bluuebunny/crossref_metadata_2025_split huggingface dataset:
A study of centaur (54598) Bienor from multiple stellar occultations and rotational light curves
Authors: Rizos J. L. , Fernández-Valenzuela E. , Ortiz J. L. , Rommel F. L. , Sicardy B. , Morales N. , Santos-Sanz P. , Leiva R. , Vara-Lubiano M. , Morales R. , Kretlow M. , Alvarez-Candal A. , Holler B. J. , Duffard R. , Gómez-Limón J. M. , Desmars J. , Souami D. , Assafin M. , Benedetti-Rossi G. , Braga-Ribas F. , Camargo J. I. B. , Colas F. , Lecacheux J. , Gomes-Júnior A. R. , Vieira-Martins R. , Pereira C. L. , Morgado B. , Kilic Y. , Redfield S. , Soloff C. , McGregor K. , Green K. , Midavaine T. , Schreurs O. , Lecossois M. , Boninsegna R. , Ida M. , Le Cam P. , Isobe K. , Watanabe Hayato , Yuasa S. , Watanabe H. , Kidd S. 
Published: July 2024

Context. Centaurs, distinguished by their volatile-rich compositions, play a pivotal role in understanding the formation and evolution of the early Solar System, as they represent remnants of the primordial material that populated the outer regions. Stellar occultations offer a means to investigate their physical properties, including shape and rotational state, and the potential presence of satellites and rings.
Aims. This work aims to conduct a detailed study of the centaur (54598) Bienor through stellar occultations and rotational light curves from photometric data collected during recent years.
Methods. We successfully predicted three stellar occultations by Bienor that were observed from Japan, Western Europe, and the USA. In addition, we organized observational campaigns from Spain to obtain rotational light curves. At the same time, we developed software to generate synthetic light curves from three-dimensional shape models, enabling us to validate the outcomes through computer simulations.
Results. We resolved Bienor’s projected ellipse for December 26, 2022; determined a prograde sense of rotation; and confirmed an asymmetric rotational light curve. We also retrieved the axes of its triaxial ellipsoid shape as a = (127 ± 5) km, b = (55 ± 4) km, and c = (45 ± 4) km. Moreover, we refined the rotation period to 9.1736 ± 0.0002 h and determined a geometric albedo of (6.5 ± 0.5)%, which is higher than previously determined by other methods. Finally, by comparing our findings with previous results and simulated rotational light curves, we analyzed whether an irregular or contact-binary shape, an additional element such as a satellite, or significant albedo variations on Bienor’s surface may be present.
Exploring fluorine chemical evolution in the Galactic disk: The open cluster perspective
Authors: Bijavara Seshashayana S. , Jönsson H. , D’Orazi V. , Sanna N. , Andreuzzi G. , Nandakumar G. , Bragaglia A. , Romano D. , Spitoni E. 
Published: July 2024

Context. Open clusters are ideal tools for tracing the abundances of different elements because their stars are expected to have the same age, distance, and metallicity. Therefore, they serve as powerful tracers for investigating the cosmic origins of elements. This paper expands on a recent study by us, in which the element fluorine was studied in seven open clusters; here we add six open clusters and eight field stars.
Aims. The primary objective is to determine the abundance of fluorine (F) to gain insight into its production and evolution. The magnesium (Mg) abundances were derived to categorize the field stars into high and low alpha disk populations. Additionally, cerium (Ce) abundances were determined to better understand the interplay between F and s-process elements. Our goal is to analyze the trend of F abundances across the Galactic disk based on metallicity and age. By comparing observational data with Galactic chemical evolution models, the origin of F can be better understood.
Methods. The spectra were obtained from the high-resolution near-infrared GIANO-B instrument at the Telescopio Nazionale Galileo (TNG). For the derivation of the stellar parameters and abundances, the Python version of Spectroscopy Made Easy (PySME) was used. OH, CN, and CO molecular lines and band heads along with Fe I lines were used to determine the stellar parameters in the H-band region. Two HF lines in the K band (λλ 2.28, and 2.33 μm), three K-band Mg I lines (λλ 2.10, 2.11, and 2.15 μm), and two Ce II lines in the H band (λλ 1.66, and 1.71 μm) were used to derive the abundances of F, Mg, and Ce, respectively.
Results. F, Mg, and Ce abundances were derived for 14 stars from 6 OCs, as well as for 8 field stars. The F and Ce abundances were investigated as a function of metallicity, age, and galactocentric distance. We also compared our findings with different Galactic chemical evolution models.
Conclusions. Our results indicate that asymptotic giant branch stars and massive stars, including a subset of fast rotators (whose rotation speed likely increases as metallicity decreases), are necessary to explain the cosmic origin of F. This finding is consistent with and, with the large sample size, reinforces the conclusion of our previous study.
Diversité des exploitations agricoles d’oasis de montagne : une analyse par le travail, les revenus et le couplage entre cultures et élevage
Authors: Sraïri Mohamed Taher , Amartini Hakim 
Published: July 2024

Les oasis de montagne d’Afrique du Nord subissent de plein fouet les effets du changement climatique, qui amplifient l’ensemble des contraintes agronomiques : foncier exigu, aridité structurelle, etc. Dans cette étude, l’objectif est d’analyser les différentes dimensions du couplage entre cultures et élevage et leurs effets sur le fonctionnement des systèmes de production. Trente exploitations des communes de M’semrir et Tilmi (1900 m d’altitude, Haut Atlas central, Maroc) ont été retenues. Les durées de travail agricole et les revenus annuels générés par les différentes spéculations ont été déterminés. Une typologie d’exploitations agricoles a été établie sur la base des données de fonctionnement collectées. Elle a révélé les cinq types suivants, illustrant les différences de localisation géographique : i) élevage transhumant et cultures diversifiées ; ii) élevages sédentaires avec un important volume de travail familial ; iii) couplage cultures de rente et élevage sédentaire ; iv) élevage sédentaire basé sur les cultures fourragères ; et v) exploitations de vergers et d’élevage avec un épandage massif de fumier. Les résultats ont montré que le travail alloué à l’élevage représente plus de la moitié (57 %) du temps de travail total, illustrant son importance, puisqu’il est aussi associé à près de la moitié (49 %) des revenus agricoles. Ce travail dédié à l’élevage est assumé presque exclusivement (93 %) par de la main-d’œuvre familiale. Cette dernière participe aussi aux travaux liés aux cultures (66 %). Le pommier en occupe l’essentiel (57 %), suivi des céréales (29 %) et du maraîchage (14 %). Un jour de travail est rémunéré en moyenne à 7,5 € pour l’élevage ; 23,6 € pour le pommier ; 6,1 € pour les céréales et 3,7 € pour le maraîchage.
Quelques réflexions autour des liens entre océan, arts et sciences. À propos d’un colloque au Muséum national d’histoire naturelle
Authors: Artaud Hélène 
Published: July 2024

Le 12 janvier 2023, à l’amphithéâtre de la grande galerie de l’Évolution (MNHN), un colloque a réuni une quinzaine de chercheurs, scientifiques et artistes autour d’une thématique qui mobilise de plus en plus l’attention du public et s’inscrit dans le champ particulièrement vivace ces dernières décennies des relations entre arts et écologie. Portant sur le rôle imparti aux arts dans les enjeux océaniques contemporains, cette journée entendait répondre à deux questions principales : la première consistait à questionner la pertinence de maintenir des séparations disciplinaires héritées des Modernes dans un monde soumis à l’effondrement et se demandait si la place de plus en plus importante conférée à l’art dans les débats écologiques n’était pas l’indice que les limites de ce grand partage avaient été atteintes. La seconde question portait sur l’originalité de l’objet océanique pour penser et se saisir de ces mondes abîmés.
One-Pot, Two-Step Synthesis of Highly Functionalized 4-Indolyl/Pyrrolyl-Chromanes via a para-Quinone Methide Formation–1,8-Addition Sequence
Authors: Sridharan Vellaisamy , Khatoon Rafia , Jandial Tanvi , Gupta Anish , Kundan Sujata 
Published: July 2024

AbstractAn efficient one-pot, two-step synthesis of structurally diverse 4-indolyl-/pyrrolyl-chromanes was developed starting from o-propargylated salicylaldehydes, 2,6-dialkylphenols and indoles/pyrrole. This process begins with a sequential secondary amine-catalyzed formation of p-quinone methides followed by Brønsted acid catalyzed 1,8-addition with indoles/pyrrole to access the functionalized chromanes in high yields (up to 91%). This sequential reaction generates three new C–C bonds, shows high step- and atom-economy with only one molecule of water as the side product and gives access to complex molecular frameworks without the need for the isolation of the intermediates.
Functional Restoration of Bilateral Wrist Level Hand Amputee with Six-Toe Transfers and Three Free Flaps: An Alternative to Hand Allotransplantation or Prosthesis
Authors: Nehete Rajendra , Nehete Anita , Ghalme Amol , Kulkarni Abhishek , Fidvi Al Iqyan 
Published: July 2024

Abstract
Introduction Hand amputation at the wrist level is severely disabling, especially when bilateral. It is paramount to restore the hand function to the best possible level for the patient's daily living activities, as well as optimal social and occupational rehabilitation. There are various options for restoration of function after amputation at wrist and distal forearm levels including Krukenberg's operation, variations of toe transfers, hand allotransplantation, and prosthesis. Krukenberg's procedure and the reconstruction using toe transfer like Vilkki's procedure or two-toe transfers, restore only the pinch. Hand allotransplantation, although it gives excellent function, has limitations due to the complications of immunosuppression. Functional hand prosthesis, though superior in cosmetic appearance, have again limitations in function, and the cost is prohibitive for most patients in our country.
Materials and Methods We present the unique case of a bilateral hand amputation at the wrist level reconstructed with three toes and free anterolateral thigh (ALT) flap in a single-stage surgery for each hand. In two stages, the patient had six toes transferred to both hands.
Result All transferred toes and all three free (two ALT and one thoracodorsal artery perforator) flaps survived completely. Three-finger grip (tripod pinch) was thus restored in each hand. The hook grip was also restored well by the reconstructed two fingers. Within 3 months after surgery, the patient could perform all activities of daily living. He resumed his original job with some modification of his work within 6 months postinjury.
Conclusion Hand reconstruction using three toes and a free flap is an excellent option for functional restoration for amputation at the wrist and distal forearm level. It allows an early return to function and good social and professional integration of the patient. This procedure is a potential alternative to expensive prosthesis and allotransplantation for a bilateral hand amputation.
Computed Tomography Scan Correlation of Position of Appendix with Present Literature
Authors: Kachare Manohar , Patil Abhijit D. , Gamanagatti Shanta A. , Kulkarni Sanjay B. 
Published: July 2024

Abstract
Background The appendix exhibits varied anatomical orientations, which significantly influence the diagnosis and treatment of appendicitis. Existing literature predominantly relies on cadaveric studies to delineate common appendix positions, lacking comprehensive computed tomography (CT)-based investigations on a large scale. Thus, our study endeavors to delineate the prevailing position of the appendix on CT scans and ascertain its concordance with existing literature, thereby augmenting our understanding of this anatomical entity. This cross-sectional study was conducted in a tertiary care hospital setting.
Materials and Methods A total of 1,068 patients aged 18 years and older, undergoing abdominal CT scans at the hospital between July 2020 and July 2021, were enrolled in the study, with exclusion criteria applied to conditions that could distort anatomical features. The position of the appendix was meticulously documented for each patient, alongside measurements including diameter, wall thickness, and origin. Data collection utilized a predefined Microsoft Excel sheet. Subsequently, numerical and relative frequencies were computed for appendiceal positions and origins. Additionally, diameter and wall thickness were assessed, and pertinent parameters were derived.
Results The relative frequencies of various potential appendiceal positions observed in our study were as follows: subcecal: 6.6%; paracecal: 1.2%; pelvic: 21.9%; postileal: 32.9%; preileal: 6.7%; retrocecal: 28.5%; subhepatic: 2.2%.
Conclusion In contrast to traditional assumptions, our findings reveal that the most prevalent positions of the appendix are postileal, retrocecal, and pelvic, challenging historical beliefs.
Exploring Sleep Patterns in 3,475 College Students: A Comparative Study of Geographical Location, Gender, and Age
Authors: Moussa-Chamari Imen , Romdhani Mohamed , Farooq Abdulaziz , Trabelsi Khaled , Yousfi Narimen , Kamoun Karim , Ahmadian Arezou , Almarri Senaid Salem , Chamari Karim , Hue Olivier 
Published: July 2024

Abstract
Objective Sleep is a fundamental physiological process essential for maintaining overall health and optimal functioning across various cognitive, emotional, and physical domains. To cross-sectionally investigate the sleep pattern among college students according to geographical location, gender, and age.
Materials and Methods A total of 3,475 valid responses, 3,366 from 4 continents (Africa – n = 1,095; America – n = 182; Asia – n = 1,562; Europe – n = 527); 2,075 from female students and 1,369 from male students (n = 3,444), were analyzed. Sleep quality, insomnia, and daytime sleepiness were assessed using validated questionnaires (Pittsburgh Sleep Quality Index [PSQI], Insomnia Severity Index [ISI], and Epworth Sleepiness Scale [ESS], respectively).
Results Students from all continents had poor sleep quality, and there were inter-countries differences in sleep quality. The frequency of poor sleep quality and subclinical-to-clinical insomnia were higher among Asian (AsiS) and African students (AfS) compared with American (AmS) and European students (EuS) (p < 0.05). Asian students had a greater frequency of excessive daytime sleepiness (EDS) compared with those from other continents (p < 0.05). Females showed higher mean ISI scores (p < 0.001) as well as a greater frequency of poor sleep quality (p < 0.05), subclinical-to-clinical insomnia (p < 0.05), and EDS (p < 0.05) compared with males. Insufficient sleep duration was more frequent in older-aged groups (i.e., 26–30, 31–35, and > 36 years) compared with the ≤ 20 years age group (p < 0.05). Excessive daytime sleepiness was more frequent in younger age groups (i.e., ≤ 20 and 21–25 years) versus the > 36 years (p < 0.05) group. There were no significant differences in the frequency of various degrees of insomnia across age groups.
Conclusion Our results suggest the need for tailored interventions for addressing sleep disturbances among college students of all age groups, with a specific focus on AsiS and AfS, as well as female students.
Clinicohematological Profile of Patients with Bicytopenia
Authors: Murshed Najib Muaamer Faed , Bhat Shubha P. 
Published: July 2024

Abstract
Background Bicytopenia (BC) is a reduction in counts in any of two cell lineages of blood, which can be a combination of anemia with thrombocytopenia, anemia with leukopenia, or leukopenia with thrombocytopenia. The etiology of BC can be a malignancy, nonmalignant disease, infectious cause, or drug-induced.
Aim To assess the clinicohematological profile in patients with BC.
Materials and Methods This prospective study was conducted in the hematology laboratory at the Justice K.S. Hegde Charitable Hospital. Patients with BC detected during the analysis of blood for any clinical condition were included in the study. Blood parameters assessed were hemoglobin, red blood cell count, total leukocyte count, and platelet count.
Results In this study, 86 patients' samples with BC were collected, out of which 55.8% were male, and 44.2% were female. The most common BC was anemia with thrombocytopenia (69.8%). The most common etiology of BC was found to be nonmalignant (37.2%), followed by malignant (37.2%), infectious (25.6%), and drug-induced (4.7%) cases. Most of the patients with BC presented with fever, pallor, and generalized weakness.
Conclusion Anemia with thrombocytopenia emerged as the predominant form of BC in the nonmalignant group, while the malignant etiology group presented with anemia with leukopenia. The infectious etiology group presented with leukopenia with thrombocytopenia. Neonatal sepsis emerged as the most prevalent cause of BC in the age group younger than 10 years, viral fever in the age group of 10 to 39 years, acute lymphoblastic leukemia in the age group of older than 70 years, and chronic liver disease in patients aged between 40 and 69 years.
Enhancing organizational sustainable innovation performance through organizational readiness for big data analytics
Authors: Arshad Muhammad , Qadir Aneela , Ahmad Waqar , Rafique Muhammad 
Published: July 2024

AbstractOrganizations must employ big data analytics to maintain sustained innovation in the highly dynamic and evolving business landscape. Even though BDA has a transformative power to revolutionize how businesses do things and engage with their customers’ adopting BDA has faced significant challenges, especially in developing countries. This research aims to create a theoretical framework to understand how organizational readiness for BDA can influence sustainable innovation performance. Sampling errors were mitigated through a time-lagged study design, and the data was collected in three phases. The test results using Partial Least Squares Structural Equation Modeling show that organizational readiness is a critical mediator, establishing a robust chain between BDA skills and sustainable innovation performance. The results of this study imply the need for organizational foundation and alignment, which are critical to the compelling strategic deployment of BDA for sustainability innovation performance. Thus, this study can offer a valuable contribution to this topic in the future and a profound implication of the phenomenon at receptive stages.
Investigation on fixed pitch Darrieus vertical axis wind turbine
Authors: Kavade Ramesh K. , Sonekar Mahesh M. , Choudhari Dilip S. , Malwe Prateek D. , Sherje Nitin P. , Ansari Mushtaq Ahmad , Shah Mohd Asif , Abdul Zahra Musaddak Maher , Kumar Abhinav 
Published: July 2024

Small-scale Darrieus wind turbines have a wide scope in areas that are isolated from the power grid for such small-scale household applications. Applications of wind turbines on house roofs are one potential way to generate electricity from wind energy harvesting in low-wind urban locations. This work studies the aerodynamic behavior of a vertical axis wind turbine based on a MATLAB programming mathematical model. The NACA0021 airfoil profile blade was used in this present research investigation. The turbine was fabricated with dimensions such as chord length, c = 95 mm, blade height, h = 600 mm, and turbine diameter, D = 600 mm. The experimental results of the turbine for air velocity from 1 to 12 ms−1 were used in this paper and compared with analytical results. It has been observed that the fixed-pitch turbine does not start by itself at a low air velocity of 1 to 5 m/s due to a minimum and negative torque.
Predissociation-based measurements of bond dissociation energies: US2, OUS, and USe
Authors: Tomchak Kimberly H. , Sorensen Jason J. , Tieu Erick , Morse Michael D. 
Published: July 2024

The uranium-containing molecules US2, OUS, and USe have been investigated using a pulsed laser ablation supersonic beam molecular source with time-of-flight mass spectrometric detection. Spectra have been recorded using the resonant two-photon ionization method over the spectroscopic range from 277 to 238 nm. These species have a myriad of excited electronic states in this spectroscopic region, leading to spectra that are highly congested and appear quasicontinuous. Sharp predissociation thresholds are observed, allowing precise bond dissociation energies to be measured. In the case of the triatomic molecules, it was necessary to use one laser for excitation and a delayed laser for ionization in order to observe a sharp predissociation threshold that allowed a precise bond dissociation energy to be measured. The resulting thermochemical values are D0(SU-S) = 4.910 ± 0.003 eV, D0(OU-S) = 5.035 ± 0.004 eV, and D0(USe) = 4.609 ± 0.009 eV. These results provide the first measurement of D0(USe) and reduce the error limits in the previous values of D0(SU-S) and D0(OU-S) by a factor of more than 70.
Enhanced energy density of BOPP film by MAH grafting for metallized capacitors
Authors: Chen Ke , Du Bo Xue , Liu Haoliang , Xiao Meng 
Published: July 2024

Abstract
In this paper, maleic anhydride (MAH) was grafted on the surfaces of biaxially oriented polypropylene (BOPP) film by ultraviolet irradiation treatment to improve the breakdown strength. The addition of MAH, with abundant deep traps, effectively hinders charge injection from the electrode, leading to improved dielectric performance, particularly at elevated temperatures. The experimental results show that the received modified film exhibits an improved permittivity of 2.37 alongside a low dielectric loss of 0.0022 at 1000 Hz. Remarkably, the DC breakdown strength reaches 633.9 kV mm−1, marking a notable 21.4% increase compared to the unmodified BOPP film at 120 °C. Moreover, the film exhibits an energy density of 2.58 J m−3, which is 1.59 times that of the pure film. The charging and discharging efficiency is also greatly improved due to the reduction of conductance losses. Through simulation results, it becomes evident that the enhanced performance is attributed to the alleviation of electric field distortion due to the suppression of injected charge. This work paves a facile route to design scalable polymeric dielectrics with outstanding performance, which facilitates the development of film capacitors.