294 research outputs found
Analysis and simulation of Wiseman hypocycloid engine
No full textabstract: This research studies an alternative to the slider-crank mechanism for internal combustion engines, which was proposed by the Wiseman Technologies Inc. Their design involved replacing the crankshaft with a hypocycloid gear assembly. The unique hypocycloid gear arrangement allowed the piston and connecting rod to move in a straight line creating a perfect sinusoidal motion, without any side loads. In this work, the Wiseman hypocycloid engine was modeled in a commercial engine simulation software and compared to slider-crank engine of the same size. The engine’s performance was studied, while operating on diesel, ethanol, and gasoline fuel. Furthermore, a scaling analysis on the Wiseman engine prototypes was carried out to understand how the performance of the engine is affected by increasing the output power and cylinder displacement. It was found that the existing 30cc Wiseman engine produced about 7% less power at peak speeds than the slider-crank engine of the same size. These results were concurrent with the dynamometer tests performed in the past. It also produced lower torque and was about 6% less fuel efficient than the slider-crank engine. The four-stroke diesel variant of the same Wiseman engine performed better than the two-stroke gasoline version. The Wiseman engine with a contra piston (that allowed to vary the compression ratio) showed poor fuel efficiency but produced higher torque when operating on E85 fuel. It also produced about 1.4% more power than while running on gasoline. While analyzing effects of the engine size on the Wiseman hypocycloid engine prototypes, it was found that the engines performed better in terms of power, torque, fuel efficiency, and cylinder brake mean effective pressure as the displacement increased. The 30 horsepower (HP) conceptual Wiseman prototype, while operating on E85, produced the most optimum results in all aspects, and the diesel test for the same engine proved to be the most fuel efficient.The final version of this article, as published in Cogent Engineering, can be viewed online at: https://www.cogentoa.com/article/10.1080/23311916.2014.98840
Performance and Scaling Analysis of a Hypocycloid Wiseman Engine
No full textabstract: The slider-crank mechanism is popularly used in internal combustion engines to convert the reciprocating motion of the piston into a rotary motion. This research discusses an alternate mechanism proposed by the Wiseman Technology Inc. which involves replacing the crankshaft with a hypocycloid gear assembly. The unique hypocycloid gear arrangement allows the piston and the connecting rod to move in a straight line, creating a perfect sinusoidal motion. To analyze the performance advantages of the Wiseman mechanism, engine simulation software was used. The Wiseman engine with the hypocycloid piston motion was modeled in the software and the engine's simulated output results were compared to those with a conventional engine of the same size. The software was also used to analyze the multi-fuel capabilities of the Wiseman engine using a contra piston. The engine's performance was studied while operating on diesel, ethanol and gasoline fuel. Further, a scaling analysis on the future Wiseman engine prototypes was carried out to understand how the performance of the engine is affected by increasing the output power and cylinder displacement. It was found that the existing Wiseman engine produced about 7% less power at peak speeds compared to the slider-crank engine of the same size. It also produced lower torque and was about 6% less fuel efficient than the slider-crank engine. These results were concurrent with the dynamometer tests performed in the past. The 4 stroke diesel variant of the same Wiseman engine performed better than the 2 stroke gasoline version as well as the slider-crank engine in all aspects. The Wiseman engine using contra piston showed poor fuel efficiency while operating on E85 fuel. But it produced higher torque and about 1.4% more power than while running on gasoline. While analyzing the effects of the engine size on the Wiseman prototypes, it was found that the engines performed better in terms of power, torque, fuel efficiency and cylinder BMEP as their displacements increased. The 30 horsepower (HP) prototype, while operating on E85, produced the most optimum results in all aspects and the diesel variant of the same engine proved to be the most fuel efficient.Dissertation/ThesisM.S.Tech Mechanical Engineering 201
Universe of Wonder: Galaxies, Stars, Planets, and Life
No full textCo-sponsored by the Reuter Professorship of Science and Religion and the School of Theology and Seminar. Dr. Jennifer Wiseman is an astrophysicist, author, and speaker. She studied physics at MIT, co-discovering comet Wiseman-Skiff in 1987, and is currently a senior astrophysicist at the Goddard Space Flight Center.
Join Dr. Jennifer Wiseman, astrophysicist as she considers some of the coolest discoveries in modern astronomy and the highest priorities for future exploration and how they impact faith, hope, and love on planet Earth
Critical Evaluation and Optimization of a Hypocycloid Wiseman Engine
No full textabstract: In nearly all commercially successful internal combustion engine applications, the slider crank mechanism is used to convert the reciprocating motion of the piston into rotary motion. The hypocycloid mechanism, wherein the crankshaft is replaced with a novel gearing arrangement, is a viable alternative to the slider crank mechanism. The geared hypocycloid mechanism allows for linear motion of the connecting rod and provides a method for perfect balance with any number of cylinders including single cylinder applications. A variety of hypocycloid engine designs and research efforts have been undertaken and produced successful running prototypes. Wiseman Technologies, Inc provided one of these prototypes to this research effort. This two-cycle 30cc half crank hypocycloid engine has shown promise in several performance categories including balance and efficiency. To further investigate its potential a more thorough and scientific analysis was necessary and completed in this research effort. The major objective of the research effort was to critically evaluate and optimize the Wiseman prototype for maximum performance in balance, efficiency, and power output. A nearly identical slider crank engine was used extensively to establish baseline performance data and make comparisons. Specialized equipment and methods were designed and built to collect experimental data on both engines. Simulation and mathematical models validated by experimental data collection were used to better quantify performance improvements. Modifications to the Wiseman prototype engine improved balance by 20 to 50% (depending on direction) and increased peak power output by 24%.Dissertation/ThesisM.S.Tech Mechanical Engineering 201
Great River Legs
No full textGreat River Legs is a lyric collection of prose poetry, creative nonfiction, and found poetry. This creative response documents my 1,398 mile, 25-day bicycle ride from Muscatine, Iowa, to Baton Rouge, Louisiana, between October 2017–March 2018. The journey took place in legs over breaks during the school year, with two additional back-to-back weekend rides that started the adventure.
In her latest book, Great River Legs, Laura Madeline Wiseman takes you on an intimate journey as she weaves in and out of a cross-country, long distance bike ride. In this beautifully curated book that includes prose poetry, creative non-fiction and found poetry, Wiseman embraces the many parts of herself—cyclist, data collector, meditation practitioner, nature lover, quiet observer—and brings them together in a seamless, profound, and captivating way. – Dawn Mauricio, author of Mindfulness Meditation for Beginners
In Great River Legs, Laura Madeline Wiseman measures the weeks in papers graded, classes taught, but also in miles ridden alongside rivers, lengths of the journey called “legs.” The book’s great subject is as much the making of narrative as it is an exploration of geography. Are our stories circular, spinning like wheels on a bicycle? Or do our lives move almost linearly like a waterway flowing across the land? Through small bursts of lyric prose, Wiseman explores the ways “we can begin again,” how we test ourselves on paths that are “steep and dangerous” while learning to accept that we can never “control the day’s rotation.” – Jehanne Dubrow, author of throughsmoke: an essay in notes
doi:10.32873/unl.dc.zea.1308https://digitalcommons.unl.edu/zeabook/1109/thumbnail.jp
Review of \u3ci\u3eThe Force of Vocation,\u3c/i\u3e By Adele Wiseman
No full textAdele Wiseman\u27s literary career began with the publication of her acclaimed first novel, The Sacrifice, in 1956. Public success and scholarly praise of the novel were followed by the Governor General\u27s Literary Award for fiction. Though Wiseman continued to write plays, fiction, memoirs, and essays throughout her career, she never again enjoyed the success of her earliest novel. In The Force of Vocation, the first booklength study of Wiseman\u27s work, Ruth Panofsky attempts to account for the rise and fall of this Jewish Canadian woman of letters.
Responding to the lack of attention to the publishing side of writers\u27 lives in biographies of Canadian authors, Panofsky examines Wiseman as a public author, one who negotiated her career through artistic agency and a stubborn refusal to revise most of her work. Panofsky accounts for the development of Wiseman\u27s writing career, which she suggests can be read as the progressive loss of readership and literary recognition, by studying her interactions with literary agents, editors, publishers, and mentors as well as the reception of her work in Canada, the U.S., and Europe.
Following the success of The Sacrifice, for example, Wiseman ignored her friends\u27 and publishers\u27 pleas for a second novel resembling the style and content of the first. Instead, she turned to writing plays, a genre with little market potential. Similarly, Wiseman waited twelve years before seeking to publish her second novel, Crackpot. The prolonged interval between novels, coupled with the discursive, female-centered structure of the text, made it difficult for Wiseman to secure a publisher. After nearly twenty rejections, Jack McClelland of McClelland and Stewart agreed to read the manuscript, after which he recommended several changes. Committed to the integrity of her artistic vision, Wiseman agreed to few of the suggested revisions. As the title suggests, The Force of Vocation makes clear that Adele Wiseman viewed writing as a calling, one of high moral value and responsibility
Aboriginal artefacts on the continental shelf reveal ancient drowned cultural landscapes in northwest Australia
No full textThis article reports Australia’s first confirmed ancient underwater archaeological sites from the continental shelf, located off the Murujuga coastline in north-western Australia. Details on two underwater sites are reported: Cape Bruguieres, comprising > 260 recorded lithic artefacts at depths down to −2.4 m below sea level, and Flying Foam Passage where the find spot is associated with a submerged freshwater spring at −14 m. The sites were discovered through a purposeful research strategy designed to identify underwater targets, using an iterative process incorporating a variety of aerial and underwater remote sensing techniques and diver investigation within a predictive framework to map the submerged landscape within a depth range of 0–20 m. The condition and context of the lithic artefacts are analysed in order to unravel their depositional and taphonomic history and to corroborate their in situ position on a pre-inundation land surface, taking account of known geomorphological and climatic processes including cyclone activity that could have caused displacement and transportation from adjacent coasts. Geomorphological data and radiometric dates establish the chronological limits of the sites and demonstrate that they cannot be later than 7000 cal BP and 8500 cal BP respectively, based on the dates when they were finally submerged by sea-level rise. Comparison of underwater and onshore lithic assemblages shows differences that are consistent with this chronological interpretation. This article sets a foundation for the research strategies and technologies needed to identify archaeological targets at greater depth on the Australian continental shelf and elsewhere, building on the results presented. Emphasis is also placed on the need for legislation to better protect and manage underwater cultural heritage on the 2 million square kilometres of drowned landscapes that were once available for occupation in Australia, and where a major part of its human history must lie waiting to be discovered
Book launch and discussion
No full textBook launch event for Nick Drake: Dreaming England (Reaktion 2013) at the NN Cafe, Number 9 Guildhall Road, Northampton, NN1 1DP, Thursday 3rd October 2013.
Author Nathan Wiseman-Trowse talked about and read from his book on the musician Nick Drake. Music was provided by Gregg Cave and Ant Savage and the book's photographer Paul Hillery DJd. The event was publically promoted and around sixty attended
Catullan questions revisited /
No full textCatullan Questions Revisited offers a new insight into the brilliant poet who loved an aristocratic girl, attacked Julius Caesar and became a satirical playwright. Insisting on scrupulous use of the primary sources, Peter Wiseman combines textual, historical and even archaeological evidence to explode the orthodox view of Catullus' life and work. 'Lesbia' was not a woman in her thirties, as has been believed for 150 years, but a girl only recently married; Catullus' poems were written for performance, private or public, and it was only in 54 BC, at what he saw as the turning-point of his life, that he collected their texts into a sequence of probably seven volumes. His subsequent literary career, equally successful but much less well attested, was as a 'mime'-dramatist. This book is intended for everyone who is interested in poetry and history, and who does not believe that literary texts exist in a vacuum.Title from publisher's bibliographic system (viewed on 13 Oct 2022).Part One. Who was Lesbia? ; How many books? ; Where was the audience? ; What were the long poems? -- Part Two. How Gallic were the Transpadanes? ; Why is Ariadne naked? ; Clodia : some imaginary lives.Catullan Questions Revisited offers a new insight into the brilliant poet who loved an aristocratic girl, attacked Julius Caesar and became a satirical playwright. Insisting on scrupulous use of the primary sources, Peter Wiseman combines textual, historical and even archaeological evidence to explode the orthodox view of Catullus' life and work. 'Lesbia' was not a woman in her thirties, as has been believed for 150 years, but a girl only recently married; Catullus' poems were written for performance, private or public, and it was only in 54 BC, at what he saw as the turning-point of his life, that he collected their texts into a sequence of probably seven volumes. His subsequent literary career, equally successful but much less well attested, was as a 'mime'-dramatist. This book is intended for everyone who is interested in poetry and history, and who does not believe that literary texts exist in a vacuum
Smaller Flight Data Recorders
No full textData captured by flight data recorders are generally stored on the system’s embedded hard disk. A common problem is the lack of storage space on the disk. This lack of space for data storage leads to either a constant effort to reduce the space used by data, or to increased costs due to acquisition of additional space, which is not always possible. File compression can solve the problem, but carries with it the potential drawback of the increased overhead required when writing the data to the disk, putting an excessive load on the system and degrading system performance. The author suggests the use of an efficient compressed file system that both compresses data in real time and ensures that there will be minimal impact on the performance of other tasks
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