The Arctic climate is changing. Permafrost is warming, hydrological processes are changing
and biological and social systems are also evolving in response to these changing …

At the close of the Fourth International Polar Year, we take stock of the ecological consequences
of recent climate change in the Arctic, focusing on effects at population, community, and …

COVID-19 presents significant social, economic, and medical challenges. Because COVID-19
has already begun to precipitate huge increases in mental health problems, clinical …

… These reflections interfere with the initial reflection off the CrI 3 flake to produce thin-film
interference that depends on the CrI 3 layer thickness, d 1 , as well as the SiO 2 thickness, d 2 . …

We present a new part-of-speech tagger that demonstrates the following ideas:(i) explicit
use of both preceding and following tag contexts via a dependency network representation,(ii) …

We demonstrate that an unlexicalized PCFG can parse much more accurately than previously
shown, by making use of simple, linguistically motivated state splits, which break down …

… HAM-D 17 (17-item version of the HAM-D) total score. … -D 17 , HAM-D 21 , and HAM-D 24 ;
and 3) the QIDS-SR 16 total score and total scores on the HAM-D 17 , HAM-D 21 , and HAM-D …

Background Patients with chronic forms of major depression are difficult to treat, and the relative
efficacy of medications and psychotherapy is uncertain. Methods We randomly assigned …

… are young and within reach of browsing mammals (Klein 1977). Thus the expected response
to browsing of … McKey, D. 1979. The distribution of secondary compounds within plants. - …

… and Arnold sterilizer dehydrogenase activity: (curves A and B) Arnold sterilizer dehydrogenase
activity and (curves C and D) 37C, dehydrogenase activity. Soil for curves A and D was …