A new approach in the derivation of the Larmor formula for radiation loss from an accelerating charged particle

2013 ◽  
Vol 91 (7) ◽  
pp. 501-505
Author(s):  
Biswaranjan Dikshit
Keyword(s):  
Charged Particle ◽  
Energy Loss ◽  
Physical Phenomenon ◽  
Radiation Loss ◽  
Three Dimensions ◽  
New Approach ◽  
Acceleration Field ◽  
Work Done ◽  
Insight Into

Normally, the Larmor formula for the rate of energy loss from an accelerating charged particle (e.g., an electron) is derived by considering the energy due to the acceleration field being transmitted to infinity without attenuation. This method does not give any insight into the actual physical phenomenon occurring at the particle itself that is responsible for the loss of energy. To circumvent this problem, we develop a different approach in which the Larmor formula is derived by considering the work done against self-forces created within the particle when it is accelerated. We carry out this analysis in three dimensions so that it is easy to visualize the events happening inside the particle during the acceleration that result in loss of energy. Thus, our method clearly demonstrates the mechanism of energy loss from an accelerated charged particle.

A FAST-MANIFOLD APPROACH TO MELNIKOV FUNCTIONS FOR SLOWLY VARYING OSCILLATORS

1996 ◽  
Vol 06 (08) ◽  
pp. 1575-1578 ◽  
Author(s):  
SHYH-LEH CHEN ◽  
STEVEN W. SHAW
Keyword(s):  
Present Method ◽  
Homoclinic Orbits ◽  
Melnikov Function ◽  
Three Dimensions ◽  
Distance Functions ◽  
New Approach ◽  
Alternative Derivation ◽  
Melnikov Functions ◽  
Melnikov Analysis ◽  
Insight Into

A new approach to obtaining the Melnikov function for homoclinic orbits in slowly varying oscillators is proposed. The present method applies the usual two-dimensional Melnikov analysis to the “fast” dynamics of the system which lie on an invariant manifold. It is shown that the resultant Melnikov function is the same as that obtained in the usual way involving distance functions in three dimensions [Wiggins and Holmes, 1987]. This alternative derivation provides some useful insight into the structure of the dynamical system.

scholarly journals Can Economic Factors Improve Momentum Trading Strategies? The Case of Managed Futures during the COVID-19 Pandemic

Economies ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 86
Author(s):  
Renata Guobužaitė ◽  
Deimantė Teresienė
Keyword(s):  
Financial Markets ◽  
Risk Premium ◽  
Trading Strategies ◽  
Economic Factors ◽  
Momentum Strategies ◽  
New Approach ◽  
Managed Futures ◽  
Asset Classes ◽  
Momentum Trading ◽  
Insight Into

Systematic momentum trading is a prevalent risk premium strategy in different portfolios. This paper focuses on the performance of the managed futures strategy based on the momentum signal across different economic regimes, focusing on the COVID-19 pandemic period. COVID-19 had a solid but short-lived impact on financial markets, and therefore gives a unique insight into momentum strategies’ performance during such critical moments of market stress. We offer a new approach to implementing momentum strategies by adding macroeconomic variables to the model. We test a managed futures strategy’s performance with a well-diversified futures portfolio across different asset classes. The research concludes that constructing a portfolio based on academically/economically sound momentum signals with its allocation timing based on broader economic factors significantly improves managed futures strategies and adds significant diversification benefits to the investors’ portfolios.

scholarly journals Individualized Hemodynamic Management in Sepsis

2021 ◽  
Vol 11 (2) ◽  
pp. 157
Author(s):  
Marcell Virág ◽  
Tamas Leiner ◽  
Mate Rottler ◽  
Klementina Ocskay ◽  
Zsolt Molnar
Keyword(s):  
Fluid Overload ◽  
Fluid Management ◽  
Multiple Organ ◽  
Treatment Protocols ◽  
Hemodynamic Management ◽  
New Approach ◽  
Hemodynamic Optimization ◽  
The Individual ◽  
Sepsis And Septic Shock ◽  
Insight Into

Hemodynamic optimization remains the cornerstone of resuscitation in the treatment of sepsis and septic shock. Delay or inadequate management will inevitably lead to hypoperfusion, tissue hypoxia or edema, and fluid overload, leading eventually to multiple organ failure, seriously affecting outcomes. According to a large international survey (FENICE study), physicians frequently use inadequate indices to guide fluid management in intensive care units. Goal-directed and “restrictive” infusion strategies have been recommended by guidelines over “liberal” approaches for several years. Unfortunately, these “fixed regimen” treatment protocols neglect the patient’s individual needs, and what is shown to be beneficial for a given population may not be so for the individual patient. However, applying multimodal, contextualized, and personalized management could potentially overcome this problem. The aim of this review was to give an insight into the pathophysiological rationale and clinical application of this relatively new approach in the hemodynamic management of septic patients.

scholarly journals Simulation of Folding Kinetics for Aligned RNAs

Genes ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 347
Author(s):  
Jiabin Huang ◽  
Björn Voß
Keyword(s):  
Evolutionary Conservation ◽  
Folding Kinetics ◽  
New Approach ◽  
Computational Approaches ◽  
Reasonable Time ◽  
Valuable Method ◽  
Kinetics Of ◽  
Insight Into ◽  
Folding Space ◽  
Standing Problem

Studying the folding kinetics of an RNA can provide insight into its function and is thus a valuable method for RNA analyses. Computational approaches to the simulation of folding kinetics suffer from the exponentially large folding space that needs to be evaluated. Here, we present a new approach that combines structure abstraction with evolutionary conservation to restrict the analysis to common parts of folding spaces of related RNAs. The resulting algorithm can recapitulate the folding kinetics known for single RNAs and is able to analyse even long RNAs in reasonable time. Our program RNAliHiKinetics is the first algorithm for the simulation of consensus folding kinetics and addresses a long-standing problem in a new and unique way.

Incentives for Using LEIM in the Investigation of Corrosion Initiation on Organic Coated Alloys

2001 ◽  
Vol 699 ◽  
Author(s):  
S. R. Taylor ◽  
A.M. Mierisch
Keyword(s):  
Electrochemical Impedance ◽  
Numerical Models ◽  
Physical Phenomenon ◽  
Product Formation ◽  
Coated Metal ◽  
Aqueous Environments ◽  
Damage Process ◽  
Experimental Process ◽  
Measurement Artifact ◽  
Insight Into

AbstractLocal electrochemical impedance mapping and spectroscopy (LEIM/S) have become important tools for the investigation of local electrochemical breakdown events associated with the degradation of organically coated metals in aqueous environments. LEIM/S of organic coated metal substrates has revealed local degradation events that are distributed spatially and temporally. These observations provide support to a number of long-standing theories, as well as provide new insight into the damage process. The local changes in impedance observed at early stages of immersion support the presence of virtual pores, while the metastability of impedance peaks representing the local changes provide evidence of healing via corrosion product formation. Each of these are long-standing theories used to explain global electrochemical impedance measurements. This paper will provide an overview of some of the events observed using LEIM and examine these results in the context of recent analytical and numerical models. Models used to predict the electric field above an equipotential disk electrode support the interpretation of most experimental LEI data as being representative of chemical and physical phenomenon and not a result of measurement artifact. However, certain features may be an artifact of the finite nature of the experimental process. The interpretation of LEIM events in view of current experimental and modeling results will be discussed.

Measurement of cortical plate volume based on CBCT of frontal teeth in studies with retrusion and normality

2021 ◽  
pp. 17-21
Author(s):  
N. G. Meskhiya ◽  
I. S. Kopetskiy ◽  
I. A. Nikolskaya ◽  
D. A. Eremin ◽  
O. N. Kovaleva
Keyword(s):  
Orthodontic Treatment ◽  
Soft Tissues ◽  
Three Dimensions ◽  
Cone Beam ◽  
Cortical Plate ◽  
Imaging Method ◽  
New Approach ◽  
Accuracy Of Measurements ◽  
Bone Structures

Cone Beam Computed Tomography (CBCT) is the preferred imaging method for a comprehensive orthodontic examination. Thanks to the development of this technique, clinicians today can make most accurate measurements without fear of errors associated with projection distortion or localization of landmarks on radiographs. The quality of CBCT images gives to orthodontists the ability to analyze bone structures, teeth (even impacted teeth), and soft tissue in three dimensions. The accuracy of measurements of hard and soft tissues from CBCT images determines the accuracy of diagnosis and treatment planning. A fundamentally new approach has been proposed, which makes it possible to thoroughly study the bone tissue surrounding the tooth at the stages of planning orthodontic treatment. Аnalysis of radiation studies of patients with dentoalveolar anomalies was carried out to select the optimal treatment tactics and to control its effectiveness.

An Ecclesiology of Groaning: Augustine, the Psalms, and the Making of Church

2005 ◽  
Vol 66 (1) ◽  
pp. 23-48 ◽  
Author(s):  
Michael C. McCarthy
Keyword(s):  
Biblical Interpretation ◽  
New Approach ◽  
Practice Performance ◽  
The Voice ◽  
Insight Into ◽  
Significant Attention

[The author offers a new approach to Augustine's understanding of Church and exegesis by concentrating on his practice of preaching about the psalms. More than other biblical books, the psalms were conceived not principally as texts to be explained. Rather, they were the “voice of the whole Christ” that gave expression to a wide variety of experiences of the ecclesial body. The practice/performance of Augustine's preaching is itself theologically significant. Attention to the theological dynamics of his biblical interpretation not only suggests the need to revise categories of “exegesis” and “ecclesiology” when speaking about Augustine but also offers insight into a Church that continues to groan under the burden of scandal.]

Charged-particle acceleration and energy loss in laser-produced plasmas

2000 ◽  
Vol 7 (12) ◽  
pp. 5106-5117 ◽  
Author(s):  
D. G. Hicks ◽  
C. K. Li ◽  
F. H. Séguin ◽  
A. K. Ram ◽  
J. A. Frenje ◽  
...  
Keyword(s):  
Particle Acceleration ◽  
Charged Particle ◽  
Energy Loss
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