The traditional α-factor model has focused on the occurrence frequencies of common cause failure (CCF) events. Global α-factors in the α-factor model are defined as fractions of failure probability for particular groups of components. However, there are unknown uncertainties in the CCF parameters estimation for the scarcity of available failure data. Joint distributions of CCF parameters are ac...

Given samples from an unknown multivariate distribution p, is it possible to distinguish whether p is the product of its marginals versus p being far from every product distribution? Similarly, is it possible to distinguish whether p equals a given distribution q versus p and q being far from each other? These problems of testing independence and goodness-of-fit have received enormous attention...

Practical applications that employ entropy coding for large alphabets often partition the alphabet set into two or more layers and encode each symbol by using some suitable prefix coding for each layer. In this paper, we formulate the problem of finding an alphabet partitioning for the design of a two-layer semi-adaptive code as an optimization problem, and give a solution based on dynamic prog...

BACKGROUND Congestive cardiac failure (CCF) has emerged as a major public health problem worldwide and imposes an escalating burden on the health care system. OBJECTIVE To determine the causes and mortality rate of CCF in the University of Port Harcourt Teaching Hospital (UPTH), south Nigeria, over a five-year period from January 2001 to December 2005. METHODS A retrospective study of CCF c...

Flavonoids, a major constituent of Cotinus coggygria (CC), have been reported to possess diverse biological activities, including antigenotoxic and hepatoprotective effects; however, few studies have investigated the biological activity of the total flavonoids of Cotinus coggygria, especially in terms of its cytotoxicity in cancer cells. In the present study, the Cotinus coggygria flavonoids (C...

Global demand for Low-Alcohol Beer (LAB) and Alcohol-Free (AFB) has surged due to flavor attributes, health benefits, lifestyle changes, prompting efforts process intensification. This paper aims offer a detailed modelling basis LAB manufacturing study optimisation. A first-principles dynamic model conventional beer been re-parameterized used simulation of Cold Contact Fermentation (CCF), an ef...

A cardiac catabolic factor (CCF) has been partially purified from serum-free medium conditioned by minced porcine heart valves. CCF was prepared by a series of chromatographic techniques and compared directly with porcine synovial catabolin purified by the same protocol. CCF displayed a somewhat higher molecular weight (Mr 21,000) and isoelectric point (pI 5.2) than did synovial catabolin (Mr 1...

We consider preemptive online scheduling algorithms to minimize the total weighted/unweighted flow time plus energy for speed-scalable heterogeneous multiprocessors. We show that the well-known priority scheduling algorithms Highest Density First, Weighted Shortest Elapsed Time First, and Weighted Late Arrival Processor Sharing, are not O(1)-speed O(1)-competitive for the objective of weighted ...

During the multistage fracturing of shale gas horizontal wells, casing damage frequently occurs, making it essential to evaluate stress and deformation. This paper establishes a mathematical model thermo-hydro-mechanical coupling finite element casing-cement sheath-formation (CCF). examines effects temperature, thickness, nonuniform in situ stress, mechanical properties cement sheath, treating ...

Direct carotid-cavernous fistula is an abnormal arteriovenous communication between the carotid artery and the cavernous sinus occurring spontaneously or following head trauma. The aim of this paper is to report our experience and a review of the literature regarding the curative effect of endovascular treatment for patients with post-traumatic direct CCF. We present five patients with direct p...