D. Decker, BA, MS
Department of Computer Science
sure to check Blackboard Academic Suite at webcourses.niu.edu
for your class and section!
Spring 2020 Teaching Schedule:
CSCI 360-2 - Assembler Programming: 9:00-9:50 AM on MWF in PM 251
CSCI 360-0PE1 - Assembler Programming: 12:00-2:45 PM on Th at Harper College in Palatine, Illinois, in Building D, Room 278 (D-278)
CSCI 428-1/524-00P1 - Advanced Android Mobile Device Programming: 2:00-3:15 PM on MW in Cole 106
CSCI 465-1 - Enterprise Application Environments: 11:00-11:50 AM on MWF in PM 251
Spring 2020 Office Hours:
10:00-11:00 AM on MWF
1:00-1:45 PM on MW
10:00 AM-12:00 PM on Th in D-264 at Harper College
and by email and appointment
Geoffrey D. Decker, BA, MS
Department of Computer Science
DeKalb, IL 60115-2854
Office: PM 463 and D-264 at Harper College
Department Phone: 815.753.0378
M.S. in Computer
Science Northern Illinois University DeKalb, Illinois
of Kansas Lawrence,
was born in the Missouri River bluff town of Atchison, Kansas
(Amelia Earhart, the famous aviatrix, was born there too!), to a family with
three older sisters. I grew up in the Kansas City
area on the Kansas side in the suburbs of Mission,
Prairie Village, and Overland Park. My father, Kenneth
Decker (1916-1994), was a barber by trade and my mother, Beverly Dege
Decker (1925-2002), when she worked outside the home, did graphic design and art
for a large yearbook publishing company.
graduated from Shawnee Mission
School in Overland Park, Kansas, and attended the University
of Kansas in Lawrence, Kansas, where I completed a B.A. in Music with an
emphasis in Music History. Throughout my time at KU, I played
horn in the
marching band, symphonic band, and symphony orchestra. I also
played as a member of
musicians' union in the semi-professional Lawrence Chamber Players,
Symphony Orchestra, and Lawrence Symphony Orchestra. Besides
playing, I studied some orchestral conducting with Drs. George
and Zuohuang Chen and horn with Professor David
graduating from KU, I worked in various jobs for a few years and eventually moved to DeKalb,
Illinois, to begin the M.S. in Computer
Science degree program at Northern
It was an eye-opening experience and difficult but I found a
niche in developing software and systems that I enjoy very much.
graduating from NIU, I worked 11 years as a software developer in Kansas City, Missouri, at both Kemper Service
Company, the transfer agency for Kemper Mutual Funds, and DST Systems, Inc., a record-keeping company for the mutual fund industry.
At Kemper and DST, I developed systems in COBOL, Assembler, C, C++ and CA-IDEAL, and
spent two years as an upper-level technical recruiter in DST's Employment
My final two years at DST were spent in systems programming.
While at DST, I founded and conducted the DST Symphony Orchestra
and the DST Wind Ensemble, both made up of DST employees, their
families and friends. I was soon invited to conduct the DST Wind Ensemble and members
Kansas City Symphony in an outdoor concert inaugurating Kansas City's Avenue of the Arts.
In 2001, I decided it was time for a change and began my career as an
instructor at Northern Illinois
had taught courses in COBOL, Systems Analysis and Design, Music Appreciation, and
the humanities at National American
University in Kansas City, Missouri,
but wanted to teach full time. Northern Illinois
University's Department of
Computer Science provides me that
opportunity, and I am very happy to be here working with many talented
students. I was awarded the Department of
Computer Science's Excellence in Teaching Award in both 2005 and
2019, an honor I appreciate very much. With the Spring 2020
semester, I continue my 19th year and begin my 56th semester teaching
NIU. I love teaching! It's the best job in the world!
Finally, I regularly play French horn in both the Kishwaukee Symphony Orchestra and the DeKalb Municipal
also write the program notes for
the Kishwaukee Symphony’s concert programs. As often as I
can, I act as an IT consultant and review classical CDs and downloadable music files for various
Concerts in which I'm involved during the 2019-2020 concert season:
Visit DeKalb Municipal Band Concerts soon for information about the summer 2020 season.
Visit Kishwaukee Symphony Orchestra
for more information about the 2019-2020 season.
- Operating Systems - zOS, primarily.
Analysis and Design and OO Systems Analysis and Design.
- Several of my papers on music:
Meistersinger von Nürnberg
- Playing the horn
(mistakenly known as the French horn to some although there's little
that's French about it or its history).
- Classical Music -
The composers Mozart, Beethoven, Brahms, Bach, Bruckner, Wagner, Richard
Strauss, Tschaikowsky, Elgar, Schostakowitsch, Haydn, Händel, Britten,
Berg, Berlioz, Schoenberg, Webern, Debussy, Sousa, Schumann, Ravel, Verdi,
Donizetti, Bellini, Puccini, Grieg, Mahler, Prokofiev, the Strauss
Family, Johann I, Josef, Eduard, and Johann II, and Stravinsky, and
the conductors Herbert von Karajan,
Arturo Toscanini, Wilhelm
Furtwängler, Karl Böhm, Carlos Kleiber, Erich Kleiber, Sir Georg Solti, Dmitri
Mitropoulos, Fritz Reiner, Leonard
Bernstein, Hans Knappertsbusch, Clemens Krauss, Joseph Keilberth,
Eugen Jochum, Rafael Kubelik, Sir Adrian Boult, Leopold Stokowski,
Arthur Nikisch, and Carlo Maria Giulini, George
Szell...............all are dead and gone, sorry to say.
- The Vienna
Philharmonic Orchestra (Wiener Philharmoniker), the Berlin Philharmonic
Orchestra (Berliner Philharmoniker), the Royal Concertgebouw Orchestra of Amsterdam, and the Chicago Symphony -
performances and recordings by these favorite great orchestras.
- Traveling to
Europe, especially Vienna, my
favorite city in the world.
- Period instrument
- American and
European History, especially that of the American Revolution, the
American Civil War and the Pennsylvania Germans.
Presidential History, especially that of the presidencies of George
Washington, John Adams, John Quincy Adams, Abraham
Lincoln, Theodore Roosevelt, Franklin D. Roosevelt, and
Harry S Truman.
- Westhighland White
- Architecture and
Favorite recipes - Wienerschnitzel
from Time-Life Books' The Cooking of Vienna's Empire
(Hungarian Kettle Goulash) from the same
Paprika Chicken from Wolfgang Puck
Napkin Dumplings from Wolfgang Puck
Tafelspitz/Kavalierspitz (Boiled Beef) from epicurious.com
- The German language
and its literature - reading, writing and speaking it.