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Robert (Bob) Bernecky is a Canadian computer scientist notable as a designer and implementer of APL. His APL career started at [[I.P. Sharp Associates|IPSA]] in 1971.
'''Robert (Bob) Bernecky''' is an APL designer and implementer notable for significant contributions to [[SHARP APL]] and developing an APL compiler, [[APEX]].


Bernecky's first published APL work concerned with speeding up the iota and epsilon ([[index-of]] and [[membership]]) [[primitive function]]s by orders of magnitude. While at IPSA, he was a colleague of [[Roger Hui]], Dick Lathwell, [[Gene McDonnell]], [[Roger Moore]], [[Arthur Whitney]], and APL's inventor [[Ken Iverson]]. He continued on after IPSA was acquired by Reuters on 1987-04-01, and left Reuters in 1990 to found Snake Island Research. He works on APL compiler and parallel-processing technology to this day.
Bernecky first began working with APL at [[I.P. Sharp Associates]] in 1971. His first APL-related publication, in 1973, described performance improvements to SHARP's [[Index-Of]] and [[Membership]] implementations. In addition to his implementation work, Bernecky contributed to the design of [[comparison tolerance]], [[Replicate]] (extending [[Compress]]), and the [[Rank operator]] in [[SHARP APL]]. He remained at IPSA for three years after it was acquired by Reuters in 1987, leaving in 1990 to found his current company Snake Island Research and work on the [[APEX]] APL compiler. While at Snake Island Research he enrolled in graduate studies at the [[wikipedia:University of Toronto|University of Toronto]]; he obtained a Master of Science degree in 1997 with a thesis titled "APEX: The APL Parallel Executor".


Bernecky holds the Master of Science degree from the University of Toronto.
== Publications ==
 
=== SHARP APL Technical Notes ===
 
* SATN-22: APL Worspace Transfer (with Mike Symes). 1979-01-01.
* SATN-23: [https://www.jsoftware.com/papers/satn23.htm Comparison Tolerance]. 1977-06-10.
* SATN-34: [[Replicate|Replication]]. 1980-08-15.
* SATN-45: [https://www.jsoftware.com/papers/satn45.htm Language Extensions of May 1983] (with [[Ken Iverson]], [[Eugene McDonnell]], Robert Metzger, and J. Henri Schueler). 1983-05-02.


== Publications ==
=== APL conferences ===
<div style="column-width:30em">
* [[APL73]]: Speeding up Dyadic Iota and Dyadic Epsilon.
* [[APL80]]: Operators and Enclosed Arrays ([https://www.jsoftware.com/papers/opea.htm web]). With [[Ken Iverson]].
* [[APL81]]: [https://doi.org/10.1145/800142.805333 Representations for enclosed arrays].
* [[APL84]]: [https://doi.org/10.1145/800058.801075 Function arrays].
* [[APL85]]: [https://doi.org/10.1145/17701.255358 Writing interpreters (panel)]. With Geno Coschi, James Ryan, [[Bob Smith]], [[Philip Van Cleave|Philip A. Van Cleave]], and James Wheeler.
* [[APL86]]: [https://doi.org/10.1145/22415.22039 APL: A prototyping language].
* [[APL87]]: [https://doi.org/10.1145/28315.28339 Component file systems and the APL standard]. With Maxine Hersch.
* [[APL88]]: [https://doi.org/10.1145/55626.55632 An introduction to function rank].
* [[APL89]]: [https://doi.org/10.1145/328877.328879 Profiling, performance, and perfection (tutorial session)].
* [[APL90]]: [https://doi.org/10.1145/97808.97821 ACORN: APL to C on real numbers]. With [[Charles Brenner]], Stephen B. Jaffe, and George P. Moeckel.
* [[APL91]]: [https://doi.org/10.1145/114054.114059 Gerunds and representations]. With [[Roger Hui|Roger K. W. Hui]].
* [[APL92]]: [https://doi.org/10.1145/144045.144069 Compiler tools in APL]. With Gert Osterburg.
* [[APL93]]: [https://doi.org/10.1145/166197.166200 Array morphology].
* [[APL93]]: [https://doi.org/10.1145/166197.166201 The role of APL and J in high-performance computation].
* [[APL95]]: [https://doi.org/10.1145/206913.206949 The role of dynamic programming & control structures in performance].
* [[APL98]]: [https://doi.org/10.1145/327559.327603 EGREGION: a branch coverage tool for APL].
* [[APL98]]: [https://doi.org/10.1145/327559.327614 Reducing computational complexity with array predicates].
* [[APL03]]: [https://doi.org/10.1145/882067.882071 An SPMD/SIMD parallel tokenizer for APL].
* [[APL03]]: [https://doi.org/10.1145/882067.882072 Bitslice: representation without taxation]. With Peter Wooster.
* [[APL2010]]: Mask and Mesh Revisited.
</div>


=== Dyalog user meetings ===
=== Dyalog user meetings ===

Revision as of 11:44, 17 March 2020

Robert (Bob) Bernecky is an APL designer and implementer notable for significant contributions to SHARP APL and developing an APL compiler, APEX.

Bernecky first began working with APL at I.P. Sharp Associates in 1971. His first APL-related publication, in 1973, described performance improvements to SHARP's Index-Of and Membership implementations. In addition to his implementation work, Bernecky contributed to the design of comparison tolerance, Replicate (extending Compress), and the Rank operator in SHARP APL. He remained at IPSA for three years after it was acquired by Reuters in 1987, leaving in 1990 to found his current company Snake Island Research and work on the APEX APL compiler. While at Snake Island Research he enrolled in graduate studies at the University of Toronto; he obtained a Master of Science degree in 1997 with a thesis titled "APEX: The APL Parallel Executor".

Publications

SHARP APL Technical Notes

APL conferences

Dyalog user meetings

External links

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