Results 221 to 230 of about 308,152 (267)

Potential Hazard of Two Functioning Pacemakers

Chest, 1972
A patient with the bradycardia-tachycardia syndrome received a permanent ventricular inhibited demand pacemaker as well as a standby temporary transvenous pacemaker. When ventricular premature beats were seen, the temporary pacemaker was activated at 135 beats/min.
L, Gould, R F, Gomprecht
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Hazard rate function in dynamic environment

Reliability Engineering & System Safety, 2014
Abstract The hazard rate function is always applied to make maintenance policy, and the usual hazard rate function is computed by the data of failure times of systems working in constant environment, thus for systems working in dynamic environment it cannot be directly applied.
Xiaofei Lu 0001, Min Liu
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March Myoglobinemia: A Hazard to Renal Function

Journal of Urology, 1983
Serum muscle enzyme levels, myoglobin levels, and renal function were measured in a group of 20 army recruits who had volunteered for a prolonged period of primary, specially designed, gradual training. Blood samples were taken before training and before and after each hike. Levels of serum myoglobin, creatinine phosphokinase, lactic dehydrogenase, and
I, Melamed, Y, Romem, G, Keren, Y, Epstein, E, Dolev   +4 more
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Hazard function estimation with nonnegative “wavelets”

Statistics & Probability Letters, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Angers, Jean-Francois, MacGibbon, Brenda
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On Proportional Hazard Functions

Technometrics, 1970
The purpose of this note is to establish and make precise the following proposition: The minimum of independent random variables X and Y is independent of the event X x) if P(X = x ...
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Antigenic diversity thresholds and hazard functions

Mathematical Biosciences, 1997
In this paper, we answer some points made in a recent paper by N.I. Stilianakis and coworkers on the antigenic diversity threshold model for acquired immune deficiency syndrome pathogenesis. An extended version of the model is then used to compute hazard functions for the human immunodeficiency virus incubation period that are in agreement with ...
May, Robert M., Stekel, Dov J., Nowak, Martin A.   +2 more
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Estimation of the Jump-Point in a Hazard Function

Economic Quality Control, 2003
Summary: We consider a piecewise constant hazard function with exactly one jump point, say \(\tau\). It uniquely determines an exponential distribution whose density features a discontinuity of the first kind at the change point \(\tau\). Assuming that \(\tau\) is the unknown parameter of interest, the maximum likelihood estimator is shown to be ...
Abdel-Aty, Yahia, Ferger, Dietmar
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Tests for Reversed Hazard Rate Function

Calcutta Statistical Association Bulletin, 2003
The reversed hazard rate Junction of a random variable, defined as tlw ratio of the density to its distribution function, plays an important role in analyzing left-censored data. In this paper we develop tests based on the empirical distribution function for an assigned reversed hazard rate function against a onesided alternative and two different ...
Nanda, Asok K., Paul, Prasanta
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Nonparametric estimation of discrete hazard functions

Lifetime Data Analysis, 1996
A smoothing procedure for discrete time failure data is proposed which allows for the inclusion of covariates. This purely nonparametric method is based on discrete or continuous kernel smoothing techniques that gives a compromise between the data and smoothness. The method may be used as an exploratory tool to uncover the underlying structure or as an
Tutz, Gerhard, Pritscher, Lisa
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Methods for comparing cumulative hazard functions in a semi‐proportional hazard model

Statistics in Medicine, 1992
AbstractGraphical methods based on the analysis of differences between log cumulative hazard functions are considered for a two‐group semi‐proportional hazard model which allows for interaction between treatments and covariates. Confidence procedures and test statistics that can be used to test for interaction and for main effects are developed.
D M, Dabrowska, K A, Doksum, N J, Feduska, R, Husing, P, Neville   +4 more
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