نتایج جستجو برای: local scouring

تعداد نتایج: 532532  

2015
Jens Thomas Roberto Saglia Ralf Bender Peter Erwin Maximilian Fabricius

We present indirect constraints on the stellar initial-mass-function (IMF) in nine massive elliptical galaxies with σ ≈ 300 km/s, via a comparison of dynamical and stellarpopulation based stellar masses. We use adaptive-optics assisted, high resolution kinematical data from the SINFONI Search for Supermassive Black Holes that allow us to constrain the dynamical stellar mass-to-light ratio in th...

2012
Brendan Hermalyn Peter H. Schultz Mark Shirley Kimberly Ennico Anthony Colaprete

The Lunar CRater Observation and Sensing Satellite mission (LCROSS) impacted the moon in a permanently shadowed region of Cabeus crater on October 9th 2009, excavating material rich in water ice and volatiles. The thermal and spatial evolution of LCROSS ejecta is essential to interpretation of regolith properties and sources of released volatiles. The unique conditions of the impact, however, m...

Journal: :Water 2023

Local scour holes are erosional bed structures that related to different scientific disciplines in Earth science and hydraulic engineering. scouring at naturally placed boulders is ubiquitous, but many competing factors make it difficult isolate the effects of a given variable. This especially true for local natural instream obstacles exposed unsteady flow conditions course flood hydrograph exp...

Journal: :Journal of Bridge Engineering 2021

Abstract Scouring of pile group foundations is a common phenomenon for cross-river bridges and can produce significant damage in earthquake-prone regions. This study experimentally investigated the...

Journal: :Journal of dairy science 2000
J D Qiugley C A Jaynes M L Miller E Schanus H Chester-Jones G D Marx D M Allen

An alternative protein ingredient based on spray-dried, hydrolyzed red blood cells was evaluated in calf milk replacers. Two experiments were conducted to determine the value of the ingredient on intake, growth, and feed efficiency in dairy calves. In experiment 1, Holstein bull calves (n = 120) were fed calf milk replacer containing 0, 11, 22, or 43% of crude protein as spray dried hydrolyzed ...

2018
Chi-wai Kan

100% grey cotton knitted fabric contains impurities and yellowness and needs to be prepared for processing to make it suitable for coloration and finishing. Therefore, conventionally 100% grey cotton knitted fabric undergoes a process of scouring and bleaching, which involves the use of large amounts of water and chemicals, in order to remove impurities and yellowness. Due to increased environm...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده کویر شناسی 1390

امروزه از مهمترین بحث هایی که بخش زیادی از زمان محققین را به خود اختصاص داده است، مباحث مربوط به آب به عنوان حیاتی ترین ماده بقای حیات انسان. تغییر در آب در دسترس می تواند واکنش جدی در پایداری آب زیست محیطی مناطق خشک و نیمه خشک ایجاد کند. لذا یکی از پر کاربردترین مباحث مربوط به هیدرولوژی بررسی هیدروگراف جریان می باشد که امکان مطالعه حجم سیلاب و میزان ذخیره حوزه پس از قطع بارندگی و نیز سهم آب زی...

Journal: :Acta Geophysica 2022

One of the most common problems for river engineers is accumulation waterborne debris upstream bridge piers. In addition to reducing cross-sectional flow area, increases drag force exerted pier and contributes scour. Several studies have been carried out by previous researchers examine usefulness different types countermeasures. The effectiveness these countermeasures not well understood when o...

Journal: :Journal of Flood Risk Management 2021

Abstract The Ningxia reach of the Yellow River (NRYR) is wide and shallow, instability damages are likely to occur at its vulnerable zone. In this study, based on one‐dimensional hydro‐sediment dynamics, two‐dimensional dynamics zone stability analysis model, a coupled model was established analyze scouring risk zones in NRYR during flood season. Considering morphological change bank slope caus...

Journal: :E3S web of conferences 2021

Because of the problem local scour caused by change flow structure water-resistance column bridge pier, theoretical analysis, and indoor water tank test were used to study effect installing a new anti-scouring device in front pier on reduction effect; influence main design parameters such as height protective device, angle distance from was selected, optimal parameter combination selected. The ...

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