A real options model of resource extraction is considered where management controls both the extraction rates as well as the quality of extracted material earmarked for processing into final product. The minimum quality of material acceptable for processing is called the cutoff grade. If the cutoff is too high, much of the extracted material will go to waste exacting an opportunity cost. If the...

There is no consensus on the cutoff for positivity of estrogen receptor (ER) and progesterone (PR) in endometrial cancer (EC). Therefore, we determined value ER PR expression with strongest prognostic impact outcome. Immunohistochemical was scored as a percentage positive EC cell nuclei. Cutoff values were related to disease-specific survival (DSS) disease-free (DFS) using sensitivity, specific...

one of the most important goals of sugar beet cultivation is to achieve high seedling emergence and establishment under water deficit conditions. in this experiment irrigation of the seed bearing plants was cutoff in four periods of 750, 1000, 1250 and 1500 gdd after schtechlings were planted and the seeds were formed and grown under water stress. the experiment was carried out as a randomized ...

This study is to establish a predictive index (PI) model of 5-year survival rate for patients with hepatocellular carcinoma (HCC) after radical resection and to evaluate its prediction sensitivity, specificity, and accuracy.Patients underwent HCC surgical resection were enrolled and randomly divided into prediction model group (101 patients) and model evaluation group (100 patients). Cox regres...

AIM/BACKGROUND The purpose of this study was to evaluate the validity of 3 classifications for assessing liver function, the liver damage and Child-Pugh classifications and the newly proposed albumin-bilirubin (ALBI) grade, in order to examine the feasibility of evaluating hepatic function using ALBI grade with the hepatocellular carcinoma (HCC) treatment algorithm used in Japan. METHODS We a...

Operator cutoff regularization based on the original Schwinger's proper-time formalism is examined. By constructing a regulating smearing function for the proper-time integration, we show how this regularization scheme simulates the usual momentum cutoff prescription yet preserves gauge symmetry even in the presence of the cutoff scales. Similarity between the operator cutoff regularization and...

In this paper, we study a generalized version of the Weber problem finding point that minimizes sum its distances to finite number given points. our setting, these may be cut off at value [Formula: see text], and allow for option an empty solution fixed cost text]. We analyze under which circumstances problems can reduced simpler problem, also when definitely have solve more complex with cutoff...

BACKGROUND The basal pattern of p53 expression, defined as its immunoreactivity confined to the basal half of the glands, is associated with early neoplastic lesions in ulcerative colitis (UC). However, their clinical utility of this finding is limited by the use of "visual estimation" (approximate immunoreactivity on the basis of scanning the stained slide, without formal counting). This study...