59,356 research outputs found

    A micro ultrasonic motor using a micro-machined cylindrical bulk PZT transducer

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    In this paper, a micro ultrasonic motor using a micro-machined bulk piezoelectric transducer is introduced. The cylindrical shaped bulk piezoelectric transducer, a diameter of 0.8 mm and a height of 2.2 mm, was developed as stator transducer for traveling wave type ultrasonic motor. The transducer was made of lead zirconate titanate (PZT) bulk ceramics, and formed by micro machining, Ni plating and laser beam cutting process. Using this stator transducer, we have fabricated a cylindrical micro ultrasonic motor, a diameter of 2.0 mm and a height of 5.9 mm. We have also evaluated some characteristics and succeeded in driving the micro ultrasonic motor.</p

    Frog went a-courting and he did ride, mm-hmm

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    voiceCollected by Mary Celestia Parler Transcribed by Nathaniel Lucy Sung by Kay Thresto Fayettville, Arkansas September 14, 1959 Reel 316, Item 12 [This recording can be found in better quality under Reel 325, Item 6] Froggie Went a-Courting Kay Thresto: I used to stay with my grandmother and she sang to me all the time. And I remember more of what she sang but she died when I was five and so I just remember little snatches of things. And I remember part of “Froggie Went a-Courting” and I remember it had lots and lots of verses about the wedding guests but I don’t’ remember. Well let’s see, I remember the first- Frog went a-courting and he did ride, mm-hmm Frog went a-courting and he did ride Sword and pistol by his side, mm-hmm He rode up to Miss Mousie’s hall, mm-hmm He rode up to Miss Mousie’s hall Gave a loud knock and gave a loud call, mm-hmm Lady Mouse came trippin’ down, mm-hmm Lady Mouse came trippin’ down Green grass slippers and a silver gown, mm-hmm Froggie fell down at Mousie’s knee, mm-hmm Froggie fell down at Mousie’s knee Pray little mouse will you marry me? mm-hmm Not without Uncle Rat’s consent, mm-hmm Not without Uncle Rat’s consent Would I marry the President, mm-hmm Uncle Rat he laughed til he cried, mm-hmm Uncle Rat he laughed til he cried To think his niece would be a bride, mm-hmm Where will the wedding supper be? mm-hmm Where will the wedding supper be? Way down yonder in hallow tree, mm-hmm What will the wedding supper be? mm-hmm What will the wedding supper be?Catnap broth and dogwood tea, mm-hmm KT: And then the wedding, I just remember a little about- First come in was Uncle Rat, mm-hmm First come in was Uncle Rat In some kind of coat and a stovepipe hat, mm-hmm KT: -and then a whole bunch of guests and then something at the end all I can remember is- Frog came swimming o’er the lake, mm-hmm Frog came swimming o’er the lake There he was swallowed by a big black snake, mm-hmm Lady Mouse she cried and cried, mm-hmm Lady Mouse she cried and cried Thought to myself she would have died, mm-hmm So that was the end of one, two, three, mm-hmm That was the end of one, two, three The frog and the rat and the little Mousie, mm-hmmFunding for digitization provided by the Arkansas Humanities Council and the Happy Hollow Foundation

    Ailin He's MM Piano Recital 2

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    7. Piano Sonata in D minor(“Tempest”), Op. 31 no.2 Ludwig van Beethoven I. Largo II. Allegro III. Allegretto 8. Impromptus in C minor, Op.90 No.1 Franz Schubert 9. A Little Suite For Christmas, A.D. 1979 George Crumb The Visitation Berceuse for the Infant Jesu The Shepherd’s Noel Adoration of the Magi Nativity Dance Canticle of the Holy Night Carol of the BellsRelated performance for this degree -- Ailin He's MM Piano Recital 1: http://hdl.handle.net/2346/73496Recital recordings are archival copies for educational purposes only. Members of the TTU community may request to listen/view them for educational purposes via the PDF link to the left

    Ailin He's MM Piano Recital 1

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    Sonata in D Major for Piano Four-Hands, K. 381/123a by W. A. Mozart The Years of Spring by Amy Beach Ah, Love, But a Day! by Amy Beach I Love China by Quifeng Zheng Scherzo, Aria, and Fugato by Kent Kennan Concerto in A Minor, Op. 16 by Edvard GriegRelated performance for this degree -- Ailin He's MM Piano Recital 2: https://hdl.handle.net/2346/98814Recital recordings are archival copies for educational purposes only. Members of the TTU community may request to listen/view them for educational purposes via the PDF link to the left

    Recent Results From the EU POF-PLUS Project: Multi-Gigabit Transmission Over 1 mm Core Diameter Plastic Optical Fibers

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    Recent activity to achieve multi-gigabit transmission over 1 mm core diameter graded-index and step-index plastic optical fibers for distances up to 50 meters is reported in this paper. By employing a simple intensity-modulated direct-detection system with pulse amplitude or digital multi-tone modulation techniques, low-cost transceivers and easy to install large-core POFs, it is demonstrated that multi-gigabit transmission up to 10 Gbit/s over 1-mm core diameter POF infrastructure is feasible. The results presented in this paper were obtained in the EU FP7 POF-PLUS project, which focused on applications in different scenarios, such as in next-generation in-building residential networks and in datacom applications

    Gas volume fraction and velocity profiles: vertical and inclined bubbly air-water flows

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    Upward inclined gas-liquid flows are frequently encountered in the oil industry and data relating to the local gas volume fraction distribution and the local gas velocity distribution is important, for example, in pressure gradient prediction and in modeling oil well 'blowouts'. In this paper measurements are presented of the local gas volume fraction distribution and the local axial gas velocity distribution which were taken in bubbly air-water flows in an 80 mm diameter pipe which was inclined at angles of 0°, 15° and 30° to the vertical. Qualitative arguments are presented to explain the influence of the liquid superficial velocity on the local gas volume fraction distribution in inclined flow and also to explain the very high axial gas velocities observed towards the upper side of the inclined pipe

    Related Data for: LED quality impacts on plant growth and photosynthetic light use efficiency of halophyte vegetable Mesembryanthemum crystallinum grown under two saline conditions

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    There is very little study on the effects of LED quality on Mesembryanthemum crystallinum grown under different salinities. In this study, M. crystallinum was grown under red/blue (R/B) LED ratios of 0.9, 1.6. 2.0 and 2.8 with 100 and 500 mM NaCl and exposed to the same level of photosynthetic photon flux density, PPFD (290 µmol m‑2 s‑1, 12 h photoperiod). Fourteen days after transplanting, plants with 100 mM NaCl had significantly higher values of growth parameters including shoot and root fresh weight, total leaf area and specific leaf area than with 500 mM NaCl. Grown with 100 mM NaCl under R/B 0.9, M. crystallinum had significantly lower shoot FW and total leaf area than under other R/B ratios. However, LED quality did not seem to affect the growth parameters of M. crystallinum grown with 500 mM NaCl. All plants had similar higher leaf succulence and water content but lower leaf dry matter content with 100 mM NaCl than with 500 mM NaCl. Crassulacean acid metabolism (CAM) acidity of plants grown with 500 mM NaCl was about 4-fold higher than with 100 mM NaCl, indicating induction and stimulation of CAM photosynthesis. Chlorophyll fluorescence Fv/Fm ratios were greater than 0.8 for all plants, suggesting that maximum efficiency of PSII was unaffected by LED quality and salinity. M. crystallinum grown with 500 mM NaCl had lower electron transport rate, ETR but higher non-photochemical quenching, NPQ than with 100 mM NaCl, implying that photosynthetic light use efficiency was affected when switching C3 to CAM photosynthesis under high salt stress. M. crystallinum grown with100 mM NaCl had higher photochemical quenching, qP and ETR under R/B 0.9 than under R/B 2.8 and all plants with 500 mM NaCl. In conclusion, LED quality had different impacts on photosynthetic light-use efficiency of M. crystallinum grown under different salinities and thus resulting in different growth and productivity

    Fiber design for high-power low-cost Yb:Al-doped fiber laser operating at 980nm

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    We investigated an Yb:Al-doped depressed-clad hollow optical fiber (DCHOF) for cladding-pumped 980nm laser operation. With a careful design, the nonzero fundamental-mode cutoff characteristics of a DCHOF allows the competing 1030-1060nm emission to be filtered out, despite being quite close to 980nm. The laser yielded over 3W of output power in a diffraction limited beam (M -parameter degrades to 2.7, as a result of increased cladding-mode lasing, as the cladding thickness is reduced

    Metiochodes minor Li, He & Liu 2010

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    Metiochodes minor Li, He & Liu, 2010 Figs. 2D, 3D, 4D, 5D, 6D, 7D Metiochodes minor Li et al. 2010; He 2018. Material examined. 1 male, CHINA, Fujiang Prov., Sanming, Mingxi, Longkeng, 8-viii-2008, coll. He Zhu-Qing; 2 females, CHINA, Zhejiang Prov., Tianmushan, 17-viii-2018, coll. He Zhu-Qing; 3 males, CHINA, Zhejiang Prov., Tianmushan, 11-viii-2019, coll. He Zhu-Qing; 1 male, CHINA, Zhejiang Prov., Tianmushan, 6-ix-2019, coll. He Zhu-Qing. Measurements (in mm). Male: SZ 9.75–9.79, PR 0.70–0.78, HF 4.10–4.23; females: SZ 10.19–11.81, PR 0.75–0.85, HF 4.55–4.82, OV 3.27–3.58. Distribution. China (Fujian, Zhejiang).Published as part of Li, Shi-Yu, Liu, Yi-Jiao & He, Zhu-Qing, 2022, New and little-known mute Trigonidiinae species from China (Orthoptera: Grylloidea: Trigonidiidae), pp. 210-220 in Zootaxa 5115 (2) on page 214, DOI: 10.11646/zootaxa.5115.2.2, http://zenodo.org/record/635226
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