The use of multitaper estimates for spectral proper orthogonal decomposition (SPOD) is explored. Multitaper and multitaper-Welch estimators that discrete prolate spheroidal sequences (DPSS) as data windows are compared to the standard SPOD algorithm exclusively relies on weighted overlapped segment averaging, or Welch's method, estimate cross-spectral density matrix. Two sets turbulent flow dat...

The idea of software defined radio was proposed by J. Mittola. It was a radio designed on programmable chips. The idea of SDR was further enhanced in the form of Cognitive radios. It was proposed by the J.Mittola for the solution of the Spectrum Scarcity problem. Cognitive Radio based networks have the two types of users. One type of the users is known as primary users and the other are known a...

(Minneap) 25: 483-485, 1975 13. Welch KMA, Chabi E, Buckingham J et al: Catecholamine and 5-hydroxytryptamine levels in ischemic brain. Influence of pchlorophenylalanine. Stroke 8: 341-346, 1977. 14. Welch KMA, Wang T-PF, Chabi E: Ischemia-induced seizures and cortical monoamine levels. Ann Neurol 3: 152-155, 1978 15. Brown RM, Carlson A et al: Effect of ischemia on monoamine metabolism in the ...

The Welch Bound is a lower bound on the root mean square cross correlation between n unit-norm vectors f1, ..., fn in the m dimensional space (Rm or Cm), for n ≥ m. Letting F = [f1|...|fn] denote the m-by-n frame matrix, the Welch bound can be viewed as a lower bound on the second moment of F , namely on the trace of the squared Gram matrix (F ′F ). We consider an erasure setting, in which a re...

The profile hidden Markov model (PHMM) is widely used to assign the protein sequences to their respective families. A major limitation of a PHMM is the assumption that given states the observations (amino acids) are independent. To overcome this limitation, the dependency between amino acids in a multiple sequence alignment (MSA) which is the representative of a PHMM can be appended to the PHMM...

William H. Welch and William T. Sedgwick, two of the founding fathers of American public health, were both early generation "Hopkins Men." Sedgwick was part of the first group of graduate students to attend Johns Hopkins University, and Welch was part of the initial faculty at the University's medical school. While they never worked together as colleagues at Hopkins, both became interested in t...