An algorithm for the synthesis of NAND logic networks using a diagrammatic approach

A diagrammatic approach is presented for the synthesis of multilevel NAND networks realizing combinational logic expressions. The network synthesized is restricted to only uncomplemented inputs. The synthesis algorithm involves the determination of minimum sum of products and product of sums expressions for a Boolean function, construction of an α-ß diagram from these expressions followed by implementation with NAND gates directly from the diagram. The resulting network is a minimal or near minimal NAND gate realization of the given function. The algorithm is applicable to completely or incompletely specified Boolean functions and is extended to include NOR synthesis --Abstract, page 2

Implementation of recursive algorithms for delay-time estimation using the fast Walsh transform

Use of the fast Walsh transform to resolve noisy signals into Walsh function series to digitally implement maximum-likelihood parameter estimators for real-time use is investigated. Realization of estimators which seek a null in the derivative of the log-likelihood function, instead of direct maximization, results in feedback algorithms which yield considerable savings in computation time and storage. Performance of these feedback delay-estimation algorithms is characterized in terms of mean-squared error (MSE) and response to a delay step by Monte Carlo simulation. The effect of changing the number of points in the transform on the MSE is also investigated. Hard limiting of the estimator input signal is simulated to represent the limited range of an analog-to-digital converter. Initial time estimates indicate that it is indeed feasible to use the algorithms presented to perform delay estimation in real time. The relative merits of implementing estimators with dedicated hardware, software, and/or firmware is also discussed --Abstract, page ii

The Ursinus Weekly, January 15, 1951

Dean\u27s Office announces list of February graduates • Rice tells group democracies must unite in federation • YM-YW cabinet plans February 10th retreat • Thespians to give one-act play as February 6 group production • Debaters meet LaSalle • Weekly staff reshuffled, enlarged by Board • MSGA hands down judicial decisions at special meeting • New concessions given Ruby, Norris Cleaners • Council to hold Lorelei; Negotiating Leigh\u27s return • Morrison reviews food situation with student councils • Ruby to assess groups • Dr. McClure attends educational meeting • Lantern announces deadline • Busy Jill-of-all-trades helps seven bosses • Course evaluation sheds illumination and shows discrimination • Late PMC splurge tops fired-up Grizzlies, 78-73 • Injury-riddled mat squad sustains pair of setbacks • Bruins nip Fords 62-61 with last minute rally • Girls\u27 basketball squad opens season against Bryn Mawr girls • Chess club winshttps://digitalcommons.ursinus.edu/weekly/1557/thumbnail.jp

The Ursinus Weekly, May 14, 1951

Robert Herber chosen for study abroad • Dramatic fraternity takes in new members • Debating Club elects • Mary MacPherson crowned May Queen before large crowd; Arsenic run registers success • Senior announcements available; Meeting set • Tom Davis elected MSGA president; Feulner is V. P. • Y doggie roast planned • Jay Ely chosen head of musical organizations • Classes vote for officers; Council named • Women\u27s dorms elect new representatives • Editorials: Oaths of loyalty? • Great debate continues • Ye olde cricket game • MSGA history shows how present system developed • Sizzling, simpering sunbathers seek solar solace! • Curtis teams vie for championships • Swarthmore jayvees defeat Ursinus girls\u27 net team, 3-2 • Bearettes trounce weak Beaver ten; Spencer fans 11 • Three records broken, another tied as Swarthmore wins triangular meet • Tennis men extend streak to five; Delaware beaten • Snell\u27s Belles continue undefeated as they roll over Chestnut Hill, 31-2 • LaSalle pounds three U hurlers in 15-4 landslide • Muhlenberg diamond squad scores shutout victory over Ursinus nine • Netmen down Dragon squad • Ursinus Women\u27s Club invited to lecture • Newman Club holds Communion, breakfast • Chi Alpha to electhttps://digitalcommons.ursinus.edu/weekly/1569/thumbnail.jp

The Ursinus Weekly, February 26, 1951

Senior musical to revive era of flapper, prohibition • IRC to discuss U.S. foreign policy • Food council conducts review of situation here • Big top chosen theme of freshman dance, March 2 • Book review given • Quartet sings to bank cashier, endorses faulty check vocally • Time features successful industrialist, E. D. Bransome, former student here • Play books in Library • 1936 Ursinus graduate attains USAF honors • Campus March of dimes nets $34 total; Maples heads list • Board discloses interest in armed service units • Audience to enter mood of Tuesday\u27s suspenseful drama • Summer students asked to sign up • 29 delegates attend Philadelphia debate • Hess enumerates ways of using law training • WAA abandons plans for annual minstrel show; To sell socks • FTA considers courses • Editorial: An Ursinus community chest? • Reflections on mealtime • Weekly asks: What do you think of having an ROTC unit at a church-related college? • Canine King Henry lounges on campus, carries schedule of dog-ology, barking • Dr. J. H. A. Bomberger, first Ursinus president, led college through difficulties of early years • Juniata, too, has mystery balls • Campus agents promote local sale of cigarettes • Glenwood Memorial recalls dim past, puzzles over current popular usage • George Gay, Ursinus immortal, had brilliant grid career • Bucknell Bisons trounce matmen 29-5 as Helfferich posts lone win for locals • Battling Bruins rebound to edge Dragons 74-70 • Bryn Mawr bests swimmers, 19-18 • Belles post second victory of season • Bears rout cadets 85-71 as league race tightens • Brodbeck I clinches tie in intramurals • Y activities to center around Wednesday night fireside chats • Lintner heads Red Cross • 3 French Club members attend dinner in Philadelphia church • Dr. Allan Rice to address Lions on Atlantic Union • Juniors name committee heads • Dolman reads humorous work on Education of Hyman Kaplanhttps://digitalcommons.ursinus.edu/weekly/1560/thumbnail.jp

Automated Additive Construction (AAC) for Earth and Space Using In-situ Resources

Using Automated Additive Construction (AAC), low-fidelity large-scale compressive structures can be produced out of a wide variety of materials found in the environment. Compressionintensive structures need not utilize materials that have tight specifications for internal force management, meaning that the production of the building materials do not require costly methods for their preparation. Where a certain degree of surface roughness can be tolerated, lower-fidelity numerical control of deposited materials can provide a low-cost means for automating building processes, which can be utilized in remote or extreme environments on Earth or in Space. For space missions where every kilogram of mass must be lifted out of Earth’s gravity well, the promise of using in-situ materials for the construction of outposts, facilities, and installations could prove to be enabling if significant reduction of payload mass can be achieved. In a 2015 workshop sponsored by the Keck nstitute for Space Studies, on the topic of Three Dimensional (3D) Additive Construction For Space Using In-situ Resources, was conducted with additive construction experts from around the globe in attendance. The workshop explored disparate efforts, methods, and technologies and established a proposed framework for the field of Additive Construction Using In-situ Resources. This paper defines the field of Automated Additive Construction Using In-situ Resources, describes the state-of-the-art for various methods, establishes a vision for future efforts, identifies gaps in current technologies, explores investment opportunities, and proposes potential technology demonstration missions for terrestrial, International Space Station (ISS), lunar, deep space zero-gravity, and Mars environments

The Ursinus Weekly, April 23, 1951

Students elect Hartzel, Hall, Ely, Landis: Women\u27s government, YM-YWCA, WAA choose new organization heads • Drs. Armstrong, Mattern, Baker to be speakers • Pa. Dutch film scheduled for benefit show • Nancy Bare and Jackie Keller to share big Arsenic role • Six juniors receive Cub and Key memberships for outstanding work • Lantern deadline set for Friday • Barbara Crawford crowned queen of Junior Prom; 4 attendants named • Editorials: Nominations open; Voting results analyzed • French situation reversed • Truman vs MacArthur • Letters to the editor • Weekly back issues yield untold wealth of pertinent advertisements • Recordak machine aids in library efficiency • Posting of exams recalls looming fate of students • Baseball field dedicated in honor of Dr. John Price • Girls\u27 tennis team downs Swarthmore for second victory • Curtis takes lead in intramural loop • Netmen lose opener to Haverford; Girls triumph over Chestnut Hill, 4-1 • Bears defeat Pharmacy to gain initial triumph, 14-5 • Bears defeat Haverford for second victory, 7-5 • Tennis team wins first court game • Cumpstone breaks own javelin mark as Grizzlies lose • Curtain Club levies charge for using stage materials • Freshmen, Sophs announce picnic at Island Grove • Blood donors must register, get permission if under-age • Dr. Phillips reads unknown Kipling short story to group • Curtain Club to elect • Varsity Club show ready for production Friday night • Red Cross to sponsor water safety instructor\u27s course • Seniors plan picnic • French Club gives recital featuring pianists, vocalists • Newman Club film slated • Nels Fellman elected head of Delta Pi Sigma frathttps://digitalcommons.ursinus.edu/weekly/1566/thumbnail.jp