A 3PRR parallel precision positioning system, driven by three ultrasonic linear motors, was designed for use as the object stage of a scanning electron microscope (SEM). To improve the tracking accuracy of the parallel platform, the positioning control algorithms for the drive joints needed to be studied. The deadzone phenomenon caused by static friction reduces the trajectory tracking accuracy...

Capillary electrophoresis can be used successfully to analyse small peptides to give additional information to that obtained using high-performance liquid chromatography (HPLC). The separation of a modified adrenocorticotropic hormone (4-9) fragment (Org 2766) and several of its fragments was investigated using capillary zone electrophoresis. Prediction of migration in aqueous systems using pKa...

Domain Name System (DNS) is the system for the mapping between easily memorizable host names and their IP addresses. Due to its criticality, security extensions to DNS have been proposed in an Internet Engineering Task Force (IETF) working group to provide authentication. In this paper, we point out two difficulties in the current DNSSEC (DNS Security Extension) standards in the handling of DNS...

This paper reports an fluorescence imaging analysis to verify the proposed mechanisms in transient trapping– microchip micellar electrokinetic chromatography (tr-trapping–MCMEKC). Fluorescence imaging revealed that a process of tr-trapping consisted of four migration stages with different apparent diffusion constants. In the first trapping stage, the diffusion of a focused sample band was suppr...

Abstract Deep-focus earthquakes in the Tonga–Fiji subduction zone make up greater than 66% of the globally recorded deep seismicity. The high number of deep-focus seismicity in this active subduction zone allows us to search for deep-focus similar earthquake pairs and repeating earthquakes. We compile a waveform dataset for deep earthquakes with magnitude above 4.7 occurring in the Tonga–Fiji–K...

Chromatography and electrophoresis are the most common techniques available for the separation of mixtures. For the analysis of large molecules, capillary gel electrophoresis (CGE) was not introduced until the late 1980s, well after most chromatographic techniques. Guttman et al.,1 Cohen et al.,2 and Kasper et al.,3 all independently, combined the principles of slab gel electrophoresis with the...

The effect of order in separation media on DNA capillary zone electrophoresis is studied experimentally. A microfluidic technique based on colloidal self-assembly is employed to generate structures with different degrees of order. A model, SEM, and thermoporosimetry of the structures are employed to characterize media properties. The DNA mobility and dispersion coefficient is quantified in each...

This paper reports the high separation efficiency zone-electrophoresis of proteins in poly(dimethylsiloxane) (PDMS) microchip coated with the physically adsorbed phospholipid polymer, poly(2-methacryloyloxyethyl phosphorylcholine (MPC)-co-3-(methacryloyloxy)propyltris(trimethylsiloxy)silane (MPTSSi)) (PMMSi), using the simple and quick dip coating method. High suppression of protein adsorption ...

The alarming growth of the default free zone (DFZ) routing table prompted a response from the routing research community, which replied with several options, many of them centering around the idea of core-edge separation. The Locator/ID Separation Protocol (LISP) is one of the most promising proposals, which gained momentum recently. Some implementations exist, with a small experimental testbed...

This paper describes a novel approach in simulating laminar to turbulent transition by using two-equation models. The Total Stresses Limitation (TSL) concept is used to make the two-equation model capable of predicting high-Reynolds-number transitional ow. In order to handle the transition triggered by laminar separation at a low Reynolds number location, which commonly occurs in high speed ow,...