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    Wyświetlanie 1-73 z 73
    Tytuł:
    Nonlinear inverse solution by the look-up table method for Risley-prism-based scanner
    Autorzy:
    Li, A.
    Sun, W.
    Gao, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/173899.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    risley prism
    lookup table method
    inverse solution
    scanner
    Opis:
    A pair of rotation Risley prisms can perform superior optical pointing and tracking functions with large visual field and high accuracy. Crucial to the function implementation are the nonlinear inverse solutions to the double-prism orientation angles for tracking a given target trajectory. In the paper, a novel look-up table method is proposed to solve this problem. Because there are two groups of solutions to the rotation angles achieved from an arbitrary target point, a "jump" phenomenon occurs and generates the discontinuous curves of multi-group rotation angle solutions. According to the mapping relation between the coordinate values of the target point and the corresponding rotation angles of two prisms, we can establish the continuous solution curves by adding constraints and employing an optimization algorithm. Experimental results validate the obtained inverse solutions applicable to scan a trajectory close to the given one within an error threshold. The proposed look-up table method can provide foundation for the continuous control of the Risley-prism-based scanner in its inverse applications.Keywords: Risley prism, look-up table method, inverse solution, scanner.
    Źródło:
    Optica Applicata; 2016, 46, 4; 501-515
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Yellowfin tuna (Thunnusalbacares) fishing ground forecasting model based on bayes classifier in the South China Sea
    Autorzy:
    Zhou, W.
    Li, A.
    Ji, S.
    Qiu, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/258994.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Bayes classifier
    South China Sea
    yellowfin tuna
    fishing ground forecasting
    Opis:
    Using the yellowfin tuna (Thunnusalbacares,YFT)longline fishing catch data in the open South China Sea (SCS) provided by WCPFC, the optimum interpolation sea surface temperature (OISST) from CPC/NOAA and multi-satellites altimetric monthly averaged product sea surface height (SSH) released by CNES, eight alternative options based on Bayes classifier were made in this paper according to different strategies on the choice of environment factors and the levels of fishing zones to classify the YFT fishing ground in the open SCS. The classification results were compared with the actual ones for validation and analyzed to know how different plans impact on classification results and precision. The results of validation showed that the precision of the eight options were 71.4%, 75%, 70.8%, 74.4%, 66.7%, 68.5%, 57.7% and 63.7% in sequence, the first to sixth among them above 65% would meet the practical application needs basically. The alternatives which use SST and SSH simultaneously as the environmental factors have higher precision than which only use single SST environmental factor, and the consideration of adding SSH can improve the model precision to a certain extent. The options which use CPUE’s mean ± standard deviation as threshold have higher precision than which use CPUE’s 33.3%-quantile and 66.7%-quantile as the threshold
    Źródło:
    Polish Maritime Research; 2017, S 2; 140-146
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High-Coercivity FePt Nanoparticle Assemblies Embedded in Oxide-Matrix by Atomic Layer Deposition
    Autorzy:
    Kong, J.
    Li, A.
    Gao, M.
    Yan, Q.
    Wu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399662.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Vv
    75.75.Cd
    75.50.Bb
    75.50.Ss
    Opis:
    Self-assembled face-centered cubic FePt nanoparticles were embedded into the oxide capping layer using the atomic layer deposition technology. The effect of the oxide-matrix layer on the structure, mono-dispersibility, and magnetic properties of the FePt/oxide composite thin films was investigated. Experimental results suggest that the protection of the oxide-matrix capping layer can effectively inhibit the grain growth and particle aggregation, and preserve the ordered domains of the FePt nanoparticles during the L 1_0 ordering transition through annealing. The combination of the atomic layer deposition capping layer and self-assembled FePt nanoparticles provides a new potential approach to fabricate the ultrahigh-density magnetic recording media.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 173-176
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Convection rolls and individual particles movements in horizontally vibrated granular particles system
    Autorzy:
    Rehman, A.
    Wu, Ping
    Li, Li
    Zhang, Shiping
    Wang, Li
    Powiązania:
    https://bibliotekanauki.pl/articles/1058505.pdf
    Data publikacji:
    2016-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    45.70.-n
    47.57.Gc
    47.52.+j
    47.57.Qk
    83.80.Fg
    Opis:
    Convection in horizontally vibrated granular systems is significant for scientists and engineers for their importance in the field of mining, geo-physics, and pharmaceutical etc. This research work studied three types of convection rolls, "Homogeneous convection roll", "lower-right diagonal convection roll" and "upper-right diagonal convection roll" which occurred in a square container filled with binary granular particles mixture of sized d=(4.0±0.2) mm and d=(8.0±0.2) mm. Container was vibrated horizontally with low frequencies f and low dimensionless acceleration Γ. Helical movement was observed along the walls perpendicular to direction of motion while straight-line movement along the walls horizontal to direction of motion. Helical and straight-line movements of particles along the walls are the part of convection rolls. A heap appeared due to vibration, which has dominant effect on the convection rolls. Heap position is function of frequency f and dimensionless accelerations Γ.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 6; 1336-1342
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigation on the Impact Behaviour of Composite Laminate
    Eksperymentalne badania laminatów kompozytowych poddanych działaniu udaru
    Autorzy:
    Azzam, A
    Li, W
    Powiązania:
    https://bibliotekanauki.pl/articles/233221.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    stacking sequences
    low velocity impact
    C-scan
    three-point bending
    delamination
    działanie udaru
    laminaty kompozytowe
    sekwencje układania
    mały wpływ na prędkość
    system trzech punktów
    rozwarstwianie
    Opis:
    The impact response of a composite laminate structure was investigated by subjecting several stacking sequences of a composite laminate structure to low velocity impact loading using a Drop-Weight Machine (CEAST 9350 drop tower) and three-point bending using an electronic universal tester (Type: WDW-20) machine. The air-coupled ultrasonic C-scan technique (NAUT21) was selected in order to characterise the impact damage size, delamination, flaw detection, and damage in composite laminate structures. The failure processes of damaged specimens for impact energy (5 J) were evaluated by comparing load-displacement curves and images of damaged samples taken from impacted sides through a C-scan.
    Badano odpowiedź na udar struktury laminatów kompozytowych. Zastosowano kilka sekwencji udarów charakteryzujących się małą prędkością. Stosowano specjalną maszynę umożliwiającą opadanie obciążenia (wieża udarowa). Zginanie następowało w systemie trzech punktów podparcia. Zastosowano sprzężoną technikę ultradzwiękowego skanowania dla scharakteryzowania wielkości uszkodzeń w wyniku udaru, delaminację warstw i zmiany strukturalne. Dla scharakteryzowania uszkodzeń materiału badawczego powstałych przy energii udaru 5J wykorzystano porównanie wykresów obciążenie-przesunięcie i zdjęć uszkodzonych próbek.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 1 (109); 77-84
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Global and distributed torque calculations using the CDSA approach
    Autorzy:
    Li, M.
    Lowther, D.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/140380.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    moment obrotowy
    analiza wrażliwości
    maszyna elektryczna
    torque calculation
    distributed torques
    sensitivity analysis
    electrical machines
    Opis:
    Accurate force and torque calculations are fundamental to being able to predict the operation of an electromechanical device or system. The Maxwell stress tensor and the virtual work principle are the two major theories for force and torque calculation. However, if local distributions of torque are needed to couple to structural and vibration analyses, the conventional Maxwell stress approach cannot provide this easily. A recently developed approach based on sensitivity analysis has the capability to deliver local stress and torque as well as accurate global results. In addition, this approach divides the total torque into different components which are essential to the design of electrical devices. This paper includes several numerical examples of torque calculations of different electrical machines. The results are verified by a commercial software package using the Maxwell stress based force calculation.
    Źródło:
    Archives of Electrical Engineering; 2011, 60, 4; 459-471
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A linear programming based analysis of the CP-rank of completely positive matrices
    Autorzy:
    Li, Y.
    Kummert, A.
    Frommer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/907323.pdf
    Data publikacji:
    2004
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    macierz pozytywna
    programowanie liniowe
    algorytm Simplex
    completely positive matrices
    cp-rank
    linear programming
    simplex algorithm
    basic feasible solution
    pivot process
    Opis:
    A real matrix A is said to be completely positive (CP) if it can be decomposed as A= B BT, where the real matrix B has exclusively non-negative entries. Let k be the rank of A and Phik the least possible number of columns of the matrix B, the so-called completely positive rank (cp-rank) of A. The present work is devoted to a study of a general upper bound for the cp-rank of an arbitrary completely positive matrix A and its dependence on the ordinary rank k. This general upper bound of the cp-rank has been proved to be at most k(k + 1)/2. In a recent pioneering work of Barioli and Berman it was slightly reduced by one, which means that Phik \leq k(k + 1)/2-1 holds for k \geq 2. An alternative constructive proof of the same result is given in the present paper based on the properties of the simplex algorithm known from linear programming. Our proof illuminates complete positivity from a different point of view. Discussions concerning dual cones are not needed here. In addition to that, the proof is of constructive nature, i.e. starting from an arbitrary decomposition A= B1 B1T (B1\geq 0) a new decomposition A= B2 B2T (B2\geq 0) can be generated in a constructive manner, where the number of column vectors of B2 does not exceed k(k + 1)/2-1. This algorithm is based mainly on the well-known techniques stemming from linear programming, where the pivot step of the simplex algorithm plays a key role.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2004, 14, 1; 25-31
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of Rascheltronic Vamp Fabric with Double-Colour Pitting Effect
    Projektowanie dzianin dwukolorowych z efektem pittingu
    Autorzy:
    Li, X.
    Zhang, A.
    Jiang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/232311.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    warp knitting
    rascheltronic
    vamp fabric
    double-colour pitting effect
    CAD
    projektowanie dzianin dwukolorowych
    wspomaganie komputerowe
    dzianina
    Opis:
    Applications of Piezo jacquard and CAD technology in warp-knitting have provided traditional jacquard fabrics with the possibility of innovating the structure design. Research on innovative design and fabrication is conducted aiming at knitting jacquard vamp fabric with the double-colour pitting effect on a technical back. By utilising Piezoelectric jacquard’s performance of displacing both underlapping and overlapping, new structures are formed, such as mesh stitches, koper stitches and float structures. Based on threading with yarns in two colors, jacquard bars in split execution create a pattern with a double-colour effect. To realize a highly efficient design, the paper proposes a computer-aided jacquard design method covering technical parameters and jacquard pattern design modules. Additionally, to pursue convenience and efficiency, mathematic models are built in terms of an automatic borderline design, loop stitching inspection and structure database. The method of jacquard vamp fabric design with a double-color pitting effect has been proven practically by illustrating a vamp design example which meets the requirement of fashion and performance well.
    Projektowanie dzianin dwukolorowych z efektem pittingu jest możliwe przy użyciu komputerowego systemu projektowania opartego na specjalnej metodzie dziewiarskiej. Dzięki macierzy i modelowi matematycznemu system obejmuje wszystkie podstawowe parametry techniczne modułów projektowego i kontrolnego oraz modułu bazy danych struktur, które współpracują w celu sprawnego projektowania dzianiny. Na podstawie otrzymanych wyników badań stwierdzono, że wspomagana komputerowo metoda projektowania może być z powodzeniem stosowana w projektowaniu dzianin dwukolorowych z efektem pittingu.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2017, 3 (123); 92-97
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Cotton Matured Fibre Quality and the Super-Molecular Structure in Upland Cotton RILs
    Analiza jakości dojrzałych włókien bawełny Upland i jej struktury nadcząsteczkowej
    Autorzy:
    Wang, Y.
    Li, C
    Shang, H
    Li, B
    Liu, A
    Yuan, Y
    Powiązania:
    https://bibliotekanauki.pl/articles/231848.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    upland cotton
    recombinant inbred lines
    fibre super-molecular structure
    fibre quality
    dojrzałe włókna bawełny
    bawełna Upland
    zmodyfikowana genetycznie bawełna
    cechy włókniste bawełny
    super-molekularna struktura włókien
    jakość włókna
    Opis:
    A RIL(recombinant inbred lines) population with 196 F6:9 lines was developed from an F2 population of upland cotton (Gossypium hirsutum L.) cross of sGK9708×0-153. sGK9708 is a commercial transgenic variety with Bt+CpTI genes resistant to budworm and 0-153 with high fibre quality. Five materials with high fibre strength and five materials with low fibre strength from the recombinant inbred lines were researched [1]. Ten materials of super-molecular structure and fibre quality were studied by X-ray diffraction and the HVI900 technique. The results indicated that cotton matured fibre quality should mainly depend on the decrease in the orientational parameter in the crystalline section, especially the orientational separate and orientational distribution angles. The correlation of fibre maturity, linear density and the fibre super-molecular structure is an innovation in the study. Studies on the correlation of cotton fibre quality and the fibre super-molecular structure provide a scientific basis for the improvement cotton fibre quality.
    Artykuł dotyczy badań jakości dojrzałych włókien bawełny amerykańskiej Upland i jej struktury nadcząsteczkowej. Uzyskano zmodyfikowany genetycznie gatunek bawełny amerykańskiej Upland za pośrednictwem sztucznego samozapylenia bawełny wykazującej cechy włókniste (linii wsobnej). Dla uzyskanych w opisany sposób włókien bawełny przeprowadzono wszechstronne badania właściwości fizycznych, a także struktury nadcząsteczkowej. Uzyskane wyniki badań skonfrontowano z właściwościami fizycznymi i strukturą nadczasteczkową tradycyjnej bawełny amerykańskiej Upland posiłkując się w tym celu analizą korelacyjną.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2014, 5 (107); 28-33
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On-the-fly diagnosability analysis of bounded and unbounded labeled Petri nets using verifier nets
    Autorzy:
    Li, B.
    Khlif-Bouassida, M.
    Toguéyni, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/330272.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    fault diagnosis
    discrete event system
    labeled Petri nets
    on-the-fly diagnosability analysis
    verifier nets
    diagnostyka błędu
    układ zdarzeń dyskretnych
    sieci Petriego
    Opis:
    This paper considers the problem of diagnosability analysis of discrete event systems modeled by labeled Petri nets (LPNs). We assume that the LPN can be bounded or unbounded with no deadlock after firing any fault transition. Our approach is novel and presents the on-the-fly diagnosability analysis using verifier nets. For a given LPN model, the verifier net and its reachability graph (for a bounded LPN) or coverability graph (for an unbounded LPN) are built on-the-fly and in parallel for diagnosability analysis. As soon as a diagnosability decision is established, the construction is stopped. This approach achieves a compromise between computation limitations due to efficiency and combinatorial explosion and it is useful to implement an engineering approach to the diagnosability analysis of complex systems.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 2; 269-281
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, structure and performance of calcium silicate ion exchangers from recycled container glass
    Autorzy:
    Coleman, N. J.
    Li, Q.
    Raza, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/109960.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    tobermorite
    sorbent
    hydrothermal synthesis
    cullet
    recycling
    ion exchange
    Opis:
    Numerous technical, economic and societal factors limit the recycling of waste soda-lime-silica glass back into the primary production process and accordingly alternative applications for this material are sought. This study demonstrates that waste soda-lime-silica container glass is a suitable feedstock material for the production of tobermorite, a calcium silicate cation exchanger. Tobermorites were synthesised at 100 °C from stoichiometric mixtures of container glass and lime under alkaline hydrothermal conditions. Increasing concentrations of sodium hydroxide (between 1.0 M and 4.0 M) in the reaction mixture promoted the formation and crystallisation of tobermorite, and also resulted in greater fragmentation of the silicate chains along the b-axis direction. The maximum removal capacities of these tobermorite specimens for Cd2+ (441 mg g-1) and Zn2+ (122 mg g-1) compared well with those of other waste-derived sorbents. Superior Cd2+- and Zn2+-uptake capacities and kinetics were observed for the least crystalline tobermorite specimen, indicating that stacking defects facilitate the transport and exchange of cations within the lattice.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 1; 5-16
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Modified Penetration Model for Copper-Tungsten Shaped Charge Jets with Non-uniform Density Distribution
    Autorzy:
    Elshenawy, T.
    Elbeih, A.
    Li, Q. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/358894.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    shaped charge
    jet penetration
    virtual origin
    non-uniform density distribution
    Opis:
    The penetration of a shaped charge jet with non-uniform density distribution was studied. The virtual origin model, which assumes a constant jet density, was modified to include the situation where the jet density deficit/reduction of an un-sintered copper-tungsten powder jet causes a non-uniform jet density distribution. A relation between the relative density ratio and the normalised jet velocity is proposed, based on which an analytical solution of the modified virtual origin model is obtained. The validity of the modified virtual origin model was demonstrated by its largely improved prediction in comparison with experimental and numerical results. It showed that the density reduction term reduces the penetration depth by 16.58% for an un-sintered copper-tungsten powder jet.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 4; 927-943
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Automatic graph cut based segmentation of retinal optic disc by incorporating blood vessel compensation
    Autorzy:
    Salazar-Gonzalez, A.
    Li, Y
    Liu, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/91826.pdf
    Data publikacji:
    2012
    Wydawca:
    Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
    Tematy:
    graph cut
    retinal optic disc
    glaucoma
    blindness
    retinal screening
    segmentation
    blood vessel
    graph cut technique
    DIARETDB1
    DRIVE
    Opis:
    Glaucoma is one of the main causes of blindness worldwide. Periodical retinal screening is highly recommended in order to detect any sign of the disease and apply the appropriated treatment. Different systems for the analysis of retinal images have been designed in order to assist this process. The segmentation of the optic disc is an important step in the development of a retinal screening system. In this paper we present an unsupervised method for the segmentation of the optic disc. The main obstruction in the optic disc segmentation process is the presence of blood vessels breaking the continuity of the object. While many other methods have addressed this problem trying to eliminate the vessels, we have incorporated the blood vessel information into our formulation. The blood vessels inside of the optic disc are used to give continuity to the object to segment. Our approach is based on the graph cut technique, where the graph is constructed by considering the relationship between neighbouring pixels and by the likelihood of them belonging to the foreground and background from prior information. Our method was tested on two public datasets, DIARETDB1 and DRIVE. The performance of our method was measured by calculating the overlapping ratio (Oratio), sensitivity and the mean absolute distance (MAD) with respect to the manually labeled images.
    Źródło:
    Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 3; 235-245
    2083-2567
    2449-6499
    Pojawia się w:
    Journal of Artificial Intelligence and Soft Computing Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulation of irregular waves in a numerical wave tank
    Autorzy:
    Li, Z-F.
    Shi, Y. Y.
    Ren, H. L.
    Li, H.
    Ashraf, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260392.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    open boundary condition
    multi transmitting formula
    irregular waves
    boundary element method
    numerical wave tank
    Opis:
    The time domain boundary element method was utilized to simulate the propagation of the irregular waves in a numerical wave tank. The problem was solved in a time-marching scheme, upon the irregular waves being fed through the inflow boundary, in which the theoretical solution was obtained from the wave energy spectrum. The open boundary condition was modeled by the multi transmitting formula (MTF), in which the phase velocity was calculated according to the Sommerfeld’s condition. The velocity potential and wave elevation were directly obtained by integrating the free surface condition twice, with respect to time. The accuracy of the developed numerical scheme was verified by simulating the propagation of irregular waves. The numerical results show good agreements with the analytical solutions, which prove that the proposed scheme is a promising way to the simulation of wave-body interactions.
    Źródło:
    Polish Maritime Research; 2015, S 1; 21-25
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and Simulation of Jacquard Warp-knitted Towel Fabric
    Projektowanie i symulacja żakardowej ręcznikowej dzianiny osnowowej
    Autorzy:
    Cong, H.
    Li, X.
    Zhang, A.
    Gao, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/231894.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    warp knitting
    towel
    jacquard
    model
    design
    simulation
    ręczna symulacja żakardowa
    struktura dzianiny
    projektowanie CAD
    Opis:
    This article proposes a method for designing and simulating jacquard warp-knitted towel fabric. Artistic conception drawing was used in realising the CAD design function of jacquard warp-knitted towel fabric based on the fabric structure and knitting principle. This study applied NURBS curves and the surface principle to build a three-dimensional solid model of the terry loop. Then using microscope type measurement instruments, the terry loop forms of the fabric surface were analysed and models of different forms of terry loop on the fabric surface built. With visual C++ for development tools combined with OpenGL graphics libraries, a CAD design and simulation function of jacquard warp-knitted towel fabric were finally realized within the CAD system.
    W artykule zaproponowano metodę projektowania i symulacji żakardowej ręcznikowej dzianiny osnowowej. Artystyczną koncepcję uwidocznioną na rysunku wykorzystano przy realizacji funkcji projektowania CAD w oparciu o strukturę dzianiny i zasady dziania. W analizie wykorzystano krzywe NURBS i charakterystykę powierzchni dla konstrukcji trójwymiarowych brył modelu pętli frotte. Następnie za pomocą pomiarów mikroskopowych analizowano pętle frotte utworzone na powierzchni dzianiny i stworzono modele różnych form tych pętli. Wykorzystując wizualizacje C++ w kombinacji z programem graficznym OpenGL zaprojektowano przy pomocy CAD wzory i symulacje funkcji żakardowej dzianiny osnowowej.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2014, 5 (107); 54-58
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of nano-silver coating on microbial control of microwave-freeze combined dried sea cucumber
    Autorzy:
    Li, X.
    Zhang, M.
    Duan, X.
    Mujumdar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/25122.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    nano-silver coating
    microbial control
    microwave-freeze drying
    sea cucumber
    echinoderm
    Stichopus japonicus
    Holothurioidea
    Źródło:
    International Agrophysics; 2011, 25, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergistic effect of a mixture of dodecylamine and kerosene on separation of magnetite ore
    Autorzy:
    Liu, A.
    Fan, M.-Q.
    Li, Z.-H.
    Powiązania:
    https://bibliotekanauki.pl/articles/109849.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    DDA-kerosene
    magnetite ore
    quartz
    flotation
    Opis:
    In this study, it was discovered that a mixture of dodecylamine (DDA)-kerosene demonstrated a stronger collecting ability for pure quartz and higher selectivity for magnetite ore. The relationship between the DDA-kerosene composition and mineral flotation performance on reverse flotation of magnetite ore was investigated. The results showed that floatability of the floating material increased when the DDA consumption increased. Specifically, during flotation, the fine particles (-0.074 mm fraction) selectively floated with DDA-kerosene. The difficult to float coarser particles (+0.074 mm fraction) with high content of quartz, required higher DDA dosage. However, higher DDA input during the flotation process did not necessarily yield better outcomes. The best results were obtained for 40/60 amine-to-oil ratio, as the quartz floated markedly with smaller magnetite loss and the flotation behavior was superior to pure DDA. Magnetite concentrates with 1.83% SiO2 and 71.04% Fe were produced using 120 g/Mg of DDA-kerosene (WDDA=40%).
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 2; 647-661
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In-situ coal seam and overburden permeability characterization combining downhole flow meter and temperature logs
    Autorzy:
    Busse, J.
    Scheuermann, A.
    Bringemeier, D.
    Hossack, A.
    Li, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1395710.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Śląski. Wydział Nauk o Ziemi
    Tematy:
    coal seam detection
    permeability
    geophysical logging
    exploration
    methodology
    przepuszczalność
    pokłady węgla
    metodyka
    poszukiwania
    Opis:
    The planning and design of any coal mine development requires among others a thorough investigation of the geological, geotechnical and hydrogeological subsurface conditions. As part of a coal mine exploration program we conducted heat pulse vertical flow meter testing. The flow data were combined with absolute and differential temperature logging data to gain information about the hydraulic characteristics of two different coal seams and their over- and interburden. For the strata that were localised based on geophysical logging data including density, gamma ray and resistivity hydraulic properties were quantified. We demonstrate that the temperature log response complements the flow meter log response. A coupling of both methods is therefore recommended to get an insight into the hydraulic conditions in a coal seam and its overburden.
    Źródło:
    Contemporary Trends in Geoscience; 2016, 5, 1; 1-17
    2299-8179
    Pojawia się w:
    Contemporary Trends in Geoscience
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved Roberts focusing evaluation method for an autofocusing system
    Autorzy:
    Yin, A.
    Dai, Z.
    Chen, B.
    Li, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/173381.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    focus evaluation function
    evaluation window
    autofocusing
    Opis:
    In this paper, a new focusing evaluation method based on local 2/8 center windows is proposed for an autofocusing system. We have proposed an evaluation function which improved the Roberts function with eight-neighborhood or four-neighborhood. The approximate optimal criteria window is selected by a 2/8 rule. Comparative experiments implemented with other methods have shown that the 2/8 rule method not only can find the approximate optimal evaluation window quickly, but also has better generality. This evaluation function of improved Roberts’ function has higher sensitivity and better real-time performance.
    Źródło:
    Optica Applicata; 2013, 43, 3; 529-538
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interpolation-based reconstruction methods for tomographic imaging in 3D positron emission tomography
    Autorzy:
    Li, Y.
    Kummert, A.
    Boschen, F.
    Herzog, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/908045.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    rekonstrukcja tomograficzna
    interpolacja dwuwymiarowa
    twierdzenie o przekroju Fouriera
    szereg rozdzielczy
    tomographic reconstruction
    three-dimensional positron emission tomography
    Fourier slice theorem
    frequency sample distribution
    two-dimensional interpolation
    inverse distance weighting
    gridding method
    Opis:
    Positron Emission Tomography (PET) is considered a key diagnostic tool in neuroscience, by means of which valuable insight into the metabolism function in vivo may be gained. Due to the underlying physical nature of PET, 3D imaging techniques in terms of a 3D measuring mode are intrinsically demanded to assure satisfying resolutions of the reconstructed images. However, incorporating additional cross-plane measurements, which are specific for the 3D measuring mode, usually imposes an excessive amount of projection data and significantly complicates the reconstruction procedure. For this reason, interpolation-based reconstruction methods deserve a thorough investigation, whose crucial parts are the interpolating processes in the 3D frequency domain. The benefit of such approaches is apparently short reconstruction duration, which can, however, only be achieved at the expense of accepting the inaccuracies associated with the interpolating process. In the present paper, two distinct approaches to the realization of the interpolating procedure are proposed and analyzed. The first one refers to a direct approach based on linear averaging (inverse distance weighting), and the second one refers to an indirect approach based on two-dimensional convolution (gridding method). In particular, attention is paid to two aspects of the gridding method. The first aspect is the choice of the two-dimensional convolution function applied, and the second one is the correct discretization of the underlying continuous convolution. In this respect, the geometrical structure named the Voronoi diagram and its computational construction are considered. At the end, results of performed simulation studies are presented and discussed.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2008, 18, 1; 63-73
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In Situ Measurements of Atmospheric CO And Its Correlation With Nox And O3 at a Rural Mountain Site
    Autorzy:
    Li, J.
    Reiffs, A.
    Parchatka, U.
    Fischer, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/221507.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    trace gas measurements
    atmospheric CO
    QCL sensor
    sources relation
    sources identification
    Opis:
    Ambient concentrations of CO, as well as NOx and O3, were measured as a part of the PARADE campaign conducted at the Taunus Observatory on the summit of the Kleiner Feldberg between the 8th of August and 9th of September 2011. These measurements were made in an effort to provide insight into the characteristics of the effects of both biogenic and anthropogenic emissions on atmospheric chemistry in the rural south-western German environment. The overall average CO concentration was found to be 100.3±18.1 ppbv (within the range of 71 to 180 ppbv), determined from 10-min averages during the summer season. The background CO concentration was estimated to be ~90 ppbv. CO and NOx showed bimodal diurnal variations with peaks in the late morning (10:00-12:00 UTC) and in the late afternoon (17:00-20:00 UTC). Strong correlations between CO and NOx indicated that vehicular emission was the major contributor to the notable CO plumes observed at the sampling site. Both local meteorology and backward trajectory analyses suggest that CO plumes were associated with anthropogenically polluted air masses transferred by an advection to the site from densely populated city sites. Furthermore, a good linear correlation of R2 = 0.54 between CO and O3 (∆O3/∆CO=0.560±0.016 ppbv/ppbv) was observed, in good agreement with previous observations.
    Źródło:
    Metrology and Measurement Systems; 2015, 22, 1; 25-38
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ metody suszenia i temperatury procesu na właściwości higroskopijne suszu jabłkowego
    Influence of the method of drying and process temperature on hygroscopic properties of dried apples
    Autorzy:
    Witrowa-Rajchert, D.
    Fabisiak, A.
    Stawczyk, J.
    Li, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/287906.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    suszenie konwekcyjne
    suszenie sublimacyjne
    suszenie niskotemperaturowe
    właściwości sorpcyjne
    susz jabłkowy
    convection drying
    sublimation drying
    low-temperature drying
    sorptive properties
    Opis:
    Celem badań była analiza właściwości sorpcyjnych jabłek suszonych sublimacyjnie, konwekcyjnie i niskotemperaturowo pod ciśnieniem atmosferycznym. Na właściwości sorpcyjne suszu jabłkowego miała wpływ metoda suszenia. Wyższa temperatura płyty grzejnej w czasie suszenia sublimacyjnego spowodowała wzrost ilości wchłanianej przez materiał pary wodnej. Dla suszu konwekcyjnego nie stwierdzono istotnego wpływu temperatury powietrza na kinetykę adsorpcji pary wodnej. Przebieg kinetyk adsorpcji pary wodnej dla suszy niskotemperaturowych wykazał, że prowadzenie całego procesu w temperaturach ujemnych wpływa na mniejszą zdolność adsorpcji. Zwiększenie temperatury powietrza w drugiej części procesu powodowało znaczne zwiększenie ilości wchłanianej przez susz pary wodnej.
    The aim of the study is an analysis of sorptive properties of apples dried by sublimation, convection and in low temperature under atmospheric pressure. The drying method influences sorptive properties of dried apples. Higher temperature of the heating plate during sublimation drying caused an increased of vapour absorbed by material. Air temperature did not have an important influence on kinetics of vapour absorption for convection dried apples. The kinetics of vapour absorption for low-temperature dried apples proved that when the process takes place in negative temperatures the ability to absorb is lower. An increase of air temperature in the second part of the process caused a considerable increase of the amount of vapour absorbed by dried apples.
    Źródło:
    Inżynieria Rolnicza; 2006, R. 10, nr 7(82), 7(82); 457-463
    1429-7264
    Pojawia się w:
    Inżynieria Rolnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New nondestructive method based on spatial-temporal speckle correlation technique for evaluation of apples quality during shelf-life
    Autorzy:
    Zdunek, A.
    Muravsky, L.I.
    Frankevych, L.
    Konstankiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/24712.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2007, 21, 3; 305-310
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surfactant assisted removal of engine oil from synthetic soil
    Autorzy:
    Ramamurthy, A. S.
    Chen, Z.
    Li, X.
    Azmal, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/207953.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sodium dodecyl sulfate
    SDS
    desorption
    polyethylene oxides
    sodium
    sodium sulfate
    soils
    surface active agents
    dodecylosiarczan sodu
    surfaktanty anionowe
    desorpcja
    tlenki polietylenu
    sód
    siarczan sodowy
    gleba
    środki powierzchniowo czynne
    detergenty
    Opis:
    Effectiveness of surfactants SDS (sodium dodecyl sulfate), AOT (sodium dioctyl sulfosuccinate) and Brij 35 (polyoxyethylene lauryl ether) in removing residual oil from soils have been determined. Experimental results indicated that oil desorption efficiencies with surfactants are 7 to 18 times higher than using water alone. 0.6% Brij 35 at was the most effective surfactant to remove oil from soil, and it did not display any significant change in oil desorption with pH changes. A comparison study also showed that pore volume was a more significant parameter than soil washing flow rate to improve oil desorption.
    Źródło:
    Environment Protection Engineering; 2015, 41, 2; 67-79
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model of eco-water driving force affecting the evolvement of runoff in the upper Minjiang River Basin
    Autorzy:
    Jin, H.
    Yang, W.
    Li, P.
    Ashraf, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259476.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    eco-water
    remote sensing quantitative retrieval
    upper Minjiang River
    runoff prediction
    Opis:
    The amount of eco-water resources reflects the land surface water conservation capability, and the underlying surface condition in the hydrologic cycle. In the upper Minjiang River Basin, the amounts of eco-water resources were retrieved from remotely sensed data during 1992 to 2005. Through regression analysis between the retrieved eco-water data and the climate hydrological data mainly including the temperature, the precipitation, and the runoff in the same period, the model of eco-water driving force affecting the evolvement of runoff was established. The accuracy analysis indicates that the model can well describe the relationship between dry season runoff and its driven factors, the measured data validation proves that the model has high precision and good practicability. The eco-water remote sensing inversion provides a valid method to quantify the land surface water conservation capability, and suggests an interesting approach for the driving function quantitative researches of underlying surface factor in the hydrologic cycle.
    Źródło:
    Polish Maritime Research; 2016, S 1; 91-96
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of operating pressure and stand-off distance on coal comminution by waterjet
    Autorzy:
    Li, Y.
    Galecki, G.
    Şen, G. A.
    Şen, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/110840.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    coal
    waterjet
    comminution
    particle size distribution
    Opis:
    Comminution of coal to ultrafine sizes by high-pressure waterjet coupled with cavitation cell provides a novel method for preparation of coal-water fuels for next generation, near-zero emission electric power generation. To establish the fundamental performance of the waterjet mill, the effects of the operating pressure and stand-off distance were comprehensively investigated using a high ash bituminous coal. The comminution products were evaluated in terms of the particle size, particle size distribution, and surface area change. The experimental results indicated that the waterjet-mediated comminution of coal was strongly affected by all these operating parameters. Higher operating pressure led to finer products, while the efficiency of the waterjet mill in terms of particle size strongly depended on the stand-off distance. This research provides a deeper insight into the high-pressure waterjet for coal comminution and a basis for process parameter optimization.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 394-401
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction between turbidity currents and a contour current – a rare example from the Ordovician of Shaanxi province, China
    Autorzy:
    Li, Hua
    van Loon, A. J. (Tom)
    He, Youbin
    Powiązania:
    https://bibliotekanauki.pl/articles/950462.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    contourites
    turbidites
    reworking
    Ordos basin
    Pingliang formation
    kontury
    turbidyty
    przeróbka
    zlewnia
    Ordos
    Pingliang
    Opis:
    The silty top parts of graded turbidites of the Late Ordovician Pingliang Formation, which accumulated along the southern margin of the Ordos Basin (central China), have been reworked by contour currents. The reworking of the turbidites can be proven on the basis of paleocurrent directions in individual layers: the ripple-cross-bedded sandy divisions of some turbidites show transport directions consistently into the downslope direction (consistent with the direction of other gravity flows), but in the upper, silty fine-grained division they show another direction, viz. alongslope (consistent with the direction that a contour current must have taken at the same time). Both directions are roughly perpendicular to each other. Moreover, the sediment of the reworked turbidites is better sorted and has better rounded grains than the non-reworked turbidites. Although such type of reworking is well known from modern deep-sea environments, this has rarely been found before in ancient deep-sea deposits. The reworking could take place because the upper divisions of the turbidites involved are silty and consequently relatively easily erodible, while the contour current had locally a relatively high velocity – and consequently a relatively large erosional capability – because of confinement within a relatively narrow trough.
    Źródło:
    Geologos; 2019, 25, 1; 15-30
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PP2A controls methionine metabolism elicited by intracellular H2O2
    Autorzy:
    Trotta, A.
    Li, S.
    Mhamdi, A.
    Ravanel, S.
    Noctor, G.
    Kangasjarvi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/80912.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    intracellular signalling
    plant cell
    reactive oxygen species
    protein
    post-translational modification
    phosphorylation
    methionine
    hydrogen peroxide
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pseudogap-Like Phenomena in Cuprates as a Manifestation of Charge-Density Waves
    Autorzy:
    Ekino, T.
    Gabovich, A.
    Voitenko, A.
    Suan Li, Mai
    Szymczak, H.
    Pękała, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812272.pdf
    Data publikacji:
    2008-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.43.Jn
    71.45.Lr
    74.50.+r
    74.81.-g
    Opis:
    Differential conductance G as a function of the bias voltage V was measured for break-junctions of superconducting $Bi_2Sr_2CaCu_2O_{8+δ}$ and $YBa_2Cu_3O_{7-δ}$. The dependences G(V) for both materials clearly demonstrate the so-called dip-hump structures outside the gap region. A theory, which suggests the charge-density-wave origin of the dip-hump structures and explains its specific form by intrinsic inhomogeneity of cuprate materials, was developed. The well-known pseudogap features in the tunnel spectra of high-$T_c$ oxides found both below and above the superconducting critical temperature are also described by the theory, which testifies that both the pseudogap and the dip-hump structures have the same origin. Competing theories and various G(V) peculiarities found for a number of superconducting oxides are briefly discussed.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 1; 59-66
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Active fault tolerance control of a wind turbine system using an unknown input observer with an actuator fault
    Autorzy:
    Li, S.
    Wang, H.
    Aitouche, A.
    Tian, Y.
    Christov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/329822.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wind turbine system
    linear parameter varying system
    fault tolerant control
    unknown input observer
    elektrownia wiatrowa
    sterowanie tolerujące uszkodzenia
    obserwator wejściowy
    Opis:
    This paper proposes a fault tolerant control scheme based on an unknown input observer for a wind turbine system subject to an actuator fault and disturbance. Firstly, an unknown input observer for state estimation and fault detection using a linear parameter varying model is developed. By solving linear matrix inequalities (LMIs) and linear matrix equalities (LMEs), the gains of the unknown input observer are obtained. The convergence of the unknown input observer is also analysed with Lyapunov theory. Secondly, using fault estimation, an active fault tolerant controller is applied to a wind turbine system. Finally, a simulation of a wind turbine benchmark with an actuator fault is tested for the proposed method. The simulation results indicate that the proposed FTC scheme is efficient.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 69-81
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Indicated mean effective pressure oscillations in a natural gas combustion engine by recurrence plots
    Analiza wykresów rekurencyjnych dla średniego efektywnego ciśnienia indykowanego w silniku spalinowym zasilanym gazem naturalnym
    Autorzy:
    Litak, G.
    Syta, A.
    Yao, B. -F.
    Li, G.-X
    Powiązania:
    https://bibliotekanauki.pl/articles/280206.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
    Tematy:
    engine
    combustion
    recurrence plot
    nonlinear oscillations
    Opis:
    We investigate the nonlinear time series of Indicated Mean Effective Pressure (IMEP) of the spark ignition engine cyclic combustion process of a natural gas. By applying the embedding theorem and the recurrence plots technique, we show changes in the engine dynamics for different equivalence ratios. Especially, we provide arguments for intermittency behaviour.
    Zbadano nieliniowe przebiegi czasowe Średniego Ciśnienia Indykowanego cyklicznego procesu spalania w silniku spalinowym zasilanym gazem naturalnym. Stosując twierdzenie o zanurzeniu oraz technikę wykresów rekurencyjnych, pokazano istotne różnice w dynamice silnika przy zmianie składu mieszanki paliwa wyrażonej wartością współczynnika równowagowego. W szczególności podano argumenty przemawiające za występowaniem zjawiska intermitencji.
    Źródło:
    Journal of Theoretical and Applied Mechanics; 2009, 47, 1; 55-67
    1429-2955
    Pojawia się w:
    Journal of Theoretical and Applied Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental and mathematical investigations on unconfined compressive behaviour of costal soft soil under complicated freezing processes
    Autorzy:
    Wang, W.
    Li, N.
    Zhang, F.
    Zhou, A.
    Chi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/259246.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    costal soft soil
    stress-strain curve model
    unconfined compressive behavior
    freezing-thawing circle
    Opis:
    In order to properly understand the effect of freezing-thawing circle (FTC) to mechanical behavior of costal soft soil (CSS), unconfined compressive test is conducted. Six kind FTC times are designed from zero to five. The tested data show that: (1) unconfined compressive strength of CCS decreases nonlinearly with more FTC, and the strength after five FTC times becomes about 22% of its original strength without any freezing-thawing experience; (2) stressstrain curves of all unconfined compressive samples can be well fitted by three-parameter hyperbolic model; (3) and relationship between two parameters and FTC times can be fitted by exponent function, while another parameter can be considered as 0.95. Consequently, one composite hyperbolic- exponent empirical formula is established in order to describe freezing-thawing-dependent stress-strain behavior of CSS. Finally, good agreements have been found between tested dada and simulated results.
    Źródło:
    Polish Maritime Research; 2016, 4; 112-116
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction of rubidium and cesium from brine solutions using a room temperature ionic liquid system containing 18-crown-6
    Autorzy:
    Huang, D.
    Zheng, H.
    Liu, Z.
    Bao, A.
    Li, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/779994.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Rubidium
    Cesium
    Ionic liquid
    18-crown-6
    Solvent extraction
    Opis:
    Application of 1-butyl-3-metyhlimidazaolium hexafl uorophosphate ([C4mim][PF6 ]), in the extraction of rubidium and cesium from brine solutions using 1,4,7,10,13,16-hexaoxacyclooctadecane (18C6) as extractant was investigated. Parameters that affect the extraction including pH of aqueous phase, equilibration time, dosage of the ionic liquid, phase ratio, concentration of 18C6 were studied. Under the optimal conditions, the single extraction effi ciency of rubidium ions and cesium ions were up 84.11% and 94.99%, respectively. The stripping of alkali metal ions from the loaded organic phase with different stripping agents and concentrations were also investigated. The initial value of the K/Cs and K/Rb ratios were 93.0 and 104.3, respectively, which have dropped 91.21% and 88.01%, respectively, after the extraction and stripping experiments. It was taken a big step in the separation and enrichment of cesium (rubidium) ion and potassium ion. The extraction mechanism was revealed most likely to be a cation exchange mode in this system.
    Źródło:
    Polish Journal of Chemical Technology; 2018, 20, 2; 40-46
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simplified analyses of stress induced anisotropy in remolded soft clay under undrained conditions
    Autorzy:
    Lin, P.
    Li, Z.-x.
    Garg, A.
    Yadav, J. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818489.pdf
    Data publikacji:
    2020
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    stress induced anisotropy
    Shantou soft clay
    true triaxial experiment
    anizotropia wywołana naprężeniem
    miękka glinka Shantou
    prawdziwy eksperyment trójosiowy
    Opis:
    Purpose: The soil’s anisotropy induced by stress (i.e. stress induced anisotropy) has an important effect on the behavior of soil. This paper focuses on analyzing the anisotropy of remolded Shantou soft clay under compression stress path. Design/methodology/approach: Experiments were executed by using three axle experimental instruments. The data obtained from the plain strain tests were analyzed and the relationship between stress and strain was calculated by using the modified Duncan- Chang and Lade-Duncan models. The models were modified under the condition of plain strain and cohesion. Findings: It was concluded that in complex stress path conditions, the conventional triaxial tests may not fully reflect the actual stress of soil and its response in the Duncan-Chang and Lade-Duncan models. Research limitations/implications: The formulation of Mohr-Coulomb failure criterion in the plasticity framework is quite diffcult. As a result, dilatancy cannot be described. The properties of soil in unload or drained conditions remain to be part of further investigated. Practical implications: Based upon the two stiffness parameters, the modified Duncan- Chang model has captured the soil behaviour in a very conformable way and is recommened for practical modeling. These constitutive models of soil are widely used in the numerical analyses of soil structure such as embankments. Originality/value: Duncan-Chang and Lade-Duncan models widely used in engineering practices are modes based on conventional triaxial cases. Both models have have some inherent limitations to represent the stress-strain characteristics of soils, such as shear-induced dilatancy and stress path dependency and required corrections. In this investigation, the tests are carried out in undrained conditions. It is related to the properties of soil in load conditions.
    Źródło:
    Archives of Materials Science and Engineering; 2020, 105, 2; 56--64
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modular design and assembly of automotive and architectural structures - product integration through adhesive bonding
    Projektowanie i montaż systemów modułowych w przemyśle samochodowym i budownictwie - połączenie elementów wyrobów metodą klejenia
    Autorzy:
    Kuys, B.
    Gutowski, M.
    Li, S.
    Gutowski, V. S.
    Cerra, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/175851.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modularisation systems
    automotive
    building industry
    adhesive bonding
    systemy modułowe
    motoryzacja
    budownictwo
    połączenia klejone
    Opis:
    This paper analyses advances in design and manufacturing methodology based on system modularisation in the automotive and building & construction industries and offers novel, fully validated technology for modules assembly by adhesive bonding. It is shown, how application of appropriate modularisation methodology through sub-division of the entire system into principal system platform and independent functional or stylistic modules enables identification of components common to an entire family of product, and those which facilitate product re-configuration and stylings. The latter category of subcomponents are easily integrated into the final structure by mounting onto the principal system platform through interfaces facilitating rapid assembly and/or disassembly of the product. Through adoption of modularisation, the pivotal structure elements such as automotive framing systems or high-rise building’s curtain wall framing and cladding can be quickly and cost effectively designed, re-designed when needed (for instance for re-styling or refurbishing) and cost-effectively reconfigured through assembly of a variety of designated sub-systems onto the principal system platform. Another aspect of this paper discusses and validates a feasible technology facilitating for surface modification of typical engineering substrate materials (plastics, composites, metals and ceramics) for rapid assembly of structures through adhesive bonding of decorative and/or functional cladding and vision panels to curtain wall structures of high-rise commercial or residential buildings. An identical approach to applications in rapid assembly of automotive modular systems will be presented in the forthcoming paper.
    W pracy zawarto analizę postępu w metodach projektowania i produkcji opartych na zasadzie systemów modułowych w motoryzacji oraz budownictwie, również technologię montażu za pomocą połączeń klejonych. Przedstawiono, w jaki sposób przyjęcie odpowiednich modułów poprzez podział całego systemu wpływa na podstawową platformę montażową oraz autonomiczne moduły funkcjonalne i stylistyczne. Umożliwiona jest wówczas identyfikacja elementów wspólnych dla całej rodziny produktów, także pozwalających na przekształcenie lub stylizację wyrobu. Moduły autonomiczne są łatwo integrowalne w produkty finalne poprzez montaż na podstawowej platformie montażowej przez zastosowanie połączeń standardowych – umożliwiają szybki montaż i/lub demontaż. Wykorzystanie modułowych, kluczowych elementów konstrukcji, jak rama zawieszenia samochodu lub ściana osłonowa wysokościowca i płyty ościenne pozwala na przekształcanie, szybkie i tanie projektowanie, również przeprojektowywanie (np. dla nowej stylizacji lub odnowienia budynku), oraz przekształcanie poprzez montaż różnych nowo projektowanych podsystemów na głównej platformie montażowej systemu. Odrębny fragment pracy omawia łatwą do wprowadzenia technologię modyfikacji powierzchni typowych materiałów inżynierskich (polimery, kompozyty, metale i ceramika) dla szybkiego montażu konstrukcji poprzez klejenie ozdobnych lub funkcjonalnych paneli ościennych lub szkła do ram ścian osłonowych wysokich budynków mieszkalnych i komercyjnych. Identyczne podejście w zastosowaniu do szybkiego montażu samochodowych systemów modułowych będzie przedstawione w kolejnym artykule.
    Źródło:
    Advances in Manufacturing Science and Technology; 2016, 40, 3; 5-28
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solvent-free synthesis of 1-amidoalkyl-2-naphthol and 3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile derivatives by Fe3O4@enamine-B(OSO3H)2 as an efficient and novel heterogeneous magnetic nanostructure catalyst
    Autorzy:
    Li, Fangping
    Zhang, Jun
    Wang, Longjiang
    Liu, Weijian
    Yousif, Qahtan A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778863.pdf
    Data publikacji:
    2020
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    1-amidoalkyl-2-naphthol
    3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile
    solvent-free conditions
    magnetic
    catalyst
    Opis:
    A green procedure for the one-pot three-component synthesis of 1-amidoalkyl-2-naphthol and 3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile derivatives from the reaction of 2-naphtol, aldehydes, and malononitrile/acetamide in the presence of a catalytic amount of Fe3O4@enamine-B(OSO3H)2 as an efficient and novel heterogeneous magnetic nanostructure catalyst is described. The catalyst was characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). These strategies possess some merits such as simple work-up method, easy preparation of the catalyst, short reaction times, good-to-high yields, and non-use of hazardous solvents during all steps of the reactions. Moreover, due to the magnetic nature of the catalyst, it was readily recovered by magnetic decantation and can be recycled at least six runs with no considerable decrease in catalytic activity.
    Źródło:
    Polish Journal of Chemical Technology; 2020, 22, 2; 9-19
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge-Density-Wave Origin of Dip-Hump Structures in the Tunnel Spectra of Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8+δ}$
    Autorzy:
    Ekino, T.
    Gabovich, A. M.
    Li, M. S.
    Pękała, M.
    Szymczak, H.
    Voitenko, A. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047318.pdf
    Data publikacji:
    2007-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.43.Jn
    71.45.Lr
    74.50.+r
    74.81.-g
    Opis:
    We calculated the differential conductance G as the function of the bias voltage V across the tunnel junction between a normal metal or a conventional superconductor and an inhomogeneous superconductor with charge density waves. Spatial averaging over random domains with varying superconducting and normal state properties was carried out. For high-T$\text{}_{c}$ oxides, irregularly distorted charge density wave patterns with spatially scattered values of various parameters were earlier shown to manifest themselves in a great body of experimental data. The results of calculation were applied to explain the well-known dip-hump structure in the G(V) dependence for Bi$\text{}_{2}$Sr$\text{}_{2}$CaCu$\text{}_{2}$O$\text{}_{8+δ}$ and other cuprates.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 4; 573-580
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Easy Vortex Motion in an Artificial Channel of $YBa_2Cu_3O_{7-δ}$ Superconducting Films
    Autorzy:
    Jukna, A.
    Barboy, I.
    Jung, G.
    Abrutis, A.
    Li, X.
    Wang, D.
    Sobolewski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813381.pdf
    Data publikacji:
    2008-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Sv
    74.25.Qt
    74.78.Bz
    Opis:
    Quasi-Josephson effect produced by a coherent vortex motion in the horizontal part of the laser-performedΠ-shaped channel of a $YBa_2Cu_3O_{7-δ}$ superconducting bridge was investigated by means of electric transport measurements. We observed that in our structures, in a limited range of temperatures and bias currents, the vortices were confined in the channel only and moved coherently with the velocity of $3×10^4$ m/s. The corresponding current-voltage characteristics of the bridge exhibited Josephson-like voltage steps with the amplitude dependent on temperature, but independent of the bias current.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 3; 959-962
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Rib Structure and Elastic Yarn Type Variations on Textile Piezoresistive Strain Sensor Characteristics
    Wpływ struktury dzianiny i rodzaju przędzy elastycznej na charakterystykę piezorezystywnego czujnika tekstylnego
    Autorzy:
    Raji, R. K.
    Miao, X.
    Zhang, S.
    Li, Y.
    Wan, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/233476.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    strain sensor
    sensitivity
    piezoresistance
    elastic yarn
    weft knitting
    czujnik odkształcenia
    czułość
    odporność na piezorezystancję
    elastyczna przędza
    dzianie wątku
    Opis:
    Production parameters have been established to play a fundamental role in dictating the physical characteristics and sensing properties of knitted sensors. This research studied the influence of elastic yarn type and rib fabric structure variation on the physical, tensile and conductive properties and sensitivity performance of knitted underwear strain sensors to be used for breathing mensuration. Four different structures in 1×1, 1×2, 1×3 and 2×2 mock ribs were knitted using covered elastic (CY) and bare strand elastic yarn (BS) combinations. These two parameters proffered unique physical, conductive and tensile characteristics to the samples. Wear and machine tests were conducted to ascertain the sensor’s piezoresistive responses. The machine test showed a higher piezoresistive response, with an average peak value (APV) from 1.70 Ω to 0.24 Ω, while those for the wear test recorded were around 0.0110 Ω to 1.867 Ω for all sample categories. However, sensors knitted with covered elastic yarns produced the best breathing test results (APV of 1.089 Ω – 1.86 Ω) compared to bare strand elastic yarns (APV 0.0027 Ω – 0.0790 Ω) when used in a wearable environment. Fabric structure variation had influences on both conductive and tensile characteristics; however, the effects on the piezoresistive response were negligible. The influences of the unique characteristics provided by these core parameters on sensor resistance values, piezoresistance, aging, ease of deformation and dimensional stability have also been discussed.
    W pracy badano wpływ struktury dzianiny i rodzaju przędzy na właściwości fizyczne, rozciągające i przewodzące oraz czułość dzianinowych czujników umieszczonych w wyrobach bieliźnianych. Czujniki mają znaleźć zastosowanie w pomiarach napięcia oddechowego. Badaniom poddano cztery różne dzianiny: 1 × 1, 1 × 2, 1 × 3 i 2 × 2, w procesie dziania wykorzystano kombinacje przędz elastycznych powlekanych (CY) i niepowlekanych (BS). Dało to unikalne właściwości fizyczne, przewodzące i rozciągające próbki. W celu ustalenia reakcji piezorezystywnych czujnika przeprowadzono dwa rodzaje testów. Test maszynowy wykazał wyższą reakcję piezorezystywną, ze średnią wartością szczytową (APV) od 1,70 Ω do 0,24 Ω, podczas gdy dla testu zużycia zarejestrowano około 0,0110 Ω do 1,867 Ω dla wszystkich kategorii próbek. Jednakże, czujniki dzianinowe z powleczonymi przędzami elastycznymi dały najlepsze wyniki testu oddychania (APV o wartości 1.089 Ω – 1.86 Ω) w porównaniu do niepowleczonych przędz elastycznych (APV 0,0027 Ω – 0,0790 Ω), podczas stosowania ich w środowisku noszenia. Zmiana struktury dzianiny miała wpływ na właściwości przewodzące i rozciągające, jednak wpływ na reakcję piezorezystywną był znikomy. Omówiono również wpływ unikalnych cech tych podstawowych parametrów na wartości rezystancji czujnika, odporność na piezorezystencję, starzenie, łatwość deformacji i stabilność wymiarową.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 5 (131); 24-31
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water-exit process modeling and added-mass calculation of the submarine-launched missile
    Autorzy:
    Yang, J.
    Feng, J.
    Li, Y.
    Liu, A.
    Hu, J.
    Ma, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/260251.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    submarine-launched missile
    fluid-structure interaction
    water-exit dynamic model
    time-varying added-mass
    numerical simulation
    Opis:
    In the process that the submarine-launched missile exits the water, there is the complex fluid solid coupling phenomenon. Therefore, it is difficult to establish the accurate water-exit dynamic model. In the paper, according to the characteristics of the water-exit motion, based on the traditional method of added mass, considering the added mass changing rate, the water-exit dynamic model is established. And with help of the CFX fluid simulation software, a new calculation method of the added mass that is suit for submarine-launched missile is proposed, which can effectively solve the problem of fluid solid coupling in modeling process. Then by the new calculation method, the change law of the added mass in water-exit process of the missile is obtained. In simulated analysis, for the water-exit process of the missile, by comparing the results of the numerical simulation and the calculation of theoretical model, the effectiveness of the new added mass calculation method and the accuracy of the water-exit dynamic model that considers the added mass changing rate are verified.
    Źródło:
    Polish Maritime Research; 2017, S 3; 152-164
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Graphics Processing Unit for In-Line Electron Holography
    Autorzy:
    Morawiec, K.
    Dłużewski, P.
    Kret, S.
    Szczepańska, A.
    Li, T.
    Sloan, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033020.pdf
    Data publikacji:
    2017-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Lp
    68.37.Og
    68.55.Nq
    42.30.Rx
    61.05.jp
    07.05.Pj
    42.30.-d
    42.30.Wb
    Opis:
    In the present work, software for exit electron wave reconstruction based on the iterative approach was implemented and a new method for drift-correction of the focal series was proposed.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 5; 1353-1356
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PP2A phosphatase interacts with CPK kinase and regulates pathogenesis responses triggered by intracellular ROS signals
    Autorzy:
    Kangasjarvi, S.
    Denessiouk, K.
    Trotta, A.
    Konert, G.
    Rahikainen, M.
    Li, S.
    Mhamdi, A.
    Noctor, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/80995.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    protein phosphatase 2A
    calcium-dependent protein kinase
    reactive oxygen species
    organelle
    protein kinase
    plant immunity
    Arabidopsis
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin-Dependent Tunneling in a Magnetic Field for Junctions Involving Normal and Superconducting CDW Metals
    Autorzy:
    Ekino, T.
    Gabovich, A. M.
    Suan Li, Mai
    Pękała, M.
    Szymczak, H.
    Voitenko, A. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046730.pdf
    Data publikacji:
    2006-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.45.Lr
    74.50.+r
    85.75.-d
    Opis:
    The voltage, V, dependences of the differential tunnel conductance G(V) were calculated for two kinds of junctions involving normal and superconducting charge-density-wave metals (CDWMs) in the external magnetic field H. The first is a non-symmetrical junction with a CDWM electrode being biased with respect to a ferromagnet. Calculations show that the paramagnetic splitting occurs between spin-up and spin-down components of G(V), similar to what is observed when a superconducting electrode is used instead of the CDWM one. The second setup is symmetric (CDWM-I-CDWM), where I denotes an insulator. If at least one of the CDWM electrodes is normal and H≠0, G(V) will also be spin-split.
    Źródło:
    Acta Physica Polonica A; 2006, 109, 4-5; 477-484
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stability control of propeller Autonomous Underwater Vehicle based on combined sections method
    Autorzy:
    Qi, D.
    Feng, J.
    Liu, A.
    Hu, J.
    Xu, H.
    Li, Y.
    Ashraf, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/259119.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    propeller AUV
    dynamic model
    stability control
    simulation
    Opis:
    Learning from the motion principle of quadrotor, a symmetric propeller AUV, which has small size and low velocity is designed. Compared with the AUV equipped with rudders, it has better maneuverability and manipulation at low velocity. According to the Newton-Euler method, the 6 DOF kinematic model and dynamic model of the propeller AUV are established. A stability controller that consists of 3 different PID controllers is designed. It makes the depth and attitude angle as trigger conditions, and the relevant controller is chosen in different moving process. The simulation experiments simulate ideal motion state and disturbed motion state, and experiments results show that the stability controller based on combined sections method can make the best of mature technology of PID, and meet the control requirements in different stages. It has a higher respond speed and accuracy, improving the stability of the propeller AUV under the disturbance of complex ocean currents.
    Źródło:
    Polish Maritime Research; 2015, S 1; 157-162
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An enigmatic, possibly chemosymbiotic, hexactinellid sponge from the early Cambrian of South China
    Autorzy:
    Botting, J.P.
    Muir, L.A.
    Li, X.-F.
    Lin, J.-P.
    Powiązania:
    https://bibliotekanauki.pl/articles/19994.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Porifera
    Hexactinellida
    symbiosis
    chemosynthesis
    Early Cambrian
    South China
    Cambrian
    China
    Opis:
    Six specimens of a strongly curved, cylindrical hexactinellid sponge have been recovered from the Tommotian– Atdabanian Hetang Biota of South China, and are described as Decumbispongia yuani gen. et sp. nov. The robust, thick−walled sponge shows no evidence of an osculum or basal structures, and the body form is inconsistent with an upright, filter−feeding life position. Interpretations as a detritivore feeding by amoeboid extensions, or as a facultative chemosynthetic symbiosis of sponge and bacteria are considered. The latter interpretation is preferred due to the highly constrained body shape, and the body form is interpreted from this perspective. The species indicates that Cambrian sponges occupied at least some autecological niches that appear to have been vacant since that time.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic analyses of cytosolic NADPH-regenerating systems reveal specific functions in oxidative stress responses
    Autorzy:
    Mhamdi, A.
    Li, S.
    Van Der Kelen, K.
    Van Breusegem, F.
    Noctor, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/81109.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    genetic analysis
    nicotinamide adenine dinucleotide phosphate
    dehydrogenase
    oxidative stress
    gene expression
    salicylic acid
    hydrogen peroxide
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single and multidrug filomicelles as anticancer drug delivery system
    Autorzy:
    Jelonek, K.
    Kasperczyk, J.
    Li, S.
    Kaczmarczyk, B.
    Orchel, A.
    Musiał-Kulik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/284619.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    drug delivery system
    filomicelles
    polymeric Micelles
    Źródło:
    Engineering of Biomaterials; 2016, 19, 138; 53
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and Ontogenesis of a Marine Ciliate, Euplotes balteatus (Dujardin, 1841) Kahl, 1932 (Ciliophora, Euplotida) and Definition of Euplotes wilberti nov. spec.
    Autorzy:
    Pan, Ying
    Li, Liqiong
    Shao, Chen
    Hu, Xiaozhong
    Ma, Honggang
    Alrasheid, Khaled A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/763622.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Euplotes balteatus, Euplotes wilberti nov. spec., marine ciliate, morphology, ontogenesis
    Opis:
    Euplotes balteatus (Dujardin, 1841) Kahl 1932, collected from coastal waters near Qingdao, northern China, was investigated using live observation and silver staining methods. An improved diagnosis and morphometric data are provided. Euplotes balteatus can be identified by the following combination of characters: 10 frontoventral cirri, 2 widely separated marginal cirri, 2 fine caudal cirri, 8 dorsal kineties and a double-eurystomus type silverline system. Its morphogenesis, which is similar to that of several congeners, can be summarized as follows: (1) the opisthe’s oral primordium appears de novo under the pellicle whereas the old oral apparatus is retained by the proter; (2) two groups of frontoventral transverse cirral anlagen, each with five streaks, occur de novo and then develop into the frontoventral and transverse cirri separately according to the formula of “3:3:3:3:2” from left to right; (3) the anlagen for the marginal cirri occur de novo near the parental oral apparatus; (4) migratory cirri of both dividers derive from the anlagen near the paroral membrane; (5) the dorsal kinety anlagen come from dedifferentiation of the parental structures in the mid-body region; (6) caudal cirri are formed at the posterior ends of the two rightmost dorsal kineties. In the light of the present findings, it was concluded that the Antarctic population of E. balteatus reported by Song and Wilbert (2002) was misidentified. A new species, Euplotes wilberti nov. spec., is established for this population.
    Źródło:
    Acta Protozoologica; 2012, 51, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Systematic Analyses of the Genus Architricha and Pleurotricha curdsi (Ciliophora, Oxytrichidae), with Redescriptions of Their Morphology
    Autorzy:
    Xu, Yuan
    LI, Lifang
    Fan, Xinpeng
    Pan, Hongbo
    GU, Fukang
    Al-Farraj, Saleh A.
    Powiązania:
    https://bibliotekanauki.pl/articles/763754.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Opis:
    Two oxytrichids Architricha indica Gupta et al., 2006 and Pleurotricha curdsi (Shi et al. 2002) Gupta et al., 2003 collected in East China, were studied using live observation and the silver staining method. The description and morphometric characterization of the new populations were supplied. The Shanghai population of A. indica differs from the Indian population in the number of cirri in the third right marginal row (average of 16.8 vs. 21.1). The Shanghai population of P. curdsicorresponds well with the Indian population, but it differs from the other Chinese population in the number of right marginal rows (two vs. three). The early process of reorganization of A. indica was studied, and a difference on the formation of anlage V was found compared to the original report. The small subunit rRNA genes of both species were sequenced for the first time. The phylogenetic analyses based on SSU rRNA gene sequence data revealed that Architricha is sister to the assemblage of Pseudouroleptus caudatus and two Strongylidium, while P. curdsi clusters with its congener P. lanceolata and is located in Stylonychinae.
    Źródło:
    Acta Protozoologica; 2015, 54, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Focused Ion Beam Imaging of Defects in Multicrystalline Si for Photovoltaic Application
    Autorzy:
    Miyamura, Y.
    Sekiguchi, T.
    Chen, J.
    Li, J.
    Watanabe, K.
    Kumagai, K.
    Ogura, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198415.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.-a
    61.85.+p
    61.72.Ff
    Opis:
    We demonstrate the imaging of the extended defects in Si materials using a focused ion beam instrument. Since Ga-ion beam has small penetration depth and high channeling character compared with electron beam, the secondary electron signal of focused ion beam is more sensitive to the surface morphology and crystallinity. We have tried to use this secondary electron imaging of focused ion beam for observation of various extended defects in Si materials for photovoltaic and semiconductor devices. As for the texture of multicrystalline Si, some grains are imaged darker than the others. It suggests that the crystal orientation gives different channeling effect on the primary Ga-ion beam, resulting in the different secondary electron yield. The grain boundaries and lineage in multicrystalline Si are shown as bright lines and patterns in the image. Although it may reflect the surface morphologies, these contrasts may be attributed to the channeling contrast due to lattice displacement or distortion. The contrast mechanism of FIB imaging is discussed.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 991-993
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanism of Radiative Mn$\text{}^{2+}$ Intra-Shell Recombination in Bulk ZnMnS
    Autorzy:
    Ivanov, V. Yu.
    Godlewski, M.
    Yatsunenko, S.
    Khachapuridze, A.
    Li, M. S.
    Gołacki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2027501.pdf
    Data publikacji:
    2001-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.Gs
    76.30.Fc
    76.70.Hb
    78.55.Et
    Opis:
    Origin of a fast component of the photoluminescence decay of Mn$\text{}^{2+}$ intra-shell $\text{}^{4}$T$\text{}_{1}$ → $\text{}^{6}$A$\text{}_{1}$ transition is discussed based on the results of photoluminescence, photoluminescence kinetics and optically detected magnetic resonance experiments performed for bulk ZnMnS samples with about 1% Mn fraction. It is demonstrated that a fast component of the photoluminescence decay, reported previously for quantum dot structure and related to quantum confinement effects, is also observed in bulk samples and is related by us to very efficient spin cross-relaxation effects.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 3; 351-355
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Morphogenetic Description of Thigmokeronopsis stoecki Shao et al., 2008 (Ciliophora, Hypotricha) and a Comparison with Members of the Family Pseudokeronopsidae
    Autorzy:
    Chen, Xumiao
    Li, Jiqiu
    Hu, Xiaozhong
    Shao, Chen
    Al-Farraj, Saleh A.
    Al-Rasheid, Khaled A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/763473.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Hypotrichs, ontogenesis, Pseudokeronopsidae, Thigmokeronopsis
    Opis:
    The urostylid family Pseudokeronopsidae Borror and Wicklow, 1983 was considered to be a well-outlined taxon. Nevertheless, recent evidence, including morphological, ontogenetic, and molecular information, has consistently revealed the polyphyly of this family. In the present work, a new population of Thigmokeronopsis stoecki Shao et al., 2008 was found and its binary divisional process was described for the first time. In addition, the morphogenetic features of Thigmokeronopsis species and all the other pseudokeronopsids, for which detailed ontogenetic data are available, were rechecked and compared. This reveals that: (1) the ontogenetic process of T. stoecki corresponds well with its congeners T. jahodai and T. rubra except for the macronuclear behavior; (2) Apokeronopsis and Thigmokeronopsis share a similar ontogenetic mode despite of the differences in the number and origin of their buccal cirri; (3) most pseudokeronopsids share the same pattern in the origins of their oral primordia and fronto-ventral-transverse cirral anlagen, except for Pseudokeronopsis similis, which may not be a valid member of the family Pseudokeronopsidae.
    Źródło:
    Acta Protozoologica; 2013, 52, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study on the inhibitive effect of phytic acid as a corrosion inhibitor for Q235 mild steel in 1 M HCl environment
    Autorzy:
    Chidiebere, Maduabuchi A.
    Nwanonenyi, Simeon
    Njoku, Demian
    Iroha, Nkem B.
    Oguzie, Emeka E.
    Li, Ying
    Powiązania:
    https://bibliotekanauki.pl/articles/1113467.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Adsorption
    Corrosion
    Electrochemical techniques
    Inhibition
    Metals
    Plant extract
    Opis:
    The inhibitive action of phytic acid (PA) on Q235 mild steel corrosion in 1 M HCl environment was investigated using electrochemical techniques. Polarization results revealed PA to be a mixed- type inhibitor in 1 M HCl environment, while impedance results provide evidence of adsorption of the PA species on the corroding metal surface. The adsorption of PA obeyed Langmuir adsorption isotherm. Scanning electron microscopy (SEM), atomic force microscopy (AFM) and Fourier transform infrared spectroscopy (FTIR) studies all revealed the formation of a protective film adsorbed on the steel surface.
    Źródło:
    World News of Natural Sciences; 2017, 15; 1-19
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology of Two Novel Species of Chaenea (Ciliophora, Litostomatea): Chaenea paucistriata spec. nov. and C. sinica spec. nov.
    Autorzy:
    Fan, Xinpeng
    Xu, Yuan
    GU, Fukang
    LI, Jiqiu
    Al-Farraj, Saleh A.
    Al-Rasheid, Khaled A. S.
    Hu, Xiaozhong
    Powiązania:
    https://bibliotekanauki.pl/articles/763652.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Chaenea, ciliary pattern, identification key, marine ciliates, new species, taxonomy
    Opis:
    During faunistic studies of ciliates in coastal waters of Daya Bay and Bohai Bay, China, two previously unknown ciliates were discovered and investigated using standard taxonomic methods. Morphological comparative analyses revealed that they represent two novel species in the genus Chaenea. Chaenea paucistriata spec. nov. can be distinguished from its congeners by the following traits: body length in vivo about 180–250 µm; eight somatic kineties; dorsal brush rows 1–4 consisting of three, five, seven, and two dikinetids, respectively; rod-like extrusomes, 8 µm long; 63–94 macronuclei; cortical granules minute and colourless. Chaenea sinica spec. nov. differs from its congeners in having: body length in vivo about 140–240 µm; 17–21 somatic kineties; dorsal brush rows 1–4 consisting of 3–7, 10 or 11, 11–13, and 3–6 dikinetids, respectively; rod-like extrusomes about 6–8 µm long; 71–164 macronuclei. A key is presented to assist the identification of all Chaenea species.
    Źródło:
    Acta Protozoologica; 2015, 54, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The distribution of different virulence grass carp reovirus strains in some neglected tissues
    Autorzy:
    Liang, H.R.
    Fu, X.Z.
    Li, N.Q.
    Liu, L.H.
    Lin, Q.
    Li, Y.G.
    Peng, Y.A.
    Huang, Z.B.
    Wu, S.Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/30668.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Apogastrostyla rigescens (Kahl, 1932) gen. nov., comb. nov. (Ciliophora, Hypotricha): Morphology, Notes on Cell Division, SSU rRNA Gene Sequence Data, and Neotypification
    Autorzy:
    LI, Liqiong
    HUANG, Jie
    SONG, Weibo
    SHIN, Mann Kyoon
    AL-RASHEID, Khaled A. S.
    BERGER, Helmut
    Powiązania:
    https://bibliotekanauki.pl/articles/763788.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    China, ecology, Hemigastrostyla, infraciliature, ontogenesis, Spirotricha, Stichotrichia, Yellow Sea
    Opis:
    The morphology, the infraciliature, some stages of cell division and physiological reorganization, and the SSU rRNA gene sequence of the little-known marine 18-cirri hypotrich Tachysoma rigescens (Kahl, 1932) Borror, 1972 [basionym Oxytricha (Tachysoma) rigescens], isolated from mariculture waters near Qingdao, China, were investigated. This rare species is characterized, inter alia, by narrowly spaced, small, colourless cortical granules and several conspicuous ring-shaped structures in the cytoplasm. The caudal cirri and the simple dorsal kinety pattern (three bipolar kineties) are probably plesiomorphic traits within the Hypotricha, the composition of the adoral zone of the proter from new and parental membranelles, as well as the presence of two ‘extra’ cirri behind the right marginal row strongly suggest a misclassification in Tachysoma. The SSU rRNA gene sequence data indicate that T. rigescens branches off rather basally in the Hypotricha tree, which supports the hypothesis that the 18-cirri pattern occurred very early, probably already in the last common ancestor of the Hypotricha. A detailed survey of the early branching 18-cirri hypotrichs and similar taxa (e.g. Trachelostyla pediculiformis, Hemigastrostyla enigmatica, Protogastrostyla pulchra) reveals that for T. rigescens a new genus (Apogastrostyla gen. nov.) has to be established, because there are important differences, inter alia, in the dorsal infraciliature. Besides the type species, A. rigescens comb. nov., which seems to be confined to the northern hemisphere according to the sparse faunistic data, a second marine species, A. szaboi comb. nov. (basionym Hemigastrostyla szaboi), so far only twice recorded from the Antarctic region, can be included. The Chinese population is fixed as neotype to define the species objectively, because no type material of A. rigescens is present and the original type locality is not known. The species name Tachysoma multinucleate is emended: Tachysoma multinucleatum nom. corr.
    Źródło:
    Acta Protozoologica; 2010, 49, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of TaqMan-based real-time PCR assay based on the E1 genefor the quantitative detection of the Getah virus
    Autorzy:
    Lin, A.
    Hu, X.
    Cui, S.
    Yang, T.
    Zhang, Z.
    Li, P.
    Guo, M.
    Lu, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/16647453.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Getah virus
    real-time PCR
    TaqMan
    detection
    Opis:
    To develop a sensitive, specific, and rapid approach for the detection Getah virus (GETV), a set of primers targeting the conserved region of the E1 gene was created. The TaqMan-based real-time PCR method for GETV detection was developed by optimizing the reaction conditions. The method demonstrated excellent specificity, and amplification did not occur with the causative agents of all prevalent swine viral infections (CSFV, PRRSV, PRV, PEDV, PTV, and JEV), except GETV. Additionally, upon assessing the sensitivity of the method, the minimum detection limit for GETV was found to be 5.94 copies/μL, which is 10 times higher than that of the traditional PCR approach. Further, the intra- and inter-assay variation coefficients were less than 1%, demonstrating good repeatability. Moreover, GETV was found in 10 of the 20 field serum samples using real-time PCR but only in three of the samples using traditional PCR. Consequently, the first GETV TaqMan-based real-time PCR approach based on the E1 gene was developed for GETV pathogenic diagnoses, and this exhibited high specificity, sensitivity, and repeatability. This assay is practical for the pathogenic diagnosis and epidemiology of GETV.
    Źródło:
    Polish Journal of Veterinary Sciences; 2023, 26, 1; 21-28
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological Redescription and SSU rDNA-based Phylogeny of Two Freshwater Ciliates, Uronema nigricans and Lembadion lucens (Ciliophora, Oligohymenophorea), with Discussion on the Taxonomic Status of Uronemita sinensis
    Autorzy:
    Liu, Mingjian
    Li, Lifang
    Qu, Zhishuai
    Luo, Xiaotian
    Al-Farraj, Saleh A.
    Lin, Xiaofeng
    Hu, Xiaozhong
    Powiązania:
    https://bibliotekanauki.pl/articles/52376310.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Ciliature
    phylogeny
    freshwater ciliate
    SSU rDNA
    Uronema nigricans
    Lembadion lucens
    Opis:
    The morphology and phylogeny of two poorly known species, Uronema nigricans (Müller, 1786) Florentin, 1901 and Lembadion lucens (Maskell, 1887) Kahl, 1931, were respectively collected from a eutrophic freshwater river in Shenzhen and an oligotrophic lake in Zhanjiang (both in southern China) and investigated using standard taxonomic methods. The sampled population of Uronema nigricanswas characterized by a cell size of 30–40 μm × 12–20 μm in vivo, an elongated elliptical outline with a prominent apical plate, and 13–15 somatic kineties. The sampled population of Lembadion lucenswas characterized by a cell size of 45–80 μm × 20–50 μm in vivo, 25–35 somatic kineties, five or six caudal kinetosomes with cilia about 20 μm in length, and a single right-positioned contractile vacuole.The small subunit ribosomal RNA gene (SSU rDNA) of these species was sequenced and compared with those of their congeners to reveal nucleotide differences. The phylogenetic trees showed that the Shenzhen population of Uronema nigricans clusters with two other sequences under the name of “Uronema nigricans” (which are possibly misidentified) and then groups with Uronemita sinensis (Pan et al., 2013) Liu et al., 2016 with full support. Phylogenetic analyses indicated that genus Lembadion is monophyletic with full support provided by both Bayesian inference and maximum likelihood algorithms. Based on analyses of morphological and sequence data, Uronemita sinensis may represent a new genus between Uronema and Uronemita.
    Źródło:
    Acta Protozoologica; 2017, 56, 1; 17-37
    0065-1583
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Small-for-gestational age prevalence risk factors in central Appalachian states with mountain-top mining
    Autorzy:
    Ferdosi, Hamid
    Lamm, Steve H.
    Afari-Dwamena, Nana A.
    Dissen, Elisabeth
    Chen, Rusan
    Li, Ji
    Feinleib, Manning
    Powiązania:
    https://bibliotekanauki.pl/articles/2161794.pdf
    Data publikacji:
    2017-10-18
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    tobacco
    mining
    maternal smoking
    small for gestational age
    mountain-top mining
    SGA prevalence
    Opis:
    Objectives: To identify risk factors for small-for-gestational age (SGA) for counties in central Appalachian states (Kentucky (KY), Tennessee (TN), Virginia (VA), and West Virginia (WV)) with varied coal mining activities. Material and Methods: Live birth certificate files (1990–2002) were used for obtaining SGA prevalence rates for mothers based on the coal mining activities of their counties of residence, mountain-top mining (MTM) activities, underground mining activities but no mountain-top mining activity (non-MTM), or having no mining activities (non-mining). Co-variable information, including maternal tobacco use, was also obtained from the live birth certificate. Adjusted odds ratios were obtained using multivariable logistic regression comparing SGA prevalence rates for counties with coal mining activities to those without coal mining activities and comparing SGA prevalence rates for counties with coal mining activities for those with and without mountain-top mining activities. Comparisons were also made among those who had reported tobacco use and those who had not. Results: Both tobacco use prevalence and SGA prevalence were significantly greater for mining counties than for non-mining counties and for MTM counties than for non-MTM counties. Adjustment for tobacco use alone explained 50% of the increased SGA risk for mining counties and 75% of the risk for MTM counties, including demographic pre-natal care co-variables that explained 75% of the increased SGA risk for mining counties and 100% of the risk for MTM. The increased risk of SGA was limited to the third trimester births among tobacco users and independent of the mining activities of their counties of residence. Conclusions: This study demonstrates that the increased prevalence of SGA among residents of counties with mining activity was primarily explained by the differences in maternal tobacco use prevalence, an effect that itself was gestational-age dependent. Self-reported tobacco use marked the population at the increased risk for SGA in central Appalachian states. Int J Occup Med Environ Health 2018;31(1):11–23
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2018, 31, 1; 11-23
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology of Three Aloricate Choreotrich ciliates, Including Description of a New Species Parastrombidinopsis costalis sp. n. (Ciliophora, Choreotrichia), and phylogeny of the genus Parastrombidinopsis
    Autorzy:
    Song, Wen
    Li, Jiamei
    Huang, Yaoyao
    Hu, Xiaozhong
    Liu, Weiwei
    Al-Rasheid, Khaled A. S.
    Miao, Miao
    Powiązania:
    https://bibliotekanauki.pl/articles/52258906.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    choreotrich ciliates
    ciliature
    new combination
    Strombidinopsidae
    SSU rRNA gene
    taxonomy
    Opis:
    As a follow-up part of our studies of the tropical ciliate fauna carried out in the last decade, we investigated the morphology and phylogeny of three choreotrich ciliates, viz, Parastrombidinopsis costalis sp. n., P. pelagica (Fauré-Fremiet, 1924) comb. n. and P. minima Tsai et al., 2008. The new species is characterized by its unique asymmetrical cell shape, 19–21 collar membranelles, one buccal membrane, and eight unevenly distributed somatic kineties. An improved diagnosis of P. pelagica(Fauré-Fremiet, 1924) comb. n.is given based on the original and current studies, the species is characterized by a large cell size, an elongate obconical cell shape, 31–36 collar membranelles and 13–15 somatic kineties. The species P. minimais redescribed based on a new population with some new features supplemented. SSU rRNA genes of both the new species and P. minima were sequenced and a phylogenetic review of related taxa obtained has been performed in order to reveal their systematic relationships. The monophyly of the genus Parastrombidinopsis is highly supported in our phylogenetic analyses.
    Źródło:
    Acta Protozoologica; 2018, 57, 3; 153-167
    0065-1583
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction, Chemical Composition and Antidiabetic Potential of Crude Polysaccharides from Centella asiatica (L.) Urban
    Autorzy:
    Li, Meng
    Shahid, Muhammad
    Zhang, Xiaobin
    Law, Douglas
    Mackeen, Mukram M.
    Teh, Arnida H.
    Najm, Ahmad A.
    Fazry, Shazrul
    Othman, Babul A.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341117.pdf
    Data publikacji:
    2024-05-24
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    alcohol insoluble residue
    antidiabetic
    mineral elements
    monosaccharide composition
    response surface methodology
    Opis:
    The global prevalence of diabetes mellitus (DM) is escalating, posing a significant challenge to human healthcare systems. In the present study, mineral and monosaccharide compositions, and antidiabetic potential of polysaccharide fractions separated from Centella asiatica (L.) leaves (CAL) were assessed. Initial single-factor experiments identified key extraction parameters, further optimized through response surface methodology (RSM) with optimal conditions determined as a liquid-to-solid ratio of 24.43:1 (mL/g), extraction time of 60.76 min, and a temperature of 83.31℃. Alcohol insoluble residue (AIR) extraction yielded three crude polysaccharide fractions (P50, P70, and P90). P50 was obtained with the highest yield (14.31%) and exhibited the highest content of total sugars and uronic acids (68.01 and 24.28 g/100 g, respectively). Calcium, magnesium, and manganese were dominant minerals in P50 and P70. Monosaccharide composition analysis via high-performance liquid chromatography (HPLC) demonstrated enrichment of galacturonic acid, galactose, and arabinose in P50 and P70. Furthermore, both fractions (P50 and P70) exhibited dose-dependent inhibitory effects on α-amylase and α-glucosidase. At 5 mg/mL, P50 caused 68.3% α-amylase inhibition and 62.3% α-glucosidase inhibition, while P70 triggered 46.8% and 34.1% inhibition, respectively. In conclusion, this study is the first to provide valuable insights into optimizing CAL extraction conditions. Potential utilization of polysaccharide fractions obtained from CAL as components for formulating functional foods can be explored in the future.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2024, 74, 2; 177-187
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-Probe Measurements of Electron Transport in GaN:Si/(Ga,Mn)N/GaN:Si Spin Filter Structures
    Autorzy:
    Kalbarczyk, K.
    Foltyn, M.
    Grzybowski, M.
    Stefanowicz, W.
    Adhikari, R.
    Li, Tian
    Kruszka, R.
    Kamińska, E.
    Piotrowska, A.
    Bonanni, A.
    Dietl, T.
    Sawicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398574.pdf
    Data publikacji:
    2016-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.25.Dc
    73.40.Cg
    73.43.Qt
    78.55.Cr
    Opis:
    Results of two-probe magnetoresistance studies in GaN:Si/(Ga,Mn)N/GaN:Si prospective spin filter structures are reported. It is postulated that transport characteristics are strongly influenced by highly conductive threading dislocations and that shrinking of the device size partially mitigates the issue. Simultaneously, maxima at ≈1500 Oe on overall weak, up to 2%, negative magnetoresistance are seen at low temperature, whose origin has been tentatively assigned to effects taking place at the contacts areas.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 5; 1196-1198
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of epitaxial LSMO films grown on STO substrates
    Autorzy:
    Španková, M.
    Štrbík, V.
    Chromik, Š.
    Zheng, D.
    Li, J.
    Machajdík, D.
    Kobzev, A.
    Plecenik, T.
    Sojková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1054697.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Ps
    75.47.Lx
    75.70.Ak
    81.15.Fg
    Opis:
    Epitaxial manganite La_{0.67}Sr_{0.33}MnO₃ (LSMO) layers, with a thickness of 20-50 nm, are prepared on single crystal (001) SrTiO₃ (STO) substrates by pulsed laser deposition technique. Structural characterization (composition analysis, surface morphology), investigated by the Rutherford backscattering spectroscopy and atomic force microscopy, reveals the growth of stoichiometric LSMO films with a smooth surface (root-mean-square value of 0.21-1.6 nm). The prepared LSMO films possess high Curie temperature ( ≈ 412 K), low room temperature resistivity (1-2 mΩ cm) and maximum of temperature coefficient of resistivity TCR = 2.7% K¯¹ at 321 K.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 848-850
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nanoquasicrystalline Phase in Mechanically Alloyed and Heat-Treated $Al_{73}Cu_{11}Cr_{16}$
    Autorzy:
    Sviridova, T.
    Shevchukov, A.
    Shelekhov, E.
    Diakonov, D.
    Gorshenkov, M.
    Kaloshkin, S.
    Tcherdyntsev, V.
    Li, Z.
    Fan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373670.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.44.Br
    64.70.kd
    61.05.cp
    61.05.J-
    Opis:
    X-ray diffraction analysis, scanning and transmission electron microscopy, thermal analysis and measurement of chemical composition were implemented to determine structure, thermal stability and chemical composition of the decagonal quasicrystal in $Al_{73}Cu_{11}Cr_{16}$ alloy produced by long-term mechanical alloying of elemental powders followed by annealing at 700°C. According to the TEM investigation such a technique permits to produce a single-phase nanostructural quasicrystal with grain size about 60 nm. Differential thermal analysis revealed that the decagonal phase does not exist above 923°C and undergoes incongruent two-stage melting coming to the end at 1100°C.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 2; 599-602
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photovaractor performance for optically controlled microwave circuits
    Autorzy:
    Malyshev, S.A.
    Andrievski, V.F.
    Budko, T.O.
    Chao, C.
    Chizh, A.L.
    Gushchinskaya, E.V.
    Baolin, L.
    Romanova, L.I.
    Zaporozhets, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/308783.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    circuits
    photovaractor
    optically controlled
    Opis:
    The photovaractor for optically controlled microwave circuits was designed and studied. The photovaractor module was fabricated as a planar p-i-n photodiode chip placed in a fibre optic matching receptacles. Study of C-V characteristics in the light illumination mode has shown that capacitance characteristics are strongly dependent on the light illumination power. These variations of the photovaractor diode capacitance are large enough to be used in optically controlled circuits such as oscillators, mixers and switchers.
    Źródło:
    Journal of Telecommunications and Information Technology; 2002, 1; 14-17
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetooptical Properties of (Ga,Fe)N Layers
    Autorzy:
    Papierska, J.
    Rousset, J.
    Pacuski, W.
    Kossacki, P.
    Golnik, A.
    Nawrocki, M.
    Gaj, J.
    Suffczyński, J.
    Kowalik, I.
    Stefanowicz, W.
    Sawicki, M.
    Dietl, T.
    Navarro-Quezada, A.
    Faina, B.
    Li, T.
    Bonanni, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492954.pdf
    Data publikacji:
    2011-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    75.30.Hx
    78.20.Ls
    71.35.Ji
    Opis:
    Magnetooptical properties of (Ga,Fe)N layers containing various concentrations of Fe-rich nanocrystals embedded in paramagnetic (Ga,Fe)N layers are reported. Previous studies of such samples demonstrated that magnetization consists of a paramagnetic contribution due to substitutional diluted Fe ions as well as of ferromagnetic and antiferromagnetic components originating from Fe-rich nanocrystals, whose relative abundance can be controlled by the growth conditions. The nanocrystals are found to broaden and to reduce the magnitude of the excitonic features. However, the ferromagnetic contribution, clearly seen in SQUID magnetometry, is not revealed by magnetic circular dichroism. Possible reasons for differences in magnetic response determined by magnetic circular dichroism and SQUID measurements are discussed.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 5; 921-923
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comprehensive surveillance of the antibody response to Borrelia burgdorferi s.l. in small ruminants in China
    Autorzy:
    Yang, J.
    Liu, Z.
    Guan, G.
    Li, Y.
    Chen, Z.
    Ma, M.
    Liu, A.
    Ren, Q.
    Wang, J.
    Luo, J.
    Yin, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/49708.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2015, 22, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Principy razrabotki receptur napolnitelejj dlja insekticidnykh aehrozolnykh ballonov
    Zasady opracowania składu środków owadobójczych do napełniania aparatów aerozolowych
    The principles underlying the development of filler formulations for insecticidal aerosol dispensers
    Autorzy:
    Vashkov, V.I.
    Cetlin, V.M.
    Brikman, L.I.
    Bessonova, I.V.
    Zhuk, E.B.
    Volkova, A.P.
    Roginskaja, E.J.
    Jankovskijj, E.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/840946.pdf
    Data publikacji:
    1967
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    1. Przy opracowywaniu składu mieszanin insektycydów do napełniania aparatów aerozolowych uwzględnia się fakt, że w jednych przypadkach są one stosowane do zwalczania owadów latających, w innych do zwalczania owadów pełzających. W pierwszym przypadku wprowadzono insektycydy o działaniu natychmiastowym, lecz nietrwałym, podczas gdy w drugim wprowadzono insektycydy o gwałtownym i trwałym działaniu. 2. Wybór preparatu do aparatów aerozolowych dla insektycydów oparty jest na współczynniku niebezpieczeństwa grożącego człowiekowi przy wdychaniu danego czynnika (Ki.d.) Ki.d. = L/PLC, gdzie L = stężenie danego czynnika w powietrzu (mg/m³) , PLC = dopuszczalna granica stężenia dla danego czynnika w powietrzu (mg/m³) nieszkodliwa dla człowieka. Do zwalczania latających owadów można używać środków, dla których Ki.d. > 1 (DDVP i inne), do zwalczania owadów pełzających takich środków, dla których Ki.d.< 1 (DDT, dieldrin, rogor, chlorofos i inne); stosując czynniki mające Ki.d. > 1 do zwalczania owadów pełzających przedsięwzięto kroki do zredukowania szybkości parowania. 3. Iloczyn stężenia preparatu w chmurze aerozolowej C (mg/m³) i czasu potrzebnego do zabicia wszystkich owadów τ (min) stosujemy jako kryterium oceny porównawczej aktywności owadobójczej aerozolu zastosowanego do zwalczania owadów latających. Iloczyn C jest w pewnych granicach, w tych samych warunkach, wielkością stałą. 4. Na podstawie przytoczonych zasad opracowaliśmy następujące składy środków owadobójczych: (a) do zwalczania owadów latających oparte na DDVP i jego mieszamme z pybutrinem; (b) do zwalczania owadów pełzających oparte na mieszaninie DDT i gamma-HCH.
    Źródło:
    Annals of Parasitology; 1967, 13, 4-5
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vertical transmission of PCV2b to fetuses in sows intramuscularly infected with PCV2b
    Autorzy:
    Wang, N.D.
    Li, J.J.
    Wang, A.B.
    Zhu, Z.
    Chang, Y.
    Mao, Y.
    Zan, Y.
    Wang, Z.F.
    Deng, Z.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/31535.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    In order to investigate whether PCV2b can be transmitted across the placenta in sows thereby causing vertical infection of fetuses, six sows in 75 day of pregnancy were either intramuscularly inoculated with a PCV2b culture supernatant (n = 4) or mock infected with cell culture supernatant (n = 2). At parturition, 3 newborn piglets from each litter were randomly selected and euthanatized prior to suckling. Samples of the mesenteric lymph nodes, spleens, kidneys, hearts and lungs were collected for PCR, histopathological and immunohistochemical assays. The results showed that the newborn piglets from PCV2b-infected sows had histopathological lesions in the tested tissues. Moreover, PCV2b antigen and DNA were detected as well. These findings therefore suggested that porcine circovirus type 2b can be transmitted across the placenta of sows, thereby leading to PCV2b vertical infection of the fetuses.
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Principy razrabotki receptur napolnitelejj dlja insekticidnykh aehrozolnykh ballonov
    Zasady opracowania składu środków owadobójczych do napełniania aparatów aerozolowych
    The principles underlying the development of filler formulations for insecticidal aerosol dispensers
    Autorzy:
    Vashkov, V.I.
    Cetlin, V.M.
    Brikman, L.I.
    Bessonova, I.V.
    Zhuk, E.B.
    Volkova, A.P.
    Roginskaja, E.J.
    Jankovskijj, E.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2177831.pdf
    Data publikacji:
    1967
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    1. Przy opracowywaniu składu mieszanin insektycydów do napełniania aparatów aerozolowych uwzględnia się fakt, że w jednych przypadkach są one stosowane do zwalczania owadów latających, w innych do zwalczania owadów pełzających. W pierwszym przypadku wprowadzono insektycydy o działaniu natychmiastowym, lecz nietrwałym, podczas gdy w drugim wprowadzono insektycydy o gwałtownym i trwałym działaniu. 2. Wybór preparatu do aparatów aerozolowych dla insektycydów oparty jest na współczynniku niebezpieczeństwa grożącego człowiekowi przy wdychaniu danego czynnika (Ki.d.) Ki.d. = L/PLC, gdzie L = stężenie danego czynnika w powietrzu (mg/m³) , PLC = dopuszczalna granica stężenia dla danego czynnika w powietrzu (mg/m³) nieszkodliwa dla człowieka. Do zwalczania latających owadów można używać środków, dla których Ki.d. > 1 (DDVP i inne), do zwalczania owadów pełzających takich środków, dla których Ki.d.< 1 (DDT, dieldrin, rogor, chlorofos i inne); stosując czynniki mające Ki.d. > 1 do zwalczania owadów pełzających przedsięwzięto kroki do zredukowania szybkości parowania. 3. Iloczyn stężenia preparatu w chmurze aerozolowej C (mg/m³) i czasu potrzebnego do zabicia wszystkich owadów τ (min) stosujemy jako kryterium oceny porównawczej aktywności owadobójczej aerozolu zastosowanego do zwalczania owadów latających. Iloczyn C jest w pewnych granicach, w tych samych warunkach, wielkością stałą. 4. Na podstawie przytoczonych zasad opracowaliśmy następujące składy środków owadobójczych: (a) do zwalczania owadów latających oparte na DDVP i jego mieszamme z pybutrinem; (b) do zwalczania owadów pełzających oparte na mieszaninie DDT i gamma-HCH.
    Źródło:
    Wiadomości Parazytologiczne; 1967, 13, 4-5; 463-468
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite Element Analysis on Structural Behaviour of Geopolymer Reinforced Concrete Beam using Johnson-Cook Damage in ABAQUS
    Autorzy:
    Mortar, Nurul Aida Mohd
    Al Bakri Abdullah, Mohd Mustafa
    Hussin, Kamarudin
    Razak, Rafiza Abdul
    Hamat, Sanusi
    Hilmi, Ahmad Humaizi
    Shahedan, Noorfifi Natasha
    Li, Long Yuan
    Aziz, Ikmal Hakem A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2174588.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fly ash geopolymer
    geopolymer concrete
    finite element analysis
    Johnson Cook Damage
    ABAQUS software
    Opis:
    This paper details a finite element analysis of the behaviour of Si-Al geopolymer concrete beam reinforced steel bar under an impulsive load and hyper velocity speed up to 1 km/s created by an air blast explosion. The initial torsion stiffness and ultimate torsion strength of the beam increased with increasing compressive strength and decreasing stirrup ratio. The study involves building a finite element model to detail the stress distribution and compute the level of damage, displacement, and cracks development on the geopolymer concrete reinforcement beam. This was done in ABAQUS, where a computational model of the finite element was used to determine the elasticity, plasticity, concrete tension damages, concrete damage plasticity, and the viability of the Johnson-Cook Damage method on the Si-Al geopolymer concrete. The results from the numerical simulation show that an increase in the load magnitude at the midspan of the beam leads to a percentage increase in the ultimate damage of the reinforced geopolymer beams failing in shear plastic deformation. The correlation between the numerical and experimental blasting results confirmed that the damage pattern accurately predicts the response of the steel reinforcement Si-Al geopolymer concrete beams, concluded that decreasing the scaled distance from 0.298 kg/m3 to 0.149 kg/m3 increased the deformation percentage.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1349--1354
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A regional comparison of children’s blood cadmium, lead, and mercury in rural, urban and industrial areas of six European countries, and China, Ecuador, and Morocco
    Autorzy:
    Hrubá, Františka
    Černá, Milena
    Chen, Chunying
    Harari, Florencia
    Horvat, Milena
    Koppová, Kvetoslava
    Krsková, Andrea
    Laamech, Jawhar
    Li, Yu-Feng
    Löfmark, Lina
    Lundh, Thomas
    Lyoussi, Badiaa
    Mazej, Darja
    Osredkar, Joško
    Pawlas, Krystyna
    Pawlas, Natalia
    Prokopowicz, Adam
    Rentschler, Gerda
    Snoj Tratnik, Janja
    Sommar, Johan
    Spěváčková, Věra
    Špirić, Zdravko
    Skerfving, Staffan
    Bergdahl, Ingvar A.
    Powiązania:
    https://bibliotekanauki.pl/articles/21375677.pdf
    Data publikacji:
    2023-09-07
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    biological monitoring
    child
    mercury
    lead
    environmental pollutants
    cadmium
    Opis:
    Objectives The authors aimed to evaluate whether blood cadmium (B-Cd), lead (B-Pb) and mercury (B-Hg) in children differ regionally in 9 countries, and to identify factors correlating with exposure. Material and Methods The authors performed a cross-sectional study of children aged 7–14 years, living in 2007–2008 in urban, rural, or potentially polluted (“hot spot”) areas (ca. 50 children from each area, in total 1363 children) in 6 European and 3 non-European countries. The authors analysed Cd, Pb, and total Hg in blood and collected information on potential determinants of exposure through questionnaires. Regional differences in exposure levels were assessed within each country. Results Children living near industrial “hot-spots” had B-Cd 1.6 (95% CI: 1.4–1.9) times higher in the Czech Republic and 2.1 (95% CI:1.6–2.8) times higher in Poland, as compared to urban children in the same countries (geometric means [GM]: 0.13 μg/l and 0.15 μg/l, respectively). Correspondingly, B-Pb in the “hot spot” areas was 1.8 (95% CI: 1.6–2.1) times higher than in urban areas in Slovakia and 2.3 (95% CI: 1.9–2.7) times higher in Poland (urban GM: 19.4 μg/l and 16.3 μg/l, respectively). In China and Morocco, rural children had significantly lower B-Pb than urban ones (urban GM: 64 μg/l and 71 μg/l, respectively), suggesting urban exposure from leaded petrol, water pipes and/or coal-burning. Hg “hot spot” areas in China had B-Hg 3.1 (95% CI: 2.7–3.5) times higher, and Ecuador 1.5 (95% CI: 1.2–1.9) times higher, as compared to urban areas (urban GM: 2.45 μg/l and 3.23 μg/l, respectively). Besides industrial exposure, traffic correlated with B-Cd; male sex, environmental tobacco smoke, and offal consumption with B-Pb; and fish consumption and amalgam fillings with B-Hg. However, these correlations could only marginally explain regional differences. Conclusions These mainly European results indicate that some children experience about doubled exposures to toxic elements just because of where they live. These exposures are unsafe, identifiable, and preventable and therefore call for preventive actions.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 3; 349-364
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cadmium, mercury and lead in the blood of urban women in Croatia, the Czech Republic, Poland, Slovakia, Slovenia, Sweden, China, Ecuador and Morocco
    Autorzy:
    Pawlas, Natalia
    Strömberg, Ulf
    Carlberg, Bo
    Cerna, Milena
    Harari, Florencia
    Harari, Raúl
    Horvat, Milena
    Hruba, Frantiska
    Koppova, Kvetoslava
    Krskova, Andrea
    Krsnik, Mladen
    Li, Yu-Feng
    Löfmark, Lina
    Lundh, Thomas
    Lundström, Nils-Göran
    Lyoussi, Badiaâ
    Markiewicz-Górka, Iwona
    Mazej, Darja
    Osredkar, Josko
    Pawlas, Krystyna
    Rentschler, Gerda
    Spevackova, Vera
    Spiric, Zdravko
    Tratnik, Janja S.
    Vadla, Draženka
    Zizi, Soumia
    Skerfving, Staffan
    Bergdahl, Ingvar A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2179791.pdf
    Data publikacji:
    2013-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    cadmium
    mercury
    lead
    blood
    urban women
    european cities
    non-european cities
    Opis:
    Objectives: The aim of the study was to make an international comparison of blood levels of cadmium (B-Cd), lead (BPb) and mercury (B-Hg) of women in seven European, and three non-European cities, and to identify determinants. Materials and Methods: About 50 women (age: 46–62) from each city were recruited (totally 480) in 2006–2009. Interview and questionnaire data were obtained. Blood samples were analysed in one laboratory to avoid interlaboratory variation. Results: Between the European cities, the B-Pb and B-Cd results vary little (range of geometric means: 13.5–27.0 μg/l and 0.25–0.65 μg/l, respectively); the variation of B-Hg was larger (0.40–1.38 μg/l). Between the non-European cities the results for B-Pb, B-Cd and B-Hg were 19.2–68.0, 0.39–0.99 and 1.01–2.73 μg/l, respectively. Smoking was a statistically signifi cant determinant for B-Cd, while fi sh and shellfi sh intakes contributed to B-Hg and B-Pb, amalgam fi llings also contributed to B-Hg. Conclusions: The present results confi rm the previous results from children; the exposure to lead and cadmium varies only little between different European cities suggesting that other factors than the living area are more important. The study also confi rms the previous fi ndings of higher cadmium and lead levels in some non-European cities. The geographical variation for mercury is signifi cant.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 58-72
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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