Guiding Principles

2019 ◽  
pp. 205-258
Author(s):  
Anthony Duncan ◽  
Michel Janssen
Keyword(s):  
Quantum Theory ◽  
Classical System ◽  
Special Role ◽  
Quantum Numbers ◽  
Adiabatic Principle ◽  
Old Quantum Theory ◽  
Underlying Principle ◽  
Guiding Principles ◽  
Action Variables

The development of the complex of assumptions and methods now referred to as the “old quantum theory” mainly took place in the first five years following the introduction of the Bohr atomic model in 1913. Three guiding principles emerged that were used, sometimes in overlapping ways, to explain the flood of spectroscopic data that needed to be explained. First, quantization rules (or conditions) were proposed to single out the allowed orbital motions of electrons in atoms. These rules were derived in various forms by Planck, Sommerfeld, and Wilson, but were put into their most general form by Schwarzschild, who recognized the underlying principle as the quantization of the action variables of a multiply periodic classical system. Second, the special role of the action variables in quantization was given convincing support by the transfer of the adiabatic principle of mechanics to quantum theory (work primarily due to Paul Ehrenfest). Third, the correspondence principle, or statement of asymptotic coincidence of quantum and classical theory in the limit of large quantum numbers, originally introduced by Bohr in 1913 as a supporting argument for his quantization of angular momentum in his theory of the hydrogen atom, was extended by Bohr and Kramers to provide selection rules and approximate intensity predictions evening the regime low quantum numbers.

Subsequent and Subsidiary? Rethinking the Role of Applications in Establishing Quantum Mechanics

2015 ◽  
Vol 45 (5) ◽  
pp. 641-702 ◽  
Author(s):  
Jeremiah James ◽  
Christian Joas
Keyword(s):  
Molecular Structure ◽  
Quantum Mechanics ◽  
Quantum Theory ◽  
Classical Mechanics ◽  
Theory Construction ◽  
Science Pedagogy ◽  
Old Quantum Theory ◽  
The Common ◽  
Complete Quantum

As part of an attempt to establish a new understanding of the earliest applications of quantum mechanics and their importance to the overall development of quantum theory, this paper reexamines the role of research on molecular structure in the transition from the so-called old quantum theory to quantum mechanics and in the two years immediately following this shift (1926–1928). We argue on two bases against the common tendency to marginalize the contribution of these researches. First, because these applications addressed issues of longstanding interest to physicists, which they hoped, if not expected, a complete quantum theory to address, and for which they had already developed methods under the old quantum theory that would remain valid under the new mechanics. Second, because generating these applications was one of, if not the, principal means by which physicists clarified the unity, generality, and physical meaning of quantum mechanics, thereby reworking the theory into its now commonly recognized form, as well as developing an understanding of the kinds of predictions it generated and the ways in which these differed from those of the earlier classical mechanics. More broadly, we hope with this article to provide a new viewpoint on the importance of problem solving to scientific research and theory construction, one that might complement recent work on its role in science pedagogy.

scholarly journals Między geniuszem, rewolucją i matematyką

2021 ◽  
Vol 16 (3) ◽  
pp. 59-67
Author(s):  
Łukasz Mścisławski
Keyword(s):  
Quantum Theory ◽  
Special Relativity ◽  
20Th Century ◽  
Relativity Theory ◽  
Scientific Theories ◽  
Old Quantum Theory ◽  
Special Relativity Theory ◽  
The Revolution

The book written by Wojciech Sady is an interesting and inspiring attempt to reconstruct the mechanism of the revolution that took place in physics at the beginning of the 20th century. As part of the attempts to characterize the process of the emergence of special relativity theory and the old quantum theory, author also raises the issue of the role of genius and imagination in the process of searching for new scientific theories. The work is based on rich factual material, however, has several weaknesses and — as it seems — several places that would not require greater precision. This work aims to identify these points.

Introduction to Volume One

2019 ◽  
pp. 1-42
Author(s):  
Anthony Duncan ◽  
Michel Janssen
Keyword(s):  
Quantum Theory ◽  
Black Body ◽  
Black Body Radiation ◽  
Quantum Model ◽  
Light Quantum ◽  
Quantum Hypothesis ◽  
Specific Heats ◽  
Adiabatic Principle ◽  
Old Quantum Theory ◽  
Energy And Momentum

We provide an overview, as non‐technical as possible, of the contents of Vol. 1 of the book. Reflecting the structure of the volume, this overview consists of two parts. In the first part, we summarize the most important early contributions to quantum theory (covered in detail in Chs. 2–4). This part starts with Planck’s work on black‐body radiation culminating in the introduction of Planck’s constant in 1900. It then moves on to Einstein’s 1905 light‐quantum hypothesis, his theory of specific heats, and his formulas for energy and momentum fluctuations in black‐body radiation. After summarizing Bohr’s path to his quantum model of the atom, it concludes with Einstein’s 1916–17 radiation theory combining elements of Bohr’s model with his own light‐quantum hypothesis. In the second part we summarize our analysis of the old quantum theory (given in detail in Chs. 5–7). After a brief overview of the career of Sommerfeld, who together with Bohr took the lead in developing the old quantum theory, we review the three principles we have identified as the cornerstones of the theory (the quantization conditions, the adiabatic principle, and the correspondence principle). We then discuss three of the theory’s most notable successes (fine structure, Stark effect, X‐ray spectra) and, finally, three of its most notorious failures (multiplets, Zeeman effect, helium).

scholarly journals The historical role of the Adiabatic Principle in Bohr's quantum theory

2016 ◽  
Vol 528 (7-8) ◽  
pp. 530-534
Author(s):  
Blai Pié i Valls ◽  
Enric Pérez
Keyword(s):  
Quantum Theory ◽  
Adiabatic Principle ◽  
Historical Role

Development of Social and Economic Forecasting and Ideas of A. Anchishkin

2013 ◽  
pp. 143-155
Author(s):  
A. Klepach ◽  
G. Kuranov
Keyword(s):  
Economic Planning ◽  
Special Role ◽  
Economic Management ◽  
Economic Forecasting ◽  
Russian Economy ◽  
World Economic ◽  
Long Term Forecasting ◽  
Working Out

The role of the prominent Soviet economist, academician A. Anchishkin (1933—1987), whose 80th birth anniversary we celebrate this year, in the development of ideas and formation of economic forecasting in the country at the time when the directive planning acted as a leading tool of economic management is explored in the article. Besides, Anchishkin’s special role is noted in developing a comprehensive program of scientific and technical progress, an information basis for working out long-term forecasts of the country’s development, moreover, his contribution to the creation of long-term forecasting methodology and improvement of the statistical basis for economic analysis and economic planning. The authors show that social and economic forecasting in the period after 1991, which has undertaken a number of functions of economic planning, has largely relied on further development of Anchishkin’s ideas, at the same time responding to new challenges for the Russian economy development during its entry into the world economic system.

METHODOLOGY OF PLAYING ACTIVITY IN REHABILITATION PRACTICE

2018 ◽  
Vol 28 (7) ◽  
pp. 2543-2548
Author(s):  
Petya Kasnakova
Keyword(s):  
Positive Emotions ◽  
Healing Process ◽  
Disease Process ◽  
Special Role ◽  
Thought Processes ◽  
Active Involvement ◽  
Movement Skills ◽  
Movement Training ◽  
Motor Movement

The games play a special role in rehabilitation practice. The positive emotions they cause in patients cannot be achieved by other methods and means of modern rehabilitation. The role of game playing activity in practice is crucial to the achievement of one of the important tasks in implementing rehabilitation measures, namely to evacuate the patient from the depressed mental state, to distract him from the disease process and to focus on mobilizing his healing powers. The mood, the emotional charge and the dynamics that the games create are particularly suited to awakening the patient's interest in the healing process, their attraction and their active involvement in the rehabilitation activities. The connection between the actions in the game and the movements in the analytical exercises accelerates the formation of motor habits, physical qualities and skills not only in children but also in adult patients with various pathological injuries. Rehabilitation games are suitable for all ages by enhancing the health of the occupants, developing their mental qualities, improving the activity of the vestibular, visual and motor analyzers. The basis of the motor movement training game methodology and the improvement of motor movement skills is the activation of the thought processes and emotional experiences, the development of the functions of the musculoskeletal system, the cardiovascular system and the respiratory system.

РОЛЬ КНИГИ В ВОСПИТАНИИ ПОЛИКУЛЬТУРНОЙ ЛИЧНОСТИ

2020 ◽  
pp. 58-60
Author(s):  
Замира Сейткожоева
Keyword(s):  
Computer Games ◽  
Human Life ◽  
Interpersonal Relationship ◽  
Special Role ◽  
Multicultural Personality ◽  
Younger Age ◽  
Bibliographic Data ◽  
Life Education ◽  
Different Cultures

Аннотация: В статье обращено внимание на исключительную роль книги в жизни человека, воспитание молодежи. Книга сопровождает человека всю жизнь. Однако в последние годы замечается снижение интереса к чтению книг. Отдается предпочтение компьютеру, играм, телевизору, слушанию музыки через наушники. Во избежание деградации личности, в воспитании грамотной, гуманной, толерантной личности необходимо приучать подрастающее поколение к вдумчивому чтению книг. Значительное место в развитии личности занимает внеклассное чтение, к которому нужно прививать интерес еще во время учебы в младшем возрасте. В мире особая роль принадлежит межличностным отношениям, формированию такой личности, которая могла бы жить в согласии с носителями разных культур. Для формирования поликультурной личности важная роль принадлежит культурному наследию, основу которого составляют книги. Ключевые слова: роль книги, гуманная личность, толерантная личность, библиографические материалы, указатели библиографических данных, справочная литература, поликультурная личность, внеклассное чтение, информатизация, интерес к чтению. Аннотация: Макалада адамдын жашоосундагы жаштарды тарбиялоодогу китептин өзгөчө мааниси, ролуна өзгөчө көңүл бурулган. Бир эле мезгилде, соңку жылдарда китептерибизге болгон адамдардын кызыгууларды төмөндөп бараткандыгы байкалган.Учурда поли- же ар кандай оюндарга, телевизор көрүүгө, кулакчын аркылуу модалуу музыка угууга, артыкчылык берилип жатат. Билимдүү, гумандуу толеранттуу инсанды тарбиялап чыгууга да, анын деградацияга кабылышынан сактап калыш үчүн, өсүп келе жаткан муундарды өзүнүн айкалыштыра алуусу менен китептерди берилип жана ой жүгүртүп алууга үйрөтүү- өтө зарыл талап болуп эсептелет. Инсандын онүгүндө окуудан тышкаркы окуунун маанилүү орду бар. Мындай окууга буга кызыгуусун өркүндөтүүнун башталгыч каласстардан тарта үйрөтүү абзел. Инсандар аралык байланыштар дүйнөдө өзгөчө орун ээлейт, алар башка маданий өкүлдөрү менен макулдуктулукта жашоого даяр. Полимаданиятту инсандын калыптанышына ар маданияттын мурасы өтө чоң ролду ойнойт, анын негизин китептер түзөт. Түйүндүү сөздөр: китептин мааниси жана ролу, гумандуу инсан, толеранттуу инсан, библиографиялык материалдар, библиографиялык маалыматтарды көрсөтүү сурантыла билүү адабияты, полимаданиятуу инсан, окуудан тышкаркы окуу,маалымдуулук, окууга кызыгуу The article draws attention to the exceptional role of the book in human life, education of young people. The book accompanies a person all his life. However, in recent years, there has been a decline in interest in reading books. Preference is given to a computer, games, TV, listening to music through headphones. In order to avoid degradation of the personality, it is necessary to accustom the younger generation to thoughtful reading of books. a significant place in the development of personality takes extracurricular reading, to which you need to instill interest even while studying at a younger age. In the world a special role belongs to interpersonal relationship, the formation of such a personality, who could live in harmony with speakers of different cultures. To form a multicultural personality an important role belongs to cultural heritage, the basis of which are books Keywords: the role of the book, humane personality, tolerant personality, bibliographic materials, indexes of bibliographic data, reference literature, multicultural personality, extracurricular reading, informatization, interest in reading.

Diet and Nutritional Interventions with the Special Role of Myo-Inositol in Gestational Diabetes Mellitus Management. An Evidence-Based Critical Appraisal

2019 ◽  
Vol 25 (22) ◽  
pp. 2467-2473 ◽  
Author(s):  
Enrique Reyes-Muñoz ◽  
Federica Di Guardo ◽  
Michal Ciebiera ◽  
Ilker Kahramanoglu ◽  
Thozhukat Sathyapalan ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Metabolic Diseases ◽  
Nutritional Intervention ◽  
Attractive Alternative ◽  
Special Role ◽  
Dose Frequency ◽  
Nutritional Interventions

Background: Gestational Diabetes Mellitus (GDM), defined as glucose intolerance with onset or first recognition during pregnancy, represents one of the most common maternal-fetal complications during pregnancy and it is associated with poor perinatal outcomes. To date, GDM is a rising condition over the last decades coinciding with the ongoing epidemic of obesity and Type 2 Diabetes Mellitus (T2DM). Objective: The aim of this review is to discuss the role of diet and nutritional interventions in preventing GDM with the explanation of the special role of myo-inositol (MI) in this matter. Methods: We performed an overview of the most recent literature data on the subject with particular attention to the effectiveness of diet and nutritional interventions in the prevention of GDM with the special role of MI. Results: Nutritional intervention and physical activity before and during pregnancy are mandatory in women affected by GDM. Moreover, the availability of insulin-sensitizers such as different forms of inositol has dramatically changed the scenario, allowing the treatment of several metabolic diseases, such as those related to glucose dysbalance. Although the optimal dose, frequency, and form of MI administration need to be further investigated, diet supplementation with MI appears to be an attractive alternative for the GDM prevention as well as for the reduction of GDM-related complications. Conclusion: More studies should be conducted to prove the most effective nutritional intervention in GDM. Regarding the potential effectiveness of MI, further evidence in multicenter, randomized controlled trials is needed to draw firm conclusions.

The Role of Lipids and Membranes in the Pathogenesis of Alzheimer's Disease: A Comprehensive View

2018 ◽  
Vol 15 (13) ◽  
pp. 1191-1212 ◽  
Author(s):  
Botond Penke ◽  
Gábor Paragi ◽  
János Gera ◽  
Róbert Berkecz ◽  
Zsolt Kovács ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Signaling Pathways ◽  
Membrane Lipids ◽  
Specific Protein ◽  
Dietary Factors ◽  
Lipid Signaling ◽  
Special Role ◽  
Aβ Peptides

Lipids participate in Amyloid Precursor Protein (APP) trafficking and processing - important factors in the initiation of Alzheimer’s disease (AD) pathogenesis and influence the formation of neurotoxic β-amyloid (Aβ) peptides. An important risk factor, the presence of ApoE4 protein in AD brain cells binds the lipids to AD. In addition, lipid signaling pathways have a crucial role in the cellular homeostasis and depend on specific protein-lipid interactions. The current review focuses on pathological alterations of membrane lipids (cholesterol, glycerophospholipids, sphingolipids) and lipid metabolism in AD and provides insight in the current understanding of biological membranes, their lipid structures and functions, as well as their role as potential therapeutic targets. Novel methods for studying the membrane structure and lipid composition will be reviewed in a broad sense whereas the use of lipid biomarkers for early diagnosis of AD will be shortly summarized. Interactions of Aβ peptides with the cell membrane and different subcellular organelles are reviewed. Next, the details of the most important lipid signaling pathways, including the role of the plasma membrane as stress sensor and its therapeutic applications are given. 4-hydroxy-2-nonenal may play a special role in the initiation of the pathogenesis of AD and thus the “calpain-cathepsin hypothesis” of AD is highlighted. Finally, the most important lipid dietary factors and their possible use and efficacy in the prevention of AD are discussed.

Fundamentality

2017 ◽  
Author(s):  
Richard Healey
Keyword(s):  
Quantum Theory ◽  
High Energy Physics ◽  
Physical Property ◽  
Natural World ◽  
High Energy ◽  
Quantum Field Theories ◽  
Fundamental Physics ◽  
The World ◽  
Energy Physics

The metaphor that fundamental physics is concerned to say what the natural world is like at the deepest level may be cashed out in terms of entities, properties, or laws. The role of quantum field theories in the Standard Model of high-energy physics suggests that fundamental entities, properties, and laws are to be sought in these theories. But the contextual ontology proposed in Chapter 12 would support no unified compositional structure for the world; a quantum state assignment specifies no physical property distribution sufficient even to determine all physical facts; and quantum theory posits no fundamental laws of time evolution, whether deterministic or stochastic. Quantum theory has made a revolutionary contribution to fundamental physics because its principles have permitted tremendous unification of science through the successful application of models constructed in conformity to them: but these models do not say what the world is like at the deepest level.

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