The Steganography is used for secure communication of information by embedding information in a cover object. In this paper we propose Wavelet based Secure Steganography with Scrambled Payload (WSSSP). The Daubechies Lifting Wavelet Transform (LWT) is applied on cover image. The XD band is decomposed into upper and lower bands for payload embedding. The payload is segmented into four equal bloc...

We have searched for molecular hydrogen in damped Lyman-α (DLA) and subDLA systems at high redshift (zabs > 1.8) using UVES at the VLT down to a detection limit of typically N(H2) = 2×10 14 cm. Out of the 33 systems in our sample, 8 have firm and 2 have tentative detections of associated H2 absorption lines. Considering that 3 detections were already known from past searches, molecular hydrogen...

We test the multiscaling issue of diffusion-limited-aggregation (DLA) clusters using a modified algorithm. This algorithm eliminates killing the particles at the death circle. Instead, we return them to the birth circle at a random relative angle taken from the evaluated distribution. In addition, we use a two-level hierarchical memory model that allows using large steps in conjunction with an ...

We explore the possibility of resolving an image of a damped Lyα (DLA) system in absorption against an extended, diffuse background X–ray source. Typical columns of neutral hydrogen in DLA systems are high enough to block out up to ∼ 30% of the soft X–ray flux at an observed photon energy of 0.5 keV, and we find that ∼ 1% of the area of extended X–ray sources at z & 1 have their 0.5 keV flux re...

We report the detection, both in line and continuum emission, of a galaxy responsible for a damped Lyα absorption (DLA) system at z = 3.15 projected 2.3 from QSO 2233+131. The star formation rate implied by both the Lyα and restframe far-UV continuum is ∼ 7 M⊙ yr . The galaxy also shows no sign of an active nucleus and has blue colors, both consistent with it being observed early in its star fo...

Diffusion Limited Aggregation (DLA) has usually been studied in 2 dimensions as a model of fractal growth processes such as river networks, plant branching, frost on glass, electro-deposition, lightning, mineral deposits, and coral. Here the basic principles are extended into 3 dimensions and used to create, among other things, believable models of root systems. An additional innovation is a me...

Lambda lifting transforms local function deenitions in functional programming languages into global ones to facilitate their eecient implementation. When considered as a source-to-source transformation for an ML-style typed language, all published algorithms for lambda lifting break typability. We break down two representative lambda lifting algorithms into four elementary transformation steps,...

To solve the quick and accurate level-adjusting problem in the process of spacecraft precise mating, automatic leveling and equalizing hoist device for spacecraft is developed. Based on lifting point adjustment by utilizing XY-workbench, the leveling and equalizing controller by a self-adaptive control algorithm is proposed. By simulation analysis and lifting test using engineering prototype, v...

The rapid growth of visualization technologies and Cloud computing have opened a new paradigm for utilizing the existing resource pools for on-demand and scalable computing, which enables the workflow management system to meet quality-of-service (QoS) requirements of the applications. It becomes crucial for cloud customers to choose the best Cloud services in order to minimize the running costs...

Abstract In shipyards, blocks are controlled by connecting the crane and block with wires during erection. During lifting, if a is not carefully controlled, it will cause damage. Block lifting using operation performed controlling number of wires, hooks, equalizers. Consequently, predicting stable difficult. this study, we proposed control method to determine static equilibrium. Initially, an a...