bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of models for the gas-air mixtures formation
Authors: Простов Е.Е. 
Published: March 2023

В зданиях и сооружениях, где находятся автомобили, работающие на газомоторном топливе, периодически возникают аварийные ситуации, приводящие к пожарам и взрывам, а следовательно, к большому числу раненых и погибших, значительному материальному ущербу как в самих зданиях и сооружениях, так и на соседних объектах, прилегающей территории. При разгерметизации технологического оборудования, в том числе газобаллонных автомобилей, происходит выброс газа. В настоящей статье проанализированы методы расчета распространения газов с учетом влияния препятствий (различных объектов) на динамику процесса истечения газовоздушной смеси, имеющей при аварийном выбросе различные химические и физические параметры.
In buildings and structures with gas-powered vehicles presence there are occasional emergency situations resulting in explosions and fires. They lead to a large number of injuries and fatalities, to significant material damage both in the buildings and structures with gas-powered vehicles and in neighbouring facilities, on the adjacent territory. The article provides the analysis of the possibilities of existing methods for calculating the spread of gases taking into account the influence of obstacles (various objects) on the dynamics of the gas outflow process during the depressurization of technological equipment, including gas-cylinder cars. In case of an emergency release the gas-air mixture has various chemical and physical parameters that should be taken into account. As a result of processing experimental data on the study of combustible gas concentration fields in enclosed spaces there were obtained the values of coefficients taken into account in the Gauss model. The analysis of the considered methods for calculating gas propagation showed that analytical methods do not take into account the influence of obstacles (various objects) on the dynamics of the gas outflow process during the depressurization of technological equipment. To solve this problem, it is proposed to use methods for numerical modeling of hydrodynamic processes that allow to study the complex nature of the spatial gas distribution in various enclosed spaces, taking into account technological, structural and other features that affect the parameters of gas-air flows. This method consists of nonlinear equations and strongly depends on the initial and boundary conditions. Until recently, the solution of this system of equations by numerical methods was possible only for the laminar flow regime. Currently, mathematical models that have been created in modern software systems (such as ANSYS, COMSOL, as well as LOGOS PCs, FlowVision) allow us to obtain useful results that can be used in the practical implementation of various projects, including turbulent flow regime.
MAIN PROVISIONS OF THE METHODOLOGY ASSESSING THE SCIENTIFIC AND TECHNICAL LEVEL OF A PROSPECTIVE CREATION PROJECT A WEAPONS’ SYSTEM (COMPLEX, SAMPLE) AND MILITARY EQUIPMENT
Authors: Koval V. , Sen M. , Lahno E. , Prykhodniuk V. , Aleksieiev S. 
Published: March 2023

In the conditions of the russian federation armed aggression against Ukraine the issue of rational distribution of promising projects’ development funds for the creation of weapons and military equipment (hereinafter referred to as WME) systems. The article proposes the main provisions of the methodology for determining the scientific and technical level of promising projects for the creation of WME promising samples which can be used by the military administration of the Armed Forces of Ukraine in the process of determining the financing priority the latest developments.
It is proposed to use indicators to determine the scientific and technical level of a prospective project: the level of scientific novelty – the conformity of conceptual solutions, technologies and principles of operation of the WME model to the current level of scientific knowledge, scientific and technical trends progress; the technical level is the aggregate level of the WME sample technical characteristics, correlated with the best domestic and foreign analogues or benchmarks; the level of readiness is the level determined by the current stage (substantiation of the development, development, production) of the WME sample life cycle; the level of readiness for further development is the presence of the developer with all necessary components for the development of a promising project: scientific potential, production base, qualified personnel etc.
The level of a prospective project scientific novelty is evaluated by an expert based on the analysis of initial data as the conformity of conceptual solutions, technologies and principles of the system operation (complex, sample) proposed by the prospective project to the current level of scientific knowledge, trends of scientific and technical progress.
The technical level of the project is assessed by an expert based on a comparison of the technical characteristics set with the best domestic and foreign analogues or benchmarks.
The current level of a prospective project readiness is expertly assessed by determining the current stage (development justification, development, production) of the life cycle system (complex, sample) of the WME proposed by the prospective project.
The developer’s level of readiness for further development of a promising project is expertly assessed by determining whether the developer has all the necessary components: scientific potential, production base, qualified personnel etc.
Quantitative assessment of the scientific and technical level of a promising project is defined as a weighted sum of expert evaluations for each of the indicators from all experts evaluating the promising project and is used to form a recommendation regarding the further development of the promising project.
Knowledge management in industrial companies
Authors: ELMORTADA Asmaa , MOKHLIS Chams Eddoha , ELFEZAZI Said 
Published: March 2023

The industrial enterprise as a development organization of the country is as also concerned by the formation of its own elite. Indeed, in an economic environment increasingly complex and competitive, companies, especially those of industrial activity are now aware, more than ever, of the importance of knowledge management of their human resources as a primary factor for strengthening the innovative spirit of its employees, and therefore the performance of the different chains of the business.
The concern of this article is, first, to describe the reasons for the emergence of the concept of knowledge management within firms. On the other hand, we will try to highlight the interests and objectives of this type of management, but more importantly, to highlight the difficulties and limitations of the application of its procedures.
He Abundance of Dense Circumstellar Clumps in the Cassiopeia A Supernova Remnant
Authors: Koo Bon-Chul , Kim Dongkok , Yoon Sung-Chul , Raymond John C. 
Published: March 2023

Abstract
We report on the result of He abundance analysis of dense circumstellar clumps in the young supernova remnant Cassiopeia A. These clumps, which are called quasi-sta
tionary flocculi (QSFs), are known from previous optical studies to be enriched in He along with N, but the degree of He overabundance relative to H has remained uncertain. For several QSFs with near-infrared spectroscopic data, we have analyzed their He i 1.083 μm/Paγ ratios together with the ratios of [Fe ii] lines by using the Raymond shock code. According to our analysis, He is overabundant relative to H by a factor of ≲3 in most of these QSFs. This He abundance of QSFs is consistent with the previous conclusion from the N overabundance that QSFs were ejected when a substantial amount of the H envelope of the progenitor star had been stripped off. We discuss the mass-loss history of the progenitor star and the origin of QSFs.
Differential Interferometric Signatures of Close Binaries of Supermassive Black Holes in Active Galactic Nuclei. II. Merged Broad-line Regions
Authors: Songsheng Yu-Yang , Wang Jian-Min 
Published: March 2023

Abstract
Pairs of supermassive black holes (SMBHs) at different stages are the natural results of galaxy mergers in the hierarchical framework of galaxy formation and evolution. However, identification of close binaries of SMBHs (CB-SMBHs) with sub-parsec separations in observations are still elusive. Recently, unprecedented spatial resolutions achieved by GRAVITY/GRAVITY+ on board the Very Large Telescope Interferometer through spectroastrometry (SA) provide new opportunities to resolve CB-SMBHs. Differential phase curves of CB-SMBHs with two independent broad-line regions (BLRs) are found to have distinguished characteristic structures from a single BLR. Once the CB-SMBH evolves to the stage where BLRs merge to form a circumbinary BLR, it will hopefully be resolved by the pulsar timing array in the near future as sources of nanohertz gravitational waves. In this work, we use a parameterized model for circumbinary BLRs to calculate line profiles and differential phase curves for SA observations. We show that both profiles and phase curves exhibit asymmetries caused by the Doppler boosting effect of accretion disks around individual black holes, depending on the orbital parameters of the binary and geometries of the BLR. We also generate mock SA data using the model and then recover orbital parameters by fitting the mock data. Degeneracies between parameters contribute greatly to uncertainties of parameters but can be eased through joint analysis of multiple-epoch SA observations and reverberation mappings.
Color Gradients and Half-mass Radii of Galaxies Out to z = 2 in the CANDELS/3D-HST Fields: Further Evidence for Important Differences in the Evolution of Mass-weighted and Light-weighted Sizes
Authors: Miller Tim B. , van Dokkum Pieter , Mowla Lamiya 
Published: March 2023

Abstract
Recent studies have indicated that the ratio between half-mass and half-light radii, r
mass/r
light, varies significantly as a function of stellar mass and redshift, complicating the interpretation of the ubiquitous r
light − M
* relation. To investigate, in this study we construct the light and color profiles of ∼3000 galaxies at 1 < z < 2 with

log

M

*

/

M

⊙

>
10.25

using imcascade, a Bayesian implementation of the Multi-Gaussian Expansion (MGE) technique. imcascade flexibly represents galaxy profiles using a series of Gaussians, free of any a priori parameterization. We find that both star-forming and quiescent galaxies have, on average, negative color gradients. For star-forming galaxies, we find steeper gradients that evolve with redshift and correlate with dust content. Using the color gradients as a proxy for gradients in the M/L ratio, we measure half-mass radii for our sample of galaxies. There is significant scatter in individual r
mass/r
light ratios, which is correlated with variation in the color gradients. We find that the median r
mass/r
light ratio evolves from 0.75 at z = 2 to 0.5 at z = 1, consistent with previous results. We characterize the r
mass − M
* relation, and we find that it has a shallower slope and shows less redshift evolution than the r
light − M
* relation. This applies both to star-forming and quiescent galaxies. We discuss some of the implications of using r
mass instead of r
light, including an investigation of the size−inclination bias and a comparison to numerical simulations.
Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2
Authors: Azadi Mojegan , Wilkes Belinda , Kuraszkiewicz Joanna , McDowell Jonathan , Siebenmorgen Ralf , Ashby Matthew , Birkinshaw Mark , Worrall Diana , Abrams Natasha , Barthel Peter , Fazio Giovanni G. , Haas Martin , Hyman Sóley , Martínez-Galarza Rafael , Meyer Eileen T. 
Published: March 2023

Abstract
We constrain the emission mechanisms responsible for the prodigious electromagnetic output generated by active galactic nuclei (AGNs) and their host galaxies with a novel state-of-the-art AGN radio-to-X-ray spectral energy distribution model fitting code (ARXSED). ARXSED combines multiple components to fit the spectral energy distributions (SEDs) of AGNs and their host galaxies. Emission components include radio structures such as lobes and jets, infrared emission from the AGN torus, visible-to-X-ray emission from the accretion disk, and radio-to-ultraviolet emission from the host galaxy. Applying ARXSED to the radio SEDs of 20 3CRR quasars at 1 < z < 2 verifies the need for more than a simple power law when compact radio structures are present. The nonthermal emission contributes 91%–57% of the observed-frame 1.25 mm to 850 μm flux, and this component must be accounted for when using these wavelengths to estimate star formation properties. We predict the presence of strong radio-linked X-ray emission in more than half the sample sources. ARXSED estimates median (and the associated first and third quartile ranges) BH mass of

2.9

1.7

6.0

×

10

9

M

☉

, logarithm of Eddington ratio of

−

1.0

−
1.2

−
0.6

, and spin of

0.98

0.94

0.99

for our sample. The inferred AGN torus and accretion disk parameters agree with those estimated from spectroscopic analyses of similar samples in the literature. We present the median intrinsic SED of the luminous radio-loud quasars at 1 < z ≲ 2; this SED represents a significant improvement in the way each component is modeled.
Light-curve Recovery with the Vera Rubin Observatory’s LSST. I. Pulsating Stars in Local Group Dwarf Galaxies
Authors: Di Criscienzo M. , Leccia S. , Braga V. , Musella I. , Bono G. , Dall’Ora M. , Fiorentino G. , Marconi M. , Molinaro R. , Ripepi V. , Carrell K. , Choi Y. , Savarese S. , Schreiber L. 
Published: March 2023

Abstract
This investigation is mainly focused on the LSST Survey Strategy Optimization process, a bottom-up approach that turned out to be quite effective in involving the scientific community in the definition of the LSST observing strategy. We are mainly interested in using radial variables (RR Lyrae, classical Cepheids, long-period variables) as stellar tracers and distance indicators, and we developed a new tool called PulsationStarRecovery to quantify the recovery of the light-curve period and amplitude from an LSST-simulated time series. The outputs of this code are pulsation parameters (period, amplitude, mean magnitude) together with quantitative information concerning the difference between the shape of the light curve and template light curves. Furthermore, we apply the newborn metric to simulate LSST observations and recovery of different types of pulsating stars hosted by selected massive stellar systems (19 Local Group dwarf galaxies and the Large Magellanic Cloud) to show how the recovery changes according to distance and variable-star type. We show that this exercise is essential to understand the potential of LSST in this field since excellent recovery is necessary to optimize the use of predicted period–luminosity, period–amplitude, and color–color relations to constrain the cosmic distance scale and the metallicity distribution function of different stellar populations.
A Gap-sharing Planet Pair Shaping the Crescent in HD 163296: A Disk Sculpted by a Resonant Chain
Authors: Garrido-Deutelmoser Juan , Petrovich Cristobal , Charalambous Carolina , Guzmán Viviana V. , Zhang Ke 
Published: March 2023

Abstract
The Atacama Large Millimeter Array observations of the disk around HD 163296 have resolved a crescent-shape substructure at around 55 au, inside and off-center from a gap in the dust that extends from 38 to 62 au. In this work we propose that both the crescent and the dust rings are caused by a compact pair (period ratio ≃4:3) of sub-Saturn-mass planets inside the gap, with the crescent corresponding to dust trapped at the L
5 Lagrange point of the outer planet. This interpretation also reproduces well the gap in the gas recently measured from the CO observations, which is shallower than what is expected in a model where the gap is carved by a single planet. Building on previous works arguing for outer planets at ≈86 and ≈137 au, we provide a global model of the disk that best reproduces the data and shows that all four planets may fall into a long resonant chain, with the outer three planets in a 1:2:4 Laplace resonance. We show that this configuration is not only an expected outcome from disk–planet interaction in this system, but it can also help constrain the radial and angular position of the planet candidates using three-body resonances.
Traitement homéopathique des diarrhées chroniques non stéatosiques après pancréatectomie totale ou partielle. 2.Elaboration et utilisation d’un algorithme d’aide à la prescription pour les diarrhées en oncologie
Authors: Bagot Jean-Lionel , Fischer Isabelle , Lavallée Véronique , Orlando Paola , Lopez-Marquez Yecenia , Huerlimann Marcia , Theunissen Ingrid , Peyronnet Philippe , Véron Clothilde , Stahl Georges , Wiedemann Daniel , Wagner Jean-Philippe , Karp Jean-Claude 
Published: March 2023

Contexte : Les diarrhées se rencontrent très souvent en cas de cancer du pancréas, que ce soit de façon épisodique après certaines chimiothérapies ou de façon chronique après la chirurgie. Elles diminuent la qualité de vie, favorisent l’amaigrissement et perturbent le bon déroulement des chimiothérapies. Dénuée d’effets secondaires notables et d’interactions médicamenteuses, l’homéopathie est en Europe, la médecine complémentaire la plus utilisée en oncologie intégrative. Il n’existe pas « un » médicament homéopathique spécifique des diarrhées mais plusieurs médicaments candidats. Comment déterminer celui qui sera le mieux indiqué ? Méthodologie : Les auteurs ont étudié la physiopathologie des diarrhées dans les suites de pancréatectomie, recherché les symptômes présents chez tous les patients, effectué une répertorisation électronique, sélectionné les médicaments candidats, analysé leur matière médicale et construit un algorithme décisionnel. Résultats : Les symptômes retenus ont été : la sensation de selles impérieuses, les borborygmes intestinaux, la prédominance des diarrhées en journée, leur apparition après avoir mangé ou bu, la perte de poids. font partie des 6 médicaments principaux. Au total, 16 médicaments ont été analysés puis intégrés dans un algorithme d’aide à la décision. Conclusion :Il n’existe pas de traitement « type » de la diarrhée en oncologie. L’homéopathie pour être efficace doit être individualisée. Elle doit répondre aux règles habituelles de similitude, d’individualisation et d’infinitésimalité. La consultation de l’algorithme décisionnel permet d’orienter rapidement le prescripteur vers un ou plusieurs médicaments possibles. Si nécessaire, la matière médicale permettra de préciser le ou les choix thérapeutiques. Cet algorithme nécessite maintenant d’être expérimenté et validé par la pratique et les essais cliniques.
Le positionnement stratégique de la Turquie dans la guerre en Ukraine
Authors: Pouvreau Ana 
Published: March 2023

La Turquie entretient des liens étroits avec l’Ukraine, notamment en y exportant des armements dont les drones Bayraktar . Cependant, Ankara s’efforce également de pouvoir jouer un rôle de médiateur avec Moscou, avec plus ou moins d’efficacité. Le séisme du 6 février 2023 risque néanmoins de freiner ces prises d’initiatives diplomatiques.
Prevalence and associated factors of mortality after percutaneous coronary intervention for adult patients with ST-elevation myocardial infarction: A systematic review and meta-analysis
Authors: Yan Fanghong , Zhang Yuanyuan , Pan Yayan , Li Sijun , Yang Mengqi , Wang Yutan , Yanru Chen , Su Wenli , Ma Yuxia , Han Lin 
Published: March 2023

Background:
There is a paucity of systematic reviews on the associated factors of mortality among ST-elevation myocardial infarction (STEMI) patients after percutaneous coronary intervention (PCI). This meta-analysis was designed to synthesize available evidence on the prevalence and associated factors of mortality after PCI for adult patients with STEMI.

Materials and Methods:
Databases including the Cochrane Library, PubMed, Web of Science, Embase, Ovid, Scopus, ProQuest, MEDLINE, and CINAHL Complete were searched systematically to identify relevant articles published from January 2008 to March 2020 on factors affecting mortality after PCI in STEMI patients. Meta-analysis was conducted using Stata 12.0 software package.

Results:
Our search yielded 91 cohort studies involving a total of 199, 339 participants. The pooled mortality rate for STEMI patients after PCI was 10%. After controlling for grouping criteria or follow-up time, the following 17 risk factors were significantly associated with mortality for STEMI patients after PCI: advanced age (odds ratio [OR] = 3.89), female (OR = 2.01), out-of-hospital cardiac arrest (OR = 5.55), cardiogenic shock (OR = 4.83), renal dysfunction (OR = 3.50), admission anemia (OR = 3.28), hyperuricemia (OR = 2.71), elevated blood glucose level (OR = 2.00), diabetes mellitus (OR = 1.8), chronic total occlusion (OR = 2.56), Q wave (OR = 2.18), without prodromal angina (OR = 2.12), delay in door-to-balloon time (OR = 1.72), delay in symptom onset-to-balloon time (OR = 1.43), anterior infarction (OR = 1.66), ST-segment resolution (OR = 1.40), and delay in symptom onset-to-door time (OR = 1.29).

Conclusion:
The pooled prevalence of mortality after PCI for STEMI patients was 10%, and 17 risk factors were significantly associated with mortality for STEMI patients after PCI.
Predictors of biliary atresia outcome: Saudi National Study (2000 – 2018)
Authors: Abanemai Mohammed , AlEdreesi Mohammed , Al Sarkhy Ahmed , Saadah Omar I. , Alhebbi Homoud , Bader Razan , Alhatlani Maher , Halabi Hana , Aladsani Ahmed , Wali Sami , Alguofi Talal , Alsayed Fahad , NasserAllah Amira , Almehmadi Ahmed , Qurban Afnan , Bashir Muhammed Salman , Alamri Aisha , Al-Hussaini Abdulrahman 
Published: March 2023

Abstract

Background:
Outcomes in biliary atresia (BA) have been well-documented in large national cohorts from Europe, North America, and East Asia. Understanding the challenges that preclude success of the Kasai portoenterostomy (KPE) is the key to improve the overall outcomes of BA and implementing intervention strategies. Here, we analyzed the data from the Saudi national BA study (204 BA cases diagnosed between 2000 and 2018) to identify the prognostic factors of BA outcomes.

Methods:
One hundred and forty-three cases underwent KPE. Several prognostic factors (center case load, congenital anomalies, serum gamma-glutamyl transferase, use of steroids, ascending cholangitis post-operatively, and degree of portal fibrosis at time of KPE) were investigated and correlated with the primary outcomes of interest: 1) success of KPE (clearance of jaundice and total serum bilirubin <20 mmol/l after KPE), 2) survival with native liver (SNL), and 3) overall survival.

Results:
Use of steroids after KPE was associated with clearance of jaundice, 68% vs. 36.8% in the BA cases that did not receive steroids (P = 0.013; odds ratio 2.5) and a significantly better SNL rate at 2 - and 10-year of 62.22% and 57.77% vs. 39.47% and 31.57%, respectively (P = 0.01). A better 10-year SNL was observed in centers with caseload <1/year (group 1) as compared to centers that performed ≥1/year (group 2) [45.34% vs. 26.66%, respectively; P = 0.047]. On comparison of the 2 groups, cases in group 1 had KPE at significantly earlier age (median 59.5 vs. 75 days, P = 0.006) and received steroids after KPE more frequently than group 2 (69% vs. 31%, P < 0.001). None of the remaining prognostic variables were identified as being significantly related to BA outcome.

Conclusion:
Steroids use post-KPE predicted clearance of jaundice and better short- and long-term SNL. There is a need to establish a national BA registry in Saudi Arabia aiming to standardize the pre- and post-operative clinical practices and facilitate clinical and basic research to evaluate factors that influence BA outcome.