bluuebunny/crossref_metadata_2025_split huggingface dataset:
Proposal and numerical verification of an ultrasmall terahertz source using integrated photonic crystal waveguides for highly efficient differential frequency generation
Authors: Koyama Yota , Oda Hisaya , Ikeda Naoki , Sugimoto Yoshimasa , Ozaki Nobuhiko 
Published: March 2023

Abstract
We propose and numerically investigate integrated photonic crystal waveguides (PhC-WGs) formed in a semiconductor slab to realize an ultrasmall and highly efficient terahertz (THz) wave source. The structure consists of a straight PhC-WG with low-group-velocity and low-dispersion (LVLD) for efficient difference frequency generation (DFG) connected to two PhC-WGs to introduce two fundamental lights into the LVLD PhC-WG. The fundamental light propagating through each PhC-WG designed to enhance their electric fields by the slow-light effect is efficiently coupled to the LVLD PhC-WG owing to the reduced refractive index differences at the boundaries of the heterostructures. The DFG from the two fundamental lights was numerically simulated, and a temporal intensity oscillation corresponding to the difference in frequency was clearly observed. By comparing the DFG intensities of the integrated structures with an LVLD PhC-WG and a strip WG, the estimated DFG intensity from the LVLD PhC-WG was more than 100 times higher than that from the strip WG. These results indicate the effectiveness of the proposed heterostructure in the application of a highly efficient THz source with an ultrasmall footprint compared with conventional materials.
Effects of different aqueous extraction techniques on physicochemical quality and oil recovery of sesame oil
Authors: Singh Gurpreet , Kumar Mohit , Zalpouri Ruchika , Potdar Pratik Pandit , Singh Kamalpreet , Kaur Kulwinder 
Published: March 2023

Sesame is the oldest oilseed crop in agriculture, and it produces more oil than any other crop on the planet. This research aimed to investigate the impact of different oil extraction procedures on sesame seed oil physicochemical quality and oil recovery. The oil was extracted from the clean and healthy seeds using four extraction methods: aqueous, enzyme-assisted aqueous, ultrasound-assisted aqueous and solvent extraction using the Soxhlet apparatus. It was observed that ultrasound-assisted aqueous extracted oil had maximum saponification value and minimum acid value, refractive index, and lower free fatty acid value, compared with aqueous extracted oil and enzyme-assisted aqueous extracted oil. Ultrasound-assisted aqueous extraction method also yielded maximum oil, retrieval followed by enzyme-assisted aqueous extraction and aqueous extraction.
Síndrome de opsoclonus myoclonus ataxia idiopático
Authors: Suclla Lutgarda 
Published: March 2023

Resumen:
Objetivo: Reportar un caso de síndrome de opsoclonus- myoclonus- ataxia en paciente pediátrico y de etiología idiopática, con ausencia de secuelas neurológicas a largo plazo, radicando su importancia al ser la incidencia del OMAS estimada en alrededor de 1/5.000.000, siendo en pediatría el 50 % o más de estos casos de etiología paraneoplásica y un número muy limitado no descrito en la literatura de etiología idiopática, además de que el 70 al 80% de pacientes que sufre dicho síndrome presenta secuelas neurológicas posteriores.
Resumen de caso clínico: Se presenta el caso de una niña de 7 años con diagnóstico de síndrome de opsoclonus mioclonus ataxia descartándose la presencia de tumoraciones en especial neuroblastoma, e infecciones asociadas, por lo que se define como de origen idiopático, en el que se realizó el tratamiento con metilprednisolona en pulso e inmunoglobulina, seguido de uso de corticoesteroides orales los meses siguientes, presento una recuperación casi completa a los dos meses de iniciado el tratamiento.
Conclusiones: El síndrome opsoclonus- mioclonus- ataxia es un desorden neurológico raro en pediatría siendo aún menos frecuente la etiología idiopática como en el caso de nuestra paciente. Siempre se debe descartar primero la presencia de tumores asociados entre ellos el más importante el neuroblastoma y tener en cuenta que si bien se puede limitar solo a los 4 meses de tiempo de enfermedad, el pilar de su tratamiento es el uso de dosis altas de corticoesteroides para evitar que se agrave y posibles secuelas neurológicas en el futuro.
Palabras clave: ataxia, opsoclonus, mioclonus, kinsbourne.
Factores sociodemográficos asociados al estrés en estudiantes de psicología de una universidad peruana
Authors: Medina Oliva Lady Yanide , Negrón Zare Rosa Ydray 
Published: March 2023

El objetivo de este estudio fue determinar la relación de los factores sociodemográficos asociados al estrés en estudiantes de psicología de una universidad peruana. Se aplicó el Inventario de Estrés Académico SISCO en una muestra representativa de 214 estudiantes de una universidad público en el año 2022. Se uso una ficha de datos sociodemográficos, también el estadístico Chi-cuadrado. Para analizar la correlación entre el estrés y la edad, sexo y ciclo académico se utilizó la prueba Chi-cuadrado.
Los resultados demostraron que los estudiantes presentaron estrés moderado de 88.8%, el sexo femenino presentó estrés fuerte de 64%, las edades de 19 a 22 años presentaron un 52.3% de estrés fuerte, el primer ciclo de estudios presentó un nivel fuerte de estrés de 39.3%. Las variables que se asociaron significativamente fueron el sexo (p=.017) y la edad (p=.000). Se concluye que el estrés académico es un problema relevante en la población de estudio, por lo tanto, se debe implementar estrategias para evitar la desaprobación y/o deserción durante su etapa universitaria.
La temperatura como un factor de crecimiento en juveniles de tilapia roja en las condiciones climáticas de CD. Altamirano, guerrero
Authors: Pineda Hernández Itzel , Escobar Sarabia Ludybed , Zavala Hernández Francisco , Carachure Olmos Pedro , Álvarez Díaz Guadalupe , Rodríguez Torres Cesar del Ángel 
Published: March 2023

Se comparó el desarrollo de juveniles de tilapia roja en temperatura promedio de 34oC en condiciones no controladas, para determinar los parámetros físico químico y rasgos productivos (peso y longitud). Se evaluaron 6 tinas de 3 metros de diámetro con un total de 450 organismos por tina donde se llevaron a cabo biometrías sobre el peso y longitud, así como también se contabilizo la sobrevivencia y mortalidad. Se evaluó el estudio a través del análisis de ANAVA y Duncan. Se reportó un oxigeno promedio 5.5 mg/l en cada tina; un pH 7.8; se concluye que Tilapia roja tiene un crecimiento desigual a través del análisis estadístico con los rasgos productivos y la prueba de t-student. Alcanzando un peso 28 g y longitud 12 cm. Con un factor de conversión alimenticia de 1,2 y 2,0 para cada tina de geomembranas. Las ECA fueron de 81,6 y 39,7% para cada tina, con mortalidad de 19, 68%. Con las pruebas estadísticas se muestra que no existieron diferencias significativas en los rasgos productivos de los organismos. Pero se presentó problemas de exoltamia y bacterias como Streptococcus iniae y Aeromonas hydropilas debido a las altas temperaturas registradas de hasta 34 OC durante su proceso de evaluación.
The Effect of Metallicity on the Nonequilibrium Abundance of Hydrogen-dominated Exoplanet Atmospheres
Authors: Soni Vikas , Acharyya Kinsuk 
Published: March 2023

Abstract
The atmospheric metallicity greatly influences the composition of exoplanet atmospheres. The effect of metallicity on the thermochemical equilibrium is well studied, though its effect on the disequilibrium abundance is loosely constrained. In this study, we have used the quenching approximation to study the effect of metallicity on the quenched abundance for a range of parameters (temperature: 500–2500 K, pressure: 10−4–103 bar, metallicity: 0.1–1000× solar metallicity). We determine the chemical timescale by finding rate-limiting steps in a reduced chemical network with a network-analysis tool and the thermochemical equilibrium abundance. The equilibrium abundance results are similar to the literature. The CO, H2O, and CO2 abundances increase with metallicity in the parameter range considered. The CH4 abundance increases with metallicity for CO/CH4 < 1 and is unaffected for CO/CH4 > 1. The chemical timescale of CO shows minimal change with metallicity, while the CH4 chemical timescale is inversely proportional to atmospheric metallicity. The quench level of CO shifts into the high-pressure region, and the quench level of CH4 shows complex behavior with metallicity. We benchmarked the quenching approximation with a one-dimensional photochemistry-transport model for two test exoplanets (GJ 1214 b and HD 189733 b) and found it to be in good agreement. We also found that the quenching approximation is a powerful tool to constrain atmospheric parameters. We demonstrated this by constraining the metallicity and transport strength for the test exoplanets HR 8799 b, HD 189733 b, GJ 436 b, and WASP-39 b.
The Ages of Galactic Bulge Stars with Realistic Uncertainties
Authors: Joyce Meridith , Johnson Christian I. , Marchetti Tommaso , Rich R. Michael , Simion Iulia , Bourke John 
Published: March 2023

Abstract
Using modern isochrones with customized physics and carefully considered statistical techniques, we recompute the age distribution for a sample of 91 microlensed dwarfs in the Galactic bulge presented by Bensby et al. and do not produce an age distribution consistent with their results. In particular, our analysis finds that only 15 of 91 stars have ages younger than 7 Gyr, compared to their finding of 42 young stars in the same sample. While we do not find a constituency of very young stars, our results do suggest the presence of an ∼8 Gyr population at the highest metallicities, thus contributing to the long-standing debate about the age–metallicity distribution of the Galactic bulge. We supplement this with attempts at independent age determinations from two sources of photometry, BDBS and Gaia, but find that the imprecision of photometric measurements prevents reliable age and age uncertainty determinations. Lastly, we present age uncertainties derived using a first-order consideration of global modeling uncertainties in addition to standard observational uncertainties. The theoretical uncertainties are based on the known variance of free parameters in the 1D stellar evolution models used to generate isochrones, and when included, result in age uncertainties of 2–5 Gyr for this spectroscopically well-constrained sample. These error bars, which are roughly twice as large as typical literature values, constitute realistic lower limits on the true age uncertainties.
The Mass Fallback Rate of the Debris in Relativistic Stellar Tidal Disruption Events
Authors: Jankovič T. , Gomboc A. 
Published: March 2023

Abstract
Highly energetic stellar tidal disruption events (TDEs) provide a way to study black hole characteristics and their environment. We simulate TDEs with the Phantom code in a general relativistic and Newtonian description of a supermassive black hole’s gravity. Stars, which are placed in parabolic orbits with different β parameters, are constructed with the stellar evolution code MESA and therefore have realistic stellar density profiles. We study the mass fallback rate of the debris

M

̇

and its dependence on β, stellar mass, and age as well as the supermassive black hole’s spin and the choice of the gravity description. We calculate the peak value

M

̇

peak

, time to peak t
peak, duration of the super-Eddington phase t
Edd, time

t

>
0.5

M

̇

peak

during which

M

̇

>
0.5

M

̇

peak

, early rise-time τ
rise, and late-time slope n
∞. We recover the trends of

M

̇

peak

, t
peak, τ
rise, and n
∞ with β, stellar mass, and age which were obtained in previous studies. We find that t
Edd, at a fixed β, scales primarily with the stellar mass, while

t

>
0.5

M

̇

peak

scales with the compactness of stars. The effect of the SMBH’s rotation depends on the orientation of its rotational axis relative to the direction of the stellar motion in the initial orbit. Encounters in prograde orbits result in narrower

M

̇

curves with higher

M

̇

peak

, while the opposite occurs for retrograde orbits. We find that disruptions, at the same pericenter distance, are stronger in a relativistic tidal field than in a Newtonian one. Therefore, relativistic

M

̇

curves have higher

M

̇

peak

, and shorter t
peak and t
Edd.
IC 5146 Dark Streamer: The First Reliable Candidate of Edge Collapse, Hub-filament Systems, and Intertwined Sub-filaments
Authors: Dewangan L. K. , Bhadari N. K. , Men’shchikov A. , Chung E. J. , Devaraj R. , Lee C. W. , Maity A. K. , Baug T. 
Published: March 2023

Abstract
The paper presents an analysis of multiwavelength data of a nearby star-forming site, the IC 5146 dark streamer (d ∼ 600 pc), which has been treated as a single and long filament, fl. Two hub-filament systems (HFSs) are known to exist toward the eastern and the western ends of fl. Earlier published results favor simultaneous evidence of HFSs and end-dominated collapse (EDC) in fl. A Herschel column density map (resolution ∼13.″5) reveals two intertwined sub-filaments (i.e., fl-A and fl-B) toward fl, displaying a nearly double helix-like structure. This picture is also supported by the C18O(3–2) emission. The fray and fragment scenario may explain the origin of intertwined sub-filaments. In the direction of fl, two cloud components around 2 and 4 km s−1 are depicted using 13CO(1–0) and C18O(1–0) emission and are connected in velocity space. The HFSs are spatially found at the overlapping areas of these cloud components and can be explained by the cloud–cloud collision scenario. Nonthermal gas motion in fl with a larger Mach number is found. The magnetic field position angle measured from the filament’s long axis shows a linear trend along the filament. This signature is confirmed in the other nearby EDC filaments, presenting a more quantitative confirmation of the EDC scenario. Based on our observational outcomes, we witness multiple processes operational in the IC 5146 streamer. Overall, the streamer can be recognized as the first reliable candidate for edge collapse, HFSs, and intertwined sub-filaments.
Étude clinique de la dépression post-natale et des représentations maternelles du père de l’enfant chez des mères célibataires en Tunisie
Authors: Ahmouda Mariem , Bennabi-Bensekhar Malika , Wendland Jaqueline 
Published: March 2023

Cette étude s’est intéressée aux représentations maternelles du père de l’enfant et à la prévalence de la dépression post-natale (DPN) chez un échantillon de 30 mères célibataires tunisiennes. Pour l’étude de représentation maternelle, nous avons eu recours à l’entretien « R » durant le 3 e trimestre de grossesse des femmes. La dépression post-natale a été évaluée à travers des entretiens cliniques de type semi-directif, ainsi qu’avec la version tunisienne de l’EPDS, à la 1 ère semaine après l’accouchement (T1) et à la 6 e semaine après l’accouchement (T2). Les résultats de l’entretien « R » montrent que toutes les mères célibataires ont une représentation négative du père de l’enfant. Les résultats de l’EPDS montrent que 20 % des mères célibataires présentent une DPN. Nos résultats montrent l’importance de la prise en compte du facteur culturel dans l’étude de la maternité célibataire.
Les leaders travaillent-ils trop ?
Authors: Auger Claudine 
Published: March 2023

Les dirigeants travaillent beaucoup, souvent sans compter les heures. On dirige comme on est, mais comment assumer les nombreuses responsabilités et la charge exigeante qui incombent à ce rôle de leader sans y laisser sa peau ? Voici des pistes de réflexion pour trouver l’équilibre.
Música, mito e historia de El Dorado ¿Carlos Saura versus Werner Herzog ?
Authors: Bloch-Robin Marianne 
Published: March 2023

En este artículo analizamos el papel de la música en la película de Carlos Saura El Dorado (1987) a partir del estudio de la partitura arreglada por el compositor Alejandro Massó. Si bien en la concepción de su película basada en numerosas fuentes histórica, el director aragonés apuesta por oponerse a la obra de Werner Herzog Aguirre, Der Zorn Gottes (1972), también centrada en la aventura del hidalgo vasco Lope de Aguirre en busca de la ciudad mítica de El Dorado, la banda musical, de las que analizamos dos obras más particularmente – La Recercada (1553) de Diego Ortiz y un fragmento del preludio del tercer acto de Tristan und Isolde (1865) de Richard Wagner – contribuye a conferir a la película una dimensión mítica y universal que la desliga en cierta medida de la referencia histórica diegética y la aproxima a la obra de Herzog.
L’Arc de Triomphe et les Champs-Élysées comme signifiants politiques et littéraires : Une approche comparatiste des romans sur Mai 68
Authors: Clemente Escobar Ángel 
Published: March 2023

Les éléments urbains (rues, places, édifices, monuments) peuvent être compris comme les signifiants d'un discours social plus large. Le sens de ces éléments est déterminé aussi bien par leur cadre général que par leur morphologie et les événements qui s'y déroulent. Certains de ces éléments se comportent au niveau idéologique comme ces « signifiants flottants » nommés par le théoricien argentin Ernesto Laclau. Le sens de ces signifiants n'est pas complètement fixé, car il dépend de la forme discursive adoptée par les rapports de force d'une société donnée. De la même façon que les signifiants abstraits identifiant cette même société, les signifiants urbains sont particulièrement sensibles, en temps de crise, à la lutte entre les différents acteurs sociaux.Notre objectif est d’aborder les événements de Mai 68 à Paris dans la perspective de leur développement spatial et de l’affrontement discursif qui en découle, en nous concentrant sur l’une des parties les plus significatives de la ville, celle de l'Arc de triomphe et des Champs-Élysées. Nous illustrerons notre analyse par quelques représentations littéraires de ces événements, la création littéraire constituant une partie fondamentale de la réception de ce récit historique.
Dante et Pound pour Pasolini : La force révolutionnaire du passé
Authors: Passerone Giorgio 
Published: March 2023

À quoi sert l’événement-Pasolini à l’heure du marché mondial des « sociétés de contrôle » qu’avait annoncé son « sombre enthousiasme » devant l’homologation du néo-capitalisme italien des années 70 ? La nécessité de poser ce problème implique la tentative de ne pas renfermer Pasolini dans la réflexivité d’une exégèse qui finit trop souvent par ressasser « la structure intime du contraste interne, irrésolu », l’amphibologie et l’« oxymoron » de son œuvre et de sa vie. C’est « hors » de la reconnaissance de ses déterminations biographiques et textuelles, psychanalytiques et historiques, qu’il faut aller à la rencontre d’ une œuvre et d’une vie dans leurs résonances hérétiques, transhistoriques, avec Dante et Pound, également étrangers à eux-mêmes : nous pourrons en extraire l’expérimentation d’une commune force révolutionnaire qui innerve l’art(isant) d’un passé oublié à travers les luttes minoritaires d’aujourd’hui contre le marché universel pour le devenir d’un monde autre.
Histoire, littérature, fiction : à partir du cas Saviano
Authors: Boillet Étienne 
Published: March 2023

Certaines des idées exprimées par Manzoni, à propos des rapports entre l’histoire et le roman, peuvent trouver un écho chez des théoriciens de la fiction tels que Genette. C’est à partir de ce possible dialogue que nous abordons Gomorra de R. Saviano. L’auteur présente son livre comme une œuvre de non-fiction, genre dont il fait l’éloge en dénonçant l’ostracisme qu’aurait subi un roman comme De sang-froid de T. Capote (1966) et en se félicitant de la reconnaissance récente dont témoigne le prix Nobel 2015 attribué à S. Alexievicth. Mais ce discours tend aussi à effacer la frontière entre les récits strictement non fictionnels et les enquêtes romancées par l’ajout d’éléments inventés : il semblerait même que, pour l’auteur napolitain, ce soit justement cette part de fiction qui permette à l’enquête historique ou journalistique d’accéder à la littérarité et à une forme supérieure de vérité. C’est là un positionnement qu’on retrouve dans la critique, auprès de chercheurs qui, subordonnant en outre la question de la distinction entre fiction et non-fiction à l’enjeu de la modernité, voient dans Gomorral’expression emblématique d’un nouveau réalisme, avec lequel se tournerait enfin la page de la postmodernité. Nous examinons ici quelques aspects notionnels relatifs à ces questions, dans le cadre d’une interrogation plus large sur la frontière entre fiction et non-fiction.
Comparative Study of Postoperative Astigmatism Following Phacoemulsification with Scleral Incision and Posterior Chamber Foldable and Rigid (Nonfoldable) Intraocular Lens Implantation
Authors: Ambadkar Sweta , Thool Archana 
Published: March 2023

Purpose:
To study and compare the postoperative astigmatism following phacoemulsification with scleral incision and posterior chamber foldable and rigid (nonfoldable) intraocular lens (IOL) implantation.

Materials and Methods:
It was a hospital-based prospective observational study which included 200 eyes with presenile and senile cataract and were divided into two groups. Group I; included hundred cases with superior scleral incision (3.2 mm) phacoemulsification and foldable posterior chamber IOL (PCIOL) implantation. Group II; included 100 cases with superior scleral incision (5.5 mm) phacoemulsification and rigid (nonfoldable) PCIOL implantation. The data were analyzed by Chi-square test and P < 0.05 was considered statistically significant. The surgically induced astigmatism (SIA) at 6 weeks was compared between the two groups. SIA was calculated by the vector analysis.

Results:
The mean SIA in Group I was 0.67 ± 0.46 D, whereas in Group II was 1.17 ± 0.44 D. There was statistically significant difference between the two groups P < 0.05. Group II showed higher mean SIA than Group I at 6 weeks. Postoperatively, majority of patients developed against the rule astigmatism, 62% in Group I and 76% in Group II.

Conclusion:
SIA is less in 3.2 mm incision as compared to 5.5 mm incision with increase in against the rule astigmatism postoperatively.
Is “Lecture Capture System” a Blessing in Disguise for Teaching and Learning Anatomy?
Authors: Pandey Arvind Kumar , Kotian Sushma R. , Kalthur Sneha Guruprasad 
Published: March 2023

Background:
Lecturing is a commonly used teaching method for communicating conceptual knowledge in a large group. However, students' attention span is limited. The introduction of a lecture capture system would, therefore, be advantageous in filling this void.

Material and Methods:
The study was conducted on 202 first-year Medical Undergraduate students (96 males & 106 females). The students were exposed to 'Impartus,' i.e., a lecture capture system for four months. In the end, the usage & perception of the students regarding the lecture capture system was documented using a validated questionnaire.

Results:
Results were expressed in frequency & percentage. The usage of the lecture capture system helps in understanding the concepts better as agreed by 76.83% of the student population. The majority of the students watch the lectures online as per convenience (79.30%). About 55.44% stated that the lecture capture system is easy to use. Students (62.87%) believed that watching lectures online would help to recall the points that they had failed to understand in the class. However, 70.78% of students preferred face to face classroom lecturing system. Topics on Embryology & Neuroanatomy were strongly favored by a majority of the students (72.38%) to be viewed in Impartus.

Conclusion:
The lecture capture system is beneficial as it favors the teaching-learning process and can supplement traditional lecturing. Face to face lecturing is, however, preferred over online lectures. Issues such as poor internet connectivity and other technical glitches should be taken care of to promote better use of the lecture capture system.