bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study on Interfacial Bond Behavior between CFRP Sheets and Steel Plates under Fatigue Loading
Authors: Zhang Long , Cao Shuangyin , Tao Xin
Published: January 2019

Using carbon fiber reinforced polymer (CFRP) composites for enhancing the fatigue behavior of the steel structures will be an important application. As the most critical part, the fatigue behavior of the CFRP-to-steel bonded interface directly determines the strengthening effect of steel structures reinforced by CFRP. In this paper, a series of CFRP-to-steel double-shear specimens are performed in order to study the interfacial bond behavior between CFRP and steel under fatigue loading. Two parameters are considered: the upper bound value and the lower bound value of the fatigue loading. An analysis of test results indicates that the crack development rate increases with the increment of the stress ratio or stress level and the crack development process includes two phases: crack stable development phase and debonding failure phase. A calculation model is put forward to describe the relationship between the crack development rate and the stress level. Besides, it can be obtained from the test results that the fatigue lives of the specimens decrease with the increment of the stress level. The empirical formula of S-N curve based on the form of single logarithm formula is proposed and the fatigue limit under the experimental conditions in this paper is determined to be 0.343 by computational analysis.
Effect of Activating Agent on the Properties of TiO2/Activated Carbon Heterostructures for Solar Photocatalytic Degradation of Acetaminophen
Authors: Peñas-Garzón Manuel , Gómez-Avilés Almudena , Bedia Jorge , Rodriguez Juan J. , Belver Carolina
Published: January 2019

Several activated carbons (ACs) were prepared by chemical activation of lignin with different activating agents (FeCl3, ZnCl2, H3PO4 and KOH) and used for synthesizing TiO2/activated carbon heterostructures. These heterostructures were obtained by the combination of the activated carbons with a titania precursor using a solvothermal treatment. The synthesized materials were fully characterized (Wavelength-dispersive X-ray fluorescence (WDXRF), X-ray diffraction (XRD), Scanning electron microscopy (SEM), N2 adsorption-desorption, Fourier transform infrared (FTIR) and UV-visible diffuse reflectance spectra (UV-Vis DRS) and further used in the photodegradation of a target pharmaceutical compound (acetaminophen). All heterostructures were composed of anatase phase regardless of the activated carbon used, while the porous texture and surface chemistry depended on the chemical compound used to activate the lignin. Among all heterostructures studied, that obtained by FeCl3-activation yielded complete conversion of acetaminophen after 6 h of reaction under solar-simulated irradiation, also showing high conversion after successive cycles. Although the reaction rate was lower than the observed with bare TiO2, the heterostructure showed higher settling velocity, thus being considerably easier to recover from the reaction medium.
Sclerosing Pneumocytoma: A Ten-Year Experience at a Western Balkan University Hospital
Authors: Lovrenski Aleksandra , Vasilijević Milena , Panjković Milana , Tegeltija Dragana , Vučković Dejan , Baroš Ilija , Lovrenski Jovan
Published: January 2019

Background and objective: Sclerosing pneumocytoma is a rare, benign tumor of the lung that represents a diagnostic challenge due to the diversity of pathohistological findings. The aim of this study was to present a 10-year experience with sclerosing pneumocytoma of a large center for the diagnosis and treatment of pulmonary diseases, and to emphasize differential diagnostic dilemmas as a potential source of errors. Material and Methods: This represents a retrospective study of six patients diagnosed and treated with sclerosing pneumocytoma in the 10-year period. The study analyzed various parameters, which are: Sex, age, symptoms, size and localization of the tumor, and its gross and histological features. Results: Sclerosing pneumocytoma was more frequently diagnosed in females (83.34%). The patients ranged in age from 38 to 61. Most of the patients (66.66%) were asymptomatic. Two patients underwent a video-assisted thoracoscopic surgery, two patients had a video-assisted minithoracotomy, and two patients underwent a thoracotomy in order to remove the tumor. The tumor was localized in the left lower lobe, in the right upper lobe, and in the right lower lobe in 50%, 33.34%, and 16.66% of patients, respectively. The tumor size ranged from 1 to 2.5 cm. A pathohistological examination of all six cases reported that all four major histological patterns were found in tissue sections: solid, papillary, sclerosing, and hemorrhagic. In all six cases, an immunohistochemical analysis showed positive expression of TTF-1 and panCK in surface epithelial cells, and TTF-1 positivity and panCK negativity in round stromal cells. Conclusions: Sclerosing pneumocytoma is a strictly histological diagnosis supported by clinical and radiological findings and corresponding immunohistochemical methods. Lung pathologists should always keep this tumor in mind, since its spectrum of differential diagnosis is wide, and therefore it can be an important diagnostic pitfall.
Vertical Section Observation of the Solid Flow in a Blast Furnace with a Cutting Method
Authors: Lu Yuanxiang , Jiang Zeyi , Zhang Xinru , Wang Jingsong , Zhang Xinxin
Published: January 2019

The solid flow plays an important role in blast furnace (BF) ironmaking. In the paper, the descending behavior of solid flow in BFs was investigated by a cold experimental BF model and numerical simulation via the discrete element method (DEM). To eliminate the flat wall effect on the structure of solid flow in lab observations, a cutting method was developed to observe the vertical section of the solid flow by inserting a transparent plate into the experimental BF model. Both the experimental and numerical results indicated that plug flow is the main solid flow pattern in the upper and middle zones of BFs during burden descending. Meanwhile, a slight convergence flow and a deadman zone form at the lower part of the bosh. In addition, the boundary between the plug flow and convergence flow in BFs was determined by analyzing the velocity of the burden in vertical directions and the Wilcox–Swailes coefficient (Uws). The results indicated that the Uws can be defined as a critical value to determine the solid flow patterns. When Uws ≥ 0.65, the plug flow is dominant. When Uws < 0.65, the convergence flow is dominant. The findings may have important implications to understand the structure of the solid flow in BFs.
Effect of Rosmarinic Acid on the Serum Parameters of Glucose and Lipid Metabolism and Oxidative Stress in Estrogen-Deficient Rats
Authors: Zych Maria , Kaczmarczyk-Sedlak Ilona , Wojnar Weronika , Folwarczna Joanna
Published: January 2019

Rosmarinic acid is found in medicinal and spice plants such as rosemary, lemon balm, and mint. The aim of the study was to investigate the effect of rosmarinic acid on parameters of glucose and lipid metabolism and parameters of oxidative stress in rats in the early phase of estrogen deficiency. The study was carried out on mature female Wistar rats divided into the following groups: sham-operated control rats, ovariectomized control rats, and ovariectomized rats treated orally with rosmarinic acid at a dose of 10 mg/kg or 50 mg/kg daily for 28 days. The concentration of sex hormones, parameters related to glucose and lipid metabolism as well as parameters of antioxidant abilities and oxidative damage were determined in the blood serum. In the ovariectomized control rats, the homeostasis model assessment of insulin resistance (HOMA-IR) index and cholesterol concentration increased, the superoxide dismutase activity increased, and the reduced glutathione concentration decreased. Administration of rosmarinic acid at both doses induced decreases in the fructosamine concentration and HOMA-IR, an increase in the concentration of reduced glutathione, and a decrease in the concentration of advanced oxidation protein products in ovariectomized rats. Moreover, rosmarinic acid at a dose of 50 mg/kg induced a decrease in the total cholesterol and triglyceride concentrations. The results indicate that rosmarinic acid may be useful in the prevention of metabolic disorders associated with estrogen deficiency, however further studies are necessary.
Accurate Wide Angle SAR Imaging Based on LS-CS-Residual
Authors: Wei Zhonghao , Zhang Bingchen , Wu Yirong
Published: January 2019

Wide angle synthetic aperture radar (WASAR) receives data from a large angle, which causes the problem of aspect dependent scattering. L 1 regularization is a common compressed sensing (CS) model. The L 1 regularization based WASAR imaging method divides the whole aperture into subapertures and reconstructs the subaperture images individually. However, the aspect dependent scattering recovery of it is not accurate. The subaperture images of WASAR can be regarded as the SAR video. The support set among the different frames of SAR video are highly overlapped. Least squares on compressed sensing residuals (LS-CS-Residuals) can reconstruct the time sequences of sparse signals which change slowly with time. This is to replace CS on the observation by CS on the least squares (LS) residual computed using the prior estimate of the support. In this paper, we introduce LS-CS-Residual into WASAR imaging. In the iteration of LS-CS-Residual, the azimuth-range decoupled operators are used to avoid the huge memory cost. Real data processing results show that LS-CS-Residual can estimate the aspect dependent scatterings of the targets more accurately than CS based methods.
Influence of Uniaxial Stress on the Shear-Wave Spectrum Propagating in Steel Members
Authors: Li Zuohua , He Jingbo , Liu Diankun , Liu Nanxi , Long Zhili , Teng Jun
Published: January 2019

Structural health monitoring technologies have provided extensive methods to sense the stress of steel structures. However, monitored stress is a relative value rather than an absolute value in the structure’s current state. Among all the stress measurement methods, ultrasonic methods have shown great promise. The shear-wave amplitude spectrum and phase spectrum contain stress information along the propagation path. In this study, the influence of uniaxial stress on the amplitude and phase spectra of a shear wave propagating in steel members was investigated. Furthermore, the shear-wave amplitude spectrum and phase spectrum were compared in terms of characteristic frequency (CF) collection, parametric calibration, and absolute stress measurement principles. Specifically, the theoretical expressions of the shear-wave amplitude and phase spectra were derived. Three steel members were used to investigate the effect of the uniaxial stress on the shear-wave amplitude and phase spectra. CFs were extracted and used to calibrate the parameters in the stress measurement formula. A linear relationship was established between the inverse of the CF and its corresponding stress value. The test results show that both the shear-wave amplitude and phase spectra can be used to evaluate uniaxial stress in structural steel members.
A Frequency Signature RFID Chipless Tag for Wearable Applications
Authors: Corchia Laura , Monti Giuseppina , Tarricone Luciano
Published: January 2019

In this paper, a frequency-signature Radio-Frequency Identification (RFID) chipless tag for wearable applications is presented. The results achieved for a fully-textile solution guaranteeing a seamless integration in clothes are reported and discussed. The proposed tag consists of two planar monopole antennas and a 50 Ω microstrip line loaded with multiple resonators. In order to achieve a compact size, the resonators are slotted on the ground plane of the microstrip line. As for the antennas, the same geometry was exploited for both the TX and the RX tag antenna. In particular, it consists of a proximity fed planar monopole on a ground plane. The selected geometry guarantees easy integration with the multi-resonator structure. Numerical and experimental data referring to a 2-bit implementation are presented and discussed. For fabricating all the prototypes, a layer of pile was used as a substrate, while an adhesive non-woven conductive fabric was exploited for the fabrication of the conductive parts. Experimental tests demonstrate that although the performance of the final device strongly depends on the properties of the used materials and on the imperfections of the fabrication process, the proposed frequency-signature RFID chipless tag is suitable for wearable applications, such as anti-counterfeiting systems and laundry labels.
An Automatic Embedded Device Registration Procedure Based on the OGC SensorThings API
Authors: Huang Chih-Yuan , Chen Hsin-Hsien
Published: January 2019

Sensor Web and Internet of Things (IoT) (SW-IoT) have been attracting attention from various fields. Both of them deploy networks of embedded devices to monitor physical properties (i.e., sensing capability) or to be controlled (i.e., tasking capability). One of the most important tasks to realize the SW-IoT vision is to establish an open and interoperable architecture, across the device layer, gateway layer, service layer, and application layer. To achieve this objective, many organizations and alliances propose standards for different layers. Among the standards, Open Geospatial Consortium (OGC) SensorThings API is arguably one of the most complete and flexible service standards. However, the SensorThings API only address heterogeneity issues in the service layer. Embedded devices following proprietary protocols need to join closed ecosystems and then link to the SensorThings API ecosystem via customized connectors. To address this issue, one could first follow another device layer and gateway layer open standards and then perform data model mapping with the SensorThings API. However, the data model mapping is not always straightforward as the standards were designed independently. Therefore, this research tries to propose a more direct solution to unify the entire SW-IoT architecture by extending the SensorThings API ecosystem to the gateway layer and the device layer. To be specific, this research proposes SW-IoT Plug and Play (IoT-PNP) to achieve an automatic registration procedure for embedded devices. The IoT-PNP contains three main components: (1) A description file describing device metadata and capabilities, (2) a communication protocol between the gateway layer and the device layer for establishing connections, and (3) an automatic registration procedure for both sensing and tasking capabilities. Overall, we believe the proposed solution could help achieve an open and interoperable SW-IoT end-to-end architecture based on the OGC SensorThings API.
High-Sensitivity Microwave Sensor Based on an Interdigital-Capacitor-Shaped Defected Ground Structure for Permittivity Characterization
Authors: Yeo Junho , Lee Jong-Ig
Published: January 2019

This study proposes a high-sensitivity microwave sensor based on an interdigital-capacitor-shaped defected ground structure (IDCS-DGS) in a microstrip transmission line for the dielectric characterization of planar materials. The proposed IDCS-DGS was designed by modifying the straight ridge structure of an H-shaped aperture. The proposed sensor was compared with conventional sensors based on a double-ring complementary split ring resonator (CSRR), a single-ring CSRR, and a rotated single-ring CSRR. All the sensors were designed and fabricated on 0.76-mm-thick RF-35 substrate and operated at 1.5 GHz under unloaded conditions. Five different standard dielectric samples with dielectric constants ranging from 2.17 to 10.2 were tested for the sensitivity comparison. The sensitivity of the proposed sensor was measured by the shift in the resonant frequency of the transmission coefficient, and compared with conventional sensors. The experiment results show that the sensitivity of the proposed sensor was two times higher for a low permittivity of 2.17 and it was 1.42 times higher for a high permittivity of 10.2 when compared with the double-ring CSRR-based sensor.
Single-Trial Cognitive Stress Classification Using Portable Wireless Electroencephalography
Authors: Blanco Justin A. , Vanleer Ann C. , Calibo Taylor K. , Firebaugh Samara L.
Published: January 2019

This work used a low-cost wireless electroencephalography (EEG) headset to quantify the human response to different cognitive stress states on a single-trial basis. We used a Stroop-type color–word interference test to elicit mild stress responses in 18 subjects while recording scalp EEG. Signals recorded from thirteen scalp locations were analyzed using an algorithm that computes the root mean square voltages in the theta (4–8 Hz), alpha (8–13 Hz), and beta (13–30 Hz) bands immediately following the initiation of Stroop stimuli; the mean of the Teager energy in each of these three bands; and the wideband EEG signal line-length and number of peaks. These computational features were extracted from the EEG signals on thirteen electrodes during each stimulus presentation and used as inputs to logistic regression, quadratic discriminant analysis, and k-nearest neighbor classifiers. Two complementary analysis methodologies indicated classification accuracies over subjects of around 80% on a balanced dataset for the logistic regression classifier when information from all electrodes was taken into account simultaneously. Additionally, we found evidence that stress responses were preferentially time-locked to stimulus presentation, and that certain electrode–feature combinations worked broadly well across subjects to distinguish stress states.
Robust Depth Estimation for Light Field Microscopy
Authors: Palmieri Luca , Scrofani Gabriele , Incardona Nicolò , Saavedra Genaro , Martínez-Corral Manuel , Koch Reinhard
Published: January 2019

Light field technologies have seen a rise in recent years and microscopy is a field where such technology has had a deep impact. The possibility to provide spatial and angular information at the same time and in a single shot brings several advantages and allows for new applications. A common goal in these applications is the calculation of a depth map to reconstruct the three-dimensional geometry of the scene. Many approaches are applicable, but most of them cannot achieve high accuracy because of the nature of such images: biological samples are usually poor in features and do not exhibit sharp colors like natural scene. Due to such conditions, standard approaches result in noisy depth maps. In this work, a robust approach is proposed where accurate depth maps can be produced exploiting the information recorded in the light field, in particular, images produced with Fourier integral Microscope. The proposed approach can be divided into three main parts. Initially, it creates two cost volumes using different focal cues, namely correspondences and defocus. Secondly, it applies filtering methods that exploit multi-scale and super-pixels cost aggregation to reduce noise and enhance the accuracy. Finally, it merges the two cost volumes and extracts a depth map through multi-label optimization.
Effective Cycle Slip Detection and Repair for PPP/INS Integrated Systems
Authors: Yang Sheng , Li Leilei , Liu Jingbin , Chen Qusen , Ding Xuewen , Sun Hongxing , Wu Yu , Ren Chunhua , Hu Ning
Published: January 2019

Cycle slip (CS) is a primary error source in Precise Point Positioning/Inertial Navigation System (PPP/INS) integrated systems. In this study, an INS-aided CS detection and repair method is presented. It utilizes high-precision INS information instead of a pseudorange to remove the satellite–receiver geometric range in the wide-lane (WL) and ionospheric-free (IF) phase combinations and creates an INS-aided WL (WL-INS) model and an INS-aided IF (IF-INS) model. Since INS information is superior to pseudorange, the INS-aided models have high detection accuracy. However, the effectiveness of INS-aided models cannot persist for a long time because of INS accumulation error. To overcome the disturbance of INS error, improved INS-aided models are proposed. This idea takes advantage of the long wavelength of WL combination and tries to fix WL CS. Once it succeeds, the INS error can be evaluated and removed. The proposed method was tested using land vehicle data, in which simulated cycle slips and signal interruption were introduced. The results show that this method can accurately detect and repair different cycle slips between the continuous Global Positioning System (GPS) epoch. When it comes to the cycle slip after a GPS interruption, the method can also accelerate PPP re-convergence, as it is not affected by the inertial accumulation error.
Real-Time Semantic Segmentation for Fisheye Urban Driving Images Based on ERFNet
Authors: Sáez Álvaro , Bergasa Luis M. , López-Guillén Elena , Romera Eduardo , Tradacete Miguel , Gómez-Huélamo Carlos , del Egido Javier
Published: January 2019

The interest in fisheye cameras has recently risen in the autonomous vehicles field, as they are able to reduce the complexity of perception systems while improving the management of dangerous driving situations. However, the strong distortion inherent to these cameras makes the usage of conventional computer vision algorithms difficult and has prevented the development of these devices. This paper presents a methodology that provides real-time semantic segmentation on fisheye cameras leveraging only synthetic images. Furthermore, we propose some Convolutional Neural Networks(CNN) architectures based on Efficient Residual Factorized Network(ERFNet) that demonstrate notable skills handling distortion and a new training strategy that improves the segmentation on the image borders. Our proposals are compared to similar state-of-the-art works showing an outstanding performance and tested in an unknown real world scenario using a fisheye camera integrated in an open-source autonomous electric car, showing a high domain adaptation capability.
On the Possibility of Using Recycled Mixed Aggregates and GICC Thermal Plant Wastes in Non-Structural Concrete Elements
Authors: Rodríguez Carlos , Sánchez Isidro , Miñano Isabel , Benito Francisco , Cabeza Marta , Parra Carlos
Published: January 2019

Industrial wastes are often used as aggregate in concrete production to promote a more sustainable construction and to reduce production costs. This article presents the results of an experimental campaign on the influence of replacing natural aggregate with several construction and demolition wastes (C&DW) as recycled aggregate, as well as the use of fly ash and slag, wastes produced in Gas Incinerator Combined Cycle (GICC) thermal power plants, in the mix design of non-structural concrete. Different percentages of natural aggregates were substituted with recycled aggregates either coming from construction and demolition wastes, or from the coarse fraction of the slags from thermic plants in the manufacture of concrete. The mechanical properties, capillary water absorption, density, carbonation, chloride ingress and sulphate resistance have been tested. The results show a decrease in properties when C&DW are used. Fine fraction of slag and fly ash has an important advantage, and can even improve the long term properties of concrete prepared with natural aggregates. Coarse fraction of slag as a recycled aggregate generally improves most of the properties of manufactured concretes.
Biological and Physical Effects of Brine Discharge from the Carlsbad Desalination Plant and Implications for Future Desalination Plant Constructions
Authors: Lykkebo Petersen Karen , Heck Nadine , G. Reguero Borja , Potts Donald , Hovagimian Armen , Paytan Adina
Published: January 2019

Seawater reverse osmosis (SWRO) desalination is increasingly used as a technology for addressing shortages of freshwater supply and desalination plants are in operation or being planned world-wide and specifically in California, USA. However, the effects of continuous discharge of high-salinity brine into coastal environments are ill-constrained and in California are an issue of public debate. We collected in situ measurements of water chemistry and biological indicators in coastal waters (up to ~2 km from shore) before and after the newly constructed Carlsbad Desalination Plant (Carlsbad, CA, USA) began operations. A bottom water salinity anomaly indicates that the spatial footprint of the brine discharge plume extended about 600 m offshore with salinity up to 2.7 units above ambient (33.2). This exceeds the maximum salinity permitted for this location based on the California Ocean Plan (2015 Amendment to Water Quality Control Plan). However, no significant changes in the assessed biological indicators (benthic macrofauna, BOPA-index, brittle-star survival and growth) were observed at the discharge site. A model of mean ocean wave potential was used as an indicator of coastal mixing at Carlsbad Beach and at other locations in southern and central CA where desalination facilities are proposed. Our results indicated that to minimize environmental impacts discharge should target waters where a long history of anthropogenic activity has already compromised the natural setting. To ensure adequate mixing of the discharge brine desalination plants should be constructed at high-energy sites with sandy substrates, and discharge through diffusor systems.
A qualitative study on learning organization as an essential action lowering skill mismatch effects
Authors: Dewi Yustina Erti Pravitasmara , Dwiatmadja Christantius , Suharti Lieli
Published: January 2019

Skill mismatch phenomenon has been discussed in various scientific journals as it is proven to lower productivity and weaken competitiveness. Understanding the skill mismatch effect on competitiveness leads to a new way of thinking about how to manage skill mismatch for the organization sustainability. Previous researches recognize the concept of organizational management in order to be able to compete by creating a learning organization environment. Adhering to the learning organization principles, individuals within the organization should increase their capacity and thus minimizing the negative effects caused by the skill mismatch effects. This study chooses hotel business as an observation unit as the hotel is such a storefront of tourism in Indonesia. The research was done in a descriptive-qualitative manner and used five-stars hotel in Indonesia. The results supported the previous researches on learning organization and training prior to working The findings indicated that in the process of organizational learning in the hospitality business, it was originally started with the involvement of the company or institutionalizing. The originality of this research is presented in the use of the 4i framework in organizational learning to evaluate the skill mismatch.
Qatar Exoplanet Survey: Qatar-7b—A Very Hot Jupiter Orbiting a Metal-rich F-Star
Authors: Alsubai Khalid , Tsvetanov Zlatan I. , Latham David W. , Bieryla Allyson , Pyrzas Stylianos , Mislis Dimitris , Esquerdo Gilbert A. , Esamdin Ali , Liu Jinzhong , Ma Lu , Bretton Marc , Pallé Enric , Murgas Felipe , Vilchez Nicolas P. E. , Morton Timothy D. , Parviainien Hannu , Montañes-Rodriguez Pilar , Narita Norio , Fukui Akihiko , Kusakabe Nobuhiko , Tamura Motohide
Published: January 2019

We present the discovery of Qatar-7b—a very hot and inflated giant gas planet orbiting close to its parent star. The host star is a relatively massive main-sequence F-star with mass and radius

and

, respectively, at a distance d = 726 ± 26 pc, and an estimated age ∼1 Gyr. With its orbital period of P = 2.032 days, the planet is located less than five stellar radii from its host star and is heated to a high temperature T
eq ≈ 2100 K. From a global solution to the available photometric and radial velocity observations, we calculate the mass and radius of the planet to be

 = 1.88 ± 0.25

and

 = 1.70 ± 0.03

, respectively. The planet radius and equilibrium temperature put Qatar-7b in the top 6% of the hottest and largest known exoplanets. With its large radius and high temperature, Qatar-7b is a valuable addition to the short list of targets that offer the best opportunity for studying their atmospheres through transmission spectroscopy.
Photometric and Spectral Observations of the W UMa Stars NSVS 4161544 and 1SWASP J034501.24+493659.9. GAIA Challenges
Authors: Kjurkchieva Diana , Stateva Ivanka , Popov Velimir A. , Marchev Dragomir
Published: January 2019

Photometric and spectral observations of the W UMa binaries NSVS 4161544 and 1SWASP J034501.24+493659.9 with periods of around 8 hr are presented. The simultaneous light-curve and radial-velocity-curve solutions revealed that the two targets have over-contact configurations, and their components undergo partial eclipses. The derived parameters of NSVS 4161544 are: mass ratio q = 3.377, orbital inclination i = 65.00, temperatures T
1 = 6016 K and T
2 = 5726 K, masses M
1 = 0.43

and M
2 = 1.47

radii R
1 = 0.74

and R
2 = 1.28

luminosities L
1 = 0.64

and L
2 = 1.51

. The derived parameters of 1SWASP J034501.24+493659.9 are: mass ratio q = 2.378, orbital inclination i = 60.30, temperatures T
1 = 6514 K and T
2 = 6494 K, masses M
1 = 0.275

and M
2 = 0.654

radii R
1 = 0.693

and R
2 = 1.012

luminosities L
1 = 0.775

and L
2 = 1.632

. Hence, the masses of the 1SWASP J034501.24+493659.9 components are quite small for the rest global parameters, and their sum of 0.93

is slightly below the lower mass limit of 1.0–1.2 M
⊙ for the contact binaries. The calculated distance of NSVS 4161544 almost coincides with that determined by GAIA. The calculated distance of 1SWASP J034501.24+493659.9 is considerably smaller than the GAIA value that is most likely due to overestimation of the interstellar extinction to this star from the Galactic disk.
The Massively Accreting Cluster A2029
Authors: Sohn Jubee , Geller Margaret J. , Walker Stephen A. , Dell’Antonio Ian , Diaferio Antonaldo , Rines Kenneth J.
Published: January 2019

We explore the structure of galaxy cluster A2029 and its surroundings based on intensive spectroscopy along with X-ray and weak lensing observations. The redshift survey includes 4376 galaxies (1215 spectroscopic cluster members) within 40′ of the cluster center; the redshifts are included here. Two subsystems, A2033 and a southern infalling group (SIG), appear in the infall region based on the spectroscopy, as well as on the weak lensing and X-ray maps. The complete redshift survey of A2029 also identifies at least 12 foreground and background systems (10 are extended X-ray sources) in the A2029 field; we include a census of their properties. The X-ray luminosities (L

X
)–velocity dispersions (

) scaling relations for A2029, A2033, SIG, and the foreground/background systems are consistent with the known cluster scaling relations. The combined spectroscopy, weak lensing, and X-ray observations provide a robust measure of the masses of A2029, A2033, and SIG. The total mass of the infalling groups (A2033 and SIG) is ∼60% of the M
200 of the primary cluster, A2029. Simple dynamical considerations suggest that A2029 will accrete these subsystems in the next few Gyr. In agreement with simulations and other clusters observed in a similar redshift range, the total mass in the A2029 infall region is comparable to the A2029 M
200 and will mostly be accreted in the long-term future.
The Deposition of Heavy Elements in Giant Protoplanetary Atmospheres: The Importance of Planetesimal–Envelope Interactions
Authors: Valletta Claudio , Helled Ravit
Published: January 2019

In the standard model for giant planet formation, the planetary growth begins with accretion of solids, followed by a buildup of a gaseous atmosphere as more solids are accreted and, finally, by rapid accretion of gas. The interaction of the solids with the gaseous envelope determines the subsequent planetary growth and the final internal structure. In this work we simulate the interaction of planetesimals with a growing giant planet (proto-Jupiter) and investigate how different treatments of the planetesimal–envelope interaction affect the heavy-element distribution and the inferred core mass. We consider various planetesimal sizes and compositions, as well as different ablation and radiation efficiencies and fragmentation models. We find that in most cases the core reaches a maximum mass of ∼2 M
⊕. We show that the value of the core’s mass mainly depends on the assumed size and composition of the solids, while the heavy-element distribution is also affected by the fate of the accreted planetesimals (ablation/fragmentation). Fragmentation, which is found to be important for planetesimals >1 km, typically leads to enrichment of the inner part of the envelope, while ablation results in enrichment of the outer atmosphere. Finally, we present a semianalytical prescription for deriving the heavy-element distribution in giant protoplanets.
Detection of a Drag Force in G2's Orbit: Measuring the Density of the Accretion Flow onto Sgr A* at 1000 Schwarzschild Radii
Authors: Gillessen S. , Plewa P. M. , Widmann F. , von Fellenberg S. , Schartmann M. , Habibi M. , Jimenez Rosales A. , Bauböck M. , Dexter J. , Gao F. , Waisberg I. , Eisenhauer F. , Pfuhl O. , Ott T. , Burkert A. , de Zeeuw P. T. , Genzel R.
Published: January 2019

The Galactic Center black hole Sgr A* is the archetypical example of an underfed massive black hole. The extremely low accretion rate can be understood in radiatively inefficient accretion flow models. Testing those models has proven to be difficult due to the lack of suitable probes. Radio and submillimeter polarization measurements constrain the flow very close to the event horizon. X-ray observations resolving the Bondi radius yield an estimate roughly four orders of magnitude further out. Here, we present a new, indirect measurement of the accretion flow density at intermediate radii. We use the dynamics of the gas cloud G2 to probe the ambient density. We detect the presence of a drag force slowing down G2 with a statistical significance of ≈9σ. This probes the accretion flow density at around 1000 Schwarzschild radii and yields a number density of ≈4 × 103 cm−3. Self-similar accretion models where the density follows a power-law radial profile between the inner zone and the Bondi radius have predicted similar values.
L’intégration sociale étudiante
Authors: Berthaud Julien
Published: January 2019

La socialisation au milieu universitaire constitue un enjeu à la fois pour les étudiants qui sortent de l’enseignement secondaire et pour les établissements soucieux du bien-être et de la réussite des étudiants qu’ils accueillent. Cet article propose une (re)définition du concept d’intégration sociale appliqué à la population étudiante, et en étudie les conditions et les effets pour des étudiants de premier cycle universitaire. Les analyses révèlent que de nombreux facteurs interviennent dans l’explication des différences d’intégration entre étudiants, et qu’une socialisation réussie constitue un gage supplémentaire d’une plus grande réussite académique pour certains étudiants.
L’invitation au voyage
Authors: Delespierre Adrien
Published: January 2019

À la suite de plusieurs études analysant les voyages éducatifs comme une dimension constitutive du style de vie des classes dominantes, cet article examine la manière dont les hiérarchies sociales entre les grandes écoles d’ingénieurs se manifestent à travers les pratiques de mobilité internationale. L’accroissement des périodes de formation à l’étranger recouvre des formes d’expatriation très inégalement valorisées, ce qui conforte la prééminence des institutions au recrutement social et scolaire le plus élitiste. Les disparités sociales se retrouvent au sein même des écoles prestigieuses, les opportunités internationales ouvertes aux élèves dépendant étroitement des capitaux culturels et économiques qu’ils héritent de leur milieu familial.
Sauvé par les sciences humaines
Authors: Dietrich-Ragon Pascale
Published: January 2019

À partir du cas du cas de Seif, jeune homme de 21 ans issu de l’immigration qui a vécu dans une cité de la banlieue parisienne, cet article analyse le rôle que peut jouer la lecture d’ouvrages ou de textes de sciences humaines dans les situations de crise et de vulnérabilité. Confronté à un conflit familial aigu, Seif a fait de cette pratique une arme pour comprendre sa situation et pour tenter de se sauver lui-même ainsi que sa famille. Parallèlement, cela a changé ses relations sociales et sa manière d’être au monde. Il s’agit, à travers cette étude de cas, d’explorer le rapport aux sciences humaines de ces lecteurs particuliers qui cherchent dans les mots et les idées des solutions à leurs problèmes. Placés en « situation d’urgence », ils peuvent utiliser ces connaissances comme un véritable guide pour l’existence, ce recours étant en même temps révélateur de l’individualisation des problèmes sociaux.
Blessures d’amour : guérir en couple
Authors: Natter Lolita
Published: January 2019

La thérapie relationnelle Imago propose de travailler sur les blessures affectives de l’enfance des deux partenaires au sein même de leur couple. Le choix du partenaire romantique ayant été fait en fonction de l’image inconsciente de l’amour familier, ce même partenaire détient probablement les clés de guérison et de maturation personnelle. L’article décrit la mise en place du dialogue intentionnel Imago comme une voie pour la construction d’un lien conscient.
Arthur Rimbaud et Paul Verlaine. Les « Des-Astres » de l’Amour
Authors: Le Fourn Jean-Yves
Published: January 2019

L’amour tragique et « d’hainamoration » entre Verlaine et Rimbaud, fut un amour de débauche, de transgressions multiples jusqu’au drame du 10 Juillet 1873 ou Verlaine tira sur Rimbaud à Bruxelles. De cette « journée en enfer », la vie fut pour Verlaine, par la suite une longue déchéance. Pour Rimbaud celui-ci arrêta de la poésie pour « errer » en quête d’un père absent et manquant, et vers son « adultité ».
Lire Le Commerce et le Gouvernement : contre l’interprétation néolibérale de Condillac
Authors: Bertrand Aliénor
Published: January 2019

À la fin du siècle dernier, Le Commerce et le Gouvernement a été l’objet d’une interprétation devenue dominante, qui érige Condillac en précurseur du néolibéralisme. Cet article étudie la succession des biais historiques, méthodiques et philosophiques qui ont conduit à transformer la définition condillacienne de la valeur en théorie de la mathématisation des préférences en fonction des utilités marginales des marchandises. Alors que Condillac est animé par l’ambition explicite de bien faire la langue économique, cette interprétation omet de réinscrire ce texte dans la visée d’ensemble de l’œuvre, qui, dès l’ Essai sur l’origine des connaissances humaines , se voue à étudier les conditions logiques et historiques de l’institution des langues. Or  Le Commerce et le Gouvernement affirme qu’une langue économique exacte est une analyse du jugement de valeur. Condillac, auteur d’une Logique , d’un Art de penser et d’un Art de raisonner , donne au moins deux ou trois définitions différentes du jugement. Aucune ne peut créditer la réduction du jugement de valeur à un calcul sur les prix. Ce déplacement majeur repose sur un vice argumentatif analysé par Condillac lui-même comme le propre de certains faux systèmes, la « réalisation » des abstractions, soit, ici, la transformation d’une réflexion sur les principes du jugement de valeur en relation d’équivalence arithmétique entre des choses, les marchandises. En l’occurrence, cette erreur logique se combine aussi à une illusion d’un autre ordre, la confusion des valeurs et des prix, que Le Commerce et le Gouvernement dénonce comme constitutive des sociétés marchandes. Les bénéfices tirés par les auteurs néolibéraux de leur lecture apparaissent ainsi clairement, notamment une narration de l’histoire de l’économie qui minore les œuvres d’Adam Smith et de Karl Marx, et, avec elles, les analyses des liens de la valeur et du travail. Mais, paradoxalement, cet article découvre aussi ce que la critique de Condillac par Marx doit à Say, et invite en définitive à relire  Le Commerce et le Gouvernement  en traquant ce que, dans la langue de Condillac, un « jugement », et un « sujet » peuvent bien signifier.
Tied and Tidy: Closing the Conjunctiva Over Adjustable Sutures
Authors: Kipioti Athina , George Nick D L , Taylor Ruben H
Published: January 2019

ABSTRACT

Background: Adjustable sutures have revolutionized strabismus surgery. Numerous techniques have been described that aim to facilitate postoperative adjustment. Nevertheless, some sort of procedure is always necessary following adjustable suture surgery and has to be arranged within 24 hours. Where no adjustment is required, the muscle needs to be secured at the existing position and the conjunctiva, sometimes left on a loop, has to be tidied up and sutured.

Methods: As fewer than half of the operated on eyes need a final adjustment, we describe a technique whereupon the muscle is left on a loop and the conjunctiva is closed over it with two interrupted polyglactin 910 sutures. If an adjustment is deemed necessary, one of the sutures has to be cut and replaced at the end of the procedure. When the result of squint surgery is satisfactory and no muscle movement is needed, no further manipulation of the conjunctiva is required.

Conclusions: In a series of 17 patients, we have found this technique to be excellent for patient comfort and time efficiency. We have not encountered any muscle slippage. We think that the ease of postoperative management may tend to bias the surgeon against adjustment.

J Pediatr Ophthalmol Strabismus 2004;41:226-229 .
Orbital Subperiosteal Hemorrhage in a Patient With Factor VIII and Factor XII Deficiency
Authors: Oh Joo Youn , Khwarg Sang In
Published: January 2019

Orbital subperiosteal hemorrhage may develop from the orbital extension of a subgaleal hemorrhage and threaten vision. This article describes the case of a patient with factor VIII and factor XII deficiency who had a subgaleal hemorrhage with orbital extension and optic nerve compression following head trauma.

J Pediatr Ophthalmol Strabismus
2004;41:367–368.
Des moines et des sapins : monastères et mise en valeur de la haute chaîne jurassienne au milieu du Moyen Âge
Authors: Chevassu Valentin
Published: January 2019

Les monastères médiévaux jurassiens ont été considérés traditionnellement comme étant à l’origine des premières initiatives de peuplement et de défrichement de ce massif montagneux, théorie qui semble aujourd’hui devoir être largement nuancée. Dans le secteur du Jura central, la synthèse de données archéologiques, paléoenvironnementales et textuelles permet de décrire l’évolution du paysage autour des monastères de Morteau, Montbenoît, Mont-Sainte-Marie et Mouthe. Ces quatre établissements sont fondés aux xie et xiie siècles dans les vallées montagnardes de la région de Pontarlier. Si ces espaces sont exploités par l’homme dès la protohistoire, la période d’implantation des monastères coïncide avec une nette recrudescence de l’agriculture et du pastoralisme. Dans un second temps, la période moderne amène une intensification supplémentaire de l’impact anthropique, avec le développement d’activités spécialisées, encouragées notamment par les seigneuries monastiques.
L’envers de la liberté
Authors: Avez Peggy
Published: January 2019

Les désaccords philosophiques dont l'idée de liberté fait constamment l'objet ne font-ils pas signe, au-delà des querelles métaphysiques, vers la dynamique réelle de la liberté - et indissociablement de son idée - dans ses productions socio-historiques et, par conséquent, jusque dans ses négations ?

Cet essai propose un travail généalogique autour du mot « liberté » : les significations successivement attribuées à ce concept sont essentiellement reliées à des expériences d'aliénation, dont elles constituent des projections en positif, idéalisées. Articulant histoire de la philosophie et philosophie sociale, Peggy Avez explore plusieurs configurations - la peur de l'exil dans l'Antiquité, la conception chrétienne de l'homme endetté, la crainte asservissante d'autrui pour les modernes et la peur contemporaine de l'objectivation unilatérale - chacune forgeant des significations de la liberté comme autochtonie, rédemption, sécurité et réinsertion du sens.

De la « dialectique négative » de l'idée de liberté - ce dont les idéaux de liberté veulent émanciper l'homme constitue ce qui le conduit à s'aliéner - à la dialectique de la praxis - dans laquelle l'idée de liberté devient mythe et mobilise des mécanismes psychologiques à la faveur desquels l'aspiration à l'émancipation se mue en désir d'adaptation et d'obéissance -, l'auteure suit comme fil directeur l'histoire de la philosophie, qui fournit des éléments fondamentaux non seulement pour réveiller les sens du terme « liberté », confusément sédimentés dans notre usage discursif, mais aussi pour comprendre le rôle essentiel de l'idée de liberté dans l'imaginaire social.
Savoirs et philosophie à Paris dans la première moitié du XVIIe siècle
Authors: Mazauric Simone
Published: January 2019

La première moitié du XVIIe siècle a vu naître dans la plupart des pays de l'Europe occidentale la nouvelle physique mécaniste, dont la construction est notamment associée aux noms de Galilée et de Descartes. Mais la constitution de la science moderne n'a pas signifié pour autant la disparition des modes de pensée hérités d'une histoire plus ou moins lointaine ; pas plus que son avènement ne s'est accompli sans hésitations ni tâtonnements.

Les comptes rendus des conférences hebdomadaires du Bureau d'adresse organisées de 1633 à 1642 par Théophraste Renaudot, médecin de son état, fondateur de la Gazette et protégé du Cardinal de Richelieu, offrent par excellence le moyen de prendre la mesure du foisonnement et de la richesse de la culture savante de leur époque comme de la complexité des phénomènes de la transition intellectuelle dont ces conférences ont été contemporaines.

Source unique en leur temps, les cinq volumes des Centuries du Bureau d'adresse offrent en outre un témoignage incomparablement précis sur les académies du premier XVIIe siècle, souvent ignorées au profit de leur contemporaine, l'Académie française, ou de leurs héritières comme l'Académie royale des sciences, qui furent des institutions officielles de la monarchie.

Le livre de Simone Mazauric nous donne à découvrir aussi bien la vie quotidienne de l'académie de Renaudot que les savoirs dont celle-ci fut un lieu de diffusion. Les procès-verbaux publiés des conférences du Bureau d'adresse deviennent ainsi un moyen d'accès privilégié à la connaissance des modèles intellectuels de l'âge baroque comme ils portent témoignage sur la crise d'une pensée qui s'est accomplie sur le fond d'une mutation sociale et politique décisive.
A Comparison of Three Evolutionary Algorithms for the Optimization of Building Design
Authors: Prada Alessandro , Gasparella Andrea , Baggio Paolo
Published: January 2019

In building design, the need of optimization algorithms is considerably increasing due to the requirements of enhancing the overall performances, cost and sustainability objectives. An evolutionary algorithm coupled with building simulation code is often used. However, this approach is not widespread in actual application due to the high number of expensive simulation runs required by evolutionary algorithms. For this reason, the selection of an efficient and effective optimization algorithm becomes a key aspect in building design. In the literature there are several works analyzing the performance of different optimization algorithms, most of them by comparing the results obtained for the optimization of analytical test functions. However, there are no evidence-based studies deepening the efficiency and efficacy of these methods by comparing against the true solution of the discrete optimization problems on building design. This study compares the number of cost function evaluations and the percentage of the actual Pareto solutions of three algorithms used for the evaluation of the optimal refurbishment of three reference buildings for which the actual Pareto front is known through a brute-force approach.