نتایج جستجو برای: 1 yr

تعداد نتایج: 2767948  

Journal: :Experimental Gerontology 2021

The 30-s sit-to-stand (STS) muscle power test is a valid to assess in older people; however, whether it may be used trajectories of lower-limb through the adult lifespan not known. This study evaluated pattern and time course variations relative, allometric specific STS throughout lifespan. Subjects participating Copenhagen Sarcopenia Study (729 women 576 men; aged 20 93 years) were included. L...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تفت - دانشکده عمران 1393

گسل های امتدادلغز با طول بیش از 100 کیلومتر، که در بسیاری از مناطق فعال قارهای مشاهده و گزارش شده اند، توانایی تولید زمین لرزه های بزرگ را دارند. در شمال باختر ایران، وجود حرکت های برشی سبب ایجاد گسل های امتدادلغز شده است که گسل شمال تبریز یکی از نمونه های بارز و بسیار مهم آن می باشد. از آنجایی که سیستم تعیین موقعیت جهانی (gps) یک تکنیک ژئودتیک بسیار قوی و دقیق در مطالعه حرکات و تغیییر شکل های ...

2001
Jirí Kopácek Josef Veselý Evzen Stuchlík

Major fluxes of sulphur and dissolved inorganic nitrogen were estimated in Central European mountain ecosystems of the Bohemian Forest (forest lakes) and Tatra Mountains (alpine lakes) over the industrial period. Sulphur outputs from these ecosystems were comparable to inputs during a period of relatively stable atmospheric deposition (10-35 mmol m-2 yr-1) around the 1930s. Atmospheric inputs o...

2010
J. B. Hall B. R. Johnson R. H. Stokes R. Ambrosek K. Coffey J. Jennings C. West A. Young T. Hess M. Savin C. Rosenkrans K. P. Coffey A. N. Young C. P. West G. F. Erf C. F. Rosenkrans

The objective of this study was to compare summer annuals for fall and winter grazing on irrigated pastures in the Intermountain West. The cool desert areas of this region have short growing seasons (≤120 d) with high daytime temperatures and cool nights resulting in sufficent growing degree days, but impaired production on cool season forages during late summer. Five species were planted in Ca...

Journal: :Journal of environmental quality 2010
B Mack L M McDonald J Skousen

Acidity of water from abandoned underground mines decreases over time, and the rate of decrease can help formulate remediation approaches and treatment system designs. The objective of this study was to determine an overall acidity decay rate for above-drainage underground mines in northern West Virginia from a large data set of mines that were closed 50 to 70 yr ago. Water quality data were ob...

2015
Yao Gong Zhigang Yu Qingzhen Yao Hongtao Chen Tiezhu Mi Jiaqiang Tan Miklas Scholz

The rapid growth of the economy in China has caused dramatic growth in the industrial and agricultural development in the Yellow River (YR) watershed. The hydrology of the YR has changed dramatically due to the climate changes and water management practices, which have resulted in a great variation in the fluxes of riverine nutrients carried by the YR. To study these changes dissolved nutrients...

Journal: :The Astrophysical Journal 2022

We report on proper motion measurements of the forward- and reverse-shock regions supernova remnant Cassiopeia A (Cas A), including deceleration/acceleration forward shock. The combine 19 years observations with Chandra X-ray Observatory, using 4.2-6 keV continuum band, preferentially targeting synchrotron radiation. average expansion rate is $0.218 \pm 0.029$%yr$^{-1}$ for shock, corresponding...

Journal: :Journal of animal science 2012
X J Cao H P Wang H Yao P O'Bryant D Rapp W M Wang R MacDonald

Two selection methods, 1-stage selection (OSS) and 2-stage selection (TSS), for improving efficiency and profitability of selective breeding of yellow perch were evaluated, through examining the genetic and phenotypic parameters for BW of F(1) fish using microsatellite parentage assignment in this study. Approximately 94% of the sampled yellow perch progeny were assigned to single parental pair...

2015
Bhim B. Ghaley Harpinder S. Sandhu John R. Porter

Land use and management intensity can influence provision of ecosystem services (ES). We argue that forest/agroforestry production systems are characterized by relatively higher C:O/C:N and ES value compared to arable production systems. Field investigations on C:N/C:O and 15 ES were determined in three diverse production systems: wheat monoculture (Cwheat), a combined food and energy system (C...

Journal: :Journal of animal science 2000
J W Lee D F Waldron L D Van Vleck

Variance components for greasy fleece weight in Rambouillet sheep were estimated. Greasy fleece weight was modeled either as repeated measurements on the same trait or as different traits at different ages. The original data were separated according to the age of the ewe at shearing into three classes; 1 yr, 2 and 3 yr, and older than 3 yr. An animal model was used to obtain estimates of geneti...

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