Results 31 to 40 of about 4,757,573 (192)

A Comparison of Centroid Factor Extraction Methods for Q Methodology [PDF]

open access: yes, 2020
Q方法論は、定性的手法と定量的手法を利用して主観的な考え(subjectivity)を体系的に研究するアプローチ法である。主成分分析や他の因子分析は計算能力が向上したにも関わらず、重心因子分析はQ方法論の中で重要な役割を果たしている。本論文では、重心因子分析を抽出するためにQ方法論で使用されていない Tucker-MacCallum(T-M)法と、Q方法論で一般的に使用されている手法を比較する。様々なサイズと構造の異なる4つのデータセットを3つの因子抽出法で調べたところ、これら3つの手法は最初の2 ...
BANASICK, Shawn
core   +1 more source

Evolution of dipolar mixed-mode coupling factor in red giant stars: impact of buoyancy spike [PDF]

open access: yes, 2022
Mixed modes observed in red giants allow for investigation of the stellar interior structures. One important feature in these structures is the buoyancy spike caused by the discontinuity of the chemical gradient left behind during the first dredge-up ...
Gizon, Laurent   +11 more
core   +1 more source

Limiting Characteristics for Receiving Small Size Frame Antenna Matching Using Converter Negative Impedance

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2018
The limiting characteristics of electrically small-sized loop antenna matching by means of non-Foster's negative inductance are studied. Various options for including negative inductance in frame antenna structure are considered.
A. A. Golovkov, E. I. Mozhaeva
doaj   +1 more source

Quality factor control of mechanical resonators using variable phononic bandgap on periodic microstructures

open access: yesScientific Reports, 2022
The quality factor (Q-factor) is an important parameter for mechanical resonant sensors, and the optimal values depend on its application. Therefore, Q-factor control is essential for microelectromechanical systems (MEMS).
Naoki Inomata, Yuka Tonsho, Takahito Ono
doaj   +1 more source

Experimental Study on Variation of Surface Roughness and Q Factors of Fused Silica Cylindrical Resonators with Different Grinding Speeds

open access: yesMicromachines, 2021
For the axisymmetric shell resonator gyroscopes, the quality factor (Q factor) of the resonator is one of the core parameters limiting their performances.
Libin Zeng   +5 more
doaj   +1 more source

On the q-factorization of power series

open access: yesThe Ramanujan Journal
Any power series with unit constant term can be factored into an infinite product of the form $\prod_{n\geq 1} (1-q^n)^{-a_n}$. We give direct formulas for the exponents $a_n$ in terms of the coefficients of the power series, and vice versa, as sums over partitions. As examples, we prove identities for certain partition enumeration functions.
Schneider, Robert   +2 more
openaire   +3 more sources

The mitogenic potential of heparin-binding epidermal growth factor in the human endometrium is mediated by the epidermal growth factor receptor and is modulated by tumor necrosis factor-alpha [PDF]

open access: yes, 2002
Heparin-binding epidermal growth factor (HB-EGF), a member of the epidermal growth factor (EGF) family, is implicated in a variety of biological processes, including reproduction.
Mardon, Helen J.   +23 more
core   +1 more source

Analytical Derivation of the q-Factor for Slender Masonry Structures Under Out-of-Plane Seismic Action

open access: yesBuildings
Slender masonry structures, in the absence of disintegration phenomena, can be idealized as rigid bodies subjected to seismic excitation. In this study, a closed-form expression for the behavior factor (q-factor) associated with overturning collapse ...
Simona Coccia
doaj   +1 more source

Difference limen for the Q-factor of room modes [PDF]

open access: yes, 2003
A subjective test study was carried out in order to identify the perceptibility of changes in the Q-factor of room modes. The experimental technique concentrates on the identification of difference limen for three levels of Q-factor referring to modes in
Fazenda, Bruno   +2 more
core  

Q-mode varimax factor scores matrix of benthic foraminifera assemblage of sediment core PS2495-3 [PDF]

open access: yes, 2006
Q-mode varimax factor scores matrix of benthic foraminifera assemblage of sediment core PS2564-2 and PS2564-
Rudolph, Miriam   +3 more
core   +1 more source

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