Results 121 to 130 of about 2,131,875 (378)

An alternative measure of economic inequality under the Lorenz curve framework in analogue to the index of refraction of geometrical optics [PDF]

open access: yes, 2015
Index of refraction is found to be a good measure of economic inequality within the Lorenz curve framework. It has origin in geometrical optics, where it measures bending of a ray of light passing from one transparent medium into another.
Majumder, Amlan
core  

Charting Income Inequality: The Lorenz Curve [PDF]

open access: yes
This paper explains how to build Lorenz Curves for income distributions and discusses their use for inequality measurement. A short conceptual background, a step-by-step procedure and a simple numerical example illustrate how to calculate and draw Lorenz
Bellù, Lorenzo G., Liberati, Paolo
core   +1 more source

Pareto law of the expenditure of a person in convenience stores

open access: yes, 2007
We study the statistical laws of the expenditure of a person in convenience stores by analysing around 100 million receipts. The density function of expenditure exhibits a fat tail that follows a power law.
Anderson   +16 more
core   +1 more source

Isoelectronic Alloying in Zintl Phases Mediated the Avoided Crossing and Phonon Softening

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A small amount of Hf doping endows Zr3Ni3Sb4‐Zintl with an unusually low thermal conductivity far exceeding that of similar systems. Two unique phonon mechanisms—avoided crossing and phonon softening—significantly suppress the lattice thermal conductivity. The average thermoelectric figure of merit is improved by 21%.
Zesong Wang   +6 more
wiley   +1 more source

Butterfly diversity throughout Midnapore urban area in West Bengal, India

open access: yesJournal of Threatened Taxa, 2019
Butterflies have always attracted attention due to their unique colourations.  As most butterflies are highly specific in their niche utilisation, abundance of the species in a locality may advocate status of ecosystem functioning and environmental ...
Surjyo Jyoti Biswas   +5 more
doaj   +1 more source

Growth and Inequality in Ireland, 1987 - 1999 [PDF]

open access: yes
This paper analyses data from the Irish Household Budget Surveys of 1987, 1994 and 1999 to examine the evolution of inequality of income and expenditure over that period.
Cathal Clancy, David Madden
core  

Stepwise Optimization of Thermoelectric Performance in Cu3SbSe4‐Based Compounds via Alloying and Hierarchical Structuring

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Under the stepwise optimization strategy, (Sn, Te) co‐alloying functions as the primary initiative to enhance the power factor (PF), while the subsequent incorporation of AgCuTe operates as a synergistic maneuver to suppress lattice thermal conductivity (κlat), thereby concomitantly boosting the dimensionless figure of merit (ZT).
Wenying Wang   +7 more
wiley   +1 more source

Increasing Student Teachers' Preference of Scientific Evidence—Insights From a Utility Value Intervention

open access: yesFuture in Educational Research, EarlyView.
ABSTRACT Teacher education should equip student teachers with scientific evidence and scientific theories as a resource for future pedagogical action. In opposition to this, student teachers tend to perceive a rather low utility value of scientific evidence and scientific theories for pedagogical action.
Michael Rochnia   +4 more
wiley   +1 more source

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