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Xiao, Yang,Poornesh, Kumar K.,Wendling, Loic,Cho, Chongdu Elsevier 2014 Materials letters Vol.124 No.-
Nafion N117 is a kind of polymer electrolyte membrane widely used as the ion exchange material in Ionic Polymer-Metal Composite (IPMC) actuators. The mechanical properties of N117 have a great effect on the performance of IPMC actuators. During the manufacturing of IPMC, the procedure includes heating/annealing, and soaking/drying. The membrane is very sensitive to temperature and humidity conditions, so we believe that returning to the initial conditions, irreversible variation of the mechanical properties has occurred during these treatments. This paper focuses on the effect of thermal and hygroscopic treatments on the mechanical responses of the Nafion N117 membrane. The results obtained from this study showed that no matter the thermal or hygroscopic treatments applied, it would decrease the elastic modulus and yielding stress. Furthermore, this decreasing was mainly showed in the intermolecular response. We also found the treated specimens regardless of thermal and hygroscopic treatments showed a sharp transition from elastic to plastic behavior. (C) 2014 Elsevier B.V. All rights reserved.
ISO26262를 접목한 MBSE Process 도입 사례
장현섭(Hyunseop(Hanson) Jang),이성훈(Sunghun Lee),박선홍(Sunhong(Sean) Park),남궁주(James Namgung),Scott Wendling 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
Today, A vehicle system design is becoming more and more complex because of the bigger potion of electrical part than yesterday. And vehicle level customer wants the project schedule to be less and a plenty of variants for 1 project. ISO26262, Which is a critical requirement about functional safety, also be required by customers. To meet these all requirement, we need state-of-the-art optimized system design, functional safety validation and verification, and so on. In this paper, we introduce the process based on model based system engineering and ISO26262 development procedure. It is required to change not only existing processes but also organization to correspond to ISO-26262 standard requirements effectively. When we develop a system following MBSE process, system effective analysis is easy cause of visualization of system. By doing so, an error from design change can be decreased and a quality problem can be prevented. And also there is an advantage of managing the traceability between a requirement and a design. We can inspect the logical errors and human errors by using automation functional of a software tool comparing with the ordinary method of system engineering. Auto-generated documentation is plus. This methodology is applied on development of EPS.
Forville Heloisa,Favoreto Michael Willian,Wendlinger Michel,Dias Roberta Micheten,Ferreira Borges Christiane Philippini,Reis Alessandra,Loguercio Alessandro D. 대한치과보존학회 2023 Restorative Dentistry & Endodontics Vol.48 No.4
Objectives: This study aimed to evaluate the bleaching efficacy and hydrogen peroxide permeability in the pulp chamber by the at-home bleaching gel in protocols applied on different dental surfaces. Materials and Methods: Forty premolars were randomly into 4 groups: control group no bleaching, only application on the buccal surface (OB), only application on the lingual surface (OL) and application in buccal and lingual surfaces, simultaneously (BL). At-home bleaching gel (White Class 7.5%) was used for the procedure. The bleaching efficacy was evaluated with a digital spectrophotometer (color change in CIELAB [ΔEab] and CIEDE 2000 [ΔE00] systems and Whitening Index for Dentistry [ΔWID]). The hydrogen peroxide permeability in the pulp chamber (µg/mL) was assessed using UV-Vis spectrophotometry and data were analyzed for a 1-way analysis of variance and Tukey’s test (α = 0.05). Results: All groups submitted to bleaching procedure showed bleaching efficacy when measured with ΔEab and ΔE00 (p > 0.05). Therefore, when analyzed by ΔWID, a higher bleaching efficacy were observed for the application on the groups OB and BL (p = 0.00003). Similar hydrogen peroxide permeability was found in the pulp chambers of the teeth undergoing different protocols (p > 0.05). Conclusions: The application of bleaching gel exclusively on the OB is sufficient to achieve bleaching efficacy, when compared to BL. Although the OL protocol demonstrated lower bleaching efficacy based on the ΔWID values, it may still be of interest and relevant in certain clinical scenarios based on individual needs, requiring clinical trials to better understand its specificities.
Comprehensive Characterization of Cancer Driver Genes and Mutations
Bailey, Matthew H.,Tokheim, Collin,Porta-Pardo, Eduard,Sengupta, Sohini,Bertrand, Denis,Weerasinghe, Amila,Colaprico, Antonio,Wendl, Michael C.,Kim, Jaegil,Reardon, Brendan,Kwok-Shing Ng, Patrick,Jeon Elsevier 2018 Cell Vol.174 No.4