Versioning Cultural Objects : Digital Approaches

This volume approaches an understanding of the term versioning in the broadest sense, discussing ideas about how versions differ across forms of media, including text, image, and sound. Versions of cultural objects are identified, defined, articulated, and analysed through diverse mechanisms in different fields of research. The study of versions allows for the investigation of the creative processes behind the conception of works, a closer inspection of their socio-political contexts, and promotes investigation of their provenance and circulation. Chapters in this volume include discussion of what a “version” means in different fields, case studies implementing digital versioning techniques, conceptual models for representing versions digitally, and computational and management issues for digital projects

Chemical characterization of ambient aerosol collected during the northeast monsoon season over the Arabian Sea: Anions and cations

Ambient aerosol samples were collected over the Arabian Sea during the month of March 1997, aboard the German R/V Sonne, as part of the German JGOFS project (Joint Global Ocean Flux Study). This is the third study in a series of analogous measurements taken over the Arabian Sea during different seasons of the monsoon. Dichotomous high volume collector samples were analyzed for anions and cations upon return to the laboratory. Anthropogenic pollutant concentrations were larger during the first part of the cruise, when air masses originated over the Indian subcontinent. Total NSS‐SO42− concentrations amounted to 2.94 ± 1.06 μg m−3 of which 92.1 ± 4.5% was present in the fine fraction. NSS‐SO42− source apportionment analysis with multivariate linear regression models revealed that in the coarse fraction half is biogenically and half anthropogenically derived, while in the fine fraction only 6% seemed of biogenic origin and 84% anthropogenic and 10% crustal in nature. Chloride deficits up to 99.1% in the fine fraction were observed. The average Cl− deficit in the fine fraction was 89.0 ± 9.4%, potentially related to NSS‐SO42− acid displacement and Cl reactive species formation, while in the coarse fraction it was 25.6 ± 21.3%, with NO3− being the preferred species for acid displacement

Hot or cold ablation - that's the question: A special simulation tool includes thermal effects for the optimization of ultrafast laser applications in material processing

A new generation of ultrafast lasers with high average powers and high repetition rates is coming to the market. Those systems in principle bring together high precision processing and high throughput. But with high average power thermal effects show up the demand for a careful process planning. A new simulation tool from Fraunhofer ILT incorporates such effects and allows for precise process optimization even at high average laser power

Migrating Charters into the TEI P5

Abstract and poster of paper 0339 presented at the Digital Humanities Conference 2019 (DH2019), Utrecht , the Netherlands 9-12 July, 2019

Modelling pH-optimized degradation of microgel-functionalized polyesters

We establish a novel mathematical model to describe and analyze pH levels in the vicinity of poly(N-vinylcaprolactam-co-acetoacetoxyethyl methacrylate-co-N-vinylimidazole) (VCL/AAEM/VIm) microgel-functionalized polymers during biodegradation. Biodegradable polymers, especially aliphatic polyesters (polylactide/polyglycolide/polycaprolactone homo- and copolymers), have a large range of medical applications including delivery systems, scaffolds, or stents for the treatment of cardiovascular diseases. Most of those applications are limited by the inherent drop of pH level during the degradation process. The combination of polymers with VCL/AAEM/VIm-microgels, which aims at stabilizing pH levels, is innovative and requires new mathematical models for the prediction of pH level evaluation. The mathematical model consists of a diffusion-reaction PDE system for the degradation including reaction rate equations and diffusion of acidic degradation products into the vicinity. A system of algebraic equations is coupled to the degradation model in order to describe the buffering action of the microgel. The model is validated against the experimental pH-monitored biodegradation of microgel-functionalized polymer foils and is available for the design of microgel-functionalized polymer components

Investigation of the Origanum onites L. essential oil using the chorioallantoic membrane (CAM) assay

The in vivo test on the chorioallantoic membrane of the fertilized hen's egg (CAM assay) is a current method to determine antiangiogenic, antiinflammatory activity and toxic effects of individual compounds or complex plant extracts. The method is used for testing natural compounds in small amounts for revealing various modes of action and the complex mechanisms related to angiogenesis and inflammation. Furthermore, possible side effects such as membrane irritation, toxic, and anticoagulant properties of the investigated material in question can be detected. For the evaluation, the essential oil obtained by hydrodistillation of the aerial parts of Origanum onites L., a common spice and medicinal plant, was tested for its effect in the chorioallantoic membrane (CAM) assay. The essential oil composition was revealed by means of gas chromatography-mass spectrometry (GC-MS). Eighty three components were identified, representing 99.1% of the total oil. Carvacrol, thymol, p-cymene, and gamma-terpinene were found as major components and were also individually tested in the CAM assay. Along with the monoterpenes carvacrol and thymol, their methyl ether derivatives were also examined for comparison of their physiological action. Neither the essential oil nor its components showed any pronounced antiinflammatory or antiangiogenic property in the CAM assay, at 10-250 microg/pellet. However, the irritant effect of the essential oil was linked to thymol in a dose-response fashion, up to 10 microg/pellet, where it was still showing irritation