bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Soil-Pile-Structure Interaction on Behaviour of Offshore Jacket Structure
Authors: George S.R. , Verma A.K. , Desai A.N. , Dalwadi B.R. , Iyer K.K.R.
Published: December 2022

Offshore jacket structures are generally supported on pile foundations. Studies have evaluated the effect of soil-pile interaction on design of foundation; however, effect of soil-pile-structure interaction on behaviour of jacket structure has received little attention. Hence, present study focuses on understanding the influence of soil conditions, soil-pile interaction and foundation modeling approach on deformation characteristics and member forces of jacket structure. Linear static analysis on a typical 4-legged battered jacket structure is performed using STAAD Pro., subjected to dead/live loads and environmental loads. The water depth of 120 m and wave heights of 5 m, 10 m and 15 m are considered for this study. Morison’s equation considering Stokes 5th order wave theory is used for calculation of wave forces on jacket structure. The supports are modelled as skirted pile groups. The piles are represented by springs, with stiffness calculated using soil-pile interaction analysis. The soil conditions used in the study are varied for different compaction states of sand and different consistency states of clay and various parameters such as lateral/vertical deflection, support reactions, forces in leg, beams and bracings have been compared. It is concluded that ignoring soil-pile-structure interaction during analysis of jacket structure would underestimate the lateral/vertical deflections, support reactions, shear force and bending moment for leg, and axial forces in beam and plan bracing of the structure. No substantial impact of the interaction on other member forces is observed. Jacket structure founded on clayey soil exhibits higher deformation and member forces as compared to sand in general. The study is expected to help structural engineers in adopting an appropriate modelling approach, considering soil-pile-structure interaction, to obtain more realistic response for jacket structures.
A Soil-Structure Interaction Study using Sustainable Structural Fill below Foundations
Authors: Dalal P.H. , Patil M. , Dave T.N. , Iyer K.K.R.
Published: December 2022

Structural fill is utilized to improve the bearing capacity and reduce settlement below foundations supported on weak soils or when foundations are supported on filled up soil. The present study evaluates the potential application of municipal solid waste finer fraction (MSW-FF) as a sustainable structural fill material. The finer fraction constitutes significant proportion of old landfill waste in cities, and do not easily find applications as compared to the other fraction of old waste. The present work determines the engineering properties of MSW-FF. A detailed assessment has also been carried out to evaluate the bearing capacity, settlement and modulus of subgrade reaction for the shallow foundation of different sizes and shapes resting on (a) soil with low subgrade modulus and (b) soil improved with a layer of MSW-FF as structural fill. A soil-structure interaction analysis has also been carried out by utilizing STAAD Pro. software, to understand the effect of soil and foundation stiffness on the foundation design parameters, viz., base pressure, settlement, bending moment and shear stress in shallow foundations for both cases (natural soil and with MSW-FF as structural fill). The comparison of different foundation systems resting on soil improved with MSW-FF structural fill layer and soil with low subgrade modulus has been presented to demonstrate the efficacy of MSW-FF as a suitable structural fill material. From the soil-structure interaction analysis, it is observed that the effect of soil subgrade modulus on foundation base pressure and settlement is prominent, while having a negligible effect of bending moment and shear stress in the foundation. Further, the relative stiffness of foundation and soil has a significant effect on the foundation design parameters. The study results are quite encouraging with respect to the potential of utilizing MSW-FF as a sustainable structural fill and put forward a new and promising alternate material for application in different infrastructure projects.
Numerical Analysis of Behavior of Geo-Synthetically Reinforced Slopes Under Seismically Active Conditions
Authors: Bhat Ilyas , Rupali S. , Kumar Arvind , Senthil K.
Published: December 2022

Slopes are the unsupported inclined soil mass. Stability of slopes has always been a governing factor for carrying out construction on slopes. Both static and dynamic loads can cause failure to a slope yet there are considerate methods to determine the bearing capacity and factor of safety for slopes under static loads while as dynamic loads specifically earthquake loads are generally unpredictable. This paper checks effect of installation of geogrid layers in soil slopes under seismic loads. This study has been carried out using Finite Element Based Software PLAXIS incorporating CD-ROM (SMC) file of WNW OF FERNDALE, CA on 10th March 2014.The model was scaled as 1x .5 x .5 m with slope angle of 32? and a model footing of 50 mm which was loaded suitably. During the study numerical results of deformation compared with experimental results. It was found that addition of geogrid layers enhanced the factor of safety upto appreciable extent. Optimum depth and optimum number of geogrid layers were also determined. The percentage increase in factor of safety at different levels of installation was also recorded.
4D Schedule Optimization for Project Monitoring of Existing Educational Building
Authors: Patel Bhavya , Patel Nisarg , Patel Akash , Patel Sameer
Published: December 2022

Project management is an important domain, especially in the allocation of resources and smooth operation with an assigned budget. To successfully complete a project, it is important to follow effective ways to use available tools, technique, and methods, considering present technology and management. Recently, Building Information Modelling is one of the techniques which creates, manage, or generate a model by taking physical and functional characteristics of building by using digital presentations. Term 4D modeling refers to fourth dimension that associates the 3D model of any construction project with the planned schedule and provides visualization of the actual sequence of construction activities. The study was carried out to understand the uses and benefits of BIM for better proper functioning of the project in accordance with the project schedule. The objective of the study is to minimise the challenge associated with traditional or conventional scheduling process of construction sequences and misunderstanding brought by the lack of visualization. To fulfill the objective of the study, the uses of different dimensions of Building Information Modelling (2D, 3D and 4D) for preconstruction and construction phase was identified. Then a prototype 4D Building Information Model was created and the BIM based schedule was integrated with it and studied. The software used for scheduling, 3D modelling and 4D simulation are Primavera, Autodesk Revit, and Autodesk Navisworks respectively.
Dynamic Response Reduction of Reinforced Concrete Structure using Tuned Mass Damper and Tuned Liquid Damper
Authors: Sundar K.P.Shiyam , Sebastian Johny , Shrimali M.K. , Bharti S.D.
Published: December 2022

Damping devices are used to reduce the dynamic response of a structure by energy dissipation. Common types of damping devices are fluid viscous dampers, tuned mass dampers, and tuned liquid dampers. This project aims to study the effectiveness of TMD and TLD in controlling the response of the structure when it is subjected to acceleration records of different earthquakes. A 20-storey reinforced concrete bare frame structure has been subjected to two earthquake acceleration records with and without dampers in SAP 2000. The dampers are modelled using link elements. The structure is attached with TMD and TLD having a mass of 0.5%, 2%, 4%, 6%, 8% and 10% of the modal mass. The analysis procedure used is nonlinear modal time history analysis (FNA). The variation in base shear and top storey displacement has been obtained and plotted.
Numerical Analysis of Chevron Braced Frames retrofitted using Vertical and Diagonal Brace Members
Authors: Narayan . , Pathak KrishnaKant
Published: December 2022

This article discusses about the retrofitting of the existing chevron braced frames, constructed before the induction of the concept of thespecial concentrically braced frames (SCBF) braced frames. Two arrangements of upgraded bracing were developed; one configuration was inspired by X-brace and Y brace while the other was inspired by Zipper brace and Y-brace. Both arrangements resulted into unique dual half Y-brace (DHYB). The numerical analysis was done by using Abaqus software. The outcomes of the analysis for studying the behaviour of the braced frame after retrofitting were the hysteretic behaviour, plastic energy dissipation and the beam deflection. In most of the cases, retrofitting using the above mentioned technique provided a more stable and balanced hysteretic behaviour, improved energy dissipation, reduced beam deflection. This method of retrofitting would cause minimal structural intervention and least disruption to the occupants.
Semi-active Groundhook Control of Offshore Tension Leg Platforms Using TMD with Optimized Parameters and MR Damper Under Regular waves
Authors: Patra Suryasish , Das Diptesh
Published: December 2022

The motivation and objective of the present study are to propose a semi-active control system for offshore tension leg platforms (TLPs) to mitigate the vibrations induced by regular wave loads. State-of-the-art indicates that not much work is reported on semi-active control of offshore TLPs considering potential nonlinearities for multiple hazards using a control algorithm, which is robust against uncertainties. A displacement based groundhook (DB-GH) control algorithm using tuned mass damper (TMD) and magneto-rheological (MR) damper is employed for the semi-active controller because of its robustness against parametric uncertainties and reliability. Optimized parameters of the semi-active TMD (SATMD) are obtained using constrained nonlinear optimization to achieve the best control performance. The flexibility of the groundhook control lies in its simplicity of implementation, computational efficiency and its demand for only two sensors in order to achieve the calculations of control forces. The scope of the present study is to demonstrate the efficiency of the proposed controller and investigate the effects of different influencing parameters. A TLP, reported in literature, is taken as an illustrative example. The non-linearly coupled dynamic responses of the structure-damper system is analysed and solved in time domain using MATLAB SIMULINK. The results show the SATMD performs quite satisfactorily in reducing the responses of the TLP in different critical conditions.
Nonlinear Seismic Analysis of RC Elevated Liquid Storage Tanks
Authors: Waghmare M.V. , Madhekar S.N. , Matsagar V.A.
Published: December 2022

Liquid storage tanks are strategically important due to their essential requirement of service in the post-earthquake situation. Numerical modeling of the liquid storage tank needs special attention and cannot be done in the same manner as that of the conventional buildings. In the present paper, a numerical simulation of the RC elevated liquid storage tank is presented. The staging of the tank is modeled as a multi-degree freedom system, and the container with contained liquid is modeled as a two-mass system. Free vibration analysis of the tank is carried out, and mode shapes are extracted. Further, to study the seismic response of the tank, nonlinear time history analysis is carried out. The tank is subjected to time histories of real earthquake ground motions. The varying level of the liquid in the container is another characteristic feature of tanks. The filled condition of the tank is taken into account by considering the aspect ratio (S), defined as the ratio of height of the liquid to the radius of the container. The response of the tanks with two different aspect ratios viz. 0.5 (broad) and 2.0 (slender) is studied. The linear modal analysis also carried out to understand the significance of nonlinear analysis, particularly in liquid storage tanks. Displacement, velocity, and acceleration response at the bracing levels, as well as at container levels, are obtained. Additionally, the base shear response is also obtained. The effect of aspect ratio on the free vibration analysis and the seismic response of the tanks are presented. Liquid storage tanks are special structures that have typically low fundamental natural frequencies. The nonlinear time history response of the tank showed that the higher displacement and velocity response occurs at the convective level. It is found that the linear modal analysis significantly underestimates the response of the liquid storage tank.
Seismic (effect on) time history analysis for cable-stayed suspension hybrid bridge considering different geometrical configuration for far field earthquakes
Authors: Gabra J.H. , Desai A.K.
Published: December 2022

To increase the maximum span of cable-stayed bridges, Uwe Starossek has developed a modified statical system. The basic idea of this new concept is the use of pairs of inclined pylon legs that spread out longitudinally from the foundation base or from the girder level. Spread-pylon cable-stayed bridge has distinct advantage like reduction of sag of cables and oscillation of cable during earthquake over traditional cable-stayed bridges. Spread-pylon also improves seismic performance of deck during strong ground motion. Here in this paper dynamic behaviour of cable stayed suspension Hybrid bridge with different structural configuration with seismic loading was studied.
The primary aim , here, is to present response to Seismic effect on Cable stayed Bridges with different cable system taking under consideration SSI.It is evidently clear that Soil Foundation Structure Interaction relies greatly on various factors such as soil and its properties, manner and type of structure and/or its foundation.. In this paper , the emphasis is on the simplified model and foundation on piles. For the modelling author has used SAP2000 software. The study includes the response of the bridge modelled towards variation in the cable system under consideration of SSI. A bridge similar to that of Bridge at Ling Ding Strait China is taken as a reference and 6 models are created with variation in cable system ( ranging from original cable stayed bridge to suspension type, composite bridge and cable stayed suspension hybrid bridge). Soil modeling is done using the spring and dashpots ( Kelvin element) for simulation of SSI effects.The results observed that effects of SSI has a substantial impact on selection of system of cables and the pylon leg inclination for any Cable- Stayed- Suspension Hybrid Bridge(CSSHB)
Automated Construction of Structures using 3D Printing: A Review
Authors: Vairagade Suraj , Kumar Narendra , Singh RaviPratap , Tyagi Mohit
Published: December 2022

The recent advances in 3D printing techniques from past one decade in terms of materials development, product evolvement methods, industry 4.0, technological up-gradations, manpower free constructions, customised production, waste minimization, freedom from designs at an affordable cost. 3D printing processes are extensively contributing in the field of structural industry. To meet the fast-growing demand of the humans there is a need to understand the concepts and in-depth knowhow of 3D printing processes. The technological developments of 3DP to infrastructure domain are still untouched zone worldwide. It is because of lesser projects successfully carried out since its inception. The article presents insights of additive manufacturing processes and its applicability to the construction industry. In the construction industry, 3D printing has not yet reached the point of commercial availability at global level. Fewer number of 3DP experiments for large-scale buildings can be discovered in the literature. A critical analysis of past and present literature studies is conducted worldwide and also investigated the potential benefits of additive manufacturing processes to construction industry. This article's unique contribution is its examination of the many uses for 3D printing in the construction industry, as well as the advances in technology that have made this possible.
The Cosmic Telescope That Lenses the Sunburst Arc, PSZ1 G311.65–18.48: Strong Gravitational Lensing Model and Source Plane Analysis*
Authors: Sharon Keren , Mahler Guillaume , Rivera-Thorsen T. Emil , Dahle Håkon , Gladders Michael D. , Bayliss Matthew B. , Florian Michael K. , Kim Keunho J. , Khullar Gourav , Mainali Ramesh , Napier Kate A. , Navarre Alexander , Rigby Jane R. , Remolina González Juan David , Sharma Soniya
Published: December 2022

We present a strong-lensing analysis of the cluster PSZ1 G311.65−18.48, based on Hubble Space Telescope imaging, archival VLT/MUSE spectroscopy, and Chandra X-ray data. This cool-core cluster (z = 0.443) lenses the brightest lensed galaxy known, dubbed the “Sunburst Arc” (z = 2.3703), a Lyman continuum (LyC) emitting galaxy multiply imaged 12 times. We identify in this field 14 additional strongly lensed galaxies to constrain a strong-lens model and report secure spectroscopic redshifts of four of them. We measure a projected cluster core mass of M(<250 kpc) =

2.93

−
0.02

+
0.01

×

10

14

M
⊙. The two least magnified but complete images of the Sunburst Arc’s source galaxy are magnified by ∼13×, while the LyC clump is magnified by ∼4–80×. We present time delay predictions and conclusive evidence that a discrepant clump in the Sunburst Arc, previously claimed to be a transient, is not variable, thus strengthening the hypothesis that it results from an exceptionally high magnification. A source plane reconstruction and analysis of the Sunburst Arc finds its physical size to be 1 × 2 kpc and that it is resolved in three distinct directions in the source plane, 0°, 40°, and 75° (east of north). We place an upper limit of r ≲ 50 pc on the source plane size of unresolved clumps and r ≲ 32 pc for the LyC clump. Finally, we report that the Sunburst Arc is likely in a system of two or more galaxies separated by ≲6 kpc in projection. Their interaction may drive star formation and could play a role in the mechanism responsible for the leaking LyC radiation.
Multiwavelength Observations of MWC 297: Constraints on Disk Inclination and Mass Outflow
Authors: Vacca William D. , Sandell Göran
Published: December 2022

MWC 297 is a young, early-type star driving an ionized outflow and surrounded by warm, entrained dust. Previous analyses of near- and mid-IR interferometric images suggest that the emission at these wavelengths arises from a compact accretion disk with a moderate (i < 40°) inclination. We have obtained 5–40 μm images of MWC 297 with FORCAST on SOFIA, as well as near-infrared spectra acquired with SpeX on the IRTF and radio data obtained with the VLA and BIMA, and supplemented these with archival data from Herschel/PACS and SPIRE. The FORCAST images, combined with the VLA data, indicate that the outflow lobes are aligned nearly north–south and are well separated. Simple geometrical modeling of the FORCAST images suggests that the disk driving the outflow has an inclination of 55° ± 5°, in disagreement with the results of the interferometric analyses. Analysis of the SpeX data, with a wind model, suggests the mass-loss rate is on the order of

6.0

±

1.7

3.7

×

10

−
7

M

⊙

yr

−
1

and the extinction to the source is

A

V

∼
8.1

±

1.5

2.5

mag. We have combined our data with values from the literature to generate the spectral energy distribution of the source from 0.35 μm to 6 cm and estimate the total luminosity. We find the total luminosity to be about 7900 L
⊙, if we include emission from an extended region around the star, only slightly below that expected for a B1.5V star. The reddening must be produced by dust along the line of sight, but distant from the star.
Near-infrared Spectroscopy of a Massive Young Stellar Object in the Direction toward the Galactic Center: XCN and Aromatic C–D Features
Authors: Onaka Takashi , Sakon Itsuki , Shimonishi Takashi
Published: December 2022

We report near-infrared (2.5–5 μm) long-slit (∼30″) spectroscopy of a young stellar object in the direction toward the Galactic center with the Infrared Camera on board the AKARI satellite. The present target is suggested to be AFGL 2006 based on its very red color and close location. The spectra show strong absorption features of H2O and CO2 ices, and emission of H i Brα recombination line and the 3.3 μm band, the latter of which originates from polycyclic aromatic hydrocarbons (PAHs) or materials containing PAHs. The spectra show a broad, complex absorption feature at 4.65 μm, which is well explained by a combination of absorption features of CO ice, CO gas, and XCN, and H i Pfβ emission. The spectra also indicate excess emission at 4.4 μm. The characteristics of the spectra suggest that the object is a massive young stellar object. The XCN feature shows a good correlation with the Brα emission, suggesting that the photolysis by ultraviolet photons plays an important role in the formation of the XCN carriers, part of which are attributed to OCN−. The 4.4 μm emission shows a good correlation with the 3.3 μm PAH emission, providing supporting evidence that it comes from the aromatic C–D stretching vibration. The formation of OCN− is of importance for the formation process of prebiotic matter in the interstellar medium (ISM), while the detection of aromatic C–D emission provides valuable information on the deuteration process of PAHs in the ISM and implications on the hiding site of the missing deuterium in the ISM.
Exact Shearing Flow Magnetized Hybrid Kinetic Equilibria with Inhomogeneous Temperature
Authors: Malara F. , Settino A. , Perrone D. , Pezzi O. , Guzzi G. , Valentini F.
Published: December 2022

Magnetized plasmas with shearing flows are found in many natural contexts, such as around Earth’s magnetopause. In collisionless plasmas where physical quantities vary on a scale of the order of or larger than ion scales, the hybrid Vlasov−Maxwell description (kinetic ions coupled to a neutralizing electron fluid via electromagnetic fields) represents a suitable approach. When crossing the magnetopause, the ion temperature, density, and direction of magnetic field vary. We derive a form for an exact stationary solution of the hybrid Vlasov−Maxwell equations that represent a magnetized plasma with a quasi-planar shearing flow, variable density and ion temperature, and variable magnetic field direction. A stationary ion distribution function is expressed as a suitable combination of particle constants of motion and evaluated numerically in such a way to obtain configurations with variable density and temperature and two quasi-planar oppositely directed velocity shear layers. Properties of particular configurations are derived from Magnetospheric Multiscale measures during crossings of Earth’s magnetopause. In the first case a quasi-uniformly directed, nearly perpendicular magnetic field is present, while in the second case, going from the magnetosheath to the magnetosphere, the magnetic field makes a wide rotation from one side to the other of the shearing flow plane. In both cases, the ion distribution function departs from a Maxwellian in the shear layers, displaying temperature anisotropy and agyrotropy, with a nonsymmetric behavior in the two shear layers. The configurations considered here can be used as models for Earth’s magnetopause in simulations of the Kelvin–Helmholtz instability.
Extreme Nature of Four Blue-excess Dust-obscured Galaxies Revealed by Optical Spectroscopy
Authors: Noboriguchi Akatoki , Nagao Tohru , Toba Yoshiki , Ichikawa Kohei , Kajisawa Masaru , Kato Nanako , Kawaguchi Toshihiro , Matsuhara Hideo , Matsuoka Yoshiki , Onishi Kyoko , Onoue Masafusa , Tamada Nozomu , Terao Koki , Terashima Yuichi , Ueda Yoshihiro , Yamashita Takuji
Published: December 2022

We report optical spectroscopic observations of four blue-excess dust-obscured galaxies (BluDOGs) identified by the Subaru Hyper Suprime-Cam. BluDOGs are a subclass of dust-obscured galaxies (DOGs; defined with the extremely red color (i − [22])AB ≥ 7.0; Toba et al., showing a significant flux excess in the optical g and r bands over the power-law fits to the fluxes at the longer wavelengths. Noboriguchi et al. have suggested that BluDOGs may correspond to the blowing-out phase involved in a gas-rich major-merger scenario. However, the detailed properties of BluDOGs are not understood because of the lack of spectroscopic information. In this work, we carry out deep optical spectroscopic observations of four BluDOGs using Subaru/FOCAS and VLT/FORS2. The obtained spectra show broad emission lines with extremely large equivalent widths, and a blue wing in the C iv line profile. The redshifts are between 2.2 and 3.3. The averaged rest-frame equivalent widths of the C iv lines are 160 ± 33 Å, ∼7 times higher than the average of a typical type 1 quasar. The FWHMs of their velocity profiles are between 1990 and 4470 km s−1, and their asymmetric parameters are 0.05 and 0.25. Such strong C iv lines significantly affect the broadband magnitudes, which are partly the origin of the blue excess seen in the spectral energy distribution of BluDOGs. Their estimated supermassive black hole masses are 1.1 × 108 < M
BH/M
⊙ <5.5 × 108. The inferred Eddington ratios of the BluDOGs are higher than 1 (1.1 < λ
Edd < 3.8), suggesting that the BluDOGs are in a rapidly evolving phase of supermassive black holes.
Locating Hidden Exoplanets in ALMA Data Using Machine Learning
Authors: Terry J. P. , Hall C. , Abreau S. , Gleyzer S.
Published: December 2022

Exoplanets in protoplanetary disks cause localized deviations from Keplerian velocity in channel maps of molecular line emission. Current methods of characterizing these deviations are time consuming,and there is no unified standard approach. We demonstrate that machine learning can quickly and accurately detect the presence of planets. We train our model on synthetic images generated from simulations and apply it to real observations to identify forming planets in real systems. Machine-learning methods, based on computer vision, are not only capable of correctly identifying the presence of one or more planets, but they can also correctly constrain the location of those planets.
Empirical Temperature- and Extinction-dependent Extinction Coefficients for the GALEX, Pan-STARRS 1, Gaia, SDSS, 2MASS, and WISE Passbands
Authors: Zhang Ruoyi , Yuan Haibo
Published: December 2022

We have obtained accurate dust reddening from the far-ultraviolet to the mid-infrared for up to 5 million stars by the star-pair algorithm based on LAMOST stellar parameters along with Galaxy Evolution Explorer, Pan-STARRS 1, Gaia, Sloan Digital Sky Survey, Two Micron All Sky Survey, and Wide-field Infrared Survey Explorer photometric data. The typical errors are between 0.01 and 0.03 mag for most colors. We derived the empirical reddening coefficients for 21 colors both in the traditional (single-valued) way and as a function of T
eff and E(B − V) by using the largest samples of accurate reddening measurements, together with the extinction values from Schlegel et al. The corresponding extinction coefficients have also been obtained. The results are compared with model predictions and generally in good agreement. Comparisons with measurements in the literature show that the T
eff- and E(B − V)-dependent coefficients explain the discrepancies between different measurements naturally, i.e., using sample stars of different temperatures and reddening. Our coefficients are mostly valid in the extinction range of 0–0.5 mag and the temperature range of 4000–10,000 K. We recommend that the new T
eff- and E(B − V)-dependent reddening and extinction coefficients should be used in the future. A Python package is also provided for the usage of the coefficients (https://github.com/vnohhf/extinction_coeffcient/).
GOALS-JWST: Tracing AGN Feedback on the Star-forming Interstellar Medium in NGC 7469
Authors: Lai 賴 Thomas S.-Y. 劭愉 , Armus Lee , U Vivian , Díaz-Santos Tanio , Larson Kirsten L. , Evans Aaron , Malkan Matthew A. , Appleton Philip , Rich Jeff , Müller-Sánchez Francisco , Inami Hanae , Bohn Thomas , McKinney Jed , Finnerty Luke , Law David R. , Linden Sean T. , Medling Anne M. , Privon George C. , Song Yiqing , Stierwalt Sabrina , van der Werf Paul P. , Barcos-Muñoz Loreto , Smith J. D. T. , Togi Aditya , Aalto Susanne , Böker Torsten , Charmandaris Vassilis , Howell Justin , Iwasawa Kazushi , Kemper Francisca , Mazzarella Joseph M. , Murphy Eric J. , Brown Michael J. I. , Hayward Christopher C. , Marshall Jason , Sanders David , Surace Jason
Published: December 2022

We present James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) integral-field spectroscopy of the nearby merging, luminous infrared galaxy, NGC 7469. This galaxy hosts a Seyfert type-1.5 nucleus, a highly ionized outflow, and a bright, circumnuclear star-forming ring, making it an ideal target to study active galactic nucleus (AGN) feedback in the local universe. We take advantage of the high spatial/spectral resolution of JWST/MIRI to isolate the star-forming regions surrounding the central active nucleus and study the properties of the dust and warm molecular gas on ∼100 pc scales. The starburst ring exhibits prominent polycyclic aromatic hydrocarbon (PAH) emission, with grain sizes and ionization states varying by only ∼30%, and a total star formation rate of 10–30 M
⊙ yr−1 derived from fine structure and recombination emission lines. Using pure rotational lines of H2 we detect 1.2 × 107
M
⊙ of warm molecular gas at a temperature higher than 200 K in the ring. All PAH bands get significantly weaker toward the central source, where larger and possibly more ionized grains dominate the emission, likely the result of the ionizing radiation and/or the fast wind emerging from the AGN. The small grains and warm molecular gas in the bright regions of the ring however display properties consistent with normal star-forming regions. These observations highlight the power of JWST to probe the inner regions of dusty, rapidly evolving galaxies for signatures of feedback and inform models that seek to explain the coevolution of supermassive black holes and their hosts.
The Effect of Interior Heat Flux on the Atmospheric Circulation of Hot and Ultra-hot Jupiters
Authors: Komacek Thaddeus D. , Gao Peter , Thorngren Daniel P. , May Erin M. , Tan Xianyu
Published: December 2022

Many hot and ultra-hot Jupiters have inflated radii, implying that their interiors retain significant entropy from formation. These hot interiors lead to an enhanced internal heat flux that impinges upon the atmosphere from below. In this work, we study the effect of this hot interior on the atmospheric circulation and thermal structure of hot and ultra-hot Jupiters. To do so, we incorporate the population-level predictions from evolutionary models of hot and ultra-hot Jupiters as input for a suite of general circulation models (GCMs) of their atmospheric circulation with varying semimajor axis and surface gravity. We conduct simulations with and without a hot interior, and find that there are significant local differences in temperature of up to hundreds of Kelvin and in wind speeds of hundreds of meters per second or more across the observable atmosphere. These differences persist throughout the parameter regime studied, and are dependent on surface gravity through the impact on photosphere pressure. These results imply that the internal evolution and atmospheric thermal structure and dynamics of hot and ultra-hot Jupiters are coupled. As a result, a joint approach including both evolutionary models and GCMs may be required to make robust predictions for the atmospheric circulation of hot and ultra-hot Jupiters.
Green Economy for Nature conservation: New paradigm for the Future
Authors: Steblyanskaya Alina , Bobylev Sergey , Jun Yan
Published: December 2022

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Application of genetic and Spatially Explicit Capture-Recapture analyses to design adaptive feral cat control in a large inhabited island
Authors: Juhasz Claire-Cécile , Avargues Naïs , Humeau Laurence , Ringler David , Pinet Patrick , Hollinger Clémence , Beaulieu Richard , Faulquier Lucie , Choeur Arthur , Bureau Sophie , Da Silva Denis , Dubos Jérôme , Soulaimana-Mattoir Yahaia , Le Corre Matthieu
Published: December 2022

Faunas of oceanic islands have a high proportion of endemic species which contribute to the uniqueness of island communities. Island species are particularly naïve and vulnerable to alien predators, such as cats (Felis catus). On large, inhabited islands, where the complete eradication of feral cat populations is not considered feasible, control represents the best management option to lower their detrimental effects on native fauna. The first objective of our study was to investigate population genetics of feral cats of Réunion Island. The second objective was to understand the space use of feral cats established near the breeding colonies of the two endemic and endangered seabirds of Réunion Island, the Barau’s Petrel (Pterodroma baraui) and the Mascarene Petrel (Pseudobulweria aterrima). We evaluated genetic diversity, population structure and gene flow amongst six groups of feral cats located at a maximum of 10 km from known petrel colonies. We also analysed the behaviour and space use of one of these feral cat groups using camera-trap data and Spatially Explicit Capture-Recapture (SECR) models. Genetic analyses revealed that feral cats were structured in three genetic clusters explained mostly by the island topography. Two clusters were observed at five sampled sites, suggesting high connectivity amongst these sites. The last cluster was found in only one site, suggesting high isolation. This site was a remote mountain area located in the vicinity of one of the main Barau’s Petrel colonies. The behavioural study was conducted on this isolated feral cat population. Mark recapture analysis suggested that feral cats were present at low density and had large home ranges, which is probably explained by reduced food availability. Finally, we make several recommendations for refining feral cat management programmes on inhabited islands.
Spreading of the cup plant (Silphium perfoliatum) in northern Bavaria (Germany) from bioenergy crops
Authors: Ende L. Marie , Lauerer Marianne
Published: December 2022

Invasive species can be the cause of severe problems for biodiversity, economy and human health. The cup plant (Silphium perfoliatum) is native to eastern North America and is increasingly cultivated in Germany as a new bioenergy crop. Its growth characteristics and autecology do not exclude a possible invasive potential. However, there are hardly any studies on this to date. In this study, habitat requirements for spontaneous colonization and establishment of the cup plant were investigated. Therefore, a 15 m radius around eleven cup plant fields in northern Bavaria (Germany) was examined. Data on cup plant colonization, habitat type, vegetation structure, ground cover, and further site conditions using the Ellenberg indicator values were collected and analyzed by logistic regression models. Spontaneously colonized cup plants were found in a wide range of habitats. Open habitats and human settlement areas were particularly suitable, especially field margins and agricultural paths. A portion of open soil of about 25% was preferentially colonized. Cup plants occurred predominantly within the first few meters of the field margin and increasingly around cup plant fields that have existed for a longer period. Favorable for the development of stems and thus for flowering, fruiting and establishing are warmer sites with a high herb layer. Individual plants that had developed a stem persist for several years and increased their stem number over time. The number of stem-developing individuals also increased over time. Thus, there exist an enormous potential for spread in the future. However, an invasive potential could not be confirmed based on the present study, because a threat of biodiversity was not proven.
« Le jugement de l’histoire n’est pas rien ». Entretien avec Vincent Duclert, président de la Commission de recherche sur les archives françaises relatives au Rwanda et au génocide des Tutsi
Authors: Duclert Vincent , Smith Étienne , Deslaurier Christine , Awenengo Dalberto Séverine
Published: December 2022

L’historien Vincent Duclert a présidé la commission de recherche sur les archives françaises relatives au Rwanda et au génocide des Tutsi. Cet entretien revient sur sa trajectoire d’historien, sur les conditions et les enjeux du travail de la commission, sur la réception de ses conclusions. Il permet aussi d’évoquer plus largement les pratiques de l’historien, la question de la spécialisation, et le rapport de l’histoire à la justice et à la réparation.
Fiscalité, ordre moral et prévisibilité : le gouvernement djihadiste du Nord-Mali au prisme des pratiques de prélèvement
Authors: Zanoletti Giovanni
Published: December 2022

La rébellion qui a frappé le Mali en 2012 à partir de ses régions du Nord a entraîné une multiplication des acteurs qui collectent les droits de passage sur les routes. L’analyse de ces pratiques – mises en place aussi bien par les forces étatiques que par les groupes armés, djihadistes ou non – dans les conjonctures de 2012-2013 et de 2016 permet de questionner de manière plus large les modes du gouvernement au Mali. L’adéquation entre les pratiques de pouvoir et les normes de sociabilité inscrit les autorités politiques et les gouvernés dans un contrat social implicite dans la mesure où ces pratiques deviennent prévisibles, et par conséquent maîtrisables par les gouvernés. La quotidianisation de cette synthèse entre normes éthico-religieuses et normes socio-économiques émerge comme une attente fondamentale des gouvernés vis-à-vis des autorités politiques.
Une simple agitation de surface ? Événement et festival de neige à Arras à l’hiver 1434–1435
Authors: Lecuppre-Desjardin Élodie
Published: December 2022

Au cours du long et froid hiver de 1434–1435, les citoyens d’Arras, dans le comté d’Artois, décidèrent d’ériger des groupes de bonshommes de neige à travers la ville. Les différents sujets choisis exprimaient les peurs, l’ingéniosité ludique et peut-être l’opinion politique, au travers de la figure de la « Grande Pucelle » qui pourrait être une allusion à la captivité de Jeanne d’Arc, des bourgeois. Les historiens des Temps modernes sont coutumiers de ce type d’amusements, grâce aux travaux d’H. Pleij pour les Pays-Bas et plus récemment ceux de C. Judde de la Rivière à propos de la « Révolte des boules de neiges » de Murano en 1511. Même si la luge, le patin à glace et les boules de neiges sont communément associés aux mois d’hiver dans les calendriers médiévaux, ces créations esthétiques arrageoises sont moins nombreuses pour cette période et peuvent être considérées comme une espèce de festival d’hiver inspiré par les Tableaux vivants et d’autres saynètes habituellement jouées durant les cérémonies civiques. Grâce aux registres urbains, nous savons que cette première exposition de bonshommes de neige a été autorisée par les autorités d’Arras. Ces représentations ne témoignent d’aucun signe de dissension politique mais offrent aux historiens d’accéder aux opinions de cette époque et de la culture populaire de l’Artois du xv e  siècle. Cet article examine la signification allégorique de ces sculptures de neige et lie les sujets choisis par les citoyens d’Arras aux registres de la culture traditionnelle des Pays-Bas, de l’antiquité biblique et classique au folklore local contemporain. Avec une attention spécifiquement témoignée aux rues, marchés et bâtiments où ce spectacle prit place, il tentera de percevoir la signification sociale de ce festival de neige et, finalement, comment cet événement local éclaire la grande histoire de cette époque.
Más allá de ultra. Un recorrido histórico romance por la península ibérica
Authors: Albesa Pedrola Elena
Published: December 2022

La preposición y adverbio latino ULTRĀ pasó a los romances peninsulares con distinta fuerza. En este trabajo, a partir del análisis de todos los casos de ultra (y sus variantes gráficas vltra y hultra y formales oltra y oltras) en lengua romance desde el siglo XIII hasta el XVII a través de tres extensos y reconocidos corpus, CHARTA, CORDE y Biblia Medieval, mostraremos dicha evolución. Se atienden en este estudio, además, a cuestiones relativas a la geografía lingüística y a la tipología textual. Los datos extraídos se ordenan siguiendo un criterio de acepciones que hemos desarrollado ex profeso.
La figura de don Juan de Austria en Amar después de la muerte
Authors: Bayo Julve Juan Carlos
Published: December 2022

Calderón da un papel clave a don Juan de Austria en Amar después de la muerte, pieza donde trata la rebelión de los moriscos en 1568-1571. El dramaturgo insiste en su condición de hijo del emperador Carlos V e invierte la secuencia de los hechos históricos al presentarlo como vencedor de Lepanto. Su don Juan de Austria evoluciona de jefe militar a dirigente político. Calderón puede abordar así un tema candente, la necesidad de dar prioridad a la conservación sobre la reputación en la monarquía de los Austrias, con planteamientos teóricos afines a la Escuela de Salamanca.
Los verbos de especialidad en Alonso de Herrera: transitivos e intransitivos
Authors: Sánchez Orense Marta
Published: December 2022

En 1513 se edita el primer tratado geopónico en castellano, el Libro de agricultura de Gabriel Alonso de Herrera. A pesar de su relevancia, resulta un texto escasamente atendido, especialmente en relación a sus peculiaridades léxicas. En este artículo se realiza un estudio lexicológico y semántico-combinatorio de 51 verbos hortenses con régimen sintáctico exclusivo, para cuyo análisis han resultado determinantes el examen de sus respectivas ocurrencias en el libro IV del tratado herreriano, consagrado a las huertas y sus plantas, así como la información sintáctica proporcionada por los diccionarios.
An Unhealthy Webpage Discovery System Based on Convolutional Neural Network
Authors: Cai Zengyu , Tan Chunchen , Zhang Jianwei , Xiao Tengteng , Feng Yuan
Published: December 2022

Currently, with the popularity of the internet, people are surrounded by a large number of unhealthy pages which have a serious impact on the physical and mental health of visitors. To protect the legitimate rights and interests of internet users from infringement and maintain the harmonious and stable development of society, a new unhealthy webpage discovery system is needed. First, this paper proposed the knowledge of unhealthy webpages and web crawlers, and then the whole system's plan and design were introduced. The test results show that the unhealthy webpage discovery system can meet the needs of users. This experiment uses a CNN algorithm to classify the text and completes the collection and classification of unhealthy information through URL acquisition and URL filtering. The experimental results show that the unhealthy webpage discovery system based on a convolutional neural network can greatly improve the accuracy of unhealthy webpage discovery and reduce the omission rate, which can meet the needs of users for unhealthy webpage discovery.
Roles of Customer Databases and Database Marketing in Customer Relationship Management
Authors: Mandal Pratap Chandra
Published: December 2022

Development in information technology helps companies to build customer databases, perform database marketing, and do relationship management. The study discusses the various aspects of customer databases and database marketing and their roles in relationship management. It discusses the ways in which a customer database can be used to achieve best results. The study discusses the various issues of database marketing, ways of overcoming the issues, internal changes in an organization which should be made for implementing database marketing, and emphasizes that database marketing is not the solution to every issue. Organizations should analyze all these issues during CRM implementation. It also provides a direction for achieving the goals in relationship management. Organizations should be aware of and should consider all these aspects of customer databases and database marketing to develop customer relationships, to do CRM implementation, to achieve business excellence, and to succeed in the long run.
A Comprehensive Survey on Quantum Machine Learning and Possible Applications
Authors: Umer Muhammad Junaid , Sharif Muhammad Imran
Published: December 2022

Machine learning is a branch of artificial intelligence that is being used at a large scale to solve science, engineering, and medical tasks. Quantum computing is an emerging technology that has a very high computational ability to solve complex problems. Classical machine learning with traditional systems has some limitations for problem-solving due to a large amount of data availability. Quantum machine learning has high performance and computational ability that can effectively be used to solve computation tasks. This study reviews the latest articles in quantum computing and quantum machine learning. Building blocks of quantum computing and different flavors of quantum algorithms are also discussed. The latest work in quantum neural networks is also presented. In the end, different possible applications of quantum computing are also discussed.
A Study on Purchase Intention of Agricultural Produce on Shopee Live-Streaming in Malaysia
Authors: Hong Wen Xin , Hoo Wong Chee
Published: December 2022

The purpose of this study is to look into the purchasing intentions of Shopee live-stream shoppers in Malaysia when it comes to agricultural produce. Despite the fact that purchase intention is well-known and well-studied using theory of reasoned action, there are still gaps in the literature. Furthermore, live streaming is a relatively new phenomenon that, despite its growing popularity, has received insufficient research. As a result, there are calls to better understand how it influences purchase intentions. This study tested five hypotheses to explain the relationship between live-stream sellers' attributes and viewers' purchase intention based on the theory of reasoned action, utilitarian gratification theory, and source credibility theory. The methodology used in this study is a quantitative-based correlation research design. Adapting previous literature, 390 samples were collected. The questionnaires were distributed to respondents via email using a convenient sampling method.
A Study on Prediction Performance Measurement of Automated Machine Learning
Authors: Im Euntack , Lee Jina , An Sungbyeong , Gim Gwangyong
Published: December 2022

In digital economics, where value creation using big data becomes important, the ability to analyze data using machine learning and deep learning technology is a key activity in corporate activities. Nevertheless, companies consider it difficult to introduce machine learning and artificial intelligence technologies because they need an understanding of the business as well as data and analysis algorithms. Accordingly, services such as automated machine learning have emerged for easy use of machine learning. In this study, the authors explored the automated machine learning service and compared the random forest and extreme gradient boosting analysis results using WiseProphet and Python. WiseProphet is used as a representative of automated machine learning solutions because it is a cloud-based service that anyone can easily access and can be used in various ways. It is contrasted with the model implemented by Python, which writes code with No coding. As a result of comparing the prediction performance, WiseProphet automatically outperformed the analysis result by parameter optimization.