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Daniele Grifoni,Graziana Roscigno,Enrica De Falco,Annapia Vece,Francesca Camilli,Francesco Sabatini,Luca Fibbi,Gaetano Zipoli 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8
Clothes are one of the most effective measures to minimize health hazards due to the current levels of UV radiationon the earth’s surface. Fabrics made of natural fibers and dyed with natural pigments are an excellent means to reduce UVexposure. In this study, the UV protection properties were tested on a vegetal fiber fabric (hemp) dyed with water extractsfrom madder, chestnut, onion, inula, and logwood, at three increasing concentrations. Dyeing extracts were obtained fromdifferent sources: agro-food industry residues (chestnut and onion), spontaneous (inula), and commercial dyeing plants(madder and logwood). The quantitative characterization of water dye extracts was performed to evaluate the amount of dyein pre- and post-dyeing solutions as well as the dye fastened to the fabric. The percentage values of dye fastened to the fabric,in relation to the plant dry weight, were relatively low for all the considered species. The fabric Ultraviolet Protection Factor(UPF) was evaluated using both a laboratory spectrophotometer and a spectroradiometer in outdoor conditions. Aprogressive increase in UPF with the increase of the dye-bath concentration was shown. Chestnut and onion, reaching theminimum protection level (UPF=15) at the highest dye-bath concentration, can be considered the most effective. The UPFpersistence of the fabrics was also evaluated after sun exposure and repeated washing. Colors and UV protective propertiesobtained by the dyeing procedure tested in this research can provide added value to hemp fabric and meet the demands of anexpanding “eco-friendly” market.
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Synergy of monitoring and security
Sara Casciati,Zhi Cong Chen,Lucia Faravelli,Michele Vece 국제구조공학회 2016 Smart Structures and Systems, An International Jou Vol.17 No.5
An ongoing research project is devoted to the design and implementation of a satellite based asset tracking for supporting emergency management in crisis operations. Due to the emergency environment, one has to rely on a low power consumption wireless communication. Therefore, the communication hardware and software must be designed to match requirements, which can only be foreseen at the level of more or less likely scenarios. The latter aspect suggests a deep use of a simulator (instead of a real network of sensors) to cover extreme situations. The former power consumption remark suggests the use of a minimal computer (Raspberry Pi) as data collector.
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