Results 71 to 80 of about 2,592 (294)

Simulation and Assessment of Thermal-Stress Analysis of Welding Materials in IGBT

Micromachines
Insulated gate bipolar transistors (IGBTs), as an important power semiconductor device, are susceptible to thermal stress, thermal fatigue, and mechanical stresses under high-voltage, high-current, and high-power conditions.
Yang Yang, Jibing Chen, Bowen Liu, Yiping Wu   +3 more
doaj   +1 more source

Crisis Preparation, Capacity Building, and Community Resilience: Lessons From Maui

Nonprofit Management and Leadership, EarlyView.
ABSTRACT The 2023 Maui wildfires provide a unique context to explore the impact of nonprofit crisis networks taking a proactive role in community crisis response, leveraging resources, expertise, and networks. The Hawaiʻi Community Foundation (HCF) has been a key player in Maui's local response, providing critical support, mobilizing volunteers, and ...
Lauren Azevedo, Kaila Witkowski, Ratna Dougherty, Christa Remington   +3 more
wiley   +1 more source

Micromechanics of fracture under static and fatigue loading. Optical interferometry of crack tip craze zones

, 2022
S.137-214Brittle failure of many thermoplastics is associated with craze formation and governed by craze breakdown. Optical interferometry is a powerful tool for the investigation of this type of plastic deformation in transparent polymers, especially ...
Könczöl, L., Döll, W.
core   +1 more source

Crosslinking effect on the deformation and fracture of monodisperse polystyrene-co-divinylbenzene particles

eXPRESS Polymer Letters, 2013
This study focuses on the effect of crosslinking density on the mechanical response of polystyrene-co-divinylbenzene (PS-DVB) particles under compression by means of nanoindentation-based flat punch method combined with SEM observation of particle ...
Z. L. Zhang, J. Y. He, H. Kristiansen, K. Redford, G. Fonnum, G. I. Modahl   +5 more
doaj   +1 more source

Interplanetary frontiers: terraforming from an invasion science perspective

Oikos, EarlyView.
The pursuit of a multi‐planetary existence represents one of humanity's greatest frontiers. If applied justly, it offers an opportunity to extend its civilization's lifespan amid escalating sustainability crises on Earth. One approach increasingly gaining traction is terraforming, a hitherto theoretical ecological and evolutionary experiment revolving ...
Teun Everts, Ronaldo Sousa, Phillip J. Haubrock   +2 more
wiley   +1 more source

Single Versus Double Screw Extrusion: Impact on Mechanical Performance and Crack Resistance for a Virgin, Recycled, and Blended Polypropylene

Polymer Engineering &Science, EarlyView.
Schematic overview of the study approach and key findings. ABSTRACT To evaluate the influence of extrusion on material performance, three processing methods, single extrusion (1x Ex), double extrusion (2x Ex), and double screw compounding (C), were investigated for virgin polypropylene (vPP), recycled PP (rPP), and a blend containing 10% rPP (rPP10 ...
J. Pötzlbauer, J. Geier, B. Haar, S. Schuschnigg, M. Messiha, T. Koch, C. Maurer, G. Pinter, F. Arbeiter   +8 more
wiley   +1 more source

Crazing in polymethylmethacrylaat

, 1973
Het doel van het onderzoek is een inzicht te verkrijgen in het ontstaan van crazing in polymeren. Als materiaal is daarvoor polymethylmethacrylaat gekozen, omdat dit zich goed leent voor visuele waarneming van crazing...Applied SciencesScheikundige ...
Jansse, W.J. (author)
core  

Sources of Strength for School‐Based Suicide Prevention: Key Implementation Strategies Based on School Professional Perspectives

Psychology in the Schools, EarlyView.
ABSTRACT As concerns for rising rates of youth suicide and suicidal thoughts and behaviors continue to grow, there is a need to prioritize school‐based suicide prevention programs. Despite evidence documenting the effectiveness of school‐based prevention programs for reducing suicide‐related risk in adolescents, schools face numerous barriers to ...
Marisa E. Marraccini, Maya Gutman, Layne A. Wetherbee, Jessica R. Jacobs, Donald Christian Fisher, Dorothy L. Espelage, Sarah Haley McGlothin, Denise Yookong Williams, Paul Lanier   +8 more
wiley   +1 more source

Evaluation of thermal performance of window materials for satellite payloads in low earth orbit (LEO) [PDF]

MATEC Web of Conferences
Selecting the appropriate window materials for use in space products such as Low Earth Orbit (LEO) satellite optical payloads is of critical importance. Windows on satellite optical payloads are essential for mission success and functionality. They serve
Baloyi Andrew, Dikole Realeboga, Naidoo Shrikant, Seletani Rofhiwa   +3 more
doaj   +1 more source

Deformation, Creep, and Dynamics in Glassy Ionomers

Journal of Polymer Science, EarlyView.
Ionic architecture tunes the inelastic deformation of glassy ionomers. Simulations show that ionic associations leave the small‐strain elastic baseline nearly unchanged, but strongly reinforce yielding, strain hardening, and creep resistance. Polyampholyte architectures suppress nonaffine mobility and stress‐induced fluidization most effectively by ...
Nazanin Sadeghi, Fardin Khabaz
wiley   +1 more source