Results 81 to 90 of about 4,375 (273)

SYNTHESIS OF CERTAIN MECHANISMS WHICH GENERATE LUNULES OVER POLYGONS WITH 5 SIDES [PDF]

open access: yesFiabilitate şi Durabilitate, 2016
A synthesis for a mechanism relying on a sequence of articulated quadrilaterals which plot lunules along a penthagon is made. The plotting is successful. The speeds of plotting points are neither equal, nor constant.
Iulian POPESCU, Ludmila SASS
doaj  

Defect‐Driven Charge Separation in Ba‐Doped SrTiO3: Correlating Photoelectrochemical Performance With Dye‐Selective Photocatalysis

open access: yesAdvanced Materials Interfaces, EarlyView.
Ba‐doped SrTiO3 perovskites establish a direct correlation between photoelectrochemical activity and photocatalytic performance. Optimized Ba0.5Sr0.5TiO3 exhibits enhanced charge separation, photocurrent generation, and visible‐light‐driven dye degradation through defect‐induced oxygen vacancies and lattice distortion.
Sagar A. Nikam   +6 more
wiley   +1 more source

Learning Spatial Density Functions of Random Waypoint Mobility over Irregular Triangles and Convex Quadrilaterals

open access: yesMathematics
For the optimization and performance evaluation of mobile ad hoc networks, a beneficial but challenging act is to derive from nodal movement behavior the steady-state spatial density function of nodal locations over a given finite area.
Yiming Feng   +5 more
doaj   +1 more source

Quadrilaterals

open access: yes, 2020
Quadrilaterals is a topic which need not be ‘taught’ by a teacher. As a topic it presents ample opportunities for holding discussion based classes. Geometry topics in general need to be approached as explorations. Quadrilaterals is a topic where students
Shirali, Padmapriya
core  

Exploring Turkish Mathematics Teachers’ Content Knowledge of Quadrilaterals [PDF]

open access: yes, 2017
The aim of this research was to examine mathematics teachers’ performances in defining special types of quadrilaterals, identifying their family and hierarchically classifying them.
Filiz, Mehmet   +3 more
core   +1 more source

Binder‐Free Direct Ink Writing of Li6.4La3Zr1.4Ta0.6O12 Garnet Electrolytes for All‐Solid‐State Batteries

open access: yesAdvanced Materials Interfaces, EarlyView.
Polymer binders and thick pressed LLZTO pellets limit all‐solid‐state battery integration through grain‐boundary carbon and high ohmic losses. A binder‐free capillary suspension ink is direct‐ink‐written and sintered into 254 μm$\mu{\rm m}$, 95.8%‐dense Ta‐stabilized LLZTO with 17.3 mS cm−1$\text{cm}^{-1}$ bulk conductivity, enabling thinner ...
Sri Vaishnavi Thummalapalli   +7 more
wiley   +1 more source

Effect of technology-enriched learning environment on academic achievement of seventh-grade students in quadrilaterals

open access: yesAnadolu Üniversitesi Eğitim Fakültesi dergisi
This research examined the effect of a technology-enriched classroom environment on achievement and retention in quadrilaterals of seventh graders. The quasi-experimental design of quantitative research with a pre-test/post-test matched control group was
Sevim Sevgi, Feyzullah Orman
doaj  

Advances in Halide Perovskites for Photon Radiation Detectors

open access: yesAdvanced Materials Technologies, EarlyView.
This work highlights recent progress in perovskite‐based photon radiation detectors, covering organic–inorganic hybrid, inorganic, lead‐free double, and vacancy‐ordered halide perovskites. Their detection performance is compared, material‐specific advantages and challenges are examined, and provides insight into current limitations and future ...
Liangling Wang   +3 more
wiley   +1 more source

A novel lithium copper iron phosphate with idealized formula Li5Cu22+Fe3+(PO4)4: crystal structure and distribution of defects

open access: yesActa Crystallographica Section E, 2011
Gray–green single crystals were obtained under high-pressure, high-temperature hydrothermal conditions. A refinement of atom occupancies gave the composition Li3.68Cu2+Fe3+(Cu0.55Li0.45)2Fe2+0.15(PO4)4.
Shailesh Upreti   +3 more
doaj   +1 more source

Conductive Tin Oxide Under the Thermal Budget of Perovskite/TOPCon Tandems: Toward Indium‐Free Contacts

open access: yesAdvanced Materials Technologies, EarlyView.
This work demonstrates that achieving conductive undoped SnOx contacts required careful tailoring of oxygen vacancy (VO) tuning and defect engineering. Controlling oxygen deposition pressure and low‐temperature annealing (300°C) optimizes defect stoichiometry and mitigates carrier scattering. This low thermal budget approach significantly enhances Hall
Paul Llontop   +13 more
wiley   +1 more source

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