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Journal articles on the topic 'Generating poles'
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1
Zeng, Xian Tao, and Qian Hua Ren. "Power Generation System by Vehicle on the Downhill of Expressway." Advanced Materials Research 724-725 (August 2013): 1361–65. http://dx.doi.org/10.4028/www.scientific.net/amr.724-725.1361.
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In this paper, a method of magnetoelectricity power generation system for vehicle on the downhill of expressways is proposed. This system is a clean energy system that can be reused. Its structure includes car magnetic poles, magnetic poles imbedded in road surface, closed circuit imbedded in road surface, rectifier, inverter and storage battery. Multi-unit magnetic poles and closed circuits imbedded in the road surface are used in this invention, so when the car poles move with the running down of cars on downhill, magnetic flow in closed circuits will change to produce a technique of group control power generation. From the simulated system in the test, it can be seen that it is efficient and effective in generating power.
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Li, Xin, Tao Che, Xinwu Li, Lei Wang, Anmin Duan, Donghui Shangguan, Xiaoduo Pan, Miao Fang, and Qing Bao. "CASEarth Poles: Big Data for the Three Poles." Bulletin of the American Meteorological Society 101, no. 9 (September 1, 2020): E1475—E1491. http://dx.doi.org/10.1175/bams-d-19-0280.1.
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Abstract Unprecedented changes in the climate and environment have been observed in the three poles, including the North Pole, the South Pole, and the Third Pole–Tibetan Plateau. Although considerable data have been collected and several observation networks have been built in these polar regions, the three poles are relatively data-scarce regions due to inaccessible data acquisition, high-cost labor, and difficult living environments. To address the obstacles to better understanding the unprecedented changes in the three poles and their effects on the global environment and humans, there is a pressing need for better data acquisition, curation, integration, service, and application to support fundamental scientific research and sustainable development for the three poles. CASEarth Poles, a project within the framework of the “CAS Big Earth Data Science Engineering” program of the Chinese Academy of Sciences, aims to construct a big data platform for the three poles. CASEarth Poles will be devoted to 1) breaking the bottleneck of polar data curation, integration, and sharing; 2) developing high-resolution remote sensing products over the three poles; 3) generating atmospheric reanalysis datasets for the polar regions; 4) exploring the synchronization, asynchronization, and teleconnection of the environmental changes in the three poles; 5) investigating the climate, water cycle, and ecosystem dynamics and the interactions among the multispheres in the polar regions and their global effects; and 6) supporting decision-making with regard to sea ice forecasting, infrastructure, and sustainable development in polar regions. CASEarth Poles will collaborate with international efforts to enable better data and information services for the three poles in the big data era.
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Cohen, J. W. "Analysis of the asymmetrical shortest two-server queueing model." Journal of Applied Mathematics and Stochastic Analysis 11, no. 2 (January 1, 1998): 115–62. http://dx.doi.org/10.1155/s1048953398000112.
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This study presents the analytic solution for an asymmetrical two-server queueing model for arriving customers joining the shorter queue for the case of Poisson arrivals and negative exponentially distributed service times. The bivariate generating function of the stationary joint distribution of the queue lengths is explicitly determined.The determination of this bivariate generating function requires a construction of four generating functions. It is shown that each of these functions is the sum of a polynomial and a meromorphic function. The poles and residues at the poles of the meromorphic functions can be simply calculated recursively; the coefficients of the polynomials are easily found, in particular, if the asymmetry in the model parameters is not excessively large. The starting point for the asymptotic analysis for the queue lengths is obtained. The approach developed in the present study is applicable to a larger class of random walks modeling asymmetrical two-dimensional queueing processes.
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KHARE, NELOY. "Influence of solar activity on climate : Poles to Tropics." MAUSAM 62, no. 4 (December 16, 2021): 653–58. http://dx.doi.org/10.54302/mausam.v62i4.390.
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Solar activities are directly or indirectly responsible for climate variability around the globe. Evidences of such correspondences between solar activities and palaeoclimatic proxy data have been reported from polar as well as tropical regions, suggesting solar influence over climate dynamics. However, these findings need to be further strengthened by covering vast geographical region for generating palaeoclimatic data and corresponding variations in solar activities. A better time control on proxy data is essential to arrive at conclusive understanding and plausible causal linkages between solar activity and climate changes from poles to tropics.
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Corcino, Cristina Bordaje. "Asymptotic Approximations of Apostol-Genocchi Numbers and Polynomials." European Journal of Pure and Applied Mathematics 14, no. 3 (August 5, 2021): 666–84. http://dx.doi.org/10.29020/nybg.ejpam.v14i3.3976.
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Asymptotic approximations of the Apostol-Genocchi numbers andpolynomials are derived using Fourier series and ordering of poles ofthe generating function. Asymptotic formulas for the Apostol-Eulernumbers and polynomials are obtained as consequence. Asymptoticformulas for special cases which include the Genocchi numbers andpolynomials are also explicitly stated.
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Grabner, Peter J., and Bertran Steinsky. "Asymptotic behaviour of the poles of a special generating function for acyclic digraphs." Aequationes mathematicae 70, no. 3 (December 2005): 268–78. http://dx.doi.org/10.1007/s00010-005-2806-6.
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Manojlović, Nenad, and Igor Salom. "Algebraic Bethe Ansatz for the Trigonometric sℓ(2) Gaudin Model with Triangular Boundary." Symmetry 12, no. 3 (March 1, 2020): 352. http://dx.doi.org/10.3390/sym12030352.
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In this paper we deal with the trigonometric Gaudin model, generalized using a nontrivial triangular reflection matrix (corresponding to non-periodic boundary conditions in the case of anisotropic XXZ Heisenberg spin-chain). In order to obtain the generating function of the Gaudin Hamiltonians with boundary terms we follow an approach based on Sklyanin’s derivation in the periodic case. Once we have the generating function, we obtain the corresponding Gaudin Hamiltonians with boundary terms by taking its residues at the poles. As the main result, we find the generic form of the Bethe vectors such that the off-shell action of the generating function becomes exceedingly compact and simple. In this way—by obtaining Bethe equations and the spectrum of the generating function—we fully implement the algebraic Bethe ansatz for the generalized trigonometric Gaudin model.
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Hoyt, M. A., L. He, K. K. Loo, and W. S. Saunders. "Two Saccharomyces cerevisiae kinesin-related gene products required for mitotic spindle assembly." Journal of Cell Biology 118, no. 1 (July 1, 1992): 109–20. http://dx.doi.org/10.1083/jcb.118.1.109.
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Two Saccharomyces cerevisiae genes, CIN8 and KIP1 (a.k.a. CIN9), were identified by their requirement for normal chromosome segregation. Both genes encode polypeptides related to the heavy chain of the microtubule-based force-generating enzyme kinesin. Cin8p was found to be required for pole separation during mitotic spindle assembly at 37 degrees C, although overproduced Kip1p could substitute. At lower temperatures, the activity of at least one of these proteins was required for cell viability, indicating that they perform an essential but redundant function. Cin8p was observed to be a component of the mitotic spindle, colocalizing with the microtubules that lie between the poles. Taken together, these findings suggest that these proteins interact with spindle microtubules to produce an outwardly directed force acting upon the poles.
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Price, Kari L., and Lesilee S. Rose. "LET-99 functions in the astral furrowing pathway, where it is required for myosin enrichment in the contractile ring." Molecular Biology of the Cell 28, no. 18 (September 2017): 2360–73. http://dx.doi.org/10.1091/mbc.e16-12-0874.
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The anaphase spindle determines the position of the cytokinesis furrow, such that the contractile ring assembles in an equatorial zone between the two spindle poles. Contractile ring formation is mediated by RhoA activation at the equator by the centralspindlin complex and midzone microtubules. Astral microtubules also inhibit RhoA accumulation at the poles. In the Caenorhabditis elegans one-cell embryo, the astral microtubule–dependent pathway requires anillin, NOP-1, and LET-99. LET-99 is well characterized for generating the asymmetric cortical localization of the Gα-dependent force-generating complex that positions the spindle during asymmetric division. However, whether the role of LET-99 in cytokinesis is specific to asymmetric division and whether it acts through Gα to promote furrowing are unclear. Here we show that LET-99 contributes to furrowing in both asymmetrically and symmetrically dividing cells, independent of its function in spindle positioning and Gα regulation. LET-99 acts in a pathway parallel to anillin and is required for myosin enrichment into the contractile ring. These and other results suggest a positive feedback model in which LET-99 localizes to the presumptive cleavage furrow in response to the spindle and myosin. Once positioned there, LET-99 enhances myosin accumulation to promote furrowing in both symmetrically and asymmetrically dividing cells.
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Butler, Ronald W. "Asymptotic expansions and saddlepoint approximations using the analytic continuation of moment generating functions." Journal of Applied Probability 56, no. 01 (March 2019): 307–38. http://dx.doi.org/10.1017/jpr.2019.19.
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AbstractTransform inversions, in which density and survival functions are computed from their associated moment generating function $\mathcal{M}$, have largely been based on methods which use values of $\mathcal{M}$ in its convergence region. Prominent among such methods are saddlepoint approximations and Fourier-series inversion methods, including the fast Fourier transform. In this paper we propose inversion methods which make use of values for $\mathcal{M}$ which lie outside of its convergence region and in its analytic continuation. We focus on the simplest and perhaps richest setting for applications in which $\mathcal{M}$ is either a meromorphic function in its analytic continuation, so that all of its singularities are poles, or else the singularities are isolated essential. Asymptotic expansions of finite- and infinite-orders are developed for density and survival functions using the poles of $\mathcal{M}$ in its analytic continuation. For finite-order expansions, the expansion error is a contour integral in the analytic continuation, which we approximate using the saddlepoint method based on following the path of steepest descent. Such saddlepoint error approximations accurately determine expansion errors and, thus, provide the means for determining the order of the expansion needed to achieve some preset accuracy. They also provide an additive correction term which increases accuracy of the expansion. Further accuracy is achieved by computing the expansion errors numerically using a contour path which ultimately tracks the steepest descent direction. Important applications include Wilks’ likelihood ratio test in MANOVA, compound distributions, and the Sparre Andersen and Cramér–Lundberg ruin models.
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Zhou, Da, Yan Xiao, and Yang-Hui He. "Seiberg duality, quiver gauge theories, and Ihara’s zeta function." International Journal of Modern Physics A 30, no. 18n19 (July 8, 2015): 1550118. http://dx.doi.org/10.1142/s0217751x15501183.
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We study Ihara’s zeta function for graphs in the context of quivers arising from gauge theories, especially under Seiberg duality transformations. The distribution of poles is studied as we proceed along the duality tree, in light of the weak and strong graph versions of the Riemann Hypothesis. As a by-product, we find a refined version of Ihara’s zeta function to be the generating function for the generic superpotential of the gauge theory.
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Herudziński, Tomasz, and Piotr Swacha. "Poles Towards Energy Transformation and Energy Sources – Sociological Perspective." Przegląd Politologiczny, no. 3 (October 27, 2022): 81–93. http://dx.doi.org/10.14746/pp.2022.27.3.7.
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The article presents the results of research on the issues of Poland’s energy transformation from a sociological perspective. The exploratory analysis covered the attitude of the Polish society to the energy transformation, i.e. a change in the methods of generating energy in Poland, which results from the climate policy adopted by the Polish government.1 The aim of the article is to present social awareness – the social expectations and perceptions of Poles regarding the energy transformation understood in this way – to determine whether the opinions and views of the Polish society are in line with the planned and implemented energy transformation processes. The article provides an answer to the question about the Polish society’s attitudes towards the energy transformation and energy sources – to what extent the attitudes towards the proposed solutions to the problems are positive, and to what extent negative. For this purpose, the method of analysing the existing statistical data was used The basis of the secondary data analysis are the results of public opinion polls, carried out by the Public Opinion Research Centre (CBOS) in the period from 19872 to 2021. The sociological perspective adopted here assumes that the energy transformation is not only an economic but also a social process. For this reason, public support, in particular the positive attitude of respondents to new energy sources, is considered an important element of its success.
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CHAU, L. L., J. C. SHAW, and H. C. YEN. "A GENERALIZED BÄCKLUND TRANSFORMATION FOR THE (SUPER SYMMETRIC) SELF-DUAL YANG-MILLS FIELDS." International Journal of Modern Physics A 04, no. 11 (July 10, 1989): 2715–31. http://dx.doi.org/10.1142/s0217751x89001047.
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We derive a Bäcklund transformation for the self-dual Yang-Mills fields by using the method of special Riemann problem with one zero, in which the moving poles in the complex parameter plane are incorporated. This BT is more general than a previously given one and is capable of generating in one step monopole or instanton solutions from a vacuum solution. We further extend this result to the case of the supersymmetric self-dual Yang-Mills fields.
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Rüdiger, G., M. Küker, P. J. Käpylä, and K. G. Strassmeier. "Antisolar differential rotation of slowly rotating cool stars." Astronomy & Astrophysics 630 (September 30, 2019): A109. http://dx.doi.org/10.1051/0004-6361/201935280.
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Rotating stellar convection transports angular momentum towards the equator, generating the characteristic equatorial acceleration of the solar rotation while the radial flux of angular momentum is always inwards. New numerical box simulations for the meridional cross-correlation ⟨uθuϕ⟩, however, reveal the angular momentum transport towards the poles for slow rotation and towards the equator for fast rotation. The explanation is that for slow rotation a negative radial gradient of the angular velocity always appears, which in combination with a so-far neglected rotation-induced off-diagonal eddy viscosity term ν⊥ provides “antisolar rotation” laws with a decelerated equator. Similarly, the simulations provided positive values for the rotation-induced correlation ⟨uruθ⟩, which is relevant for the resulting latitudinal temperature profiles (cool or warm poles) for slow rotation and negative values for fast rotation. Observations of the differential rotation of slowly rotating stars will therefore lead to a better understanding of the actual stress-strain relation, the heat transport, and the underlying model of the rotating convection.
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Maseleno, Andino, Wahidah Hashim, Alicia Y. C. Tang, Moamin A. Mahmoud, and Marini Othman. "A Brief Understanding on Smart Grid Technology." Journal of Computational and Theoretical Nanoscience 17, no. 6 (June 1, 2020): 2866–68. http://dx.doi.org/10.1166/jctn.2020.9311.
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Environmental destruction that is marked by high CO2 level or greenhouse gas emissions due to excessive use of fossil fuels is a serious challenge that must be minimized immediately. One of the most prominent impact is the destruction of natural ecosystems such as forest fires due to very high temperature, rising sea level, flash flood, melting of iceberg in the north and south poles and uncertain natural climates. From the energy sector that contribute most to global warming is the power generation sector. Currently there are still many power plants that use fossil fuels such as petroleum and coal as the main source of turbine drive in generating electrical energy. The burning results certainly produce CO2 gas that contributes to increase levels of global warming. In response to the crucial issue, developed countries make an effort to reduce the impact of greenhouse gases by conducting research and utilization of renewable energy as an environmentally friendly source of energy such as wind energy and solar energy. Renewable energy is capable of generating electrical energy without generating and increasing greenhouse gases. Current renewable energy utilization trends continue to increase which contributes to the birth of the smart grid concept. So the introduction of smart grid technology is a necessity to reduce the impact of global warming while encouraging efficiency, reliability and effective governance in the supply of electrical energy.
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Simson, J. A., J. L. Condon, L. Chao, and J. Chao. "Comparison of the distribution of tissue kallikrein and esterase A, a kallikrein-like enzyme, in rat kidney using specific monoclonal antibodies." Journal of Histochemistry & Cytochemistry 36, no. 10 (October 1988): 1251–54. http://dx.doi.org/10.1177/36.10.3418106.
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Tissue kallikrein (E.C. 3.4.21.35) and arginine esterase A, another closely related, kinin-generating serine protease, have been localized by immunocytochemistry in rat kidney, using monoclonal antibodies that do not crossreact with other kallikrein-related enzymes or with tonin. Kallikrein was present primarily in the apical cytoplasm of the connecting tubule and the cortical collecting duct. Esterase A, on the other hand, was present primarily in the basolateral region of both proximal and distal straight tubules in the outer medulla and medullary rays. In addition, esterase A was demonstrable in distal convoluted tubules and, to a lesser extent, in proximal convoluted tubules. The presence of different kinin-generating enzymes at these sites would permit the formation of kinins from appropriate substrates on both the vascular and luminal poles of separate segments of the kidney tubule.
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Mikhaylov, A. S., T. Yu Kuznetsova, and I. Yu Peker. "Typology of regions by functional role in Russian innovation space." Regional'nye issledovaniya, no. 4 (2019): 46–57. http://dx.doi.org/10.5922/1994-5280-2019-4-4.
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The article is devoted to studying the spatial heterogeneity of innovation space across Russia while assessing the regional divergence and concentration of knowledge-generating centers. The preliminary hypothesis suggests there are three types of regions: growth poles - the largest cities and agglomerations that generate a significant amount of new knowledge of wide specialization spectrum; zones of influence - territories with high generative potential in one or several specific knowledge domains; and innovation peripheries that demonstrate weak ability to generate new knowledge. The analysis of an array of indicators on publication activity over 2013-2017 across the regions of the Russian Federation using the method of spatial scientometrics has clarified and detailed the initial typology of regions according to their generative function in the interregional innovation process. The study showed the importance of a complex of metropolitan, coastal and border factors affecting the innovative potential of territories. For coastal regions, incl. having a cross-border position, a higher level of research productivity and integration into international S&T cooperation is characteristic, as well as a general positive dynamics of new knowledge generation if found. In addition, the coastal factor determines the specificity of the subject area of the intellectual capital created and the knowledge base accumulated in the region.
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Nan, Beiyan, Jigar N. Bandaria, Kathy Y. Guo, Xue Fan, Amirpasha Moghtaderi, Ahmet Yildiz, and David R. Zusman. "The polarity of myxobacterial gliding is regulated by direct interactions between the gliding motors and the Ras homolog MglA." Proceedings of the National Academy of Sciences 112, no. 2 (December 30, 2014): E186—E193. http://dx.doi.org/10.1073/pnas.1421073112.
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Gliding motility in Myxococcus xanthus is powered by flagella stator homologs that move in helical trajectories using proton motive force. The Frz chemosensory pathway regulates the cell polarity axis through MglA, a Ras family GTPase; however, little is known about how MglA establishes the polarity of gliding, because the gliding motors move simultaneously in opposite directions. Here we examined the localization and dynamics of MglA and gliding motors in high spatial and time resolution. We determined that MglA localizes not only at the cell poles, but also along the cell bodies, forming a decreasing concentration gradient toward the lagging cell pole. MglA directly interacts with the motor protein AglR, and the spatial distribution of AglR reversals is positively correlated with the MglA gradient. Thus, the motors moving toward lagging cell poles are less likely to reverse, generating stronger forward propulsion. MglB, the GTPase-activating protein of MglA, regulates motor reversal by maintaining the MglA gradient. Our results suggest a mechanism whereby bacteria use Ras family proteins to modulate cellular polarity.
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Khuda, Sefat-e., Mikoto Yoshida, Yan Xing, Tatsuya Shimasaki, Motohiro Takeya, Kazuhiko Kuwahara, and Nobuo Sakaguchi. "TheSac3Homologueshd1Is Involved in Mitotic Progression in Mammalian Cells." Journal of Biological Chemistry 279, no. 44 (August 18, 2004): 46182–90. http://dx.doi.org/10.1074/jbc.m405347200.
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SaccharomycesSac3 required for actin assembly was shown to be involved in DNA replication. Here, we studied the function of a mammalian homologue SHD1 in cell cycle progression. SHD1 is localized on centrosomes at interphase and at spindle poles and mitotic spindles, similar to α-tubulin, at M phase. RNA interference suppression of endogenousshd1caused defects in centrosome duplication and spindle formation displaying cells with a single apparent centrosome and down-regulated Mad2 expression, generating increased micronuclei. Conversely, increased expression of SHD1 by DNA transfection withshd1-green fluorescent protein (gfp) vector for a fusion protein of SHD1 and GFP caused abnormalities in centrosome duplication displaying cells with multiple centrosomes and deregulated spindle assembly with up-regulated Mad2 expression until anaphase, generating polyploidy cells. These results demonstrated thatshd1is involved in cell cycle progression, in particular centrosome duplication and a spindle assembly checkpoint function.
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FACHIN, STEFANO, and GEORGE LEIBBRANDT. "TECHNIQUE FOR DERIVING FEYNMAN INTEGRALS IN AXIAL-TYPE GAUGES." International Journal of Modern Physics A 10, no. 19 (July 30, 1995): 2747–67. http://dx.doi.org/10.1142/s0217751x95001297.
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Employing the [Formula: see text] prescription for axial-type gauges, and working in the unified-gauge formalism defined by nμ and the null vector Fμ, we develop a simple technique for evaluating higher-rank integrals from known lower-rank integrals. Based on partial differentiation and implementation of an auxiliary constraint condition, the technique is applicable to a wide variety of integrals containing either single, double or triple spurious poles. We illustrate our procedure with several examples. There are strong indications that the new technique is also capable of generating the finite parts of axial-type integrals.
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Davies, Jamie. "The Justice and Deliverance of God: Integrating Forensic and Cosmological in the ‘Apocalyptic Paul’." Currents in Biblical Research 21, no. 1 (October 2022): 338–48. http://dx.doi.org/10.1177/1476993x221127257.
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Recent ‘apocalyptic’ interpretations of Paul often highlight a distinction between ‘forensic’ and ‘cosmological’ varieties of apocalyptic eschatology. This essay surveys this phenomenon against the backdrop of the Bultmann/Käsemann debate. Various scholars have attempted to resolve the tension between these two poles, whether through circumscribing the forensic by the cosmological, or vice-versa, generating a spectrum of approaches within which this question is generally framed as a zero-sum game. This essay outlines a ‘non-competitive’ construal of this duality and examines a selection of integrative approaches in recent theological interpretation that allows for both forensic and cosmological aspects of Paul’s apocalyptic thought.
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Watanabe, Humihiko. "Twisted cohomology of the complement of theta divisors in an abelian surface." International Journal of Mathematics 27, no. 06 (June 2016): 1650049. http://dx.doi.org/10.1142/s0129167x1650049x.
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Let [Formula: see text] be an abelian surface, and [Formula: see text] be the sum of [Formula: see text] distinct theta divisors having normal crossings. We set [Formula: see text]. We study the structure of the nonvanishing twisted cohomology group [Formula: see text], where [Formula: see text] denotes a locally constant sheaf over [Formula: see text] defined by a multiplicative meromorphic function on [Formula: see text] infinitely ramified just along the divisor [Formula: see text] (as will be seen below, we will take as such a function a product of complex powers of theta functions). The de Rham complex on [Formula: see text] with logarithmic poles along [Formula: see text], associated to the twisted cohomology groups [Formula: see text], is [Formula: see text]-valued, where [Formula: see text] denotes a topologically trivial (i.e. Chern class zero) line bundle over [Formula: see text] determined by the locally constant sheaf [Formula: see text]. Therefore the main results of this paper, which give us information on the order of poles of meromorphic 2-forms on [Formula: see text] generating the cohomology group [Formula: see text], are divided into Theorems 4.5 and 4.6, according as the de Rham complex on [Formula: see text] with logarithmic poles along [Formula: see text] takes the values in a holomorphically nontrivial line bundle [Formula: see text] or a holomorphically trivial one [Formula: see text] ([Formula: see text] denoting the holomorphically trivial line bundle [Formula: see text]). Such a phenomenon does not occur in the case of the twisted cohomology of complex projective space with hyperplane arrangement.
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Johnson, Martin H., and Bernard Maro. "A dissection of the mechanisms generating and stabilizing polarity in mouse 8- and 16-cell blastomeres: the role of cytoskeletal elements." Development 90, no. 1 (December 1, 1985): 311–34. http://dx.doi.org/10.1242/dev.90.1.311.
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Pairs of 8-cell or 16-cell blastomeres were cultured for up to 9h after their formation from isolated 1/4 or 1/8 blastomeres respectively. Blastomeres were examined for the incidence and orientation of their surface polarity, as assessed by binding of FITC-Con A and by distribution of microvilli, and of their cytoplasmic polarity, as assessed by distribution of cytoplasmic actin, clathrin and a 100kD antigen associated with the lysosomal/acid vesicle fraction of membranous organelles. The effect on polarity of incubating the pairs of cells in taxol, nocodazole, cytochalasin D or in a combination of nocodazole plus cytochalasin D for different parts of the incubation period was examined. Neither the development nor the stability of the surface polarity in 8-cell blastomeres was blocked by any treatment and only the use of CCD in combination with nocodazole affected the incidence of surface polarity appreciably. However, with some treatments, the form and position of the surface poles were modified. In the presence of micro tubule inhibitors surface poles extended over a larger area of the cell surface, while exposure to CCD led to poles that were not opposite to the contact point between cells. In contrast to surface polarity, the development of cytoplasmic polarity was suppressed by both micro tubule- and microfilament-inhibiting drugs, which also reversed it rapidly. In polar 16-cell blastomeres surface polarity was influenced in a similar manner to that of 8-cell blastomeres, only the combined use of cytochalasin D and nocodazole having any major effect. Polarization of clathrin in polar 16-cell blastomeres was inhibited almost completely by all drug treatments applied including cytochalasin D. The focal concentration of lysosomal antigen that occurs during the 16-cell stage was reduced only in the continuous presence of nocodazole plus cytochalasin D, but once established was not reversed appreciably by any drug. However, the localization of the lysosomal antigen to the basal region of polarized cells did not seem to occur in the presence of any drug. The dissociation of surface and cytoplasmic polarity revealed in these experiments leads us to conclude that either (1) surface polarity is a prerequisite for the organization of cytoplasmic polarity, and mediates the latter via the cytoskeleton, or (2) surface and cytoplasmic polarity develop by parallel but separate mechanisms.
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Wachowska, Małgorzata. "The contribution of Polish technical thought to the quality of life in developed countries." Ekonomia 23, no. 4 (May 23, 2018): 139–49. http://dx.doi.org/10.19195/2084-4093.23.4.11.
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The contribution of Polish technical thought to the quality of life in developed countriesDue to the fact that technological progress is an important factor influencing the quality of life, the purpose of the paper is to determine what is the contribution — measured by the number of inventions — of mobile Poles to increasing the quality of life of their host countries. The paper considers two fundamental questions: 1 how many inventions, including area of technology, Poles generate for the benefit of countries which they emigrate to and 2 what part of the inventive output of the host countries, including the area of technology, are inventions created by immigrants from Poland.The paper uses the method of quantitative and qualitative analysis of patent applications made in the years 2004–2012 within the frames of international procedure by residents from developed economies of Europe, the United States and Japan a total of 9 countries, which has made it possible to: 1 separate those applications in the case of which the creator of the technical solution is an immigrant from Poland and 2 determine the number of inventions created abroad by Poles for the benefit of their countries of destination.The study involves individuals exceptionally endowed with high human capital who have especially contributed to technological changes occurring in the world, i.e. creators of inventions filed for patent protection within the frames of international procedure — The Patent Cooperation Treaty — who at the time of making the applications lived in the developed countries covered by the study and came from Poland.The analysis of over 1700 PCT patent applications has made it possible to say that in the years 2004–2012: 1 Poles to the largest extent contributed to increasing the quality of life of Americans, for whom they created a total of 828 inventions, then Germans and Britons, whose inventive output they increased by 425 and 143 inventions, respectively, while their contribution to the improvement of the quality of life of the Japanese, Swedes or Finns was very small; 2 Poles to the largest extent contributed to increasing the quality of life of the inhabitants of developed countries by generating inventions in the following areas of technology: a chemistry; metallurgy and b human necessities. Starting from 2009, the creative activity of immigrants from Poland is less and less related to the improvement of the quality of life of the inhabitants of their economies of destination.
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., Sudirmansyah, Joni Arliansyah, and Edi Kadarsa. "Income Generating Study on The South Sumatera LRT Operational." International Journal of Innovative Science and Research Technology 5, no. 7 (July 29, 2020): 556–68. http://dx.doi.org/10.38124/ijisrt20jul446.
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In South Sumatra Palembang, Light Rail Transit (LRT) which is one type of mass transportation has been built. LRT is a rail-based mass transportation facility with electric drive and can be used to carry passengers on a larger scale, but in the implementation of LRT operations require very large operational funds. The generated income from monthly sales ticket was unequal to the costs incurred for LRT operations. In this study, researchers used three options to obtain other income besides ticket sales, which are the income from ad space rent (stations, poles, railroad walls and LRT trains), trade stall rent, and ATM stall rent. The questionnaire survey was conducted on 400 sample companies in Palembang with the aim of getting the company's perception about the willingness to pay (WTP) for renting the advertising space and the ATM stall so that income generation can be predicted from the three options offered to the South Sumatra LRT operations. The analysis conducted in this study was a quantitative analysis with descriptive statistics. From the analysis it was found that the total income that would be received by the manager if all available locations had been occupied or rented were Rp. 10,080,715,996 once a year with the income proportion from advertising rent at 96.25%, income from trade stalls rent 2.08% and income from ATM stalls rent is 1.67%. It is expected that the existing income can help in funding operational in South Sumatra LRT.
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Liu, Mingjie. "Cross-Cultural Misinterpretations in Social Information Processing within British-Chinese Context." Learning & Education 10, no. 7 (June 7, 2022): 155. http://dx.doi.org/10.18282/l-e.v10i7.2988.
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Cross-cultural communication refers to people from different cultural backgrounds interacting with each other for
informative purpose . Based on this understanding,this essay explores the misunderstanding types and mechanisms of formation
in British-Chinese context .Furthermore, this essay takes social information processing theory as analytical lens, discusses two
influential factors and their roles played in generating misunderstandings: cognitive biases and regional cultures. The degree of
influence of regional culture on social information processing leads to different cognitive biases, and the types of misunderstanding
are divided into two extremes: positive misunderstandings and serious offenses; Innocuous misunderstandings are intermediate
between positive misunderstandings and serious offenses, playing a transitional role between the poles.
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Chaika, Victoria, and Boris Kuznetsov. "LEGAL NIHILISM AND LEGAL IDEALISM AS POLES OF MODERN RUSSIAN LEGAL CULTURE." LAW. SAFETY. EMERGENCY SITUATIONS 2024, no. 4 (December 28, 2024): 76–82. https://doi.org/10.61260/2074-1626-2025-2024-4-76-82.
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The article presents two poles of modern legal culture in Russia: legal idealism and legal nihilism. The principle of polarity of value principles in culture is discussed in the prism of F. Nietzsche's views. The antinomy of cultural vectors is manifested in a particular type of national culture – in legal culture, in the form of legal nihilism and legal idealism. Both trends imply value series that reflect real attitudes of civil identity and require attention when formulating national ideology. In the context of the concept of the collective unconscious by C.G. Jung, as well as interpretations by R. Frager and D. Feidiman, collective, legal models of behavior are also part of the unconscious, generating value cultural attitudes, in the context of the presented article, we are talking about legal nihilism and legal idealism. Legal nihilism is a passive, negative attitude towards the law as an instrument for the implementation of civil will, which negatively affects the quality of social life. In the modern history of Russia, the vector of legal nihilism became widespread during the period of social crisis of the late 80s and early 90s. Legal idealism also gives rise to a crisis of faith in legislative bodies of power, since it presupposes ideals that are far from reality. In the prism of the ideas of N.Ya. Danilevsky, K.N. Leontiev, L.N. Gumilev, it is necessary to interpret legal consciousness as a developing system. This perspective of understanding civil life allows us to conclude about the necessity of the existence of vectors of legal idealism and nihilism in a harmonious combination, since this is how dialectical mechanisms of movement into the future are formed.
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Huyett, A., J. Kahana, P. Silver, X. Zeng, and W. S. Saunders. "The Kar3p and Kip2p motors function antagonistically at the spindle poles to influence cytoplasmic microtubule numbers." Journal of Cell Science 111, no. 3 (February 1, 1998): 295–301. http://dx.doi.org/10.1242/jcs.111.3.295.
Full textAbstract:
Microtubules provide the substrate for intracellular trafficking by association with molecular motors of the kinesin and dynein superfamilies. Motor proteins are generally thought to function as force generating units for transport of various cargoes along the microtubule polymer. Recent work suggests additional roles for motor proteins in changing the structure of the microtubule network itself. We report here that in the budding yeast Saccharomyces cerevisiae microtubule motors have antagonistic effects on microtubule numbers and lengths. As shown previously, loss of the Kar3p motor stimulates cytoplasmic microtubule growth while loss of Kip2p leads to a sharp reduction in cytoplasmic microtubule numbers. Loss of both the Kip2p and Kar3p motors together in the same cell produces an intermediate phenotype, suggesting that these two motors act in opposition to control cytoplasmic microtubule density. A Kip2p-GFP fusion from single gene expression is most concentrated at the spindle poles, as shown previously for an epitope tagged Kar3p-HA, suggesting both of these motors act from the minus ends of the microtubules to influence microtubule numbers.
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Ali, Mubarak, I.-Nan Lin, and Chien-Jui Yeh. "Predictor Packing in Developing Unprecedented Shaped Colloidal Particles." Nano 13, no. 09 (September 2018): 1850109. http://dx.doi.org/10.1142/s1793292018501096.
Full textAbstract:
Developing anisotropic particles of different shapes has been a hot topic of research since decades as they possess special features not possible to achieve through other means. It is considered challenging to control atoms for developing their particles of certain size and shape. In this study, different shapes of gold particles were developed while employing a pulse-based electron–photon–solution interface process. Gold atoms, when they are in certain transition state, develop their monolayer assembly around the light glow known in argon plasma generating at the bottom of copper capillary known in cathode. The rate of uplifted gold atoms to develop monolayer assembly at solution surface is controlled by electron streams and traveling photons of high-density entering the solution. Gold atoms dissociated from the precursor on transforming photons (propagating through immersed graphite rod known in anode) to heat energy. Double-packets of nanoshape energy are generated under tuned pulse protocol when they are placed over the compact monolayer assembly resulting in tiny-sized particles of own shape. On the separation of joined tiny particles into two equilateral triangular-shaped tiny particles, each atom of their one-dimensional array elongated on both sides from the centre while exerting opposite poles forces of surface format. This results in convertion of each array of atoms into a structure of smooth elements. Due to immersing force of solution surface and their termination at the centre of light glow, tiny-shaped particles pack from different zones where their structures of smooth elements assemble to develop monolayers of developing particle in a certain shape. Developing particles of one-dimension undertake assembling of structures of smooth elements where packing of their tiny-shaped particles is from the near regions belonging to rearward sides of north–south poles at the solution surface, whereas, developing particles of multi-dimension undertake assembling of structures of smooth elements where packing of their tiny-shaped particles is from the regions of east–west poles and near regions of east–west poles on the solution surface. Depending on the number and orientation of assembled structures of smooth elements nucleating monolayers for different particles, their different anisotropic shapes develop. At fixed precursor concentration, increasing the process time results in developing particles of low aspect ratio. Under tuned parameters, particles of unprecedented features developed.
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Seangwong, Pattasad, Supanat Chamchuen, Nuwantha Fernando, Apirat Siritaratiwat, and Pirat Khunkitti. "A Novel Six-Phase V-Shaped Flux-Switching Permanent Magnet Generator for Wind Power Generation." Energies 15, no. 24 (December 18, 2022): 9608. http://dx.doi.org/10.3390/en15249608.
Full textAbstract:
Flux-switching permanent magnet (FSPM) machines have attracted wide attention in many rotating applications that require high-power density. In this research, we propose for the first time a novel six-phase FSPM generator with a stator featuring a V-shaped flux-focusing magnet arrangement. The design is targeted for low-speed wind power generation. To achieve the design objectives as a wind generator, the highly comprehensive structural parameters, including the number of rotor poles, split ratio, and rotor pole width, are designed and optimized using 2D finite-element analysis. From findings, the optimal stator/rotor pole combination is discovered to be 12/19 for the considered power and speed requirements. When compared to the initial structure, the optimized structure of the V-shaped FSPM generator is found to produce a significant improvement in EMF, cogging torque, electromagnetic torque, power, and efficiency. The power-generating performance of the proposed FSPM generator is found to be outstanding when compared to the radial-flux PM generators described in the literature. Therefore, the proposed V-shaped FSPM generator is capable of being used for low-speed wind power generation. The machine configuration adjustment approach presented in this work can also be utilized for the design of permanent magnet wind generators.
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Guerrero, J., H. González, and F. J. García. "Spatial modes of capillary jets, with application to surface stimulation." Journal of Fluid Mechanics 702 (May 16, 2012): 354–77. http://dx.doi.org/10.1017/jfm.2012.182.
Full textAbstract:
AbstractSurface stimulation of any physical origin (electrohydrodynamic, thermocapillary, etc.) has the goal of generating localized perturbations on the free surface or the velocity field of a capillary jet. Among these perturbations, only the axisymmetric ones are determinant for the jet breakup. Often, the stimulation is weak enough for a linear model to be applicable. Then, the stimulation can be described by means of the Green functions for stresses, both normal and tangential to the interface, the calculations of which are, in addition, uncoupled from the hydrodynamic variables. If a harmonic forcing is applied, these Green functions are combinations of the spatial modes whose associated poles lie inside the appropriate integration contour of the complex wavenumber plane. This is the motivation for a comprehensive enumeration and description of the spatial modes, which has not been done up to now. Modes familiar from a temporal analysis, the dominant and subdominant capillary modes and the hydrodynamic modes, are present, along with modes specific to a spatial analysis. Most of the latter have already been mentioned in the literature for inviscid jets, but not analysed. A mode not previously found is reported. In addition, a description of the velocity field associated with each mode is provided, as a tool to understand their physical origin and behaviour. The relative importance of each mode in both normal- and tangential-stress stimulations is discussed. Finally, the well-known merging of poles below a critical jet velocity, leading to absolute instability, is analysed in the light of the modal description.
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Okopińska, Anna. "The Effective Action for Local Composite Operators Φ2(x) and Φ4(x)." International Journal of Modern Physics A 12, no. 03 (January 30, 1997): 585–605. http://dx.doi.org/10.1142/s0217751x97000554.
Full textAbstract:
The generating functionals for the local composite operators, Φ2(x) and Φ4(x), are used to study excitations in the scalar quantum field theory with λ Φ4 interaction. The effective action for the composite operators is obtained as a series in the Planck constant ℏ, and the two- and four-particle propagators are derived. The numerical results are studied in the space–time of one dimension, when the theory is equivalent to the quantum mechanics of an anharmonic oscillator. The effective potential and the poles of the composite propagators are obtained as series in ℏ, with an effective mass and an effective coupling determined by nonperturbative gap equations. This provides a systematic approximation method for the ground state energy, and for the second and fourth excitations. The results show quick convergence to the exact values, better than that obtained without including the operator Φ4(x).
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Casasayas, J., J. Llibre, and A. Nunes. "Periodic orbits of transversal maps." Mathematical Proceedings of the Cambridge Philosophical Society 118, no. 1 (July 1995): 161–81. http://dx.doi.org/10.1017/s0305004100073539.
Full textAbstract:
One of the most useful theorems for proving the existence of fixed points, or more generally, periodic points of a continuous self-map f of a compact manifold, is the Lefschetz fixed point theorem. When studying the periodic points of f it is convenient to use the Lefschetz zeta function Zf(t) of f, which is a generating function for the Lefschetz numbers of all iterates of f. The function Zf(t) is rational in t and can be computed from the homological invariants of f. See Section 2 for a precise definition. Thus there exists a relation, based on the Lefschetz fixed point theorem, between the periodic points of a self-map of a manifold f:M → M and the properties of the induced homomorphism f*i on the homology groups of M. This relation has been used in several papers, namely [F1], [F2], [F3] and [M]. In these papers, sufficient conditions are given for the existence of infinitely many periodic points in the case when all the zeros and poles of the associated Lefschetz zeta function are roots of unit. Here we restrict ourselves to maps defined on manifolds with a certain homology type. For transversal maps f defined on this class of manifolds, it is possible to extend the techniques introduced in [F1], [F3] and [M] in order to obtain information on the set of periods of f. We recover the above mentioned results of J. Franks and T. Matsuoka, and derive new results on the set of periods of f when the associated Lefschetz zeta function has zeros or poles outside the unit circle.
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Chebabhi, Layachi, Toufik Tayeb Naas, Mohamed Zitouni, Ismail Ghibeche, and Tahar Benmessaoud. "Influence of choosing materials on 6/4 switched reluctance motor performance." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 1 (May 31, 2024): 2391–406. http://dx.doi.org/10.54021/seesv5n1-118.
Full textAbstract:
The Switched Reluctance Motor (SRM) is used in many industrial applications that require high torque due to its ability to achieve high and efficient performance, simplicity, low material costs and ease of design. This motor functions on the principle of generating motion by attracting and repulsing magnetic cores. The SRM is characterized by the efficient use of energy in applications that require rapid changes in speed and has a higher resistance to shocks and vibrations. Among the essential factors that affect the performance of the SRM motors are the embrace of poles stator and rotor, dimensions, the size of the motor, the shapes of rotor geometry and the number of stator and rotor poles. This paper aims to study the effect of material selection on improving the SRM performance. First, we created a basic design of the SRM with appropriate characteristics to obtain the best operation conditions of high speed and torque. Then, we applied different materials and compared the obtained results using the ANSYS RMxprt tool. We focused on studying the effect of selecting materials in the rotor and stator parts on the SRM 6/4 performance through the efficiency, total losses, speed and rated torque. After comparing and analyzing the basic results, a two-dimensional model of the SRM was created using the ANSYS Maxwell 2D tool to evaluate the motor’s performance. The analysis includes the curves of torque, speed, current, flux linkages and voltage, in addition to the variation of flux lines and magnetic flux density. The results were analyzed using the finite element method (FEM), which is characterized by speed and accuracy in electromagnetic analysis and various data.
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Jarahizadeh, Sina, and Bahram Salehi. "A Comparative Analysis of UAV Photogrammetric Software Performance for Forest 3D Modeling: A Case Study Using AgiSoft Photoscan, PIX4DMapper, and DJI Terra." Sensors 24, no. 1 (January 3, 2024): 286. http://dx.doi.org/10.3390/s24010286.
Full textAbstract:
Three-dimensional (3D) modeling of trees has many applications in various areas, such as forest and urban planning, forest health monitoring, and carbon sequestration, to name a few. Unmanned Aerial Vehicle (UAV) photogrammetry has recently emerged as a low cost, rapid, and accurate method for 3D modeling of urban and forest trees replacing the costly traditional methods such as plot measurements and surveying. There are numerous commercial and open-source software programs available, each processing UAV data differently to generate forest 3D modeling and photogrammetric products, including point clouds, Digital Surface Models (DSMs), Canopy Height Models (CHMs), and orthophotos in forest areas. The objective of this study is to compare the three widely-used commercial software packages, namely, AgiSoft Photoscan (Metashape) V 1.7.3, PIX4DMapper (Pix4D) V 4.4.12, and DJI Terra V 3.7.6 for processing UAV data over forest areas from three perspectives: point cloud density and reconstruction quality, computational time, DSM assessment for height accuracy (z) and ability of tree detection on DSM. Three datasets, captured by UAVs on the same day at three different flight altitudes, were used in this study. The first, second, and third datasets were collected at altitudes of 60 m, 100 m, and 120 m, respectively over a forested area in Tully, New York. While the first and third datasets were taken horizontally, the second dataset was taken 20 degrees off-nadir to investigate the impact of oblique images. Results show that Pix4D and AgiSoft generate 2.5 times denser point clouds than DJI Terra. However, reconstruction quality evaluation using the Iterative Closest Point method (ICP) shows DJI Terra has fewer gaps in the point cloud and performed better than AgiSoft and Pix4D in generating a point cloud of trees, power lines and poles despite producing a fewer number of points. In other words, the outperformance in key points detection and an improved matching algorithm are key factors in generating improved final products. The computational time comparison demonstrates that the processing time for AgiSoft and DJI Terra is roughly half that of Pix4D. Furthermore, DSM elevation profiles demonstrate that the estimated height variations between the three software range from 0.5 m to 2.5 m. DJI Terra’s estimated heights are generally greater than those of AgiSoft and Pix4D. Furthermore, DJI Terra outperforms AgiSoft and Pix4D for modeling the height contour of trees, buildings, and power lines and poles, followed by AgiSoft and Pix4D. Finally, in terms of the ability of tree detection, DJI Terra outperforms AgiSoft and Pix4D in generating a comprehensive DSM as a result of fewer gaps in the point cloud. Consequently, it stands out as the preferred choice for tree detection applications. The results of this paper can help 3D model users to have confidence in the reliability of the generated 3D models by comprehending the accuracy of the employed software.
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Husidic, Edin, Klaus Scherer, Marian Lazar, Horst Fichtner, and Stefaan Poedts. "Toward a Realistic Evaluation of Transport Coefficients in Non-equilibrium Space Plasmas." Astrophysical Journal 927, no. 2 (March 1, 2022): 159. http://dx.doi.org/10.3847/1538-4357/ac4af4.
Full textAbstract:
Abstract Recent studies have outlined the interest for the evaluation of transport coefficients in space plasmas, where the observed velocity distributions of plasma particles are conditioned not only by the binary collisions, e.g., at low energies, but also by the energization of particles from their interaction with wave turbulence and fluctuations, generating the suprathermal kappa-distributed populations. This paper provides a first estimate of the main transport coefficients based on regularized kappa distributions, which, unlike standard kappa distributions (SKDs), enable macroscopic parameterization without mathematical divergences or physical inconsistencies. All transport coefficients derived here, i.e., the diffusion and mobility coefficients, electric conductivity, thermoelectric coefficient, and thermal conductivity, are finite and well defined for all values of κ > 0. Moreover, for low values of κ (i.e., below the SKD poles), the transport coefficients can be orders of magnitudes higher than the corresponding Maxwellian limits, meaning that significant underestimations can be made if suprathermal electrons are ignored.
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Spasova, Berta, and Hans Heinrich Gatzen. "Simulation of an Improved Microactuator with Discrete MSM Elements." Materials Science Forum 635 (December 2009): 181–86. http://dx.doi.org/10.4028/www.scientific.net/msf.635.181.
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Magnetic Shape Memory (MSM) alloys are a new class of “smart” materials. In the martensite state, they exhibit a reversible strain due to a reorientation of twin variants, based on twin boundary motion driven by an external magnetic field occurring in the martensite state. This effect allows for the development of linear microactuators. This work presents the simulation results for the fabrication of a microactuator based on an MSM alloy with an optimized design. A stator element consists of a NiFe45/55 flux guide, two poles, and double-layer Cu coils wound around each pole for generating the magnetic field. The MSM material applied is NiMnGa. The integrated microactuator is subjected to dynamic simulation, using a “checkerboard” pattern to locally switch the magnetic properties when the relative permeability µr is changed. The model is described with the Ansys Parametric Design Language (APDL). Design, modeling, and simulation of the magnetic system including MSM material, are conducted by Finite Element Method (FEM) analysis using the software tool ANSYS™.
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Abril, Ernesto A., Ernesto M. Abril, Idalia Pacheco, Leonardo M. Abril, and Christian P. Abril. "Heart Rate Analysis Applied to Beginners Electrician Linemen of Energy Distribution Networks Who Ascend and Descend from the Posts." MATEC Web of Conferences 220 (2018): 09001. http://dx.doi.org/10.1051/matecconf/201822009001.
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The investigation uses a group of people: an expert and five inexperienced ones in the ascent to the posts of the electric power distribution networks that are 12 meters high. The analysis consisted in taking data related to the heartbeat given by the physical effort made to raise and lower poles, presenting a map of heat, generating a stress caused by the fear of heights and the possibility of slipping or falling from the structures that they are installing, resulting in a very unstable heart rate. The analysis considers different circumstances, such as the correlation of the increase of the heart rate with the effort made by the worker, and the heart rate that increases with the fear or stress of working at height is determined. Should be considered the cardiac pulse that the worker has when descending from the post. The heart rate is variable in all the people analyzed, after a physical effort the heart rate is unpredictable for several people.
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Rieder, C. L., G. Rupp, S. P. Alexander, and R. B. Nicklas. "Three-dimensional reconstruction studies of mitotic spindle ultrastructure." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 32–33. http://dx.doi.org/10.1017/s0424820100102249.
Full textAbstract:
The mitotic spindle is composed chiefly of microtubules (MTs) and functions to equally distribute the replicated chromosomes to daughter cells. Spindles are generated from an interaction between the spindle poles and kinetochores. The former are responsible for generating spindle MTs while the latter act as sites for attaching the chromosomes to the MTs. As noted by McIntosh the emphasis of most mitotic investigations is structural “because the spindle is a kind of machine, and numerous structural questions are obvious as one tries to understand a device which converts chemical energy into mechanical work.”During the course of our mitosis studies it was frequently necessary to reconstruct the three-dimensional (3D) ultrastructure of spindles from serial sections. To do this we utilized the STERECON system developed at the Albany HVEM facility. Briefly, prints of serial sections are enlarged to an optimum final magnification. For each section, profiles are drawn on clear plastic sheets outlining the chromosomes, mitochondria, and spindle MTs.
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Käpylä, P. J. "Star-in-a-box simulations of fully convective stars." Astronomy & Astrophysics 651 (July 2021): A66. http://dx.doi.org/10.1051/0004-6361/202040049.
Full textAbstract:
Context. Main-sequence late-type stars with masses of less than 0.35 M⊙ are fully convective. Aims. The goal is to study convection, differential rotation, and dynamos as functions of rotation in fully convective stars. Methods. Three-dimensional hydrodynamic and magnetohydrodynamic numerical simulations with a star-in-a-box model, in which a spherical star is immersed inside of a Cartesian cube, are used. The model corresponds to a 0.2 M⊙ main-sequence M5 dwarf. A range of rotation periods (Prot) between 4.3 and 430 d is explored. Results. The slowly rotating model with Prot = 430 days produces anti-solar differential rotation with a slow equator and fast poles, along with predominantly axisymmetric quasi-steady large-scale magnetic fields. For intermediate rotation (Prot = 144 and 43 days) the differential rotation is solar-like (fast equator, slow poles), and the large-scale magnetic fields are mostly axisymmetric and either quasi-stationary or cyclic. The latter occurs in a similar parameter regime as in other numerical studies in spherical shells, and the cycle period is similar to observed cycles in fully convective stars with rotation periods of roughly 100 days. In the rapid rotation regime the differential rotation is weak and the large-scale magnetic fields are increasingly non-axisymmetric with a dominating m = 1 mode. This large-scale non-axisymmetric field also exhibits azimuthal dynamo waves. Conclusions. The results of the star-in-a-box models agree with simulations of partially convective late-type stars in spherical shells in that the transitions in differential rotation and dynamo regimes occur at similar rotational regimes in terms of the Coriolis (inverse Rossby) number. This similarity between partially and fully convective stars suggests that the processes generating differential rotation and large-scale magnetism are insensitive to the geometry of the star.
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Wang, Shusheng, Stephanie A. Ketcham, Arne Schön, Benjamin Goodman, Yueju Wang, John Yates, Ernesto Freire, Trina A. Schroer, and Yixian Zheng. "Nudel/NudE and Lis1 promote dynein and dynactin interaction in the context of spindle morphogenesis." Molecular Biology of the Cell 24, no. 22 (November 15, 2013): 3522–33. http://dx.doi.org/10.1091/mbc.e13-05-0283.
Full textAbstract:
Lis1, Nudel/NudE, and dynactin are regulators of cytoplasmic dynein, a minus end–directed, microtubule (MT)-based motor required for proper spindle assembly and orientation. In vitro studies have shown that dynactin promotes processive movement of dynein on MTs, whereas Lis1 causes dynein to enter a persistent force-generating state (referred to here as dynein stall). Yet how the activities of Lis1, Nudel/NudE, and dynactin are coordinated to regulate dynein remains poorly understood in vivo. Working in Xenopus egg extracts, we show that Nudel/NudE facilitates the binding of Lis1 to dynein, which enhances the recruitment of dynactin to dynein. We further report a novel Lis1-dependent dynein–dynactin interaction that is essential for the organization of mitotic spindle poles. Finally, using assays for MT gliding and spindle assembly, we demonstrate an antagonistic relationship between Lis1 and dynactin that allows dynactin to relieve Lis1-induced dynein stall on MTs. Our findings suggest the interesting possibility that Lis1 and dynactin could alternately engage with dynein to allow the motor to promote spindle assembly.
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Pelliccia, Luca, Fabrizio Cacciamani, Cristiano Tomassoni, and Roberto Sorrentino. "Ultra-compact high-performance filters based on TM dual-mode dielectric-loaded cavities." International Journal of Microwave and Wireless Technologies 6, no. 2 (December 3, 2013): 151–59. http://dx.doi.org/10.1017/s1759078713001001.
Full textAbstract:
Ultra-compact band-pass filters with Nth-order pseudoelliptic response are presented allowing dramatic volume and mass savings (up to about 90%) compared to conventional filters at the price of a modest Q-factor reduction. TM dual-mode cavities loaded with high-permittivity (εr > 30) ceramic cylinders are employed, while non-resonating modes are used to create N transmission zeros symmetrically or non-symmetrically located in the pass-band. A single cavity behaves as a generalized doublet generating two transmission poles and two transmission zeros and is used as a basic building block for N-pole and N-zero filters with symmetric or asymmetric response. To prove the effectiveness of the approach, a very compact fourth-order filter with 4.35 GHz center frequency, four transmission zeros has been designed, fabricated, and tested showing an unloaded Q close to 2000. It is finally shown that the filter response can be shifted in frequency by simply replacing the dielectric material with another having different εr, so that the same metal enclosure can be used to realize various filters operating at different frequency bands.
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Janeczko, Emilia, Jan Banaś, Małgorzata Woźnicka, Krzysztof Janeczko, Katarzyna Utnik-Banaś, Stanisław Zięba, and Jitka Fialova. "How Did COVID-19 Pandemic Stress Affect Poles’ Views on the Role of the Forest?" Land 13, no. 5 (May 11, 2024): 656. http://dx.doi.org/10.3390/land13050656.
Full textAbstract:
The 2020–2021 COVID-19 pandemic has had a tremendous impact on the daily lives of everyone, including local communities and entire societies. Under the influence of this new experience, the importance of the services and benefits provided by forests and other green spaces has increased. A very large role in this aspect was played by media messages promoting the idea of being close to nature as a remedy for malaise and stress, and pushing the thesis that the risk of spreading the virus outdoors is lower than it is indoors. Thanks to media messages, as well as government responses (i.e., lockdown, temporary bans on entering the forest), public attention has been directed toward forests, generating greater interest in forest management and conservation issues, as well as in nature and forestry education. The purpose of our research was to determine how the pandemic affected the frequency of visits to the forest and how it changed the public’s views on the role of forests. The research material consists of the results of a questionnaire survey (online and traditionally way) carried out in Poland from September to October in 2020. A total of 1402 people were surveyed. The results show that nearly 52% of respondents increased their use of forest recreational services during the COVID-19 pandemic. We also found that more than 80% of respondents agreed with statements that the forest is a safer space than, for example, parks or squares, and it is more difficult to contract the virus there. Men were more likely to agree with this statement than women (1.51), respondents without children (1.45), respondents over the age of 31 (1.72), and respondents with more than primary or secondary education (1.37). Also, more than 80% of respondents said that the social functions of the forest (e.g., recreational) had gained importance as a result of the pandemic. The social functions of the forest gained importance primarily among respondents with higher education (2.40), and among respondents who had visited the forest rather infrequently (several times a year) for recreational purposes before the pandemic (1.72). Those with children were more likely to agree with the statement that the economic functions of the forest have lost their importance (1.43), as were those who had formerly visited the forest several times a year (1.53). With regard to the statement “the slowdown of the economy has contributed to the improvement of the environment,” there were no statistically significant differences in the views of respondents in terms of their socio-demographic characteristics.
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Sinenko, Olga. "Tax Incentives for Economic Growth in the Russian Far East: Broad vs. Targeted Stimuli." Emerging Science Journal 8, no. 3 (June 1, 2024): 1153–66. http://dx.doi.org/10.28991/esj-2024-08-03-021.
Full textAbstract:
The purpose of this study is to justify the choice of tax incentive policy instruments aimed at the economic development of the Russian Far East, which is facing acute demographic and environmental problems. To model the dynamics of the region’s real economic system, this study employed a mathematical model based on actual data from 2010 to 2021, covering economic, technological, and socio-ecological aspects. Using the versatile AnyLogic 8.0 platform for agent-based and system dynamics modeling, experiments on alternative tax incentive policy options involving both broad tax incentives and targeted economic development measures were conducted. Specifically, a 50% investment tax deduction for residents in special economic zones in the Russian Far East was implemented. The experimental results show that, despite comparable population dynamics, targeted stimulation of growth poles through public-private partnership programs outperforms broad tax incentives for economic entities in the Russian Far East. This is evident in higher economic growth rates in the region, particularly during the experimental period, except for 2040–2050, where adverse demographic trends constrain growth in both scenarios. The theoretical significance of the application of this method has shown that it allows us to obtain new significant results in the subject area of research due to the consideration of the complex interaction of factors of influence both at the micro- and macro-level, primarily behavioral factors that are fundamentally important for understanding the action of taxes. The practical implications of this study lie in defining the parameters of tax policy to target and stimulate growth poles in regions serving as hubs for generating and disseminating new technologies. The planned perspective is to encourage population growth and ensure sustained economic development in Russia’s Far East. It is advisable to explore comprehensive tax and budgetary regulations that simultaneously address economic, socio-demographic, and environmental issues in the region. Doi: 10.28991/ESJ-2024-08-03-021 Full Text: PDF
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Hoyt, M. A., L. He, L. Totis, and W. S. Saunders. "Loss of function of Saccharomyces cerevisiae kinesin-related CIN8 and KIP1 is suppressed by KAR3 motor domain mutations." Genetics 135, no. 1 (September 1, 1993): 35–44. http://dx.doi.org/10.1093/genetics/135.1.35.
Full textAbstract:
Abstract The kinesin-related products of the CIN8 and KIP1 genes of Saccharomyces cerevisiae redundantly perform an essential function in mitosis. The action of either gene-product is required for an outwardly directed force that acts upon the spindle poles. We have selected mutations that suppress the temperature-sensitivity of a cin8-temperature-sensitive kip1-delta strain. The extragenic suppressors analyzed were all found to be alleles of the KAR3 gene. KAR3 encodes a distinct kinesin-related protein whose action antagonizes Cin8p/Kip1p function. All seven alleles analyzed were altered within the region of KAR3 that encodes the putative force-generating (or "motor") domain. These mutations also suppressed the inviability associated with the cin8-delta kip1-delta genotype, a property not shared by a deletion of KAR3. Other properties of the suppressing alleles revealed that they were not null for function. Six of the seven were unaffected for the essential karyogamy and meiosis properties of KAR3 and the seventh was dominant for the suppressing trait. Our findings suggest that despite an antagonistic relationship between Cin8p/Kip1p and Kar3p, aspects of their mitotic roles may be similar.
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Risso-Pascotto, Claudicéia, Maria Suely Pagliarini, and Cacilda Borges do Valle. "Microsporogenesis in Brachiaria bovonei (Chiov.) Robyns and B. subulifolia (Mez) Clayton (Poaceae)." Scientia Agricola 66, no. 5 (October 2009): 691–96. http://dx.doi.org/10.1590/s0103-90162009000500015.
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Some African species of Brachiaria have been introduced into the Americas and became the most important forage for pastures in the tropics. New cultivars can be obtained either from direct selections from the natural existing variability in the germplasm collections or from interspecific hybridizations. Polyploidy is predominant in the genus Brachiaria and correlated with apomixis which complicates hybridization. The objective of cytological studies underway on the Brachiaria germplasm collection at Embrapa Beef Cattle is to determine the chromosome number and meiotic behavior of accessions. For the breeding of Brachiaria species, compatible sexual and apomictic accessions need to be identified. Microsporogenesis was evaluated in two accessions of Brachiaria bovonei (BO01 and BO05) and one accession of B. subulifolia (SU01). BO01 is pentaploid (2n = 5x = 45), BO05 is tetraploid (2n = 4x = 36), and SU01 is hexaploid (2n = 6x = 54), derived from x = 9. Meiotic abnormalities typical of polyploids, characterized by precocious chromosome migration to the poles in metaphases, laggard chromosomes in anaphases, and micronuclei in telophases and tetrads, were recorded in high frequency in all the accessions generating unbalanced gametes. Both accessions of B. bovonei presented chromosome stickiness. The results are discussed in the view of the Brachiaria breeding program objectives.
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Tekale, Mr Pramod Vilas. "Transmission line Three-Phase Fault Analysis Using Matlab Simulink." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 1139–44. http://dx.doi.org/10.22214/ijraset.2022.45420.
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Abstract: The Electric Power System has many different sections, transmission system is one of. Where power is transmitted from generating stations and substations via transmission lines into consumers. In the Power System causes of faults are many, they include lighting, wind damage, trees falling across transmission lines, vehicles or aircraft colliding with the transmission towers or poles, birds shorting lines. The fault occurring in power system can be broadly classified into symmetrical and unsymmetrical fault. Generally these faults are occurred in the long transmission line system such as single line - ground fault (L-G), double line - ground (2L-G), triple line - ground fault (3LG) and Line - line fault (L-L). The transmission line fault analysis helps to select and develop a better for protection purpose. This paper ways to deal with the MATLAB programming in which transmission line model is composed and different issues has been reenacted utilizing tool compartment. Fault Analysis for different sorts of faults has been done and it impacts are appeared in simulation output, for example, voltage, current, control alongside the positive, negative and zero grouping segments of voltage and current output as far as waveforms.
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Guan, Le, Jia Li Gao, Zhi Wen Wang, Guo Qing Zhang, and Jin Kui Chu. "A Refined Arnoldi Algorithm Based Krylov Subspace Technique for MEMS Model Order Reduction." Key Engineering Materials 503 (February 2012): 260–65. http://dx.doi.org/10.4028/www.scientific.net/kem.503.260.
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A refined approach producing MEMS numerical macromodels is proposed in this paper by generating the iterative Krylov subspace using a refined Arnoldi algorithm, which can reduce the degrees of freedom of the original system equations described by the state space method. Projection of the original system matrix onto the Krylov subspace which is spanned by a refined Arnoldi algorithm is still based on the transfer function moment matching principle. The idea of the iterative version is to expect that a new initial vector will contain more and more information on the required eigenvectors that is called refined vector. The refined approach improves approximation accuracy of the system matrix eigenvalues equivalent to a more accurate approximation to the poles of the system transfer function, obtaining a more accurate reduced-order model. The clamped beam model and the FOM model are reduced order by classical Arnoldi and refined Arnoldi algorithm in numerical experiments. From the computing result it is concluded that the refined Arnoldi algorithm based Krylov subspace technique for MEMS model order reduction has more accuracy and reaches lower order number of reduced order model than the classical Arnoldi process.
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Lachowska, Karolina. "Kogo powinni się bać Polacy? Czyli o konstrukcji wroga w narracjach Zjednoczonej Prawicy." Zeszyty Prasoznawcze 66, no. 4 (256) (December 13, 2023): 65–94. http://dx.doi.org/10.4467/22996362pz.23.039.18673.
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Whom Should Poles Fear? The Construction of an Enemy in the Narrative of the United Right The article’s main objective is to analyse the statements made by politicians from the United Right regarding their methods of arousing social fears and generating an enemy. The starting point is the concept of three levels of fear proposed by Martha Nussbaum: fears arising from actual events that create uncertainty, the displacement of fear onto someone/something unrelated to the actual problem but serving as a convenient substitute (scapegoating), and the employment of the idea of a hidden/imaginary enemy. These three aspects are applied to analysing narratives concerning refugees, Donald Tusk and the LGBT+ community, and “gender ideology”. These narratives align with the concept of “fear management”, understood as a manipulative strategy that aims to eliminate undesirable ideas/groups from the discourse by arousing fears towards specific phenomena and individuals, while positioning those in power as guarantors of security. The research material is also examined through the lens of Niklas Luhmann’s (2009) information selection criteria, whose concepts of social systems and the reality of mass media are adopted as the guiding theory.
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Hird, S. N., and J. G. White. "Cortical and cytoplasmic flow polarity in early embryonic cells of Caenorhabditis elegans." Journal of Cell Biology 121, no. 6 (June 15, 1993): 1343–55. http://dx.doi.org/10.1083/jcb.121.6.1343.
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We have examined the cortex of Caenorhabditis elegans eggs during pseudocleavage (PC), a period of the first cell cycle which is important for the generation of asymmetry at first cleavage (Strome, S. 1989. Int. Rev. Cytol. 114: 81-123). We have found that directed, actin dependent, cytoplasmic, and cortical flow occurs during this period coincident with a rearrangement of the cortical actin cytoskeleton (Strome, S. 1986. J. Cell Biol. 103: 2241-2252). The flow velocity (4-7 microns/min) is similar to previously determined particle movements driven by cortical actin flows in motile cells. We show that directed flows occur in one of the daughters of the first division that itself divides asymmetrically, but not in its sister that divides symmetrically. The cortical and cytoplasmic events of PC can be mimicked in other cells during cytokinesis by displacing the mitotic apparatus with the microtubule polymerization inhibitor nocodazole. In all cases, the polarity of the resulting cortical and cytoplasmic flows correlates with the position of the attenuated mitotic spindle formed. These cortical flows are also accompanied by a change in the distribution of the cortical actin network. The polarity of this redistribution is similarly correlated with the location of the attenuated spindle. These observations suggest a mechanism for generating polarized flows of cytoplasmic and cortical material during embryonic cleavages. We present a model for the events of PC and suggest how the poles of the mitotic spindle mediate the formation of the contractile ring during cytokinesis in C. elegans.