In this paper, the estimation of doubly spread underwater acoustic (UWA) channels is investigated. The UWA channels are characterized by severe delay spread and significant Doppler effects, and can be well modeled as a multi-scale multi-lag (MSML) channel. Furthermore, exploiting the sparsity of UWA channels, MSML channel estimation can be transformed into the estimation of parameter sets (ampl...

This paper is concerned with the performance of Orthogonal Matching Pursuit (OMP) algorithms applied to a dictionary D in a Hilbert space H. Given an element f ∈ H, OMP generates a sequence of approximations fn, n = 1, 2, . . ., each of which is a linear combination of n dictionary elements chosen by a greedy criterion. It is studied whether the approximations fn are in some sense comparable to...

Benzisothiazolone (BIT), N-methylisothiazolone (MIT) and 5-chloro-N-methylisothiazolone (CMIT) are highly effective biocidal agents and are used as preservatives in a variety of cosmetic preparations. The isothiazolones have proven efficacy against many fungal and bacterial species including Pseudomonas aeruginosa. However, some species are beginning to exhibit resistance towards this group of ...

Since Pollack (1) first noticed the urinary excretion of pyramine following in jection of 100mg of thiamine, several investigators (2, 3) have reported a similar finding. Pyramine was assumed by Mickelson (4-6) to be 2, 5-dimethyl-4aminopyrimidine or some compound related to it. Makino et al., on the other hand, have shown in mice and rats that a com pound with a similar structure, 2-methyl-5-h...

The neonatal opossum (Monodelphis domestica) was used to assess how different populations of cells are generated in the olfactory region, and how they migrate along pathways to the central nervous system. Developing nerve cells were immunocytochemically labelled using antisera directed against two specific markers of olfactory receptor neurones: olfactory marker protein (OMP) and the dipeptide ...

The total number of olfactory receptor neurons (ORNs) in the rat main olfactory epithelium (MOE) was estimated using stereological sampling. Skulls and noses of newborn (postnatal day 0), young adult (8 weeks), and adult (6 months) rats were decalcified, embedded in paraffin, cut into 10-μm thick sections serially at 100-μm intervals, and processed for immunohistochemistry for olfactory marker ...

Leptospirosis, a disease with protean manifestations, is caused by Leptospira species complex. A definite diagnosis of leptospirosis during the first week of the illness is a major challenge to investigating clinical laboratories. PCR is a rapid, sensitive and specific means of diagnosing Leptospira infections in the early phase of the disease. In this study, the applicability of routine PCR as...

The crystal structure of Bacillus subtilis orotidine 5'-monophosphate (OMP) decarboxylase with bound uridine 5'-monophosphate has been determined by multiple wavelength anomalous diffraction phasing techniques and refined to an R-factor of 19.3% at 2.4 A resolution. OMP decarboxylase is a dimer of two identical subunits. Each monomer consists of a triosephosphate isomerase barrel and contains a...

Direction of arrival (DOA) estimation is a sparse reconstruction problem. However, conventional orthogonal matching pursuit (OMP) may fail to identify the correct atoms since the redundant dictionary composed of the direction vectors is highly coherent. To mitigate the coherence problem, in this paper, we propose a modified OMP by constructing data dependent sensing dictionary for sparse recons...

In underwater, object information is received by sonobuoy. The sonobuoy generates object range and bearing measurements. Extended Kalman filter is utilized to process the noise corrupted measurements for generation of object motion parameters (OMP). OMP is communicated to the aircraft through a link namely ultra-high frequency link for further processing. Results obtained in the simulation are ...