An experimental and simulation study of the role of thermal effects on variability in TiN/Ti/HfO2/W resistive switching nonlinear devices

An in-depth simulation and experimental study has been performed to analyze thermal effects on the variability of resistive memories. Kinetic Monte Carlo (kMC) simulations, that reproduce well the nonlinearity and stochasticity of resistive switching devices, have been employed to explain the experimental results. The series resistance and the transition voltages and currents have been extracted from devices based on the TiN/Ti/HfO2/W stack we have fabricated and measured at temperatures ranging from 77 K to 350 K. We observed that the variability for all the magnitudes analyzed was much higher at low temperatures. In the kMC simulations, we obtained conductive filaments (CFs) with less compactness at low temperatures. This led us to explain the higher variability, based on the variations of the CF morphology and density seen at low temperatures

The Game at the Green Chapel: A Game-Oriented Perspective on Chivalry in Sir Gawain and the Green Knight

Like many things in life, the very idea of a game contradicts itself. A game is so many conflicting things at once. All in good fun, but with the focused goal of winning. A closed space with no consequences, yet personally affecting outside its boundaries. Often playful, yet deathly serious. The games we make and play often have a hand in deciding our identities. What kinds of games do we play, and how often? Who do we play them with? How seriously do we take them, and how do we react to certain outcomes? Do we learn from our mistakes and improve, or are we sore losers who quit at the earliest opportunity? Our complex relationships to games, which by definition are not for practical purposes, can change how we perceive our worlds and how people perceive us.The contradictory nature of the game is not a new concept. Sir Gawain and the Green Knight, a fourteenth-century English chivalric romance, is married to the idea of games as a central nucleus. Games clutch the plot from the beginning of the story, when a mysterious and towering knight, fully clad in marvelous green armor, rides to King Arthur’s court and challenges Sir Gawain to what has come to be known as the beheading game. The rules are simple: one participant will take an axe and strike the other in any way they so choose. Exactly one year later, in return, the one who struck must offer himself to be dealt a blow from the opposite party.Gawain goes first. With a mighty cleave of the Green Knight’s axe, he chops his opponent’s head clean off. It rolls onto the floor in the middle of their holiday celebration. There is no way a dead man could possibly deal a blow in return a year later. But of course, the Green Knight is not dead. His body strolls across the room, picks its head back up, and urges Gawain to hold up his end of the bargain a year later.The honorable Gawain, facing death in a year’s time, opts not to back out of his promise to play the game. His following journey is steeped in play, from the beheading game to the exchanges game to even smaller forms of play that the story is preoccupied with. With each game comes a slew of contradictions and confusing-yet-clear events and descriptions. How can a reading of Sir Gawain and the Green Knight from a game-oriented perspective lead us to new conclusions about the very concept of the game in general? These are the ideas that my senior project explores

La relación de confianza entre profesor y alumno, ¿mejora la motivación y los resultados?

Nuestro trabajo analiza el efecto que sobre la motivación de los estudiantes tiene la relación de confianza tanto personal como académica entre el profesor y el estudiante así como la percepción que éste tiene de su desempeño. Para ello hemos utilizado una encuesta on line en la que pedimos a los estudiantes universitarios que evalúen a sus profesores como un todo usando una escala de Likert. Las variables independientes fueron la confianza académica y la confianza personal, mientras que las variables dependientes fueron la motivación y el desempeño percibido. Los resultados mostraron una correlación positiva entre la confianza tanto académica como personal en relación con la motivación y el rendimiento percibido. Las ramificaciones de nuestro estudio sobre investigaciones futuras impulsan la idea de que la confianza debe ser vista desde diferentes perspectivas y que es una parte implícita de las habilidades de enseñanza.Our study takes into account the way in which both academic and personal trust has an effect on the motivation of students and their perceived performance. To do this we sent an online survey in which we asked higher education students to evaluate their professors as a whole using a Likert scale. The independent variables were academic trust and personal trust, whilst the dependent variables were motivation and perceived performance. The results showed a positive correlation between academic trust and motivation, as well as with perceived performance. The same result was achieved when studying personal trust in regards to motivation and perceived performance. This implies that there is an important positive relationship between trust and the general performance of students in class. The ramifications of our study on future research push for the idea that trust must be seen from differing perspectives, and that it is an implicit part of teaching skills

Composition and function of P bodies in Arabidopsis thaliana

"mRNA accumulation is tightly regulated by diverse molecular pathways. The identification and characterization of enzymes and regulatory proteins involved in controlling the fate of mRNA offers the possibility to broaden our understanding of posttranscriptional gene regulation. Processing bodies (P bodies, PB) are cytoplasmic protein complexes involved in degradation and translational arrest of mRNA. Composition and dynamics of these subcellular structures have been studied in animal systems, yeasts and in the model plant Arabidopsis. Their assembly implies the aggregation of specific factors related to decapping, deadenylation, and exoribonucleases that operate synchronously to regulate certain mRNA targets during development and adaptation to stress. Although the general function of PB along with the flow of genetic information is understood, several questions still remain open. This review summarizes data on the composition, potential molecular roles, and biological significance of PB and potentially related proteins in Arabidopsis.

Objetivos del cine latinoamericano para su exportación = Objectives of latin american cinema for export

El presente documento tiene como finalidad mostrar el potencial que tienen las OPC latinoamericanas, particularmente las colombianas, argentinas y mexicanas para producir películas comercializables en mercados internacionales. Se estudian los valores económicos, estéticos y culturales inherentes a una película. Analiza los objetivos de producción y comercialización en materia de búsqueda de mercados mundiales, paradigmas cinematográficos, visión de negocios y benchmarking, entre otros. Recopila principios de marketing a implementar como el poder que tienen los espectadores, en cuanto a compra y producción así como en la propuesta de valor. Se efectúan recomendaciones para aumentar el negocio del cine. Se estudian los factores causales de éxito comercial para las OPC latinoamericanas como los estímulos fiscales, el papel de la prensa, la inclusión de elementos narrativos atractivos y la reducción de costos de producción. Abstract: This document’s main purpose is to set the potential of Latin American OPC, particularly Colombian, Argentine and Mexican, to produce commercial films for international markets. Economic, aesthetic and cultural values inherent in a film are studied. It analyzes production and marketing targets like: searching worldwide markets, film paradigms, business vision and benchmarking, among others. It collects marketing principles to be implemented as: the power that spectators regards in ticket consumption and film production as well as the value proposition. Recommendations are made to increase the film business. The causal factors for commercial success to Latin American OPC as fiscal stimuli, the role of the press, the inclusion of narrative elements and the costs reduction, are studied

El yo deteriorado: estigma y adicción en la sociedad del consumo

El objetivo del artículo es mostrar la situación social de los internos en una casa de recuperación para adictos, considerando a los grupos de Alcohólicos Anónimos 24 Horas en México como instituciones totales desde la perspectiva del Interaccionismo Simbólico, aplicando la propuesta teorética de Erving Goffman. Metodológicamente realizamos un estudio microsociológico con un trabajo de campo en las casas de recuperación , explicando la función que cumplen los mecanismos de control social, así como los dispositivos de vigilancia, el lenguaje y las prácticas discursivas, utilizados para modificar el Yo del adicto. Además, describimos la práctica de las influencias religiosas y los elementos del psicoanálisis que estas comunidades consideran para la consolidación de su programa de recuperación

¿Qué es el Síndrome Lozano Barragán en las Organizaciones de Producción Cinematográficas?

El presente artículo de investigación plantea la misión de las Organizaciones de Producción Cinematográficas como empresas lucrativas. Se mencionan los tipos de valores que los directores y productores generan, principalmente los valores económicos y los valores estéticos. Se define el Síndrome Lozano-Barragán como defecto de las OPC si anteponen los tintes artísticos de sus cineastas sin considerar los deseos y necesidades de los espectadores. Se proponen estrategias para alejar a las compañías cinematográficas del SLB. Se exponen las actividades que realiza un productor como principal responsable del éxito o fracaso, tanto artístico como financiero, de las OPC. Se agregan sugerencias para balancear los valores económicos y estéticos en las producciones

Toll-Like Receptors and Natural Killer Cells

Natural killer (NK) cells represent a heterogeneous subpopulation of lymphocytes of the innate immune system with a powerful antitumor activity, a function given by a complex collection of receptors. They act synergistically to recognize, regulate, or amplify the response according to the microenvironment, thus highlighting Toll-like receptors (TLRs), a type of receptors that allows sensing evolutionarily molecules conserved of pathogens known as pathogen-associated molecular patterns (PAMPs) and/or damage-associated molecular patterns (DAMPs). Those TLRs are essential to start the immune response. There is little information about the different subpopulations that form NK cells as well as their expression profile of innate immune response receptors in hematological cancers

Cyclins A and B associate with chromatin and the polar regions of spindles, respectively, and do not undergo complete degradation at anaphase in syncytial Drosophila embryos

Maternally contributed cyclin A and B proteins are initially distributed uniformly throughout the syncytial Drosophila embryo. As dividing nuclei migrate to the cortex of the embryo, the A and B cyclins become concentrated in surface layers extending to depths of approximately 30-40 microns and 5-10 microns, respectively. The initiation of nuclear envelope breakdown, spindle formation, and the initial congression of the centromeric regions of the chromosomes onto the metaphase plate all take place within the surface layer occupied by cyclin B on the apical side of the blastoderm nuclei. Cyclin B is seen mainly, but not exclusively, in the vicinity of microtubules throughout the mitotic cycle. It is most conspicuous around the centrosomes. Cyclin A is present at its highest concentrations throughout the cytoplasm during the interphase periods of the blastoderm cycles, although weak punctate staining can also be detected in the nucleus. It associates with the condensing chromosomes during prophase, segregates into daughter nuclei in association with chromosomes during anaphase, to redistribute into the cytoplasm after telophase. In contrast to the cycles following cellularization, neither cyclin is completely degraded upon the metaphase-anaphase transition

Cyclins A and B associate with chromatin and the polar regions of spindles, respectively, and do not undergo complete degradation at anaphase in syncytial Drosophila embryos

Maternally contributed cyclin A and B proteins are initially distributed uniformly throughout the syncytial Drosophila embryo. As dividing nuclei migrate to the cortex of the embryo, the A and B cyclins become concentrated in surface layers extending to depths of approximately 30-40 microns and 5-10 microns, respectively. The initiation of nuclear envelope breakdown, spindle formation, and the initial congression of the centromeric regions of the chromosomes onto the metaphase plate all take place within the surface layer occupied by cyclin B on the apical side of the blastoderm nuclei. Cyclin B is seen mainly, but not exclusively, in the vicinity of microtubules throughout the mitotic cycle. It is most conspicuous around the centrosomes. Cyclin A is present at its highest concentrations throughout the cytoplasm during the interphase periods of the blastoderm cycles, although weak punctate staining can also be detected in the nucleus. It associates with the condensing chromosomes during prophase, segregates into daughter nuclei in association with chromosomes during anaphase, to redistribute into the cytoplasm after telophase. In contrast to the cycles following cellularization, neither cyclin is completely degraded upon the metaphase-anaphase transition