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Unterberger, André. "Une série génératrice des formes paraboliques de Maass". Comptes Rendus de l'Académie des Sciences - Series I - Mathematics 328, n.º 7 (abril de 1999): 563–68. http://dx.doi.org/10.1016/s0764-4442(99)80247-x.
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Vega, María, Luis Martí-Bonmatí, Joaquín Galant, Blanca Madariaga y Enrique Mollá. "Formas de presentación de las masas intraarticulares". Radiología 44, n.º 4 (enero de 2002): 147–53. http://dx.doi.org/10.1016/s0033-8338(02)77778-3.
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Bronto, Sutikno y Sri Mulyaningsih. "Gunung api maar di Semenanjung Muria". Indonesian Journal on Geoscience 2, n.º 1 (28 de marzo de 2007): 43–54. http://dx.doi.org/10.17014/ijog.2.1.43-54.
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http://dx.doi.org/10.17014/ijog.vol2no1.20074Three maars are well identifi ed in the Muria Peninsula, i.e. Bambang Maar, Gunungrowo Maar, and Gembong Maar. The maars were formed by monogenetic volcanic eruptions due to the interaction between heat source (magma), groundwater and calcareous basement rocks. This interaction is able to produce very high pressure of gas and steam causing phreatic explosions, followed by phreatomagmatic- or even magmatic explosions and ended by a lava extrusion. Satellite image analyses have recognized twelve circular features, comprising Bambang Maar, Gunungrowo Maar, and Gembaong Maar. Phisiographically, these maars are characterized by circular depressions which are surrounded by hills that are gently sloping down away from the crater or having a radier pattern morphology. Outcrops and drilling core in the circular areas that are considered as volcanic maars are lava fl ows, pyroclastic breccias, lapillistones, and tuffs, located far away from the eruption centres of Muria and Genuk Volcanoes. One of the circular features, i.e. Jepara Circular Feature, is also supported by negative anomaly (<30 mgal) showing a circular pattern. In the future, a maar volcano could possibly erupt depending on the tectonic reactivity in the region.
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Iwaniec, Henryk. "Character sums and small eigenvalues for Г0(p)". Glasgow Mathematical Journal 27 (octubre de 1985): 99–116. http://dx.doi.org/10.1017/s001708950000611x.
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Let Δ denote the Laplace operator acting on the space L2(Г/H) of automorphic functions with respect to a congruence group Г, square integrable over the fundamental domain F=Г/H. It is known that Δ has a point spectrumwith (Weyl's law)and it has a purely continuous spectrum on [¼,∞) of finite multiplicity equal to the number of inequivalent cusps. The eigenpacket of the continuous spectrum is formed by the Eisenstein series Ea(z, s) on s = ½+it where a ranges over inequivalent cusps. The eigenfunctions ui(z) with positive eigenvalues are Maass cusp forms.
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Li, Xian-Jin. "On the Trace of Hecke Operators for Maass Forms for Congruence Subgroups II". Forum Mathematicum 17, n.º 1 (1 de enero de 2005): 1–30. http://dx.doi.org/10.1515/form.2005.17.1.1.
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Moebius, Stephan. "Die Religionssoziologie von Marcel Mauss". Zeitschrift für Religionswissenschaft 19, n.º 1-2 (1 de julio de 2020): 86–147. http://dx.doi.org/10.1515/zfr-2011-0003.
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ZusammenfassungDie bislang vernachlässigte Bedeutung von Marcel Mauss für die Ursprünge und den weiteren Verlauf der Durkheim’schen Religionssoziologie stellt eine Rezeptionslücke auf dem Gebiet der Religionswissenschaft und -soziologie dar. Dabei sind die entsprechenden Texte von Mauss – wie etwa eine seiner ersten Rezensionen, in der er das Konzept des Sakralen entwickelt – nicht nur Vorarbeiten von Durkheims Die elementaren Formen des religiösen Lebens. Mit den Analysen des Sakralen, der Magie, der Analyse des jahreszeitlichen Wandels von Religiosität, der Opferriten, des Gebets und der Ausarbeitung des Begriffs des mana eröffnet Mauss auch neue Zugangsweisen und Erkenntnisse für gegenwärtige religionssoziologische und -wissenschaftliche Forschungen, die nicht in der Religionssoziologie Durkheims aufgehen. Der Beitrag diskutiert Mauss’ Vorreiterrolle für die Religionssoziologie der Durkheim-Schule und stellt seine zentralen religionssoziologischen Konzepte vor.
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Jara, Gonzalo. "La revuelta como fenómeno de masas: imagen, mito y telepatía". Revista de la Academia, n.º 33 (10 de agosto de 2022): 32–49. http://dx.doi.org/10.25074/0196318.33.1896.
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El siguiente trabajo es un análisis de la movilidad de las masas dentro del fenómeno de la revuelta, el cual se posiciona en un paradigma distinto al de la revolución. De esta manera, las formas de abarcar la revuelta son de una manera completamente distinta a la segunda. En el trabajo se analizarán la temporalidad, la utilidad de los partidos políticos, el sentimiento religioso que en ella subsiste, sus imágenes movilizadoras más significativas y una de las formas de violencia que dentro de ella se suscitan. Para estos objetivos se mantendrá en constante conversación con el texto Intifada. Una topología de la Revuelta de Rodrigo Karmy, debido a que este es una de las reflexiones actualmente más maduras y significativas sobre el tema.
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Bert, Jean-François. "Marcel Mauss et la notion de « civilisation »". Cahiers de recherche sociologique, n.º 47 (27 de junio de 2011): 123–42. http://dx.doi.org/10.7202/1004983ar.
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Cette étude examine les raisons de l’intervention maussienne dans le débat conceptuel qui secoue, au début des années 1920, la discipline anthropologique française et internationale concernant le remplacement du terme de « civilisation » par celui de « culture », tel que défini par l’école américaine d’anthropologie. Les différentes prises de position de Mauss en faveur du terme de civilisation, à la fois dans ses textes mais aussi dans ses enseignements à l’Institut d’ethnologie à partir de 1925, dessinent une direction de recherche pour ses « héritiers » directs, dont A. G. Haudricourt qui, après la mort de Mauss, continuera de s’intéresser aux différences entre mentalités mais aussi à l’observation des techniques, à la description des processus technologiques ou encore à l’analyse des processus d’évolution des « forces productives » en ouvrant l’ethnologie à d’autres disciplines dont l’histoire, la biologie, la botanique et, surtout, la linguistique.
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Ureta, Gabriel, Károly Németh, Felipe Aguilera y Rodrigo González. "Features That Favor the Prediction of the Emplacement Location of Maar Volcanoes: A Case Study in the Central Andes, Northern Chile". Geosciences 10, n.º 12 (21 de diciembre de 2020): 507. http://dx.doi.org/10.3390/geosciences10120507.
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Maar volcanoes are monogenetic landforms whose craters cut below the pre-eruptive surface and are surrounded by a tephra ring. Both the maar crater and the surrounding tephra rim deposits are typically formed due to magma–water explosive interactions. Northern Chile is located in the Central Volcanic Zone of the Andes where, in literature, 14 maars have been recognized as parasite (6) and individual (8) volcanoes. Amongst these individual maars, 3 of them, namely the Tilocálar Sur, Cerro Tujle, and Cerro Overo volcanoes, are not related to calderas and were emplaced <1 Ma ago by magmatic explosive-effusive and phreatomagmatic eruptions. Based on the evolution and control of the volcanic eruptive styles of these three maars, which have been determined in previous research through fieldwork, stratigraphic, morphometric, textural (density and vesicularity), petrographic, and geochemical analyses, a set of key features that favor a prediction of the emplacement location of maar volcanoes in Central Andes, northern Chile are proposed. The set of features that permit and favor the growth mechanisms for maar formations corresponds to (i) a compressive tectonic setting (e.g., ridge structures), (ii) groundwater recharge (e.g., snowmelt and seasonal rainfall), (iii) the lithological setting (e.g., layers of low permeability), (iv) the presence of aquifer and/or endorheic basins (e.g., lakes or salars), and (v) a period of stress relaxation that permits magma ascent to the surface in volcanically active areas. Considering these characteristics, it is possible to identify places where phreatomagmatic eruption can occur. If the magma ascent flux is lower than the groundwater flux, this can lead to a phreatomagmatic eruption because of groundwater coming into contact with the magma. These eruptive features evidence internal—and external—factors that play an essential role in the transition from explosive-effusive magmatic to phreatomagmatic volcanic eruption styles during the same eruptive period that is one of the biggest challenges in volcanic hazard evaluations. Although, in this contribution, a set of features that permit and favor the growth mechanisms for a prediction of the emplacement location of maars in northern Chile is proposed, these considerations could also be applied to identify potential locations in other parts of the world where magma–water interaction eruption could occur. Therefore, this approach could be useful in the prediction of hydromagmatic volcanic eruptions and, thus, in mitigating the impact of volcanic hazard for the inhabitants of the surrounding areas.
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Hrich, Najoua, Mohamed Lazaar y Mohamed Khaldi. "MAPSS: An Intelligent Architecture for the Pedagogical Support". International Journal of Emerging Technologies in Learning (iJET) 14, n.º 14 (24 de julio de 2019): 19. http://dx.doi.org/10.3991/ijet.v14i14.10362.
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The multi-agent systems (MAS) are a part of artificial intelligence (AI), they have emerged today in the development of major e-learning platforms. Their integration has given new impetus to learning environments by the possibility of integrating new parameters (psychological, pedagogical, ergonomic…) favoring a better adaptation to the learner. In addition, the multiagent approach offers the possibility to design flexible solutions based on a set of agents which are in continuous communication to accomplish the tasks entrusted to them.
In this paper, we propose a model of pedagogical support based on a coupling of ontology and multi-agent systems for a synergy of their forces and the important contribution they can make to improve the learning-teaching process.
Previous work has been the subject of theoretical foundation related to competency evaluation, and development of an ontology and an algorithm for evaluating competency. As a continuity, we present the design of Multiagent Pedagogical Support System (MaPSS) and the different scenarios of its utilization.
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Reali, Florencia. "Psicología de las masas y democratización digital de la información". Desde el Jardín de Freud, n.º 22 (8 de febrero de 2024): 243–52. http://dx.doi.org/10.15446/djf.n22.112850.
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La World Wide Web promete una vía hacia la democratización de la información. Sin embargo, si bien los medios online ofrecen espacios para la pluralidad y la diversidad de voces, las nuevas formas de difusión de noticias presentan riesgos: el colectivo tiende a constituirse en “cámaras de eco” donde los mensajes se refuerzan y distorsionan potenciando ideologías extremas de naturaleza totalitaria. Este artículo se pregunta por el goce del sujeto en el colectivo que crea y recibe noticias. Se visita “Psicología de las masas” de Freud y se revisan conceptos lacanianos sobre el riesgo de adoptar una lógica del todo fálico resonante con la promesa de armonía totalitaria en el contexto de la democratización digital.
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Gunawan, Iwan Prasetiyo, Brian Yuliarto, Azma Putra y Irianto. "Investigation on Minute Holes of Woven Fabrics for Wide-Band Micro-Perforated Sound Absorbers". Buildings 13, n.º 3 (2 de marzo de 2023): 663. http://dx.doi.org/10.3390/buildings13030663.
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Woven fabric perforation is helpful to be adopted to meet the microstructure requirement of a micro-perforated panel (MPP) absorber. Unlike conventional MPP, the woven fabric micro-perforations are formed by yarn in the x (weft) and y (warp)-directions. Hence, minute holes of the MPP with a diameter of 0.1–0.3 mm or a high perforation ratio are expected to be easily fabricated, while such a specification is difficult to realize on a solid surface, as found in some studies. The study presented here focuses on the use of minute holes in MPP absorbers by woven fabrics and discusses the minute hole properties of woven fabrics and their associated absorption characteristics. Theoretical results by Maa’s model are also used to validate resulting characteristics found from the experimental investigations. It is found that minute holes with around 0.10–0.20 mm diameter have been successfully fabricated by controlling weft yarn density. The woven fabrics are capable of producing half-absorption bandwidth of up to 5000 Hz (>3 octaves), while the peak of the absorption coefficient can be more than 0.8. In addition, varying hole diameter with the order of 10−2 mm can change the absorption behavior for both peak absorption and absorption bandwidth. Such behavior is confirmed by comparing the results with the theoretical model. This study also indicates that Maa’s model is still applicable for predicting absorption of MPP developed based on woven fabric material.
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Hillebrandt, Frank. "Totale soziale Tatschen als Formen der Praxis - Wie uns Marcel Mauss hilft, Sozialität neu zu verstehen." Soziologische Revue 35, n.º 3 (julio de 2012): 253–60. http://dx.doi.org/10.1524/srsr.2012.0030.
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Fouce Rodríguez, Héctor. "Ulises en la redacción. Indicios, periodismo y cultura de masas". CIC. Cuadernos de Información y Comunicación 25 (5 de junio de 2020): 77–94. http://dx.doi.org/10.5209/ciyc.69714.
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Este artículo propone analizar el periodismo como una forma de conocimiento ligada al desciframiento de indicios y al establecimiento de hipótesis que guien la investigación a través del proceso inferencial. Se recupera la idea de que existe una inteligencia p´ráctica basada en la inferencia y la anticipación que los griegos llamaron metis y que marcó tanto los inicios de la medicina como de la retórica. También se establecen las conexiones entre estas formas antiguas de descriframiento de los signos y los conceptos de índice y de abducción en la semiótica de Peirce, analizando el lugar que el hábito, la duda y la creencia tienen a la hora de orientar las inferencias. Finalmente, se ponen en acción estos conceptos mediante el análisis de las investigaciones periodísticas sobre los abusos sexuales del clero católico en Boston, relatadas en la película Spotlight, de Tom McCarthy.
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Jaimes Cienfuegos, Javier. "La consolidación de las masas, ideología y ética en Freud". Religación. Revista de Ciencias Sociales y Humanidades 6, n.º 29 (28 de agosto de 2021): e210812. http://dx.doi.org/10.46652/rgn.v6i29.812.
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El significado que implica el concepto de hombre en el siglo XX, al igual que las nuevas formas de sublimación que se estructuraron en la sociedad tecno-científica que trajo consigo sujetos sin oposición, sin crítica y ética, requirió del análisis del concepto de masas a través de la obra de Freud y por medio de esta indagación, se da a conocer el significado que implica el concepto de hombre en el siglo XX. Finalmente se definió la represión (término central del presente estudio) a partir de un análisis teórico, que dará paso al estudio freudiano de las sociedades y a la transformación dialéctica del hombre, El diseño de la investigación corresponde al denominado transaccional descriptivo no experimental. Es de carácter documental, debido a que pretende puntualizar a través de la consulta de textos y el análisis de los mismos. Respecto al psicoanálisis, es imperante mencionar que ciertas situaciones pueden partir de mecanismos de defensa como la proyección o la sublimación, esto en el caso de las personas con deseos de reprimir o ser reprimidas por una autoridad (la iglesia o el ejército).
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Lavolpe, Francisco. "Comunicación de masas y estrategia política. Neuro motivaciones y comportamiento de los electores". Journal de Ciencias Sociales 1, n.º 20 (29 de abril de 2023): 105–7. http://dx.doi.org/10.18682/jcs.v1i20.9466.
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Con este libro, Andrés Valdez Zepeda se introduce al amplio y diverso panorama de las motivaciones y comportamientos de las personas en el marco de las estrategias electorales vinculadas a los sistemas de representación política. Entre sus revelaciones, se plantea el dilema que actualmente enfrentan los regímenes democráticos; su vigencia y su legitimidad. Aborda las técnicas y estrategias de frontera usadas en la actualidad por la clase política en la comunicación de masas. Además, se presentan investigaciones de alto rigor académico que dan cuenta de las formas más efectivas para poder lograr la conexión emocional con la masa y poder tocar sus fibras más sensibles.
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Perelson, Simone y Isabel Fortes. "INDAGAÇÕES SOBRE AS NOVAS FORMAS DE FABRICAÇÃO DO HUMANO À LUZ DA NOÇÃO DE DÁDIVA DE MARCEL MAUSS". Ágora: Estudos em Teoria Psicanalítica 18, n.º 1 (junio de 2015): 69–84. http://dx.doi.org/10.1590/s1516-14982015000100006.
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Buscaremos articular a lógica implicada nas doações de material de engendramento (sêmen, óvulos e embriões), praticadas no campo das novas tecnologias reprodutivas (NTR), com o sistema de trocas de algumas sociedades arcaicas, descrito por Marcel Mauss em seu célebre artigo Ensaio sobre a dádiva(1924/1974). Esta articulação será também trabalhada a partir de três importantes intérpretes deste ensaio - Lévi-Strauss, Maurice Godelier e George Bataille -, de modo a extrair dela algumas consequências e explicitar alguns questionamentos que as NTR colocam para a psicanálise e vice-versa.
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Helena Pereira, Maria, Luiz de Castro y Ricardo Michel. "Investigating Molecular Masses Formed during the Heat Treatment of Petroleum Pitches by Mass Spectrometry". Chemistry & Chemical Technology 7, n.º 2 (10 de junio de 2013): 131–39. http://dx.doi.org/10.23939/chcht07.02.131.
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Galeano, Juan Martín. "Émile Durkheim y Marcel Mauss en el debate entre sociología e historia". Theorein. Revista de Ciencias Sociales. 6, n.º 01 (24 de abril de 2022): 15–31. http://dx.doi.org/10.26807/theorein.v6i01.67.
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El artículo se pregunta por los aportes teóricos de Émile Durkheim y Marcel Mauss al debate sobre la relación entre la historia y la sociología en la sociología clásica, considerando el punto de vista de Durkheim y las modificaciones introducidas por Mauss a dicho criterio en tanto heredero y “continuador crítico” (Karsenti, 2011) del proyecto durkheimiano. Luego de señalar los elementos distintivos del método sociológico, a partir de una definición enciclopédica de la sociología elaborada por Paul Fauconnet y Mauss, en cuyo marco hay un momento específico reservado para la historia, se destacan las posiciones de Durkheim y Mauss. Se concluye que, aun cuando ambos plantean una distinción clara entre ambas disciplinas, en la perspectiva predominantemente evolucionista de Durkheim, la historia mantiene la condición de auxiliar para la sociología. Mientras, Mauss aboga por una sociología más permeable a las contingencias propias de la historia, que lo llevó a desarrollar análisis sobre asuntos como la guerra y la colonización de formas en las que no se había hecho antes bajo un marco teórico durkheimiano.
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Zhao, Bo, Debing Xu, Zhida Bai y Zhengquan Chen. "Hydro-Volcanism in the Longgang Volcanic Field, Northeast China: Insights from Topography, Stratigraphy, Granulometry and Microtexture of Xidadianzi Maar Volcano". Minerals 12, n.º 9 (31 de agosto de 2022): 1113. http://dx.doi.org/10.3390/min12091113.
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Hydro-volcanism in the Longgang volcanic field (LVF) of Northeast China has produced a dozen maars with features of complex sequences. To better understand the formation mechanism of maar volcanos in the LVF, this study focuses on the Xidadianzi (XDDZ) maar volcano, located in the Jinchuan valley of the LVF. Based on detailed stratigraphy analysis, 14C geochronology, grain-size distribution, and scanning electron microscopy (SEM) analysis, the eruptive sequence of the XDDZ volcano, including the South Crater and the North Crater, was constructed. The whole sequence was formed after four eruptive phases, including a wet phreatomagmatic eruption, an explosive magmatic eruption, a dry and hot phreatomagmatic eruption, and a small explosive magmatic eruption. 14C geochronology indicates that the formation age of XDDZ is 15,900 ± 70 years, BP. Topographic and stratigraphic characteristics show that the landforms of two craters were damaged and buried because of the destruction of lava flows and agricultural modification. The NE- trending fissure in the hard rock area is thought to participate in the formation of the XDDZ maar volcano.
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Lasyoud, Alhashmi Aboubaker, Jim Haslam y Robin Roslender. "Management accounting change in developing countries: evidence from Libya". Asian Review of Accounting 26, n.º 3 (10 de septiembre de 2018): 278–313. http://dx.doi.org/10.1108/ara-03-2017-0057.
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Purpose The purpose of this paper is to investigate the change in management accounting and control systems (MACSs) within two large public manufacturing companies in Libya so-called Trucks and Buses Company (TBC) and National Trailers Company (NTC). Design/methodology/approach The paper is based on semi-structured interviews, an analysis of documents and observations. It draws on New Institutional Sociology (NIS) perspective (DiMaggio and Powell’s 1983) as theoretical framework to provide explanations regarding how the MACS in the two companies were shaped by various factors. Findings The main factors identified in shaping the operations of the MACS were the need to comply with the political pressures, the Libyan Government’s laws and regulations, the instructions imposed by the management committee in both companies, leading organizations’ pressures (ISO), customer satisfaction (coercive isomorphism), the influence of professional associations (normative isomorphism) and the need to imitate efficient organizations in order to be more legitimate and successful (mimetic isomorphism). Research limitations/implications The findings of the study have implications for understanding the operations of MACS in developing countries. Future research could focus on alternative theoretical perspectives for the investigation of the process of change in MACS such as structuration theory, agency theory and actor-network theory. Originality/value The proposed theoretical framework provides insights into the process of change by focusing on the interplay between the institutional forces, market forces and intra – organizational power relationships to overcome the criticism of NIS that it downplays the role of market forces and intra – organizational power relations.
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Cifuentes Sarmiento, José Alejandro y Lorena Beatriz Elisa Guerrero Mojica. "Las juventudes comunistas en Colombia, 1930-1949: entre el frente popular y el frente de masas". Revista Mundos do Trabalho 16 (19 de diciembre de 2024): 1–20. https://doi.org/10.5007/1984-9222.2024.e103604.
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La Juventud Comunista Colombiana (JUCO) es la organización juvenil del Partido Comunista Colombiano (PCC), y dentro de sus objetivos está el de organizar los sectores juveniles y formar los futuros liderazgos del Partido. Se cree que la JUCO, con sus formas y objetivos actuales, fue fundada en 1932, apenas dos años después de la creación del PCC. Sin embargo, la JUCO comenzó a formarse hasta finales de la década de 1940 y tomó su forma organizativa actual a lo largo de la década de 1950. Pero esto no quiere decir que durante sus primeros años el PCC no hubiese contado con alguna organización juvenil. Entre los años treinta y cuarenta aparecieron varias organizaciones de jóvenes comunistas predecesoras de la JUCO, aunque el grueso de estas no fueron concebidas como una organización auxiliar del PCC, sino principalmente como un medio para poner en marcha la política de frente popular. La dirección partidaria mantuvo una posición ambigua frente al trabajo juvenil durante los primeros años del PCC, pues al interior de la organización no quedaba del todo clara la relación entre juventud y clase obrera, por lo que las tareas de organización del proletariado terminaban desplazando los esfuerzos organizativos de la juventud. Esto es comprensible si consideramos que durante este periodo Colombia era un país mayoritariamente rural y en el que el acceso a la educación estaba aún restringido a sectores de las élites sociales. El presente artículo se propone un estudio de las primeras organizaciones juveniles comunistas en Colombia a partir de una colección documental inédita, la cual nos ha permitido observar aspectos tempranos de la historia del PCC como los debates sobre su política de frente popular y las formas en que se implementó, o su caracterización de la sociedad colombiana en un periodo cambiante.
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Casas, Matías Emiliano. "La Asociación Folklórica Argentina: un “antídoto” para la cultura de masas a escala regional (1938-1942)". Sociohistórica, n.º 43 (15 de marzo de 2019): e074. http://dx.doi.org/10.24215/18521606e074.
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En mayo de 1937 se conformó la Asociación Folklórica Argentina (AFA) en la ciudad de Buenos Aires. La iniciativa de un grupo ecléctico de profesionales estuvo apuntalada y dirigida por el jurista Santo Faré. La novel agrupación se insertaba en un contexto de crecimiento para los estudios académicos centrados en lo folklórico y en una coyuntura de proliferación de asociaciones que reivindicaban el ámbito rural como núcleo de la identidad nacional. La intervención en una sociedad que entendían tergiversada por diversos factores se plasmó en diferentes iniciativas. La publicación de un boletín como órgano oficial durante cuatro años fue quizá la más perdurable en esos tiempos fundacionales. Este artículo analiza las formas en que la AFA pensó la promoción del folklore, la crítica a la sociedad contemporánea –centrada en los productos culturales circulantes–, y los modos de vincularse con asociaciones preexistentes –principalmente internacionales– a partir de las paginas de su boletín.
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Antunes Filho, E. "A Emoção Religiosa nos Estudos de Émile Durkheim e Marcel Mauss: A Propósito do Centenário de as Formas Elementares de Vida Religiosa". Estudos de Religião 26, n.º 42e (30 de junio de 2012): 137–55. http://dx.doi.org/10.15603/2176-1078/er.v26n42ep137-155.
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Calvo-Porral, Cristina, Valentín-Alejandro Martínez-Fernández y Oscar Juanatey-Boga. "La credibilidad de los medios de Comunicación de masas: una aproximación desde el Modelo de Marca Creíble". Intercom: Revista Brasileira de Ciências da Comunicação 37, n.º 2 (diciembre de 2014): 21–49. http://dx.doi.org/10.1590/1809-584420141.
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Este estudio tiene por objetivo investigar, en el entorno actual de los medios de Comunicación, la relación entre el valor de marca de los medios de Comunicación desde el enfoque del consumidor y su credibilidad, aplicando el Modelo de Marca Creíble para analizar cómo la audiencia elabora un juicio sobre la credibilidad de los medios. Los datos recogidos mediante un cuestionario estructurado sobre las percepciones de los consumidores, se analizaron mediante un modelo de ecuaciones estructurales. Nuestros resultados sugieren la existencia de una relación positiva entre el valor de marca de los medios de Comunicación y su credibilidad, mostrando que tanto la imagen o asociaciones, juntamente com la lealtad, ejercen la mayor influencia sobre el valor de los medios de Comunicación. Por tanto, la credibilidad de los medios de Comunicación implica una mejora de los procesos y de la propia imagen de éstos, así como el desarrollo de nuevas formas de tratamiento de las noticias y de las necesidades de información de la audiencia.
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Mosissa, Dereje. "Regeneration Status of Oxytenanthera abyssinica A. R. Munro Forest after Mass Flowering and Mass Death in Homosha District, Benishangul Gumuz Region, Northwest Ethiopia". Journal of Environmental Science and Allied Research 02, n.º 02 (11 de julio de 2019): 09–27. http://dx.doi.org/10.29199/2637-7063/esar-202022.
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Gerchunoff Silberberg, Santiago. "Los avatares de la identidad personal en la era digital. Conversación pública de masas y gesto identitario". Comunicación y Hombre, n.º 21 (24 de enero de 2025): 23–39. https://doi.org/10.32466/eufv-cyh.2025.21.872.23-39.
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En este estudio me pregunto por los efectos políticos que han tenido la aparición y el esparcimiento interminable de nuestros avatares digitales. ¿Qué consecuencias políticas trae la mutación de la presentación de nuestra identidad personal en la vida cotidiana encarnada en nuestros avatares digitales? En definitiva, ¿cuáles son las consecuencias políticas de la transformación digital de la esfera pública y el modo en el que nos mostramos en ella? Y, a su vez, ¿cuáles son las consecuencias de esta transformación tecnológica y política para la propia identidad personal de los ciudadanos, para su construcción y exposición? Para contestar a estas preguntas eludiendo el fatalismo que suele acompañarlas, planteo un rodeo por la historia de la esfera pública y sus transformaciones tecnológicas, así como de las formas políticas que correspondieron a esas transformaciones. Las teorías políticas de Hannah Arendt y Albert O. Hirschman resultan cruciales en mi recorrido para poder encontrar un sentido político al apogeo identitario propio de la nueva esfera pública posterior al advenimiento de internet. En el desarrollo pongo a trabajar dos conceptos propios que tienen una relación esencial: gesto identitario y conversación pública de masas.
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Ishikawa, Shin, Masa-aki Kohno, Chizuko Maeda, Kazuhide Ishii, Jun-ichi Shimomura y Kei-ichi Yoshioka. "Grain-Boundary Segregation of La and Zr in Alumina Scales Formed on Fe-20 mass%Cr-5 mass%Al Alloys". Journal of the Japan Institute of Metals 60, n.º 5 (1996): 463–68. http://dx.doi.org/10.2320/jinstmet1952.60.5_463.
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Lorber, Azriel. "A Space Propulsion System without Mass Ejection". Space Science Journal 1, n.º 2 (8 de julio de 2024): 01–10. http://dx.doi.org/10.33140/ssj.01.02.07.
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Flight performance of long-range spacecraft is limited by the need to lift large amounts of fuel into orbit; thus, a propulsion system which will not depend on mass- ejection will be a most welcome development. Various past proposals which attempted to achieve this were rejected because it was thought that they contradicted basic laws of physics. An experimental mechanical device which operates without mass-ejection, (or interaction with the environment), and which can serve as a spacecraft propulsion system, was constructed and successfully tested. It is based on manipulating centrifugal forces, internally generated by rotating masses, and is not size or scale dependent. Full explanation, with photos and movies of its construction and operation, is presented. When fully developed, this technology will enable constant long-duration acceleration of spacecraft (decreasing flight times), permit novel physics research, or enable hovering with or without the presence of atmosphere.
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Macedo Rodríguez, Alfonso. "Entre la cultura de masas y la alta cultura: Ricardo Piglia y La Argentina en pedazos". Revista Valenciana. Estudios de filosofía y letras, n.º 28 (8 de junio de 2021): 79–102. http://dx.doi.org/10.15174/rv.v13i28.526.
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Las relaciones que el escritor argentino Ricardo Piglia mantuvo con los medios de comunicación y la cultura de masas han sido parcialmente documentadas pero siempre han sido visibles: desde sus clases sobre la novela argentina y Borges en la televisión cultural, sus guiones de cine y su narrativa, en la que ha creado obras a caballo entre el género policial, la ciencia ficción y el fantástico, pasando por sus experimentos con diversas formas –como la novela gráfica y la historieta que aún siguen siendo consideradas extraliterarias–, ha abierto nuevos caminos de recepción de su obra y la de los autores de la tradición literaria que ha analizado en sus novelas, ensayos y notas de diario. Así, y a pesar de la complejidad que supone la lectura atenta de su narrativa, sus intervenciones en los circuitos masivos no hacen concesiones a un público no especializado con los estudios literarios pero al mismo tiempo lo acerca a la lectura de Borges, Leopoldo Marechal, Manuel Puig o Roberto Artl, por ejemplo. El presente artículo analiza la relación de Piglia con La Argentina en pedazos (1993), obra publicada de manera fragmentaria en la revista Fierro a partir de 1984, y se detiene, en particular, en las adaptaciones de algunas obras centrales de la literatura argentina: “El matadero” de Esteban Echeverría, “Las puertas del cielo” de Julio Cortázar y Los lanzallamas de Arlt. Los textos estudiados por Piglia para La Argentina en pedazos sugieren, indirectamente, una nueva revisión de la tradición literaria; simultáneamente, el encuentro entre dos manifestaciones culturales aparentemente antagónicas forma parte de una operación estética y política que fomenta la renovación artística y denuncia la violencia de Estado producida en la Argentina desde sus inicios como nación independiente.
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Lu, Diane, Barbara Strauss, Kristen Simkus, Martin Tepper, François Gagnon, Noémie Johnson, Eric Girard y Kirsten Barnes. "Événements indésirables à la suite d’une prophylaxie antibiotique de masse pendant une éclosion de streptocoque du groupe A à l’École de leadership et de recrues des Forces canadiennes". Relevé des maladies transmissibles au Canada 46, n.º 09 (3 de septiembre de 2020): 297–305. http://dx.doi.org/10.14745/ccdr.v46i09a03f.
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Lee, Hee-Jin y Deuk-Jin Park. "Analysis of Navigator Decision Making through Cognitive Science for the Presentation of a Collision-Avoidance Algorithm for MASSs". Journal of Marine Science and Engineering 10, n.º 10 (3 de octubre de 2022): 1420. http://dx.doi.org/10.3390/jmse10101420.
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The study of navigator behavior is important for the study of MASSs. This study analyzed navigator behavior through cognitive science, and it modeled the navigator decision-making process. Usually, the assessment of the collision risk for long-distance target ships is conducted through the distance (DCPA) and time (TCPA) to the closest point of approach. The navigator’s decision-making process is carried out quantitatively based on numerical values. Although the angle of the rudder is presented as a numerical value (i.e., 5°, 10°, 15°, and so on), it is expected that the navigator’s use of the rudder will depend on the conventional method rather than the quantitative one. Therefore, a scenario was constructed, and a simulation test was carried out through a ship-handling simulator. Our results confirmed that the rudder was used according to the conventional method. Moreover, the navigator decision-making process was analyzed through cognitive science. Cognitive science has revealed that human judgment is not logical, and that all decision making relies on memory. We identified the type of memory that affects the decision making of navigators: the DCPA and navigators’ decision-making-criteria values were mainly formed by episodic memory. A decision-making model for the relationship between the navigator’s episodic memory and the value of the DCPA was subsequently developed. This study took a scientific approach to analyze the process of the decision making of navigators, and an engineering approach to construct a decision-making model for application in MASSs.
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Ковалюк, О. "МЕТОД ПРИСКОРЕНОГО РОЗВАНТАЖЕННЯ МАЙНА ПРИ МАСОВИХ ПЕРЕВЕЗЕННЯХ ВІЙСЬКОВОЮ АВТОМОБІЛЬНОЮ ТЕХНІКОЮ". Collection of scientific works of Odesa Military Academy, n.º 20 (14 de diciembre de 2022): 162–71. http://dx.doi.org/10.37129/2313-7509.2023.20.162-171.
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This Article proposed a new accelerations methods supply load of broad nomenclature at the organize of mass transports. In the quality of еxperimental material may be used universal multilifts similar to transport sistems “Мultilift” on the baze trucks of general appointment GAZ-53-12, ZIL-157, ZIL-130-76, Ural-377N, ZIL-133GYA, КаmAZ-5320 and military cаrs of multypurpoze appointment GAZ-66, ZIL-131, Ural-375D, Ural-4320, КаmAZ-4310, КrAZ-260, КrAZ-5233, КrAZ-6322, MАZ-6317. The aim of this work is search alternаtive methods to increase the іntensifyty of аutomobile transports, degris time for search the ground of loading and get property, degris labour personnel at load of things, degris of losses and injure military property at overload. The difference of this project consist in the chance to selekt оptimal road and ivcrease еffectivity cargotraffic in Armed Forces of Ukraine. The practical considerable of word appear at increase volume of transport baggage for the provide exist AMТ Armed Forces of Ukraine without increase the guantity of automobile technic, possibility improve the net logistics supply in modern strugle, and digrease of work on military automobile technic. Keywords: baggage of broad nomenclature, the mass transport, universal “Мultilift”, military cаrs of multypurpoze appointment, losses of military baggage.
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Sharma, Richa y Aakanksha a. "MOVING FROM INFORMAL INTERACTION TO FOCUSED KNOWLEDGE SHARING AMONG USERS IN AN AGENT-BASED LEARNING ENVIRONMENT". International Journal of Advanced Research 11, n.º 11 (30 de noviembre de 2023): 1109–24. http://dx.doi.org/10.21474/ijar01/17917.
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Informal interaction among users may reveal significant information regarding their behaviors in smallcommunities. Although apps like WhatsApp are very popular for informal interaction activities, they, however, lack in providing the user with contextual information of other users present in the surroundings who might be helpful in addressing the queries thus enabling focused information exchange. Thus, there is a requirement of informal interactive environments that can be built on-the-fly, providing anytime-anywhere cost-effective interaction possibilities to the users. Mobile adhoc networks that can be built over wireless networks using wi-fi enabled smart phones, can provide a promising solution to the above problem, even in regions lacking adequate infrastructure. This paper proposes MAKSS, a mobile agent-based knowledge sharing system, comprising mobile user agents to facilitate information exchange among groups of users available in a close vicinity like a college campus. In this system, a user agent belongs to two views- a) a physical view formed by cellular frequency ranges of mobile devices b) a context view constituting a group of user agents having similar interests or contexts. These views help in dissemination of user queries and responses within a group (multicasting) or their routing to the intended persons (of same context as sender but belonging to different physical views). The simulated experiment highlights that the proposed system would work well in introducing users to the focused groups and also evaluates how user agents behave in the collaborative process of knowledge exchange on the parameters of inquisitiveness, responsiveness, reciprocity and cooperativeness.
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Eselevich, Viktor, Maxim Eselevich y Ivan Zimovets. "Possible difference in the formation of coronal mass ejections of two types". Solar-Terrestrial Physics 8, n.º 2 (30 de junio de 2022): 10–19. http://dx.doi.org/10.12737/stp-82202202.
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Analysis of seven near-limb coronal mass ejections (CMEs) has shown that at distances R<1.4R from the center of the Sun CMEs according to their formation can be divided into two types: type 1 CMEs and type 2 CMEs. In the case of type 1 CMEs, the frontal structure (FS) is formed by processes occurring in FS itself, which is the outer shell of the magnetic flux rope. As for type 2 CMEs, EP-CME, internal arched structures erupt, explosively expand, capture and accelerate the more distant arched structures, which merge to form the frontal structure of the type 2 CMEs.
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Valverde Zaragoza, Isabel. "La visita al salón: las exposiciones artísticas y la experiencia del cuerpo en los albores de la cultura de masas". Espacio Tiempo y Forma. Serie VII, Historia del Arte, n.º 9 (15 de octubre de 2021): 85–114. http://dx.doi.org/10.5944/etfvii.9.2021.30972.
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A lo largo del XIX, los Salones oficiales que se celebraban en París se convirtieron en acontecimientos masivos por el número de obras y de visitantes en proporciones difícilmente imaginables en la actualidad, constituyendo así una manifestación temprana de la cultura de masas. El formato de estas grandes exposiciones temporales, la especificidad de sus espacios, la forma de sociabilidad y de interacción a que daban lugar influían en la experiencia de los espectadores, que se distinguía de la que gozaban en el museo o la galería privada. A partir de ejemplos sacados de la crítica de arte, la literatura y la ilustración periodística, el artículo aborda el fenómeno del Salón como experiencia del cuerpo, tomando como punto de partida al espectador y su experiencia multisensorial propiciada no sólo por las obras que se muestran sino por las condiciones de percepción y juicio en las que se realiza la visita a la exposición. La experiencia de los Salones estaba mediada por prácticas sociales y modalidades de exhibición que producían diferentes formas de encuentro entre la obra y el cuerpo, y entre los cuerpos entre ellos. Las condiciones en la que se mostraba al público moderno la producción artística de su tiempo remiten a la constitución del «cuerpo sensorial» del espectador en constante negociación con toda clase de estímulos, no únicamente estéticos, como la multitud de los visitantes, el griterío y el ruido, el calor y la humedad envolventes, o el polvo.
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Németh, Károly. "Long-term erosion-rate calculation from the Waipiata Volcanic Field (New Zealand) based on erosion remnants of scoria cones, tuff rings and maars / Calcul de la vitesse d'érosion à long terme dans la zone volcanique de Waipiata (Nouvelle-Zélande) fondé sur les formes résiduelles de cônes de scories, d'anneaux de tuf et de maars". Géomorphologie : relief, processus, environnement 7, n.º 2 (2001): 137–52. http://dx.doi.org/10.3406/morfo.2001.1097.
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Jakhanov, Shakhrukh. "Legal basis of cooperation of mass media and self-government bodies of citizens in implementation of public control". Tsul legal report 4, n.º 2 (15 de junio de 2023): 7–10. http://dx.doi.org/10.51788/tsul.lr.4.2./kxnn5467.
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The article analyzes the legal basis of cooperation between mass media and citizens' self-government bodies in the implementation of public control. In the developed countries of the world, effective cooperation between civil society institutions and the state is very relevant as a form of cooperation that solves social and economic problems. In this regard, the effectiveness of the state power apparatus, formed with the help of democratic procedures, is related to the presence of public control over the activities of state bodies, which is carried out by civil society institutions. Today, public control is considered not as a means of pressure on the authorities but as a method of harmonious communication between civil society and the state and is one of the main factors that serve to eliminate social tension in society
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Ragin, Pavel Viacheslavovich. "Muon Mass Model - Theoretical Masses of Tau-Lepton, u- and d-quarks in Simplified Models - General Approach to Calculate Elementary Particle Masses". Annals of Computational Physics and Material Science 1, n.º 4 (6 de diciembre de 2024): 01–24. https://doi.org/10.33140/acpms.01.04.02.
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Numerical values of masses of elementary particles are one of the most fundamental and oldest unsolved problems (the Higgs mechanism does not explain them). In the model presented here for the first time, the theoretical mass of a “heavy electron”, muon, is calculated as 206.7 (±2.5) electron masses, which is 100.0% (±1.2%) of the experimental value of 206.7682827(46). The result is obtained through 100 iterations of the algorithm, which uses random numbers (from the π sequence) to represent the uncertainty of the coordinates of interacting muon substructures. Muon is considered a structure of interconnected nodes - identical deformable balls - and contains, in contrast to a single node as a 1storder structure (and a 1st generation particle, electron) - a layer of 12 nodes surrounding it, thus forming a 2nd-order structure, which also looks like a ball but on a smaller scale. The simplest attraction forces are modelled between the nodes, inversely proportional to the square of the distance, in equilibrium with repulsion forces arising from a relation analogous to the Heisenberg uncertainty formula. The energy-mass of the muon turns out to be equal to the total useful energy released during the structure’s formation - the collapse of 13 nodes initially separated at infinity. We finish with discussing the tauon’s, u- and d-quarks’ masses in simplified cases, showing the generality of our approach. Some implications for future theoretical work are also given.
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Eselevich, Viktor y Maxim Eselevich. "FEATURES OF THE INITIAL STAGE OF FORMATION OF FAST CORONAL MASS EJECTION ON FEBRUARY 25, 2014". Solar-Terrestrial Physics 6, n.º 3 (22 de septiembre de 2020): 3–15. http://dx.doi.org/10.12737/stp-63202001.
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We have analyzed the fast coronal mass ejection (CME) that occurred on February 25, 2014. The analysis is based on images taken in the 131, 211, 304, and 1700 Å UV channels of the SDO/AIA instrument and from observations obtained in the Hα line (6562.8 Å) with the telescopes of the Teide and Big Bear Observatories.
The February 25, 2014 CME is associated with the ejection and subsequent explosive expansion of the magnetic flux rope, which appeared near the solar surface presumably due to the tether-cutting magnetic reconnection.
The impulse of full pressure (thermal plus magnetic) resulting from such an “explosion” acts on the overlying coronal arcades, causing them to merge and form an accelerated moving frontal structure of the CME. This pressure impulse also generates a blast collisional shock wave ahead of the CME, whose velocity decreases rapidly with distance. At large distances R>7R₀ (R₀ is the solar radius) from the center of the Sun in front of the CME, a shock wave of another type is formed — a “piston” collisional shock wave whose velocity varies little with distance.
At R≥15R₀, there is a transition from a collisional to a collisionless shock wave.
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Václavík, L., J. Ovesná, L. Kučera, J. Hodek, K. Demnerová y J. Hajšlová. "Application of ultra-high performance liquid chromatography-mass spectrometry (UHPLC-MS) metabolomic fingerprinting to characterise GM and conventional maize varieties". Czech Journal of Food Sciences 31, No. 4 (19 de julio de 2013): 368–75. http://dx.doi.org/10.17221/177/2013-cjfs.
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The feasibility of metabolomic fingerprinting approach based on ultra-high performance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UHPLC-QTOFMS) was studied to assess its ability to discriminate between maize varieties, and to show the associations between them on the metabolomic level. The non-targeted metabolomic analysis was applied to assess the variability within two varieties grown under different environmental conditions and to characterise the association within a sample set comprising both conventional and transgenic (MON-ØØ81Ø-6) maize varieties cultivated under the same environmental conditions (locality). Typical metabolomic fingerprints were established for individual plants. The plants representing two varieties formed well separated clusters. Metabolomic fingerprints of the second sample set enabled their unambiguous discrimination. The differences in metabolomic fingerprints between maize varieties were identified and documented by grouping in PCA and/or CA. The results indicate a similar genetic basis of transgenic maize varieties as they descend from a MON 810 event. The results explicitly showed that the variability of the metabolites in MON 810 did not exceed the ranges measured within the conventional varieties, thus supporting the concept of substantial equivalence.
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SJ Aljabr, Khalid. "Frequency of Metabolic Syndrome According to Optimal CutPoints for Body Mass Index in Saudi Population". Diabetes & Obesity International Journal 3, n.º 3 (2018): 1–12. http://dx.doi.org/10.23880/doij-16000184.
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Background and Objective: The prevalence of metabolic syndrome (MetS) are increasing worldwide. Body mass index (BMI) cut-off for MetS can vary. The objective of this study is to identify the optimal BMI cut-off that is associated with MetS. Methods: For the present study, we analyzed participants who are equal to or older than 18 years old. A total of 5498 were analyzed at the present study. Patients were recruited from the population of the primary health care department at King Fahad Armed Forces Hospital. Metabolic risk factors were defined using the 2006 International Diabetes Federation criteria. We collected data personal interview and electronic medical chart review. Physician and nurse interviewers measured the weight (kg) and height (cm) of the participants and BMI was calculated. Receiver operating characteristic curve analysis was used to obtain the optimal sensitivity and specificity using different BMI cut-off values to predict the presence of diabetes. Results: Of the 5498 participants analyzed, 2049 (37.3%) were male and 3449 (62.7%) were female with female to male ratio 1.7:1. Age was 42.7 ± 15.8 (minimum 18 years and maximum 105 years). MetS was present in 1967 cases (35.8%) where 673 cases (38.8%) were male and 1204 cases (61.2%) were female with female to male ratio 1.6:1, P=0.08. Males were significantly older than females in MetS patients (45.5±12.8 vs. 36.1±13.3 respectively, p<0.0001). BMI was significantly higher in MetS patients (31.9±6.6 vs. 28.3±6.7 respectively, p<0.0001). Optimal BMI cut-off values ranged from 28.50 to 29.50 in total population, 27.50 to 28.50 in male and from 28.50 to 29.50 in female. The AUC was 0.615 (95% CI, 0.590-0.639) in male and 0.686 (95% CI, 0.668-0.704) in female. Regression analysis showed that the risk of MetS was significantly increased at BMI values as low as ≤15.0 kg/m2 and increased progressively as BMI increased for both genders. Applying this criterion to identify the cut-off values resulted in improvements in sensitivity, false negative rate and worsening in specificity and false positive rate. A very small false negative rate ranging from 0.001 to 0.005 resulted by using these lower BMI cut-offs. Conclusion: The diagnostic usefulness of BMI alone in defining obesity in patients with MetS is limited among men and women Saudi adults.
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Nakhutsrishvili, Irakli, Zurab Adamia y Lasha Loria. "Analisys of Kinetic Curves of Mass Change During the Interaction of Active Gases with Certain Metals and Compounds with Simultaneous Evaporation of the Product of Reaction". Journal of Applied Surface Science 2, n.º 2 (30 de diciembre de 2024): 01–05. https://doi.org/10.33140/jass.02.02.02.
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The influence of the secondary process of evaporation of the reaction product on the kinetics of interaction of gases (O2 , Cl2 , NH3 , H2 O and N2 H4 vapors) with the surface of some metals (Cr, Pb, Si, Ge) and compounds (BN, SiO2 , SiC) is discussed. Also is considered the case when the growth of the scale is preceded by the process of gas etching of the metal surface. A general equation is given that describes the scale growth-evaporation kinetic (sample mass change - time) curves during the interaction of gases with the surface of metals and compounds. Special cases of parabolic, cubic and fourth degree processes are discussed. The kinetics of nitridation of the surface of single-crystaline germanium by ammonia and hydrazine vapors was studied in detail. By evaporating the nitride formed on the germanium surface, a film of germanium oxyntride is deposited on a substrate located in the cold zone of the reactor.
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SJ Aljabri, Khalid. "Frequency of Prediabetes According to Optimal Cut-Points for Body Mass Index in Saudi Population". Diabetes & Obesity International Journal 3, n.º 3 (2018): 1–11. http://dx.doi.org/10.23880/doij-16000183.
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Background and Objective: The prevalence and incidence of prediabetes are increasing worldwide. Body mass index (BMI) cut-off for prediabetes can vary. The objective of this study is to identify the optimal BMI cut-off that is associated with prediabetes. Methods: For the present study, we analyzed participants who are equal to or older than 18 years old. A total of 5498 were selected to be enrolled for the present study. All patients were from the population of the primary health and diabetic Centers at King Fahad Armed Forces Hospital. Participants were defined as having prediabetes according to selfreport, clinical reports, use of antidiabetic agents and HbA1c (5.7-6.4). All data were collected by personal interview and on the basis of a review of electronic medical data. Weight (kg) and height (cm) were measured by physician and nurse interviewers and recorded. The optimal sensitivity and specificity using different BMI cut-off values to predict the presence of prediabetes were examined by receiver operating characteristic curve analysis. Results: Of the 5498 participants analyzed, 2049 (37.3%) were male and 3449 (62.7%) were female with female to male ratio 1.7:1. Age was 42.7 ± 15.8 (minimum 18 years and maximum 105 years ) and males were significantly older than females (45.3 ± 16.6 vs. 41.1 ± 15.1 respectively, p<0.0001). BMI was 29.6 ± 6.9Vwhere females had higher BMI than males (30.1 ± 7.5 vs. 28.8 ± 5.5 respectively, p<0.0001). Prediabetes was present in 579 (10.5%), 89 (15.4%) were male and 490 (84.6%) were female with female to male ratio 5.5:1. Diagnostic performance of BMI in detecting prediabetes using optimal BMI cut-off values based on the shortest distance in ROC curve showed BMI values ranged from 28.50 to 29.50 in total population, 27.50 to 28.50 in male and from 28.50 to 29.50 in female. The AUC was 0.560 (95% CI, 0.503- 0.617) in male and 0.517 (95% CI, 0.490-0.544) in female. The predictive value of BMI in detecting prediabetes using BMI cut-off values based on the lowest significant association between BMI and the risk factors from the logistic regression analysis showed that the risk of prediabetes was significantly increased at BMI values as low as 21 kg/m2 and has not been increased as BMI increased. Applying this criterion to identify the cut-off values resulted in improvements in sensitivity, false negative rate and worsening in specificity and false positive rate. Using these lower BMI cut-offs resulted in a very small false negative rate ranging from 0.07 to 0.09. A significant positive association for total population was observed with BMI values starting at 21 kg/m2 and non significant association with BMI values for both genders. Conclusion: The diagnostic usefulness of BMI alone in defining obesity as risk for prediabetes is limited among men and women Saudi adults.
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Lilleøren, Karianne S., Bernd Etzelmüller, Line Rouyet, Trond Eiken, Gaute Slinde y Christin Hilbich. "Transitional rock glaciers at sea level in northern Norway". Earth Surface Dynamics 10, n.º 5 (17 de octubre de 2022): 975–96. http://dx.doi.org/10.5194/esurf-10-975-2022.
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Abstract. Rock glaciers are geomorphological expressions of permafrost. Close to sea level in northernmost Norway, in the subarctic Nordkinn peninsula, we have observed several rock glaciers that appear to be active now or were active in the recent past. Active rock glaciers at this elevation have never before been described in Fennoscandia, and they are outside the climatic limits of present-day permafrost according to models. In this study, we have investigated whether or not these rock glaciers are active under the current climate situation. We made detailed geomorphological maps of three rock glacier areas in Nordkinn and investigated the regional ground dynamics using synthetic aperture radar interferometry (InSAR). One of the rock glaciers, namely the Ivarsfjorden rock glacier, was investigated in more detail by combining observations of vertical and horizontal changes from optical images acquired by airborne and terrestrial sensors and terrestrial laser scans (TLSs). The subsurface of the same rock glacier was investigated using a combination of electrical resistivity tomography (ERT) and refraction seismic tomography (RST). We also measured ground surface temperatures between 2016 and 2020, complemented by investigations using an infrared thermal camera, and a multi-decadal climatic analysis. We mapped the rock glaciers in the innermost parts of Store and Lille Skogfjorden as relict, while the more active ones are in the mouths of both fjords, fed by active talus in the upper slopes. Several of the rock glaciers cross over both the Younger Dryas shoreline (25 m a.s.l.) and the Early to Mid-Holocene shoreline at 13 m a.s.l. Both InSAR and optical remote sensing observations reveal low yearly movement rates (centimetres to millimetres per year). The ERT and RST suggest that there is no longer permafrost and ground ice in the rock glacier, while temperature observations on the front slope indicate freezing conditions also in summer. Based on the in situ temperature measurements and the interpolated regional temperature data, we show that the mean annual air temperature (MAAT) of the region has risen by 2 ∘C since the late 19th century to about 1.5 ∘C in the last decade. MAATs below 0 ∘C 100–150 years ago suggest that new rock glacier lobes may have formed at the end of the Little Ice Age (LIA). These combined results indicate that the Nordkinn rock glaciers are transitioning from active to relict stages. The study shows that transitional rock glaciers are still affected by creep, rock falls, snow avalanches, etc., and are not entirely dynamically dead features. Our contrasting results concerning permafrost presence and rock glacier activity show the importance of a multi-methodological approach when investigating slope processes in the edge zones of permafrost influence.
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Leshchenko, D. y T. Kozachenko. "PERTURBED MOTIONS OF A NEARLY DYNAMICALLY SPHERICAL RIGID BODY WITH A MOVABLE MASS SUBJECT TO CONSTANT BODY-FIXED TORQUE". Mechanics And Mathematical Methods 6, n.º 2 (30 de septiembre de 2024): 18–30. http://dx.doi.org/10.31650/2618-0650-2024-6-2-18-30.
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The problem of motion of a rigid body about a fixed point is one of the classical problems of mechanics. The interest to the problems of the rigid body dynamics has increased in the second half of the XX century in connection with the development of rocket and space technologies. A spacecraft or satellite, while orbiting about its center of mass, experiences torques from forces of diverse physical nature. This includes torques generated by the motion of internal masses, which can arise from factors such as presence of rotating components (like rotors or gyroscopes), and the activities of crew members aboard the crew vehicle. The dynamics of rigid body incorporated moving masses is a significant focal point in classical mechanics. Extensive research is dedicated to investigating the rotation of a rigid body featuring motion of internal masses. It is assumed that the body contains a viscoelastic element that is modeled by a moving mass connected to the body by a strong damper. The moving mass model loosely attached elements in a space vehicles, which can significantly affect the vehicle’s motion about its center of mass during a long period of time. Some cases are considered of the motion of a rigid body containing internal masses connected to the body by means of elastic and dissipative elements. A number of works are devoted to the analysis of various problems of the dynamics of space vehicles containing internal movable masses. The paper develops an approximate solution by means of averaging method to the system of Euler’s equation terms for a nearly dynamically spherical rigid body containing a viscoelastic element under the action of constant body-fixed torque. We obtained the system of motion equations in the standard form which refined in square-approximation by small parameter. Asymptotic approach permits to obtain some qualitative results and to describe evolution of angular motion using simplified averaged equations and numerical solution. The main objective of this paper is to extend the previous results for the problem of motion about a center of mass of a rigid body under the influence of small internal torque (cavity filled with a fluid of high viscosity) or external torque (resistive medium). The importance of the results is in progress of moving mass control motion of spinning projectiles.
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Motos, Ghislain, Julia Schmale, Joel C. Corbin, Rob L. Modini, Nadine Karlen, Michele Bertò, Urs Baltensperger y Martin Gysel-Beer. "Cloud droplet activation properties and scavenged fraction of black carbon in liquid-phase clouds at the high-alpine research station Jungfraujoch (3580 m a.s.l.)". Atmospheric Chemistry and Physics 19, n.º 6 (25 de marzo de 2019): 3833–55. http://dx.doi.org/10.5194/acp-19-3833-2019.
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Abstract. Liquid clouds form by condensation of water vapour on aerosol particles in the atmosphere. Even black carbon (BC) particles, which are known to be slightly hygroscopic, have been shown to readily form cloud droplets once they have acquired water-soluble coatings by atmospheric aging processes. Accurately simulating the life cycle of BC in the atmosphere, which strongly depends on the wet removal following droplet activation, has recently been identified as a key element for accurate prediction of the climate forcing of BC. Here, to assess BC activation in detail, we performed in situ measurements during cloud events at the Jungfraujoch high-altitude station in Switzerland in summer 2010 and 2016. Cloud droplet residual and interstitial (unactivated) particles as well as the total aerosol were selectively sampled using different inlets, followed by their physical characterization using scanning mobility particle sizers (SMPSs), multi-angle absorption photometers (MAAPs) and a single-particle soot photometer (SP2). By calculating cloud droplet activated fractions with these measurements, we determined the roles of various parameters on the droplet activation of BC. The half-rise threshold diameter for droplet activation (Dhalfcloud), i.e. the size above which aerosol particles formed cloud droplets, was inferred from the aerosol size distributions measured behind the different inlets. The effective peak supersaturation (SSpeak) of a cloud was derived from Dhalfcloud by comparing it to the supersaturation dependence of the threshold diameter for cloud condensation nuclei (CCN) activation measured by a CCN counter (CCNC). In this way, we showed that the mass-based scavenged fraction of BC strongly correlates with that of the entire aerosol population because SSpeak modulates the critical size for activation of either particle type. A total of 50 % of the BC-containing particles with a BC mass equivalent core diameter of 90 nm was activated in clouds with SSpeak≈0.21 %, increasing up to ∼80 % activated fraction at SSpeak≈0.50 %. On a single-particle basis, BC activation at a certain SSpeak is controlled by the BC core size and internally mixed coating, which increases overall particle size and hygroscopicity. However, the resulting effect on the population averaged and on the size-integrated BC scavenged fraction by mass is small for two reasons: first, acquisition of coatings only matters for small cores in clouds with low SSpeak; and, second, variations in BC core size distribution and mean coating thickness are limited in the lower free troposphere in summer. Finally, we tested the ability of a simplified theoretical model, which combines the κ-Köhler theory with the Zdanovskii–Stokes–Robinson (ZSR) mixing rule under the assumptions of spherical core–shell particle geometry and surface tension of pure water, to predict the droplet activation behaviour of BC-containing particles in real clouds. Predictions of BC activation constrained with SSpeak and measured BC-containing particle size and mixing state were compared with direct cloud observations. These predictions achieved closure with the measurements for the particle size ranges accessible to our instrumentation, that is, BC core diameters and total particle diameters of approximately 50 and 180 nm, respectively. This clearly indicates that such simplified theoretical models provide a sufficient description of BC activation in clouds, as previously shown for activation occurring in fog at lower supersaturation and also shown in laboratory experiments under controlled conditions. This further justifies application of such simplified theoretical approaches in regional and global simulations of BC activation in clouds, which include aerosol modules that explicitly simulate BC-containing particle size and mixing state.
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Uslular, Göksu, Gonca Gençalioğlu Kuşcu, Florence Bégué, Joël Ruch, Matteo Lupi, Oliver Higgins y Luca Caricchi. "New findings on compositionally distinct maar volcanoes: A case study from Acıgöl (Nevşehir) caldera (Central Anatolia, Turkey)". Frontiers in Earth Science 10 (3 de noviembre de 2022). http://dx.doi.org/10.3389/feart.2022.909951.
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Recent experiments have largely reshaped our knowledge of maar volcanism. A new evolutionary model promoting the role of explosion depth and vent migration during the formation of maars has provided an alternative approach to previous models. Despite a few attempts to test this model with real cases, there is still a need for field-based studies exploring the depositional characteristics of maars to better understand the factors affecting the model constraints. More investigations on less known felsic maars are required to elucidate the possible differences from their more common mafic counterparts. Here, we explore compositionally distinct monogenetic clusters within the Acıgöl caldera (NW of Central Anatolian Volcanic Province, CAVP), with four felsic maars (İnallı, Kalecitepe, Acıgöl, and Korudağ) and one mafic maar (İcik). Our field observations reveal a successive formation between rhyolitic maars and adjacent lava domes. The mugearitic İcik coalescent maar and the adjacent scoria cone are synchronously formed, which is disclosed by the intercalation of the maar and scoria cone deposits. The geochemistry of the maar juveniles suggests a parental basaltic magma source that has been possibly differentiated by varying degrees of fractional crystallization. Our findings identify the main factors in maar formation (i.e., optimum scaled depth-OSD, water-magma interaction, and basement lithology). We also determine some differences between the felsic and mafic maars in the region, such as higher juvenile content, less amount of sedimentary structure, and a clear transition from phreatomagmatic to magmatic explosions through the end of stratigraphy. All these reflect the complexity of maars, mainly formed by different depths of explosions that occurred in the shallowest few hundred meters rather than a systematic incremental decrease of the eruption locus. Further geophysical and geochronological studies will complete our proposed evolutionary model for the youngest monogenetic activity in the Acıgöl caldera that would also warrant volcanic hazard assessment due to the presence of low-velocity anomalies, shallow Curie depths, and prevalent geothermal activity.
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Fringant, Matthias. "Marcel Mauss, Émile Durkheim, De quelques formes primitives de classification". Lectures, 30 de junio de 2017. http://dx.doi.org/10.4000/lectures.23208.
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Conrey, J. Brian y Xian-Jin Li. "On the trace of Hecke operators for Maass forms for congruence subgroups". Forum Mathematicum 13, n.º 4 (17 de enero de 2001). http://dx.doi.org/10.1515/form.2001.017.
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