Emission of spacetime waves from the partial collapse of a compact object

In this work we describe the partial collapse of a compact object and the emission of spacetime waves as a result of back-reaction effects. As a source mass term we propose a non-smooth continuous function that describes a mass-loss, and we then obtain the solution of such setting. We present three distinct examples of the evolution of the norm $|R_{nl}(t,r_{*})|$ in terms of $t$, and four different results are shown for the parameter $l=1,2,5,10$; here $r_{*}$ is the fixed radius of an observer outside the compact object. In all cases, the decay behaviour is actually present at $t\gg 1$ and becomes more evident for larger $l$. In addition, for the results that have smaller $l$'s their amplitudes are larger when the asymptotic character of $|R_{nl}(t,r_{*})|$ clearly appears. Finally, the farther away an observer is set, the fewer oscillations are perceived; however, from our particular fixed set of parameters, the best spot to observe the wiggles of the emitted spacetime waves is close to $r_{*}\simeq \alpha$.Comment: 8 pages, 3 figure

El involucramiento parental como estrategia para lograr el rendimiento académico exitoso de los estudiantes de básica primaria en colombia.

Este documento presenta los resultados del trabajo de grado realizado en la modalidad de monografía bajo la asesoría de la doctora Gloria Alexandra Rivera, inscrito en la línea de investigación Infancia, Educación y Diversidad de la ECEDU. Describe la importancia del acompañamiento familiar en el rendimiento académico exitoso de los estudiantes de básica primaria en Colombia. Teniendo en cuenta que en el hoy por hoy, los niños y niñas se ven expuestos a adquirir conocimientos sin el debido acompañamiento de sus familias, posicionando esta problemática como una práctica peligrosa la cual pone en riesgo la integridad de los infantes. La metodología se llevó a cabo aplicando un estudio de enfoque cualitativo, descriptivo y con método bibliográfico mediante la consulta de diferentes fuentes de investigación con el cual se logra proponer una estrategia pedagógica que fomente y fortalezca la vinculación de padres de familia, educadores y estudiantes de básica primaria para lograr un desempeño académico exitoso. En primer lugar, se describe teóricamente los factores socioculturales, psicológicos, pedagógicos y la importancia del involucramiento parental que inciden en los procesos de enseñanza y aprendizaje de los estudiantes. Una segunda parte con referentes teóricos sobre la importancia del acompañamiento familiar en el rendimiento académico, seguido de un tercer apartado donde se reconocen las estrategias pedagógicas que contribuyen a mejorar este, bajo la orientación familiar.This document presents the results of the undergraduate work carried out in the monograph modality under the advice of Dr. Gloria Alexandra Rivera, enrolled in the research line Childhood, Education and Diversity of the ECEDU. Describes the importance of family support in the successful academic performance of elementary school students in Colombia. Taking into account that nowadays, boys and girls are exposed to acquire knowledge without due accompaniment from their families, positioning this problem as a dangerous practice which puts the integrity of infants at risk. The methodology was carried out by applying a study with a qualitative, descriptive approach, and with a bibliographic method, by consulting different research sources, with which it is possible to propose a pedagogical strategy that fosters and strengthens the involvement of parents, educators, and students of elementary basic to achieve a successful academic performance. Firstly, the sociocultural, psychological, pedagogical factors and the importance of parental involvement that affect the teaching and learning processes of students are theoretically described. A second part with theoretical references on the importance of family support in academic performance, followed by a third section where pedagogical strategies that contribute to improving this are recognized, under family guidanc

Obtención de bioetanol de segunda generación a partir del pericarpio de maracuyá (passiflora edulis f. flavicarpIa)

El presente trabajo de investigación se realizó en el Laboratorio Tecnológico de la Universidad de Cuenca, y tuvo como principal objetivo obtener bioetanol de segunda generación a partir del pericarpio de maracuyá (Passiflora edulis f. flavicarpia), mediante un proceso de hidrólisis con ácido sulfúrico diluido previo a la etapa de fermentación. De esta forma, se pretende presentar un biocombustible para el sector transporte como una alternativa energética. El proceso se llevo a cabo en tres etapas. La primera consintió en la caracterización química del pericarpio de maracuyá, el cual presenta un 48 % de holocelulosa. En una segunda etapa se realizó una hidrólisis ácida para la producción de azúcares fermentables. Para la evaluación del mejor proceso se empleo un diseño factorial 2^3, donde se controló los factores presión, tiempo y concentración de ácido sulfúrico. La respuesta se midió como concentración de azúcares reductores con el método espectrofotométrico de Somogyi-Nelson. Los resultados de este diseño factorial permitieron seleccionar la mejor combinación de los factores para maximizar el rendimiento de conversión: presión, 15 PSI; tiempo, 30 minutos; y concentración, 5 %. La máxima concentración de azúcares reductores alcanzada fue 9,82 ± 0,36 g/l. Finalmente, se llevó a cabo el proceso de fermentación en condiciones anaerobias, para lo cual se utilizó a la levadura Saccharomyces cerevisiae como microorganismo. Adicionalmente, se ajustaron los parámetros del proceso tales como: temperatura de crecimiento, 30 °C; pH, 4.5 y agitación orbital, 200 rpm. El rendimiento de conversión de pericarpio a bioetanol fue bajo, 0.35%.This research was made at the Cuenca University and its main objective was to get a second generation bioethanol from passion fruit (Passiflora edulis f. flavicarpia) pericarp. It was employed a hydrolysis process with dilute sulfuric acid. In this way, the purpose is to present a biofuel, which is an energetic alternative for the transport sector. The process was developed in three steps. First, its made the chemical characterization of passion fruit pericarp, which had 48 % of holocellulose. Second, its made the acid hydrolysis process to produce reducing sugars. For evaluation the better process, its employed a factorial design 2^3, where was controlled some factors such as: pressure, time, and acid sulfuric concentration. Besides, the answer was measured as sugars concentration with the Somogyi-Nelson spectrophotometric method. The results allowed to select the better factors configuration to maximize the conversión. The values are: 15 psi, 30 minutes and concentration of 5%. Finally, the glycosidic syrup was subjected to fermentation process anaerobically to the bioetanol production, for which it was used a yeast (Saccharomyces cerevisiae) as microorganism. In addition, fermentation parameters such as, growth temperature, pH and orbital agitation were adjusted. Whit these conditions the result was a low yield.Ingeniero QuímicoCuenc

Art therapy as a therapeutic resource integrated into Mental Health Programmes: Components, effects and integration pathways

To understand the effectiveness of art therapy within the framework of multidisciplinary therapeutic programs, it is essential to adopt a holistic perspective that allows for the description of effect relationships. Under this premise, and in the context of the work carried out in two Mental Health Day Hospitals in the Community of Madrid, a study has been conducted with the primary objective of identifying and analysing which conditions and/or therapeutic factors make art therapy an effective therapeutic resource. Semi-structured interviews including questions about key factors, therapeutic contributions and suggested improvements were administered to a total of 10 professionals, 5 from each hospital. The responses were recorded, transcribed, and thematically analysed. From the analysis of the interviews, 5 categories were identified: Common Factors, Specific Factors, Benefits to Patients, Contributions to Therapists and Improvements. The study concludes that art therapy is a practical and helpful treatment, particularly for narrative regulation and elaboration. It requires an interdisciplinary approach to fit into each patient’s treatment plan. Clinical debriefings with multidisciplinary clinicians have been effective and essentia

Design and Implementation of a Digital Bracelet to Regulate the Rhythm of the Heart

The aim of this present study is to help people suffering from cardiovascular diseases by designing and implementing a digital bracelet that allows keeping a record of cardiac behavior to generate a more optimal diagnosis of the patient's current state and the evolution of the heart rate of the same patient. The research used the evolutionary methodology. This methodology consisted of three stages: specification, development, and validation. In this study, 95% reliability was used. The results obtained with the present study were favorable. In addition, the digital bracelet has an important acceptance both in the patients and in the doctors who attended the people with cardiovascular disease

Marginal bone loss around implants placed in maxillary native bone or grafted sinuses: a retrospective cohort study

Objectives To assess differences in marginal bone loss around implants placed in maxillary pristine bone and implants placed following maxillary sinus augmentation over a period of 3 years after functional loading. Material and methods Two cohorts of subjects (Group 1: Subjects who received sinus augmentation with simultaneous implant placement; Group 2: Subjects who underwent conventional implant placement in posterior maxillary pristine bone) were included in this retrospective study. Radiographic marginal bone loss was measured around one implant per patient on digitized panoramic radiographs that were obtained at the time of prosthesis delivery (baseline) and 12, 24, and 36 months later. The influence of age, gender, smoking habits, history of periodontal disease, and type of prosthetic connection (internal or external) on marginal bone loss was analyzed in function of the type of osseous support (previously grafted or pristine). Results A total of 105 subjects were included in this study. Cumulative radiographic marginal bone loss ranged from 0 mm to 3.9 mm after 36 months of functional loading. There were statistically significant differences in marginal bone loss between implants placed in grafted and pristine bone at the 12‐month assessment, but not in the subsequent progression rate. External prosthetic connection, smoking, and history of periodontitis negatively influenced peri‐implant bone maintenance, regardless of the type of osseous substrate. Conclusions Implants placed in sites that received maxillary sinus augmentation exhibited more marginal bone loss than implants placed in pristine bone, although marginal bone loss mainly occurred during the first 12 months after functional loading. Implants with external implant connection were strongly associated with increased marginal bone loss overtime.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/102685/1/clr12122.pd

El estrés laboral en mujeres con trabajo nocturno: el caso de una industria maquiladora de Zapopan, Jalisco, México

Objective: To know the presence of work stress related to night work and its possible effect on health in a group of women workers in a manufacturing industry in the industrial zone of Zapopan, Jalisco.Methods: Through a qualitative-exploratory approach, using the technique of free listings for the collection of information, the presence of stress, and its possible relationship with night work is investigated.Results: Of the participants 18 they expressed feeling stress, and they attribute it to the lack of rest, not sleeping well, and being unveiled, in addition to pointing out that it has caused them diseases and diseases such as tic and tremoring, migraine, insomnia, the pain of head and neck, pressure problems, overweight, and colitis. In correlation to the most frequently mentioned words and related to the word “stress”, headache and despair stand out.Conclusions: Knowing a part of the reality lived by night shift workers, which according to literature working at night, impacts men and women in a similar way, we consider that in some ways the impact is stronger in women Because there is not a level of family responsibilities since they are the ones that accumulate this burden the most, it is urgent to consider and apply differentiated health and prevention programs to workers who take turns, but especially those who work at night.Objetivo: Conocer la presencia del estrés laboral relacionado con el trabajo nocturno y su posible efecto a la salud en un grupo de trabajadoras de una industria manufacturera de la zona industrial de Zapopan, Jalisco.Métodos: A través de un acercamiento cualitativo-exploratorio, utilizando la técnica de listados libres para la recolección de la información, se indagó sobre la presencia de estrés y su posible relación con el trabajo nocturno.Resultados: De las participantes, 18 manifestaron sentir estrés, y lo atribuyen a la falta de descanso, al no dormir bien y al estar desveladas, además de señalar que éste les ha provocado padecimientos y enfermedades como tic y temblorina, migraña, insomnio, dolor de cabeza y cuello, problemas de presión, sobrepeso y colitis. En correlación a las palabras más frecuentemente mencionadas y relacionadas con la palabra “estrés” se destaca el dolor de cabeza y la desesperación.Conclusiones: El conocer una parte de la realidad vivida por los trabajadoras del turno nocturno, que según la literatura el trabajar de noche, impacta de manera similar tanto a hombres como a mujeres, nosotros consideramos que en cierta manera el impacto es más fuerte en mujeres por no haber un nivel de las responsabilidades familiares, siendo ellas las que acumulan más esta carga, es urgente considerar y aplicar programas de salud y prevención diferenciados a trabajadores y trabajadoras que rolan turnos, pero sobre todo de aquellos que trabajan de noche

Satisfacción del cliente en restaurantes de tipo fast food- Jesús María, 2021

Nuestro Informe investigativo tiene como objetivo general Determinar el nivel en relación a la satisfacción del cliente en restaurantes de tipo Fast food - Jesús María, 2021.En cuanto la metodología, tipo aplicado descriptivo simple con enfoque cuantitativo de nivel descriptivo, diseño no experimental de corte transversal. La muestra fue de 357 cliente en restaurantes de tipo Fast food, tipo de muestreo fue Probabilístico. El resultado obtenido para el nivel de satisfacción del cliente por parte de los comensales fue alto, puesto que el 65,1% casi siempre siente su Fiabilidad con respecto al restaurante de tipo Fast food, mientras que, Elementos tangibles el 54,5% de los ciudadanos Siempre confían en los elementos tangibles de los restaurantes de Fast food, del mismo modo para la dimensión de Seguridad el 70,7% de los ciudadanos siempre confían en la seguridad de los restaurantes de Fast food, por otro lado, en capacidad de respuesta el 49,7% de los ciudadanos se encuentran satisfechos con respecto a la capacidad de respuesta del restaurante de tipo Fast food y por último la dimensión Empatía el 70,7% siempre se sienten conforme con respecto a la empatía en los restaurantes de tipo Fast food . Así mismo, se concluye que efectivamente el nivel de satisfacción del cliente en restaurantes de tipo Fast food, es alto, puesto que el establecimiento presenta un nivel alto en cada una de las dimensiones; sin embargo, aún se debe reforzar algunos aspectos para los cuales es necesario recurrir a estrategias, ya que estas ayudarán con la calidad de servicio que merece el cliente

Governance in the Higher education system

Organizational governance refers to the guidelines or methods under which the behavior and subsequent management of those who run the organization unfolds; the mechanisms used to establish relations with their internal and external stakeholders or interest groups, where each decision they make, or that the organization makes about them, will define roles, influences, grant powers and affect the parties involved. which will end up facilitating or not the fulfillment of organizational objectives. Understanding Higher Education Institutions (HEIs) as organizations, the concept of governance is fully applicable to them.http://unidadinvestigacion.usta.edu.c