49,115 research outputs found

    Tydi-lang: a language for typed streaming hardware: A manual for future Tydi-lang compiler developers

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    Transferring composite data structures with variable-length fields often requires designing non-trivial protocols that are not compatible between hardware designs. When each project designs its own data format and protocols the ability to collaborate between hardware developers is diminished, which is an issue especially in the open-source community. Because the high-level meaning of a protocol is often lost in translation to low-level languages when a custom protocol needs to be designed, extra documentation is required, the interpretation of which introduces new opportunities for errors. The Tydi specification (Tydi-spec) was proposed to address the above issues by codifying the composite and variable-length data structures in a type and providing a standard protocol to transfer typed data among hardware components. The Tydi intermediate representation (Tydi-IR) extends the Tydi-spec by defining typed interfaces, typed components, and connections among typed components.In this paper, we propose Tydi-lang, a high-level hardware description language (HDL) for streaming designs. The language incorporates Tydi-spec to describe typed streams and provides templates to describe abstract reusable components. We also implement an open-source compiler from Tydi-lang to Tydi-IR. We leverage a Tydi-IR to VHDL compiler, and also present a simulator blueprint to identify streaming bottlenecks. We show several Tydi-lang examples to translate high-level SQL to VHDL to demonstrate that Tydi-lang can efficiently raise the level of abstraction and reduce design effort.https://github.com/twoentartian/tydi-lang Source code for the thesis project.Computer Scienc

    Del Lang

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    Photograph - Del Lang and his dog by a truck, Athabasca, Albert

    Del Lang - 02

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    Photograph - Del Lang tending a gas well, Athabasca, Albert

    Lang, S B, 417268

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    This record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/398239Surname: LANG. Given Name(s) or Initials: S B. Military Service Number or Last Known Location: 417268. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 57370.215508 Item: [2016.0049.30532] "Lang, S B, 417268

    John B. Lang behind bars

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    Photograph shows John B. Lang standing behind bars at the Bexar County Jail after being arrested as suspect in burglary of 14 local residences

    Aulocera pygmaea subsp. vadimi Lang 2019

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    <i>Aulocera pygmaea vadimi</i> Lang, 2019 <p>(Figs. 3, 4, 17, 29 b, 30 b, 31 e)</p> <p> <i>Aulocera atunsensis</i> [sic] <i>vadimi</i> Lang, 2019: 148, figs. 8, 9, 30, 31, 36. TL: Huangtu-liang Pass, Pingwu, Sichuan.</p> <p> <i>Aulocera pygmaea vadimi</i>: Lang, 2021: 23, figs. 15–17; Lang, 2022: 121, pl. XI: 15–19.</p> <p> <i>Aulocera s.</i> [sic] <i>vadimi</i>: H. Huang, 2021: 354.</p> <p> <i>Aulocera atuntsensis vadimi</i>: H. Huang, 2021: 354.</p> <p> <b>Material examined.</b> Holotype: ♂, Holotype of <i>Aulocera atunsensis</i> [sic] <i>vadimi</i> Lang, China: Sichuan, Pingwu, Huangtu-liang Pass, 3300 m, 30.VII.2018, leg. S. Y. Lang (CQMNH); paratypes: 5 ♂♂ 4 ♀♀, Paratypes of <i>Aulocera atunsensis</i> [sic] <i>vadimi</i> Lang, same collecting data (LSY).</p> <p> <b>Diagnosis.</b> This subspecies can be separated from the nominate one by the combination of the following characters: 1) on the forewing upperside the male brand is less prominent than that in the nominate subspecies; 2) the hindwing white discal band in spaces 1b to 3 on both sides is somewhat curved, whereas it is nearly straight in the nominate subspecies; 3) the upper half of the lamina of the androconium (Fig. 31e) is wider than in the nominate subspecies (Fig. 31f). The differential diagnosis with <i>Aulocera longanfua</i> is given in the diagnosis section of the latter, below.</p> <p> <b>Remarks.</b> Although the type localites of <i>Aulocera pygmaea vadimi</i> and the nominate subspecies are not far away from each other, their habitats are two isolated summits which means gene flow between the two populations is unlikely. Considering the morphological differences between the two taxa, this subspecies is retained as valid.</p> <p> <b>Distribution.</b> China (N. Sichuan).</p>Published as part of <i>Lang, Song-Yun & Huang, Si-Yao, 2023, Notes on Aulocera pygmaea (Holik, 1949) and its related taxa (Lepidoptera, Nymphalidae, Satyrinae), pp. 555-572 in Zootaxa 5357 (4)</i> on pages 557-558, DOI: 10.11646/zootaxa.5357.4.4, <a href="http://zenodo.org/record/10064792">http://zenodo.org/record/10064792</a&gt

    Aulocera longanfua Lang 2021

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    <i>Aulocera longanfua</i> Lang, 2021 <p>(Figs. 7, 8, 20, 29 d, 30 d, 31 d)</p> <p> <i>Aulocera pygmaea</i>: Lang (<i>nec</i> Holik), 2019: 149, figs. 28, 29.</p> <p> <i>Aulocera longanfua</i> Lang, 2021: 24, figs. 10–14. TL: Huangtu-liang Pass, Pingwu, Sichuan; H. Huang, 2021: 354; Lang, 2022: 120, pl. XI: 10–12.</p> <p> <b>Material examined.</b> Holotype: ♂, Holotype of <i>Aulocera longanfua</i> Lang, China: Sichuan, Pingwu, Huangtu-liang Pass, 3300 m, 30.VII.2018, leg. S. Y. Lang (CQMNH); paratypes: 3 ♂♂ 1 ♀, Paratypes of <i>Aulocera longanfua</i> Lang, same collecting data, leg. S. Y. Lang & J. Hou (LSY).</p> <p> <b>Diagnosis.</b> <i>Aulocera longanfua</i> can be separated from the related <i>A. sybillina</i> by the combination of the following characters: 1) in the male, on the forewing underside, the white postdiscal spots are much smaller; 2) on the forewing upperside, the male brand is narrower and situated further separated from the white postdiscal spots in the spaces 1b, 2 and 3, whereas it is broader and nearly attached to the white spots in <i>A. sybillina</i>; 3) in the female, on the hindwing upperside, the white discal band is much narrower; 4) the lamina of the androconium (Fig. 31d) is obviously slenderer than those of <i>A. sybillina</i> (Figs. 31a–c); 5) in the male genitalia, the valva (Fig. 30d) is shorter and narrower than that of <i>A. sybillina</i> (Figs. 30e–h).</p> <p> <i>Aulocera longanfua</i> is also very similar to the nominate subspecies of <i>A. pygmaea</i> but can be distinguished from it by the combination of the following characters: 1) in the female, the white discal spots on both sides are smaller; 2) on the hindwing upperside, the white discal band is discrete in the spaces 1, 2 and 3, whereas it is more continuous in <i>A. pygmaea</i>; 3) on the hindwing, the white discal band in the spaces 1b to 3 is curved on both sides, whereas it is nearly straight in <i>A. pygmaea</i>; 4) the base of the lamina of the androconium (Fig. 31d) is wider and the distal stalk is somewhat longer, whereas it is gradually narrowing towards the basal stalk in <i>A. pygmaea</i> (Fig. 31f); 5) in the male genitalia, the subdistal section of the valva (Fig. 30d) is somewhat narrower than that of <i>A. pygmaea</i> (Fig. 30a). From the sympatric <i>A. pygmaea vadimi</i>, it can be distinguished by further characters in addition to those mentioned above: 1) in the male, on the forewing upperside, the brand is present, whereas it is absent or vestigial in <i>A. pygmaea vadimi</i>; 2) on the forewing upperside, the discal spots are usually larger; 3) in the female, on the forewing upperside, the discal spots are smaller.</p> <p> <b>Remarks.</b> Sakai <i>et al.</i> (2001) mentioned a record of <i>Aulocera sybillina</i> with the data as “Pingwu (Pingwu-Jiuzhaigou) (3,300 m), Sungqu (Songpan County), 16.VIII.1987 ” without any further comment. Although the information seems vague, the site “Pingwu-Jiuzhaigou, 3,300 m ” is clearly the same as Huangtu-liang Pass which is of the same altitude and is the type locality of <i>A. longanfua</i> and <i>A. pygmaea vadimi</i>. However, the collecting date is half a month later than that of <i>A. longanfua</i> and <i>A. pygmaea vadimi</i>. Since Sakai <i>et al</i>. (2001) did not illustrate any specimen with the above information, it is not known whether this record is the true <i>sybillina</i> or just a <i>longanfua</i>.</p> <p> <b>Distribution.</b> China (N. Sichuan).</p>Published as part of <i>Lang, Song-Yun & Huang, Si-Yao, 2023, Notes on Aulocera pygmaea (Holik, 1949) and its related taxa (Lepidoptera, Nymphalidae, Satyrinae), pp. 555-572 in Zootaxa 5357 (4)</i> on pages 566-570, DOI: 10.11646/zootaxa.5357.4.4, <a href="http://zenodo.org/record/10064792">http://zenodo.org/record/10064792</a&gt

    Sanford Bates Correspondence from Allen B. Lang

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    A letter addressed from Allen B. Lang concerning Hornblower & Weeks-Hemphill, Noyes, a brokerage and investment banking firm

    Nyon anyona

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    English translation of title: 'Walk proudly'Town dance folk song by Lang Obiero and Luo men, with 4 guitars and accompanied by a rattleThis recording is held at the International Library of African Music. For further information contact [email protected] recording was digitised by the International Library of African MusicOriginal format: 15ips reelEquipment used in digitisation: Studer B 67 Tape Recorder; Nagra IIISoftware: Sound Forge V.6Sample rate: 44100Hz 16Bit Stere
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