In this paper a new patch-based digital signature (DS) is proposed. The proposed approach similar to steganography methods hides the secure message in a host image. However, it uses a patch-based key to encode/decode the data like cryptography approaches. Both the host image and key patches are randomly initialized. The proposed approach consists of encoding and decoding algorithms. The encodin...

A microfluidic platform for continuous synthesis of hydrogel microparticles with superparamagnetic colloids (SPCs) embedded at prescribed positions is described. The shape the cross-linked microparticle independently controlled by stop–flow lithography, whereas position trapped SPCs are dictated virtual magnetic moulds made 2D nickel patches facilitating trapping. spatial collectively function ...

Promoting biodiversity is a major issue in urban planning. Estimating the potential of patches landscape matrix often uses tools spatial analysis and ecology indices, especially large study areas. In this paper, we present construction composite index (CBPI) based on structural functional approaches ecology. The CBPI composed eight indices (quality: permeability, fragmentation, environmental ma...

The present study was undertaken to develop a suitable transdermal matrix patch of Metoprolol tartrate with different proportions of polyvinyl pyrrolidone (PVP) and chitosan crosslinked with glutaraldehyde (GA). The prepared transdermal patches were subjected to different physicochemical evaluations such as thickness, tensile strength, folding endurance, drug content, swellability, surface pH, ...

Urban environments present unique challenges for landscape designers wishing to incorporate wildlife attractants into their designs. Cities such as Tucson, Arizona that are surrounded by relatively large expanses of native vegetation provide many opportunities for effectively enticing native wildlife into urban spaces. Patches of landscape can be designed that mimic vegetation composition found...

Mashhad City, according to the latest official statistics of the country is the second populated city after Tehran and is the biggest metropolis in the east of Iran. Considering the rapid growth of the population over the last three decades, the city’s development area has been extended, significantly. This significant expansion has impacted natural lands on suburb and even some parts e.g. rang...

We present a method to automatically segment indoor scenes by detecting repeated objects. Our algorithm scales to datasets with 198 million points and does not require any training data. We propose a trivially parallelizable preprocessing step, which compresses a point cloud into a collection of nearly-planar patches related by geometric transformations. This representation enables us to robust...

Sparse Filtering is a popular feature learning algorithm for image classification pipelines. In this paper, we connect the performance of Sparse Filtering in image classification pipelines to spectral properties of the corresponding feature matrices. This connection provides new insights into Sparse Filtering; in particular, it suggests stopping Sparse Filtering early. We therefore introduce th...

The type of matrix, the landscape surrounding habitat patches, may determine the distribution and function of local populations. However, the matrix is often heterogeneous, and its various components may differentially contribute to metapopulation processes at different spatial scales, a phenomenon that has rarely been investigated. The aim of this study was to estimate the relative importance ...