1,723,310 research outputs found
Lysak, Leo Mox
No full textLeo Lysak was born on December 4, 1912 in Beausejour, Manitoba to parents Michael and Victoria Lysak. Leo`s mother passed away in 1918, and his father was remarried to Miss Sophia Lasota. In 1924, the Lysak family moved to Southern Alberta, settling near Parkland. Leo had three sisters, Jean, Mary and Laura, and one brother, Albert. At time of enlistment, he was single and working as a farmhand near Foremost. He later married his wife, Minnie.
On October 13, 1942, Leo Lysak enlisted for service with the Royal Canadian Air Force. The next eighteen months were spent training at bases in Calgary, Saskatoon, Dafoe and Lachine. On November 12, 1943, Sergeant Lysak qualified as an air bomber. He arrived in the United Kingdom on April 2, 1944 and was posted to the Royal Air Force for further training.
On August 11, 1944, Sergeant Lysak was a member of a Wellington bomber crew participating in training exercises. At 2305 hours that day, he received multiple injuries when the aircraft crashed under unknown circumstances. Sergeant Lysak was killed instantly and laid to rest at Brookwood Military Cemetery. For his wartime service, he was awarded the Defence Medal, War Medal and Canadian Volunteer Service Medal with Clasp. His wife, Minnie received the Memorial Cross in honour of her husband
A numerical model to calculated field line resonances in Jupiter's magnetosphere
No full textFiles included:
jupflr.pro: IDL routines for calculating frequencies and mode structures of field line resonances
idl routines in jupflr.pdf: Text document giving description of routines in jupflr.pro
model010.zip: zipped file containing data generated by jupflr.pro routinesThe arrival of the Juno satellite at Jupiter has led to an increased interest in the dynamics of the Jovian magnetosphere. Jupiter’s auroral emissions often exhibit quasi-periodic oscillations with periods of tens of minutes. Magnetic observations indicate that ultra-low-frequency (ULF) waves with similar periods are often seen in data from Galileo and other satellites traversing the Jovian magnetosphere. Such waves can be associated with field line resonances, which are standing shear Alfvén waves on the field lines. Using model magnetic fields and plasma distributions, the frequencies of field line resonances and their harmonics on field lines connecting to the main auroral oval have been determined. Time domain simulations of Alfvén wave propagation have illustrated the evolution of such resonances. These studies indicate that harmonics of the field line resonances are common in the 10-40 minute band.National Science Foundation grant AGS-1840891Lysak, Robert L; Song, Yan. (2020). A numerical model to calculated field line resonances in Jupiter's magnetosphere. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/rjsp-kd12
Numerical Model for the propagation of Alfven Waves produced by Jupiter's moon Io
No full textData includes code and display results.We present first results from a new numerical model to describe the propagation of these Alfvén waves in the Io-Jupiter system. The model is cast in magnetic dipole coordinates and includes a dense plasma torus that is centered around the centrifugal equator. Results are presented for two density models, showing the dependence of the interaction on the magnetospheric density. The effect of the conductance of Jupiter’s ionosphere is considered. A model for the development of parallel electric fields is introduced, indicating that the main auroral footprints of Io can generated parallel potentials of up to 100 kV.NASA Grant 80NSSC20K1269 P00002Lysak, Robert L. (2022). Numerical Model for the propagation of Alfven Waves produced by Jupiter's moon Io. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/5cgw-fg87
Lemphoria queenslandica Edginton, Al-Shehbaz & Lysak 2022, sp. nov.
No full text5. Lemphoria queenslandica Edginton, Al-Shehbaz & Lysak, sp. nov. Diagnosis:— Lemphoria queenslandica is easily distinguished from the related L. procumbens and L. eremigena by having ellipsoid to oblong (vs. linear) fruits 2–2.5 (vs. 0.6–1.4) mm wide, 20–40 (vs. ca. 50–70) ovules per ovary, and broadly spatulate to obovate and 3–5-lobed (vs. narrowly oblanceolate and [3–]5–15-lobed) cauline leaves. It also differs from L.procumbens by being pubescent throughout (vs. glabrous). Type:— AUSTRALIA, Queensland, Kentucky Holding, at Dawson River, ca. 48 km NE of Injune, S Central Qld., 25°31‘29“S, 148°53‘32“E, 25 Oct 2011, C. Eddie CPE1965 (Holotype: BRI AQ-819733). Figure 2. Description:—Herbs annual, usually pubescent with spreading trichomes 0.3–0.6 mm long. Stems erect, ca. 40 cm tall, branched. Basal leaves not seen. Cauline leaves obovate to broadly spatulate in outline, strongly 3- or pinnately 5-lobed, to 7 cm long, gradually smaller on the stem distally, sparsely to moderately pubescent; petiole 0.4–2 cm long; lobes dentate, subacute, laterals smaller than terminal one. Racemes corymbose, 20–40-flowered, elongated in fruit; rachis straight; fruiting pedicels ascending to divaricate, 8–16.5 mm long, sparsely to moderately pubescent. Sepals oblong-ovate, ca. 2.5 mm long, sparsely pubescent, hyaline margined; petals white or possibly yellow, ca. 4 × 2 mm, suborbicular, narrowed to claw ca. 2 mm long; stamens 6, tetradynamous, 2–3 mm long; anthers oblong; ovary sparsely pubescent, 20–40 ovuled. Fruits dehiscent, ellipsoid to oblong, 4–6.5 × 2–2.5 mm, sessile, slightly angustiseptate, reticulate veined, sparsely pubescent to subglabrous; septum complete, translucent; style 0.5–0.8 mm long; stigma entire. Seeds uniseriate, oblong to ovoid, plump, 0.7–1 × ca. 0.5 mm, brownish, finely papillate, mucilaginous when wetted; cotyledons incumbent. Phenology: —As the novel species is only known from the type specimen collected on October 25, it is not possible to draw firm conclusions on the length and timing of the fruiting and flowering seasons. However, the inflorescence of the type specimen has mature fruits proximally and new flowers and buds distally. This implies that the species has quite a lengthy flowering and fruiting season. Etymology: —The species epithet is named after the Australian state Queensland. Distribution:— The species is known thus far only from the type collection on the Dawson River, 48 km NE of Injune, south-central Queensland. Discussion: — Lemphoria queenslandica is most closely related to L. eremigena and L. procumbens, which it resembles by having siliques and biseriate seeds. It differs from both of them by the ellipsoid to oblong and slightly angustiseptate (vs. linear and subterete) fruits 2–2.5 (vs. 0.6−1.4) mm wide, fewer (20−40 vs. 50−70) ovules per ovary, and broadly spatulate to obovate (vs. narrowly oblanceolate) and 3−5-lobed [vs. (3−)5−15-lobed] cauline leaves. It differs from the other two species of the genus (L. andraeana and L. humistrata) by the oblong and slightly angustiseptate siliques (vs. strongly angustiseptate and elliptic to suborbicular silicles) and biseriate (vs. uniseriate) seeds in each fruit locule.Published as part of Lysak, Martin A., Edginton, Mark, Zuo, Sheng, Guo, Xinyi, Mandáková, Terezie & Al-Shehbaz, Ihsan A., 2022, Transfer of two Arabidella and two Cuphonotus species to the genus Lemphoria (Brassicaceae) and a description of the new species L. queenslandica, pp. 235-240 in Phytotaxa 549 (2) on page 239, DOI: 10.11646/phytotaxa.549.2.9, http://zenodo.org/record/662286
Updated Fortran program for modeling ULF waves in a three-dimensional magnetosphere
No full textFortran source code for modeling ULF waves in the magnetosphereThis is the update of a three-dimensional code in dipole geometry for modeling Ultra-Low-Frequency (ULF) waves. The previous version is at https://doi.org/10.13020/d1g7-c676. This code has been used in a study of so-called Pi2 pulsations in the magnetosphere, which are waves with a period of 1-2 minutes that are commonly observed during substorms. This code has been used in conjunction with analysis of data from the Van Allen Probes mission.NSF Grant AGS 1840891Lysak, Robert L. (2022). Updated Fortran program for modeling ULF waves in a three-dimensional magnetosphere. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/kbp7-dd42
Fortran code for modeling the propagation of ULF waves in a 3-dimensional dipole magnetosphere
No full textFortran source code for numerical modeling of ULF waves in the magnetosphereThis code allows for the modeling of Ultra-Low-Frequency (ULF) waves in the Earth's magnetosphere. It has been used in a number of publications and presentations at conferences. It takes a prescribed driver in the form of a compression at the outer boundary and follows the propagation of the waves through the magnetosphere and to the ground. The output consists of files each containing snapshots of one component of the electromagnetic field at all points in the simulation volume at an instant of time, in addition to files containing background information such as the Alfven speed profile throughout the simulation.National Science Foundation AGS-1840891Lysak, Robert L; Waters, Colin; Sciffer, Murray. (2020). Fortran code for modeling the propagation of ULF waves in a 3-dimensional dipole magnetosphere. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/d1g7-c676
Using mecanum wheel in moving cargo
No full textSkrypnyk N. Using mecanum wheel in moving cargo / N. Skrypnyk, I. Lysak // Тиждень науки-2023. Електротехнічний факультет. Тези доповідей науково-технічної конференції, Запоріжжя, 24-28 квітня 2023 р. / Редкол. : В. Шаломєєв (відпов. ред.) Електрон. дані. – Запоріжжя : НУ «Запорізька політехніка», 2023. – С. 433-435
Reply to comment by R. L. Lysak on “Improved basis set for low frequency plasma waves”
Get PDFIn a Comment, R. L. Lysak argues against the validity of Bellan (2012) on the grounds that this paper uses fluid rather than kinetic theory. The Comment invokes a commonly used method for reducing the 3×3 wave equation matrix to a 2×2 matrix which then gives approximate dispersion relations. In this Response, it is shown that the same 3×3 wave equation matrix can be obtained from fluid theory and certain mathematical inconsistencies in the method of analysis used in the Comment are identified. It is shown that the dispersion relation derived in Bellan (2012) provides a much better description of the experimental observations reported by Kletzing et al. (2003) than does the dispersion relation proposed in the Comment and in Lysak and Lotko (1996)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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