scispace - formally typeset
Search or ask a question

Answers from top 10 papers

More filters
Papers (10)Insight
The radial electric field shear from negative to positive appears in the region and this suggests the boundary between open and closed field lines.
On two of the experiments the electric fields perpendicular to B were found to be exactly conjugate, indicating that the field lines were equipotentials.
This observation supports the theory that the E -region electric fields are projected into the F -region along the electrically equipotential magnetic field lines.
Experimental results are in agreement with the presence of a parallel electric field along the field lines in the upper ionosphere.
These observations argue strongly for the existence of an electric field in a region of closed magnetic field lines.
The related potential difference accross the open field lines is about 15 kV, which can be responsible for the background electric field measured in the polar caps.
However, although the field line connectivity of individual field lines can change rapidly, the overall pattern of field line mapping appears to deform gradually.
The observations indicate that reflections of energetic electrons may occur at possible electric field configurations parallel to the direction of the magnetic lines of force in an altitude range of several thousand kilometers above the ionosphere.
The results obtained indicates that the ELF EMF radiation level within the study area (outside ROW) generated by the power lines but their field strengths were within the permissible exposure limits by ICNIRP which were 0.03% and 5.26% for magnetic and electric field respectively.
The improvement is tentatively attributed to a modification of the electric potential in the plasma carried by the open field lines.

See what other people are reading

Is there any research on zno-sic composite?
5 answers
Amount of heat transferred from perpendicular to parallel component due to pitch angle scattering
5 answers
The position in terms of coordinates of carletonville in gluten?
5 answers
How composition of matter can be determined?
4 answers
What are the most effective electrical shock prevention methods for industrial workers?
4 answers
The most effective electrical shock prevention methods for industrial workers include the use of advanced devices like electric shock prevention systems with electric field absorption shielding units and protection triggers. Additionally, implementing high-voltage DC systems with control circuits and determining units to monitor and control current flow can significantly reduce the risk of electric shocks. Moreover, the development of dual-arm collaborative robotic systems for high-voltage live work, equipped with human-computer interfaces and teleoperation functions, enhances worker safety by allowing remote operation and automation of tasks, thereby reducing labor intensity and ensuring safety during operations. Understanding electrical safety risks, the effects of electric current on the human body, and implementing appropriate protection measures are crucial for maintaining safe working conditions in industrial settings.
What factor influence oil displacemet activity?
5 answers
The factors influencing oil displacement activity include pressure, original oil-gas ratio, hydrocarbon gas composition, injection method, wettability, interfacial tension, viscosity, and physical heterogeneity. For instance, higher pressure and propane content in hydrocarbon gas can enhance displacement efficiency, while a low original oil-gas ratio may reduce efficiency. Additionally, the wettability factor and interfacial tension factor play crucial roles in evaluating oil displacement agents' efficiency, with a decrease in these factors leading to improved displacement efficiency. Moreover, the physical heterogeneity of the reservoir and the displacement ratio are significant factors affecting micro water oil displacement efficiency in low permeability sandstone reservoirs. Understanding these factors is essential for optimizing oil recovery processes and achieving higher displacement efficiencies.
What are experimental techniques and observations of the physics of liquid jets?
5 answers
Experimental techniques and observations of the physics of liquid jets encompass a variety of approaches and findings. Studies have delved into areas such as capillary oscillations on perturbed liquid jets using laser illumination, investigating micro-jets produced with a gas dynamic virtual nozzle under the influence of an electric field, exploring liquid jets produced by an electrical explosion in water in round tubes, and examining injectors with non-circular geometries to enhance liquid injection characteristics. These investigations have involved techniques like laser illumination, electronic detection of jet shadows, high-speed photography, and image processing software to analyze jet dynamics, dimensions, and flow regimes. The results have revealed insights into jet behavior, including jet patterns influenced by tube diameter, jet acceleration under electric fields, and the impact of injector geometry on liquid flow characteristics.
Protein conformations are influenced by?
5 answers
Protein conformations are influenced by various factors such as pH, temperature, ligand binding, electric fields, mechanical forces, and interactions with material surfaces. Computational methods like constant pH molecular dynamics simulations, molecular docking, and variance analysis provide insights into conformational changes. Electric fields can induce structural transitions in proteins, affecting stability and hydrogen bonding. Mechanical forces alter protein stiffness and compliance, impacting unfolding and refolding transitions. Interactions with material surfaces, including nanomaterials and polymers, can lead to conformational changes affecting protein function and cellular responses. Understanding these influences is crucial for designing biotic-abiotic interfaces in biomedical and biotechnological applications.
How does the concentration of electrolytes affect the conductivity of electrochemical sensors?
5 answers
The concentration of electrolytes significantly impacts the conductivity of electrochemical sensors. At low concentrations, the Debye-Hückel-Onsager theory predicts conductivity accurately, but at higher concentrations, a modified Coulomb interaction theory is needed to suppress short-range electrostatic interactions. This modified theory extends to multivalent ions and high electric fields, addressing deviations like the Wien effect, showing agreement with experimental data and simulations. Additionally, a semiempirical model with five parameters correlates conductivity, concentration, and temperature data of electrolyte solutions at medium to high concentrations, proving valuable for practical engineering applications. Understanding these effects is crucial for evaluating and enhancing the performance of electrochemical systems.
What is the time for water to be separated from crude oil?
4 answers
The time required for water separation from crude oil varies depending on the method used. In the presence of a demulsifier, the fastest coalescence rate of water droplets was observed within the first minute, with binary coalescence times ranging from 4.2 to 5.4 seconds. Additionally, a method involving high electric field (HEF) demulsification showed a decline in water content in oil samples after exposure to an alternating current electric field for 1 hour, with significant differences noted between samples exposed to different frequencies and voltages. Another method involved mixing a saline solution with a crude oil sample, followed by centrifugation for 15 minutes to separate water from the oil, providing a rapid and precise test for water content in crude oil.
What can possibly cause the pcr curve evade the threshold line?
4 answers
The PCR curve can deviate from the threshold line due to factors such as the exponential amplification assumption not being strictly met, leading to discrepancies in efficiency. Additionally, in real-time PCR, signal interferences can impact the determination of the cycle threshold (Ct) value, affecting the accuracy of the curve. Moreover, in the context of superconductors, the transition from a superconducting state to a normal resistance state is irreversible, indicating that certain thresholds, like magnetic field values, can cause fundamental changes in material properties. Therefore, deviations from the threshold line in PCR curves can stem from various sources, including efficiency variations, signal interferences, and irreversible transitions akin to those observed in superconductors.