Results 81 to 90 of about 56,629 (301)

Paths for colonization or exodus? New insights from the brown bear (Ursus arctos) population of the Cantabrian Mountains.

open access: yesPLoS ONE, 2020
Over the centuries, the geographical distribution of brown bear (Ursus arctos) across the Iberian Peninsula has been decreasing, with the species currently confined to North Iberia.
Inês Gregório   +5 more
doaj   +1 more source

Wayne E. Brown at Toledo Big Bear location

open access: yes, 1950
Wayne E. Brown at toledo big bear location. In 1934, an innovation in food retailing was introduced in Columbus when Wayne E. Brown opened the first self-service supermarket in central Ohio. The name “Big Bear” was chosen because Brown felt it was catchy
Big Bear
core  

Surface‐Functionalized LLZO‐Incorporated Multilayer Composite Solid Electrolytes for Dendrite Suppression and Efficient Ionic Conduction in Lithium–Metal Batteries

open access: yesAdvanced Materials, EarlyView.
A soft–hard tri‐layer composite electrolyte that couples fast Li+ transport with reinforced interfacial stability to enable high‐conductivity, mechanically robust, dendrite‐free lithium‐metal batteries. ABSTRACT The development of solid polymer electrolytes is central to safe, high‐energy lithium‐metal batteries (LMBs); however, persistent challenges ...
Fazal Ur Rehman   +9 more
wiley   +1 more source

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

Ancestral polymorphisms and sex-biased migration shaped the demographic history of brown bears and polar bears.

open access: yesPLoS ONE, 2013
Recent studies have reported discordant gene trees in the evolution of brown bears and polar bears. Genealogical histories are different among independent nuclear loci and between biparentally inherited autosomal DNA (aDNA) and matrilineal mitochondrial ...
Shigeki Nakagome   +2 more
doaj   +1 more source

Wayne E. Brown at the Graceland Shopping Center Big Bear location

open access: yes, 1954
Wayne E. Brown at the graceland Big Bear location. Big Bear is responsible for many innovations in the supermarket business. They were the first to introduce motorized counters that were controlled by the cashier.
Big Bear
core  

3D Printing of Stretchable, Compressible and Conductive Porous Polyurethane for Soft Robotics

open access: yesAdvanced Materials Technologies, EarlyView.
A 3D‐printable porous dopamine‐polyurethane acrylate elastomer results in conductive, stretchable, and compressible structures that can be metallized in situ through catechol‐mediated silver reduction. The resulting material function as both compliant soft robot with a and strain sensors without complex assemblies, enabling fully 3D‐printed soft ...
Ouriel Bliah   +3 more
wiley   +1 more source

Zanesville Big Bear store

open access: yes, 1948
Black and white photograph of the exterior of the Zanesville Big Bear location, in June of 1948. Big Bear is responsible for many innovations in the supermarket business.
Big Bear
core  

3D‐Printing Aided Rapid Prototyping of Pretensioned Tensegrity Structures for Robotic Applications

open access: yesAdvanced Robotics Research, EarlyView.
Printing, injection molding, and assembly (PMA) is a method for rapid prototyping mesoscale, topologically complex, and tensioned tensegrity structures. In combination with PMA method, two mold design strategies: modular mold and compact channel layout, enable efficiency and scalability for tensegrity fabrication.
Yi Sun   +3 more
wiley   +1 more source

Behavioral and Physiological Responses of Scandinavian Brown Bears (Ursus arctos) to Dog Hunts and Human Encounters

open access: yesFrontiers in Ecology and Evolution, 2019
Innovations in biologging have offered new possibilities to better understand animals in their natural environment. Biologgers can be used by researchers to measure the impact of human disturbances on wildlife and guide conservation decisions.
Luc Le Grand   +9 more
doaj   +1 more source

Home - About - Disclaimer - Privacy