scholarly journals Gravitational Dispersion Forces and Gravity Quantization

Symmetry ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 40
Author(s):  
Fabrizio Pinto
Keyword(s):  
Gravitational Field ◽  
Quantum Electrodynamics ◽  
Casimir Effect ◽  
Critical Role ◽  
Evolutionary Process ◽  
Point Of View ◽  
Dispersion Forces ◽  
Semiclassical Theory ◽  
Mixed Potentials ◽  
Full Quantum

The parallel development of the theories of electrodynamical and gravitational dispersion forces reveals important differences. The former arose earlier than the formulation of quantum electrodynamics so that expressions for the unretarded, van der Waals forces were obtained by treating the field as classical. Even after the derivation of quantum electrodynamics, semiclassical considerations continued to play a critical role in the interpretation of the full results, including in the retarded regime. On the other hand, recent predictions about the existence of gravitational dispersion forces were obtained without any consideration that the gravitational field might be fundamentally classical. This is an interesting contrast, as several semiclassical theories of electrodynamical dispersion forces exist although the electromagnetic field is well known to be quantized, whereas no semiclassical theory of gravitational dispersion forces was ever developed although a full quantum theory of gravity is lacking. In the first part of this paper, we explore this evolutionary process from a historical point of view, stressing that the existence of a Casimir effect is insufficient to demonstrate that a field is quantized. In the second part of the paper, we show that the recently published results about gravitational dispersion forces can be obtained without quantizing the gravitational field. This is done first in the unretarded regime by means of Margenau’s treatment of multipole dispersion forces, also obtaining mixed potentials. These results are extended to the retarded regime by generalizing to the gravitational field the approach originally proposed by McLachlan. The paper closes with a discussion of experimental challenges and philosophical implications connected to gravitational dispersion forces.

Configurations to Superior Environmental Innovation Strategy: A Both–And Approach

2021 ◽  
pp. 108602662110316
Author(s):  
Tiziana Russo-Spena ◽  
Nadia Di Paola ◽  
Aidan O’Driscoll
Keyword(s):  
Climate Change ◽  
Value Chain ◽  
Critical Role ◽  
Well Being ◽  
Point Of View ◽  
Future Generations ◽  
Innovation Strategy ◽  
Environmental Innovation ◽  
Data Set

An effective climate change action involves the critical role that companies must play in assuring the long-term human and social well-being of future generations. In our study, we offer a more holistic, inclusive, both–and approach to the challenge of environmental innovation (EI) that uses a novel methodology to identify relevant configurations for firms engaging in a superior EI strategy. A conceptual framework is proposed that identifies six sets of driving characteristics of EI and two sets of beneficial outcomes, all inherently tensional. Our analysis utilizes a complementary rather than an oppositional point of view. A data set of 65 companies in the ICT value chain is analyzed via fuzzy-set comparative analysis (fsQCA) and a post-QCA procedure. The results reveal that achieving a superior EI strategy is possible in several scenarios. Specifically, after close examination, two main configuration groups emerge, referred to as technological environmental innovators and organizational environmental innovators.

Creativity from perspective of axiology

2021 ◽  
Vol 92 (2) ◽  
pp. 10-20
Author(s):  
A. V Kiriakova ◽  
◽  
V.V. Moroz ◽  
Keyword(s):  
Evolutionary Process ◽  
Value Orientations ◽  
Point Of View ◽  
Modern World ◽  
Collective Creativity ◽  
The Social ◽  
Wide Range ◽  
Interdisciplinary Knowledge ◽  
Main Components ◽  
The Individual

Interest in creativity as a subject of research has been growing exponentially since the second half of the 20th century in all areas of human history. A wide range of both domestic and foreign studies allows authors to assert that creativity is a personality trait, inherent to one degree or another. Whereas the development of such trait becomes an urgent necessity in the new reality. The entire evolutionary process of the social development illustrates its dependence on personal and collective creativity. The aim of this research is to study the phenomenon of creativity through the perspective of axiology, i.e. the science of values. Axiology allows us to consider the realities of the modern world from the perspective of not only external factors, circumstances and situations, but also of deep value foundations. Creativity has been studied quite deeply from the point of view of psychology: the special characteristics of a creative person, stages of the creative process, the relationship between creative and critical thinking, creativity and intelligence. Some psychologists emphasize motivation, creative skills, interdisciplinary knowledge, and the creative environment as the main components that contribute to the development of creativity. The authors of the article argue that values and value orientations towards cognition, creativity, self-realization and self-expression are the drivers of creativity. In a broad sense, values as a matrix of culture determine the attitude of society to creativity, to the development of creativity of the individual and the creative class, and to how economically successful a given society will be. Since innovation and entrepreneurship are embodied creativity. Thus, the study of creativity from the perspective of axiology combines the need for a deep study of this phenomenon and the subjective significance of creativity in the context of new realities

scholarly journals Normalizability analysis of the generalized quantum electrodynamics from the causal point of view

2017 ◽  
Vol 32 (27) ◽  
pp. 1750165 ◽  
Author(s):  
R. Bufalo ◽  
B. M. Pimentel ◽  
D. E. Soto
Keyword(s):  
Perturbation Theory ◽  
Physical Model ◽  
Gauge Invariance ◽  
Quantum Electrodynamics ◽  
Lorentz Invariance ◽  
Point Of View ◽  
Inductive Method ◽  
S Matrix ◽  
Causal Approach

The causal perturbation theory is an axiomatic perturbative theory of the S-matrix. This formalism has as its essence the following axioms: causality, Lorentz invariance and asymptotic conditions. Any other property must be showed via the inductive method order-by-order and, of course, it depends on the particular physical model. In this work we shall study the normalizability of the generalized quantum electrodynamics in the framework of the causal approach. Furthermore, we analyze the implication of the gauge invariance onto the model and obtain the respective Ward–Takahashi–Fradkin identities.

Subjectivity, Point of View, and Dreaming

2011 ◽  
pp. 159-174
Author(s):  
Gary A. Berg
Keyword(s):  
Los Angeles ◽  
San Francisco ◽  
Formal Education ◽  
Evolutionary Process ◽  
Point Of View ◽  
University Of California ◽  
Educational Environments ◽  
The Subject ◽  
Research In Education ◽  
The University

I come to the subject of this book from a very different path than most of those thinking about the use of computers in educational environments. My formal education focused originally on literature and film studies, and film production at the University of California at Berkeley, San Francisco State University, and the University of California at Los Angeles. I became professionally involved in educational administration through the backdoor of continuing education focused first on the entertainment industry, and then more broadly. It was after this combined experience of studying film and television and working in adult education that I began research in education and earned a doctorate in the field of higher education from Claremont Graduate University, with a special emphasis on distance learning. I hope that the different point of view I have developed from my eclectic background gives me the ability to make something of a unique contribution to this evolving new field. What follows is an attempt to spark a discussion that will lead to answers to the question of what are the most effective techniques for the design of computer learning environments. This is not a how-to book—we are too early in the evolutionary process of the medium to give such specific guidance. Rather, my intention is to offer some theories to elevate the thinking bout computers in education. Because the subject is interdisciplinary, combining science with the humanities, the theoretical discussion draws from abroad range of disciplines: psychology, educational theory, film criticism, and computer science. The book looks at the notion of computer as medium and what such an idea might mean for education. I suggest that the understanding of computers as a medium may be a key to re-envisioning educational technology. Oren (1995) argues that understanding computers as a medium means enlarging human-computer interaction (HCI) research to include issues such as the psychology of media, evolution of genre and form, and the societal implications of media, all of which are discussed here. Computers began to be used in educational environments much later than film, and I would have to agree with others who claim that the use of computers instructionally is still quite unsophisticated.

Tutorial Method

2011 ◽  
pp. 28-38
Author(s):  
Gary A. Berg
Keyword(s):  
Los Angeles ◽  
San Francisco ◽  
Formal Education ◽  
Evolutionary Process ◽  
Point Of View ◽  
University Of California ◽  
Educational Environments ◽  
The Subject ◽  
Research In Education ◽  
The University

I come to the subject of this book from a very different path than most of those thinking about the use of computers in educational environments. My formal education focused originally on literature and film studies, and film production at the University of California at Berkeley, San Francisco State University, and the University of California at Los Angeles. I became professionally involved in educational administration through the backdoor of continuing education focused first on the entertainment industry, and then more broadly. It was after this combined experience of studying film and television and working in adult education that I began research in education and earned a doctorate in the field of higher education from Claremont Graduate University, with a special emphasis on distance learning. I hope that the different point of view I have developed from my eclectic background gives me the ability to make something of a unique contribution to this evolving new field. What follows is an attempt to spark a discussion that will lead to answers to the question of what are the most effective techniques for the design of computer learning environments. This is not a how-to book—we are too early in the evolutionary process of the medium to give such specific guidance. Rather, my intention is to offer some theories to elevate the thinking bout computers in education. Because the subject is interdisciplinary, combining science with the humanities, the theoretical discussion draws from abroad range of disciplines: psychology, educational theory, film criticism, and computer science. The book looks at the notion of computer as medium and what such an idea might mean for education. I suggest that the understanding of computers as a medium may be a key to re-envisioning educational technology. Oren (1995) argues that understanding computers as a medium means enlarging human-computer interaction (HCI) research to include issues such as the psychology of media, evolution of genre and form, and the societal implications of media, all of which are discussed here. Computers began to be used in educational environments much later than film, and I would have to agree with others who claim that the use of computers instructionally is still quite unsophisticated.

Critical Role of Supply Chain Decoupling Point in Mass Customisation from Its Upstream and Downstream Information Systems Point of View

2011 ◽  
pp. 185-196
Author(s):  
S. Saghiri
Keyword(s):  
Supply Chain ◽  
Information Systems ◽  
Critical Role ◽  
Point Of View ◽  
Information Flows ◽  
Mass Customisation ◽  
Different Types ◽  
Type Information ◽  
Different Levels

Concentrating on the role of supply chain decoupling point, this chapter introduces different levels of customisation and mass operations and three types of mass customisation. It argues that in each mass customisation type, information systems which are upstream and downstream of the decoupling point can be varied. Consequently, information flows in different types of mass customisation have been examined. This analysis is an endeavour to organise mass customisation information systems across the supply chain, while it can be a useful structure for future researches in this area as well.

CASIMIR FORCE BETWEEN A GRAVITATIONAL FIELD AND A FINITE OBJECT

2002 ◽  
Vol 11 (10) ◽  
pp. 1567-1572 ◽  
Author(s):  
FABRIZIO PINTO
Keyword(s):  
Gravitational Field ◽  
Casimir Force ◽  
Casimir Effect ◽  
Finite Size ◽  
Zero Point ◽  
Point Energy ◽  
Energy Field ◽  
Static Gravitational Field ◽  
Vacuum Gap ◽  
Infinite Media

In the typical Casimir effect, the boundaries of two semi-infinite media exert a force upon one another across a vacuum gap separating them. In this paper, I argue that a static gravitational field can be regarded as a "soft" boundary which interacts with a test object of finite size through the electromagnetic zero-point-energy field. Therefore, a pressure exists upon a single slab placed in a gravitational field and surrounded by a vacuum. Interestingly, this extremely small Casimir pressure of the gravitational field may cause relative displacements in ground-based sensing microstructures larger than those from astrophysical gravitational waves in macroscopic antennas.

Incorporation of Preferences in an Evolutionary Algorithm Using an Outranking Relation

2011 ◽  
Vol 2 (1) ◽  
pp. 63-85 ◽  
Author(s):  
Eunice Oliveira ◽  
Carlos Henggeler Antunes ◽  
Álvaro Gomes
Keyword(s):  
Evolutionary Algorithm ◽  
Evolutionary Process ◽  
Computational Effort ◽  
Cognitive Effort ◽  
Point Of View ◽  
Electrical Networks ◽  
Technical Parameters ◽  
Outranking Relation ◽  
Electre Tri

The incorporation of preferences into Evolutionary Algorithms (EA) presents some relevant advantages, namely to deal with complex real-world problems. It enables focus on the search thus avoiding the computation of irrelevant solutions from the point of view of the practical exploitation of results (thus minimizing the computational effort), and it facilitates the integration of the DM’s expertise into the solution search process (thus minimizing the cognitive effort). These issues are particularly important whenever the number of conflicting objective functions and/or the number of non-dominated solutions in the population is large. In EvABOR (Evolutionary Algorithm Based on an Outranking Relation) approaches preferences are elicited from a decision maker (DM) with the aim of guiding the evolutionary process to the regions of the space more in accordance with the DM’s preferences. The preferences are captured and made operational by using the technical parameters of the ELECTRE TRI method. This approach is presented and analyzed using some illustrative results of a case study of electrical networks.

Measuring the impact of crises in the horticultural sector: the case of Spain

2019 ◽  
Vol 121 (5) ◽  
pp. 1050-1063 ◽  
Author(s):  
Juan Carlos Pérez-Mesa ◽  
María del Mar Serrano-Arcos ◽  
Raquel Sánchez-Fernández
Keyword(s):  
Empirical Analysis ◽  
Critical Role ◽  
Point Of View ◽  
Strong Impact ◽  
Short Term ◽  
Content Type ◽  
On Demand ◽  
Demand Models ◽  
The Impact ◽  
Practical Implications

PurposeThe purpose of this paper is to review the literature on image crises in the food industry as well as provide a diachronic analysis to distinguish between the varying types of crises that played a critical role in the horticultural sector in recent decades, focussing on the particular case of Spain as the largest horticultural exporter in Europe. This research also analyses the economic impact of these crises upon demand.Design/methodology/approachAn empirical analysis has been conducted using inverse demand models to determine the prospective impact on demand of the image crises in the main European destination markets.FindingsThe empirical analysis reveals an immediate impact upon demand (imports) in the short term. Sector crises invariably have one or many “explosion” points when they reach the public sphere. These events reduce demand among European consumers, ultimately leading to a decrease in imported goods. The tested models revealed considerably significant losses that subsequently reduce annual exports by more than 3 per cent. The analysis also reveals strong effects of complementarity and substitution among the various products that comprise the horticultural supply.Research limitations/implicationsThis study has not taken into account several movements that have also affected the horticultural sector, such as “anti-consumption” and boycotts. Empirical results reveal a strong impact of image crises on demand (imports) in the short term. Consequently, there is an evident need to undertake actions, managed from the supply origin, that reach the consumer and effectively re-establish the prestige of the Spanish production system.Practical implicationsThis paper highlights the importance of the mass media in consumer attitudes and perceptions, and the need to create channels of direct communication to break the information asymmetry between production and consumption areas.Originality/valueThis paper sheds new light on the literature of image crises. The findings of this research have contributed to greater knowledge of how image crises influence demand. From the point of view of management, these results can have practical implications for the highly competitive sector of horticultural production.

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