II
BBN Systems and Technologies Corporation
NEWSLETTER
Vol. 5, No. 6
June/July 1988
GOGOS RETIRES AFTER 35 YEARS WITH
BBN
Dick Gogos, a division scientist who is retiring this
June, has been with BBN since 1953, when it was
located in a six-flat frame apartment building at 16
Eliot St. in Harvard Square. Dick's specialty is
underwater acousticsmparticularly the study of
long- and short-range acoustic propagation in the
ocean, sonar research, and the measurement of
underwater acoustic signals--but he explains that
when he joined BBN the_ company was involved in
air acoustics only.
Dick came to BBN while he was a student in the
Northeastern University co-op program-- "I must
have been one of the fn'st co-op students to work
here," he says. He studied electrical engineering in
college, and although he took some acoustics
courses, he says he might have done something else
had he not come to BBN. His interest in acoustics
came from the fact that he worked here. Dick
worked originally with Jordan Baruch, one of BBN's
founders, who later went on to become Assistant
Secretary for Science and Technology for the U.S.
Department of Commerce.
Early Projects
His furst project, with Francis Wiener (a BBN acous-
tics research scientist), was an experimental study of
acoustic propagation over various types of earth
surfaces, such as over flat low vegetation, through
wooded areas, across mountain valleys, over ocean
waters in fog, and in city and suburban environ-
ments. Detailed meteorological observations were
used in a novel way to explain the results of the
acoustical measurements. The U.S. Army used the
results of these measurements in the field for troop
communication, the civil defense program used them
in designing warning systems for city and suburban
populations, and the U.S. Coast Guard used them in
the design of fog horns.
Dick Gogos
BBN's first underwater acoustics experimental
program came through the study of acoustic reflec-
tivity of various types of ocean bottoms using
explosives as sound sources. This information was
needed during the early design of "bottom-bounce
sonars" that are in use today on modem naval ves-
sels. BBN did pioneering work on developing these
measurement techniques and went on to do more
work in ocean-bottom research for the Navy.
Bottom loss studies have been an important BBN
activity, and Dick and his fellow researchers in this
area have traveled all over the world, often spending
a month or more at sea. "We went where the oceans
were," he says, pointing to a large map of the world
that hangs on the wall of his office. "We've worked
in the Atlantic, the Pacific, the Barents Sea, and the
South China Sea."
An early program Dick worked on was the Moored
Surveillance System, in which BBN was a subcon-
tractor to General Electric Co. Originally the testing
for this program took place in the ocean waters off
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Vol. 5, No. 6 June/July 1988
eastern Canada, where the hostile winter climate
made testing erratic and unsuccessful. Dick sug-
gested finding a more benign site that would allow
year-round testing. "After investigating various sites
in Bermuda and the Bahamas we settled on St. Croix
in the U.S. Virgin Islands. Since it was a U.S.
territory and there were Navy facilities on the is-
land."
community and be competitive. ,There was lots of
work around, and we found a niche we were inter-
ested in and got strong enough to be an asset to the
Navy labs." This was one of the ways that BBN got
started on activities that it continues to pursue today.
The expansion from air acoustics to underwater
acoustics was part of the normal course of evolution
into new fields that we have continued to follow.
At the naval facility in St. Croix, BBN researchers
have done extensive testing on both the mechanical
and acoustic operations of air guns. An air gun,
which is not a gun at all but a high-level impulsive
sound source that looks like a large cylinder, is a
component of a surveillance system that can be used
in the long-range detection of submarines. The use
of air guns was a novel development in underwater
acoustics because it used impulsive signals instead
of the conventional sonar signals. Jim Barger, one
of BBN's chief scientists, was a major proponent of
the use of air guns in underwater acoustics and an
important figure in their development for use as a
sound source.
Growth in Underwater Acoustics
Our first major underwater acoustics program, and
perhaps our most challenging at the time, according
to Dick, involved work on measurement of radiated
noise of the MK 48 torpedo during its early'develop-
ment. This program came along early in BBN's
experience in the field of underwater acoustics, and
at the time they took it on it represented quite a
stretch for them. "We were in a learning process,"
Dick comments. The project required knowledge in
many areas of acoustics; they had to learn about
environmental effects, the effects on acoustic signals
propagating through the Ocean, how to deal with the
variations caused by this environment, and systems
that would allow measurement of the radiated noise
of these high-speed vehicles.
Because it touched on so many different aspects of
underwater acoustics and ocean engineering, the
program was an important one that gave BBN an
opportunity to expand its knowledge. "The technol-
ogy used for the project was developed during
World War II, and to this day it is still being used,"
Dick says; "we've just refined it." Underwater
acoustics was a new activity for BBN at the time,
and we were one of the few companies engaged in it.
The organizations working in this field were chiefly
Navy laboratories. "We had to learn fast and be
sufficiently inventive to find work within the Navy
A Mature Technology
"As we grew in the field of underwater acoustics, we
gained a broad range of experience that allowed us
to work in the all-encompassing area of system
analysis," Dick notes. An example of this broad-
based activity was the development of high-speed
craft such as military hydrofoils, a project we
worked on around 1980. This program was an
amalgam of hydrofoil acoustics, advanced sonobuoy
technology, submarine acoustics, advanced towed
array technology, and high-performance torpedo
acoustics. THe combination of these technologies
resulted in the development of ASW tactical use of
hydrofoils. Dick presented a paper at the Offboard
Sensor Symposium (a Navy-sponsored symposium),
describing the results of this multidisciplinary
theoretical/experimental program. "Our ability to
work in this broad area," he says, "represents a
measure of our growth in the field."
Perspective on BBN
In thinking about why he has stayed at BBN so long,
Dick says, "It is a great place to work. We have the
freedom to develop our own interests and to grow
professionally. For me it has been an opportunity to
work with some of the best scientists and engineers
in our field. Research allows us to work in unknown
territory where the outcome is often different from
what we expected."
"Our work at BBN is most satisfying when we can
develop an idea, market it, and conduct the research
on it. Allowing researchers to see a project through
from beginning to end is one of the strengths of
BBN." Noting the changes he has seen over the
years, Dick comments, "I look back to our early
days in underwater acoustics and I marvel at the
growth and maturity I see now."
When he leaves BBN, Dick plans to take the sum-
mer off, settle into his new house on the coast of
Maine, and do some sailing. He will be coming
back to BBN occasionally to work as a consultant.
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Vol. 5, No. 6 June/July 1988
WALDEN DISCUSSES REORGANIZATION
In the following article Dave Walden, President of
BBN Systems and Technologies Corporation, re-
sportds to questions that have arisen about the
reorganization and other matters.
You haven't written for the Newsletter before.
Why have you agreed to an article now?
Since I'm the one who started the Newsletter, it
seemed inappropriate to have an article that gave
what might appear to be a self-serving description of
my views on our company or of me. Also, I have
not wanted to include articles in which I gave a pep-
talk or lectured the staff, and I didn't want to include
procedural instructions (such as how to fill out travel
reports, or admonitions to return library books),
because I'd like the Newsletter to be primarily a
means for the staff members to learn about each
other's activities, rather than for dictating proce-
dures. However, people frequently ask me questions
when they run into me, so I'll try to answer publicly
some of the questions that I'm asked in person.
Why doesn't the Newsletter contain more hard
news and technical information?
I initiated the Newsletter five years ago, because we
had four or five separate divisions at half a dozen
locations. I thought a newsletter might help people
know a little more about each other and thus feel
more like part of the same team. However, a news-
letter that has 1000 copies distributed each month
must be treated as a public document, and therefore
we can't discuss many of our technical projects
because it would be inappropriate for us to publicize
information about our clients.
Therefore, we print uncontroversial articles such as
brief biographies of new staff members, general
descriptions of areas of staff technical activity, staff
sports results, informational announcements, and
occasional longer profiles of staff members. I wish
more of the staff reported on their activities because
that would make the Newsletter more interesting.
Why have we recently reorganized (again!) and
changed our company name? This change has
not been explained very much.
I gave the essential reasons for the reorganization in
my announcement memo. We decided to combine
DGI and Labs for several reasons: (a) to enable DGI
and Labs to use all of each other's resoumes (such as
marketing, branch offices), (b) to improve the
financial posture of the two organizations as they
increasingly work together, and to substantially
simplify the coordination of the DGI and Labs
activities on our simulation and training contracts
(for example, so that we can use interdivisional job
numbers instead of intersubsidiary requisitions), and
(c) to clarify for DGI staff that I have as much re-
sponsibility and concern for DGI as for Labs. Al-
though DGI has reported to me since it was acquired
by BBN, I've been president of Labs and not DGI,
and this inconsistency led some DGI people to worry
on occasion about my giving priority to Labs rather
than DGI.
We also concluded that if we are to successfully
pursue major contracts like the follow-on to SIM-
NET and the next-generation underwater acoustics
system, we must focus on these activities. Specific
divisions, with their own marketing, seemed the best
way to achieve this focus--especially in the under-
water acoustics area, where the activities have for a
long time been split across the Physical Sciences and
Computer and Information Sciences divisions; .hence
our two new systems divisions, the Sensor and
Surveillance Systems Division and the Simulation
and Training Systems Division.
The decision to combine our physical sciences'
laboratories and our computer and information
sciences laboratories activities into one division
came from my desire to have these groups continue
to increase their interactions and cooperation, espe-
cially as we try to increase in the next few years the
proportion of R&D we do in the physical sciences
relative to the consulting and experimentation we do
in that area.
My feeling about change is that we should reorgan-
ize often enough to adjust to changing circumstances
and to provide people with new activities and col-
leagues. The overall goal of change should always
be to improve our business capability and the oppor-
tunities for our staff.
When considering reorganizations, we like to go
slowly. Typically the division managements and I
(and to some extent department management) dis-
cuss changes for months before implementing them.
During this time we try to find the plan with the
most benefits and least new problems (althohgh
every plan has some challenges, especially in plac-
ing personnel). During this time we get a sense from
department managers of the general staff reaction to
the proposed change.
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Vol. 5, No. 6 June/July 1988
And the name change?
Some of our Sensors and Surveillance Systems and
Simulation and Training Systems clients and poten-
tial clients were using the name "BBN Laboratories"
as a reason why we might not be a qualified contrac-
tor ("We are looking for a systems company, not a
'laboratory'"). Therefore, we decided to change the
name to BBN Systems and Technologies Corpora-
tion (BBN STC). This change is also consistent with
my own inclination to allow our charter to expand to
include consulting, research, development, systems,
and possibly products (such as Diamond). Our
Scotland group also felt that they would have an
easier time selling our services in Europe if we were
a systems and technologies company instead of
laboratories.
Why are we stressing division names rather than
numbers?
Division numbers have a long history at BBN, and a
particular division number may incorrectly be
viewed as representing a technology, style, or cul-
ture. In order to emphasize the business reasons for
the Organizational change and to minimize negative
or incorrect notions about divisions I have chosen to
emphasize the divisions' names, which reflect their
business thrust. The Accounting Deparunent will
still assign department numbers to track department
expenses and aggregate them across the division
(and the first digit of each department number will
be the same for all departments in a division, but we
will stress use of the names).
Are we ever going to have another companywide
staff meeting?
I try to visit each non-Cambridge office a couple of
times a year, and I usually speak to the staff when I
make these visits. In Cambridge, we haven't had
staff meetings lately because of the daunting logis-
tics (how to schedule hundreds of people into a 175-
seat auditorium), and because I feel less comfortable
standing in front of 175 people "lecturing" them than
sitting and chatting with a few dozen people. Per-
haps divisions or departments should invite me to
meet with them.
Some of us have known you for a long time, but
others, who are relatively new to BBN, don't
know much about you. What is your back-
ground, and what have you done at BBN?
I was born in Washington state and raised on the
edge of the Central Valley in California (about 40
miles east of San Francisco). I graduated with a
major in math from San Francisco State College in
1964. My f'zrst full-time job was at MIT's Lincoln
Laboratory and my second was at BBN; in these two
jobs I learned to program computers and build
computer systems with lots of instruction from Will
Crowther and Frank Heart. During my last years at
Lincoln Laboratory and fin:st years at BBN, I at-
tended MIT part-time, completing the course work
but not the thesis for an M.S. in computer science.
I'm proud to note that I was the fin:st programmer on
BBN's PROPHET system (quickly replaced by Fred
Webb) and, with Will Crowther and Bernie Cosell,
programmed the original ARPANET packet switch.
Because I wanted to live in Europe, in 1970 1 moved
to Oslo, Norway, for a year, but I returned to BBN in
1971 and worked on the projects for the ARPANET
TIP (which preceded the TAC) and the first version
of the SATNET switch, and I was involved in little
ways with the Pluribus parallel processor. For a few
years I led our communications R&D activities as
Assistant Division Director of the old Computer
Systems Division. In 1978 I was made president of
a BBN subsidiary to build and sell electronic mail
systems, but this was not a success, and in 1980 I
moved to BBNCC, where I was Executive Vice
President with a variety of management responsibili-
ties (including Technical Director for a time).
In 1982, I became Director of BBN's Professional
Services Group (the predecessor to BBN Labs) with
responsibility for BBN consulting, research, and
development activities (and instructions to encour-
age interdivisional interaction) and then, in 1983,
President of BBN Labs. Since 1987, I have been
responsible for BBN DGI as well as BBN Labs, now
combined under BBN Systems and Technologies
Corporation.
4
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Vol. 5, No. 6 lune/luly 1988
qATO PROJECT NEARS COMPLETION
After six years, BBN's involvement in the develop-
ment of an advanced research ship for NATO is
coming to an end. On May 6, 1988, the research
vessel Alliance was delivered at La Spezia, Italy, to
the SACLANT Undersea Research Center, the
principal underwater research organization of
NATO. Alliance is one of the most advanced re-
search vessels ever built and one of the quietest,
thanks to BBN's involvement as acoustic consultant.
The 93-meter-long ship displaces about 3,000 tons,
is capable of 16 knots, and has a range of up to 8,000
nautical miles. Alliance can accommodate up to 20
scientists and their equipment, and has a crew of 27.
The ship will sail as a public service vessel under the
flag of the Federal Republic of Germany with an
international crew of officers and seamen from
NATO nations.
BBN's involvement in the project began in 1982,
when the Naval Ship Research and Development
Center (NSRDC) was tasked with advising the then-
SACLANT Anti-Submarine Warfare Research
Centre on the design and construction of a new
reseamh vessel to replace the Maria Paolina G., a
former cargo vessel adapted for marine research
work and chartered to the Centre since 1964.
NSRDC approached BBN Laboratories in order to
draw on BBN's expertise in ship acoustics and on
the experience of Arial George, a BBNer who had
been involved in the design of the Canadian research
ship, Quest. Mr. George has been project supervisor
and has been living almost full-time in Italy in order
to devote complete attention to the project.
BBN's initial role was to assist SACLANT Centre
with the concept design of the ship. This work
involved developing acoustic performance require-
ments for the new ship, performing a feasibility
assessment of those requirements, translating them
into hardware requirements, and developing the
preliminary ship design and specification for interna-
tional bid. BBN also assisted a panel of interna-
tional experts composed of representatives from
NATO member nations in evaluating bids submitted
by shipbuilders. The shipbuilder Cantieri Navali
Italiani (CNI) was selected to build the vessel in its
shipyard at Muggiano, Italy.
During the detail design and construction process, a
number of BBN staff joined Mr. George at Mug-
giano to develop analytical noise models, witness
Alliance
vendor noise and vibration tests of machinery and
equipment, review designs and drawings, inspect
construction, and review specifications for machin-
ery being incorporated into the ship.
Construction began in 1984 and was completed late
last summer. At that time, several underwater
radiated noise trials were held in the Mediterranean,
but Alliance was so quiet and the Mediterranean so
relatively noisy that it was virtually impossible to
take the measurements. New trials took place from
June 9 through 16 at Exuma Sound in the Bahamas.
This site was selected because of the lower ambient
noise present in the area. BBN is coordinating
operations for these trials and will evaluate the noise
data to determine compliance with ship specifica-
tions.
Designed and built for a range of experiments in
deep and shallow water in acoustics and
oceanography, Alliance will be available for use by
NATO member nations doing research in those
fields. Representative experiments include deter-
mining how sound waves behave in the sea, the
effects of the ocean's characteristics and its bounda-
ries on underwater sound, and the influence of
ambient noise generated by man and nature. Alli-
ance will provide an important platform for at-sea
experiments and will greatly enhance SACLANT's
research capability.
5
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, Vol. 5, No. 6 June/July 1988
'SIMNET DEMONSTRATION
Pictured from left to right are Duncan Miller, BBN's
SIMNET Program Manager, Col. Jack Thorpe,
DARPA Program Manager for SIMNET, and Ray-
mond Colladay, Director of DARPA.
The f'zrst public demonstration of the SIMNET
Long-Haul Network (LHN) was held at the 1988
U.S. Army Armor Conference at Fort Knox, Ken-
tucky on May 10, 1988. At the demonstration, LHN
linked SIMNET simulators in Cambridge with
simulators at Fort Knox for long distance real-time
training exercises. Dr. Raymond Colladay, director
of DARPA, who participated in the SIMNET dem-
onstration, commented that LHN "is a new concept
of dial-up or 'conference call training' for widely
dispersed forces."
SIMNET is designed to interconnect large numbers
of manned, microcomputer-based combat vehicle
simulators on a network for joint fighting operations.
The SIMNET LHN uses satellite, microwave, or
land links to connect multiple local area networks of
simulators. Communications links on the network
range from 56 kilobit-per-second dial-up data links
to high-bandwidth dedicated satellite channels. Data
compression techniques maximize the efficiency of
communication channel usage and permit additional
simulators to participate in global joint exercises. In
the next year, it is expected that all SIMNET sites in
the U.S. and Europe will be connected by high- and
low-bandwidth data links supporting joint task
fomes and NATO operations.
RECEPTION HELD FOR DIVISION
SCIENTISTS
On June 1, the Science Development Program
sponsored a reception at the Conference Center at 10
Fawcett St. for those staff members who were
appointed division scientists in fiscal years 1986 and
1987. The recently created position of division
scientist is one of the three highest positions on
BBN's technical career ladder. BBN Laboratories'
promotional policy provides this career ladder,
which is based on technical rather than managerial
responsibility, in recognition of the importance of
technical excellence at BBN. Those who choose to
follow the technical career ladder are usually strong
individual contributors or leaders of small groups
working on specific projects. Until 1986, BBN had
nine division scientists. At this reception the four-
teen division scientists appointed since then were
honored.
The following staff members were appointed to the
position of division scientist in fiscal year 1986:
Henno Allik, technical leader of our finite
elements activities, received an undergraduate
degree from City University of New York and a
Ph.D from New York University. He has been
at BBN since 1982.
Robert (Rusty) Bobrow, a key technical con-
tributor to our natural language R&D efforts,
did his undergraduate and graduate work at
MIT. He has been at BBN full-time since 1974
and was a part-time employee here before that.
Howard (Howie) Briscoe, a major architect of a
number of digital signal processing systems, has
been at BBN since 1969. Howie did his under-
graduate and graduate work at MIT.
Arial (Rial) George, a key consultant in ship
quieting, was educated at Tufts University and
has been at BBN since 1970.
Creighton (Dick) Gogos, a key contributor to
much of our ASW experimental work in under-
water acoustics, studied at Northeastern. He has
been at BBN since 1953.
Stephen (Steve) Milligan, a system architect and
software development leader who is much in
demand, has been at BBN since 1978. He
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Vol. 5, No. 6 June/July 1988
received his undergraduate degree from MIT
and a Ph.D from the University of Rhode
Island.
Bruce Roberts, known for his innovative work
in applied AI, has been at BBN since 1979. He
did his undergraduate and graduate work at the
University of Michigan.
The following staff members were appointed divi-
sion scientists in fiscal year 1987:
John Frederiksen, a well-known researcher in
cognition in our Educational Technology
Department, studied at Harvard as an under-
graduate and received a Ph.D. from Princeton.
Colin Gordon, a key consultant in building
vibration control, was educated in Glasgow,
Scotland. He was at BBN from 1963 to 1966
and again since 1975.
John (Jack) Heine, a key technical leader in
acoustics, particularly acoustic signal process-
ing, has been at BBN since 1966. Jack did both
his undergraduate ahd doctoral work at MIT.
.William (Bill) Levison, distinguished researcher
in the field of human performance, especially
manual control. He has been at BBN since
1964, and he did his undergraduate and doctoral
work at MIT.
Nathan (Nate) Martin, who has been a key
technical leader in sonar acoustics, received an
undergraduate degree and Sc.D from MIT. He
has been at BBN since 1976.
Bruce Murray, known for his innovative me-
chanical design, has been at BBN since 1974.
Bruce was educated at Derby Technical College
in the U.K.
Candace (Candy) Sidner is a key researcher in
knowledge representation for natural language,
particularly for planning and discourse. Candy,
who has been at BBN since 1979, received an
undergraduate degree at Kalamazoo, a master's
degree at the University of Pittsburgh, and a
doctorate from MIT.
In acknowledging the achievements of the newly
appointed division scientists, Dave Walden com-
mented that among them these fourteen people had
produced 225 publications and too many oral presen-
tations and sponsored technical reports to count.
7
Pointing out that the scientific and technical staff are
the basis of BBN's success, he thanked the new
division scientists for their past contributions and
looked forward to their future contributions.
BBN PERFORMS TESTS OF JAPANESE SHIP
KA/YO
The BBN/Mitsui test team on the deck of the KAIYO.
Front row, left to right: Kosuke Okuni, Dwight
Davis, Jeff Doughty, John Scandurra, Mr. Mour-
anaka. Back row, left to right: Carl Cascio, George
Abe, Joe Chadbourne, Mark Clifton, S. Seki, Dan
Nelson, Doug Hanna, and Mark Sutterlin. Not
pictured, Gregg Schudel, George Reagan, Rich
Smart, and Tim Boyd.
In May, BBN Laboratories engineers performed
dockside acoustic tests on board the Japanese ship
Kaiyo in Chiba, Japan (near Tokyo). The Kaiyo, a
Small Waterplane Area Twin Hull (SWATH) ship
used for deep diving and oceanographic research, is
owned and operated by the Japan Marine Science
and Technology Center (JAMSTEC), a nationally
funded research organization. Ships of the SWATH
type have a unique hull design which offers im-
proved stability over a conventional hull design in
heavy seas. Woods Hole Oceanographic Institute
sponsored the tests, to obtain full-scale test data
which will be used to evaluate the acoustic perform-
ance of this type of hull configuration.
The BBN test team for this Washington-based
project included engineers from the Washington,
New London, and Cambridge offices. Assisting
them were several engineers from the Kaiyo's
builder, Mitsui Engineering and Shipbuilding Com-
pany. The tests were conducted at Mitsui's shipyard
during the final days of the Kaiyo's first overhaul.
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Vol. 5, No. 6 June/July 1988
STAFF NEWS
Employment Anniversaries
The following employees have completed 5 to 35
years at BBN this June and July.
5 years
Debra Boseck
Michael Cote
Kathleen Huber
John Morrison
Arthur Pope
Christine Tamoosh
Beth Warren
10 years
Michael Coughlin
Marguerite Diblasio
Robert Gorman
Thomas Graham
Harold Perry
Matthew Sneddon
Benjamin Woznick
15 years
Robert Bobrow
William Biker
20 years
Thomas Horrall
Carol Prybylo
25 years
Duncan Miller
Rein Pim
35 years
Bill Watters
New Staff
Dan Cerys has joined the Laboratories Division of
BBN STC to work in artificial intelligence. Before
coming to BBN, Dan worked at Texas Instruments,
designing software for their Explorer Lisp machine.
He has also been Texas Instruments' visiting scien-
tist at M1T for the past year and a half. Dan has B.S.
and M.S. degrees in biological sciences from Stan-
ford. His outside interests include amateur radio,
bicycling, nordic skiing, and eating out.
Sam Marshall has joined the Washington Office to
work in the area of sensors and surveillance. Sam
comes to BBN from the Navy, where he was Direc-
tor of the Navy Science Assistance Program
(NSAP). Before that, he was NSAP Science Advi-
sor to Commander Surface Force, U.S. Atlantic
Fleet. For the preceding thirteen years, he did
research in underwater acoustics and its applications
to sonar at the Naval Research Laboratory and at the
Naval Ocean Research and Development Agency
8
(NORDA). He was also associate editor of the U.S.
Navy Journal of Underwater Acoustics. Sam has
taught physics and has flown radar interceptors in
the U.S. Air Force. He has a B.S. in physics from
Virginia Military Institute and an M.S. and a Ph.D.
in physics from Tulane University.
Gilbert Syswerda recently joined the Laboratories
Division of BBN STC to work in artificial intelli-
gence. He will be working on the Intelligent Labo-
ratory Management System for the U.S. Navy. Gil
holds an M.S. in computer science from the Univer-
sity of Michigan, where he studied under John
Holland in the fields of genetic algorithms and
classifier systems. His outside interests include
sailing, backpacking, gardening, and a recently
acquired interest in remodeling an old house.
Flynn Wins Fencing Championship
John Flynn, of the Washington Office, won the
National Senior Championship title for the epee in
the 45- to 50-year age group at the National Fencing
Championships held in Chicago, June 18 through 26.
The senior competition is traditionally divided into
five-year age groups, starting with age 40 and going
as high as necessary to accommodate those who
wish to compete. This year there were six catego-
ries, covering age groups from 40 to 70. Separate
competitions were held for the three fencing weap-
ons: epee, foil, and sabre. John also won the overall
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Vol. 5, No. 6 June/July 1988
enior title in a competition among all the individual
age group winners.
John began fencing at Texas A&M University in
1957 and continued the sport while he was a mid-
shipman at the Naval Academy. He currently fences
at the District of Columbia Fencing Club in Wash-
ington, D.C.
RidIon Elected Vice President at BBN SPC
BBN Software Products Corporation (BBN SPC)
announced that Linda RidIon has been elected
divisional vice president of customer services. In
this capacity, she is responsible for managing techni-
cal documentation development, support services,
and production and distribution. Linda, who joined
BBN in 1981 as support manager for BBN Informa-
tion Management Corp., was formerly director of
customer services at BBN SPC. Linda has also
worked at BBN Communications Corporation,
where she was director of education services. Be-
fore joining BBN, Linda held a variety of marketing
and management positions as an independent con-
suitant and with several .high-technology companies,
including Digital Equipment Corporation and Dy-
namics Research Corporation.
New Appointments at BBN ACI
In July, BBN Advanced Computers Inc. announced
the appointment of David Micciche to the position of
vice president of marketing. Most recently, Dave
was vice president of sales, marketing and service at
Aliiant Computer Systems, headquartered in Little-
ton, Mass. Previously, he spent 16 years at Digital
Equipment Corporation in sales, marketing and
general management positions in both the U.S. and
Europe. In his new role, Dave will focus on helping
ACI to become a leading provider of commemial
systems to the industry for real-time simulation and
other time-critical applications.
As part of BBN Advanced Computers' increased
focus as an international computer product company,
Gary Schmidt has been appointed to the new posi-
tion of vice president of European market develop-
ment. Gary will work closely with BBN STC's
Scotland Office to develop marketing activities for
.parallel processing. Gary joined BBN Laboratories
n 1984 to work on the Butterfly TM parallel processor
and transferred to BBN ACI when it was established
in 1986. Gary came to BBN from Artifici,al Intelli-
gence Corporation in Waltham, Massachusetts.
Dedication of Computer Facility
On Thursday, June 23, the BBN Washington Com-
puter Facility was dedicated in memory of James
Louie, Ph.D., at a ceremony and reception attended
by Jim's widow, Emma, and their daughter, Nicole.
At the event, Jude Nitache, Director of the Washing-
ton Office, officially dedicated the computer facility,
and unveiled a bronze plaque to be placed at the
door of the demonstration room on the twelfth floor.
He then presented Emma with a scholarship fo,r
Nicole, a high school senior, and for the Louie s son,
Daniel, a student at George Mason University. The
scholarship consisted of contributions made by Jim's
colleagues in Washington and in several other BBN
offices.
The plaque dedicating the facility to him reads, in
part: "... In 1980, Jim Louie brought the BBN
Washington Office into the computer age. He
worked tirelessly to specify and install our f'zrst
networked computation system. Jim was a man of
uncommon integrity and dignity. His generous
spirit, fine mind, and keen sense of humor endeared
him to all of his colleagues .... "
Recent Presentations and Publications
John Sweta published an article title d "Measuring
the Accuracy of Diagnostic Systems" in the June 3,
1988 issue of Science, No. 4857, pp. 1285-1293.
Intelligent Tutoring Systems; Lessons Learned,
Psotka, Joseph et al eds. (including Dan Massey) NJ:
Lawrence Earlbaum, 1988, contains the following
articles by BBNers:
"The Development of Troubleshooting Expertise in
Radar Mechanics" by Yvette J. Tenney and Laura C.
Kurland
"Issues in Developing an Intelligent Tutor for a
Real-World Domain: Training in Radar Mechanics"
by Laura C. Kurland and Yvette J. Tenney
"Teaching Real-Time Tactical Thinking" by Frank
Ritter and Wallace Feurzeig
"Intelligent Tutoring Systems for Electronic Trou-
bleshooting" by John Frdefiksen, Barbara White,
and Allan Collins
"A Training System for System Maintenance" by
L. Dan Massey, Jos deBruin, and Bruce Roberts
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Vol. 5, No. 6
!
"Understanding Reflective Problem Solving" by
Wallace Feurzeig and Frank Ritter.
Bill Levison presented a demonstration of the com-
puterized implementation of a human operator
model at the NATO Workshop on Applications of
Human Performance Models to Systems Design,
held in Orlando, Florida, on May 9-13. He also
submitted a companion paper titled "The Optimal
Control Model for Manually Controlled Systems," to
be published in the conference proceedings.
John Zavgren presented a paper titled "The Perform-
ance Improvement from Receiver-Directed Trans-
missions in Packet-Radio Networks" at TCC '88 in
Fort Wayne, Indiana, May 4, 1988. John also has an
article forthcomingin the August 1988 issue of the
SIAM Journal on Optimization and Control. The
article is titled "Feedback Stabilization of Linear
Dynamic Systems with Multirate Sampled Output."
The second edition of Structure-Borne Sound by
L. Cremer and M. Heckl, translated from German by
Eric Ungar, was recently published by Springer-
Verlag.
Chip Bruce was a contributing author for a series of
books published by D.C. Heath entitled Heath
Readers. The books consitute a basal reading
program for grades K to 8.
RUNNING NEWS
Manufacturer's Hanover
The Manufacturer's Hanover Corporate Challenge
3.5 Mile Race will start at Boston Common on
Thursday, July 28 at 7:00 P.M. Last year's race
drew 7000 runners from over 300 companies. If you
are interested in signing up for the race, contact Liz
DesCognets at ext. 2575 or Scott Thomson at ext.
1478. The AMBLERS will subsidize half of the $8
entry fee if you register by Thursday, July 21.
Hardesty Wins Women's Competition
On Saturday, June 18, 14 BBNers participated in the
NECTA 5K Corporate Race at the Dedham campus
of Northeastern University. Gwyn Hardesty won the
women's competition with a time of 17:50, more
than 40 seconds faster than the second-place fin-
isher. Vanessa Rudin and Katy Yoon also per-
formed well -- both finished in the top of the Divi-
sion 2 race.
June/July 1988
Gwyn Hardesty nearing the finish line in the NECTA
5K Corporate Race.
In the men's race Charlie Eaves-Walton, of BBN
STC's Scotland Office, finished with a time of
17:19, placing him f'zrst for BBN and 19th overall.
Ken Hunt, also frøm Scotland, ran a strong 22:26.
Dave Meltzer and Scott Thomson finished 3rd and
2nd for BBN and 33rd and 23rd overall, with times
of 18:22 and 17:43 respectively. Tim Robichaud
had an outstanding f'zrst race, passing nine runners in
the last four hundred meters. His finishing time was
18:51, placing him 45th overall. Peter Mattera,
Mario Morreia, Herb Rush, Brian MacNell, Gary
Joseph, and Rob McDaniel all finished with strong
efforts in the 21-, 22-, and 23-minute range.
BBN BECOMES A UNITED WAY PACESET-
TER COMPANY
Last fall, BBNers contributed $78,663 to the Annual
United Way Campaign. Impressed by our history of
giving, the United Way has asked BBN to join
approximately 50 Pacesetter companies in condUct-
ing their annual employee solicitations before the
general campaign. The generous contributions
received from these companies will permit this
year's fall campaign to kick off with more than $1.2
million collected toward our $48.7 million commu-
nity goal. Such contributions set an example for
everyone.
10
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Vol. 5, No. 6 June/July 1988
When you receive a BBN United Way Pacesetter
Pledgecard in your July 7 payroll envelopes, please
take a minute to consider the challenges our commu-
nities are facing. Despite the strong economy in
Massachusetts, the need for human services is rising,
and federal support to meet the need is declining.
The United Way is a vital resource in the community
for providing food, affordable housing, child and
spouse abuse prevention, home health care for the
elderly, drug and alcohol abuse counseling, family
guidance, AIDS research, child day care, and many
other services.
A few changes in this year's campaign are worth
noting. First, instead of holding our traditional kick-
off event, BBN Inc. will increase its contribution
50% from last year-- the money will be better spent
by United Way! Second, because a significant
proportion of BBNers live in the Merrimack Valley,
the pledgecards now include charities in that United
Way area as well as charities in the Massachusetts
Bay area, where all contributions have been funneled
in the past. Third, a new provision on the
pledgecard allows contributors to specify which
charities they would like to support. Even though
most allocations will be made independently of
requests, we feel that it is important for contributors
to be able to tell the United Way which agencies_.
they think are thb most deserving.
The campaign will run from Thursday, July 7
through Friday, July 29. All pledgecards should be
returned to Janet Pumam (room 11/506) before July
29.
Stuart Exell of BBN Systems and Technologies,
Europe, shown participating in the benefit rowing
contest in Edinburgh, with other BBN team
rhembers looking on (see May 1988 Labs
Newsletter).
BBN STC REPORTS
BBN Report No. 6579, F-14 Modeling Study: Final
Report, W. Levison
BBN Report No. 6605, Madera Road Vehicular
Noise Study, A. Yazdanniyaz
BBN Report No. 6618, Assessment of Low-Fre-
quency Vibrations at Proposed Site for Intel D-2,
H. Amick, C. Gordon, and K. Pearsons
BBN Rpeort No. 6623, A Study of Floor Vibrations
Caused by AGV Operations, H. Amick
BBN Report No. 6740, Traffic Noise Study Madera
Road and Los Angeles Avenue, A. Yazdanniyaz
BBN Report No. 6748 and 6748R, Noise Study for
Proposed Sawtelle Residential Complex in the
Community of Palms, R. Nugent
BBN Report No. 6753, A Study of Metro Rail
Vibration as It Might Affect the Kaiser Permanente
Facilities Adjacent to Sunset Blvd., R. Nugent
BBN Report No. 6792, Draft EIS: Technical Ap-
pendix Noise and Vibrations IH35W/IH#, Fort
Worth, D. Coate
BBN Report No. 6809, Environmental Noise Impact
Assessment Modernization of the Boise Cascade
Rumford Mill, Rumford, Maine, E. Wood, D. Coate,
and S. Munier
11
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Vol. 5, No. 6 June/July 1988
B'BN Report No. 6851, ELASTIC and Reasoning
Under Uncertainty, A. Rubin,. A. Rosebery, and
B. Bruce
BBN Report No. 6861, Multisensor ADM Design
Plan, A. Derr, V. Viswanathan, and D. Whittemore
Camb TiM 997, T-AGS Sonar Dome Area Self-
Noise Improvement Investigation, D. Sachs, et al.
TIR 107, Detecting Black Holes in Packet Radio
Networks, J. Ong and G. Lauer
TIR 108, The Diamond User Interface Toolkit:
Introduction, Diamond Dialogs, Diamond
Programmer's Style Sheet, H. Forsdick, et al.
T1R 109, The Intelligent Gateway Troubleshooter,
M. Leib
NEWSLETTER EDITORIAL POLICY
This newsletter must be careful to avoid printing
items that are of proprietary interest either to a cus-
tomer or to BBN STC, or that would otherwise be
unavailable to competitors, or that might be of
special interest and otherwise unavailable to the
investment community. Thus, for example, we will
not usually print items regarding proposed or ongo-
ing contracts or, in some cases, completed contracts.
If you think you have an item of interest for the
newsletter and don't know whether it falls under the
above rule or not, please submit it, but please under-
stand if we cannot use it.
WANTED: PHOTOGRAPHS FOR BBN STC
NEWSLETTER
Anyone interested in submitting photographs for use
in the BBN STC Newsletter should send them (nega-
tives, black & white or color prints, or slides) to
Cheryl Mammone, room 6/576. Unfortunately, we
will not always be able to return photographs.
NEWS ITEMS SOLICITED
The BBN STC Newsletter is published monthly.
Send news items to Cheryl Mammone via interoffice
mail or via electronic mail to cmammone; the dea0-
line for accepting contributions is th 15th 9: each
month.
NEWSLETTER STAFF
The BBN STC Newsletter is edited by Debbie
Melone and Cheryl Mammone, with help from many
others.
Butterfly is a trademark of Bolt Beranek and Newman Inc.
12
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