bluuebunny/crossref_metadata_2025 huggingface dataset:
Modeling and study of the arterial blood flow loaded with nanoparticles under squeezing action in presence of a magnetic field
Authors: Ennaouri Manar , Hachem El-Kaber
Published: January 2022

This article is intended to study the arterial blood flow with nanoparticles in a magnetic field due to the squeezing action of the heart, the study was treated as acasson nanofluid flowing between two parallel plates placed at a distance varying in time and under the influence of a uniform magnetic field with variable chemical reaction. Considering the following effects: viscous dissipation, generation of heat due to friction caused by shear in the flow, joule heating, brownian motion, and the influence of thermo-diffusion. Homotopy Perturbation Method is used to solve the nonlinear differential equations governing the problem. To verify the accuracy of the analytical method used, the results of the homotopy perturbation method (HPM) are compared with the results of the Numerical method using the fourth-order Runge–Kutta method (RK-4) and other results obtained in previous works so that the high accuracy of results is clear. Flow behaviour under the modifying involved physical parameters is also discussed and explained in detail in the form of graphs and tables. Through this study it is observed that magnetic field can be used as a control phenomenon in many flows as it normalizes the flow behaviour. Also, it is shown that positive and negative squeeze numbers have opposite effects on heat and mass transfer flow throughout all the cases. Further, the concentration field is a decreasing function of thermophoresis parameter. While, concentration profile enhances with raising brownian motion parameter. And various other important parameters were analyzed. Findings from this study can help engineers to improve and researchers to investigate faster and easier.
Comparison of relative and k0 neutron activation analysis methods at MA-R1 TRIGA MARK II Research Reactor of CNESTEN (Morocco)
Authors: Chahidi Hassan , Bounouira Hamid , Amsil Hamid , Choukri Abdelmajid , Embarch Khalid , Didi Abdessamad , Aarab Ilias , Laraki Khalid , Marah Hamid
Published: January 2022

Since the installation of the TRIGA MARK II reactors in the National Centre for Nuclear Energy, Science and Technology (CNESTEN), Neutron Activation Data Analysis software (NADA) for neutron activation analysis (NAA) based on the relative method was the first software used; Over the years, the neutron activation analysis laboratory has been seeking to develop other softwares based on k0-INAA standardization namely the K0-IAEA software and the k0 software for Windows. In this paper we will focus on the comparison between the performance of k0 software for Windows and NADA. We compared the results obtained by the NADA Software and k0 for windows for the same input parameters (sample mass, nuclear data, net peak area for the same gamma line and cooling measurement times). In the neutron activation analysis laboratory of the National Center for Nuclear Energy, Science and Technology (CNESTEN) we analysed several reference materials (RM) or certified reference materials (CRM) and WEPAL samples. In this analysis, only certified or recommended values were used to compare the two processes for the different elements.
Nanosatellite case study: Issue of heat dissipation across passive thermal analysis
Authors: Akka Amine , Benabdelouahab Farid , Yerrou Randa
Published: January 2022

One of the major reasons, why nanosatellites are still in a state of vulnerability, is the increase of their thermal temperature, which in many cases leads to the failure of the missions they were originally designed for. In order to maintain the quality of the thermal management system, while keeping the electronic equipment in reliable working conditions. This paper presents a research on the thermal environment and the passive thermal control systems (PTC) of nanosatellites, based on a CFD computational fluid dynamics tool. The idea of this work is to provide a PTC to nanosatellites at a specific altitude in low earth orbit in order to determine their temperature values. From the results collected, the temperatures of the nanosatellites change drastically depending on the presence or absence of heat dissipation. This also depends on the type of the considered coating. It was also noticed that the temperature inclined with the choice of surface coating which was stipulated by the α/ε ratio. Therefore, it would be wise to choose the right surface coating at the very beginning of the design.
A Novel Deep Learning Approach for Short Term Photovoltaic Power Forecasting Based on GRU-CNN Model
Authors: Sabri Mohammed , El Hassouni Mohammed
Published: January 2022

The integration of photovoltaic power brings the key to clean energy. However, the increasing proportion of photovoltaic (PV) energy in power systems due to the random and intermittent nature of solar energy resources is causing difficulties for system operators to dispatch PV power stations. To reduce the negative influence of the use of PV power, it is great significant to predict PV power accurately. In this paper, we propose a high-precision hybrid neural network model that employs Gated Recurrent Units (GRU) and Convolution Neural Network (CNN) to build a GRU-CNN model to forecast PV system output power. The proposed framework has two major phases. Firstly, the sample data is divided into training set and test set. For this, the temporal characteristics of the data set are extracted using a GRU model and the spatial characteristics are obtained using the CNN model. Secondly, the final predicted PV power is obtained through the output layer. The forecasting accuracy of GRU-CNN is determined by the mean absolute error (MAE), mean square error (MSE), determination coefficient (R2) and root mean square error (RMSE) values. The findings of the comparison experiments show that the GRU-CNN model has better accuracy than some deep learning methods, including, GRU, CNN and long-short term memory model (LSTM).
On-line Electrochemical Impedance Spectroscopy method for PV diagnosis system
Authors: Borchani Fadoua , Sallem Souhir , Kammoun Mohamed Ben Ali
Published: January 2022

PV fault conditions in photovoltaic (PV) systems reduce panel power performance and accelerate cell degradation. In this way, many research have recently turned to the diagnosis of PV generator to minimize the cost of the produced energy and ensure reliable power production. This paper proposes a new PV diagnosis system based on on-line Electrochemical Impedance Spectroscopy. This latter is used to estimate internal parameters of PV panel connected to a resistive load via a DC/DC boost converter. The Nyquist Diagram allows to plot and evaluate dynamic impedance response versus variable low frequency signal injected in conjunction with the high frequency system allowing to operate the PV in MPPT condition. The dynamic single diode model with a series resistance, a shunt resistance and a junction capacitance is used to design the PV model in MATLAB/Simulink. Simulations results are given for normal and for faulty operation whether in the PV panel or in the load. Referring to these results, it is concluded that the proposed diagnosis method allows to detect PV panel faults regardless of load variation.
Control of Time, Cost and Quality of Construction Project Management
Authors: Asfoor H.M.A. , AL-Jandeel A.A.T. , Igorevich K.K. , Ivanovna L.A.
Published: January 2022

One of the most common methods of projects management of the implementation of construction projects is the Project Management Triangle (PMT), this method give the balance between the three heads of this triangle time, cost and quality. In addition, the main principle is integrating the design and construction phases in a parallel way, where the basic elements of the project time, cost and quality will not be influenced by each other. some of the projects are established by some construction companies in developing countries in the world have been failed to manage and solve the weaknesses points in these projects and sometimes failures due to the increase in cost or the low level of quality, as found by the field survey. Therefore, the research aim is to develop and apply the general planning mechanisms of the project to get the development of projects detailed plans to control the factors time, cost and quality of the executed works. The main results of the study were, depending on the choice of the target function, can give early or late start times by linear programming solutions for all nodes or events in the project domain; so the early start times of the project should be determined first. The supposed project domain includes a number of nodes ranging from (1-m), as node (1) led to represent the opening of the project activity work and node (m) represent the end of the project and that will be found the balance between the (PMT) elements.
Dynamic simulation and thermal investigation of a PTC for building integration under the climatic conditions of South eastern MOROCCO
Authors: Mohammed Halimi , Ayoub Oumachtaq , Aumeur Elamrani , Choukri Messaoudi
Published: January 2022

This paper aims to report a detailed study of a Parabolic Trough Collector (PTC) prototype’s thermal system that requires a sizing and dimensioning investigation of its main parts. This PTC system possesses a field-type evacuated tube solar collector with U-shaped. Furthermore, a simulation study developed with TRNSYS is carried out to evaluate the validity and the feasibility of this system, in particular, for the low-temperature range. The solar collector is oriented to the south and follows the sun from east to west through a single-axis tracking system under real weather conditions. From the simulation results we noticed that for the operating configuration considered in this study, the solar fraction is significantly large throughout the year. During the summer, needs are covered almost 100 %. Whereas, it is necessary to integrate an auxiliary system for the winter period. The tank temperature reached a maximum of around 90 °C during the summer period. The system constantly ensures a heated floor temperature of around 28 °C. This reported simulation and analysis may enable to design and estimate of the region potential and the system productivity over the year, for different applications such as heating domestic water and underfloor systems.
VOLT Valve: Applying the Frugal Innovation in a Green Touchless Low-Tech Solution
Authors: Benmoussa Ali , Radouani Mohammed , El Fahime Benaissa , Mousaid Ilyass
Published: January 2022

In their innovative development strategy, the third world countries should escape the sheep-like behaviour by following the same pathway as the developed western countries. Because they don’t have the same historical, geopolitical and social factors. There's a lot of truth behind Bruce Lee's well-known quote: “Using no way as way; having no limitation as limitation” by using practical technique with flexibility and reliability instead of theoretical and rigid method. The Frugal Innovation is a good demonstration of this practical way with the ability to “do more with less” [1-2] by creating more business and social value while minimizing the use of diminishing resources such as water, energy and funding. Within this context, the aim of the VOLT valve, where VOLT is the abbreviation of “Valve Opening with Low Tech”, is to propose an autonomous, low tech, eco-efficiency and compact product. This innovation have five distinct aspects that can be resumed in two words, WLoG NoTS (Water, Low, Green, No Touch and Social Technology) which is reflecting a homophony with “ Have nots “ who need to meet their energy and water needs in a quick and smart way.
Probing the role of magnetic fields in star-forming filaments: NIKA2-Pol commissioning results toward OMC-1
Authors: Ajeddig H. , Adam R. , Ade P. , André P. , Artis E. , Aussel H. , Beelen A. , Benoît A. , Berta S. , Bing L. , Bourrion O. , Calvo M. , Catalano A. , De Petris M. , Désert F.-X. , Doyle S. , Driessen E. F. C. , Gomez A. , Goupy J. , Kéruzoré F. , Kramer C. , Ladjelate B. , Lagache G. , Leclercq S. , Lestrade J.-F. , Macías-Pérez J.-F. , Maury A. , Mauskopf P. , Mayet F. , Monfardini A. , Muñoz-Echeverría M. , Perotto L. , Pisano G. , Ponthieu N. , Revéret V. , Rigby A.J. , Ritacco A. , Romero C. , Roussel H. , Ruppin F. , Schuster K. , Shu S. , Sievers A. , Tucker C. , Zylka R. , Shimajiri Y.
Published: January 2022

Dust polarization observations are a powerful, practical tool to probe the geometry (and to some extent, the strength) of magnetic fields in starforming regions. In particular, Planck polarization data have revealed the importance of magnetic fields on large scales in molecular clouds. However, due to insufficient resolution, Planck observations are unable to constrain the B-field geometry on prestellar and protostellar scales. The high angular resolution of 11.7 arcsec provided by NIKA2-Pol 1.15 mm polarimetric imaging, corresponding to 0.02 pc at the distance of the Orion molecular cloud (OMC), makes it possible to advance our understanding of the B-field morphology in star-forming filaments and dense cores (IRAM 30m large program B-FUN). The commissioning of the NIKA2-Pol instrument has led to several challenging issues, in particular, the instrumental polarization or intensity-to-polarization “leakage” effect. In the present paper, we illustrate how this effect can be corrected for, leading to reliable exploitable data in a structured, extended source such as OMC-1. We present a statistical comparison between NIKA2-Pol and SCUBA2-Pol2 results in the OMC-1 region. We also present tentative evidence of local pinching of the B-field lines near Orion-KL, in the form of a new small-scale hourglass pattern, in addition to the larger-scale hourglass already seen by other instruments such as Pol2.
PSZ2 G091: A massive double cluster atz~ 0.822 observed by the NIKA2 camera
Authors: Artis E. , Adam R. , Ade P. , Ajeddig H. , André P. , Arnaud M. , Aussel H. , Bartalucci I. , Beelen A. , Benoît A. , Berta S. , Bing L. , Bourrion O. , Calvo M. , Catalano A. , De Petris M. , Désert F.-X. , Doyle S. , Driessen E. F. C. , Ferragamo A. , Gomez A. , Goupy J. , Kéruzoré F. , Kramer C. , Ladjelate B. , Lagache G. , Leclercq S. , Lestrade J.-F. , Macías-Pérez J.-F. , Maury A. , Mauskopf P. , Mayet F. , Monfardini A. , Muñoz-Echeverría M. , Paliwal A. , Perotto L. , Pisano G. , Pointecouteau E. , Ponthieu N. , Pratt G. W. , Revéret V. , Rigby A. J. , Ritacco A. , Romero C. , Roussel H. , Ruppin F. , Schuster K. , Shu S. , Sievers A. , Tucker C. , Yepes G.
Published: January 2022

PSZ2 G091.83+26.11 is a massive galaxy cluster withM500= 7:43 × 1014M⊙atz= 0:822. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in thePlancksample as a single, spherical cluster following a universal profile [1]. This model can lead to miscalculations of thermodynamical quantities, like the pressure profile. As future multiwavelength cluster experiments will detect more and more objects at higher redshifts (where we expect the fraction of merging objects to be higher), it is crucial to quantify this systematic effect. In this work, we use high-resolution observations of PSZ2 G091.83+26.11 by the NIKA2 camera to integrate the morphological characteristics of the cluster in our modelling. This is achieved by fitting a two-halo model to the SZ image and then by reconstruction of the resulting projected pressure profile. We then compare these results with the spherical assumption.
Millimetric Sardinia radio Telescope Receiver based on Array of Lumped elements kids
Authors: D’Alessandro G. , Barbarava E. , Battistelli E.S. , de Bernardis P. , Cacciotti F. , Capalbo V. , Carretti E. , Columbro F. , Coppolecchia A. , Cruciani A. , De Petris M. , Govoni F. , Isopi G. , Lamagna L. , Marongiu P. , Masi S. , Mele L. , Molinari M. , Murgia M. , Navarrini A. , Orlati A. , Paiella A. , Pettinari G. , Piacentini F. , Pisanu T. , Poppi S. , Presta G. , Radiconi F.
Published: January 2022

MISTRAL is a millimetric camera working in the W-band (78–103 GHz) which will take data from the Sardinia Radio Telescope, the Italian 64-m radio telescope located 50 km form Cagliari, at 600m above the sea level, in Sardinia. It is being built as a facility instrument by the Sapienza University for INAF, that manages the radio telescope, under a PON contract. It will consist of a compact cryostat hosting the re–imaging optics, cooled at 4K, and a 408–pixel array of photon–noise limited lumped element kinetic inductance detectors fabricated at CNR-IFN and cooled at a base temperature lower than 300mK. MISTRAL will be able to investigate a long list of scientific targets spanning from extragalactic astrophysics to solar system science, with high angular resolution (~ 12 arcsec), including Sunyaev Zel’dovich effect measurements and the study of the Cosmic Web.
Velocity dispersion vs cluster mass: A new scaling law with The Three Hundred clusters
Authors: Ferragamo Antonio , De Petris Marco , Yepes Gustavo , Macías-Pérez Juan , Cui Weiguang , Jiménez-Muñoz Alejandro
Published: January 2022

The Planck Collaboration has shown that the number of clusters as a function of their mass and redshift is an extremely powerful tool for cosmological analyses. However, the true cluster mass is not directly measurable. Among the possible approaches, clusters mass could be related to different observables via self similar scaling law. These observables are related to the baryonic components of which a cluster is composed. However, the theoretical relations that allow the use of these proxies often are affected by observational and physical biases, which impacts on the determination of the cluster mass. Fortunately, cosmological simulations are an extremely powerful tool to assess these problems. We present our calibration of the scaling relation between mass and velocity dispersion of galaxy members from the study of the simulated clusters of The Three Hundred project with mass above 1013M⊙. In order to investigate the presence of a redshift dependence, we analyzed 16 different redshifts between z = 0 and z = 2. Finally, we investigated the impact of different AGN feedback models.
Cosmic dust evolution: The challenges for NIKA2
Authors: Galliano Frédéric ,   the DustPedia collaboration
Published: January 2022

I summarize a recent study aimed at constraining dust evolution timescales in nearby galaxies. We were able to quantify the effciency of dust condensation in SN II ejecta, grain growth in the ISM and dust destruction by SN II blast waves. Around Solar metallicity, our results are consistent with what we know in the Milky Way, that is dust production is dominated by grain growth. We however show that this changes with metallicity. The dust content in very-low-metallicity systems is dominated by grains that have formed in SN II ejecta. I end this article with a discussion about the potential of NIKA2 to study dust evolution in galaxies.
The hydrostatic mass bias in The Three Hundred clusters
Authors: Gianfagna Giulia , Rasia Elena , Cui Weiguang , De Petris Marco , Yepes Gustavo
Published: January 2022

The assumption of Hydrostatic equilibrium (HE) is often used in observations to estimate galaxy clusters masses. We use a set of almost 300 simulated clusters from The Three Hundred Project, to estimate the cluster HE mass and the bias deriving from it. We study the dependence of the bias on several dynamical state indicators across a redshift range from 0.07 to 1.3, finding no dependence between them. Moreover, we focus our attention on the evolution of the HE bias during the merger phase, where the bias even reaches negative values due to an overestimation of the mass with HE.
The Three Hundred project: Contrasting clusters galaxy density in hydrodynamical and dark matter only simulations
Authors: Jiménez Muñoz A. , Macías-Pérez J.F. , Cui W. , De Petris M. , Ferragamo A. , Yepes G.
Published: January 2022

Cluster number count is a major cosmological probe for the next generation of cosmological large scale-structure surveys like the one expected from the Euclid satellite mission. Cosmological constraints will be mainly limited by the understanding of the selection function (SF), which characterize the probability of detecting a cluster of a given mass and redshift. The SF can be estimated by injecting realistic simulated clusters into the survey and re-applying the detection procedure. For this purpose we intend to use The Three Hundreds project, a 324 cluster sample simulated with full-physics hydrodynamical re-simulations. In this paper we concentrate on the study of the distribution of member galaxies in the cluster sample. First, we study possible resolution effects by comparing low and high resolution simulations. Finally, accounting for the latter we derive the density profiles of the member galaxies and discuss their evolution with cluster mass and redshift.
Exploring the millimetre emission in nearby galaxies: Analysis of the edge-on galaxy NGC 891
Authors: Katsioli S. , Adam R. , Ade P. , Ajeddig H. , André P. , Artis E. , Aussel H. , Beelen A. , Benoît A. , Berta S. , Bing L. , Bourrion O. , Calvo M. , Catalano A. , De Looze I. , De Petris M. , Désert F.-X. , Doyle S. , Driessen E.F. C. , Ejlali G. , Galametz M. , Galliano F. , Gomez A. , Goupy J. , Jones A.P. , Hughes A. , Kéruzoré F. , Kramer C. , Ladjelate B. , Lagache G. , Leclercq S. , Lestrade J.-F. , Macías-Pérez J.-F. , Madden S.C. , Maury A. , Mauskopf P. , Mayet F. , Monfardini A. , Muñoz-Echeverría M. , Nersesian A. , Perotto L. , Pisano G. , Ponthieu N. , Revéret V. , Rigby A.J. , Ritacco A. , Romero C. , Roussel H. , Ruppin F. , Schuster K. , Shu S. , Sievers A. , Smith M. W. L. , Tabatabaei F. , Tucker C. , Xilouris E. M. , Zylka R.
Published: January 2022

New observations of the edge-on galaxy NGC 891, at 1.15 and 2mm obtained with the IRAM 30-m telescope and the NIKA2 camera, within the framework of the IMEGIN (Interpreting the Millimetre Emission of Galaxies with IRAM and NIKA2) Large Program, are presented in this work. By using multiwavelength maps (from the mid-IR to the cm wavelengths) we perform SED fitting in order to extract the physical properties of the galaxy on both global and local (~kpc) scales. For the interpretation of the observations we make use of a state-of-the-art SED fitting code, HerBIE (HiERarchical Bayesian Inference for dust Emission). The observations indicate a galaxy morphology, at mm wavelengths, similar to that of the cold dust emission traced by submm observations and to that of the molecular gas. The contribution of the radio emission at the NIKA2 bands is very small (negligible at 1.15 mm and ~ 10% at 2 mm) while it dominates the total energy budget at longer wavelengths (beyond 5 mm). On local scales, the distribution of the free-free emission resembles that of the dust thermal emission while the distribution of the synchrotron emission shows a deficiency along the major axis of the disc of the galaxy.
PANCO2: A new software to measure pressure profiles from resolved thermal SZ observations
Authors: Kéruzoré F. , Artis E. , Macías-Pérez J.-F. , Mayet F. , Muñoz-Echeverría M. , Perotto L. , Ruppin F.
Published: January 2022

We have developed a new software to perform the measurement of galaxy cluster pressure profiles from high angular resolution thermal SZ observations. The code allows the user to take into account various features of millimeter observations, such as point spread function (PSF) convolution, pipeline filtering, correlated residual noise, and point source contamination, in a forward modeling approach. A major advantage of this software is its performance, enabling the extraction of the pressure profile and associated confidence intervals via MCMC sampling in times as short as a few minutes. We present the code and its validation on various realistic synthetic maps, of ideal spherical clusters, as well as of realistic, hydrodynamically simulated objects. We plan to publicly release the software in the coming months.
Joint constraints on the galaxy cluster pressure profile from Planck and SPT-SZ
Authors: Melin Jean-Baptiste , Pratt Gabriel W. , Arnaud Monique
Published: January 2022

We present the average pressure profile of 461 galaxy clusters from the 2500d South Pole Telescope catalogue measured in the Planck and SPT-SZ data jointly. The joint measurement is performed in Fourier space for the first time, and takes advantage of the complementarity between the high resolution of SPT (1.75 arcmin beam) and the coverage of large angular scales by Planck (> 30 arcmin). The redshift leverage of the catalogue allows the study of the evolution of the profile. We also constrain the profile shape in the outskirts.
The LPSZ-CLASH galaxy cluster sample: Combining lensing and hydrostatic mass estimates
Authors: Muñoz-Echeverría M. , Adam R. , Ade P. , Ajeddig H. , André P. , Arnaud M. , Artis E. , Aussel H. , Bartalucci I. , Beelen A. , Benoît A. , Berta S. , Bing L. , Bourrion O. , Calvo M. , Catalano A. , De Petris M. , Désert F.-X. , Doyle S. , Driessen E. F. C. , Ferragamo A. , Gomez A. , Goupy J. , Kéruzoré F. , Kramer C. , Ladjelate B. , Lagache G. , Leclercq S. , Lestrade J.-F. , Macías-Pérez J.-F. , Maury A. , Mauskopf P. , Mayet F. , Monfardini A. , Paliwal A. , Perotto L. , Pisano G. , Pointecouteau E. , Ponthieu N. , Pratt G. W. , Revéret V. , Rigby A. J. , Ritacco A. , Romero C. , Roussel H. , Ruppin F. , Schuster K. , Shu S. , Sievers A. , Tucker C. , Yepes G.
Published: January 2022

Starting from the clusters included in the NIKA sample and in the NIKA2 Sunyaev-Zel’dovich Large Program (LPSZ) we have selected a sample of six common objects with the Cluster Lensing And Supernova survey with Hubble (CLASH) lensing data. For the LPSZ clusters we have at our disposal both high-angular resolution observations of the thermal SZ with NIKA and NIKA2 and X-ray observations with XMM-Newton from which hydrostatic mass estimates can be derived. In addition, the CLASH dataset includes lensing convergence maps that can be converted into lensing estimates of the total mass of the cluster. One-dimensional mass profiles are used to derive integrated mass estimates accounting for systematic effects (data processing, modeling, etc.). Two-dimensional analysis of the maps can reveal substructures in the cluster and, therefore, inform us about the dynamical state of each system. Moreover, we are able to study the hydrostatic mass to lensing mass bias, across different morphology and a range of redshift clusters to give more insight on the hydrostatic mass bias. The analysis presented in this proceeding follows the study discussed in [20].
The Three Hundred–NIKA2 Sunyaev–Zeldovich Large Program twin samples: Synthetic clusters to support real observations
Authors: Paliwal A. , Artis E. , Cui W. , De Petris M. , Désert F.-X. , Ferragamo A. , Gianfagna G. , Kéruzoré F. , Macías-Pérez J.-F. , Mayet F. , Muñoz-Echeverría M. , Perotto L. , Rasia E. , Ruppin F. , Yepes G.
Published: January 2022

The simulation database of The Three Hundred Project has been used to pick synthetic clusters of galaxies with properties close to the observational targets of the NIKA2 camera Sunyaev–Zeldovich (SZ) Large Program. Cross–matching of cluster parameters such as mass and redshift of the cluster in the two databases has been implemented to generate the so–called twin samples for the Large Program. This SZ Large Program is observing a selection of galaxy clusters at intermediate and high redshift (0:5 < z < 0:9), covering one order of magnitude in mass. These are SZ–selected clusters from the Planck and Atacama Cosmology Telescope catalogs, wherein the selection is based on their integrated Compton parameter values, Y500: the value of the parameter within the characteristics radius R500.

The Three Hundred hydrodynamical simulations provide us with hundreds of clusters satisfying these redshift, mass, and Y500 requirements. In addition to the standard post-processing analysis of the simulation, mock observational maps are available mimicking X–ray, optical, gravitational lensing, radio, and SZ observations of galaxy clusters. The primary goal of employing the twin samples is to compare different cluster mass proxies from synthetic X–ray, SZ effect and optical maps (via the velocity dispersion of member galaxies and lensing κ-maps) of the clusters. Eventually, scaling laws between different mass proxies and the cluster mass will be cross–correlated to reduce the scatter on the inferred mass and the mass bias will be related to various physical parameters.
Galactic star formation with NIKA2 (GASTON): Filament convergence and its link to star formation
Authors: Peretto N. , Adam R. , Ade P. , Ajeddig H. , André P. , Artis E. , Aussel H. , Bacmann A. , Beelen A. , Benoît A. , Berta S. , Bing L. , Bourrion O. , Calvo M. , Catalano A. , De Petris M. , Désert F.-X. , Doyle S. , Driessen E. F. C. , Gomez A. , Goupy J. , Kéruzoré F. , Kramer C. , Ladjelate B. , Lagache G. , Leclercq S. , Lestrade J.-F. , Macías-Pérez J.-F. , Maury A. , Mauskopf P. , Mayet F. , Monfardini A. , Muñoz-Echeverría M. , Perotto L. , Pisano G. , Ponthieu N. , Revéret V. , Rigby A. , Ristorcelli I. , Ritacco A. , Romero C. , Roussel H. , Ruppin F. , Schuster K. , Shu S. , Sievers A. , Tucker C. , Zylka R.
Published: January 2022

In the past decade filaments have been recognised as a major structural element of the interstellar medium, the densest of these filaments hosting the formation of most stars. In some star-forming molecular clouds converging networks of filaments, also known as hub filament systems, can be found. These hubs are believed to be preferentially associated to massive star formation. As of today, there are no metrics that allow the systematic quantification of a filament network convergence. Here, we used the IRAM 30m NIKA2 observations of the Galactic plane from the GASTON large programme to systematically identify filaments and produce a filament convergence parameter map. We use such a map to show that: i. hub filaments represent a small fraction of the global filament population; ii. hubs host, in proportion, more massive and more luminous compact sources that non-hubs; iii. hub-hosting clumps are more evolved that non-hubs; iv. no discontinuities are observed in the properties of compact sources as a function of convergence parameter. We propose that the rapid global collapse of clumps is responsible for (re)organising filament networks into hubs and, in parallel, enhancing the mass growth of compact sources.
Electrocyclization and Unexpected Reactions of Non-Stabilized α,β:γ,δ-Unsaturated Azomethine Ylides: Experimental and Theoretical Studies
Authors: Kovács Ervin , Nyerges Miklós , Molnár István G. , Mucsi Zoltán
Published: January 2022

Versatile, two-step syntheses of dihydrodibenzo[c,e]azepines, carbazole derivatives, and other alkaloid-type drug-like scaffolds by in situ generated azomethine ylide-induced intramolecular electrocyclization reaction from commercially available materials are presented. The reaction mechanisms of transition-metal-free carbon–carbon bond formation and the role of the kinetic control, resulting in the good regioselectivity, were confirmed by theoretical calculations.
Ru(II)-Catalyzed C–H Activation and Alkyne Annulation Reaction of Phenyl Indandiones: Synthesis of Spirobi[indene]diones
Authors: Gogoi Sanjib , Bora Bidisha R. , Sultana Sabera , Sarma Bipul
Published: January 2022

A Ru(II)-catalyzed synthesis of spirobi[indene]dione from phenyl indandione and alkyne is reported. This metal-catalyzed cyclization reaction proceeds through hydroxy group directed C(sp2)–H bond activation, keto–enol tautomerization and alkyne annulation pathways.
Palladium-Catalyzed C–H Bond Arylation and O- to N-Alkyl Migratory Rearrangement of 2-Alkoxythiazoles: One-Pot Access to 2-Alkoxy-5-arylthiazoles or 3-Alkyl-5-arylthiazol-2(3H)-ones
Authors: Doucet Henri , Huang Hai-Yun , Li Haoran , Cordier Marie
Published: January 2022

Pd-catalyzed direct arylation of 2-alkylthiazoles is a well-known reaction affording the corresponding 2-alkyl-5-arylthiazoles in very high yields. Conversely, the reactivity of 2-alkoxythiazoles has not been described yet. Herein, we report conditions for the Pd-catalyzed regioselective C5-arylation of 2-alkoxythiazoles. Moreover, we also found reaction conditions leading to 3-alkyl-5-arylthiazol-2(3H)-ones via a one-pot direct arylation with an O- to N-alkyl migratory rearrangement. The judicious choice of reaction temperature and time allows control over the selectivity of the reaction. In general, at 100 °C, 2-alkoxy-5-arylthiazoles were the major products, whereas, at 120 °C with a longer reaction time, 3-alkyl-5-arylthiazol-2(3H)-ones were obtained with good selectivities. The arylation reaction is promoted by a ligand-free air-stable palladium catalyst and a simple and inexpensive base, without oxidant or further additives, and tolerates a variety of useful substituents on the aryl bromide and also heteroaryl bromides.
Fecal Diversion in Complex Perianal Fistulizing Crohn's Disease
Authors: Yamamoto Takayuki , Shimoyama Takahiro
Published: January 2022

Complex perianal Crohn's disease (CD) remains a challenging problem. Fecal stream is thought to be a trigger of disease progression in patients with CD. In patients with refractory perianal CD, diversion of fecal stream is sometimes required to alleviate clinical symptoms when medical and local surgical management are unsuccessful. Several studies evaluated the outcomes of fecal diversion for complex perianal CD. After fecal diversion, the majority of patients achieved early clinical response, but the prospect of restoring bowel continuity was low (approximately 20%). Nearly half of the patients eventually required proctectomy. A number of studies attempted to identify predictive factors for the outcomes of fecal diversion. Only rectal involvement was associated with unsuccessful restoration of bowel continuity. Biologic therapy did not seem to improve the efficacy of fecal diversion, although the evidence level was low because of insufficient data or methodological limitations. Based on these results, fecal diversion may be useful in alleviating clinical symptoms related to severe perianal CD and avoiding immediate proctectomy. The impact of biologic therapy on the outcomes of fecal diversion should be further investigated.
Medical Therapy in Chronic Refractory Ulcerative Colitis: When Enough Is Enough
Authors: Damião Aderson Omar Mourão Cintra , Queiroz Natália Sousa Freitas
Published: January 2022

Despite significant improvements in the management of ulcerative colitis (UC) in parallel with the evolution of therapeutic targets and novel biologics and small molecules, a subset of medically refractory patients still requires colectomy. Recent population-based studies demonstrate a trend toward a decrease in the rates of surgery for UC patients in the biological era, although the potential of disease modification with these agents is still debated. As the concept of irreversible bowel damage is underexplored in UC, refractory patients can be exposed to multiple treatments losing optimal timing for surgery and further developing complications such as dysplasia/cancer, dysmotility, microcolon, and other functional abnormalities. This review aims to discuss the concept of disease progression in UC, explore the limitations of medical treatment in refractory UC patients, and propose the application of a three-step algorithm that allows timely indication for surgery in clinical practice.
Anorectal Strictures in Complex Perianal CD: How to Approach?
Authors: Lightner Amy L. , Regueiro Miguel
Published: January 2022

Anorectal strictures are a notoriously difficult to treat phenotype of perianal Crohn's disease. Quality of life is diminished due to ongoing pain, incontinence, difficulty with stool evacuation, and recurrent medical and surgical treatments. Medical therapy is aimed at treating luminal disease and mucosal ulceration to prevent worsening of fibrosis. Clinical examination and endoscopic intervention can be used for serial dilations of strictures. Unfortunately, despite optimal medical therapy and endoscopic intervention with serial anal dilations, surgery with intestinal diversion or proctocolectomy may be required as part of the treatment algorithm in a significant proportion of patients.
Cohorte histórica de artroplastia unicompartimental de rodilla en un hospital universitario chileno
Authors: Infante Carlos , Barahona Maximiliano , Palma Daniel , Barrientos Cristian , Palet Miguel , Zamorano Álvaro , Hinzpeter Jaime , Catalan Jaime
Published: January 2022

Objetivo Describir el resultado funcional informado por el paciente de una cohorte de pacientes sometidos a artroplastia unicompartimental de rodilla (AUR) en un hospital universitario chileno.

Métodos Se diseñó un estudio de cohorte histórica. Se incluyeron todos los pacientes que se sometieron a AUR de platillo fijo entre 2003 y 2019. Un evaluador independiente se puso en contacto con los pacientes en junio de 2020. Se utilizó el índice de artritis de las universidades de Western Ontario y McMaster (WOMAC) para comparar los procedimientos de AUR (medial o lateral), la edad (mayor o menor de 70 años), y el seguimiento (más o menos de 5 años).

Resultados Se incluyeron 78 pacientes, en un total de 94 AURs. La mediana de edad fue de 64 años (rango: 43 a 85 años). Hubo 72 (76,6%) casos de AUR medial. Un paciente necesitó revisión para artroplastia total de rodilla (ATR). Un total de 60 pacientes (76,9%), correspondientes a 72 AURs (76,7%), fueron contactados con éxito por teléfono para el seguimiento final. La mediana del puntaje en los dominios del WOMAC fue: dolor – 1 (rango: 0 a 12); rigidez – 0 (rango: 0 a 4); y función física – 2 (rango: 0 a 29). La mediana del puntaje total en el WOMAC fue de 4 (rango: 0 a 44). Los pacientes sometidos a AUR lateral lograron mejores puntuaciones funcionales (p = 0,0432), y el puntaje total en el WOMAC fue similar en pacientes mayores o menores de 70 años (p = 0,3706).

Conclusiones La AUR es un tratamiento eficaz y reproducible para pacientes con artrosis de rodilla unicompartimental. La edad parece no afectar los resultados funcionales, y la AUR es un tratamiento eficaz en pacientes mayores de 70 años. Estos resultados deberían animar a los cirujanos de rodilla a aprender esta técnica y a los responsables de las políticas de salud pública a considerar la AUR para la osteoartritis de rodilla.
Left Subclavian Artery Sacrifice in Acute Aortic Dissection Repair using the Frozen Elephant Trunk
Authors: Goebel Nora , Holder Simone A. , Huether Franziska , Bail Dorothee H. L. , Franke Ulrich F. W.
Published: January 2022

Objective Surgery of acute aortic dissection using the frozen elephant trunk (FET) can be complicated when the origin of the left subclavian artery (LSA) is dissected and sacrifice by ligation is a viable option. However, the LSA is supposed to play a role in neuroprotection as a major collateral. We, therefore, analyzed our results of LSA sacrifice in this cohort.

Methods We identified a total of 84 patients from our prospectively collected database who underwent FET repair of acute aortic dissection between October 2009 and April 2018. LSA was sacrificed in 19 patients (22.6%). Results were analyzed and compared with regard to neurological outcomes.

Results New postoperative stroke was seen in two patients (2.4%) and spinal cord injury in three patients (3.6%) overall, none in the LSA-sacrifice group. We observed a temporary neurological deficit in five patients (6.0%) overall, none in the LSA-sacrifice group. None of the patients developed acute ischemia of the left arm. Only two patients (12.5%) came back for carotid-subclavian artery bypass due to exertion-induced weakness of the left arm 3 to 4 months after the initial surgery. In-hospital mortality was 15.5% overall, with no difference between groups.

Conclusion LSA sacrifice was not associated with elevated postoperative risk of either central or spinal neurological injury. Thus, it can facilitate FET repair of acute aortic dissection in selected cases when the left subclavian origin cannot be preserved. Carotid-subclavian artery bypass became necessary in only a small fraction of these patients and can be performed as a second-stage procedure.
Coagulation Studies Are Not Predictive of Hematological Complications of COVID-19 Infection
Authors: Hadique Sarah , Badami Varun , Sangani Rahul , Forte Michael , Alexander Talia , Goswami Aarti , Garrison Adriana , Wen Sijin
Published: January 2022

Objectives Thrombotic and bleeding complications are common in COVID-19 disease. In a prospective study, we performed a comprehensive panel of tests to predict the risk of bleeding and thrombosis in patients admitted with hypoxic respiratory failure due to severe COVID-19 infection.

Methods We performed a single center (step down and intensive care unit [ICU] at a quaternary care academic hospital) prospective study. Sequentially enrolled adult (≥18 years) patients were admitted with acute hypoxic respiratory failure due to COVID-19 between June 2020 and November 2020. Several laboratory markers of coagulopathy were tested after informed and written consent.

Results Thirty-three patients were enrolled. In addition to platelet counts, prothrombin time, and activated partial thromboplastin time, a series of protocol laboratories were collected within 24 hours of admission. These included Protein C, Protein S, Antithrombin III, ADAMTS13, fibrinogen, ferritin, haptoglobin, and peripheral Giemsa smear. Patients were then monitored for the development of hematological (thrombotic and bleeding) events and followed for 30 days after discharge. Twenty-four patients (73%) required ICU admissions. At least one laboratory abnormality was detected in 100% of study patients. Nine patients (27%) suffered from significant hematological events, and four patients had a clinically significant bleeding event requiring transfusion. No significant association was observed between abnormalities of coagulation parameters and the incidence of hematologic events. However, a higher SOFA score (10.89 ± 3.48 vs. 6.92 ± 4.10, p = 0.016) and CKD (5/9 [22.2%] vs. 2/24 [12.5%] p = 0.009) at baseline were associated with the development of hematologic events. 33.3% of patients died at 30 days. Mortality was similar in those with and without hematological events. Reduced ADAMTS13 level was significantly associated with mortality.

Conclusion Routine extensive testing of coagulation parameters did not predict the risk of bleeding and thrombosis in COVID-19 patients. Thrombotic and bleeding events in COVID-19 patients are not associated with a higher risk of mortality. Interestingly, renal dysfunction and a high SOFA score were found to be associated with increased risk of hematological events.
A general method for the development of diabatic spin–orbit models for multi-electron systems
Authors: Fritsch Fabian , Weike Thomas , Eisfeld Wolfgang
Published: January 2022

Spin–orbit (SO) coupling can have significant effects on the quantum dynamics of molecular systems, but it is still difficult to account for accurately. One promising way to do this is to devise a diabatic SO model combined with the molecular potential energy. Few such models have been developed utilizing spatial and time-reversal symmetry. These models are tedious to derive and are specific for the molecular symmetry and included spin states. Here, we present a relatively simple approach to construct such models for various spin states with S≠12 from a basic one-electron SO case with S=12. The multi-electron fine structure states are expressed in terms of Slater determinants of single-electron spin functions (spinors). The properties of all single-electron matrix elements over the SO operator are derived and expressed as Taylor expansions in terms of symmetry-adapted nuclear coordinates. The SO matrix elements for the multi-electron case are then obtained from these single-electron matrix elements using the Slater–Condon rules. This yields the full SO matrix and symmetry properties of the multi-electron matrix elements in a straightforward way. The matrix elements are expressed as symmetry-adapted polynomials up to arbitrary order. This approach is demonstrated first for an abstract model of two electrons in a set of p orbitals in a C3v symmetric environment and then applied to set up a diabatic model for the photodissociation of methyl iodide (CH3I). The high accuracy of this new approach is demonstrated in comparison to an available analytic SO model for CH3I.
The evaluation of status in Boris Johnson’s political speeches
Authors: Dolón Rosana
Published: January 2022

This study compares two seminal speeches given by Boris Johnson in the context of Brexit. The first is from 2018 during his tenure as Foreign Secretary, and the second from 2020, by which time he had become Prime Minister. The transcripts of the two complete speeches together constitute a corpus of 7,270 words. The current study applies Hunston’s (2000,2008,2011) model of evaluation as a means of testing Johnson’s attitude towards the propositions he develops through his political oratory. Using the concepts of evaluation of status and value, this model allows us to identify Johnson’s degree of alignment with his representation of the world, and to perceive an ideological component in his choices here. It is hypothesized that the changes which took place in the political landscape in the time that separated the two speeches, a period of two years in which Johnson became Prime Minister and Britain left the European Union, may have had an effect on his use of evaluative language. The study reveals statistically significant findings. Johnson is found to have changed from contributing primarily world-creating propositional content in his 2018 speech to a more significant use of world-reflecting statements in his 2020 speech, and to rely in both speeches most importantly on himself as the source of information. The study also reveals a reluctance to display any hypothetical speech behaviour, and a strong preference for truth driven statements.
Relations between complexity and difficulty on repeating-pattern tasks in early childhood (Relaciones entre complejidad y dificultad en tareas con patrones reiterativos en la primera infancia)
Authors: Diago Pascual D. , Yáñez Dionisio F. , Arnau David
Published: January 2022

Patterning, as a component of early mathematic knowledge, is a common activity carried out at elementary levels in which children are not equally successful. This study aimed to measure different variables affecting performance on patterning tasks in early childhood. For this purpose, the success of Pre-K ( N = 33), K ( N = 31) and first-grade ( N = 33) children when solving 14 repeating-pattern tasks, which varied in complexity, was analysed. The results revealed no significant differences between core-2 and core-4 length patterns, and greater success with patterns involving size. The study also introduces distractors, as a novel factor, in the patterning activities related to the presence of contradictory or surplus data. The impact of each factor and the relations between complexity and difficulty on the patterning tasks are discussed in order to contribute to the design of teaching itineraries.