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Aremco—High Temperature Solutions
High Temperature Solutions Since 1965, our success has been a result of this simple business strategy: • Understanding Customer Requirements. • Providing Outstanding Service and Support. • Producing High Quality Technical Materials and Equipment. • Solving Difficult Technical Problems. CONTENTS Technical Bulletin Page No. A1 Machinable & Dense Ceramics .......................................................... 2 A2 High Temperature Ceramic & Graphite Adhesives ....................... 6 A3 High Temperature Ceramic-Metallic Pastes .................................12 A4 High Temperature Potting & Casting Materials ...........................14 A5-S1 High Temperature Electrical Coatings & Sealants ......................18 A5-S2 High Temperature High Emissivity Coatings ................................20 A5-S3 High Temperature Thermal Spray Sealants ..................................22 A5-S4 High Temperature Coatings for Ceramics, Glass & Quartz ......24 A5-S5 High Temperature Refractory Coatings .........................................26 A6 High Temperature Protective Coatings ..........................................28 A7 High Performance Epoxies ................................................................34 A8 Electrically & Thermally Conductive Materials .............................36 A9 Mounting Adhesives & Accessories ................................................38 A10 High Temperature Tapes ...................................................................42 A11 High Temperature Inorganic Binders..............................................44 -
Developing Sound Spatialization Tools for Musical Applications with Emphasis on Sweet Spot and Off-Center Perception
Sweet [re]production: Developing sound spatialization tools for musical applications with emphasis on sweet spot and off-center perception Nils Peters Music Technology Area Department of Music Research Schulich School of Music McGill University Montreal, QC, Canada October 2010 A thesis submitted to McGill University in partial fulfillment of the requirements for the degree of Doctor of Philosophy. c 2010 Nils Peters 2010/10/26 i Abstract This dissertation investigates spatial sound production and reproduction technology as a mediator between music creator and listener. Listening experiments investigate the per- ception of spatialized music as a function of the listening position in surround-sound loud- speaker setups. Over the last 50 years, many spatial sound rendering applications have been developed and proposed to artists. Unfortunately, the literature suggests that artists hardly exploit the possibilities offered by novel spatial sound technologies. Another typical drawback of many sound rendering techniques in the context of larger audiences is that most listeners perceive a degraded sound image: spatial sound reproduction is best at a particular listening position, also known as the sweet spot. Structured in three parts, this dissertation systematically investigates both problems with the objective of making spatial audio technology more applicable for artistic purposes and proposing technical solutions for spatial sound reproductions for larger audiences. The first part investigates the relationship between composers and spatial audio tech- nology through a survey on the compositional use of spatialization, seeking to understand how composers use spatialization, what spatial aspects are essential and what functionali- ties spatial audio systems should strive to include. The second part describes the development process of spatializaton tools for musical applications and presents a technical concept. -
Under Water Optical Wireless Communication
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 02 | Feb -2017 www.irjet.net p-ISSN: 2395-0072 Under Water Optical Wireless Communication Smruti Goswami1, Ravi Patel2 1ME Student, Dept of EC Engineering, SVBIT, Gujarat, India 2 Assistant Professor, Dept of EC Engineering, SVBIT, Gujarat, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract-Underwater absorption, scattering and turbulence can be used to carry images, thus allowing viewing in tight processes will introduce attenuation and fading to light spaces. Specially designed fibers are used for a variety of propagation and then degrade the performance of underwater other applications, including sensors and fiber lasers wireless optical communications (UWOC). As power In fibers, there are two significant sections – the core and the cladding. The core is part where the light rays travel and the consumption is an important issue in under- water missions, it cladding is a similar material of slightly lower refractive index to is fundamental to minimize the intensity loss by reducing the cause total internal reflection. Usually both sections are fabricated beam divergence , data transmission in relatively high from silica (glass). The light within the fiber is then continuously turbidity waters appeals for the use of energy-efficient totally internally reflected along the waveguide. modulations and powerful channel codes at the -
Fluidized Bed Chemical Vapor Deposition of Zirconium Nitride Films
INL/JOU-17-42260-Revision-0 Fluidized Bed Chemical Vapor Deposition of Zirconium Nitride Films Dennis D. Keiser, Jr, Delia Perez-Nunez, Sean M. McDeavitt, Marie Y. Arrieta July 2017 The INL is a U.S. Department of Energy National Laboratory operated by Battelle Energy Alliance INL/JOU-17-42260-Revision-0 Fluidized Bed Chemical Vapor Deposition of Zirconium Nitride Films Dennis D. Keiser, Jr, Delia Perez-Nunez, Sean M. McDeavitt, Marie Y. Arrieta July 2017 Idaho National Laboratory Idaho Falls, Idaho 83415 http://www.inl.gov Prepared for the U.S. Department of Energy Under DOE Idaho Operations Office Contract DE-AC07-05ID14517 Fluidized Bed Chemical Vapor Deposition of Zirconium Nitride Films a b c c Marie Y. Arrieta, Dennis D. Keiser Jr., Delia Perez-Nunez, * and Sean M. McDeavitt a Sandia National Laboratories, Albuquerque, New Mexico 87185 b Idaho National Laboratory, Idaho Falls, Idaho 83401 c Texas A&M University, Department of Nuclear Engineering, College Station, Texas 77840 Received November 11, 2016 Accepted for Publication May 23, 2017 Abstract — – A fluidized bed chemical vapor deposition (FB-CVD) process was designed and established in a two-part experiment to produce zirconium nitride barrier coatings on uranium-molybdenum particles for a reduced enrichment dispersion fuel concept. A hot-wall, inverted fluidized bed reaction vessel was developed for this process, and coatings were produced from thermal decomposition of the metallo-organic precursor tetrakis(dimethylamino)zirconium (TDMAZ) in high- purity argon gas. Experiments were executed at atmospheric pressure and low substrate temperatures (i.e., 500 to 550 K). Deposited coatings were characterized using scanning electron microscopy, energy dispersive spectroscopy, and wavelength dis-persive spectroscopy. -
Unit – 1 Overview of Optical Fiber Communication
www.getmyuni.com Optical Fiber Communication 10EC72 Unit – 1 Overview of Optical Fiber communication 1. Historical Development Fiber optics deals with study of propagation of light through transparent dielectric waveguides. The fiber optics are used for transmission of data from point to point location. Fiber optic systems currently used most extensively as the transmission line between terrestrial hardwired systems. The carrier frequencies used in conventional systems had the limitations in handling the volume and rate of the data transmission. The greater the carrier frequency larger the available bandwidth and information carrying capacity. First generation The first generation of light wave systems uses GaAs semiconductor laser and operating region was near 0.8 μm. Other specifications of this generation are as under: i) Bit rate : 45 Mb/s ii) Repeater spacing : 10 km Second generation i) Bit rate: 100 Mb/s to 1.7 Gb/s ii) Repeater spacing: 50 km iii) Operation wavelength: 1.3 μm iv) Semiconductor: In GaAsP Third generation i) Bit rate : 10 Gb/s ii) Repeater spacing: 100 km iii) Operating wavelength: 1.55 μm Fourth generation Fourth generation uses WDM technique. i) Bit rate: 10 Tb/s ii) Repeater spacing: > 10,000 km Iii) Operating wavelength: 1.45 to 1.62 μm Page 5 www.getmyuni.com Optical Fiber Communication 10EC72 Fifth generation Fifth generation uses Roman amplification technique and optical solitiors. i) Bit rate: 40 - 160 Gb/s ii) Repeater spacing: 24000 km - 35000 km iii) Operating wavelength: 1.53 to 1.57 μm Need of fiber optic communication Fiber optic communication system has emerged as most important communication system. -
Vodacom and GSN Digital: Two Companies, Two Continents, and Two Managers in the Technology Industry
MGMT-E-4100 Team 5 Vodacom and GSN Digital Vodacom and GSN Digital: Two Companies, Two Continents, and Two Managers in the Technology Industry By: Thembani C. Nkomo Harvard University This paper will compare and contrast Vodacom and GSN Digital through the eyes of their middle management. It will examine the company structures, values, and cultures and analyze each manager’s values and management approach. Focusing on the individual managerial styles, this paper will look at the effect on their teams and working environment, and how their styles support the company’s business needs. [Type text] [Type text] [Type text] `Vodacom and GSN Digital: Two Companies, Two Continents, and Two Managers in the Technology Industry by Thembani Nkomo VODACOM AND GSN DIGITAL: TWO COMPANIES, TWO CONTINENTS, AND TWO MANAGERS IN THE TECHNOLOGY INDUSTRY TABLE OF CONTENTS 1 INTRODUCTION ................................................................................................... 1 2 COMPANIES AND INDUSTRY ............................................................................ 1 2.1 VODACOM ........................................................................................................... 1 2.1.1 Telecom Industry Overview .......................................................................... 1 2.1.2 Vodacom as a Company ............................................................................... 2 2.1.3 Vodacom Organizational Structure .............................................................. 2 2.1.4 Company Values ......................................................................................... -
Optically Controlled Microwave Devices and Circuits: Emerging Applications in Space Communications Systems
NASA Technical Memorandum 89869 1 ,' Optically Controlled Microwave Devices and Circuits: Emerging Applications in Space Communications Systems (EASA-T?l-E986S) CEIXCALLP CC h16CLLED N87-2 3900 EXBCISIVE DEVXES 1I&C ClECCIlS: EE1EEGI:IG AEELICATXOIS XI SFACE CCUIUEICIIICIS SPSlZLlS (bASA) 11 p AZLvail: 611s HC AO;/BF A01 Uoclas CSCL 09A H1/33 0079452 Kul B. Bhasin and Rainee N. Simons Lewis Research Center Cleveland, Ohio Prepared for the 1987 International Microwave Symposium cosponsored by the Brazilian Microwave Society and IEEE-MTT Rio de Janeiro, Brazil, July 27-30, 1987 OPTICALLY CONTROLLED MICROWAVE DEVICES AND CIRCUITS: EMERGING APPLICATIONS IN SPACE COMMUNICATIONS SYSTEMS Kul 6. Bhasin and Rainee N. Simons" National Aeronautics and Space Administration Lewis Research Center Cleveland, Ohio 44135 SUMMARY Optically controlled microwave devices and circuits, either directly illu- minated or interfaced by an optical fiber, have the potential to simplify signal distribution ne.tworks in high frequency space communications systems. In this paper the optical response of GaAs/GaAlAs HEMT and GaAs MESFET micro- wave devices is presented when directly illuminated by an optical beam. Mono- M e- lithic integration of optical and microwave functions on a single gallium Lo M arsenide substrate is considered to provide low power, low loss and reliable wI digital and analog optical links for control and signal distribution. The use of optically controlled microwave devices as photodetectors, to provide gain control of an amplifier, and to injection lock an oscillator in phased array antenna applications is shown. INTRODUCTION As the operating frequency and speed of solid state devices and circuits increase, their applications in advanced space communications systems will require innovative solutions to control and interconnect these devices and circuits. -
Acrylic Polymer Transparencies
Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 4-1972 Acrylic Polymer Transparencies Inez Allen Kendrick Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Art Education Commons, Art Practice Commons, and the Interdisciplinary Arts and Media Commons Let us know how access to this document benefits ou.y Recommended Citation Kendrick, Inez Allen, "Acrylic Polymer Transparencies" (1972). Dissertations and Theses. Paper 1554. https://doi.org/10.15760/etd.1553 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible: [email protected]. AN ABSTRACT OF T.HE THESIS OF Inez Allen Kendrick tor the Master ot Science in Teaching in Art presented April 26, 1972. TITLE: Acrylic Polymer Transparencies. APPROVED BY MEMBERS 01' 'lBE THESIS COMMITTEE: Richard J. ~asch, Chairman ~d B. Kimbrell Robert S. Morton Brief mentions by three writers on synthetic painting media first intrigued my interest in a' new technique of making transparent acrylic paintings on glass or plexiglas supports, some ot which were said to I I simulate stained-glass windows. In writing this paper on acrylic polymer'", transparencies, 'my problem was three-told: first. to determine whether any major recognized works of art have been produced by this, method; second, to experiment with the techni'que and materials in order to explore their possibilities for my own work; and third, to determine whether both materials and methods would be suitable for use in a classroom. -
Fiber Optic Communications
FIBER OPTIC COMMUNICATIONS EE4367 Telecom. Switching & Transmission Prof. Murat Torlak Optical Fibers Fiber optics (optical fibers) are long, thin strands of very pure glass about the size of a human hair. They are arranged in bundles called optical cables and used to transmit signals over long distances. EE4367 Telecom. Switching & Transmission Prof. Murat Torlak Fiber Optic Data Transmission Systems Fiber optic data transmission systems send information over fiber by turning electronic signals into light. Light refers to more than the portion of the electromagnetic spectrum that is near to what is visible to the human eye. The electromagnetic spectrum is composed of visible and near -infrared light like that transmitted by fiber, and all other wavelengths used to transmit signals such as AM and FM radio and television. The electromagnetic spectrum. Only a very small part of it is perceived by the human eye as light. EE4367 Telecom. Switching & Transmission Prof. Murat Torlak Fiber Optics Transmission Low Attenuation Very High Bandwidth (THz) Small Size and Low Weight No Electromagnetic Interference Low Security Risk Elements of Optical Transmission Electrical-to-optical Transducers Optical Media Optical-to-electrical Transducers Digital Signal Processing, repeaters and clock recovery. EE4367 Telecom. Switching & Transmission Prof. Murat Torlak Types of Optical Fiber Multi Mode : (a) Step-index – Core and Cladding material has uniform but different refractive index. (b) Graded Index – Core material has variable index as a function of the radial distance from the center. Single Mode – The core diameter is almost equal to the wave length of the emitted light so that it propagates along a single path. -
448 Part 2—Frequency Alloca- Tions and Radio Treaty
Pt. 2 47 CFR Ch. I (10–1–10 Edition) comments and following consultation with llllllllllllllllllllllll the SHPO/THPO, potentially affected Indian Chairman tribes and NHOs, or Council, where appro- Date lllllllllllllllllllll priate, take appropriate actions. The Com- Advisory Council on Historic Preservation mission shall notify the objector of the out- come of its actions. llllllllllllllllllllllll Chairman XII. AMENDMENTS Date lllllllllllllllllllll The signatories may propose modifications National Conference of State Historic Pres- or other amendments to this Nationwide ervation Officers Agreement. Any amendment to this Agree- llllllllllllllllllllllll ment shall be subject to appropriate public Date lllllllllllllllllllll notice and comment and shall be signed by the Commission, the Council, and the Con- [70 FR 580, Jan. 4, 2005] ference. XIII. TERMINATION PART 2—FREQUENCY ALLOCA- TIONS AND RADIO TREATY MAT- A. Any signatory to this Nationwide Agreement may request termination by writ- TERS; GENERAL RULES AND REG- ten notice to the other parties. Within sixty ULATIONS (60) days following receipt of a written re- quest for termination from a signatory, all Subpart A—Terminology other signatories shall discuss the basis for the termination request and seek agreement Sec. on amendments or other actions that would 2.1 Terms and definitions. avoid termination. B. In the event that this Agreement is ter- Subpart B—Allocation, Assignment, and minated, the Commission and all Applicants Use of Radio Frequencies shall comply with the requirements of 36 CFR Part 800. 2.100 International regulations in force. 2.101 Frequency and wavelength bands. XIV. ANNUAL REVIEW 2.102 Assignment of frequencies. 2.103 Federal use of non-Federal fre- The signatories to this Nationwide Agree- quencies. -
NORTHWESTERN UNIVERSITY Ototheatre
NORTHWESTERN UNIVERSITY Ototheatre: Learning to Listen and Perform in Sonically Augmented Spaces A DISSERTATION SUBMITTED TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENTS for the degree DOCTOR OF PHILOSOPHY Field of Theatre and Drama By Lauren R. Beck EVANSTON, ILLINOIS December 2017 2 © Copyright by Lauren R. Beck 2017 All Rights Reserved 3 Abstract Ototheatre: Learning to Listen and Perform in Sonically Augmented Spaces Lauren R. Beck This dissertation explores a form of performance I call “ototheatre,” which is a mobile and participatory audience experience executed with portable sound technology. Ototheatre is an emergent artistic form that sits at a convergence of contemporary technologies and audience consumption habits. Case studies, including smartphone applications and new theatrical works incorporating novel uses of sound technology, reveal the antecedents and characteristics of this form of theatre. I explore the methods by which these works create intimate, interactive theatrical experiences that extend modes of audience experience. Podcasts are a new media practice that have multiple theatrical antecedents and ototheatrical potential. I analyze a particularly theatrical podcast, choreographer Hofesh Shechter’s Everyday Moments, to show new possibilities for individual modes of performance scripted by podcast artists for solo listening. I trace a genealogy that includes the théâtrophone, radio drama, and the downloadable podcast to demonstrate how the recorded voice has long been creating remote theatrical experiences for audiences through the use of mediatized sound technology. While radio has been called a “theatre of the mind,” I argue that podcasts can create an intimate, post-humanistic theatre of the body. I examine artistic sound works that are related to the audio tour to explore ways of mapping space with sound. -
Thermal Runaway Severity Reduction Assessment for EVA Li-Ion Batteries
https://ntrs.nasa.gov/search.jsp?R=20150018568 2019-08-31T06:01:42+00:00Z Thermal Runaway Severity Reduction Assessment For EVA Li-ion Batteries By Eric Darcy/NASA-JSC For 2014 JSC Connect Event Energy Storage & Management 24 Sept 2014 Team and Contents 2 • NASA Engineering Safety Center Lead Effort – Paul Shack, Assessment Lead – Chris Iannello, NESC Technical Fellow for Electrical Power – Steve Rickman, NESC Technical Fellow for Passive Thermal – Eric Darcy, Test Lead for EVA Batteries, NASA-JSC – Sam Russell, Mike Fowler, Judy Jeevarajan, Craig Clark, John Weintritt, Christina Deoja and Stacie Cox/NASA-JSC – Rob Button, Tom Miller, Penni Dalton/NASA-GRC – Dan Doughty, Bruce Drolen, Ralph White, Gary Bayles, and Jim Womack/NESC Consultants • Agenda – Background on the EVA batteries – Motivation and objectives – Trigger method selected and why – Assessments of current designs – Verification of subscale mitigation measures – Full scale LREBA with those measures leads to failure – Consequence of cell TR ejecta products to TR propagation – Full scale LREBA with adjacent cells protected from cell vent path – Bank test to verify benefits of cell fusing – Lessons learned to date Background - Li-ion Rechargeable EVA Battery Assembly (LREBA) 1 9P-5S Array of Samsung 2.6Ah 18650 cells to power the spacesuit helmet lights and camera and glove heaters Background – Li-ion Pistol Grip Tool Battery • 10-cell Li-ion 18650 battery – 10S for discharge – 2P-5S for charge • Battery is enclosed in tool holster except for end with the D-latch Background