Dead On Arrival Research Articles

Effect of DOA spares on predicted system reliability (switching system)

The authors examine the effect of the initially defective probability, or as it is also known, the dead-on-arrival (DOA) probability, of spare circuit packs on the predicted reliability of a duplex system. A reliability model to incorporate the DOA probability and the associated spare-pack replacement time is developed. Calculations are made in an attempt to quantify the effect of these two variables on the predicted downtime of a representative duplex system. For the system used in this study, it is shown that if the DOA probability is 5% or more, the predicted downtime estimate is 70% greater than the estimate obtained using the standard assumption of a DOA probability of zero.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Ensuring Reliability of Avionics Systems

THE reliability of ICs and other semi‐conductors is a subject which continues to challenge both manufacturers and users. “High specification” markets such as the Avionics Sector, lead the user demand for a greater degree of assurance that the products they install demonstrate a longer and more effective life. The percentage of DOA (dead on arrival) components has become less but, nevertheless, Burn‐in of standard devices, or even re‐screening of those supplied as “high rel”, remain important activities in the manufacture of electronic assemblies — and a benefit to the user of the final product. Early failures, also known as “infant mortalities” and the concern for extended life in components, creates an element of worry in the minds of those companies whose products are required to provide high MBTFs, extended operational life and minimum risk of failure.

Clinical Study of Dead On Arrival Cases Carried to Emergency Center of Iwate Medical University

The 119 Patients with DOA (Dead on arrival) cases being carried to the Emergency Center of Iwate were analyzed retrospectively during 20 months from November, 1980.The following results were obtained.1. Among 119 patients, traumatic patients were 33, and nontraumatic were 86 patients.2. Of the 119, 102 patients were cardiopulmonary resuscitated. Resuscitation was successful in 24 (23%) who kept alive more 5 hours after resuscitatdon, and only 3 patients were discharged.3. Unsuccessful cases in resuscitation were 78 (76%). Of these, 8 patients survived 2 or 4 hours and remained 70 could not be resuscitated at all.4. In successful cases in resuscitation, the interval between arrest and beginning of resuscitation was 23.7±15.3 minutes and the mean resuscitation time was 22.7±21.9 minutes.5. In unsuccessful cases in resuscitation, the interval between arrest and beginning of resuscitation was 27.9±15.3 minutes and the mean resuscitation time was 35.5±21 minutes.

Acute Myocardial Infarction in Newark, NJ

The incidence of acute myocardial infarction (AMI) among urban blacks appears to be considerably less than that among whites. To evaluate this, all AMIs among Newark, NJ, residents in 1973 were evaluated, using the 1970 census for calculating age, race, and sex-specific rates. Death certificates of patients dead on arrival (DOA) from coronary heart disease (total 517) were also evaluated. Two hundred seventy-three AMIs were documented. Although crude rates per 100,000 population were higher for whites than for blacks, age-specific rates by decades from 20 to 80 revealed no differences. Coronary DOA rates were consistently higher among blacks than among whites, reaching approximately a 2:1 ratio in the older decades. The apparent rarity of AMI among Newark blacks is attributable to their relative youth compared to whites (77% under 40 vs 56%) and a higher out-of-hospital coronary death rate.

Dead on arrival

Dead on arrival

Dead on Arrival

Dead on Arrival