bluuebunny/crossref_metadata_2025_split huggingface dataset:
ASSESSMENT OF THE INFLUENCE OF INDICATORS OF RELIABILITY HELICOPTER SAFETY Ми-8МСБ, Ми-8MT(MTВ) ON SAFETY PERFORMANCE FOR 2017-2021
Authors: Golub V. , Akimov O. , Boyarov V. , Zhdanyuk M. , Kholodnyi R. 
Published: July 2022

The article offers a complex approach to determination of long-term trends of quantitative indicators of safety of flights of helicopters Mi-8MSB-V and Mi-8MT (MTV) and influence on them of operational reliability.
The integrated approach is to determine the impact of the failure of the functional systems of helicopters on operational reliability and flight safety: average failure rate, mean failure rate, probability of helicopter flight reliability in one hour, Average aircraft accident, probability of absence.
Proposals have been developed to improve the reliability and safety of helicopter flights based on information about the technical condition during military operation, which will allow adjusting the terms of maintenance, repair, extending the service life and provide for areas for upgrading aviation equipment.
In order to take into account objectively the impact of helicopter systems on the reliability and safety of aircraft equipment flights, information on the flight hours of aircraft equipment should be provided, taking into account the level of functional systems upgrade. Recommendations for improving flight safety and reliability of elements of helicopter systems limiting the reliability of aviation equipment are given.
RESOURCES, SERVICE LIFE AND ASSESSMENT OF THE RESIDUAL LIFE OF MI-8 HELICOPTER REDUCERS
Authors: Pilipenko O. , Kohan V. , Vusatui Y. , Zhurakhov O. , Sivoraksha D. 
Published: July 2022

The resources and service life of Mi-8 helicopters, produced back in the late 70s – early 80s of the last century and designed for 35 years of operation, have long been exhausted. Therefore, it is quite expedient to switch to the operation of the existing fleet of these helicopters according to their technical condition. Such a transition is confirmed by the experience of operating similar aircraft by the leading world powers.
The presented extended resources and service life up to the 1st overhaul, overhaul and designated main, intermediate and tail gearboxes of Mi-8 helicopters and their modifications in accordance with the relevant bulletins and decisions to clarify them, make it possible to extend the operation of the existing fleet of helicopters according to their technical condition.
The possibility of estimating the residual life by the values of the boundary and current levels of vibration of the main gearbox VR-14 is shown, for the initial data of which the experimental results of measuring a particular gearbox are used.
The Airborne Infrared Spectrometer: Development, Characterization, and the 2017 August 21 Eclipse Observation
Authors: Samra Jenna E. , Marquez Vanessa , Cheimets Peter , DeLuca Edward E. , Golub Leon , Hannigan James W. , Madsen Chad A. , Vira Alisha , Adams Arn 
Published: July 2022

Abstract
On 2017 August 21, the Airborne Infrared Spectrometer (AIR-Spec) observed the total solar eclipse at an altitude of 14 km from aboard the NSF/NCAR Gulfstream V research aircraft. The instrument successfully observed the five coronal emission lines that it was designed to measure: Si x 1.431 μm, S xi 1.921 μm, Fe ix 2.853 μm, Mg viii 3.028 μm, and Si ix 3.935 μm. Characterizing these magnetically sensitive emission lines is an important first step in designing future instruments to monitor the coronal magnetic field, which drives space weather events, as well as coronal heating, structure, and dynamics. The AIR-Spec instrument includes an image stabilization system, feed telescope, grating spectrometer, and slit-jaw imager. This paper details the instrument design, optical alignment method, image processing, and data calibration approach. The eclipse observations are described and the available data are summarized.
Suspicious Siblings: The Distribution of Mass and Spin across Component Black Holes in Isolated Binary Evolution
Authors: Zevin Michael , Bavera Simone S. 
Published: July 2022

Abstract
The LIGO and Virgo gravitational-wave detectors have uncovered binary black hole systems with definitively nonzero spins, as well as systems with significant spin residing in the more massive black hole of the pair. We investigate the ability of isolated binary evolution in forming such highly spinning, asymmetric-mass systems through both accretion onto the first-born black hole and tidal spin-up of the second-born black hole using a rapid population synthesis approach with detailed considerations of spin-up through tidal interactions. Even with the most optimistic assumptions regarding the efficiency at which an accreting star receives material from a donor, we find that it is difficult to form systems with significant mass asymmetry and moderate or high spins in the primary black hole component. Assuming efficient angular momentum transport within massive stars and Eddington-limited accretion onto black holes, we find that >1.5% of systems in the underlying binary black hole population have a primary black hole spin greater than 0.2 and a mass asymmetry of greater than 2:1 in our most optimistic models, with most models finding that this criteria is only met in ∼0.01% of systems. The production of systems with significant mass asymmetries and spin in the primary black hole component is thus an unlikely byproduct of isolated evolution unless highly super-Eddington accretion is invoked or angular momentum transport in massive stars is less efficient than typically assumed.
Down but Not Out: Properties of the Molecular Gas in the Stripped Virgo Cluster Early-type Galaxy NGC 4526
Authors: Young Lisa M. , Meier David S. , Crocker Alison , Davis Timothy A. , Topal Selçuk 
Published: July 2022

Abstract
We present Atacama Large Millimeter/submillimeter Array data on the 3 mm continuum emission, CO isotopologues (12CO, 13CO, and C18O), and high-density molecular tracers (HCN, HCO+, HNC, HNCO, CS, CN, and CH3OH) in NGC 4526. These data enable a detailed study of the physical properties of the molecular gas in a longtime resident of the Virgo Cluster; comparisons to more commonly studied spiral galaxies offer intriguing hints into the processing of molecular gas in the cluster environment. Many molecular line ratios in NGC 4526, along with our inferred abundances and CO/H2 conversion factors, are similar to those found in nearby spirals. One striking exception is the very low observed 12CO/13CO(1−0) line ratio, 3.4 ± 0.3, which is unusually low for spirals though not for Virgo Cluster early-type galaxies. We carry out radiative transfer modeling of the CO isotopologues with some archival (2−1) data, and we use Bayesian analysis with Markov Chain Monte Carlo techniques to infer the physical properties of the CO-emitting gas. We find surprisingly low [12CO/13CO] abundance ratios of

7.8

−
1.5

+
2.7

and

6.5

−
1.3

+
3.0

at radii of 0.4 kpc and 1 kpc. The emission from the high-density tracers HCN, HCO+, HNC, CS, and CN is also relatively bright, and CN is unusually optically thick in the inner parts of NGC 4526. These features hint that processing in the cluster environment may have removed much of the galaxy’s relatively diffuse, optically thinner molecular gas along with its atomic gas. Angular momentum transfer to the surrounding intracluster medium may also have caused contraction of the disk, magnifying radial gradients such as we find in [13CO/C18O]. More detailed chemical evolution modeling would be interesting in order to explore whether the unusual [12CO/13CO] abundance ratio is entirely an environmental effect or whether it also reflects the relatively old stellar population in this early-type galaxy.
Principal-axis Analysis of the Eddington Tensor for the Early Post-bounce Phase of Rotational Core-collapse Supernovae
Authors: Iwakami Wakana , Harada Akira , Nagakura Hiroki , Akaho Ryuichiro , Okawa Hirotada , Furusawa Shun , Matsufuru Hideo , Sumiyoshi Kohsuke , Yamada Shoichi 
Published: July 2022

Abstract
Using full Boltzmann neutrino transport, we performed 2D core-collapse supernova simulations in axisymmetry for two progenitor models with 11.2 and 15.0 M
⊙, both rotational and nonrotational. We employed the results obtained in the early post-bounce phase (t ≲ 20 ms) to assess performance under rapid rotation of some closure relations commonly employed in the truncated moment method. We first made a comparison in 1D under spherical symmetry, though, of the Eddington factor p defined in the fluid rest frame (FR). We confirmed that the maximum entropy closure for the Fermionic distribution (MEFD) performs better than others near the proto–neutron star surface, where p < 1/3 occurs, but does not work well even in 1D when the phase-space occupancy satisfies e < 0.5 together with p < 1/3, the condition known to be not represented by MEFD. For the 2D models with the rapid rotation, we employed the principal-axis analysis of the Eddington tensor. We paid particular attention to the direction of the longest principal axis. We observed in FR that it is aligned neither with the radial direction nor with the neutrino flux in 2D, particularly so in convective and/or rapidly rotating regions, the fact not accommodated in the moment method. We repeated the same analysis in the laboratory frame and found again that the direction of the longest principal axis is not well reproduced by MEFD because the interpolation between the optically thick and thin limits is not very accurate in this frame.
The X-shaped Radio Galaxy J0725+5835 is Associated with an AGN Pair
Authors: Yang Xiaolong , Ji Jialu , Joshi Ravi , Yang Jun , An Tao , Wang Ran , Ho Luis C. , Roberts David H. , Saripalli Lakshmi 
Published: July 2022

Abstract
X-shaped radio galaxies (XRGs) are those that exhibit two pairs of unaligned radio lobes (main radio lobes and wings). One of the promising models for the peculiar morphology is jet reorientation. To clarify this, we conducted a 5 GHz observation with the European VLBI Network (EVN) of XRG J0725+5835, which resembles the archetypal binary active galactic nuclei (AGNs) 0402+379 in radio morphology, but it is larger in angular size. In our observation, two milliarcsecond-scale radio components with nonthermal radio emission are detected. Each of them coincides with an optical counterpart with similar photometric redshift and (optical and infrared) magnitude, corresponding to dual active nuclei. Furthermore, with the improved Very Large Array (VLA) images, we find a bridge between the two radio cores and a jet bending in the region surrounding the companion galaxy. This further supports the interplay between the main and companion galaxies. In addition, we also report the discovery of an arcsecond-scale jet in the companion. Given the projected separation of ∼100 kpc between the main and companion galaxies, XRG J0725+5835 is likely associated with a dual jetted-AGN system. In both EVN and VLA observations, we find signatures that the jet is changing its direction, which is likely responsible for the X-shaped morphology. For the origin of jet reorientation, several scenarios are discussed.
Fine Structures of the Inner Solar Corona and the Associated Magnetic Topology
Authors: Ko Yuan-Kuen , Stenborg Guillermo , Linker Jon , Weberg Micah J. , Lionello Roberto , Titov Viacheslav 
Published: July 2022

Abstract
We present the fine structure of the inner solar corona between 1.65 and 3.0 solar radii as revealed by the STEREO-A COR1 white-light coronagraph from 2008 June 20 to July 31. The COR1 imaging data were wavelet processed to enhance the intensity contrast of coronal features. The constructed limb synoptic maps at a range of altitudes show the evolution in time and altitude of these fine structures within the streamer belt, and equatorial and polar coronal holes during this period near the solar minimum. Distinct streamer-stalk structures are seen embedded within a diffuse background of the helmet streamer belt, which are preserved as they extend to higher heights. Pseudostreamers are also seen as multiple stalk structures, which also continue to higher heights. Various polar plume structures are seen to last from hours to days. Similar plume structures are also seen within the corona subtended by equatorial coronal holes. We compare the COR1 maps to that of the magnetic topology revealed by the modeled squashing factors, and discuss the relation between the two types of maps and its implications in the context of solar wind formation.
Supplement: “An Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing” (2022, ApJL, 933, L23)
Authors: Lam Casey Y. , Lu Jessica R. , Udalski Andrzej , Bond Ian , Bennett David P. , Skowron Jan , Mróz Przemek , Poleski Radek , Sumi Takahiro , Szymański Michał K. , Kozłowski Szymon , Pietrukowicz Paweł , Soszyński Igor , Ulaczyk Krzysztof , Wyrzykowski Łukasz , Miyazaki Shota , Suzuki Daisuke , Koshimoto Naoki , Rattenbury Nicholas J. , Hosek Matthew W. , Abe Fumio , Barry Richard , Bhattacharya Aparna , Fukui Akihiko , Fujii Hirosane , Hirao Yuki , Itow Yoshitaka , Kirikawa Rintaro , Kondo Iona , Matsubara Yutaka , Matsumoto Sho , Muraki Yasushi , Olmschenk Greg , Ranc Clément , Okamura Arisa , Satoh Yuki , Silva Stela Ishitani , Toda Taiga , Tristram Paul J. , Vandorou Aikaterini , Yama Hibiki , Abrams Natasha S. , Agarwal Shrihan , Rose Sam , Terry Sean K. 
Published: July 2022

Abstract
This supplement provides supporting material for Lam et al. We briefly summarize past gravitational microlensing searches for black holes (BHs) and present details of the observations, analysis, and modeling of five BH candidates observed with both ground-based photometric microlensing surveys and Hubble Space Telescope astrometry and photometry. We present detailed results for four of the five candidates that show no or low probability for the lens to be a BH. In these cases, the lens masses are <2 M
⊙, and two of the four are likely white dwarfs or neutron stars. We also present detailed methods for comparing the full sample of five candidates to theoretical expectations of the number of BHs in the Milky Way (∼108).
VALENTInE: A Concept for a New Frontiers–Class Long-duration In Situ Balloon-based Aerobot Mission to Venus
Authors: Arredondo Anicia , Hodges Amorée , Abrahams Jacob N. H. , Bedford Candice C. , Boatwright Benjamin D. , Buz Jennifer , Cantrall Clayton , Clark Joanna , Erwin Andrew , Krishnamoorthy Siddharth , Magaña Lizeth , McCabe Ryan M. , McIntosh E. Carrie , Noviello Jessica L. , Pellegrino Marielle , Ray Christine , Styczinski Marshall J. , Weigel Peter 
Published: July 2022

Abstract
Described here is a concept for a variable-altitude aerobot mission to Venus developed as part of the 2020 NASA Planetary Science Summer School in collaboration with NASA Jet Propulsion Laboratory. The Venus Air and Land Expedition: a Novel Trailblazer for in situ Exploration (VALENTInE) is a long-duration New Frontiers–class mission to Venus in alignment with the goals recommended by the 2013 Planetary Science Decadal Survey. VALENTInE would have five science objectives: (1) determine the driving force of atmospheric superrotation, (2) determine the source of D/H and noble gas inventory, (3) determine the properties that govern how light is reflected within the lower cloud later, (4) determine whether the tesserae are felsic, and (5) determine whether there is evidence of a recent dynamo preserved in the rock record. The proposed mission concept has a total duration of 15 Earth days and would float at an altitude of 55 km, along with five dips to a lower altitude of 45 km to study Venus’s lower atmosphere. The instrument payload allows for measurements of the atmosphere, surface, and interior of Venus and includes six instruments: an atmospheric weather suite, a mass spectrometer, a multispectral imager, a near-infrared spectrometer, light detection and ranging, and a magnetometer. Principle challenges included a limitation caused by battery lifetime and low technology readiness levels for aerobots that can survive the harsh conditions of Venus’s atmosphere. This preliminary mission was designed to fit within an assumed New Frontiers 5 (based on inflated New Frontiers 4) cost cap.
Analyzing the influence of COVID-19 epidemic on the employment intention of resident physicians in China
Authors: Long Xuan , Zhang Jie , Chen Jia , Shi Lishuai , Li Xuan , Yi Wanwan , Chen Zichen , Kosasih Sinthu , Yu Zhen , Mei Aihong , Wang Changhui 
Published: July 2022

Introduction: To investigate the effects and influencing factors of the COVID-19 epidemic on the employment intention of resident physicians in China.
Methodology: 409 questionnaires were statistically analyzed after removing the missing values. We used the Chi-Square test for single-factor analysis and logistic regression analysis for multivariate analysis. The questions include the residents' employment intention and their willingness to engage in epidemic-related subspecialties and participate in epidemic-related work.
Results: Residents of severe and high-risk epidemic regions had much lower employment intentions than those of stable epidemic regions (OR = 1.917, 95% CI: 1.024, 3.591, p = 0.042). The higher the Center for Epidemiologic Studies Depression Scale (CES-D) score, the more susceptible was the resident's employement intention (OR = 1.085, 95% CI: 1.044, 1.128, p < 0.001). Residents from severe and high-risk epidemic regions were more willing to participate in clinical work (OR = 4.263, 95% CI: 1.892, 9.604, p < 0.001), and the higher the CES-D score, the lower was the proportion of residents willing to choose clinical work (OR = 0.941, 95% CI: 0.893, 0.992, p = 0.023). Residents from severe epidemics and high-risk provinces were less willing to participate in respiratory medicine (χ2 = 5.070, p = 0.027) and critical care medicine (χ2 = 7.046, p = 0.011). Compared to residents with bachelor’s degrees, residents with master’s and doctoral degrees were less willing to participate in isolation wards (OR = 1.831, 95% CI: 1.122, 2.990, p = 0.016). Residents in epidemic-related current rotation departments were less willing to go to Wuhan as volunteers (OR = 2.197, 95% CI: 1.110, 4.347, p = 0.024).
Conclusions: The COVID-19 outbreak had a negative impact on the job intentions of Chinese residents in general.
Efficacy of 5% permethrin-2% fusidic acid cream compared to 5% permethrin-placebo in the treatment of impetiginized scabies
Authors: Marina Aninda , Menaldi Sri Linuwih , Novianto Endi , Widaty Sandra 
Published: July 2022

Introduction: Scabies is caused by Sarcoptes scabiei var hominis, often causing secondary bacterial infections, especially by Streptococcus pyogenes and Staphylococcus aureus. Permethrin 5% cream is the first-line of treatment that is recommended, combined with Fusidic acid 2% cream as the first-line topical antibiotic. We investigated the efficacy of a combination of permethrin 5% cream and fusidic acid 2% cream for the treatment of impetiginized scabies.
Methodology: A double-blind, randomized clinical trial was organized at two Islamic boarding schools in Bogor, West Java, Indonesia. Forty subjects were randomly allocated into the intervention group (permethrin 5% and fusidic acid 2%; n = 20), and the control group (permethrin 5% and placebo; n = 20). Treatment efficacy was determined through the visual analogue scale (VAS) for pruritus and pain, and by examining bacterial cultures.
Results: Treatment efficacy in the intervention group was higher than in the control group on day 7 (80% vs. 35%) and day 14 (95% vs 35%, p ≤ 0.001, RR 2.714) with decreasing VAS for pruritus (p = 0.04) and pain (p = 0.035). The most common bacterium was Staphylococcus aureus. Some minor adverse effects such as itch and heat occurred temporarily.
Conclusions: Treating impetiginized scabies with permethrin 5% and fusidic acid 2% cream is more effective than treating with only 5% premethrin. The most common bacterium causing secondary infection in impetiginized scabies is Staphylococcus aureus.
Vaccine hesitancy and refusal among parents: An international ID-IRI survey
Authors: Cag Yakup , Al Madadha Mohammad Emad , Ankarali Handan , Cag Yasemin , Demir Onder Kubra , Seremet-Keskin Aysegul , Kizilates Filiz , Čivljak Rok , Shehata Ghaydaa , Alay Handan , Alkan-Ceviker Sevil , Yilmaz-Karadag Fatma , Cagla-Sonmezer Meliha , Ezzelarab Ramadan Manar , Magdelena Dumitru Irina , Radic Ljiljana Betica , Arapovic Jurica , Kesmez-Can Fatma , El-Sayed Nagwa Mostafa , Campbell Oladapo Babatunde , Eser-Karlidag Gulden , Khedr Reham , Isik Mehmet Emirhan , Petrov Michael Mihailov , Cernat Roxana , Erturk Umran , Uygun-Kizmaz Yesim , Huljev Eva , Amer Fatma , Ceylan Mehmet Resat , Marino Andrea , Kul Gulnur , Damar-Cakirca Tuba , Khalaf Yara Mohsen , Isik Arzu Cennet , Ariyo Olumuyiwa Elijah , Hakyemez Ismail Necati , Ripon Rezaul Karim , Afkhamzadeh Abdorrahim , Dindar-Demiray Emine Kubra , Gideon Osasona Oluwadamilola , Belitova Maya , Altindis Mustafa , El-Sokkary Rehab , Tekin Recep , Garout Mohammed Ahmed , Zajkowska Joanna , Fazal Farhan , Bekcibasi Muhammed , Hukic Mirsada , Nizamuddin Summiya , Surme Serkan , Fernandez Ricardo , El-Kholy Amani , Akhtar Nasim , Ijaz Saadia , Cortegiani Andrea , Meric-Koc Meliha , Hasman Hakan , Maduka Agah Victor , ElKholy Jehan Ali , Sari Sema , Khan Mumtaz Ali , Akin Yasemin , Kose Sukran , Erdem Hakan 
Published: July 2022

Introduction: Although vaccines are the safest and most effective means to prevent and control infectious diseases, the increasing rate of vaccine hesitancy and refusal (VHR) has become a worldwide concern. We aimed to find opinions of parents on vaccinating their children and contribute to available literature in order to support the fight against vaccine refusal by investigating the reasons for VHR on a global scale.
Methodology: In this international cross-sectional multicenter study conducted by the Infectious Diseases International Research Initiative (ID-IRI), a questionnaire consisting of 20 questions was used to determine parents’ attitudes towards vaccination of their children.
Results: Four thousand and twenty-nine (4,029) parents were included in the study and 2,863 (78.1%) were females. The overall VHR rate of the parents was found to be 13.7%. Nineteen-point three percent (19.3%) of the parents did not fully comply with the vaccination programs. The VHR rate was higher in high-income (HI) countries. Our study has shown that parents with disabled children and immunocompromised children, with low education levels, and those who use social media networks as sources of information for childhood immunizations had higher VHR rates (p < 0.05 for all).
Conclusions: Seemingly all factors leading to VHR are related to training of the community and the sources of training. Thus, it is necessary to develop strategies at a global level and provide reliable knowledge to combat VHR.