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    Wyświetlanie 1-7 z 7
    Tytuł:
    The role of maritime education and training of young adults in creating a strategic model for the management of a public diplomacy project
    Autorzy:
    Czarnecka, A.
    Muszyńska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/116859.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    maritime education and training (MET)
    public diplomacy project
    MET system in Poland
    Dar Mlodziezy
    Gdynia Maritime University (GMU)
    independence sail
    tall ship
    seamanship training
    Opis:
    The article focuses on the issues of maritime education and training of young adults as a tool of public diplomacy. In the first part, the authors present a contemporary approach to the tools and tasks of public diplomacy used for strengthening the image of the state.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 2; 387-392
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reproductive effort as an element of life strategy of Lythrum salicaria L. populations
    Wysilek reprodukcyjny jako element strategii zyciowej populacji Lythrum salicaria L.
    Autorzy:
    Czarnecka, B
    Franczak, M.
    Nowak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/28186.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    purple loosestrife
    meadow
    Lythrum salicaria
    reproductive effort
    clonal plant
    life strategy
    population
    biomass allocation
    Opis:
    The aim of the study was to compare some life strategy traits of individuals of Purple Loosestrife Lythrum salicaria within three meadow populations existing under various habitat conditions. The study attempted to answer the following questions: Do different habitat conditions affect the biomass allocation between particular organs of individuals? Can the individuals belonging to different populations of the same species realise their own unique reproductive strategy, in other words, can their reproductive effort represent various levels? In the case of L. salicaria the reproductive effort, measured by the participation of inflorescence biomass in the biomass of aboveground parts of genets, exhibits similar values (14.2-15.1%) in all the study populations, despite their habitat conditions. This fact proves that at the population level, the reproductive effort is relatively stable. Great differences are visible in the case of particular individuals within each of the populations. Specific genets in a population, depending on the habitat microstructure and the biotic relations with other individuals both of their own and other species, may realise their own reproductive strategies, being a part of their life strategies.
    Celem badań było porównanie wybranych cech strategii życiowej osobników krwawnicy pospolitej Lythrum salicaria w trzech populacjach łąkowych, bytujących w zróżnicowanych warunkach siedliskowych. Poszukiwano odpowiedzi na następujące pytania: Czy odmienne warunki środowiskowe wpływają na sposób podziału materii między poszczególne organy? Czy osobniki różnych populacji tego samego gatunku mogą realizować własną strategię reprodukcyjną tzn., czy ich wysiłek reprodukcyjny może kształtować się na zróżnicowanym poziomie? U L. salicaria wysiłek reprodukcyjny mierzony udziałem biomasy kwiatostanów w biomasie części nadziemnych genetów przyjmuje zbliżone wartości (14,2-15,1%) we wszystkich badanych populacjach, niezależnie od warunków środowiskowych. Dowodzi to, że wysiłek reprodukcyjny na poziomie populacji jest wartością względnie stałą. Natomiast poszczególne osobniki w każdej z badanych populacji, w zależności od mikrostruktury siedliska i oddziaływań biotycznych z innymi osobnikami własnego, jak i innych gatunków, mogą realizować własną strategię reprodukcyjną będącą częścią ich strategii życiowej.
    Źródło:
    Acta Agrobotanica; 2007, 60, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal inversions and sulphure dioxide concentrations in some Polish cities in the winter season
    Autorzy:
    Czarnecka, M.
    Nidzgorska-Lencewicz, J.
    Rawicki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/962779.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Opis:
    The influence of thermal inversions on the variability of sulphur dioxide concentrations in calendar winter (December to February) was assessed based on a 10-year measurement series from 2004/2005 to 2013/2014. The data on daily sulphur dioxide concentrations were obtained from four urban air quality measurement stations operated in a measurement network by the Regional Inspectorate of Environmental Protection (WIOŚ) in Wrocław, and from the ARMAAG Foundation in Gdańsk. The occurrence of thermal inversions was traced based on data from aerological measurements conducted twice daily (at 00:00 and 12.00 UTC) at two aerological stations, in Wrocław and in Łeba. This allowed for determine the thickness of the surface (lower) inversion layers, as well as the height of the base and thickness of the first (the lowest) layer in the free atmosphere (elevated). The effect of inversion on the variability of daily SO2 concentrations was investigated using single linear regression at statistical significance levels of α = 0.05 and α = 0.01. The conditions of dispersion of the pollutants in the lower troposphere in the winter seasons from 2004/2005 to 2013/2014 were predominantly determined by the elevated inversion layers, which occurred in both regions at comparable frequency of almost 90%, both in daytime and nighttime. Surface inversions were recorded significantly less frequently, mostly at night. The data also showed that the thickness of inversion layers and the height at which they formed affected the concentration of SO2, although the statistically significant role of elevated inversions manifested itself at both times of the 24-hour period, whereas the role of surface inversions was evident only at night.
    Źródło:
    Journal of Elementology; 2016, 21, 4
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the Cause and Consequences of Defects in Cast Metal-Ceramic Composite Foams
    Autorzy:
    Popielarski, P.
    Sika, R.
    Czarnecka-Komorowska, D.
    Szymański, P.
    Rogalewicz, M.
    Gawdzińska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079776.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foams
    composites
    casting
    defects
    Opis:
    In this research, the quality of manufactured cast metal-ceramic foams (manufactured using blowing gas) was tested. The causes responsible for defect formation in the composite foams and their consequences were analyzed using the FMEA (Failure Mode and Effects Analysis) method, which is a useful tool for minimizing losses caused by low product quality. This method involves analytically determining correlations between the cause and consequences of potential product defects, and it takes into account the criticality factor (risk). The FMEA analysis showed that pore breaks were the most "critical defect" (with the highest number of effects on the product, the Risk Priority Number, affecting the quality of the composite foam). The second most critical defect was discontinuities in the foam frame structure. Destruction or damage to the foam structure (although very rare) deprived the composite foam of its primary function, which is to reinforce the product. The third most critical defect was non-uniform foam pore size.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 1; 81-88
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impurity studies for the ITER half-field ICRF heating scenarios in hydrogen plasmas on JET
    Autorzy:
    Czarnecka, A.
    Lerche, E.
    Ongena, J.
    Van Eester, D.
    Figueiredo, A. C. A.
    Coffey, I. H.
    Zastrow, K. -D.
    Powiązania:
    https://bibliotekanauki.pl/articles/147692.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    tokamak
    impurities
    ICRF heating
    ITER scenario
    VUV plasma spectroscopy
    Opis:
    Two ion cyclotron range of frequencies (ICRF) heating scenarios, proposed for the non-activated half-B0 phase of ITER in hydrogen plasmas, were investigated on the JET tokamak. This paper we present a detailed study of the impurity content in plasma when the fundamental H and the 2nd harmonic 3He ICRF heating scenarios are realized. The ICRF conditions for those heating scenarios on ITER - i.e. the frequency of 42 MHz for the fundamental H and 53 MHz for the 2nd harmonic 3He heating, and the magnetic field B0 = 2.65 T – were closely reproduced in dedicated experiments on JET. The impurity content of the plasma was determined by means of the spectroscopy in the VUV range. The release of C and Ni impurities during the ICRF heating is presented as a function of the total ICRF heating power supplied in those heating scenarios. The contribution of the Ni impurity to the effective charge of the plasma, Zeff, and the plasma dilution are estimated. We find that for the 3He ICRF heating scenario the impurity content and the plasma energy loss through radiation was higher than for the fundamental hydrogen heating scenario.
    Źródło:
    Nukleonika; 2012, 57, 1; 25-30
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative study of hydroxyapatite and hydroxyapatite mixed with bioglass coatings of metallic implants, deposited by PLD method
    Autorzy:
    Mróz, W.
    Jedyński, M.
    Burdyńska, S.
    Prokopiuk, A.
    Ślósarczyk, A.
    Menaszek, E.
    Ścisłowska-Czarnecka, A.
    Łączka, M.
    Cholewa-Kowalska, K.
    Niedzielska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/286137.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    implants
    hydroxyapatite
    bioglasses
    Opis:
    Hydroxyapatite and bioglasses are important bioactive materials as they exhibit direct bonding with human bone. Therefore they are used as coatings for metallic implants. The aim of the present study was to compare two types of layers: monophase hydroxyapatite (HA) and composite-type HA+BG hydroxyapatite mixed with bioglass (BG) (BG 50% of weight) during the initial stage of their interaction with cell medium. In vitro studies were performed in order to determine the effect of the investigated layers on cell response. After 3 and 7 days the behaviour of the cells grown on the above surfaces was estimated through determination of the cell adhesion (CV colorimetric assay). Cell morphology and properties of biomaterials surfaces were analysed by atomic force microscopy (AFM).
    Źródło:
    Engineering of Biomaterials; 2008, 11, no. 81-84; 121-123
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The membrane with polylactide and hyaluronic fibers for skin substitute
    Autorzy:
    Stodolak-Zych, E.
    Rozmus, K.
    Dzierzkowska, E.
    Zych, Ł.
    Kapacz-Kmita, A.
    Gargas, M.
    Kołaczkowska, E.
    Cieniawska, M.
    Książek, A.
    Ścisłowska-Czarnecka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/306599.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    nanowłókna
    elektroprzędzenie
    kwas hialuronowy
    polilaktyd
    nanofibrous scaffold
    electrospinning
    skin substitute
    hyaluronic acid
    polylactide
    Opis:
    Skin substitutes are heterogeneous group of scaffolds (natural or synthetic) and cells. We hypothesize that nanofibers with layer composition made of polylactide (PLA) and sodium hyaluronate (HA) obtained using electrospinning method are a good matrix for cell adhesion and proliferation. Methods: Optimal conditions of electrospinning of PLA and HA nanofibers to create layered compositions (PLA membrane covered with HA nonwovens) were determined by modifying parameters such as the appropriate amount of solvents, polymer concentration, mixing temperature and electrospinning process conditions. By changing the parameters, it was possible to control the diameter and properties of both polymer fibers. The spinning solution were characterized by surface tension and rheology. A scanning electron microscope (SEM) was used to determine the morphology and fiber diameters: PLA and HA. Structure of the PLA/HA nonwoven was analyzed using spectroscopy (FTIR/ATR). Biocompatibility of the nonwoven with fibroblasts (ECM producers) was assessed in the in vitro conditions. Results: The results showed that stable conditions for the formation of submicron PLA fibers were obtained using a 13% wt. solution of the polymer, dissolved in a 3:1 mixture of DCM:DMF at 45 °C. The hyaluronic fibers were prepared from a 12% wt. solution of the polymer dissolved in a 2:1 mixture of ammonia water and ethyl alcohol. All materials were biocompatible but to a different degree. Conclusions: The proposed laminate scaffold was characterized by a hydrophobic-hydrophilic domain surface with a maintained fiber size of both layers. The material positively underwent biocompatibility testing in contact with fibroblasts.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2018, 20, 4; 91-99
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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