Andrología e inseminación artificial

Calificación de la aptitud reproductiva del toro 5; ii. Pubertad del macho bovino 7; iii. Organos reproductivos del toro 9; 3.1 Examen morfológico de los órganos genitales 10; 3.2 Perímetro escrotal 11; iv. Examen biológico del semen 13; v. Patologías testiculares hereditarias 16; vi. Patologías adquiridas de origen inflamatorio 18; vii. Degeneración testicular (basado en roberts) 20; viii. Patologías a nivel de epidídimo 24; ix. Patologías de glándulas vesiculares 28; x. Alteración de la próstata 30; xi. Patologías del prepucio 31; xii. Patologias penianas 32; xiii. Lugar de depósito del semen según especie 35; xiv. Comportamiento sexual del toro 39; xv. Patologías hereditarias 42; xvi. Formulación de un diagnóstico andrológico 46; xvii. Bases de la conservación de semen bovino 48; xviii. Inseminación artificial de la vaca con semen congelado bovino 53; xix. Comparación de la fertilidad de semen bovino con y sin adición de antibióticos 61; xx. Trastornos del ciclo y ovario en la vaca 64; xxi. Criterios genéticos para la selección de toros para lecheria 67; xxii. criterios genéticos para la selección de vacas y vaquillas de lechería 68; xxiii. Biotecnología en reproducción animal 69; xxiv. Manejo reproductivo del rebaño bovino con énfasis en brucelosis bovina 76; xxv. Calificación de la condición corporal en el ganado lechero 84; xxxvi. Análisis de un programa de salud reproductiva en la produccion de vacas lecheras en la provincial de llanquihue 85; conclusiones 88; Bibliografía 8

The Effect of the Buffer Size in QoS for Multimedia and bursty Traffic: When an Upgrade Becomes a Downgrade

This work presents an analysis of the buffer features of an access router, especially the size, the impact on delay and the packet loss rate. In particular, we study how these features can affect the Quality of Service (QoS) of multimedia applications when generating traffic bursts in local networks. First, we show how in a typical SME (Small and Medium Enterprise) network in which several multimedia flows (VoIP, videoconferencing and video surveillance) share access, the upgrade of the bandwidth of the internal network may cause the appearance of a significant amount of packet loss caused by buffer overflow. Secondly, the study shows that the bursty nature of the traffic in some applications traffic (video surveillance) may impair their QoS and that of other services (VoIP and videoconferencing), especially when a certain number of bursts overlap. Various tests have been developed with the aim of characterizing the problems that may appear when network capacity is increased in these scenarios. In some cases, especially when applications generating bursty traffic are present, increasing the network speed may lead to a deterioration in the quality. It has been found that the cause of this quality degradation is buffer overflow, which depends on the bandwidth relationship between the access and the internal networks. Besides, it has been necessary to describe the packet loss distribution by means of a histogram since, although most of the communications present good QoS results, a few of them have worse outcomes. Finally, in order to complete the study we present the MOS results for VoIP calculated from the delay and packet loss rate

Variscan deformation of the Hesperian massif in the Lousã mountain range (central Portugal)

[Abstract] The occidental region of the Central-Iberian Zone of the Variscan Iberian massif, in the central part of Portugal (Lousã mountain range), has a Variscan tectonostructural organization as the one recognized in the occidental border of the massif, in the Porto-Coimbra-Tomar shear zone. In the Iberian massif we can observe neo-proterozoic metasediments of the “Complexo Xisto-Grauváquico”, and important metasedimentary outcrops of Late Palaeozoic (Ordovician, Silurian and lower Devonian) rocks. Both are affected by the first regional variscan deformation phase (FH1), and later refolded by the second variscan deformation phase (FH2). This second regional variscan phase has a penetrative effect in the massif and develops a dextral, north-south, strike-slip faulting, associated with transpressive kinematic deformation (like a Riedel model) similar to the Porto-Coimbra-Tomar shear zone. Some geological examples observed and studied in the Lousã region are showed and discussed

Social Media Use and Its Association with Mental Health and Internet Addiction among Portuguese Higher Education Students during COVID-19 Confinement

The use of social media was one of the most common way to keep in touch with friends and family during confinement. For higher education students, the fact that their universities were closed was a major change in their lives. The aim of this study is to relate the prevalence and type of social media with Internet addiction and mental health of university students in a district of Portugal during COVID-19 confinement. Mental health was studied by applying the reduced version of the Mental Health Inventory (MHI-5) and to measure the Internet use and dependence, the Internet Addiction Test (IAT) was used. The study (cross-sectional, descriptive, and correlational) used an online questionnaire, conducted on Google® Forms and the link was sent to 4450 students, in the months of April to June 2020, during the confinement. A total of 329 valid questionnaires were obtained. We can conclude that regarding mental health, students in the 18–24 age group, single or divorced and who are not in a relationship, and with worse academic results, show worse levels of mental health. It is noteworthy that the students with the same characteristics also have the highest levels of addiction to internet

A Relevância e as Competências das Estruturas de Gestão Intermédia: os coordenadores de departamento

Dada a concentração e profusão das responsabilidades do director escolar, verificámos a tendência de relevar a importância das estruturas de gestão intermédia das escolas na acção a ter no prosseguimento dos ideais educativos. Dos órgãos de gestão intermédia da estrutura hierárquica da escola o que mereceu a nossa atenção foi o departamento curricular representado pelo respectivo coordenador, pelo facto do Decreto-Lei n.º 75/2008, de 22 de Abril, o considerar a principal estrutura de coordenação e supervisão pedagógica. Por esta razão, o coordenador de departamento é considerado o impulsionador do trabalho que é realizado pelos outros dentro do mesmo grupo de acção, influindo na determinação de procedimentos com vista ao alcance dos objectivos organizacionais. Consequentemente e segundo o que está previsto na lei e na análise documental orientámos este estudo a partir das seguintes questões: será que os coordenadores de departamento conhecem, cumprem e obedecem com as competências e funções que lhe são atribuídas? Será que eles induzem competências de liderança e de mediação? Para podermos analisar e concluir relações no âmbito da investigação que nos propusemos efectuar, nomeadamente o papel e as funções do coordenador de departamento e a relação da sua função com os parâmetros afectos à liderança e mediação – que são os objectivos mais gerais deste estudo – efectuámos um trabalho de pesquisa descritiva conduzido por um inquérito, realizado por uma entrevista. Esta foi feita aos coordenadores de departamento de uma escola secundária, optando, portanto, por um estudo de caso. Para evidenciar empiricamente os elementos significativos recolhidos pela análise que fizemos ao conteúdo das entrevistas optamos pela sua sistematização racional agrupada em categorias. Deste estudo pudemos concluir que, neste caso concreto, os coordenadores de departamento não mostram capacidade de resiliência ao determinado nos diplomas legais e no que os teóricos aludem, descentrando-a para os responsáveis das áreas de recrutamento disciplinar. ### ABSTRACT Given the concentration and abundance of the school principal’s responsibilities, we have noticed a tendency to value the importance of the middle management school structures in the development and pursuit of the educational ideals. From all the middle management bodies of the hierarchical structure of schools, what dove our attention was the academic department represented by its head, once the Decreto-Lei nº 75/2008, 22nd April, considers it the leading structure in pedagogical coordination and supervision. This being so, the head of department is seen as the driving force of the work that is done by all the other members of the same group of action, influencing in the decision making concerning the proceedings that are to agree with the organizational objectives. As a consequence, and according to what is stated in the law and in the document analysis, we have led this study starting with the questions: do the heads of department know, fulfill and obey the competencies and functions they have been attributed? Do they show leading and mediation skills? In order to analyze and draw conclusions about established relations in the field of the investigation we have set ourselves upon, namely the role and the functions of the head of department and the relation of their function with the standards concerning leadership and mediation - which are the most general objectives of this study – we have made a work of descriptive research through an inquiry by means of an interview, which was made to the heads of department of a secondary school. We have thus opted for a case study. To empirically emphasize the most significant elements that we have gotten through the analysis we have made of the contents of the interviews, we have opted for a rational systematization grouped into categories. From this study we can conclude that, in this particular case, the heads of department don’t seem to be resilient to the contents of the legislative enactments and the existing theories, delivering it to the ones who are responsible for the school recruitment areas. Keywords: Education; leadership; school mediation; middle management structures; heads of department

Journeys of Portuguese athletes to sporting success: the peaks and troughs

This research examined the experiences of eight Portuguese (former) elite athletes from a social scientific perspective. In so doing it attempted to move away from the tentacles of achievement sport and, in particular, the performance efficiency model that dominates elite sport. Rather, it focused on the subjective and qualitative experiences of sportspeople themselves and gave them a forum to reflect upon the primary socializing agents that played a key role in their sporting success, and on the peaks and troughs on their journeys to sporting success, nationally and internationally. The research design included semi-structured interviews with athletes that excelled in athletics, handball, gymnastics, korfball and swimming. All eight had achieved outstanding results nationally and internationally. A qualitative approach was adopted for data collection and analysis. Giving voice to the former athletes themselves revealed much about: the primary socializing agents for sport in their lives, as young, teenage and adult athletes; those role models and mentors that influenced their initial and ongoing involvement and specialization in sport, these being the family (usually parents), physical education teachers and peers; and, finally, the peaks and troughs in their careers which usually hinged around sporting success or defeat, failure to achieve expected results, and the onset and impact of injury. Taken together, these findings reverberate with those of other researchers beyond the Lusophone world. They also indicate the emergence and development of a sports ethic in Portugal despite the comparatively late entry of that country into the global sporting arms race.info:eu-repo/semantics/publishedVersio