Mark Adler (born 1959) is an American software engineer. He is best known for his work in the field of

data compression In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compressio ...

as the author of the

Adler-32 Adler-32 is a checksum algorithm written by Mark Adler in 1995, modifying Fletcher's checksum. Compared to a cyclic redundancy check of the same length, it trades reliability for speed (preferring the latter). Adler-32 is more reliable than Fletcher ...

checksum A checksum is a small-sized block of data derived from another block of digital data for the purpose of detecting errors that may have been introduced during its transmission or storage. By themselves, checksums are often used to verify data ...

function, and a co-author together with Jean-loup Gailly of the zlib compression

library A library is a collection of materials, books or media that are accessible for use and not just for display purposes. A library provides physical (hard copies) or digital access (soft copies) materials, and may be a physical location or a vir ...

and

gzip gzip is a file format and a software application used for file compression and decompression. The program was created by Jean-loup Gailly and Mark Adler as a free software replacement for the compress program used in early Unix systems, and i ...

. He has contributed to Info-ZIP, and has participated in developing the Portable Network Graphics (PNG) image format. Adler was also the

Spirit Spirit or spirits may refer to: Liquor and other volatile liquids * Spirits, a.k.a. liquor, distilled alcoholic drinks * Spirit or tincture, an extract of plant or animal material dissolved in ethanol * Volatile (especially flammable) liquids, ...

Cruise Mission Manager for the

Mars Exploration Rover NASA's Mars Exploration Rover (MER) mission was a robotic space mission involving two Mars rovers, '' Spirit'' and '' Opportunity'', exploring the planet Mars. It began in 2003 with the launch of the two rovers to explore the Martian surface ...

mission.

Early life and education

Adler was born in

Miami Miami ( ), officially the City of Miami, known as "the 305", "The Magic City", and "Gateway to the Americas", is a coastal metropolis and the county seat of Miami-Dade County in South Florida, United States. With a population of 442,241 at ...

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...

and raised as the only child of David and Bertha Adler. Adler earned his

Bachelor of Science A Bachelor of Science (BS, BSc, SB, or ScB; from the Latin ') is a bachelor's degree awarded for programs that generally last three to five years. The first university to admit a student to the degree of Bachelor of Science was the University o ...

in mathematics and

Master of Science A Master of Science ( la, Magisterii Scientiae; abbreviated MS, M.S., MSc, M.Sc., SM, S.M., ScM or Sc.M.) is a master's degree in the field of science awarded by universities in many countries or a person holding such a degree. In contrast t ...

in electrical engineering degrees from the

University of Florida The University of Florida (Florida or UF) is a public land-grant research university in Gainesville, Florida. It is a senior member of the State University System of Florida, traces its origins to 1853, and has operated continuously on its ...

in 1981 and 1985, respectively. In 1990, Adler earned his

Ph.D. A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is ...

physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ...

from the

California Institute of Technology The California Institute of Technology (branded as Caltech or CIT)The university itself only spells its short form as "Caltech"; the institution considers other spellings such a"Cal Tech" and "CalTech" incorrect. The institute is also occasional ...

Career

Post-doctoral

After his doctorate, Adler worked for

Hughes Aircraft The Hughes Aircraft Company was a major American aerospace and defense contractor founded on February 14, 1934 by Howard Hughes in Glendale, California, as a division of Hughes Tool Company. The company was known for producing, among other pro ...

in their Space and Communications Group, working on diverse projects including the analysis of the effects of

X-ray bursts X-ray bursters are one class of X-ray binary stars exhibiting X-ray bursts, periodic and rapid increases in luminosity (typically a factor of 10 or greater) that peak in the X-ray region of the electromagnetic spectrum. These astrophysical sys ...

on satellite cables, development of new

error-correcting codes In computing, telecommunication, information theory, and coding theory, an error correction code, sometimes error correcting code, (ECC) is used for controlling errors in data over unreliable or noisy communication channels. The central idea is ...

, designing an automobile anti-theft key, and digital image and video compression research ( wavelets and MPEG-2).

Mars exploration

From 1992 through 1995, Adler was the Lead Mission Engineer on the Cassini–Huygens mission. Afterwards, he became the

Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury. In the English language, Mars is named for the Roman god of war. Mars is a terrestrial planet with a thin at ...

Exploration Program Architect at the

Jet Propulsion Laboratory The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in the City of La Cañada Flintridge, California, United States. Founded in the 1930s by Caltech researchers, JPL is owned by NASA an ...

(JPL) from 1996 through 1998, which meant that Adler was responsible for planning the

exploration missions from 2001 on as well as handling inter-project engineering issues for missions in flight and in development during the time. In 1999 and early 2000, Adler was the Mission and Systems Manager and Chief Engineer for the Mars Sample Return project, which was to launch three missions in 2003 and 2005 to bring Martian samples back to Earth in 2008. The project was canceled after the failure of

Mars Polar Lander The Mars Polar Lander, also known as the Mars Surveyor '98 Lander, was a 290-kilogram robotic spacecraft lander launched by NASA on January 3, 1999, to study the soil and climate of Planum Australe, a region near the south pole on Mars. It form ...

Mars Exploration Rover mission

Adler initiated and led a three-and-a-half-week study on the concept that was later selected as the

(MER) mission for 2003. He has served as the Deputy Mission System Manager, the Acting Project Engineer, the Deputy Assembly, Test, and Launch Operations Manager, the Landing Site Selection Engineer, and the

Mission Manager.

Low Density Supersonic Decelerator

Adler is currently the project chief of the Low Density Supersonic Decelerator.

Personal life and interests

Adler is an instrument-rated private

pilot An aircraft pilot or aviator is a person who controls the flight of an aircraft by operating its directional flight controls. Some other aircrew members, such as navigators or flight engineers, are also considered aviators, because they a ...

, a certified scuba diver, and an amateur

theater Theatre or theater is a collaborative form of performing art that uses live performers, usually actors or actresses, to present the experience of a real or imagined event before a live audience in a specific place, often a stage. The perform ...

actor An actor or actress is a person who portrays a character in a performance. The actor performs "in the flesh" in the traditional medium of the theatre or in modern media such as film, radio, and television. The analogous Greek term is (), li ...

. He lives with Diana St. James in La Cañada, California. They have two children, Joshua and Zachary. St. James works at the

and acts in and directs theatrical performances.

Awards and recognition

Together with co-author Jean-loup Gailly, Adler received the 2009 USENIX Software Tools User Group (STUG) award for their contributions to FLOSS algorithms for data compression.

References

{{DEFAULTSORT:Adler, Mark 1959 births Living people People from Miami American computer scientists 20th-century American mathematicians 21st-century American mathematicians 21st-century American physicists GNU people People from La Cañada Flintridge, California California Institute of Technology alumni University of Florida College of Engineering alumni NASA people Jet Propulsion Laboratory