Bell Laboratories

Documents about Bell Laboratories

	RR90-07a NYU, ECON 1990 Excerpt: ... Hierarchy: The Economics of Managing Roy Radner AT&T Bell Laboratories , Murray Hill, NJ and New York University ABSTRACT In today's industrialized nations, a significant fraction of economic activity takes place in large firms, many of them with thousands or even hundreds of thousands of employees. Given the large size of these firms, and given the limitations on individuals' capacities for information-processing and decisionmaking, it is obvious that the labor of managing must be divided among many persons in the firm. In the U.S., more than a third of all employees may be working full-time in activities that are part of or in support of - the management process. By the "economics of managing" I mean the consideration of the resources that go into the activities of managing, and the ways in which different organizations of managing do a better or worse job of economizing those resources and produce better or worse results. In these lectures I review some contributions of economic theory to the study of the ...
	23511-23521 Pittsburgh, SUPER 7 Excerpt: ... How Advances in Science Are Made Douglas Osheroff Stanford University Stanford Matters Stanford Day - East Bay 11 March 2006 By their very nature, those discoveries that most change the way we think about nature cannot be anticipated. How, then, are such discoveries made, and is there a set of research strategies that can increase the chances of our making such a discovery? A Linked Chain of Discoveries and Inventions 1853-1926 Heike Kammerlingh Onnes Nobel Prize for Physics 1913 1853-1926 Gilles Holst Relevant Research Strategies Use the best instrumentation available Dont re-invent: Borrow the technologies you can Look in an unexplored region of the landscape Failure might be an invitation to try something new Be aware of subtle unexplained behavior, dont dismiss it! 1894-1984 NL 1978 1954 Columbia University Charles Townes Jim Gordon The Ammonia Maser II > Maser parametric amplifier Townes Nobel Prize 1964 Karl Jansky At Bell Laboratories in 1933 190 ...
	3.31 Astro 1 Section 1 Professor Brandt Penn State, ASTRO 1 Excerpt: ... g with a radio telescope at Bell Laboratories in New Jersey. They were trying to improve America's phone system. They needed to measure the brightness of the sky at microwave/radio frequencies but they kept getting a peculiar source of "noise" in their radio dish. They couldn't understand this and wanted to get rid of it. Tried checking system components moving pigeons out of radio telescope cleaning pigeon droppings. Didn't get rid of noise - they found that the sky was "glowing" in microwaves - uniform in all directions. Penzias and Wilson didn't understand what they had found - talked to people at Bell Labs and Princeton. Found out that theorists had predicted such radiation to be left over from Big Bang as early as 1948. This radiation started out at about 3000K but cooled as Universe expanded. Wavelength was stretched to cooler temperatures. Penzias and Wilson won the 1978 Nobel Prize. Since its discovery the cosmic microwave background has been studied extensively. Because it can tell us important t ...
	ece264sp09_lec1_intro UMass Dartmouth, ECE 264 Excerpt: ... Standard library (vectors, strings, algorithms) Polymorphism (derived classes, virtual functions, abstract classes) Templates ECE 264: Lecture 1 8 05/01/09 C vs. C+ History of C Evolved from BCPL and B Developed by Dennis Ritchie ( Bell Laboratories ) Development language of UNIX Hardware independent Can write portable programs ANSI/ISO 9899: 1990 ANSI and ISO standard for C published in 1990 History of C+ Extension of C Developed by Bjarne Stroustrup ( Bell Laboratories ) in early 1980s Provides new features to "spruce up" C Provides capabilities for object-oriented programming Objects: reusable software components Model items in the real world Easier to understand, correct and modify Object-oriented programs 9 Why objectoriented programming? Object orientation A natural way of thinking about the world and computer programs Models real-world objects in software Models communication among objects Encapsulates attributes and operations (behaviors) Object-or ...
	payne SC State, YR 1 Excerpt: ... SOUTH CAROLINA STATE UNIVERSITY RADIO ASTRONOMY PAIR TEAM MICHAEL COLLINGWOOD DURWYN DUNCAN WILLIE JENKINS ERICA LAMAR MENTOR: DR. JAMES PAYNE WHAT IS ASTRONOMY ? FOUR MAJOR TYPES OF ASTRONOMY X RAY ASTRONOMY OPTICAL ASTRONOMY INFRARED ASTRONOMY RADIO ASTRONOMY RADIO IR VISIBLE X RAY WHAT IS RADIO ASTRONOMY? A NEW KIND OF EYES ELECTROMAGNETIC RADIATION FREQUENCY 5 MHZ TO 300 GHZ WAVELENGTH 100 M TO 1 MM TELESCOPES SATELLITE DISHES TO TV ANTENNAS MOST GALAXIES ARE NOT STRONG RADIO SOURCES HISTORY 1931- KARL JANSKY - BELL LABORATORIES STUDYING RADIO FREQUENCY FROM STORMS 1937 - GORTE REBER - PROTOTYPE PUBLISHED RADIO SKY MAP IN 1944 ONLY RADIO ASTRONOMER UNTIL END OF WORLD WAR II 1965 - PENZIAS AND WILSON - 2.7 K BRIEF OVERVIEW OF RESEARCH SOURCES STAR SOURCES PULSAR OUR SUN GALATIC AND EXTRAGALATIC RADIO GALAXIES, QUASARS, BLASARS PLANETARY JOVIAN SYSTEM 82 FOOT DIAMETER TELESCOPES THE PAIR TEAM AND THE LITTLE BITTY RADIOTELES ...
	20040920 University of Dayton, CPS 150 Excerpt: ... s buggy code - John Backus, developer of FORTRAN at IBM, delivered a memorable Turing award acceptance speech advocating the abandonment of imperative programming languages like FORTRAN, for which his was receiving the award, in favor of functional programming languages (languages largely w/o variables and assignment). - there are several programming paradigms - imperative: C - object-oriented (really an extension of imperative paradigm): Smalltalk, C+, Java - logic: Prolog, CLIPS - functional: Lisp, Scheme, ML, Haskell - you'll study all these topics in CPS 343 History of C+ - developed by Bjarne Stroustrup at AT&T Bell Laboratories in the early 1980s - evolved from C (the + creates a nice pun!) - developed by Dennis Ritche at Bell Laboratories - originally implemented on a DEC PDP-11 computer in 1972 - evolved from B - developed by Ken Thompson at Bell Laboratories - Ken Thompson used B to develop early version of the UNIX OS in 1970 on a ...
	Lec_01 UT Arlington, CSE 13102 Excerpt: ... ness processing ALGOL ALGOrithmic Language Used widely in Europe, scientific processing Attempts were made to produce a "universal" language, that could be all things to all people. Two notable failures: PL/1 (Programming Language 1) Developed by IBM ALGOL 68 Developed by an international committee of computer scientists Lecture 1, Slide 4 of 5 History of C Mid 1970's, a team at Bell Laboratories were working on operating system design( this became UNIX ) Wanted a high-level language that still had low-level control constructs Kernighan and Ritchie developed the C language Mid 1980's, object-oriented capabilities were added to C, created the language C+ ( essentially C+ is a superset of C) Lecture 1, Slide 5 of 5 ...
	lecture4 CUNY Baruch, CSI 31 Excerpt: ... Introduction to C+ C programming language: - developed by Dennis Ritchie of AT&T Bell Laboratories (1970s) - used for writing and maintaining the UNIX operating system - general-purpose language for writing any sort of program - high-level language with many features of low-level language: - programs can directly manipulate the computer's memory (low-level language feature) - easy to read and write in C (high-level lenguage feature) - doesn't have as many automatic checks as some other high-level languages In early 1980s Bjarne Stroustrup of AT&T Bell Laboratories developed C+. Most of C is a subset of C+, so most C programs are also C+ programs + C+ has facilities to do object-oriented programming Testing and Debugging A mistake in the program is usually called a bug The process of eliminating bugs is called debugging Kinds of Program Errors: syntax error e.g. omitting a semicolon, a curly bracket, . (violations of the gramma rules) compiler will give us an error message run-time error detected ...
	HonorsVLA Colorado, HONR 1001 Excerpt: ... The Very Large Array: Interferometer Radio Telescope Characteristics of the VLA of San Augustin, NM Located in the Plains Used by astronomers and also for satellite tracking, atmospheric and weather studies, and other sciences 27 parabolic radio antennas, each 25 meters in diameter and weighing 230 tons! Uses interferometry to combine data from all 27 dishes and create a very high resolution picture 4 different configurations, rearranged every 4 months Angular resolution as smallthe VLA arc seconds Aerial View of as .04 Interferometry Combines data from all receivers to form interference patterns Structure of source can be determined by differences in patterns as the earth rotates Fourier Transform: Process that uses interference patterns to create maps History Radio Astronomy: Nicola Tesla in Colorado Springs (1900) Karl Guthe Jansky with Bell Laboratories (1930s) Interferometry: Bolton and Gordon Stanley at Caltechwork with Sea Interferometers Martin Ryles group in Cambridge (1946) History Th ...
	lecture01s UWO, SS 4864 Excerpt: ... 1 Statistical Computing: Lecture 01 What is statistical computing? What are you going to learn from this course? Main components of statistical computing Nature of R Download and install R and its Packages What is statistical computing? What are you going to learn from this course? Statistical programming skills Statistical graphics 2 Implement new statistical procedures Learn to use dierent statistical software If time permits, some SQL database queries and introduction to data mining Main components of statistical computing 1. Data manipulation 2. Programming 3. Graphics 3 Nature of R R is a system for statistical computation and graphics. It consists of a language a run-time environment with R is an interpreted language: R is based on S language which is a very high level language and an environment for data analysis and graphics developed at Bell Laboratories S-Plus a value-added version of S sold by Insightful, Inc. R is an ...
	3690 in-class test description Maple Springs, SOCI 3690 Excerpt: ... In-class Test (worth 20%) The test will take place on March 10 and will involve answering 2 short questions (worth 5% each), and one longer essay question (worth 10%). Questions will cover the readings, lectures and visual contents of the entire cour ...
	techreview-shane Georgia Tech, ECE 4007 Excerpt: ... High Speed Object Tracking Introduction As systems of automation, specifically in the world of robotics, become faster, there is an increasing need to track objects at higher speeds than ever before. From autonomous cars watching the road to missiles and planes guided by high speed computer vision analysis, the quicker computer vision processing becomes, the more time there is to make artificial intelligence decisions based on that analysis. However, not all designers choose the same solution to the tracking problem. Some rely strictly on visual analysis while others combine other sensory inputs such as ultrasonics or infrared trip wires. This paper analyzes a mix of hardware and software controls used in robotic systems to track objects at high velocities and looks into their applicability in high speed game playing robots. Historical Implementations Perhaps one of the first game playing robots to make use of a tracking system was a designed by AT&T Bell Laboratories to play table tennis against a human oppo ...
	AD-HOC George Mason, ECE 2005 Excerpt: ... terature 1.David W. Carman, Peter S. Kruus, Brian J. Matt, "Constraints and approaches for Distributed Sensor network security", NAI Labs, The Security Research Division Network Associates, September 2001. 2. B.Clifford Neuman, Theodore, "Kerberos: An Authentication Service for Computer Networks", ISI Research Report, September 1994. 3.Hartono Kurnio, Huaxiong Wang, Josef Pieprzyk, Kris Gaj,"Securing Multicast Groups in Ad Hoc Networks". 4.S.M.Bellovin, M.Merritt, "Limitations of the Kerberos Authentication System", AT&T Bell Laboratories 5.Yee Wei Law, Sandro Etalle, Pieter Hartel,"Key Management with Group-Wise PreDeployed keying and Secret Sharing Pre-Deployed Keying",University of Twente, July 2002. 6.M.V.D. Burmester,Y.Desmedt. "A Secure and Efficient Conference Key Distribution System", In A. D. Santis, editor, Advances in Cryptology - EUROCRYPT '94, volume 950 of Lecture Notes in Computer Science, pages 275-286. Springer-Verlag, 1995. 7.Frank Stajano and Ross Anderson, The Resurrecting Duckling: S ...
	market-B Berkeley, FIND 06 Excerpt: ... PROJECT SUMMARY Collaborative Research: NeTS-FIND: Market-Enabling Network Architecture PI: Jean Walrand, University of California, Berkeley Co-PI: Venkat Anantharam, University of California, Berkeley PI: John Musacchio, University of California, Santa Cruz PI: Shyam Parekh, Bell Laboratories , Lucent Technologies There is a substantial mismatch between todays needs and the network architecture. The Internet was designed for best eort connectivity among friendly users with no commercial interests. Today, the network is used for important commercial and security activities, it is plagued by malicious intruders, and its evolution is driven by economic interests of providers. Economic aspects are essential in the design of the future architecture as they stimulate or inhibit development and implementation of technological solutions. Todays network fails to develop markets for services and security. Because of these limitations, the interests of providers and users are misaligned. Suitable architecture ...
	tqc2007_poster UCLA, TQC 2007 Excerpt: ... mut Beige (University of Leeds), Nicholas Bonesteel (Florida State University), Sankar Das Sarma (University of Mar yland), Paul Fendley (University of Virginia), Matthew Fisher (UC Santa Barbara), Eduardo Fradkin (University of Illinois at Urbana-Champaign), Louis Kauffman (University of Chicago), Alexei Kitaev (Caltech), Michael Levin (MIT), Chetan Nayak (UCLA), Nick Read (Yale University), Kareljan Schoutens (Universiteit van Amsterdam), Kirill Shtengel (UC Riverside), Steve Simon (Lucent Technologies Bell Laboratories ), Ady Stern (Weizmann Institute of Science), Kevin Walker (Microsoft Research), Zhenghan Wang (Indiana University), Birgitta Whaley (UC Berkeley). participation Additional information about this workshop including links to register and to apply for funding can be found on the webpage listed below. Encouraging the careers of women and minority mathematicians and scientists is an important component of IPAM's mission, and we welcome their applications. www.ipam.ucla.edu/programs/tqc2007 IPAM ...
	readme TCU, BJONES 20263 Excerpt: ... pp-lecture The PowerPoint slides in this folder are designed to be used to support lectures on the textbook contents. They include the text figures plus bulleted lists and other slides that reflect the narrative. Some instructors choose to post the ...
	StudyGuideS08C Illinois Tech, MATH 149 Excerpt: ... <STUDYGUIDES08C.TXT> {5-9-2008} Math 149 Spring 2008 Final Study Guide, Part III - Chapter 6 Concept Check, p. 378: 1,2,3,4,5 Exercises: 1-6, 7-11, 12-16 Chapter 9 Concept Check, p. 598: 1 Exercises: 1, 3a, 7 ...
	lecture3 CUNY Baruch, CSI 3 Excerpt: ... Object-Oriented Programming (OOP) Program is viewed as a collection of interacting objects Programming in OOP style designing the objects and the algorithms they use Main characteristics of OOP: - encapsulation - inheritance - polymorphism classes a kind of data type combining data and algorithms (in C+) example: Geometric figure color draw triangle rectangle sides a, b, c width w length l equilateral triangle side a square side s isosceles triangle circle radius r sides a, b Introduction to C+ C programming language: - developed by Dennis Ritchie of AT&T Bell Laboratories (1970s) - used for writing and maintaining the UNIX operating system - general-purpose language for writing any sort of program - high-level language with many features of low-level language: - programs can directly manipulate the computer's memory (low-level language feature) - easy to read and write in C (high-level lenguage feature) - doesn't have as many automatic checks as some other highlevel languages In early 1980s ...
	intro Georgia Tech, CS 4803 Excerpt: ... n how to design an empirical study ! ! Whats the question Whats the right way to answer that question Two main techniques: Interviewing and Observation Other techniques: Collecting Artefacts, Drawing Sketches, Logs What do you do with the data when youve collected it? ! Learn how to gather data ! ! ! Learn how to analyse data ! About the Instructor Who am I? ! ! New(ish) faculty member started Fall 2004 Graduated from University of California, Irvine ! ! PhD 1996 in Information and Computer Science Worked for Bell Laboratories and Xerox PARC Several 100 interviews: managers, employees, teenagers, parents Observation: 6 months full time to 2.5 years part time to complete ! ! Experience with empirical methods ! ! Ill use these to show how the methods apply to real world problems ! Project ! Talk about the project throughout the class, and then well do it! About the Instructor Oh, and. ! Im English (& British) ! Hence the accent and also the spelling ! ! ! Extra us in ce ...
	BIOL 3114 Lab 1 Texas Brownsville, BIOL 3114 Excerpt: ... Laboratory 1: Phyla Porifera and Cnidaria (Class Hydrozoa) LABORATORY ONE INVERTEBRATE ZOOLOGY - BIOLOGY 3114 PHYLA PORIFERA and CNIDARIA (CLASS HYDROZOA) Please read over the appropriate chapters and/or pages on the Phyla Porifera and Cnidaria (cla ...
	QualiteReferences Cal Poly, IND 2501 Excerpt: ... entation. Second Edition, McGraw-Hill, NY. Myers, R.H., Montgomery, D.C. (1995), Response Surface Methodology : Process and Product Optimization Using Designed Experiments, John Wiley & Sons Inc. _ Bernard Clment, PhD Bibliographie Qualit novembre 2001 page 1 O'Connor, Patrick, D. T. (1995). Practical Reliability Engineering, Third Edition, Pande, P. S., Neuman, R. P., Cavanagh, R. R.(2000). The Six Sigma Way, McGraw-Hill., NY. Pyzdek, Thomas (1999). The Complete Guide to Six Sigma, QA Publishing, Tucson, AZ. Phadke, Madhav, S (1989) Quality Engineering Using Robust Design, AT&T Bell Laboratories . ReVelle, J., Moran, J. Cox, J. (1998). The QFD Handbook, John Wiley & Sons, NY Shingo, Shigio,(1987) Le systme SMED, Les ditions d'organisation. Scherkenback, William, W. (1991). Deming's Road To Continual Improvement., SPC Press, Knoxville, TE. Schmidt, S.R., Launsby, R.G. (1992), Understanding Industrial Designed ...
	Reference_Qualite Cal Poly, IND 3501 Excerpt: ... Provost, L.P. (1999), Improving Quality through Planned Experimentation. 2nd edition, McGraw-Hill, NY. Myers, R.H., Montgomery, D.C. (1995), Response Surface Methodology : Process and Product Optimization Using Designed Experiments, John Wiley & Sons Inc. O'Connor, Patrick, D. T. (1995). Practical Reliability Engineering, Third Edition, Pande, P. S., Neuman, R. P., Cavanagh, R. R.(2000). The Six Sigma Way, McGraw-Hill., NY. Pyzdek, Thomas (1999). The Complete Guide to Six Sigma, QA Publishing, Tucson, AZ. Phadke, Madhav, S (1989) Quality Engineering Using Robust Design, AT&T Bell Laboratories . ReVelle, J., Moran, J. Cox, J. (1998). The QFD Handbook, John Wiley & Sons, NY Shingo, Shigio,(1987) Le systme SMED, Les ditions d'organisation. Scherkenback, William, W. (1991). Deming's Road To Continual Improvement. SPC Press, Knoxville, TE. Schmidt, S.R., Launsby, R.G. (1992), Understanding Industrial Designed Experiments, 4th ed. Air Academy Press. Scholtes, Peter. (1992). The Team Handbook, Joiner Associates, W ...
	ITch0_2007 NCTU, EE IEE6533 Excerpt: ... blications of Shannon A Mathematical Theory of Communication, I, II, published in Bell Syst. Tech. J, 1948, pp.379-423, 623-656. Communication Theory of Secrecy Systems, published in BSTJ, 1949, pp.656-715. Coding Theorems for a Discrete Source with a Fidelity Criterion, IRE Nat. Cov. Rec. Part 4, 1959, pp.142-163. Paperback edition of "The Mathematics Theory of Communication" was published by University of Illinois Press, 1963. 32,000 copies have been sold up to 1964. In a review of the accomplishments of Bell Labs. in communication science, Millman in his edited book (1984), "A history of engineering and science in the Bell system: Communication Science (1925-1980)" says: "Probably the most spectacular development in communication mathematics to take place at Bell Laboratories was the formulation in the 1940's of in11 formation theory by C. E. Shannon." In his 1948 articles on information theory, Shannon credits J.W. Tukey (a professor at Princeton Univ.) with suggesting the word "bit" as a measure of info ...
	cs100_1 Mt. Holyoke, XLI 100 Excerpt: ... your classmates but not homework solutions Give me prompt feedback! Computer science is a fast-growing field q q q Computing power (BOLData mini pc, booksize,1.9lbs) Programming languages Applications & on-going research n Impacts of computer science on society and our daily life q q Communication: email, instant messenger, blogs, teleconferencing. Banking, shopping, learning& teaching . n Career opportunities Chapter 0: Introduction Chapter 0: The Origins of Computing Machines The Role of Algorithms Relationship with Other Subjects n n n 2 Figure 0.3 An Abacus n Origins of Computing Machines Early computing devices q q Abacus: positions of beads represent numbers Gear-based machines (1600s-1800s) n n Positions of gears represent numbers Blaise Pascal, Wilhelm Leibniz, Charles Babbage Figure 0.4 The Mark I computer n Early Computers Based on mechanical relays q q 1940: Stibitz at Bell Laboratories 1944: Mark I: Howard Aiken and IBM at Harvard 1937-1941: Atanasoff-Berry at Iowa State ...
	PN junction diode experiment RPI, BU 471 Excerpt: ... junction diode in detail. He fabricated the first practical junction diodes by diffusing n- and p - type impurities into germanium in the 1940's at Bell Laboratories , the famous research laboratory of the American Bell Telephone System. Not surprisingly, the equation governing the pn junction is called the Shockley equation. The Shockley equation gives the diode current as a function of the diode voltage and it can be written in different ways Dp D I = I p (x n = 0) I n (x p = 0) = e A pn + n np Ln Lp Dp pn0 L p pn0 Dn np0 eV / kT Ln np0 eV / kT e e = eA + 1 = e A + 1 Ln n Lp p ( ) ( ) = Is e eV / kT 1 ( ) (1) We will not discuss the Shockley equation here and the students are referred to their lecture notes. However, here are some "warm-up questions" that the student should be familiar with: 1. The doping concentration does not show up in Eq. (1). Rewrite the Shockley equation so that the role of the doping concentration becomes clear. 2. How does the saturation current dep ...