Results 21 to 30 of about 2,435,892 (275)

A sensitivity analysis of the prediction of the nitrogen fertilizer requirement of cauliflower crops using the HRI WELL_N computer model [PDF]

open access: yes, 2001
HRI WELL_N is an easy to use computer model, which has been used by farmers and growers since 1994 to predict crop nitrogen (N) requirements for a wide range of agricultural and horticultural crops.
Draycott, A. Philip (Arthur Philip)   +4 more
core   +1 more source

Utility-optimal dynamic rate allocation under average end-to-end delay requirements [PDF]

open access: yes2015 54th IEEE Conference on Decision and Control (CDC), 2015
QoS-aware networking applications such as real-time streaming and video surveillance systems require nearly fixed average end-to-end delay over long periods to communicate efficiently, although may tolerate some delay variations in short periods. This variability exhibits complex dynamics that makes rate control of such applications a formidable task ...
Hajiesmaili, Mohammad H.   +2 more
openaire   +2 more sources

Requirements to Determine the Average Pore Size of Nanoporous Media Using Ultrasound [PDF]

open access: yesACS Omega, 2018
Liquids in nanoporous media are exposed to an adsorption-induced pressure, a consequence of the interaction with the pore surface. The smaller the pore diameter, d P, the higher the pressure at saturation and thus the bulk modulus of the confined liquid.
Klaus Schappert, Rolf Pelster
openaire   +3 more sources

Differences between Yaks and Qaidam Cattle in Digestibilities of Nutrients and Ruminal Concentration of Volatile Fatty Acids Are not Dependent on Feed Level

open access: yesFermentation, 2022
The Qinghai–Tibetan Plateau (QTP) is characterized by highly fluctuating seasonal pastures. Yaks (Bos grunniens) graze at higher altitudes than Qaidam cattle (Bos taurus), but the two bovine species co-graze in their overlapping ranges.
Hu Liu   +8 more
doaj   +1 more source

Scientific Opinion on Dietary Reference Values for vitamin A

open access: yesEFSA Journal, 2015
Following a request from the European Commission, the Panel on Dietetic Products, Nutrition and Allergies derived Dietary Reference Values for vitamin A.
EFSA Panel on Dietetic Products, Nutrition, and Allergies (NDA)
doaj   +1 more source

Decentralized Dynamic Hop Selection and Power Control in Cognitive Multi-hop Relay Systems [PDF]

open access: yes, 2010
In this paper, we consider a cognitive multi-hop relay secondary user (SU) system sharing the spectrum with some primary users (PU). The transmit power as well as the hop selection of the cognitive relays can be dynamically adapted according to the local
Lau, Vincent K. N., Ruan, Liangzhong
core   +1 more source

On improving APIT algorithm for better localization in WSN [PDF]

open access: yesJournal of Artificial Intelligence and Data Mining, 2014
In Wireless Sensor Networks (WSNs), localization algorithms could be range-based or range-free. The Approximate Point in Triangle (APIT) is a range-free approach. We propose modification of the APIT algorithm and refer as modified-APIT.
Seyed M. Hosseinirad   +4 more
doaj   +1 more source

Heterodyne interferometer with unequal path lengths [PDF]

open access: yes, 2006
Laser interferometry is an extensively used diagnostic for plasma experiments. Existing plasma interferometers are designed on the presumption that the scene and reference beam path lengths have to be equal, a requirement that is costly in both the ...
Deepak Kumar   +3 more
core   +3 more sources

Sampling requirements and adaptive spatial averaging for incoherent digital holography

open access: yesOptics Express, 2019
Incoherent digital holography (IDH) enables passive 3D imaging under spatially incoherent light; however, the reconstructed images are seriously affected by detector noise. Herein, we derive theoretical sampling requirements for IDH to reduce this noise via simple postprocessing based on spatial averaging.
Teruyoshi Nobukawa   +4 more
openaire   +2 more sources

Effect of Different Working and Tool Parameters on Performance of Several Types of Cultivators

open access: yesAgriculture, 2020
In this study, the effects of tillage depth, forward speed and soil moisture content during the cultivator operation on the draft force, energy requirement, and soil disturbance were investigated using five types of cultivators.
Yousef Abbaspour-Gilandeh   +5 more
doaj   +1 more source

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