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To prevent and control foodborne diseases, there is a fundamental need to identify the foods that are most likely to cause illness. The goal of this study was to rank 25 commonly consumed food products associated with Salmonella enterica contamination in the Central Region of Mexico. A multicriteria decision analysis (MCDA) framework was developed to obtain an S. enterica risk score for each food product based on four criteria: probability of exposure to S. enterica through domestic food consumption (Se); S. enterica growth potential during home storage (Sg); per capita consumption (Pcc); and food attribution of S. enterica outbreak (So). Risk scores were calculated by the equation Se*W

Let $X$ be a finite connected poset, $F$ a field and $I(X,F)$ the incidence algebra of $X$ over $F$. We describe the bijective linear idempotent preservers $\varphi:I(X,F)\to I(X,F)$. Namely, we prove that, whenever $\mathrm{char}(F)\ne 2$, $\varphi$ is either an automorphism or an anti-automorphism of $I(X,F)$. If $\mathrm{char}(F)=2$ and $|F|>2$, then $\varphi$ is a (in general, non-proper) Lie automorphism of $I(X,F)$. Finally, if $F=\mathbb{Z}_2$, then $\varphi$ is the composition of a bijective shift map and a Lie automorphism of $I(X,F)$. Under certain restrictions on the characteristic of $F$ we also obtain descriptions of the bijective linear maps which preserve tripotents and, more generally, $k$-potents of $I(X,F)$ for $k\ge 3$., Comment: Final version published in Linear Algebra and its Applications

AimA series of knowledge has been developed on burnout syndrome in the sports context that has allowed to generate a solid theoretical structure that requires new contributions to delve into those aspects that have been less addressed, as is the case of optimism and resilience when it comes to linking them to the syndrome in top-performance athletes. For this purpose, the Burnout Inventory for Athletes (IBD-r), the Resilience Scale adapted to Spanish, and the Life Orientation Scale-Revised (LOT-R) for optimism were used.MethodsFrom this perspective, the study was approached with 121 Uruguayan athletes who participated in the last Pan-American Games, assuming practically all the subjects who have this level of sport (142) considering gender and type of sport.ResultsThe results indicate that 67% of the sample presents burnout symptoms for the emotional exhaustion dimension, and moderate resilience and optimism. Although there are no significant differences attributable to gender or type of sport, this contribution allows us to continue focusing on future work and further analysis. The type of sport presented statistically significant differences in relation to the personal competence dimension and the type of sport.ConclusionResilience and optimism obtained a clear influence on the occurrence of burnout, in a statistically negative sense, showing themselves as interesting prevention strategies for future lines of research, where it is essential to design interventions that teach emotional skills to manage adversity and prevent burnout.

Chicken meat is often associated withSalmonella entericacontamination worldwide. This study proposes a risk assessment model for human salmonellosis linked to the domestic consumption of chicken meat in the central region of Mexico, incorporating genotypic and phenotypic data. SixS. entericagroups were used, considering the presence of specific virulence genes and multidrug resistance (MDR). Sixteen exposure scenarios were established considering retail point (RP1 = fresh market/butcher shop; RP2 = mini-super/supermarket), transportation, home storage, cooking, and cross-contamination. The model predicted a mean annual salmonellosis cases of 66,754 due to chicken consumption (CI95% 10775-231606). The mean probability of illness (P

El objetivo de esta investigación fue describir los síntomas conductuales, cognitivos y fisiológicos del síndrome de burnouten deportistas, así como conocer si existen diferencias en la percepción del síndrome de burnoutentre un grupo de expertos que habían tenido algún deportista con burnout y otro que no lo había tenido. Los participantes del estudio fueron 28 expertos en Psicología del Deporte, 11 mujeres y 17 hombres (M edad = 46,75 años; DT= 10,98) a quienes se les administró tres cuestionarios semiestructurados Delphi diseñados específicamente por los investigadores. Ambos grupos destacan como síntomas conductuales: falta de adherencia al entrenamiento y bajo rendimiento deportivo; como síntomas cognitivos: desvalorización de la práctica deportiva e ideas de abandono del deporte; y como síntomas fisiológicos: tensión, y agotamiento físico. Con el acercamiento a la sintomatología característica presentada por los deportistas con el síndrome en este estudio se ha pretendido obtener una mejor comprensión del burnouten el ámbito deportivo. En función de esta información, se podrían desarrollar estrategias tanto de prevención como de intervención, dirigidas a prevenir o tratar la principal sintomatología. ABSTRACT: The aim of the current researchwas to increase the knowledge of the behavioural, cognitive and physiological symptoms of burnout in athletes, additionally knowing if there are differences in the perception of burnout syndrome between a group of experts who had had an athlete with burnout and another who did not have it. The study participants were 28 experts in Sports Psychology, 11 women and 17 men (M age = 46.75 years; SD = 10.98) being administered three semi-structured Delphi questionnaires specifically designed by researchers. Bothgroups highlight as behavioural symptoms: lack of training adherence and low sport performance; as cognitive symptoms: sport devaluation and ideas of drop out of sport; and as physiologicalsymptoms: tension and physical exhaustion. With the approach to the characteristic symptomatology presented by athletes with the syndrome in this study, we tried to get a better understanding of burnout in the sports field. Related to this information, both prevention and intervention strategies might be developed, aimed at preventing or treating the main symptomatology. RESUMO: O objetivo desta pesquisa foi aumentar o conhecimento sobre os sintomas comportamentais, cognitivos e fisiológicos da síndrome de burnout em atletas, bem como saber se existem diferenças na percepção da síndrome de burnout entre um grupo de especialistas que teve um atleta com burnout e outro que não teve. Os participantes do estudo foram 28 especialistas em Psicologia do Esporte, 11 mulheres e 17 homens (idade M = 46,75 anos; DP = 10,98) que receberam três questionários Delphi semiestruturados, especificamente projetados por pesquisadores. Ambos os grupos se destacam como sintomas comportamentais: falta de adesão ao treinamento e baixo desempenho atlético; como sintomas cognitivos: desvalorização da prática esportiva e idéias de abandono do esporte; e como sintomas fisiológicos: tensão e exaustão física. Se plantean propuestas de futuro como analizar otras variables relacionadas con el síndrome. Com a abordagem da sintomatologia característica apresentada pelos atletas com a síndrome neste estudo, procuramosobter uma melhor compreensão do burnout no campo esportivo. Com base nesta informação, estratégias de prevenção e intervenção poderiam ser desenvolvidas, visando prevenir ou tratar os principais sintomas.

En la industria acuícola, se vienen desarrollando acciones encaminadas a buscar fuentes proteicas alternativas palatables y de alto valor biológico para reemplazar las fuentes convencionales. Debido al potencial nutricional de los subproductos animales, se han adoptado tecnologías para su uso, como las técnicas de bioconversión por hidrólisis enzimática. En consecuencia, el objetivo de este estudio fue obtener y evaluar un concentrado de proteína hidrolizada de residuos animales (CPHRA) como alternativa en dietas para Piaractus brachypomus. Las vísceras de los subproductos avícolas se evaluaron utilizando ácido fórmico y vísceras de trucha al 20% para promover la hidrólisis enzimática a un pH más bajo (pH 3,66). El producto resultante se utilizó en la formulación de dietas para determinar coeficiente de digestibilidad aparente (CDA) de energía y nutrientes, utilizando una dieta control () y tres dietas con inclusión de 10%, 20% y 30% de CPHRA (T1, T2 y T3). Se alimentaron por triplicado ciento veinte juveniles de híbridos de cachama blanca con un peso promedio de 145 ± 3,0 g. La CPHRA presentó alto contenido proteico y se evidenciaron diferencias significativas (p < 0,05) para los CDA de materia seca, proteína bruta, grasa bruta, energía bruta y absorción de cenizas, calcio y fósforo. Los CDA de nutrientes y energía estaban por encima del 80%. En consecuencia, el concentrado de proteína hidrolizada de los desechos de aves de corral tiene un gran potencial como alternativa proteica y energética de alto valor nutricional en la alimentación de los peces.

We present the case of hot semi-detached Algols showing photometric cycles longer than the orbital period. The evidence indicating that this long cycle might be due to a magnetic dynamo operating in the rapidly rotating donor star is examined.

El objetivo de este trabajo de investigación fue conocer las diferencias en los estilos educativos parentales percibidos en: jóvenes practicantes de actividad física y no practicantes, jóvenes federados y no federados, competidores y no competidores. La muestra fue de 1800 alumnos escolarizados. Se administró un Cuestionario Sociodemográfico ad hoc y el Test Autoevaluativo Multifactorial de Adaptación Infantil (TAMAI), en el que se utilizó la sub-escala de educación adecuada del padre y de la madre. Los resultados mostraron diferencias significativas en la restricción materna (p

In a first objective, we improve our understanding about surjective and bijective bounded linear operators preserving orthogonality from a JB*-algebra $$\mathcal {A}$$ into a JB*-triple E. Among many other conclusions, it is shown that a bounded linear bijection $$T: \mathcal {A}\rightarrow E$$ is orthogonality preserving if, and only if, it is biorthogonality preserving if, and only if, it preserves zero-triple-products in both directions (i.e., $$\{a,b,c\}=0 \Leftrightarrow \{T(a),T(b),T(c)\}=0$$ ). In the second main result, we establish a complete characterization of all one-parameter groups of orthogonality preserving operators on a JB*-algebra.

This article presents the control and virtualisation of a double effect evaporator plant oriented to teaching-learning processes. A virtual process with similar characteristics to a real one is implemented using CAD tools and the Unity 3D graphic engine, with the aim of simulating the behaviour of an industrial process, specifically, a double effect evaporator; this allows the behaviour of the process to be evaluated and control manoeuvres to be implemented without putting the safety of the operator or the plant at risk. The result is an interactive and immersive virtual environment between the user and the industrial process. The dynamic modelling of the double effect evaporator is incorporated in the virtual environment, so that the virtual animation is similar to a real process.

We establish a more precise description of those surjective or bijective continuous linear operators preserving orthogonality between C $$^*$$ -algebras. The new description is applied to determine all uniformly continuous one-parameter semigroups of orthogonality preserving operators on an arbitrary C $$^*$$ -algebra. We prove that given a family $$\{T_t: t\in {\mathbb {R}}_0^{+}\}$$ of orthogonality preserving bounded linear bijections on a general C $$^*$$ -algebra A with $$T_0=Id$$ , if for each $$t\ge 0,$$ we set $$h_t = T_t^{**} (1)$$ and we write $$r_t$$ for the range partial isometry of $$h_t$$ in $$A^{**},$$ and $$S_t$$ stands for the triple isomorphism on A associated with $$T_t$$ satisfying $$h_t^* S_t(x)$$ $$= S_t(x^*)^* h_t$$ , $$h_t S_t(x^*)^* =$$ $$ S_t(x) h_t^*$$ , $$h_t r_t^* S_t(x) =$$ $$S_t(x) r_t^* h_t$$ , and $$T_t(x) = h_t r_t^* S_t(x) = S_t(x) r_t^* h_t, \hbox { for all } x\in A,$$ the following statements are equivalent

Introduction The aim of this study was to explore the views of experts on the use of big data (BD) advanced analytics (i.e: machine learning, deep learning or artificial intelligence techniques) on the identification of frail older patients with non-malignant diseases who could benefit from early palliative care (PC). Methods This descriptive study corresponds to the first round of a Delphi study currently under performance. Participants were asked through a questionnaire survey about the level of agreement regarding i) the use of advanced analytics on specific clinical scenarios and ii) the critical aspects when using these applications on the frame of PC. The sample included professionals from different countries and disciplines with expertise on chronicity, geriatrics and/or PC. Consensus was defined as >70% of subjects agreement. Results At this time, fifteen experts have answered the questionnaire (37.5% of whom invited to participate). 78.6% were women, 71.4% were working in a clinical setting >15 years as physicians (57.1%), nurses (35.7%) and psychologists (7.1%) 80% of them considered that the strategy based on an automatic tool (BD based) combined with front-line healthcare staff is the best way for identification of patients who could benefit from early PC approach. They assessed as ‘very’ and ‘extremely useful’ the use of BD models on research applications, both as a population health management tool (clinical clustering) and as a tool to improve the prediction of an outcome risk. However, the need for clinical validation and the dearth of evidence of practical benefits are the main critical aspects on the implementation of these tools. Conclusions The view of experts can contribute to guide BD applications on advanced stages of illnesses. The consensus about the opportunities and gaps on the implementation of these tools will support clinicians in decision making processes.

Señalar posibles indicadores psicológicos sobre cómo percibe su misma conducta, permite concretar las referencias sobre cómo orientar la misma de cara a ayudar al deportista a crecer a través del deporte que practica. En constante interactividad y bidireccionalidad (tanto positiva como negativa), las vivencias deportivas permiten la percepción de determinadas respuestas psicológicas, así como las características personales ejercen influencias determinantes para la práctica deportiva. Con el objetivo de describir y establecer relaciones entre algunas de estas diferencias individuales y contextuales, se realiza un estudio con una muestra aleatoria de jóvenes deportistas (N = 436). Utilizando cuestionarios de personalidad (BFQ), creencias sobre el éxito (POSQ) y toma de decisiones (CETD), se obtiene que la perseverancia es el indicador más característico de la muestra. Los deportistas federados difieren significativamente en dominancia, perseverancia y apertura a la experiencia, y los que practican deportes colectivos señalan significativamente mejor cooperación y apertura a la cultura que los que practican deportes individuales, que se orientan a ser más dominantes y estar más abiertos a nuevas experiencias. Además, los federados indican significativamente que están peor en ansiedad y que tienen un nivel más alto en competencia y compromiso para la toma de decisiones. Estos datos se reafirman cuando se establecen relaciones de correlación entre las variables estudiadas.

We prove that every surjective isometry between the unit spheres of two trace class spaces admits a unique extension to a surjective complex linear or conjugate linear isometry between the spaces. This provides a positive solution to Tingley's problem in a new class of operator algebras.

We introduce n-orthogonality (and completely orthogonality) preserving operators between C⁎-algebras. Our main theorem states that every completely orthogonality preserving bounded linear mapping between C⁎-algebras is a weighted TRO homomorphism. We also give several characterisations of TRO homomorphisms among triple homomorphisms.

This article proposes an innovative theoretical framework for applying the Living Lab approach, traditionally adopted in entrepreneurial contexts, to the context of alternating training (AT) at school in co-designing, implementing and evaluating AT scenarios, with the final aim of fostering the role of the school as a social hub connecting several societal actors.

Early childhood education is a developmental period in which early symptoms of attention deficit hyperactivity disorder (ADHD) can be observed. This work examines the educational background of 206 children, from the ages of three to five years (109 of them with an ADHD diagnosis and 97 without a clinical diagnosis), by analysing 306 reports from their teachers. The aim of this study is to discover if these educational reports reflect differences in academic performance and behaviour between both groups. The 123 educational goals analysed in the reports have been classified into 15 categories. A nonparametric analysis (Chi square) was performed on each variable to compare ADHD/control groups. Our results claim that ADHD children show more difficulties in different curricular and behavioural aspects like attention, self-regulation, independence, motivation, basic learning, social relationships, motor skills and communication. These reports are useful in identifying children who are at risk of develo...

O objetivo desse trabalho é de analisar a relação entre o construto otimista, a síndrome de burnout e o estado de humor em esportistas em situação pré-competitiva. A amostra foi constituída por 227 lutadores que participaram do Campeonato de Espanha de Lutas Olímpicas. Os instrumentos utilizados são o LOT-R adaptação espanhola de Otero et al. (1998) do teste de Scheier e Carver (1985), em sua revisão Scheier, Carver e Bridges (1994) em o Inventario de Burnout para Esportistas (IBD). O IBD é uma adaptação para populações desportivas realizadas por Garcés de Los Fayos (1999) do Maslach Burnout Inventory (Maslach & Jackson, 1981) e o Profile of Mood States (POMS). Para a avaliação dos estados de humor foi aplicado de forma abreviada e adaptada por Fuentes, Balguer, Melía e García-Merita (1995), do instrumento original de McNair, Loor y Dropplemam (1971). Os questionários foram administrados durante o Campeonato de Espanha de Lutas Olímpicas, nos escalões Cadete e Sénior. Os resultados indicam uma relação entre otimismo e algumas dimensões do burnout como o esgotamento emocional e a despersonalização, assim como estados de humor como depressão, fadiga e cólera.

We prove that every (not necessarily linear nor continuous) 2-local triple homomorphism from a JBW$^*$-triple into a JB$^*$-triple is linear and a triple homomorphism. Consequently, every 2-local triple homomorphism from a von Neumann algebra (respectively, from a JBW$^*$-algebra) into a C$^*$-algebra (respectively, into a JB$^*$-algebra) is linear and a triple homomorphism.

Diving is an activity that is carried out in an extreme environment with extraordinary psychophysical demands. It requires the divers to undergo an adaptive process in order to survive, to be able ...

It is established that every (not necessarily linear) 2-local $$^*$$ -homomorphism from a von Neumann algebra into a C $$^*$$ -algebra is linear and a $$^*$$ -homomorphism. In the setting of (not necessarily linear) 2-local $$^*$$ -homomorphism from a compact C $$^*$$ -algebra we prove that the same conclusion remains valid. We also prove that every 2-local Jordan $$^*$$ -homomorphism from a JBW $$^*$$ -algebra into a JB $$^*$$ -algebra is linear and a Jordan $$^*$$ -homomorphism.

Background: Visceral Adiposity Index (VAI) has been strongly associated with adipocytokine synthesis, proinflammatory activity, insulin resistance, dyslipidemia, hypertension and atherosclerosis. VAI is a model that includes and correlates anthropometric and metabolic markers and has been proposed as a risk factor index associated with cardiovascular risk in adults. Some studies conducted in pediatric population have extrapolated VAI calculation in order to predict these abnormalities; nonetheless, no adjustment has been done for pediatric ranges in any of the variables included in the formula. The aim of this study was to design a new sex-specific VAI model adjusted for pediatric population. Subjects and methods: Cross-sectional study, 548 children (290 males and 258 females) aged 3-17 years were included for analysis. Eutrophic, apparently healthy children (n = 223) were recruited from 3 public schools located nearby the hospital. Overweight (n = 89) and obese subjects (n = 236) were patients that regularly attend at the Pediatric Obesity Clinic from “Hospital General de México”. Anthropometric evaluation included weight, height, waist circumference (WC). Body mass index (BMI) was calculated and Tg and HDL measured in a 12 hour fasting condition (mMol/L). Results: A non-lineal quadratic regression model accurately explained the relationship between WC and BMI in pediatric population (coefficient of determination R2 = 0.938; p

La piel es el órgano con mayor extensión en el cuerpo humano, una de sus principales funciones es proteger, sin embargo, es el más susceptible. Los mecanismos de inmunidad de los recién nacidos, y particularmente de los prematuros, son relativamente deficientes debido a inmadurez del sistema inmune, así como a una disminución del pasaje transplacentario de anticuerpos maternos, todo lo que contribuye a la vulnerabilidad a infecciones graves bacterianas, fúngicas y virales. Debido a la vulnerabilidad del paciente, a las distintas limitantes que se producen al atender el tema e incluso a la ausencia de información para los cuidados necesarios se ha decidido hacer un procesos investigativos a fin de identificar algunos cuidados que hay que mantener en la pile del recién nacido para evitar patologías o complicaciones dermatológicas. Se ha realizado una revisión bibliográfica a través de ficheros virtuales, utilizando palabras claves como dermatología, recién nacido, pediatría, patologías de piel, se ha escogido de estos trabajos la información que nos interesa para exponer una revisión bibliográfica referencial en cuanto a los cuidados necesarios para el cuidado dermatológico de los recién nacidos. Encontrando que la prevención de la sepsis neonatal comienza con la prevención del parto prematuro, se debe dirigir los esfuerzos en colaborar como parte de un equipo multidisciplinario asegurando el cumplimiento de las estrategias de prevención. El cuidado inadecuado de la piel es una causa de morbilidad y aún la mortalidad en ésta primera etapa de la vida. Es importante considerar la trascendencia de éste órgano como barrera contra las infecciones, protección de los órganos internos, colaborador en el mantenimiento de la temperatura y regulador de agua y electrolitos. Reducir al mínimo las lesiones debe ser considerado un componente clave en el cuidado diario brindado a los recién nacidos.

We prove that every bounded local triple derivation on a unital C*-algebra is a triple derivation. A similar statement is established in the category of unital JB*-algebras.

We introduce generalized triple homomorphisms between Jordan–Banach triple systems as a concept that extends the notion of generalized homomorphisms between Banach algebras given by K. Jarosz and B. E. Johnson in 1985 and 1987, respectively. We prove that every generalized triple homomorphism between JB*-triples is automatically continuous. When particularized to C*-algebras, we rediscover one of the main theorems established by Johnson. We will also consider generalized triple derivations from a Jordan–Banach triple Einto a Jordan–Banach triple E-module, proving that every generalized triple derivation from a JB*triple Einto itself or into E*is automatically continuous.

We initiate the study of orthogonal forms on a real C$^*$-algebra. Motivated by previous contributions, due to Ylinen, Jajte, Paszkiewicz and Goldstein, we prove that for every continuous orthogonal form $V$ on a commutative real C$^*$-algebra, $A$, there exist functionals $\varphi_1$ and $\varphi_2$ in $A^{*}$ satisfying $$V(x,y) = \varphi_1 (x y) + \varphi_2 (x y^*),$$ for every $x,y$ in $A$. We describe the general form of a (not-necessarily continuous) orthogonality preserving linear map between unital commutative real C$^*$-algebras. As a consequence, we show that every orthogonality preserving linear bijection between unital commutative real C$^*$-algebras is continuous., Comment: To appear in Linear and Multilinear Algebra

FRIDA will be a near infrared imager and integral field spectrograph covering the wavelength range from 0.9 to 2.5 microns. FRIDA will work in two observing modes: direct imaging and integral field spectroscopy. This paper presents the main structure of the FRIDA mechanisms control system. In order to comply with a high level of re-configurability FRIDA will comprise eight cryogenic mechanisms and one room temperature mechanism. Most of these mechanisms require high positioning repeatability to ensure FRIDA fulfills with high astronomical specifications. In order to set up the mechanisms positioning control parameters a set of programs have been developed to perform several tests of mechanisms in both room and cryogenic environments. The embedded control software for most of the FRIDA mechanisms has been developed. A description of some mechanisms tests and the software used for this purpose are presented.

The underwater environment is an extreme environment that requires a process of human adaptation with specific psychophysiological demands to ensure survival and productive activity. From the standpoint of existing models of intelligence, personality and performance, in this explanatory study we have analyzed the contribution of individual differences in explaining the adaptation of military personnel in a stressful environment. Structural equation analysis was employed to verify a model representing the direct effects of psychological variables on individual adaptation to an adverse environment, and we have been able to confirm, during basic military diving courses, the structural relationships among these variables and their ability to predict a third of the variance of a criterion that has been studied very little to date. In this way, we have confirmed in a sample of professionals (N = 575) the direct relationship of emotional adjustment, conscientiousness and general mental ability with underwater adaptation, as well as the inverse relationship of emotional reactivity. These constructs are the psychological basis for working under water, contributing to an improved adaptation to this environment and promoting risk prevention and safety in diving activities.

We prove that every biorthogonality preserving linear surjection from a weakly compact JB∗triple containing no infinite dimensional rank-one summands onto another JB∗-triple is automatically continuous. We also show that every biorthogonality preserving linear surjection between atomic JBW∗triples containing no infinite dimensional rank-one summands is automatically continuous. Consequently, two atomic JBW∗-triples containing no rank-one summands are isomorphic if, and only if, there exists a (non necessarily continuous) biorthogonality preserving linear surjection between them.

We establish a complete description of weakly compact orthogonality preserving operators from a C*-algebra A (or a JB*-algebra) to a JB*-triple E. We prove that any such operator is the sum of a series of mutually orthogonal triple homomorphisms from A** to a certain Peirce-2 subspace of E** multiplied by a mutually orthogonal norm-null sequence in E which enjoy certain operator commutativity relations.

This work shows a descriptive study on infringements, defined as actions penalized by referees, and the different competition categories in youth soccer. It analyzes the frequency of sanctions imposed by the Competition Committee of the Soccer Federation of Murcia (Spain) on players and coaches in the different categories of 11-a-side soccer (under-12, under-14, under-16, and under-18). We test the hypothesis that there are significant differences in the frequency of sanctions imposed on players and coaches in the different categories of competition.

We obtain a complete characterization of all orthogonality preserving operators from a JB *-algebra to a JB *-triple. If T : J → E is a bounded linear operator from a JB *-algebra (respectively, a C *-algebra) to a JB *-triple and h denotes the element T**(1), then T is orthogonality preserving, if and only if, T preserves zero-triple-products, if and only if, there exists a Jordan *-homomorphism [Formula: see text] such that S(x) and h operator commute and T(x) = h•r(h) S(x), for every x ∈ J, where r(h) is the range tripotent of h, [Formula: see text] is the Peirce-2 subspace associated to r(h) and •r(h) is the natural product making [Formula: see text] a JB *-algebra. This characterization culminates the description of all orthogonality preserving operators between C *-algebras and JB *-algebras and generalizes all the previously known results in this line of study.

Reasons and motives for sanctions imposed on players and coaches in youth soccer were examined to evaluate frequency and type of infraction by competition category (Under 12, 13–14, 15–16, and 17–18 years). Analysis of the first 30% of competitions yielded 1,202 sanctions of 340 teams with 6,120 players and 340 coaches. For older groups, the number of sanctions for aggressive conduct by the players was significantly higher; frequency of sanctions imposed on the coaches for disrespect also was significantly higher, and those for aggression were higher although not significantly so; the number of sanctions for disrespect by players was not different. Transgressions of the game rules recorded by officials are a valid representation of a pedagogical factor important for coaches and players. Implementing informative programs for knowledge and conduct of rules is suggested.

We study orthogonality preserving operators between C ∗ -algebras, JB ∗ -algebras and JB ∗ -triples. Let T : A → E be an orthogonality preserving bounded linear operator from a C ∗ -algebra to a JB ∗ -triple satisfying that T ∗ ∗ ( 1 ) = d is a von Neumann regular element. Then T ( A ) ⊆ E 2 ∗ ∗ ( r ( d ) ) , every element in T ( A ) and d operator commute in the JB ∗ -algebra E 2 ∗ ∗ ( r ( d ) ) , and there exists a triple homomorphism S : A → E 2 ∗ ∗ ( r ( d ) ) , such that T = L ( d , r ( d ) ) S , where r ( d ) denotes the range tripotent of d in E ∗ ∗ . An analogous result for A being a JB ∗ -algebra is also obtained. When T : A → B is an operator between two C ∗ -algebras, we show that, denoting h = T ∗ ∗ ( 1 ) then, T orthogonality preserving if and only if there exists a triple homomorphism S : A → B ∗ ∗ satisfying h ∗ S ( z ) = S ( z ∗ ) ∗ h , h S ( z ∗ ) ∗ = S ( z ) h ∗ , and T ( z ) = L ( h , r ( h ) ) ( S ( z ) ) = 1 2 ( h r ( h ) ∗ S ( z ) + S ( z ) r ( h ) ∗ h ) . This allows us to prove that a bounded linear operator between two C ∗ -algebras is orthogonality preserving if and only if it preserves zero-triple-products.

In this work a brief summary of FIS-CRM (Fuzzy Interrelations and Synonymy Conceptual Representation Model) and its application to intelligent e-mail management are presented. FzMail tool is based on a soft computing methodology for automatic classification of the mailbox into a fuzzy and hierarchical structure of groups of “conceptually related” messages. FIS-CRM is used to conceptually represent messages and it is also used in the process carried out to deal with the incoming messages in order to keep the achieved conceptual organization. The aim is to make an optimum exploitation of the concepts contained in these messages possible. Therefore, we apply Fuzzy Deformable Prototypes for the document clusters representation. The effectiveness of the method has been proved by applying these techniques in an IR system. The documents considered are composed by a set of e-mail messages produced by some distribution lists about different subjects and languages.

Intelligence and personality traits are currently considered effective predictors of human behavior and job performance. However, there are few studies about their relevance in the underwater environment. Data from a sample of military personnel performing scuba diving courses were analyzed with regression techniques, testing the contribution of individual differences and ascertaining the incremental validity of the personality in an environment with extreme psychophysical demands. The results confirmed the incremental validity of personality traits (ΔR2 = .20, f2 = .25) over the predictive contribution of general mental ability (ΔR2 = .07, f2 = .08) in divers’ performance. Moreover, personality ($R_L^2$ = .34) also showed a higher validity to predict underwater adaptation than general mental ability ($R_L^2$ = .09). The ROC curve indicated 86% of the maximum possible discrimination power for the prediction of underwater adaptation, AUC = .86, p < .001, 95% CI (.82–.90). These findings confirm the shift and reversal of incremental validity of dispositional traits in the underwater environment and the relevance of personality traits as predictors of an effective response to the changing circumstances of military scuba diving. They also may improve the understanding of the behavioral effects and psychophysiological complications of diving and can also provide guidance for psychological intervention and prevention of risk in this extreme environment.

This article presents a semantic-based Web retrieval system that is capable of retrieving the Web pages that are conceptually related to the implicit concepts of the query. The concept of concept i...

Although there have been several theoretical efforts in the past to calculate both the best structure of H–H pairs in Y and the total energies as well as electronic structures, there exist no studies of the relation between hydrogen ordering and the shape of the Fermi surface. We use the FLAPW method, as implemented in the Wien2k code, focusing our research on the relation between chain ordering of H, the relaxation of internal coordinates and the electronic properties for hypothetical α -YH1/3 and α -YH2/3. In addition to the relaxed atomic positions in the cell, we obtain information on the negligible role of the H 1s state contribution near E F and the shape of the Fermi surface.

Hydrographic and underway water velocity profiles were measured at the entrance to Concepcion Bay, an equatorward facing embayment in central Chile, in order to illustrate the wind-induced exchange flow. Observations took place over a 25-h period (5–6 January 2002) during the austral summer, which is characterized by upwelling winds in the region. One portion of the observational transect was directly influenced by the wind and the other was protected from such influence by an island. The portion of the transect influenced by wind showed a surface layer, delimited by a pycnocline, moving downwind owing to the direct action of wind stress. This surface transport should have caused an onshore decrease of surface elevation that would drive upwind flow below the surface layer. The portion of the transect protected by the island was influenced by its wake and perhaps forced by a semidiurnal tide. This study is one of the few observational examples of wind-induced flow that documents the wind-induced exchange pattern under weak internal friction (low Ekman number). This pattern consists of downwind flow in an upper layer delimited by the pycnocline and upwind flow below.

The main objective of this work is to improve the quality of the results produced by the Internet search engines. In order to achieve it, the FIS-CRM model (Fuzzy Interrelations and Synonymy based Concept Representation Model) is proposed as a mechanism for representing the concepts (not only terms) contained in any kind of document. This model, based on the vector space model, incorporates a fuzzy readjustment process of the term weights of each document. The readjustment lies on the study of two types of fuzzy interrelations between terms: the fuzzy synonymy interrelation and the fuzzy generality interrelations (“broader than” and “narrower than” interrelations). The model has been implemented in the FISS metasearcher (Fuzzy Interrelations and Synonymy based Searcher) that, using a soft-clustering algorithm (based on the SISC algorithm), dynamically produces a hierarchical structure of groups of “conceptually related” documents (snippets of web pages, in this case).

We present a spectroscopic and photometric study of the eclipsing binary TU Canis Majoris aimed to obtain their fundamental stellar parameters and evolutionary stage. Our results indicate that the masses, radii, temperatures, and luminosities for the primary and secondary stars are: , , , , K, K, , and . We estimate an age for the system of years, and a distance of pc. In addition, we note that none of the components has filled their respective Roche lobe and both are on the main sequence.

Environmental stressors require the professional diver to undergo a complex process of psychophysiological adaptation in order to overcome the demands of an extreme environment and carry out effective and efficient work under water. The influence of cognitive and personality traits in predicting underwater performance and adaptation has been a common concern for diving psychology, and definitive conclusions have not been reached.In this ex post facto study, psychological and academic data were analyzed from a large sample of personnel participating in scuba diving courses carried out in the Spanish Navy Diving Center. In order to verify the relevance of individual differences in adaptation to a hostile environment, we evaluated the predictive validity of general mental ability and personality traits with regression techniques.The data indicated the existence of psychological variables that can predict the performance ( R² = .30, p.001) and adaptation ( R²(N) = .51, p.001) of divers in underwater environment.These findings support the hypothesis that individual differences are related to the probability of successful adaptation and effective performance in professional diving. These results also verify that dispositional traits play a decisive role in diving training and are significant factors in divers' psychological fitness.

FRIDA will be a near infrared imager and integral field spectrograph covering the wavelength range from 0.9 to 2.5 microns. Primary observing modes are: direct imaging and integral field spectroscopy. This paper describes the main advances in the development of the electronics and control system for both the mechanisms and house-keeping of FRIDA. In order to perform several tests of mechanisms in both room and cryogenic environments, a set of programs had been developed. All variables of the vacuum control system were determined and the main control structure based on one Programmable Logic Controller (PLC) had been established. A key function of the FRIDA’s control system is keeping the integrity of cryostat during all processes, so we have designed a redundant heating control system which will be in charge of avoiding cryostat inner overheating. In addition, some improvements of cryogenic and room temperature cabling structure are described.

FRIDA is a diffraction limited imager and integral field spectrometer that is being built for the Gran Telescopio Canarias. FRIDA has been designed and is being built as a collaborative project between institutions from Mexico, Spain and the USA. In imaging mode FRIDA will provide scales of 0.010, 0.020 and 0.040 arcsec/pixel and in IFS mode spectral resolutions R ~ 1000, 4,500 and 30,000. FRIDA is starting systems integration and is scheduled to complete fully integrated system tests at the laboratory by the end of 2015 and be delivered to GTC shortly after. In this contribution we present a summary of its design, fabrication, current status and potential scientific applications.