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Cross-sectional View (cross-sectional + view)

Distribution by Scientific Domains
Medical Sciences60%
Polymers and Materials Science40%

Selected Abstracts

Growth and Transfer of Monolithic Horizontal ZnO Nanowire Superstructures onto Flexible Substrates

ADVANCED FUNCTIONAL MATERIALS, Issue 9 2010
Sheng Xu
A method of fabricating horizontally aligned ZnO nanowire (NW) arrays with full control over the width and length is demonstrated. A cross-sectional view of the NWs by transmission electron microscopy shows a "mushroom-like" structure. Novel monolithic multisegment superstructures are fabricated by making use of the lateral overgrowth. Ultralong horizontal ZnO NWs of an aspect ratio on the order of ten thousand are also demonstrated. These horizontal NWs are lifted off and transferred onto a flexible polymer substrate, which may have many great applications in horizontal ZnO NW-based nanosensor arrays, light-emitting diodes, optical gratings, integrated circuit interconnects, and high-output-power alternating-current nanogenerators. [source]

Transparent and Photo-stable ZnO Thin-film Transistors to Drive an Active Matrix Organic-Light- Emitting-Diode Display Panel

ADVANCED MATERIALS, Issue 6 2009
Sang-Hee K. Park
Transparent ZnO thin-film transistors (TFTs) with a defect-controlled channel and channel/dielectric interface maintain good photo-stability during device operation. The figure shows a cross-sectional view of a top-gate ZnO-based transparent TFT/storage capacitor cell structure, connected to front-panel organic-light-emitting-diode pixels to operate in bottom emission mode. [source]

Cover Picture: J. Biophoton.

JOURNAL OF BIOPHOTONICS, Issue 8-9 2009
8-9/200
Diffraction images of melanoma cells using a microscope objective (background) and cross-sectional view of the 3D structure of a B16/GPR4 cell (insert) (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Competence in the musculoskeletal system: assessing the progression of knowledge through an undergraduate medical course

MEDICAL EDUCATION, Issue 12 2004
Subhashis Basu
Background, Professional bodies have expressed concerns that medical students lack appropriate knowledge in musculoskeletal medicine despite its high prevalence of use within the community. Changes in curriculum and teaching strategies may be contributing factors to this. There is little evidence to evaluate the degree to which these concerns are justified. Objectives, To design and evaluate an assessment procedure that tests the progress of medical students in achieving a core level of knowledge in musculoskeletal medicine during the course. Participants and Setting, A stratified sample of 136 volunteer students from all 5 years of the medical course at Sheffield University. Methods, The progress test concept was adapted to provide a cross-sectional view of student knowledge gain during each year of the course. A test was devised which aimed to provide an assessment of competence set at the standard required of the newly qualified doctor in understanding basic and clinical sciences relevant to musculoskeletal medicine. The test was blueprinted against internal and external guidelines. It comprised 40 multiple-choice and extended matching questions administered by computer. Six musculoskeletal practitioners set the standard using a modified Angoff procedure. Results, Test reliability was 0.6 (Cronbach's ,). Mean scores of students increased from 41% in Year 1 to 84% by the final year. Data suggest that, from a baseline score in Year 1, there is a disparate experience of learning in Year 2 that evens out in Year 3, with knowledge progression becoming more consistent thereafter. All final year participants scored above the standard predicted by the Angoff procedure. Conclusions, This short computer-based test was a feasible method of estimating student knowledge acquisition in musculoskeletal medicine across the undergraduate curriculum. Tested students appear to have acquired a satisfactory knowledge base by the end of the course. Knowledge gain seemed relatively independent of specialty-specific clinical training. Proposals from specialty bodies to include long periods of disciplinary teaching may be unnecessary. [source]

A Restoratively Driven Ridge Categorization, as Determined by Incorporating Ideal Restorative Positions on Radiographic Templates Utilizing Computed Tomography Scan Analysis

CLINICAL IMPLANT DENTISTRY AND RELATED RESEARCH, Issue 4 2009
Nicolas Elian DDS
ABSTRACT Background: The introduction of implants into the field of dentistry has revolutionized the way we evaluate edentulous ridges. In an attempt to evaluate the deficient edentulous ridge, numerous classification systems have been proposed. Each of these classification systems implements a different approach for evaluating and planning treatment for the ridge deficiency. Purpose: The purpose of the present investigation was to propose a restoratively driven ridge categorization (RDRC) for horizontal ridge deformities based on an ideal implant position as determined through implant simulation, utilizing computed tomography (CT) scan images. Materials and Methods: Radiographic templates were developed to capture the ideal restorative tooth position. Measurements were performed using CT scan software in a cross-sectional view and by virtual placement of a parallel-sided implant with a 3.25-mm diameter. Results: Edentulous ridges were divided into five groupings: Group I, simulated implants with at least 2 mm of facial bone, accounted for 19.4% of ridges; Group II, simulated implant completely surrounded by bone, with less than 2 mm of facial plate thickness, accounted for 10.4% of ridges; Group III, wherein dehiscences are detected but no fenestrations are present, accounted for 33.3% of ridges; Group IV, wherein fenestrations are detected but no dehiscence is present, accounted for 6.3% of ridges; and Group V, wherein both dehiscences and fenestrations are present, accounted for 30.6% of ridges. Conclusion: The use of RDRC indicates that a high number of cases in the maxillary anterior area would require augmentation procedures in order to achieve ideal implant placement and restoration. [source]