Identifying networks with common organizational principles

Many complex systems can be represented as networks, and the problem of network comparison is becoming increasingly relevant. There are many techniques for network comparison, from simply comparing network summary statistics to sophisticated but computationally costly alignment-based approaches. Yet it remains challenging to accurately cluster networks that are of a different size and density, but hypothesized to be structurally similar. In this paper, we address this problem by introducing a new network comparison methodology that is aimed at identifying common organizational principles in networks. The methodology is simple, intuitive and applicable in a wide variety of settings ranging from the functional classification of proteins to tracking the evolution of a world trade network.Comment: 26 pages, 7 figure

Advertising regulation in the new consumer statute. Implications from the contract theory standpoint

En la contratación masiva contemporánea, el acercamiento entre los productores y/o proveedores de bienes y servicios y los consumidores se hace mayoritariamente a través de la publicidad. Dicha publicidad contiene elementos de información dirigidos al público, que pretenden modificar sus decisiones de consumo, por lo que se permite la inclusión de “elogios subjetivos del anunciante”. Frente a esta situación se plantean dos interrogantes: ¿lo que se dice en la publicidad vincula al anunciante? Y en caso de que la publicidad sea engañosa ¿qué consecuencias jurídicas se derivan de ello? Las respuestas a estos dos interrogantes varían según la naturaleza de la relación jurídica que exista entre las partes, la cual puede ser civil, mercantil o de consumo.In the contemporary mass hiring, the rapprochement between producers and/or suppliers of goods and services and the consumers is achieved mainly through advertising. This advertising has information elements aimed at the audience that intend to modify their consumption decisions, that is why the inclusion of “subjective compliments by the advertiser” is allowed. Two questions arise from this situation: does what is said in the advertisements bind the advertiser? And in the case the advertisements are actually misleading, what juridical consequences branch out from that? The answers to these two questions vary according to the nature of the juridical relation existing between the parties, which can be civil, commercial or of consumption

Obtaining Au thin films in atmosphere of reactive nitrogen through magnetron sputtering

4d and 5d series of the transition metals are used to the obtaining nitrides metallic, due to the synthesis of PtN, AgN and AuN in the last years. Different nitrides are obtained in the Plasma Assisted Physics Vapour Deposition system, due to its ionization energy which is necessary for their formation. In this paper a Magnetron Sputtering system was used to obtain Au thin films on Si wafers in Nitrogen atmosphere. The substrate temperature was varied between 500 to 950°C. The samples obtained at high temperatures (>500°C) show Au, Si and N elements, as it is corroborated in the narrow spectrum obtained for X-Ray Photoelectron Spectroscopy; besides the competition of orientation crystallographic texture between (111) and (311) directions was present in the X-Ray Diffraction analysis to the sample heated at 950°C

Model-based aerodynamic-angle attitude control of an atmospheric entry capsule

The paper describes the attitude control system of a low lift-to-drag biconic atmospheric entry capsule based on the Embedded Model Control methodology. The control structure derives from the development of the attitude dynamics and kinematics written in terms of aerodynamic angles, instead of Euler/quaternion kinematics. A detailed development of the simplified set of equations linking the torques generated by the reaction control system with the time evolution of the aerodynamic angles is provided. The simplified set of equations becomes the core of the control algorithm. The bank angle dynamics is shown to be fourthorder and forced by yaw and roll torques. A dynamic dispatching technique is proposed for converting fourth-order dynamics into a pair of second order systems. Nonlinear dynamic inversion and active disturbance rejection are employed to handle gyroscopic torques, parametric errors and to compensate for angular variation of translational velocity. A bank reversal logic is designed to reduce the effect of bank reversals on the translational motion. The performance of the attitude control algorithm has been tested on a high fidelity simulator and relevant results are presented

II Workshop on Modeling and Simulation for Science and Engineering

II Workshop on Modeling and Simulation for Science and Engineering (II WMSSE) was a conference conducted at Universidad Tecnológica de Bolívar, in the city of Cartagena de Indias, Colombia, on September 24, 25 and 26, 2019. There, works in several topics of science, technology and engineering were presented. Specially, the participants of conference wanted to bring some solutions to the actual industrial requirements such as improvement and optimization of the heat transfer equipment, electronic devices, system control by mean of computational modeling. Also, dynamic system control was widely used for the prediction of power flow market, diffusion of bacteria in coffee production, stress concentration in industrial machines, analysis of population dynamics, model of hydrological and pluviometric networks, encryption for intercommunication of substation control centers, and others

Challenges in the Teaching Profession: A Look at Current Realities

The teacher personifies in himself a core edge in the entire educational framework, even when his work may go unnoticed, misunderstood, or undervalued. On him falls the inescapable responsibility of training in aspects, such as the scientific; but also the human, in order to progressively build a better society. Despite this, this profession involves a myriad of speculations and myths that distort the perception of the teacher’s work, condescending conjectures that little or nothing are adapted to the reality involved in practice. In this regard, this research aims to delve into and reveal the most significant realities that circumscribe the teaching profession, as an activity that goes beyond just teaching in classrooms. Teaching has endless activities, challenges, complexities, and realities that cannot be superimposed only with the staging that allows the transfer of knowledge. Thus, the study was approached under a qualitative-non-interactive methodological approach, with an exploratory scope and documentary research design. From this perspective, taking into account references related to the subject and conversations with teachers from different educational institutions in Latin American countries, eight premises were identified and discussed as realities of the teaching profession: Teaching profession and social recognition, Erosion of the positive perception of the profession, values vs. society, teaching and the media, precarious salaries, stress and work overload, decreasing role of the teacher, and silence of the teachers. The present investigation concluded, among other things, that there is a need to know in depth the specific elements that surround the realities of the teaching profession, thus avoiding the generation of epistemological conceptions that distort the appreciations of this job. In addition, it is important to highlight that the contribution of this research lies in explicitly collecting the realities of the teaching profession; making the caveat that until now no study with these characteristics have been found in the scientific literature. Keywords: teaching profession, education, teaching myths, teaching realities, teaching challenges. Resumen El docente personifica en sí mismo una arista medular en todo el entramado educativo, aun cuando su labor pueda pasar desapercibida, incomprendida o infravalorada en la particularidad. obre él recae la ineludible responsabilidad de formar en aspectos, como el científico; pero también el humano, con la finalidad de construir progresivamente una mejor sociedad. A pesar de esto, S esta profesión envuelve un sinnúmero de especulaciones y mitos que distorsionan la percepción de labor del docente, condescendiendo conjeturas que poco o nada se adecuan a la realidad envuelta en la práctica. A este respecto, el propósito de esta investigación consistió en ahondar y develar las realidades −más significativas− que circunscriben la profesión docente, como una actividad que va más allá de sólo impartir clases en las aulas. La docencia, lejos de ser encasillada únicamente de esta manera, tiene un sinfín de actividades, retos, complejidades y realidades que no pueden ser superpuestas tan solo con la puesta en escena que permite la transferencia de conocimientos. Así, el estudio fue abordado bajo un enfoque metodológico cualitativo-no interactivo, con alcance de tipo exploratorio y diseño de investigación documental. Bajo esta perspectiva, tomando en cuenta referencias relacionadas con la temática y conversaciones con docentes de diferentes instituciones educativas en países de Latinoamérica, se identificaron y discutieron 8 premisas como realidades de la profesión docente: Profesión docente y reconocimiento social, Erosión de la percepción positiva de la profesión, Valores vs. Sociedad, Docencia y medios de comunicación, Precariedad de los salarios, Estrés y sobrecarga laboral, Protagonismo decreciente del docente, y silencio de los profesores. La presente investigación concluyó entre otras cosas, que existe la necesidad de conocer a profundidad los elementos concretos que envuelven las realidades de la profesión docente, evitando así la generación de concepciones epistemológicas que distorsionan las apreciaciones sobre esta labor. Además, resulta importante resaltar que, el aporte de la presente investigación radica en recoger de forma explícita las realidades de la profesión docente; haciendo la salvedad que en la literatura científica no se encuentra hasta el momento un estudio con estas características. Palabras Clave: profesión docente, educación, mitos docentes, realidades docentes, desafíos docentes