scholarly journals The passage of positive ions through gases

A large number of investigations have been carried out on the motion of charged particles through gases, and the subject has received added impetus from the introduction of quantum mechanics, as this theory is capable of dealing with collision phenomena in a manner that was beyond the reach of Bohr’s quantum theory. In the early days of the wave theory, many experiments were devised with a view to testing the validity of the theory; but now the foundations of quantum mechanics have been so firmly laid that we may use the theory to clarify the more complicated phenomena observed in the passage of charged particles through gases. Both from the experimental and theoretical point of view the most convenient particles to study are electrons; and, as a consequence, the phenomena observed in the collisions of electrons with gas molecules are well known and to a large extent understood. Well-marked diffraction phenomena have been observed and the relative probabilities of elastic and inelastic collisions measured for a number of gases. Although detailed theoretical explanations have not always been given, it is possible in nearly all cases to give a general description of the main processes contributing to the observed effects. For example, the Ramsauer effect is now completely explained.

Bastina ◽  
2020 ◽  
pp. 95-109
Author(s):  
Đurđina Isić

The paper presents the results of research that included comparative study of the place and role of female characters in selected and representative comedies by Serbian comedigrapher Branislav Nušić (eng. MP, Suspicious person, Mrs Minister, Bereaved family, Dr, Deceased; srb. Narodni poslanik, Sumnjivo lice, Ožalošćena porodica, Dr, Pokojnik, Vlast) and Bulgarian comedigrapher Stefan Kostov (eng. Gold mine, Golemanov, Grasshoppers, Nameless comedy; blg. Zlamnama mina, Golemanov, Skakalci, Komediâ bez ime) in order to find similarities and differences in the process of comedigraphic shaping of female characters in the work of these two authors. The subject of the research was viewed primarily from a literary-theoretical point of view, and the dominant methods of study were comparative and analytical-synthetic. During the research, there was a differentiation of female characters in accordance with their motivational structures, psychological assemblies and the nature of the place and the role they play in the social environment in which they are located. Therefore, we can distinguish female characters who live in the province and who are fully representative of the small-town spirit, female characters who live in the capital and are a symbol of the modern age and female characters who dwell in the capital, but in fact, deeply down still carry a small-town view of the world. The structure of this paper is in line with this distinction. Conclusions made at the end of the study show that the representation of female characters in analyzed comedies of both comedigaphers is highly similar in its nature.


Author(s):  
Lilia Ana Sandoval Pineda ◽  
Jorge Enrique Quevedo Reyes

El artículo tiene como objetivo presentar la actualidad de la evaluación formativa en el tema de diseño bases de datos para entornos virtuales, en donde se mencionan las plataformas virtuales con sus estrategias de evaluación convencional para áreas afines con la ingeniería. Entre los principales aspectos en que se centra la revisión de la literatura esta la taxonomía de Bloom, entornos virtuales, plataformas y evaluación formativa. Desde el punto de vista teórico se centra en el tema de diseño de las bases de datos, las metodologías de evaluación y las diferentes alternativas para ambientes virtuales, enfatizando en los recursos y formas como se afrontan en la actualidad. También se tiene en cuenta el papel del estudiante y del docente en el proceso de evaluación y realimentación del aprendizaje. Luego de experimentar y evaluar desde el punto de vista evaluación formativa, tanto las plataformas estándar, como también los proyectos desarrollados por institutos y universidades, se concluye que las plataformas ni siquiera tienen en cuenta este tipo de evaluación y los resultados obtenidos por proyectos particulares no son suficientes para cubrir un proceso real y completo de este tipo de evaluación.Palabras Clave: Entorno Virtual, Evaluación formativa, Diseño de base datos.This article aims to present the current of formative assessment for the subject of database design for virtual environments where virtual platforms mentioned with conventional assessment strategies for areas related to engineering. Among the main issues focused review of the literature is Bloom's taxonomy, virtual environments, platforms, and educational assessment. From the theoretical point of view focuses on the design theme of the databases, assessment methodologies and the different alternatives for virtual environments, emphasizing resources and forms as encountered today. It also takes into account the role of the student and the teacher in the process of assessment and feedback of learning. After experimenting and evaluating from the point of view formative assessment, both standard platforms, as the projects developed by colleges and universities, it is concluded that the platforms do not even take into account this type of assessment and the results obtained for particular projects, not sufficient to cover actual and complete a process of this type of assessment.Keywords: Virtual Environment, formative evaluation, Designed data base


Author(s):  
Alexia Auffèves ◽  
Philippe Grangier

We develop the point of view where quantum mechanics results from the interplay between the quantized number of ‘modalities’ accessible to a quantum system, and the continuum of ‘contexts’ that are required to define these modalities. We point out the specific roles of ‘extracontextuality’ and ‘extravalence’ of modalities, and relate them to the Kochen–Specker and Gleason theorems. This article is part of a discussion meeting issue ‘Foundations of quantum mechanics and their impact on contemporary society’.


2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Walter Vesperi ◽  
Marzia Ventura ◽  
Concetta Lucia Cristofaro

Purpose The purpose of this paper is twofold. The first objective is to outline the main theoretical framework on the conflict style phenomenon; the second purpose is to understand the conflict style in a sample of Medical Health Manager. Design/methodology/approach The authors based this research on qualitative-quantitative analysis. This study starts with a survey questionnaire as a method to collect quantitative data. Therefore, the authors conducted a survey on the style of conflict management of hospital managers with subordinates. A modified version of the Rahim Organizational Conflict Inventory II (ROCI II) (Rahim, 1983) – Module B is used. This instrument is composed of 28 entries. Findings The results of this study offer a double perspective. From a theoretical point of view, the results highlight the main theoretical references related to conflict management. In particular, the main currents of study and the results of empirical evidence have been identified within organizational theory. The empirical part of this study, instead, offers a survey, carried out through the administration of the ROCI II – module B questionnaire. Originality/value This paper offers interesting food for thought on conflict management. In particular, it offers theoretical references on the subject and on the validation of the ROCI II - Form B model, in health organizations.


1920 ◽  
Vol 57 (7) ◽  
pp. 290-299
Author(s):  
R. H. Rastall

AT the present time most mining geologists appear to be in general agreement on the principle that primary ore-deposits are derived from igneous magmas. Furthermore, it is now almost universally recognized that the segregation and concentration of the metals and their compounds into payable ore-deposits is but part of a larger and more fundamental problem, namely, the differentiation of the igneous rocks, a problem which has exercised the ingenuity of petrologists for many years past and is still by no means solved. Unfortunately most of the speculations and theories put forward in explanation of these phenomena are in the main founded on facts and inferences derived from the study of the silicates; comparatively few petrologists have taken into account the behaviour of the oxidic and sulphidic compounds of the useful metals, which are commonly regarded in the light of rare and accidental constituents of the magma, rather than as having any particular bearing on the point at issue. The most notable exception to this general statement is Vogt, whose work on slags and ore-deposits is of an epoch-making character from the theoretical point of view, as well as of immense practical importance in smelting and blast-furnace practice. However, within the last few years great attention has been devoted by mining geologists to the subject of the genesis of ore-deposits, mainly because of its bearing on the question of persistence in depth or the replacement at lower levels of one ore by another, such as is known to occur in certain cases. It may be suggested, therefore, that the time has now come when it may be possible to attempt to combine the facts hitherto discovered along different lines of research into a coherent whole.


2014 ◽  
Vol 1 (2) ◽  
pp. 171-196 ◽  
Author(s):  
Tor Arne Haugen ◽  
Hans-Olav Enger

This paper deals with a classical problem in Scandinavian grammar, so-called ‘pancake sentences’, nicknamed after examples like Pannekaker er godt ‘Pancakes are good’ where there seemingly is disagreement between the plural subject and the predicative adjective in the neuter singular. Our aim is twofold. From the theoretical point of view, we shall argue that there are advantages with a construction-based approach, and that such an approach is superior to previous analyses within various generative frameworks.The main reason for this is that the data require generalizations over combinations of subjects and predicative adjectives at a rather specific level. From a more empirical point of view, we shall argue that Scandinavian displays a range of different, but related pancake constructions. For the first time, corpus data are brought into the debate. We show that a construction type that has not received much attention previously is in fact the most frequent type, namely constructions where the subject is a deverbal noun.


2021 ◽  
Vol 13 (15) ◽  
pp. 8349
Author(s):  
Paula Benevene ◽  
Ilaria Buonomo ◽  
Eric Kong ◽  
Martina Pansini ◽  
Maria Luisa Farnese

This paper presents a systematic, evidence-based review of Green Intellectual Capital (GIC) management, a construct first introduced in 2008 and increasingly recognized as a management concept in recent years. This review covers the literature on GIC from 2008 to 2020 and addresses the role played by intellectual capital as a framework to promote sustainability in organizations. With the aim of clarifying our knowledge on the application of the GIC paradigm, this paper reviews the findings on the outcomes achieved by organizations that adopt the GIC paradigm, the antecedents and possible mediation-moderation factors that enhance this process, and the contexts in which such outcomes emerge. Findings show that GIC offers a significant framework for promoting sustainability in organizations. However, even though this study underlines the increasing trend of GIC, there remains very little reliable data on the subject, particularly addressing the role played by GIC as a framework to promote sustainability in organizations. This literature review is valuable for both researchers and practitioners. From a theoretical point of view, it allows one to synthesize the outcomes of GIC to better delineate how it affects organizations and the environment. From a practical point of view, opening a debate about the actual outcomes of GIC allows one to overcome the theory–practice divide, making the value of GIC more accessible to practitioners and managers and pushing them to opt for a green shift in their organizations.


Author(s):  
Demerval Rogério Masotti

O construto autoeficácia está relacionado às crenças desenvolvidas pelos indivíduos em relação às ações que confiam poder realizar com sucesso em áreas específicas. É também de grande relevância nos processos de autorregulação dos sujeitos, sendo tais conceitos analisados em diferentes contextos, dentre eles o ambiente educacional, com o propósito de avaliar o comportamento dos estudantes diante dos desafios escolares. A evasão escolar é outro importante aspecto que merece destaque nos processos de avaliação institucional na área de educação, em virtude das consequências sociais, acadêmicas e econômicas. Assim, o presente estudo objetivou investigar conceitos referentes à autoeficácia e à autorregulação acadêmica, a fim de verificar se esses fatores contribuem para prever a evasão escolar, e auxiliar no planejamento de intervenções que possibilitem minimizar a evasão dos alunos. As análises indicaram que tanto a autoeficácia quanto a autorregulação acadêmica tratam-se de variáveis significativas, sendo que, do ponto de vista teórico, representam importantes preditores para a evasão dos estudantes. Portanto, o propósito da pesquisa foi alcançado, mas devido às limitações deste estudo que se baseou apenas em fontes bibliográficas, recomenda-se a realização de novas investigações que contemplem pesquisas de campo em diferentes instituições de ensino, a fim de aprofundar a compreensão sobre o assunto. Palavras-chave: Autoeficácia. Autorregulação Acadêmica. Evasão Escolar. SELF-EFFICACY AND ACADEMIC SELF-REGULATION CONTRIBUTING TO PREDICTIONOF THE ESCOLAR EVASION Abstract: The self-efficacy construct is related to beliefs developed by individuals in relation to the actions that trust can perform successfully in specific areas, it is also of great importance in the processes of academic self-regulation of the people, these concepts have been analyzed in different contexts, including the environment educational, in order to evaluate the behavior of students facing school challenges. The school evasion is another important aspect that deserves attention in institutional assessment processes in the education area, because of the social, academic and economic consequences. Thus, the present study aimed to investigate concepts related to self-efficacy and academic self-regulation to verify if these factors contribute to predict school evasion, and assist in planning interventions that enable minimize the evasion of the students. The analysis indicated that both self-efficacy and academic self-regulation are significant variables, and the theoretical point of view is important predictor for school evasion. Therefore, the purpose of the study was achieved, but due to the limitations of this study that was based only on literature sources, it is recommended to conduct further investigations that include field research in different educational institutions, to deepen understanding about the subject. Keywords: Self-Efficacy. Academic Self-Regulation. School Evasion.


2018 ◽  
Vol 67 (4) ◽  
pp. 451-463
Author(s):  
Stefano Fuselli

Il morbo di Alzheimer è una patologia i cui effetti non sono dirompenti solo sul piano pratico, per i pazienti e i loro familiari o per il sistema socio-assistenziale, ma anche sul piano concettuale. Esso infatti mette a dura prova le correnti nozioni di identità e autonomia del soggetto, con notevoli conseguenze, prima ancora che sul piano pratico, sul piano teorico. Muovendo dal dibattito bioetico attuale, questo contributo intende portare allo scoperto quanto nel dramma dell’Alzheimer si manifesta circa la nozione di identità e di autonomia. La prospettiva prescelta non è pratica ma è teoretica, volta cioè non tanto al da-farsi ma al da-guardarsi. ---------- The effects of Alzheimer’s Disease are disruptive on a practical level for patients and their families as well as for the healthcare system. They are also disruptive on a conceptual level, because they challenge the current notions of identity and autonomy of the subject. The consequences are relevant first and foremost from a theoretical point of view rather than from a practical one. By considering the present debate in bioethics, this contribution aims to shed light on what AD can reveal about the notions of identity and autonomy. The perspective is a theoretical rather than a practical one, because it focuses on what has to be looked at rather than on what has to be done.


2015 ◽  
Vol 5 (6) ◽  
pp. 151
Author(s):  
Narmina Fataliyeva Arif

<p>Today in a globalized society the need for word substitutions while speaking on sensitive topics has increased. People search for milder alternatives to express their opinions whenever they feel their words might sound abrupt or offensive. These substitutions are called euphemisms.</p><p>At first sight one might suppose that these expressions are too ordinary, but in fact they possess a strong persuasive character. Thus, the subject of this article is to identify the main functions of euphemisms in modern society. The article also aims at determining which social and cognitive factors regulate our choice of these substitutions.</p><p>In the theoretical part of the research different views on the phenomenon are outlined.</p><p>The main method used in this work is descriptive analytical method, based on the description of euphemisms from theoretical point of view with the subsequent analysis of achieved results. Besides, the method of contextual analysis has been applied.</p><p>As data for analysis different euphemistic expressions have been studied.</p><p>An overall study shows that in modern life honest debate has turned into a rare phenomenon.</p><p>One of our assertions is that the use of euphemisms primarily presupposing good intentions so as not to hurt a listener’s feelings, in modern life has acquired completely a different purpose. Today people use euphemisms to sound more persuasive instead of simply sounding polite.</p><p>It should be noted that for a deeper understanding of the role of euphemisms they should be studied within a specific discourse. Thus this study will require a further look at the problem applying a more contextual approach to its analysis.</p>


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