Approximate Approach for Torsion Problem of a Shaft With a Circumferential Notch

1952 ◽  
Vol 19 (1) ◽  
pp. 16-18
Author(s):  
H. Ōkubo
Keyword(s):  
Maximum Stress ◽  
Point Of View ◽  
Torsion Problem ◽  
Circular Section ◽  
Technical Point ◽  
Approximate Approach ◽  
Long Period ◽  
Circumferential Notch

Abstract The torsion problem of a bar with varying circular section has been treated by several investigators over a long period. Usually, the solution covering all points in a shaft is found first and then the maximum stress is obtained. Accordingly, the analysis usually becomes complicated and so only few cases have been treated completely. It is essential from the technical point of view, however, to find the stresses around a notch rather than the stresses at every point in a shaft. The approach employed in this paper is somewhat different from others, and the approximate values for the stresses on the surface of a shaft are found directly without solving the problem completely.

The growth of mica polytypes as studied by conventional and high-resolution TEM

1983 ◽  
Vol 41 ◽  
pp. 174-177
Author(s):  
A. Baronnet ◽  
M. Amouric
Keyword(s):  
Water Pressure ◽  
Point Of View ◽  
Temperature Fields ◽  
Natural Occurrence ◽  
Growth Mechanisms ◽  
Long Period ◽  
High Resolution Tem ◽  
Layer Stacking ◽  
Experimental Works ◽  
Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

Immunocytochemical methodology for the localization of neuronal antigens at the ultrastructural level

1990 ◽  
Vol 48 (3) ◽  
pp. 876-877
Author(s):  
Jorge Pecci Saavedra ◽  
Mark Connaughton ◽  
Juan José López ◽  
Alicia Brusco
Keyword(s):  
Spinal Cord ◽  
Substantia Nigra ◽  
Polyclonal Antibodies ◽  
Ultrastructural Level ◽  
Point Of View ◽  
Nerve Tissue ◽  
Tissue Fixation ◽  
Optimal Conditions ◽  
Interpeduncular Nucleus ◽  
Technical Point

The use of antibodies as labels for the localization of specific molecules in the nervous systan has been extensively applied in recent years. Both monoand polyclonal antibodies or antisera have been employed. The knowledge of the organization of neuronal connectivities, gliovascular relationships, glioneuronal relationships and other features of nerve tissue has greatly increased.A number of areas of the nervous systan have been analyzed in our laboratory, including the nuclei of the raphe system, the reticular formation, interpeduncular nucleus, substantia nigra, caudate nucleus, putamen, pallidum, spinal cord, pineal gland and others.From a technical point of view, a number of variables needed to be taken into account in order to obtain reliable and reproducible results. The design of the optimal conditions of tissue fixation, embedding, sectioning, dilution of antibodies, and adaptation of Sternberger PAP technique were sane of the parameters taken into account to optimize the results. It is critical that each step of the technique be defined for each particular case.

Localized Irrigation System for Thuja Orientalis in Intensive Culture

2018 ◽  
Vol 20 (1) ◽  
pp. 119-126
Author(s):  
Mădălina Stănescu ◽  
Constantin Buta ◽  
Geanina Mihai ◽  
Lucica Roșu
Keyword(s):  
Irrigation System ◽  
Ornamental Plants ◽  
Point Of View ◽  
First Year ◽  
Intensive Culture ◽  
Technical Point ◽  
Production Factors ◽  
Thuja Orientalis ◽  
Agricultural Farm

Abstract In order to increase the competitiveness of an agricultural holding through the efficient use of the production factors, the modernization of an agricultural farm was carried out by exending the existing greenhouse with at least 700m2 for the intensive cultivation of ornamental plants - Thuja Orientalis. The material is produced by initiating crops in pots, with seedlings grown in pots or transplanting them in pots right after the first year of the multiplication and growing them in containers, appropriate to their size, until reaching their full value. From a technical point of view, reaching the objective will also be possible through a localized irrigation system.

History: changing the forms or forming the changes?

2005 ◽  
Vol 13 (1) ◽  
pp. 47-66 ◽  
Author(s):  
SVEND ERIK LARSEN
Keyword(s):  
Cultural History ◽  
18Th Century ◽  
Point Of View ◽  
Future Planning ◽  
Long Period ◽  
Close Analysis ◽  
Vitruvian Man ◽  
Human Responsibility ◽  
The Individual ◽  
Individual Human

Change in European cultural history has, for a long period, been discussed through two interrelated notions, that of science and that of history. This paper traces the various stages of this discussion from Antiquity to the present day from the point of view of history. Two reoccurring and paradigmatic characters of mythological descent, Odysseus and Prometheus, illustrate how history as a realm for human responsibility and future planning has established itself as a specific European construct, with the 18th century as its final breakthrough in practical and ideological terms. A close analysis of Leonardo da Vinci's drawing the Vitruvian Man, in statu nascendi, shows how the individual human being carrying the obligations and the promises of this history, is envisioned. The final remarks underline the importance of scientific knowledge in the concrete shaping of this responsibility and a plea for an increased cooperation across the disciplines.

Bayesian Forcasting Model – 2020 Presidential Elections in the United States of America

2021 ◽  
Vol 704 (1) ◽  
pp. 91-104
Author(s):  
Maria Raczyńska
Keyword(s):  
United States ◽  
United States Of America ◽  
Presidential Elections ◽  
Bayesian Models ◽  
The United States ◽  
Point Of View ◽  
Forecasting Model ◽  
Bayesian Forecasting ◽  
Technical Point ◽  
Made In

The article describes and explains a prior centric Bayesian forecasting model for the 2020 US elections.The model is based on the The Economist forecasting project, but strongly differs from it. From the technical point of view, it uses R and Stan programming and Stan software. The article’s focus is on theoretical decisions made in the process of constructing the model and outcomes. It describes why Bayesian models are used and how they are used to predict US presidential elections.

Face, Image, and Analysis

2010 ◽  
pp. 1-15
Author(s):  
Yu-Jin Zhang ◽  
Yu-Jin Zhang ◽  
J.L. Molina ◽  
R. Giordano ◽  
J. Bromley
Keyword(s):  
Image Analysis ◽  
Face Image ◽  
Research Topic ◽  
Point Of View ◽  
Research Development ◽  
Technical Point ◽  
Face Image Analysis ◽  
Human Faces ◽  
General Technical

Face image analysis, consisting of automatic investigation of images of (human) faces, is a hot research topic and a fruitful field. This introductory chapter discusses several aspects of the history and scope of face image analysis and provides an outline of research development publications of this domain. More prominently, different modules and some typical techniques for face image analysis are listed, explained, described, or summarized from a general technical point of view. One picture of the advancements and the front of this complex and prominent field is provided. Finally, several challenges and prominent development directions for the future are identified.

The Nature of Data

2021 ◽  
pp. 23-30
Author(s):  
Rob Kitchin
Keyword(s):  
Natural Philosophy ◽  
Point Of View ◽  
Computational Science ◽  
Experimental Science ◽  
Technical Point ◽  
Scientific Innovation ◽  
The World ◽  
Theoretical Science ◽  
Term Data ◽  
Over Time

This chapter examines the nature of data from an etymological, philosophical, and technical point of view. Data is derived from the Latin dare, meaning 'to give'. In general use, however, data refers to those elements that are taken. Technically, what is understood to be data are actually capta (derived from the Latin capere, meaning 'to take'); those units of data that have been selected and harvested from the sum of all potential data. It is no coincidence that the use of the word 'data' emerged during the Renaissance. At this time, there was a flourishing of scientific innovation with respect to philosophy, equipment, and analysis that led to new discoveries and theories across the academy and new inventions in business, and transformed the world. In the 18th and 19th centuries, the use of the term 'data' extended from mathematics and natural philosophy to economics and administration. In the 20th century, data came to mean any information stored and used in the context of computing, and its uses multiplied beyond science and administration. The chapter then looks at four dominant scientific paradigms centred on epistemological approaches: experimental science, theoretical science, computational science, and exploratory science. What this discussion reveals is that not only is data manufactured, but the approach to and process of manufacturing has changed over time.

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