نتایج جستجو برای: 20th century
تعداد نتایج: 117401 فیلتر نتایج به سال:
This article considers errors of care in neonatology. In the 19th century errors that resulted in high infant mortality were shaped by the social environment, and in this setting the development of the incubator failed. In the early 20th century, with the emergence of the modern hospital as a technological, science-driven system, physicians had more control of patients' environments, and thus m...
Adhesives have played and will continue to play an important role in the efficient utilization of wood resources. Early Egyptians used adhesives to attach rare veneers to wood furniture. Today, adhesives play a vital role in allowing almost all types and sizes of wood to be converted to functional products. For centuries, wood was bonded using biobased adhesives. In the 20th century, synthetic ...
In Italy, malaria was an endemic disease that was eradicated by the mid-20th century. This paper evaluates the prophylactic and therapeutic remedies used by folk medicine to cure malaria in Calabria (southern Italy).The data has been collected by analysing works of physicians, ethnographers, folklorists and specialists of the study of Calabrian history between the end of the 19th century and th...
The relatively muted warming of the surface and lower troposphere since 1998 has attracted considerable attention. One contributory factor to this “warming hiatus” is an increase in volcanically induced cooling over the early 21st century. Here we identify the signals of late 20th and early 21st century volcanic activity in multiple observed climate variables. Volcanic signals are statistically...
Cropland area per capita and pressure index on cropland are important parameters for measuring the social vulnerability and sustainability from the perspective of food security in a certain region in China during the historical periods. This study reconstructed the change in spatial distribution of cropland area per labor/household and pressure index on cropland during the 17th–20th century by ...
in his last years of life americans had almost forgotton steinbeck, and those who had not, occasionally criticized him for supporting and praising the u. s. military intervention in the vietnam war. althought ateinbeck incorporates different themes into his works, each one bears many signs of his concern and sympathy for america and the american common people in particular. steinbecks to a god ...
P.726, lines 3–4. Replace “However, none of these authors gave formal definitions of substitution and conversion, which are characteristic of CL and λ proper. These did not appear ...” by “However, none of these authors showed the interplay between reduction, substitution and conversion explicitly by means of a formal theory, as is done in CL and λ. The latter theories did not appear ...”. P.72...
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