Approche de l'impact des matériaux bio-sourcés sur la qualité perçue des produits (cas de la fibre de lin)

Dans un contexte d éco-conception, les efforts d innovation amènent de nouveaux matériaux dits bio-sourcés qui participent à réduire l impact des produits sur l environnement. S agissant de nouveaux matériaux, l innovation porte également sur l amélioration de la qualité perçue par le consommateur. Le challenge est donc de concevoir des produits respectueux de l environnement à l aide de nouveaux matériaux écologiques tout en garantissant une qualité perçue au moins identique à celle des matériaux synthétiques classiques. Le design sensoriel, par l utilisation de l évaluation sensorielle, est l une des disciplines qui permet de prendre en compte le ressenti sensoriel des consommateurs. Cependant, dans la littérature, peu de travaux portent sur l application des méthodes d évaluation sensorielle à des matériaux bio-sourcés. Face à ce constat, nos travaux se proposent d étudier la possibilité d évaluer, avec des méthodes d analyse sensorielle, un matériau bio-sourcé à base de fibres de lin de la même manière qu un synthétique à base de fibres de verre. Plus précisément, nos travaux proposent une approche basée sur une évaluation sensorielle tactile et une évaluation instrumentale objective de la surface de ces deux matériaux. Nos résultats ont permis de valider l application des méthodes d évaluation sensorielle tactile sur un matériau bio-sourcé. Nos travaux ont permis la définition de profils sensoriels pour le toucher concernant le matériau à base de fibres de lin. Les résultats obtenus ont aussi permis de valider la possibilité de corréler certains indicateurs tactiles subjectifs avec des mesures instrumentales objectives. L ensemble des connaissances développées dans le cadre de ces travaux offre aux concepteurs une aide précieuse dans le choix des matériaux bio-sourcés en éco-conception et plus généralement en conception de produits.In the eco-design context, innovation efforts come with new bio-sourced materials that are meant to reduce products environmental impact. Insofar as these products are made with new materials, the innovation is also concerned about their perceived quality by consumers. More precisely, the challenge is to reach a compromise between environmental and marketing issues. Indeed, to be satisfying, the perceived quality of the environmental-friendly products has to be similar to the one of products made with classical synthetic materials. Sensorial design, through sensorial evaluation, is the academic discipline that takes into account the sensorial consumers perception. However, very few previous studies were led concerning the application of sensorial evaluation methods to bio-sourced materials. The present work proposes to make up for this lack of knowledge. More precisely, we evaluate both a flax fiber bio-sourced material and a glass fiber synthetic material using the same sensorial analysis methods. This evaluation combines a subjective sensorial tactile evaluation to an objective instrumental evaluation of both these materials surfaces. The results validated the application of tactile sensorial evaluation methods to a bio-sourced material. Moreover, tactile sensorial profiles were defined for flax fiber bio-sourced materials. Results also enabled to correlate subjective tactile measures with tactile objective instrumental measures. The present gathered knowledge offer, to designers concerned with eco-design and more generally by product design process, a new valuable bio-sourced material decision making aid.BELFORT-UTBM-SEVENANS (900942101) / SudocSudocFranceF

Complete genome sequence of Photobacterium ganghwense C2.2: A new polyhydroxyalkanoate production candidate

Polyhydroxyalkanoates (PHAs) are biodegradable bioplastics that can be manufactured sustainably and represent a promising green alternative to petrochemical-based plastics. Here, we describe the complete genome of a new marine PHA-producing bacterium—Photobacterium ganghwense (strain C2.2), which we have isolated from the Black Sea seashore. This new isolate is psychrotolerant and accumulates PHA when glycerol is provided as the main carbon source. Transmission electron microscopy, specific staining with Nile Red visualized via epifluorescence microscopy and gas chromatography analysis confirmed the accumulation of PHA. This is the only PHA-producing Photobacterium for which we now have a complete genome sequence, allowing us to investigate the pathways for PHA production and other secondary metabolite synthesis pathways. The de novo assembly genome, obtained using open-source tools, comprises two chromosomes (3.5, 2 Mbp) and a megaplasmid (202 kbp). We identify the entire PHA synthesis gene cluster that encodes a class I PHA synthase, a phasin, a 3-ketothiolase, and an acetoacetyl-CoA reductase. No conventional PHA depolymerase was identified in strain C2.2, but a putative lipase with extracellular amorphous PHA depolymerase activity was annotated, suggesting that C2.2 is unable to degrade intracellular PHA. A complete pathway for the conversion of glycerol to acetyl-CoA was annotated, in accordance with its ability to convert glycerol to PHA. Several secondary metabolite biosynthetic gene clusters and a low number of genes involved in antibiotic resistance and virulence were also identified, indicating the strain's suitability for biotechnological applications

Probiotics effect in prevention and treatment of atopic dermatitis and eczema in children

The composition of the intestinal microbiota plays an important role in the occurrence of allergies. Based on the immunomodulating capabilities of bacteria, various studies have investigated the potential role of probiotics in the prevention of eczema and atopic dermatitis in children. Atopic dermatitis (AD) is one of the first manifestations in the evolution of allergies, with a continuously increasing incidence worldwide. In the literature, various risk factors are described to play a role in the occurrence of DA, but the actual cause of the disease is still unknown. The intestinal flora seems to be involved in the development of AD, as patients with AD show quantitative, qualitative and functional changes. An imbalance of the human gut microbiota in the first years of life is a possible risk factor for immune-mediated disorders such as allergies. With the aim of modulating the gut microbiota, probiotic supplementation in the first months of life has been used to prevent allergic diseases in infants, with variable success. However, not much is known about the long-term consequences of the use of probiotics in the newborn on the composition of the gut microbiota. The aim of this paper is to highlight the positive links between the use of probiotics and the prevention or cure of eczema and atopic dermatitis

Gait Analysis Technologies for Evaluating Biomechanical Deviations: Insights from a Pilot Study on Healthy Athletes and Foot Deformities

Gait analysis is an essential tool for assessing musculoskeletal function and identifying biomechanical abnormalities. This study aimed to establish normative reference values for gait parameters in young, physically active individuals and to identify deviations associated with foot deformities. Methods: A cross-sectional observational study was conducted on 102 healthy young adults engaged in performance sports. Gait parameters were recorded using the RSscan plantar pressure distribution platform. Outlier identification methods were applied to exclude 12 participants with significant deviations, resulting in a final sample of 90 subjects. Descriptive statistics and comparative analyses were used to evaluate maximum force, impulse, load rate, and contact area across ten anatomical foot regions. Results: The final normative dataset established baseline values for plantar pressure distribution and biomechanical force dynamics. Among excluded participants, 33% exhibited pes planus (flatfoot), and one case presented pes cavus (high arch), both associated with altered pressure distributions and deviations in temporal gait parameters. Statistical comparisons confirmed significant variations in foot loading patterns and pressure maps (p<0.05). Conclusions: This study provides a comprehensive reference for gait parameters in young, healthy adults and highlights the clinical relevance of individualized gait assessments. The findings underscore the utility of plantar pressure analysis for early detection of biomechanical abnormalities that could contribute to musculoskeletal dysfunction. These insights can aid in the optimization of rehabilitation strategies, sports performance assessments, and orthopedic interventions. Clinical Implications: The results emphasize the need for targeted interventions in individuals with foot deformities to prevent long-term functional impairments. Future research should explore longitudinal implications of biomechanical deviations in active populations

Approche de l'impact des matériaux bio-sourcés sur la qualité perçue des produits : cas de la fibre de lin

In the eco-design context, innovation efforts come with new bio-sourced materials that are meant to reduce products’ environmental impact. Insofar as these products are made with new materials, the innovation is also concerned about their perceived quality by consumers. More precisely, the challenge is to reach a compromise between environmental and marketing issues. Indeed, to be satisfying, the perceived quality of the environmental-friendly products has to be similar to the one of products made with classical synthetic materials. Sensorial design, through sensorial evaluation, is the academic discipline that takes into account the sensorial consumers’ perception. However, very few previous studies were led concerning the application of sensorial evaluation methods to bio-sourced materials. The present work proposes to make up for this lack of knowledge. More precisely, we evaluate both a flax fiber bio-sourced material and a glass fiber synthetic material using the same sensorial analysis methods. This evaluation combines a subjective sensorial tactile evaluation to an objective instrumental evaluation of both these materials’ surfaces. The results validated the application of tactile sensorial evaluation methods to a bio-sourced material. Moreover, tactile sensorial profiles were defined for flax fiber bio-sourced materials. Results also enabled to correlate subjective tactile measures with tactile objective instrumental measures. The present gathered knowledge offer, to designers concerned with eco-design and more generally by product design process, a new valuable bio-sourced material decision making aid.Dans un contexte d’éco-conception, les efforts d’innovation amènent de nouveaux matériaux dits bio-sourcés qui participent à réduire l’impact des produits sur l’environnement. S’agissant de nouveaux matériaux, l’innovation porte également sur l’amélioration de la qualité perçue par le consommateur. Le challenge est donc de concevoir des produits respectueux de l’environnement à l’aide de nouveaux matériaux écologiques tout en garantissant une qualité perçue au moins identique à celle des matériaux synthétiques classiques. Le design sensoriel, par l’utilisation de l’évaluation sensorielle, est l’une des disciplines qui permet de prendre en compte le ressenti sensoriel des consommateurs. Cependant, dans la littérature, peu de travaux portent sur l’application des méthodes d’évaluation sensorielle à des matériaux bio-sourcés. Face à ce constat, nos travaux se proposent d’étudier la possibilité d’évaluer, avec des méthodes d’analyse sensorielle, un matériau bio-sourcé à base de fibres de lin de la même manière qu’un synthétique à base de fibres de verre. Plus précisément, nos travaux proposent une approche basée sur une évaluation sensorielle tactile et une évaluation instrumentale objective de la surface de ces deux matériaux. Nos résultats ont permis de valider l’application des méthodes d’évaluation sensorielle tactile sur un matériau bio-sourcé. Nos travaux ont permis la définition de profils sensoriels pour le toucher concernant le matériau à base de fibres de lin. Les résultats obtenus ont aussi permis de valider la possibilité de corréler certains indicateurs tactiles subjectifs avec des mesures instrumentales objectives. L’ensemble des connaissances développées dans le cadre de ces travaux offre aux concepteurs une aide précieuse dans le choix des matériaux bio-sourcés en éco-conception et plus généralement en conception de produits

Approach of bio-sourced materials impact on product's perceived quality : the case of flax fiber

Dans un contexte d’éco-conception, les efforts d’innovation amènent de nouveaux matériaux dits bio-sourcés qui participent à réduire l’impact des produits sur l’environnement. S’agissant de nouveaux matériaux, l’innovation porte également sur l’amélioration de la qualité perçue par le consommateur. Le challenge est donc de concevoir des produits respectueux de l’environnement à l’aide de nouveaux matériaux écologiques tout en garantissant une qualité perçue au moins identique à celle des matériaux synthétiques classiques. Le design sensoriel, par l’utilisation de l’évaluation sensorielle, est l’une des disciplines qui permet de prendre en compte le ressenti sensoriel des consommateurs. Cependant, dans la littérature, peu de travaux portent sur l’application des méthodes d’évaluation sensorielle à des matériaux bio-sourcés. Face à ce constat, nos travaux se proposent d’étudier la possibilité d’évaluer, avec des méthodes d’analyse sensorielle, un matériau bio-sourcé à base de fibres de lin de la même manière qu’un synthétique à base de fibres de verre. Plus précisément, nos travaux proposent une approche basée sur une évaluation sensorielle tactile et une évaluation instrumentale objective de la surface de ces deux matériaux. Nos résultats ont permis de valider l’application des méthodes d’évaluation sensorielle tactile sur un matériau bio-sourcé. Nos travaux ont permis la définition de profils sensoriels pour le toucher concernant le matériau à base de fibres de lin. Les résultats obtenus ont aussi permis de valider la possibilité de corréler certains indicateurs tactiles subjectifs avec des mesures instrumentales objectives. L’ensemble des connaissances développées dans le cadre de ces travaux offre aux concepteurs une aide précieuse dans le choix des matériaux bio-sourcés en éco-conception et plus généralement en conception de produits.In the eco-design context, innovation efforts come with new bio-sourced materials that are meant to reduce products’ environmental impact. Insofar as these products are made with new materials, the innovation is also concerned about their perceived quality by consumers. More precisely, the challenge is to reach a compromise between environmental and marketing issues. Indeed, to be satisfying, the perceived quality of the environmental-friendly products has to be similar to the one of products made with classical synthetic materials. Sensorial design, through sensorial evaluation, is the academic discipline that takes into account the sensorial consumers’ perception. However, very few previous studies were led concerning the application of sensorial evaluation methods to bio-sourced materials. The present work proposes to make up for this lack of knowledge. More precisely, we evaluate both a flax fiber bio-sourced material and a glass fiber synthetic material using the same sensorial analysis methods. This evaluation combines a subjective sensorial tactile evaluation to an objective instrumental evaluation of both these materials’ surfaces. The results validated the application of tactile sensorial evaluation methods to a bio-sourced material. Moreover, tactile sensorial profiles were defined for flax fiber bio-sourced materials. Results also enabled to correlate subjective tactile measures with tactile objective instrumental measures. The present gathered knowledge offer, to designers concerned with eco-design and more generally by product design process, a new valuable bio-sourced material decision making aid

INDUSTRIAL LIGHTING DESIGN IDEA: A NEW CONCEPT STYLE LAMP

Lighting fittings creates the sensations, the atmosphere and the feelings: an inspired choice can contribute decisively to the creation of great images in terms of interior design to a room. Either we talk about classic or modern luminaires, lamps or chandeliers, luxury or normal, only our imagination limits us to use ingenious light. Diversity desk lamp market is so big that it's hard to bring something innovative, but a rigorous analysis on the needs of people in terms of lighting, result in the development of products with forms of increasingly strange but that draw the attention of many. The purpose of this article is to develop a product design type unidiretional lamp equipped with remote this will fulfill the aim of the design, namely ‘product’. The directional lamp proposed is a luminaire with unique design, equipped with the latest characteristics

INFLUENCE OF GEOMETRY ON THE INJECTION PROCESS OF A COMPONENT USED IN THE PACKAGING PHASE OF HORIZONTAL REFRIGERATORS

In current global market, competition manufactures are forced to use different strategies to increase productivity and gain a competitive advantage. Any producer search possibilities of reducing the price/unit without compromising the functionality of the product and the quality expected by the client. This article is based on a case study of the injection process of a part used in the assembly of horizontal refrigerators. Discrepancy between supply and demand must be solved for the company has no delivery delays. In order to find efficient solutions for the process optimization it is necessary to examine step by step the entire production cycle

UNFOLDED REGULAR AND SEMI-REGULAR POLYHEDRA

This paper proposes a presentation unfolding regular and semi-regular polyhedra. Regular polyhedra are convex polyhedra whose faces are regular and equal polygons, with the same number of sides, and whose polyhedral angles are also regular and equal. Semi-regular polyhedra are convex polyhedra with regular polygon faces, several types and equal solid angles of the same type. A net of a polyhedron is a collection of edges in the plane which are the unfolded edges of the solid. Modeling and unfolding Platonic and Arhimediene polyhedra will be using 3dsMAX program. This paper is intended as an example of descriptive geometry applications

ANALYSIS AND MODELING OF GENEVA MECHANISM

The paper presents some aspects theoretical and practical based on the finite element analysis and modelling of Geneva mechanism with four slots, using the CATIA graphic program. This type of mechanism is an example of intermittent gearing that translates a continuous rotation into an intermittent rotary motion. It consists of alternate periods of motion and rest without reversing direction. In this paper, some design parameters with specify a Geneva mechanism will be defined precisely such as number of driving cranks, number of slots, wheel diameter, pin diameter, etc. Finite element analysis (FEA) can be used for creating a finite element model (preprocessing) and visualizing the analysis results (postprocessing), and use other solvers for processing