Results 251 to 260 of about 1,817,519 (277)

Determination of backwaters and local head losses at stream junctions

Hydrotechnical Construction, 1994
When designing and operating junctions of natural and articial streams, an important consideration is an estimation of the backwaters occuring in the upper stretch of the main channel and tributary as a result of joining open-channel flows. Laboratory investigations were carried out on a large experimental device at the Central Asian Irrigation ...
V. S. Altunin, D. A. Mukhamedov
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Theoretical and experimental study on the local head loss effect of complex rock fracture networks

Arabian Journal of Geosciences, 2021
Research on the seepage characteristics of rock fracture networks remains a challenge in hydraulic engineering design and construction. In order to establish a theoretical model that can describe the seepage characteristics of complex fracture network, based on the equivalent seepage resistance model, considering the local pressure drop loss effect at ...
Zihao Niu, Zhende Zhu, Cheng Liu, Xiangcheng Que, Xinghua Xie   +4 more
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Localization‐specific LKB1 loss in head and neck squamous cell carcinoma metastasis

Head & Neck, 2010
AbstractBackgroundLKB1 loss is associated with invasive carcinoma and metastasis. In head and neck squamous cell carcinoma (HNSCC), lymph node metastasis status is the strongest predictor of survival.MethodsLKB1 immunohistochemistry was performed on primary tumors from patients with HNSCC who never developed metastases, patients with metastases, and ...
Erik R, Kline, Susan, Muller, Lin, Pan, Mourad, Tighiouart, Zhuo Georgia, Chen, Adam I, Marcus   +5 more
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Estimating Local Head Loss of Non Coaxial Emitters

2009 Reno, Nevada, June 21 - June 24, 2009, 2009
The design procedure of a lateral line of trickle irrigation needs to be evaluated accurately, by accounting for head losses distributed in the piping as well as within the emitters. A methodology was developed for determining localized head losses by the formulation of a mathematical model using the concept of an obstruction index.
null Osvaldo Rettore Neto, null Jarbas Honorio Miranda, null Jose Antonio Frizzone, null Stephen R Workman   +3 more
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Local Head Loss of Non-Coaxial Emitters Inserted in Polyethylene Pipe

Transactions of the ASABE, 2009
The design of a lateral line for drip irrigation requires accurate evaluation of head losses in not only the pipe but in the emitters as well. A procedure was developed to determine localized head losses within the emitters by the formulation of a mathematical model that accounts for the obstruction caused by the insertion point. These localized losses
null O. Rettore Neto, null J. H. de Miranda, null J. A. Frizzone, null S. R. Workman   +3 more
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Dimensional analysis approach to estimate local head losses in microirrigation connectors

Irrigation Science, 2013
Local losses, which affect the uniformity of water application, are often ignored in the design of irrigation systems. Some accessories have no simple, efficient equations to estimate these losses. The main objective of this work was to develop an equation to estimate the local head loss in lateral passage connectors.
Danieli Bariviera Zitterell, Jose Antonio Frizzone, Osvaldo Rettore Neto   +2 more
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Hearing Loss After Cisplatin-based Chemoradiotherapy for Locally Advanced Head and Neck Cancer: A Prospective Single-institution Study

Anticancer Research, 2022
A single-institution prospective study was conducted to evaluate hearing loss rate after intensity modulated radiotherapy with concomitant cisplatin-based chemotherapy (CRT) for locally advanced head and neck cancer and identify cochlear dosimetric parameters associated with hearing loss risk.Hearing assessment, patients' characteristics, tumor-related
Musio, Daniela, DE Vincentiis, Marco, D'Urso, Pasqualina, Musacchio, Angela, Maiuri, Veronica, Zaccaro, Lucy, Ralli, Massimo, Marchetti, Claudia, Turchetta, Rosaria, Tombolini, Vincenzo, DE Felice, Francesca   +10 more
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Self-powered and self-sensing water meter using contact-separation triboelectric nanogenerator with harvesting local head loss

Journal of Water Process Engineering
Da-Qi Cao, Xiangyu Chen
exaly   +2 more sources

Accurate sound localization via head movements in listeners with precipitous high-frequency hearing loss.

The Journal of the Acoustical Society of America, 2011
Information about sound source location in the vertical plane is available via the direction-dependent filtering performed by the outer ears, but errors of localization such as front/rear reversals can occur when stimuli contain a limited range of frequencies or when high frequencies are inaudible due to hearing impairment. Information about front/rear
Ewan A. Macpherson, M. Alasdair Cumming, Robert W. Quelch   +2 more
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Experimental determination of local head loss of non-coaxial emitters in thin-wall lay-flat polyethylene pipes

Biosystems Engineering, 2020
The hydraulic performance of thin-wall lay-flat polyethylene pipes with non-coaxial emitters were evaluated in this study. Two experiments were performed to measure the dimensional variation of commercially available lay-flat drip irrigation pipes. A model for estimating the corresponding local head loss was developed and validated using dimensional ...
Jian Wang, Ting Yang, Tao Wei, Rui Chen, Shouqi Yuan   +4 more
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