نتایج جستجو برای: survival function
تعداد نتایج: 1505729 فیلتر نتایج به سال:
acknowledge the importance of e-commerce to their countries and to survival of their businesses and in creating and encouraging an atmosphere for the wide adoption and success of e-commerce in the long term. the investment for implementing e-commerce in the public sector is one of the areas which is focused in government‘s action plan for cross-disciplinary it development and e-readiness in go...
the weibull distribution has been widely used in survival and engineering reliability analysis. in life testing experiments is fairly common practice to terminate the experiment before all the items have failed, that means the data are censored. thus, the main objective of this paper is to estimate the reliability function of the weibull distribution with uncensored and censored data by using b...
The simsurv R package allows users to simulate survival (i.e., time-to-event) data from standard parametric distributions (exponential, Weibull, and Gompertz), two-component mixture distributions, or a user-defined hazard function. Baseline covariates can be included under proportional hazards assumption. Clustered event times, for example individuals within family, are also easily accommodated...
serotonin is believed as an important factor in brain function. the role of serotonin in cerebral psycho-patho-physiology has already been well established. however, the function of serotonin antagonist in anesthetized subjects under hyperthermia has not been studied properly. methods: experiments were performed in three groups of urethane-anesthetized rats, such as: (i) control group, (ii) who...
introduction: acute myeloid leukemia (aml) is a clonal disease characterized by heterogeneous involvement of hematopoietic bone marrow cell populations. in aml patients, a variety of clinical and biologic parameters, including surface markers, have been examinedfor potential value in predicting treatment response and survival. by checking the myeloid, lymphoid and nonspecific markers on the bla...
Background: Successful pregnancy in allopregnant women depends upon the control of graft rejection mechanisms. It has been suggested that some immunosuppressive cytokines contribute to successful pregnancy and transplantation. Transforming growth factor beta (TGF- β) exhibits potent immunoregulatory and anti-inflammatory properties which might prolong graft survival. Recent studies suggest a ...
Background: Several reports indicate that the probiotics can increase body resistance against malignant tumors. The aim of this study is to evaluate the effect of Lactobaci-llus reuteri Persian type culture collection (PTCC) 1655 in preventing tumor growth, improving weight and survival rate in mice with breast cancer.Methods: Twenty mice, the BALB/c at six weeks age, weighing approximately 17 ...
Selenium is an essential nutrient for physiological function, including immunity, Reproduction and nervous systems. This element as glutathione peroxidase enzyme cofactor, improve fish growth and propagation index via reducing of free radicals. In the present study, the effect of different levels of organic selenium were evaluated on some antioxidant indices, such as total antioxidant capacity ...
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