In the present study, Energy Absorption Buildup Factor (EABF) and Exposure Factors (EBF) of CR-39 Trivex optical lenses are calculated by using Geometric Progression (GP) fitting method based on ANSI/ANS-6.4.3 database. The study analyses comprehensively for different penetration depths within energy range 0.015 - 15 MeV up to 40 mfp. buildup factors in examined materials depending photon that ...

Variable environments in ad hoc networks require a joint control of physical (PHY) and medium access control (MAC) layers resources in order to optimize performance. In this paper, we propose a framework to perform such cross-layer control and optimization. The PHY layer and cross-layer engine estimate and predict the channel variations to select the users that will meet the signal-to-interfere...

A high-speed DDR2, DDR2/3, or DDR3 DRAM interface for off-chip memory provides a powerful tool to meet the high-performance demands of new electronic products. However, with advancements come new challenges. The DDR DRAM high-speed interface between the system-on-chip (SoC) and off-chip memory requires specialty circuits. These circuits, often referred to as a physical layer (PHY), comprise hig...

Inequalities are derived for power sums of the real part and the modulus of the eigenvalues of a Schrödinger operator with a complexvalued potential. Work partially supported by the Swedish Foundation for International Cooperation in Research and Higher Education (STINT). Work partially supported by U.S. National Science Foundation grant PHY 01 39984. Work partially supported by U.S. National S...

We discuss the Chern-Simons theory in three-dimensional curved space-time in the vielbein formalism. Due to the additional presence of the local Lorentz symmetry, beside the diffeomorphisms, we will include a local gravitational supersymmetry (superdiffeomorphisms and super-Lorentz transformations), which allows us to show the perturbative finiteness at all orders. On leave from the Département...

UNLABELLED A successful approach for predicting functional associations between non-homologous genes is to compare their phylogenetic distributions. We have devised a phylogenetic profiling algorithm, SVD-Phy, which uses truncated singular value decomposition to address the problem of uninformative profiles giving rise to false positive predictions. Benchmarking the algorithm against the KEGG p...

The article describes hardware solutions for the IEEE 802.11 medium access control (MAC) layer and IEEE 802.11a digital baseband in an RF-MIMO WLAN transceiver that performs the signal combining in the analogue domain. Architecture and implementation details of the MAC processor including a hardware accelerator and a 16-bit MACphysical layer (PHY) interface are presented. The proposed hardware ...

Advanced forward error correcting (FEC) and modulation scheme basing on low-density parity-check codes (LDPC) and adaptive bit loading (ABL) procedure is investigated for WLAN physical layer (PHY) of IEEE 802.11a standard. The main intention of the present paper is to study influence of the advanced PHY algorithms on the WLAN throughput under the realistic deployment conditions, for which a har...

Cognitive Radio (CR) is another technology in which a framework can sense its surroundings and adjust to the new working parameters to improve the transmission quality. A flexile and versatile physical (PHY) layer is required to execute the previously stated capacities. In this paper the two spread spectrum procedures to be specific DSSS and FHSS are examined regarding how these meet the PHY la...

In the paper various PHY abstraction methods for both orthogonal and non-orthogonal systems are presented, which allow to predict the coded block error rate (BLER) across the subcarriers transmitting this FEC-coded block for any given channel realization. First the efficiency of the selected methods is investigated and proved by the means of computer simulations carried out in orthogonal mutica...