Search results for "CONSTRUCTION"
showing 10 items of 2670 documents
El dilema de la lechuza ¿Qué relación debe tener la filosofía con su historia?
2020
Resumen La historia parece tener una importancia especial en el campo de la filosofía, en pocas disciplinas encontramos tantas referencias a los autores y problemas del pasado. Sin embargo, esto puede ser una simple cuestión de hecho: hasta ahora hemos creído que enseñar la historia de la filosofía era formativo para los futuros filósofos, pero tal creencia puede cambiar. También podría ser una cuestión de puro interés profesional: algunos estudiamos la historia de la disciplina, y tratamos de justificar esa dedicación alegando que ésta puede ser útil, en cierta medida, para los pensadores contemporáneos. En este artículo, sin embargo, abogaré por una comprensión de nuestra historia como al…
Experimental testing of phase change materials in a warm-summer humid continental climate
2019
Abstract The construction industry (and buildings) is one of the largest energy consuming and CO2 emitting sectors in the world. To counter this, more lightweight structures are being used and energy saving applications are being developed. Phase change materials (PCM) are materials that can be considered to tackle these new challenges. It has been proven that PCMs can be passively used to improve the thermal mass of lightweight structures, which improves thermal comfort and reduces peak cooling and heating loads and therefore provides energy savings. To use these materials in an active way, they should be used together with ventilation, cooling or heating equipment, and collectors to accum…
Soil water erosion on road embankments in eastern Spain.
2007
Abstract Road embankments erosion is a serious problem in Spain. By means of simulated rainfall experiments (45 mm h − 1 during one hour on 0.41 m 2 plots) soil and water losses were measured on five road embankments located on the SW of the Valencia province, Spain. The bare road embankments, still under construction, contributed with 30 times more soil erosion than the vegetated ones. The measurements here presented demonstrate that road embankments are an important source of sediments, especially during the construction works, and it is recommended that restoration works should be undertaken after the road construction to reduce sediment removal, protect the road and avoid traffic accide…
Organic lacustrine sediment varves as indicators of past precipitation changes: a 3,000-year climate record from Central Finland
2015
Annually laminated (varved) sediments from Lake Kallio-Kourujärvi, Central Finland, provide high-resolution sedimentological data for the last three millennia. These varves consist of two laminae that represent (1) deposition during the spring-to-autumn growing season, composed of degraded organic matter and a variety of microfossils, and (2) deposition during winter, composed of fine-grained homogenous organic matter. Because of the absence of a clastic lamina, these varves differ from the typical, well-described, clastic-organic varve sequences in Fennoscandian lakes. Such organic varves in Finnish lakes have not been studied in detail before. Three thousand varves were counted and their …
Infilled frames: Developments in the evaluation of cyclic behaviour under lateral loads
2005
In order to consider the modified seismic response of framed structures in the presence of masonry infills, proper models have to be formulated. Because of the complexity of the problem, a careful definition of an equivalent diagonal pin-jointed strut, able to represent the horizontal force-interstorey displacement cyclic law of the actual infill, may be a solution. In this connection the present paper, continuing a previous work in which a generalised criterion for the determination of the ideal cross-section of the equivalent strut was formulated, analizes some models known in literature for the prediction of the lateral cyclic behaviour discussing their field of validity. As a support of…
Utvikling av verdikjeden oppstrøms for Trebyggeriet AS
2003
Hovedoppgave i Industriell økonomi og informasjonsledelse, Høgskolen i Agder, Grimstad Vi har i denne oppgaven sett på muligheten til å utvikle verdikjeden oppstrøms for en produsent av trekonstruksjoner. Trebyggeriet AS er en nyetablert bedrift lokalisert på Kjetså i Evje og Hornnes kommune. I produksjonen benyttes en datastyrt pre-cut maskin til å forme trelasten. Dette er en teknologi som ikke har vært benyttet før i Norge, men som har utviklet seg over en 10 – 15 års periode i Mellom-Europa. For å oppnå en effektiv vareflyt og minimale mengder avkapp av materialene kreves det andre egenskaper ved leveransene enn det som er vanlig i Norge i dag. I Tyskland, hvor denne teknologien har vær…
A Highly Luminescent Nitrogen-Doped Nanographene as an Acid- and Metal-Sensitive Fluorophore for Optical Imaging.
2021
Dibenzo[hi,st]ovalene (DBOV) has excellent photophysical properties, including strong fluorescence and high ambient stability. Moreover, the optical blinking properties of DBOV have enabled optical super-resolution single-molecule localization microscopy with an imaging resolution beyond the diffraction limit. Various organic and inorganic fluorescent probes have been developed for super-resolution imaging, but those sensitive to pH and/or metal ions have remained elusive. Here, we report a diaza-derivative of DBOV (N-DBOV), synthesized in eight steps with a total yield of 15%. Nitrogen (N)-bearing zigzag edges were formed through oxidative cyclization of amino groups in the last step. UV-v…
Un'ipotesi per la cattedrale di Iglesias
2015
This article focuses on the 3D virtual reconstruction of the first restoration project of the cathedral of San Maria in Iglesias (first half of 16th century). A complex work of renovation of the old medieval temple, which likely was meant to radically transform the presbytery of the church and to replace the previous timber roof truss of the nave with a simple ribbed vaults, as several clues seem to suggest. In the absence of archival data, the virtual reconstruction allowed to verify some hypotheses originated from the observation of material traces, ascribable to the construction phase of the building here analysed. Indirect proofs seem to suggest that a collapse, happened in an unspecifi…
Image analysis for detecting aggregate gradation in asphalt mixture from planar images
2012
Abstract The mechanical properties of bituminous mixture strongly depend on the gradation of the aggregate that represents the mineral skeleton of the mixture, since for open and gap-graded mixtures, stresses due to vehicles in movement on the pavement are mainly transmitted through their contacts. Internal structure of bituminous mixture is, therefore, of great interest for road and infrastructure engineering and it is appropriate to study it with recently developed image analysis method. The purpose of this study was to finalize an effective analysis of asphalt section image for automatically extracting aggregate gradation without the need of separation of the bitumen from the aggregate. …
HDR image generation from LDR image with highlight removal
2015
The emergency of High Dynamic Range (HDR) display device impels the study of generating HDR image from Low Dynamic Range (LDR) image. Most existing generation methods apply complicated handing to highlight areas in image, which perplexes the algorithm and introduces the probability of generating artifacts. In this paper, we investigate a separated scheme: instead of sophisticated treatment to the highlight areas during expanding, the processing to the highlight areas is separated from the dynamic range expansion, which facilitates the framework and reduces the artifacts. The image quality metric shows that the separated scheme reveals more details with little artifacts compared to the algor…