نتایج جستجو برای: four periods including present warm period
تعداد نتایج: 3087212 فیلتر نتایج به سال:
The Qajar paintings can be categorized into two main periods: the first period, initiated at the beginning of the reign of Fath-Ali Shah and continued until the reign of Naser al-din Shah. It focuses on the combination of ornamental and Persian painting forms with the achievements of naturalist art such as perspective principle and its important feature is the total domination of Persian art. I...
ABSTRACT I report on a large-scale search for the orbital periods (P) of most known nova systems, by looking significant, coherent, and stable optical photometric modulation in two or more independent light curves taken mostly from large surveys TESS, Kepler, AAVSO, SMARTS, OGLE, ASAS, ZTF. have discovered 31 new periods. Further, measured 18 novae with evolved companions, to 30 per cent accura...
Modern acidification by the uptake of anthropogenic CO2 can profoundly affect the physiology of marine organisms and the structure of ocean ecosystems. Centennial-scale global and regional influences of anthropogenic CO2 remain largely unknown due to limited instrumental pH records. Here we present coral boron isotope-inferred pH records for two periods from the South China Sea: AD 1048-1079 an...
The extent and behaviour of glaciers during the mid-Piacenzian warm period illustrate the sensitivity of the cryosphere to atmospheric CO2 concentrations above pre-industrial levels. Knowledge of glaciation during this period is restricted to globally or regionally averaged records from marine sediments and to sparse terrestrial glacial deposits in mid-to-high latitudes. Here we expand the Plio...
We used a canine model of airway reactivity to examine the role of airway heat flux in the response to dry air challenge. Airflow-induced bronchospasm (AIB) was assessed by measuring collateral system resistance (Rcs) with a wedged bronchoscope technique in anaesthetized mechanically ventilated dogs. We manipulate post-challenge airway heat flux by exposing peripheral airways to cool dry air (2...
OBJECTIVE Several studies have shown positive effects of treatment of chronic diseases in a warm climate. The aim of this study was to evaluate the long-term effect of a 4-week rehabilitation programme in a warm climate for patients with neuromuscular diseases. DESIGN A randomized controlled trial with a cross-over design. One period of intervention and one period of "life as usual". PATIEN...
he reconstruction of global temperatures during the last millennium can provide important clues for how climate may change in the future. A recent, widely cited reconstruction ( ) leaves the impression that the 20th century warming was unique during the last millennium. It shows no hint of the Medieval Warm Period (from around 800 to 1200 A.D.) during which the Vikings colonized Greenland ( ), ...
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