Compression molding of glass optics is gradually becoming a viable fabrication technique for high precision optical lenses. However, refractive index variation was observed in compression molded glass lenses, which would contribute to image quality degradation. In this research, annealing experiments were applied to control the refractive index variation in molded glass lenses. The refractive i...

A new color image watermarking algorithm with resistance to JPEG lossy compression based on Quantization Index Modulation (QIM) is proposed in this paper. As it is known, QIM method can achieve a good balance between the embedding bit rate, robustness and distortion between the original image and the composited image by modulating the source signal into different clusters. The corresponding DCT...

In this paper, the authors present a description of a new Web search engine model, the compressed index-query (CIQ) Web search engine model. This model incorporates two bit-level compression layers implemented at the back-end processor (server) side, one layer resides after the indexer acting as a second compression layer to generate a double compressed index (index compressor), and the second ...

The direct compression suitability of active pharmaceutical ingredients could be studied by SeDeM diagram method. Cefuroxime axetil (CfA) and paracetamol (PCM) were employed for SeDeM studies as these powders are well-characterized and known to be particularly difficult with respect to flowability and compactibility. Twelve different selected pharmacotechnical parameters were determined experim...

In this paper we present a description of a new Web search engine model, namely, the compressed index-query (CIQ) Web search engine model, which incorporates two bit-level compression layers implemented at the back-end processor (server) side, one layer resides after the indexer acting as a second compression layer to generate a double compressed index (index compressor), and the second layer r...

One problem noted recently with the diagnosis-related group payment system is that the distribution of Medicare case weights and case-mix indexes are compressed; that is, the payment rates for high-cost procedures are too low and those for low-cost procedures are too high. Despite the attention compression has received, there are no direct estimates of its magnitude or importance. Presented in ...

geotechnical investigations of waste fills are rarely undertaken, and consequently the geotechnical community has little knowledge of their engineering properties. in this study, a geotechnical testing program was conducted to evaluate the engineering properties of old municipal solid waste sampled in whamyung msw landfill site, busan, korea. the conducted tests included water content, specific...

Laser-based photo-thermal therapies can provide minimally-invasive treatment of cancers. Their effectiveness is limited by light penetration depth in tissue due to its highly scattering properties. The highly disordered refractive index distribution in tissue leads to multiple-scattering of incident light. It has been hypothesized that mechanical compression has a great potential to enhance the...

The study has been carried out with two broad objectives – to observe the effect of crude oil contamination on consolidation properties of soil and to predict the change in the properties in the form of mathematical correlation. The properties studied here are co efficient of compression (Cv) and compression index (Cc). Four types of naturally available soil (CH, CL, CI and SC) collected from d...

Les index bitmaps sont souvent utilisés pour indexer des données multidimensionnelles. Ils utilisent principalement l’accès séquentiel aux données, tant à l’écriture qu’à la lecture. Les bitmaps peuvent être compressés pour réduire le coût des entrées/sorties tout en minimisant l’utilisation du microprocesseur. Les techniques de compression les plus efficaces sont fondées sur la compression par...