Results 271 to 280 of about 753,997 (405)

Health observatories in iran.

open access: yesIranian Journal of Public Health, 2013
The Islamic Republic of Iran, in her 20 year vision by the year 2025, is a developed country with the first economic, scientific and technological status in the region, with revolutionary and Islamic identity, inspiring Islamic world, as well as ...
A Rashidian   +6 more
doaj  

Reflective Solar Cooker [PDF]

open access: yes
Introduction: This reflective solar cooker uses the Sun’s energy to cook marshmallows. The target cooking area is the space where the light concentration is greatest. Never look directly at the Sun! It could damage your eyes. Don’t allow the cooker to
McDonald Observatory   +1 more
core  

Are non‐economic goals and financial performance friends or foes in hybrid ventures? A duality perspective on academic spin‐offs

open access: yesStrategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary This study draws on the behavioral theory of the firm and a duality perspective to investigate the impact of founders' focus on academic goals on the financial performance of academic spin‐offs (ASOs)—a specific type of hybrid venture. We theorize that such relationship follows an inverse U‐shaped curve and is moderated by the
Tommaso Minola   +4 more
wiley   +1 more source

Equatorial Sundial [PDF]

open access: yes
Introduction: One of astronomy’s first tools to measure the flow of time, a sundial is simply a stick that casts a shadow on a face marked with units of time. As Earth spins, the shadow sweeps across the face.
Mcdonald Observatory   +1 more
core  

Do digital platforms create entrepreneurial opportunities? Evidence from marginal areas

open access: yesStrategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary This article enters the debate on the effects of digital platforms on entrepreneurial opportunities by estimating whether the entry of a home‐sharing platform shapes entrepreneurial decisions in marginal areas. We add a novel perspective to the literature, as we contend that when economic conditions are unfavorable, digital ...
Francesco Luigi Milone   +2 more
wiley   +1 more source

The Pierre Auger Cosmic Ray Observatory [PDF]

open access: yes, 2015
A. Aab   +499 more
semanticscholar   +1 more source

Open letter: There are more than just trees and forests to be conserved and restored

open access: yes
PLANTS, PEOPLE, PLANET, EarlyView.
Natashi Pilon   +136 more
wiley   +1 more source

An observational study of a circular gust front over the Yangtze Delta, China

open access: yesWeather, EarlyView.
Concentric gust fronts are formed when a thunderstorm's downdraft reaches the ground and the outflow from the cold pool spreads uniformly outwards into the surrounding warm and humid air mass. Observational evidence presented here show the case of narrow‐band echoes forming a ring around a thunderstorm.
Wenjie Zhou   +6 more
wiley   +1 more source

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