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    Wyświetlanie 1-10 z 10
    Tytuł:
    Mental health of Filipino seafarers: the contributory factors and the strategies applied onboard ship
    Autorzy:
    Sarinas, B. G. S.
    Botante, J. D. D.
    Nacion, J. S.
    Bernas, M. L. B.
    Rodriguez, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2172470.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    mental health
    seafarers
    Filipino
    onboard test
    stress fatigue
    seafarers problems
    Opis:
    Mental health is equally important with physical health. Many reports found out that poor mental health is one of the major factors of depression among seafarers. This study ascertains the factors affecting mental health and the strategies applied by Filipino seafarers to combat these issues. A survey was used as a research design. A total of 100 seafarers taken through convenience and snowball sampling answered the validated researcher-made questionnaire. The questionnaire was sent in the JBLFMU Alumni Portal, messenger, and Gmail. Frequency, percentage, and rank were used. Themes were used to classify the strategies applied by seafarers to counteract mental health issues onboard ship. The results revealed that the major contributory factor affecting the mental health of Filipino seafarers is stress, while they believed that a positive outlook in life makes one’s self free from mental health problems onboard. The top three factors are stress, fatigue, and separation from families and friends. The top three strategies to counteract factors that affect seafarers’ mental health onboard ship are staying positive, socializing with crewmates, and communicating with family.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 1; 125--134
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the soil water content on Jatropha seedlings in a tropical climate
    Autorzy:
    Perez-Vazquez, A.
    Hernandez-Salinas, G.
    Avila-Resendiz, C.
    Valdes-Rodriguez, O.A.
    Gallardo-Lopez, F.
    Garcia-Perez, E.
    Ruiz-Rosado, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/25415.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    The purpose of this study was to evaluate growth, chlorophyll content, and photosynthesis in Jatropha at different levels of soil moisture. Plants were cultivated in containers and the treatments of the soil water content evaluated were: 0% (without watering), 20, 40, 60, and 80% soil water content. Plant height was statistically similar for all treatments, but the number of leaves differed significantly. Total dry matter and chlorophyll at 40, 60, and 80% soil water content were statistically similar, but different from 0 and 20% soil water content. Leaf area at 40, 60, and 80% soil water content was statistically different from 0 and 20% soil water content. The photosynthetic rate, transpiration and stomatal conductance at 60 and 80% soil water content were statistically similar but different from 0 and 20% soil water content. Water stress affected growth, chlorophyll content, photosynthetic rate, transpiration, and stomatal conductance.
    Źródło:
    International Agrophysics; 2013, 27, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability of Bilayer Superconductors against Thermomagnetic Avalanche
    Autorzy:
    Vasiliev, S.
    Chumak, O.
    Chabanenko, V.
    Pérez-Rodríguez, F.
    Nabiałek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1374778.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Op
    74.72.-h
    74.25.Sv
    Opis:
    The problem of stability of bilayer type II superconductor with different critical current densities of inner part and coating was considered. The optimum thickness of surface layer enabling the maximal increase of the field of first flux jump was found. The field of instability for such bilayer structure was calculated for NbTi superconductor. An increase of the field of the first flux jump by about 60% has been found for optimal coating thickness.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4a; A-84-A-87
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annual cycle of phytoplankton community through the water column: Study applied to the implementation of bivalve offshore aquaculture in the Southeastern Bay of Biscay
    Autorzy:
    Muniz, O.
    Revilla, M.
    Rodriguez, J.G.
    Laza-Martinez, A.
    Fontan, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47941.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    water column
    open water
    bivalve
    biomass
    chlorophyll a
    nutrient
    hydrographic condition
    environmental variability
    Biscay Bay
    Źródło:
    Oceanologia; 2019, 61, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of a sheltered euhaline area of the Southeastern Bay of Biscay to sustain bivalve production in terms of phytoplankton community composition
    Autorzy:
    Bilbao, J.
    Muniz, O.
    Rodriguez, J.G.
    Revilla, M.
    Laza-Matinez, A.
    Seoane, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078991.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    phytoplankton composition
    biomass
    physicochemical variation
    aquaculture
    mussel
    Biscay Bay
    Opis:
    This study describes the phytoplankton community in sheltered euhaline waters of the Basque coast (southeastern Bay of Biscay). Phytoplankton composition, cell size, abundance, biomass and the presence of potentially toxic taxa, together with chlorophyll a, nutrients and hydrographic and optical conditions were measured, from August 2016 to August 2017, in the Mutriku port, with the main aim of assessing the suitability of the phytoplankton community as a food resource for bivalves. The water column in Mutriku showed the typical environmental conditions of Basque marine waters, with no significant nutrient enrichment caused by anthropogenic pressures. Haptophytes represented the greatest contribution to cell abundance (31—47%), and diatoms were the dominant group in terms of biomass (52—79%), which could favour mussel growth due to their high fatty acid content. In addition, the size structure of the phytoplankton community was suitable for mussel ingestion, since the predominant cell size was 2—20 μm. Regarding toxic phytoplankton, the genera that pose a risk for human health and those that affect negatively mussel physiology and survival were considered. Altogether, ten toxic phytoplankton taxa were identified, contributing in less than 5% to the total cell abundance of Mutriku. However, median chlorophyll a concentration was low (0.5 μg L−1), reflecting the oligotrophic conditions of the area. Therefore, even if the composition of the phytoplankton community could be favourable for bivalve aquaculture, biomass values are low compared to other zones of bivalve production.
    Źródło:
    Oceanologia; 2021, 63, 1; 12-26
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inhomogeneity detection in phytoplankton time series using multivariate analyses
    Autorzy:
    Muniz, O.
    Rodriguez, J.G.
    Revilla, M.
    Laza-Martinez, A.
    Seoane, S.
    Franco, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079181.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    phytoplankton community
    monitoring programme
    uncertainty
    multivariate analysis
    inhomogeneity
    Opis:
    Phytoplankton communities have long been used as water quality indicators within environmental policies. This has fostered the development of national and international phytoplankton monitoring programs, but these networks are subject to sources of uncertainty due to laboratory issues. Nevertheless, studies regarding the interference associated with these aspects are not well-documented. Hence, a long time series (2003–2015) from the Basque continental shelf (southeastern Bay of Biscay) was analyzed to evaluate the uncertainty given by laboratory strategies when studying phytoplankton variability. Variability in phytoplankton communities was explained not only by environmental conditions but also by changes in fixatives (glutaraldehyde and acidic Lugol's solution) and laboratory staff. Based on Bray-Curtis distances, phytoplankton assemblages were found to be significantly dissimilar according to the effect of changes in the specialist handling the sample and the employed fixative. The pair-wise permutational multivariate analysis of variance (PERMANOVA) showed significant differences between the two fixatives utilized and also between the three taxonomists involved. Thus, laboratory-related effects should be considered in the study of phytoplankton time series.
    Źródło:
    Oceanologia; 2020, 62, 3; 243-254
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obtaining a Rough Flux Front in Type-II Superconductors Using a Critical State Model
    Autorzy:
    Romero-Salazar, C.
    Hernández-Flores, O.
    Chabanenko, V.
    Kuchuk, E.
    Abaloszewa, I.
    Nabialek, A.
    Pérez-Rodríguez, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398648.pdf
    Data publikacji:
    2016-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.20.-z
    74.20.De
    74.25.Ha
    74.25.N-
    74.25.Op
    74.25.Sv
    74.25.Wx
    74.62.Dh
    74.81.-g
    Opis:
    In this work we numerically modelled a periodic magnetic flux pattern which qualitatively reproduces the so-called sand avalanches scenario in type-II superconductors. To model these sand-pile patterns we consider a perturbation on the critical current which, as a first approximation, follows a periodic function which depends on the position.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 2; 645-648
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microdamage distribution in fatigue fractures of bone allografts following gamma-ray exposure
    Autorzy:
    Presbítero, G.
    Hernandez-Rodríguez, M. A. L.
    Contreras-Hernandez, G. R.
    Vilchez, J. F.
    Susarrey, O.
    Gutiérrez, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/307297.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    rozkład Weibulla
    pękanie zmęczeniowe
    promieniowanie gamma
    kość korowa
    mikrouszkodzenia
    allografts
    Weibull distribution
    fatigue fracture
    gamma radiation
    cortical bone
    microdamage
    Opis:
    Although clear evidence of significant differences in bone properties have been extensively studied, results vary under the ranges usually used for sterilization purposes (25-35 kGy). Hence, the aim of this work was the study of the mechanical properties and microdamage development of human bones used as allografts following gamma-ray exposure, followed by an extensive statistical analysis of microdamage effects in fatigue behaviour. Methods: Specimens of the cortical region of human femurs were exposed to 15-25 kGy and 26-30 kGy radiation levels, then they were subjected to compression fatigue tests until fracture. The fatigue life was determined in relation to the radiation level, and the evolution of microdamage was assessed through fluorescence microscopy in order to calculate characteristic lengths of microcracks. Results: Significant differences in fatigue life were detected (p < 0.05) between non-radiated (control) and radiated specimens, resulting in a drastic 89.2% fatigue life reduction of the 15-25 kGy group, and 95.3% in the 26-30 kGy group in comparison to the control. Microdamage analysis showed a considerable increase in microcrack lengths when bone was exposed to gamma radiation, which may indicate that bones used as allografts could fracture at some point when subjected to in vivo loading conditions. Conclusions: The results of our research indicate that, even if a range of 15-25 kGy is suggested to sterilize bone allografts, such practice needs to be reconsidered. In addition, with use of Weibull distribution, this work describes the conditions in which microcracks grow towards the fracture of bones in relation to the decrease in their mechanical properties.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 4; 43-53
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Grain-Size Prediction Model in Aluminum Castings Manufactured by Low-Pressure Technology
    Autorzy:
    Fernández-Calvo, A. I.
    Lizarralde, I.
    Sal, E.
    Rodríguez, P.
    de Zabalegui, E. O.
    Cia, I.
    Rios, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/106923.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    grain refinement
    AlSi7Mg alloy
    thermal modulus
    cooling rate
    solidification evolution
    Opis:
    The grain refinement in a real casting manufactured by Low Pressure Die Casting (LPDC) such as wheels and steering knuckles depends on the grain-refinement potential of the metal and the geometry of the part/process parameters. For this study, the effect of the cooling rate on the AlSi7Mg alloy with different metal qualities in terms of grain refinement was tested. The grain size has been metallographically evaluated in cylindrical test pieces and in the real wheels and steering knuckles manufactured at the Mapsa and Fagor Ederlan foundries. The Thermolan®-Al system has been used to evaluate the nucleation potential in terms of grain size on a standard cup. The grain size has been modeled taking into account the effect of the cooling rate measured in the center of the cylindrical test parts and the different grain-size potential. Different grades of refinement have been tested. The grain size measured in a real casting (wheel and steering knuckle) was used to calibrate the model for a real part in LPDC for different grain-size potential.
    Źródło:
    Journal of Casting & Materials Engineering; 2018, 2, 4; 71-77
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement of the physicochemical, performance, and consumer-information characteristics of commercial nonmedicated shampoo for dogs
    Autorzy:
    Peña-Corona, S.I.
    Juárez-Rodríguez, I.
    Vargas-Estrada, D.
    Amador-González, E.
    Arvizu-Tovar, L.
    Soberanis-Ramos, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539147.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    veterinary shampoo
    quality control
    sensory evaluation
    performance evaluation
    label
    animal welfare
    dog bath
    Opis:
    The aim was to analyze the quality of commercial shampoo without prophylactic effect for dogs. The analysis was based on the evaluations and requirements established for human-line products since there is no guide for veterinary products in Mexico; such evaluations have not been carried out or published in Mexico. Physicochemical, sensory, performance, and consumer information tests of the shampoo were carried out. The sample consisted of twenty products marketed in Mexico City. During the evaluation of the label, a serious non-compliance with applicable regulations was found. The pH of the products ranged between 5.6 and 8.4; Significant differences (p<0.05) were found between the three groups with low (6.1), medium (7.2), and high (8.1) pH. Viscosity values were from 1131 to 3102. For the foam index, no statistically significant differences were found. 100% of the products analyzed complied with the rest of the quality tests carried out. The results of the quality analysis in this study will allow veterinarians specializing in small species to better select and recommend the products for their use and inform dog owners, about the safety, and value of the products.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 2; 213-221
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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