1,357,352 research outputs found
On the Gauss map of equivariant immersions in hyperbolic space
No full textGiven an oriented immersed hypersurface in hyperbolic space (Formula presented.), its Gauss map is defined with values in the space of oriented geodesics of (Formula presented.), which is endowed with a natural para-Kähler structure. In this paper, we address the question of whether an immersion (Formula presented.) of the universal cover of an (Formula presented.) -manifold (Formula presented.), equivariant for some group representation of (Formula presented.) in (Formula presented.), is the Gauss map of an equivariant immersion in (Formula presented.). We fully answer this question for immersions with principal curvatures in (Formula presented.) : while the only local obstructions are the conditions that (Formula presented.) is Lagrangian and Riemannian, the global obstruction is more subtle, and we provide two characterizations, the first in terms of the Maslov class, and the second (for (Formula presented.) compact) in terms of the action of the group of compactly supported Hamiltonian symplectomorphisms
A review on buckling and postbuckling of thin elastic beams
No full textThis paper provides a review of models and solutions for the buckling and postbuckling of beams available from the 50s of the last century to date. Beams with axially unrestrained (movable) ends and restrained (immovable) ends are covered. In each class, the formulation of the nonlinear buckling problem for the buckling loads and the postbuckling states is discussed and the underlying assumptions are highlighted. For relatively large-amplitude buckling of beams with movable ends, approximate analytical solutions up to the third order are presented and compared with the exact solutions expressed in terms of elliptic integrals. For beams with immovable ends, buckling involves midplane stretching that makes the nonlinear buckling problem takes the same form of the standard eigenvalue problem and, hence, exact solutions are affordable. This review combines the research outcomes on buckled beams from two scientific viewpoints: the structural dynamics and the nonlinear vibration viewpoints, respectively. Moreover, it presents in one place the formulation and the exact solutions for the buckling of beams to serve as an on-demand resource for researchers concerned with the buckling and postbuckling of beams
The Pullout Capacity of Polymeric Geogrids Embedded in Dune Sand-Tire Shred Mixture
No full textA Master of Science thesis in Civil Engineering by Youcef El Berizi entitled, “The Pullout Capacity of Polymeric Geogrids Embedded in Dune Sand-Tire Shred Mixture”, submitted in July 2025. Thesis advisor is Dr. Magdi El-Emam. Soft copy is available (Thesis, Completion Certificate, Approval Signatures, and AUS Archives Consent Form).College of EngineeringDepartment of Civil EngineeringMaster of Science in Civil Engineering (MSCE
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Tourism Carrying Capacity Assessment for Historical Sites - Isfahan Emam Mosque
No full textIsfahan as cultural capital of Islamic world is the most important tourism destination in Middle East and a profitable economic sector in Iran. Naghsh-E Jahan Square (Emam Square) was certified as a World Heritage Site in 1979. Among the tourist sites in Naghsh-E Jahan Square, Emam mosque is a place which attracts the largest number of visitors. The unplanned tourism activities, daily prayer and religious events in this site have been creating various physical and social concerns. If appropriate planning measurements are not derived from the consideration of the carrying capacities of this site, tourism center will be overloaded, tourism quality will be degraded and therefore the benefit obtained from tourism activities will be reduced. For the first time in the history of this site, in this paper, we demonstrate an applicable method which is used for calculating the physical carrying capacity for this historical mosque. Also the result of SWOT model analysis regarding opportunities and limitations on number of the tourists can be used as the preliminary benchmarks for later tourism planning of the Emam mosque
Adopting Geophysical Testing Techniques in Geotechnical Investigation and Shallow Foundation Design
No full textA Master of Science thesis in Civil Engineering by Mohammad Amer entitled, “Adopting Geophysical Testing Techniques in Geotechnical Investigation and Shallow Foundation Design”, submitted in Spring 2018. Thesis advisor is Dr. Magdi El-Emam. Soft and hard copy available.College of EngineeringDepartment of Civil EngineeringMaster of Science in Civil Engineering (MSCE
CDISC-SDTM sample study
No full textThis is a sample study dataset containing CDISC-SDTM formatted data files created originally by CDISC for demo purposes.
This dataset can be used by anyone who is interested in CDISC-SDTM formatted dataset. This version is used to demonstrate loading standard clinical datasets into PlatformTM: a data custodianship platform for translational research data.
Live demo here: https://platformtm.cloud/app/#/projects/15/mai
CDISC-SDTM sample study
No full textThis is a sample study dataset containing CDISC-SDTM formatted data files created originally by CDISC for demo purposes.
This dataset can be used by anyone who is interested in CDISC-SDTM formatted dataset. This version is used to demonstrate loading standard clinical datasets into PlatformTM: a data custodianship platform for translational research data.
Live demo here: https://platformtm.cloud/app/#/projects/15/mai
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Emotional Agen Modelig (EMAM)
No full textArtificial emotions play an important role at the control level of agent architectures: emotion may lead to reactive or deliberative behaviors, it may intensify an agent’s motivations, it can create new goals (and then sub-goals) and it can set new criteria for the selection of the methods and the plans the agent uses to satisfy its motives. Since artificial emotion is a process that operates at the control level of agent architecture, the behavior of the agent will improve if agent’s emotion process improves (El-Nasr, Ioerger, & Yen, 1998; El-Nasr & Yen, 1998). In this introductory chapter, our aim is to build agents with the mission "to bring life" several applications, such as: information, transaction, education, tutoring, business, entertainment and e-commerce. Therefore we want to develop artificial mechanisms that can play the role emotion plays in natural life. We call these mechanisms “artificial emotions” (Scheutz, 2004). As Damasio (1994) argues, emotions are necessary for problem solving because when we plan our lives, rather than examining every opinion, some possibilities are emotionally blocked off. We will try to investigate if artificial emotional control can improve performance of the agent in some circumstances. We would like to introduce the readers to our model, which is based on both symbolic and computational relations. Simulations are left for another publication. The space available is barely enough to give an overall picture about our model. The main contributions of this proposal model is to argue that emotion learning is a valid approach to improve the behavior of artificial agents, and to present a systematic view of the kinds of emotion learning that can take place, assuming emotion is a process involving assessment, emotion-signal generation, emotion-response and then emotion learning (LeDoux, 1996). To come across as emotional, an agent needs to incorporate a deeper model of personality, sensitivity, mood, feeling and emotions, and, in particular, directly connect these affective concepts. For agents to be believable, the minds of agents should not be restricted to model reasoning, intelligence and knowledge but also emotions, sensitivity, feeling, mood and personality (Nemani & Allan, 2001). We will propose EMAM (Emotional Agent Model) for this purpose. EMAM generates artificial emotion signals, evaluates and assesses events, takes into account the integration of personality, sensitivity, mood, feeling and motivational states then takes proper action or plans for actions (sequence of actions) (LeDoux, 1996; Gratch, 2000).</jats:p
Tratamiento de las unidades fraseológicas en la lexicografía bilingüe español-árabe y árabe-español
No full textLa presente tesi di dottorato ha come fulcro di interesse la situazione attuale della fraseologia nella lessicografia bilingue spagnolo-arabo e arabo-spagnolo e, per estensione, la storia dei dizionari bilingui in questa combinazione linguistica. Solo conoscendo le caratteristiche, lo sviluppo e l’evoluzione delle opere lessicografiche in questa combinazione linguistica potremo comprendere meglio i problemi che presenta oggi il trattamento degli elementi fraseologici nel dizionario bilingue spagnolo-arabo, correggere gli errori più comuni, comprendere l’importanza dei repertori precedenti e porci delle sfide per il futuro. Per realizzare questo studio, siamo partiti da una linea di ricerca plurale alla quale partecipano anche le informazioni rivelatrici fornite dalla tradizione lessicografica spagnolo-araba. In questo senso, la presente ricerca si articola sulla base di quattro obiettivi centrali. Il primo di questi risponde all’inevitabile legame tra passato e presente: lo scopo è di offrire una contestualizzazione storico-culturale e sociolinguistica dei compendi lessicografici del passato e dei cambiamenti di orientamento rispetto alla diacronia. Un secondo obiettivo mira, sulla base delle ricerche effettuate, a offrire una visione panoramica dei dizionari generali e specialistici che segnano la scena lessicografica del mondo arabofono e ispanofono nel XX e XXI secolo. Questo, a sua volta, fornisce una prova dei modelli dominanti nella pratica lessicografica ispano-araba e arabo-spagnola. Nella revisione di tutte queste opere, le descrizioni effettuate diventano un materiale interessante per raccontare la loro storia e per rendere conto della teoria o delle teorie che le sottendono, al fine di aprire nuove strade per migliorarne la qualità e l’adeguatezza rispetto alle carenze fondamentali di cui soffrono i materiali lessicali e fraseologici in queste opere. Un terzo obiettivo, parallelo e complementare, è quello di stabilire i confini della fraseologia in spagnolo e in arabo e le caratteristiche che ne determinano la classificazione e lo status linguistico. Questo ci permetterà, in un secondo momento, di adottare una dimensione teorica e metodologica del trattamento e della segmentazione dell’universo fraseologico prima di realizzare uno studio valutativo sulla presenza di unità fraseologiche nelle diverse strutture dei dizionari più importanti dell’attuale contesto lessicografico spagnolo-arabo. Il quarto e ultimo obiettivo, invece, è quello di analizzare quattro opere fondamentali della traiettoria lessicografica contemporanea spagnolo-arabo e arabospagnolo: il Diccionario avanzado árabe, Tomo II (español-árabe) (2010 [1970]) di Federico Corriente Córdoba e Ahmed Salem Ould Mohamed Baba, il Al-Muín. Diccionario español-árabe (2005 [1993]) di Yussof Mohamed Reda, il Diccionario Avanzado árabe: Tomo I: árabe-español (2005 [1991]) di Federico Corriente Córdoba e Ignacio Ferrando Frutos e il Diccionario de árabe culto moderno (árabe-español) (2004 [1996]) di Julio Cortés. Nonostante la popolarità di queste quattro opere, finora non erano stati realizzati studi descrittivi per la lessicografia bilingue tra spagnolo e arabo che trattassero in modo oggettivo e sistematico della fraseologia in questi repertori. Per rendere possibile la fase empirica della tesi, il modus operandi ha previsto la creazione, con l’aiuto di mezzi informatici, di un corpus rappresentativo di unità pluriverbali estratte dai dizionari menzionati che fosse in grado di immagazzinare e gestire tutte le informazioni in modo metodico. Per condizionare il meno possibile la ricerca e la raccolta delle unità pluriverbali nei dizionari in analisi, si è scelto di costruire quattro schede lessicografiche che comprendessero tutte le combinazioni che compaiono sotto la lettera A nella direzione spagnolo-arabo e sotto la lettera alif nella direzione arabo-spagnolo. Queste schede lessicografiche sono composte da diversi campi finalizzati alla valutazione formale e contenutistica di ogni unità fraseologica. L’obiettivo finale è quello di individuare da un punto di vista quantitativo e qualitativo un insieme di problemi comuni a tutti i dizionari studiati, al fine di costruire un punto di partenza per futuri lavori lessicografici e ricerche sulla lessicografia bilingue spagnolo-arabo e arabo-spagnolo.The present doctoral thesis tackles as a phenomenon of interest the approach to the current situation of phraseology in bilingual Spanish-Arabic and Arabic-Spanish lexicography and, by extension, to the history of bilingual dictionaries in this linguistic combination. Only by knowing the features, development and evolution of lexicographical works in the selected linguistic binomial can we better understand contemporary problems concerning the treatment of phraseological elements in the Spanish-Arabic bilingual dictionary, correct habitual errors, appreciate the importance of previous repertoires, and deal with future challenges. To carry out this study, we have started from a pluralistic line of research whereby the revealing information provided by the Spanish-Arabic lexicographical tradition is also involved. In light of the above, the current study is based on four central themes or objectives, the first of which highlights the inevitable convergence between the past and the present in order to offer a historical-cultural and sociolinguistic contextualization of the lexicographical compendia of the past and diachronic orientation changes. The second objective aims, based on the research carried out, to offer a panoramic view of a set of dictionaries of a general and specialized nature that illustrates the lexicographic scene in the Arabic-speaking and Spanish-speaking world in the 20th and 21st centuries. This, in turn, provides insight into the dominant models in Spanish-Arabic and Arabic-Spanish lexicographical practice. In the view of all these works, the descriptions made provided interesting material to elucidate their own history and give an account of the theory or theories underlying them to open new prospects for improving their quality and adaptation with respect to the shortcomings of these lexical and phraseological corpora. In parallel with and complementary to the aforementioned themes, the third theme seeks to establish the limits of phraseology in Spanish and Arabic, as well as the defining features that determine its classification and linguistic status. In this was, it is intended to establish parallelisms and determine advances and shortcomings in phraseological studies on the language pair in question, which will enable us, in a subsequent step, to adopt a theoretical and methodological dimension of the treatment and segmentation of the phraseological domain before embarking on an evaluative study on the presence of such a range of units in different structures of the most important dictionaries in current Spanish-Arabic lexicographical context. Finally, the fourth objective is to analyze four prominent works of contemporary Spanish-Arabic and Arabic-Spanish dictionary course: the Diccionario avanzado árabe, Tomo II (español-árabe) (2010 [1970]) by Federico Corriente Córdoba and Ahmed Salem Ould Mohamed Baba, the Al-Muín. Diccionario español-árabe (2005 [1993]) by Yussof Mohamed Reda, the Diccionario Avanzado árabe: Tomo I (árabe-español) (2005 [1991]) by Federico Corriente Córdoba and Ignacio Ferrando Frutos, and the Diccionario de árabe culto moderno (árabe-español) (2004 [1996]) by Julio Cortés. Despite the popularity of these four works, no descriptive studies have yet been carried out for bilingual lexicography between Spanish and Arabic to deal with phraseology in an objective and systematic manner. For the empirical phase of this research, the modus operandi was to create, with the help of computerized means, a representative corpus capable of storing and managing all information in a methodical way. In order to condition as little as possible the search and collection of the multiverbal units in the dictionaries under analysis, we opted for building four lexicographic cards including all the combinations appearing under the letter A in the Spanish-Arabic direction and the letter alif in the Arabic-Spanish one. These lexicographic cards include different fields that are intended to evaluate the formal content of each phraseological unit. The final objective is to identify, from a quantitative and qualitative point of view, a set of problems common to all the dictionaries studied to set a milestone for future lexicographic works and research on Spanish-Arabic and Arabic-Spanish bilingual lexicography.La presente tesis doctoral tiene como foco de interés el acercamiento a la situación actual de la fraseología en la lexicografía bilingüe español-árabe y árabe-español y, por extensión, a la historia de los diccionarios bilingües en esta combinación lingüística. Solo conociendo los rasgos, desarrollo y evolución de las obras lexicográficas en el binomio lingüístico seleccionado podremos entender mejor los problemas que presenta hoy el tratamiento de los elementos fraseológicos en el diccionario bilingüe español-árabe, subsanar habituales errores, ensalzar la importancia de los repertorios anteriores y plantearnos retos para el futuro. Para llevar a cabo este estudio, hemos partido de una línea plural de investigación en la que participa también la información reveladora que nos brinda la tradición lexicográfica español-árabe. En este sentido, la presente investigación se articula sobre la base de cuatro objetivos centrales. El primero de estos objetivos responde a la unión inevitable entre el pasado y el presente en aras de ofrecer una contextualización histórico-cultural y sociolingüística de los compendios lexicográficos del pasado y los cambios de orientación con respecto a la diacronía. Un segundo objetivo apunta, a partir de las pesquisas realizadas, a ofrecer una visión panorámica del conjunto de los diccionarios de carácter general y especializado que jalonan la escena lexicográfica en el mundo arabófono e hispanohablante en los siglos XX y XXI. Esto, a su vez, ofrece testimonio de los modelos dominantes en la práctica lexicográfica español-árabe y árabe-español. En la reseña de todas estas obras, las descripciones realizadas se convierten en un material interesante para narrar su propia historia y dar cuenta de la teoría o teorías que subyacen en ellas para abrir nuevas vías de mejora de su calidad y adecuación con respecto a las carencias fundamentales de que adolecen los materiales léxicos y fraseológicos en estas obras. Paralela y complementariamente, un tercer objetivo es el de establecer los límites de la fraseología en español y en árabe y los rasgos definitorios que determinan su clasificación y su estatus lingüístico. Con esto se pretende establecer paralelismos y determinar avances y retrasos de los estudios fraseológicos entre ambas lenguas, lo que nos facultará, en un paso ulterior, para adoptar una dimensión teórica y metodológica del tratamiento y la segmentación del universo fraseológico antes de realizar un estudio valorativo sobre la presencia del abanico de estas unidades en las diferentes estructuras de los diccionarios más importantes en el contexto lexicográfico español-árabe actual. El cuarto y último objetivo, por su parte, es el de analizar cuatro obras notables de la trayectoria diccionarística español-árabe y árabe-español contemporánea: el Diccionario avanzado árabe, Tomo II (español-árabe) (2010 [1970]) de Federico Corriente Córdoba y Ahmed Salem Ould Mohamed Baba, el Al-Muín. Diccionario español-árabe (2005 [1993]) de Yussof Mohamed Reda, el Diccionario Avanzado árabe: Tomo I: árabe-español (2005 [1991]) de Federico Corriente Córdoba e Ignacio Ferrando Frutos y el Diccionario de árabe culto moderno (árabe-español) (2004 [1996]) de Julio Cortés. Pese a la popularidad de estas cuatro obras, aún no se han realizado estudios descriptivos como para que la lexicografía bilingüe entre el español y el árabe trate la fraseología de una forma objetiva y sistemática. Para la consecución del análisis empírico, el modus operandi fue confeccionar, con la ayuda de medios informatizados, un corpus representativo de unidades pluriverbales registradas en los diccionarios mencionados, capaz de almacenar y gestionar de forma metódica toda la información. Para condicionar lo menos posible la búsqueda y recogida de los elementos pluriverbales en los diccionarios objeto de análisis, optamos por construir cuatro fichas lexicográficas que incluyen todas las combinaciones que aparecen bajo la letra A en la dirección español-árabe y la letra alif en la árabe-español. Estas fichas lexicográficas están formadas por diferentes campos tendentes a la evaluación formal y de contenido de cada unidad fraseológica. El objetivo final es identificar desde un punto de vista cuantitativo y cualitativo un conjunto de problemas comunes a todos los diccionarios estudiados para construir un punto de partida para futuras obras lexicográficas e investigaciones sobre la lexicografía bilingüe español-árabe y árabe-español
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