Of the 110 000 to 180 000 hectares per year on which prescribed burning has recently been conducted in Canada, 70 000 to 150 000 hectares per year (mostly in British Columbia) has been burned for vegetation management purposes. Such purposes include silviculture, control of plant parasites, promotion of desirable plant species, and conservation of natural ecosystems. The emphasis of prescribed ...

Merchant fees and reward programs generate an implicit monetary transfer from “cash” users to credit card users because merchants generally do not set differential prices for card users to recoup the costs of merchant fees. On average, each cash-using household transfers $50 to households that use credit cards, and each credit card using household receives a subsidy of $240 every year. Among ca...

More than 170 000 new cases and 150 000 deaths have occurred in 2003 in US owing to lung cancer, which is the leading cancer death reason for men in US. Non-small cell lung cancer (NSCLC) accounts for about 80% of all lung cancers [1, 2]. Despite the progress in imaging and diagnostic procedures, non-small cell lung cancer (NSCLC) usually presents as advanced (locally or more frequently dissemi...

When former UN secretary-general Kofi Annan was seen leaving a conference in Geneva in November 2005 clutching maps of the south Asia earthquake disaster, it was evidence that satellites – as a key weapon in humanitarian emergencies – had arrived. In the hours and days after the October 8 quake struck killing more than 73 000 people and injuring some 150 000, experts from France, Germany, the U...

Platelets are anucleate cells in the blood at concentrations of 150 000–400 000 cells μl−1 and play a key role in hemostasis. Several studies have suggested that platelets contribute to cancer progression and cancer-associated thrombosis. In this review, we provide an overview of the biochemical and biophysical mechanisms by which platelets interact with cancer cells and review the evidence sup...

Young people aged five to 17 with covid-19 are less likely report fever, persistent cough, or appetite loss than adults, according a UK study of more million people. The latest findings from the ongoing React-1 study, which involves swab testing 150?000 randomly selected in England each month, found that symptoms varied age. Researchers examined tests and questionnaires between June 2020 Janua...

OBJECTIVES The aim of this study was to examine the impact of transient ischaemic attack (TIA) service modification in two hospitals on costs and clinical outcomes. DESIGN Discrete event simulation model using data from routine electronic health records from 2011. PARTICIPANTS Patients with suspected TIA were followed from symptom onset to presentation, referral to specialist clinics, treat...

B etween 15–20% of cases of brain infarction involve patients under the age of 55 years—that is, 150 000 to 200 000 patients each year in Europe. The main causes include cardiac valve disease and dissections of extracranial arteries (accounting for up to 20% of cases). In this age range, rare causes of arteriopathies may be found more frequently than in older stroke patients. Their mechanism is...

We have discovered lines of highly ionized fluorine (F  and F ) in the far-UV spectra of extremely hot (Teff=85 000–150 000 K) post-AGB stars. Our sample comprises H-rich central stars of planetary nebulae as well as H-deficient PG1159 stars. We performed non-LTE calculations and find strong F overabundances (up to 10−4 by mass, i.e., 250 times solar) in a number of PG1159 stars, while F is ...