Linear displacement estimation of a mobile device is useful in various real time applications, such as inertial navigation systems, video surveillance, video encoding etc. Present state of the art techniques perform the global motion estimation using image processing techniques, which requires complex computations and more power consumption. Here, an attempt has been made to estimate the linear...

The correlation of sounds with behavior in groups of free-ranging whales has been restricted by the difficulty of determining which animal made the sound. A real-time device was designed and built to directionalize on the underwater sounds of Southern Right Whales, Euhaiaena australis. The device measures the phase difference between the signals from a two-dimensional hydrophone array and calcu...

For two main reasons, dermatology is one of the later medical disciplines to use imaging techniques: 1) skin lesions are readily visible to the naked eye or through a magnifying glass, allowing clinical diagnosis with no invasive examination, 2) skin lesions can easily be biopsied or removed for histological study. This approach has therefore remained the basis of clinicopathological diagnosis ...

In this paper, we present an autonomous guidance service by combining the position information from NFC and the orientation information from a 6 axis acceleration and terrestrial magnetism sensor. We developed an algorithm to calculate the device orientation based on the data from acceleration and terrestrial magnetism sensor. If visitors want to know some explanation about an exhibit in front ...

We demonstrate the first electrically pumped continuous-wave (CW) III-V semiconductor lasers epitaxially grown on on-axis (001) silicon substrates without offcut or germanium layers, using InAs/GaAs quantum dots as the active region and an intermediate GaP buffer between the silicon and device layers. Broad-area lasers with uncoated facets achieve room-temperature lasing with threshold current ...

A new class of tri-axial miniature magnetometer consisting of a planar fluxgate structure with an orthogonal ferromagnetic fluxguide centrally situated over the magnetic cores is presented. The magnetic sensor possesses a cruciform ferromagnetic core placed diagonally upon the square excitation coil under which two pairs of pick-up coils for in-plane field detection are allocated. Effective pri...

A seven axis haptic device, called the Freedom-7, is described in relation to its application to surgical training. The generality of its concept makes it also relevant to most other haptic applications. The design rationale is driven by a long list of requirements since such a device is meant to interact with the human hand: uniform response, balanced inertial properties, static balancing, low...

Modern confocal microscopes enable high-precision measurement in three dimensions by collecting stacks of 2D (x-y) images that can be assembled digitally into a 3D image. It is difficult, however, to ensure position accuracy, particularly along the optical (z) axis where scanning is performed by a different physical mechanism than in x-y. We describe a simple device to calibrate simultaneously ...

Off-axis electron holography has been used to measure the width of depletion region in a series tunnel junction GaN light emitting diodes that have prepared using different growth processes for blue emission. The total measured potentials are combinations mean inner potential, dopant and piezoelectric contributions. potential unmixed from such junctions can be measured. experimental results the...