Correlation of cortical blood flow as measured by a thermal diffusion flow probe (CBFp) with the direct cortical response (DCR) was studied in 48 lightly anesthetized cats with global ischemia. Thresholds for attenuation and loss of DCR were 21.3 +/- 4.7 and 8.7 and 3.4 ml/100 g/min respectively. In abrupt ischemia, CBFp of 0-3 ml/100 g/min produced absence of DCR in 6 min or less; however, at ...

BACKGROUND Dacryocystorhinotomy (DCR) is a common procedure used to treat nasolacrimal duct obstruction. The modern external DCR, in which the lacrimal sac is opened directly into the nasal cavity, was first described in 1904 by Toti. Since that time, DCR techniques have evolved, including a transnasal endoscopic approach that has gained popularity in parallel with the growth of endoscopic sinu...

5584 Background: To evaluate the outcomes of dacryocystorhinostomy (DCR) in patients with head and neck tumors. METHODS The clinical records of all 31 patients with head and neck tumors who underwent DCR for nasolacrimal duct blockage at M.D. Anderson Cancer Center between 1999 and 2003 were retrospectively reviewed for outcome and complications of DCR. RESULTS Nasolacrimal duct blockage wa...

In Drosophila melanogaster, the Dicer-2/R2D2 complex initiates RNA interference (RNAi) by processing long double-stranded RNA (dsRNA) into small interfering RNA (siRNA). Recent biochemical studies suggest that the Dcr-2/R2D2 complex also facilitates incorporation of siRNA into the RNA-induced silencing complex (siRISC). Here we present genetic evidence that R2D2 and Dcr-2 are both required for ...

We conservatively extend the declarative Dynamic Condition Response (DCR)Graph process model, introduced in the PhD thesis of the second author, to allowfor discrete time deadlines. We prove that safety and liveness properties can beverified by mapping finite timed DCR Graphs to finite state transition systems.We exemplify how deadlines can introduce time-locks and deadlocks and...

Dysregulated intracellular Ca(2+) signaling is implicated in a variety of cardiac arrhythmias, including catecholaminergic polymorphic ventricular tachycardia. Spontaneous diastolic Ca(2+) release (DCR) can induce arrhythmogenic plasma membrane depolarizations, although the mechanism responsible for DCR synchronization among adjacent myocytes required for ectopic activity remains unclear. We in...

The terrestrial carbon cycle is influenced by environmental variability at scales ranging from diurnal to interannual. Here, we present 5-years of growing season (day 131–275) observations of the carbon isotope ratio of ecosystem respiration (dCR) from a semiarid woodland. This ecosystem has a large necromass component resulting from 97% Pinus edulis mortality in 2002, is dominated by drought-t...

This paper examines error-control coding (ECC) use in wireless sensor networks (WSN), to determine the energy efficiency of specific ECC implementations in WSN. ECC provides coding gain, resulting in transmitter energy savings, at the cost of added decoder power consumption. This paper derives an expression for the critical distance dCR, the distance at which the decoder’s energy consumption pe...

Most of the workers have reported a very good success rate of dacryocystorhinostomy (DCR) operation. We have discussed the technique of re-operation in patients with previously unsuccessful DCR in our prospective study where 39 cases of failed DCR were operated. We have also determined the factors responsible for the failure of primary DCR and present the results of the management of failed cas...

If a graph embeds in a surface with k crosscaps, does it always have an embedding in the same surface in which every edge passes through each crosscap at most once? This well-known open problem can be restated using crossing numbers: the degenerate crossing number, dcr(G), of G equals the smallest number k so that G has an embedding in a surface with k crosscaps in which every edge passes throu...