TOWARDS BUILDING A WORDNET NOUN ONTOLOGY

Abstract. WordNet, a lexical database for English that is extensively used by computational linguists, has not previously distinguished hyponyms that are classes from hyponyms that are instances. This work describes an attempt to draw this distinction and reports the way in which the results were incorporated in the last version (2.1) of WordNet

Predisposing conditions and outcome in adult patients with recurrent pneumococcal meningitis

Introduction: Recurrent pneumococcal meningitis is a relatively rare condition associated with predisposing factors. The objective of the study was to evaluate the characteristics and predisposing factors for recurrent pneumococcal meningitis in adults and compare them to patients with non-recurrent meningitis. Methods: A retrospective record review was performed of all patients hospitalized for pneumococcal meningitis in a large tertiary referral center, during a 10-year period. Results: We identified a total of 194 pneumococcal meningitis episodes in 182 patients. Thirty-eight (20%) meningitis episodes in 26 patients were recurrent. Anatomical defects and/or CSF leakage were present in 55% of recurrent pneumococcal meningitis vs. 10% of non-recurrent episodes (p<0.001). Impaired immune response was encountered in 41% non-recurrent meningitis vs 24% of recurrent episodes (p=0.02). Median age in patients with recurrent meningitis was 29 years, while patients with non-recurrent meningitis had a median age of 57 years (p<0.001). The in-hospital mortality was 3% in patients with recurrent meningitis vs 27% in patients with non-recurrent meningitis (p<0.001). An unfavorable outcome was more likely to occur in patients with advanced age and an impaired immune status. Conclusions: Patients with recurrent pneumococcal meningitis were younger, had less comorbidities and a better outcome

An Evaluation Exercise for Romanian Word Sense Disambiguation

This paper discusses an evaluation exercise for Romanian word sense disambiguation

Type-specific herpes simplex virus-1 and herpes simplex virus-2 seroprevalence in Romania: comparison of prevalence and risk factors in women and men

AbstractObjectiveTo determine herpes simplex virus (HSV)-2 and HSV-1 seroprevalence in women and men in Romania.MethodsA cross-sectional seroprevalence survey was conducted between 2004 and 2005 on a total of 1058 women and men representative of the population of Bucharest. All participants were aged 15–44 years and completed a structured questionnaire. A blood sample was collected to detect IgG anti-HSV-1 and HSV-2 serum antibodies using the HerpeSelect ELISA (Focus Diagnostics).ResultsA total of 761 women (median age 29 years) and 297 men (median age 29 years) were included. Overall, HSV-2 seroprevalence (15.2%) increased with age. Among women, HSV-2 seroprevalence increased from 11.0% in 15–19-year-olds to 38.3% in 40–44-year-olds. Among men, seroprevalence increased from 4.0% in 20–24-year-olds to 27.1% in 40–44-year-olds. HSV-2 seroprevalence was significantly higher among women than men (17.0% vs. 10.8%). HSV-1 seropositivity was high (87.2%) in all age groups, with no clear trend by age or by sex. In addition to older age and female sex, risk factors for HSV-2 included greater number of lifetime sexual partners, lower educational attainment, and history of genital vesicles. Lower educational level and rural residence were associated with a higher risk of HSV-1 seropositivity.ConclusionsIn Romania, HSV-2 seroprevalence was higher in women than men, and was within European limits and lower than that in Africa and the USA. In contrast, HSV-1 seroprevalence was generally higher than that previously recorded in similarly aged populations in Western Europe

Risk factors for treatment failure and mortality among hospitalized patients with complicated urinary tract infection: A multicenter retrospective cohort study (RESCUING study group)

Background. Complicated urinary tract infections (cUTIs) are responsible for a major share of all antibiotic consumption in hospitals. We aim to describe risk factors for treatment failure and mortality among patients with cUTIs. Methods. A multinational, multicentre retrospective cohort study, conducted in 20 countries in Europe and the Middle East. Data were collected from patients' files on hospitalised patients with a diagnosis of cUTI during 2013-2014. Primary outcome was treatment failure, secondary outcomes included 30 days all-cause mortality,among other outcomes. Multivariable analysis using a logistic model and the hospital as a random variable was performed to identify independent predictors for these outcomes. Results. A total of 981 patients with cUTI were included. Treatment failure was observed in 26.6% (261/981), all cause 30-day mortality rate was 8.7% (85/976), most of these in patients with catheter related UTI (CaUTI). Risk factors for treatment failure in multivariable analysis were ICU admission (OR 5.07, 95% CI 3.18-8.07), septic shock (OR 1.92, 95% CI 0.93-3.98), corticosteroid treatment (OR 1.92, 95% CI 1.12-3.54), bedridden (OR 2.11, 95%CI 1.4-3.18), older age (OR 1.02, 95% CI 1.0071.03-), metastatic cancer (OR 2.89, 95% CI 1.46-5.73) and CaUTI (OR 1.48, 95% CI 1.04-2.11). Management variables, such as inappropriate empirical antibiotic treatment or days to starting antibiotics were not associated with treatment failure or 30-day mortality. More patients with pyelonephritis were given appropriate empirical antibiotic therapy than other CaUTI [110/171; 64.3% vs. 116/270; 43%, p &lt;0.005], nevertheless, this afforded no advantage in treatment failure rates nor mortality in these patients. Conclusions. In patients with cUTI we found no benefit of early appropriate empirical treatment on survival rates or other outcomes. Physicians might consider supportive treatment and watchful waiting in stable patients until the causative pathogen is defined

WordNet nouns: Classes and instances

WordNet, a lexical database for English that is extensively used by computational linguists, has not previously distinguished hyponyms that are classes from hyponyms that are instances. This note describes an attempt to draw that distinction and proposes a simple way to incorporate the results into future versions of WordNet. If you were to say “Women are numerous, ” you would not wish to imply that any particular woman is numerous. Instead, you would probably mean something like “The class of women contains numerous instances. ” To say, on the other hand, “Rosa Parks is numerous, ” would be nonsense. Whereas the noun woman denotes a class, the proper noun Rosa Parks is an instance of that class. As Quirk et al. (1985, page 288) point out, proper nouns normally lack number contrast. This important distinction between classes and instances underlies the present discussion of WordNet nouns. Some nouns are understood to refer to classes; membership in those classes determines the semantic relation of hyponymy that is basic for the organization of nouns in WordNet (WN). Other nouns, however, are understood to refer to particular individuals. In many cases the distinction is clear, but not always