Results 21 to 30 of about 15,652,676 (359)

Complex Receptive Fields in Primary Visual Cortex [PDF]

open access: yesThe Neuroscientist, 2003
In the early 1960s, Hubel and Wiesel reported the first physiological description of cells in cat primary visual cortex. They distinguished two main cell types: simple cells and complex cells. Based on their distinct response properties, they suggested that the two cell types could represent two consecutive stages in receptive-field construction ...
Martínez, Luis M., Alonso, José-Manuel
openaire   +3 more sources

Primary production of the biosphere: integrating terrestrial and oceanic components

open access: yesScience, 1998
Integrating conceptually similar models of the growth of marine and terrestrial primary producers yielded an estimated global net primary production (NPP) of 104.9 petagrams of carbon per year, with roughly equal contributions from land and oceans ...
C. Field   +3 more
semanticscholar   +1 more source

Perinatal mortality trends in Kwekwe District in Midlands Province, Zimbabwe, 2017 – 2020: A Secondary Data Analysis

open access: yesJournal of Interventional Epidemiology and Public Health, 2023
Introduction: Perinatal mortality comprises of the total number of stillbirths and deaths within the first seven days of life. Kwekwe District reported a 59.92% increase in perinatal deaths from 247 in 2017 to 395 in 2020.
Nyashadzashe Cosmas Makova   +5 more
doaj   +1 more source

Factors associated with a malaria outbreak at Tongogara refugee camp in Chipinge District, Zimbabwe, 2021: a case–control study

open access: yesMalaria Journal, 2022
Background Malaria is a leading cause of morbidity and mortality among forcibly displaced populations, including refugees, approximately two-thirds of whom reside in malaria endemic regions.
Kudzai Patience Takarinda   +6 more
doaj   +1 more source

Logarithmic primary fields in conformal and superconformal field theory [PDF]

open access: yesNuclear Physics B, 2005
17 pages LaTeX 2e, references added, journal details ...
openaire   +2 more sources

Terrestrial gross primary production: Using NIRV to scale from site to globe

open access: yesGlobal Change Biology, 2019
Terrestrial photosynthesis is the largest and one of the most uncertain fluxes in the global carbon cycle. We find that near‐infrared reflectance of vegetation (NIRV), a remotely sensed measure of canopy structure, accurately predicts photosynthesis at ...
Grayson Badgley   +3 more
semanticscholar   +1 more source

Epidemiological description of and response to a large yellow fever outbreak in Edo state Nigeria, September 2018 - January 2019

open access: yesBMC Public Health, 2022
Background Edo State Surveillance Unit observed the emergence of a disease with “no clear-cut-diagnosis”, which affected peri-urban Local Government Areas (LGAs) from September 6 to November 1, 2018.
E. Nwachukwu William   +25 more
doaj   +1 more source

Optimal collimation of misaligned optical systems by concentering primary field aberrations.

open access: yesOptics Express, 2010
A collimation method of misaligned optical systems is proposed. The method is based on selectively nullifying main alignment-driven aberration components.
Hanshin Lee
semanticscholar   +1 more source

Routine immunization community surveys as a tool for guiding program implementation in Kaduna state, Nigeria 2015–2016

open access: yesBMC Public Health, 2018
Background Routine childhood immunization remains an important strategy for achieving polio eradication and maintaining a polio-free world. To address gaps in reported administrative coverage data, community surveys were conducted to verify coverage, and
Terna I. Nomhwange   +8 more
doaj   +1 more source

A comparative assessment of cold chain management using the outbreak of circulating vaccine-derived polio virus type 2 as a surrogate marker in Oyo State, Nigeria-2019

open access: yesThe Pan African Medical Journal, 2020
INTRODUCTION: Inspite of demonstrable evidence of the preventive and protective ability of vaccines to reduce the outbreak of vaccine-preventable diseases, there are still some significant disease outbreaks recorded in our communities.
Olaniyan Akintunde Babatunde   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy