Results 111 to 120 of about 5,579,484 (341)

Universal In Situ Isotope Exchange Raman Spectroscopy (IERS) Methodology for Measuring Oxygen Surface Exchange Dynamics Using a Probe Layer

open access: yesAdvanced Functional Materials, EarlyView.
A bespoke multilayer thin film configuration has been designed, which overcomes the material dependency of conventional isotope exchange Raman spectroscopy (IERS). This universal IERS methodology is efficient, non‐destructive and provides additional structural information and time resolution, which can be further extended to various isotopic elements ...
Zonghao Shen   +7 more
wiley   +1 more source

User satisfaction with referrals at a collaborative virtual reference service Virtual reference services, Reference services, Referrals, User satisfaction

open access: yesInformation Research: An International Electronic Journal, 2006
Introduction. This study investigated unmonitored referrals in a nationwide, collaborative chat reference service. Specifically, it examined the extent to which questions are referred, the types of questions that are more likely to be referred than ...
Nahyun Kwon
doaj  

The regression model of virtual GPS reference station

open access: yesGeodesy and Cartography, 2012
The principle of calculating coordinates determined by GPS method and carrier's phase shift and corrections for pseudodistances as well as applying the regression model is presented in the article.
Jonas Skeivalas
doaj   +1 more source

Quantum communication using a bounded-size quantum reference frame

open access: yes, 2009
Typical quantum communication schemes are such that to achieve perfect decoding the receiver must share a reference frame with the sender. Indeed, if the receiver only possesses a bounded-size quantum token of the sender's reference frame, then the ...
Barnum H   +10 more
core   +2 more sources

Peptide Sequencing With Single Acid Resolution Using a Sub‐Nanometer Diameter Pore

open access: yesAdvanced Functional Materials, EarlyView.
To sequence a single molecule of Aβ1−42–sodium dodecyl sulfate (SDS), the aggregate is forced through a sub‐nanopore 0.4 nm in diameter spanning a 4.0 nm thick membrane. The figure is a visual molecular dynamics (VMD) snapshot depicting the translocation of Aβ1−42–SDS through the pore; only the peptide, the SDS, the Na+ (yellow/green) and Cl− (cyan ...
Apurba Paul   +8 more
wiley   +1 more source

Low Volume, Funding, Staffing and Technical Problems are Key Reasons for Discontinuation of Chat Reference Services. A review of: Radford, Marie L., and M. Kathleen Kern. “A Multiple‐case Study Investigation of the Discontinuation of Nine Chat Reference Services.” Library & Information Science Research 28.4 (Sept. 2006): 521‐47.

open access: yesEvidence Based Library and Information Practice, 2007
Objective – To investigate the reasons behind the cessation of 9 virtual (chat) reference services.Design – Multiple case‐study investigationSetting – Academic, public, and special libraries in the United States.Subjects – Five academic libraries, 1 ...
Stephanie R. Walker
doaj  

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

open access: yesAdvanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey   +5 more
wiley   +1 more source

Unveiling Aggregation‐Induced Singlet Fission in Push–Pull Diketopyrrolopyrrole Water Dispersed Nanoaggregates and Thin Films

open access: yesAdvanced Functional Materials, EarlyView.
Aggregates of diketopyrrolopyrrole dipolar and quadrupolar systems exhibit panchromatic absorption spectra extending in the entire visible range. Upon aggregation in water and in the solid state, their fluorescence is almost completely quenched and their singlet excited state lifetime is significantly shortened.
Roberto Cantoni   +10 more
wiley   +1 more source

Solvent‐Free Bonding Mechanisms and Microstructure Engineering in Dry Electrode Technology for Lithium‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
Dry electrode technology revolutionizes battery manufacturing by eliminating toxic solvents and energy‐intensive drying. This work details two promising techniques: dry spray deposition and polymer fibrillation. How their unique solvent‐free bonding mechanisms create uniform microstructures for thicker, denser electrodes, boosting energy density and ...
Yuhao Liang   +7 more
wiley   +1 more source

Digital Reference: What the Past Has Taught Us and What the Future Will Hold

open access: yesIranian Journal of Information Processing & Management, 2007
By the end of the nineteenth century, the role of the librarian had expanded to include reference service, and it has been part of the profession since then.
Mehdi Mohammadi
doaj  

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