نتایج جستجو برای: slope percent
تعداد نتایج: 149321 فیلتر نتایج به سال:
At present, soil surface characteristics (SSC) are recognised as key parameters controlling infiltration rates, runoff generation and erosion. Microtopography of surface among SSC is the main one. The work presented in this paper is based on a set of digital elevation models (DEMs) supplied by two different methods: Laser roughness-meter and photogrammetry method. We used two maquettes. The use...
Despite the implications for policy, empirical evidence on relative importance of factors that shape labor supply responses is missing. This paper helps fill this gap and quantifies role information frictions versus other by combining notches in Norwegian welfare system quasi-experimental variation access to about slope location kinks. While we estimate a frictionless elasticity 0.3, overall at...
At present, soil surface characteristics (SSC) are recognised as key parameters controlling infiltration rates, runoff generation and erosion. Microtopography of surface among SSC is the main one. The work presented in this paper is based on a set of digital elevation models (DEMs) supplied by two different methods: Laser roughness-meter and photogrammetry method. We used two maquettes. The use...
STUDY OBJECTIVE To investigate the acute effect of sodium cromoglycate on airway responses to 4.5 percent saline aerosol challenge, before and during treatment with inhaled budesonide--a corticosteroid. DESIGN Open study, with a total of five visits, two before budesonide treatment, and three follow-up visits, two between 5 and 6 weeks and one at more than 11 weeks. SETTING Referral-based R...
In recent years with developing geographic information systems tools, modeling and simulating methods has been developed quickly. Availability of accurate base maps is the basis of the cell sizes determination and preparing digital hydrologic models. Removing errors and minimizing of uncertainty factors in the digital models play the main role in improving the accuracy of the maps. The main pur...
Background—Impairment of ventilatory efficiency in congestive heart failure (CHF) correlates well with symptomatology and contributes importantly to dyspnea. Methods and Results—We investigated 142 CHF patients (mean NYHA class, 2.6; mean maximum oxygen consumption [V̇O2max], 15.3 mL O2 z kg 21 z min; mean left ventricular ejection fraction [LVEF], 27%). Patients were compared with 101 healthy c...
Poor dyspnea perception might be a risk factor for developing asthma exacerbations. We investigated whether severe asthmatics with recurrent exacerbations (brittle asthma) have different dyspnea perception and sputum cells compared with equally severe, but stable asthmatics, or patients with mild steroid-naive asthma. Fifteen brittle asthmatics (13 female, median age 28 yr [range, 20 to 47 yr])...
Background and Amis: One of the phenomena in arid and semi-arid regions is dust storm. Dust is one of the environmental issues that affect the quality and pollution of the air, human health, soil fertility, visibility, economy, and many social and environmental aspects of the community. The present research has been carried out to identify and characterize the areas of dust source in Khorasan...
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