Results 51 to 60 of about 122,986 (267)

Report of the Inter-American Tropical Tuna Commission for the year 1952 [PDF]

open access: yes, 1953
ENGLISH: The Inter-American Tropical Tuna Commission, established by a Convention between the United States and Costa Rica, has as its purpose the collection and interpretation of information which will facilitate maintaining, at levels of maximum ...

core  

For the Love of Water. Designing and Assessing a Sand Filter for Integral Sustainability Education

open access: yesEuropean Journal of Education, Volume 61, Issue 2, June 2026.
ABSTRACT Science education, from an early age, plays a key role in promoting sustainability. Within this framework, water emerges as a valuable resource for studying fundamental scientific principles and fostering critical reflection on its sustainable use.
Laura Salahange   +3 more
wiley   +1 more source

Expresiones políticas y movilización popular en los pueblos de la campaña de Buenos Aires. La Guardia de Luján y el Sitio de Lagos (1852-1854)

open access: yesNuevo mundo - Mundos Nuevos, 2012
This article will address the problematic political transition produced in the province of Buenos Aires after the battle of Caseros in February 1852 and the impact that gender in the campaign.
María Fernanda Barcos
doaj   +1 more source

Length-frequency estimation for yellowfin tuna (Thunnus albacares) caught by commercial fishing gear in the Eastern Pacific Ocean [PDF]

open access: yes, 1992
ENGLISH: Methods of collecting samples for the purpose of estimating the numbers and weights of fish caught, by length interval, are described. Several models for two-stage sampling are described, and the equations for the estimators and their variances ...
Calkins, Thomas P.   +2 more
core  

Acute Music‐Frequency Exposure Modulates Salivary Stress and Neurotrophic Markers in Young Adults: A Randomized Controlled Trial

open access: yesBrain and Behavior, Volume 16, Issue 5, May 2026.
Distinct music frequencies used are as follows: – 528 Hz → BDNF & CREB (learning, memory, and neuroplasticity). – 432 Hz → GRP78 (cellular stress response marker). – Stroop Test → No immediate cognitive difference. Note that a frequency of 528 Hz showed a pattern compatible with enhanced neurotrophic signaling, while a frequency of 432 Hz was linked to
Ümmü Gülşen Bozok   +3 more
wiley   +1 more source

Distribution of catch-per-unit-of-effort and fishing effort for tuna in the Eastern Tropical Pacific Ocean by months of the year 1951-1960 [PDF]

open access: yes, 1962
ENGLISH: Comparison of physical and biological environmental factors affecting the aggregation of tunas with the success of fishing by the commercial fleets, requires that catch and effort data be examined in greater detail than has been presented in ...
Martin, John Wilson
core  

“The Future Is Ancestral”: The Environmental Cuir Utopias of Gabriela Cabezón Cámara

open access: yesFuture Humanities, Volume 4, Issue 1, May 2026.
ABSTRACT Argentinian author Gabriela Cabezón Cámara identifies as a “socio‐environmentalist and writer” and has been actively involved in the feminist movement #NiUnaMenos since 2015, alongside her growing engagement with environmental activism. She advocates for Indigenous land rights, water accessibility, and challenges offshore petroleum extraction ...
Victoria Jara
wiley   +1 more source

Avaliação do ruído em barcos pesqueiros como prevenção na saúde dos pescadores

open access: yesRevista Gestão & Saúde, 2015
O setor pesqueiro representa um instrumento de geração de empregos e um dos itens que simbolizam a melhoria na produção é a saúde ocupacional dos pescadores.
Elisabete Coentrão Marques   +2 more
doaj  

Some factors affecting the distribution and apparent abundance of yellowfin and skipjack tuna in the Eastern Pacific Ocean [PDF]

open access: yes, 1964
ENGLISH: Since 1951, the Inter-American Tropical Tuna Commission has been investigating the biology, ecology and population dynamics of the yellowfin tuna, Thunnus albacares, and the skipjack tuna, Katsuwonus pelamis, in the Eastern Pacific Ocean.
Barrett, Izadore, Broadhead, Gordon C.
core  

Gamma-Ray Emission from Arp 220: Indications of an Active Galactic Nucleus

open access: yes, 2017
Extragalactic cosmic ray populations are important diagnostic tools for tracking the distribution of energy in nuclei and for distinguishing between activity powered by star formation versus active galactic nuclei (AGNs).
Aalto, Susanne   +3 more
core   +1 more source

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