bluuebunny/crossref_metadata_2025_split huggingface dataset:
Color–Magnitude Diagram of NGC 205 and Its RR Lyrae Variables
Authors: Sarajedini Ata 
Published: February 2025

Abstract
We present the deepest color–magnitude diagram (CMD) for NGC 205 in the F606W (≈V) and F814W (≈I) filters. Our archival Hubble Space Telescope/Advanced Camera for Surveys field is centered ∼3

.

′

8 northwest of the galaxy's center. The CMD shows the canonical features of a predominantly intermediate-to-old age stellar population. Among other features, the CMD reveals a prominent red clump as well as a blue horizontal branch. Notably absent is any significant signature of a young main sequence typically produced by a stellar population with an age less than a few Gyr. From the magnitude of the red-giant-branch tip, we derive a distance modulus of (m − M)o = 24.66 ± 0.05. When compared with α-enhanced theoretical isochrones, the color distribution of the red giant branch stars yields a peak metallicity value of [Fe/H] = −0.51 ± 0.10. Our photometry also reveals a sample of 479 RR Lyrae variable stars (443 ab-type and 36 c-type). Utilizing equations that relate the periods and amplitudes to the metallicities of these stars, we find a mean 〈[Fe/H]〉 = −1.45 ± 0.02 on the Zinn & West scale for the purely old stellar population in NGC 205. The quoted uncertainty represents the standard error of the mean abundance value is consistent with that of the six genuine old globular clusters in NGC 205.
Geometric Correction for Wind Accretion in Binary Systems
Authors: Tejeda Emilio , Toalá Jesús A. 
Published: February 2025

Abstract
The Bondi–Hoyle–Lyttleton (BHL) accretion model is widely used to describe how a compact object accretes material from a companion's stellar wind in binary systems. However, its standard implementation becomes inaccurate when the wind velocity (v
w) is comparable to or less than the orbital velocity (v
o), predicting nonphysical accretion efficiencies above unity. This limits its applicability to systems with low wind-to-orbital velocity ratios (w = v
w/v
o ≤ 1), such as symbiotic systems. We revisit the implementation of the BHL model and introduce a geometric correction factor that accounts for the varying orientation of the accretion cylinder relative to the wind direction. This correction ensures physically plausible accretion efficiencies (η ≤ 1) for all w in circular orbits. Our new implementation naturally predicts the flattening of the accretion efficiency observed in numerical simulations for w < 1, without the need for ad hoc adjustments. We also peer into the implications of our prescription for the less-explored case of eccentric orbits, highlighting the key role of the geometric correction factor in shaping the accretion process. We compare our predictions with numerical simulations, finding good agreement for a wide range of parameters. Applications to the symbiotic star R Aqr and the X-ray binary LS 5039 are presented. This improved implementation offers a more accurate description of wind accretion in binary systems, with implications for stellar evolution, population synthesis, and observational data interpretation.
Constraining the Nuclear Equation of State of a Neutron Star via High-frequency Quasi-periodic Oscillation in Short Gamma-Ray Bursts
Authors: Huang Jun-Xiang , Lü Hou-Jun , Liang En-Wei 
Published: February 2025

Abstract
The determination of the equation of state (EOS) of a neutron star (NS) and its maximum mass is very important for understanding the formation and properties of NSs under extreme conditions, but they remain open questions. Short-duration gamma-ray bursts (GRBs) are believed to originate from the merger of binary NSs or giant flares (GFs) of soft gamma repeaters (SGRs). Recently, the high-frequency quasi-periodic oscillations (QPOs) have been claimed to be identified from two short GRBs (GRB 931101B and GRB 910711). In this paper, we propose that the observed high-frequency QPOs in these two short GRBs result from torsional oscillations in the GFs of SGRs associated with cold NSs, or from radial oscillations of hypermassive NSs as the hot remnants of binary NS mergers, and then to constrain the EOS of NSs. For torsional oscillations, the six selected EOSs (TM1, NL3, APR, SLy4, DDME2, and GM1) of NSs suitable for the zero-temperature condition exhibit significant overlap in mass ranges, suggesting that we cannot constrain the EOS of NSs. For radial oscillations, the six selected EOSs (IUF, TM1, TMA, FSG, BHBLp, and NL3) of NSs suitable for the high-temperature condition cannot be ruled out when redshift is considered. However, it is found that the EOS can only be constrained if the redshift and temperature of the remnant can be measured.
An Asian monogenic diabetes registry: prevalence, long-term renal trajectory and development of a diagnostic algorithm for selection of candidates for genetic testing
Authors: Tan Clara Si Hua , Kee Kai Xiang , Zheng Huili , Chan Lovynn Wan Ting , Song Yuzhen , Kon Winston Yin Chian , Chee Ying Jie , Lian Joyce Xia , Vasanwala Rashida Farhad , Yap Fabian Kok Peng , Loh Wann Jia , Subramaniam Tavintharan , Sum Chee Fang , Lim Su Chi 
Published: February 2025

Abstract

Introduction:
Through the National Healthcare Group–Khoo Teck Puat Hospital Monogenic Diabetes Registry, we aimed to determine the prevalence and spectrum of maturity-onset diabetes of the young (MODY), describe the long-term renal trajectory of major MODY subtypes, and develop a diagnostic algorithm based on a combination of clinical parameters and biomarkers to refine selection of candidates for genetic testing.

Methods:
A total of 373 study participants attending secondary care diabetes centres in Singapore were referred for genetic testing. Key inclusion criteria for genetic testing included onset age ≤35 years, body mass index <32.5 kg/m2 and absence of glutamic acid decarboxylase autoantibody.

Results:
Analysis of 16 genes and one mitochondrial variant led to a molecular diagnosis in 49 participants, with pathogenic variants present mostly in HNF1A (29%), HNF4A (23%) and GCK (15%). Long-term renal trajectory data observed between these major MODY subtypes were not significantly different, but some key observations were typical for each subgroup. For instance, patients with HNF4A-MODY were predisposed to the risk of microvascular complications (i.e., diabetic kidney disease), while patients with GCK-MODY had mild and non-progressive hyperglycaemia. A structured diagnostic algorithm, including readily available biomarkers such as high-sensitive C-reactive protein (hs-CRP) and high-density lipoprotein-cholesterol (HDL-c), provided 71% diagnostic accuracy, achieving a negative predictive value of 0.94 and a sensitivity of 0.68.

Conclusion:
The prevalence of MODY (13%) is non-trivial among young-onset diabetes referred for genetic testing based on clinical classifiers suggestive of MODY. Current clinical assessment tools may include hs-CRP and HDL-c to refine selection of candidates for genetic testing.
Topo-isomorphisms of irregular Toeplitz subshifts for residually finite groups
Authors: Gómez Jaime 
Published: February 2025

For every countable residually finite group

G

and every totally disconnected metric compactification

\overleftarrow{G}

of

G

, we construct an irregular Toeplitz subshift

X\subseteq \{0,1\}^{G}

whose maximal equicontinuous factor is

\overleftarrow{G}

and such that

X

is a topo-isomorphic extension of

\overleftarrow{G}

. When the acting group

G

is amenable, our construction yields new examples of mean-equicontinuous dynamical systems.
Evaluation comparative des performances de croissance de trois écotypes de poulets locaux du Togo en conditions améliorées d’élevage
Authors: Kossoga Kakom Assota , Batimsoga Badjonama Bougra , Bilalissi Abidi , Lombo Y. , Tete-Benissan Amivi Kafui 
Published: February 2025

La caractérisation phénotypique a permis d'identifier trois écotypes distincts de poulets locaux du Togo sur la base de leur poids adulte et de leurs mensurations corporelles. Cependant, les informations disponibles sur leurs performances sont limitées. L’objectif de l’étude était d’évaluer et comparer, en conditions améliorées d’élevage, les performances de croissance et la mortalité de poulets locaux de trois écotypes du Togo. Au total, 124 ; 89 et 99 poussins respectivement d’écotype Atakora, Forêt et Savane ont été identifiés à l’éclosion et élevés dans les mêmes conditions pendant 20 semaines durant lesquelles les paramètres de croissance et la mortalité ont été enregistrés. Les résultats ont montré des différences non significatives (P > 0,05) entre les écotypes en termes de gain moyen quotidien (8,91 ; 8,40 et 9,12 g/j), d’indice de consommation (5,48 ; 5,04 et 4,88 pour les mâles et 8,36 ; 8,24 et 7,16 pour les femelles) et de mortalité (16,13 ; 10,11 et 7,07%). Des différences significatives (p < 0,05) de performances ont été observées entre les écotypes Atakora et Forêt pour l’ingestion alimentaire (57,65 contre 52,73 g/j) et entre les écotypes Forêt et Savane pour le poids vif à 20 semaines d’âge (1191,49 contre 1281,07 g). Il est conclu que les poulets locaux d’écotypes Atakora, Forêt et Savane ont des performances de croissance comparables avec des courbes aux allures similaires. Les paramètres de ces courbes de croissance méritent d’être évalués.
État de fertilité des sols dans le Centre-Est de la Côte d’Ivoire : cas de la cacaoculture dans les localités de Dimbokro, M’Bahiakro et Daoukro
Authors: Yao Rodrigue Kouadio , Boa Yannick Brou Brindou , Ama-Abina Joséphine Tamia , Kouassi Alphonse N’guessan , N’cho Clément Odon 
Published: February 2025

La zone Centre-Est de la Côte d’Ivoire fait face à la variabilité climatique et à la dégradation des sols depuis des décennies. Aussi, assiste- on à une migration des agriculteurs des sommets et hauts de versants vers les mi-versants et bas de versants. Malgré ce mouvement topographique, les rendements escomptés en cacaoculture ne sont pas atteints. L’objectif de cette étude a été d’évaluer l’état de fertilité des sols sous forêts (Sf), jachères (Sj) et plantations (Sp), à AHUA, à KOYA et à ASKO. Des échantillons de sol ont été prélevés sur ces trois sites et analysés au laboratoire. Les résultats ont montré pour les Sf, une densité apparente et une teneur en éléments grossiers élevées. Les sols étaient de texture limono-argilo-sableuse. L’humidité au pF4,2 a été différente significativement selon le type d’occupation. La réserve utile était élevée dans les Sj et Sp. Au niveau chimique, le pH a été faible (5,25 ˂ 6,05) ; la teneur en matière organique en moyenne (1,81% ˂ 2,88%) a été faible dans les Sf, Sj et Sp. Pour toutes les situations, l’état de fertilité était bas à moyen avec une faible teneur en azote (0,13% ˃ 0,03%), phosphore assimilable (2,12 mg/kg ˂ 11,5 mg/kg), magnésium (1,02 cmol/kg ˂ 2,45 cmol/kg) et CEC (8,07 cmol/kg ˂ 21 cmol/kg). Les rapports Mg2+/K+ et (Ca2+ (+) Mg2+ ) / K+ respectivement supérieurs à 3,5 et 25 indiquaient une déficience en K+ . Il ressort que les Sj et les Sp pourraient être favorables au cacaoyer. Cependant, les carences en éléments nutritifs nécessitent des corrections.
Contribution de trois plantes répulsives dans la lutte biologique contre les insectes ravageurs de la tomate à la Vallée du Kou au Burkina Faso
Authors: Sawadogo Alizèta , Kientega Pierre , Zida Issaka , Ouedraogo Serge R. 
Published: February 2025

L’utilisation non raisonnée des insecticides de synthèse dans le contrôle des insectes ravageurs par les maraîchers constituent un danger pour le consommateur et l’environnement. Pour atténuer ce problème, des recherches de méthodes alternatives telles que les pratiques culturales s’avèrent nécessaires. L’étude a été réalisée dans la Vallée du Kou, de novembre 2022 à mars 2023. Elle visait à évaluer l’efficacité de plantes ayant des propriétés répulsives sur la densité des insectes ravageurs, les dégâts et le rendement de la tomate. Pour ce faire, un dispositif expérimental en blocs aléatoires complets constitué de cinq traitements en quatre répétitions a été mis en place. Les analyses des données ont montré que les traitements ont eu un effet significatif (P=0,02) sur les dégâts occasionnés par Helicoverpa armigera Hübner. La densité des prédateurs était plus importante dans l’association tomate + œillet d’Inde. Les rendements moyens de tomate étaient plus élevés dans les parcelles traitées avec le pyrical 480 EC (8,71 t/ha), suivi des parcelles tomate + œillet d’Inde (8,29 t/ha). L’intégration de l’œillet d’Inde dans un système push-pull pourra contribuer à améliorer l’efficacité du dispositif de lutte biologique contre les insectes ravageurs de la tomate au Burkina Faso.
Novel catechin ester from the leaf extract of <i>Chromolaena Odorata</i> harvested from south eastern Nigeria
Authors: Iwu Irenus Chinonye , Ukaoma Augusta Adanma , Emeziem Donald Mgbodum , Chiegboka Nneamaka Alice , Oze Rita Nwanneamake , Obiagwu Ifeoma , Igbomezie Maryann Chioma , Uyanwa Maryjane 
Published: February 2025

Nigeria is blessed with abundant number of medicinal plant and most of these plants though used locally, has not been fully characterized. There is a need to identify the active compounds responsible for the pharmacological activities of these plants extracts. One such plant is Chromoleana odorata, a plant that grows much in the wild of which every of its parts serves as medicine. Our work is aimed at isolating and characterizing bioactive compounds from the leaf extract of this plant. The dried leaf sample was extracted with ethanol, concentrated and re-extracted with chloroform. The extract was partitioned and subjected to column chromatography. The pure compound was obtained from diethyl ether/ chloroform ( 90;10) ml eluate and was subjected to thin layer chromatography which showed one spot (Rf 0.36), a yellow oily liquid with a mass of 0.58g. Infra-red absorption (cm-1 ) showed peaks at 801.378, which is out of plane aromatic C-H bending, 1095.837, stretching vibration of alcohols and phenols C─O. 1159.202, 1461.116 vibrations for aromatic C=C , 1654.938 aromatic stretching C=C vibrations , 1744.394 for ester C= O and 2855.141, 2922.233, 3365.786 for alcohol OH vibrations . Proton nuclear magnetic resonance spectroscopy ( 1HNMR) and carbon 13 nuclear magnetic spectroscopy (13CNMR) spectra of compound were used to elucidate the structure, mass spectrometric analysis gave the mass to charge ratio (m/z) as 346 corresponding to molecular formula C18H18O7. The compound was identified as Catechin -7- methoxy methyl ester.
African regional integration: An analysis of the possibility of advancing towards a supranational structure. a study using SVAR
Authors: EL Hajoui Yassine  , Radouane RAOUF  , Adil Ez-Zetouni  
Published: February 2025

The objective of this article is to identify the degree of (a)symmetry of macroeconomic shocks affecting African countries in order to test the possibility of progressing towards a supranational structure. To achieve this goal, we employ a structural VAR process to decompose the macroeconomic shocks and then determine their degree of correlation. The results show that the economies of the continent are marked by relatively high degrees of asymmetry, as the responses to the same type of shock differ. Indeed, 79.02% of the correlations of real supply shocks between African countries are asymmetric, as well as 86.76% of the correlations of demand shocks, and 88.13% of the correlations of monetary shocks. Thus, a deepening of integration towards the harmonization of policies would lead to an increase in real divergence between countries, resulting in a reinforcement of the asymmetry of shocks on the African continent.
Keywords: Macroeconomic Shocks, Supranational Structure, SVAR Model, Degrees of Asymmetry.
MENELUSURI KEARIFAN LOKAL: RAGAM LEGENDA MASYARAKAT BIMA SEBAGAI ALTERNATIF PEMBELAJARAN SASTRA TINGKAT DASAR
Authors: Ifan Muhammad 
Published: February 2025

AbstractLegends are a form of oral literature rich in cultural and moral values, with significant potential for teaching and preserving local cultural heritage. This study aims to explore and analyze the cultural values embedded in the legends of the Bima community in West Nusa Tenggara, focusing on their use as teaching materials in elementary-level literature education. As a form of oral literature, legends hold considerable potential in teaching moral, cultural, and social values. This research employs a literary anthropology approach and digital ethnography methods to document various types of folktales and analyze the values they contain. Data was collected through online interviews with key informants who shared these tales. The findings reveal that the four primary legends studied La Hila Putri Ma Mbora, Wadu Ntanda Rahi, the Legend of Mount Tambora, and Daeng La Minga contain important multicultural values, such as respect for nature, family values, emotional resilience, religious beliefs, tolerance, as well as morality and ethics. This research is expected to contribute to the development of relevant and meaningful literary teaching materials, while introducing the rich local culture of Bima to younger generations through elementary literature education.Keywords: Folktales, Oral Literature, Cultural Values, Literature Education, Bima community MENELUSURI KEARIFAN LOKAL: RAGAM LEGENDA MASYARAKAT BIMA SEBAGAI ALTERNATIF PEMBELAJARAN SASTRA TINGKAT DASARAbstrakLegenda merupakan salah satu bentuk sastra lisan yang kaya akan nilai-nilai budaya dan moral, yang memiliki potensi besar dalam pengajaran dan pelestarian warisan budaya lokal. Penelitian ini bertujuan untuk menggali dan menganalisis nilai-nilai kultural yang terkandung dalam legenda masyarakat Bima, Nusa Tenggara Barat, dengan fokus pada pemanfaatannya sebagai bahan ajar dalam pengajaran sastra di tingkat dasar. Legenda, sebagai salah satu bentuk sastra lisan, memiliki potensi besar untuk mengajarkan nilai-nilai moral, budaya, dan sosial. Penelitian ini menggunakan pendekatan antropologi sastra dan metode etnografi digital untuk mendokumentasikan berbagai jenis dongeng dan menganalisis nilai-nilai yang terkandung di dalamnya. Data diperoleh melalui wawancara daring dengan informan kunci yang menyampaikan dongeng-dongeng tersebut. Hasil penelitian mengungkapkan bahwa empat dongeng utama yang diteliti, yaitu La Hila Putri Ma Mbora, Wadu Ntanda Rahi, Legenda Gunung Tambora, dan Daeng La Minga, mengandung nilai-nilai multikultural yang penting, seperti penghormatan terhadap alam, nilai kekeluargaan, ketahanan emosional, keagamaan, toleransi, serta moralitas dan etika. Penelitian ini diharapkan dapat memberikan kontribusi dalam pengembangan bahan ajar sastra yang relevan dan bermakna, serta memperkenalkan kekayaan budaya lokal Bima kepada generasi muda melalui pendidikan sastra di tingkat dasar.Kata kunci: Legenda, sastra lisan, nilai kultural, pengajaran sastra, masyarakat Bima
Pollen-based climatic reconstructions for the interglacial analogues of MIS 1 (MIS 19, 11, and 5) in the southwestern Mediterranean: insights from ODP Site 976
Authors: Sassoon Dael , Combourieu-Nebout Nathalie , Peyron Odile , Bertini Adele , Toti Francesco , Lebreton Vincent , Moncel Marie-Hélène 
Published: February 2025

Abstract. Pleistocene interglacials, specifically Marine Isotope Stages (MISs) 19, 11, and 5, have been suggested as analogues of MIS 1 due to similar solar forcing patterns, greenhouse gas concentrations, and sea levels. There has been substantial debate regarding which of these is the most suitable analogue and so far there has been no consensus, although what really emerges from recent work is the high variation in regional climate during these periods. One of the limiting factors in our understanding of these potential analogues is the fact that very few long sequences cover the entire duration of these interglacials at high resolution. In this study, a multi-method approach is used to produce climatic reconstructions for MIS 19, 11, 5, and 1 using pollen data derived from a single long marine core from Ocean Drilling Program (ODP) Site 976. This represents the first study which attempts to use pollen-based climatic reconstructions to compare MIS 1 with its analogues, representing a necessary contribution to the debate with a focus on the relationships between vegetation and climate in the southwestern Mediterranean. Three methods of quantitative climate reconstruction have been adopted: two more widely used methods, the modern analogue technique (MAT) and weighted-average partial least-squares (WAPLS) regression, and a more recent machine learning method known as boosted regression trees (BRTs). The reconstructions show consistent changes in temperature and precipitation during MIS 19, 11, 5, and 1, which correlate well with climatic changes observed in other regional and global proxies and highlight distinct climatic characteristics of each interglacial period in the southwestern Mediterranean. MIS 19 exhibits high variability and colder temperatures compared to subsequent interglacials and MIS 1. Conversely, MIS 11 displays warmer temperatures and greater stability, which makes it a useful analogue to understand prolonged interglacials, crucial when considering the anthropogenic impacts on the duration of warm climate during the Holocene. MIS 5 exhibits overall warmer conditions, and its higher temperature, coupled with fluctuations in solar forcing, makes it a less suitable MIS 1 analogue. Although past interglacials do not offer direct predictions for the Holocene's future, they provide essential insights into Earth's responses to various forcing factors, serving as crucial benchmarks for understanding the Mediterranean's sensitivity to global changes.