Results 91 to 100 of about 26,323 (148)

Using Self-study to Challenge my Teaching Practice in Mathematics Education [PDF]

, 2002
Sandy Schuck
openalex   +1 more source

Traps, Tail States and Their Consequences on the Open‐circuit Voltage in Organic Solar Cells

Advanced Energy Materials, EarlyView.
It is found that the light‐intensity dependent low‐temperature roll‐off of open‐circuit voltage in organic solar cells is explained by the intrinsic disorder in these devices, which can be either described by the full Gaussian density of states or approximated by a two‐level system, which allows for a more intuitive interpretation.
Tobias Krebs, Clemens Göhler, Martijn Kemerink   +2 more
wiley   +1 more source

Reforming Science and Mathematics Education

, 1995
J. J. Lagowski
openalex   +1 more source

Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells

Advanced Energy Materials, EarlyView.
Organic photovoltaics are a promising solar cell technology, but even the record devices with 20% efficiency have significant fill factor losses due to low active layer conductivities. In this Perspective, the authors describe the origin of these losses, discuss experimental methods for their quantification, and explain how to minimize them to optimize
Chen Wang, Roderick C. I. MacKenzie, Uli Würfel, Dieter Neher, Thomas Kirchartz, Carsten Deibel, Maria Saladina   +6 more
wiley   +1 more source

Forces for Change in Mathematics Education—: The Case of TIMSS

, 2000
Donald Macnab
openalex   +2 more sources

Research on Reform in Mathematics Education, 1993-2000 [PDF]

, 2002
John A. Ross, Douglas McDougall, Anne Hogaboam‐Gray   +2 more
openalex   +1 more source

Discerning Performance Bottlenecks of State‐of‐the‐Art Narrow Bandgap Organic Solar Cells

Advanced Energy Materials, EarlyView.
This work quantitatively discerns the loss mechanisms of state‐of‐the‐art low‐bandgap organic solar cells based on BTPV‐4X‐eC9 acceptors. Compared to PM6:Y6, geminate recombination of charge transfer (CT) states governs photocurrent losses. This relates to conformational freedom of these acceptors that restricts their aggregation, and also counteracts ...
Atul Shukla, Manasi Pranav, Guorui He, J. Terence Blaskovits, Davide Mascione, Yonglin Cao, Yufei Gong, Drew B. Riley, Julian A. Steele, Eduardo Solano, Alexander Ehm, Mohammad Saeed Shadabroo, Ardalan Armin, Safa Shoaee, Dietrich R. T. Zahn, Yongfang Li, Lei Meng, Felix Lang, Denis Andrienko, Dieter Neher   +19 more
wiley   +1 more source

Impact of Information Technology on Mathematics Education - A Slovenian Experience [PDF]

, 2003
Liljana Ferbar, Peter Trkman
openalex   +1 more source

Increasing sedentary time, minimum dietary energy requirements, and food security assessment

Applied Economic Perspectives and Policy, EarlyView.
Abstract We compute corrections for sedentary behavior in physical activity levels (PALs) and incorporate them along with corrections for over estimation of basal metabolic rates (BMRs) into threshold caloric intakes, known as minimum dietary energy requirements (MDERs).
Jacob Michels, Yacob Abrehe Zereyesus, John Beghin   +2 more
wiley   +1 more source

Reusable ReOx‐Pd/CeO2 Catalyst with Low Metal Surface Concentration for Efficient Consecutive Deoxydehydration and Hydrogenation of Vicinal OH Groups

Advanced Energy and Sustainability Research, EarlyView.
Less metal, more distance! The ReOx‐Pd/CeO2 catalyst, an active heterogeneous catalyst for the consecutive deoxydehydration and hydrogenation of vicinal diol, suffers a gradual loss of activity throughout its use due to the polymerization of monomeric ReOx active species.
Savitri Larasati, Yoshinao Nakagawa, Mizuho Yabushita, Keiichi Tomishige   +3 more
wiley   +1 more source