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Schlagworte
Varying mindsets in Design Thinking. Why they change during the process and how to nudge them
(2019)
Zusammenfassung: Eine umfassende Literaturrecherche (Comprehensive Literature Search, CLS) bezeichnet eine umfangreiche und aufwändige Recherche mit dem Ziel, möglichst alle Studien zur Beantwortung einer zugrundeliegenden Forschungsfrage im Rahmen einer systematischen Übersichtsarbeit zu identifizieren. Konkrete Empfehlungen oder eine Definition des Begriffs CLS gibt es jedoch nicht. Der vorliegende Beitrag führt in eine Rahmung der CLS ein, stellt die damit einhergehenden Herausforderungen dar und weist auf methodische Implikationen sowie mögliche zukünftige Forschungsbereiche hin.
In this study, we carried out the structural and thermal characterization of a medical-grade poly (lactide) (PLA) by SEC, TGA, DSC, NMR, ICP-MS and Py-GC/MS. Moreover, we investigated the laser-induced degradation occurring when ultrashort laser pulses (ULP) were employed to cut extremely thin polymer films prepared by solvent-casting. ULP polymer cutting technology is an interesting manufacturing process for its advantages in potential medical applications. In fact, heat transmission to the region surrounding the cuts is limited, so that the incisions are precise and the effects on the regions around them are small. In this way, the need for post-processing is reduced and ULP cutting becomes interesting for industrial applications. However, degradation induced by ULP may occur and compromise the properties of the polymer samples. To investigate this possibility, portions of PLA films, ultrashort laser cut (ULC) and uncut, were analysed by SEC, DSC, NMR and FTIR. Furthermore, PLA oligomers were studied by ESI-MS. Both SEC and NMR showed a decrease in the molecular weight. FTIR, ESI-MS and NMR spectra revealed the presence of olefin end groups originated from a \beta-H transfer mechanism, induced by heat and/or light (Norrish II mechanism). Additionally, the inspection of the ESI mass spectra highlighted the cleavage of ester bonds related to the Norrish I type mechanism, undetected by the other techniques.
Concept of probabilistic modeling for real-time prediction of product quality and design automation
(2018)
Marketing strategies
(2018)
Japanese foreign direct investment in Thailand: promoting an ‘interactive’ institutional approach
(2018)
Chancen zum Lernen nutzen
(2018)
Designkritik ist zumeist einfach die Geste der Verweigerung oder Ignoranz. Eine erste Annäherung
(2018)
Zusammenarbeit
(2018)
Black titanium dioxide in situ generated on femtosecond laser induced periodic surface structures
(2018)
A covariance matrix self-adaptation evolution strategy for optimization under linear constraints
(2018)
Ultrafast-laser manufacture of radially emitting optical fiber diffusers for medical applications
(2018)
Praxis und/oder Theorie
(2018)
