bluuebunny/crossref_metadata_2025 huggingface dataset:
Photometric Metallicity and Distance Estimates for ∼136,000 RR Lyrae Stars from Gaia Data Release 3
Authors: Li Xin-Yi , Huang Yang , Liu Gao-Chao , Beers Timothy C. , Zhang Hua-Wei
Published: February 2023

We present a sample of 135,873 RR Lyrae stars (RRLs) with precise photometric metallicity and distance estimates from our newly calibrated P–ϕ
31–R
21–[Fe/H]/P–R
21–[Fe/H] and G-band absolute magnitude–metallicity relations. The P–ϕ
31–R
21–[Fe/H] and P–R
21–[Fe/H] relations for type RRab and type RRc stars are obtained from nearly 2700 Gaia-identified RRLs, with precise ϕ
31 and R
21 measurements from light curves and metallicity estimates from spectroscopy. Using a few hundreds of nearby RRLs, with accurate distances estimated from the parallax measurements in Gaia Early Data Release 3, new G-band absolute magnitude–metallicity relations and near-IR period–absolute magnitude–metallicity relations are constructed. External checks, using other high-resolution spectroscopic samples of field RRLs and RRL members of globular clusters, show that the typical uncertainties in our photometric metallicity estimates are about 0.24 and 0.16 dex for type RRab and type RRc stars, respectively, without significant systematic bias with respect to the high-resolution spectroscopic metallicity measurements. The accuracies of these metallicity estimates are much improved, especially for type RRab stars, when compared to those provided by Gaia Data Release 3. Validations of our distance estimates, again using members of globular clusters, show that the typical distance errors are only 3%–4%. The distance moduli μ
0 = 18.503 ± 0.001 (stat) ± 0.040 (syst) mag for the Large Magellanic Cloud (LMC) and μ
0 = 19.030 ± 0.003 (stat) ± 0.043 (syst) mag for the Small Magellanic Cloud (SMC) are estimated from our type RRab star sample and are in excellent agreement with previous measurements. The mean metallicities of the LMC and SMC derived in this work are also consistent with previous determinations. Using our sample, a steep metallicity gradient of −0.024 ± 0.001 dex kpc−1 is found for the LMC, while a negligible metallicity gradient is obtained for the SMC.
Dust Echoes from Luminous Fast Blue Optical Transients
Authors: Metzger Brian D. , Perley Daniel A.
Published: February 2023

Luminous fast blue optical transients (LFBOTs) such as AT2018cow form a rare class of engine-powered explosions of uncertain origin. A hallmark feature of these events is radio/millimeter synchrotron emission powered by the interaction of fast ≳0.1c ejecta and dense circumstellar material (CSM) extending to large radii ≳1016 cm surrounding the progenitor. Assuming this CSM to be an outflow from the progenitor, we show that dust grains up to ∼1 μm in size can form in the outflow in the years before the explosion. This dusty CSM would attenuate the transient’s ultraviolet emission prior to peak light, before being destroyed by the rising luminosity, reddening the premaximum colors (consistent with the premaximum red-to-blue color evolution of the LFBOT candidate MUSSES2020J). Reradiation by the dust before being destroyed generates a near-infrared (NIR) “echo” of luminosity ∼1041–1042 erg s−1 lasting weeks, which is detectable over the transient’s rapidly fading blue continuum. We show that this dust echo is compatible with the previously unexplained NIR excess observed in AT2018cow. The gradual decay of the early NIR light curve can result from CSM, which is concentrated in a wide-angle equatorial outflow or torus, consistent with the highly aspherical geometry of AT2018cow’s ejecta. Premaximum optical/UV and NIR follow-up of LFBOTs provide a new probe of their CSM environments and place additional constraints on their progenitors.
Nondetection of CHIME/Fast Radio Burst Sources with the Arecibo Observatory
Authors: Good Deborah C. , Chawla Pragya , Fonseca Emmanuel , Kaspi Victoria , Meyers B. W. , Pleunis Ziggy , Sand Ketan R. , Scholz Paul , Stairs I. H. , Tendulkar Shriharsh P.
Published: February 2023

In this work, we present follow-up observations of two known repeating fast radio bursts (FRBs) and seven nonrepeating FRBs with complex morphology discovered with the CHIME/FRB project. These observations were conducted with the Arecibo Observatory 327 MHz receiver. We detected no additional bursts from these sources, nor did CHIME/FRB detect any additional bursts from these sources during our follow-up program. Based on these nondetections, we provide constraints on the repetition rate for all nine sources. We calculate repetition rates above 1 Jy using both a Poisson distribution of repetition and the Weibull distribution of repetition presented by Oppermann et al. For both distributions we find repetition upper limits of the order λ = 10−2–10−1 hr−1 for all sources. These rates are much lower than those published for notable repeating FRBs like FRB 20121102A and FRB 20201124A, suggesting the possibility of a low-repetition subpopulation.
Turbulence Driving by Interstellar Pickup Ions in the Outer Solar Wind
Authors: Isenberg Philip A. , Vasquez Bernard J. , Smith Charles W.
Published: February 2023

We revisit the question of how the unstable scattering of interstellar pickup ions (PUIs) may drive turbulence in the outer solar wind and why the energy released into fluctuations by this scattering appears to be significantly less than the standard bispherical prediction. We suggest that energization of the newly picked-up ions by the ambient turbulence during the scattering process can result in a more spherical distribution of PUIs and reduce the generated fluctuation energy to a level consistent with the observations of turbulent intensities and core solar wind heating. This scenario implies the operation of a self-regulation mechanism that maintains the observed conditions of turbulence and heating in the PUI-dominated solar wind.
Atmospheric Pressure and Molecular Cloud Formation in Early-type Galaxies
Authors: Babyk Iu. V. , McNamara B. R. , Nulsen P. E. J. , Russell H. R. , Edge A. C. , Blitz Leo
Published: February 2023

A strong correlation between atmospheric pressure and molecular gas mass is found in central cluster galaxies and early-type galaxies. This trend and a similar trend with atmospheric gas density would naturally arise if the molecular clouds condensed from hot atmospheres. Limits on the ratio of molecular to atomic hydrogen in these systems exceed unity. The data are consistent with ambient pressure being a significant factor in the rapid conversion of atomic hydrogen into molecules as found in normal spiral galaxies.
Metabolic rate, sleep duration, and body temperature in evolution of mammals and birds: the influence of geological time of principal groups divergence
Authors: Gavrilov Valery M. , Golubeva Tatiana B. , Bushuev Andrey V.
Published: February 2023

This study contains an analysis of basal metabolic rate (BMR) in 1817 endothermic species. The aim was to establish how metabolic scaling varies between the main groups of endotherms during evolution. The data for all the considered groups were combined and the common exponent in the allometric relationship between the BMR and body weight was established as b = 0.7248. Reduced to the common slope, the relative metabolic rate forms the following series: Neognathae – Passeriformes – 1.00, Neognathae – Non-Passeriformes – 0.75, Palaeognathae – 0.53, Eutheria – 0.57, Marsupialia – 0.44, and Monotremata – 0.26. The main finding is that the metabolic rate in the six main groups of mammals and birds consistently increases as the geological time of the group’s divergence approaches the present. In parallel, the average body temperature in the group rises, the duration of sleep decreases and the duration of activity increases. BMR in a taxon correlates with its evolutionary age: the later a clade diverged, the higher is its metabolic rate and the longer is its activity period; group exponents decrease as group divergence nears present times while with increase metabolic rate during activity, they not only do not decrease but can increase. Sleep duration in mammals was on average 40% longer than in birds while BMR, in contrast, was 40% higher in birds. The evolution of metabolic scaling, body temperature, sleep duration, and activity during the development of endothermic life forms is demonstrated, allowing for a better understanding of the underlying principles of endothermy formation.
L’accès à l’Assistance Médicale à la Procréation (AMP) pour les couples de femmes et les femmes seules : témoignage d’un responsable d’un centre d’AMP, quelles conséquences en pratique ?
Authors: Belaisch-Allart Joëlle
Published: February 2023

Après une très longue gestation, la loi dite de bioéthique a enfin été promulguée le 2 août 2021 mais nous attendons encore la publication de certains décrets d’application. Cette loi va-t-elle vraiment révolutionner la pratique de l’AMP en France, nombre de professionnels en doutent… En théorie, les couples de femmes et les femmes seules dénommées femmes non mariées dans la loi vont pouvoir être prises en charge, c’était la mesure phare de la loi, celle qui a éclipsé toutes les autres. En pratique, ces femmes vont consulter leur gynécologue ou les centres d’AMP qui vont les adresser au Centre d’étude et de consevation des oeufs et du sperme (CECOS) le plus proche pour obtenir la précieuse paillette de sperme. Dans quel délai l’obtiendront-elles, nul ne sait, mais pas plus rapidement que les couples hétérosexuels qui attendent un an voire plus. Quel effet va avoir la levée de l’anonymat sur les donneurs ? Si les donneurs français se comportent comme ceux des autres pays ou l’anonymat a été levé ils vont dans un premier temps diminuer et il n’est pas sûr que la campagne de presse de l’Agence de Biomédecine (ABM) ait un effet positif !
Le témoignage des CECOS au sujet de l’accès à l’assistance médicale à la procréation avec don de spermatozoïdes et à l’accès aux « origines »
Authors: Metzler-Guillemain Catherine
Published: February 2023

La fédération des CECOS (Centres d’Études et de Conservation des Œufs et du Sperme) rassemble la majorité des centres autorisés pour la gestion des activités d’Assistance Médicale à la Procréation (AMP) avec tiers donneur (97 % des centres autorisés pour le don de spermatozoïdes, 80 % des centres autorisés pour de don d’ovocytes, 80 % des centres autorisés pour l’accueil d’embryon). La loi n° 2021-1017 du 2 août 2021 relative à la bioéthique prévoit de nombreux changements dans les pratiques des centres d’AMP, notamment concernant l’AMP avec tiers donneur : la prise en charge de couples de femmes ou de femmes non mariées, le recours au double don de gamètes, la possibilité (sous conditions) d’accès aux données non identifiantes et à l’identité du tiers donneur même pour des personnes majeures nées antérieurement à cette loi. Plus de 40 000 personnes actuellement majeures sont nées suite au recours à l’AMP avec tiers donneur au sein des CECOS. Combien d’entre elles solliciteront la commission d’accès aux données non identifiantes et à l’identité du tiers donneur ? Quelles réponses auront-elles ? Quelles conséquences auront ces mesures sur les anciens donneurs et leur famille ? Par ailleurs, comment assurer des délais d’attente raisonnables pour tous les receveurs en don de spermatozoïdes ? La France veut mettre en place un système reposant sur des valeurs comme la non-rémunération du don et des donneurs motivés par l’altruisme, des receveurs pris en charge en don de spermatozoïdes avec un délai raisonnable, et une couverture par l’assurance maladie pour tous. Le défi est à relever, il impose une coopération parfaite entre les professionnels, les tutelles et les instances gouvernementales afin de répondre aux attentes des patients.
Conservation des gamètes sans indication médicale : une nouvelle possibilité mais des interrogations pratiques
Authors: Bujan Louis
Published: February 2023

La loi relative à la bioéthique du 2 août 2021 donne la possibilité à toute personne majeure de pouvoir conserver ses gamètes, en absence d’indication médicale, pour une utilisation ultérieure à son profit. Cette disposition soulève de nombreuses questions pratiques. Le prélèvement de gamètes étant bien plus simple chez l’homme et l’intérêt d’une telle conservation étant discutée, la conservation des ovocytes sera principalement abordée dans ce travail. Concernant l’âge de la femme en bénéficiant, un équilibre est nécessaire entre un âge trop précoce qui ferait apparaître cette conservation comme inutile et un âge trop tardif qui rendrait la technique non efficiente. La question du nombre de ponctions ovariennes se pose à la lumière du nombre d’ovocytes nécessaires pour une chance raisonnable d’avoir un enfant. Le caractère invasif de la méthode impose un bilan rigoureux afin de prévenir les potentiels effets indésirables et ce d’autant plus qu’il n’y a pas d’indication médicale. La question de l’information est d’intérêt majeur dans la mesure où les contraintes et limites de la méthode doivent être explicitées afin de ne pas donner de faux espoirs aux femmes. Si la loi prévoit un suivi de la conservation et, à l’arrêt de celle-ci, une requalification des gamètes notamment vers le don, sa mise en place n’apparait pas simple. Le nombre de femmes recourant à cette méthode ne peut être qu’hypothétique mais si seulement 5 à 10 % des femmes de 30 ans s’orientent vers la conservation cela imposera des moyens supplémentaires pour les centres pour répondre à la demande.
Les enfants présentant une variation du développement génital
Authors: Bouvattier Claire , Martinerie Laetitia
Published: February 2023

Les variations du développement génital sont des situations cliniques rares où l’anatomie des organes génitaux est inhabituelle, à cause d’une combinaison rare des gonosomes (chromosomes X et/ou Y), d’une variation du développement des testicules ou des ovaires, ou bien de la sécrétion et/ou de l’action des hormones sexuelles. La prise en charge médico-chirurgicale des enfants est actuellement questionnée par la société et le législateur et ne doit plus avoir pour seule préoccupation de conformer ses organes génitaux aux standards masculin ou féminin, dans le respect des droits de l’enfant, de son intégrité physique et de sa capacité à participer aux décisions thérapeutiques qui le concernent. Depuis la loi relative à la bioéthique d’août 2021, tous les dossiers de personnes présentant une variation sévère du développement génital sont discutés en réunion de concertation pluri-disciplinaire nationale, et les décisions de traitement éventuelles envisagées au regard de la nécessité médicale et du consentement de la personne concernée.
La république turque a 100 ans. Qu’en est-il de sa population ?
Authors: Yildiz Dilek , Adali Tugba , Özdemir Caner
Published: February 2023

En octobre 2023, la république de Turquie célébrera son 100 e  anniversaire. Depuis sa fondation, la population du pays est passée de 13,5 millions d’habitants lors du premier recensement de 1927 à 84,7 millions en 2021, et l’indice synthétique de fécondité de 6 naissances par femme à moins de 2 au cours de la même période. Avec une diminution continue de sa mortalité, la population commence à montrer les premiers signes de vieillissement. En termes de migration, la Turquie, autrefois un pays d’origine, est progressivement devenue un pays de transit et d’accueil pour les migrants, principalement en provenance de Syrie et d’autres pays du Moyen-Orient. L’intention d’émigrer de Turquie est élevée parmi les jeunes, en raison de l’incertitude du pays confronté à des crises économiques et un chômage élevé.
Stratégie nationale d’influence : une architecture à inventer
Authors: Buhler Pierre
Published: February 2023

Face aux attaques croissantes d’États autoritaires contre nos systèmes démocratiques, il est urgent de réagir et de ne pas subir. D’où la décision française de construire une stratégie nationale d’influence ; une première parmi les pays où l’État de droit constitue le socle politique. Il faut désormais en construire l’architecture avec les moyens associés.
Ukraine, Russie et high-tech , un an après le déclenchement de l’invasion
Authors: Dugoin-Clément Christine
Published: February 2023

Paradoxalement, la Russie a tardé dans la mise en œuvre de moyens high-tech comme les drones et la guerre électronique. Le cyber a été et reste un lieu de confrontation, mais sans avantage décisif pour Moscou. À l’inverse, l’Ukraine a dès le début utilisé toutes les ressources de la Tech avec une efficacité reconnue.
Impact de la guerre en Ukraine sur la Transformation de l’Alliance
Authors: Paloméros Jean-Paul
Published: February 2023

La guerre en Ukraine a eu un impact majeur sur l’Alliance atlantique, accélérant son processus de transformation, tout en apportant un soutien important à Kiev. L’Otan doit poursuivre ses évolutions pour accroître ses capacités à affronter ces nouvelles menaces et à accepter d’identifier ses points de faiblesse.
Ukraine : quelles sorties de guerre ?
Authors: Berg Eugène
Published: February 2023

Il est encore trop tôt, malgré une guerre de haute intensité, d’entrevoir une sortie de crise. Trop d’inconnues à ce stade du conflit mais une certitude, la Russie s’enfonce dans un chaos dramatique tandis que l’Ukraine malgré les souffrances endurées, incarne la ténacité et l’espoir de la liberté.
L’actuelle guerre de la Russie en Ukraine : une analyse multidimensionnelle (2/2)
Authors: Vinet Guy
Published: February 2023

La guerre conduite par Vladimir Poutine contre l’Ukraine traduit une ambition impérialiste visant à réintégrer ce pays récalcitrant dans l’espace post -soviétique. C’est aussi un gâchis effroyable, isolant durablement la Russie désormais hostile à tout ce qui vient d’un Occident largement fantasmé par le Kremlin.
Évaluer l’action éducative des lycées à travers les IVAL : quand le « bruit » s’immisce dans l’administration de la preuve
Authors: Núñez-Regueiro Fernando , Bressoux Pascal
Published: February 2023

Chaque année, le ministère de l’Éducation nationale publie des indicateurs de valeur ajoutée des lycées (IVAL) visant à mesurer l’efficacité des actions éducatives. Conçus comme outils de pilotage fiables, ces IVAL jouent un rôle décisionnel important dans le travail des équipes éducatives. Pourtant, les IVAL sont limités par la non-prise en compte d’une erreur d’échantillonnage qui confond l’action des lycées avec du « bruit » statistique ( i.e. , les effets du hasard). Retraçant l’historique de ces indicateurs – depuis leurs origines dans la recherche sur les effets-établissement, jusqu’à leur diffusion en France –, cette étude montre en quoi cette non-prise en compte de l’erreur d’échantillonnage pose un problème de mesure qui contrarie une évaluation fiable de l’action éducative. Pour pallier cette difficulté, des stratégies d’estimation alternatives sont proposées. La pertinence de cette critique est illustrée à travers l’étude de 112 lycées de l’académie de Grenoble et de leur action éducative sur la réussite au baccalauréat.
« Signaux faibles » : l’innovation publique et l’expertise de la donnée au service des entreprises fragilisées
Authors: Quézel Élodie
Published: February 2023

« Signaux faibles » valorise les données d’entreprises détenues par l’administration pour repérer et accompagner, avant qu’il ne soit trop tard, les entreprises qui sont les plus en difficulté ou fragilisées. La force de cet outil tient au partenariat interministériel qui réunit la DGE et la DGFiP (au sein du ministère chargé de l’Économie), la DGEFP (au sein du ministère chargé du Travail), ainsi que la Banque de France et l’URSSAF Caisse nationale, avec le soutien méthodologique de la DINUM (avec en son sein l’incubateur beta.gouv.fr ). Dans cet article, nous revenons sur la singularité de cette démarche qui, inspirée des méthodologies Produits agiles (ou lean management ), dite des start-ups d’État, a permis la construction d’un outil numérique au service de la sauvegarde de nos entreprises.
Le Comité interministériel de restructuration industrielle
Authors: Garcin Cédric
Published: February 2023

Le CIRI a fêté ses 40 ans en 2022, en pleine transition entre la crise du Covid et la crise énergétique et le retour de l’inflation qui touchent la France et le monde. Structure légère, créée au sein de la direction générale du Trésor pour accompagner les restructurations d’entreprises, le CIRI est l’héritier du CIASI, qui lui a transmis les principes fondamentaux qui guident aujourd’hui son action. Si l’économie française a profondément changé depuis 1982 et si les restructurations financières sont devenues plus complexes et le secteur s’est professionnalisé, le CIRI reste un organisme de place que les acteurs du restructuring sollicitent pour sa capacité à concilier des intérêts souvent antinomiques et à faire prévaloir la préservation des emplois durables et le respect des règles encadrant les négociations. Fortement sollicité durant la crise du Covid, le CIRI intervient aujourd’hui en soutien des entreprises touchées par l’explosion des prix de l’énergie.
Politique de traitement des difficultés des entreprises en région Occitanie
Authors: Delga Carole
Published: February 2023

Le traitement des difficultés des entreprises se fait au sein de la cellule régionale pluridisciplinaire de veille et d’alerte précoce animée par les deux commissaires au redressement productif présents sur le territoire d’Occitanie. Les moyens d’intervention des partenaires sont ainsi mobilisés en coordination pour préserver l’emploi dans les territoires. Cela recouvre : l’échange d’informations confidentielles sur des entreprises en difficulté afin d’établir rapidement un diagnostic partagé ; la recherche de solutions pour favoriser la poursuite de l’activité : plan d’apurement URSSAF en cas de dettes fiscales ou sociales ; mise en place de la médiation bancaire en absence d’accès au financement ; lancement de prestations d’analyse de performance par le biais d’Expertise GEODE de la Banque de France si le problème est structurel ; prescription d’un des dispositifs déployés par la région Occitanie, à savoir : « Garantie Relance Foster », « Prêt Relance » ou « Aide au conseil stratégique » pour prévenir une situation délicate, et « Contrat Entreprise en difficulté » ou « Contrat Crise de Trésorerie Covid », si est identifié un besoin de financement pour compléter un tour de table ; et, le cas échéant, recherche de repreneurs avec le concours de l’agence Ad’Occ.
Le rôle des banques d’affaires dans les restructurations
Authors: Le Pape Jacques
Published: February 2023

Dans les dossiers de restructuration complexes, on voit souvent intervenir des banques d’affaires. Cela est justifié par l’importance des montants en cause, les fortes contraintes de calendrier et la technicité des situations. Une autre raison de cela est que les questions à traiter portent en fait sur la façon d’apporter des financements nouveaux à une entreprise potentiellement défaillante : quel est le retour attendu sur ces concours ? Quels sont les droits attachés ? Quelle est la valeur revenant aux actionnaires historiques ? Quelle est la priorité affichée par les différents prêteurs – être en tout ou partie remboursés ou convertir la dette de l’entreprise en actions ? De ce fait, les discussions se rapprochent fortement de celles rencontrées dans les fusions-acquisitions.
Comprendre le fonctionnement des écosystèmes économiques territoriaux et s’y insérer : une dimension essentielle du rôle des CRP
Authors: Anstett Sandrine , Theveniaud Pascal
Published: February 2023

Si les circulaires successives ont priorisé l’action des CRP sur les entreprises industrielles de plus de 50 salariés, rapidement leur mobilisation s’est adaptée aux enjeux et spécificités de chaque territoire. Les solutions concrètes pour accompagner les entreprises fragiles ou en difficulté ont souvent été le résultat d’un travail collaboratif entre les acteurs publics et privés composant l’écosystème local. Chaque cas d’entreprise traité a permis de renforcer la confiance et le partenariat entre les différentes parties prenantes au profit du tissu industriel local et du territoire.
Chemistry project-based learning for secondary metabolite course with ethno-STEM approach to improve students' conservation and entrepreneurial character in the 21st century
Authors: Sudarmin Sudarmin , Pujiastuti Rr. Sri Endang , Asyhar Rayandra , Tri Prasetya Agung , Diliarosta Skunda , Ariyatun Ariyatun
Published: February 2023

This research aims to develop chemistry project-based learning with an Integrated Ethnoscience Approach in Science, Technology, Engineering, and Mathematics (Ethno-STEM) to improve students' conservative and entrepreneurial character. The research method refers to the Research and Development (R&D) model with the Four D by Thiagarajan (1997). The research samples are chemistry education students from Universitas Negeri Semarang. The model effectiveness test was conducted in secondary metabolite lectures at the Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Negeri Semarang, Indonesia. Data collection techniques used expert validation sheets to assess the feasibility of the model and observation sheets and questionnaires to measure students' conservative and entrepreneurial character. Based on the results of research, it was concluded that a chemical project-based learning model for the secondary metabolites course on essential oils and terpenes and learning tools with an Ethno-STEM approach was feasible and effective for improving students' conservative and entrepreneurial character with moderate and high criteria based on the N-gain score. The chemical batik motif on canvas based on the secondary metabolites' chemical structure is attractive and creative.
Improved utilization of hybrid energy for low-income houses based on energy consumption pattern
Authors: Kgopana Khuthadzo , Popoola Olawale
Published: February 2023

The adoption of solar photovoltaic and small wind turbine hybrid energy systems in residential applications has picked up promising development around the globe. However, the uncertainty of renewable energy generation associated with the reliance on climate conditions is one of the factors which affect the reliability of the system. Therefore, there is a need to develop an energy management scheme for improving the reliability of the system. One of the drawbacks of hybrid renewable energy systems is the high investment cost, particularly looking at low-income family units. This present paper, an extension of the preceding work, focused on the development of an energy utilization scheme of a hybrid energy system particularly for low-income houses based on energy consumption patterns. The utilization scheme is developed using computational methods in a MATLAB environment. Energy storage systems considered in this work are electrochemical batteries and small-scale flywheel energy storage (kinetic energy storage). Utilizing hybrid energy based on consumption patterns has lowered the capacity of the system's components, resulting in a 0.00 investment cost. The flywheel energy storage is prioritized to supply high-wattage loads while the battery is prioritized to supply average loads, resulting in a 33.9% improvement in battery health. This hybrid system contains a high proportion of renewable energy and reduces annual electricity costs by 96.7%. The simulated results on MATLAB software showed an improvement in terms of energy utilization of a hybrid power system. The cost of utilizing energy is reduced by effectively utilizing more renewable energy sources, with a resultant reduction in electricity bills.
A predictor-corrector interior-point algorithm for $ P_{*}(\kappa) $-weighted linear complementarity problems
Authors: Zhang Lu , Chi Xiaoni , Zhang Suobin , Yang Yuping
Published: February 2023

In this paper, we present a predictor-corrector interior-point algorithm for $ P_{*}(\kappa) $-weighted linear complementarity problems. Based on the kernel function $ \varphi(t) = \sqrt{t} $, the search direction of the algorithm is obtained. By choosing appropriate parameters, we prove that the algorithm is feasible and convergent. It is shown that the proposed algorithm has polynomial iteration complexity. Numerical results illustrate the effectiveness of the algorithm.
Lírics moderns del 1914: Josep Carner i Guillaume Apollinaire
Authors: Audí Marc
Published: February 2023

L’article compara dos llibres apareguts quasi de manera contemporània, La paraula en el vent de Josep Carner el 1914 I Alcools de Guillaume Apollinaire l’any 1913. Són llibres cabdals de la poesia del segle XX dins de les tradicions a les quals pertanyen. Ambdós renovellen el lirisme amorós, amb resultats notablement diferents, però també amb similituds. I ambdós fan ús de la idea de modernitat poètica, aquí amb resultats quasi oposats.
¿Revolución de las pantuflas? La lucha noviolenta por la democracia en la República de Belarús
Authors: Kárpava Alena , Jiménez José Ángel Ruiz
Published: February 2023

En los últimos 20 años han aumentado las movilizaciones noviolentas orientadas al cambio de los regímenes autoritarios hacia modelos democráticos. Nuestra mirada se centra en un movimiento de acción noviolenta e iniciativa femenina, basado en los principios de la Ética del Cuidado, nacido en agosto de 2020 a partir de las elecciones presidenciales en la República de Belarús. Consideramos que se trata de un movimiento diferente respecto a las revoluciones de colores, aunque los Gobiernos ruso y belarruso insistan en su vinculación con estas últimas. El objetivo de la presente investigación es dar a conocer este nuevo movimiento para lo que recurrimos a la metodología del análisis documental. La temática estudiada forma parte de los estudios de Irenología, la ciencia de la investigación para la paz.
A constituição da língua portuguesa como elemento de identidade nacional no Portugal institucional contemporâneo: raça, capital e globalização
Authors: Amarelo Daniel
Published: February 2023

Por meio da consulta de materiais do Arquivo Nacional da Torre do Tombo, e de acordo com a glotopolítica e a sociolinguística crítica, este artigo analisa o papel do português como elemento de coesão nacional e internacionalização através de dois grandes eventos político-linguísticos: a Comissão Nacional dos Centenários (1938-1943) e a Comissão Nacional para as Comemorações dos Descobrimentos Portugueses (1986-2002). Contrariamente a outros Estados, em que distintas nações e línguas estão sob um mesmo sistema jurídico-político, onde a opressão das minorias foi mais acentuada em períodos ditatoriais e menor na atualidade, defendemos que o caso português é a contrario. No marco da globalização e da democratização, o valor do português poderá mobilizar um tipo de identidade renacionalizadora, mediante processos de racialização da população colonizada e de desligação simbólica com as comunidades emigradas.
Conflitos coletivos no trabalho em plataformas digitais: desafios à proteção da liberdade sindical no Brasil
Authors: Machado Sidnei , Conradt Michael Willian
Published: February 2023

Este artigo analisa o exercício do direito à liberdade sindical no âmbito das plataformas digitais de trabalho no Brasil. O objetivo é discutir as insuficiências e as respostas normativas do direito brasileiro em conflitos coletivos de trabalho entre trabalhadores e plataformas digitais, em particular no tema de proteção da atividade sindical. A metodologia utilizada foi a revisão de literatura e o estudo empírico de casos, com o uso de dados de investigações do Ministério Público do Trabalho e de processos judiciais da Justiça do Trabalho. A partir da análise de casos de violação da liberdade sindical por plataformas digitais, são apresentadas conclusões no sentido de que existe insuficiente proteção à liberdade sindical no país, com um conjunto de desafios para a construção de um modelo protetivo adequado.
Performance Comparison for Hearth Rate Signal Detection for Different Location in Fingertip and Wrist Using Sensor MAX30102
Authors: Gunawan Rohmat , Andang Asep , Ridwan Muhammad
Published: February 2023

Abstract. Measuring vital body signals is essential to measure basic body functions, prevent misdiagnosis, detect underlying health problems and motivate healthy lifestyle changes. Vital body signals are measured at the fingertips because the skin is thin, and the blood vessels are transparent. Visible light is passed at the fingertips, and the pulses generated are still acceptable on the outer nail. However, the body's vital signal measuring device continuously attached to the fingertip causes discomfort to the user. Therefore, in this study, it is proposed to measure the body's vital signals in other body parts. The wrist was chosen to be attached to the body's vital signal measuring device because the measuring device attached to the wrist allows it to continue to be used. This study aims to measure the body's vital signals, especially heart rate, on the wrist so that the correlation level of the measurement data is known. The main contribution of this study is built an electronic system to measure vital body signals, especially heart rate at the wrist with the help of the MAX30102 sensor that uses visible light with 650 - 670 nm. The MAX30102 sensor, which uses visible light with 650 - 670 nm, was selected for measurement. The ratio of the light reflected through the fingertips compared to the wrist. The result of measuring the heart rate signal on the wrist is in the form of a relatively flat wave so that the data sharpening process is carried out using the detrend method. The results showed that the measurement of heart rate signals at the wrist and fingertips of 15 respondents had accuration 85%. The accuration value shows that the data from the heart rate signal at the wrist is closely correlated with the data from the measurement of the heart rate signal at the fingertips. Therefore, measurements of heart rate signals, usually performed on the fingertips, can also be performed on the wrist. From the test results with a strong accuration, measurements are always taken when the hand can measure the place to measure vital signals, which is usually done at the fingertips.
Synthesis Techniques of Bioceramic Hydroxyapatite for Biomedical Applications
Authors: Sadiq Taoheed Olohunde , Sudin Izman , Idris Jamaliah , Fadil Nor Akmal
Published: February 2023

The need to develop surviving implants and bone substitutes with good biocompatibility, mechanical strength and bioactivity, without causing toxicity, immune rejection and cancer had attracted the attention of many researchers over the years. Hydroxyapatite (HA) is one of the excellent calcium phosphates and major mineral component of vertebrate bone and teeth, which considerably enhances the biocompatibility, mechanical strength and bioactivity of artificial biomaterials in the body system. In addition, it creates porous and rough coated surface that aids the cell attachment, proliferation and the growth of tissue on the bone implants. Due to its high demand in biomedical applications, scientists had developed several, simple and efficient techniques to produce HA. This review outlines several techniques of manufacturing HA and summarizes the merits and demerits of each technique. Keywords: Biomaterials, calcium phosphate, hydroxyapatite, preparation techniques and bone
Risk Perception in the COVID-19 pandemic; a health promotion approach
Authors: Arefi Maryam Feiz , Babaei Amin Pouya , Barzanouni Somaye , Ebrahimi Sahar , Salehi Amir Reza , Khajehnasiri Farahnaz , Poursadeghian Mohsen
Published: February 2023

BACKGROUND:

Many measures have been taken so far to minimize the outbreak of COVID-19, but it is still unclear to what extent people have understood the risk. Public participation plays a vital role in better and effective control of the coronavirus, and the importance of risk perception is effective in their preventive behavior. The aim of this study was to investigate the pandemic risk perception of coronavirus disease after began of pandemic in Iranian society.

MATERIALS AND METHODS:

This cross-sectional study was conducted in Iran in spring 2020. The data collection tool was a researcher-made questionnaire. The questions were extracted through interviews with experts and summarizing the opinions of public interviews, etc., The questionnaire was made available to the public through social media. The information was collected within 3 months. Quantitative data were reported as mean ± standard deviation and the qualitative data were reported as number and percent. Multiple linear regression and cross were also used to examine the demographic factors associated with risk perception. Data Analysis was performed using the SPSS version 21 statistical software.

RESULTS:

In this study, 402 individuals from 28 provinces (Azarbaijan Gharbi, Azarbaijan Sharghi, Alborz, Ardabil, Bushehr, Chaharmahal and Bakhtiari, Esfahan, Fars, Ghazvin, Gilan, Golestan, Hamedan, Hormozgan, Ilam, Kerman, Kermanshah, Khorasan Razavi, Khorasan Shomali, Khuzestan, Kohgiluyeh and Boyerahmad, Kurdistan, Lorestan, Mazandaran, Semnan, Sistan and Baluchestan, Tehran, Yazd, and Zanjan) of Iran participated. The risk perception score obtained from the sum of the scores of the questions was classified into quartiles. Accordingly, the risk perception score of (22.9) 92 people was very low, (26.6) 107 people low, (26.9) 108 people moderate, and (23.6) 95 people high. The results of multiple linear regression showed that the variables of gender (P = 0.008) and occupation (P = 0.013) had a significant relationship with risk perception. There was no significant relationship between risk perception and variables of age, marital status, and level of education (P > 0.05).

CONCLUSION:

The study showed that the risk perception of the people is more in categories of moderate to high. Assessing the risk perception of a pandemic can be helpful for preventive measurements and planning, and also, according to the results of the research, can be done appropriate educational interventions. Given that 47.5% of respondents were employees, of course, it should be noted that in sending a questionnaire virtually, there is usually a lot of loss and this is a limitation of the research. The results of this study can be useful in making prevention decisions and maintaining safety and health in the workplace.
Online learning self-efficacy
Authors: Ahmadipour Habibeh
Published: February 2023

BACKGROUND:

Online learning self-efficacy is considered a major contributor to academic success. The present study was conducted to assess the psychometric properties of the Persian version of the Online Learning Self-Efficacy Scale.

MATERIALS AND METHODS:

A cross-sectional study was conducted on 211 medical students at Kerman University of Medical Sciences in 2021 who were selected through the convenience method. Data were collected using a two-part self-administered online questionnaire containing demographic information and the Persian version of the Online Learning Self-Efficacy Scale (OLSES). Forward and back-translation methods were used to provide the Persian version of OLSES. Internal consistency of the Persian version was determined by the Cronbach alpha coefficient in a pilot study. Exploratory and confirmatory factor analyses were conducted using SPSS version 20.0 and LISREL version 8.80.

RESULTS:

The mean of the participants’ age was 21.40 ± 2.52 years, and most of them (56.4%) were female. The Cronbach alpha coefficient was determined as 0.74, 0.90, 0.75, and 0.89 for learning, time management, technology use subscales, and the whole scale, respectively. Exploratory factors analysis revealed the justifiability of factor analysis. In confirmatory factor analysis, most of the goodness of fit indices had an acceptable level.

CONCLUSIONS:

Our study found that the Persian version of OLSES had good psychometric properties and can be used as a simple, valid, and reliable tool to assess students’ self-efficacy related to the e-learning environment.
Comparison of Midline and Off-midline specimen extraction following laparoscopic left-sided colorectal resections: A systematic review and meta-analysis
Authors: Bhattacharya Pratik , Hussain Mohammad Iqbal , Zaman Shafquat , Mohamedahmed Ali Yasen , Faiz Nameer , Mashar Ruchir , Sarma Diwakar Ryali , Peravali Rajeev
Published: February 2023

Aims:

This study aims to evaluate comparative outcomes following midline versus off-midline specimen extractions following laparoscopic left-sided colorectal resections.

Methods:

A systematic search of electronic information sources was conducted. Studies comparing ‘midline’ versus ‘off midline’ specimen extraction following laparoscopic left-sided colorectal resections performed for malignancies were included. The rate of incisional hernia formation, surgical site infection (SSI), total operative time and blood loss, anastomotic leak (AL) and length of hospital stay (LOS) was the evaluated outcome parameters.

Results:

Five comparative observational studies reporting a total of 1187 patients comparing midline (n = 701) and off-midline (n = 486) approaches for specimen extraction were identified. Specimen extraction performed through an off-midline incision was not associated with a significantly reduced rate of SSI (odds ratio [OR]: 0.71; P = 0.68), the occurrence of AL (OR: 0.76; P = 0.66) and future development of incisional hernias (OR: 0.65; P = 0.64) compared to the conventional midline approach. No statistically significant difference was observed in total operative time (mean difference [MD]: 0.13; P = 0.99), intraoperative blood loss (MD: 2.31; P = 0.91) and LOS (MD: 0.78; P = 0.18) between the two groups.

Conclusions:

Off-midline specimen extraction following minimally invasive left-sided colorectal cancer surgery is associated with similar rates of SSI and incisional hernia formation compared to the vertical midline incision. Furthermore, there were no statistically significant differences observed between the two groups for evaluated outcomes such as total operative time, intra-operative blood loss, AL rate and LOS. As such, we did not find any advantage of one approach over the other. Future high-quality well-designed trials are required to make robust conclusions.
Monkeypox 2022
Authors: Kapoor Suraj , Varadharajan Ashvin
Published: February 2023

Introduction:

Monkeypox is a rare zoonotic disease that is caused by a virus belonging to the Orthopoxvirus genus and is closely related to smallpox and cowpox viruses. The emerging epidemic amid the current COVID-19 pandemic is a matter of concern and warrants urgent public health attention with key issues discussed in the article.

Aim:

The aim of this study was to explore emerging zoonotic, epidemic threats, future implications, and the way ahead in respect of monkeypox.

Methodology:

Secondary data from official government sites, press information, latest articles, newspapers, and the WHO website were extracted and discussed in the article. The current epidemiology of monkeypox with the difference from the COVID-19 pandemic is highlighted in the study. The most probable factors for the emergence and recent outbreak are also discussed. The period of the study was from May 20, 2022, to May 27, 2022, and was conducted in the medical college of Western Maharashtra.

Results and Discussion:

Total number of 25 articles/government/international websites were assessed. While comparing the number of cases among different countries across the globe, the present outbreak has involved different countries with no geographical continuity, with a maximum number of cases from Portugal, Spain, and the United States of America. A comparison of epidemiological determinants of COVID-19 and monkeypox was done which reveals the lesser pandemic potential of monkeypox as compared to COVID-19.

Conclusion:

The present monkeypox outbreak scenario is different from the previous outbreaks, but with lesser pandemic potential as compared to COVID-19. However, with the increase in the incidence of monkeypox cases in different countries, the fear of cross-border transmission is real. Robust public health surveillance and control measures are vital to address this threat.
Mistreatment of Women During Child Birth - A Narrative Review
Authors: Paliwal Mamta , Singh Manisha , Khoja Manju , Meghwal Mansi , Jaitani Meena , Deviga T. , Vyas Himanshu
Published: February 2023

Respectful maternity care is the universal right of every woman all around the world but recent evidences show that women receive disrespectful care and face abuse during facility-based childbirth. It creates a negative impression of the institutional delivery and indirectly contributes to increases in the maternal morbidity and mortality rate; hence, this narrative review was conducted to identify the various forms of mistreatment, determinants and prevalence of disrespectful maternity care in India. (i) To explore the status of mistreatment of women during childbirth. (ii) To assess the factors responsible for mistreatment experienced by women. Keywords searches of PubMed, Google scholar, manual searches of other relevant journals and references lists of primary articles. Quantitative studies and mixed-method studies on women's experiences of factors responsible for mistreatment during labor were explored, study result revealed that factors affecting respectful maternity care (RMC) include age, religion, income etc., Various types of mistreatments experienced by women during labur were physical abuse (9.3%), nondignified care (14.25%), nonconfidential care (33.95%), neglect/ignore (9.35%), verbal abuse (19.72%), discrimination (7.36%), threats to with hold treatment (8.15%), lack of information (26.2%), delivered alone (9.25%), choice of position denied (10.5%), requested payment of bribe (46.3%), unnecessary separation from baby (4.3%), nonconsented care (49.05%). Mistreatment during labor is common in India and is commonly found in the form of verbal abuse, physical abuse, discrimination, threats to with hold treatment, lack of information, ignored, delivered alone, choice of position denied, companion not allowed, requested payment or bribe, unnecessary separation from body etc., Health care personal plays a major role for providing RMC and in preventing mistreatment during childbirth. They must be aware about the mistreatment during childbirth and its consequences such as increasing maternal mortality rate and decrease no. of institutional delivery.
Assessment of Mother and Child Protection Card Utility in a Rural Block of Odisha
Authors: Dora Susmita , Mohapatra Debjyoti , Taywade Manish , Patro Binod Kumar , Bhatia Vikas
Published: February 2023

Background:

Mother and Child Protection card was introduced for accelerating reduction in maternal, neonatal, and infant mortality and child under-nutrition & meant to be used by both beneficiaries and health care providers. It is a folding pictorial tool designed to assist mothers' understanding and monitor individual progress of maternal and child health and also enable the large networks of ASHAs, AWWs, and ANMs to converge their efforts and utilize the critical contact opportunities more effectively.

Objective:

To assess the completeness of information in MCP card filled by the AWW, ANM, and Beneficiary.

Material and Methods:

Twelve villages in mendhasal block of Khurdha district were selected for this study by multistage stratified random sampling method. MCP cards of Pregnant women from the second trimester onwards and Mothers of children 0-2 years of age were assessed for completeness using a Checklist.

Results:

A total of 34 and 46 items were checked for completeness in the MCP cards of Antenatal and post-natal women. The median entries found to be complete in Antenatal and Post-natal women were 34 and 26. Recording information on demographic details and antenatal care details was high but there was poor maintenance of other records like post-natal care, immunization, and growth chart. It was also found that beneficiaries are not marking the circles in the tablets consumption part.

Conclusion:

The study reported a gap in the maintenance of records in the Mother & Child Protection Card. Training for both the health care providers and mothers is needed for adequate use of the MCP card.