Spectrum sensing is a critical part in Cognitive radio networks to detect the available frequency resources, and its timeliness accuracy are extremely important. The conventional detectors usually fail be robust presence of noise uncertainty, hence an asynchronous cooperative spectrum approach based on sequential probability ratio detection fuzzy hypothesis testing proposed. In approach, done b...

In this paper, we aim to discover more spectrum opportunities in limited sensing delay. We construct a MAC-layer sensing framework for fast discovery of spectrum opportunities. Specifically, we employ the sequential probability ratio test and develop a collaborative sensing scheme for multiuser to collaborate during multi-slot. Moreover, we propose a novel adaptive scheduling of collaborative s...

There is a spectrum of cardiac malformations known as “ Cono Truncal Anomalies “ which refl ect an abnormal transfer during development of the aorta from the right to the left ventricle. R H Anderson proposed a system of nomenclature and classifi cation of Congenital Heart Disease totally descriptive with sequential-segmental analysis according to the sequential approach of R.Van Praagh [1-2]. ...

tetracyclines (tcs) are broad-spectrum antibiotics that are used widely in veterinary medicine. the present study was carried out to trace the residues of oxytetracycline (otc) and tetracycline (tc) in pasteurized milk that is marketed in tehran with the use of a high performance liquid chromatography (hplc). ninety milk samples were collected during five sequential days from the products of si...

OBJECTIVE Dopaminergic and serotonergic modulation potently influences the sequential organization of rat movements in a simple unconditioned motor paradigm. Rats reared in social isolation post-weaning differ profoundly from their socially reared litter mates on behavioral, neurochemical, and neuroanatomical measures. This investigation examined (1) whether social isolation significantly affec...

Four sequential extended-spectrum beta -lactamase-producing isolates of Klebsiella pneumoniae were obtained from a patient after treatment with ertapenem and cultured. The first and fourth isolates were susceptible to ertapenem, whereas the second and third were resistant. All 4 isolates belonged to the same strain and produced a group 1 CTX-M enzyme; additionally, the resistant isolates had lo...