1,767,814 research outputs found
The Dk project: an interlaboratory comparison of Dk/L measurements
No full textThe oxygen transmissibilities (Dk/L) of a set of 48 contact lenses made from 8 different materials were measured by 4 laboratories. The L/Dk measurements from each laboratory were compared and correlated. Samples which were not masked with a fixed front surface aperture during measurement were corrected for edge effects. This paper shows that provided L/Dk is calculated for each lens using the same technique and Dk is derived using a graphical method of calculation, similar results can be obtained by all laboratories. However, the agreement was less good for materials of Dk greater than 70 x 10(-11) (cm2/s) (ml O2/ml x mm Hg)
dK-Personalization: Publishing Network Statistics with Personalized Differential Privacy
No full textdK-Personalization: Publishing Network Statistics with Personalized Differential Privac
1 Jahr dk-blog – ein Rückblick
No full textIm Dezember 2012, also vor einem Jahr, nahm der dk-blog konkrete Formen an, so daß ich zum neuen Jahr mit dem wissenschaftlichen Bloggen richtig loslegen konnte. Mittlerweile neigt sich auch das Jahr 2013 dem Ende zu – Anlaß genug, um einmal innezuhalten und zu reflektieren, wie sich das Format in den vergangenen Monaten entwickelt hat. Nach meinem eigenen Eindruck verging die Zeit sehr schnell, und auch der allwöchentliche blogpost war schnell geschrieben; immer noch sind Themen endlos vorha..
DK conjecture for Grassmannian flips
No full textPh.D.We investigate the DK conjecture on derived categories of coherent sheaves stated by Bondal-Orlov and Kawamata: there should be a derived embedding for any flip and in particular a derived equivalence for any flop. Unlike the situations for flops, there are few examples of flips proven to satisfy the DK conjecture except for some toroidal flips.We construct new examples of flips from Grassmannians, called Grassmannian flips, that satisfy the DK conjecture.我們對由彭督-奧爾洛夫（Bondal-Orlov）和川又（Kawamata）提出關於凝聚層的導出範疇相關的DK猜測進行探討：即對於任何翻轉（flip），都應該有導出（範疇的）嵌入，尤其是對於任何平轉 （flop），都應該有導出（範疇的）等價。與平轉（flop）的情況不同，除了一些環形翻轉（toroidal flips） 之外，鮮有反轉的例子證明能夠被證明滿足DK猜想。我們從格拉斯曼簇出發構造了滿足DK猜想的新例子，稱為格拉斯曼翻轉（Grassmannian flips）。Xie, Ying.Thesis Ph.D. Chinese University of Hong Kong 2020.Includes bibliographical references (leaves 84-88).Abstracts also in Chinese.Title from PDF title page (viewed on February 7, 2022)
The ocular response to extended wear of a high Dk silicone hydrogel contact lens
No full textPurpose: A four-month extended wear clinical trial was conducted to compare the ocular\ud
effects of a high Dk Balafilcon A silicone hydrogel lens and a low Dk HEMA 38.6 per\ud
cent H20 soft lens.\ud
Method: Twenty-four subjects who were adapted to daily wear of soft lenses wore a high\ud
Dk lens in one eye and a low Dk HEMA lens in the other eye for four months on an\ud
extended wear basis after one week of daily wear. Thirteen progress evaluations were\ud
conducted using standard clinical procedures.\ud
Results: Eighteen subjects (75 per cent) completed the study. The high Dk lens induced\ud
significantly less bulbar and limbal injection and corneal vascularisation than the low\ud
Dk HEMA lens (p < 0.05). Epithelial microcysts were observed only in the eyes wearing\ud
the low Dk lens. A significant increase in myopia was found in the eyes wearing the low\ud
Dk HEMA lens (mean = 0.50 D, p < 0.01) compared to the insignificant myopic increase\ud
of 0.06 D in the eyes wearing the high Dk lens. Three subjects developed small infiltrates in the high Dk lens wearing eyes and significantly more post-lens debris was observed under the high Dk lens. Six subjects developed papillary conjunctivitis in the eye wearing silicone hydrogel lenses but only two of those were discontinued from the study.\ud
Conclusion: No hypoxia-related effects were observed with extended wear of the high\ud
Dk Balafilcon A silicone hydrogel lens
DK–Dunántúli karbonátos triász rétegsorok természetes Gamma-szelvényének szekvenciasztratigráfiai értékelése
Full text linkA munkában két cél vezérelt. Az első, hogy megvizsgáljam a DK-dunántúli középső-triász karbonátos rétegsorok természetes gamma potenciáljának szekvenciasztratigráfiai értelmezési lehetőségét, alkalmazhatóságát. Második cél, ha az első sikeresnek bizonyul, és párhuzamosítani lehet a vizsgált fúrások rétegsorát, esetleg eredményekkel szolgálhatok a Mecsek, és a Villányi-hegység középső-triász fejlődéstörténetének pontosításához és a távolabbi területekkel való pontosabb korrelációhoz
DÄNEMARK (.dk)
No full textAn analysis of the regulation of the .dk top level domain and of the jurisprudence relation to .dk domain name dispute
Dk hugbúnaður - Mínar síður
No full text„Mínar síður“ er lokaverkefni grunnáms okkar sem hópinn skipa. Verkefnið er unnið í samstarfi við dk hugbúnað ehf og er afurð þess vefsíðan Mínar síður, sem er innri vefur viðskiptavina dk. Vefsíðan gerir viðskiptavinum dk kleift að skoða og nálgast reikninga, hreyfingar, samninga og skilaboð, sem þeim tengjast, á einfaldan og fljótlegan máta. Mikil áhersla er lögð á notagildi, þar sem helstu markmið verkefnisins eru að vefsíðan sé notendavæn og bjóði upp á virðisaukandi þjónustu fyrir viðskiptavini dk
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Dk hugbúnaður - Mínar síður
No full text„Mínar síður“ er lokaverkefni grunnáms okkar sem hópinn skipa. Verkefnið er unnið í samstarfi við dk hugbúnað ehf og er afurð þess vefsíðan Mínar síður, sem er innri vefur viðskiptavina dk. Vefsíðan gerir viðskiptavinum dk kleift að skoða og nálgast reikninga, hreyfingar, samninga og skilaboð, sem þeim tengjast, á einfaldan og fljótlegan máta. Mikil áhersla er lögð á notagildi, þar sem helstu markmið verkefnisins eru að vefsíðan sé notendavæn og bjóði upp á virðisaukandi þjónustu fyrir viðskiptavini dk
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