Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "T.CH." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-33 z 33
    Tytuł:
    Theoretical study of ferroelectric triglycine sulphate (TGS) crystal in external electric fields
    Autorzy:
    Upadhyay, T. Ch.
    Nautiyal, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412113.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ferroelectric
    Green's functions
    anharmonic
    dielectric constant
    loss tangent
    coustic attenuation
    Opis:
    A modified two sub-lattice pseudospin-lattice coupled mode model of Mitsui et al [Phys. Rev., 111 (1958) 1259] by adding third, fourth order phonon anharmonic interaction and external electric field terms has been applied to ferroelectric triglycine sulphate crystal. Electric field dependence of ferroelectric, dielectric and acoustical properties has been studied. With the help of double time temperature dependent Green’s function method, expressions for shift, width, soft mode frequency, dielectric constant, loss tangent and acoustic attenuation have been derived. Numerically calculations have been made and results have been compared with experimental data reported by Bye et al [Ferroelectrics 4 (1974) 243] and Shreekumar et al [Ferroelectrics 160 (1994) 23] for TGS crystal and a good agreement has been observed.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 6; 54-65
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formy i charakterystyki parametrów splotowego modelu pośrednich możliwości dla ruchów do pracy w dużych aglomeracjach
    Forms and characteristics of intervening opportunities parameters for work based travels in agglomerations
    Autorzy:
    Glogowski, Ch.
    Zipser, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/248537.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
    Tematy:
    teoria pośrednich możliwości
    hipoteza rozkładu splotowego
    model wymiany ruchu
    parametry modelowe
    intervening opportunities
    convolution model
    trip distribution
    modelling parameters
    Opis:
    Problematyka właściwego doboru parametrów i określenie ich wartości liczbowych w modelach wymiany ruchu stanowi kluczowe zagadnienie dla ich właściwego zastosowania. Modele oparte na klasycznej teorii pośrednich możliwości, jakkolwiek z definicji jednoparametrowe, doczekały się wielu publikacji odnoszących się do sterującego procesem rozkładu podróży parametru selektywności. Hipoteza splotowa wprowadza jednak dwa rozkłady prawdopodobieństwa, wykładniczy z selektywnością jako parametrem i rozkład równomierny, którego zakres i wartości liczbowe należy dopiero określić, aby uzyskać właściwy typ rozkładu splotowego. Problematyka ta stoi w centrum uwagi niniejszego opracowania. Analizie poddano rozkłady podróży do pracy uzyskane na podstawie wyników badań empirycznych. Określone na ich podstawie typy występujących rozkładów, zakres i wartości liczbowe parametrów skonfrontowano następnie z teoretycznymi wykresami rozkładów splotowych. Zwrócono przy tym uwagę na przestrzenne aspekty występowania poszczególnych wariantów splotu . Powyższe rozważania zilustrowano na przykładzie trzech aglomeracji, Wrocławia, Frakfurtu n. Menem i Kassel.
    The intervening opportunities model operates with a parameter – the stable contact selectivity. Since the selectivity constitutes the density of the probability of acceptance it may be sensitive also to the opportunities clustering in extremely attractive areas. The modification is based on certain regularities observed in cumulative distribution diagrams of actual trips plotted on the coordinative basis of the number of possible destinations and not of the covered distance. These regularities are concerned with the diagram concavity. The position of which correlates very often with the area of agglomeration core. Detailed analysis of regularities led to the hypothesis: the distribution of the probability of opportunity acceptance lying in a defined position is the convolution of two distributions of probability. One distribution concerning the probability of acceptance itself is the negative exponential distribution. The second probability distribution is a uniform one and has to be responsible for the decrease of the acceptance. This form of the model allowed us to obtain a very good representation of the real situation. Some types of existing configurations of convolution distribution were stated on the basis of observations made in Wroclaw and Frankfurt/Main and Kassel. The adequate interpretation of the reason for the diversity is actual goal of investigation.
    Źródło:
    Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne; 2012, 1(97); 77-99
    1231-9171
    Pojawia się w:
    Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diffusion of Potassium on the W(112) Plane Preadsorbed by Ni Atoms: Field Emission Current Fluctuations - Autocorrelation Study
    Autorzy:
    Biernat, T.
    Błaszczyszyn, R.
    Kleint, Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027391.pdf
    Data publikacji:
    2001-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.70.+q
    68.37.Vj
    68.43.Jk
    05.40.Ca
    Opis:
    Diffusion of potassium adsorbate on the W(112) plane with preadsorbed nickel was investigated by means of the autocorrelation function of field emission current fluctuations. A comparison of the experimental autocorrelation function with that of a theoretical calculation by Gesley and Swanson gives the surface diffusion coefficient of potassium. From its temperature dependence the diffusion activation energy at several Ni pre-coverages for a constant potassium coverage (Θ$\text{}_{K}$=0.4) is derived. The dependence of the activation energy for potassium surface diffusion on the nickel coverage - first reduction and then an increase with increasing Ni coverage - is observed. This is in agreement with the results obtained from the spectral analysis of the field emission current fluctuations of the same system. The decrease is understood to be a result of the smoothing effect caused by Ni atoms on the W(112) plane.
    Źródło:
    Acta Physica Polonica A; 2001, 99, 6; 665-672
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geomechanical aspects of hydraulic fracture propagation in the Lublin shale gas field in Poland
    Autorzy:
    Dhital, Ch.
    Knez, D.
    Śliwa, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/299235.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    shale gas
    hydraulic fracture simulation
    Opis:
    The recent boom in shale gas exploration around the world has sparked a paradigm shift in energy security in many countries in the world. With the successful exploration of shale gas production in the United State’s, many operators are trying to replicate the success in other parts of the world specifically in European countries where the presence of organic rich shale deposits have signaled a promising investment for the recovery of shale gas. Perspective studies for the Polish shale gas field in Poland have been ongoing. One part of this project is the comparison of hydraulic fracture thickness between the U.S shale gas field and Polish for better and effective design and modeling of reservoirs for the optimal exploration and recovery of shale gas. Successful production of natural gas from Polish basins requires a hydraulic fracture stimulation to unlock the gas trapped in the shales coupled with a geologic analysis of the shale rocks.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 4; 703-711
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intuicja warunkiem dobrego dowodzenia
    Autorzy:
    Rogers Ch. T.
    Powiązania:
    Przegląd Informacyjno Dokumentacyjny/ Centralny Ośrodek Naukowej Informacji Wojskowej Centralny Ośrodek Naukowej Informacji Wojskowej, 1995, nr 4, s. 37-47
    Współwytwórcy:
    Czernohorski, Gerard. Opracowanie
    Data publikacji:
    1995
    Tematy:
    Dowodzenie
    Podejmowanie decyzji
    Opis:
    Oprac. art. Intuition an imperative of command zamieszcz. w Military Review - 1994, nr 3, s. 38-50.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    An assessment of cleaning mechanisms driven by power ultrasound using electrochemistry and highspeed imaging techniques
    Autorzy:
    Offin, D.
    Vian, Ch.
    Birkin, P.
    Leighton, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/331598.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    electrochemistry
    cleaning mechanisms
    high-speed imaging techniques
    Opis:
    The cleaning of a surface is monitored in real time using a number of physical measurements. In particular an electrochemically inactive material is removed from an electrode while the electrode is able to detect a redox system in the bulk liquid. The removal of the material from the surface is monitored as an increased Faradaic current at the electrode surface. This signal is used to assess the ability of the cleaning method employed, in this case the application of power ultrasound to the system, as a function of the position of the electrode with respect to the sound source. It is shown that, depending on the conditions employed, surface cleaning is driven by different mechanisms. In order to validate these findings highspeed imaging of the system was undertaken and the results correlated with the electrochemical data. In addition a number of novel electrodes were also employed to assess the cleaning efficiency as a function of the electrode geometry employed. Implications for surface cleaning in the presence of power ultrasound are suggested.
    Źródło:
    Hydroacoustics; 2008, 11; 299-312
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aboveground biomass and vertical distribution of crown for Taiwan red cypress 20 years after thinning
    Autorzy:
    Yen, T.-M.
    Lee, J.-S.
    Li, Ch.-L.
    Chen, Y.-T.
    Powiązania:
    https://bibliotekanauki.pl/articles/41445.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Opis:
    The aim of this study was to analyze the influence of thinning on the different growth stages of the Taiwan red cypress (Chamaecyparis formosensis Matsum) on the aboveground biomass allocation patterns and vertical distribution of foliage and branch biomass at the tree level. Although numerous studies in various fields have focused on the influence of thinning effects for Taiwan red cypress, few have assessed the aboveground biomass allocation of different growth stages, or conducted a long-term thinning observation. In this study, we examined 3 even-aged plantations in central Taiwan. In 1982, 3 stands, at ages 7, 15, 21 years, simultaneously began thinning trials. A thinning study was conducted once 20 years ago, and we assessed the long-term effects. The effects of thinning in each of the stands were analyzed and compared at the tree level 20 years later. Each component of the aboveground biomass (foliage, branches, and boles) increased with the thinning intensity, regardless of the age category of the trees; however, the crown mass/ aboveground tree mass appeared the same for each tree age category, regardless of the thinning intensity. We inferred that this phenomenon might result from the same proportional increase of crown mass and aboveground tree mass as the thinning intensity was increased. An allometric function was used to quantify the vertical distribution of the foliage and branch biomass; the results showed an increase in the accumulation of the branch biomass at lower heights following thinning, and the same trend was apparent in all 3 plantations.
    Źródło:
    Dendrobiology; 2013, 70
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Protective role of curcumin in maximal electroshock induced seizures, memory impairment and neurotransmitters in rat brain
    Autorzy:
    Jithendra, Ch.
    Murthy, T.E.G.K.
    Upadyay, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/3067.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Journal of Pre-Clinical and Clinical Research; 2008, 02, 1
    1898-2395
    Pojawia się w:
    Journal of Pre-Clinical and Clinical Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coherent Ferromagnetic Precipitate and Anomalies in the Heat Conduction and Thermopower of Mn$\text{}_{2-x}$Cr$\text{}_{x}$Sb Single Crystals
    Autorzy:
    Kattwinkel, A.
    Kraus, E.
    Kleeberg, Ch.
    Groń, T.
    Bärner, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968922.pdf
    Data publikacji:
    1998-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Kz
    72.15.Eb
    72.15.Jf
    Opis:
    The heat diffusivity D, the electrical resistivity ρ and the thermoelectric power S of tetragonal Mn$\text{}_{2-x}$Cr$\text{}_{x}$Sb single crystals with 0.02 < x < 0.12 have been measured in the temperature range of 90 K < T < 350 K and along different crystal axes. The heat conductivity κ and σ = 1/ρ are anisotropic along the crystal axes a, c with a ratio of 2:1. κ(T) , ρ(T) and S(T) show anomalies at the spin reorientation temperature T$\text{}_{Rm}$ of the matrix (M) Mn$\text{}_{2-x}$Cr$\text{}_{x}$Sb, but also at that of the coherent ferromagnetic precipitate (P) Mn$\text{}_{1.037}$Cr$\text{}_{0.11}$Sb, T$\text{}_{R_{p}}$ which is assigned to variations in the spin dependent scattering at the M /P interfaces via changes in the relative orientation of the magnetization vectors of matrix and precipitate (spin valve effect).
    Źródło:
    Acta Physica Polonica A; 1998, 93, 5-6; 745-762
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A concurrent presentation of nonspecific colitis as well as likely myocarditis
    Autorzy:
    Heavener, T.
    Jepson, M.
    Bushe, B.
    Thotakura, S.
    Chiles, Ch.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918592.pdf
    Data publikacji:
    2018-06-21
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    colitis
    myocarditis
    ST segment elevation
    coronary vasospasm
    Opis:
    An ST-segment elevation myocardial infarction represents a time-sensitive cardiac pathology with utmost importance placed upon timely coronary angiography with percutaneous coronary intervention. While emphasis is placed on atherosclerotic or thrombotic coronary occlusion, it is important to recognize other etiologies which may present in a similar fashion. This case demonstrates a 71-year-old female patient with prior coronary artery disease and stenting who presented with acute abdominal pain and elevated cardiac biomarkers as well as ST-segment elevation on initial EKG. Coronary angiography revealed only mild to moderate coronary lesions and patent stents while echocardiography was essential unchanged from prior evaluation. Computed tomography of the abdomen would show findings suggestive of infectious colitis and empiric antibiotics led to full resolution of symptoms. While no definitive cause for her cardiac manifestations was discovered, the authors propose coronary vasospasm or myo-pericarditis as likely etiologies in response to an overwhelming inflammatory state. The case underscores the importance of formulating a comprehensive differential diagnosis during the initial workup of a ST-segment elevation myocardial infarction.
    Źródło:
    Progress in Health Sciences; 2018, 8(1); 225-230
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A possible role of chitin in the pathogenesis of asthma and allergy
    Autorzy:
    Brinchmann, B.Ch.
    Bayat, M.
    Brogger, T.
    Muttuvelu, D.V.
    Tjonneland, A.
    Sigsgaard, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/51618.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2011, 18, 1
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemistry and Tectonic Environments of Aphibolites Bethampudi Anorthosite Complex, Khammam Schist Belt, Telangana, India
    Autorzy:
    Brahmaiah, T.
    Ravi, Ch.
    Basha, U. Imran
    Prasad, K. S. Sai
    Powiązania:
    https://bibliotekanauki.pl/articles/1075430.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    E-MORB and Subduction zone
    Geochemistry and Tectonic Environments
    MORB
    N-MORB
    Tholeiitic
    Opis:
    The Bethampudi anorthosite complex is essentially a leucograbbro (gabboric anorthosite and anorthositic gabbro), anorthosites, amphibolites, and pegmatite occur as concordant or discordent bodies. This work involves detailed geological geochemical investigations of amphibolites so as to reveal their possible protolith. The field relaltions, major, trace and rare earth element compositions of ampbibolites suggest that they are petrogenetically related to anorthosites by fractional crystallisation. Protoliths of the amphibolites show a tholeiitic signature that prevails over the sub-alkaline nature and E-MORB affinities. They were generated from a depleted mantle surface with the influence of a subduction and within-plate components.
    Źródło:
    World Scientific News; 2019, 126; 65-87
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of the capillary pressure-saturation pore-size distribution parameter on geological carbon sequestration estimates
    Autorzy:
    Cheng, Ch.-L.
    Perfect, E.
    Yu, T. E.
    Gragg, M. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/91981.pdf
    Data publikacji:
    2017
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    geological carbon sequestration
    numerical modeling
    capillary pressure
    saturation
    cost estimate
    geologiczna sekwestracja węgla
    modelowanie numeryczne
    ciśnienie kapilarne
    nasycenie
    szacowanie kosztów
    Opis:
    Cost estimates for geologic carbon sequestration (GCS) are vital for policy and decision makers evaluating carbon capture and storage strategies. Numerical models are often used in feasibility studies for the different stages of carbon injection and redistribution. Knowledge of the capillary pressure-saturation function for a selected storage rock unit is essential in applications used for simulating multiphase fluid flow and transport. However, the parameters describing these functions (e.g. the van Genuchten m pore size distribution parameter) are often not measured or neglected compared to other physical properties such as porosity and intrinsic permeability. In addition, the use of average instead of point estimates of m for numerical simulations of flow and transport can result in significant errors, especially in the case of coarse-grained sediments and fractured rocks. Such erroneous predictions can pose great risks and challenges to decision-making. We present a comparison of numerical simulation results based on average and point estimates of the van Genuchten m parameter for different porous media. Forward numerical simulations using the STOMP code were employed to illustrate the magnitudes of the differences in carbon sequestration predictions resulting from the use of height-averaged instead of point parameters. The model predictions were converted into cost estimates and the results indicate that varying m values in GCS modeling can cause cost differences of up to hundreds of millions dollars.
    Źródło:
    Journal of Sustainable Mining; 2017, 16, 3; 67-72
    2300-1364
    2300-3960
    Pojawia się w:
    Journal of Sustainable Mining
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetization Reversal in Cobalt Nanocolumn Structures Obtained by Glancing Angle Deposition
    Autorzy:
    Buchta, K.
    Schmidt, Ch.
    Trykowski, G.
    Biniak, S.
    Kempiński, M.
    Luciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1428548.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Ak
    73.50.-h
    73.61.-r
    Opis:
    An advanced deposition technique known as glancing angle deposition was used to fabricate randomly seeded magnetic cobalt columnar nanostructures. The existence of nanocolumns was confirmed by the cross-section scanning electron microscopy. The evolution in the magnetization reversal mechanism as a function of the film thickness was investigated. The coercivity $H_{C}$ and $M_{R}//M_{S}$ ratio (where $M_{R}$ and $M_{S}$ denote the remanent and saturation magnetization, respectively), derived from the magnetic hysteresis loops, are discussed as a function of the angle between the external magnetic field and the surface normal. The direction of the magnetization easy/hard axis and the columns inclination angle were determined on the basis of the angular dependences of the $H_{C}$ and the $M_{R}//M_{S}$. A crossover from the coherent rotation, based on the Stoner-Wohlfarth model, to the curling reversal mode was observed.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1222-1224
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication Of Porous Ti By Thermal Decomposition And Sintering Of PMMA/TiH2 Powder Compact
    Wytwarzanie porowatego tytanu przez rozkład termiczny i spiekanie wyprasek PMMA/TiH2
    Autorzy:
    Jeon, K. Ch.
    Kim, Y. D.
    Suk, M.-J.
    Oh, S.-T.
    Powiązania:
    https://bibliotekanauki.pl/articles/352341.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    porous Ti
    PMMA powders
    thermal decomposition of TiH2
    pore structure
    porowaty tytan
    PMMA
    rozkład termiczny
    struktura porów
    Opis:
    Porous Ti with controlled pore structure was fabricated by thermal decomposition and sintering process using TiH2 powders and Polymethylmethacrylates (PMMA) beads as pore forming agent. The beads sizes of 8 and 50 μm were used as a template for fabricating the porous Ti. The TiH2 powder compacts with 20 and 70 vol% PMMA were prepared by uniaxial pressing and sintered for 2 h at 1100°C. TGA analysis revealed that the PMMA and TiH2 were thermally decomposed at about 400°C forming pores and at about 600°C into metallic Ti phase. The porosity increased with increase in the amount of PMMA addition. Also, the microstructure observation showed that the pore size and shape were strongly dependent on the PMMA shapes.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1375-1377
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Establishment of feline in-house reference intervals for hematologic and biochemical parameters and potential age-related differences
    Autorzy:
    Lin, T.L.
    Chung, S.H.
    Sung, C.H.
    Yeh, S.Y.
    Cheng, T.L.
    Chou, C.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087480.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    feline
    reference interval
    age
    transference study
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 3; 599-608
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Qualitative and quantitative evaluation of secondary metabolites of different plant extracts of Nothapodytes foetida (Wight) Sleumer an important endangered medicinal tree
    Autorzy:
    Bai, D. Sunitha
    Suvarchala, V.
    Pavani, Ch.
    Chaithanya, G.
    Spoorthi, V.
    Shasthree, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839343.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Camptothecin
    phytochemicals
    alkaloids
    flavonoids
    glycosides
    tannins
    phenols
    triterpenoids
    saponins
    Nothapodytes foetida
    Opis:
    The present study of phytochemical screening has revealed valuable information about the chemical constituents of Nothapodytes foetida. Phytochemical analysis of leaves, stem, bark and root extracts of Nothapodytes foetida was performed using different solvent systems such as chloroform, butanol, hexane, methanol and acetonitrile for the presence of different phytochemicals with standard procedures. The phytochemical screening (both qualitative and quantitative) of variousplant extracts of Nothapodytes foetida revealed the presence of different phytoconstituents such as alkaloids, flavonoids, glycosides, tannins, phenols and triterpenoids. Among all the solvents tested, methanol, butanol and chloroform extract of leaf, stem, bark and root showed high concentration of all phytoconstituents compared to hexane and acetonitrile solvent extracts. The total quantity of secondary metabolites was evaluated by using the standard procedures and the line of regression and the regression coefficient estimated from the calibration curve of various standards. The highest quantity of phytoconstituent present in the plant extracts was identified to be alkaloids. The alkaloid content of leaf was evaluated to be 66.11±0.47, whereas stem possess 56.27±0.38, bark 59.02±0.17 and root 62.34±0.27 mg AE/gm of extracts and subsequent high amounts of phytoconstituents identified was flavonoids, tannins, phenols and saponins. Phytochemical screening of Nothapodytes foetidaused in the medical field for the design of new drugs.
    Źródło:
    World Scientific News; 2021, 162; 43-59
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Footwear and Equipment on Stride Length and Range of Motion of Ankle, Knee and Hip Joint
    Autorzy:
    Schulze, Ch.
    Lindner, T.
    Woitge, S.
    Schulz, K.
    Finze, S.
    Mittelmeier, W.
    Bader, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/306456.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    analiza chodu
    sprzęt wojskowy
    biomechanika
    gait analysis
    goniometry
    military equipment
    oversue syndromes
    Opis:
    Purpose: Footwear and equipment worn by military personnel is of importance for them to be able to meet the physical demands specific to their profession daily activities. Aim of the present study was to investigate by means of gait analysis how army-provided footwear and equipment influence the range of motion of hip, knee and ankle joints as well as stride length.Methods: Thirty-two soldiers were subjected to gait analysis on a treadmill by way of video recordings and goniometric measurements. Results: The stride length increased when military shoes are worn. We found no influence on stride length in connection to increased loading. The weight of the shoes represents the decisive factor. Neither shoes nor equipment changed the range of motion of the knee joint.Weight of equipment affected range of motion of the hip joint. The range of motion of the upper and lower ankle joints was mainly influenced by the properties of the shoes. Conclusions: Military footwear and weight of equipment influence stride length and range of motion of joints of the lower extremities in a specific way. Shape of material is the decisive factor.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2014, 16, 4; 45-51
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Absorption of Thin ZnSe, ZnS and ZnS$\text{}_{x}$Se$\text{}_{1-x}$ Films under High Hydrostatic Pressure
    Autorzy:
    Griebl, E.
    Schőtz, G.
    Birzer, Ch.
    Kerner, W.
    Reisinger, T.
    Hahn, B.
    Gebhardt, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1934060.pdf
    Data publikacji:
    1995-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.61.Ga
    71.35.+z
    Opis:
    We present absorption measurements on free-standing ZnSe, ZnS and ZnS$\text{}_{x}$Se$\text{}_{1-x}$ films (d = 0.4...2 μm) under hydrostatic pressure up to 15 GPa. The refraction index n(λ,P) of ZnS and ZnSe in the transparent region up to 800 nm and the pressure shift of the E0 absorption edge of ZnSe and some ZnS$\text{}_{x}$Se$\text{}_{1-x}$-compositions was investigated at 293 K. At 2 K free exciton states near the E$\text{}_{0-}$ and E$\text{}_{0}$ + Δ$\text{}_{0}$-gap are visible in absorption. Increase in the Rydberg energy under pressure was found, which is explained with k • p-theory in the framework of the hydrogen model.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 5; 995-999
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biomechanical study of the influence of the weight of equipment on selected trunk muscles
    Autorzy:
    Schulze, Ch.
    Lindner, T.
    Woitge, S.
    Glass, A.
    Fimze, S.
    Mittelmeier, W.
    Bader, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/306939.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    activity
    EMG
    equipment
    posture
    aktywność
    postawa
    Opis:
    Overexertion and pain of the musculoskeletal system may occur partly owing to load application by the equipment. Both the weight of equipment and the duration of loading are relevant. The aim of the present study was to examine the extent of loading and resultant strain in the trunk muscles. Therefore, the trunk posture of soldiers and muscular activity in reaction to different equipment components (helmet, load-carrying equipment, gun and backpack) were evaluated. Electromyography was performed and a visual assessment of body axis was conducted based on standardised planar images. Data indicate that the activity of the trunk muscles examined (latissimus dorsi, trapezius and pectoralis major) is dependent on the weight and distribution of the equipment components. Activity in the trapezius muscle, for instance, was doubled during specific load application. Moreover, the method of carrying the rifle had a significant influence on the activity of the trapezius muscle (one-sided decrease of activity by 50%). Subjects were able to stabilise the body axis in the coronal plane through increased muscle activity, however, in the sagittal plane a compensatory ventral inclination of the body was observed. Uneven load distribution can lead to an irregular strain on the musculoskeletal system.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 3; 45-51
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Powerful – development of engine and vehicle to realise low CO2-emissions
    Powerful – rozwój silnika i pojazdu o małej emisji CO2
    Autorzy:
    Weißner, M.
    Wrede, K.
    Watzl, S.
    Menzel, T.
    Schüttenhelm, M.
    Klüting, Ch. B.
    Frambourg, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/133543.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    TDI
    downsizing
    Low Temperature Combustion
    LTC
    carbon dioxide
    alternative fuel
    low emission
    spalanie LTC
    spalanie niskotemperaturowe
    emisja dwutlenku węgla
    paliwa alternatywne
    mała emisja
    Opis:
    The EU funded project “Powerful” supported the creation of new solutions to reduce fuel consumption and emission levels below current levels. The task of the related project, performed with a Golf 6 Variant TDI® BMT, is the achievement of 98 g CO2/km in NEDC under respect of EU6 minus 10% emission limits. This article describes the general activities undertaken regarding the overall technical approach, the efforts of developing the research engine, it´s integration into a special validator vehicle and the main results. Some technical features like LTC (Low Temperature Combustion) or heat storage system of engine and vehicle are described more detailed. Beside the NEDC also more dynamic cycles have been investigated including real world driving.
    Finansowany przez UE projekt "Powerful" wspiera tworzenie nowych rozwiązań, w celu zmniejszenia zużycia paliwa i obniżenia emisji związków toksycznych poniżej obecnie obowiązujących poziomów. W ramach projektu wykonano badania na pojeździe Golf 6 Variant TDI® BMT, osiągając poziom emisji 98 g CO2/km w teście NEDC względem normy Euro 6 minus 10% wielkości emisji. W artykule opisano ogólne działania podejmowane w zakresie podejścia koncepcyjnego, rozwijania koncepcji na silniku badawczy, integracji zaproponowanych rozwiązań w specjalnym pojeździe weryfikującym oraz przedstawiono główne wyniki badań. Niektóre koncepcje jak LTC (spalanie niskotemperaturowe) oraz systemu magazynowania ciepła z silnika i pojazdu zostały opisane bardziej szczegółowo. Oprócz testu NEDC przeprowadzono również badania w cyklach jezdnych odwzorowujących rzeczywiste warunki jazdy.
    Źródło:
    Combustion Engines; 2014, 53, 2; 3-21
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sire pedigree error estimation and sire verification of the Taiwan dairy cattle population by using SNP markers
    Autorzy:
    Chao, C.H.
    Yeh, Y.H.
    Chen, Y.M.
    Lee, K.H.
    Wang, S.H.
    Lin, T.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539078.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Holstein cattle
    genetic testing
    sire pedigree
    Opis:
    Information regarding the correct pedigree of and relationship between animals is useful for managing dairy breeding, reducing inbreeding, estimating breeding value, and establishing correct breeding programs. Additionally, the successful implementation of progeny testing is crucial for improving the genetics of dairy cattle, which depends on the availability of correct pedigree information. Incorrect pedigree information leads to bias in bull evaluation. In this study, Neogen GeneSeek Genomic Profiler (GGP) 50K SNP chips were used to identify and verify the sire of Taiwanese Holstein dairy cattle and analyze the reasons that lead to incorrect sire records. Samples were collected from 2,059 cows of 36 dairy farms, and the pedigree information was provided by breeders. The results of sire verification can be divided into three categories: submitted unconfirmed sire, submitted confirmed sire, and incorrectly submitted verified sire. Data on the sires of 1,323 (64.25%) and 572 (27.78%) dairy cows were verified and discovered, respectively. Sires of 1,895 (92.03%) dairy cattle were identified, which showed that the paternal pedigree of dairy cattle could be discovered and verified through genetic testing. An error-like analysis revealed that the data of 37 sires were incorrectly recorded because the bull’s NAAB code number was incorrectly entered into the insemination records: for 19 sires, the wrong bull was recorded because the frozen semen of a bull placed in the wrong storage tank was used, 6 had no sire records, and for 12 sires, the NAAB code of the correct bull was recorded but with a wrong stud code, marketing code, or unique number for the stud or breed. To reduce recorded sire error rates by at least 27.78%, automated identification of the mated bull must be adopted to reduce human error and improve dairy breeding management on dairy farms.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 1; 61-65
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pathogenesis and prevention of dysbaric osteonecrosis
    Autorzy:
    Kawashima, M.
    Tamura, H.
    Noro, Y.
    Takao, K.
    Kitano, M.
    Lehner, Ch. E.
    Taya, Y.
    Mano, Y.
    Tsunosue, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/366585.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
    Tematy:
    dysbaric osteonecrosis
    pathogenesis
    bone compartment syndrome
    hypercoagulability
    decompression sickness
    bends
    Opis:
    Japanese diving fishermen are known to have a high prevalence of dysbaric osteonecrosis. Their typical dive practices are characterized by long exposure to high pressure and by repetitive diving. The etiology of dysbaric osteonecrosis still remains controversial. Because the development of dysbaric osteonecrosis may occur silently, the diver may be unaware of the actual ischemic event. Moreover, key etiologic evidence is often lost before the diver is examined. The early stage of dysbaric osteonecrosis was evaluated in four autopsy cases of divers who died of acute decompression sikness. Hypercoagulability of blood was present in these cases. Hypercoagulability of blood has also been observed in experimental rats after decompression. Dysbaric osteonecrosis has been experimentally induced in six sheep at the University of Wisconsin - Madison. These findings are reviewed by comparing dysbaric osteonecrosis in both divers and experimental animals. In conclusion, a bone compartment syndrome and hypercoagulability appear to be pathogenetic factors in dysbaric osteonecrosis.
    Źródło:
    Polish Hyperbaric Research; 2005, 3(12); 13-18
    1734-7009
    2084-0535
    Pojawia się w:
    Polish Hyperbaric Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Volatile profiles of toxigenic and non-toxigenic Aspergillus flavus using SPME for solid phase extraction
    Autorzy:
    De, Lucca A J
    Boue, S.M.
    Carter-Wientjes, C.H.
    Bland, J.M.
    Bhatnagar, D.
    Cleveland, T.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/50286.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    Aspergillus flavus
    toxigenic strain
    non-toxigenic strain
    secondary metabolite
    aflatoxin
    maize
    volatile profile
    solid-phase microextraction
    solid-phase extraction
    potato
    isolate
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2010, 17, 2; 301-308
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Colloidal crystal cladded microfiber for refractive index sensing
    Autorzy:
    Yan, H. T.
    Zhao, X Y
    Zhang, Ch.
    Zhen, Z Q
    Li, Q Z
    Cao, J X
    Xia, L X
    Powiązania:
    https://bibliotekanauki.pl/articles/174902.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    microfibers
    colloidal crystals
    refractive index sensing
    Opis:
    We investigate the evanescent field of a microfiber wrapped by colloidal crystals. The microfiber has the diameter of about 1 μm that is drawn from a single-mode fiber with an alcohol lamp. The colloidal spheres are further attached to the microfiber through thermal evaporation, then they self-assemble to crystal-like structures. The 400 nm, 590 nm, and 710 nm-diameter SiO2 colloidal spheres are used, respectively. The spectral responses are studied theoretically and experimentally, and the results agree with each other. It is revealed that the evanescent field of a microfiber could be modulated by the photonic band-gap of colloidal crystals. This characteristic is very useful in refractive index sensing for liquids.
    Źródło:
    Optica Applicata; 2014, 44, 2; 309-315
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Muon Spin Rotation Studies of the Vortex Matter in the High-T$\text{}_{c}$ Superconductor Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8+δ}$
    Autorzy:
    Blasius, T.
    Niedermayer, Ch.
    Tallon, J. L.
    Pooke, D. M.
    Golnik, A.
    Noakes, D. R.
    Stronach, C. E.
    Ansaldo, E. J.
    Henn, R. W.
    Lin, C. T.
    Bernhard, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011022.pdf
    Data publikacji:
    1999-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.60.Ge
    74.25.Dw
    74.72.Hs
    76.75.+i
    Opis:
    We report muon spin rotation studies of the magnetic field distribution n(B) in the vortex state of the high-temperature superconductor Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8+δ}$. From our data on three sets of overdoped, nearly optimized and underdoped single crystals we obtain evidence for a two-stage melting process of the vortex matter under equilibrium conditions. In the irreversible regime well below the irreversibility line we observe a transition in the vortex state which we associate with an intra-planar melting transition. The resulting flux-line liquid phase persists over a sizeable temperature interval before the inter-planar decoupling of the individual vortex lines takes place in a second step at the irreversibility line, resulting in a pancake liquid phase.
    Źródło:
    Acta Physica Polonica A; 1999, 96, 2; 245-258
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical infrared-sensor inside the cylinder to determine the EGR- and residual gas rate in diesel engine
    Optyczny czujnik podczerwieni wewnątrz cylindra w celu określenia recyrkulacji spalin i reszty spalin w silniku wysokoprężnym
    Autorzy:
    Vanhaelst, R.
    Thiele, O.
    Berg, T.
    Hahne, B.
    Stellet, H.-P.
    Wildhagen, F.
    Hentschel, W.
    Joerdens, Ch.
    Czajka, J.
    Wisłocki, K.
    Pielecha, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/133337.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    exhaust gas recirculation (EGR)
    IR sensors
    engine research
    recyrkulacja spalin
    czujnik podczerwieni
    badania silnikowe
    Opis:
    To meet the increased demands of new exhaust and CO2 limits a research project of Volkswagen R&D, the Technical University of Poznan and the Ostfalia University of Applied Sciences has been initiated; its main target was the development and adaptation ICOS (Internal Combustion Optical Sensor) – an infrared sensor of LaVision for on-line measurements of EGR-rate in cylinder of an engine under operation. The objective of the project was to determine by different optical signals the CO2 concentration, the EGR rate and residual gas which are cycle-resolved in the cylinder. In this paper the principle of measurement of optical indication has been described. The infrared sensor was validated by a one-cylinder diesel engine and compared to a synchronously running fast gas sampling system (CSV). Finally the practical application of various parameter variations is illustrated in the determination of the EGR and residual gas rate. Thus a new measurement technique for the development of future generations of engines introduced.
    Aby umożliwić spełnienie wymagań nowych norm emisji spalin oraz spełnić limity emisji CO2 podjęto projekt badawczy z udziałem: Volkswagen R&D, Politechniki Poznańskiej i Ostfalia University of Applied Sciences; jego głównym celem był rozwój i adaptacja ICOS (Internal Combustion Optical Sensor) – czujnika podczerwieni firmy LaVision dla bieżących pomiarów stopnia recyrkulacji spalin w cylindrze pracującego silnika. Celem projektu było określenie na podstawie różnych sygnałów optycznych wartość stężenia CO2, stopnia recyrkulacji spalin (EGR – rate) oraz ilości spalin, które znajdują się w cylindrze przed rozpoczęciem procesu spalania. W artykule przedstawiono zasadę pomiaru zawartości spalin z wykorzystaniem czujnika optycznego. Możliwość zastosowania czujnika podczerwieni została potwierdzona przez badania na jednocylindrowym silniku wysokoprężnym, a otrzymane wyniki porównano z systemem do szybkiego pobierania próbek gazu (CSV). Przedstawiono również wyniki pozwalające na określenie recyrkulacji spalin oraz reszty spalin przy różnych parametrach pracy silnika. Nowa technika pomiarowa pozwala na dostosowanie nowoczesnych silników spalinowych do przyszłych norm ochrony środowiska i tworzy podstawę dla rozwoju przyszłych generacji silników spalinowych.
    Źródło:
    Combustion Engines; 2013, 52, 3; 3-11
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Projekt MATLAS - Zaawansowane metody inżynierii materiałowej w diagnostyce dzieł sztuki poddanych renowacji laserowej za pomocą kształtowanych, wysokoenergetycznych impulsów promieniowania
    MATLAS project - Advanced methods of materials engineering in diagnostics of art works after renovation by means of shaped, high-energy laser radiation pulses
    Autorzy:
    Ciupiński, Ł.
    Fortuna-Zaleśna, E.
    Garbacz, H.
    Onyszczuk, T.
    Koss, A.
    Mróz, J.
    Zatorska, A.
    Chmielewski, K.
    Jeżewska, E.
    Zambrzycki, P.
    Jeziorowski, M.
    Marczak, J.
    Strzelec, M.
    Sarzyński, A.
    Ostrowski, R.
    Skrzeczanowski, W.
    Rycyk, A.
    Spaarschuh, Ch.
    Wedvik, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/217530.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Konserwatorów Zabytków
    Tematy:
    dzieło sztuki
    projekt MATLAS
    inżynieria materiałowa
    art work
    MATLAS project
    materials engineering
    Opis:
    Projekt MATLAS PL0259, realizowany w ramach Mechanizmu Finansowego EOG/Norweskiego Mechanizmu Finansowego, w Obszarze Priorytetowym "Konserwacja Europejskiego Dziedzictwa Kultury", został z powodzeniem rozpoczęty w lipcu 2008 r. Naukowe cele projektu obejmują opracowanie metod diagnostyki powierzchni dzieł sztuki wykonanych z metali (stopów) w celu ich bezpiecznej renowacji laserowej, opracowanie systemu laserowego zdolnego do generacji impulsów o wymaganym w renowacji, kontrolowanym kształcie i czasie trwania oraz analizy zjawisk indukowanych przez impulsy laserowe na powierzchni obiektów historycznych. Artykuł przedstawia uczestniczące w projekcie ośrodki naukowe, projekt i wykonanie laserowego systemu czyszczącego oraz metodykę badań eksperymentalnych. Podsumowuje on również najnowsze wyniki projektu oraz przedstawia metalowe dzieła sztuki wybrane do badań, wraz z ich analizami historycznymi i strukturalnymi.
    MATLAS project PL0259 successfully started in July 2008 under the EEA Financial Mechanism/ Norwegian Financial Mechanism and in the Key Priority Section "Conservation of European Cultural Heritage". The scientific aims of the project include: development of diagnostic methods for analysis of metal (alloy) artworks surfaces for safe laser renovation; development of a laser system capable of generating pulses with controlled shape and time duration required for renovation, and analysis of phenomena induced by laser pulses in the treated surfaces of historical objects. The paper presents participating scientific teams, design and realization of laser cleaning system and methodology of experimental investigations. It also summarizes the latest project results and presents metal artworks selected for examination with their historical and structural analysis.
    Źródło:
    Wiadomości Konserwatorskie; 2010, 27; 171-176
    0860-2395
    2544-8870
    Pojawia się w:
    Wiadomości Konserwatorskie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanostructural Superconducting Materials for Fault Current Limiters and Cryogenic Electrical Machines
    Autorzy:
    Prikhna, T.
    Gawalek, W.
    Savchuk, Ya.
    Sergienko, N.
    Moshchil, V.
    Sokolovsky, V.
    Vajda, J.
    Tkach, V.
    Karau, F.
    Weber, H.
    Eisterer, M.
    Joulain, A.
    Rabier, J.
    Chaud, X.
    Wendt, M.
    Dellith, J.
    Danilenko, N.
    Habisreuther, T.
    Dub, S.
    Meerovich, V.
    Litzkendorf, D.
    Nagorny, P.
    Kovalev, L.
    Schmidt, Ch.
    Melnikov, V.
    Shapovalov, A.
    Kozyrev, A.
    Sverdun, V.
    Kosa, J.
    Vlasenko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1549637.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Sv
    74.81.Bd
    74.70.Ad
    74.78.Na
    74.62.Fj
    74.25.Ld
    74.62.Dh
    74.25.Ha
    Opis:
    Materials of the Y-Ba-Cu-O (melt-textured $YBa_{2}Cu_{3}O_{7-δ}$-based materials or MT-YBCO) and Mg-B-O ($MgB_{2}$-based materials) systems with high superconducting performance, which can be attained due to the formation of regularly distributed nanostructural defects and inhomogeneities in their structure can be effectively used in cryogenic technique, in particular in fault current limiters and electrical machines (electromotors, generators, pumps for liquid gases, etc.). The developed processes of high-temperature (900-800°C) oxygenation under elevated pressure (16 MPa) of MT-YBCO and high-pressure (2 GPa) synthesis of $MgB_{2}$-based materials allowed us to attain high superconductive (critical current densities, upper critical fields, fields of irreversibility, trapped magnetic fields) and mechanical (hardness, fracture toughness, Young modulus) characteristics. It has been shown that the effect of materials properties improvement in the case of MT-YBCO was attained due to the formation of high twin density (20-22 $μm^{-1}$), prevention of macrocracking and reduction (by a factor of 4.5) of microcrack density, and in the case of $MgB_{2}$-based materials due to the formation of oxygen-enriched as compared to the matrix phase fine-dispersed Mg-B-O inhomogeneities as well as inclusions of higher borides with near-$MgB_{12}$ stoichiometry in the Mg-B-O matrix (with 15-37 nm average grain sizes). The possibility is shown to obtain the rather high $T_{c}$ (37 K) and critical current densities in materials with $MgB_{12}$ matrix (with 95% of shielding fraction as calculated from the resistant curve).
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 7-14
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-33 z 33

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies