Any 2-bridge knot in S has a bridge sphere from which any other bridge surface can be obtained by stabilization, meridional stabilization, perturbation and proper isotopy.

Tutte’s famous 5-flow conjecture asserts that every bridgeless graph has a nowhere-zero 5-flow. Seymour proved that every such graph has a nowhere-zero 6-flow. Here we give (two versions of) a new proof of Seymour’s Theorem. Both are roughly equal to Seymour’s in terms of complexity, but they offer an alternative perspective which we hope will be of value.

We present optical spectroscopy, B,V,R and I CCD photometry and VLA neutral hydrogen observations of the interacting quartet NGC6845, also know as Klemola 30. NGC6845A, the dominant component, sports a broad and bright tidal bridge and a faint tidal tail, which bifurcate. The tidal bridge has a (B-I) color bluer than that of NGC6845A inner disk. Five strong condensations, identified as Hii regi...

This paper describes the design of the elastic body of a new torque sensor to measure torsion moment faithfully in the presence of strong overhang and thrust forces as well as bending moments. This feature, in conjunction with high stiiness makes this sensor an ideal choice for robotic applications. The structure inherently exhibits minimum strain sensitivities and compliances to all non-torsio...

The electro-tactile display with localized high-speed switching is a novel type of electro-tactile display based on H-Bridge circuit that uses only one electrical source at a time. By using this display electrical stimulations can easily be presented and measured simultaneously. In this paper, other new methods for electrical stimulation, including scan-type ectrical stimulation and dipole elec...

Objective...........................................................................................................................1 Harmonic Oscillators........................................................................................................1 Tuned Circuit' Oscillator...................................................................................................2 Experiment ...

This study demonstrates a novel method for electrical detection of C-reactive protein (CRP) as a means of identifying an infection in the body, or as a cardiovascular disease risk assay. The method uses a single free-standing, thermally controlled piezoresistive microcantilever biosensor. In a commonly used sensing arrangement of conventional dual cantilevers in the Wheatstone bridge circuit, r...

According to the auditory principle of fish’s lateral line organ, a novel microelectromechanical systems (MEMS) bionic vector hydrophone used for obtaining vector information of underwater sound field is introduced in this paper. It is desirable that the application of MEMS-based piezoresistive effect and bionics structure may improve the low-frequency sensitivity of the vector hydrophone as we...

The present work deals with the development of low cost, appreciably accurate precision electronic circuit for resistive sensor where measurement of the incremental resistance change with high degree of accuracy is essential. A linear and sensitive active half bridge circuit requiring only few components for its hardware implementation has been proposed for measuring very small resistance chang...

The paper deals with a pair of current-mode sine-wave oscillator circuits. Both these circuits are implemented using positive second-generation current conveyors (CCII+). The principle of the first oscillator is based on a conventional Wien-bridge network. However, this implementation suffers from the use of a floating capacitor, which can be unacceptable in the case of on-chip integration. Thi...