bluuebunny/crossref_metadata_2025 huggingface dataset:
Secuelas del Impacto Psicosocial en tiempos de Pandemia
Authors: Carranco Soraya
Published: September 2022

El proyecto de investigación “Relaciones intrafamiliares de los moradores de los Barrios del Distrito Metropolitano de Quito en el contexto de la Pandemia COVID 19, en el periodo octubre 2020 a septiembre 2021” fue desarrollado a partir de que se evidenció que estar en casa no era y no es seguro para todos y todas. El proyecto de investigación tuvo como objetivo general el tema de Bioseguridad frente al COVID-19 con un enfoque de género en los barrios de Quito. Las preguntas realizadas en la encuesta trataban sobre el uso del triángulo de seguridad, mecanismo de protección y medidas de protección al regresar al hogar. Como conclusión las mujeres y hombres en su gran mayoría usan de medidas de seguridad que favorece a mantener controlado el virus. Otro aspecto importante a tomar en cuenta, es hablar de las relaciones intrafamiliares que se adaptan o relacionan con la salud y la educación; en cuanto a la primera, la pandemia por covid 19 ha generado varias problemáticas entre ellas el cierre de unidades educativas, el uso de las nuevas tecnologías y por supuesto la adaptación a las nuevas modalidades de estudio. En un intento de abordar la problemática y promover la resolución de algunos inconvenientes, cabe recalcar que se generaron nuevos problemas, el estrés, consecuencias en la salud mental, es por eso que a través de una investigación bibliográfica se ha dado una posible respuesta al ¿Por qué sucede esto? Y durante el desarrollo planeamos resolver esta incógnita, de la misma forma el hablar sobre los duelos por pérdidas familiares, y como estas influyeron en los moradores de los Barrios de Quito, considerando las dimensiones de educación y salud.
Marketing Digital: Aplicación de sus Herramientas y el cambio de Comportamiento de los Consumidores
Authors: Lavanda Reyes lor Angélica
Published: September 2022

Marketing Digital: Aplicación de sus Herramientas y el cambio de Comportamiento de los Consumidores
EVALUACIÓN DE LA ATENCIÓN DE ENFERMERÍA EN PACIENTES HABLANTES DE LENGUA ORIGINARIA
Authors: Bautista Vázquez Atanacia , Moreno Antonio Josefa , Parra Torres Nancy
Published: September 2022

El presente trabajo determina el nivel de atención de enfermería: la calidad, comunicación, discriminación y satisfacción en pacientes indígenas hablantes de lengua originaria Tutunakú, atendidos en consulta externa en el Hospital de Ixtepec, ubicado en la Sierra Nororiental del Estado de Puebla. Se analizó a una población constituida de 481 personas de las cuales se seleccionó una muestra de 175 usuarios que asistieron a consulta externa. Los resultados muestran que los usuarios atendidos en el servicio de consulta externa tienen un alto grado de insatisfacción al momento de demandar el servicio. La señalización dentro del hospital y la información brindada por el personal es calificada como mala, ya que la mayoría de los usuarios no saben leer y el personal de salud no habla la lengua originaria. Los horarios de atención respecto a los programados no se cumplen, por lo que el tiempo de espera por los usuarios se extiende. El trato del personal, es impaciente, poco amable e irrespetuoso, así como impaciente y con poca disposición. La falta de comunicación por la barrera lingüística dificulta la relación entre el personal de salud y paciente, impidiendo que se respetara su turno para la atención, además algunos usuarios se sintieron discriminados debido al tipo de vestimenta que portaban. Por lo que es necesario formar personal de salud bilingüe para poder atender a las poblaciones hablantes de lengua originaria.
VINCULACIÓN COMUNITARIA VIRTUAL COMO ESTRATEGIA PEDAGÓGICA, EN LA UNIVERSIDAD INTERCULTURAL DEL ESTADO DE PUEBLA
Authors: Martínez Rodríguez Ixcaxochitl , Techalotzi Amador Abigail
Published: September 2022

La contingencia sanitaria, que surge por la pandemia, ocasionada por el COVID-19 y declarada por la Organización Mundial de la Salud (OMS), modifico la educación universitaria presencial a una modalidad no presencial, situación que originó la necesidad de realizar una vinculación comunitaria virtual, volviéndose una estrategia pedagógica, para la apropiación de conocimientos en los(as) estudiantes de la universidad intercultural del estado de Puebla, además de cubrir la necesidad de ahondar más en la problemática social de atropello a los derechos humanos, propiciando el pensamiento crítico y un proceso reflexivo, en los(as) estudiantes, al fungir como actores sociales y visibilizar la asimetría social y la discriminación cultural. El enfoque metodológico utilizado fue el cualitativo, en el diseño de la investigación se empleó el método de investigación acción participativa, además de utilizar las técnicas, de las entrevistas abiertas y los grupos de discusión. El recurso didáctico, que surgió fue la realización de videos, referentes a derechos humanos, que se exhibieron masivamente a través de la página oficial de facebook, de la universidad intercultural del estado de Puebla durante los días 17, 18 y 19 de mayo de 2021. Este proyecto de vinculación comunitaria virtual, potencializa y reivindica la identidad de los(as) estudiantes, mostrándoles(as) orgullosos(as) de su cultura y de su lengua.
FACTORES DE RIESGO Y RIESGO CARDIOVASCULAR EN ADULTOS INDÍGENAS TOTONACOS
Authors: Mendoza Catalán Geu , Parra-Torres Nancy , Almonte Becerril Maylin
Published: September 2022

Estudio de corte transversal realizado en cinco comunidades totonacas de la Sierra nororiental, donde se aplicó un instrumento de recolección de datos con el fin de evaluar el riesgo de la población mayor a 20 años para desarrollar enfermedad cardiovascular, a través de la calculadora Framingham Heart Study. Los resultados mostraron una participación de 493 personas, donde de acuerdo con los factores de riesgo cardiovascular, un tercio de la población eran mujeres mayores de 60 años, las cuales en su mayoría presentaban obesidad y presión sistólica mayor a 130 mmHg. Asimismo, el 10.4% de los participantes presentaron un riesgo cardiovascular elevado, donde la comunidad de Caxhuacan fue la de mayor riesgo. De este modo los resultados indican que, aunque el riesgo cardiovascular en la población totonaca de la sierra nororiental de Puebla es bajo; los hombres son quienes presentan mayor riesgo en comparación con las mujeres. Asimismo, se destaca que un tercio de la población presenta cifras elevadas de presión sistólica, obesidad y fueron mayores de 60 años. Para esta población, se requiere de modificación de estilos de vida para disminuir la obesidad y mantener un control adecuado de la presión arterial.
WILLINGNESS-TO-PAY FOR ENERGY-SAVING RETROFITS OF RESIDENTIAL BUILDINGS AND ITS INFLUENCING FACTORS: THE CASE OF THE PEARL RIVER DELTA, CHINA
Authors: Hongyang Li , Shuying Fang , Skitmore Martin , Talebian Nima
Published: September 2022

In the 21st Century, the construction industry regards green building as an important breakthrough to achieve sustainable development, and energy-saving retrofits of residential buildings has been conducted globally with China no exception. In order to better understand consumers’ attitudes and willingness-to-pay (WTP) for green retrofits and identify the shortcomings of the industry’s development, this study designs a retrofit scheme and organizes a questionnaire survey to collect feedback of responds from the Pearl River Delta, China regarding their WTP for energy-saving retrofits of residential buildings and their decision factors. The study identifies a retrofit cost of $517.92 and found that 94.29% of respondents had the intention of green reconstruction. The results of a Pearson correlation analysis and one-way ANOVA show the professional background of respondents and their WTP to be negatively correlated, while education level, perceived value, perceived behavior control, and feelings of the surrounding reference group are positively correlated with participants’ expected inputs. Of all the factors considered, the level of education and feelings of the surrounding reference group influence budget most significantly. The findings will help property developers and the government to design better marketing strategies and launch corresponding policies, thereby promoting the development of the green building industry.
A Deep and Wide Twilight Survey for Asteroids Interior to Earth and Venus
Authors: Sheppard Scott S. , Tholen David J. , Pokorný Petr , Micheli Marco , Dell’Antonio Ian , Fu Shenming , Trujillo Chadwick A. , Beaton Rachael , Carlsten Scott , Drlica-Wagner Alex , Martínez-Vázquez Clara , Mau Sidney , Santana-Ros Toni , Santana-Silva Luidhy , Sifón Cristóbal , Simha Sunil , Thirouin Audrey , Trilling David , Vivas A. Katherina , Zenteno Alfredo
Published: September 2022

We are conducting a survey using twilight time on the Dark Energy Camera with the Blanco 4 m telescope in Chile to look for objects interior to Earth’s and Venus’ orbits. To date we have discovered two rare Atira/Apohele asteroids, 2021 LJ4 and 2021 PH27, which have orbits completely interior to Earth’s orbit. We also discovered one new Apollo-type Near Earth Object (NEO) that crosses Earth’s orbit, 2022 AP7. Two of the discoveries have diameters ≳1 km. 2022 AP7 is likely the largest Potentially Hazardous Asteroid (PHA) discovered in about eight years. To date we have covered 624 square degrees of sky near to and interior to the orbit of Venus. The average images go to 21.3 mag in the r band, with the best images near 22nd mag. Our new discovery 2021 PH27 has the smallest semimajor axis known for an asteroid, 0.4617 au, and the largest general relativistic effects (53 arcsec/century) known for any body in the solar system. The survey has detected ∼15% of all known Atira NEOs. We put strong constraints on any stable population of Venus co-orbital resonance objects existing, as well as the Atira and Vatira asteroid classes. These interior asteroid populations are important to complete the census of asteroids near Earth, including some of the most likely Earth impactors that cannot easily be discovered in other surveys. Comparing the actual population of asteroids found interior to Earth and Venus with those predicted to exist by extrapolating from the known population exterior to Earth is important to better understand the origin, composition, and structure of the NEO population.
Implications for the Collisional Strength of Jupiter Trojans from the Eurybates Family
Authors: Marschall Raphael , Nesvorný David , Deienno Rogerio , Wong Ian , Levison Harold F. , Bottke William F.
Published: September 2022

In this work, we model the collisional evolution of the Jupiter Trojans and determine under which conditions the Eurybates-Queta system survives. We show that the collisional strength of the Jupiter Trojans and the age of the Eurybates family and by extension Queta are correlated. The collisional grinding of the Jupiter Trojan population over 4.5 Gy results in a size–frequency distribution (SFD) that remains largely unaltered at large sizes (>10 km) but is depleted at small sizes (10 m to 1 km). This results in a turnover in the SFD, the location of which depends on the collisional strength of the material. It is to be expected that the Trojan SFD bends between 1 and 10 km. Based on the SFD of the Eurybates family, we find that the family was likely the result of a catastrophic impact onto a 100 km rubble pile target. This corresponds to objects with a rather low collisional strength (10 times weaker than that of basaltic material studied in Benz & Asphaug). Assuming this weak strength, and an initial cumulative slope of the size–frequency distribution of 2.1 between diameters of 2 m and 100 km when the Trojans were captured, the existence of Queta, the satellite of Eurybates, implies an upper limit for the family age of 3.7 Gy. Alternatively, we demonstrate that an unconventional collisional strength with a minimum at 20 m is a plausible candidate to ensure the survival of Queta over the age of the solar system. Finally, we show how different collisional histories change the expected number of craters on the targets of the Lucy mission and that Lucy will be able to differentiate between them.
Inferring the Neutron Star Maximum Mass and Lower Mass Gap in Neutron Star–Black Hole Systems with Spin
Authors: Ye Christine , Fishbach Maya
Published: September 2022

Gravitational-wave (GW) detections of merging neutron star–black hole (NSBH) systems probe astrophysical neutron star (NS) and black hole (BH) mass distributions, especially at the transition between NS and BH masses. Of particular interest are the maximum NS mass, minimum BH mass, and potential mass gap between them. While previous GW population analyses assumed all NSs obey the same maximum mass, if rapidly spinning NSs exist, they can extend to larger maximum masses than nonspinning NSs. In fact, several authors have proposed that the ∼2.6 M
⊙ object in the event GW190814—either the most massive NS or least massive BH observed to date—is a rapidly spinning NS. We therefore infer the NSBH mass distribution jointly with the NS spin distribution, modeling the NS maximum mass as a function of spin. Using four LIGO–Virgo NSBH events including GW190814, if we assume that the NS spin distribution is uniformly distributed up to the maximum (breakup) spin, we infer the maximum nonspinning NS mass is

2.7

−
0.4

+
0.5

M

⊙

(90% credibility), while assuming only nonspinning NSs, the NS maximum mass must be >2.53 M
⊙ (90% credibility). The data support the mass gap’s existence, with a minimum BH mass at

5.4

−
1.0

+
0.7

M

⊙

. With future observations, under simplified assumptions, 150 NSBH events may constrain the maximum nonspinning NS mass to ±0.02 M
⊙, and we may even measure the relation between the NS spin and maximum mass entirely from GW data. If rapidly rotating NSs exist, their spins and masses must be modeled simultaneously to avoid biasing the NS maximum mass.
Statistical Mechanics of Collisionless Orbits. V. The Approach to Equilibrium for Idealized Self-gravitating Systems
Authors: Williams Liliya L. R. , Hjorth Jens
Published: September 2022

Self-gravitating Newtonian systems consisting of a very large number of particles have generally defied attempts to describe them using statistical mechanics. This is paradoxical since many astronomical systems, or simulations thereof, appear to have universal, equilibrium structures for which no physical basis exists. A decade ago we showed that extremizing the number of microstates with a given energy per unit mass, under the constraints of conserved total energy and mass, leads to the maximum entropy state,

n
(
E
)
∝
exp
(
−
β
(
E
−

Φ

0

)
)
−
1

, known as DARKexp. This differential energy distribution, and the resulting density structures, closely approximate those of dark matter halos with central cusps, ρ ∼ r
−1, and outer parts, ρ ∼ r
−4. Here we define a nonequilibrium functional, S

D
, which is maximized for DARKexp and increases monotonically during the evolution toward equilibrium of idealized collisionless systems of the extended spherical infall model. Systems that undergo more mixing more closely approach DARKexp.
Deconfusing Detections in Directly Imaged Multiplanet Systems*
Authors: Pogorelyuk Leonid , Fitzgerald Riley , Vlahakis Sophia , Morgan Rhonda , Cahoy Kerri
Published: September 2022

High-contrast images from future space-based telescopes may contain several planets from multiplanet systems and potentially a few planet-like speckles. When taken several months apart, the short-period planets and speckles will appear to move significantly, to the point that it might not be clear which point source (detection) in the image belongs to which object. In this work, we develop a tool, the deconfuser, to test quickly all the plausible partitions of detections by planets based on orbital mechanics. We then apply the deconfuser to a large set of simulated observations to estimate “confusion” rates, i.e., how often there are multiple distinct orbit combinations that describe the data well. We find that in the absence of missed and false detections, four observations are sufficient to avoid confusion, except for systems with high inclinations (above 75°). In future work, the deconfuser will be integrated into mission simulation tools, such as EXOSIMS, to assess the risk of confusion in missions such as the IR/O/UV large telescope recommended by the Astro2020 decadal survey.
The first record of the thomisid genus Ibana Benjamin, 2014 (Araneae, Thomisidae) from China, with the description of a new species
Authors: Liu Keke , Li Wenhui , Yao Yanbin , Li Congzheng , Li Shuqiang
Published: September 2022

The genus Ibana Benjamin, 2014 was established, based on the type species Ibana senagang Benjamin, 2014 from Borneo, Malaysia. No species of this genus has been recorded from China.

A new species of Ibana is described and illustrated, representing the first record of the genus for China. Ibana gan sp. n. differs from its congener by the yellowishbrown longitudinal band on the abdomen and the round, contiguous spermathecae. The distribution of the new species in Jiangxi Province is mapped.
Cardiogenic shock - novelty and emerging therapeutic concepts
Authors: Petrov I. , Stankov Z. , Vasilev S.
Published: September 2022

The cardiogenic shock is a state of low cardiac output, primarily due to cardiac dysfunction, which leads to severe organ hypoperfusion with tissue hypoxia and increased lactate levels. It presents a severe complication with a prevalence of around 15% of all forms of shock and 2-5% of the cardiogenic shock is a complications of acute heart failure. Despite the diverse etiology of the cardiogenic shock, up to 80% of the cases are due to acute myocardial infarction. The ischemia, leads to dysfunction of the myocardium cells, which causes a decline in the blood pressure and subsequent tissue hypoperfusion. The most important part is to start the treatment regime as soon as possible in the pre-shock stage. The treatment of refractory cardiogenic shock is complex, as it contains an intravenous therapy with inotropes/vasopressors and mechanical circulatory support (MCS). The MCS devices are supposed to reduce the workload of the heart and the oxygen need of the myocardial cells and in the same time to maintain an adequate coronary and systemic perfusion. There are different MCS devices like IABP, Impella, Tandem Heart, V-A ECMO. The aim of this review article is to present the new trends in the treatment approach to cardiogenic shock and to bring clarity in the treatment regimes, based on the latest studies and guidelines.
First record of Chilapata rain-pool frog Minervarya chilapata Ohler, Deuti, Grosjean, Paul, Ayyaswamy, Ahmed & Dutta, 2009 (Anura, Dicroglossidae) from Nepal
Authors: Gautam Bivek , Bhattarai Santosh
Published: September 2022

Chilapata rain-pool frog (Minervarya chilapata) was described in 2009 from the Chilapata Reserve Forest of West Bengal, India. Here, we report the occurrence of M. chilapata for the first time from Morang district, Nepal, based on acoustic and morphological characters such as the presence of a distinct white line in the upper lip, small size (snout-vent length 18 to 26 mm), pointed snout and presence of dorso-lateral black patch. The nearest record of Chilapata rain-pool frog in Nepal from Pathari-Kanepokhari forest, Morang district, Nepal is ca.182 km west of its type locality Chilapata Reserve Forest, Jalpaiguri district, West Bengal, India. We also report the occurrence of M. chilapata from Barandabhar Biological Corridor, Chitwan National Park, Nepal based on a photographic record. The International Union for Conservation of Nature (IUCN) has listed the species as Data Deficient. Therefore, this record from Nepal will add new presence data for future status assessment for the species.
L’école des loisirs, l’utopie au long cours
Authors: Imbault Agathe
Published: September 2022

Créée en 1965, L’école des loisirs s’est faite le héraut du plaisir de lire et de l’émancipation par la lecture. Par sa politique éditoriale exigeante, elle a donné ses lettres de noblesse à la littérature jeunesse, et par la mobilisation d’enseignants et de libraires, elle l’a faite entrer dans nombre de foyers. Aujourd’hui, son marché est soumis à une nouvelle guerre de l’attention à l’égard d’enfants sursollicités. L’école des loisirs répond aux nouveaux enjeux dans une approche au long cours et en assumant d’être à contre-courant.
A Lifespan Approach to Self-Determination Begins in Early Childhood with Support from Parents and Teachers
Authors: Palmer Susan B.
Published: September 2022

Certains aspects de la faculté d’autodétermination à l’âge adulte sont présents dès le début de la vie et intégrés dans les processus développementaux tels que le langage et les choix à faire dans l’environnement. Les actions complètement indépendantes concernent moins la petite enfance et sont plus pertinentes pour les jeunes et les adolescents qui se préparent à la vie d’adulte, mais les enfants peuvent bénéficier d’opportunités pour utiliser des éléments constitutifs de l’autodétermination tels que faire des choix, prendre des décisions simples et se fixer des objectifs avec le soutien structuré des adultes. Le présent article décrit les orientations théoriques de l’autodétermination et met en exergue les résultats de la recherche et les applications pratiques pour les enfants avec ou sans troubles du développement. Il est important que les professionnels, les familles, etc. manifestent un haut niveau d’attentes envers les enfants et mettent en valeur les aspects du comportement autodéterminé qui font naturellement partie de la petite enfance. Cet article présente également un modèle adapté d’une pratique fondée sur l’expérience dans l’éducation pour que les familles participent au fonctionnement autonome d’un enfant. Parents, professeurs et personnels auxiliaires ne doivent pas manquer de s’intéresser aux aspects développementaux d’un comportement autodéterminé qui commence précocement et qui se poursuit tout au long de la vie.
« Est-ce que je peux encore dire quelque chose ? » Regards croisés sur l’autodétermination de personnes âgées avec ou sans déficience intellectuelle
Authors: Geurts Hélène , Haelewyck Marie-Claire
Published: September 2022

Il est désormais usuel de vivre plus longtemps et de connaître des changements liés à l’avancée en âge. À cet égard, il apparaît que l’autodétermination serait menacée par cette période de vie et les caractéristiques susceptibles d’y être associées. En ce sens, la vieillesse réclame notamment une adaptation des structures d’accueil, mais aussi une évolution des pratiques professionnelles. Notre article présente deux études veillant à mieux comprendre le vécu subjectif de l’avancée en âge, en lien avec le processus d’autodétermination et ce, auprès d’une population présentant une déficience intellectuelle ou non. Le croisement des résultats montre l’hétérogénéité des expériences de la vieillesse qui ne peuvent se résumer à un inéluctable déclin. Est également mise en évidence la dialectique étroite établie entre les capacités personnelles et les aménagements déployés dans l’environnement. Aussi, si les limitations individuelles peuvent influer négativement sur l’autodétermination, l’impact des facteurs environnementaux est également souligné. Accompagner la vieillesse nécessite donc d’interroger le regard porté sur l’avancée en âge et la prise en considération de la pluralité des vécus de sorte à individualiser les pratiques en exergue, tout lieu de vie confondu.
Doctrine interarmées : mission impossible ?
Authors: Frias Sanchez Carlos Javier
Published: September 2022

La doctrine détermine la culture des différentes armées. Chaque doctrine est issue d’une « théorie de la victoire », d’une façon particulière de comprendre la guerre et de s’imposer à l’adversaire. Chacune des armées a une « théorie » différente et, par conséquent, leurs doctrines sont aussi différentes. Le contrôle des parcours professionnels des officiers par leurs armées d’origine est un élément de freinage de toute réforme interarmées. Les nouveaux espaces de confrontation (information, cyber, Espace) peuvent donner lieu à la parution de nouvelles armées spécialisées, que découleront de « théories de la victoire » aussi différentes. À la fin, le chef militaire interarmées doit connaître les autres armées, leurs possibilités, leurs limitations et leurs façons d’opérer pour être capable de choisir le bon outil pour chaque problème militaire.
Quel degré d’autonomie spatiale pour la France au sein de l’Europe sur l’échiquier international ?
Authors: Allain Emmanuel
Published: September 2022

Le monde vit aujourd’hui un véritable bouleversement dans le domaine spatial. Pour autant, l’infrastructure spatiale reste un « colosse aux pieds d’argile », avec des risques et des fragilités réels non maîtrisés au gré de l’évolution des menaces. Ainsi, pour garantir notre résilience et notre autonomie stratégique, pour faire face aux conflits possibles qui se préparent, sur terre et dans l’Espace, un nouvel élan est nécessaire : il s’agit de renforcer notre capacité à accéder à l’Espace, à voir, comprendre et agir dans, depuis et vers l’Espace. Cet article propose des pistes de réflexion pour renforcer encore le triptyque « autonomie-résilience-coopération » pour une meilleure maîtrise de l’Espace.
Au-delà d’ AUKUS : coordonner les effets stratégiques britanniques et français dans la région indo-pacifique
Authors: Cunniff Sean
Published: September 2022

Si l’affaire AUKUS a indubitablement posé des défis à la relation anglo-française, les questions urgentes dans la région indo-pacifique peuvent fournir un point de mire clair pour une future coopération plus étroite. Le Royaume-Uni et la France sont deux puissances européennes qui ont une perspective véritablement mondiale, des capacités et une portée diplomatique, économique et militaire équivalentes, et qui ont chacune un intérêt profond pour l’Indo-Pacifique. Dans ce contexte, une coordination plus étroite des effets stratégiques du Royaume-Uni et de la France dans la région peut constituer non seulement un moyen de mieux relever les défis de la région, mais aussi un moyen de renouveler et d’approfondir les relations bilatérales.
Aspirations managériales : Traduction et validation d’une échelle de mesure dans un contexte francophone
Authors: Belghiti-Mahut Sophia
Published: September 2022

Cette recherche a pour objet de valider, pour la première fois dans le contexte d’une étude empirique en France, une échelle qui mesure la volonté d’avancer appelée également aspirations managériales (Tharenou et Terry, 1994). Cette échelle est un nouvel outil qui mesure l’aspiration managériale définie comme l’étendue de la volonté qu’un individu a, de progresser dans sa carrière et atteindre un poste plus élevé dans la hiérarchie. Basée sur deux échantillons, composés respectivement de 299 et de 304 managers, la présente étude valide la formulation française de l’échelle initialement proposée en anglais, et reproduit aussi de façon satisfaisante les qualités psychométriques de l’échelle d’origine.
Destruction of solutions for class of wave $ p(x)- $bi-Laplace equation with nonlinear dissipation
Authors: Zennir Khaled , Beniani Abderrahmane , Bochra Belhadji , Alkhalifa Loay
Published: September 2022

An initial value problem is considered for the nonlinear dissipative wave equation containing the $ p(x) $-bi-Laplacian operator. For this problem, sufficient conditions for the blow-up with nonpositive initial energy of a generalized solution are obtained in finite time where a wide variety of techniques are used.
Existence of solutions for Caputo fractional iterative equations under several boundary value conditions
Authors: Li Cuiying , Wu Rui , Ma Ranzhuo
Published: September 2022

In this paper, we investigate the existence and uniqueness of solutions for nonlinear quadratic iterative equations in the sense of the Caputo fractional derivative with different boundary conditions. Under a one-sided-Lipschitz condition on the nonlinear term, the existence and uniqueness of a solution for the boundary value problems of Caputo fractional iterative equations with arbitrary order is demonstrated by applying the Leray-Schauder fixed point theorem and topological degree theory, where the solution for the case of fractional order greater than 1 is monotonic. Then, the existence and uniqueness of a solution for the period and integral boundary value problems of Caputo fractional quadratic iterative equations in $ R^N $ are also demonstrated. Furthermore, the well posedness of the control problem of a nonlinear iteration system with a disturbance is established by applying set-valued theory, and the existence of solutions for a neural network iterative system is guaranteed. As an application, an example is provided at the end.
Ventilación por convección entre patios en las casas tradicionales de la ciudad de Lima. La casa Riva-Agüero
Authors: Wieser Martin , Scaletti Adriana , Montoya Teresa , Villanueva Natalia , Cisneros Sebastián
Published: September 2022

Las casas-patio tradicionales de la ciudad de Lima fueron edificadas bajo una evidente influencia árabe, en lo constructivo, formal y estilístico. La similitud en el clima desértico litoral permitió la transferencia de algunas estrategias bioclimáticas, entre ellas una disposición particular con dos patios. La ubicación relativa, escala y acabados de dichos patios sugieren la intención de calentar el primero y más amplio, procurando mantener más fresco y húmedo el segundo, y con ello inducir la ventilación por convección de modo que el aire atraviese los ambientes principales. El estudio pretende identificar la presencia de dicha estrategia, para lo cual se realizó un monitoreo energético de la Casa Riva-Agüero en un día cálido y soleado de verano. Los resultados permitieron demostrar que sí se logra activar una ventilación por convección entre los patios, ayudando a mantener los niveles de temperatura al interior de los espacios principales dentro de rangos confortables.
Imagining Cooperation: Cold War Aesthetics for a Hot Planet
Authors: Kaneti Marina
Published: September 2022

What does cooperation between rival superpowers look like? Do global issues have the capacity to rise above the geopolitics of the day and trigger alignment between rival powers? This paper argues the Cold War joint space exploration program between the United States and USSR provides a lesson on the limits of cooperation. These limits, I suggest, are not only a matter of power preferences, institutional differences, material disincentives, or even a consequence of a tendency for free-riding. Rather, they are also the result of incompatible “common sense” perceptions. Cooperation, even if institutionally viable, as in the case of the joint space program, can be constrained due to a lack of popular endorsement and legitimacy. To develop the argument, I examine the aesthetics of cooperation rendered through widely circulated media images associated with space cooperation during the Cold War. I argue the Cold War imaginary can serve as both critique and inspiration for today’s attempts to legitimize cooperation on global issues such as climate change. It provides insights on the role of “common sense” perceptions and the ways in which they inform questions concerning universality, the role of affect, and the alure of competition.
Bomb Archive: The Marshall Islands as Cold War Film Set
Authors: Jurkonytė Ilona
Published: September 2022

This essay offers a decolonial analysis of the inaugural moment of the United States’ Cold War project—the nuclear weapon “testing” in oceanic environments. As an alternative to the usual framing of Pikinni Atoll as a site of the Cold War arms race that tends to invisibilize Marshallese experiences through a Cold War binary logic, this article invites the reader to focus on the Pikinni Atoll as a film set. It offers such an approach with the hope of reframing questions of justice and recognizing the worlds lost due to the production of US nuclear modernity.
Des influenceurs sous influence ?
Authors: Godefroy Joseph
Published: September 2022

De récents travaux en sociologie se sont intéressés à des espaces numériques permettant la mise en relation entre consommateurs et travailleurs. À l’écart de ces supports, le réseau social numérique Instagram, plateforme non marchande, voit certains de ses usagers mobilisés par des entreprises dans l’espoir de mettre leur visibilité à profit. L’analyse s’appuie sur une démarche ethnographique pour étudier la mobilisation économique d’amateurs investis dans une activité de loisir en ligne. En cela, cet article éclaire le processus par lequel les « influenceurs » d’Instagram apprennent et intériorisent les éléments nécessaires à leur marchandisation. À travers une étude de cas, cet article rend compte des séquences d’interactions au cours desquelles la fabrique du statut d’influenceur se forge.
Leadership Moderating the Impact of Personality Traits on Sales Performance
Authors: Mattar Dorine , El Khoury Rim , Bassil Pamela Youssef
Published: September 2022

This study aims to detect the impact of three personality traits on agents' sales performance. The moderating role of the unit manager's leadership style is highlighted too. MLQ-5X and Mini-IPIP questionnaires were distributed to 200 insurance sales agents in Lebanon. Using SEM, extraversion is found to be positively and significantly affecting sales performance whereas the neuroticism's impact is found to be negatively significant. Moreover, the transformational and the laissez-faire leadership styles are found to strengthen the positive relationship between extraversion and sales performance. Transactional leadership seemed to boost the negative relationship between neuroticism and sales performance. This study fills a gap in the literature and enriches it, specifically when it comes to the insurance industry in a Lebanese context.
Automated Knowledge Extraction of Liver Cysts From CT Images Using Modified Whale Optimization and Fuzzy C Means Clustering Algorithm
Authors: Kaur Ramanjot , Khehra Baljit Singh
Published: September 2022

In this study, the integrated modified whale optimization and modified fuzzy c-means clustering algorithm using morphological operations are developed and implemented for appropriate knowledge extraction of a cyst from computer tomography (CT) images of the liver to facilitate modern intelligent healthcare systems. The proposed approach plays an efficient role in diagnosing the liver cyst. To evaluate the efficiency, the outcomes of the proposed approach have been compared with the minimum cross entropy based modified whale optimization algorithm (MCE and MWOA), teaching-learning optimization algorithm based upon minimum cross entropy (MCE and TLBO), particle swarm intelligence algorithm (PSO), genetic algorithm (GA), differential evolution (DE) algorithm, and k-means clustering algorithm. For this, various parameters such as uniformity (U), mean structured similarity index (MSSIM), structured similarity index (SSIM), random index (RI), and peak signal-to-noise ratio (PSNR) have been considered. The experimental results show that the proposed approach is more efficient and accurate than others.
Integration and Open Access System Based on Semantic Technologies
Authors: García Ana María Fermoso , García Maria Isabel Manzano , Gallinas Roberto Berjón , Sánchez Montserrat Mateos , Gutiérrez María Encarnación Beato
Published: September 2022

The aim of this work is the development of an information system that, by integrating data from different sources and applying semantic technologies, makes it possible to publish and share with society the scientific production generated in the university environment, promoting its dissemination and thus contributing to the knowledge society, among others. In practice, this is the implementation of a CRIS (current research information system). This CRIS presents advanced features. On one hand it applies semantic technologies, providing a query service through a SPARQL Point, besides the reuse of shared data by exporting them in different formats. In this sense, it is also based on a European ontology or semantic standard such as CERIF, which facilitates its portability. On the other hand, CRIS also presents an alternative to the lack of a single data system by allowing data from different sources to be integrated and managed.
Experimental and Computational Investigation of Stacked Rotor Broadband Noise in Hover
Authors:   University of Texas Austin, Johnson Chloe ,   US Army Research Lab, Jacobellis George , Sirohi Jayant , Singh Rajneesh
Published: September 2022

Acoustic measurements of a 2m diameter stacked rotor in hover were taken. The stacked rotor was comprised of two sets of opposing blades, which had a variable angle, referred to as the index angle, between them. The periodic, or tonal noise, was filtered from the acoustic spectra, allowing for analysis of the separate contributions of tonal and broadband noise. Accompanying simulations were done of the same rotors and conditions using the Rotorcraft Comprehensive Analysis System (RCAS) with a viscous vortex particle method and PSU-WOPWOP with the Brooks, Pope, and Marcolini (BPM) method for predicting broadband noise. Broadband and tonal noise measured experimentally were shown to contribute similar magnitudes to the overall sound pressure level (SPL) both near and far away from the rotor. The broadband A-weighted SPL was larger than that of the tonal noise. The tonal noise of a stacked rotor with no axial spacing decreased by 9 dB as the azimuthal spacing increased from the smallest value (28.125◦) to 90◦due to the tonal noise drastically decreasing at specific multiples of the blade passage frequencies; a stacked rotor with axial spacing of 1.5 chords, however, exhibited smaller reduction in tonal noise as the azimuthal spacing approached 90◦. The simulations showed many of the same trends as the experimental measurements, however the higher harmonic tonal noise and the broadband noise were underpredicted by up to 30 dB and 15 dB, respectively.
Prediction of RACER's Lateral Rotor Noise Using the CONCERTO Chain
Authors:   ONERA, Reboul Gabriel ,   Airbus Helicopters, Guntzer Frédéric ,   German Aerospace Center (DLR), Bekemeyer Philip , Bailly Joëlle , Einarsson Gunnar , Rottmann Lukas
Published: September 2022

This paper is aimed to present a computational chain developed in the framework of the CleanSky 2 European CONCERTO project. This computational chain is devoted to the prediction of the noise emitted by the lateral rotors of the Airbus Helicopters’ RACER demonstrator using both fast prediction and high fidelity approaches. One of the main challenges addressed in this paper is the capacity to predict rapidly the aerodynamic and acoustic interaction effects due to the vicinity of the wings and the fuselage. From an aerodynamic point of view, it is proven by comparison with high-fidelity results that it can be achieved thanks to a free-wake code using velocity perturbation fields to properly take into account the wings wake viscosity effect and to solve issues linked to the rotational speed difference between the main rotor and the propellers. Comparisons with a Boundary Element Method code show also that a Kirchhoff approximation appears to be a good option to rapidly assess, at least in terms of tendencies, the impact of near solid surfaces on the noise radiation.
Axial Descent of Variable-Pitch Multirotor Configurations: An Experimental and Computational Study for Mars Deployment Applications
Authors:   California Institute of Technology, Veismann Marcel ,   NASA Ames Research Center, Conley Sarah ,   NASA JPL and California Institute of Technology, Delaune Jeff , Burdick Joel , Gharib Morteza , Wei Skylar , Young Larry , Izraelevitz Jacob
Published: September 2022

For future helicopter-only Mars missions, NASA-JPL has proposed a novel entry, descent, and landing technique, in which the rotorcraft is deployed from the aeroshell in mid-air before landing. However, this approach is likely to subject the rotorcraft to unfavorable vortex ring state aerodynamics during deployment. To address this, the performance of a variable-pitch multirotor in axial descent was investigated using two parallel approaches: an experimental free-flight wind tunnel campaign and analogous computational efforts utilizing the tool RotCFD. Results indicated significant mean thrust losses of up to 20% compared to hover conditions, as well as heavily amplified rotor thrust fluctuations and vehicle attitude oscillations with increasing descent rate. Meanwhile, discrepancies between computations and experiments were observed, primarily regarding the descent rates where maximum thrust losses occur. Additional studies performed within the computational environment indicated that the vehicle fuselage and rotor-rotor interactions have significant impacts on the rotor performance in descent.
Lichten Runner-Up Paper: Experimental and Computational Investigation of a UAV-Scale Cycloidal Rotor in Forward Flight
Authors:   Texas A&M University, Heimerl Joseph , Benedict Moble , Halder Atanu
Published: September 2022

This paper investigates the unsteady force production on a UAV scale cycloidal rotor blade undergoing forward flight motion via experiments in a water tunnel as well as an unsteady aerodynamic model and a computational fluid dynamics (CFD) model. While time-averaged forces can shed light on cycloidal rotor performance, it is important to be able to accurately measure and predict the time history of forces on the blade in order to understand the highly nonlinear and unsteady fluid dynamics on a cycloidal rotor blade resulting from high-amplitude blade pitch kinematics, unsteady flow curvature effects and complex inflow distribution. Towards this, the instantaneous radial and tangential forces on a cycloidal rotor blade were measured in a water tunnel using a custom-built test-rig over a range of Reynolds numbers (Re = 30,000 – 100,000) while varying the rotor rotational speed, flow speed, blade cyclic pitch amplitude and pitch offset. The advance ratio was varied from 0 to 0.44. An unsteady aerodynamic model of the cycloidal rotor was developed and systematically validated with instantaneous force data from the water tunnel experiments. Once validated, the analytical model is utilized to explain various trends observed during the experimental study. To further investigate the forward speed aerodynamics, a 2-D CFD solver tailored towards the unique kinematics of cycloidal rotor is utilized. It is observed that the lift generated by cycloidal rotor increases continuously up to ±45° pitch amplitude for a low Reynolds number (Re = 29,000). However, this monotonic increase in lift plateaus at a pitch amplitude of ±30° for high Reynolds number (Re = 87,000). Moreover, a significant asymmetry was observed in the forces generated between the frontal half and rear half of the cycloidal rotor because of the dynamic virtual camber effect. A cycloidal rotor needs a phase offset angle in the vicinity of 90° to produce both a positive lift and propulsive force in forward flight. Additionally, this propulsive force was observed to decrease with increasing advance ratio due to a reduced effective angle of attack at all points along the azimuth. Moreover, at higher advance ratios the rotor begins extracting power from the flow over a large region at the frontal half of the cycle.
Designing a High Speed Morphing Rotor Blade
Authors:   Raytheon Technologies, Kuczek Andrzej ,   Rensselaer Polytechnic Institute, Gandhi Farhan ,   US Army CCDC AvMC, Camp Daniel , Chaudhry Zaffir , Zhao Wenping
Published: September 2022

High speed rotorcraft experience regions of reverse flow over the inboard sections of blades. In these regions, because of the reverse flow, the rotor blade experiences high drag, large dynamic pitching moments, and the resulting significant vibrations. If the shape of the rotor can be changed “morphed” in the inboard section, a number of these adverse effects can be minimized. This paper outlines the approach to morphing the rotor blade to achieve two desired shapes suited for hover and forward flight. Different elements and associated risk reduction of the morphing system are discussed in details. A key element of a successful morphing structure is a flexible skin which can change shape and at the same time maintain rigidity and stiffness. The approach to achieving these conflicting goals through interleaved and off set layers of elastomers and composite sections, all co-cured in one step, is described. In addition an actuation approach and associated kinematics to achieve the shape change while minimizing actuation forces is also described. Assembly of the full-scale (in the chord-wise direction) prototype hardware of an 18% thick SC325218 airfoil is also included.
The physiography of the middle and lower Thelon Basin
Authors: Bird J B
Published: September 2022

Malgré l'accès assez facile de la région ouest de la baie d'Hudson, de vastes étendues demeurent encore inexplorées et inconnues. Depuis les premières expéditions et explorations dans le Keewatin, cette région fut
classée comme faisant partie du bouclier canadien et subdivisée seulement en deux sous-régions: les hautes terres de l'intérieur et le domaine littoral. Les frontières ne peuvent être tracées cependant, avec certitude, car on réalise davantage, aujourd'hui,
toute la complexité de l'évolution de la période glaciaire et post-glaciaire. Des études sur le terrain furent conduites, en 1948, par la Division de Géographie dans la région de Thelon, afin d'élucider la physiographie du Keewatin. On examina la géologie et
les effets physiographiques de la glaciation à l'époque Pléistocène. L'auteur rapporte que l'évidence du mouvement de la glace dans le bassin Thelon, appuie la théorie d'une calotte glaciaire centrée dans la baie d'Hudson; il développe cette théorie, en
référant aux traits glaciaires observés partout dans la région et à la modification du paysage par la glaciation. On enregistra les effets locaux du climat et, particulièrement, les effets du gel. D'après l'état actuel de la physiographie et de la topographie,
le bassin du moyen et du bas Thelon est divisé en cinq régions physiographiques dont chacun est décrite en détail.
The Strait of Canso in relation to the economy of Cape Breton
Authors: Camu P
Published: September 2022

La décision récente du gouvernement fédéral de construire, en coopération avec le gouvernement provincial de Nouvelle-Écosse, une chaussée à travers le détroit de Canso et de relier directement l'île du Cap-Breton
à la terre ferme, a attiré l'attention sur ce coin de pays. Le détroit est l'une des trois voies navigables qui relie le Golfe Saint Laurent à l'Atlantique. Le peuplement le long des rives s'est concentré dans les centres de transbordement de Mulgrave et de Port Hawkesbury,
reliés par deux services de traversiers, l'un pour les chemins de fer et l'autre pour les automobiles, camions et piétons. Le tonnage annuel des denrées, transportées par chemin de fer, s'élevait à plus de 2-3 millions de tonnes durant la période 1945-1950. De ce
total, 750,000 tonnes de ferraille, de produits alimentaires et de marchandises générales étaient acheminées vers l'est et plus de 1 · 6 million de tonnes d charbon, d'acier, de bois et de poisson en conserve, vers l'ouest. Plus de 90,000 véhicules traversèrent le
détroit en 1949, dont plusieurs milliers appartenaient à des touristes. Analysant ensuite chacune des activités économiques de l'île, on explique que l'agriculture ne ·suffit pas à nourrir la population, qu'il faut importer de grandes quantités de produits
alimentaires, que les expéditions de poisson frais et de bois se font surtout par mer et que les principaux produits transportés vers l'ouest sont le charbon et l'acier, le premier extrait des mines des environs de Sydney et le second venant des aciéries du même centre. En somme,
on peut dire qu'environ 40 pour cent du tonnage total des denrées produites, consommées ou en transit dans l'île, emprunte la voie ferrée et le détroit de Canso et que 60 pour cent dépend des communications directes par mer.