this study was designed to elucidate the effect of ascorbic acid on salivary total antioxidant capacity in smokers. in this single blind crossover clinical trial, the whole unstimulated saliva of 30 smokers, who were randomly divided into two groups, was collected. in the first phase after the saliva collection, one group of patients took 500 mg of vitamin c powder, for 3 weeks. then, saliva of...

Abstract— In this paper, a channel that is contaminated by two independent Gaussian noises S ∼ N (0, Q) and Z0 ∼ N (0, N0) is considered. The capacity of this channel is computed when independent noisy versions of S are known to the transmitter and/or receiver. It is shown that the channel capacity is greater then the capacity when S is completely unknown, but is less then the capacity when S i...

The performance loss due to separation of detection and decoding on the binary-input Gaussian CDMA channel is calculated in the large system limit. It is shown that a previous result in [1] found for Gaussian input alphabet holds also for binary input alphabet.

We define a class of symmetric discrete memoryless multiple-access channels. This definition incorporates previous definitions of symmetry for single user channels and is characterized by the optimality of the uniform distribution with respect to total channel capacity. We further identify a sub-class of channels in which channel symmetry is a direct result of a transposition symmetry in the tr...

background: community-based participatory research (cbpr) increasingly is being used to address health issues. few evidence exist to indicate how builds the capacity of communities to function as health promoter and what resources are required to promote successful efforts. this article presents the result of a capacity assessment for preventing drug abuse through cbpr, which working with rathe...

in order to improve the reliability of the power system, sufficient amount of new capacity should be installed in the network. usually generation units’ payoff in an energy market is not adequate to cover their expenses. therefore, energy only market cannot induce investors to invest in generation field. due to energy only market inefficiency, a supplementary algorithm is suggested to cover the...

'Capacity building' is the objective of many development programmes and a component of most others. However, satisfactory definitions continue to elude us, and it is widely suspected of being too broad a concept to be useful. Too often it becomes merely a euphemism referring to little more than training. This paper argues that it is more important to address systemic capacity building, identify...

We consider flat-fading multiple antenna channels with t transmit and r receive antennas, which is modeled by an r × t complex matrix H . The first n eigenvectors of H†H , where 0 ≤ n ≤ min(t, r), are assumed to be available at the transmitter as partial spatial information of channel. A transmission method was proposed which enables better use of the multiple-input multiple-output (MIMO) chann...

This paper presents measured data from a narrowband multiple-input multiple-output (MIMO) channel probe in an indoor office/laboratory environment. The system employs ten transmit and ten receive antennas and computes the 10 10 narrowband channel matrix at 2.45 GHz every 80 milliseconds. We use the data to study the statistical behavior of the channel coefficients and the resulting channel capa...