The Role of the Site Sizes in Hydridation of Laves Phases (C14)

2002 ◽  
Vol 2002 (12) ◽  
pp. 620-621
Author(s):  
Mustapha Boulghallat ◽  
Ahmed Jouaiti ◽  
Norbert Gerard
Keyword(s):  
Intermetallic Compound ◽  
Experimental Studies ◽  
New Materials ◽  
Laves Phases ◽  
Basic Criterion ◽  
The Subject ◽  
Good Agreement ◽  
Nickel Cadmium

New materials, especially AB2 substituted compounds are able to form reversible hydrides and are good candidates to substitute the cadmium in rechargeable nickel–cadmium batteries. These systems have been the subject of several theoretical and experimental studies, particularly concerning the reaction between hydrogen and the Laves phases(C14) containing zirconium. We have shown previously that the A2B2 site size is the basic criterion which allows manipulation of the characteristic properties (kinetic and thermodynamic) of intermetallic compound hydrides Zr(MxCr1-x)2 with M=Fe, Ni. In order to generalise the validity of our criterion, we have extended our study to other Laves phases (C14) in the literature. The results are found to be in good agreement.

scholarly journals TO THE STUDY OF THE MECHANISM OF TRIGGERING THE PLACEBO EFFECT: PLACEBO AND AUTO-SUGGESTION

2021 ◽  
Vol 9 (3) ◽  
pp. 221-228
Author(s):  
A.V. Khaikin ◽  
Keyword(s):  
Placebo Effect ◽  
Experimental Studies ◽  
Linear Structure ◽  
The Unconscious ◽  
Ethical Problems ◽  
Positive Expectation ◽  
Current State ◽  
The Subject ◽  
State Of Research

The current state of research on the placebo effect is considered. The task is set to develop the idea of the role of positive expectation in the mechanism of placebo implementation. A number of assumptions concerning the nature of placebo and approaches to its study are put forward. Consideration of the effect in its linear structure can contribute to the study of the nature of the placebo. It is useful to understand this phenomenon as consisting of a stage of psychological triggering and a stage of psychosomatic and physiological implementation. In turn, it is useful to consider the first of them as consisting of a preliminary stage of forming a positive (or negative – with nocebo) expectation, confidence in a certain effect of a placebo agent, and the stage of actually triggering a placebo. When implementing the placebo effect, the active expectation of a certain internal process and its result activates the mechanism of auto-suggestion, within which the expected is realized. The placebo is triggered by the implementation of one of the types of autosuggestion process, which does not presuppose any purposeful actions of the subject, for example, orders addressed to the unconscious. A significant part of the studies of the placebo effect nature can be carried out within the framework of the study of the mechanisms and patterns of this way of autosuggestion, which is triggered by the confident active expectation of the subject in the onset of certain internal changes. It is clear that such studies can be carried out in contexts other than those of placebo and nocebo implementation, for example, neutral in relation to the physical and emotional state and make their conduct not burdened with ethical problems. Which, of course, can significantly contribute to the intensification of the study of the placebo nature. It is concluded that the proposed concept develops the thesis about the necessary role of positive expectation in the implementation of the placebo effect, explaining the role of expectation in the mechanism of its launch. Understanding the mechanism of the placebo effect as a mechanism for self-suggestion will significantly simplify the conditions for experimental studies of placebo patterns and creates a context for further research.

scholarly journals Considerations about the relation between occlusal trauma and periodontal/peri-implant disease

2015 ◽  
Vol 18 (2) ◽  
pp. 9 ◽  
Author(s):  
Rafael Binato Junqueira ◽  
Guilherme De Siqueira F. Anzaloni Saavedra ◽  
Nelson Luiz De Macedo
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Periodontal Diseases ◽  
Experimental Studies ◽  
Occlusal Force ◽  
Controversial Topic ◽  
The Subject ◽  
Research Criteria ◽  
The Relationship

<p>The occlusal trauma is an injury to the insertion apparatus as a result of excessive occlusal force, and its interaction with periodontal/peri-implant disease remains controversial topic in the literature. The aim of this study was to review the literature about the relationship between occlusal trauma and periodontal/peri-implant disease, through an analysis of experimental studies in humans and animals, as well as systematic reviews that discussed the role of occlusal factor as etiological or aggravating periodontal/peri-implant disease. It was concluded that, although not considered a cause for the development of periodontitis and peri-implantitis, occlusal trauma can exacerbate bone loss around the teeth or implants. Moreover, the diversity of methodologies in studies on the subject might contribute to the conflicting results available, highlighting the importance of standardization and more detailed research criteria.</p><p><strong> </strong></p><strong>Keywords:</strong> Dental implants; Periodontal diseases; Peri-implantitis; Traumatic dental

scholarly journals Does blood type affect the COVID-19 infection pattern?

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0251535
Author(s):  
Mattia Miotto ◽  
Lorenzo Di Rienzo ◽  
Giorgio Gosti ◽  
Edoardo Milanetti ◽  
Giancarlo Ruocco
Keyword(s):  
Deterministic Model ◽  
Blood Type ◽  
Virus Infectivity ◽  
Geographical Differences ◽  
Blood Types ◽  
Infection Pattern ◽  
The Subject ◽  
The Many ◽  
Good Agreement

Among the many aspects that characterize the COVID-19 pandemic, two seem particularly challenging to understand: i) the great geographical differences in the degree of virus contagiousness and lethality that were found in the different phases of the epidemic progression, and, ii) the potential role of the infected people’s blood type in both the virus infectivity and the progression of the disease. A recent hypothesis could shed some light on both aspects. Specifically, it has been proposed that, in the subject-to-subject transfer, SARS-CoV-2 conserves on its capsid the erythrocytes’ antigens of the source subject. Thus these conserved antigens can potentially cause an immune reaction in a receiving subject that has previously acquired specific antibodies for the source subject antigens. This hypothesis implies a blood type-dependent infection rate. The strong geographical dependence of the blood type distribution could be, therefore, one of the factors at the origin of the observed heterogeneity in the epidemics spread. Here, we present an epidemiological deterministic model where the infection rules based on blood types are taken into account, and we compare our model outcomes with the exiting worldwide infection progression data. We found an overall good agreement, which strengthens the hypothesis that blood types do play a role in the COVID-19 infection.

scholarly journals STUDY OF INFLUENCE OF QUADROCOPTER DESIGN AND SETTINGS ON QUALITY OF ITS WORK DURING MONITORING OF GROUND OBJECTS

2021 ◽  
Vol 5 (4) ◽  
pp. 64-69
Author(s):  
Oleksandr Maidanyk ◽  
Yelyzaveta Meleshko ◽  
Serhii Shymko
Keyword(s):  
Power Factor ◽  
Experimental Studies ◽  
The Body ◽  
Power Cables ◽  
Research Task ◽  
Sensitive Sensor ◽  
The Subject ◽  
Initial Settings

The subject of the article is methods of reducing quadcopter magnetometer crosstalk by changing the design and settings of the copter to improve the quality of its work during the monitoring of ground objects. The relevance of the development is determined by the need to increase the physical safety of quadcopters when monitoring ground facilities in various industries because the magnetometer is the most noise-sensitive sensor, and its failure leads to the fall and loss of the drone. The purpose of the article is to determine the optimal design and settings of the quadcopter in terms of its physical safety and quality of work during monitoring of ground facilities in various industries. The research task is to check whether it is possible to protect the magnetometer placed inside the drone body from the power cables crosstalk by grounding, shielding and changing the initial settings of the copter, namely by changing the value of the startup power factor of the motors. Research methods are as follows: theory of automatic control, methods of optimal control and hardware design methods. Conclusions. The role of the drone magnetometer in the monitoring of ground objects has been studied. The study has shown that copters at monitoring ground objects must be equipped with a magnetometer and GPS. The magnetometer is the most sensitive to interference of all sensors. If it does not work properly, the entire drone navigation system stops working. We have carried out experimental studies of the influence of quadcopter design and settings on the quality of its magnetometer work, and hence on work of the copter as a whole. In this paper it is proposed to place a magnetometer inside the body of the drone that will increase its physical safety and simplify the design of the drone, but at the same time it will increase the coupling from the power cables of motors, so it is necessary to choose effective methods of protection. It has been tested whether it is possible to protect the magnetometer from interference from power cables when placing it inside the drone body by grounding, shielding and changing the initial settings of the copter, namely by changing the value of the startup power factor of the motors. The results of the experiments showed that to protect against the interference for magnetometer placed inside the drone body, it is necessary to combine shielding of the magnetometer and decreasing of the startup power factor of the motors.

Top-Down Processing and Visual Reorientation Illusions in a Virtual Reality Environment

2004 ◽  
Vol 63 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Fred W. Mast ◽  
Charles M. Oman
Keyword(s):  
Virtual Reality ◽  
Visual Processing ◽  
Line Length ◽  
Perceptual Cues ◽  
Virtual Reality Environment ◽  
Top Down ◽  
Test Conditions ◽  
The Subject ◽  
Processing Mechanisms

The role of top-down processing on the horizontal-vertical line length illusion was examined by means of an ambiguous room with dual visual verticals. In one of the test conditions, the subjects were cued to one of the two verticals and were instructed to cognitively reassign the apparent vertical to the cued orientation. When they have mentally adjusted their perception, two lines in a plus sign configuration appeared and the subjects had to evaluate which line was longer. The results showed that the line length appeared longer when it was aligned with the direction of the vertical currently perceived by the subject. This study provides a demonstration that top-down processing influences lower level visual processing mechanisms. In another test condition, the subjects had all perceptual cues available and the influence was even stronger.

The future role of the psychiatrist in Europe – a UEMS perspective

2014 ◽  
Vol 11 (01) ◽  
pp. 35-42
Author(s):  
M. Hermans
Keyword(s):  
Mental Health ◽  
Mental Health Professionals ◽  
Health Professionals ◽  
General Interest ◽  
Future Role ◽  
Personal Opinion ◽  
The Future ◽  
The Subject ◽  
The Many

SummaryThe author presents his personal opinion inviting to discussion on the possible future role of psychiatrists. His view is based upon the many contacts with psychiatrists all over Europe, academicians and everyday professionals, as well as the familiarity with the literature. The list of papers referred to is based upon (1) the general interest concerning the subject when representing ideas also worded elsewhere, (2) the accessibility to psychiatrists and mental health professionals in Germany, (3) being costless downloadable for non-subscribers and (4) for some geographic aspects (e.g. Belgium, Spain, Sweden) and the latest scientific issues, addressing some authors directly.

Alignment

2016 ◽  
pp. 33-50
Author(s):  
Pier Giuseppe Rossi
Keyword(s):  
Teaching And Learning ◽  
Enactive Approach ◽  
The World ◽  
Strategic Role ◽  
Education Today ◽  
Current Context ◽  
The Subject

The subject of alignment is not new to the world of education. Today however, it has come to mean different things and to have a heuristic value in education according to research in different areas, not least for neuroscience, and to attention to skills and to the alternation framework.This paper, after looking at the classic references that already attributed an important role to alignment in education processes, looks at the strategic role of alignment in the current context, outlining the shared construction processes and focusing on some of the ways in which this is put into effect.Alignment is part of a participatory, enactive approach that gives a central role to the interaction between teaching and learning, avoiding the limits of behaviourism, which has a greater bias towards teaching, and cognitivism/constructivism, which focus their attention on learning and in any case, on that which separates a teacher preparing the environment and a student working in it.

TheOrvosi Hetilap (Hungarian Medical Journal)in the network of medical journals

2014 ◽  
Vol 155 (22) ◽  
pp. 876-879
Author(s):  
András Schubert
Keyword(s):  
Medical Journal ◽  
Scientific Knowledge ◽  
Knowledge Network ◽  
Scientific Journals ◽  
Scientific Enterprise ◽  
Medical Journals ◽  
The Subject

The role of networks is swiftly increasing in the production and communication of scientific knowledge. Network aspects have, therefore, an ever growing importance in the analysis of the scientific enterprise, as well. The present paper demonstrates some techniques of studying the network of scientific journals on the subject of seeking the position of Orvosi Hetilap (Hungarian Medical Journal) in the international journal network. Orv. Hetil., 2014, 155(22), 876–879.

“Channeling” the powers of God’s Word

2010 ◽  
Vol 4 (2) ◽  
pp. 135-156 ◽  
Author(s):  
Dorothea E. Schulz
Keyword(s):  
The Other ◽  
Border Zone ◽  
Focus Attention ◽  
Spiritual Power ◽  
New Materials ◽  
God's Word ◽  
Audio Recordings ◽  
Heated Debate ◽  
The Subject ◽  
The One

Starting with the controversial esoteric employment of audio recordings by followers of the charismatic Muslim preacher Sharif Haidara in Mali, the article explores the dynamics emerging at the interface of different technologies and techniques employed by those engaging the realm of the Divine. I focus attention on the “border zone” between, on the one hand, techniques for appropriating scriptures based on long-standing religious conventions, and, on the other, audio recording technologies, whose adoption not yet established authoritative and standardized forms of practice, thereby generating insecurities and becoming the subject of heated debate. I argue that “recyclage” aptly describes the dynamics of this “border zone” because it captures the ways conventional techniques of accessing the Divine are reassessed and reemployed, by integrating new materials and rituals. Historically, appropriations of the Qur’an for esoteric purposes have been widespread in Muslim West Africa. These esoteric appropriations are at the basis of the considerable continuities, overlaps and crossovers, between scripture-related esoteric practices on one side, and the treatment by Sharif Haidara’s followers of audio taped sermons as vessels of his spiritual power, on the other.

The Impact of Quantitative Easing on Emerging Markets – Literature Review

e-Finanse ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. 67-76
Author(s):  
Piotr Bartkiewicz
Keyword(s):  
Emerging Markets ◽  
Large Scale ◽  
Empirical Literature ◽  
Quantitative Easing ◽  
Methodological Choices ◽  
The Subject ◽  
Methodological Approaches ◽  
The Impact ◽  
Sufficient Precision

AbstractThe article presents the results of the review of the empirical literature regarding the impact of quantitative easing (QE) on emerging markets (EMs). The subject is of interest to policymakers and researchers due to the increasingly larger role of EMs in the world economy and the large-scale capital flows occurring after 2009. The review is conducted in a systematic manner and takes into consideration different methodological choices, samples and measurement issues. The paper puts the summarized results in the context of transmission channels identified in the literature. There are few distinct methodological approaches present in the literature. While there is a consensus regarding the direction of the impact of QE on EMs, its size and durability have not yet been assessed with sufficient precision. In addition, there are clear gaps in the empirical findings, not least related to relative underrepresentation of the CEE region (in particular, Poland).

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