On-line Ramsey numbers of paths and cycles

Consider a game played on the edge set of the infinite clique by two players, Builder and Painter. In each round, Builder chooses an edge and Painter colours it red or blue. Builder wins by creating either a red copy of $G$ or a blue copy of $H$ for some fixed graphs $G$ and $H$. The minimum number of rounds within which Builder can win, assuming both players play perfectly, is the on-line Ramsey number $\tilde{r}(G,H)$. In this paper, we consider the case where $G$ is a path $P_k$. We prove that $\tilde{r}(P_3, P_{\ell+1}) = \lceil 5\ell/4 \rceil = \tilde{r}(P_3, C_\ell)$ for all $\ell \ge 5$, and determine $\tilde{r}(P_4, P_{\ell+1}$) up to an additive constant for all $\ell \ge 3$. We also prove some general lower bounds for on-line Ramsey numbers of the form $\tilde{r}(P_{k+1},H)$.Comment: Preprin

Incidencia de la separación convencional y divorcio ulterior en sede municipal y notarial. En el número de procesos similares tramitados en sede judicial. Trujillo 2014 - 2015

El tema de la presente tesis está referido a la incidencia de la Separación Convencional y Divorcio Ulterior en sede Municipal y Notarial, en el número de procesos similares tramitados en sede Judicial en Trujillo en el periodo 2014 2015, y en ese sentido brindo resultados que al tramitarse dichos procedimientos en sede Notarial y/o Municipal ha disminuido considerablemente la carga procesal en el Poder Judicial de los trámites mencionados. Asimismo, se ha creído conveniente presentar un análisis de la manera como ha venido evolucionando en el Perú el tratamiento legal a los procedimientos de separación convencional y divorcio ulterior. Es por ello que el problema de la presente investigación se ha planteado de la siguiente forma: ¿De qué manera la separación convencional y divorcio ulterior en sede municipal y notarial incide en el número de procesos similares en sede judicial 2014- 2015? Asimismo como respuesta a dicho problema se ha planteado la siguiente hipótesis: La separación convencional y el divorcio ulterior en sede municipal y notarial incidió disminuyendo significativamente el número de los procesos similares tramitados en sede judicial Trujillo. 2014-2015. También se ha planteado como objetivo general: Determinar si la separación convencional y divorcio ulterior en sede municipal y notarial incide en la disminución del número de procesos similares tramitados en sede judicial. Trujillo 2014- 2015. En cuanto al desarrollo del presente trabajo, se lo ha estructurado en siete capítulos, siendo el primero Introducción, donde describimos el planteamiento del problema, enunciado del problema, hipótesis, objetivos y variables; el segundo es el Marco Teórico, que a su vez se subdivide en tres subcapítulos, siendo el primero la familia, el segundo trata acerca del Divorcio y el tercero que analiza el Proceso de Divorcio Ulterior en el Perú; el capítulo tercero corresponde a la Metodología; por su parte el capítulo cuarto corresponde a Resultados; asimismo el capítulo quinto contiene la Discusión de resultados; el capítulo sexto contiene las Conclusiones a las que hemos llegado con la realización de este estudio; y finalmente, el capítulo sétimo recoge las Recomendaciones que creo convenientes para un mejor trámite del proceso de separación convencional y divorcio ulterior en sede notarial y/o municipal.The subject of this thesis is based on the incidence of Conventional separation and subsequent divorce in Municipal and Notarial based on the number of similar proceedings conducted in court in Trujillo in the period 2014 -2015, and in that sense I offer results the processed such procedures in Notarial headquarters and / or Municipal has significantly decreased the procedural burden on the Judiciary of the aforementioned procedures. It has also seen fit to present an analysis of the way it has been evolving in Peru the legal treatment procedures conventional separation and subsequent divorce. That is why the problem of this research has been raised as follows: How conventional separation and subsequent divorce in the municipal and notarial office affects the number of similar processes in court 2014- 2015? Also in response to this problem it has raised the following hypothesis: Conventional separation and subsequent divorce attorney based in the city and had a significant impact by decreasing the number of similar proceedings conducted in court Trujillo. 2014-2015. It has also been proposed as general objective: To determine whether conventional separation and subsequent divorce attorney in town and headquarters affects the decrease in the number of similar proceedings conducted in court. Trujillo 2014- 2015. Regarding the development of this work, it has been structured into seven chapters, the first introduction, where we describe the problem statement, statement of the problem, hypothesis, objectives and variables; the second is the theoretical framework, which in turn is subdivided into three subchapters, the first family, the second is about the divorce and the third analyzes the process subsequent divorce in Peru; the third chapter corresponds to the Methodology; meanwhile the fourth chapter corresponds to results; The fifth chapter also contains the discussion of results; the sixth chapter contains the conclusions we have reached with the completion of this study; and finally, the seventh chapter contains the recommendations that I think suitable for better processing of the conventional separation and subsequent divorce attorney based and / or municipal.Tesi

Use of drones in offshore wind farm inspections

Abstract: With the increase in global investments in offshore wind energy and the rapid implementation of wind technologies in hazardous deep water environments, operational inspection of wind turbines and related infrastructure plays an important role in the safe and efficient operation of offshore wind farms. In recent years, much attention has been paid to the use of unmanned aerial vehicles (UAVs) and remotely piloted unmanned aerial vehicles (RPAs) commonly referred to as "drones" for remote inspection of renewable energy infrastructure, i.e. photovoltaic farms and onshore wind farms. Drones have significant potential also in in offshore wind energy. Inspection with drones allows for to reduce not only the number of flight operations (involvement of aircraft and flight crews) and the transport of personnel carrying out the maintenance and repair of offshore wind turbines. With drones is possible carry the equipment transported for hazardous inspection work. The involvement of UAVs also reduces the plant downtime needed to detect faults and collect diagnostic information from the entire wind farm. The benefits of inspection technology in the offshore wind energy industry based on drones are confirmed by the previous tests, and the prospect of offshore energy development encourages further work with the use of UAVs. At the same time, it should be borne in mind that any unexpected failure of the drone system during its mission may interrupt control works (during inspections), and thus reduce the electricity generated by wind turbines. The article presents the potential of drones in the process of inspecting wind farms, including offshore wind farms, presents examples of UAV models used for inspections, indicates methods of conducting inspections with the use of drones and highlights a significant reduction in the costs of the operation of offshore wind farms as a result of limiting the use of manned aviation (helicopters and flight crews) and the elimination of the risk associated with the involvement of personnel to perform inspections of wind farms at sea. The potential of unmanned floating platforms as part of cooperation with UAV in the process of inspecting offshore wind farms was also indicated. Keywords: wind energy, offshore, drones, wind farms, drone inspections, maritime inspections, marine aviation, offshore, offshore wind energy, safety air operations, risk analysi

Estilos de aprendizaje y su influencia en la comprensión lectora de los estudiantes en una universidad privada de Trujillo, 2020

La presente investigación basada en la teoría comunicacional, se realizó con el propósito de determinar la influencia de los estilos de aprendizaje en la comprensión lectora de los estudiantes en una universidad privada de Trujillo, 2020. En esta investigación de tipo no experimental con diseño correlacional causal se aplicó dos cuestionarios validados y con confiabilidad 0,882 y 0,840 según el coeficiente alfa de Cronbach, respectivamente. La muestra no probabilística estuvo conformada por 103 estudiantes de una universidad privada. Los resultados en la variable Estilos de aprendizaje estuvo representado por el 58.3% en preferencia moderada y 39.8% con preferencia alta. En cuanto a la comprensión lectora estuvo representado por el 72.8% con nivel medio y 18.4% con nivel alto. En conclusión, los estilos de aprendizaje y la comprensión lectora se asocian fuertemente mediante el 48.54% con preferencia moderada en estilos de aprendizaje lo que origina que se encuentren en comprensión lectora media cuyo coeficiente Rho de Spearman es igual a 0,709; es decir correlación alta

Thromboprophylaxis in atrial fibrillation: correct interpretation and effective use of CHA2DS2-VASc and HAS-BLED scores

Thromboprophylaxis is one of the most important aspects of atrial fibrillation (AF) management as irregular atrial contractions foster formation of blood clots that may result in ischemic stroke. Strokes caused by AF are relatively large and often lead to death or sever disability, but they may be avoided with appropriate anticoagulation therapy. Unfortunately, the risk factors for stroke overlap with risk factors for bleeding, creating a genuine challenge for clinicians seeking to strike a balance in preventing these two types of complications. This is why risk assessment scores CHA2DS2-VASc and HAS-BLED have been developed. While their role to optimize the anticoagulation therapy was confirmed in multiple studies, the misinterpretation of the criteria within these scores and their inappropriate application can result in suboptimal treatment and needlessly expose patients to the risk of stroke, hemorrhage, or both. This review aims to present appropriate interpretation of CHA2DS2-VASc and HAS-BLED scores and discuss how anticoagulation therapy of AF patients should be guided by those two scores