نتایج جستجو برای: fires
تعداد نتایج: 9134 فیلتر نتایج به سال:
Title of Document: Flame Extinction and Air Vitiation Effects In FDS In Poorly Ventilated Compartment Fires Zhixin Hu, Master Thesis, 2005 Directed by: Arnaud Trouvé, Associate Professor Department of Fire Protection Abstract: Compartment fires with different ventilation conditions exhibit different dynamical behaviors, ranging from steady fuel-limited fires to unsteady airlimited fires. Numeri...
Self-ignited, naturally occurring coal fires and fires resulting from human activities persist for decades in underground coal mines, coal waste piles, and unmined coal beds. These uncontrolled coal fires occur in all coal-bearing parts of the world (Stracher, 2007) and pose multiple threats to the global environment because they emit greenhouse gases—carbon dioxide (CO2), and methane (CH4)—as ...
Fires in croplands, plantations, and rangelands contribute significantly to fire emissions in the United States, yet are often overshadowed by wildland fires in efforts to develop inventories or estimate responses to climate change. Here we quantified decadal trends, interannual variability, and seasonality of Terra Moderate Resolution Imaging Spectroradiometer (MODIS) observations of active fi...
A small number of fires escape initial attack suppression efforts and become large, but their effects are significant and disproportionate. In 1983, of 200,000 wildland fires in the United States, only 4,000 exceeded 100 acres. However, these escaped fires accounted for roughly 95 percent of wildfire-related costs and damages (Pyne, 1984). Thus, future research efforts logically will focus on t...
Boreal fires have immediate effects on regional carbon budgets by emitting CO2 into the atmosphere at the time of burning, but they also have legacy effects by initiating a long-term carbon sink during post-fire vegetation recovery. Quantifying these different effects on the current-day pan-boreal (44–84 N) carbon balance and quantifying relative contributions of legacy sinks by past fires is i...
Coal fires are common and serious phenomena in most coal-producing countries in the world. Coal fires not only burn valuable non-renewable coal reserves but also severely affect the local and global environment. The Rujigou coalfield in Shizuishan City, Ningxia, NW China, is well known for being a storehouse of anthracite coal. This coalfield is also known for having more coal fires than most o...
Qualitative and semi-quantitative analyses presented in this article suggest that the massive fires caused by the crash of the planes into the World Trade Center Towers and the spillage of large amounts of jet fuel inside the buildings played a major role in their quick collapse on September 11, 2001. It is argued that the WTC fires, while unprecedented in form, magnitude and extent, resembled ...
Coal fires are a common and serious problem in most coal-bearing countries. Thus, it is very important to monitor changes in coal fires. Remote sensing provides a useful technique for investigating coal fields at a large scale and for detecting coal fires. In this OPEN ACCESS Remote Sens. 2015, 7 3089 study, the spreading direction of a coal fire in the Wuda Coal Field (WCF), northwest China, w...
OBJECTIVES To identify the proportion of adult cigarette smokers who have experienced cigarette-caused fires and burns and to describe smoker characteristics associated with increased risk of cigarette-caused fires and burns. METHODS Data on cigarette-caused fires and burns were collected in the baseline questionnaire of a randomised trial of a smoking cessation intervention conducted in New ...
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