Solutions of Stochastic Systems Generalized Over Temporal and Spatial Variables

2014 ◽  
pp. 353-370
Author(s):  
Irina V. Melnikova ◽  
Uliana A. Alekseeva ◽  
Vadim A. Bovkun
Keyword(s):  
Stochastic Systems ◽  
Spatial Variables ◽  
Temporal And Spatial

scholarly journals Creative Clusters: Towards the Governance of the Creative Industries Production System?

2004 ◽  
Vol 112 (1) ◽  
pp. 50-66 ◽  
Author(s):  
Andy C. Pratt
Keyword(s):  
Production System ◽  
Cluster Model ◽  
Creative Industries ◽  
Spatial Variables ◽  
Individual Firm ◽  
Alternative Approach ◽  
Temporal And Spatial

The aim of this paper is to critically assess the notion of the creative cluster, and to consider whether it is an appropriate tool for the governance of the creative industries, or even a suitable point from which to begin an analysis of the creative industries. The paper argues that creative clusters are formally a subset of business clusters. A critique of the business clusters literature highlights its shortcomings: a focus on individual firm preferences and a lack of attention to non-economic, situated temporal and spatial variables; a lack of attention to the specificity of particular industries and their associated regulatory peculiarities; and finally, information issues associated with the operationalisation of the cluster model. The paper concludes with a discussion of an alternative approach, looking at a creative industries production system that would better meet the concerns of those seeking to govern the creative industries and creative clusters.

scholarly journals Humpback whales feed on hatchery-released juvenile salmon

2017 ◽  
Vol 4 (7) ◽  
pp. 170180 ◽  
Author(s):  
Ellen M. Chenoweth ◽  
Janice M. Straley ◽  
Megan V. McPhee ◽  
Shannon Atkinson ◽  
Steve Reifenstuhl
Keyword(s):  
Prey Capture ◽  
Coho Salmon ◽  
Humpback Whales ◽  
Juvenile Salmon ◽  
Anthropogenic Source ◽  
Behavioural Plasticity ◽  
Southeast Alaska ◽  
Spatial Variables ◽  
Temporal And Spatial

Humpback whales are remarkable for the behavioural plasticity of their feeding tactics and the diversity of their diets. Within the last decade at hatchery release sites in Southeast Alaska, humpback whales have begun exploiting juvenile salmon, a previously undocumented prey. The anthropogenic source of these salmon and their important contribution to local fisheries makes the emergence of humpback whale predation a concern for the Southeast Alaska economy. Here, we describe the frequency of observing humpback whales, examine the role of temporal and spatial variables affecting the probability of sighting humpback whales and describe prey capture behaviours at five hatchery release sites. We coordinated twice-daily 15 min observations during the spring release seasons 2010–2015. Using logistic regression, we determined that the probability of occurrence of humpback whales increased after releases began and decreased after releases concluded. The probability of whale occurrence varied among release sites but did not increase significantly over the 6 year study period. Whales were reported to be feeding on juvenile chum, Chinook and coho salmon, with photographic and video records of whales feeding on coho salmon. The ability to adapt to new prey sources may be key to sustaining their population in a changing ocean.

Quasi-Periodic Solutions to the Mixed Kaup-Newell Hierarchy

2018 ◽  
Vol 73 (7) ◽  
pp. 579-593
Author(s):  
Jinbing Chen
Keyword(s):  
Riemann Surface ◽  
Periodic Solutions ◽  
Hamiltonian Systems ◽  
Lax Pair ◽  
Spatial Variables ◽  
Jacobi Variety ◽  
Parametric Solutions ◽  
Finite Dimensional ◽  
Temporal And Spatial ◽  
Jacobi Inversion

AbstractThe mixed Kaup-Newell (mKN) hierarchy, including the nonholonomic deformation of the KN equation, is obtained in the Lenard scheme. By the nonlinearisation of the Lax pair, the mKN hierarchy is reduced to a family of mixed, finite-dimensional Hamiltonian systems (FDHSs) that separate its temporal and spatial variables. It turns out that the Bargmann map not only gives rise to the finite parametric solutions of the mKN hierarchy but also specifies a finite-dimensional, invariant subspace for the mKN flows. The Abel-Jacobi variables are selected to linearise the mKN flows on the Jacobi variety of a Riemann surface, from which some quasi-periodic solutions of mKN hierarchy are presented by using the Riemann-Jacobi inversion.

Two kinds of finite-dimensional integrable reduction to the Harry–Dym hierarchy

2016 ◽  
Vol 30 (32n33) ◽  
pp. 1650396
Author(s):  
Jinbing Chen
Keyword(s):  
Hamiltonian Systems ◽  
Tangent Bundle ◽  
Type Systems ◽  
Lax Pair ◽  
Symplectic Space ◽  
Spatial Variables ◽  
Parametric Solutions ◽  
Finite Dimensional ◽  
Neumann Type ◽  
Temporal And Spatial

In this paper, two kinds of finite-dimensional integrable reduction are studied for the Harry–Dym (HD) hierarchy. From the nonlinearization of Lax pair, the HD hierarchy is reduced to a class of finite-dimensional Hamiltonian systems (FDHSs) in view of a Bargmann map and a set of Neumann type systems by a Neumann map, which separate temporal and spatial variables on the symplectic space [Formula: see text] and the tangent bundle of ellipsoid [Formula: see text], respectively. It turns out that involutive solutions of the resulted finite-dimensional integrable systems (FDISs) directly give rise to finite parametric solutions of HD hierarchy through the Bargmann and Neumann maps. The finite-gap potential to the high-order stationary HD equation is obtained that cuts out a finite-dimensional invariant subspace for the HD flows. Finally, some comparisons of two kinds of integrable reductions are then discussed.

scholarly journals The Effects of Lower Extremity Kinesio Taping on Temporal and Spatial Parameters of Gait Initiation in Semi-professional Soccer Players With and Without Functional Ankle Instability

2021 ◽  
Author(s):  
Sara Fereydounnia ◽  
Azadeh Shadmehr ◽  
Behrouz Attarbashi Moghadam ◽  
Saeed Talebian Moghadam ◽  
Seyed Mohsen Mir ◽  
...  
Keyword(s):  
Ankle Instability ◽  
Force Plate ◽  
Gait Initiation ◽  
Postural Adjustment ◽  
Functional Ankle Instability ◽  
Spatial Variables ◽  
Kinesio Taping ◽  
Professional Soccer ◽  
Before And After ◽  
Temporal And Spatial

Introduction: The present study aimed to investigate the immediate effects of two types of Kinesio taping on the temporal and spatial variables of gait initiation in individuals with and without Functional Ankle Instability (FAI). Materials and Methods: Thirty semi-professional athletes (15 with and 15 without FAI [control]) were recruited for this study. The gait initiation task was examined before and after the two types of Kinesio taping on a force plate. Temporal (Reaction Phase [RP], Anticipatory Postural Adjustment Phase [APAP]), and spatial variables were recorded and compared between Groups, before and after the tape application. Results: The results of multiple repeated-measure analyses of variance showed no significant differences for “factor” and “Group by factor” interaction effects for any outcome measure (P>0.05). There were no significant differences for Group effects except for the APAP (F=10.27, P=0.003). The APAA was 71.95 ms longer in the FAI Group (476.95±15.87 ms) compared to the control Group (405.04±15.87 ms). Conclusion: Kinesio taping application does not influence any of the gait initiation parameters on the force plate. Participants with FAI demonstrated longer APAP which might be due to recurrent injury and instability during sports or physical activity.

scholarly journals Soccer Scoring Techniques — a Scientific Re-conception of Time and Space via Biomechanical Modeling

2020 ◽  
Author(s):  
Xiang Zhang ◽  
Gongbing Shan
Keyword(s):  
High Risk ◽  
Current Literature ◽  
Training Programs ◽  
Spatial Theory ◽  
Biomechanical Modeling ◽  
Time And Space ◽  
Spatial Variables ◽  
Temporal And Spatial ◽  
Spatial Identification

From a scientific standpoint, both temporal and spatial variables must be examined when developing programs for training various soccer scoring techniques (SSTs), but a review of current literature reveals that existing scientific studies have overlooked this combinatory influence. Consequently, there is no reliable theory on temporal-spatial identification when evaluating scoring opportunities. Quantified by using biomechanical modeling, anthropometry, and SSTs found in FIFA Puskás Award (121 nominated goals between 2009 and 2020), it is found that players’ proprioceptive/effective shooting volume (i.e. players’ attack space) could be sevenfold the currently-practiced shooting volume. The ignorance of some SSTs’ training leads to the underuse of the potential shooting volume. These overlooked SSTs are airborne and/or acrobatic techniques, perceived as high-risk and low-reward. Relying on the talent of an athlete to improvise on the fly can hardly be considered as a viable coaching strategy. Therefore, for developing science-based SST training regimes, groundbreaking studies are needed to: 1) expand the perception of shooting volume, and 2) entrain one-touch-shot techniques (airborne/acrobatic) within this volume, in short, Focusing-on-Time-in-Space. Whence, the new temporal-spatial theory could guide future researches and develop novel training programs. An increase of airborne/acrobatic goals would ultimately further enhance the excitement of the game.

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

Ultrastructural analysis of unique glycoconjugates in the rat olfactory system

1992 ◽  
Vol 50 (1) ◽  
pp. 890-891
Author(s):  
James E. Crandall ◽  
Linda C. Hassinger ◽  
Gerald A. Schwarting
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Monoclonal Antibodies ◽  
Olfactory System ◽  
Olfactory Bulbs ◽  
Temporal And Spatial Patterns ◽  
Carbohydrate Epitopes ◽  
Olfactory Systems ◽  
Temporal And Spatial ◽  
Cell Surface Glycoconjugates

Cell surface glycoconjugates are considered to play important roles in cell-cell interactions in the developing central nervous system. We have previously described a group of monoclonal antibodies that recognize defined carbohydrate epitopes and reveal unique temporal and spatial patterns of immunoreactivity in the developing main and accessory olfactory systems in rats. Antibody CC2 reacts with complex α-galactosyl and α-fucosyl glycoproteins and glycolipids. Antibody CC1 reacts with terminal N-acetyl galactosamine residues of globoside-like glycolipids. Antibody 1B2 reacts with β-galactosyl glycolipids and glycoproteins. Our light microscopic data suggest that these antigens may be located on the surfaces of axons of the vomeronasal and olfactory nerves as well as on some of their target neurons in the main and accessory olfactory bulbs.

Temporal and spatial interrelationships of confronting cisternae to nuclear envelope

1992 ◽  
Vol 50 (1) ◽  
pp. 930-931
Author(s):  
John R. Palisano
Keyword(s):  
Endoplasmic Reticulum ◽  
Nuclear Envelope ◽  
Tumor Cells ◽  
Hela Cells ◽  
Microscopic Investigation ◽  
Electron Microscopic Investigation ◽  
Serial Sections ◽  
Electron Microscopic ◽  
Fetal Rat ◽  
Temporal And Spatial

Although confronting cistemae (CC) have been observed in a variety of tumor cells and normal fetal rat, mouse, and human epithelial tissues, little is known about their origin or role in mitotic cells. While several investigators have suggested that CC arise from nuclear envelope (NE) folding back on itself during prophase, others have suggested that CC arise when fragments of NE pair with endoplasmic reticulum. An electron microscopic investigation of 0.25 um thick serial sections was undertaken to examine the origin of CC in HeLa cells.

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