Thixoforming of Steel: A State of the Art from an Industrial Point of View

2008 ◽  
Vol 141-143 ◽  
pp. 25-35 ◽  
Author(s):  
Pierre Cezard ◽  
T. Sourmail
Keyword(s):  
Mechanical Properties ◽  
State Of The Art ◽  
Point Of View ◽  
Raw Material ◽  
Forming Process ◽  
Research Teams ◽  
The World ◽  
The Subject ◽  
Semi Solid ◽  
Forming Tools

Since the first research works in the end of 1980s on the semi-solid forming of steel, this process has presented a great interest and a real industrial potential. Several research teams, all over the world, have shown the feasibility of such a process. Working on the parameters which have an influence on the process, they pointed out the "technical locks" which must be overcome to allow industrialization of the process. A first and perhaps most important difficulty is the reliability of the forming tools in an industrial production context. Much work has therefore been devoted to identify ways to increase tools life. A second important point is the possibility to obtain sound microstructure and satisfactory mechanical properties. This paper is a state of the art review on the subject of the thixoforming of steel, restricted to forming of semi-solid reheated steel. Semi-solid forming process carried out after partial solidification are therefore not covered. The reader interested in such processes may refer to the review recently published by Hirt et al. [1]. The present review considers, in turn, the different steps of an hypothetical production line and their particular challenges, from the raw material to the final product.

scholarly journals The female characters in Branislav Nušić's and Stefan Kostov's selected comedies

Bastina ◽  
2020 ◽  
pp. 95-109
Author(s):  
Đurđina Isić
Keyword(s):  
Small Town ◽  
Point Of View ◽  
Theoretical Point ◽  
Female Characters ◽  
Modern Age ◽  
The Social ◽  
The World ◽  
The Subject ◽  
Bereaved Family

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.

scholarly journals To the Question of the Relevance of Updating School Environmental Education

2021 ◽  
Vol 16 (2) ◽  
pp. 112-120
Author(s):  
Sabrekova Maria S. ◽  
Keyword(s):  
Sustainable Development ◽  
Environmental Education ◽  
General Education ◽  
Primary School ◽  
Point Of View ◽  
Education Development ◽  
School Subjects ◽  
The World ◽  
The Subject ◽  
Ecological Culture

The article is devoted to the analysis of the scientific and philosophical thought development, which served as a challenge to the renewal of the content of environmental education at the beginning of the XXI century. The analysis of the stages of domestic environmental education development, its content from the point of view of reflection in it of relations between society and nature is carried out. A new stage in the environmental education development in the 21st century is associated with the spread of ideas of sustainable development, which determine the transformation of all spheres of human culture. The article provides examples of tasks that currently exist in the educational literature for one of the primary school subjects, and a variant of their change from the standpoint of environmental education in the interests of sustainable development is proposed. The modern literature on the methodology of teaching the subject “The World Around” in primary school is considered from the point of view of the representation of the content of environmental education in it. The author comes to the conclusion about the insufficiency of the natural science orientation of environmental education for the formation of students’ ideas about the environmental imperative – a key category for understanding the conditions for harmonizing nature, society and the world of things. Based on the analysis performed, a conclusion was made about the relevance of updating the content of school environmental education. It is substantiated that this will contribute to the achievement of its planned result – the formation of a modern ecological culture among students. Keywords: general education, environmental education, educational content, environmental imperative, environmental culture

Information in the Situation

2012 ◽  
pp. 31-60
Keyword(s):  
Point Of View ◽  
Raw Material ◽  
Information Element ◽  
Ideal Form ◽  
The World ◽  
Other Information

Although in an ideal form the information in the world would not involve people, in reality, it has no meaning without people observing and interacting with it. There is a widespread myth (a positivistic view) that information is something in the world that does not depend on people’s point of view and that it is independent of the situation in which it occurs. But information never has fixed significance. The available data is simply the raw material that must be processed. Any particular information element gains significance only from its relationship to other information in the context in which it occurs (Woods, Patterson, & Roth, 2002). However, this chapter tries to minimize those interaction and interpretation aspects, deferring those for the later parts of the book. Instead, it concentrates on the issues of the information in the situation before it gets mentally processed.

Internalism and externalism in epistemology

2018 ◽  
Author(s):  
William P. Alston
Keyword(s):  
External World ◽  
Great Distance ◽  
Reliability Test ◽  
Epistemic Status ◽  
Forming Process ◽  
Evil Demon ◽  
Positive View ◽  
Long Run ◽  
The World ◽  
The Subject

The internalism–externalism distinction is usually applied to the epistemic justification of belief. The most common form of internalism (accessibility internalism) holds that only what the subject can easily become aware of (by reflection, for example) can have a bearing on justification. We may think of externalism as simply the denial of this constraint. The strong intuitive appeal of internalism is due to the sense that we should be able to determine whether we are justified in believing something just by carefully considering the question, without the need for any further investigation. Then there is the idea that we can successfully reply to sceptical doubts about the possibility of knowledge or justified beliefs only if we can determine the epistemic status of our beliefs without presupposing anything about which sceptical doubts could be raised – the external world for example. The main objections to internalism are: (1) It assumes an unrealistic confidence in the efficacy of armchair reflection, which is often not up to surveying our entire repertoire of beliefs and other possible grounds of belief and determining the extent to which they support a given belief. (2) If we confine ourselves to what we can ascertain on reflection, there is no guarantee that the beliefs that are thus approved as justified are likely to be true. And the truth-promoting character of justification is the main source of its value. Externalism lifts this accessibility constraint, but in its most general sense it embodies no particular positive view. The most common way of further specifying externalism is reliabilism, the view that a belief is justified if and only if it was produced and/or sustained by a reliable process, one that would produce mostly true beliefs in the long run. This is a form of externalism because whether a particular belief-forming process is reliable is not something we can ascertain just on reflection. The main objections to externalism draw on internalist intuitions: (1) If the world were governed by an evil demon who sees to it that our beliefs are generally false, even though we have the kind of bases for them we do in fact have, then our beliefs would still be justified, even though formed unreliably. (2) If a reliable clairvoyant (ones who ‘sees’ things at a great distance) forms beliefs on this basis without having any reason for thinking that they are reliably formed, those beliefs would not be justified, even though they pass the reliability test.

Calligraphic Video

2010 ◽  
Vol 1 (1) ◽  
pp. 67-83 ◽  
Author(s):  
Sha Xin Wei
Keyword(s):  
Heat Flow ◽  
User Interfaces ◽  
Physical Environment ◽  
State Of The Art ◽  
Computational Physics ◽  
Graphical User Interfaces ◽  
The State ◽  
Point Of View ◽  
The World ◽  
Geometric Elements

Since 1984, Graphical User Interfaces have typically relied on visual icons that mimic physical objects like the folder, button, and trash can, or canonical geometric elements like menus, and spreadsheet cells. GUI’s leverage our intuition about the physical environment. But the world can be thought of as being made of stuff as well as things. Making interfaces from this point of view requires a way to simulate the physics of stuff in realtime response to continuous gesture, driven by behavior logic that can be understood by the user and the designer. The author argues for leveraging the corporeal intuition that people learn from birth about heat flow, water, smoke, to develop interfaces at the density of matter that leverage in turn the state of the art in computational physics.

Wilfred Batten Lewis Trotter, 1872 - 1939

1941 ◽  
Vol 3 (9) ◽  
pp. 325-344 ◽  
Keyword(s):  
Self Control ◽  
Raw Material ◽  
Good Work ◽  
Main Stream ◽  
The World ◽  
The Subject ◽  
Original Observation ◽  
Obituary Notice ◽  
Intellectual Training

The last formal address given by Wilfred Trotter, a few months before his death, was on the subject ‘Has the Intellect a function?’ His whole life gave the answer—Yes—for that rare personality was the very embodiment and outcome of intellectual training and self-control. An obituary notice of him written by a surgical colleague began with these words: ‘His death has deprived the world of one of the most contemplative minds that has ever been trained towards surgery. His penetrating intellect delighted in an impersonal activity of thought which had as raw material its own original observation of the workings of man’s mind and of the sources of their conduct. The main stream of his life ran always towards the pursuit of truth, and his interest in surgery was the joy of a fine intellect in the practice of a worthy handicraft.’ Surgery was his profession, and in it he rose to the highest mastery, becoming Sergeant Surgeon in turn to three successive Kings of England. Science gave him the test and aim of all that he regarded as good work, and the esteem of scientific men was the only honour that his ambition welcomed or would accept. Yet he made relatively few additions to that mass of verifiable knowledge which is comprised in science, and his memory will be honoured rather for the influence of his spirit and thought upon the minds of his generation.

IV. John Lingard and the Simancas Archives

1967 ◽  
Vol 10 (1) ◽  
pp. 57-76
Author(s):  
Edwin Jones
Keyword(s):  
Sixteenth Century ◽  
Point Of View ◽  
English History ◽  
Parish Priest ◽  
The Reformation ◽  
The World ◽  
History Of ◽  
The Subject ◽  
State Archives ◽  
Source Materials

John Lingard (1771–1851) was the first English historian to attempt to look at the history of England in the sixteenth century from an international point of view. He was unconvinced by the story of the Reformation in England as found in the works of previous historians such as Burnet and Hume, and believed that new light needed to be thrown on the subject. One way of doing this was to look at English history from the outside, so to speak, and Lingard held it to be a duty of the historian ‘to contrast foreign with native authorities, to hold the balance between them with an equal hand, and, forgetting that he is an Englishman, to judge impartially as a citizen of the world’. In pursuit of this ideal Lingard can be said to have given a new dimension to the source materials for English history. As parish priest in the small village of Hornby, near Lancaster, Lingard had few opportunities for travel. But he made good use of his various friends and former pupils at Douai and Ushaw colleges who were settled now in various parts of Europe. It was with the help of these friends that Lingard made contacts with and gained valuable information from archives in France, Italy and Spain. We shall concern ourselves here only with the story of Lingard's contacts with the great Spanish State Archives at Simancas.

Rheoforging of thin case for IT devices with optimal process parameters and new type die design

2013 ◽  
Vol 228 (6) ◽  
pp. 1021-1028
Author(s):  
Yong Phil Jeon ◽  
Amir Bolouri ◽  
Hyung Yoon Seo ◽  
Jong Deok Kim ◽  
Chung Gil Kang
Keyword(s):  
Mechanical Properties ◽  
Cell Phone ◽  
Processing Parameters ◽  
Die Design ◽  
Electromagnetic Stirring ◽  
Forming Process ◽  
Processing Technologies ◽  
Promising Tool ◽  
New Type ◽  
Semi Solid

The latest trend in the cell phone component industry to use aluminium and magnesium alloys has resulted in the advanced processing technologies. Semi-solid forming process that is advantageous for the mass production of thin parts with complex shapes have been of interest as a promising tool for near net-shape manufacturing. This study describes a semi-solid forming process for the development of a 1 mm-thick cell phone case by using the rheological material prepared by electromagnetic stirring equipment. Thus, a new type of die design for indirect rheoforging was proposed to efficiently control the primary α-Al phase particles in the thin part under rheological conditions. Their microstructure and mechanical properties were investigated and compared to parts produced without electromagnetic stirring. Those products fabricated by electromagnetic stirring had better mechanical properties and globular microstructures than those fabricated without electromagnetic stirring. Several processing parameters such as punch velocity (30 mm/s), punch pressure (75–250 MPa), stirring time (10 s), and solid fraction (0–20%) were used. The optimal condition that resulted in a defect-free component with the improved mechanical properties was explained and discussed.

EN AC-46500 Injected by Semi-Solid Rheocasting

2008 ◽  
Vol 141-143 ◽  
pp. 283-288 ◽  
Author(s):  
Manel Campillo ◽  
Maite T. Baile ◽  
Sergi Menargues ◽  
Antonio Forn
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Pressure ◽  
Structural Integrity ◽  
Tensile Tests ◽  
Simulation Software ◽  
Industrial Plant ◽  
Forming Process ◽  
Die Cast ◽  
Semi Solid

EN AC-46500 aluminium components are formed by Semi-Solid Rheocasting (SSR) in an industrial plant using a 700 tons high pressure machine. The dies wear was designed by the PLCO model of the ProCast simulation software. The components have had a good structural integrity and the mechanical properties after T6 treatment have been equivalent to that obtained by the same alloy by die cast. The present work describes the SSR forming process, the resulting microstructure as well as the optimization of the ageing heat treatment by hardness evolution. The results of the tensile tests make these clear.

scholarly journals The Virtual Observatory Data, Standards and Tools a technical - user point of view

2010 ◽  
Vol 6 (S277) ◽  
pp. 224-229
Author(s):  
Christian Surace ◽  
Keyword(s):  
State Of The Art ◽  
Point Of View ◽  
Virtual Observatory ◽  
Quality Of Data ◽  
Data Standards ◽  
Data Standardization ◽  
Observatory Data ◽  
The World ◽  
Set Up

AbstractIn 2002 the International Virtual Observatory Alliance (IVOA) has been created in order to gather efforts on data standardization and dissemination. Since then, the virtual Observatory allowed to spread validated data all over the world and to use data from everywhere from earth. From the standards definitions to development of tools, developers have set up a technical infrastructure used by astronomers to easily search for data and make science with all available products, more tools and more confidence on the quality of data. The goal of this review is to present the state of the art of the VO data, standards and tools. This review focuses on basic astronomer's questions : what kind of data are accessible, how to deal with these data and how to use them.

Sign in / Sign up

Export Citation Format

Share Document