Biomechanics of cross-sectional size and shape in the hominoid mandibular corpus

Free charge carrier concentration in arrays of silicon nanowires (SiNWs) with cross-sectional size of the order of 100[Formula: see text]nm was quantitatively studied by means of the infrared spectroscopy in an attenuated total reflection mode. SiNWs were formed on lightly-doped [Formula: see text]-type crystalline silicon substrates by metal-assisted chemical etching followed by additional doping through thermoactivated diffusion of boron at 900–1000∘C. The latter process was found to increase the concentration of free holes in SiNWs up to [Formula: see text][Formula: see text]cm[Formula: see text]. Potential applications of highly doped SiNWs in thermoelectric energy converters and infrared plasmonic devices are discussed.

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Identification of the Location of Conductive Filaments Formed in Pt/NiO/Pt Resistive Switching Cells and Investigation on Their Properties

MRS Proceedings ◽

10.1557/opl.2012.1025 ◽

2012 ◽

Vol 1430 ◽

Author(s):

Tatsuya Iwata ◽

Yusuke Nishi ◽

Tsunenobu Kimoto

Keyword(s):

Resistive Switching ◽

Chemical Properties ◽

Cell Resistance ◽

Forming Process ◽

Tem Analysis ◽

Cross Sectional ◽

Size And Shape

ABSTRACTExact locations of conductive filaments formed in NiO-based resistive switching (RS) cells were detected by C-AFM, and their electrical as well as chemical properties were investigated. After a forming process, a part of top electrodes of Pt/NiO/Pt RS cells is deformed. NiO layers are also deformed, and conductive spots, i.e. filaments have been found preferentially along the edges of deformations. Detailed C-AFM investigation has revealed that variation of cell resistances originates from differences in size and shape of filaments, not their resistivity. Furthermore, cross-sectional TEM analysis has demonstrated that filaments determining cell resistance consist of reduced NiO with an inclusion of Pt.

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Endoscopic and Histopathological Characteristics of Polypoid and Non-Polypoid Colorectal Lesions in Patients of a Social Security Hospital of Lambayeque, Peru

10.53350/pjmhs211582284 ◽

2021 ◽

Vol 15 (8) ◽

pp. 2284-2287

Author(s):

Jhon Franksis Munoz Chumpen ◽

Mario J. Valladares-garrido

Keyword(s):

Social Security ◽

Transverse Colon ◽

Cross Sectional Study ◽

Hyperplastic Polyps ◽

Sectional Study ◽

Cross Sectional ◽

Size And Shape ◽

Intestinal Polyps ◽

Paris Classification

Objective: To describe the endoscopic and histopathological characteristics of polypoid and non-polypoid colorectal lesions at the Luis Heysen Inchaustegui hospital, Peru, 2017-2018. Materials and methods: Descriptive-analytical cross-sectional study. We study epidemiological, endoscopic and histopathological variables. location, Size and shape of the lesions taking into account the Paris classification. Results: Endoscopically, of a total of 81 colorectal lesions, the majority were non-polypoid (71.6%). Lesions smaller than 10mm represented 90.1% in non-polypoid lesions and 56.5 % in polypoid lesions. Histopathologically, non-adenomatous lesions predominated (53.0%). Conclusions: The most frequent lesions were non-polypoid, the main location being the rectum; while in polypoid lesions, the transverse colon. Regarding size, lesions smaller than 10mm predominated in both non-polypoid and polypoid lesions. Histopathologically, the most frequent were non-adenomatous lesions (hyperplastic polyps); for its part, the predominant adenoma subtype was tubular. Keywords: Adenomas; Polyps; Intestinal Polyps; Colon (source: DeCS BIREME).

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Structural Design of a Multifunctional Morphing Fowler Flap for a Twin-Prop Regional Aircraft

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation, and Control of Adaptive Systems; Integrated System Design and Implementation ◽

10.1115/smasis2018-7937 ◽

2018 ◽

Author(s):

Francesco Rea ◽

Francesco Amoroso ◽

Rosario Pecora ◽

Maria Chiara Noviello ◽

Maurizio Arena

Keyword(s):

Finite Element ◽

Analysis Tool ◽

Load Path ◽

Element Analysis ◽

Cross Sectional ◽

Aerodynamic Performances ◽

Cross Sectional Size ◽

Elementary Methods ◽

Minimum Number ◽

Mode 3

In the framework of Clean Sky 2 Airgreen 2 (REG-IADP) European research project, a novel multifunctional morphing flap technology was investigated to improve the aerodynamic performances of the next Turboprop regional aircraft (90 passengers) along its flight mission. The proposed true-scale device (5 meters span with a mean chord of 0.6 meters) is conceived to replace and enhance conventional Fowler flap with new functionalities. Three different functions were enabled: overall airfoil camber morphing up to +30° (mode 1), +10°/−10° (upwards/downwards) deflections of the flap tip segment (mode 2), flap tip “segmented” twist of ±5° along the outer flap span (mode 3). Morphing mode 1 is supposed to be activated during take-off and landing only to enhance aircraft high-lift performances and steeper initial climb and descent. Thanks to this function, more airfoil shapes are available at each flap setting and therefore a dramatic simplification of the flap deployment system may be implemented. Morphing modes 2 and 3 are enabled in cruise and off-design flight conditions to improve wing aerodynamic efficiency. The novel structural concept of the three-modal morphing Fowler flap (3MMF) was designed according to the challenges posed by real wing installation issues. The proposed concept consists of a multi-box arrangement activated by segmented ribs with embedded inner mechanisms to realize the transition from the baseline configuration to different target aero-shapes while withstanding the aerodynamic loads. Lightweight and compact actuating leverages driven by electromechanical motors were properly synthesized to comply with stringent requirements for real aircraft implementation: minimum actuating torque, minimum number of motors, reduced weight, and available design space. The methodology for the kinematic design of the inner mechanisms is based on a building block approach where the instant center analysis tool is used to preliminary select the locations of the hinges’ leverages. The final geometry of the inner mechanisms is optimized to maximize the mechanical advantage as well as to provide the kinematic performances required by the three different morphing modes. The load-path was evaluated, and the cross-sectional size of leverages was subsequently optimized. Finally, actuating torques predicted by instant center analysis were compared to the calculated values from finite element analysis. The structural sizing process of the multi-box arrangement was carried out considering elementary methods, and results were compared with finite element simulations.

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Morphology of the corpus callosum at different stages of schizophrenia: Cross-sectional study in first-episode and chronic illness

The British Journal of Psychiatry ◽

10.1192/bjp.bp.107.041251 ◽

2008 ◽

Vol 192 (6) ◽

pp. 429-434 ◽

Cited By ~ 56

Author(s):

Mark Walterfang ◽

Amanda G. Wood ◽

David C. Reutens ◽

Stephen J. Wood ◽

Jian Chen ◽

...

Keyword(s):

Corpus Callosum ◽

Chronic Schizophrenia ◽

Cross Sectional Study ◽

First Episode ◽

Schizophrenia Spectrum Disorders ◽

Cross Sectional ◽

Size And Shape ◽

Schizophrenia Spectrum ◽

First Episode Schizophrenia ◽

Parietal Cortices

BackgroundThe shape of the corpus callosum may differ in schizophrenia, although no study has compared first-episode with established illness.AimsTo investigate the size and shape of the corpus callosum in a large sample of people with first-episode and established schizophrenia.MethodCallosal size and shape were determined using highresolution magnetic resonance imaging on 76 patients with first-episode schizophrenia-spectrum disorders, 86 patients with established schizophrenia and 55 healthy participants.ResultsThere were no significant differences in total area across groups. Reductions in callosal width were seen in the region of the anterior genu in first-episode disorder (P<0.005). Similar reductions were seen in the chronic schizophrenia group in the anterior genu, but also in the posterior genu and isthmus (P = 0.0005).ConclusionsReductions in anterior callosal regions connecting frontal cortex are present at the onset of schizophrenia, and in established illness are accompanied by changes in other regions of the callosum connecting cingulate, temporal and parietal cortices.

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