moitié des années 2000. La rumeur est à considérer comme un phénomène ancien, qui dépasse les contextes historiques et les moyens d’expression disponibles. Cependant, leur permanence dans un milieu où, censément, l’accès aux informations et la conséquente possibilité de vérification de ces dernières, est considérée comme l’une des grandes valeurs d’Internet, semble paradoxal. En ce sens, nous proposons de comprendre la notion de rumeur et ses principaux modes de diffusion contemporains en étudiant le cas Guarujá, analysé à la lumière des perspectives développées par la sociologie de l’imaginaire.
Au-delà du jardin : une des sources imaginales du problème de l’environnement
Authors: D’Andrea Fabio
Published: November 2017

On peut essayer de comprendre l’attitude occidentale envers l’espace naturel en étudiant l’évolution de l’espace exemplaire du jardin le long des siècles. L’on s’aperçoit que, du passage du verger médiéval au jardin baroque, de celui-ci au jardin à l’anglaise et ensuite à l’abandon du jardin en faveur des excursions en plein air avec la naissance des randonnées et du trekking , on est devant une figure paradoxale de l’affirmation du rationalisme et de la modernité qui s’achève par la primauté du sens de la vue et l’évacuation du côté sauvage de l’environnement naturel et de sa transformation en image plastifiée. Pour avoir une chance de faire face à la crise environnementale du XXI e  siècle, il faudrait prendre conscience de ces dynamiques imaginales et redécouvrir la matérialité et la contradictorialité aussi bien de l’homme que de la nature.
Pourquoi la gestation pour autrui dite « éthique » ne peut être
Authors: Segalen Martine
Published: November 2017

Constatant les dérives des pratiques de la grossesse pour autrui, des chercheurs, des particuliers, des groupes militants plaident pour sa régulation, en évoquant une gpa « éthique » ou « altruiste », d’où toute relation commerciale serait exclue. Cet article analyse les causes du développement de la pratique, les cadres sociaux qui sous-tendent les discours des mères qui portent des enfants pour le compte d’autrui, les termes qui sont désormais employés afin de les faire disparaître en tant que mères et montre les effets de la mise en place d’un marché mondialisé de la procréation pour autrui. Au nom du refus de l’instrumentation du corps féminin et de la marchandisation de l’enfant, il montre que ce qui est « éthique », c’est l’abolition universelle de la pratique.