Exposure to constant light causes extensive rod photoreceptor damage but spares the photopic system in albino rats. The rod branch of the dark-adaptation curve shows considerable elevation in threshold; the cone branch is hardly affected. Longer exposure and chromatic adaptation suggest that there are three cone mechanisms with peaks near wavelengths of 450,520, and 560 nanometers.

This paper deals with machine repair problem with balking and reneging. There is provision of mixed standby (warm and cold) components to replace the failed machines. The lifetime and repair time are assumed to have exponential distribution. Birth-death technique is suggested to obtain the queue size distribution in explicit form. A repair facility of C permanent repairmen is facilitated to rep...

Even though neurofibromatosis ( NF) is not a rare neurological disorder, but there is few studies regarding  the relationship between  NF and psychological disorders. A 14 year old girl with NF type 1 associated  with multiple cerebral lesions was admitted in psychiatric ward due to restlessness , hypertalktiveness aggressive behavior, and flight of idea. Psychiatric diagnosis, based on DSM IV ...

Unexpected system failures pose significant problems in power industry and most manufacturing companies. In some cases, a critical component failure can incur catastrophic events and huge economic loss. To maintain machines at high level of reliability, some companies perform time-based preventive maintenance or age-based preventive maintenance to avoid sudden failure of machines. Usually, prev...

A posterolateral thoracotomy incision which spares the latissimus dorsi and serratus anterior muscles and provides adequate exposure for major thoracic procedures and structures in the posterior hilum is described. Preservation of these accessory muscles of respiration results in improved respiratory dynamics, decreased postoperative pain, and early recovery.

We describe an unusual electrocardiographic (ECG) case of an alternating P-wave configuration that spares other ECG components. Hyponatremia due to chronic indapamide use was proposed as a plausible cause of this ECG phenomenon because its correction led to the recovery of a steady P-wave morphology.

Twenty-four members of a family with benign familial chorea underwent testing for evidence of intellectual impairment. Lower verbal intelligence was found in affected individuals compared to unaffected family members, as were deficits in verbal abstract concept formation. These results challenge the notion that benign familial chorea uniformly spares the intellect in all kindreds.

This paper deals with cost – effective optimum design of parallel redundant system. The components in the redundant system are assumed to be identical and failure time follows exponential distribution. This paper suggests optimal spares (S*) required for redundant configuration in parallel redundant system. The results are presented for common cause failures with fault coverage.