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Jon T. Hougen
No full textJON HOUGEN
NBS/NIST: 1967 - 2001
B: October 23, 1936, Sheboygan, Wisconsin
EDUCATION:
Oberlin College (Ohio), Ford Foundation Early Entrant, 1952-1954
University of Wisconsin, BSc (Chemistry), 1956
Harvard University, MA, 1958; PhD (Physical Chemistry), 1960
PRINCIPAL FIELDS:
Quantum mechanical and group theoretical calculations of quantities of molecular spectroscopic interest for various cases of interaction between rotational, vibrational and electronic motion, with particular emphasis on rotational energy levels and rotational line intensities
POSITIONS HELD AT NBS/NIST:
Research Scientist, Molecular Spectroscopy Section
Chief, Molecular Spectroscopy Section
Research Scientist
NBS/NIST Senior Research Fellow
Acting Chief, Molecular Physics Division
Scientist Emeritus
HONORS:
U.S. Department of Commerce: Silver Medal, 1974; Gold Medal, 1980
Coblentz Award, 1968
Earle Plyler Prize (American Physical Society), 1984
Lippincott Award (Optical Society of America), 1984
MEMBERSHIPS:
American Physical Society (Fellow)
Optical Society of America
Coblentz Society
American Chemical Society
PUBLICATIONS:
Over 100 publications including:
The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules. NBS Monograph 115 (1970)
“The Electronic Emission Spectrum of Triatomic Hydrogen. VI. Visible Bands near 5800 A and Infrared Bands near 3950 cm-1,” (with J.K.G. Watson) Can. J. Phys. 60 (1982) 1261-1284
“The Third and Fourth Torsional States of Acetaldhyde,” (with I. Kleiner, J.U. Grabow, S.P. Belov, M. Yu. Tretyakov, and J. Cosleou) J. Mol. Spectrosc. 179 (1996) 41-6
Names Mentioned in Oral history interview of George Porter, March 3,
No full textGeorge Porter, former head of the Personnel Division of NBS, discusses his nearly 24 years working at the Bureau. Porter came to NBS in 1950 and was Chief of the Personnel Division from 1951-1974. Porter discusses the attitudes of scientists at the Bureau towards the civil service system in the 1950s and 1960s, management and staff relations, and notable events including the AD-X2 controversy. Also mentioned are the NBS Graduate School Program, the relocation of the Bureau from Washington, D.C. to Gaithersburg, and the role of women in the Bureau
List of Names Mentioned in Oral history interview of Ruth M. Davis, May 6, 2003/ with Lisa Greenhouse.
No full text
(Audio Part 1 of 2) Oral history interview of John Hoffman, June 9, 2003
No full textDr. John Hoffman discusses his long career at NIST. His career spanned the years 1954 to 1982, during which time he was in various leadership positions, including Director of the Institute for Materials Research and Director of the National Measurement laboratory
(Audio Part 3 of 3) Oral history interview of John Hoffman, July 21, 2003
No full textDr. John Hoffman discusses his long career at NIST. His career spanned the years 1954 to 1982, during which time he was in various leadership positions, including Director of the Institute for Materials Research and Director of the National Measurement laboratory
(Audio Part 1 of 2) Oral history interview of Bourdon F. Scribner, February 24, 2003 / by Lisa Greenhouse, Bill Martin, and David Lide
No full textBourdon Scribner, former Chief of the Spectrochemistry division, discusses his career at NBS, including working with Dr. William Meggers, his testimony before Congress on the AD-X2 battery additive, and his visits to the Bureau when his father, Bourdon W. Scribner, worked at NB
Oral history interview of Bourdon F. Scribner, February 24, 2003 / by Lisa Greenhouse, Bill Martin, and David Lide
No full textBourdon Scribner, former Chief of the Spectrochemistry division, discusses his career at NBS, including working with Dr. William Meggers, his testimony before Congress on the AD-X2 battery additive, and his visits to the Bureau when his father, Bourdon W. Scribner, worked at NBS
On the stability of exponential backoff
No full textRandom access schemes for packet networks featuring distributed control require algorithms and protocols for resolving packet collisions that occur as the uncoordinated terminals contend for the channel. A widely used collision resolution protocol is the exponential backoff (EB). New analytical results for the stability of the ( binary) EB are given. Previous studies on the stability of the ( binary) EB have produced contradictory results instead of a consensus: some proved instability, others showed stability under certain conditions. In these studies, simplified and/or modified models of the backoff algorithm were used. In this paper, care is taken to use a model that reflects the actual behavior of backoff algorithms. We show that EB is stable under a throughput definition of stability; the throughput of the network converges to a non-zero constant as the offered load N goes to infinity. We also obtain the analytical expressions for the saturation throughput for a given number of nodes, N. The analysis considers the general case of EB with backoff factor r, where BEB is the special case with r = 2. We show that r = 1/( 1 - e(-1)) is the optimum backoff factor that maximizes the throughput. The accuracy of the analysis is checked against simulation results
Potassium bromate assay by redox titrimetry using arsenic trioxide
No full textBromate, a disinfectant, is one of the analytes of interest in wastewater analysis. Environmental laboratories have a regulatory need for their measurements to be traceable to NIST standards. Bromate is not currently certified as a NIST Standard Reference Material (SRM). Therefore, a traceable assay of potassium bromate (KBrO3) is needed. KBrO3 was dissolved in water and assayed by redox titrimetry using arsenic trioxide (As2O3). A nominal ( 0.1 g) sample of As2O3 was dissolved in 10 mL of 5 mol/L sodium hydroxide. The solution was acidified with hydrochloric acid and about 95% of the KBrO3 titrant was added gravimetrically. The end point was determined by addition of dilute ( 1: 3) titrant using an automated titrator. The KBrO3 assay was determined to be 99.76% +/- 0.20%. The expanded uncertainty considered the titrations of three independently prepared KBrO3 solutions