scholarly journals Discrepancy between Power Radiated and the Power Loss Due to Radiation Reaction for an Accelerated Charge

Symmetry ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 1833
Author(s):  
Ashok K. Singal
Keyword(s):  
Power Loss ◽  
Radiation Reaction ◽  
The Self ◽  
Constant Acceleration ◽  
Retarded Time ◽  
Poynting Flux ◽  
Radiated Power ◽  
Electromagnetic Power ◽  
The Difference ◽  
Accelerated Charge

We examine here the discrepancy between the radiated power, calculated from the Poynting flux at infinity, and the power loss due to radiation reaction for an accelerated charge. It is emphasized that one needs to maintain a clear distinction between the electromagnetic power received by distant observers and the mechanical power loss undergone by the charge. In the literature, both quantities are treated as almost synonymous; the two in general could, however, be quite different. It is shown that in the case of a periodic motion, the two formulations do yield the power loss in a time averaged sense to be the same, even though, the instantaneous rates are quite different. It is demonstrated that the discordance between the two power formulas merely reflects the difference in the power going in self-fields of the charge between the retarded and present times. In particular, in the case of a uniformly accelerated charge, power going into the self-fields at the present time is equal to the power that was going into the self-fields at the retarded time plus the power going in acceleration fields, usually called radiation. From a study of the fields in regions far off from the time retarded positions of the uniformly accelerated charge, it is shown that effectively the fields, including the acceleration fields, remain around the ‘present’ position of the charge which itself is moving toward infinity due to its continuous constant acceleration, with no other Poynting flow that could be termed as ‘radiation emitted’ by the charge.

I Like Her, Because I Like Myself: Self-Evaluation as a Source of Interpersonal Attitudes

2003 ◽  
Vol 50 (4) ◽  
pp. 239-246 ◽  
Author(s):  
Eva Walther ◽  
Claudia Trasselli
Keyword(s):  
Opposite Effect ◽  
Learning Phase ◽  
The Self ◽  
Attitude Formation ◽  
Formation Processes ◽  
False Feedback ◽  
Self Evaluation ◽  
Evaluation Group ◽  
Group A ◽  
The Difference

Abstract. Two experiments tested the hypothesis that self-evaluation can serve as a source of interpersonal attitudes. In the first study, self-evaluation was manipulated by means of false feedback. A subsequent learning phase demonstrated that the co-occurrence of the self with another individual influenced the evaluation of this previously neutral target. Whereas evaluative self-target similarity increased under conditions of negative self-evaluation, an opposite effect emerged in the positive self-evaluation group. A second study replicated these findings and showed that the difference between positive and negative self-evaluation conditions disappeared when a load manipulation was applied. The implications of self-evaluation for attitude formation processes are discussed.

Kunst als reflexive Form und als reflektierende Bewegung

2010 ◽  
Vol 55 (2) ◽  
pp. 75-86
Author(s):  
Brigitte Hilmer
Keyword(s):  
Propositional Content ◽  
The Self ◽  
Aesthetic Judgement ◽  
The Difference ◽  
Self Reference

Kunst kann dann als reflexiv interpretiert werden, wenn Reflexivität nicht auf propositionalen Gehalt oder sogar sprachliche Artikulation angewiesen ist. Reflexion tritt auf in den Modi der Selbstbeziehung des Lebendigen, des Überlegens und der Selbstreferenz im Symbolischen. Kunst ist ein Reflexionsmedium, das diese Modi beansprucht und miteinander verflicht. Eine spezifisch ästhetische Reflexivität ist von und nach Kant nach dem Vorbild der transzendentalen Reflexion und in Konkurrenz zu ihr etabliert worden. Sie läßt sich als Reflexivität des ästhetischen Urteils, als emphatisches Gemachtsein, als Rückwendung auf Wahrnehmungsvollzüge oder als Begriffsreflexion verstehen. Dabei wird die Unterscheidung von Anschauung und Verstand in deren Zusammenspiel oder Abspaltung vorausgesetzt. Von der Analogie zur transzendentalen Reflexion löst sich aber erst ein Verständnis von ästhetischer Reflexivität, das von den drei Modi und ihrer Verflechtung ausgeht.<br><br>Reflexivity does not presuppose linguistic articulation or even propositional content. If it did, art could not be called reflexive. Reflexivity can be found in the self-contact of the living, in mental reflection or in symbolic self-reference. Art is a medium which claims these different modes of reflexivity and intertwines them. Aesthetic reflexivity as such has been established by Kant and his epigones, following the model of transcendetal reflection. Thus it could be specified as the reflexive structure of aesthetic judgement, or as an emphasis on a work’s being created, or as a reference to perception itself in the process of perceiving, or as a way of reflecting concepts. Aesthetic reflexivity can only be detached from the model of transcendental reflection, if it is seen as oriented towards the interaction among the three modes of reflection mentioned above, leaving aside the difference, interplay or competition between perception and conceptual capacities.

scholarly journals On the self-induction of electric currents in a thin anchor-ring

1912 ◽  
Vol 86 (590) ◽  
pp. 562-571 ◽  
Keyword(s):  
Cross Section ◽  
Circular Cross Section ◽  
The Self ◽  
Electric Currents ◽  
Fourth Term ◽  
Starting Point ◽  
Axis Of Symmetry ◽  
The Difference ◽  
Circular Axis ◽  
Mutual Induction

In their useful compendium of "Formulæ and Tables for the Calculation of Mutual and Self-Inductance," Rosa And Cohen remark upon a small discrepancy in the formulæ given by myself and by M. Wien for the self-induction of a coil of circular cross-section over which the current is uniformly distributed . With omission of n , representative of the number of windings, my formula was L = 4 πa [ log 8 a / ρ - 7/4 + ρ 2 /8 a 2 (log 8 a / ρ + 1/3) ], (1) where ρ is the radius of the section and a that of the circular axis. The first two terms were given long before by Kirchhoff. In place of the fourth term within the bracket, viz., +1/24 ρ 2 / a 2 , Wien found -·0083 ρ 2 / a 2 . In either case a correction would be necessary in practice to take account of the space occupied by the insulation. Without, so far as I see, giving a reason, Rosa and Cohen express a preference for Wien's number. The difference is of no great importance, but I have thought it worth while to repeat the calculation and I obtain the same result as in 1881. A confirmation after 30 years, and without reference to notes, is perhaps almost as good as if it were independent. I propose to exhibit the main steps of the calculation and to make extension to some related problems. The starting point is the expression given by Maxwell for the mutual induction M between two neighbouring co-axial circuits. For the present purpose this requires transformation, so as to express the inductance in terms of the situation of the elementary circuits relatively to the circular axis. In the figure, O is the centre of the circular axis, A the centre of a section B through the axis of symmetry, and the position of any point P of the section is given by polar co-ordinates relatively to A, viz.

Effect of Nursing Measures Based on Self-Efficacy Theory on State Self-Esteem of Breast Cancer Patients

2021 ◽  
Vol 7 (6) ◽  
pp. 6469-6476
Author(s):  
Li Qiu ◽  
Hongli Wang ◽  
Yuan Yuan ◽  
Ying Wang ◽  
Ping Yu
Keyword(s):  
Breast Cancer ◽  
Cancer Patients ◽  
Self Efficacy ◽  
Self Esteem ◽  
The Self ◽  
Control Group ◽  
Observation Group ◽  
Breast Cancer Patients ◽  
Functional Exercise ◽  
The Difference

To analyze the effect of nursing measures based on self-efficacy theory on the state self-esteem of breast cancer patients. 110 breast cancer patients who were treated in our hospital from October 2018 to October 2019 were randomly divided into control group and observation group. The control group was given routine nursing measures, and the observation group was given nursing measures under the guidance of self-efficacy theory. Before operation, 1 week after operation and 3 months after operation, the general data of the two groups before and after treatment were recorded. The self-efficacy level and self-esteem level of the patients before and after treatment were assessed by the self-efficacy scale (GSEs) and state self-esteem scale (SSEs). The compliance of functional exercise and shoulder joint activity (ROM) of the two groups were compared, and the physical status of the two groups were analyzed. To analyze the effect of nursing measures based on self-efficacy theory on the state self-esteem of breast cancer patients. The GSEs score of the two groups increased with the time, and there was no significant difference between the two groups before operation (P > 0.05). After 1 week and 3 months, the GSEs score of the observation group was significantly higher than that of the control group (P < 0.05). The compliance evaluation table of functional exercise in the two groups increased with the time, and the compliance evaluation table of functional exercise in the observation group was significantly higher than that in the control group, the difference was statistically significant (P < 0.05). ROM of the two groups increased with time, and ROM of the observation group was significantly better than that of the control group, the difference was statistically significant (P < 0.05). The self-esteem level of the two groups increased with time, and the self-esteem level of the observation group was significantly higherthan that of the control group, the difference was statistically significant (P <0.05). The nursing measures under tne guidance of self-efficacy theory can help patients to complete functionalexercise, improve theirquality of life, improve their self-esteem level, a nd can be widely used in clinical practice.

International Law and its Impact on The Hijaz

The Hijaz ◽  
2018 ◽  
pp. 155-204
Author(s):  
Malik R. Dahlan
Keyword(s):  
Legal Status ◽  
The Self ◽  
Self Determination ◽  
Holy See ◽  
The Status ◽  
Unique Approach ◽  
The Difference ◽  
Nuanced Understanding ◽  
The Right ◽  
The Impact

Chapter 6 is an international legal examination of the status of The Hijaz in the aftermath of its conquest and absorption into a Saudi personal union. It discusses the impact of the 1933 Montevideo Convention on the Rights and Duties of States as well as the Territorial Principle. The Chapter tackles the legal question of secession and warns against the pitfalls of the ‘Self-Determination Trap’. It draws lessons from the difference between involuntary extinction of states as opposed to their creation. By looking at the cases of Czechoslovakia and Quebec it tackles the issue of ‘the Right to Secession by Agreement’. The Chapter reflects on lessons from Scotland, Catalan and Kurdistan highlighting that The Hijaz presents us with a delicate and nuanced understanding of ‘Internal Self-Determination’ and ‘Autonomy’ establishing, de facto, an international legal status of “Self-Determination Spectrum Disorder”. A special status calls for an active and special legal solution. The notion of a broader integrative role for The Hijaz and the broader Islamic world. The potential integrative institutionalization of The Hijaz is investigated bringing to bare a unique approach to self-determination that would entail coupling autonomy with international territorial administration. The propositions under this Chapter are supported by looking at other sui generis entities such as the Holy See being sovereigns without being states.

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