Contributors to This Issue RW. Coons, Wester leer Company, 1842-194 Bell Labor. tories, 1845. Mr. Coons ns works! mainly on the design and Calibration of procsion impedance measuring equipment. He wa also involved in the design of microwave adjustable attenuator for the TH frequency bard, Recentiy he bes been working ona bridge applique to Cony that wil provide improv aeruniey fram 2 to SD MIE ‘Narain Gehani, B, Tech, 1969, Inign Insitute of Technology; MS. 19%, Ph.D. Computer science), 1975, Corel University, State University of Now ork at Buffalo, 1975-197% Rell Laboratories, 1978 From September 1575 to June 1878, Mr Gehani was an ‘Assistont Professor at State University of New York ae Butfalo. His research and coneutting interests include programming methodology land language design, alice automation, concurrent programming, pro- fram correctness, compiler, data slmivire, and Speciation tech- rigues, 0, dohnsen, Diploma in BF. 1974, Ph.D. 1979, Eoolo Polytoch- nique Felorale de Lausanne, Switzerland; Foule Polytechnique Fels ral de Lausanne, 1974-197; Bell Taboratories, 1979— Me Johnsen tras asistent at the Sir! Processing Laboratory af the Ecole Poly- technique Federale de Lausanne, working inthe fla of picture coding ‘At Hell Laboratories, av a tmeraber of the Visual Communications Research Department, he i involved in research in picture processing and coding and in cormaunicstion systems Cory Myers, B.S, M.S, (electrical engineering and computer oe ‘enced 190, Mesoachusels: Intille of Technology, Cambridge: Bell Laboratories, 1077. At Bell eborssoris, Mre Myers intially worked. tn computer sapien, digit cuit cdesisn and dynamic programming Forapecch recognition. He ie currently i che digi aignal processing froup, wheye his ineresc include xperch processing, recognition, and Aiital signal processing. Kurt Nassau, D.Sc. (physics and chemistry), 1948, University of Bristol, Englands Ph.D. (chemistry), 1958, Caiveraly of Pitaarg Glyco Products Co,, Inc, Williamsport, Pa, 945-1064; Walter Red Army Medical Contar, Washington, DC, 1964-1966; Bell Laboratories, 1969, Ho has worked in the arene of erystal chemistry, Inscrs ferrosleetric and related crystals, cryatl growth and the claifietion tf the role of convertion i Czochralski paling, Uno origin of color in crystals including irradiation-induced colors, and the proparation of nove glasses by rapid quenching, Currently he is investigating glass, for longedistance optical waveguides. Member, American Choral Sorety, American Crystallographic Assocation, American Assocation for Crystal Growth, Phi Lambde Upsilon; Fellow, Mineralogical Sock ty of America ‘Arun N. Netravall, B. Tech, (Honors), 1967, Indian Insitute of ‘Technology, Bombay, India; MS, 1969, PhD. (eletrcal engineering) 1970, Rive University; Optimal Dats Corporation, 1970-1972; Bel TLaboataric, 1972. Mr, Netraval has worked on problems related te filtering, guidance, and control forthe space shutile, At Bel Labo- tories he has worked on various aspects of signal processing. He ik presently Hew of the Visual Communication Research Department land n Visiing Profeeor in uhe Depriaient of Hlectrieal Bnginoering ft Texegera University. Member, Tau Beca Pi, Sigma Xi Senior Mem: Der, THEE. Irwin W. Sandberg, BEE, 1965, MEE, 1996, ond DEB. 1888, Polylechnie Trstitate nf Brooklyn; Bell Tahorataries, 1958. Me Sandherg has been concerned with analysis of Tadar systems for nilitary defense, synthesis and analysis of active and time-varying ‘eeworks, several fundamental studies of properties of nonlinear sy tems, and with some problems in communication theory and numerical analysis, His more recent intereeta include macroeconomics, compa ments! models, the theory of digital filtering, and global implicit fonction theorems, Former Vice Chemin IEEE Group on Circuit "Theory, and Former Guest Fditor TEEE. Transactions on Cireut ‘Theory Special Tue on Active and Digital Networks, Fellow and member, IEEE; member, American Assocation forthe Advancement of Science, Bua Kappa Nu, Sigma 36, and Tau Bete Pi Robert C, Strum, BS. fengineering science, 1968, Pennaylvania Stave University; Ming, (electrical engineering) 1067, Cornell Uni- varsiey, MS. ystems engineering), 1978, University of Pennsylvanin, 440. THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1081 Boll Laboratories, 1956—, Me. Strum has worked in the areas uf Impedance calibration and competersontelled measurements of ‘impedance, He has lao been involved wth manual end compular controled ménsurements in fiber optirs His current activiry concerns ompater-based contol aystems for digital wtellce networks. Member, TERK, Tau Beta P. Towell D, White, AB. (physics) 188, M.A. (phyeics), 1861, PRD. (physics), 1858, Princeton University; Princeton University, 1983-1855, Bell Laboratories, 1066—, Mr, Whive's early work included esearch in traveling wave cubes and ammonia maser, fllowed by development fof millimeter wave teanamisson mesauring ae. Since 196F, Ie has ‘een invalved primary inthe development of impedance slandars nnd measuring equipent for use in seveloping and chavecterizing fompanenis, particularly ferromagnetic inductor, for transmission Sotems, rently, Mr. While syperciges a group concerned with test follies for e lightwave undersea eable system. Member, Amevican Physical Society, IEEE. ‘CONTRIBUTORS TO THIS SUF 447