Interfacial-Redox-Induced Tuning of Superconductivity in YBa2Cu3O7-δ.

Solid-state ionic approaches for modifying ion distributions in getter/oxide heterostructures offer exciting potentials to control material properties. Here, we report a simple, scalable approach allowing for manipulation of the superconducting transition in optimally doped YBa2Cu3O7-δ (YBCO) films via a chemically driven ionic migration mechanism. Using a thin Gd capping layer of up to 20 nm deposited onto 100 nm thick epitaxial YBCO films, oxygen is found to leach from deep within the YBCO. Progressive reduction of the superconducting transition is observed, with complete suppression possible for a sufficiently thick Gd layer. These effects arise from the combined impact of redox-driven electron doping and modification of the YBCO microstructure due to oxygen migration and depletion. This work demonstrates an effective step toward total ionic tuning of superconductivity in oxides, an interface-induced effect that goes well into the quasi-bulk regime, opening-up possibilities for electric field manipulation

Transmission electron microscopy study of vertical quantum dots molecules grown by droplet epitaxy

3 páginas, 3 figuras.-- Progress in Applied Surface, Interface and Thin Film Science - SURFINT SREN II.-- PACS codes: 68.37.Lp; 81.05.Ea; 81.15.HiThe compositional distribution of InAs quantum dots grown by molecular beam epitaxy on GaAs capped InAs quantum dots has been studied in this work. Upper quantum dots are nucleated preferentially on top of the quantum dots underneath, which have been nucleated by droplet epitaxy. The growth process of these nanostructures, which are usually called as quantum dots molecules, has been explained. In order to understand this growth process, the analysis of the strain has been carried out from a 3D model of the nanostructure built from transmission electron microscopy images sensitive to the composition.This work was supported by the Spanish MCI (TEC2008-06756-C03-02/TEC), CONSOLIDER CSD2009-00013, and the Junta de Andalucia (PAI research groups TEP-120 and TIC-145, project P08-TEP-03516).Peer reviewe

Fail-aware LIDAR-based odometry for autonomous vehicles

Autonomous driving systems are set to become a reality in transport systems and, so, maximum acceptance is being sought among users. Currently, the most advanced architectures require driver intervention when functional system failures or critical sensor operations take place, presenting problems related to driver state, distractions, fatigue, and other factors that prevent safe control. Therefore, this work presents a redundant, accurate, robust, and scalable LiDAR odometry system with fail-aware system features that can allow other systems to perform a safe stop manoeuvre without driver mediation. All odometry systems have drift error, making it difficult to use them for localisation tasks over extended periods. For this reason, the paper presents an accurate LiDAR odometry system with a fail-aware indicator. This indicator estimates a time window in which the system manages the localisation tasks appropriately. The odometry error is minimised by applying a dynamic 6-DoF model and fusing measures based on the Iterative Closest Points (ICP), environment feature extraction, and Singular Value Decomposition (SVD) methods. The obtained results are promising for two reasons: First, in the KITTI odometry data set, the ranking achieved by the proposed method is twelfth, considering only LiDAR-based methods, where its translation and rotation errors are 1.00% and 0.0041 deg/m, respectively. Second, the encouraging results of the fail-aware indicator demonstrate the safety of the proposed LiDAR odometry system. The results depict that, in order to achieve an accurate odometry system, complex models and measurement fusion techniques must be used to improve its behaviour. Furthermore, if an odometry system is to be used for redundant localisation features, it must integrate a fail-aware indicator for use in a safe manner

Profiles of lateral violence in nursing personnel of the Spanish public health system

Background Workplace violence in healthcare settings has long been studied in scientific literature, particularly in the nursing profession. Research has explored mostly user violence probably for its high prevalence and impact on health and job satisfaction. Yet this focus may overshadow another dangerous type of workplace violence: coworker violence. Exerted by co-workers with similar status, lateral violence differs from that yielded by a co-worker with a higher rank, known as vertical. This study aims to deepen the knowledge about lateral violence perceived by nurses and its interaction with other variables commonly associated with workplace violence in healthcare: burnout, job satisfaction, and self-perceived health. Method A random block sampling was performed, prompting a total sample of 925 nursing professionals from 13 public hospitals located in the southeast of Spain. The sample distribution (mean and standard deviation) and the response percentages according to the study variables of the ad-hoc questionnaire were analyzed and classified with cluster analysis. Results Through the cluster analysis, two subgroups were obtained: Cluster 1, composed of 779 participants, with low scores in the variables used for the classification, high levels of both extrinsic and intrinsic satisfaction, low levels of emotional exhaustion and cynicism, and low rates of somatization, anxiety, social dysfunction and depression; and Cluster 2, composed of 115 participants and characterized by moderate-high scores in the variables used for the classification, moderate extrinsic satisfaction, and low intrinsic satisfaction, high emotional exhaustion and cynicism and lower somatization, anxiety, social dysfunction, and depression scores. Excluded cases amounted to 31. Conclusion Nursing professionals who experience lateral violence reveal a lower intrinsic satisfaction, feeling less self-accomplished in their job, and less positive work experience. Emotional exhaustion rises as a concerning progressive and long-term outcome of experiencing this type of violence

Electrical properties of biomorphic SiC ceramics and SiC/Si composites fabricated from medium density fiberboard

A study has been made of the dependences of the electrical resistivity and the Hall coefficient on the temperature in the range 1.8–1300 K and on magnetic fields of up to 28 kOe for the biomorphic SiC/Si (MDF-SiC/Si) composite and biomorphic porous SiC (MDF-SiC) based upon artificial cellulosic precursor (MDF – medium density fiberboards). It has been shown that electric transport in MDF-SiC is effected by carriers of n-type with a high concentration of ∼1020 cm−3 and a low mobility of ∼0.4 cm2 V−1 s−1. The specific features in the conductivity of MDF-SiC are explained by quantum effects arising in disordered systems and requiring quantum corrections to conductivity. The TEM studies confirmed the presence of disordering structural features (nanocrystalline regions) in MDF-SiC. The conductivity of MDF-SiC/Si composite originates primarily from Si component in the temperature range 1.8–500 K and since ∼500 to 600 K the contribution of MDF-SiC matrix becomes dominant

Tough Love Lessons: Lateral Violence among Hospital Nurses

Background: Workplace violence is a growing social problem among many professions, but it particularly affects the health sector. Studies have mainly focused on evaluating user violence toward health professionals, with less attention being paid to other sources of conflict, such as co-workers themselves. There are different manifestations of this violence in what has been called a context of tolerated or normalized violence among co-workers. However, its effects are far from being tolerable, as they have an impact on general health and job satisfaction and contribute to burnout among professionals. Based on this idea, and following the line of the previous literature, nursing staff are a population at high risk of exposure to workplace violence. For this reason, the present study aims to evaluate exposure to lateral violence or violence among co-workers in nursing staff in public health services and the relationship of this exposure with some of the most studied consequences. (2) Methods: A cross-sectional associative study was carried out in which scales of workplace violence (HABS-CS), burnout (MBI-GS), job satisfaction (OJS), and general health (GHQ-28) were applied to a sample of 950 nursing staff from 13 public hospitals located in the southeast of Spain. (3) Results: The results show that nursing staff have a high exposure to violence from their co-workers, which is more common in male nurses. Greater exposure is observed in professionals with between 6 and 10 years of experience in the profession, and it is not characteristic of our sample to receive greater violence when they have less experience or are younger. A positive correlation is observed with high levels of burnout and a negative correlation with general health and job satisfaction. (4) Conclusions: The results of this work contribute to increasing the scientific evidence of the consequences of a type of workplace violence frequent among nursing staff and to which less attention has been paid in relative terms to other types of prevalent violence. Organizations should be aware of the importance of this type of workplace violence, its frequency and impact, and implement appropriate prevention policies that include the promotion of a culture that does not reward violence or minimize reporting. A change of mentality in the academic environment is also recommended in order to promote a more adequate training of nursing staff in this field

Users’ perception of violence and conflicts with professionals in primary care centers before and during covid-19. a qualitative study

Background: Workplace violence is a social problem of special interest in both intervention and research. Among the sectors that most perceive this type of violence, health care professionals stand out. The most common type of violence for this professional group is the one perpetrated by the users or patients themselves. It has been reported that one out of every four acts of violence in the workplace occurs in the healthcare setting. Within the health sector, the Mental Health, Emergency and Primary Care services have been widely reported as being among the most vulnerable, with Primary Care being the least addressed of the three. Although the available literature is extensive, there are hardly any studies that explore from a qualitative perspective what are the sources of conflict in this sector from the perspective of the users, the most common being to work with professionals. Objective: The aim of this study is to examine those aspects derived from the organization, the professionals or the users of Primary Care that, from the users’ point of view, cause violent situations and how they think these could be avoided. Method: The sample consisted of 80 users of the Primary Care services of the Health Service of Murcia. For data collection, a qualitative study was conducted through 10 focus groups and a subsequent thematic analysis of the data. Results: The results have allowed us to identify that, from an organizational point of view, the uncertainty in waiting times, the need to adapt the telematic or telephone appointment to the different types of users, or the management of emergencies in Primary Care are the aspects that cause most conflicts between users and professionals. In this sense, suggested improvements are aimed at providing information in the mobile application updated on the opening hours or maintaining the telephone appointment for those who need or request it, among many others. As for the professionals, users point out that the medical staff is perceived as distant and sometimes does not provide

ANTOLOGÍA DE ESTRATEGIAS DE VENTAS Y TÉCNICAS DE NEGOCIACIÓN

La negociación es un tema muy importante en una empresa, ya que ésta ayudará a resolver conflictos internos o externos y aportará soluciones que beneficiarán a ambas partes involucradas en dicho conflicto. Aumentar, o simplemente mantener las ventas en condiciones de competitividad es muy importante. Saber cómo afectan las ventas a la compañía a través de un proceso conocido como análisis de ventas puede ayudar a tomar decisiones con respecto a cómo manejar el negocio. El análisis de ventas puede brindar la información necesaria para llevar los productos correctos a los consumidores correctos al costo más bajo, todo con la meta de lograr las ganancias más altas. El análisis de ventas adecuado debe considerar las distintas variables.En el proceso de intercambio en una empresa, se busca que la relación con proveedores, distribuidores y clientes sea de una forma efectiva y a largo plazo, es por lo que las estrategias de ventas y técnicas de negociación ayudan a que la empresa mantenga una buena relación con sus interesados

ANTOLOGÍA DE MERCADOTECNIA SOCIAL Y DE SERVICIOS

Entendiendo que el valor es un beneficio percibido, se pueden crear diferentes valores mediante un solo proceso comercial, esto provoca una un acercamiento a la eficiencia comercial, ya que en un solo proceso se satisfacen a los diferentes implicados en la comercialización. La empresa, los clientes y la sociedad, son los 3 elementos a los cuales se debe de proveer de un valor mediante el proceso comercial, los clientes buscan recibir un beneficio, la satisfacción de una necesidad, la empresa busca recibir otro beneficio, recurso económico, la sociedad, ¿qué valor busca la sociedad?, ¿Por qué es importante generar valor en la sociedad?, ¿Cómo generamos valor a la sociedad?; estas cuestiones son las que se abordan en la unidad de aprendizaje Mercadotecnia social y de servicios.La empresa, los clientes y la sociedad, son los 3 elementos a los cuales se debe de proveer de un valor mediante el proceso comercial, los clientes buscan recibir un beneficio, la satisfacción de una necesidad, la empresa busca recibir otro beneficio, recurso económico, la sociedad, ¿qué valor busca la sociedad?, ¿Por qué es importante generar valor en la sociedad?, ¿Cómo generamos valor a la sociedad?; estas cuestiones son las que se abordan en la unidad de aprendizaje Mercadotecnia social y de servicios. La mercadotecnia es la encargada de crear, diseñar, utilizar y administrar estratégicamente las herramientas, la información, las técnicas y las tácticas adecuadas para lograr comercializar productos, servicios e ideas, de manera eficiente. El logro de comercializar de manera óptima es alcanzado no solo mediante la transacción de bienes, es alcanzado mediante la creación de valor para todos los elementos implicados en las acciones de transacción