bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the displacement of areas of concentration of traffic accidents in space and time within the boundaries of the Volga basin
Authors: Домнина О.Л. 
Published: March 2022

Данная работа является продолжением статьи авторов 2020 года. В статье рассматриваются задачи по определению границ участков концентрации транспортных происшествий в пределах территории Волжского бассейна. Для этого созданы в границах Волжского бассейна три базы данных по транспортным происшествиям: с периодами наблюдений 1980-2008, 2007-2018 и 1980-2018 лет. Для определения границ участков концентрации транспортных происшествий применялся расчет плотности транспортных происшествий на участках, сопоставление полученных данных с усредненными и распределения плотности происшествий. В результате выполненной работы были не только определены границы участков по каждому периоду, но и проанализировано изменение границ участков во времени. В работе также введено понятие смещения участков концентрации и прописана методика его определения. Анализ смещения участков концентрации транспортных происшествий позволил разработать классификацию опасных участков, сделать предложения по учету временного фактора при анализе статистических данных для совершенствования методик анализа риска транспортных происшествий и разработке системы мер реагирования.
This work is a continuation of the article by the authors of 2020, which considers the tasks of determining the boundaries of areas of concentration of traffic accidents within the territory of the Volga basin. For this, three databases on transport accidents have been created within the boundaries of the Volga basin: with observation periods of 1980-2008, 2007-2018 and 1980-2018. To determine the boundaries of the concentration areas of traffic accidents, the calculation of the density of traffic accidents at the sections, comparison of the obtained data with the averaged ones and the distribution of the density of accidents were used. As a result of the work performed, the boundaries of the plots were not only determined for each period, but also the change in the boundaries of the plots in time was analyzed. The work also introduces the concept of displacement of concentration sites and spelled out a method for its determination. The analysis of the displacement of the concentration areas of transport accidents made it possible to develop a classification of hazardous areas, to make proposals for taking into account the time factor in the analysis of statistical data to improve the methods for analyzing the risk of traffic accidents and to develop a system of response measures of statistical data to clarify the methods for analyzing the risk of traffic accidents and develop a response system.
Fuzzy model of decision support system for ship’s speed management in case of ship is following the optimal predicted path
Authors: Филатов В.И. 
Published: March 2022

Для выработки приближённого решения в классе задач о поиске оптимального пути судна, могут быть применены методы динамического программирования и дискретной оптимизации на графах. С точки зрения судовождения, такие решения представляют собой стратегию «менеджмента курсов». Реальная стратегия плавания судна по линии заданного пути (ЛЗП) включает в себя также управление скоростью судна. В настоящее время не существует единого подхода к решению этой задачи. В данной статье предлагается рассмотреть модель системы поддержки принятия решений (СППР), которая позволяет выработать решение об изменении текущего режима эксплуатации главной судовой энергетической установки (ГСЭУ), а именно изменить число RPM (оборотов в минуту).В данной статье использован математический аппарат нечётких функций и нечёткой логики при построении модели СППР. В случае выработки решения об изменении RPM, на основании мониторинга текущего состояния судна, возникает ещё одна проблема – при изменении скорости судна оптимальный путь, найденный на этапе планирования перехода не является больше таковым, в связи с этим необходимо выработать решение о целесообразности его перестроения. Методология решения этих проблем представлена в данной работе.
The dynamic Programming and discrete Optimization based on Graphs Theory could be used in order to solve the problem of Ship’s Path Optimization. In terms of Ship’s handling and maneuvering such results should be interpreted as “Course Management”. Actual Strategy of Ship’s Sailing on Targeted Line of Sailing includes Ship’s Speed Management. There is no universal solvation of this task. In this article described Decision Support System (DSS), which can generate the decision to change the mode exploitation of Main Engine, for instance: change its RPM. The mathematical model of Fuzzy Functions and Fuzzy Sets had been used to create such DSS ME. In case of determination the decision of RPM alteration the previous Path should not be used as Targeted due to prevailing condition, thus it is problem to be solved also. Thus, The Optimization of the Path should be re-calculated. The methodology of abovementioned problems is stated in this article.
ЕXPERIENCE OF LONG-TERM APPLICATION OF PERCUTANEOUS ENDOSCOPIC MICROGASTROSTOMY AS A METHOD OF ENTERIAL AND THERAPEUTIC PROVISION OF PATIENTS
Authors: Bilalov I. V. 
Published: March 2022

Purpose. Analysis of surgical aspects of the experience of 13 years of percutaneous endoscopic microgastrostomy for enteral therapeutic provision of patients with parkinsonism.Methods. The 4-year follow-up group (2012-2021) included 20 patients aged 55 to 72 years with severe Parkinson's disease, mostly men. From 2008 to 2012, patients underwent microgastrostomy installation using a Frezenius kit. Levodopa carbidopa was injected into the jejunum through a micro-drainage gastrostomy.Results. During the 1st year of gastrostomy functioning, the following complications developed: gastric juice leakage onto the skin with the skin maceration development (2 cases), the hypergranulation development around the gastrostomy (3 cases), the gastrostomy support ring prolapse into subcutaneous fat with an abscess development (2 patients). By the end of the 4th year follow-up, 3 more patients had gastrostomy prolapse into subcutaneous tissue without suppuration. On the micro-drainage part complications were observed in the form of the bezoar formation at the tube end and micro-drainage nodulation in the stomach with the lumen obturation. The author used different methods of prevention and complications treatment in each individual case. To prevent gastric juice leakage and the proliferation of hypergranulations, tube fixation correction and local treatment are necessary; to prevent prolapse of the gastrostomy support ring, it is advisable to use a prolene mesh gasket. A gastrostomy change l with proper care is advisable 1 time in 3-4 years, micro-drainage at least 1 time in 2 years to prevent the bezoar formation on the catheter and its rupture.Conclusion. Puncture microgastrostomy performed under endoscopic control can be effectively used for a long time to inject nutritional mixtures and medicines into the gastrointestinal tract.
EFFICIENCY PORTAL VEIN X-RAY VASCULAR EMBOLIZATION IN EXTENDED HEPATIC RESECTION
Authors: Nartailakov M. A. , Galimov I. I. , Shakurov D. F. , Loginov M. O. , Mirasova G. Kh. 
Published: March 2022

Relevance. To evaluate the effectiveness of X-ray endovascular embolization of the portal vein branch in terms of preparation for extensive liver resections. Materials and methods. A retrospective analysis of 74 right-sided hemihepatectomies performed in one stage (classical, n = 54) or in two stages (X-ray endovascular embolization of the right portal vein followed by liver resection was performed, n = 20).Results. X-ray endovascular embolization of the right portal vein was accompanied by a significant increase in the planned liver remainder by an average of 37.3 %. This made it possible to reduce the volume of intraoperative blood loss, the incidence of postresection hepatic failure from 43.1 to 15.9 %, and postoperative mortality from 9.3 to 5.0 %.Conclusions. Preoperative X-ray endovascular embolization of the right portal vein leads to vicarious enlargement of the left lobe of the liver. This makes it possible to reliably reduce the incidence of post-resection hepatic failure after right-sided hemihepatectomy and, accordingly, reduce the frequency of deaths.
INTRAOPERATIVE AND POSTOPERATIVE COMPLICATIONS IN SURGICAL TREATMENT OF NODULAR AND MULTINODULAR FORMS OF THE EUTHYROID GOITER
Authors: Zarivchatsky M. F. , Samarcev V. A. , Volkov Yu. V. , Denisov S. A. , Amarantov D. G. , Teplykh N. S. 
Published: March 2022

Intra- and postoperative complications in the surgical treatment of nodular and multinodular euthyroid goiter make up from 0.3 to 8.0% of the number of operated patients. Depending on the clinical picture, data of morphological, radiation, laboratory studies, various types of surgical interventions are used. The objective was to analyze the causes and search for ways to prevent and treat the ntraoperative and postoperative complications in the surgical treatment of patients with nodular and multinodular euthyroid goiter. Methods and materials. There was conducted the analysis of the techniques and results of surgical treatment of 303 patients with nodular euthyroid goiter and 377 patients with multinodular euthyroid goiter, divided into two groups: the main group (352 patients) and comparison (328 patients). Results. The immediate and long-term results of the treatment of patients were studied with the detailing of specific and nonspecific complications by groups. Methods for optimizing diagnostic and treatment technologies have been developed, immediate and long-term results of treatment have been evaluated. Conclusion. The use of improved technologies has reduced the number of intraoperative and postoperative complications and improved treatment results.
OUTCOMES OF FIXATION METACARPAL FRACTURES USING BIOABSORBABLE IMPLANTS
Authors: Ratyev A. P. , Liadova M. V. , Skvortsova M. A. , Badriev D. A. , Chin Vo X. P. 
Published: March 2022

Introduction. Tactics of treatment of fractures of the metacarpal bones are sufficiently covered in domestic and foreign literature, however, the search for modern methods of the most effective fixation of fractures of the hand bones is still ongoing. The fixator should ensure the stability of bone fragments, have sufficient strength and undergo biodegradation after fusion, eliminate the need for repeated surgery. Purpose of the study: to evaluate results of fixation of 2-5 metacarpal fractures using bioabsorbable implants.Materials and methods: there was a retrospective study of 40 patients who had displaced closed fractures of 2-5 metacarpal bones. We performed surgical treatment: open reduction of the metacarpal fracture and internal fixation with bioabsorbable implants (Bioretec Activa Pin). Patients were examined before, 3 and 12 months after surgery.Results: All patients had union of metacarpal fracture 3 months after surgery. The function of the hand has improved, when evaluated on the DASH scale from 62 to 9.2 (p≤0.05). The pain level (VAS) was significantly decreased from 72 to 13.5 (p≤0.05). All parameters were comparable by 12 months after surgery.Conclusions: bioabsorbable implants are reliable way for internal fixation of fractures of 2-5 metacarpal bones with displaced fragments. Method is no need to remove the fixator.
The High Latitude Spectroscopic Survey on the Nancy Grace Roman Space Telescope
Authors: Wang Yun , Zhai Zhongxu , Alavi Anahita , Massara Elena , Pisani Alice , Benson Andrew , Hirata Christopher M. , Samushia Lado , Weinberg David H. , Colbert James , Doré Olivier , Eifler Tim , Heinrich Chen , Ho Shirley , Krause Elisabeth , Padmanabhan Nikhil , Spergel David , Teplitz Harry I. 
Published: March 2022

Abstract
The Nancy Grace Roman Space Telescope will conduct a High Latitude Spectroscopic Survey (HLSS) over a large volume at high redshift, using the near-IR grism (1.0–1.93 μm, R = 435–865) and the 0.28 deg2 wide-field camera. We present a reference HLSS that maps 2000 deg2 and achieves an emission-line flux limit of 10−16 erg s−1 cm−2 at 6.5σ, requiring ∼0.6 yr of observing time. We summarize the flowdown of the Roman science objectives to the science and technical requirements of the HLSS. We construct a mock redshift survey over the full HLSS volume by applying a semianalytic galaxy formation model to a cosmological N-body simulation and use this mock survey to create pixel-level simulations of 4 deg2 of HLSS grism spectroscopy. We find that the reference HLSS would measure ∼10 million Hα galaxy redshifts that densely map large-scale structure at z = 1–2 and 2 million [O iii] galaxy redshifts that sparsely map structures at z = 2–3. We forecast the performance of this survey for measurements of the cosmic expansion history with baryon acoustic oscillations and the growth of large-scale structure with redshift-space distortions. We also study possible deviations from the reference design and find that a deep HLSS at f
line > 7 × 10−17 erg s−1 cm−2 over 4000 deg2 (requiring ∼1.5 yr of observing time) provides the most compelling stand-alone constraints on dark energy from Roman alone. This provides a useful reference for future optimizations. The reference survey, simulated data sets, and forecasts presented here will inform community decisions on the final scope and design of the Roman HLSS.
Physical Properties of the Host Galaxies of Ca-rich Transients
Authors: Dong 董 Yuxin 雨欣 , Milisavljevic Dan , Leja Joel , Sarbadhicary Sumit K. , Nugent Anya E. , Margutti Raffaella , Jacobson-Galán Wynn V. , Polin Abigail , Banovetz John , Reynolds Jack M. , Subrayan Bhagya 
Published: March 2022

Abstract
Calcium-rich (Ca-rich) transients are a new class of supernovae (SNe) that are known for their comparatively rapid evolution, modest peak luminosities, and strong nebular calcium emission lines. Currently, the progenitor systems of Ca-rich transients remain unknown. Although they exhibit spectroscopic properties not unlike core-collapse Type Ib/c SNe, nearly half are found in the outskirts of their host galaxies, which are predominantly elliptical, suggesting a closer connection to the older stellar populations of SNe Ia. In this paper, we present a compilation of publicly available multiwavelength observations of all known and/or suspected host galaxies of Ca-rich transients ranging from far-UV to IR, and use these data to characterize their stellar populations with prospector. We estimate several galaxy parameters including integrated star formation rate, stellar mass, metallicity, and age. For nine host galaxies, the observations are sensitive enough to obtain nonparametric star formation histories, from which we recover SN rates and estimate probabilities that the Ca-rich transients in each of these host galaxies originated from a core-collapse versus Type Ia-like explosion. Our work supports the notion that the population of Ca-rich transients do not come exclusively from core-collapse explosions, and must either be only from white dwarf stars or a mixed population of white dwarf stars with other channels, potentially including massive star explosions. Additional photometry and explosion site spectroscopy of larger samples of Ca-rich host galaxies will improve these estimates and better constrain the ratio of white dwarf versus massive star progenitors of Ca-rich transients.
A Census of 163 Large-scale (≥10 pc), Velocity-coherent Filaments in the Inner Galactic Plane: Physical Properties, Dense-gas Fraction, and Association with Spiral Arms
Authors: Ge Yifei , Wang Ke 
Published: March 2022

Abstract
The interstellar medium has a highly filamentary and hierarchical structure that may play a significant role in star formation. A systematical study of the large-scale filaments toward their physical parameters, distribution, structures, and kinematics will inform us about which types of filaments have the potential to form stars, how the material feeds protostars through filaments, and the connection between star formation and Galactic spiral arms. Unlike the traditional by-eye searches, we use a customized minimum spanning tree algorithm to identify filaments by linking Galactic clumps from the APEX Telescope Large Area Survey of the Galaxy catalog. In the inner Galactic plane (∣l∣ < 60°), we identify 163 large-scale filaments with physical properties derived, including the dense-gas mass fraction, and we compare them with an updated spiral arm model in position–position–velocity space. The dense-gas mass fraction is found not to differ significantly in various Galactic positions or in different spiral arms. We also find that most filaments are interarm filaments after adding a distance constraint, and filaments in arms differ a little with those not in arms. One surprising result is that clumps on and off filaments have no significant distinction in their mass at the same size.
Spin Evolution of Stellar-mass Black Holes Embedded in AGN Disks: Orbital Eccentricity Produces Retrograde Circumstellar Flows
Authors: Li 李 Ya-Ping 亚平 , Chen 陈 Yi-Xian 逸贤 , Lin 林 Douglas N. C. 潮 , Wang 王 Zhuoxiao 卓骁 
Published: March 2022

Abstract
The spin evolution of stellar-mass black holes (sBHs) embedded in AGN accretion disks is an important process relevant to the production of gravitational waves from binary BH (BBH) merger events through the AGN channel. Because embedded sBHs are surrounded by circumstellar disks (CSDs), the rotation of CSD gas flows determines the direction of the angular momentum it accretes. In this Letter, we use global 2D hydrodynamic simulations to show that while a disk-embedded sBH on a circular orbit transforms the initial retrograde Keplerian shear of the background accretion disk into a prograde CSD flow, as in the classical picture of companion-disk interaction theory, moderate orbital eccentricity could disrupt the steady-state tidal perturbation and preserve a retrograde CSD flow around the sBH. This switch in CSD orientation occurs at a transition eccentricity that scales nearly proportional to the local sound speed. This bifurcation in the CSD flow and thereafter spin-up direction of SBHs leads to the formation of a population of nearly antialigned sBHs and should be incorporated in future population models of sBH and BBH evolutions.
Analysis of a JWST NIRSpec Lab Time Series: Characterizing Systematics, Recovering Exoplanet Transit Spectroscopy, and Constraining a Noise Floor
Authors: Rustamkulov Zafar , Sing David K. , Liu Rongrong , Wang Ashley 
Published: March 2022

Abstract
The James Webb Space Telescope’s (JWST) NIRSpec instrument will unveil the nature of exoplanet atmospheres across the wealth of planet types, from temperate terrestrial worlds to ultrahot Jupiters. In particular, the 0.6–5.3 μm PRISM mode is especially well suited for efficient spectroscopic exoplanet observations spanning a number of important spectral features. We analyze a lab-measured NIRSpec PRISM mode Bright Object Time Series observation from the perspective of a JWST user to understand the instrument performance and detector properties. We create two realistic transiting exoplanet time-series observations by performing injection-recovery tests on the lab-measured data to quantify the effects of real instrument jitter, drift, intrapixel sensitivity variations, and 1/f noise on measured transmission spectra. By fitting the time-series systematics simultaneously with the injected transit, we can obtain more realistic transit-depth uncertainties that take into account noise sources that are currently not modeled by traditional exposure time calculators. We find that sources of systematic noise related to intrapixel sensitivity variations and point-spread function motions are apparent in the data at the level of a few hundred ppm but can be effectively detrended using a low-order polynomial with detector position. We recover the injected spectral features of GJ 436 b and TRAPPIST-1 d and place a 3σ upper limit on the detector noise floor of 14 ppm. We find that the noise floor is consistent with <10 ppm at the 1.7σ level, which bodes well for future observations of challenging targets with faint atmospheric signatures.
The Local Group Mass in the Light of Gaia
Authors: Benisty David , Vasiliev Eugene , Evans N. Wyn , Davis Anne-Christine , Hartl Odelia V. , Strigari Louis E. 
Published: March 2022

Abstract
High-accuracy proper motions (PMs) of M31 and other Local Group (LG) satellites have now been provided by the Gaia satellite. We revisit the timing argument to compute the total mass M of the LG from the orbit of the Milky Way and M31, allowing for the cosmological constant. We rectify a systematic effect caused by the presence of the Large Magellanic Cloud (LMC). The interaction of the LMC with the Milky Way induces a motion toward the LMC. This contribution to the measured velocity of approach of the Milky Way and M31 must be removed. We allow for cosmic bias and scatter by extracting correction factors tailored to the accretion history of the LG. The distribution of correction factors is centered around 0.63 with a scatter of ±0.2, indicating that the timing argument significantly overestimates the true mass. Adjusting for all these effects, the estimated mass of the LG is

M
=

3.4

−
1.1

+
1.4

×

10

12

M

⊙

(68% CL) when using the M31 tangential velocity,

v

tan

=

82

−
35

+
38

km

s

−
1

. Lower tangential velocity models with

v

tan

=

59

−
38

+
42

km

s

−
1

(derived from the same PM data with a flat prior on the tangential velocity) lead to an estimated mass of

M
=

3.1

−
1.0

+
1.3

×

10

12

M

⊙

(68% CL). By making an inventory of the total mass associated with the four most substantial LG members (the Milky Way, M31, M33, and the LMC), we estimate the known mass to be in the range

3.7

−
0.5

+
0.5

×

10

12

M

⊙

.
The Far UV Variability of τ Her (HD 147394) Recorded by IUE
Authors: Monier Richard 
Published: March 2022

Abstract
Evidence is presented that the far-ultraviolet flux of τ Her recorded by the International Ultraviolet Explorer is variable in a series of six spectra taken consecutively over 4 hr and 45 minutes The centroids of the resonance lines of O i, C ii and Si ii are blueshifted in several spectra and resume their original positions over a timescale of 3 hr 5 minutes. The FUV flux also varies over the same timescale. The far-ultraviolet variability is discussed in light of the recent TESS lightcurve observed for τ Her.
Dirigeant et DRH en PME : Une double casquette difficile à porter !
Authors: Joyeau Anne , Le Gall Sébastien , Poilpot-Rocaboy Gwénaëlle 
Published: March 2022

Qu’est-ce que le métier de dirigeant de PME ? Nous proposons ici une étude qualitative, réalisée auprès de quinze dirigeants, pour identifier les contours de ce métier. Cette étude confirme, d’une part, la diversité du profil des dirigeants ainsi que la complexité et la polyvalence de leur métier. Elle met en avant, d’autre part, l’importance perçue par les dirigeants de la dimension RH de leur métier, tout en révélant leur difficulté à l’assurer tant d’un point vue stratégique, managérial qu’instrumental. Cette contribution questionne de ce fait le besoin de compétences des dirigeants en matière de GRH et les stratégies possibles pour les acquérir.