Numerous investigators have worked on the problem of determining the effect of small quantities of visible radiant energy on seedlings and other plants with stored foods. The literature is extensive and goes back over one hundred years. MAcDOUTGAL (6) has thoroughly reviewed the work before 1900 while TRUMPF (9) and BURKHOLDER (1) have reviewed this and much of the later work. The work before 1...

Politics of Participation: Walter Reed’s Yellow-Fever Experiments Akhil Mehra, MD, MPhil At the termination of the Spanish-American War in 1900, American military forces occupied the island of Cuba. Tropical diseases were a major concern of the government, and the American Surgeon General dispatched Major Walter Reed and a team of young doctors to investigate the diseases, particularly the path...

In this paper we use annual panel data, 1870-1910, to estimate and compare the determinants of European emigration to Argentina, Brazil, and the United States. We employ the Hausman-Taylor Instrumental Variable technique, which provides for cross-sectional (country) and temporal (annual) controls, accounts for variables that are potentially correlated with the unobservables, and allows the reco...

5.9 million children under age five died in 2015, 16 000 every day. Globally, under-five mortality rate has decreased by 53%, from an estimated rate of 91 deaths per 1000 live births in 1990 to 43 deaths per 1000 live births in 2015. The average annual rate of reduction in under-five mortality has accelerated from 1.8%  a year over the period 1990–2000 to 3.9%  for 2000–2015 , but remains insuf...

Soft Gamma Repeaters (SGRs) undergo changes in their pulse properties and persistent emission during episodes of intense burst activity. SGR 1900+14 has undergone large flux increases following recent burst activity. Both SGR 1900+14 and SGR 1806−20 have shown significant changes in their pulse profile and spindown rates during the last several years. The pulse profile changes are linked with t...

We show that the giant flares of soft gamma-ray repeaters ( ergs) can push the inner regions of a fall44 E ∼ 10 back disk out to larger radii by radiation pressure, while matter remains bound to the system for plausible parameters. The subsequent relaxation of this pushed-back matter can account for the observed enhanced X-ray emission after the August 27 giant flare of SGR 1900 14. Based on th...

A. R. Samana, C. A. Barbero, S. B. Duarte, A. J. Dimarco and F. Krmpotić Department of Physics Texas A&M University-Commerce, P.O.Box 3011 , Commerce, Texas, USA Centro Brasileiro de Pesquisas F́ısicas, Rua Dr. Xavier Sigaud 150, CEP 22290-180, Rio de Janeiro-RJ, Brazil Instituto de F́ısica La Plata, CONICET, 1900 La Plata, Argentina Departamento de F́ısica, Facultad de Ciencias Exactas, Universid...

(1) Cátedra de Microbiología y Parasitología, Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Calle 60 y 120, La Plata (1900), Argentina. (2) Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Calle 526 e/10 y 11, La Plata (1900) Argentina. (3) Instituto de Bioestadística, Facultad de Ciencias de la Salud, Universidad Adventista del Plata, Calle 25 de Mayo ...