52 research outputs found
Некоторые аспекты преподавания физиотерапевтических методов лечения на кафедре факультетской терапии
МЕТОДИКА ПРЕПОДАВАНИЯПРЕПОДАВАНИЕОБУЧЕНИЕ /МЕТОДЫФИЗИОТЕРАПИИ МЕТОДЫ /ОБУЧОБРАЗОВАНИЕ МЕДИЦИНСКОЕКАФЕДРА ФАКУЛЬТЕТСКОЙ ТЕРАПИИТЕРАПИЯ (ДИСЦИПЛИНА) /ОБУЧТЕХНОЛОГИЯ ОБУЧЕНИЯОБРАЗОВАНИЯ ТЕХНОЛОГИЯПЕДАГОГИЧЕСКИЕ ТЕХНОЛОГИ
Time-resolved photoluminescence properties of AlGaN/AlN/GaN high electron mobility transistor structures grown on 4H-SiC substrate
Investigation of the interface between silicon nitride passivations and AlGaN/AlN/GaN heterostructures by C(V) characterization of metal-insulator-semiconductor-heterostructure capacitors
Characterization of InGaN/GaN quantum well growth using monochromated valence electron energy loss spectroscopy
Linearly polarized photoluminescence of InGaN quantum disks embedded in GaN nanorods
We have investigated the emission from InGaN/GaN quantum disks grown on the tip of GaN nanorods. The emission at 3.21 eV from the InGaN quantum disk doesn't show a Stark shift, and it is linearly polarized when excited perpendicular to the growth direction. The degree of linear polarization is about 39.3% due to the anisotropy of the nanostructures. In order to characterize a single nanostructure, the quantum disks were dispersed on a SiO2 substrate patterned with a metal reference grid. By rotating the excitation polarization angle from parallel to perpendicular relative to the nanorods, the variation of overall PL for the 3.21 eV peak was recorded and it clearly showed the degree of linear polarization (DLP) of 51.5%
Maximum temperatures of 89°C recorded during the mechanical preparation of 35 femoral heads for resurfacing
In-situ tool wear monitoring and its effects on the performance of porcine cortical bone drilling: a comparative in-vitro investigation
An Ultrasound Assisted Anchoring Technique (BoneWelding® Technology) for Fixation of Implants to Bone – A Histological Pilot Study in Sheep
The BoneWelding® Technology offers new opportunities to anchor implants within bone. The technology melted the surface of biodegradable polymer pins by means of ultrasound energy to mould material into the structures of the predrilled bone. Temperature changes were measured at the sites of implantation in an in vitro experiment. In the in vivo part of the study two types of implants were implanted in the limb of sheep to investigate the biocompatibility of the method. One implant type was made of PL-DL-lactide (PLA), the second one was a titanium core partially covered with PLA. Healing period was 2 and 6 months, with 3 sheep per group. Bone samples were evaluated radiologically, histologically and histomorphometrically for bone remodeling and inflammatory reactions. Results demonstrated mild and short temperature increase during insertion. New bone formed at the implant without evidence of inflammatory reaction. The amount of adjacent bone was increased compared to normal cancellous bone. It was concluded that the BoneWelding® Technology proved to be a biocompatible technology to anchor biodegradable as well as titanium-PLA implants in bone
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