نتایج جستجو برای: artificial disc

تعداد نتایج: 331847  

2008
David Durand

W e are exploring what it means to 'play' textual literature. We don't mean, by this, playing games that incorporate textual material within their structure but rather textual and literary structures for which play is a primary means of interaction. We are conducting our exploration both as creators and scholars of digital media. This paper discusses a number of related issues — including the n...

2007
Seiji ISOTANI Riichiro MIZOGUCHI

Although artificial intelligence has been successfully introduced to enhance Education through technologies in the past few years, major challenges still remain. One of them is how to represent the “knowledge” of intelligent authoring systems. To represent the knowledge of authoring systems to support collaborative learning is particularly challenging because it is based on various learning the...

Journal: :Dalton transactions 2011
Nicole Megger Lorena Welte Félix Zamora Jens Müller

The incorporation of an artificial 5-methyl-2,2'-bipyridine nucleoside at the 5' terminus of an otherwise self-complementary oligonucleotide sequence opens up the opportunity of metal-mediated aggregation of DNA double helices triggered by the addition of the respective metal ions. Interestingly, two-dimensional aggregates (DNA monolayers) are formed in the presence of nickel(ii), whereas coppe...

Journal: :acta medica iranica 0
mahmoud reza khalatbari department of neurosurgery, hazrat rasool general hospital, iran university of medical science and health service, tehran, iran. seyed taha yahyavi medical researcher, iran university of medical science and health service, tehran, iran. hamid borghei- razavi medical researcher, iran university of medical science and health service, tehran, iran. hosein ghalaenovi department of neurosurgery, hazrat rasool general hospital, iran university of medical science and health service, tehran, iran.

a woman presenting with severe right lower quadrant (rlq) abdominal pain is presented here. she was evaluated for all usual cause of such pain. laboratory tests and abdominal and pelvic sonography was normal. mri revealed l1-l2 disc herniation.

Journal: :Turkish neurosurgery 2016
Georgios K Matis Olga I Chrysou Danilo Silva Michail A Karanikas Gerasimos Baltsavias Nikolaos Lyratzopoulos Spyridon Baroutas Theodossios A Birbilis

AIM To identify key determinants of lumbar disc herniation (LDH) patients' satisfaction and to evaluate the efficiency of an artificial neural network (ANN) model to prognosticate satisfaction derived from the hospital stay in this specific patient group. MATERIAL AND METHODS A single item question was used to assess patient satisfaction. Principal component analysis evaluated several aspects...

1999
Toshiaki Kaneeda Masahiro Utsumi

Oxidative degradation of ultra-high molecular weight polyethylene (UHMWPE; PE), due to gamma irradiation sterilization in air, increases wear rate in artificial joint. Not only adhesive and abrasive wear but also delamination (flaking), a typical wear of the PE component in artificial knee joint, and fracture could be observed. This paper deals with gamma-irradiation effects on severe wear mech...

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