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21.
Dieter Keim 《Mathematische Annalen》1972,197(2):133-136
Ohne Zusammenfassung 相似文献
22.
Daniel A. Keim 《Journal of computational and graphical statistics》2013,22(1):58-77
Abstract An important goal of visualization technology is to support the exploration and analysis of very large amounts of data. This article describes a set of pixel-oriented visualization techniques that use each pixel of the display to visualize one data value and therefore allow the visualization of the largest amount of data possible. Most of the techniques have been specifically designed for visualizing and querying large data bases. The techniques may be divided into query-independent techniques that directly visualize the data (or a certain portion of it) and query-dependent techniques that visualize the data in the context of a specific query. Examples for the class of query-independent techniques are the screen-filling curve and recursive pattern techniques. The screen-filling curve techniques are based on the well-known Morton and Peano–Hilbert curve algorithms, and the recursive pattern technique is based on a generic recursive scheme, which generalizes a wide range of pixel-oriented arrangements for visualizing large data sets. Examples for the class of query-dependent techniques are the snake-spiral and snake-axes techniques, which visualize the distances with respect to a data base query and arrange the most relevant data items in the center of the display. In addition to describing the basic ideas of our techniques, we provide example visualizations generated by the various techniques, which demonstrate the usefulness of our techniques and show some of their advantages and disadvantages. 相似文献
23.
Kevin Keim Mohamed Z. Rashed Samuel C. Kilchenmann Aurlien Delattre Antnio F. Gonalves Paul ry Carlotta Guiducci 《Electrophoresis》2019,40(14):1830-1838
This paper reports a method for label‐free single‐cell biophysical analysis of multiple cells trapped in suspension by electrokinetic forces. Tri‐dimensional pillar electrodes arranged along the width of a microfluidic chamber define actuators for single cell trapping and selective release by electrokinetic force. Moreover, a rotation can be induced on the cell in combination with a negative DEP force to retain the cell against the flow. The measurement of the rotation speed of the cell as a function of the electric field frequency define an electrorotation spectrum that allows to study the dielectric properties of the cell. The system presented here shows for the first time the simultaneous electrorotation analysis of multiple single cells in separate micro cages that can be selectively addressed to trap and/or release the cells. Chips with 39 micro‐actuators of different interelectrode distance were fabricated to study cells with different sizes. The extracted dielectric properties of Henrietta Lacks, human embryonic kidney 293, and human immortalized T lymphocytes cells were found in agreements with previous findings. Moreover, the membrane capacitance of M17 neuroblastoma cells was investigated and found to fall in in the range of 7.49 ± 0.39 mF/m2. 相似文献
24.
Duygu İNCİ 《应用有机金属化学》2020,34(12):e6016
NOO-type tridentate Schiff base, N-salicylidene-2-aminobenzoic acid, (H2L), and its ternary Cu (II) complex containing H2L Schiff base and 4,7-dimethyl-1,10-phenanthroline (4,7-dmphen), [Cu(4,7-dmphen)(H2L)]27H2O, have been synthesized and characterized by CHN analysis, ESI-MS, FTIR, and single-crystal X-ray diffraction techniques. The interaction of alone H2L Schiff base ligand and ternary Cu (II) complex with biomacramolecules {calf thymus DNA (CT-DNA) and bovine serum albumin (BSA)} has been investigated by electronic absorption and fluorescence spectroscopy. The experimental results indicate that H2L Schiff base ligand and ternary Cu (II) complex bind to CT-DNA by means of a moderate intercalation mode. Furthermore, the fluorescence quenching mechanism between H2L Schiff base ligand and ternary Cu (II) complex with BSA possesses a static quenching process. Radical scavenging activity of H2L Schiff base ligand and ternary Cu (II) complex was measured in terms of EC50, using the DPPH and H2O2 methods. Biomacromolecule interactions and scavenging activity studies revealed that ternary Cu (II) complex yielded better results than H2L Schiff base ligand alone. 相似文献
25.
Werner Fischer und Heinrich Keim 《Fresenius' Journal of Analytical Chemistry》1948,128(4-5):443-450
Zusammenfassung Durch einige Versuchsserien wird bei verschiedenen Bedingungen die untere Grenze der Ge-Konzentration ermittelt, bis zu der die Fällung dieses Elementes mit H2S brauchbar ist. Am günstigsten erweist sich für kleine Konzentrationen die Fällung aus 6 n H2SO4 unter Nachfällung mit Hg(NO3)2. Ferner werden Maximalwerte für die Löslichkeit von GeS2 in 3–6 n H2SO4 ermittelt.Es werden einige Erfahrungen bei der Destillation von GeCl4 aus salzsaurer Lösung mitgeteilt. Außerdem wird die Verflüchtigung von GeCl4 aus 3–14 n HCl bei 0° untersucht; in 9–14 n HCl ist sie trotz der niedrigen Temperatur noch von überraschender Größe.Nach Vorversuchen von Maria Zumbusch-Pfisterer.Gewidmet aus Anlaß des 100jährigen Bestehens des Laboratoriums Fresenius. 相似文献
26.
W. Geithner U. Georg S. Kappertz M. Keim A. Klein P. Lievens R. Neugart M. Neuroth L. Vermeeren S. Wilbert 《Hyperfine Interactions》2000,129(1-4):271-288
Experiments using laser spectroscopy and nuclear magnetic resonance techniques have been performed at ISOLDE on the unstable
isotopes of several light elements. The results include nuclear ground state spins, magnetic dipole and electric quadrupole
moments, and the behaviour of mean square nuclear charge radii within isotopic strings. These give important information about
the nuclear structure at shell closures and close to the drip lines.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
27.
28.
A mixture of two types of super-paramagnetic colloidal particles with long-range dipolar interaction is confined by gravity
to the flat interface of a hanging water droplet. The particles are observed by video microscopy and the dipolar interaction
strength is controlled via an external magnetic field. The system is a model system to study the glass transition in 2D, and
it exhibits partial clustering of the small particles (N. Hoffmann et al., Phys. Rev. Lett. 97, 078301 (2006)). This clustering is strongly dependent on the relative concentration of big and small particles. However, changing the interaction strength reveals that the clustering does not depend on the interaction strength. The partial clustering scenario is quantified using Minkowski functionals and partial structure factors. Evidence that partial clustering prevents global crystallization is discussed. 相似文献
29.
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