Search results for "Ratio"
showing 10 items of 33258 documents
Preliminary photochemical studies of fluorene in various aqueous media
2014
- The current study investigates the direct photochemical degradation of aqueous fluorene with the aid of a 125W polychromatic medium, pressure Hg lamp. The purpose was to test the effectiveness of the lamp in irradiation using fluorene spiked solution as substrate. A 700 ml volume of fluorene solution of 0.002 mg/l was irradiated batch-wise at 1, 3, 6, 12, 18, 24 and 48 h. The amount of fluorene removal was studied for fluorene solutions prepared from , neutral (distilled water), acidic (by adjusting pH with hydrochloric acid, HCl), basic (by adjusting pH with sodium hydroxide, NaOH) and saline (addition of sodium chloride, NaCl) solutions and there was 95.95, 92.35, 96.65 and 97.15 % remo…
La conception des entités dans le cadre conceptuel de l’IASB
2010
National audience; Dans son souci de se rapprocher de la normalisation américaine et d’éviter un décalage croissant entre son cadre conceptuel datant de 1989 et les normes comptables internationales les plus récentes, l’IASB vient de publier un exposé sondage sur la notion d’entité comptable (reporting entity). Les propositions faites tendent à se rapprocher du modèle d’ultra- libéralisme financier incarné par la théorie de l’agence, en l’éloignant du modèle des parties prenantes plus respectueux des besoins d’information de la diversité des acteurs économiques. Néanmoins, la richesse de la doctrine comptable laisse ouvertes des possibilités d’évolutions qu’il conviendrait de maintenir et n…
Pourquoi trouve-t-on des entrepreneurs d'opportunités dans des secteurs associés à l'entrepreneur de nécessité
2021
International audience
La question de l’argent au cœur des pratiques d'échange de maison, proposition d’un cadre de recherche
2021
International audience
Autour de la Bellevilloise : la coopération communiste entre les deux guerres
2001
A Multi objective inventory model for short food supply chains
2017
Over the past 50 years, vertically integrated multinationals dominated global food markets by providing huge product diversity at low prices. Such systems are characterized by long supply chains capable of achieving high cost efficiencies resulting from the use of cheap raw materials, high chemical inputs, industrial shelf-life extension processes, economies of scale and mechanization. This dominant position on the market, however, has been achieved at a heavy cost on the global environment, generated by massive food wastage, and by a steady supply of fossil fuels. For such reasons, global supply chains are considered unsustainable and new food systems are being promoted in order to replace…
Heat-transfer performance comparison between overlapped and woven spacers for membrane distillation
2016
Sustainable production of fresh water from seawater desalination is a problem of crucial importance nowadays. Recently, some desalination technologies are taking advantage from the coupling with renewable resources. Among emerging technologies, Membrane Distillation (MD) is considered as one of the most promising as it can be easily powered by solar thermal energy or waste-heat. As an emerging technology, efforts are required to optimize MD unit geometry and operating conditions in order to reduce fresh water production specific cost. Temperature polarization phenomenon is a well-known detrimental effect for the MD process. Spacers are traditionally used to enhance mixing and shrink tempera…
Effect of two distinct implant macro-designs on the osseointegration of bicortically installed implants in two topographic sites. A histomorphometric…
2019
Antecedentes científicos y objetivos de estudio: El uso de implantes dentales como alternativa para la rehabilitación oral ha demostrado su eficacia y mostrando altas tasas de supervivencia. Un aspecto clave de la osteointegración del implante dental está relacionado con la obtención de una estabilidad primaria adecuada, asegurada por el enclavamiento mecánico entre el tejido óseo y la interfaz del implante, la cual depende en parte de la geometría del implante, la rugosidad de la superficie y la técnica quirúrgica para la preparación del lecho implantario. Varios factores están involucrados en la interacción entre la superficie del implante y el hueso nativo circundante durante la osteoint…
Précis de fiscalité des entreprises : 2016-2017
2016
National audience; no abstract
Old towns in “smart cities” between conservation and metamorphosis. Pending European Union guidelines
2014
In reflecting upon the role of environmental capital as represented by old towns in smart cities, the author reveals the consequences of re-plastering the facade of ancient buildings while emphasizing the resulting risk of globalization of historic districts. This is followed by a critical consideration concerning the active protection of old towns and their cultural typicality and geographical context, prerequisites for the development of specific guide-lines for the European Union. Explanation is also provided about how the restoration dynamics of the old towns are irreversibly changing the urban landscape in European cities. Strict regulations regarding the preservation of European old t…