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So it’s no wonder that our tester, Alyce Tassoni, was very excited to try the new side-by-side Nuna trvl™ dubl from the cult-favorite brand, with her 15-month-old twins.
Being both portable and able to generate wind speeds of between 140–270 miles per hour (63–121 m/s) and air volumes of 14 m 3 per minute, the leaf blower has many potential uses in amateur construction projects. [citation needed] The leaf blower originated in 1947 as a backpack fogger apparatus, invented by Japanese-based Kyoritsu Noki Company.
Airborne wind energy (AWE) is the direct use or generation of wind energy by the use of aerodynamic or aerostatic lift devices. AWE technology is able to harvest high altitude winds, in contrast to wind turbines, which use a rotor mounted on a tower. The term high-altitude wind power (HAWP) has been used to refer to AWE systems. [1]
The increased low wind capabilities of optimized, modern devices enable downwind steering down to 1.3 m/s apparent wind and 1.5 kn of boat speed [8] [9] – properties that make an electronic steering device nearly redundant and enable crossing the doldrums under wind vane self-steering. An increasing number of long distance regatta sailors are ...
Archips semiferanus (also known as Archips semiferana) is a species of moth in the family Tortricidae, and one of several species of moth commonly known as oak leafroller or oak leaf roller. The larvae feed on the leaves of oak trees in the eastern United States and southeastern Canada and are a major defoliator of oak trees, which can lead to ...
A single leaf of marram grass, showing the rolled leaf which reduces water loss 100x magnified cross section of a curled leaf. Ammophila arenaria is a perennial plant, which means it can live for many years. It mainly grows in spring when leaf production exceeds leaf senescence.
Wind-turbine blades in laydown yard awaiting installation. The primary application of wind turbines is to generate energy using the wind. Hence, the aerodynamics is a very important aspect of wind turbines. Like most machines, wind turbines come in many different types, all of them based on different energy extraction concepts.
Columbia, also known as Nuna or Hudsonland, is a hypothetical ancient supercontinent. It was first proposed by John J.W. Rogers and M. Santosh in 2002 [ 1 ] and is thought to have existed approximately 2,500 to 1,500 million years ago (Ma), in the Paleoproterozoic era.