نتایج جستجو برای: underground spaces
تعداد نتایج: 144249 فیلتر نتایج به سال:
Exposure to gases and dust may induce airway inflammation. It was hypothesized that heavy construction workers who had been exposed to dust and gases in underground construction work for 1 yr, would have early signs of upper and lower airway inflammation, as compared to outdoor workers. A study group comprising 29 nonsmoking underground concrete workers (mean +/- SD age 44+/-12 yrs), and a refe...
a r t i c l e i n f o Keywords: GPR GPS GIS 3D underground utility mapping Uncertainty modeling Uncertainty-aware visualization Accuracy assessment Underground utility lines being struck is a long-standing problem worldwide, causing public service disruptions, project delays, cost overruns, property damage, injuries, and fatalities that cost billions of dollars each year. Utility strikes are at...
This paper describes an autonomous deployment and restoration of a Wireless Sensor Network (WSN) using mobile robots. The authors have been developing an information-gathering system using mobile robots and WSNs in underground spaces in post-disaster environments. In our system, mobile robots carry wireless sensor nodes (SN) and deploy them into the environment while measuring Received Signal S...
Uranium was produced in the Königstein mine by conventional mining as well as underground in-situ leaching activity from a sandstone aquifer between 1964 and 1990. Due to the chemical mining and the secondary effect of pyrite oxidation the pore water of the rock matrix has a pH of less than 2 and a high content of among others uranium, iron and sulphate. Another source of contaminants are solub...
Many applications for irrigation management and environment monitoring exploit buried sensors wired-connected to the soil surface for information retrieval. Wireless Underground Sensor Networks (WUSNs) is an emerging area of research that promises to provide communication capabilities to these sensors. To accomplish this, a reliable wireless underground communication channel is necessary, allow...
Air quality in underground spaces has seldom been evaluated in Korea. Accordingly, the current study recently evaluated asbestos exposure among Seoul metropolitan subway workers during the renovation of the subway's air-conditioning system. To identify possible routes of asbestos exposure, suspected sources, including gaskets, ceiling boards, ceiling materials, and dust settled inside ducts, we...
این پایان نامه در سه فصل نوشته شده است، در فصل اول تعاریف و قضایای لازم برای فصل های دوم و سوم بیان شده است. فصل دوم به بررسی عملگرهای ترکیبی وزن دار روی فضاهای توابع اندازه پذیر اختصاصداده شده است. فصل سوم که در واقع اصلی ترین فصل پایان نامه است به بیان نرم اساسی عملگر ترکیبی روی فضاهای ارلیز می پردازد. این پایان نامه بر اساس مقالات زیر تدوین گردیده است: • m. r. jabarzadeh the essential...
در این رساله ابتدا اطلاعاتی پایه ای و مفید درباره ی فضای ضرب داخلی ، فضای هیلبرت ، فضای نرم دار و فضای باناخ بیان شده و در فصل دوم اطلاعاتی راجع به فضای دوگان وعملگرهای خطی بیان شده و در فصل سوم با تجزیه و تحلیل دقیق مقاله a gruss type inequality for sequences of vectors in normed linear spaces and application یک نامساوی دیگر نوع گراوس روی فضاهای خطی نرم دار ارائه واثبات می گردد. وکاربرد آ...
With as many as 4 million passenger journeys within the London Underground system every weekday, the advertisement spaces across the stations hold considerable potential. However, the planning of specific advertisements across time and space is difficult to optimize as little is known about passers-by. Therefore, in order to generate detailed and quantifiable spatio-temporal information which i...
It’s a mammal Jim, but not as we know it... Mammals are typically characterised as furry and warmblooded. The naked mole-rat is neither of these. Being underground and surrounded by hundreds of brothers and sisters, there is little fluctuation in surrounding temperature and they have all but lost the ability to regulate their body temperature physiologically. Living in the dark, they can no lon...
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