Results 111 to 120 of about 25,220 (299)

Maximizing coherence of oscillations by external locking

, 2015
We study how the coherence of noisy oscillations can be optimally enhanced by external locking. Basing on the condition of minimizing the phase diffusion constant, we find the optimal forcing explicitly in the limits of small and large noise, in ...
Pikovsky, Arkady
core   +1 more source

‘School is their whole world’: Teachers' perspectives on loneliness among children and adolescents from England and mainland China

British Educational Research Journal, EarlyView.
Abstract As front‐line observers and active participants in pupils' daily lives, teachers closely monitor pupils' social interactions, emotional states and behavioural changes. Their unique perspective enables them to detect problems in the social lives of their pupils that may not be immediately visible to peers, parents or mental health professionals.
Yixuan Zheng, Charlotte Bagnall, Caroline Bond, Elizabeth Birchinall, Pamela Qualter   +4 more
wiley   +1 more source

Nonlinear Frequency Conversion of Dissipative Soliton Resonance Pulses Using the Second Harmonic Generation Effect

IEEE Photonics Journal
We present the first demonstration of using the second harmonic generation effect to upconvert dissipative soliton resonance laser pulses. We have designed and built two independent dissipative soliton resonance lasers, emitting rectangular shaped ...
Piotr Bojes, Piotr Jaworski, Karol Krzempek   +2 more
doaj   +1 more source

Passively Harmonic Mode-Locked Fiber Laser With a High Signal-to-Noise Ratio via Evanescent-Light Deposition of Bismuth Telluride $(\hbox{Bi}_{2}\hbox{Te}_{3} )$ Topological Insulator Based Saturable Absorber

IEEE Photonics Journal, 2015
Passively harmonic mode locking (HML) operation had been demonstrated in an erbium-doped fiber laser with a microfiber-based topological insulator (TI) Bi2Te3 saturable absorber (SA).
L. N. Duan, Y. G. Wang, C. W. Xu, L. Li, Y. S. Wang   +4 more
doaj   +1 more source

Length controlled stabilized mode-lock ND:YAG laser [PDF]

, 1977
A method and apparatus for stabilizing the amplitude and repetition rate of mode-locked Nd:YAG laser pulses by controlling the laser length through a feedback loop are described.
Sigfred, J.
core   +1 more source

Advancing Sustainable Development in Manufacturing: A Strategic Framework for Overcoming Green–Lean Implementation Barriers

Business Strategy and the Environment, EarlyView.
ABSTRACT Manufacturing's transition to sustainable development depends on integrating green with lean under credible environmental policy and stakeholder engagement. Although benefits are well established, the literature underspecifies implementation barriers and their prioritisation. This study identifies, structures, and prioritises barriers to green–
Jose Arturo Garza‐Reyes, Andrew Defanto, Ranjit Roy Ghatak, Rohit Joshi, Walid al Saad   +4 more
wiley   +1 more source

Ultralow phase noise microwave generation with an Er:fiber-based optical frequency divider

, 2011
We present an optical frequency divider based on a 200 MHz repetition rate Er:fiber mode-locked laser that, when locked to a stable optical frequency reference, generates microwave signals with absolute phase noise that is equal to or better than ...
Andrew D. Ludlow, Bartels, Bartels, Diddams, Fortier, Franklyn Quinlan, Hudson, Ivanov, Jennifer A. Taylor, Jiang, Kim, Ma, Matthew S. Kirchner, Michael J. Thorpe, Millo, Millo, Nathan Lemke, Rubiola, Santarelli, Scott A. Diddams, Tara M. Fortier, Taylor, Yanyi Jiang, Zhang   +23 more
core   +1 more source

Circular Economy Pathways for Airport Climate Change Mitigation

Business Strategy and the Environment, EarlyView.
ABSTRACT Airport operators face growing climate‐change pressures; the circular economy offers pathways to reduce impacts and recover resources. We examine how airport operators apply the circular economy in practice. We use an exploratory qualitative multicase design based on practitioner‐generated documents (e.g., press releases and sustainability ...
Michele Oppioli, Davide Calandra, Federico Lanzalonga, Paolo Biancone   +3 more
wiley   +1 more source

Stable, Ultrafast Pulse Mode-Locked by Topological Insulator ${\rm Bi}_{2}{\rm Se}_{3} $ Nanosheets Interacting With Photonic Crystal Fiber: From Anomalous Dispersion to Normal Dispersion

IEEE Photonics Journal, 2015
We demonstrate two kinds of stable ultrafast fiber lasers mode-locked by topological insulator (TI) Bi2Se3 nanosheets interacting with photonic crystal fiber (PCF).
Lei Gao, Tao Zhu, Wei Huang, Zhengqian Luo   +3 more
doaj   +1 more source

Translating Circularity Into Strategy: A Governance Meta‐Capability Framework

Business Strategy and the Environment, EarlyView.
ABSTRACT Firms struggle to transition to circular economy (CE) models, often citing external barriers. Yet some firms succeed, whereas others fail: Why? We argue that success depends on a specific governance capability—a meta‐capability that allows firms to (1) sense and strategically reframe CE imperatives, (2) seize opportunities by aligning diverse ...
Felix Carl Schultz, Vladislav Valentinov   +1 more
wiley   +1 more source