19,294 research outputs found
Gu Xiong : The River
No full textGu Xiong’s installation “The River” is described by O’Brian as a meditation on migrancy and displacement. The author situates the work within the life of the artist, who left China because of political oppression, and the history of the Canadian West, which has marginalized its Chinese inhabitants. Short poetic texts by Gu Xiong in which he identifies with spawning salmon are included. Biographical notes. 19 bibl. ref
Osteoinductive bone substitutes
No full textWismeyer, D. [Promotor]Gu, Z. [Promotor]Liu, Y. [Copromotor
Noworodek z trzepotaniem przedsionków
No full textTrzepotanie przedsionków jest nawrotną tachyarytmią nadkomorową, która w populacji pediatrycznej występuje
głównie u dzieci z wrodzoną wadą serca. Może pojawić się również u pacjentów ze zdrowym morfologicznie
sercem, szczególnie u noworodków – wówczas rozpoznanie ustalane jest zazwyczaj już w okresie prenatalnym.
Przebieg kliniczny zależy od częstotliwości pracy komór; możliwa jest szybko postępująca niewydolność serca.
Opracowanie zawiera dane epidemiologiczne, obraz kliniczny oraz postępowanie diagnostyczno-terapeutyczne
w trzepotaniu przedsionków w okresie płodowym i u noworodków. W celu szybkiego przywrócenia rytmu zatoko‑
wego u noworodków skutecznym postępowaniem jest kardiowersja elektryczna. W profilaktyce nawrotów arytmii
stosuje się leki antyarytmiczne, czasem w skojarzonej, wielolekowej terapii. W pracy prezentujemy noworodka
z morfologicznie zdrowym sercem, z opornym na leczenie, nawracającym trzepotaniem przedsionków. W przebie‑
gu arytmii obserwowano upośledzenie przewodzenia przedsionkowo-komorowego, skutkujące zwolnieniem rytmu
komór i objawami niewydolności serca. W okresie noworodkowym czterokrotnie nawróciło trzepotanie przedsion‑
ków – dziecko trzykrotnie wymagało kardiowersji elektrycznej. W profilaktyce arytmii zastosowano trzylekową far‑
makoterapię
Verification of Nonblockingness in Bounded Petri Nets With a Semi-Structural Approach
No full textIn this paper, we propose a basis marking method- based semi-structural approach to verify nonblockingness of a Petri net. By solving a set of integer linear programming problems, the unobstructiveness of a basis reachability graph, which is a necessary condition for nonblockingness, is determined. We propose an algorithm to expand the basis reachability graph and show that a bounded Petri net is nonblocking if and only if its expanded basis reachability graph is unobstructed. The main advantages of this method are that it does not require to enumerate all the reachable markings and has wide applicability
Non-Blockingness Verification of Bounded Petri Nets Using Basis Reachability Graphs
No full textIn this letter, we study the problem of non-blockingness verification by tapping into the basis reachability graph (BRG). Non-blockingness is a property that ensures that all pre-specified tasks can be completed, which is a mandatory requirement during the system design stage. We develop a condition of transition partition of a given net such that the corresponding conflict-increase BRG contains sufficient information on verifying non-blockingness of its corresponding Petri net. Thanks to the compactness of the BRG, our approach possesses practical efficiency since the exhaustive enumeration of the state space can be avoided. In particular, our method does not require that the net is deadlock-free
Gu Kuang and his nature lyrics
No full textSmyslem mé práce bude představit básníka Gu Kuanga žijícího v období panování dynastie Tang. Stručně nastíním Gu Kuangův život a dále hlouběji rozeberu jeho básnickou tvorbu. Z Gu Kuangových dochovaných básní se zaměřím na přírodní lyriku. Ve dvou kapitolách pomocí příkladů Gu Kuangovy přírodní lyriky poukážu na hlavní, a sice ideové vlivy buddhismu a taoismu na jeho básnickou tvorbu. V podkapitolách se pro lepší představu v pokusím načrtnout rozdílný projev těchto vlivů u Gu Kuanga a jeho součastníka Wang Weie (699 -760). Práce bude obsahovat přehled témat a forem v Gu Kuangově tvorbě a pokusím se poukázat na autorovo místo v linii básníků v období přerodu éry Vrcholné Tang v éru Střední Tang. Jako vodítko mi bude sloužit článek Zhou Mingxiu "Gu Kuang: zai Li bai yu Li He zhijian, jehož závěry nastíním a na základě četby Gu Kuangova díla s některými budu polemizovat. To pomůže zařadit Gu Kuanga tvořícího v přelomovém období do kontextu probíhajících změn ve směřování čínského básnictví. Nakonec se pokusím dotknout se stručně jazyka, především lexikální náplni Gu Kuangovy přírodní lyriky a zmíním také spolu s ukázkami z básní specifikum vnímajícího subjektu v Gu Kuangově přírodní lyrice. V příloze uvádím překlady dalších vybraných Guových básní a přebásnění vybraných čtyřverší, kde jsem se snažila co..
Analysis of Behavioural Properties of Bounded Petri Nets With a Semi-Structural Approach
No full textIn this paper, we propose a semi-structural approach to verify some behavioural properties of bounded Petri nets, including home state existence, reversibility, liveness, and deadlock-freeness. An abstracted representation of the state space of Petri nets, called minimax basis reachability graph (minimax-BRG), is employed. We show how the verification of the above-mentioned properties for a bounded Petri net can be carried out testing equivalent properties of its corresponding minimax-BRG. Being the minimax-BRGs an abstracted representation of the reachability graph, the exhaustive enumeration of the state space can be avoided and we show, via numerical simulations, that this approach achieves significant practical efficiency
Deng Erya jiu cang jia gu.
No full text李宗焜拓摹并題."鄧爾雅(一八八四-一九五四)舊藏甲骨. 一九六九年五月鄧祖玄奉母葉多福女士之命以其父爾雅先生所藏甲骨慨贈香港中文大學聯合書院. 二〇一五年夏移藏大學圖書館""乙未仲冬余應香港中文大學圖書館李露絲館長之邀為館藏甲骨之儲存與展示貢愚余以坐言不如起行遂為之董理重為類次並施拓摹携歸裱冊而還之且識數語以記因緣李宗焜於史語所""Deng Erya (yi ba ba si - yi jiu wu si) jiu cang jia gu. Yi jiu liu jiu nian wu yue Deng Zuxuan feng mu Ye Duofu nü shi zhi ming yi qi fu Erya xian sheng suo cang jia gu kai zeng Xianggang Zhong wen da xue Lian he shu yuan. Er ling yi wu nian xia yi cang Da xue tu shu guan""Yi wei zhong dong yu ying Xianggang Zhong wen da xue tu shu guan Li Lusi guan zhang zhi yue wei guan cang jia gu zhi chu cun yu zhan shi gong yu yu yi zuo yan bu ru qi xing sui wei zhi dong li chong wei lei ci bing shi tuo mo xie gui biao ce er huan zhi qie shi shu yu yi ji yin yuan Li Zongkun yu Shi yu suo"In accordion binding.Li Zongkun tuo mo bing ti
On Z-compactifiability of manifolds
No full textIn 1976, Chapman and Siebenmann \cite{CS76} established necessary and
sufficient conditions for -compactifying Hilbert cube manifolds.
While these conditions are known to be necessary for a manifold to admit
a -compactification, it remains an open question whether these
conditions are also sufficient. Guilbault and the author \cite[Thm. 1.2]{GG20}
proved that these conditions are sufficient for the product
to be -compactifiable. We further explore this topic
by introducing additional conditions such that a -compactification
of indeed implies a -compactification of
, thus partially resolving the open question. As applications, it is shown
that there exist infinitely many non-pseudo-collarable 4-manifolds which are
-compactifiable; however, pseudo-collarable manifolds with compact
boundary of dimension at least six are -compactifiable.
Furthermore, we investigate the connection between
-compactifiability with the topological rigidity of aspherical
manifolds. We also construct a noncompact one-sided -cobordism
satisfying controlled Mather-Thurston theorems, where is
-compactifiable, whereas may not be.Comment: 36 pages, 12 figures. Theorem 1.3 is weaker than the original version
due to an error. Section 3 has been revised to accommodate this change. Some
text has been modified to enhance readability, and 6 new figures have been
adde
Tennantite-(Ni), Cu 6 (Cu 4 Ni 2)As 4 S 13, from Luobusa ophiolite, Tibet, China: A new Ni member of the tetrahedrite group
No full textThe new mineral tennantite-(Ni), Cu6(Cu4Ni2)As4S13, has been discovered from the Luobusa Chromitite, Tibet, southwestern China. Tennantite-(Ni) occurs as anhedral grains ranging from 2 to 20 m in size. In reflected light microscopy, tennantite-(Ni) is isotropic and appears yellow-greenish grey. Reflectance data for Commission on Ore Mineralogy wavelengths in air for tennantite-(Ni) are: 31.0 (470 nm), 29.6 (546 nm), 29.6 (589 nm) and 29.3 (650 nm). Electron microprobe analysis for holotype material gave the empirical formula (on basis of total cations = 16 apfu): M(2)Cu6 M(1)[Cu4.00(Ni0.97Cu0.53Fe0.50)Σ2.00]Σ6.00X(3)(As2.94Sb1.06)Σ4S12.77. Tennantite-(Ni) is cubic, with space group I3m (#217), a =10.2957(9) Å, V = 1091.4(3) Å3 and Z = 2. By using single-crystal X-ray diffraction, the crystal structure has been determined and refined to a final R1 = 0.0423 on the basis of 163 independent reflections [Fo > 4σ (Fo)]. The calculated seven strongest powder X-ray diffraction lines [d in Å (I..
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