Temat: coupling effect - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Education for Sustainability in Poland – A Narrative Literature Review
Autorzy:: Scrobota, Magda
Tematy:: sustainability, sustainable development, education, Poland, de-coupling effect, literature review; Pokaż więcej
Wydawca:: Fundacja Pro Scientia Publica
Powiązania:: https://bibliotekanauki.pl/articles/627992.pdf Link otwiera się w nowym oknie
Opis:: As a member state of the European Union, Poland is committed to sustainability by endorsing the principles of sustainable development in its Constitution and adopting European standards. However, to overcome the societal, environmental and economic demands, a society needs to integrate sustainability concepts into daily practices, education playing a crucial role in achieving this objective. This paper aims to provide an overview of the education for sustainability in Poland and its impact on Polish society. Designed as a narrative literature review, the paper reports on how education for sustainability was carried out between 1994 and 2013, building a detailed picture of the educational programs and actions conducted in business and non –profit organizations. Additionally it is revealed that although challenging, creating community-based learning can increase people’s awareness and potential to contribute to a sustainable future by reducing the de-coupling effect between organizational actual practices and declarations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Coupling effect between magnetic wires and its influence on high gradient magnetic separation performance
Autorzy:: Jiang, Yaxiong
Zeng, Jianwu
Cao, Mengbing
Yu, Weijun
Xie, Enlong
Chen, Luzheng
Tematy:: high gradient magnetic separation
matrix
coupling effect
weakly magnetic particles; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/58971355.pdf Link otwiera się w nowym oknie
Opis:: High gradient magnetic separation (HGMS) is effective for the separation of weakly magnetic minerals, and this method is achieved through the use of matrix, which is made of huge numbers of rod wires. So that the coupling effect of magnetic field and flow field between wires has a marked effect on the HGMS performance. In the investigation, the coupling effect between magnetic wires and its influence on high gradient magnetic separation performance were theoretically described and simulated using COMSOL Multiphysics. It is found that the magnetic field round a wire would be affected by the neighboring wires, and then a coupling effect of magnetic field between wires was produced, increasing the magnetic induction intensity on the upstream and downstream of wire surface. And the coupling effect of flow field could increase the slurry velocity at the regions of the wire surface with azimuth angles of 0° and 90°, which is beneficial for the selective capture of wire. These simulated results were basically validated with the experimental separation, using an innovative Magnetic Capture Analysis Method. It is found that the wire spacing has significant effect on the coupling effect of magnetic wires, and a critical spacing for wires could achieve an excellent coupling effect, which is beneficial for the improvement of HGMS performance. This investigation contributes to improve HGMS performance in concentrating fine weakly magnetic ores.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Nonlinear dynamic model of a turbine blade considering vibration and crack coupling
Autorzy:: Wang, Yujiang
Luo, Deyi
Huang, Yuanxing
Peng, Yue
Wang, Xudong
Yan, Xingwang
Xiao, Hongming
Huang, Zhongling
Tematy:: runner blade
vibration and crack coupling effect
dynamic model
nonlinear
vibration fatigue; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/63161974.pdf Link otwiera się w nowym oknie
Opis:: In order to further investigate dynamic characteristics of turbine runner blades under the coupling effect of vibration and crack, in this article, a runner blade with a crack was taken as the research object. The coupling effect of vibration and crack was analyzed, a nonlinear dynamic model considering the coupling of the runner blade was developed, and the vibration and fatigue characteristics were investigated. First, based on the contact characteristics of the breathing crack surfaces in the runner blade under hydraulic excitation, a breathing crack surface contact model was established. Subsequently, a nonlinear dynamic model considering the coupling effect of vibration and crack was obtained. The crack surface contact force and crack stiffness matrix were established and the vibration and fatigue characteristics were analyzed. Finally, the feasibility of the dynamic model was verified by a case study, and the dynamic and vibration fatigue characteristics under the coupling effect of vibration and crack were revealed. The research results show that with propagation of the crack, the crack surface contact force increases and the dynamic stress amplitude at the crack tip increases as well. When the sum of the frequency of the hydraulic excitation and the crack surface contact force acting on the runner blade is close to the natural frequency of the runner blade, a combined resonance will occur. When the coupling effect of vibration and crack is taken into consideration, the vibration fatigue crack propagation model is more accurate and can provide a basis for fatigue strength and life prediction of runner blades.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Calculating surface current distribution in antenna array in the presence of mutual coupling by analytical solving of Pocklington’s integral equation
Autorzy:: Parhizgar, N.
Tematy:: antenna array
current distribution
DOA estimation
MUSIC algorithm
mutual coupling effect
Pocklington’s integral equation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/141622.pdf Link otwiera się w nowym oknie
Opis:: In this article, the current distribution of an antenna array in the presence of mutual coupling is calculated analytically by solving Pocklington’s integral equation. Blockpulse and Galerkin’s functions are used for numerical solving of Pocklington’s integral equation. In this work, the surface current distribution can be achieved for an antenna array in receiving mode, with any arbitrary structure and various numbers of elements. In all previous works, the authors have been tried to solve Pocklington’s integral equation for a single half dipole antenna in transmitting mode. Pocklington’s equation is somehow difficult to work with because of the singularity and existence of a sharp peak for a small value of wire’s radius. In order to calculate surface current distribution, for thin wires, singularity part is extracted from the kernel in aforementioned integral. Hence, the kernel is decomposed into singular and nonsingular parts. An inter-element mutual coupling effect between array elements and self-coupling for each element are assumed in this case. The validity of the proposed methodology is tested by numerical simulation results. The accuracy of the proposed method is evaluated by the multiple signal classification (MUSIC) algorithm for different scenarios to direction of arrival (DOA) estimation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Coupling effect of hole enlargement and diffusion in the grouting process in a weak stratum based on analytical research
Autorzy:: Zhao, Zenghui
Meng, Zhe
Li, Longfei
Li, Canlin
Yang, Peng
Tematy:: weak stratum
shielding
grouting
reaming diffusion
coupling mechanical effect; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/62644997.pdf Link otwiera się w nowym oknie
Opis:: According to the tail grouting of a double shield TBM tunnel in a soft stratum, the spherical hole model with small and large diﬀusion radius were established respectively considering the slurry diﬀusion and slurry displacement eﬀect in the grouting compaction stage. An- alytical solutions of the spherical hole expansion stress and displacement ﬁeld under the hole expansion-diﬀusion coupling eﬀect are deduced. The interaction among plastic zone radius, reaming radius, initial radius of the spherical hole, and the seepage radius were analyzed. The results show that the larger the seepage pressure of grouting, the smaller the plastic radius. The larger the reaming radius is, the larger the plastic zone radius is. When the reaming radius reaches a certain value, the plastic radius tends to be stable, and the smaller the grouting seepage pressure, the earlier it tends to be stable. The above conclusions have important guiding signiﬁcance for optimizing grouting parameters in weak strata.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Special size effects in advanced single-gate and multiple-gate SOI transistors
Autorzy:: Ohata, A.
Ritzenthaler, R.
Faynot, O.
Cristoloveanu, S.
Tematy:: MOSFET
SOI
ultra-thin silicon
multiple-gate
mobility
coupling effect
thin gate oxide
gate-induced floating body effect
drain-induced virtual substrate biasing; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/308994.pdf Link otwiera się w nowym oknie
Opis:: State-of-the-art SOI transistors require a very small body. This paper examines the effects of body thinning and thin-gate oxide in SOI MOSFETs on their electrical characteristics. In particular, the influence of film thickness on the interface coupling and carrier mobility is discussed. Due to coupling, the separation between the front and back channels is difficult in ultra-thin SOI MOSFETs. The implementation of the front-gate split C-V method and its limitations for determining the front- and back-channel mobility are described. The mobility in the front channel is smaller than that in the back channel due to additional Coulomb scattering. We also discuss the 3D coupling effects that occur in FinFETs with triple-gate and omega-gate configurations. In low-doped or tall fins the corner effect is suppressed. Narrow devices are virtually immune to substrate effects due to a strong lateral coupling between the two lateral sides of the gate. Short-channel effects are drastically reduced when the lateral coupling screens the drain influence.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Environment friendly polymeric materials - identification of their biodegradability on base of thermomechanical coupling phenomenon
Polimery przyjazne środowisku - identyfikacja ich biodegradawalności na podstawie efektów sprzężeń termomechanicznych
Autorzy:: Pieczyska, E. A.
Gadaj, S. P.
Nowacki, W. K.
Tematy:: biodegradable polymers
tension test
mechanical characteristics
thermo-mechanical coupling
thermoelastic effect; Pokaż więcej
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:: https://bibliotekanauki.pl/articles/281866.pdf Link otwiera się w nowym oknie
Opis:: Environment friendly polymeric materials were investigated using an infrared camera in order to identify the relationship between their structure and properties including biodegradability. The experimental technique, based on the thermomechanical coupling phenomenon, was applied to investigation of polymers. Three samples of biodegradable polymers, i.e. the reference one and the modified two, were subjected to tensile and relaxation tests, according to a special program. The temperature changes were measured by a contact less method and related to mechanical characteristics. In the modified material, the temperature decrease, related to the thermoelastic effect, was observed in almost the whole range of the tensile tests. It means that the deformation does not exceed the limit of elasticity, and next, highelasticity - the stage of polymer deformation that follows the elasticity. The temperature measurements seem to be a useful tool for the investigation of biodegradable polymers: thermal characteristics may define a material according to its fragility related to biodegrability.
W pracy badano charakterystyki mechaniczne oraz efekty sprzężeń termomechanicznych w biodegradawalnych polimerach. Trzy rodzaje próbek polimeru, tzn. materiał odniesienia oraz modyfikowany w kierunku podwyższonej biodegradawalności, poddano badaniom rozciągania oraz badaniom relaksacyjnym. Temperaturę deformowanych próbek mierzono w sposób bezstykowy za pomocą kamery termowizyjnej. Stwierdzono, że odkształceniu materiału modyfikowanego aż do zerwania towarzyszy spadek temperatury zwany efektem termosprężystym. Oznacza to, że deformacja nie przekracza zakresu sprężystego i tzw. wysokoelastycznego, nieliniowego chociaż odwracalnego etapu występującego w procesie odkształcania polimerów. Pomiar temperatury może być przydatny do badań tych polimerów - charakterystyki temperaturowe pozwalają zidentyfikować kruchość materiału związaną z jego biodegradawalnością.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Research on the characteristics of the PEP coupling into a metallic via and stub interconnect
Autorzy:: Xiaofei, X.
Denghua, L.
Shuhui, Y.
Tematy:: powerful electromagnetic pulse (PEP)
metallic via
stub interconnect
coupling characteristics
electromagnetic effect; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/140745.pdf Link otwiera się w nowym oknie
Opis:: The research on the coupling electromagnetic effect was studied in this paper, in consideration of the wreaking damage of the powerful electromagnetic pulse to the electronic products. The characteristic of the metallic via and stub interconnect with the coupling voltage was calculated by the model, which was the transfer function F( f ) of the protection circuit parameters of DC power source. The research showed that: the smaller radius of Metallic via, the lower amplitude of F( f ), the less energy of a power electro- magnetic pulse (PEP); the higher increase of the width of the stub interconnect, the bigger reduction of the characteristic impedance of plane wave coupling, the depth of the notch band significantly narrowed. The simulations and experiments were done to compare the protection effects of protection circuits with different parameters at last. The results showed that the protection circuit designed could be highly advantageous in protecting the DC power source in this article.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Consideration of the spatial orientation of magnetic field quantities and tensile mechanical stress in the Finite Element Analysis of electrical machines
Autorzy:: Schauerte, Benedict
Xiao, Xiao
Jansen, Kevin
Hameyer, Kay
Tematy:: magnetic measurements
magneto-mechanical coupling
vector hysteresis
non-oriented electrical steel
Villari effect; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2172800.pdf Link otwiera się w nowym oknie
Opis:: Due to speed-dependent centrifugal forces, the support of the torque, static mechanical stress introduced by manufacturing processes the laminated core of rotating electrical machines is exposed to considerable mechanical stress. The resulting stress distribution changes the magnetic properties of the electrical steel. To take this into account, a magnetization model is constituted on the basis of vector magneto-mechanical measurements that include the magnetic permeability as a function of the mechanical stress and the angle between magnetization - and the maximum principal stress direction. Subsequently, the model is integrated into the finite element simulation of a permanent magnet excited synchronous machine at different rotational speeds.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The ups and downs of Feher-style ENDOR
Autorzy:: Gurbiel, Ryszard
Doan, P. E.
Hoffman, B. M.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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