scholarly journals Effects of a nanoscopic filler on the structure and dynamics of a simulated polymer melt and the relationship to ultrathin films

2001 ◽  
Vol 64 (2) ◽  
Author(s):  
Francis W. Starr ◽  
Thomas B. Schrøder ◽  
Sharon C. Glotzer
Keyword(s):  
Ultrathin Films ◽  
Polymer Melt ◽  
Structure And Dynamics ◽  
The Relationship

Population structure and dynamics of the freshwater shrimp Atyaephyra desmarestii (Millet, 1831) in the lower River Minho (NW Portugal)

Crustaceana ◽  
2015 ◽  
Vol 88 (6) ◽  
pp. 657-673 ◽  
Author(s):  
Maria L. Fidalgo ◽  
Paulo Santos ◽  
Cláudia Ferreira ◽  
Andreia Silva
Keyword(s):  
Water Quality ◽  
Reproductive Period ◽  
Specific Knowledge ◽  
Nw Portugal ◽  
Ecological Relevance ◽  
Structure And Dynamics ◽  
Population Structure And Dynamics ◽  
Autumn And Winter ◽  
The Relationship ◽  
Fast Increase

This paper reports population dynamics, growth, and reproductive features ofAtyaephyra desmarestii(Millet, 1831) from the estuary of the River Minho. Also, data were compared to information available from its distribution range. Samples were taken monthly between October 2010 and September 2011. Males were less abundant and smaller than females. The growth pattern showed hardly any increase during the autumn and winter, but a fast increase in size was recorded in spring, followed by slower growth in summer. The life span was 11-12 months. The reproductive period was from April to August, and mean fecundity reached 643 ± 254 eggs/female. Juveniles started to appear in July and a strong recruitment occurred in summer and autumn. The ecological relevance of the shrimp supports the need of obtaining further and more specific knowledge on the relationship between geographical distribution and water quality. Our results coupled with longer time series in different localities will be essential to the conservation of the species.

scholarly journals Military Service in Early Sixteenth-Century Lithuania: A New Interpretation and Its Implications

Slavic Review ◽  
1971 ◽  
Vol 30 (2) ◽  
pp. 249-256
Author(s):  
Karl von Loewe
Keyword(s):  
Sixteenth Century ◽  
Military Service ◽  
Major Theme ◽  
Structure And Dynamics ◽  
Compulsory Military Service ◽  
New Interpretation ◽  
The Relationship

The existence of compulsory military service has become a major theme in recent attempts to explain the development of Lithuanian society and politics in the early sixteenth century. Much of the discussion has centered on the relationship between military service and feudalism. This article concentrates not on that question but on the nature of military service and the understanding it can provide of the structure and dynamics of the economy of Lithuania in the sixteenth century.

scholarly journals The Interaction of the Parent with the Young Child: Structure and Dynamics of Parental Responsiveness

2020 ◽  
Vol 16 (4) ◽  
pp. 72-86
Author(s):  
I.N. Galasyuk ◽  
O.V. Mitina
Keyword(s):  
Parental Behavior ◽  
Principal Component ◽  
Orthogonal Rotation ◽  
Method Evaluation ◽  
Theoretical Justification ◽  
Parental Responsiveness ◽  
Structure And Dynamics ◽  
Child Interaction ◽  
Principal Component Analyses ◽  
The Relationship

The article presents a theoretical justification of the concept of Parental Responsiveness (PR) based on the cultural and historical concept, the activity paradigm and the results of an empirical study, the purpose of which is to operationalize the psychological construct of parental responsiveness and build an explanatory model of the dynamic functioning of parental responsiveness. The study involved 55 mothers with children between the ages of 2.4 and 3.3 years, developing within the norm. The method "Evaluation of child-parent interaction (ECPI)", which provides video surveillance, was used. The data was processed using the Observer XT-14 computer program. The Principal component analyses the method with orthogonal rotation Varimax was used to identify generalizing categories that characterize PR and allows describing their variations. As a result, there were 4 categories (scales) that determine the manifestation of responsiveness by the parent: Dominance, Apathy, Sensitivity, and Support. Their stability was shown in the process of parent-child interaction. A profile of parental responsiveness is constructed for each parent, which determines the extend of each scale when interacting with the child. The developed dynamic multidimensional autoregressive model of Parental Responsiveness allows us to evaluate the dynamics of parental behavior and determine the nature of the relationship between scales during the session.

Dynamics at a Step on the Diamond (111) Surface

1994 ◽  
Vol 339 ◽  
Author(s):  
Brian N. Davidson ◽  
Warren E. Pickett
Keyword(s):  
Flat Surface ◽  
Tight Binding ◽  
Diamond Growth ◽  
Diamond Structure ◽  
Growth Mechanisms ◽  
Structure And Dynamics ◽  
Graphitic Layer ◽  
Tight Binding Method ◽  
Relationship Of ◽  
The Relationship

ABSTRACTUsing an accurate tight-binding method, we examine the structure and dynamics at a C(lll) step. We find the H vibration frequencies at a step are distinguishable from the flat surface. Removal of H from the surface creates an unstable bulk terminated diamond structure which relaxes to a graphitic layer and pulls away from the bulk. The explanation for these results can be given in terms of the relationship of the band structure to the relaxed geometries. The addition of H stabilizes this surface and reverts it back to sp3 bonding. The addition of CH3 near a step is also discussed. These results are important towards the understanding of possible diamond growth mechanisms that occur at a step.

scholarly journals Estimation of the Air Emissions of Pollutants Influence on Primary Morbidity Indicator of the Population : Case in Kharkiv Region – Ukraine

2021 ◽  
Keyword(s):  
Negative Impact ◽  
Circulatory System ◽  
N2o Emissions ◽  
Regression Equations ◽  
Individual Factor ◽  
Structure And Dynamics ◽  
Air Pollutions ◽  
The Relationship ◽  
Morbidity Indicator ◽  
Structural Shifts

Purpose. To establish structural shifts in the indicators of the primary morbidity of the population, and to determine the relationship between the indicators of emissions of pollutants into the air and the primary morbidity of the population of the Kharkiv region. Methods. We used system approach, statistical methods. Results. The structure and dynamics of the number of newly registered cases of diseases and primary morbidity of the population were considered during the period from 2004 to 2017. A correlation-regression analysis of the relationships between emissions and primary morbidity by disease classes in the Kharkiv region was made, which showed the presence of a moderate correlation between the phenomena. The synthesized regression equations can be used to determine the influence of each individual factor (SO2, CO2, N2O emissions) on the primary morbidity of the population for different classes of diseases. In the structure of primary morbidity of the population of Kharkiv region, the major share is made up of diseases of the respiratory, circulatory and nervous systems - their share increased from 49% in 2004 to 51% in 2017 year. Conclusions. The indicators of primary morbidity by diseases of the genitourinary system, nervous system, circulatory system and congenital malformations were the most sensitive to air pollutions and emission CO2 into the atmosphere. The most negative impact on the values of all classes of primary morbidity in the Kharkiv region have CO2, N2O.

scholarly journals Two classes of functional connectivity in dynamical processes in networks

2021 ◽  
Vol 18 (183) ◽  
Author(s):  
Venetia Voutsa ◽  
Demian Battaglia ◽  
Louise J. Bracken ◽  
Andrea Brovelli ◽  
Julia Costescu ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Network Architecture ◽  
Structural Connectivity ◽  
Ecological Systems ◽  
Dynamical Processes ◽  
Structure And Dynamics ◽  
Theoretical View ◽  
And Function ◽  
The Relationship ◽  
Simultaneous Activity

The relationship between network structure and dynamics is one of the most extensively investigated problems in the theory of complex systems of recent years. Understanding this relationship is of relevance to a range of disciplines—from neuroscience to geomorphology. A major strategy of investigating this relationship is the quantitative comparison of a representation of network architecture (structural connectivity, SC) with a (network) representation of the dynamics (functional connectivity, FC). Here, we show that one can distinguish two classes of functional connectivity—one based on simultaneous activity (co-activity) of nodes, the other based on sequential activity of nodes. We delineate these two classes in different categories of dynamical processes—excitations, regular and chaotic oscillators—and provide examples for SC/FC correlations of both classes in each of these models. We expand the theoretical view of the SC/FC relationships, with conceptual instances of the SC and the two classes of FC for various application scenarios in geomorphology, ecology, systems biology, neuroscience and socio-ecological systems. Seeing the organisation of dynamical processes in a network either as governed by co-activity or by sequential activity allows us to bring some order in the myriad of observations relating structure and function of complex networks.

scholarly journals Simultaneous radar and spaced receiver VHF scintillation observations of ESF irregularities

2006 ◽  
Vol 24 (5) ◽  
pp. 1419-1427 ◽  
Author(s):  
D. Tiwari ◽  
B. Engavale ◽  
A. Bhattacharyya ◽  
C. V. Devasia ◽  
T. K. Pant ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Spectral Width ◽  
Maximum Height ◽  
Plasma Bubble ◽  
Equatorial Spread F ◽  
Structure And Dynamics ◽  
Spread F ◽  
Vhf Scintillation ◽  
Relationship Of ◽  
The Relationship

Abstract. Simultaneous observations of equatorial spread F (ESF) irregularities made on 10 nights during March-April 1998 and 1999, using an 18-MHz radar at Trivandrum (77° E, 8.5° N, dip 0.5° N) and two spaced receivers recording scintillations on a 251-MHz signal at Tirunelveli (77.8° E, 8.7° N, dip 0.4° N), have been used to study the evolution of Equatorial Spread F (ESF) irregularities. Case studies have been carried out on the day-to-day variability in ESF structure and dynamics, as observed by 18-MHz radar, and with spaced receiver measurements of average zonal drift Vo of the 251-MHz radio wave diffraction pattern on the ground, random velocity Vc, which is a measure of random changes in the characteristics of scintillation-producing irregularities, and maximum cross-correlation CI of the spaced receivers signals. Results show that in the initial phase of plasma bubble development, the greater the maximum height of ESF irregularities responsible for the radar backscatter, the greater the decorrelation is of the spaced receiver scintillation signals, indicating greater turbulence. The relationship of the maximum spectral width derived from the radar observations and CI also supports this result.

Population Education through Computer Generated Graphics

1976 ◽  
Vol 4 (4) ◽  
pp. 245-269 ◽  
Author(s):  
Vivian Klaff ◽  
Paul Handler
Keyword(s):  
Energy Use ◽  
Computer Assisted ◽  
Demand And Supply ◽  
University Of Illinois ◽  
Structure And Dynamics ◽  
Population Education ◽  
Dynamics Of Population ◽  
Assisted Instruction ◽  
The University ◽  
The Relationship

The Population Dynamics Group (P.D.G.) computer assisted instruction system is designed to communicate information concerning (a) the structure and dynamics of population and (b) the relationship between population and issues such as economic development, food demand and supply, energy use, etc. This paper focuses on the population model and describes the interactive graphics program as it operates on the University of Illinois PLATO IV system. The P.D.G. programs are a good example of the ability to use currently available developments in computer technology to transmit information in a flexible, interactive and graphic format for instructional purposes.

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