Results 131 to 140 of about 5,896,695 (283)

Spectral analysis of random source-medium-sink flows

open access: yes, 2008
We introduce and analyze a general stochastic model of random source-medium-sink flows. Particles are emitted from a stationary stochastic source, propagate randomly and independently of each other through a conducting medium, and are irreversibly ...
I. Eliazar
core   +1 more source

Why theory matters for causal inference? Rethinking endogeneity in entrepreneurship research

open access: yesStrategic Entrepreneurship Journal, EarlyView.
Abstract Endogeneity in entrepreneurship research is often treated as a statistical complication addressable through advanced econometric tools. This commentary argues that such an approach overlooks a deeper issue: endogeneity is conceptual before it is statistical.
Daniel Tzabbar
wiley   +1 more source

Surface Locomotion of Cell‐Sized Microrobots Subject to Adhesive Heterogeneity

open access: yesSmall, EarlyView.
Chemically powered, cell‐sized microrobots exhibit translational, circular, or spiral motion through a balance among self‐phoretic propulsion, drag, gravity, and heterogeneous surface interactions. Experiments show that microrobot design and substrate conditions regulate both mobility and trajectory type.
Byung Ha Kang   +3 more
wiley   +1 more source

An Outline of a Theory of Play

open access: yesSymbolic Interaction, EarlyView.
Play is often dismissed as trivial, yet it is a fundamental and adaptive aspect of human and mammalian life. This paper develops a sociological theory of play, treating it as a total social fact that spans biological, psychological, and social dimensions.
Seth Abrutyn
wiley   +1 more source

Empirical Physics‐Based Normal Behavior Modeling of Drive Train Temperatures With High‐Resolution Wind Turbine Operating Data

open access: yesWind Energy, EarlyView.
ABSTRACT The installed wind energy capacity increases every year. However, operation and maintenance costs still make up a considerable portion of the levelized costs of electricity. This costs can be greatly reduced by the application of suitable early fault detection methods. The supervisory control and data acquisition system of wind turbines is one
Timo Lichtenstein   +2 more
wiley   +1 more source

Phosphorus enhances maize yield resilience by sustaining source function and sink activity under post‐silking source–sink imbalance

open access: yes
BACKGROUND Enhancing maize yield resilience under post‐silking stress is essential for stable production.
Weidong Ma   +9 more
core   +1 more source

Study on the Power‐Frequency Arc Extinction Characteristics of Semi‐Closed Short‐Gap Device

open access: yesHigh Voltage, EarlyView.
ABSTRACT Multi‐chamber arc‐extinguishing devices have a simple structure and excellent arc‐extinguishing performance; thus, they have attracted considerable attention as lightning protection devices. However, the structural parameters of different models of the aforementioned devices vary, leading to inconsistent protection levels; therefore, the arc ...
Yeqiang Deng   +4 more
wiley   +1 more source

When Thriving for More Collapses the System: The Academic Reproduction of Uncaring Structures

open access: yesBritish Journal of Management, EarlyView.
Abstract This essay argues that the widening gap between aspirational aims and visionary orientations and the prevailing practices in neoliberal academia stems from deeper, historically rooted, market‐based logics shaping our institutions, increasingly governed by economic values and academic subjectivities therein.
Lara Pecis, Florian Bauer
wiley   +1 more source

Investigating phloem transport dynamics in Arabidopsis through compartmental modelling of positron emission tomography data

open access: yesPlant Methods
Background Phloem is the long-distance transport tissue of vascular plants in which photoassimilates are distributed from sources (e.g., leaves) to sinks (e.g., roots, fruits).
Jens Mincke   +6 more
doaj   +1 more source

Source to Sink Database

open access: yes
The Source-to-Sink (S2S) Database shows a global digital database of catchments and morphological parameters relating to its rivers length, hinterland relief, lithology, continental shelf, continental slope and submarine fan ...
Nyberg, Bjorn
core   +1 more source

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