نتایج جستجو برای: net loss or retained
تعداد نتایج: 3893505 فیلتر نتایج به سال:
OBJECTIVES Although occupational noise is a well known risk factor for hearing loss, little epidemiological evidence has been reported on its association with hearing loss in the general population, in part, because of the difficulty in exposure assessment. This study introduced a quantitative occupational noise exposure assessment tool using the Occupational Information Network (O*NET) databas...
This study models net welfare impacts on producers who receive utility from on-farm wildlife populations that are not costlessly disposable. Wildlife damage levels where net benefits are zero indicate producers' maximum willingness to pay for on-farm wildlife. An empirical model is developed. Results for Ontario producers suggest the net welfare loss from damage is approximately half of the val...
به منظور بررسی تاثیر پروبیوتیک و سطوح مختلف پودر صمغ آنغوزه در مقایسه با آنتی بیوتیک (آویلامایسین) بر عملکرد رشد، وزن نسبی اندام های داخلی، میکروفلور روده، مورفولوژی پرزهای روده، کیفیت گوشت و تیترآنتی بادی بر علیه گلبول قرمزگوسفندی در جوجه های گوشتی، آزمایشی در قالب طرح کاملا تصادفی با 6 تیمار به اجرا درآمد. تیمارهای آزمایشی شامل: جیره پایه بدون افزودنی، جیره پایه حاوی 100 میلی گرم در کیلو گرم ...
Karst landscapes are often perceived as highly vulnerable to agricultural phosphorus (P) loss, via solution-enlarged conduits that bypass P retention processes. Although attenuation of P concentrations has been widely reported within karst drainage, the extent to which this results from hydrological dilution, rather than P retention, is poorly understood. This is of strategic importance for und...
Background: Clinical laboratories need to manage resources properly and scientifically to survive in today's highly competitive environment. In this context, scientific-economic principles should be considered to determine the profitability or loss of laboratories. Thus, in this study, the net profit of laboratory services was measured based on scientific-economic principles. Meth...
OBJECTIVE To measure the cost of nonattendance ("no-shows") and benefit of overbooking and interventions to reduce no-shows for an outpatient endoscopy suite. METHODS We used a discrete-event simulation model to determine improved overbooking scheduling policies and examine the effect of no-shows on procedure utilization and expected net gain, defined as the difference in expected revenue bas...
Background & Aims : Laparoscopic cholecystectomy is the treatment of choice for symptomatic gallstones. The term postcholecystectomy syndrome (PCS) comprises a heterogeneous group of symptoms and findings in patients who have previously undergone cholecystectomy.With the number of cholecystectomies being performed increasing in the laparoscopic era the number of patients presenting with PCS...
INTRODUCTION A retained placenta is diagnosed when the placenta is not delivered following delivery of the baby. It is a major cause of postpartum haemorrhage and treated by the operative procedure of manual removal of placenta (MROP). METHODS AND ANALYSIS The aim of this pragmatic, randomised, placebo-controlled, double-blind UK-wide trial, with an internal pilot and nested qualitative resea...
conclusions the adoption of 85 dba as the permissible exposure limit has preserved hearing threshold level among participants at 3000 hz compared to those who embraced 90 dba. patients and methods this is an intervention study done on two automobile factories. there were 203 employees exposed to noise levels beyond the action level. hearing protection devices were distributed to reduce noise le...
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