The Management of Drug-Induced Gingival Enlargement in a Patient With Preexisting Periodontitis.

Antihypertensives such as amlodipine, which is a family of calcium channel blockers (CCBs), possess a limitation by causing gingival enlargement on long-term use. Gingival enlargement hinders the patient's oral hygiene maintenance and causes more plaque accumulation and inflammation. The severity of the condition is dependent on dose and duration.

An Interdisciplinary Management of Avulsed Maxillary Incisors: A Case Report.

The current case report presents a case of a road traffic accident comprising dental avulsion of maxillary incisors. A 30-year-old male reported missing teeth following trauma in his upper front tooth region. The avulsion of maxillary right central and lateral incisors along with laceration in upper and lower lips was evident.

Analysis of Articulation Errors in Dysarthric Speech.

Imprecise articulation is the major issue reported in various types of dysarthria. Detection of articulation errors can help in diagnosis. The cues derived from both the burst and the formant transitions contribute to the discrimination of place of articulation of stops.

Acoustic analysis of misarticulated trills in cleft lip and palate children.

In this paper, acoustic analysis of misarticulated trills in cleft lip and palate speakers is carried out using excitation source based features: strength of excitation and fundamental frequency, derived from zero-frequency filtered signal, and vocal tract system features: first formant frequency (F1) and trill frequency, derived from the linear prediction analysis and autocorrelation approach, respectively. These features are found to be statistically significant while discriminating normal from misarticulated trills. Using acoustic features, dynamic time warping based trill misarticulation detection system is demonstrated.

High dietary selenium intake is associated with less insulin resistance in the Newfoundland population.

As an essential nutrient, Selenium (Se) is involved in many metabolic activities including mimicking insulin function. Data on Se in various biological samples and insulin resistance are contradictory, moreover there is no large study available regarding the relationship of dietary Se intake with insulin resistance in the general population. To investigate the association between dietary Se intake and variation of insulin resistance in a large population based study, a total of 2420 subjects without diabetes from the CODING (Complex Diseases in the Newfoundland Population: Environment and Genetics) study were assessed.

Chemical silver coating of fiber tips in near-field scanning optical microscopy.

We report what is believed to be the first experimental demonstration of silver coating by a wet chemical process on tapered fiber tips used in near-field scanning optical microscopy. The process occurs at room temperature and pressure and takes only a few minutes to complete. Many tips can be coated simultaneously.

Interference fringe analysis based on centroid detection.

Phase measurement of interference fringes is an integral part of several fields in optics. Using simple straight sinusoidal fringe patterns, we describe the relationship between fringe position or phase to the centroid position when these fringes are incident on a position sensitive detector. With detailed descriptions and some experimental results, we show that a phenomenal sensitivity is possible in principle with what we believe is a new approach of phase measurement, and excellent sensitivity is readily achieved.

Simple online recognition of optical data strings based on conservative optical logic.

Optical packet switching relies on the ability of a system to recognize header information on an optical signal. Unless the headers are very short with large Hamming distances, optical correlation fails and optical logic becomes attractive because it can handle long headers with Hamming distances as low as 1. Unfortunately, the only optical logic gates fast enough to keep up with current communication speeds involve semiconductor optical amplifiers and do not lend themselves to the incorporation of large numbers of elements for header recognition and would consume a lot of power as well.

Achieving stabilization in interferometric logic operations.

Interferometric systems with amplitude beam splitters can implement reversible operations that, on detection, become Boolean operators. Being passive, they consume no energy, do not limit the operating bandwidth, and have negligible latency. Unfortunately, conventional interferometric systems are notoriously sensitive to uncontrolled disturbances.

Image formation in detuned interference-filter-aided in-line Fraunhofer holography.

Detuned interference filters as Fourier processors can be used to enhance the poor fringe contrast often encountered with in-line Fraunhofer holography of small or many far-fields-away micro-objects. The subsequent effect on the reconstructed-image irradiance distribution is described. The modified aperture-limited image shape and size, and the possible consequences on the quantitative analysis are discussed.

Image power for size analysis in in-line Fraunhofer holography.

The role of total power contained within the reconstructed image in size analysis has been described. Using an aperture-limited hologram and a circular-cross-section opaque object as an example, we show that very accurate size analysis is possible by this mode of analysis.

Dynamics of hologram recording in DuPont photopolymer.

Several dynamical aspects of the DuPont photopolymer film HRF-150-38 for holographic storage are described. We study temporal aspects of exposure, exposure time, processing situations, and storage effect. The quantities studied are diffraction efficiencies, thickness changes, and Bragg angle.

Algorithm for phase-difference measurement in phase-shifting interferometry.

A phase-shifting algorithm is proposed and experimentally demonstrated for phase-difference analysis. The method involves only three steps, the original and two equal in amount but unknown phase steps for each stage. Only six frames of data are thus sufficient for the phase-difference analysis between two stages.

Determination of refractive properties of fluids for dual-wavelength interferometry.

Methods to calculate the refractive properties of solutions at different wavelengths are described by using experimental data at just two wavelengths. The properties are the refractive index and its gradients with temperature and concentration. Cauchy's equation is used to determine the refractive indices.

Removal of the diffraction halo effect in speckle photography by using a negative mask.

A method to neutralize the diffraction halo effect in speckle photography is presented. A negative of the halo is used in the fringe observation plane to achieve this goal. Experimental irradiance distributions as well as Young's fringes with and without the negative mask are presented.

Removing the diffraction halo effect in speckle photography of sinusoidal vibration.

Expressions to eliminate the diffraction halo effects in speckle photography of sinusoidal vibration are derived. Both maxima and minima positions in Young's fringes pattern tern are considereda, nd only the experimentalh alo intensity variation is assumed known.

Volume magnification in particle field holography.

An image-object volume relationship in holography for applications in quantitative particle fields is determined in terms of known physical parameters. The general relationships are described for collimated, point reference, or reconstruction sources. Some relevant methods for correlating the transverse magnification at different longitudinal distances are also described.

Simple approach to process speckle-photography data.

A simple approach to incorporate the effect of the variation in diffraction halo intensity on Young's fringes in speckle photography is described. Detailed solutions for the shifts in maxima and minima positions are presented for the case of double exposure.