School of Mines & Metallurgy
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2000 Stainless Steels: an Introduction to Their Metallurgy and Corrosion
Dairy, Food and Environmental Sanitation, Vol. 20, No. 7, Pages 506-517 Copyright© International Association for Food Protection, 6200 Aurora Ave., Suite 200W, Des Moines, IA 50322 Stainless Steels: An Introduction to Their Metallurgy and Corrosion Resistance Roger A. Covert and Arthur H. Tuthill* and why they sometimes do not. In most cases, selection of the proper stainless steel leads to satisfactory performance. COMPOSITION, NOMEN- CLATURE AND GENERAL PROPERTIES Most metals are mixtures of a primary metallic element and one or more intentionally added other ele- This article has been peer-reviewed by two professionals. ments. These mixtures of elements are called alloys. Stainless steels are alloys, as are brasses (copper + zinc), bronzes (copper + tin), the many alu- INTRODUCTION better understanding of stainless minum alloys, and many other me- Worldwide, in industry, in busi- steels, especially to the non-metal- tallic materials. In general, solid ness and in the home, metals called lurgist. metals and alloys consist of randomly stainless steels are used daily. It is Industries are concerned with oriented grains that have a well-de- important to understand what these integrity of equipment and product fined crystalline structure, or lattice, materials are and why they behave purity. To achieve these, stainless within the grains. In stainless steels, the way they do. This is especially steels are often the economical and the crystalline structures within the true because the word “stainless” is practical materials of choice for pro- grains have been given names such as itself somewhat of a misnomer; these cess equipment. However, before ferrite, austenite, martensite, or a materials can stain and can corrode intelligent decisions can be made mixture of two or more of these. -
Organocatalytic Asymmetric N-Sulfonyl Amide C-N Bond Activation to Access Axially Chiral Biaryl Amino Acids
ARTICLE https://doi.org/10.1038/s41467-020-14799-8 OPEN Organocatalytic asymmetric N-sulfonyl amide C-N bond activation to access axially chiral biaryl amino acids Guanjie Wang1, Qianqian Shi2, Wanyao Hu1, Tao Chen1, Yingying Guo1, Zhouli Hu1, Minghua Gong1, ✉ ✉ ✉ Jingcheng Guo1, Donghui Wei 2 , Zhenqian Fu 1,3 & Wei Huang1,3 1234567890():,; Amides are among the most fundamental functional groups and essential structural units, widely used in chemistry, biochemistry and material science. Amide synthesis and trans- formations is a topic of continuous interest in organic chemistry. However, direct catalytic asymmetric activation of amide C-N bonds still remains a long-standing challenge due to high stability of amide linkages. Herein, we describe an organocatalytic asymmetric amide C-N bonds cleavage of N-sulfonyl biaryl lactams under mild conditions, developing a general and practical method for atroposelective construction of axially chiral biaryl amino acids. A structurally diverse set of axially chiral biaryl amino acids are obtained in high yields with excellent enantioselectivities. Moreover, a variety of axially chiral unsymmetrical biaryl organocatalysts are efficiently constructed from the resulting axially chiral biaryl amino acids by our present strategy, and show competitive outcomes in asymmetric reactions. 1 Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China. 2 College -
The Neolithic Copper Melting Crucibles from Switzerland
In: A. Shortland, I. Freestone and Th. FromRehren mine (eds) to microbe 2009, From Mine to Microscope, 155-162 155 Chapter 15 From mine to microbe – the Neolithic copper melting crucibles from Switzerland Th. Rehren1 Abstract The occurrence of chalcopyrite in several late Neolithic crucibles from NW Switzerland and SW Germany has been variously interpreted as indicating evidence for local copper smelting, or being due to post-depositional phenomena. This study uses optical microscopy and a discussion based on textural and micro-stratigraphical arguments to demonstrate that chalcopyrite is a late formation and not indicative of copper smelting. This has significant implications for the technological and archaeological interpetation of these finds, but also illustrates the potential of image-based studies in science-based archaeology. Introduction these cultures back into line with their neighbours. The emergence and spread of metallurgy in Europe Only after a further half a millennium or so metal- is a major concern of archaeological and archaeo- lurgy emerges again in Central Europe, heralding the metallurgical research. In the 1960s scholars such as beginning of the Bronze Age throughout the Contin- Renfrew and Branigan focused their attention – and ent. This time, it is a broad and sustained develop- consequently that of others – on the role which metals ment with no particular emphasis on the Swiss or have played in the development of stratified societies southwest German regions. and the emergence of elites, showing off with their It is against this background that the crucible access to these new materials. The Balkans and fragments of the Pfyn culture have attracted attention Western Asia are now both known to have had for more than a century, having been found at a wide metallurgically competent Neolithic cultures, and range of sites and representing certainly several issues of technology transfer and autochthonous dozen different vessels. -
Systematic Code
So r a id a r e t h e s t r ide s made b ,, p y s c ie nc e in t h is p r o g r e s s ive ag e a nd s o bo u ndle s s is it s r a ng e th a t t h o s e wh o vi e w it s c a r e e r fr o m wi t h o u t find g r e a t diffic u lty in fo llo wi ng it s dive r s e a nd int r ic a t e p a t h -ways ; wh i le t h o s e wh o h a ve s e c u r e d a fo o ting with in t h e s a me r o a d a r e o f t en q u i t e u na bl e t o ke e p p a c e with it s fle e t mo ve me nt s a nd wo u ld fa in r e t ir e r t h u a l nt es t I t is no t s u r f o m e u neq c o . pr is i ng t h en t h a t t h o s e a c t u a lly c o nt r i dva n e me nt o s c ie nc e bu t ing t o th e a c f , ‘ p r es s ing e ag e r ly u pwa r d a nd o nwar d ' s h o u ld neg le c t t o lo o k ba c k u p o n t h e labo r s o f t h o s e wh o p r e c e de th e m a nd s h o u ld s o me t ime s l o s e s igh t o f th e o bli g a t i o ns wh ic h s c ie nc e o wes t o fo r g o t t en r t “ g e ne a io ns . -
Is EE Right for You?
Erik Jonsson School of Engggineering and The Un ivers ity o f Texas a t Da llas Computer Science Is EE Right for You? • “Toto, I have a feeling we’re not in Kansas anymore.” • Now that you are here, diii?id you make the right choice? • Electrical engineering is a challenging and satisfying profession. That does not mean it is easy. In fact, with the possible exceptions of medicine or law, it is the MOST difficult. • There are some things you need to consider if you really, really want to be an engineer. • We will consider a few today. EE 1202 Lecture #1 – Why Electrical Engineering? 1 © N. B. Dodge 01/12 Erik Jonsson School of Engggineering and The Un ivers ity o f Texas a t Da llas Computer Science Is EE Right for You (2)? • Why did you decide to be an electrical engineer? – Parents will pay for engineering education (it’s what they want). – You like math and science. – A relative is an engineer and you like him/her. – You want to challenge yourself, and engineering seems challenging. – You think you are creative and love technology. – You want to make a difference in society . EE 1202 Lecture #1 – Why Electrical Engineering? 2 © N. B. Dodge 01/12 Erik Jonsson School of Engggineering and The Un ivers ity o f Texas a t Da llas Computer Science The High School “Science Student” Problem • In high school, you were FAR above the average. – And you probably didn’t study too hard, right? • You liked science and math, and they weren’t terribly hard. -
Robotics Engineer
CONTENTS Robotics Engineer at a Glance 6 Introduction 7 Turning Science Fiction into Reality Chapter One 11 What Does a Robotics Engineer Do? Chapter Two 18 How Do You Become a Robotics Engineer? Chapter Three 26 What Skills and Personal Qualities Matter Most —and Why? Chapter Four 31 What Is It Like to Work as a Robotics Engineer? Chapter Five 37 Advancement and Other Job Opportunities Chapter Six 42 What Does the Future Hold for Robotics Engineers? Chapter Seven 49 Interview with a Robotics Engineer Source Notes 53 Find Out More 56 Index 59 Picture Credits 63 About the Author 64 5 ROBOTICS ENGINEER AT A GLANCE te’s Ba cia che so ee de lo As gr gr r’s de ee l D o r o o o t d c h n e t c o a le g s r r m a e a h v t o e l i e g i p u i q H d e Personal Minimum Educational Qualities Requirements Problem solving Creativity Working Conditions Attention to detail Indoors Strong science, math, and computer- programming skills Median Salary $81,591 Percent job increase by 278,000* 2024 Number of jobs *Numbers are for mechanical 5% engineers, a group that includes robotics engineers. Future Job Outlook Source: Bureau of Labor Statistics, Occupational Outlook Handbook. www.bls.gov. 6 CHAPTER 3 What Skills and Personal Qualities Matter Most—and Why? First and foremost, robotics engineers must be very good prob- lem solvers. They must have suffi cient technical skill to recognize and understand a problem and enough creativity to think up an original solution. -
Photonic Design Engineer
Photonic Design Engineer Are you looking for the ultimate startup challenge? Have you always wanted to transform innovative technology into real products? Are you ready to join OPTIUS among the first employees with all the advantages and opportunities? Optius is a new startup with the vision to transform the field of efficient AI computations by using optical computing. By joining OPTIUS, you are contributing to a growing team of motivated entrepreneurs and researchers passionate about bringing this vision into reality. The Photonic Design Engineer role will involve the design, optimization, and layout of photonic integrated circuits (PICs) and photonic devices. Your opportunity and benefits: • Solve problems by commercializing cutting edge technology – Major impact! • Mentorship, coaching and support – we are here for you! • Cool Startup environment – celebrations, endless lattes, healthy snacks What we offer: • Competitive compensation package • Opportunity for growth and personal development • Insurance benefits such as health, dental and vision • Cool Startup environment – celebrations, endless coffee, healthy snacks • Lunch and Learns What your day-today will look like: • Design and optimize photonic integrated circuits (PIC’s) • Layout photonic devices with common EDA • Conduct numerical electromagnetic simulation of photonic devices • Interacting with photonic foundries to understand design environment and rules • Designing optical bench experiments for device characterization • Collaborating with the team on research and development -
Position Description
position description Date: September 2017 Title: Engineer 1 Department: Biomedical Engineering School: Case School of Engineering Location: Bingham 308 Supervisor Name and Title: Ron Triolo, Professor POSITION OBJECTIVE Under general supervision, perform engineering objectives as a member of multidisciplinary research and development teams designing and investigating new medical devices and restorative technologies, and provide high level computing infrastructure support. Responsible for microprocessor, mobile device, or computer based software system design, testing and operation on specific research and development projects for new assistive technologies for individuals with neuro-musculo-skeletal disabilities, limb loss or cognitive dysfunction. The engineer will apply methods and techniques, adjust and correlate data, determine errors in results, and follow the operation through a series of related steps to completion. ESSENTIAL FUNCTIONS 1. Develop embedded control and operating systems for new and emerging assistive technologies and medical devices, and create both low and high level user and clinician interfaces. (20%) 2. Set system processing specifications, design and verify software operation of new computer- microprocessor- or mobile computing platform-based assistive technologies. (20%) 3. Construct embedded applications and integrate information from networks of distributed sensors in new medical devices. (20%) 4. Identify the work to be done to fulfill project requirements and objectives, plan and carry out the procedural and technical steps required, seek assistance as needed, independently coordinate work efforts with outside parties, and characteristically submit only completed work. (10%) 5. Design, maintain and interrogate databases for research-related operational information. (10%) 6. Fully document, test and validate design and system performance according to standard design controls and quality system practices, including incident reporting, error/bug tracking and repair, and version/release control. -
Engineer I/Ii/Iii
ENGINEER I/II/III DEFINITION Under direct and general supervision, performs professional civil engineering work in the planning, design, technical investigation, inspection, and construction of projects in several areas of public works and civil engineering, and performs related work as required. SUPERVISION RECEIVED AND EXERCISED Receives general supervision from assigned supervisory and managerial staff. Exercises no direct supervision of staff. CLASS CHARACTERISTICS Engineer I/II/III is a flexibly-staffed class series. Advancement from the Engineer I level to the II level is at the discretion of the appointing authority, provided that the following criteria are met: (1) the minimum qualifications and time-in-grade requirements, (2) demonstration of the ability to independently perform the full scope of the assigned duties. Advancement from the Engineer II level to the III level is at the discretion of the appointing authority, provided that the following criteria are met: (1) the minimum qualifications and time-in-grade requirements, (2) demonstration of the ability to independently perform the full scope of the assigned duties. Engineer I is the entry level engineer classification. Incumbents perform less complex office and field civil engineering work under direct supervision in preparation for advancement to the journey level of Engineer II. Engineer II is the advanced level class in the engineering series, not requiring registration. Positions in this class are flexibly staffed and are normally filled by advancement from the lower class of Engineer I, or if filled from the outside, require prior professional level experience and possession of an Engineer-in- Training Certificate. Incumbents in this class work under general direction and perform moderately difficult professional engineering work in civil engineering. -
Reliable Determination of Amidicity in Acyclic Amides and Lactams Stephen A
Article pubs.acs.org/joc Reliable Determination of Amidicity in Acyclic Amides and Lactams Stephen A. Glover* and Adam A. Rosser Department of Chemistry, School of Science and Technology, University of New England, Armidale, NSW 2351, Australia *S Supporting Information ABSTRACT: Two independent computational methods have been used for determination of amide resonance stabilization and amidicities relative to N,N-dimethylacetamide for a wide range of acyclic and cyclic amides. The first method utilizes carbonyl substitution nitrogen atom replacement (COSNAR). The second, new approach involves determination of the difference in amide resonance between N,N-dimethylacetamide and the target amide using an isodesmic trans-amidation process and is calibrated relative to 1-aza-2-adamantanone with zero amidicity and N,N-dimethylace- tamide with 100% amidicity. Results indicate excellent coherence between the methods, which must be regarded as more reliable than a recently reported approach to amidicities based upon enthalpies of hydrogenation. Data for acyclic planar and twisted amides are predictable on the basis of the degrees of pyramidalization at nitrogen and twisting about the C−N bonds. Monocyclic lactams are predicted to have amidicities at least as high as N,N-dimethylacetamide, and the β-lactam system is planar with greater amide resonance than that of N,N- dimethylacetamide. Bicyclic penam/em and cepham/em scaffolds lose some amidicity in line with the degree of strain-induced pyramidalization at the bridgehead nitrogen and twist about the amide bond, but the most puckered penem system still retains substantial amidicity equivalent to 73% that of N,N-dimethylacetamide. ■ INTRODUCTION completed by a third resonance form, III, with no C−N pi Amide linkages are ubiquitous in proteins, peptides, and natural character and on account of positive polarity at carbon and the or synthetic molecules and in most of these they possess, electronegativity of nitrogen, must be destabilizing. -
Ceramic Engineering Building
CERAMIC ENGINEERING BUILDING UNIVERSITY OF ILLINOIS URBANA CHAMPAIGN, ILLINOIS Description of the Building and Program of Dedication, December 6 unci 7, 1916 THE TRUSTEES THE PRESIDENT AND THE FACULTY OF THIS UNIVERSITY OF ILLINOIS CORDIALLY INVITE YOU TO ATTEND THE DEDICATION OF THE CERAMIC ENGINEERING BUDUDING ON WEDNESDAY AND THURSDAY DECEMBER SIXTH AND SEVENTH NINETEEN HUNDRED SIXTEEN URBANA. ILLINOIS CERAMIC ENGINEERING BUILDING UNIVERSITY OF ILLINOIS URBANA - - CHAMPAIGN ILLINOIS DESCRIPTION OF BUILDING AND PROGRAM OF DEDICATION DECEMBER 6 AND 7, 1916 PROGRAM FOR THE DEDICATION OP THE CERAMIC ENGINEERING BUILDING OF THE UNIVERSITY OF ILLINOIS December 6 and 7> 1916 WEDNESDAY, DECEMBER 6 1.30 p. M. In the office of the Department of Ceramic Engineering, Room 203 Ceramic Engineering Building Meeting of the Advisory Board of the Department of Ceramic Engineering: F. W. BUTTERWORTH, Chairman, Danville A. W. GATES Monmouth W. D. GATES Chicago J. W. STIPES Champaign EBEN RODGERS Alton 2.30-4.30 p, M. At the Ceramic Engineering Building Opportunity will be given to all friends of the University to inspect the new building and its laboratories. INTRODUCTORY SESSION 8 P.M. At the University Auditorium DR. EDMUND J. JAMBS, President of the University, presiding. Brief Organ Recital: Guilnant, Grand Chorus in D Lemare, Andantino in D-Flat Faulkes, Nocturne in A-Flat Erb, Triumphal March in D-Flat J. LAWRENCE ERB, Director of the Uni versity School of Music and University Organist. PROGRAM —CONTINUED Address: The Ceramic Resources of America. DR. S. W. STRATTON, Director of the Na tional Bureau of Standards, Washington, D. C. I Address: Science as an Agency in the Develop ment of the Portland Cement Industries, MR. -
The Evolution of Engineering Materials
Paper ID #20611 The Evolution of Engineering Materials Dr. Amber L. Genau, University of Alabama at Birmingham Dr. Amber Genau is an assistant professor in the Materials Science and Engineering Department at the University of Alabama at Birmingham. She received her B.S. and M.S. from Iowa State University and Ph.D. from Northwestern University, all in materials engineering. Before coming to UAB, Dr. Genau spent two years as a guest scientist at the German Aerospace Center in Cologne, Germany, working on metal solidification and microstructural characterization. She is particularly interested in broadening participation in engineering and providing international experiences and perspectives to undergraduate students. c American Society for Engineering Education, 2017 The Evolution of Engineering Materials Abstract This paper describes the development of an upper level engineering elective entitled “The Evolution of Engineering Materials.” The course considers how the discovery of new materials and the ability of process materials in new ways has influenced the course of history, shaping both human societies and their surrounding environments, from the Stone Age to the Modern Era. Students become familiar with a variety of still-relevant technical content through the consideration of historical activity, from smelting and coking to polymerization reactions and cross linking. The course addresses a variety of ABET outcomes while also supporting the development of global competency through an increased appreciation of world history. Although this course was developed for and taught in the context of a three-week study abroad trip to Europe, the engaging and accessible nature of the content could also make it valuable as a service course for non-engineering majors.