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José Miguel Campos,Ana Catarina Sousa,Pedro Olivério Pinto,Jorge Ribeiro,Miguel Lacueva França,Ana Rita Caseiro,Mariana Vieira Branquinho,Sílvia Santos Pedrosa,Carla Mendonça,Ana Brandão,José Domingos 한국생체재료학회 2019 생체재료학회지 Vol.23 No.1
Autologous bone remains the gold standard grafting substrate for bone fusions used for small gaps and critical defects. However, significant morbidity is associated with the harvesting of autologous bone grafts and, for that reason, alternative bone graft substitutes have been developed. In the present case series, a glass-reinforced hydroxyapatite synthetic bone substitute, with osteoinductive and osteoconductive proprieties, was applied. This synthetic bone substitute comprises the incorporation of P2O5-CaO glass-based system within a hydroxyapatite matrix, moulded into spherical pellets with 250-500 μm of diameter. A total of 14 veterinary clinical cases of appendicular bone defects and maxillary / mandibular bone defects are described. In all clinical cases, the synthetic bone substitute was used to fill bone defects, enhancing bone regeneration and complementing the recommended surgical techniques. Results demonstrated that it is an appropriate synthetic bone graft available to be used in veterinary patients. It functioned as a space filler in association with standard orthopaedic and odontological procedures of stabilization, promoting a faster bone fusion without any local or systemic adverse reactions. This procedure improves the animals’ quality of life, decreasing pain and post-operative recovery period, as well as increasing bone stability improving positive clinical outcomes.
Oliver Gembruch,Elias Lemonas,Yahya Ahmadipour,Ulrich Sure,Nicolai El Hindy,Richard Dodel,Oliver Müller 대한척추신경외과학회 2019 Neurospine Vol.16 No.2
Objective: Demographic changes have led to a higher incidence of C-2 fractures, especially in elderly patients. For patients with type II fractures, treatment remains controversial, as discussed by Anderson and D’Alonzo, due to the rising morbidity and mortality rates for any treatment. The aim of this study was to compare conservative and surgical management in patients with type II C-2 fractures regarding outcomes, complications, and the mortality rate. Methods: A retrospective analysis was performed of the medical records, X-rays, and/or computed tomography scans of patients ≥80 years of age with type II fractures who were admitted to our Department of Neurosurgery between January 1990 and December 2017. The success of treatment was evaluated 3 months after surgery. Results: In total, 125 patients were included, of whom 98 were treated surgically and 27 were treated conservatively. Surgical treatment was successful in 90.8% of cases, while conservative treatment was successful in 70.0%. The in-hospital mortality was 14.29% and the 3-month mortality was 27.8% in the surgical group, compared to 3.7% and 20% in the conservatively treated group. The in-hospital complication rate was 22.4% in the surgically treated patients and 7.4% in the conservatively treated patients. Conclusion: Surgical treatment of type II fractures seemed to be associated with higher success and complication rates than conservative treatment. Nevertheless, 3-month mortality was comparable in both groups. Therefore, we conclude that surgical treatment for type II fractures in elderly patients is superior to conservative management, although conservative treatment remains a valuable option in elderly patients with severe comorbidities.
Adaptive Local Model Networks with Higher Degree Polynomials
Oliver Banfer,Marlon Franke,Oliver Nelles 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
A new adaptation method for local model networks with higher degree polynomials which are trained by the polynomial model tree (POLYMOT) algorithm is presented in this paper. Usually the local models are linearly parameterized and those parameters are typically adapted by a recursive least squares approach. For the utilization of higher degree polynomials a subset selection method, which is a part of the POLYMOT algorithm, selects and estimates the most significant parameters from a huge parameter matrix. This matrix contains one parameter wi,nx for each input u<SUP>l</SUP>p up to the maximal polynomial degree and for all the combinations of the inputs. It is created during the training procedure of the local model network. For the online adaptation of the trained local model network only the selected parameters should be used. Otherwise the local model network would be too flexible and the idea of subset selection would be lost. Therefore the presented adaptation method generates at first a new parameter matrix with the selected and most significant parameters which are unequal to zero. Afterwards the local model parameters can be adapted with the aid of a standard recursive least squares method.
Lexical Fillers Permit Real-Time Gap-Search inside Island Domains
( Oliver Boxell ) 서울대학교 인지과학연구소 2014 Journal of Cognitive Science Vol.15 No.1
It has often been reported that lexical fillers (e.g. which house) improvethe overall acceptability of many island constraint violations relative to barefillers (e.g. what). The current study attempts to test for the first time whetherlexical fillers reduce real-time sensitivity to wh-islands as well. Results from aneyetracking-while-reading study are reported that demonstrate native Englishspeakers’ sensitivity to a plausibility manipulation between a fronted fillerphrase and a downstream subcategorizing verb inside a wh-island domain. Theeffect is found as the verb was encountered in real-time, and only when thefiller element contains lexical information, not when it is bare. This is takento show that online sensitivity to the wh-island constraint is reduced whenthe filler preceding it is lexical. The strengths and weaknesses and overallcompatibility of a range of grammatical and processing theories are consideredin relation to this finding.
Oliver Muñiz-Serrato,Juan Serrato Rodríguez 한양대학교 세라믹연구소 2018 Journal of Ceramic Processing Research Vol.19 No.4
The low temperature sol-gel approach is used in which the titanium butoxide (IV) precursor is hydrolyzed in the presence ofacetic and nitric acids to form a bidentate acetate complex (1538, 1429 cm−1 IR doublet). It is known that the role of the aceticacid as a chemical modifier controls the condensation and oligomerization reactions, but other effect of the complex acetateligand comprises the preferential crystallization of the titania into the anatase phase. In addition, it is found here, that thepresence of such a ligand at acidic pH values considerably impacts the nanostructure i.e. the formation of smooth hydrophobicanatase films containing fine non-aggregated nano-crystallites with auto-assembled micro pores. The resulting anatase-acetatenano-crystalline material is used to form thin films by the flow coating process. 4.2 nm size crystalline anatase and fullydispersed nanoparticles form a pattern of ultra-small crystallites as shown by TEM that are presumably responsible for theremarkable smooth and macro porous thin films with applications in photo-catalysis.