bluuebunny/crossref_metadata_2025_split huggingface dataset:
TESS Revisits WASP-12: Updated Orbital Decay Rate and Constraints on Atmospheric Variability
Authors: Wong Ian , Shporer Avi , Vissapragada Shreyas , Greklek-McKeon Michael , Knutson Heather A. , Winn Joshua N. , Benneke Björn 
Published: March 2022

Abstract
After observing WASP-12 in the second year of the primary mission, the Transiting Exoplanet Survey Satellite (TESS) revisited the system in late 2021 during its extended mission. In this paper, we incorporate the new TESS photometry into a reanalysis of the transits, secondary eclipses, and phase curve. We also present a new K

s
-band occultation observation of WASP-12b obtained with the Palomar/Wide-field Infrared Camera instrument. The latest TESS photometry spans three consecutive months, quadrupling the total length of the TESS WASP-12 light curve and extending the overall time baseline by almost two years. Based on the full set of available transit and occultation timings, we find that the orbital period is shrinking at a rate of −29.81 ± 0.94 ms yr−1. The additional data also increase the measurement precision of the transit depth, orbital parameters, and phase-curve amplitudes. We obtain a secondary eclipse depth of 466 ± 35 ppm, a 2σ upper limit on the nightside brightness of 70 ppm, and a marginal 6.°2 ± 2.°8 eastward offset between the dayside hotspot and the substellar point. The voluminous TESS data set allows us to assess the level of atmospheric variability on timescales of days, months, and years. We do not detect any statistically significant modulations in the secondary eclipse depth or day–night brightness contrast. Likewise, our measured K

s
-band occultation depth of 2810 ± 390 ppm is consistent with most ∼2.2 μm observations in the literature.
X-Ray Emission from Star-cluster Winds in Starburst Galaxies
Authors: Franeck Annika , Wünsch Richard , Martínez-González Sergio , Orlitová Ivana , Boorman Peter , Svoboda Jiří , Szécsi Dorottya , Douna Vanesa 
Published: March 2022

Abstract
Inspired by the excess soft X-ray emission recently detected in Green Pea galaxies, we model the soft X-ray emission (0.5–2.0 keV) of hot gas from star-cluster winds. By combining individual star clusters, we estimate the soft X-ray emission expected from the typically unresolved diffuse hot gas in starburst galaxies, devoid of competing emission from, e.g., active galactic nuclei (AGNs) or other unresolved point sources. We use stellar models of subsolar metallicities (0.02 Z
⊙ and 0.4 Z
⊙) and take into account supernova explosions for massive stars. For lower metallicities, we find that stellar winds do not contribute significantly (≲3% of the mechanical energy) to the observed soft X-ray emission of normal star-forming galaxies. For higher metallicities and possibly also for larger proportions of massive star clusters in the simulated starburst galaxies, we reproduce well the observed correlation between star formation rate and X-ray luminosity previously reported in the literature. However, we find that no combination of model assumptions is capable of reproducing the substantial soft X-ray emission observed from Green Pea galaxies, indicating that other emission mechanisms (i.e., unusually large quantities of high-/low-mass X-ray binaries, ultraluminous X-ray sources, a modified initial mass function, intermediate-mass black holes, or AGNs) are more likely to be responsible for the X-ray excess.
Peculiar Disk Behaviors of the Black Hole Candidate MAXI J1348–630 in the Hard State Observed by Insight-HXMT and Swift
Authors: Zhang W. , Tao L. , Soria R. , Qu J. L. , Zhang S. N. , Weng S. S. , Zhang L. , Wang Y. N. , Huang Y. , Ma R. C. , Zhang S. , Ge M. Y. , Song L. M. , Ma X. , Bu Q. C. , Cai C. , Cao X. L. , Chang Z. , Chen L. , Chen T. X. , Chen Y. B. , Chen Y. , Chen Y. P. , Cui W. W. , Du Y. Y. , Gao G. H. , Gao H. , Gu Y. D. , Guan J. , Guo C. C. , Han D. W. , Huo J. , Jia S. M. , Jiang W. C. , Jin J. , Kong L. D. , Li B. , Li C. K. , Li G. , Li T. P. , Li W. , Li X. , Li X. B. , Li X. F. , Li Z. W. , Liang X. H. , Liao J. Y. , Liu B. S. , Liu C. Z. , Liu H. X. , Liu H. W. , Liu X. J. , Lu F. J. , Lu X. F. , Luo Q. , Luo T. , Meng B. , Nang Y. , Nie J. Y. , Ou G. , Ren X. Q. , Sai N. , Song X. Y. , Sun L. , Tan Y. , Tuo Y. L. , Wang C. , Wang L. J. , Wang P. J. , Wang W. S. , Wang Y. S. , Wen X. Y. , Wu B. Y. , Wu B. B. , Wu M. , Xiao G. C. , Xiao S. , Xiong S. L. , Chen Y. P. , Yang R. J. , Yang S. , Yang Y. J. , Yang Y. R. , Yi Q. B. , Yin Q. Q. , Yuan Y. , Zhang F. , Zhang H. M. , Zhang P. , Zhang W. C. , Zhang Y. F. , Zhang Y. H. , Zhao H. S. , Zhao X. F. , Zheng S. J. , Zheng Y. G. , Zhou D. K. 
Published: March 2022

Abstract
We present a spectral study of the black hole candidate MAXI J1348−630 during its 2019 outburst, based on monitoring observations with Insight-HXMT and Swift. Throughout the outburst, the spectra are well fitted with power-law plus disk-blackbody components. In the soft-intermediate and soft states, we observed the canonical relation

L
∝

T

in

4

between disk luminosity L and peak color temperature T
in, with a constant inner radius R
in (traditionally identified with the innermost stable circular orbit). At other stages of the outburst cycle, the behavior is more unusual, inconsistent with the canonical outburst evolution of black hole transients. In particular, during the hard rise, the apparent inner radius is smaller than in the soft state (and increasing), and the peak color temperature is higher (and decreasing). This anomalous behavior is found even when we model the spectra with self-consistent Comptonization models, which take into account the upscattering of photons from the disk component into the power-law component. To explain both anomalous trends at the same time, we suggest that the hardening factor for the inner-disk emission was larger than the canonical value of ≈1.7 at the beginning of the outburst. A more physical trend of radii and temperature evolution requires a hardening factor evolving from ≈3.5 at the beginning of the hard state to ≈1.7 in the hard-intermediate state. This could be evidence that the inner disk was in the process of condensing from the hot, optically thin medium and had not yet reached a sufficiently high optical depth for its emission spectrum to be described by the standard optically thick disk solution.
UCLCHEMCMC: An MCMC Inference Tool for Physical Parameters of Molecular Clouds
Authors: Keil Marcus , Viti Serena , Holdship Jonathan 
Published: March 2022

Abstract
We present the publicly available open-source code UCLCHEMCMC, designed to estimate physical parameters of an observed cloud of gas by combining Markov chain Monte Carlo (MCMC) sampling with chemical and radiative transfer modeling. When given the observed values of different emission lines, UCLCHEMCMC runs a Bayesian parameter inference, using an MCMC algorithm to sample the likelihood and produce an estimate of the posterior probability distribution of the parameters. UCLCHEMCMC takes a full forward-modeling approach, generating model observables from the physical parameters via chemical and radiative transfer modeling. While running UCLCHEMCMC, the created chemical models and radiative transfer code results are stored in an SQL database, preventing redundant model calculations in future inferences. This means that the more UCLCHEMCMC is used, the more efficient it becomes. Using UCLCHEM and RADEX, the increase oin efficiency is nearly two orders of magnitude, going from 5185.33 ± 1041.96 s for 10 walkers to take 1000 steps when the database is empty, to 68.89 ± 45.39 s when nearly all models requested are in the database. In order to demonstrate its usefulness, we provide an example inference of UCLCHEMCMC to estimate the physical parameters of mock data, and perform two inferences on the well-studied prestellar core, L1544, one of which shows that it is important to consider the substructures of an object when determining which emission lines to use.
Oligopoles avec entrées et types d’entrants aléatoires
Authors: Biard Romain , Deschamps Marc 
Published: March 2022

Il existe des situations au cours desquelles des personnes physiques ou morales, identiques ou pas, sont en situation d’interactions renouvelées et où, à chaque période, de nouvelles personnes, identiques ou pas, peuvent arriver. Personne ne sachant ex ante combien il y aura de personnes à chaque période. En économie industrielle cela peut correspondre aux situations d’oligopoles avec entrées et types d’entrants aléatoires. L’une des questions que peuvent alors se poser les personnes présentes au départ est de connaître le paiement final qu’elles peuvent espérer obtenir à la fin d’un certain nombre de périodes. De même, lorsqu’une personne arrive à une période donnée, elle peut vouloir connaître le paiement final qu’elle peut espérer obtenir. Afin d’apporter des éléments de réponse à ces questions nous proposons une modélisation en horizon fini et en horizon infini. Nous illustrons ensuite l’intérêt que pourrait avoir cette demière en économie industrielle en développant le cas du duopole de Cournot, puis un exemple schématique d’un marché de taxis.Classification JEL : L13, C71, K20, L51, L91, D45.
La coopétition en R&D : une étude à partir de données de co-inventions
Authors: Lebert Didier , Meunier François-Xavier 
Published: March 2022

La coopétition est la simultanéité des interactions de concurrence et de coopération entre entreprises. En matière de R&D, la coopétition est quelquefois révélée par les co-dépôts de brevets. Nous étendons les études classiques sur le sujet en introduisant le concept de coopétition réticulaire, qui comprend la coopération intra-sectorielle bilatérale ainsi que l’ensemble des autres relations de coopérations en R&D que les acteurs concernés déploient. Cela permet de caractériser la coopétition à l’échelle des industries. Nous montrons que ce qui distingue ces industries, ce ne sont pas nécessairement les intensités de recours à cette forme de relations, mais les structures qu’elles prennent. Nous utilisons la base conceptuelle et la typologie de Bouvier-Patron (2011) pour caractériser ces structures et nous proposons une méthode reposant sur la théorie des réseaux pour leur identification, représentation et analyse. Nous appliquons cette méthode aux industries pharmaceutique et automobile sur la période 2011-2016 en utilisant des données de brevets issues des bases COR&DIP et PATSTAT.Classification JEL : L10, O32.
Development of a RT-LAMP assay for detection of SARS-CoV-2
Authors: Nandi Shyam Sundar , Lambe Upendra Pradeep , Sawant Sonali Ankush , Gohil Trupti , Deshpande Jagadish 
Published: March 2022

Background & objectives
The pandemic of SARS-COV-2 began in Wuhan, China in December 2019 and has caused more than 101 million cases worldwide. Diagnostic technologies possessing sensitivity and specificity equivalent to real-time reverse-transcriptase polymerase chain reaction (rRT-PCR) assays are needed to ramp up testing capacity in most countries. Newer platforms need to be technically less demanding, require minimum equipment and reduce turn-around time for reporting results. The objective of this study was to exploit loop-mediated isothermal amplification (LAMP) for the detection of SARS-CoV-2 and evaluate its performance by comparison with rRT-PCR.

Methods
Reverse-transcription LAMP (RT-LAMP) assay primers were designed to detect envelop (E) and nucleocapsid (N) genes of SARS-CoV-2. Positive control RNA was prepared by in vitro transcription of E and N genes clones. RT-LAMP amplification reactions were incubated at 65°C for 30 min. Results were recorded visually. RT-LAMP results were evaluated by comparing the results obtained with a commercial rRT-PCR kit.

Results
The RT-LAMP assay for E and N genes was carried out in separate tubes. RT-LAMP detected about 40 copies of SARS-CoV-2 RNA per reaction. A total of 253 throat swabs were tested using the RT-LAMP assay. The overall diagnostic sensitivity and specificity of the LAMP assay were 98.46 and 100 per cent, respectively, as compared to the rRT-PCR.

Interpretation & conclusions
SARS-CoV-2 RT-LAMP assay was designed, standardized and evaluated. The assay showed diagnostic sensitivity and specificity equivalent to rRT-PCR assays. The assay will be useful to increase testing capacity for the detection of SARS-CoV-2 in the country.
Influential Factors on Survival in Gastric Cancer
Authors: Roshanaei Ghodratollah , Kiumarsi Azadeh , Kasaeian Amir , Safari Malihe , Abbasi Mohammad , Rahimi Ali 
Published: March 2022

Background:
Gastric cancer (GC) is one of the conspicuous causes of cancer-related death worldwide. Considering the mounting incidence of this cancer in developing countries such as Iran, determining the influential factors on the survival of involved patients is noteworthy. Hence, we aimed to ascertain the survival rates and the prognostic factors in our GC patients.

Materials and Methods:
In this retrospective cohort study, data of 314 patients with GC in a referral cancer center in Hamadan province of Iran were studied. The outcome of our study was survival time and the influential factors were gender, age at diagnosis, tumor history, tumor grade, surgery history, radiotherapy history, stage of disease, metastasis history, and lymph node involvement. Kaplan − Meier method and log-rank test were used for the calculation and comparing the survival curves and Cox-proportional hazard model was used for the multivariable analysis of prognostic factors.

Results:
In a total of 314 GC patients, the median age at the diagnosis was 63 years (range: 21–92) with most patients (74.84%) being males. The median follow-up time was 2.42 years, and the median survival time was 2 years. The multivariable cox analysis of overall survival (OS) indicated that having distant metastasis increased the hazard of death by about 2.5 times (P < 0.0001, heart rates [HR]: 2.53, 95% confidence interval [CI]: [1.71, 3.75]), and receiving surgery as treatment, decreased the hazard of death up to 36% (P = 0.02, HR: 0.64, 95%CI: [0.46–0.89]). The other variables did not have any significant effects on the OS.

Conclusion:
The results of this study showed that lower survival (greater hazard of death) strongly and significantly associated with having distant metastasis in patients with GC and receiving surgery could significantly decrease the hazard of death in these patients instead.
A literary analysis of Yoruba-Ifá oral poetry and its implication for entertainment and cultural education in Nigeria
Authors: Adeseye Bifátife Olufemi , Olufunwa Harry , Ariremako Afolabi Innocent 
Published: March 2022

The article examines the potentials of Yoruba Ifá oral literature for entertainment and education, with an emphasis on the ways in which the desire for entertainment in narrative poetry can precede educational requirements. The study observes that Ifá narrative is an integral part of the complete Ifá divination process usually packaged in parable format. The inexhaustible nature of its source is affirmed by related studies done by Yoruba language and literature scholars. It is also observed that every attempt at translating any language to another often results in obliterating the imagery of the one being translated in the new presentation; hence, the study adopts the term transliteration. The literary stylistic devices employed in Ifá narratives are discussed; for easy reference, the study classifies the content of Ifá narratives into three principal genres; poetry, drama and music. This discourse is tailored to further appraise specific issues concerning the measurement and scoring Yoruba Ifá poetry using global parameters. The performance essence, as in dramaturgy, of the poetry is reserved for further investigation. Examples of Ese Ifá (Ifá verses) are subjected to repetition, parallelism and tonal counterpoint. The study affirms the applicability of Ifá oral literature to cartoon animation movies geared towards effective indigenization of the Yoruba child as a paradigm of the African child. The structure of the study is woven around folkism theory. The treatment adopts textual analysis in aesthetic evaluative style.
Exploring the Impact of COVID-19 on Communities and the Mitigation Efforts
Authors: Okojie OH 
Published: March 2022

Background: The Coronavirus disease 2019 caused by the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has triggered a pandemic of a proportion that was only seen over a century ago when the Spanish flu ravaged the world in 1918. The focus of this review was to explore the impact of COVID-19 on communities and the mitigation efforts.Discussion: The COVID-19 pandemic has triggered an enormous impact on various communities; including geographical, working, those who have fled conflict areas and academic/research communities with a global surge in the demand for health and social services. There are also some positive impacts such as the boom in research output and global collaboration while bringing to the fore the very important role of public health and community medicine specialty.Conclusion: The COVID-19 pandemic has exposed the enormous deficiencies in health systems including the social and welfare support of various communities. There is need to sustain mitigation efforts that have been instituted and prepare for future pandemics as connected cycles while learning from the past ones.
Keywords: Communities; COVID-19; Impact; Mitigation; SARS-CoV-2
Additional notes on butterflies of the Cape Verde Islands
Authors: Tennent W. John , Russell Peter J.C. 
Published: March 2022

Following the authors’ previously published research on Cape Verde butterflies based on fieldwork conducted in 2013, this paper presents additional data on Cape Verde butterflies as a result of further visits to the islands between 16th June and 17th July 2017, and again from 10th November to 14th December 2017. It reports three new island records (São Nicolau, Santiago and Maio) for Euchrysops osiris (Höpffer, 1855), and one new record (São Nicolau) for Junonia oenone (Linnaeus, 1758), discovered for the first time on the Cape Verde Islands (Santiago) by the authors in 2013. Occurrence of Colias croceus (Geoffroy, 1785) on Sal is discussed and a number of records for the island of Raso in the years 2015-2017 made by the Cambridge University Raso Lark survey team are presented. An updated table of Cape Verde butterflies is also presented, together with an outline map of the islands.
First report of Eriocottidae from Madagascar (Lepidoptera: Tineoidea)
Authors: Mey Wolfram 
Published: March 2022

The genus Filiramifera gen.nov. is established to accommodate the first examined species of Eriocottidae from Madagascar, named as F. naumanni spec. nov. The new species differs from the remaining taxa of the family by the presence of unipectinate antennae and strongly spined abdominal terga of the male. The male genitalia, wing venation and the adult moth are illustrated.
Some phenotypic variation in Leptotes pirithous on the Cape Verde Islands, in a wider geographical context (Lepidoptera: Lycaenidae)
Authors: Tennent W. John , Russell Peter J.C. 
Published: March 2022

Unusual phenotypes of Leptotes pirithous (Linnaeus, 1767) were encountered on islands of the Cape Verde Archipelago in 2013 and 2017. Dark/pale and tailed/tailless forms of this polyommatine lycaenid species are illustrated and discussed. The name capverti Libert, Baliteau & Baliteau, 2011, is considered and the phenotype compared with dark forms elsewhere. It is concluded that many individuals are indistinguishable from the Indian Ocean f. insulana Aurivillius, 1909, and from other dark forms that occur in many localities. L. pirithous host-plants on eight different islands, and observations regarding phenotypes, are tabulated. The three specimens of Aurivillius’ insulana and the holotype and both paratypes of capverti are illustrated for the first time, together with a sample of specimens of L. pirithous from the African mainland, the Cape Verde Islands and other islands in the Atlantic and Indian Oceans.
Signal processing techniques for the spectrophotometric quantitation of binary mixture of dapagliflozin and saxagliptin: A comparative study
Authors: Abdel-Gawad Sherif A. , Arab Hany H. , Hassan Said A. 
Published: March 2022

Purpose: To investigate the advantages and drawbacks of four signal processing methods for spectrophotometric quantitation of mixtures of dapagliflozin and saxagliptin.
Methods: The methods studied were numerical differentiation (ND), Savitzky-Golay filter (SG), discrete Fourier transform (DFT) and continuous wavelet transform (CWT). The resolution powers of the methods were compared via quantitative determination of dapagliflozin (DAP) and saxagliptin (SAX) in laboratory prepared mixtures. Furthermore, a new approach for validating robustness in spectrophotometric methods was developed, and the methods were compared using their robustness.
Results: Continuous wavelet transform (CWT) produced the best results regarding the analysis of the two drugs in different ratios. It also showed a lower limit of quantification (LOQ), when compared to each of the other methods. When the four methods were used for quantitation of pharmaceutical drug formulations, and subjected to validation in line with ICH regulations, they were found to be satisfactorily specific, accurate, precise and robust.
Conclusion: These results show that CWT technique is superior to the other three methods for analysis of drug mixtures with regard to sensitivity and resolving power. Thus, CWT can be used in the routine spectrophotometric analysis of pharmaceuticals in quality control laboratories.
Assessment of wound contraction, re-epithelialization and histological changes in full thickness excision wounds of rats treated with different concentrations of hydrogen peroxide
Authors: Udegbunam Sunday O. , Ogbobe Sunday , Okereke Nnamdi H. , Enejere Adaobi S. , Udegbunam Ijeoma R. , Ezeobialu Toochukwu H. 
Published: March 2022

Purpose: To investigate the impact of treatment with different strengths of hydrogen peroxide (H2O2) on healing of excision-type wounds in rats.
Methods: Thirty-two (n = 8) adult wistar rats randomly assigned to four groups A - D were used for the study. Full-thickness excision-type wound was surgically made on each rat on day 0. While wounds in group A, the control, were treated with 0.9 % normal saline, wounds in groups B - D received 1, 3, and 5 % H2O2, respectively. Following the surgical wounding and treatment, the epithelialization time, wound contraction, and histological changes of the wounds were assessed.
Results: On day 21, animals in group C recorded 100% wound contraction, whereas in groups A, B and D the contraction degrees of 68.75, 79.33 and 79.00 %, respectively, were reported on the same day. Group C animals treated with 3 % of H2O2 had significantly (p < 0.05) higher degree of wound contraction and epithelialization. Histologically, by day 14, wounds of animals in group C presented with a preponderance of fibrocytes over fibroblasts spread across organized connective tissue fibres. Group C treated animals also had significantly (p<0.05) faster epithelialization. No visible side effects were observed in this group following the treatments. However, the wounds of animals in groups A, B and D showed fibroblasts embedded in loose irregular connective tissue fibres with haemorrhagic lesions, alongside pronounced polymorphonuclear cell infiltration.
Conclusion: When compared to other concentrations used in the study, the optimum strength of H2O2 for wound dressing is 3 % in terms of rate of wound contraction, epithelialization time, histological changes and physical tissue damage.