Steaming effects on selected wood properties of Turkey oak by spectral analysis

Turkey oak (Quercus cerris L.) is characterized by some technological and aesthetical factors limiting its market value from its great potential. In this study, the effect of direct and indirect steaming on reduction in equilibrium moisture content (EMC) and colour variations was evaluated using a hyperspectral radiometer. Steaming treatments were carried out at 80C for 48 h, and 120C for 18 and 24 h, showing a reduction in EMC in the order of 8.1, 28.5 and 13.5, respectively, as well as very significant lightness (L*) and hue (h) modifications in comparison with untreated specimens. The spectral signature analysis confirmed that hydrothermal treatments modify wood sensibility to the light source in the entire spectrum range. The study supports the validity of hydrothermal treatments for improving technological and aesthetical properties of Turkey oak

METAL REPLACEMENT WITH POLYMERS IN PROFESSIONAL FOOD PROCESSING APPLIANCES

Metal replacement is one of the most promising solutions in industrial appliances, both to save money, reduce weight and increase competitiveness on market. Polymers in cooking environments are risky materials if exposed to heat and fire, and flame retardant additives and fire behaviour are key points that has to be considered before replace metals and in general in initial materials selection during appliances project and production

Editorial: Management and Treatment of Pilonidal Disease: 189 Years After Mayo

...Pilonidal Disease (PD) was first scientifically reported 189 years ago by Herbert Mayo, back in 1833, as a sinus containing hair follicles located in the sacrococcygeal region of a female patien

Materials selection for food processing professional appliances

Professional appliances are characterized by an intense use in harsh environments; therefore, they need to communicate, through materials sensorial attributes, robustness and reliability. During their lifetime, professional appliances face specific chemical compatibility problems related to daily contact with food chemicals and detergent compounds compliance, and to misuse practices. These products are developed as tailor-made solutions, designed to satisfy both client needs and usability, even in very specific operative conditions. For this reason, they are developed on one hand through a performance driven technical design process, and on the other through a sensorial oriented materials selection, to improve the user experience with the product. From the Ashby method, the implementation of a flexible materials selection process, able to match sensorial attributes with the real products performances, needs for improvements, due to the highly competitive professional appliances market. The most common design approach in the industrial production of business to business market appliances sees the designer and the engineer as separate figures, which compel respectively to the aesthetical and emotional issues and to the technical and performances requirements. Both these figures operate materials selection with two different perspectives: the lack of communication among the two roles is often due to the different levels of analysis of the process. Electrolux Professional is trying to overcome this limit using an innovative approach, being an appropriate environment to test new solutions. A unique selection method applied to real products, able to couple qualitative and quantitative properties, and to consider both the modification of the technical and chemical properties and the material sensorial perceptions along the products life, can be the driving force of an innovative materials selection approach. The related design process will be then integrated to reach in a unique step a concept that satisfies both the technical performances and the user perception requirements

Simulation of tillage systems impact on soil biophysical properties using the SALUS model

A sustainable land management has been defined as the management system that allows for production, while minimizing risk, maintaining quality of soil and water. Tillage systems can significantly decrease soil carbon storage and influence the soil environment of a crop. Crop growth models can be useful tools in evaluating the impact of different tillage systems on soil biophysical properties and on the growth and final yield of the crops. The objectives of this paper were i) to illustrate the SALUS model and its tillage component; ii) to evaluate the effects of different tillage systems on water infiltration and time to ponding, iii) to simulate the effect of tillage systems on some soil biophysical properties. The SALUS (System Approach to Land Use Sustainability) model is designed to simulate continuous crop, soil, water and nutrient conditions under different tillage and crop residues management strategies for multiple years. Predictions of changes in surface residue, bulk density, runoff, drainage and evaporation were consistent with expected behaviours of these parameters as described in the literature. The experiment to estimate the time to ponding curve under different tillage system confirmed the theory and showed the beneficial effects of the residue on soil surface with respect to water infiltration. It also showed that the no-tillage system is a more appropriate system to adopt in areas characterized by high intensity rainfal

Eléments orbitaux d'étoiles doubles: ADS 1345, 7730 et 8630

Nous présentons de nouveaux éléments orbitaux pour les étoiles doubles visuelles ADS 1345, 7730 et 8630. Ces éléments ont été obtenus en utilisant les dernières mesures que nous avons effectuées avec le tavelographe PISCO et le télescope Zeiss de 102 cm de Merate (Italie), et celles déjà disponibles dans la littérature

Eléments orbitaux d'étoiles doubles: ADS 684 et ADS 11956

Nous présentons de nouveaux éléments orbitaux pour les étoiles doubles visuelles ADS 684 et ADS 11956. Ces éléments ont été obtenus en utilisant les dernières mesures que nous avons effectuées avec le tavelographe PISCO et le télescope Zeiss de 102 cm de Merate (Italie), et celles déjà disponibles dans la littérature

An international survey exploring the management of pilonidal disease

AIM: Pilonidal disease (PD) is a common debilitating condition frequently seen in surgical practice. Several available treatments carry different benefit/risk balances. The aim of this study was to snapshot the current management of PD across European countries.METHOD: Members affiliated to the European Society of Coloproctology were invited to join the survey. An invitation was extended to others via social media. The predictive power of respondents' and hospitals' demographics on the change of therapeutic approach was explored.RESULTS: Respondents (n = 452) were mostly men (77%), aged 26-60 years, practising in both academic and public hospitals and with fair distribution between colorectal (51%) and general (48%) surgeons. A total of 331 (73%) respondents recommended surgery at first presentation of the disease. Up to 80% of them recommended antibiotic therapy and 95% did not use any classification of PD. A primary closure technique was the preferred procedure (29%), followed by open technique (22%), flap creation (7%), sinusectomy (7%) and marsupialization (7%). Approximately 27% of subjects would choose the same surgical technique even after a failure. Almost half (46%) perform surgery as office based. A conservative approach was negatively associated with acutely presenting PD (p &lt; 0.001). Respondents who were not considering tailored surgery based on patient presentation tended to change their approach in the case of a failed procedure.CONCLUSION: With the caveat of a heterogeneous number of respondents across countries, the results of our snapshot survey may inform the development of future guidelines.</p

An international survey exploring the management of pilonidal disease

AIM: Pilonidal disease (PD) is a common debilitating condition frequently seen in surgical practice. Several available treatments carry different benefit/risk balances. The aim of this study was to snapshot the current management of PD across European countries.METHOD: Members affiliated to the European Society of Coloproctology were invited to join the survey. An invitation was extended to others via social media. The predictive power of respondents' and hospitals' demographics on the change of therapeutic approach was explored.RESULTS: Respondents (n = 452) were mostly men (77%), aged 26-60 years, practising in both academic and public hospitals and with fair distribution between colorectal (51%) and general (48%) surgeons. A total of 331 (73%) respondents recommended surgery at first presentation of the disease. Up to 80% of them recommended antibiotic therapy and 95% did not use any classification of PD. A primary closure technique was the preferred procedure (29%), followed by open technique (22%), flap creation (7%), sinusectomy (7%) and marsupialization (7%). Approximately 27% of subjects would choose the same surgical technique even after a failure. Almost half (46%) perform surgery as office based. A conservative approach was negatively associated with acutely presenting PD (p &lt; 0.001). Respondents who were not considering tailored surgery based on patient presentation tended to change their approach in the case of a failed procedure.CONCLUSION: With the caveat of a heterogeneous number of respondents across countries, the results of our snapshot survey may inform the development of future guidelines.</p

LCA of a Proton Exchange Membrane Fuel Cell Electric Vehicle Considering Different Power System Architectures

Fuel cell electric vehicles are a promising solution for reducing the environmental impacts of the automotive sector; however, there are still some key points to address in finding the most efficient and less impactful implementation of this technology. In this work, three electrical architectures of fuel cell electric vehicles were modeled and compared in terms of the environmental impacts of their manufacturing and use phases. The three architectures differ in terms of the number and position of the DC/DC converters connecting the battery and the fuel cell to the electric motor. The life cycle assessment methodology was employed to compute and compare the impacts of the three vehicles. A model of the production of the main components of vehicles and fuel cell stacks, as well as of the production of hydrogen fuel, was constructed, and the impacts were calculated using the program SimaPro. Eleven impact categories were considered when adopting the ReCiPe 2016 midpoint method, and the EF (adapted) method was exploited for a final comparison. The results highlighted the importance of the converters and their influence on fuel consumption, which was identified as the main factor in the comparison of the environmental impacts of the vehicle