In this paper, we propose a super-resolution (pixel grid refinement) method for digital images. It is based on the linear filtering of zero-padded discrete signal. We introduce continuous-discrete observation model to create reconstruction system. The proposed typical real-world imaging systems - an initially continuous signal first undergoes (dynamic) distortions and then subjected sampling ef...

Results of a recent experimental study challenge the widely-held belief that modern combat helmets are more effective at protecting soldiers against concussions. The research shows used during First World War without inner paddings may have an advantage in soldiers’ brains from concussions when relying solely on cerebrospinal fluid. present explains this counterintuitive finding by revealing wh...

The present study compared the performance of soldier pile and concrete bearing pad anchored wall facings. Using Abaqus finite element software, two case studies have been precisely represented for the facing designs and effects of the parameters of soil type, spacing of anchors and facings, surcharge and facing sizes were investigated. The analysis results indicate that the soldier pile method...

A differential detection scheme for space-time spreading with two transmit antennas is proposed. The scheme does not require channel state information at either the transmitter or the receiver. With segmentation and preamble symbols padded at the transmitter, the receiver recovers the information using differential detection. Both phase-shift keying (PSK) and quadrature amplitude modulation (QA...

Safe-Tcl is a mechanism for controlling the execution of programs written in the Tcl scripting language. It allows untrusted scripts (applets) to be executed while preventing damage to the environment or leakage of private information. Safe-Tcl uses a padded cell approach: each applet is isolated in a safe interpreter where it cannot interact directly with the rest of the application. The execu...

We propose a simple solution to the uncertain delay problem in USRP (Universal Software Radio Peripheral)based SDR (Software-Defined Radio)-radar systems. Instead of time-synchronization as employed in (pseudo-) passive radar configurations, which require two or more synchronized receivers, we use direct reception (antennato-antenna) signal in a single receiver system as a reference to the exac...

This paper shows preimage attacks against reduced SHA-1 up to 57 steps. The best previous attack has been presented at CRYPTO 2009 and was for 48 steps finding a two-block preimage with incorrect padding at the cost of 2 evaluations of the compression function. For the same variant our attacks find a one-block preimage at 2 and a correctly padded two-block preimage at 2 evaluations of the compr...

A novel multiuser-interference (MUI)-free code division multiple access (CDMA) transceiver for frequency-selective multipath channels is developed in this paper. Relying on chip-interleaving and zero padded transmissions, orthogonality among different users’ spreading codes is maintained at the receiver even after frequency-selective propagation. As a result, deterministic multiuser separation ...

Multiple description coding (MDC) by sequence undersampling can be implemented by preand post-processing, so it can be associated to most standards for image/video communications. Unfortunately, this method suffers from high side distortion when only one description is received. In order to overcome this limitation, over sampling of sequence via zero padding in the DFT domain has been proposed ...

Recently we have defined Staircase-Generator codes (St-Gen codes) and their variant with a random split of the generator matrix of the codes. One unique property of these codes is that they work with arbitrary error sets. In this paper we give a brief overview of St-Gen codes and the list decoding algorithm for their decoding. We also analyze the semantic security against chosen plaintext attac...