Postdecision exposure to relevant information.

"Readership of auto advertising by new and old car owners was investigated in order to test some predictions of Festinger's theory of dissonance concerning selective exposure to information following decisions. It was found that new car owners read advertisements of their own car more often than of cars they considered but did not buy and other cars not involved in the choice. These selective tendencies in readership were much less pronounced among old car owners. This finding supports the theoretical derivation that persons in general seek out consonant or supporting information after an important decision in an attempt to reduce dissonance resulting from it." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Improved PAPR Reduction Using Gamma Correction in SC-FDMA Systems Under Multipath Fading Channels

Wireless Personal Communications - Single-carrier frequency division multiple access (SC-FDMA) has become one of the most attractive standards for next-generation wireless communication systems....     

Maximising performance of optical coherence tomography systems using a multi-section chirped quantum dot superluminescent diode

Key device requirements for maximising resolution in an optical coherence tomography system are discussed. The design and operating parameters of a multi-contact quantum dot superluminescent diode incorporating a number of features which inhibit lasing are described. Such devices allow the independent tuning of emission power and spectral shape; hence the penetration depth and resolution in optical coherence tomography are decoupled. The emission spectrum of a device utilising chirped quantum dots is shown to be tuned to produce a broadband single Gaussian emission, centred at the required wavelength of 1050 nm, with high output powers than a single contact device.     

Error Rate Analysis of Uplink MC-CDMA Systems using Complementary Codes in Rayleigh Fading Channels

Cloud computing is a global technology for data storage and retrieving. Many organizations are switching their companies to cloud technology, so that they can lease cloud services for use on a membership or pay as you go basis rather than creating their own systems. Cloud service provider and the Cloud service accessibility are the two major problems in cloud computing. The Economic Denial of Sustainability (EDoS) attack is an important attack towards the cloud service providers. The attackers may send continuous requests to the cloud in a particular second. Hence the legitimate user cannot access the data due to heavy cloud traffic. Hence the paid user cannot access the data. However, this problem makes an economical issue to the users. So this paper presented a new technique as, ADS-PAYG (Attack Defense Shell- Pay As You Go) approach using Trust Factor method against the EDoS attack is proposed to improve more number of authenticated users by fixing a threshold value. The algorithm produced an effective result based on response time, accuracy and CPU utilization. The ADS-PAYG solution is applied using MATLAB, which outperforms other Trust factor estimation methods and effectively distinguishes attackers from legitimate users. The detection accuracy is 83.43% for the given dataset and it is high when compared to the existing algorithms.

     

A Low Complexity Near Optimal Signal Detection for Large Scale MIMO SC-FDMA Uplink System

This article proposes an improved Newton algorithm as a low complexity signal detection scheme for linear receiver in large scale multiple- input multiple- output (LS-MIMO) single carrier frequency division multiple access (SC-FDMA) uplink system, where a large number of antennas are set up at the base station and active users are with a single antenna system. Data detection for uplink SC-FDMA system is one of the specific challenges due to the significant rise in the dimension of antennas and number of subcarriers. Especially for symbol detection process, LS-MIMO SC-FDMA system with linear detector requires to perform a large matrix inverse computation. Even though linear detectors such as zero forcing (ZF) and minimum mean square error (MMSE) can achieve near-optimal detection performance, they still introduce high computational complexity and obliviously involve in the computation of matrix inversion. Therefore, a design of complexity reduction algorithm based near-optimal detector for LS-MIMO SC-FDMA system attains research interest. The improved Newton algorithm is employed to obtain linear detection solution which iteratively performs matrix free-inversion operation. The new algorithm performs matrix–matrix multiplication into matrix–vector multiplication, which substantially reduces receiver detection complexity. The efficacy of the proposed method is investigated at 16-QAM. Both ZF and MMSE criteria are proposed and compared through simulations. Simulation results illustrate that the proposed scheme outperforms the conventional detection schemes and exhibits near-optimal performance with a small number of iterations. Further, bit-error-rate performance is closer to classical linear detector with affordable computational complexity.

     

Antimicrobial resistance in Neisseria gonorrhoeae in the United States, 1988-1994: the emergence of decreased susceptibility to the fluoroquinolones

Antimicrobial susceptibilities of Neisseria gonorrhoeae have been prospectively determined in the Gonococcal Isolate Surveillance Project of the Centers for Disease Control and Prevention. From 1988 through 1994, susceptibilities were determined for 35,263 isolates from 27 clinics. Patients were demographically similar to those in nationally reported gonorrhea cases. In 1994, 30.5% of isolates had chromosomally or plasmid-mediated resistance to penicillin or tetracycline. Penicillin resistance increased from 1988 (8.4%) to 1991 (19.5%) and then decreased in 1994 (15.6%). Tetracycline resistance decreased from 1988 (23.4%) to 1989 (17.3%) and then increased in 1994 (21.7%). Most isolates (99.9%) were highly susceptible to broad-spectrum cephalosporins. Isolates with decreased susceptibility to ciprofloxacin increased from 1991 (0.4%) to 1994 (1.3%); 4 isolates were ciprofloxacin-resistant. Ciprofloxacin-resistant strains may not respond to therapy with recommended doses of fluoroquinolones, and the clinical importance of strains with decreased susceptibility is unknown. The emergence of fluoroquinolone resistance in N. gonorrhoeae in the United States threatens the future utility of this class of antimicrobials for gonorrhea therapy.     

Keeping track of needs in communal and exchange relationships.

Two studies with 99 undergraduates examined the degree to which an individual will keep track of another's needs as a function of the type of relationship desired (communal or exchange) and perceived opportunity for the other to later reciprocate by keeping track of the S's needs (opportunity or no opportunity). Exp I tested the hypotheses that (a) when there is no opportunity for the other to reciprocate, keeping track of the other's needs will be greater if the person desires a communal rather than an exchange relationship with the other. (b) If the person desires an exchange relationship, keeping track of the other's needs will be greater when an opportunity for the other to reciprocate exists than when it does not. (c) If a communal relationship is desired, the existence of an opportunity for the other to reciprocate will not influence keeping track of the other's needs. Results support all 3 hypotheses. The 2nd experiment tested and found support for the hypothesis that even when nothing can be done to help the other, keeping track of the other's needs will be greater if a communal rather than an exchange relationship is desired. Overall findings support the view that keeping track of another person's needs differs depending on the type of relationship with the other person. (10 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)