Nonlinear optical absorption effect in KDP and 70%-DKDP crystals, which were grown by the conventional temperature cooling method, was systematically studied using picosecond pulse laser excitation. Using open aperture Z-scan measurements, the dependence of nonlinear absorption effect on sample orientations (I, II, and z) as well as laser intensity was systematically measured at λ = 1064 and 53...

We develop an approach of key distribution protocol (KDP) proposed recently by T. Aono et al. A more general mathematical model based on the use of Variable-Directional Antenna (VDA) under the condition of multipath wave propagation is proposed. Statistical characteristics of VDA were investigated by simulation, that allows us to specify model parameters. The security of the considered KDP is e...

This paper describes the development of a prototype knowledge discovery portal (KDP) for energy informatics. The research domain is Ireland which is increasingly challenged to achieve energy efficiency targets and to implement renewable energy systems (RES). The reasons for undertaken this research is to provide a mechanism to disseminate information on energy efficiency and renewable energy te...

In this second article in a two-part work, S-Pol polarimetric data collected during TiMREX (Terraininfluenced Monsoon Rainfall Experiment) is analyzed and used to infer the storm microphysics. Both simultaneous horizontal (H) and vertical (V) transmit polarization data and fast alternating H and V transmit polarization data are used in the analysis. Dual-Doppler synthesis and sounding data char...

Laser-induced damage at near operational laser excitation conditions can limit the performance of potassium dihydrogen phosphate (KH(2)PO(4), or KDP) and its deuterated analog (DKDP) which are currently the only nonlinear optical materials suitable for use in large-aperture laser systems. This process has been attributed to pre-existing damage precursors that were incorporated or formed during ...

The complete sequence of the kdp gene region of Clostridium acetobutylicum has been determined. This part of the chromosome comprises two small open reading frames (orfZ and orfY), putatively encoding hydrophobic peptides, and the genes kdpA, kdpB, kdpC, and kdpX, followed by an operon encoding a pair of sensor-effector regulatory proteins (KdpD and KdpE). Except for orfZ, orfY, and kdpX, all g...

Refractive indices for the crystals potassium dihydgrogen phosphate, potassium titanyl phosphate and potassium niobate are measured. Samples of KDP from different crystal growers had slightly different refractive indices. The refractive indices of KDP for ordinary rays are studied as a function of temperature. The temperature coefficient of the refractive indices has little dependence on the wa...

The modified strong dipole-proton coupling (MSDPC) model, which predicts several static and dynamic dielectric properties of KDP-type ferroelectrics, is used to investigate properties of paramagnetic center SeO4 introduced in KH2PO4 (KDP) and KD2PO4 (DKDP) lattice as a local probe in EPR experiment. Paramagnetic center is treated within MSDPC model as a “soft” impurity, with Aprobe value of the...

An X-band dual-polarization radar (XPRAD) was deployed in Guangdong province as part of the Southern China Monsoon Rainfall Experiment (SCMREX) during the storm season in 2016. This paper presents a comprehensive assessment of XPRAD observations during SCMREX with emphasis on data processing and rainfall products. The differential phase-based attenuation correction and radar calibration using s...

Potassium dihydrogen phosphate (KDP) and amino acids are non-linear optical material used for laser frequency conversion. The pure and amino acids (L-arginine, L-lysine and L-alanine) doped KDP crystals were grown by slow solvent evaporation technique. The amino acid doping was confirmed by CHN analysis, paper chromatography and FTIR studies. The (100) face of pure and amino acids doped KDP cry...