Simultaneously improving global and local properties of virtual electric field

2006 ◽  
Vol 42 (17) ◽  
pp. 967 ◽  
Author(s):  
G. Zhu ◽  
Q. Zeng ◽  
C. Wang
Keyword(s):  
Electric Field ◽  
Local Properties ◽  
Virtual Electric Field ◽  
Global And Local

scholarly journals 22 Year Solar Magnetic Cycle and its relation to Convection Zone Dynamics

2018 ◽  
Vol 13 (S340) ◽  
pp. 9-10 ◽  
Author(s):  
Kiran Jain ◽  
Sushanta Tripathy ◽  
Rudolf Komm ◽  
Frank Hill ◽  
Rosaria Simoniello
Keyword(s):  
Convection Zone ◽  
Magnetic Cycle ◽  
Solar Magnetic Cycle ◽  
Local Properties ◽  
Global And Local

AbstractUsing continuous observations for 22 years from ground-based network GONG and space-borne instruments MDI onboard SoHO and HMI onboard SDO, we report both global and local properties of the convection zone and their variations with time.

scholarly journals System dynamics models as decision-making tools in agritourism

Agricultura ◽  
2016 ◽  
Vol 13 (1-2) ◽  
pp. 5-10 ◽  
Author(s):  
Tadeja Jere Jakulin
Keyword(s):  
Decision Making ◽  
System Dynamics ◽  
Social Factors ◽  
Qualitative And Quantitative ◽  
Causal Connections ◽  
Local Properties ◽  
Dynamics Models ◽  
Global And Local ◽  
And Training ◽  
Develop System

Abstract Agritourism as a type of niche tourism is a complex and softly defined phaenomenon. The demands for fast and integrated decision regarding agritourism and its interconnections with environment, economy (investments, traffic) and social factors (tourists) is urgent. Many different methodologies and methods master softly structured questions and dilemmas with global and local properties. Here we present methods of systems thinking and system dynamics, which were first brought into force in the educational and training area in the form of different computer simulations and later as tools for decision-making and organisational re-engineering. We develop system dynamics models in order to present accuracy of methodology. These models are essentially simple and can serve only as describers of the activity of basic mutual influences among variables. We will pay the attention to the methodology for parameter model values determination and the so-called mental model. This one is the basis of causal connections among model variables. At the end, we restore a connection between qualitative and quantitative models in frame of system dynamics.

scholarly journals Multi-sensor Aerosol Products Sampling System (MAPSS)

2012 ◽  
Vol 5 (5) ◽  
pp. 913-926 ◽  
Author(s):  
M. Petrenko ◽  
C. Ichoku ◽  
G. Leptoukh
Keyword(s):  
Atmospheric Aerosols ◽  
Integrated Analysis ◽  
Sampling System ◽  
Sampling Methodology ◽  
Multiple Sensors ◽  
Direct Cross ◽  
Local Properties ◽  
Complete Set ◽  
Global And Local ◽  
Level 2

Abstract. Global and local properties of atmospheric aerosols have been extensively observed and measured using both spaceborne and ground-based instruments, especially during the last decade. Unique properties retrieved by the different instruments contribute to an unprecedented availability of the most complete set of complimentary aerosol measurements ever acquired. However, some of these measurements remain underutilized, largely due to the complexities involved in analyzing them synergistically. To characterize the inconsistencies and bridge the gap that exists between the sensors, we have established a Multi-sensor Aerosol Products Sampling System (MAPSS), which consistently samples and generates the spatial statistics (mean, standard deviation, direction and rate of spatial variation, and spatial correlation coefficient) of aerosol products from multiple spaceborne sensors, including MODIS (on Terra and Aqua), MISR, OMI, POLDER, CALIOP, and SeaWiFS. Samples of satellite aerosol products are extracted over Aerosol Robotic Network (AERONET) locations as well as over other locations of interest such as those with available ground-based aerosol observations. In this way, MAPSS enables a direct cross-characterization and data integration between Level-2 aerosol observations from multiple sensors. In addition, the available well-characterized co-located ground-based data provides the basis for the integrated validation of these products. This paper explains the sampling methodology and concepts used in MAPSS, and demonstrates specific examples of using MAPSS for an integrated analysis of multiple aerosol products.

scholarly journals Mapping transient electric fields with picosecond electron bunches

2015 ◽  
Vol 112 (47) ◽  
pp. 14479-14483 ◽  
Author(s):  
Long Chen ◽  
Runze Li ◽  
Jie Chen ◽  
Pengfei Zhu ◽  
Feng Liu ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Aluminum Foil ◽  
Particle Accelerators ◽  
Inversion Algorithm ◽  
Time Resolved ◽  
Electron Bunches ◽  
Laser Plasmas ◽  
Global And Local ◽  
Transient Electric Field

Transient electric fields, which are an important but hardly explored parameter of laser plasmas, can now be diagnosed experimentally with combined ultrafast temporal resolution and field sensitivity, using femtosecond to picosecond electron or proton pulses as probes. However, poor spatial resolution poses great challenges to simultaneously recording both the global and local field features. Here, we present a direct 3D measurement of a transient electric field by time-resolved electron schlieren radiography with simultaneous 80-μm spatial and 3.7-ps temporal resolutions, analyzed using an Abel inversion algorithm. The electric field here is built up at the front of an aluminum foil irradiated with a femtosecond laser pulse at 1.9 × 1012 W/cm2, where electrons are emitted at a speed of 4 × 106 m/s, resulting in a unique “peak–valley” transient electric field map with the field strength up to 105 V/m. Furthermore, time-resolved schlieren radiography with charged particle pulses should enable the mapping of various fast-evolving field structures including those found in plasma-based particle accelerators.

Effect of pressure on the global and local properties of cubic perovskite crystals

2011 ◽  
Vol 84 (2) ◽  
pp. 025704 ◽  
Author(s):  
Tarik Ouahrani ◽  
I Merad-Boudia ◽  
H Baltache ◽  
R Khenata ◽  
Z Bentalha
Keyword(s):  
Effect Of Pressure ◽  
Local Properties ◽  
Global And Local

scholarly journals Observations from SANSA’s geomagnetic network during the Saint Patrick’s Day storm of 17–18 March 2015

2019 ◽  
Vol 115 (1/2) ◽  
Author(s):  
Emmanuel Nahayo ◽  
Pieter B. Kotzé ◽  
Pierre J. Cilliers ◽  
Stefan Lotz
Keyword(s):  
Electric Field ◽  
Space Weather ◽  
Power Distribution ◽  
Geomagnetic Storms ◽  
Geomagnetically Induced Currents ◽  
Weather Events ◽  
Induced Currents ◽  
Temporary Disturbance ◽  
Global And Local ◽  
Magnetic Observatories

Geomagnetic storms are space weather events that result in a temporary disturbance of the earth’s magnetosphere caused by a solar wind that interacts with the earth’s magnetic field. We examined more closely how some southern African magnetic observatories responded to the Saint Patrick’s Day storm using local K-indices. We show how this network of observatories may be utilised to model induced electric field, which is useful for the monitoring of geomagnetically induced anomalous currents capable of damaging power distribution infrastructure. We show an example of the correlation between a modelled induced electric field and measured geomagnetically induced currents in southern Africa. The data show that there are differences between global and local indices, which vary with the phases of the storm. We show the latitude dependence of geomagnetic activity and demonstrate that the direction of the variation is different for the X and Y components. Significance: • The importance of ground-based data in space weather studies is demonstrated. • We show how SANSA’s geomagnetic network may be utilised to model induced electric field, which is useful for the monitoring of geomagnetically induced anomalous currents capable of damaging power distribution infrastructure.

External force of snake: virtual electric field

2002 ◽  
Vol 38 (24) ◽  
pp. 1500 ◽  
Author(s):  
Hyun Keun Park ◽  
Myung Jin Chung
Keyword(s):  
Electric Field ◽  
External Force ◽  
Virtual Electric Field
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