Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
175
result(s) for
"Abraham, Allen"
Sort by:
The geometry of hand-sewing : a romance in stitches and embroidery from Alabama Chanin and the School of Making
As makers, we tend to learn different stitches over time without thinking much about how they relate to one another. But when Natalie Chanin and her Alabama Chanin and The School of Making teams began to look at needlework closely, they realized all stitches are based on geometric grid systems--and by using grids as guides, they could make learning stitches, even seemingly elaborate ones, as easy as child's play. In The Geometry of Hand-Sewing Chanin presents their breakthrough method, featuring illustrated instructions (for both right- and left-handed stitchers) for more than 100 stitches--from the most basic straight and chain to the more fanciful feather and herringbone; photos of both right and wrong sides; and guidelines for modifying stitches to increase one's repertoire further. To simplify learning, the book also includes two plastic stitching cards die-cut with the grids on which every stitch in the book is based. These reusable cards can be stitched through for practice (just as children use lacing cards to learn to tie shoes) or used as stencils for transferring grids to fabric.
Book
Defect-induced optical and electrochemical properties of Pr2Sn2O7 nanoparticles enhanced by Bi3+ doping
Materials that show superior light-emitting and catalytic properties are in high demand among the scientific community owing to their applications in the areas of optoelectronics and (opto)electrocatalysis. In this work, we have synthesized sub-10-nm Pr
2
Sn
2
O
7
(PSO) and Pr
2
Sn
2
O
7
:Bi
3+
(PSOB) nanoparticles (NPs) and investigated their optical and electrochemical properties. On ultraviolet irradiation, PSO NPs display blue emission because of the presence of oxygen vacancies. Interestingly, PSOB NPs have higher blue emission intensity than undoped PSO NPs owing to the increase in oxygen vacancy defect density induced by Bi
3+
doping. Moreover, PSOB NPs display higher efficiency in terms of current density than PSO NPs as a catalyst toward the oxygen evolution reaction (OER). The kinetic OER models of PSO and PSOB NPs are quite different as displayed by their different Tafel slopes. Interestingly and as another advantage, the PSOB sample is more conducting with low impedance value than the PSO counterpart. With all these advantages due to high oxygen vacancies induced by Bi
3+
doping, PSOB NPs have a great potential to be used as blue phosphors, charge storage devices, and capacitors.
Journal Article
Defect-induced optical and electrochemical properties of Pr 2 Sn 2 O 7 nanoparticles enhanced by Bi 3+ doping
Materials that show superior light-emitting and catalytic properties are in high demand among the scientific community owing to their applications in the areas of optoelectronics and (opto)electrocatalysis. In this work, we have synthesized sub-10-nm Pr 2 Sn 2 O 7 (PSO) and Pr 2 Sn 2 O 7 :Bi 3+ (PSOB) nanoparticles (NPs) and investigated their optical and electrochemical properties. On ultraviolet irradiation, PSO NPs display blue emission because of the presence of oxygen vacancies. Interestingly, PSOB NPs have higher blue emission intensity than undoped PSO NPs owing to the increase in oxygen vacancy defect density induced by Bi 3+ doping. Moreover, PSOB NPs display higher efficiency in terms of current density than PSO NPs as a catalyst toward the oxygen evolution reaction (OER). The kinetic OER models of PSO and PSOB NPs are quite different as displayed by their different Tafel slopes. Interestingly and as another advantage, the PSOB sample is more conducting with low impedance value than the PSO counterpart. With all these advantages due to high oxygen vacancies induced by Bi 3+ doping, PSOB NPs have a great potential to be used as blue phosphors, charge storage devices, and capacitors.
Journal Article
Real-time Machine Vision System for the Visually Impaired
This work aims to provide a robust assistive system that uses the interface of a conversational chatbot to guide people who are blind in outdoor navigation. The proposed system will also be aware of situations where people close to the user are not wearing masks. We propose and analyze the effectiveness of a sophisticated system consisting of a mask detector, common objects detector and an obstacle avoidance system. The proposed system can be entirely hosted on a secure remote server and used on any smartphone with stable internet connectivity, with all the processing handled by the server. The responses each sub-system generates are transmitted back to the client, where the user listens to the response. The proposed system outperforms to detect masks with an accuracy of 99.51% and object detection with an 80.36% success rate, respectively.
Journal Article
