Mechanical Engineering Aspects of Naval Mining

1949 ◽  
Vol 160 (1) ◽  
pp. 22-32
Author(s):  
E. C. Wadlow
Keyword(s):  
Scientific Knowledge ◽  
Mechanical Engineering ◽  
Safety Requirements ◽  
Contact Type ◽  
Engineering Problems ◽  
The Subject ◽  
Considerable Complexity

The paper outlines some of the engineering problems which arise in connexion with naval mining, and describes some of the weapons and devices used by Britain and Germany in the war of 1939–45. Although naval mining has a long history, its development is necessarily conducted under conditions of secrecy, and publication of information concerning it is possible only after a major war in which there has been a general disclosure of methods and materials employed by both sides. The popular conception of a mine is a spherical buoyant object which will explode if hit by a ship. The buoyant contact type is, however, only one of many forms now available. A number of these are illustrated here, and the variety may surprise those not familiar with the subject. Methods of laying, general principles of operation, and safety requirements are described, and the mechanical details of design of mineshells, fittings, components for control and firing circuits, and other features are mentioned. Naval mines have reached a state of considerable complexity and many fields of scientific knowledge are now called upon in making them effective weapons.

Innovative Approach for Teaching Graphical Engineering Focused on CAD/CAM/CAE Systems

2013 ◽  
Vol 572 ◽  
pp. 311-314
Author(s):  
Juan Carlos Pérez-Cerdán ◽  
Miguel Lorenzo ◽  
Alejandro Reveriego ◽  
Carmen Blanco
Keyword(s):  
Design Process ◽  
Mechanical Engineering ◽  
Innovative Approach ◽  
Structural Components ◽  
New Approach ◽  
Engineering School ◽  
Engineering Problems ◽  
Cad Cam ◽  
The Subject ◽  
The University

A new approach of the teaching of the subject Graphical engineering is developed at the Engineering School of the University of Salamanca, focusing the contents on the use of the CAD/CAM/CAE systems as useful tools for applying engineering problems related with the mechanical engineering instead of describing diverse software options. Thus, the contents of the subject are divided into two blocks, one devoted to the analysis of the results of simulation of movement of diverse mechanisms and the second devoted to the analysis of diverse cases of loading structural components by means of FEA module, both available in the Autodesk Inventor Pro suite which can be downloaded free by the students. This way, students can visualize and realize of the complexity of a design process in engineering.

Photo-Elastimetric Researches on Mechanical Engineering Problems

1923 ◽  
Vol 104 (1) ◽  
pp. 489-491
Author(s):  
E. G. Coker ◽  
John Dewrance
Keyword(s):  
Cross Section ◽  
Mechanical Engineering ◽  
Cutting Tools ◽  
Polarized Light ◽  
Large Cross Section ◽  
Thin Slice ◽  
Large Size ◽  
Engineering Problems ◽  
The Subject ◽  
Iceland Spar

In a former Graduates' Lecture delivered in 1913* the Lecturer described the general principles of Photo-Elasticity, and some applications to Engineering. The present Lecture was therefore devoted to a consideration of some developments of the subject which have taken place since, and attention was mainly directed to improvements in apparatus for photo-elastic investigation and to the results obtained by this method of research when applied to elucidate the action of cutting tools. A prime necessity in all such work is a beam of polarized light of large cross-section and considerable purity, and the scarcity of Iceland spar for Nicol's prisms of sufficiently large size has led to the use of other forms of polarizers, of which a very convenient one was described, consisting of a thin slice of Iceland spar suitably mounted between glass wedges, and provided with converging and diverging lens systems, whereby a beam of large cross-section and of great purity is obtained.

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.

Traditional knowledge and satellite tracking as complementary approaches to ecological understanding

2004 ◽  
Vol 31 (3) ◽  
pp. 177-180 ◽  
Author(s):  
HENRY P. HUNTINGTON ◽  
ROBERT S. SUYDAM ◽  
DANIEL H. ROSENBERG
Keyword(s):  
Environmental Management ◽  
Traditional Knowledge ◽  
Scientific Knowledge ◽  
Spatial Scales ◽  
Satellite Tracking ◽  
Migratory Species ◽  
Ecological Understanding ◽  
Considerable Research ◽  
The Subject ◽  
Management And Conservation

The integration or co-application of traditional knowledge and scientific knowledge has been the subject of considerable research and discussion (see Johannes 1981; Johnson 1992; Stevenson 1996; McDonald et al. 1997; Huntington et al. 1999, 2002), with emphasis on various specific topics including environmental management and conservation (see Freeman & Carbyn 1988; Ferguson & Messier 1997; Ford & Martinez 2000; Usher 2000; Albert 2001). In most cases, examples of successful integration compare traditional and scientific observations at similar spatial scales to increase confidence in understanding or to fill gaps that appear from either perspective. We present a different approach to integration, emphasizing complementarity rather than concordance in spatial perspective, using two migratory species as examples.

Identification of Modal Parameters of an Elastic Rotor With Oil Film Bearings

1984 ◽  
Vol 106 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Rainer Nordmann
Keyword(s):  
Modal Analysis ◽  
Dynamic Behavior ◽  
Design Process ◽  
Mechanical Engineering ◽  
Mechanical Systems ◽  
Rotating Machinery ◽  
Modal Parameters ◽  
Powerful Method ◽  
Oil Film ◽  
Engineering Problems

Investigations of the dynamic behavior of structures have become increasingly important in the design process of mechanical systems. To have a better understanding of the dynamic behavior of a structure, the knowledge of the modal parameters is very important. The powerful method of experimental modal analysis has been used to measure modal parameters in many mechanical engineering problems. But the method was mainly applied to nonrotating structures. This presentation shows improvements of the classical modal analysis for a successful application in rotating machinery with nonconservative effects. An example is given, investigating the modal parameters of an elastic rotor with oil film bearings.

Problems for the architect and town planner caused by air in motion

1971 ◽  
Vol 269 (1199) ◽  
pp. 335-341 ◽  
Keyword(s):  
The Other ◽  
Short Paper ◽  
High Rise ◽  
Engineering Problems ◽  
Original Contribution ◽  
Motion Range ◽  
The Subject

This short paper makes no original contribution to knowledge but simply describes and identifies a range of problems encountered in practice by town planners and architects. The term ‘ architectural ’ in the subject title of the Discussion Meeting is taken to imply that the results of aerodynamic research are now as applicable to architectural as to engineering problems. Architecture is broadly interpreted as the coordination of many techniques to give significant form to social programmes. As this is a comprehensive activity, it follows that the problems caused by air in motion range from the location and layout of whole cities at one end of the scale, to the design of a window or the control of an ornamental jet of water at the other. In the middle of this range typical problems arise from the siting of buildings singly and in groups, and in the structure and cladding of high-rise and low-rise buildings to resist wind, rain penetration and air-borne pollution.

scholarly journals Prueba cognitiva–cuantitativa para identificar el Acercamiento Comunicativo Dialógico Textual del docente

2016 ◽  
pp. 45-74
Author(s):  
Mtra. Claudia Flores Cervantes ◽  
Dra. Alma Alicia Benítez Pérez
Keyword(s):  
Reading Comprehension ◽  
Knowledge Acquisition ◽  
Scientific Knowledge ◽  
Teaching Staff ◽  
Scientific Texts ◽  
Quantitative Test ◽  
First Results ◽  
The Subject ◽  
Probabilistic Diagnosis ◽  
Cognitive Dimensions

Este artículo tiene como objetivo proponer una prueba cognitiva–cuantitativa para identificar el Acercamiento Comunicativo Dialógico Textual en el docente de nivel medio superior con relación al texto científico, a partir de la elaboración de una rúbrica integrada por categorías (dimensiones cognitivas) y niveles de comprensión de lectura, al tiempo de ser una base para la elaboración de ítems. Actualmente la prueba se encuentra en etapa diagnóstica y es de corte cuantitativo no probabilístico. Los primeros resultados señalan que sí es posible identificar el ACDT, justo donde la decodificación que realiza el sujeto sobre el objeto textual, determina la profundidad del diálogo y la adquisición del conocimiento científico en torno al mensaje. AbstractThe objective of this article is to propose a cognitive–quantitative test to identify the Dialogic–Textual Communicative Approach Of the upper middle education's teaching staff about scientific texts, from a rubric integrated by categories (cognitive dimensions) and reading comprehension levels. It's important to mention that this rubric was also used to elaborate the items. Currently the test is on a quantitative not probabilistic diagnosis stage. The first results conclude that certainly the ACDT, can be identifiable, where the decoding that the subject is doing about the textual object, determines the depth of the dialogue and the scientific knowledge acquisition about the message. Recibido: 17 de agosto de 2015 Aceptado: 01 de marzo de 2016

scholarly journals An Explanation About Canonical Forms and Real Molecule in Resonance Theory, Through Instructors Own Sketches Analogy

2020 ◽  
Author(s):  
faiz ahmed
Keyword(s):  
Scientific Knowledge ◽  
Scientific Community ◽  
Daily Life ◽  
Subject Area ◽  
Canonical Forms ◽  
Canonical Structure ◽  
Resonance Theory ◽  
Personal Experiences ◽  
The Subject ◽  
The Difference

<p>In elementary chemistry courses students often demonstrate difficulty with real understanding of Resonance Theory i.e. canonical structure vs. real molecule difference, so unanswered puerile questions during lecture made the subject boring. Particularly students unable to understand the difference between a real microscopic moiety and it’s proposed sketch or model at early stages of their learning. In such situations use of suitable analogy other than the subject area make the teaching more effective. Using an analogy from the daily life act as a powerful tool to explain curious questions efficiently to develop the interest of the students in subject. Sharing of personal experiences and analogies among scientific community is an effective way to spread scientific knowledge magnificently.<br></p>

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