Results 11 to 20 of about 39,163,890 (305)

The MOSDEF survey: direct-method metallicities and ISM conditions at z ∼ 1.5–3.5 [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2019
We present detections of [O iii] λ4363 and direct-method metallicities for star-forming galaxies at z = 1.7–3.6. We combine new measurements from the MOSFIRE Deep Evolution Field (MOSDEF) survey with literature sources to construct a sample of 18 ...
R. Sanders   +16 more
semanticscholar   +1 more source

The Determination of the Methane Content of Coal Seams Based on Drill Cutting and Core Samples from Coal Mine Roadway

open access: yesEnergies, 2021
The determination of methane content of coal seams is conducted in hard coal mines in order to assess the state of methane hazard but also to evaluate gas resources in the deposit. In the world’s mining industry, natural gas content in coal determination
Nikodem Szlązak   +2 more
doaj   +1 more source

DPO: Direct Planar Odometry with Stereo Camera

open access: yesSensors, 2023
Nowadays, state-of-the-art direct visual odometry (VO) methods essentially rely on points to estimate the pose of the camera and reconstruct the environment.
Filipe C. A. Lins   +4 more
doaj   +1 more source

Explore Optical Solitary Wave Solutions of the kp Equation by Recent Approaches

open access: yesCrystals, 2022
The study of nonlinear evolution equations is a subject of active interest in different fields including physics, chemistry, and engineering. The exact solutions to nonlinear evolution equations provide insightful details and physical descriptions into ...
Hammad Alotaibi
doaj   +1 more source

Iterative filtering as a direct method for the decomposition of nonstationary signals [PDF]

open access: yesNumerical Algorithms, 2018
The Iterative Filtering method is a technique developed recently for the decomposition and analysis of nonstationary and nonlinear signals. In this work, we propose two alternative formulations of the original algorithm which allows to transform the ...
A. Cicone
semanticscholar   +1 more source

Simplified Equations to Find the Relationship Between Soil and Structure Displacements for Rectangular Single Column and Footing on Dry Voidless Cohesionless Soil Due to Vertical Loads [PDF]

open access: yesمجلة جامعة النجاح للأبحاث العلوم الطبيعية, 2023
Usually, structural designers are assuming the soil as rigid object when they design small to intermediate structures, or assuming the settlement of soil to be always within the acceptable range.
Fawzi Abu Al-Adas, Abdul Razzaq Touqan
doaj   +1 more source

Research Note: Phosphorus digestibility of corn, wheat, soybean meal, and corn gluten meal in quail chicks

open access: yesPoultry Science, 2022
: A series of experiments was designed and conducted to determine the apparent and standardized ileal phosphorus digestibility (i.e., AIDP and SIDP, respectively) of some grains and protein meals in Japanese quail at different age classes during the ...
Mahmoud Ghazaghi, Mehran Mehri
doaj   +1 more source

Ionized Gaseous Nebulae Abundance Determination from the Direct Method [PDF]

open access: yes, 2017
This tutorial explains the procedure used to analyze an optical emission-line spectrum produced by a nebula ionized by massive star formation. Particularly, the methodology used to derive physical properties, such as electron density and temperature, and
E. Pérez-Montero
semanticscholar   +1 more source

Laboratory Determination of Average Shear Stress in Smooth Rectangular and Trapezoidal Open Channels by Direct Method [PDF]

open access: yesعلوم و مهندسی آبیاری, 2016
Aim of this study is to measure shear stress in smooth rectangular and trapezoidal open channels. A new approach is presented to measure direct shear on wet perimeter of open channels.  A water flume with a section on a frictionless support (called knife
Manoochehr Fathi Moghadam   +2 more
doaj   +1 more source

ABS-Based Direct Method for Solving Complex Systems of Linear Equations

open access: yesMathematics, 2021
Efficient solution of linear systems of equations is one of the central topics of numerical computation. Linear systems with complex coefficients arise from various physics and quantum chemistry problems.
József Abaffy, Szabina Fodor
doaj   +1 more source

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