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    Wyświetlanie 1-12 z 12
    Tytuł:
    Using Sandblasting and Sol Gel Techniques for the Preparation of a Metal Surface and Their Effects on the Durability of Epoxy-Bonded Joints
    Autorzy:
    Sałaciński, M.
    Zabłocka, M.
    Synaszko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/97751.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    epoxy-bonded joints
    composite structures
    repair
    sandblasting treatment
    aerospace
    Opis:
    The epoxy-bonded joints are widely employed in aerospace in the Composite Patch Bonded Repair (CPBR) method used for repair metallic and composite structures. The properties of epoxy usually meet the mechanical and environmental requirements, but the durability of bonded joints depends also on the surface preparation. The most common techniques used for the surface preparation are Forest Product Laboratory’s (FPL) technique and Phosphoric Acid Anodizing (PAA). Both methods ensure very good adhesion but they have some disadvantages. They require the application of toxic and aggressive acids, dangerous for the operator. Also, the use of acids for cleaning the surfaces can cause corrosion. The sandblasting treatment of metal surfaces ensures quite good adhesion. This technique requires neither specialist equipment nor the use of toxic substances. Recommended by the Royal Australian Air Force (RAAF) the technique is also used by the Air Force Institute of Technology. Sol Gel is a new product developed for the treatment of metal surfaces before bonding. It is not hazardous for the operator and it does not cause corrosion due to its specific chemical composition. The article describes the behavior of bonded joints between two metal surfaces prepared using sandblasting and Sol Gel. The investigations were carried out in various environment conditions according to the ASTM Standards.
    Źródło:
    Fatigue of Aircraft Structures; 2012, 4; 94-99
    2081-7738
    2300-7591
    Pojawia się w:
    Fatigue of Aircraft Structures
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Validation of empirical and semi-analytical remote sensing algorithms for estimating absorption by Coloured Dissolved Organic Matter in the Baltic Sea from SeaWiFS and MODIS imagery
    Autorzy:
    Kowalczuk, P.
    Darecki, M.
    Zablocka, M.
    Gorecka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/47876.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    validation
    remote sensing
    Ocean colour
    satellite validation
    coloured dissolved organic matter
    organic matter
    absorption
    Baltic Sea
    Gdansk Gulf
    Vistula River
    Opis:
    An extensive bio-optical data set obtained from field measurements was used to evaluate the performance of an empirical (Kowalczuk et al. 2005) and two semi- analytical algorithms: Carder et al. (1999) and GSM01 (Maritorena et al. 2002) for estimating CDOM absorption in the Baltic Sea. The data set includes coincident measurements of radiometric quantities and absorption coefficients of CDOM made during 43 cruises between 2000 and 2008. In the first stage of the analysis, the accuracy of the empirical algorithm by Kowalczuk et al. (2005) was assessed using in situ measurements of remote sensing reflectance. Validation results improved when matching points located in Gulf of Gdańsk close to the Vistula River mouth were eliminated from the data set. The calculated errors in the estimation of aCDOM(400) in the first phase of the analysis were Bias = −0.02, RMSE = 0.46 and R2 = 0.70. In the second stage, the empirical algorithm was tested on satellite data from SeaWiFS and MODIS imagery. The satellite data were corrected atmospherically with the MUMM algorithm designed for turbid coastal and inland waters and implemented in the SeaDAS software. The results of the best case scenario for estimating the CDOM absorption coefficient aCDOM(400), based on SeaWiFS data, were Bias = −0.02, RMSE = 0.23 and R2 = 0.40. The validation of the Kowalczuk et al. (2005) empirical algorithm applied to MODIS data led to a less accurate estimate of aCDOM(400): Bias = −0.03, RMSE = 0.19 and R2 = 0.29. This assessment of the accuracy of standard semi-analytical algorithms available in the SeaWiFS and MODIS imagery processing software revealed that both algorithms (GSM 01 and Carder) underestimate CDOM absorption in the Baltic Sea with mean systematic and random errors in excess of 70%. The paper presents examples of the application of the Kowalczuk et al. (2005) empirical algorithm for producing maps of the seasonal distribution of aCDOM(400) in the Baltic Sea between 2004 and 2008.
    Źródło:
    Oceanologia; 2010, 52, 2; 171-196
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Cure Cycle Time on the Properties of Epoxy-Bonded Joints
    Autorzy:
    Zabłocka, M.
    Sałaciński, M.
    Synaszko, P.
    Kłysz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/97969.pdf
    Data publikacji:
    2012
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    epoxy-bonded joints
    cure cycle
    Composite Patch Bonded Repair (CPBR)
    Opis:
    This paper presents the results of the study of the properties of epoxy-bonded joints. Depending on the parameters of cure cycles the epoxy adhesive film has got various mechanical properties. When it is possible to use cure parameters suggested in the data sheet of the adhesive film the best results are obtained. However, in aerospace applications the cure cycle depends on the thermal resistance of other aircraft elements including electrical equipment, cables, etc., and is different from the recommended in the data sheet. Composite Patch Bonded Repair (CPBR) is a special methodology, where the patch cure cycle and the bonding process must be carried out in one operation. The adhesive film cure cycle parameters depend on the prepreg cure cycle parameters. The purpose of this research is to define the influence of a prolonged cure cycle of the adhesive film on the bonded layer strength properties. The metal surface of the specimen has been prepared for bonding by sandblasting and the use of Corrosion Inhibiting Primer BR 127. The tests were performed with the use of Structural Adhesive Film AF 163-2 and two types of cure cycles: the cycle recommended by the data sheet - 121ºC/60 min and the prolonged one - 121ºC/105 min. After the cure cycle the thickness of the bonded layer was measured. Both specimens were comparatively tested during the following strength tests of the bonded layer: static breaking tests using the wedge and the shear strength investigations. The surface of the bonded layer was observed during the tests by an electronic microscope (100x, 200x), which made it possible to demonstrate the effect of the cure cycle on the porosity and observe the nature of the bonded layer damage – de-cohesive and de-adhesive.
    Źródło:
    Fatigue of Aircraft Structures; 2012, 4; 157-161
    2081-7738
    2300-7591
    Pojawia się w:
    Fatigue of Aircraft Structures
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fluorescence measured in situ as a proxy of CDOM absorption and DOC concentration in the Baltic Sea
    Autorzy:
    Kowalczuk, P.
    Zablocka, M.
    Sagan, S.
    Kulinski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/48318.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Baltic Sea
    measurement
    optical property
    dissolved organic carbon
    concentration
    dissolved organic matter
    fluorescence
    global climate model
    validation
    Źródło:
    Oceanologia; 2010, 52, 3; 431-471
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New simple statistical formulas for estimating surface concentrations of suspended particulate matter (SPM) and particulate organic carbon (POC) from remote-sensing reflectance in the Southern Baltic Sea
    Autorzy:
    Wozniak, S.B.
    Darecki, M.
    Zablocka, M.
    Burska, D.
    Dera, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/47748.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Źródło:
    Oceanologia; 2016, 58, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Steam gasification of multiwire LiYCY type electrical cable
    Zgazowanie parą wodną wielożyłowego kabla elektrycznego typu LiYCY
    Autorzy:
    Szczepaniak, W.
    Zabłocka-Malicka, M.
    Zielińska, A.
    Rutkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/388967.pdf
    Data publikacji:
    2015
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    waste
    electrical cables
    pyrolysis
    gasification
    odpady
    kable elektryczne
    piroliza
    zgazowanie
    Opis:
    Original, non-separated pieces of the LiYCY cable (with multilayer metal/plastic (copper/PVC) structure) were gasified by steam in an excess at atmospheric pressure. Conversion of the gaseous stream was enhanced by catalytic bed of original granulated material, prepared from aluminosilicate (local clay) and calcium carbonate. In the process metal (Cu) preserved unchanged form of cords and braids and was quantitatively separated (49 % of original mass of the cable). Non-metal components (51 % of original mass of the cable) were converted to a slightly sintered non-metallic powder (3.3 % of original mass of the cable) and gaseous phase. Condensation of steam facilitated elimination of tars and oils as well as hydrochloride from the gas. It was estimated that only 5 % of carbon (from the cable components) was retained in the cooling/condensing line, mostly as water non-soluble phases. Efficiency of absorption of hydrochloride by catalytic bed and aqueous condensate was almost the same (but only 50 % of estimated total chlorine quantity was finally balanced).
    Oryginale, nie rozdzielone (w całości) kawałki kabla LiYCY (kabel wielożyłowy, kombinacja warstw metal/tworzywo sztuczne (Cu/PCW)) zgazowywano w nadmiarze pary wodnej pod ciśnieniem normalnym. Konwersję strumienia gazów prowadzono na złożu katalitycznym z oryginalnego, granulowanego materia łu glinokrzemianowego (lokalna glina), z dodatkiem węglanu wapnia. W procesie zgazowania metal (Cu) zachował oryginalną postać linek i oplotów i został ilościowo wydzielony (49 % wag. kabla przed zgazowaniem). Niemetaliczne składniki kabla (51 % wag. kabla przed zgazowaniem) zostały przekształcone do nieznacznie spieczonego, niemetalicznego proszku (3,3 % wag. kabla przed zgazowaniem) i gazu. Kondensacja pary wodnej wspomagała usuwanie z gazu substancji smolistych i olejowych, a także chlorowodoru. Oszacowano, że tylko 5 % węgla (zawartego w tworzywach kabla) zostało zatrzymane w układzie chłodzenia/kondensacji, w zdecydowanej większości jako nierozpuszczalne w wodzie fazy. Skuteczność absorpcji chlorowodoru przez złoże katalityczne i kondensat wodny była praktycznie taka sama (ale zbilansowano ostatecznie tylko 50 % oszacowanej ogólnej zawartości chloru).
    Źródło:
    Ecological Chemistry and Engineering. A; 2015, 22, 1; 103-113
    1898-6188
    2084-4530
    Pojawia się w:
    Ecological Chemistry and Engineering. A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Approach to Structural Health Monitoring of Composite Structures Based on Embedded PZT Transducers
    Autorzy:
    Dziendzikowski, M.
    Dragan, K.
    Kurnyta, A.
    Kornas, Ł.
    Latoszek, A.
    Zabłocka, M.
    Kłysz, S.
    Leski, A.
    Chalimoniuk, M.
    Giewoń, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/97829.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    structural health monitoring
    PZT sensor network
    barely visible impact damages
    Opis:
    One approach to developing a system of continues automated monitoring of structural health is to use elastic waves excited in a given medium by a piezoelectric transducers network. Depending on their source and the geometry of the structure under consideration elastic waves can propagate over a significant distance. They are also sensitive to local structure discontinuities and deformations providing a tool for detecting local damage in large aerospace structures. This paper investigates the issue of Barely Visible Impact Damages (BVIDs) detection in composite materials. The model description and the results of impact tests verifying damage detection capabilities of the proposed signal characteristics are presented in the paper.
    Źródło:
    Fatigue of Aircraft Structures; 2014, 6; 113-118
    2081-7738
    2300-7591
    Pojawia się w:
    Fatigue of Aircraft Structures
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption of La3+ and Dy3+ ions on biohydroxyapatite obtained from pork bones gasified with steam
    Autorzy:
    Szczepaniak, W.
    Zabłocka-Malicka, M.
    Pasiecznik, I.
    Pohl, P.
    Rutkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/208230.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    isotherms
    Freundlich models
    steam gasification
    izoterma
    zgazowanie parą wodną
    modele Freundlich'a
    Opis:
    Adsorption of La3+ and Dy3+ from their aqueous nitrate solutions on biohydroxyapatite (BHAP) originally prepared from raw pork bones by steam gasification of has been investigated for the La3+and Dy3+ concentrations within the range of 1.44·10–4–8.06·10–3 mol/dm3 and 2.71·10–5 5.68·10–3 mol/dm3, respectively. It was found that saturation of the lanthanide uptake occurred at 0.0625 moles of Ln3+ per mole of BHAP. Two model isotherms, i.e., Langmuir (qe = qmCe/((1/KL) + Ce)) and Freundlich (logqe = logKF + (1/n)logCe), were used to fit the adsorption data. The following isotherm parameters were found for La3+: qm = 0.1265 mol/kg, KL = 2701 dm3/mol, n = 5.61, KF = 0.283 (mol/kg)·(dm3/mol)1/n and for Dy3+: qm = 0.1223 mol/kg, KL = 3635 dm3/mol, n = 5.82, KF = 0.306(mol/kg)·(dm3/mol)1/n. A better correlation was found for the Freundlich model. A relatively high value of the n parameter in the Freundlich equation suggests heterogeneous chemisorption of lanthanide ions.
    Źródło:
    Environment Protection Engineering; 2018, 44, 1; 29-40
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of gas bubble formation at the nozzle outlet
    Badanie procesu tworzenia się pęcherzyków gazu u wylotu z dyszy
    Autorzy:
    Rząsa, M. R.
    Boguniewicz-Zabłocka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/388340.pdf
    Data publikacji:
    2014
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    bubble formation
    mathematical models
    bubble volume measurement
    tworzenie pęcherzyków gazu
    modelowanie matematyczne
    pomiar objętości pęcherzy
    Opis:
    The paper presented a short literature review of theoretical models of formation of gas bubbles. On this basis, was prepare a classification of model. In the next step, experimental research was conducted, on the basis of which three were selected basic structure of the formation of bubbles. On the next step Then presents the results of experimental studies on the basis of which three were selected basic structure of the formation of bubbles. The classifications of bubble formation structures were expressed by Eötvös and Reynolds numbers. Furthermore, on this basis, were constructed a map of the structures forming bubbles. This paper presents a measurement method used for determination of parameters of bubbles forming at jet attachment from which the bubbles are displaced upward.
    Praca zawiera krótki przegląd literaturowy modeli teoretycznych tworzenia się pęcherzyków gazu. Na tej podstawie przeprowadzono klasyfikację modeli. Następnie przedstawiono wyniki badań eksperymentalnych, na podstawie których wyłoniono trzy podstawowe struktury tworzenia się pęcherzyków. Klasyfikacje struktur oparto na liczbach kryterialnych Reynoldsa oraz Eötvösa. Posłużyło to do opracowania map struktur tworzenia się pęcherzyków. Ponadto w pracy przedstawiono metodę pomiarową do wyznaczania objętości tworzących się pęcherzyków gazu.
    Źródło:
    Ecological Chemistry and Engineering. A; 2014, 21, 4; 493-502
    1898-6188
    2084-4530
    Pojawia się w:
    Ecological Chemistry and Engineering. A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of mineralogical composition of soil on the consolidation coefficient value
    Wpływ składu mineralnego gruntów na współczynnik konsolidacji
    Autorzy:
    Zabłocka, K.
    Lendo-Siwicka, M.
    Wrzesiński, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083971.pdf
    Data publikacji:
    2020
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    consolidation
    consolidation coefficient
    clay mineralogy
    cohesive soils
    Opis:
    This paper involves the results of oedometric tests carried out on four model samples with different content of expansive clay minerals, subjected to different stresses. The research aimed to determine the impact of consolidation pressure on the consolidation coefficient for cohesive soils with different mineral composition. Main factors influencing correlation between consolidation coefficient and consolidation pressure (Cv–p) trends turned out to be mechanisms controlling changes in soil volume (mechanical or physicochemical), which is different for expansive and non-expansive soils.
    Źródło:
    Acta Scientiarum Polonorum. Architectura; 2020, 19, 3; 83-90
    1644-0633
    Pojawia się w:
    Acta Scientiarum Polonorum. Architectura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Medical and socio-demographic determinants of depressive disorders in diabetic patients
    Autorzy:
    Florek-Łuszczki, M.
    Choina, P.
    Kostrzewa-Zabłocka, E.
    Panasiuk, L.
    Dziemidok, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2085636.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    diabetes
    medical and socio-demographic factors
    depressive disorders
    Opis:
    Introduction. Diabetes is a civilisation disease creating a serious challenge for public health. In Poland, approximately 2 million people suffer from diabetes, of which about 25% are unaware of their illness. A considerable part of persons with diabetes experience complications related with the disease. Objective. The aim of the study was to determine the relationship between elements of the state of health and socio-demographic characteristics of diabetic patients treated in the Diabetes Clinic at the Institute of Rural Health (IMW) in Lublin, eastern Poland, and the occurrence of depressive symptoms in these patients. Materials and method. The study was conducted in 2017–2018 among patients treated in the Diabetes Clinic at the Institute of Rural Health in Lublin, by the method of a diagnostic survey using the Beck’s Depression Inventory and an author-constructed questionnaire, as well as data from the patients’ medical records. The study included 314 patients from the Diabetes Clinic who expressed their informed consent to participate in the research. Results. The study showed that diabetes is a disease which predisposes for the occurrence of depression. The occurrence of depressive symptoms of various degrees of intensity was confirmed in more than a half of the examined patients. Among the factors which exerted a significant effect on the occurrence of depressive symptoms were: diabetic neuropathy, type 2 diabetes, high BMI value, lack of occupational activity, poor material standard, and the need to obtain assistance in daily functioning due to the fact of being ill with diabetes. Conclusions. It is necessary to implement routinely performed examinations into the diagnostic-therapeutic process to assess the state of psychological health of diabetic patients, which would allow sufficiently early application of appropriate psychological or psychiatric intervention.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 2; 255-259
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Position statement of the Polish Academy of Sciences Committee Human Nutrition Science on the principles for the nutrition of children aged 1–3 years
    Autorzy:
    Weker, H.
    Friedrich, M.
    Zabłocka-Słowińska, K.
    Sadowska, J.
    Hamułka, J.
    Długosz, A.
    Charzewska, J.
    Walkowiak, J.
    Socha, P.
    Wądołowska, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/28765551.pdf
    Data publikacji:
    2022
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Opis:
    The Position Statement on the principles of nutrition for children aged 1-3 years emphasizes that proper nutrition of children at this age determines their optimal psychometric development and has beneficial effects on the process nutritional programming, which reduces the risk of diet-related diseases in adulthood. Continued breastfeeding in the post-infancy period, together with the proper introduction of complementary foods, supplies all the nutritional needs of the child. A varied selection of food products is important to balance out the diet of a child in the context of energy and nutrient needs. Attention should be paid to products not recommended for frequent consumption, due to the possibility of the early development of improper eating habits that can lead to undesirable health consequences. Due to the potential risk of deficiency, adequate intake of iron, iodine, calcium and vitamin D, as well as of n-3 PUFAs (which is often insufficient) should be provided. Adequate dietary energy and protein intake protects children against protein–energy undernutrition and is crucial for their proper growth and development. An important element in the assessment of the development of children involves monitoring their nutritional status and physical development by systematically measuring their body weight and length/height and analyzing their weight gain. It is necessary to diagnose the causes of being underweight/ overweight in children. Physical activity (such as outdoor walks, plays, and games) and healthy sleep hygiene are recommended. Physical activity, an adequate number of hours of sleep, and the quality of sleep in early childhood may improve immunity, reduce the risk of excessive weight gain, and consequently reduce the risk of obesity later in life. Other issues discussed include the functioning of the digestive system as one of the determinants of the nutrition of young children, basics of proper nutrition, risk of nutrient deficiencies and development of proper eating habits in early childhood.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2022, 73, 4; 387-402
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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