bluuebunny/crossref_metadata_2025 huggingface dataset:
Colaboração e sistema de recompensas em jogo digital para motivação da aprendizagem na educação básica
Authors: Scheffel Erica J. S. , Motta Claudia L. R.
Published: October 2023

Com o propósito de contribuir com a aprendizagem na educação básica, de forma lúdica e colaborativa, este trabalho apresenta uma proposta de jogo digital educativo para dispositivos móveis, a ser desenvolvido com a metodologia Design Science Research (DSR). Na proposta, o jogo se adapta de forma personalizada a partir da observação dos níveis de motivação, colaboração, atenção e planejamento durante a interação dos jogadores. O jogo será testado com estudantes do ensino fundamental de uma escola pública e o possível aumento no desempenho escolar será verificado por meio de comparação dos resultados de avaliações locais.
Entendendo a própria casa: conexões e alinhamentos para capacitar comunidades vulnerabilizadas na era da informação
Authors: Brito Luciana , França Juliana , Dias Angélica , Vivacqua Adriana
Published: October 2023

A pesquisa e representação de pessoas e grupos vulnerabilizados desempenham um papel essencial no entendimento necessário para a promoção de transformação de realidades sociais através da educação em tecnologia da informação. Neste sentido, É importante reconhecer que a falta de participação direta das populações envolvidas desde o início da pesquisa pode limitar suas abordagens, desviando o foco da pesquisa dos interesses das reais das comunidades, marginalizando vozes de lideranças e comprometendo a aproximação do cientista da complexidade das questões sociais implicadas. Considerando fundamental o engajamento das comunidades na pesquisa para a produção de tecnologia que atenda às suas necessidades, propomos uma investigação inicial sobre os interesses de aprendizagem de literacia de dados de comunidades vulnerabilizadas do Rio de Janeiro, com o objetivo de encontrar abordagens consistentes para a criação e aprofundamento das relações no ensino-aprendizagem de Interação Humano-Dados.
Via Twitter ins Amt: Karl Lauterbach, die Corona-Pandemie und das Bundesgesundheitsministerium
Authors: Rosar Ulrich , Poguntke Thomas
Published: October 2023

This article argues that Karl Lauterbach accomplished the office of federal secretary of health mainly due to his Twitter activities and the concomitant exposure in political TV talk shows . Lauterbach had little intraparty support after his failed bid for SPD leadership . He did not hold a senior office within his parliamentary group or within the health policy community . The Land party of North Rhine-Westphalia had placed him on a hopeless position of the Land list for the federal elections . Finally, he played a minor role in the coalition negotiations and did not lead the talks on health policy for his party . With a view to all known informal rules for the selection of government ministers, he was certainly not part of the pool of likely candidates . The detailed quantitative analyses of Lauterbach’s Twit ter and media activities show that it was most likely this self-generated public visibility which explains his appointment .
Die Bürgerschaftswahl in Bremen vom 14. Mai 2023: SPD wieder stärkste Partei, Rot-Grün-Rot wird fortgesetzt
Authors: Probst Lothar
Published: October 2023

After a rather boring election campaign the Social-Democrats (SPD) managed to achieve the position of the strongest party again which they lost to the Christian-Democrats (CDU) in 2019 . The CDU and the Left Party defended more or less their last election results whereas the Greens came up with a loss of more than five per cent of the votes . Apparently, the performance of the Greens in the three-party-coalition with the SPD and the Left Party obtained only low credit by the voters . With 5,1 per cent the Liberals were very close to enter the parliament . The SPD as the strongest party invited the Greens and the Left Party as well as the CDU to exploratory talks but came up very quickly with the decision to continue with the former left coalition . The coalition contract issued by the three coalition parties formulates ambitious goals with respect to investigations in the infrastructure, the ecological transformation of industries, and the increase of personnel in the education system, but remains vague with regard to their financing . The coalition plans to use money for many of these projects from the so-called climate-fonds that was already adopted in the last election period . Against this background the CDU announced that it will call the Bremer Staatsgerichtshof for a judicial review of constitutionality because the budgetary rights of the parliament may be violated by credit authorization without the parliament . Finally, the coalition decided to reallocate senate portfolios . Five portfolios went to the SPD, two to the Greens and the Left Party . Additionally, the representative of Bremen for national and European affairs from the SPD joins the senate in the function of a state councilor .
Die AfD als Auslöser von Regeländerungen? Zu den Regularien der Alterspräsidentschaft in Bundestag und Landesparlamenten nach 2014
Authors: Leunig Sven
Published: October 2023

In the fall of 2017, before the Bundestag elections, the 18th German Bundestag decided that in future the first session of a new election period would no longer be opened by the oldest member in terms of years of age, but by the one who has been a member of the Bundestag the longest . Such a change is permissible on the basis of parliamentary self-organization rights . However, it has been suggested in the media and also by the AfD that the amendment was not intended to safeguard the ability of the age president to chair the session, but rather to avoid the age presidency of an AfD deputy . Against the background of previous age presidencies of AfD deputies in state parliaments since 2014, this paper examines the question of whether such a connection can actually be assumed in the amendment of the rules of procedure of the Bundestag and those of three other state parliaments .
Private Politikfinanzierung: Rechtslage und Regelungsbedarf
Authors: Kück Emma , Meyer Simon
Published: October 2023

Private political financing is protected by constitutional law . Private persons supporting political parties by donations, sponsoring or other financial instruments exercise their fundamental right to political participation . However, private political financing carries the risk of an excessive influence of financially strong citizens and companies potentially affecting democratic equality . The legislator resolves the tension between the conflicting constitutional interests not by a complete ban of donations to political parties, but by obligations of transparency and partial prohibitions of accepting donations . Nevertheless, due to the relatively high publicity limit and the non-consideration of alternative financing opportunities, such as sponsoring, there remain loopholes in the law on political parties enabling a circumvention of donation rules .
Probleme politischer Repräsentation. Carlo Mongardini und der Beitrag der italienischen Politikwissenschaft
Authors: Cubbe Giovanni de Ghantuz
Published: October 2023

To what extent does contemporary political science successfully approach political representation with regard to power – that is, in terms of a relationship of domination? The Italian sociologist and political scientist Carlo Mongardini (1938 – 2021) can be considered one of the last adherents of a “classical mindset” in Italian political science focusing on power, its configuration and allocation . For Mongardini political representation is “the highest political formula” that has emerged in modern history . It is, namely, the instrument par excellence by which the relationship of domination between the rulers and the ruled that emerged out of the end of the Ancien Régime takes place . Only a detailed analysis of such relationship’s transformations makes it possible to understand the contemporary challenges to political representation . Along with Mongardini, this paper aims to draw an analytical thread for the study of political representation as it summarizes its basic configuration and the central features of its transformation up to the present .
Kronzeugen im Europäischen Wettbewerbsnetz
Authors: Herbord Felix
Published: October 2023

The enforcement of the prohibition of cartels under EU law pursuant to Article 101 (1) TFEU is carried out on the basis of Regulation (EC) No. 1/2003 by the EU Commission and the competition authorities of the member states. In this context, leniency programs play an important role as investigative instruments. The thesis deals with problems resulting from the decentralized enforcement of antitrust law in the European Competition Network (ECN) for the use of leniency programs and their possible effects on the effective and coherent enforcement of the prohibition of cartels. In addition, the leniency programs of the Commission, Germany and the United Kingdom are examined in a comparative legal analysis.
Das Recht im filmischen Spiegel
Authors: Odermatt Fabian
Published: October 2023

Whether it is Keanu Reeves’ performance as an ambitious young lawyer in The Devil's Advocate (1997), or the depiction of a fighter pilot’s fate in court in the German TV film Terror – Ihr Urteil (2016): law-related narratives have always been a popular motif in film. What is at the source of the audience's unwavering fascination with cinematic reflections of the law? Based on the concept of seduction, the author makes an interdisciplinary foray into film history and demonstrates that the answer to this question lies in the cinematic staging itself. The analysis focuses on the respective desires of the audience: a desire for an encounter with various law-related myths as well as for experiencing law in film as a sensual event.
Exploring the Institutionalisation of Science Diplomacy
Authors: Epping Elisabeth
Published: October 2023

This work analyses the multi-dimensional concept of science diplomacy. More specifically, it examines the development, establishment and functioning of Science and Innovation Centres (SICs). In an original comparative and longitudinal study, this work closely analyses the institutionalisation of two distinct SICs: Germany’s Deutsche Wissenschafts- und Innovationshäuser (DWIH) and Switzerland’s Swissnex. It further probes why actors participate in SICs by deciphering their differing rationales and thus developing a distinctly actor-centred perspective on science diplomacy. The findings reaffirm that science diplomacy is clearly driven by national interests, while further highlighting that the notion of science diplomacy and its governance (actors, rationales and instruments) can only be fully understood by analysing the national context in question.
Innovative Behaviour Mediates in the Relationship between Employee Creativity and Organisational Innovation
Authors: Hussain Khawar , Wahab Eta
Published: October 2023

The telecommunications industries play a vital role in enhancing Malaysia’s innovation level. In this perspective, telecommunications industries need innovative human resources development. Therefore, the study attempts to examine the effect of employee creativity (EC) on organisational innovation (OI) through the mediating role of innovative behaviour (IB). A quantitative study was conducted by survey questionnaires to the employees of telecommunications industries in Malaysia. In addition, structural equation modelling (SEM) is used to determine the effect of employee creativity on organisational innovation through the mediating role of innovative behaviour with the support of the componential theory of organisational creativity and innovation. Finally, the results found that innovative behaviour significantly mediated in the relationship between employee creativity and organisational innovation. Thus, the research study has had a beneficial effect on innovation in the telecommunications industries in Malaysia.
Why Could the “Hatun Ñan Orqupi Llamcama” Ecotourism Microcircuit, Apurimac-Peru, be Sustainable?
Authors: Rafael Valle Díaz Felipe , Apaza Apaza Oscar , Iván Rodriguez Peceros Rosmel , Huamán Cuya Alfredo , Lima Román Percy , Montesinos Palomino Artemio
Published: October 2023

The purpose was to describe and illustrate the characteristics that give sustainability to the use of the ecotourism microcircuit Hatun ñan orqupi Lamcama. The design is non-experimental, linked to the case study design. The sample was the closed circuit of ecotourism resources located in Llamcama’s town. The method applied was on-site with the satellite capture support for orientation, location of resources, and mapping of trails, added to assess the vulnerability of ecotourism resources, use of the interview technique. Sustainability focuses on: (a) organizing local tour operators, who could serve a maximum of 80 visitors a day and 400 visitors a week, at a ticket cost of 5 PEN per visitor, total revenue per week and month, will be: 2000 PEN and 8000 PEN respectively; (b) accessibility is good to moderate in high season, changing to low in rainy season; (c) the security in the transfer and internal route is high, the signaling exists; d) the resources are characterized by being geometric shapes or anthropomorphic or zoomorphic approximation in the relief, caused by the forces of rain and wind; added to cave formations.
Harnessing Soil Potential: Innovation in Strategic Tillage and Management – New Perspectives
Authors: Ali Sajid , Zahid Adnan , Fatima Ammara , Ahmad Mukhtar , Tariq Manzoor Muhammad , Ayub Asma , Raza Ahmad , Shafqat Nauman
Published: October 2023

The sustainability of the environment and the productivity of agriculture are both critically dependent on soil. Maximizing agricultural yields while reducing agriculture’s negative environmental effects is becoming more and more important as the world’s population continues to expand. Innovating tillage and management techniques to harness the potential of the soil is a topic that is explored in this chapter. The first section of the chapter describes the difficulties that contemporary agriculture faces, such as soil erosion, nutrient depletion, and water shortages. The part new technology has played in managing soil. Making educated management decisions is made easier by using precision agricultural technology like soil sensors, remote sensing, and geographic information systems (GIS). These technologies provide useful insights into soil variability. It emphasizes how crucial it is to implement sustainable soil management techniques in order to guarantee long-term agricultural output and ecological harmony. The chapter’s conclusion emphasizes the need of maximizing soil potential through creative methods of tactical tillage and management. Agricultural systems may raise crop yield, lessen their environmental effect, and become more resilient to climate change by using sustainable soil practises, assuring a more sustainable and food-secure future.
Effects of Herbal Products on Menorrhagia: A Systematic Review and Meta-analysis
Authors: Fakhri Moloud , HamzehGardeshi Zeinab , Yousefi Seyde Sedighe
Published: October 2023

Context: Menorrhagia is an important healthcare challenge. Complementary and alternative medicine therapies are strategies with potential positive effects on menorrhagia. Objectives: The aim of this study was to systematically assess the effects of herbal products on menorrhagia. Methods: This was a systematic review and meta-analysis. PubMed, Scopus, Web of Science, Embase, Cochrane Library, Barekat Gostar, Scientific Information Database (SID), Magiran, and IranDoc international and Iranian databases, in addition to the Google Scholar search engine, were searched without any time or language limitation (updated until 02.07.2022). Eligible studies were combined through the random-effects model based on their sample sizes, mean scores, and standard deviations. Data analysis was performed at a significance level of less than 0.05 using STATA software (version 14.0). Results: Nineteen trials on 1715 women (856 and 859 subjects in the control and intervention groups, respectively) were reviewed. After the intervention, menstrual bleeding severity in the first, second, and third cycles (P < 0.001) and the number of menstrual days in the first (P < 0.001), second (P < 0.001), and third (P = 0.487) menstrual cycles significantly decreased in the herbal products group. There were no significant between-group differences regarding the bleeding severity at the pretest (P < 0.001) and in the third cycle (P < 0.001) and the number of menstrual days at the pretest (P = 0.131) and in the second (P < 0.001) and third cycles (P = 0.014). However, the bleeding severity in the intervention group was significantly less than the control group in the first (P < 0.001) and second cycles (P < 0.001), and the number of menstrual days in the intervention group was significantly less than the control group in the first cycle (P = 0.004). Conclusions: Herbal products are effective in significantly reducing bleeding severity and the number of menstrual days among women with menorrhagia, and their effects reduce over time.
Complejidad de estructuras geométricas y combinatorias
Authors:   , Hernando Martín M. Carmen
Published: October 2023

En la presente memoria, se abordan cuatro problemas, existiendo en todos ellos una gran interacción entre la combinatoria y la geometría. El primer problema que se estudia es la introducción de varias extensiones del concepto de tipo de orden para nubes de puntos. Concretamente, se introducen los tipos de orden circulares y triángulares, en las versiones orientada y no orientada. Se han demostrado resultados combinatorios análogos a resultados bien conocidos sobre tipos de orden ordinarios, introducidos por Goodman y Pollack como es el llamado Teorema de ordenación geométrica. Se ha estudiado también la información geométrica que proporciona cada uno de estos conceptos. El segundo problema estudia el empaquetamiento plano de grafos; esto es, el trazado de grafos, disjuntos en aristas, en el plano. Hemos obtenido varios resultados sobre el empaquetamiento plano de árboles y ciclos. Concretamente, para árboles que no sean estrellas, se ha demostrado que siempre admiten empaquetamiento plano: dos copias de un árbol cualquiera, un árbol cualquiera y un camino, un árbol cualquiera y un ciclo. También se han obtenido resultados sobre empaquetamiento plano de dos o tres ciclos. La principal herramienta que se ha utilizado es la representación de un árbol en un polígono convexo con propiedades muy concretas. En tercer lugar se estudia el grafo T (P) de árboles geométricos de una nube de puntos P, siendo este grafo el que tiene por vértices los árboles generadores sin cortes de P y dos de tales árboles T1, T2 son aduacentes si y sólo s, T2C=t1e+f para ciertas aristas e y f. Se han obtenido propiedades combinatorias de estos grafos, especialmente en el caso particular en que el conjunto de puntos esta en posición convexa. En este caso se ha determinado el centro, radio y grupo de automofismos de estos grafos, y demostrado que son hamiltonianos y de conectividad máxima. Finalmente, también se ha estudiado el grafo Mm de los emparejamientos perfectos sin cortes de una nube de 2m puntos en posición convexa. Entre los resultados obtenidos cabe destacar que se ha demostrado que Mm es bipartito, hamiltoniano sólo si m es par y que el diámetro de Mm es igual a m-1, siendo todos los emparejamientos de excentricidad máxima.
Flatness, tangent systems and flat outputs
Authors:   , Franch Bullich Jaume
Published: October 2023

En esta tesis doctoral se presentan diversos métodos para la linealización de sistemas de control no lineales o para el estudio de la platitud. Se utilizan dos aproximaciones diferentes, en concreto: geometría diferencial y álgebra diferencial.

En el marco de álgebra diferencial, se presenta un estudio de los sistemas lineales de control desde la perspectiva de la teoría de módulos. A pesar de que los resultados han sido establecidos previamente por otros autores, algunas demostraciones y ejemplos son originales.

Entre las nuevas demostraciones cabe resaltar la que se refiere a la equivalencia entre sistemas de control lineales en representación de variables de estado, y los módulos sobre un anillo de operadores diferenciales. Los resultados de este estudio son ampliamente utilizados en el desarrollo de otros capítulos de la tesis en los que se usa el álgebra diferencial. En este contexto las principales contribuciones son:

Una nueva demostración del hecho, bien conocido, que la linealización por realimentación estática y la linealización por realimentación dinámica son equivalentes en el caso de sistemas de entrada simple. Para la linealización de este tipo de sistemas, se desarrolla un nuevo algoritmo.

Un procedimiento teórico para linealizar sistemas de entrada múltiple, basado en el cociente de módulos. También se ha hecho un paquete informático para llevar a cabo los cálculos necesarios. Debe mencionarse que este procedimiento es válido para linealizar sistemas mediante realimentación estática, así como para sistemas que sólo puedan linealizarse mediante realimentación dinámica.

Una condición para comprobar si las salidas linealizantes encontradas pueden obtenerse mediante prolongaciones. Como aplicación, se muestran algunos ejemplos de sistemas linealizables por prolongaciones. Algunos de estos sistemas se creían que no eran linealizables mediante esta técnica.
La Razón de la estructura
Authors:   , Godoy Puertas Jesús
Published: October 2023

El progreso científico modifica nuestra visión de la realidad y consecuentemente sus expresiones culturales. Así, la irrupción de la ciencia en el campo de la técnica no solo amplió su potencial de crucero, sino que alteró sus manifestaciones. El planteamiento del papel a desempeñar por los elementos estructurales en la configuración del espacio arquitectónico se realiza efectivamente con el Racionalismo, hecho al que no es ajena la aparición de las nuevas técnicas estructurales de la mano del prestigio de la ciencia. Su planteamiento da un protagonismo a la estructura que no había tenido a lo largo de las historia. El punto de inflexión que se produce en el aprecio cualitativo del sistema estructural a partir de la influencia de Viollet pone de manifiesto la relación entre teoría y realización, mostrando una vez más que "las cosas existen cuando las nombramos".
En efecto, la tesis hace una indagación teórica y práctica por diversas arquitecturas, mostrando que las interpretaciones que se han hecho de la arquitectura histórica como ejemplo de racionalidad estructural, de lógica constructiva, chocan con una realidad contradictoria, y que el planteamiento de la significación de los elementos estructurales como tales era inexistente.
Es a partir del Racionalismo cuando las apasionadas discusiones en torno a las nuevas técnicas colocarán a la estructura en un plano significativo que no había tenido hasta entonces. La estructura que siempre había sido un medio al servicio de una idea pasa en mucha obras a ser la Idea de la arquitectura. El estructuralismo modernista se entiende así como una consecuencia lógica de esta interpretación racional.
La aventura formal de la estructura que catalizó Viollet y de la que este trabajo recoge una significativa muestra, pone de manifiesto el valor expresivo de la arquitectura , relativizando desde una óptica más amplia la verdad estructural como esencia de la arquitectura, que fue la bandera del Racionalismo y otras ópticas similares que ponían el acento en otros componentes de la disciplina. La evolución de la técnica estructural tendrá como lógico corolario la liberación del muro que adquiere un protagonismo inusual en la configuración del espacio moderno.
El trabajo concluye con una reflexión sobre las posibilidades de aplicación del método científico a la actividad de proyectas, actividad con un importante componente figurativo, expresión de una realidad cultural y por tanto cambiante y su relación con el orden estructural, no siempre congruente pero necesariamente compatible con el orden o la voluntad formal.
Analysis of the suction chamber of external gear pumps and their influence on cavitation and volumetric efficiency
Authors:   , Campo Sud David del
Published: October 2023

Hydraulic machines are faced with increasingly severe performance requirements. The need to
design smaller and more powerful machines rotating at higher speeds in order to provide increasing
efficiencies, has to face a major limitation: cavitation.
A two-dimensional numerical approach, by means of Computational Fluid Dynamics (CFD), has
been developed for studying the effect of cavitation in the volumetric efficiency of external gear
pumps. Several cavitation models and grid deformation algorithms have been studied, and a method
for simulating the contact between solid boundaries has been developed. The velocity field in the
inlet chamber has also been experimentally measured by means of Time-Resolved Particle Image
Velocimetry (TRPIV) and results have been compared to the numerical ones in order to validate
the accuracy of the model.
Our two-dimensional model is not able to predict the real volumetric efficiency of the pump, since
several simplifications are involved in it. Nevertheless, this model shows to be valid to understand
the complex flow patterns that take place inside the pump and to study the influence of cavitation
on volumetric efficiency. The influence of the rotational speed of the pump has been analyzed, as
well as the effect of the geometry of the inlet chamber, the working pressure, the inlet pressure loss
factor, and the flow leakage through the radial clearances of the pump between gears and casing.
Point-set manifold processing for computational mechanics: thin shells, reduced order modeling, cell motility and molecular conformations
Authors:   , Millán Daniel
Published: October 2023

In many applications, one would like to perform calculations on smooth manifolds of dimension d embedded in a high-dimensional space of dimension D. Often, a continuous description of such manifold is not known, and instead it is sampled by a set of scattered points in high dimensions. This poses a serious challenge. In this thesis, we approximate the point-set manifold as an overlapping set of smooth parametric descriptions, whose geometric structure is revealed by statistical learning methods, and then parametrized by meshfree methods. This approach avoids any global parameterization, and hence is applicable to manifolds of any genus and complex geometry. It combines four ingredients: (1) partitioning of the point set into subregions of trivial topology, (2) the automatic detection of the local geometric structure of the manifold by nonlinear dimensionality reduction techniques, (3) the local parameterization of the manifold using smooth meshfree (here local maximum-entropy) approximants, and (4) patching together the local representations by means of a partition of unity.

In this thesis we show the generality, flexibility, and accuracy of the method in four different problems. First, we exercise it in the context of Kirchhoff-Love thin shells, (d=2, D=3). We test our methodology against classical linear and non linear benchmarks in thin-shell analysis, and highlight its ability to handle point-set surfaces of complex topology and geometry. We then tackle problems of much higher dimensionality. We perform reduced order modeling in the context of finite deformation elastodynamics, considering a nonlinear reduced configuration space, in contrast with classical linear approaches based on Principal Component Analysis (d=2, D=10000's). We further quantitatively unveil the geometric structure of the motility strategy of a family of micro-organisms called Euglenids from experimental videos (d=1, D~30000's). Finally, in the context of enhanced sampling in molecular dynamics, we automatically construct collective variables for the molecular conformational dynamics (d=1...6, D~30,1000's).
On the consistency of hysteresis models
Authors:   , Fuad Mohammad Naser Mohammad
Published: October 2023

Hysteresis is a nonlinear behavior encountered in a wide variety of processes including biology, optics, electronics, ferroelectricity, magnetism, mechanics, structures, among other areas. One of the main features of hysteresis processes is the property of consistency formalized in [52]. The class of operators that are considered in [52] consists of the causal ones, with the additional condition that a constant input leads to a constant output. For this class of systems, consistency has been defined formally. This property is useful in system modeling and identification as it limits the search for the system's parameters to those regions where consistency holds.
The thesis applies the concepts introduced in [52] to some hysteresis models, namely LuGre model and Duhem model. The aim of the thesis is to derive necessary conditions and sufficient one for consistency (or/and strong consistency) to hold.
For the LuGre model, the consistency and the strong consistency are studied under minimal conditions in Chapter 2. As a by-product of this study, explicit expressions are derived for the hysteresis. Such expression may be useful for identification purposes as shown in [53].
A classification of the possible Duhem models in terms of their consistency is carried out in Chapter 3. This study shows that a parameter’s should be one for the Duhem model to be compatible with a hysteresis behavior.

La histéresis es un fenómeno nolineal encontrado en varios procesos como biología, óptica, electrónica, ferroelectricidad, magnetismo, mecánica, estructuras, así como en otras áreas. Una de las características de los sistemas con histéresis es la propiedad de consistencia formalizada en [52]. La clase de operadores considerados en [52] consiste en aquellos que son causales, con la condición adicional que a una entrada constante corresponda una salida constante. Para esta clase d sistemas, la consitencia ha sido definida formalmente. Esta propiedad es útil en modelado e identificación dado que limita la búsqueda de parámetros a aquellas regiones donde la consistencia es válida.
* Esta tesis aplica los conceptos introducidos en [52] a algunos modelos de histéresis, más precisamente al modelo de LuGre y al modelo de Duhem. El objetivo de esta tesis es encontrar condiciones necesarias y condiciones suficientes para que se satisfaga la consistencia (o/y la consitencia fuerte).
* Para el modelo de LuGre, la consistencia "fuerte" se estudia en el capítulo 2 bajo condiciones mínimas. Como resultado de este estudio, se hallan fórmulas explícitas del lazo de histéresis. Tales fórmulas podrían ser de utilidad para tareas de identificación como se demuestra en [53].
* El capítulo 3 de la tesis presenta una clasificación de los modelos de Duhem posibles en términos de su consistencia. Este estudio muestra que hay un parámetro que tiene que valer uno para que el modelo sea compatible con un comportamiento histerético
Estudio de mezclas de refrigerantes para un circuito frigorífico aplicado a la deshumidificación del aire
Authors:   , Cánovas Bermejo Catalina
Published: October 2023

The present thesis is undertaken to study the use of an aqueous solution of LiCl as a secondary refrigerant, due to its dehydrating properties, in those refrigeration applications that require mainly the air dehumidification and where the conventional methods show technical difficulties and/or a high energetic cost.
The study of mass and heat transference between the aqueous solution of LiCl and the air is made, and it is applied to different conditions of dry temperature and air relative humidity.
Regeneration of the aqueous solution of LiCl is solved using the condenser thermal power from the same refrigeration circuit, removing the dependence on other external heat sources, thus increasing the installation energetic efficiency.
The analysis of the obtained results and the energetic comparative regarding to the conventional methods used so far show this is really an alternative to consider.

En la presente tesis doctoral se acomete el estudio del uso, gracias a sus propiedades deshidratantes, de una solución acuosa de LiCl como refrigerante secundario, en aquellas aplicaciones frigoríficas que requieren principalmente la deshumidificación del aire y donde los métodos convencionales presentan dificultades técnicas y/o elevado coste energético. Se realiza el estudio de la transferencia de masa y calor entre la solución acuosa de LiCl y el aire y se aplica a diferentes condiciones de temperatura seca y humedad relativa del aire. Se resuelve la regeneración de la solución acuosa de LiCl utilizando la potencia térmica del condensador del mismo circuito frigorífico, eliminando así la dependencia de otras fuentes de calor externas y aumentando la eficiencia energética de la instalación. El análisis de los resultados obtenidos y la comparativa energética respecto a los métodos convencionales que se utilizan hasta ahora, muestra que es una alternativa a considerar.
Place, sketch and architecture : an in-situ approach to contemporary design.
Authors:   , Harris Sebastian Francis
Published: October 2023

Esta tesis analiza cómo el croquis in-situ puede profundizar la conexión entre la arquitectura y el lugar en todas las etapas del proceso proyectual. La primera parte considera cómo el croquis in-situ puede estructurar las percepciones de lugar, subjetividad y tiempo, integrándolas en el proceso creativo. La segunda parte investiga las relaciones conceptuales subyacentes entre los dibujos de viaje y bocetos de proyecto a través del análisis comparativo de los dibujos de Le Corbusier y Alvaro Siza. En la tercera parte se utilizan los croquis del propio autor para examinar las complejas relaciones entre el lugar y los bocetos de proyecto centrándose en las siguientes obras: la Acrópolis, Can Lis (Jorn Utzon) y el Mercado de Santa Caterina (EMBT). La cuarta parte presenta estos argumentos teóricos en un cuaderno de bitácora, trazando una secuencia de relaciones interconectadas entre la arquitectura y el lugar utilizando ejemplos de todo el mundo. Se utilizan bocetos y diagramas del autor para argumentar cómo el croquis in-situ es un proceso mental complejo que combina la observación de la realidad con el proceso proyectual. Además, el croquis in­situ construye una comprensión estratificada del lugar y del tiempo que forman la base esencial del pensamiento y diseño arquitectónico.

This thesis analyses bow sketching in-situ can deepen the connection between architecture and place throughout all stages of the design process. Part one considers how in-situ sketching can structure human centered perception s of place, subjectivity and time, integrating them positively into the creative process. Part two investigates underlying conceptual relationships between travel drawings and design sketches through comparative graphic analysis of the sketches of Le Corbusier and Alvaro Siza. In part three, the author's own in-situ sketches scrutinize the complex and contrasting relationships between place and architecture focusing on the Acropolis, Can Lis (Jom Utzon) and Santa Caterina Market (EMBT). Part four presents these theoretical arguments as a graphic logbook, charting a sequence of interconnected relationships between architecture and place from around the globe. The author’s sketches and diagrams are used to argue how in-situ drawing involves a complex though t process which combines observation of reality with the design process. It constructs a layered understanding of place and time, forming the essential basis of architectural thought and design
On The Concept of Independent Nature
Authors: Scoville J. Michael ,   International Association for Environmental Philosophy
Published: October 2023

Multiple concepts of nature are at play in environmental theory and practice. One that has gripped several theorists is the idea of nature as referring to that which is independent of humans and human activity. This concept has been subject to forceful criticism, notably in the recent work of Steven Vogel. After clarifying problematic and promising ways of charac­terizing independent nature, I engage Vogel’s critique. While the critique is compelling in certain respects, I argue that it fails to appreciate what I take to be an important motivating concern of those drawn to the concept of independent nature, or something like it. I offer a characterization of that concern—a worry about problematic instrumentalization of the nonhuman world—and suggest why this concern, and the idea of independent nature which helps to make it intelligible, should continue to inform environmental theory and practice. In offering a qualified defense of the concept of independent nature, and of its value, I assume that such a concept is only one possible tool in a multi-pronged approach to environmental theorizing, deliberation, action, and policy.
Seven new narrowly endemic species of Gulella Pfeiffer, 1856 from eastern South Africa (Gastropoda, Streptaxidae) and status revision for another
Authors: Cole Mary L. , Herbert David G.
Published: October 2023

Seven new species of very small Gulella Pfeiffer, 1856 are described from two regions in the interior of south-eastern South Africa within the Maputaland-Pondoland-Albany biodiversity hotspot. In addition, the status of Gulella darglensis benthodon van Bruggen, 1980 is revised and raised to species level. All species are very small-shelled and are narrow-range endemics. Six species, G. judithmastersae sp. nov., G. kevincolei sp. nov., G. hlathikhulu sp. nov., G. nkandla sp. nov., G. mystica sp. nov. and G. libertas sp. nov. are each known from only one locality. The first two as well as G. benthodon and G. mcmasteri sp. nov. are found only in the Amathole Mountains, where poaching, illegal harvesting of plant products and uncontrolled access of cattle take place, including in protected areas. The other four species each occur at one locality in north-central KwaZulu-Natal. The localities of three of the last-mentioned species are in protected areas although they are isolated and surrounded by a heavily transformed cultural landscape rendering enforcement of conservation legislation a challenge. Six species occur in nature reserves, highlighting the importance of small pockets of protected habitat for the conservation of terrestrial snails.
Understanding Society: A Longitudinal Study of Social and Economic Dynamics in the UK
Authors: Reynolds Charlotte , Thompson James , Hawthorne Isabella , Turner William
Published: October 2023

The "Understanding Society" project delves into the intricate dynamics of the United Kingdom's societal landscape. This longitudinal study explores key facets of societal transformation, including family structures, employment trends, education, and health outcomes. Leveraging comprehensive longitudinal data, the research employs a multidimensional methodology combining quantitative analyses and qualitative insights. The dataset encompasses a diverse cohort of individuals, households, and communities, allowing for a comprehensive examination of temporal trends. Statistical analyses discern underlying patterns, while qualitative methods capture individual experiences and perspectives. Key findings provide valuable insights for policymakers, researchers, and stakeholders, illuminating current trends and shaping future interventions.
Advances in the use of cell-membrane encapsulated nanoparticles to target tumor drugs
Authors: Feng Mengdie , Zheng Yonghua
Published: October 2023

Cancer treatment faces multiple challenges, including tumor heterogeneity, drug resistance, microenvironment influence, treatment side effects, and treatment cost. The heterogeneity of the tumor makes the effect of the same treatment vary in different patients, so the development of personalized treatment strategies is crucial. In addition, resistance of tumor cells to therapeutic drugs is a major challenge, and new strategies to overcome resistance are needed. As a cutting-edge field of science and technology, nanotechnology has brought great potential and opportunities for tumor treatment. Nanoparticle drug delivery systems improve drug efficacy and reduce side effects through precise targeted delivery and controlled release. Cell-membrane coated nanoparticles show great promise in tumor therapy. Nanoparticles coated with cell membranes have good biocompatibility, can reduce the obstacles of immune rejection and cell uptake, improve the accumulation and retention of drugs in tumor tissues, and have good drug delivery ability, drug stability and control release ability. This review discusses advances in the use of cell-membrane coated nanoparticles to target tumor drugs.
The linkage between different learning contexts
Authors: Díaz-Lozano Abimael
Published: October 2023

The article analyzes the importance of the linkage in the pedagogical process of the different learning contexts. The role of the teacher is highlighted when conceiving and designing a classroom environment. Among the aspects that are addressed are the different contexts from a comprehensive perspective, which allow understanding the whole environment that surrounds and influences the student learning.

Keywords:

Education, skills, learning contexts.

 

RESUMEN

En el artículo se analiza la importancia de la vinculación en el proceso pedagógico de los distintos contextos de aprendizaje. Se destaca el papel del docente en el momento de concebir y diseñar un ambiente en el aula. Entre los aspectos que se abordan se encuentran los diferentes contextos desde una mirada integral, que permitan conocer todo el ambiente que rodea e influye en el aprendizaje de los estudiantes.

Palabras clave:

Educación, habilidades, contextos de aprendizaje.
Current Bio-based Cements and Radioactive Opacifiers in Endodontic Approaches: A Review of the Materials Used in Clinical Practice
Authors: Saud A.Najah , Koç Erkan , Özdemir Olcay
Published: October 2023

Objective: This study aims to evaluate the importance of endodontic root canal sealers in filling cavities and irregularities in root canals with the primary goal of minimizing or eliminating bacterial residues. Despite this crucial objective, it's noteworthy that several conventional sealers have been linked to adverse effects, such as impaired wound healing, inflammation, and bone resorption. Therefore, there is a constant search for an optimal sealer that can effectively mimic the properties of lost tissue while maintaining an acceptable level of biological, physicochemical and biocompatible properties. The present study analyzes bioceramic cement's properties in endodontics through a comprehensive review of the available literature. Also, to evaluate the beneficial properties and characteristics of the biomaterials highlighted in this work.
Methods: The present study used a systematic review approach to conduct a comprehensive literature search to find relevant publications on bioceramic cement properties in the endodontics field. Articles were retrieved using MeSH keywords and digital searches of journal websites. The selected studies were examined to extract data on sealability, bioactivity, pH, cytotoxicity, color change, radiopacity, edge adaptation, adhesive strength, antibacterial properties and biocompatibility.
Results: The results of the reviewed research show that bioceramic endodontic cement has favorable properties for the therapeutic treatment of root canals. The literature highlights the material's biocompatibility, low cytotoxicity, bioactivity, radiopacity, appropriate pH value, favorable edge adaptation, high adhesive strength, practical sealability, antibacterial properties and minimal color change.
Conclusion: Research results to date indicate that biomaterials used in endodontics have beneficial properties for root canal therapy and mimicking natural tissue regeneration. The beneficial properties of these materials, such as their biocompatibility, bioactivity, radiopacity, pH stability, edge conformability, adhesion strength, sealability and antibacterial properties, make it a promising replacement for traditional sealers. Further studies are needed to investigate the extended clinical effectiveness of the above intervention and to refine its composition to improve the outcomes associated with endodontic therapies.
A Case of Cardiac Regression in a Lebanese Patient with Duchenne Muscular Dystrophy Following the Discontinuation of Ataluren
Authors:   Neurometabolic unit, Saint Georges Hospital University Medical Center, Saint George University of Beirut, Lebanon., Tonia Harb , Marie-Therese Eid ,   Neurometabolic unit, Saint Georges Hospital University Medical Center, Saint George University of Beirut, Lebanon., Andre Megarbane ,   Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Lebanon., Hicham Mansour ,   Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Lebanon.
Published: October 2023

Here we present the case of a 16 years old Lebanese boy diagnosed with a Duchenne muscle dystrophy secondary to a nonsence mutation, with clinical signs appearing by the age of 5 years and followed by the classical deterioration pattern of Duchenne muscle dystrophy. The patient was started on steroids at 6 years of age and was wheelchair bound by the age of 12. The patient was followed with yearly cardiac ultrasounds since the diagnosis that were always within normal limits. At the age of 14, the Ataluren was started on corticoids and then the medication was started at 40 mg/kg/day. After 3 months of treatment with Ataluren, the patient was able to move his lower limbs in a limited range, improvement was noted in his fine motor skills, and he reported decrease in muscle pain and fatigue during physical therapy sessions. The patient had a cardiac ultrasound after 3 months of treatment showing a normal left ventricular function with an ejection fraction of 53% and a left ventricle thickness of 45 mm. The medication was given for 1 year with noted motor improvement and stability of the cardiac function. One year later due to financial reasons the medication was stopped. After 3 months a regular clinical evaluation showed a persistence of the motor gains already acquired during the treatment period but the cardiac ultrasound showed a clear regression of the cardiac function with an increase in the thickness of the left ventricle to 53 mm and a decrease of the ejection fraction to 35% followed by a stabilization for 4 years. This finding highlights the importance of the continuity of treatment with Ataluren and suggests the risk of cardiac regression in case of rapid treatment discontinuation.