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Journal articles on the topic 'Division by splitting'

Author: Grafiati

Published: 28 June 2021

Last updated: 1 February 2022

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1

Krashen, Daniel, and Kelly McKinnie. "Distinguishing division algebras by finite splitting fields." Manuscripta Mathematica 134, no. 1-2 (2010): 171–82. http://dx.doi.org/10.1007/s00229-010-0390-0.

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2

Beveridge, Terry J., Bob J. Harris, Girishchandra B. Patel, and G. Dennis Sprott. "Cell division and filament splitting in Methanothrix concilii." Canadian Journal of Microbiology 32, no. 10 (1986): 779–86. http://dx.doi.org/10.1139/m86-143.

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Cells of Methanothrix concilii do not possess rigid, shape-forming cell walls; they obtain their cellular form from the portions of the sheath and spacer plugs which enclose them. Electron microscopy has shown that cell division proceeds by the ingrowth of spacer plugs, like the closing of a camera iris, from select regions of the sheath; this process forces the cells to split in two. Therefore, each spacer plug which traverses the filament of cells is a completed division annulus. Spacer plugs are two-layered structures; one layer is an assembly of fine concentric rings and is the first to be

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3

Nizami Huseyn, Elcin, Emin Taleh Mammadov, and Mohammad Hoseini. "A REVIEW ON THE DIVISION OF MAGNETIC RESONANT PROSTATE IMAGES WITH DEEP LEARNING." NATURE AND SCIENCE 03, no. 01 (2021): 13–17. http://dx.doi.org/10.36719/2707-1146/06/13-17.

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Deep learning; it is often used in dividing processes on images in the biomedical field. In recent years, it has been observed that there is an increase in the division procedures performed on prostate images using deep learning compared to other methods of image division. Looking at the literature; It is seen that the process of dividing prostate images, which are carried out with deep learning, is an important step for the diagnosis and treatment of prostate cancer. For this reason, in this study; to be a source for future splitting operations; deep learning splitting procedures on prostate

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4

Amitsur, S. A. "Galois splitting fields of a universal division algebra." Journal of Algebra 143, no. 1 (1991): 236–45. http://dx.doi.org/10.1016/0021-8693(91)90262-7.

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5

Mecke, J. "A note on Cowan’s process of space division." Advances in Applied Probability 21, no. 01 (1989): 235–36. http://dx.doi.org/10.1017/s0001867800017316.

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6

Mecke, J. "A note on Cowan’s process of space division." Advances in Applied Probability 21, no. 1 (1989): 235–36. http://dx.doi.org/10.2307/1427209.

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7

Galindo, George R. B. "SPLITTING TWAIL?" Windsor Yearbook of Access to Justice 33, no. 3 (2017): 37–56. http://dx.doi.org/10.22329/wyaj.v33i3.4886.

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Periodizations are political acts. They produce temporalities that do not necessarily coincide with chronology. TWAIL (Third World Approaches to International Law) scholars have generally endorsed the division of TWAIL into two generations. Whereas TWAIL I was composed by scholars that thought and wrote about international law during the decolonization process, TWAIL II began at the end of the 1990s. Although there are common features between the generations, a number of differences are also identified and emphasized by TWAIL II scholars. In this article, I advance the argument that such perio

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8

Tan Xuegong, 谭学功, 余顺争 Yu Shunzheng, and 张宏滨 Zhang Hongbin. "Manycast Routing in Sparse Splitting Wavelength Division Multiplexing Networks." Acta Optica Sinica 33, no. 7 (2013): 0706022. http://dx.doi.org/10.3788/aos201333.0706022.

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9

Lichtenstein, Bronwen, and Ida M. Johnson. "Splitting the Marital Home: Gendered Property Division and Postdivorce Foreclosure." Journal of Divorce & Remarriage 60, no. 5 (2018): 346–61. http://dx.doi.org/10.1080/10502556.2018.1546065.

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10

Duke, w., and Á. Tóth. "The Splitting of Primes in Division Fields of Elliptic Curves." Experimental Mathematics 11, no. 4 (2002): 555–65. http://dx.doi.org/10.1080/10586458.2002.10504706.

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11

Gao, Fu Qiang. "Failure Analysis and its Numerical Simulation on Impact-Damage Rock." Advanced Materials Research 1010-1012 (August 2014): 1523–26. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1523.

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Stress wave propagation effect and failure characteristics were studied by one-stage light-gas gun induced-plate impact experiment technology on limestone. The results show that dispersion effect and attenuation character are existed in impacting rock; failure division properties are analyzed by splitting cut observation, the results show that the failure specimen can be divided by three different failure divisions which are head failure zone, middle tension-compression failure zone and tail fracture failure zone. On this basis, impact-damaged process of rock is numerically simulated to analyz

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12

Motiee, Mehran. "On the non-existence of cyclic splitting fields for division algebras." Forum Mathematicum 30, no. 2 (2018): 385–95. http://dx.doi.org/10.1515/forum-2016-0121.

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AbstractLetDbe a division algebra over its centerFof degreen. Consider the group{\mu_{Z}(D)=\mu_{n}(F)/Z(D^{\prime})}, where{\mu_{n}(F)}is the group of all then-th roots of unity in{F^{*}}, and{Z(D^{\prime})}is the center of the commutator subgroup of the group of units{D^{*}}ofD. It is shown that if{\mu_{Z}(D\otimes_{F}L)\neq 1}for someLcontaining all the primitive{n^{k}}-th roots of unity for all positive integersk, thenDis not split by any cyclic extension ofF. This criterion is employed to prove that some special classes of division algebras are not cyclically split.

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13

CHAI, LEI, DAHUI WANG, JIAWEI CHEN, MENGHUI LI, and ZENGRU DI. "CLUSTER SPLITTING TRANSITION IN A MARKOV CHAIN MODEL FOR LABOR DIVISION." International Journal of Bifurcation and Chaos 18, no. 02 (2008): 593–98. http://dx.doi.org/10.1142/s0218127408020513.

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A Markov chain model is constructed to simulate pattern formation arising from an evolutionary population of interactive homogeneous agents. In the structure of optimal evolution and stochastic properties, the model exhibits emergent properties with rich dynamical diagrams. We study the cluster splitting transition with the coarsening period-adding phenomena shown by the model, which gives an example of pattern formation in the evolution of complex system and reveals dynamical behavior of the Markov chain process.

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14

Малов, Илья, and Iliy Malov. "Applicability investigations of laser-controlled thermo-splitting technology for manufacturing elements of thermo-optical coating for spacecraft radiators." Science intensive technologies in mechanical engineering 2, no. 12 (2017): 36–39. http://dx.doi.org/10.12737/article_5a313b650da070.69097320.

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In view of a responsible destination and hard operation conditions strong technical requirements are made to glass ele-ments of a thermo-optical coating for spacecraft radiators where a basic requirement of them is absence of chips and micro-cracks. There are carried out investigations of the influence of laser radiation parameters upon end face quality in the in glass element obtained through the method of controlled thermo-splitting. A quality considerable increase is shown in the surfaces of division at the use of the method of the end-to-end laser controlled thermo-splitting in comparison

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15

Fisher, Brent, and John Biddle. "Luminescent spectral splitting: Efficient spatial division of solar spectrum at low concentration." Solar Energy Materials and Solar Cells 95, no. 7 (2011): 1741–55. http://dx.doi.org/10.1016/j.solmat.2011.01.043.

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16

Cowan, Richard. "A mosaic of triangular cells formed with sequential splitting rules." Journal of Applied Probability 41, A (2004): 3–15. http://dx.doi.org/10.1017/s0021900200112161.

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The iterative division of a triangle by chords which join a randomly-selected vertex of a triangle to the opposite side is investigated. Results on the limiting random graph which eventuates are given. Aspects studied are: the order of vertices; the fragmentation of chords; age distributions for elements of the graph; various topological characterisations of the triangles. Different sampling protocols are explored. Extensive use is made of the theory of branching processes.

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Cowan, Richard. "A mosaic of triangular cells formed with sequential splitting rules." Journal of Applied Probability 41, A (2004): 3–15. http://dx.doi.org/10.1239/jap/1082552186.

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The iterative division of a triangle by chords which join a randomly-selected vertex of a triangle to the opposite side is investigated. Results on the limiting random graph which eventuates are given. Aspects studied are: the order of vertices; the fragmentation of chords; age distributions for elements of the graph; various topological characterisations of the triangles. Different sampling protocols are explored. Extensive use is made of the theory of branching processes.

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18

Kumar, Megha, Kumari Pushpa, and Sivaram V. S. Mylavarapu. "Splitting the cell, building the organism: Mechanisms of cell division in metazoan embryos." IUBMB Life 67, no. 7 (2015): 575–87. http://dx.doi.org/10.1002/iub.1404.

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19

de Ville de Goyet, J., F. di Francesco, V. Sottani, et al. "Splitting livers: Trans-hilar or trans-umbilical division? Technical aspects and comparative outcomes." Pediatric Transplantation 19, no. 5 (2015): 517–26. http://dx.doi.org/10.1111/petr.12534.

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20

Hosoki, Takashi, and Daisuke Kimura. "Micropropagation of Centaurea macrocephala Pushk. ex Willd. by Shoot-axis Splitting." HortScience 32, no. 6 (1997): 1124–25. http://dx.doi.org/10.21273/hortsci.32.6.1124.

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Micropropagation of Centaurea macrocephala Pushk. ex Willd. was achieved by subculturing of vertically split shoots and division of axillary buds on MS-based medium with 0.44 μm BA. A proliferation rate of 2.0 per 16-day culture period was obtained. Seventy percent of microcuttings obtained through in vitro culture could be rooted on a modified Hyponex medium with 25 μM IBA. All plantlets were readily acclimatized and grown in a greenhouse. Chemical names used: benzylaminopurine (BA); indole-3-butyric acid (IBA).

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21

K M, Delphin Raj, Sun-Ho Yum, Eunbi Ko, Soo-Young Shin, Jung-Il Namgung, and Soo-Hyun Park. "Multi-Media and Multi-Band Based Adaptation Layer Techniques for Underwater Sensor Networks." Applied Sciences 9, no. 15 (2019): 3187. http://dx.doi.org/10.3390/app9153187.

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In the last few decades, underwater communication systems have been widely used for the development of navy, military, business, and safety applications, etc. However, in underwater communication systems, there are several challenging issues, such as limitations in bandwidth, propagation delay, 3D topology, media access control, routing, resource utilization, and power constraints. Underwater communication systems work under severe channel conditions such as ambient noise, frequency selectivity, multi-path and Doppler shifts. In order to collect and transmit the data in effective ways, multi-m

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22

Cui, Wei, Wei Wang, Jie Zhang, and Jungang Yang. "Multicore structures and the splitting and merging of eddies in global oceans from satellite altimeter data." Ocean Science 15, no. 2 (2019): 413–30. http://dx.doi.org/10.5194/os-15-413-2019.

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Abstract. This study investigated the statistics of eddy splitting and merging in the global oceans based on 23 years of altimetry data. Multicore structures were identified using an improved geometric closed-contour algorithm of sea surface height. Splitting and merging events were discerned from continuous time series maps of sea level anomalies. Multicore structures represent an intermediate stage in the process of eddy evolution, similar to the generation of multiple nuclei in a cell as a preparatory phase for cell division. Generally, splitting or merging events can substantially change (

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23

Tseng, Kuo-Bin. "Efficient multicast routing in wavelength-division-multiplexing networks with light splitting and wavelength conversion." Optical Engineering 44, no. 4 (2005): 045003. http://dx.doi.org/10.1117/1.1886846.

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24

Leventhal, A., S. Ault, and D. Vitek. "The nasotemporal division in primate retina: the neural bases of macular sparing and splitting." Science 240, no. 4848 (1988): 66–67. http://dx.doi.org/10.1126/science.3353708.

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25

Uehara, Tsuyoshi, Thuy Dinh, and Thomas G. Bernhardt. "LytM-Domain Factors Are Required for Daughter Cell Separation and Rapid Ampicillin-Induced Lysis in Escherichia coli." Journal of Bacteriology 191, no. 16 (2009): 5094–107. http://dx.doi.org/10.1128/jb.00505-09.

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ABSTRACT Bacterial cytokinesis is coupled to the localized synthesis of new peptidoglycan (PG) at the division site. This newly generated septal PG is initially shared by the daughter cells. In Escherichia coli and other gram-negative bacteria, it is split shortly after it is made to promote daughter cell separation and allow outer membrane constriction to closely follow that of the inner membrane. We have discovered that the LytM (lysostaphin)-domain containing factors of E. coli (EnvC, NlpD, YgeR, and YebA) are absolutely required for septal PG splitting and daughter cell separation. Mutants

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26

Kawamoto, Manabu, Akiko Fujiwara, Shin-ichi Kuno, and Ikuo Yasumasu. "Changes in the activities of protein phosphatase type 1 and type 2A in sea urchin embryos during early development." Zygote 8, S1 (1999): S68—S69. http://dx.doi.org/10.1017/s0967199400130370.

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Serine/threonine protein phosphatases expected to participate in the process of signal transduction, cell movement such as cell division and gene expression (Kinoshita et al., 1990; Healy et al., 1991; Mayer-Jaekel et al., 1993; Mumby & Walter, 1993), are classified into type 1 (PP1), type 2A (PP2A), type 2B and type 2C in mammalian cells. PP1 and PP2A are known to be strongly inhibited by okadaic acid (OA) (Tachibana et al., 1981; Bialojan Takai, 1988), a polyether fatty acid isolated from the marine sponge Halicondria okadai (Haystead et al., 1989). OA is also known to inhibit PP2A at lo

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27

Shillcock, Richard, and Padraic Monaghan. "The Computational Exploration of Visual Word Recognition in a Split Model." Neural Computation 13, no. 5 (2001): 1171–98. http://dx.doi.org/10.1162/08997660151134370.

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We argue that the projection of the visual field to the cortex constrains and informs the modeling of visual word recognition. On the basis of anatomical and psychological evidence, we claim that the higher-level cognition involved in word recognition does not completely transcend initial foveal splitting. We present a schematic connectionist model of word recognition that instantiates the precise splitting of the visual field and the contralateral projection of the two hemifields. We explore the special nature of the exterior (i.e., first and last) letters of words in reading. The model produ

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28

Beveridge, Terry J., Bob J. Harris, and G. Dennis Sprott. "Septation and filament splitting in Methanospirillum hungatei." Canadian Journal of Microbiology 33, no. 8 (1987): 725–32. http://dx.doi.org/10.1139/m87-126.

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Methanospirillum hungatei GP1 consists of chains of rod-shaped cells separated from one another by "cell spacers" comprised of two spacer plugs sandwiching a loose, amorphous material. The chain is encased within a highly ordered sheath to form a cylindrical, multicelled filament about 5 to 10 cells long under our growth conditions. Cells within the filament divide by septation in a manner similar to gram-positive eubacteria; the plasma membrane and wall grow inward to partition the cell in two. Yet, unlike gram-positive eubacteria, the wall is flexible, since cells round up when extruded from

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29

Derom, Catherine, Evert Thiery, Bart P. F. Rutten, et al. "The East Flanders Prospective Twin Survey (EFPTS): 55 Years Later." Twin Research and Human Genetics 22, no. 6 (2019): 454–59. http://dx.doi.org/10.1017/thg.2019.64.

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AbstractThe East Flanders Prospective Twin Survey (EFPTS) is a registry of multiple births in the province of East Flanders, Belgium. Since its start in 1964, over 10,000 twin-pairs have been registered. EFPTS has several unique features: it is population-based and prospective, with the possibility of long-term follow-up; the twins (and higher order multiple births) are recruited at birth; basic perinatal data are recorded; chorion type and zygosity are established; since 1969, placental biopsies have been taken and frozen at –20°C for future research. Since its origin, the EFPTS has included

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Blickstein, Isaac, and Louis G. Keith. "On the Possible Cause of Monozygotic Twinning: Lessons From the 9-Banded Armadillo and From Assisted Reproduction." Twin Research and Human Genetics 10, no. 2 (2007): 394–99. http://dx.doi.org/10.1375/twin.10.2.394.

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AbstractAvailable hypotheses proposed to explain the mechanism of zygotic splitting fail to explain why monozygotic twins are more prevalent after all methods of assisted reproduction and which structure is likely to control this phenomenon. Arguably, a small proportion of oocytes might have an inborn propensity to undergo splitting upon fertilization leading to the constant prevalence of spontaneous monozygotic conceptions among different populations. Ovarian stimulation would then predictably increase the number of available splitting-prone oocytes and consequently would increase the chance

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31

Herranz, Gonzalo. "The timing of monozygotic twinning: a criticism of the common model." Zygote 23, no. 1 (2013): 27–40. http://dx.doi.org/10.1017/s0967199413000257.

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SummaryIn the dominant model, monozygotic (MZ) twinning is universally accepted as a post-fertilization event resulting from splitting of the embryo along its first 2 weeks of development. The stage at which splitting occurs determines chorionicity and amnionicity. A short history on how the model was built is presented, stressing the role played by some embryologists, in particular George Corner, in its completion and final success. Strikingly, for more than 60 years no deep criticisms have been raised against the model, which, in virtue of its rational and plausible character, enjoys the sta

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32

Derom, Catherine, Evert Thiery, Hilde Peeters, Robert Vlietinck, Paul Defoort, and Jean-Pierre Frijns. "The East Flanders Prospective Twin Survey (EFPTS): An Actual Perception." Twin Research and Human Genetics 16, no. 1 (2012): 58–63. http://dx.doi.org/10.1017/thg.2012.75.

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The East Flanders Prospective Twin Survey (EFPTS) is a prospective, population-based registry of multiple births in the province of East-Flanders, Belgium. EFPTS has several unique features: it is population-based and prospective, with the possibility of long-term follow-up; the twins (and higher order multiple births) are recruited at birth; basic perinatal data recorded; chorion type and zygosity established; and since 1969 placental biopsies have been taken and frozen at −20 °C for later determination of genetic markers. The EFPTS is the only large register that includes placental data and

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33

Mayor, Thibault, York-Dieter Stierhof, Kayoko Tanaka, Andrew M. Fry, and Erich A. Nigg. "The Centrosomal Protein C-Nap1 Is Required for Cell Cycle–Regulated Centrosome Cohesion." Journal of Cell Biology 151, no. 4 (2000): 837–46. http://dx.doi.org/10.1083/jcb.151.4.837.

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Duplicating centrosomes are paired during interphase, but are separated at the onset of mitosis. Although the mechanisms controlling centrosome cohesion and separation are important for centrosome function throughout the cell cycle, they remain poorly understood. Recently, we have proposed that C-Nap1, a novel centrosomal protein, is part of a structure linking parental centrioles in a cell cycle–regulated manner. To test this model, we have performed a detailed structure–function analysis on C-Nap1. We demonstrate that antibody-mediated interference with C-Nap1 function causes centrosome spli

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34

Bertoin, Jean, and Alexander R. Watson. "Probabilistic aspects of critical growth-fragmentation equations." Advances in Applied Probability 48, A (2016): 37–61. http://dx.doi.org/10.1017/apr.2016.41.

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AbstractThe self-similar growth-fragmentation equation describes the evolution of a medium in which particles grow and divide as time proceeds, with the growth and splitting of each particle depending only upon its size. The critical case of the equation, in which the growth and division rates balance one another, was considered in Doumic and Escobedo (2015) for the homogeneous case where the rates do not depend on the particle size. Here, we study the general self-similar case, using a probabilistic approach based on Lévy processes and positive self-similar Markov processes which also permits

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35

Gontar, Anastasia, Vladimir Plotnikov, Nadezda Chernovanova, and Elena Yagupova. "The use of accounting information for assessing the economic security of commercial banks." E3S Web of Conferences 91 (2019): 08065. http://dx.doi.org/10.1051/e3sconf/20199108065.

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The authors studied the use of accounting information for assessing the level of economic security of commercial banks. The article substantiates the choice of financial indicators of credit institutions as input parameters of the neural network. The analytical platform Deductor Studio Academic was chosen as the instrumental environment for assessing the level of economic security of banks. With its help, cluster analysis was performed. The division of the initial set of credit institutions into subsets (economic security classes) used the k-means method with splitting into three clusters: clu

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36

Jones, Laura A., Cécile Villemant, Toby Starborg, et al. "Dynein light intermediate chains maintain spindle bipolarity by functioning in centriole cohesion." Journal of Cell Biology 207, no. 4 (2014): 499–516. http://dx.doi.org/10.1083/jcb.201408025.

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Cytoplasmic dynein 1 (dynein) is a minus end–directed microtubule motor protein with many cellular functions, including during cell division. The role of the light intermediate chains (LICs; DYNC1LI1 and 2) within the complex is poorly understood. In this paper, we have used small interfering RNAs or morpholino oligonucleotides to deplete the LICs in human cell lines and Xenopus laevis early embryos to dissect the LICs’ role in cell division. We show that although dynein lacking LICs drives microtubule gliding at normal rates, the LICs are required for the formation and maintenance of a bipola

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Li, Wenzhi, Mostafa M. Abd El-Samie, Shuang Zhao, Jianqing Lin, Xing Ju, and Chao Xu. "Division methods and selection principles for the ideal optical window of spectral beam splitting photovoltaic/thermal systems." Energy Conversion and Management 247 (November 2021): 114736. http://dx.doi.org/10.1016/j.enconman.2021.114736.

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38

MORENO-TERNERO, JUAN D. "PROPORTIONALITY AND NON-MANIPULABILITY IN BANKRUPTCY PROBLEMS." International Game Theory Review 08, no. 01 (2006): 127–39. http://dx.doi.org/10.1142/s0219198906000825.

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We explore the relationship between proportionality and manipulation (via merging or splitting agents' claims) in bankruptcy problems. We provide an alternative proof to the well-known result that, in an unrestricted domain, immunity to manipulation is equivalent to requiring proportional division. We show that this result also holds for restricted (but sufficiently rich) domains, such as the domain of simple problems and the domain of zero-normalized problems. Finally, we characterize two adjustments of the proportional rule by combining non-manipulabilty on these domains and the usual axioms

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Heredia, Jorge David Figueroa, Jose Ildefonso U. Rubrico, Shouhei Shirafuji, and Jun Ota. "Teaching Tasks to Multiple Small Robots by Classifying and Splitting a Human Example." Journal of Robotics and Mechatronics 29, no. 2 (2017): 419–33. http://dx.doi.org/10.20965/jrm.2017.p0419.

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[abstFig src='/00290002/14.jpg' width='300' text='Two robots performing the task of opening the folding chair lying on the floor' ] In this study, we present a novel framework to address the problem of teaching manipulation tasks performed by a single human to a set of multiple small robots in a short period. First, we focused on classifying the manipulation style used during a human-performed task. An allocator process is proposed to determine the type and number of robots to be taught based on the capabilities of available robots. Then, according to the detected task requirements, robot beha

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40

Sluder, G., and D. A. Begg. "Experimental analysis of the reproduction of spindle poles." Journal of Cell Science 76, no. 1 (1985): 35–51. http://dx.doi.org/10.1242/jcs.76.1.35.

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We have investigated the functional properties of the mechanisms that control the reproduction of spindle poles in fertilized sea-urchin eggs. By prolonging mitosis by three independent means, we show that a spindle pole can split during mitosis into two functional poles of normal appearance. However, these poles have only half the normal reproductive capacity; each daughter cell that receives a split pole, always forms a monopolar spindle at the next division. Each monopolar spindle appears to be exactly half of a spindle because two of them can come together to form a functional bipolar spin

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41

Turner, Erin E., Debra L. Junk, and Susan B. Empson. "Research, Reflection, Practice: The Power of Paper–Folding Tasks: Supporting Multiplicative Thinking and Rich Mathematical Discussion." Teaching Children Mathematics 13, no. 6 (2007): 322–29. http://dx.doi.org/10.5951/tcm.13.6.0322.

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Building understanding of multiplicative relationships is a key goal of mathematics instruction in the upper elementary and middle grades. Multiplicative thinking includes comparing numbers through many processes: multiplication and division (rather than addition and subtraction), ratio, proportions, stretching and shrinking, magnification, scaling, and splitting. Research has shown that multiplicative thinking develops slowly in children, over long periods of time (Clark and Kamii 1996; Vergnaud 1988). Initially, children tend to reason additively about multiplicative situations, and this add

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42

Zhang, Guangwen, Seppo Honkanen, Ari Tervonen, Chun-Meng Wu та S. Iraj Najafi. "Glass integrated optics circuit for 148/155- and 130/155-μm-wavelength division multiplexing and 1/8 splitting". Applied Optics 33, № 16 (1994): 3371. http://dx.doi.org/10.1364/ao.33.003371.

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43

Lippincott, J., K. B. Shannon, W. Shou, R. J. Deshaies, and R. Li. "The Tem1 small GTPase controls actomyosin and septin dynamics during cytokinesis." Journal of Cell Science 114, no. 7 (2001): 1379–86. http://dx.doi.org/10.1242/jcs.114.7.1379.

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Cytokinesis in budding yeast involves an actomyosin-based ring which assembles in a multistepped fashion during the cell cycle and constricts during cytokinesis. In this report, we have investigated the structural and regulatory events that occur at the onset of cytokinesis. The septins, which form an hour-glass like structure during early stages of the cell cycle, undergo dynamic rearrangements prior to cell division: the hourglass structure splits into two separate rings. The contractile ring, localized between the septin double rings, immediately undergoes contraction. Septin ring splitting

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Chevrier, Véronique, Matthieu Piel, Nora Collomb, et al. "The Rho-associated protein kinase p160ROCK is required for centrosome positioning." Journal of Cell Biology 157, no. 5 (2002): 807–17. http://dx.doi.org/10.1083/jcb.200203034.

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The p160–Rho-associated coiled-coil–containing protein kinase (ROCK) is identified as a new centrosomal component. Using immunofluorescence with a variety of p160ROCK antibodies, immuno EM, and depletion with RNA interference, p160ROCK is principally bound to the mother centriole (MC) and an intercentriolar linker. Inhibition of p160ROCK provoked centrosome splitting in G1 with the MC, which is normally positioned at the cell center and shows little motion during G1, displaying wide excursions around the cell periphery, similar to its migration toward the midbody during cytokinesis. p160ROCK i

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Evans, Tucker, and Feng Fu. "Opinion formation on dynamic networks: identifying conditions for the emergence of partisan echo chambers." Royal Society Open Science 5, no. 10 (2018): 181122. http://dx.doi.org/10.1098/rsos.181122.

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Modern political interaction is characterized by strong partisanship and a lack of interest in information sharing and agreement across party lines. It remains largely unclear how such partisan echo chambers arise and how they coevolve with opinion formation. Here, we explore the emergence of these structures through the lens of coevolutionary games. In our model, the payoff of an individual is determined jointly by the magnitude of their opinion, their degree of conformity with their social neighbours and the benefit of having social connections. Each individual can simultaneously adjust thei

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Byle, Philip A. F. "Brood Division and Parental Care in the Period Between Fledging and Independence in the Dunnock (Prunella Modularis)." Behaviour 113, no. 1-2 (1990): 1–19. http://dx.doi.org/10.1163/156853990x00419.

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Abstract1. Brood division was observed in 12 out of the 21 broods of dunnocks. It was stable over the whole period of fledging to independence. 2. Undivided broods were significantly more likely to occur earlier in the season than divided broods. 3. Brood size had no significant effect on the age at which chicks reached independence. 4. The weight (on day 6) of chicks in undivided broods influenced the age at which they reached independence, but no significant relationship was found in divided broods. 5. The provision of extra food significantly reduced the age at which fledglings reached inde

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Gardner, Shea N. "Scheduling Chemotherapy: Catch 22 between Cell Kill and Resistance Evolution." Journal of Theoretical Medicine 2, no. 3 (2000): 215–32. http://dx.doi.org/10.1080/10273660008833047.

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Dose response curves show that prolonged drug exposure at a low concentration may kill more cells than short exposures at higher drug concentrations, particularly for cell cycle phase specific drugs. Applying drugs at low concentrations for prolonged periods, however, allows cells with partial resistance to evolve higher levels of resistance through stepwise processes such as gene amplification. Models are developed for cell cycle specific (CS) and cell cycle nonspecific (CNS) drugs to identify the schedule of drug application that balances this tradeoff.The models predict that a CS drug may b

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Zomeni, Maria, and Ioannis N. Vogiatzakis. "Roads and Roadless Areas in Cyprus: Implications For The Natura 2000 Network." Journal of Landscape Ecology 7, no. 1 (2014): 75–90. http://dx.doi.org/10.2478/jlecol-2014-0010.

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Abstract The road network in Cyprus has seen an 88% increase in the last 20 years. This expansion has not been followed by any kind of assessment on the effects of the network on nature conservation. This is the first island-wide quantitative assessment of the size, character (surface types), pervasiveness and distribution of the road system with particular reference to Natura 2000 network on the island. We mapped roadless areas (i.e. areas at least one km away from nearest road) for the whole island and examined the spatial distribution with respect to Natura 2000. We tested the relationship

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Sivatski, A. S. "Central simple algebras of prime exponent and divided power operations." Journal of K-Theory 11, no. 1 (2013): 113–23. http://dx.doi.org/10.1017/is013001008jkt197.

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AbstractLet p be a prime and F a field of characteristic different from p. Suppose all p-primary roots of unity are contained in F. Let α ∈ pBr(F) which has a cyclic splitting field. We prove that γi(α) = 0 for all i ≥ 2, where γi : pBr(F) → K2i(F)/pK2i(F) are the divided power operations of degree p. We also show that if char F ≠ 2, √−1 ∈ F*. D ∈2 Br(F), indD = 8 and a ∈ F* such that ind DF(√a) = 4, then γ3(D) = {a,s}γ2(D) for some s ∈ F*. Consequently, we prove that if D, considered as a division algebra, has a subfield of degree 4 of certain type, then γ3(D) = 0. At the end of the paper we

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Chen, Chun-Ti, and Marc-Jan Gubbels. "TgCep250 is dynamically processed through the division cycle and is essential for structural integrity of the Toxoplasma centrosome." Molecular Biology of the Cell 30, no. 10 (2019): 1160–69. http://dx.doi.org/10.1091/mbc.e18-10-0608.

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The apicomplexan centrosome has a unique bipartite structure comprising an inner and outer core responsible for the nuclear cycle (mitosis) and budding cycles (cytokinesis), respectively. Although these two cores are always associated, they function independently to facilitate polyploid intermediates in the production of many progeny per replication round. Here, we describe the function of a large coiled-coil protein in Toxoplasma gondii, TgCep250, in connecting the two centrosomal cores and promoting their structural integrity. Throughout the cell cycle, TgCep250 localizes to the inner core b

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