Search results for "structures"
showing 10 items of 4815 documents
Patterning of supported gold monolayers via chemical lift-off lithography
2017
The supported monolayer of Au that accompanies alkanethiolate molecules removed by polymer stamps during chemical lift-off lithography is a scarcely studied hybrid material. We show that these Au–alkanethiolate layers on poly(dimethylsiloxane) (PDMS) are transparent, functional, hybrid interfaces that can be patterned over nanometer, micrometer, and millimeter length scales. Unlike other ultrathin Au films and nanoparticles, lifted-off Au–alkanethiolate thin films lack a measurable optical signature. We therefore devised fabrication, characterization, and simulation strategies by which to interrogate the nanoscale structure, chemical functionality, stoichiometry, and spectral signature of t…
Associations of near work time, watching TV, outdoors time, and parents' myopia with myopia among school children based on 38-year-old historical dat…
2021
Purpose To study the prevalence and risk factors of myopia with data from a questionnaire study conducted in 1983 among Finnish school children. Methods School children (n = 4 961) from the 1st, 5th and 8th grades of school (7-, 11- and 15-year-olds) in Central Finland were screened for vision followed by a questionnaire, which was returned by 4 352 (87.7%) participants. Myopia was categorized based on the questionnaire. Items concerned daily time spent on near work and outdoor activities, excluding time spent at school, watching TV and parental myopia and the associations of myopia with these factors were studied. Results The prevalence of myopia was 3%, 15% and 27% among the 7-, 11- and 1…
IMI Prevention of Myopia and Its Progression
2021
The prevalence of myopia has markedly increased in East and Southeast Asia, and pathologic consequences of myopia, including myopic maculopathy and high myopia-associated optic neuropathy, are now some of the most common causes of irreversible blindness. Hence, strategies are warranted to reduce the prevalence of myopia and the progression to high myopia because this is the main modifiable risk factor for pathologic myopia. On the basis of published population-based and interventional studies, an important strategy to reduce the development of myopia is encouraging schoolchildren to spend more time outdoors. As compared with other measures, spending more time outdoors is the safest strategy…
Observation of the Early Structural Changes Leading to the Formation of Protein Superstructures.
2014
Formation of superstructures in protein aggregation processes has been indicated as a general pathway for several proteins, possibly playing a role in human pathologies. There is a severe lack of knowledge on the origin of such species in terms of both mechanisms of formation and structural features. We use equine lysozyme as a model protein, and by combining spectroscopic techniques and microscopy with X-ray fiber diffraction and ab initio modeling of Small Angle X-ray Scattering data, we isolate the partially unfolded state from which one of these superstructures (i.e., particulate) originates. We reveal the low-resolution structure of the unfolded state and its mechanism of formation, hi…
2020 ESC Guidelines for the management of acute coronary syndromes in patients presenting without persistent ST-segment elevation
2020
2020 ESC Guidelines for the management of acute coronary syndromes in patients presenting without persistent ST-segment elevation
Fractal structures and environmental regulations in urban growth
1993
Aree verdi storiche e alberi monumentali: stimolo per un'efficace pianificazione delle infrastrutture verdi
2020
This study is based on the assumption that existing urban green areas can play a significant role in giving a boost to the effective development of linear infrastructures when conceived as green-blue corridors, capable to significantly affect in the production of the ecosystem services within the urban environment. The first phase of analysis, necessary to frame the case study, identified in the city of Palermo (Italy), the research focused on the ecological and social aspects of urban green, investigating its current values and potentials. The existing private and public parks and gardens have been combined with major areas of ecological relevance, whereas the monumental trees connect gree…
Defining polycentric urban areas through commuting cohesion. Through commuting cohesion in France
2013
International audience; Though the visualization of the daily commuting patterns around French urban area, we identify subcentres of commuting activities, illustrating the emergence of new urban polycentric structures. Via computed metrics on these graphs and an associated diachronic approach on the census data for the years between 1975 and 1999, we analyze the topological structure of the graph series. This analysis demonstrates the combined small world and star topology present in the data.
Projet urbain et Jeux Olympiques: le cas d'Athènes 2004
2005
Beyond the international sporting event they represent, Olympic Games are also a real catalyst for urban change they cause or accelerating. Indeed, they can be seen as an organizational tool, development and equipment of the host cities who have to service all Games a range of sports facilities , transport , accommodation ... that support the effective course of the global event . 2004 marks the return of the Olympic Games on the territory where they were born ; Athens hosted the first games of the third millennium . However, the Greek capital is a framework especially since this ancient city , archaeological and architectural history so rich, is also recent capital and the diachronic prove…
Enjeux métropolitains des nouveaux sites d'aéroports
2004
National audience