A Review of Cooling Technologies for Flat Rolled Aluminium Products

2013 ◽  
Vol 765 ◽  
pp. 373-377
Author(s):  
Peter Christoforou
Keyword(s):  
Rolling Process ◽  
Basic Principles ◽  
Alternative Technologies ◽  
The Past ◽  
Industry Standard ◽  
Foil Rolling ◽  
Crucial Component ◽  
Flatness Control ◽  
Work Rolls ◽  
Rolling Technology

The basic principles of the cold and foil aluminium rolling technology used in most rolling plants today have been around for many years with the major flatness control developments taking place 30 years ago. A crucial component of this technology is the coolant and lubricant fluid used for this process. In cold and foil rolling, kerosene is used as a coolant for the work rolls and as a lubricant for the rolling process, with the aid of specific additives. A lot of alternatives have been tested in the past but the kerosene medium has remained as the industry standard. An overview of the alternative technologies is discussed.

Applications of Focused Ion Beam Technology in Bonding Failure Analysis for Microelectronic Devices

2011 ◽  
Vol 58-60 ◽  
pp. 2171-2176 ◽  
Author(s):  
Yuan Chen ◽  
Xiao Wen Zhang
Keyword(s):  
Failure Analysis ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Failure Mechanisms ◽  
Microelectronic Device ◽  
Mechanism Study ◽  
Basic Principles ◽  
The Past ◽  
Microelectronic Devices ◽  
Bonding Failure

Focused ion beam (FIB) system is a powerful microfabrication tool which uses electronic lenses to focus the ion beam even up to nanometer level. The FIB technology has become one of the most necessary failure analysis and failure mechanism study tools for microelectronic device in the past several years. Bonding failure is one of the most common failure mechanisms for microelectronic devices. But because of the invisibility of the bonding interface, it is difficult to analyze this kind of failure. The paper introduced the basic principles of FIB technology. And two cases for microelectronic devices bonding failure were analyzed successfully by FIB technology in this paper.

SPECIAL ARTICLE

PEDIATRICS ◽  
1954 ◽  
Vol 14 (6) ◽  
pp. 668-672
Author(s):  
THOMAS H. LANMAN
Keyword(s):  
Effective Means ◽  
Surgical Service ◽  
Open Thoracotomy ◽  
Basic Principles ◽  
Children's Hospital ◽  
The Past ◽  
American Academy Of Pediatrics ◽  
Children’S Hospital ◽  
Surgical Field ◽  
Heavy Mortality

IT IS a great honor to be asked to present the first William E. Ladd Lecture before the American Academy of Pediatrics. This I appreciate and as this is the first lecture in my former Chief's honor, I shall devote my time more to Doctor Ladd and what he accomplished during his long and devoted service as Chief of the Surgical Service of the Boston Children's Hospital than to the presentation of anything new. In these days of great changes in the surgical field, it is very easy to overlook or even to forget the good things that were done in the past. I said "changes" rather than advances for some of the changes of today are not advances. It is easier to appreciate the extraordinary widening in the field of surgical endeavor that has been made possible by improvements in pre- and postoperative care, anesthesia, and the more effective means to combat infection than it is to remember what was done in a previous generation without such new and valuable aids. When I began my service at the Boston Children's Hospital in 1919, most of the deaths on the Surgical Service were caused by infection. Long surgical procedures involving an open thoracotomy were impossible. Prolonged operations on the gastrointestinal tract carried a heavy mortality largely because of our lack of knowledge of fluid balance. In those earlier days, an operation that exceeded an hour in length was considered to be entering a very dangerous phase. It is well, however, to review some of the types of cases done in those days and to keep in mind that the basic principles one had to follow at that time are still valid and that the good results of today are by no means entirely due to modern methods. Let me cite a few examples.

The Two Row Wampum-Covenant Chain Tradition as a Guide for Indigenous-University Research Partnerships

2018 ◽  
Vol 19 (5) ◽  
pp. 339-359
Author(s):  
Richard W. Hill ◽  
Daniel Coleman
Keyword(s):  
New York ◽  
Indigenous Peoples ◽  
Community Based ◽  
Research Partnerships ◽  
Basic Principles ◽  
North Americans ◽  
The Past ◽  
Six Nations ◽  
Productive Research ◽  
First Time

This co-authored article examines the oldest known treaty between incoming Europeans and Indigenous North Americans to derive five basic principles to guide healthy, productive relationships between Indigenous community-based researchers and university-based ones. Rick Hill, Tuscarora artist and knowledge keeper from the Six Nations of the Grand River, publishes for the first time here the most complete oral history that exists today of that ancient treaty, from the early seventeenth century, known as the Two Row Wampum or the Covenant Chain agreement. Interspersed with Dr. Hill’s reflections, Daniel Coleman, a settler professor of English and Cultural Studies at McMaster University, outlines five principles for research partnerships derived from the discussions of the Two Row Research Partnership seminars that Hill and Coleman have been hosting at Deyohahá:ge: Indigenous Knowledge Centre for the past four years. Formed between the Hodinöhsö:ni’ confederacy and Dutch merchants arriving near Albany, New York in 1609, the Two Row Wampum-Covenant Chain treaty set the precedent for nation-to-nation treaties between European colonial powers and Indigenous peoples with two parallel rows representing the Hodinöhsö:ni’ canoe and the Dutch ship sailing down the shared river. Each party agreed to keep their beliefs and laws in their separate vessels, and on this basis of interdependent autonomy, they established a long-lasting friendship. This article suggests that by renewing our understanding of the Two Row Wampum-Covenant Chain treaty, Indigenous and non-Indigenous researchers alike can rebuild relationships of trust and cooperation that can decolonize Western presumptions and re-establish healthy and productive research partnerships.

scholarly journals Numerical discretization analysis of a HTR steam generator model for the thermal-hydraulics code trace

2014 ◽  
Vol 29 (suppl.) ◽  
pp. 31-38 ◽  
Author(s):  
Markus Esch ◽  
Dietrich Knoche ◽  
Antonio Hurtado
Keyword(s):  
High Temperature ◽  
Steam Generator ◽  
Electricity Production ◽  
Thermal Hydraulics ◽  
The Past ◽  
Crucial Component ◽  
High Temperature Reactor ◽  
Different Diameters ◽  
Typical Design ◽  
Steam Generator Model

For future high temperature reactor projects, e. g., for electricity production or nuclear process heat applications, the steam generator is a crucial component. A typical design is a helical coil steam generator consisting of several tubes connected in parallel forming cylinders of different diameters. This type of steam generator was a significant component used at the thorium high temperature reactor. In the work presented the temperature profile is being analyzed by the nodal thermal hydraulics code TRACE for the thorium high temperature reactor steam generator. The influence of the nodalization is being investigated within the scope of this study and compared to experimental results from the past. The results of the standard TRACE code are compared to results using a modified Nusselt number for the primary side. The implemented heat transfer correlation was developed within the past German HTR program. This study shows that both TRACE versions are stable and provides a discussion of the nodalization requirements.

scholarly journals The Practice of General Data Protection Regulations Fine and Penalty on Google Inc. vs CNIL Case

2020 ◽  
Vol 2 (1) ◽  
pp. 1-7
Author(s):  
Maskun ◽  
Rian Nugraha
Keyword(s):  
Data Protection ◽  
National Development ◽  
Basic Principles ◽  
Legal Development ◽  
The Past ◽  
Starting Point ◽  
General Data ◽  
The Republic ◽  
Development Paradigm ◽  
Research Show

Pancasila experiences ups and downs of development, not due to the weakness of the values contained therein, but rather leads to inconsistencies in its application. In line with the acceptance of the truth of noble values of Pancasila then drove the flow and spirit to make Pancasila as a paradigm. History also noted how from the past until now Pancasila often get a challenge that resulted in the crisis for the existence of the Indonesian nation. The challenge faced by Pancasila as the view of life and the foundation of the state is always directly proportional to the challenges faced by the Unitary State of the Republic of Indonesia as a whole. Paradigm is actually a way of view, values, methods, basic principles to solve a problem faced by a nation into the future. The results of research show First, Philosophically the essence of Pancasila as the paradigm of legal development contains a consequence that all aspects of legal development within the framework of national development should be based on the nature of Pancasila values; Secondly, As a legal development paradigm, Pancasila wants that development in society becomes the starting point of the existence of a legal product.

scholarly journals QUOTES BUDI UTOMO SEBAGAI SARANA PENGUAT KESADARAN NASIONAL

2019 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Brigida Intan Printina
Keyword(s):  
Research Method ◽  
Basic Principles ◽  
The Past ◽  
Technological Developments ◽  
Qualitative Descriptive ◽  
Visual Graphic

This article aims to describe the Budi Utomo Quotes Based on Canva Applications for National Awareness Strengthens. In order for the struggle of the Budi Utomo movement to be interpreted in depth by generations, the visual graphic media was chosen to strengthen the national awareness of the generation. This is in line with the basic principles of Budi Utomo's movement, namely the primacy of mind or mind in terms of education. The research method in this article is qualitative descriptive. The writing results describe the process and results of the use of visual graphic media that photographed Budi Utomo's movement with the aim of strengthening the national awareness of Indonesian youth so as to be able to integrate past struggles as a capital "repeating the glory of the past" through education. The hope with this article is that observers of history are able to implement historical learning easily and can adjust technological developments, but without losing their identity as a cultured nation.

scholarly journals RECENT ADVANCES IN ENVIRONMENTAL PROTECTION OF OIL POLLUTED SURFACE AND GROUNDWATER IN THE NIGERIAN CONTEXT

2020 ◽  
Vol 6 (3) ◽  
pp. 0416-0420 ◽  
Author(s):  
Joshua Ighalo ◽  
Adewale George Adeniyi ◽  
Kevin Shegun Otoikhian
Keyword(s):  
Environmental Protection ◽  
Petroleum Industry ◽  
Research Area ◽  
Research Trend ◽  
Policy Enforcement ◽  
Alternative Technologies ◽  
The Past ◽  
Recent Advances ◽  
Proper Perspective ◽  
Surface And Groundwater

Over the years, Nigerian researchers in environmental engineering and chemistry have been evaluating a variety of technologies for the remediation of petroleum industry polluted surface and groundwater. In this mini-review, the recent advances in this regard over the past two years were evaluated. This was done as an appraisal of research efforts to understand the current research trend and gain a proper perspective of the required/needed future approach in the research area. It was observed that most studies are still focusing on evaluating the problems instead of finding actual solutions. Development of workable and novel solutions are urgently needed. It can be in the form of better remediation techniques or via the development of alternative technologies for utilizing the waste/pollutant materials. The paper has given a clear opinion on the progress of environmental protection and sustainability in the Nigerian context. The environmental regulations scenario in the country is marred by malpractices and corruption more stringent policy enforcement will help in the achievement of environmental protection.

Finite Element Analysis of Transient Thermal Problems of Work Rolls in Hot Rolling Process

1999 ◽  
Author(s):  
James D. Lee ◽  
Majid T. Manzari ◽  
Yin-Lin Shen ◽  
Wenjun Zeng
Keyword(s):  
Finite Element ◽  
Hot Rolling ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Rolling Process ◽  
Thermal Problem ◽  
Element Analysis ◽  
Hot Rolling Process ◽  
Transient Thermal ◽  
Work Rolls

Abstract The three-dimensional transient thermal problem of work rolls in the entire hot rolling process has been formulated. It includes the time-varying boundary conditions specified at the roll surface taking the schedule of both rolling and idling cycles into consideration. The corresponding finite element equations are derived and solved by the Runge-Kutta-Verner method. The finite element solutions indicate that the temperature variations in the circumferential direction are overwhelming. Case studies unveil the thermal characteristics of the work rolls in various kinds of mill operations. Numerical results are presented and compared with Guo’s analytical solutions.

Cloud Based 3D Printing Business Modeling in the Digital Economy

2020 ◽  
pp. 116-135
Author(s):  
Norman Gwangwava ◽  
Albert U Ude ◽  
Enock Ogunmuyiwa ◽  
Richard Addo-Tenkorang
Keyword(s):  
3D Printing ◽  
Business Model ◽  
Global Economy ◽  
Business Models ◽  
Virtual Community ◽  
Business Case ◽  
The Past ◽  
Business Model Canvas ◽  
Industry Standard ◽  
3D Printers

3D printing, also known as additive manufacturing, is becoming the industry standard for manufacturing and prototyping. Although the technology is very old, it gained a huge traction in the past two decades. 3D printing favors unique once-off orders (mass customization) in contrast to mass production. This calls for innovative business models in order to realize economic gains from the technology. Increased product innovations in the global economy also contribute to wide adoption of 3D printing unlike in the old days. A transition in the manufacturing field has brought e-manufacturing and now cloud-based manufacturing. Machines, including 3D printers, in the past were not Internet-enabled but modern designs have the capability of Internet connectivity. Cloud-based 3D printing is a new model of design that has a significant impact on today's entrepreneurs. This article focuses on a business case for a cloud-based approach in consumer product niches. A cloud-based 3D printing business model (3D-Cloud) is developed based on the business model canvas, which promises major breakthroughs in e-entrepreneurship innovation. The model uses a virtual community approach to bring together technocrats, enthusiasts, and shared 3D printer facilities of common interests, whilst promoting an enterprising spirit.

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