DEBATS : Discussion sur les Effets du Bruit des Aéronefs Touchant la Santé.

Atelier « air, bruit et santé » de la concertation préalable Terminal T4 - Roissy Charles de Gaulle, PARIS, FRANCE, 29-/04/2019 - 29/04/2019Présentation des premiers résultats de DEBATS à l'Atelier « air, bruit et santé » de la concertation préalable Terminal T4 - Roissy Charles de Gaulle. Maison de l'Environnement de l'aéroport Roissy-CDG (France), 29 avril 2019

The effects of annoyance due to aircraft noise on psychological distress: Results of the DEBATS study in France

European Congress of Epidemiology 2018, LYON, FRANCE, 04-/07/2018 - 06/07/2018Background : Many studies have evidenced adverse effects of exposure to aircraft noise on health, such as annoyance, sleep disturbance, cardiovascular diseases or altered cognitive performance. Mental health has been less investigated. In France, about 18% of the population suffer from mental disorders. The effects of noise annoyance on psychological distress have rarely been evaluated, and no study exists in France. We investigated associations between annoyance due to aircraft noise and psychological distress for people living near airports in France. Methods : The DEBATS longitudinal study included 1,244 residents around three French airports: Paris-Charles-de-Gaulle, Toulouse-Blagnac, and Lyon-Saint-Exupéry. Information about psychological distress was assessed by a face-to-face questionnaire, including a single question about the feeling of depression, and the 12-version of the General Health Questionnaire (GHQ-12). Annoyance due to aircraft noise was assessed with the following question 'Thinking about the last 12 months, when you are at home, how much does aircraft noise annoy you?' The five-point verbal scale proposed by the International Commission on the Biological Effects of Noise was used: extremely, very, moderately, slightly or not at all. Associations with psychological distress were investigated using logistic regressions including relevant confounders such as gender, age, country of birth, occupational activity, marital status, alcohol consumption, smoking, sleep duration, number of stressful life events, education, income, and antidepressant use. Results : About 13% of the participants reported depression and 22% were considered to have psychological distress according to the GHQ-12. Significant associations were found between annoyance due to aircraft noise and the feeling of depression, and between annoyance due to aircraft noise and psychological distress evaluated with the GHQ-12. The Odds Ratio (OR) for the feeling of depression ranged from 0.89 (95% CI 0.50-1.59) to 2.61 (95% CI 1.09-6.23). The OR for the GHQ-12 ranged from 1.49 (95% CI 0.94-2.39) to 3.64 (95% CI 1.70-7.78). For the both outcomes, OR reached the maximum estimate for people reporting to be extremely annoyed compared to those who are not at all annoyed. Discussion : The present study found significant associations between annoyance due to aircraft noise and psychological distress assessed both with a single question about the feeling of depression and with the GHQ-12, with gradual ORs according to the different categories of noise annoyance. This result is in line with the findings of a cross-sectional study performed in Minneapolis. However the direction of the association can be questioned. Extremely annoyed people might be more at risk to have psychological disorders, and it is also possible that people with psychological disorders might be more at risk to be annoyed

Les effets de l'exposition au bruit des avions sur la qualité subjective du sommeil des riverains des aéroports français

22ème Journée Scientifique de l'EDISS, VILLEURBANNE, FRANCE, 12-/10/2017 - 12/10/2017Transport: major source of exposure to environmental nuisances for the population. Airplane noise exposure to airport neighborhoods resulting in public health problems and sleep disturbancesTransports : source majeure d'exposition à des nuisances environnementales pour la population. Exposition au bruit des avions aux voisinages des aéroports engendrant des problèmes de santé publique et des perturbations du sommei

Influence of pressing temperature on dynamics of strength of adhesive bond

Proučevali smo vpliv temperature stiskanja na utrjevanje urea-formaldehidnih (UF) lepil. Uporabili smo dve vrsti UF lepil proizvajalca Basf: Kaurit 345 z nižjo vsebnostjo prostega formaldehida in Kaurit 350 z višjo vsebnostjo. Preizkušanci so bili standardni in sicer iz javorjevega furnirja, debeline 0,6 mm. Preizkušanci so se po razrezu klimatizirali pri sobnih pogojih: 23 °C in 55 % vlažnostjo. Kinetiko utrjevanja UF lepil smo izvedli z ABES (Automated Bonding Evaluation System) instrumentom. Lepilna mešanica je bila skozi vse poizkuse konstantna, sestavljena iz 100 utežnih deležev vodne raztopine lepila in 1,5 % katalizatorja - amonijevega sulfata (glede na suho snov lepila). Testiranje je potekalo pri različnih temperaturah stiskanja: 80, 100, 120, 150, 170 °C. Trajanje stiskanja smo prilagajali glede na razvoj strižne trdnosti. Ko je ABES izmeril strižno trdnost večjo od 0, smo meritev pri enakem času stiskanja ponovili vsaj trikrat. Testirali smo tudi vpliv pH vrednosti različnih furnirjev na utrjevanje UF lepil. Ker katalizator zniža pH vrednost mešanice ter pospeši utrjevanje UF lepil, smo enak princip znižanja pH vrednosti ugotavljali s pomočjo različnih lesnih vrst. Vsaka lesna vrsta ima različno pH vrednost, ki tako dodatno pripomore k spremembi kislosti oz. bazičnosti lepilne mešanice med stiskanjem. Testirali smo preizkušance šestih različnih drevesnih vrst (javor, bukev, hrast, oreh, smreka, brest). S pomočjo termočlena smo raziskali spreminjanje temperature v lepilnem spoju med vročim lepljenjem. Ugotovili smo, da je imela temperatura stiskanja bistveni vpliv na hitrost utrjevanja lepila in da hlajenje preizkušanca po stiskanju ni vplivalo na trdnost spoja. Lepilo z višjim deležem formaldehida je utrjevalo hitreje.We studied the effect of pressing temperature on hardening of urea-formaldehyde (UF) adhesives. We used two types of UF adhesives pre-prepared by manufacturer Basf: Kaurit 345 with a lower content of free formaldehyde and Kaurit 350 with a higher content. For testing of kinetics, we used ABES (Automated Bonding Evaluation System) instrument. To preform standard tests, we used maple veneers, with thickness of 0,6 mm. All veneer was prepared and then left for two day at room conditions of 23 °C and 55 % air humidity, to acclimate. Every test has constant adhesive mixture, consisted of 100 weight units of aqueous adhesive solution and 1,5 % catalyst (ammonium sulphate) (according to dry quantity of glue). Bonding strength was investigated at different pressing temperatures: 80, 100, 120, 150 and 170 °C. Times of gluing were adjusted according to feedback of shear strength. If ABES measured sear strength higher than 0 N/mm2, we carried out at least two more tests of strength. pH value of wood was measured. With usage of different veneers, we tested its influence on bond development. For this test, we used six different species (maple, beech, oak, walnut, spruce, elm). With use of thermocouple we investigated temperature changes in bond during gluing process. We found out that the pressing temperature had a significant influence on hardening time. Cooling specimens after gluing process did not have big effect on joint strength. Adhesive with more formaldehyde was curing faster