: Image compression may be lossy or lossless. Lossless compression is preferred for archival purposes and often for medical imaging, technical drawings, clip art, or comics. Lossy compression methods, especially when used at low bit rates, introduce compression artifacts. Lossy methods are especially suitable for natural images such as photographs in applications where minor (sometimes impercep...

The calculation of the local density of states (LDOS) in lossy materials has long been disputed due to the divergence of the homogeneous Green functionwith equal space arguments. For arbitrary-shaped lossy structures, such as those of interest in nanoplasmonics, this problem is particularly challenging. A nondivergent LDOS obtained in numerical methods such as the finite-difference time-domain ...

Absorber is an important component in various optical devices. Here we report a novel type of asymmetric absorber in the visible and near-infrared spectrum which is based on lossy Bragg stacks. The lossy Bragg stacks can achieve near-perfect absorption at one side and high reflection at the other within the narrow bands (several nm) of resonance wavelengths, whereas display almost identical abs...

This paper proposes an effective technique, which can detect malicious manipulations under video lossy compressing data (e.g. H.263) and still-image lossy compressing data (e.g. JPEG). A blockclassification strategy is used to divide DCT-blocks into the flat-blocks and the normal-blocks. Simple features of the both blocks are embedded invisibly. For later authentication, the watermarked frame i...

We consider a novel variant of $d$ -semifaithful lossy coding in which the distortion measure is revealed only to encoder and at run-time, as well an extension it constraint also run-time. Two forms rate redundancy are used analyze pe...

We have extended previous formulations of the wavepacket molecular dynamics (WPMD) by implementing full antisymmetrization for the electron-electron interaction and by introducing approximate Bloch waves to account for the periodic continuation of the simulation box. The improved antisymmetrization leads to a modified volume element in the Monte-Carlo (MC) sampling which serves to limit an unph...

The main objective of this paper is to provoke and stimulate debate on the health effects of long-term, low-level exposure of human populations to toxic metals. Over one billion (10(9)) human guinea pigs are now being exposed to elevated levels of toxic metals and metalloids in the environment. The number of persons suffering from subclinical metal poisoning is believed to be several million. A...

In this paper, we present a novel method for fast lossy or lossless compression and decompression of regular height fields. The method is suitable for SIMD parallel implementation and thus inherently suitable for modern GPU architectures. Lossy compression is achieved by approximating the height field with a set of quadratic Bezier surfaces. In addition, lossless compression is achieved by supe...

This paper evaluates four forwarding strategies for fragmented datagrams in the Internet of Things (IoT). We focus on classic end-to-end fragmentation, hop-wise reassembly, a minimal approach to direct fragments, and utilizing selective fragment recovery. To fully analyze potentials recovery, we include common congestion control mechanisms. compare all fragmentation comprehensively extensive ex...