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Stewart D. Personick

Stewart D. Personick is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Stewart D. Personick rather than just read about it. In short: Stewart David Personick (born 1947) is an American researcher in telecommunications and computer networking. He worked at Bell Labs, TRW, and Bellcore (now Telcordia Technologies), researching optical fiber receiver design, propagation in multi-mode optical fibers, time-domain reflectometry, and the end-to-end modeling of fiber-optic communication systems.

Key takeaways

  • Stewart D. Personick belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Stewart D. Personick to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Stewart D. Personick from memory before moving on to harder problems.

Reference excerpt

Stewart David Personick (born 1947) is an American researcher in telecommunications and computer networking. He worked at Bell Labs, TRW, and Bellcore (now Telcordia Technologies), researching optical fiber receiver design, propagation in multi-mode optical fibers, time-domain reflectometry, and the end-to-end modeling of fiber-optic communication systems.

Biography Personick was born in Brooklyn in 1947 and attended the Bronx High School of Science. He graduated from the City College of New York with bachelor of electrical engineering degree in 1967 and joined Bell Laboratories. He obtained an SM degree in 1968 and Sc.D degree in 1970 from MIT with support from Bell Laboratories. His dissertation was on analog communication over quantum channels. At Bell Labs Personick conducted early research in fiber optics technology, including publication of papers on optical receiver design, applications of optical amplifiers, and propagation in multi-mode optical fibers with mode coupling. Some of his early analysis developed a model that included what became known as "the Personick integrals" as basic parameters for the capacity of optical systems. His research was used in early fiber-optic system field tests, including a 1976 experiment in Atlanta, Georgia, and the 1977 Chicago lightwave communication project, which demonstrated the technical and economic viability of optical fiber systems. In 1976 he invented the first practical optical time-domain reflectometer, a test instrument that became heavily used in the fiber optics industry. From 1978 through 1983, Personick was a manager at TRW Inc. He managed organizations responsible for research and development of commercial telecommunications transmission and switching equipment, and organizations responsible for US federal government-funded research applications of optical communication technologies. In 1983 Personick joined Bell Communications Research (Bellcore). There, he managed organizations responsible for the creation of new telecommunications technologies. These included: fiber-to-the-home, asymmetric digital subscriber line, Integrated Services Digital Network, the Intelligent Network (customized call processing applications that depend upon customer-specific data stored in centralized “services control points”), wireless telecommunications networks, and packet-switched public telecommunications network services, including acting as the interface between the traditional telecommunications industry and the emerging Internet access industry. He managed systems engineering organizations, ranging in size from 150 to 400 and research organizations ranging in size from 100 to 150 persons. He helped shape telecommunications research policy through participation in national level committees such as the Federal Networking Council, and by influencing executives of the telecommunications industry. He initiated external government-funded research projects at Bellcore as an additional source of research funding. In 1993 he predicted social changes from the technology progress. Personick joined Drexel University's ECE department of electrical engineering and computer science on September 1, 1998, as the first E. Warren Colehower Chair Professor of Telecommunications, and as the first director of Drexel's Center for Telecommunications and Information Networking. He acquired and managed more than $30 million in externally funded research contracts over 5 years. His research and teaching included calculating the channel capacity of optical fiber. and optical switching, an application of photonics. In 2003 Personick was appointed a member of the US Federal Communications Commission’s Technological Advisory Council. The council met approximately quarterly to discuss technology-related topics of interest to the FCC, in the context of airing issues and making recommendations to the FCC and the FCC's Office of Engineering and Technology. The TAC's last meeting was held in July 2006. Personick served on the board of directors for Optical Communications Products, Inc. from November 2000 through October 2007, when it was acquired by Oplink Communications. Personick joined New Jersey Institute of Technology's department of electrical and computer engineering on February 18, 2008, as the first Ying Wu Endowed Chair in Wireless Telecommunications until 2011. From September 1, 2011, to December 31, 2012, Personick was a senior university lecturer at NJIT.

Honors Personick was elected a fellow of the Optical Society of America in 1988 in recognition of distinguished service in the advancement of optics. He received the John Tyndall Award, sponsored by the Optical Society of America (OSA) and the IEEE Lasers and Electro-Optics Society (LEOS), for career achievements and contributions to the field of optical fiber communications in April 2000. Personick became a Fellow of the Institute of Electrical and Electronics Engineers (IEEE), in 1983 for contributions to the theory and application of optical fiber systems, and an IEEE Centennial Medal in 1984. At various times Personick served as IEEE Communications Society journal editor, board of governors, director of publications, VP for member affairs, and representative on the steering committee of the Optical Fiber Communication conference. He was the technical program committee co-chair of the 1983 Optical Fiber Communication conference, general co-chair of the 1985 Optical Fiber Communication conference, and member and chair of the John Tyndall Award committee. Personick was elected a member of the US National Academy of Engineering (NAE) in 1992. He served on the US NAE Board on Army Science and Technology, member and chairman of other US NAE committees and panels. He co-edited a report on "Critical Information Infrastructure Protection and the Law" published by the United States National Research Council in 2003. He received a career achievement award from Engineering Alumni of the City College of New York in 1998.

Works

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Worked examples

Example 1 — a first encounter with Stewart D. Personick

Start with the simplest possible case. Write down what Stewart D. Personick claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Stewart D. Personick before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Stewart D. Personick ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Stewart D. Personick

In research
Stewart D. Personick appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Stewart D. Personick in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Stewart D. Personick is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1947 births, Drexel University faculty, Fellows of the IEEE, so understanding it makes those chapters shorter.
In everyday life
Look for Stewart D. Personick outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Stewart D. Personick in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Stewart D. Personick means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Stewart D. Personick out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Stewart D. Personick in simple terms?

Stewart David Personick (born 1947) is an American researcher in telecommunications and computer networking. He worked at Bell Labs, TRW, and Bellcore (now Telcordia Technologies), researching optical fiber receiver design, propagation in multi-mode optical fibers, time-domain reflectometry, and th…

Why does Stewart D. Personick matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Stewart D. Personick?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Stewart D. Personick.

Tags

  • 1947 births
  • Drexel University faculty
  • Fellows of the IEEE
  • IEEE Centennial Medal laureates
  • Living people
  • Massachusetts Institute of Technology alumni
  • Members of the United States National Academy of Engineering
  • New Jersey Institute of Technology faculty
  • Scientists at Bell Labs

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