A5041126038- Cultural Heritage Materials Analysis
- Conservation Techniques and Studies
- Building materials and conservation
- Photonic and Optical Devices
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Historical, Literary, and Cultural Studies
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Historical Influence and Diplomacy
- Advanced Chemical Sensor Technologies
- German Literature and Culture Studies
- Medieval European History and Architecture
- Advanced Optical Network Technologies
- Analytical Chemistry and Chromatography
- Reformation and Early Modern Christianity
- Glycosylation and Glycoproteins Research
- Thermal and Kinetic Analysis
- Archaeology and ancient environmental studies
- Solid State Laser Technologies
- Odor and Emission Control Technologies
- Polymer composites and self-healing
- Photonic Crystal and Fiber Optics
- Analytical chemistry methods development
- NMR spectroscopy and applications
Getty Conservation Institute
2015-2024
J. Paul Getty Museum
1997-2023
Biogen (United States)
2020
Triangle
2020
King's College London
2017
Roche (Switzerland)
2017
Medical University of South Carolina
2008-2013
Leibniz Institute for Neurobiology
2010
Alcatel Lucent (Germany)
1991-2005
Technische Universität Braunschweig
2005
This paper reviews the work carried out under European ACTS KEOPS (KEys to Optical Packet Switching) project, centering on definition, development and assessment of optical packet switching routing networks capable providing transparency payload bit rate. The adopted approach uses packets fixed duration with low rate headers facilitate processing at network/node interfaces. concentrates networking concepts developed in project through a description implementation issues pertinent nodes...
This paper reviews the work carried out in ACTS KEOPS (Keys to Optical Packet Switching) project, describing results obtained date. The main objective of project is definition, development, and assessment optical packet switching routing networks, capable providing transparency payload bit rate, using packets fixed duration low rate headers order enable easier processing at network/node interfaces. feasibility concept assessed by modeling, laboratory experiments, testbed implementation nodes...
Identification of organic materials in Asian lacquers presents many challenges due to their complex formulations and the limited solubility main component, which is catechol-rich sap from three species Anacardiaceae trees that crosslinks form a hard film. Pyrolysis-gas chromatography–mass spectrometry with thermally assisted hydrolysis methylation using tetramethylammonium hydroxide (THM-Py-GC–MS) has been shown produce wide range marker compounds useful for identifying catechol components...
This work assesses the prospects for high-speed all-optical wavelength conversion using simple optical interaction with gain in semiconductor amplifiers (SOAs) via interband carrier recombination. Operation and design guidelines speeds above 10 Gb/s are described various tradeoffs discussed. Experiments at bit rates up to 40 presented both cross-gain modulation (XGM) cross-phase (XPM) SOAs demonstrating capability of these techniques.
Cellulose acetate, developed about 100 years ago as a versatile, semisynthetic plastic material, is used in variety of applications and perhaps best known the basis photographic film stock. Objects made wholly or partly from cellulose acetate are an important part modern contemporary cultural heritage, particularly museum collections. Given potential instability however, it imperative to understand aging mechanisms deterioration pathways ester plastics mitigate decomposition formulate...
<h2>Summary</h2> Transcytosis across the blood-brain barrier (BBB) regulates key processes of brain, but intracellular sorting mechanisms that determine successful receptor-mediated transcytosis in brain endothelial cells (BECs) remain unidentified. Here, we used Transferrin receptor-based Brain Shuttle constructs to investigate transport BECs, and uncovered a pathway for regulation transcytosis. By combining live-cell imaging mathematical modeling <i>in vitro</i> with super-resolution...
The nutrient-responsive β-O-linked N-acetylglucosamine (O-GlcNAc) modification of critical effector proteins modulates signaling and transcriptional pathways contributing to cellular development survival. An elevation in global protein O-GlcNAc occurs during the early stages osteoblast differentiation correlates with enhanced activity RUNX2, a key regulator osteogenesis. To identify other substrates transferase differentiating MC3T3E1 osteoblasts, O-GlcNAc-modified peptides were enriched by...
The terminal stages of neuronal degeneration and death in neurodegenerative diseases remain elusive. Autophagy is an essential catabolic process frequently failing neurodegeneration. Selective autophagy routes have recently emerged, including nucleophagy, defined as degradation nuclear components by autophagy. Here, we show that, a mouse model for the polyglutamine disease dentatorubral-pallidoluysian atrophy (DRPLA), progressive acquirement ataxic phenotype linked to severe cerebellar...
Abstract This work presents a comprehensive, multi-analytical scientific approach for determining the type of lacquer and artistic materials used by Jean Dunand on his “The Return Hunters” (1935). For this purpose, thermally assisted hydrolysis methylation – gas chromatography/mass spectrometry (THM-GC/MS), optical microscopy (OM) in visible (Vis) ultraviolet light (UV), scanning electron - energy-dispersive X-ray spectroscopy (SEM-EDX) were selected. Furthermore, novel application micro...
Abstract This investigation provides a meticulous examination of the organic materials employed in construction Qing Dynasty Coromandel lacquer screen housed at Jinhua Museum Zhejiang Province, China. Utilizing combination analytical techniques, including microscopic cross-sectional observations, systematic layer-by-layer sampling, and thermally assisted hydrolysis methylation pyrolysis gas chromatography / mass spectrometry (THM-Py-GC/MS), study has provided insights into complex material...
Abstract A quantitative approach to the study of Asian lacquer surfaces combining non-contact, non-invasive, and non-destructive surface metrology data science techniques is presented. The set lacquers within this artistic tradition–laccol, thitsi, urushi– combined with various additives, possess quantifiable differences in texture/topography that may be used detect identify a type from non-perturbing/contact measurements. This examined 15 different formulas laccol, urushi handmade test...
A standard procedure was developed for photographing painted objects with Kodak Ektachrome infrared film 2236. Artists' tube colors and pigment manufacturers' shade cards served as photographic subject material. During development of the procedure, consideration given to lighting, filtration, storage post-exposure control.
Cellulose acetate film plasticized with diethyl phthalate was subjected to artificial aging regimes and the loss of plasticizer determined by means Thermogravimetric Analysis Fourier-transform Infrared Spectroscopy. Alterations in strain hardening capability films monitored Dynamic Mechanical Analysis, connection between flexibility, degree plasticization investigated as a monitoring physical condition archival cellulose film. It found that higher content greater ability harden, therefore...
From a tomb in Upper Egypt we isolated strain of Penicillium chrysogenum that was capable producing brown pigment vitro when grown minimal salts medium containing tyrosine. We present evidence this is pyomelanin, compound known to assist the survival some micro-organisms adverse environments. tested type strains Pe . chrysogenum, which were also able produce under similar conditions. Inhibitors DHN and DOPA melanin pathways unable inhibit formation pigment. Fourier transform IR analysis...
Cellulose diacetate and cellulose triacetate cels from animated feature films in the collection of Walt Disney Animation Research Library were tested by several analytical techniques order to assess their composition look for evidence degradation. Triphenyl phosphate a range phthalate plasticizers identified using pyrolysis-gas chromatography/mass spectrometry, which also showed that evaporation more volatile may have occurred. Plasticizer content measurements solvent extraction, found be...
This article presents results from a binding media survey of 61 Romano-Egyptian paintings. Most the paintings (51) are better-known funerary mummy portraits created using either encaustic or tempera paint medium. Samples all (on wooden panels linen shrouds) were analyzed with gas chromatography/mass spectrometry (GC/MS) to identify waxes, fatty acids, resins, oils, and proteins in one sample. Analytical protocols that utilized three separate derivatization techniques developed. The first...
Simultaneous wavelength conversion and RZ to NRZ format at 40 Gbit/s is demonstrated by a monolithically integrated active Michelson interferometer. Excellent BER performance reported for the first time an interferometric converter operating Gbit/s.
AbstractAbstractThe properties of forty naturally aged papers taken from books dating 1477 to 1793 were assessed using two indicators paper condition: degree polymerization and yellowness index. These data interrelated with three variables that may impact long-term stability: pH, gelatin content, residual metals content. More stable specimens (high low index values) strongly associated high pH. High pH found contain lower amounts aluminum, potassium, sulfur, as well higher calcium magnesium....