Results 111 to 120 of about 4,859 (223)

On the Friction and Wear Mechanisms of Electrified Steel Contacts in CO2: Unveiling the Role of Carbon‐Rich Tribofilms Under Dry Sliding Conditions

open access: yesAdvanced Materials Interfaces, EarlyView.
This study investigates friction and wear of AISI 52100 steel under dry sliding in CO2, air, and N2 atmospheres, with and without contact electrification. CO2 forms a stable carbon‐rich tribofilm that reduces friction by ∼30% and wear by ∼85%. High‐resolution TEM, EELS, and molecular dynamics reveal pressure‐dependent lubrication mechanisms, showing ...
Julio A. Cao‐Romero‐Gallegos   +6 more
wiley   +1 more source

The limitations of dispersive freedom : Michel Foucault and historiography [PDF]

open access: yes
In this thesis I argue that Foucault's dispersive historiography is a deepening rather than a purifying of historical existence. This emphasis upon dispersion as a critical principle is contrasted with, and delimited by the possibility of the ...
Ashby, David
core  

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

open access: yesAdvanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz   +5 more
wiley   +1 more source

Trust and transformation in the water sector in South Africa

open access: yes, 2005
Water policy under the 1956 Water Act actively discouraged participation and water was managed centrally. The principles enshrined in the National Water Act (no 36 of 1998), designed in line with international sustainable development goals that actively ...
Goldin, Jaqui
core  

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

open access: yesAdvanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu   +8 more
wiley   +1 more source

A multidimensional developmental neuropsychological model of borderline personality disorder (BPD): examining evidence for impairments in 'executive function'

open access: yes, 2005
Borderline Personality Disorder (BPD) is a serious psychiatric disorder characterised by turbulent interpersonal relationships, impaired self image, impulsivity, and a recurrent pattern of unstable affect which is usually evident by early adulthood.
Theunissen, Christopher
core  

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

open access: yesAdvanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel   +4 more
wiley   +1 more source

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