Variation of Lattice Spacing with Thickness of Thin Gold Platelets

Author(s):  
D. C. Smart

Variation of lattice parameters with crystal size in very small crystals (generally less than 500 Å in size) has been the subject of many research papers over a long period of time. In principle this method should provide a direct experimental measurement of surface tension but in many cases the reported results are contradictory. This fact has been noted in recent reviews, and the abnormal spacings are now generally regarded with considerable reserve. The many reported contradictions arise from a variety of experimental factors which cannot be discussed here. This paper, however, reports new experiments using a different approach which we believe has eliminated the previous experimental difficulties, and conclusively demonstrates lattice parameter variations associated with surface energy. These experiments consist of the preparation of thin, parallel, clean and nearly perfect platelets of Au and the subsequent measurement of the lattice spacings of these platelets as a function of thickness.The Au platelets were chemically grown by the reduction of chloroauric acid with salicylic acid. Reproducibly clean crystals from 1-5 µ in diameter and ranging in thickness from 80-300 Å were produced.

2010 ◽  
Vol 163 ◽  
pp. 268-271 ◽  
Author(s):  
Krzysztof Szostek ◽  
Wojciech Gurdziel ◽  
Zygmunt Wokulski

The subject of the study was an examination of the lattice parameter variations of the constituent phases in CoSi2-Si eutectic composite according to the vertical axes of samples. A preparation of samples has been conducted using Bridgman and Czochralski techniques. The aim of the study was to establish an influence of applied preparation method on a stability of appropriate lattice parameters. It was shown that the constituent phases of the CoSi2-Si eutectic samples obtained via Czochralski technique are distinguished by a higher stability of the lattice parameter than samples obtained using Bridgman technique.


2014 ◽  
Vol 11 (01) ◽  
pp. 35-42
Author(s):  
M. Hermans

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.


Author(s):  
Pierre Iselin

Pierre Iselin broaches the subject of early modern music and aims at contextualising Twelfth Night, one of Shakespeare’s most musical comedies, within the polyphony of discourses—medical, political, poetic, religious and otherwise—on appetite, music and melancholy, which circulated in early modern England. Iselin examines how these discourses interact with what the play says on music in the many commentaries contained in the dramatic text, and what music itself says in terms of the play’s poetics. Its abundant music is considered not only as ‘incidental,’ but as a sort of meta-commentary on the drama and the limits of comedy. Pinned against contemporary contexts, Twelfth Night is therefore regarded as experimenting with an aural perspective and as a play in which the genre and mode of the song, the identity and status of the addressee, and the more or less ironical distance that separates them, constantly interfere. Eventually, the author sees in this dark comedy framed by an initial and a final musical event a dramatic piece punctuated, orchestrated and eroticized by music, whose complex effects work both on the onstage and the offstage audiences. This reflection on listening and reception seems to herald an acoustic aesthetics close to that of The Tempest.


2017 ◽  
Vol 5 (2) ◽  
pp. 80-96
Author(s):  
Raid Saleem Abd Ali ◽  
Nooran kanaan Yassin

This research aims to diagnose and identify the causes of claims and disputes between the contractor and the employer, also review the methods used to resolve disputes in construction contracts. In order to achieve the goal of the research, scientific methodology is followed to collect information and data on the subject of claims and disputes in construction projects in Iraq through personal interviews and questionnaire form. The most important results in this research are: the price schedule contract as a kind of competitive contracts is the most important and guarantee for the completion of minimum level of claims and disputes with relative importance of (84.1), compared with the (cost plus a percentage of the cost contract) as a kind of negotiating contracts is the most relative importance of (79.6), and the turnkey contract as a kind of special contracts is the most relative importance of (74.2). The  contractor and  his agents are one of the most influence sources in occurring claims and disputes in construction contracts with relative importance of (77.4) followed by the contract documents with relative importance of (74.2) and then the employer with relative importance of (73.2). In addition to the long period of litigation and the multiplicity of veto grades are most negative when contractual disputes have resolved by it, and with relative importance of (86), followed by the large number of issues and lack of efficiency and specialty of Judges with relative importance (78.4). Finally, the direct negotiation method (relative importance of 77) is one of the most friendly settlement ways favored by conflicted parties, while the resolution of disputes and claims board (relative importance of 10) occupied the last rank in the friendly settlement ways.


2021 ◽  
Author(s):  
Andi Asrifan ◽  
Abd Ghofur

Anyone who wants to get ahead in academic or professional life today knows that it’s a question of publish or perish. This applies to colleges, universities, and even hospital Trusts. Yet writing for publication is one of the many skills which isn’t formally taught. Once beyond undergraduate level, it’s normally assumed that you will pick up the necessary skills as you go along.Writing for Academic Journalsseeks to rectify this omission. Rowena Murray is an experienced writer on the subject (author of How to Write a Thesis and How to Survive Your Viva) and she is well aware of the time pressures people are under in their professional lives. What she has to say should be encouraging for those people in ‘new’ universities, people working in disciplines which have only recently been considered academic, and those in professions such as the health service which are under pressure to become more academic.


2020 ◽  
Vol 384 (2) ◽  
pp. 222-232
Author(s):  
P. V. Menshikov ◽  
G. K. Kassymova ◽  
R. R. Gasanova ◽  
Y. V. Zaichikov ◽  
V. A. Berezovskaya ◽  
...  

A special role in the development of a pianist as a musician, composer and performer, as shown by the examples of the well-known, included in the history of art, and the most ordinary pianists, their listeners and admirers, lovers of piano music and music in general, are played by moments associated with psychotherapeutic abilities and music features. The purpose of the study is to comprehend the psychotherapeutic aspects of performing activities (using pianists as an example). The research method is a theoretical analysis of the psychotherapeutic aspects of performing activities: the study of the possibilities and functions of musical psychotherapy in the life of a musician as a “(self) psychotherapist” and “patient”. For almost any person, music acts as a way of self-understanding and understanding of the world, a way of self-realization, rethinking and overcoming life's difficulties - internal and external "blockages" of development, a way of saturating life with universal meanings, including a person in the richness of his native culture and universal culture as a whole. Art and, above all, its metaphorical nature help to bring out and realize internal experiences, provide an opportunity to look at one’s own experiences, problems and injuries from another perspective, to see a different meaning in them. In essence, we are talking about art therapy, including the art of writing and performing music - musical psychotherapy. However, for a musician, music has a special meaning, special significance. Musician - produces music, and, therefore, is not only an “object”, but also the subject of musical psychotherapy. The musician’s training includes preparing him as an individual and as a professional to perform functions that can be called psychotherapeutic: in the works of the most famous performers, as well as in the work of ordinary teachers, psychotherapeutic moments sometimes become key. Piano music and performance practice sets a certain “viewing angle” of life, and, in the case of traumatic experiences, a new way of understanding a difficult, traumatic and continuing to excite a person event, changing his attitude towards him. It helps to see something that was hidden in the hustle and bustle of everyday life or in the patterns of relationships familiar to a given culture. At the same time, while playing music or learning to play music, a person teaches to see the hidden and understand the many secrets of the human soul, the relationships of people.


2021 ◽  
pp. 135676672110533
Author(s):  
Georgiana-Denisse Savin ◽  
Cristina Fleșeriu ◽  
Larissa Batrancea

In recent years, the number of studies in tourism using the eye tracking technique has increased and started generating valuable information for both academics and the industry. However, there is a gap in the literature concerning systematic reviews focused on recent articles and their findings. Thus, the aim of this study is to close this gap by systematically analysing 70 research papers tackling the subject of eye tracking in tourism and published in highly ranked tourism journals. The study identifies the most popular topics and trends for eye tracking research, as well as the most used types of visual stimuli, such as exhibitions, restaurant menus, promotional pictures or websites. The study also details on measurements specific for the analysis of eye tracking data, including fixations, saccades and heat maps. Results are emphasized along with their theoretical and practical implications. In addition, we highlight the lack of the use of dynamic stimuli in the existing literature and suggest further research directions using the eye tracking technique.


PEDIATRICS ◽  
1948 ◽  
Vol 2 (2) ◽  
pp. 237-237
Author(s):  
C. ANDERSON ALDRICH
Keyword(s):  
The Many ◽  

This book adds another volume to the many already published on the subject of child care. Its preface and foreword are written by Donovan J. McCune, M.D., and Norvelle C. LaMar, M.D., respectively, who endorse the author's statements. There is little in the way of advice to which I would not subscribe. In fact it is remarkable that So many pages can be filled with so much advice which is highly acceptable. Miss Turner has done a masterful job of summarizing the liberal ideas of our times. However, one begins to doubt the efficacy of any book so full of instructions without an adequate discussion of the "whys" of liberal ideas.


PEDIATRICS ◽  
1952 ◽  
Vol 10 (3) ◽  
pp. 378-378

This interesting book, written in French, consists of 535 pages of which 46 are devoted to the description of the many tests now in use in psychologic work, and 33 deal with an extensive "international" bibliography on the subject of child social-psychiatry. The most important part of the book is devoted to the broad subject of child psychiatry itself which is approached through many different angles and by authors of various countries including France, Great Britain, Sweden, Belgium, Spain and Switzerland.


PEDIATRICS ◽  
1963 ◽  
Vol 32 (4) ◽  
pp. 737-741
Author(s):  
D. B. Dill

THE STUDY of work performance as related to age began in this country when Sid Robinson joined the group at the Fatigue Laboratory of the Harvard School of Business Administration. In the winter of 1936-7, he persuaded five champion milers who were in Boston for indoor meets to run on the Laboratory's treadmill on week-ends. Simultaneously, he was chiefly engaged in studying treadmill performance as related to age. This was the subject of his doctorate thesis published later under the title: "Experimental Studies of Physical Fitness as Related to Age". The 91 subjects ranged in age from boys 6 years of age to one man of 91. There were eight 6-year-olds, 10 between 8 and 13 and 20 between 48 and 76. Robinson's background as an Olympic middle-distance runner and as an assistant track coach at Indiana University gave him skill in dealing with the many diverse problems that confronted him. Often he was faced with sociological-psychological problems more difficult to solve than the physiological problems. Indicative of his success is the fact that the subjects were volunteers—no money was offered as an inducement to come to the laboratory. Also worthy of note is that there was no untoward incident throughout the study. Robinson's plan included respiratory, circulatory and metabolic observations in the basal state and in two grades of exercise. He describes the work experiments as follows: (pp. 251-3, reference 2) "After the above observations were completed, the subject performed two grades of work on a motor-driven treadmill, set at an angle of 8.6% in all experiments. Each subject below 73 years of age first walked at 5.6 km per hour for 15 minutes; this raises the oxygen consumption 7 or 8 times the basal level. After resting 10 minutes, he ran or in some cases, walked, at a rate which exhausted him in 2 to 5 minutes.


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