نتایج جستجو برای: stepped hull

تعداد نتایج: 14754  

Journal: :پژوهش های علوم دامی ایران 0
معصومه تکلوزاده امید دیانی رضا طهماسبی امین خضری

in this research, chemical composition, gas production characteristics, effective degradability and nutritive value index (nvi) of dm and cp by in situ method of treated walnut hull by nurospora sitophila were studied. three fistulated kermani ram were used for determination of walnut hull degradability. data were analysed using completely randomize design. by processing walnut hull with neuros...

2011
S. Felder H. Chanson

An experimental study was conducted on a large size stepped spillway model with a moderate slope (26.6o) for a range of discharges between 0.020 and 0.237 m/s. In some experiments, the stepped chute was equipped with uniform steps of 5 and 10 cm heights respectively. In addition several non-uniform configurations with combinations of 5 and 10 cm high steps were investigated. For each configurat...

2003
Hubert CHANSON

Although field observations of sudden spillway releases highlighted strong aeration of dam break wave flows, no study investigated these two-phase flow characteristics. New original experiments were conducted down a 24 m long stepped waterways. Dam break wave propagation showed an equivalent flow resistance similar to steady flow conditions (f ~ 0.05). Detailed unsteady air-water flow measureme...

2013
Philipp Guenther Stefan Felder Hubert Chanson

The design floods of several reservoirs were recently re-evaluated and the revised spillway outflow could result in dam overtopping with catastrophic consequences for some embankment structures. Herein a physical study was performed on flat and pooled stepped spillways with a slope typical of embankments (θ = 26.6◦) and four stepped configurations were tested: a stepped spillway with flat horiz...

2008
Ozgur KISI M. Emin EMIROGLU Ahmet BAYLAR

A chute is characterized by a steep bed slope associated with torrential flow. This chute flow may be either smooth or stepped. The flow conditions in stepped channels are classified as nappe flow, transition flow and skimming flow. In this paper, hydraulic characteristics of flow regimes on the stepped channels are presented systematically under a wide range of discharge, channel slope and ste...

Journal: :avicenna journal of phytomedicine 0
khadijeh sadat moosavi dolatabadi department of biology, faculty of science, urmia university, urmia, iran, i. r. iran gholamreza dehghan department of biology, faculty of natural science, university of tabriz, tabriz, iran, i. r. iran siavash hosseini department of biology, faculty of science, urmia university, urmia, iran, i. r. iran ali jahanban esfahlan biotechnology research centre, tabriz university of medical sciences, tabriz 51664-14766, iran

objectives: almond (prunus amygdalus) hull and shell are agricultural by-products that are a source of phenolic compounds.the processing of almond produce shell and hull, accounts for more than 50% by dry weight of the almond fruits. recently, more studies have focused on the influence of storage conditions and postharvest handling on the nutritional quality of fruits, especially the antioxidan...

2013
Saeed Asaeedi Farzad Didehvar Ali Mohades

Bounding hull, such as convex hull, concave hull, alpha shapes etc. has vast applications in different areas especially in computational geometry. Alpha shape and concave hull are generalizations of convex hull. Unlike the convex hull, they construct non-convex enclosure on a set of points. In this paper, we introduce another generalization of convex hull, named alpha-concave hull, and compare ...

2011
Stefan Felder Hubert Chanson

While most stepped spillway design guidelines were developed for uniform step heights, a nonuniform stepped design might be a practical alternative in some cases. A physical study was conducted in a moderate slope stepped chute (1V:2H) and five stepped configurations were tested for 0.7 < dc/h < 1.9. Detailed air-water flow measurements were performed for each configuration and the results were...

Journal: :پژوهش های تولید گیاهی 0

in order to study the effects of four concentrations (check, 5, 10 and 15%) of hull extracts on growth of 10 iranian rice cultivars, two experiments were conducted in completely randomized block design with factorial arrangement and three replications at two sites, laboratory and greenhouse. laboratory study showed that same rice hull extracts had stimulat effects and the others had inhibitory ...

Journal: :BMC Medical Research Methodology 2006
Celia A Brown Richard J Lilford

BACKGROUND Stepped wedge randomised trial designs involve sequential roll-out of an intervention to participants (individuals or clusters) over a number of time periods. By the end of the study, all participants will have received the intervention, although the order in which participants receive the intervention is determined at random. The design is particularly relevant where it is predicted...

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