2,451 research outputs found

    STECF Evaluation of Fishing Effort Regimes in European Waters - Part 2 (STECF-13-21)

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    STECF notes that it has extensively addressed the ToR regarding the requested fishing effort regime evaluations in the 1. Eastern and Western Baltic, 2. the Kattegat, 3. the Skagerrak, North Sea, European waters in ICES Div.2 and the Eastern Channel, 4. to the West of Scotland, 5. Irish Sea, 6. Celtic Sea, 7. Atlantic waters off the Iberian Peninsula, 8. Western Channel, 9. Western Waters and Deep Sea 10. and the Bay of Biscay, i.e. updated estimates of trends in fishing effort, landings and discards by species, CPUE and LPUE by fisheries and species, and partial fishing mortalities for effort regulated and non-regulated fisheries by Member States. Few ToR could not be accomplished due to time constraints and/or data deficiencies. It is noted that compilations of fisheries specific data by fishing effort management regime and Member State are provided as electronic appendixes and can be downloaded at http://stecf.jrc.ec.europa.eu/web/stecf/ewg1313 in order to facilitate transparent dissemination of the information and further use. Due to the complexity of the fisheries information provided, interested users are advised to consult the data quality notes and data notations provided in the present report.JRC.G.4-Maritime affair

    Utilización de factores de crecimiento plaquetarios asociados a fosfato pentacálcico en el tratamiento de lesiones óseas paratumorales en la infancia

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    El tratamiento de las lesiones óseas paratumorales (como el quiste óseo aneurismático y el quiste óseo simple) continúa siendo controvertido. Aunque existen diferentes posibilidades de tratamiento, el porcentaje de fallo en la curación debido a recidivas de estas lesiones no es desdeñable. Los autores presentan su experiencia retrospectiva en 5 casos en diferentes localizaciones anatómicas, tratados mediante curetaje y relleno de la lesión mediante un sustituto óseo (fosfato pentacálcico, fibrina y factores de crecimiento autólogos derivados de plaquetas) con resultados satisfactorios.Treatment of tumorlike lesions of bone (as aneurysmal bone cyst and simple bone cyst) remains controversial. Although there are different possibilities of treatment, the rate of failure to cure due to recurrences of both types of lesions is not negligible. The authors present their retrospective experience in 5 cases in different locations, where such lesions were treated by means of curettage and grafting using a bone substitute (pentacalcium phosphate, fibrine and autologous platelet derived growth factors) with satisfactory results

    Quantum Fluids in Thermodynamic Geometry

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    In this work, the Thermodynamic Geometry (TG) of quantum fluids (QF) is analyzed. We present results for two models. The first one is a quantum hard-sphere fluid (QHS) whose Helmholtz free energy is obtained from Path Integrals Monte Carlo simulations (PIMC). It is found that due to quantum contributions in the thermodynamic potential, the anomaly found in TG for the classical hard-sphere fluid related to the sign of the scalar curvature, is now avoided in a considerable region of the thermodynamic space. The second model is a semi-classical square-well fluid (QSW), described by a quantum hard-sphere repulsive interaction coupled with a classical attractive square-well contribution. Behavior of the semi-classical curvature scalar as a function of the thermal de Broglie wavelength λB\lambda_B is analyzed for several attractive-potential ranges, and description of the semi-classical R-Widom lines defined by the maxima of the curvature scalar, are also obtained and compared with classical results for different square-well ranges.Comment: 9 pages, 8 figure

    Cementless hydroxyapatite coated hip prostheses

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    More than twenty years ago, hydroxyapatite (HA), calcium phosphate ceramics, was introduced as a coating for cementless hip prostheses. The choice of this ceramic is due to its composition being similar to organic apatite bone crystals. This ceramic is biocompatible, bioactive, and osteoconductive. These qualities facilitate the primary stability and osseointegration of implants Our surgical experience includes the implantation of more than 4,000 cementless hydroxyapatite coated hip prostheses since 1990 The models implanted are coated with HA in the acetabulum and in the metaphyseal area of the stem.The results corresponding to survival and stability of implants were very satisfactory in the long-term. From our experience, HA-coated hip implants are a reliable alternative which can achieve long termsurvival, provided that certain requirements aremet: good design selection, sound choice of bearing surfaces based on patient life expectancy,meticulous surgical technique, and indications based on adequate bone quality

    Validation of the Spanish version of the Multidimensional State Boredom Scale (MSBS)

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    Background: Boredom, which is a common problem in the general population, has been associated with several psychiatric disorders. The Multidimensional State Boredom Scale (MSBS) was developed, based on a theoretically and empirically grounded definition of boredom, to assess this construct. The aim of the present study was to assess the psychometric properties of the Spanish validated version of the MSBS in a multi-age sample recruited from the general population. Methods: The patients (N = 303) were recruited from primary care settings. In addition to the sociodemographic variables and the MSBS, the General Health Questionnaire 28 items (GHQ-28), Positive and Negative Affect Scale (PANAS), Negative subscale and the Mindful Attention Awareness Scale (MAAS) were administered. We used confirmatory factor analysis (CFA) to analyse the dimensionality of the MSBS. Cronbach’s a coefficient was used to analyse the internal consistency of the scale. The consistency of the MSBS over time (test-retest reliability) was assessed using the intra-class correlation coefficient. The construct validity was examined by calculating Pearson’s r correlations between the MSBS with theoretically related and unrelated constructs. Cronbach’s a for MSBS was 0.89 (95 % CI, 0.87–0.92), ranging from 0.75 to 0.83 for the 5 subscales. Results: The characteristics of the final sample (N = 303) were that the participants were primarily female (66.77 %) with a mean age of 49.32 years (SD, 11.46) and primarily European (94.71 %). The CFA of the MSBS confirmed that the original five-factor model showed good fit indices: CFI = .96; GFI = .94; SRMR = .05; and RMSEA = .06 [.05–.08]. Cronbach’s a for MSBS was 0.89 (95 % CI, 0.87–0.92), ranging from 0.75 to 0.83 for the 5 subscales. The MSBS showed a test-retest coefficient measured with an ICC of 0.90 (95 % CI, 0.88–0.92). The ICC for the 5 subscales ranged from 0.81 to 0.89. The MSBS showed a significant negative correlation with MAAS and a significant positive correlation with the GHQ (total score and subscales) and PANAS-Negative Affect. Conclusions: The Spanish version of the MSBS has been validated as a reliable instrument for measuring boredom in the general population. This study will facilitate the assessment of boredom for clinical and research purposes in Spanish-speaking populations

    A predictive mechanical model for evaluating vertebral fracture probability in lumbar spine under different osteoporotic drug therapies

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    Osteoporotic vertebral fractures represent a major cause of disability, loss of quality of life and even mortality among the elderly population. Decisions on drug therapy are based on the assessment of risk factors for fracture from bone mineral density (BMD) measurements.A previously developed model, based on the Damage and Fracture Mechanics, was applied for the evaluation of the mechanical magnitudes involved in the fracture process from clinical BMD measurements. BMD evolution in untreated patients and in patients with seven different treatments was analyzed from clinical studies in order to compare the variation in the risk of fracture. The predictive model was applied in a finite element simulation of the whole lumbar spine, obtaining detailed maps of damage and fracture probability, identifying high-risk local zones at vertebral body.For every vertebra, strontium ranelate exhibits the highest decrease, whereas minimum decrease is achieved with oral ibandronate. All the treatments manifest similar trends for every vertebra. Conversely, for the natural BMD evolution, as bone stiffness decreases, the mechanical damage and fracture probability show a significant increase (as it occurs in the natural history of BMD). Vertebral walls and external areas of vertebral end plates are the zones at greatest risk, in coincidence with the typical locations of osteoporotic fractures, characterized by a vertebral crushing due to the collapse of vertebral walls.This methodology could be applied for an individual patient, in order to obtain the trends corresponding to different treatments, in identifying at-risk individuals in early stages of osteoporosis and might be helpful for treatment decisions

    Tachyon warm inflationary universe model in the weak dissipative regime

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    Warm inflationary universe model in a tachyon field theory is studied in the weak dissipative regime. We develop our model for an exponential potential and the dissipation parameter Γ=Γ0\Gamma=\Gamma_0=constant. We describe scalar and tensor perturbations for this scenario.Comment: 9 pages, accepted by European Physical Journal

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    --The aim of this paper is to study the behavior of an earth fill dam, analyzing the deformations determined by high precision geodetic techniques and those obtained by the Finite Element Method (FEM). A large number of control points were established around the area of the dam, and the measurements of their displacements took place during several periods. In this study, high-precision leveling and GNSS (Global Navigation Satellite System) techniques were used to monitor vertical and horizontal displacements respectively. Seven surveys were carried out: February and July 2008, March and July 2013, August 2014, September 2015 and September 2016. Deformations were predicted, taking into account the general characteristics of an earth fill dam. A comparative evaluation of the results derived from predicted (FEM) and observed deformations shows the differences on average being 20 cm for vertical displacements, and 6 cm for horizontal displacements at the crest. These differences are probably due to the simplifications assumed during the FEM modeling process: critical sections are considered homogeneous along their longitude, and the properties of the materials were established according to the general characteristics of an earth fill dam. These characteristics were taken from the normative and similar studies in the country. This could also be due to the geodetic control points being anchored in the superficial layer of the slope when the construction of the dam was finished.-
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