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Digital Imaging and Communications in Medicine (DICOM) as standard in digital pathology

HISTOPATHOLOGY 2012年第1期61卷 132-134页

作者： Kalinski, Thomas Zwoenitzer, Ralf Rossner, Mathias Hofmann, Harald Roessner, Albert Guenther, Thomas Otto Von Guericke Univ Dept Pathol Magdeburg Germany Imassense Deutschland GmbH Berlin Germany Univ Hosp Dept Pathol & Neuropathol Essen Germany Otto Von Guericke Univ Dept Med IT Magdeburg Germany St Marks Hosp Acad Dept Histopathol Harrow Middx England

A letter to the editor is presented in response to a review by Al-Janabi and colleagues on the use of digital imaging systems in histopathology.

关键词： Diagnostic Imaging/methods Diagnostic Imaging/standards Humans Image processing, computer-assisted/methods Image processing, computer-assisted/standards Imaging, Three-Dimensional/instrumentation Imaging, Three-Dimensional/standards Pathology, Surgical/methods signal processing, computer-assisted/instrumentation Telepathology/instrumentation Telepathology/methods

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From stochastic single atomic switch to nanoscale resistive memory device

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NANOSCALE 2011年第4期3卷 1504-1507页

作者： Geresdi, Attila Halbritter, Andras Gyenis, Andras Makk, Peter Mihaly, Gyoergy Budapest Univ Technol & Econ Dept Phys H-1111 Budapest Hungary Hungarian Acad Sci Condensed Matter Res Grp H-1111 Budapest Hungary

We study the switching characteristics of nanoscale junctions created between a tungsten tip and a silver film covered by a thin ionic conductor layer. Atomic-sized junctions show spectacular current induced switching characteristics, but both the magnitude of the switching voltage and the direction of the switching vary randomly for different junctions. In contrast, somewhat larger junctions with diameters of a few nanometres display a well defined, reproducible switching behavior attributed to the formation and destruction of nanoscale channels in the ionic conductor surface layer. Our results define a lower size limit of 3 nm for reliable ionic nano-switches, which is well below the resolution of recent lithographic techniques.

关键词： Electric Conductivity Electric Conductivity Equipment Design Equipment Failure Analysis Microelectrodes Nanotechnology/instrumentation signal processing, computer-assisted/instrumentation Silver/chemistry Stochastic Processes

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A novel logic switch based on individual ZnO nanotetrapods

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NANOSCALE 2011年第5期3卷 2166-2168页

作者： Sun, Kai Qi, Junjie Zhang, Qi Yang, Ya Zhang, Yue Univ Sci & Technol Beijing State Key Lab Adv Met & Mat Sch Mat Sci & Engn Beijing 100083 Peoples R China Univ Sci & Technol Beijing Key Lab New Energy Mat & Technol Beijing 100083 Peoples R China

Logic switch based on individual ZnO nanotetrapods was designed and the electromechanical properties were in situ investigated using scanning electron microscopy. The current through two adjacent legs of the tetrapod can be tuned by applying force on the leg that is perpendicular to the substrate. By applying a pulse force on the leg, this device revealed a good sensitivity and an on/off ratio of 1.14 was achieved. The piezoelectric electrical field at the root of the nanotetrapod may contribute to these logic devices, and logic states depend on the direction of built-in potential induced by piezoelectricity and the source-drain current direction.

关键词： Equipment Design Equipment Failure Analysis Micro-Electrical-Mechanical Systems/instrumentation Nanostructures/chemistry Nanostructures/ultrastructure Nanotechnology/instrumentation Particle Size signal processing, computer-assisted/instrumentation Stress, Mechanical Zinc Oxide/chemistry

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Synthesis of single crystalline CdS nanocombs and their application in photo-sensitive field emission switches

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NANOSCALE 2011年第3期3卷 1078-1083页

作者： Chavan, Padmakar G. Badadhe, Satish S. Mulla, Imtiaz S. More, Mahendra A. Joag, Dilip S. Univ Pune Dept Phys Ctr Adv Studies Mat Sci & Condensed Matter Phys Pune 411007 Maharashtra India Natl Chem Lab Phys & Mat Chem Div Pune 411008 Maharashtra India

Single crystalline CdS nanocombs were synthesized by a thermal evaporation route. The photo-sensitive field emission current shows a reproducible switching behavior, with a rise in current level of nearly five times the initial preset value of similar to 1 mu A. An ultra low turn-on field, required to draw an emission current density of similar to 0.1 mu A cm(-2) (100 nA), is found to be similar to 0.26 V mu m(-1) (260 V), which is much lower than the reported values for various other CdS nanostructures. Upon illumination with visible light the CdS nanocombs act as a photo field emission switch. At an applied field of similar to 0.65 V mu m(-1) the current densities are observed to be similar to 14.6 mu A cm(-2) and similar to 26.9 mu A cm(-2), without and with light illumination, respectively. The average emission current is seen to be stable over the duration of measurement for two preset values. The high sensitivity and fast response in the visible range indicates that the CdS nanocombs can be used as a photo-sensitive field emitting switch in device applications, and also in pulsed electron beam technology.

关键词： Cadmium Compounds/chemistry Cadmium Compounds/radiation effects Equipment Design Equipment Failure Analysis Light Light Materials Testing Nanostructures/chemistry Nanostructures/radiation effects Nanostructures/ultrastructure Photometry/instrumentation signal processing, computer-assisted/instrumentation Sulfides/chemistry Sulfides/radiation effects

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BackgroundCorrector - a software program for fast and user-friendly improvement of digital photomicrographs

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HISTOPATHOLOGY 2011年第2期59卷 341-342页

作者： Tsybrovskyy, Oleksiy Roessann-Tsybrovskyy, Martina Regitnig, Peter Med Univ Graz Inst Pathol Graz Austria

A letter to the editor is presented in response to the article 'How to improve microscopic images obtained with consumer-type digital cameras,' by Peter Regitnig, Olesksiy Tsybrovskyy, and R. van Paasen in the... 详细信息

关键词： Humans Image Enhancement/methods Photomicrography/instrumentation signal processing, computer-assisted/instrumentation Software

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An approach to the elimination of inter-individual variability in tumor detection

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ANALYST 2010年第5期135卷 875-879页

作者： Zhai, Hong Lin Chang, Ya Ting Wu, Chih Ching Yu, Jau Song Lanzhou Univ Coll Chem & Chem Engn Lanzhou 730000 Peoples R China Chang Gung Univ Mol Med Res Ctr Taipei Taiwan

The inter-individual variability among biological samples is different from the random error produced in experimental examination because that reveals the characteristic of samples themselves, and often works on the results of analysis and diagnosis in biomedicine research. In this paper, the methodology of signal processing and the technique of wavelet analysis were introduced to decrease the inter-individual variability of samples in tumor detection. The 16 antibody biomarkers for tumor detection were determined by means of the BioPlex system based on 199 plasma samples, and were regarded as 16 signal channels. Then, as a noise signal, the inter-individual variability of samples was reduced by wavelet transforms, which was evaluated by a rank sun hypothesis test, receiver operating characteristic curve analysis and classification tree models. After inter-individual variability was removed using the wavelet transform, the tumor detection algorithms produced results that had more accuracy and greater reliability. Our study provided a novel approach to the pretreatment of biomedical data.

关键词： Algorithms Antibodies, Neoplasm/blood Area Under Curve Discriminant Analysis Humans Nasopharyngeal Neoplasms/diagnosis Observer Variation ROC Curve signal processing, computer-assisted/instrumentation Tumor Markers, Biological/blood

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Influence of "novel" speech processors on the speech perception performance of cochlear implant users

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HNO 2009年第6期57卷 563-+页

作者： Baljic, I. HELIOS Klinikum Erfurt Klin Hals Nasen & Ohrenheilkunde D-99089 Erfurt Germany HELIOS Klinikum Berlin Buch Klin Hals Nasen Ohren Heilkunde Kopf & Halschirur Berlin Germany

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A binary-decision-diagram-based two-bit arithmetic logic unit on a GaAs-based regular nanowire network with hexagonal topology

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NANOTECHNOLOGY 2009年第24期20卷 245203 (7p-245203 (7p页

作者： Zhao, Hong-Quan Kasai, Seiya Shiratori, Yuta Hashizume, Tamotsu Hokkaido Univ Res Ctr Integrated Quantum Elect Sapporo Hokkaido 0608628 Japan Hokkaido Univ Grad Sch Informat Sci & Technol Sapporo Hokkaido 0600814 Japan Japan Sci & Technol Agcy PRESTO Kawaguchi Saitama 3320012 Japan

A two-bit arithmetic logic unit (ALU) was successfully fabricated on a GaAs-based regular nanowire network with hexagonal topology. This fundamental building block of central processing units can be implemented on a regular nanowire network structure with simple circuit architecture based on graphical representation of logic functions using a binary decision diagram and topology control of the graph. The four-instruction ALU was designed by integrating subgraphs representing each instruction, and the circuitry was implemented by transferring the logical graph structure to a GaAs-based nanowire network formed by electron beam lithography and wet chemical etching. A path switching function was implemented in nodes by Schottky wrap gate control of nanowires. The fabricated circuit integrating 32 node devices exhibits the correct output waveforms at room temperature allowing for threshold voltage variation.

关键词： Arsenicals/chemistry Crystallization/methods Electronics/instrumentation Equipment Design Equipment Failure Analysis Gallium/chemistry Macromolecular Substances/chemistry Materials Testing Mathematics Molecular Conformation Nanostructures/chemistry Nanostructures/ultrastructure Nanotechnology/instrumentation Particle Size signal processing, computer-assisted/instrumentation Surface Properties

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Carrier transport mechanisms of bistable memory devices fabricated utilizing core-shell CdSe/ZnSe quantum-dot/multi-walled carbon nanotube hybrid nanocomposites

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NANOTECHNOLOGY 2009年第8期20卷 085202 (5p-085202 (5p页

作者： Li, Fushan Son, Dong Ick Kim, Tae Whan Ryu, Euidock Kim, Sang Wook Hanyang Univ Div Elect & Comp Engn Seoul 133791 South Korea Ajou Univ Dept Mol Sci & Technol Suwon 443749 South Korea

Transmission electron microscopy images showed that conjugation between single core-shell CdSe/ZnSe quantum dots (QDs) and oxidized multi-walled carbon nanotubes (MWCNTs) was achieved through the complexation reaction. Current-voltage (I-V) measurements on Al/CdSe: MWCNT conjugated nanocomposite/indium-tin-oxide devices at 300 K showed that the on/off ratio of the current bistability was as large as about 10(4), which was significantly increased due to an enhancement of the carrier transfer efficiency between the CdSe/ZnSe QDs and the MWCNTs. Carrier transport mechanisms of the bistable memory devices fabricated utilizing CdSe/ZnSe QD/MWCNT hybrid nanocomposite are described on the basis of the I-V results.

关键词： Cadmium Compounds/chemistry Electron Transport Equipment Design Equipment Failure Analysis Information Storage and Retrieval Nanotechnology/instrumentation Nanotubes, Carbon/chemistry Nanotubes, Carbon/ultrastructure Quantum Dots Quantum Dots Selenium Compounds/chemistry signal processing, computer-assisted/instrumentation Zinc Compounds/chemistry

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Tensometry -: Concept and first results of a new technique for measuring the tube function via highly flexible foil strain gauges

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LARYNGO-RHINO-OTOLOGIE 2008年第8期87卷 542-545页

作者： Zehlicke, T. Behrend, D. Schmidt, W. Hoffmann, F. Mueller, J. Pau, H. W. Bundeswehrkrankenhaus Hamburg Abt Hals Nasen Ohrenheilkunde Hamburg Germany Univ Rostock Klin & Poliklin Hals Nasen Ohren Heilkunde Kopf & D-2500 Rostock 1 Germany Univ Rostock Inst Biomed Techn D-2500 Rostock 1 Germany Tech Univ Hamburg Inst Mikrosyst Techn Hamburg Germany

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