7 research outputs found
Social Awareness from Analysis of Available Time for Automated External Defibrillators in a City
Murata T., Fukushima A., Harada T., et al. Social Awareness from Analysis of Available Time for Automated External Defibrillators in a City. 2021 5th IEEE International Conference on Cybernetics, CYBCONF 2021, 45 (2021); https://doi.org/10.1109/CYBCONF51991.2021.9464135.In this paper, we conduct an investigation of available time for automated external defibrillators (AED) in a Japanese city. In Japan, there are about 600,000 AEDs available in cities or towns, but only 4.9% of AEDs are used by bystanders when citizens suffer a sudden cardiac arrest. One reason of such low usage rate comes from their available time. Since many AEDs are installed by business owners, they are not available when their business is closed. We investigate the available time of AEDs in a Japanese city, Takatsuki, Osaka Japan. The number of AEDs that are available 24 hours can be increased by installing new AEDs in 24-hour convenience stores and a koban that is a small police station with policemen
Adhesive Sulfabetaine Polymer Hydrogels for the Sandwich Cell Culture
Sandwich culture
systems are techniques that cultivate cells by
sandwiching them between the top and bottom substrates. Since the
substrates can be separated, the system is expected to be applied
to the construct layering of patterned cells and to the isolation
of stacked cells. In this study, we prepared hydrogels composed of
zwitterionic sulfabetaine polymers, poly[2-(2-(methacryloyloxyethyl)dimethylammonio)ethyl-1-sulfate]
(PZBMA). The ZBMA homopolymers have been shown to form aggregates
in aqueous solutions due to their intermolecular interactions. The
water content of the PZBMA hydrogels in water was ∼70% regardless
of N,N′-methylenebis(acrylamide),
BIS, content as the cross-linker. The results indicated that the intermolecular
interaction contributed more to the swelling behaviors than the chemical
cross-linker. However, PZBMA hydrogels with 0.1 mol % BIS showed not
only high elongation (∼850%) properties but also high adhesiveness
and self-healing properties. When this PZBMA hydrogel was impregnated
with collagen and subjected to sandwich culture using Madin–Darby
canine kidney (MDCK) cells, a three-dimensional morphology of MDCK
cell aggregates was constructed. Such a sulfabetaine hydrogel is expected
to be developed for regenerative medicine
Adhesive Sulfabetaine Polymer Hydrogels for the Sandwich Cell Culture
Sandwich culture
systems are techniques that cultivate cells by
sandwiching them between the top and bottom substrates. Since the
substrates can be separated, the system is expected to be applied
to the construct layering of patterned cells and to the isolation
of stacked cells. In this study, we prepared hydrogels composed of
zwitterionic sulfabetaine polymers, poly[2-(2-(methacryloyloxyethyl)dimethylammonio)ethyl-1-sulfate]
(PZBMA). The ZBMA homopolymers have been shown to form aggregates
in aqueous solutions due to their intermolecular interactions. The
water content of the PZBMA hydrogels in water was ∼70% regardless
of N,N′-methylenebis(acrylamide),
BIS, content as the cross-linker. The results indicated that the intermolecular
interaction contributed more to the swelling behaviors than the chemical
cross-linker. However, PZBMA hydrogels with 0.1 mol % BIS showed not
only high elongation (∼850%) properties but also high adhesiveness
and self-healing properties. When this PZBMA hydrogel was impregnated
with collagen and subjected to sandwich culture using Madin–Darby
canine kidney (MDCK) cells, a three-dimensional morphology of MDCK
cell aggregates was constructed. Such a sulfabetaine hydrogel is expected
to be developed for regenerative medicine