In recent years, many studies have been published on data collected from social media, especially microblogs such as Twitter. However, rather few of these studies have considered evaluation methodologies that take into account the statistically dependent nature of such data, which breaks the theoretical conditions for using cross-validation. Despite concerns raised in the past about using cross...

A nationwide epidemiological study included 3516 primary major lower limb amputations in diabetic patients, during the period 1982 to 1992. On this well defined diabetic amputee population the relative mortality (Standard Mortality Ratio, SMR) has been analysed. The mortality rate was found to be 8 times the expected during the first year following amputation. The relative mortality is higher f...

The hydrogeomorphology of the Vietnamese Mekong Delta (VMD) has been significantly altered by natural and anthropogenic drivers. In this study, spatiotemporal changes flow regime were examined analysing long-term daily, monthly, annual extreme discharges water levels from 1980 to 2018, supported further investigation sediment load (from 1960s 2015), river bathymetric data (in 1998, 2014 2017) d...

OBJECTIVE To estimate the prevalence of tuberculous infection (TI) in the health-care workers of a hospital over the course of a 20-year period and analyze the associated risk factors. SUBJECTS AND METHODS A cross-sectional, descriptive study of the workers of a general hospital from 1988 until 2007, using a tuberculin test (TT) and questionnaire. RESULTS 2,179 workers were studied (mean ag...

Hip fractures are an important public health issue. By the age of 90, 32% of women and 17% of men have suffered a hip fracture (Gallagher et al 1980). By the year 2050 there will be about 2.3 million annual hip fractures globally (Gullberg et al 1997). Unfortunately, outcomes after hip fracture are often poor (Marottoli et al 1992). If more effective rehabilitation strategies could be developed...

Building upon the work of Cover (1992), a sizeable literature has developed in which the asymmetry of money supply shocks has been empirically investigated. The bulk of this work has focused on post-Word War II data. Accordingly, we study this question with U.S. data from both the interwar period and a near 40-year pre-World War I period. We find strong evidence in favor of monetary shock asymm...

Methods: Reproductive data were collected from 20 Minnesota and Iowa breeding herds, covering a 7-year period from January 1, 1986–December 31, 1992. Natural mating was used in all herds during the study period. Females bred one, two, or three times during a single estrus were included in the study to compare fertility rates (conception rate, farrowing rate, and adjusted farrowing rate) and lit...

BACKGROUND Providing up-to-date estimates of cancer patient survival rates is an important task of cancer registries. A few years ago, a new method of survival analysis, denoted period analysis, was proposed to enhance the recency of long-term survival estimates. The aim of this paper is to provide a comprehensive empirical evaluation of the use of this method. METHODS Using data from the nat...

Red sea urchins (Strongylocentrotus Walters, 1992; Congdon et al., 1994; franciscanus) along the west coast of Ebert, 1998). There is also the need to North America, like most large sea understand the evolution of life histourchins in temperate waters worldries of species where long life tends to wide, are the focus of a commercially be an indicator of uncertainty in indiimportant fishery. In a...