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Article ; Online: Interactions between work-related factors, perceived fatigue and musculoskeletal disorders among handicraft artisans: structural equation model analysis.

Das, Dipayan / Singh, Ashish Kumar

2024 , Page(s) 1–17

Abstract: The cross-sectional study aimed to investigate the relationship between work-related factors, perceived work fatigue (PWF) and musculoskeletal disorders (MSDs) among handicraft artisans. 364 artisans participated in a questionnaire survey, and a ... ...

Abstract	The cross-sectional study aimed to investigate the relationship between work-related factors, perceived work fatigue (PWF) and musculoskeletal disorders (MSDs) among handicraft artisans. 364 artisans participated in a questionnaire survey, and a structural equation model (SEM) was developed to explore the direct and indirect relationships between these factors using partial least squares analysis. The SEM explained 98.2% of the variance in MSDs and revealed that exposure to biomechanical factors had a direct impact on PWF and MSDs, with PWF mediating the effect of biomechanical factors on MSDs. Additionally, job demand was found to be positively associated with MSDs, while job control and social support reduced the risk of MSDs. The findings underscore the importance of strategic initiatives to mitigate the risk of developing MSDs among artisans. The study also highlights the potential of SEM as a novel framework for understanding the complex pathogenesis of MSDs in occupational health research.
Language	English
Publishing date	2024-01-08
Publishing country	England
Document type	Journal Article
ZDB-ID	1920-3
ISSN	1366-5847 ; 0014-0139
ISSN (online)	1366-5847
ISSN	0014-0139
DOI	10.1080/00140139.2023.2300952
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Article: Analysis of thermomechanical stresses in dual compound thick cylinders under asymmetric loads: An analytical and numerical method.

Das, Palash / Islam, Md Ashraful / Mondal, Dipayan

Heliyon

2024 Volume 10, Issue 3, Page(s) e24938

Abstract: This study presents a 2D comprehensive analytical and numerical analysis of the thermomechanical stresses in an unsymmetric dual compound thick cylinder under steady-state conditions. By employing mathematical analysis, this research aims to investigate ... ...

Abstract	This study presents a 2D comprehensive analytical and numerical analysis of the thermomechanical stresses in an unsymmetric dual compound thick cylinder under steady-state conditions. By employing mathematical analysis, this research aims to investigate the effectiveness of a 2D compound cylinder in reducing elastic and thermoelastic stresses. The temperature and displacement fields are thought to be dependent on the radial and circumferential directions, subject to asymmetric thermal and mechanical boundary conditions on the inner and outer surfaces. In this scenario, the Poisson ratio is considered to be a constant. The techniques of variable separation and complex Fourier series are employed analytically in the solution of heat conduction and Navier equations. The results obtained from the developed analytical method are compared and validated against those obtained from a finite difference method (FDM). The findings of this study suggest that the clamping of the outer layer has a significant influence on stress distribution in the structure, and the impact of tangential stress on the behavior of a compound cylinder is highly dominant. Furthermore, changes in temperature significantly influence hoop stress compared to variations in internal pressure levels. Moreover, the influence of internal pressure is relatively attenuated when a pressure vessel is fabricated utilizing different metals. In addition, the findings indicated that the configuration of layers and the location of the highest temperature had a significant impact on the performance of the vessel. Nevertheless, the technology provided has sufficient robustness to effectively address the complexities associated with the design of multilayered graded materials (GM) in additive manufacturing applications.
Language	English
Publishing date	2024-01-23
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2024.e24938
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Article ; Online: Ergonomic design and evaluation of gemstone polishing workstation.

Das, Dipayan / Singh, Ashish Kumar

International journal of occupational safety and ergonomics : JOSE

2022 Volume 29, Issue 4, Page(s) 1301–1318

Abstract: ... ...

Abstract	Objectives
MeSH term(s)	Humans ; Ergonomics/methods ; Upper Extremity/physiology ; Wrist ; Shoulder ; Muscle, Skeletal
Language	English
Publishing date	2022-09-27
Publishing country	England
Document type	Journal Article
ZDB-ID	1335568-5
ISSN	2376-9130 ; 1080-3548
ISSN (online)	2376-9130
ISSN	1080-3548
DOI	10.1080/10803548.2022.2120282
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Article ; Online: Microstructure and particle filtration behavior of multimodal filter media made of fibers of different shapes for automotive engine intake application

Yadav, Shivendra / Das, Dipayan

The Journal of The Textile Institute. 2023 July 3, v. 114, no. 7 p.986-997

2023

Abstract: This article describes microstructure of needle-punched nonwoven filter media comprising polyester fibers of different cross-sectional shapes and reports on their dynamic particle filtration behavior both at clean and clogging stages. The multicomponent ... ...

Abstract	This article describes microstructure of needle-punched nonwoven filter media comprising polyester fibers of different cross-sectional shapes and reports on their dynamic particle filtration behavior both at clean and clogging stages. The multicomponent fibrous filter media were characterized by their mean fiber shapes which were related to those of the individual components weighted by the corresponding mass fractions. In such media, the fibers of different cross-sectional shapes produced a synergistic effect on the gravimetric filtration efficiency at the clean stage. The fractional filtration efficiency was quite accurately expressed as a sum of fractional filtration efficiencies of individual components weighted by their surface area fractions. The evolution of pressure drop was explained in light of drag theory, and the role of fiber shape in determining the drag coefficient was discussed. Overall, the multimodal fibrous filter media prepared with fibers of different cross-sectional shapes showed a high potential for automotive engine intake application.
Keywords	drag coefficient ; evolution ; fabrics ; filtration ; microstructure ; polyesters ; surface area ; synergism ; Fibrous air filter ; engine intake filtration ; multimodal fiber shape distribution ; dynamic filtration behavior
Language	English
Dates of publication	2023-0703
Size	p. 986-997.
Publishing place	Taylor & Francis
Document type	Article ; Online
ISSN	1754-2340
DOI	10.1080/00405000.2022.2105070
Database	NAL-Catalogue (AGRICOLA)

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Article: Analytical and numerical (FEA) solution for steady-state heat transfer in generic FGM cylinder coated with two layers of isotropic material under convective-radiative boundary conditions.

Das, Palash / Islam, Md Ashraful / Mondal, Dipayan / Nazim, Md Sharier

Heliyon

2023 Volume 9, Issue 11, Page(s) e21725

Abstract: An investigation was carried out in order to develop an accurate analytical solution and a numerical (FEA) solution for steady-state heat transfer in a circular sandwich structure incorporated with convective-radiative boundary conditions. The ... ...

Abstract	An investigation was carried out in order to develop an accurate analytical solution and a numerical (FEA) solution for steady-state heat transfer in a circular sandwich structure incorporated with convective-radiative boundary conditions. The dimensional governing equations and boundary conditions were developed in the form of a 4th order algebraic equation, and then the solution was obtained using Ferrari's method. By solving for the roots of the quartic equation, we were able to determine the dimensionless temperature fields of the FG sandwich composite. The findings obtained utilizing the exact analytical solution for the FG sandwich composite under thermal loads were satisfactorily validated against those data obtained using the Galerkin finite element approximation. The impact of geometric and thermo-physical characteristics, such as Biot number
Language	English
Publishing date	2023-10-28
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2023.e21725
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Mechanism of Oxygen Reduction Reaction in Alkaline Medium on Nitrogen-Doped Graphyne and Graphdiyne Families: A First Principles Study.

Das, Bikram Kumar / Sen, Dipayan / Chattopadhyay, K K

Chemphyschem : a European journal of chemical physics and physical chemistry

2022 Volume 23, Issue 9, Page(s) e202100900

Abstract: Using extensive first principles protocols, a systematic investigation is performed to probe the oxygen reduction reaction (ORR) mechanism on nitrogen (N) doped graphynes (Gys, e. g. αGy, βGy, γGy and 6,6,12Gy) and graphdiyne (Gdy) in alkaline medium. We ...

Abstract	Using extensive first principles protocols, a systematic investigation is performed to probe the oxygen reduction reaction (ORR) mechanism on nitrogen (N) doped graphynes (Gys, e. g. αGy, βGy, γGy and 6,6,12Gy) and graphdiyne (Gdy) in alkaline medium. We considered both associative and dissociative pathways, as well as two distinct intermediate forks for each of them depending on the first protonation site(s). Following the dissociative approach, the activation energy to form an O
MeSH term(s)	Graphite ; Humans ; Nitrogen ; Oxidation-Reduction ; Oxygen
Chemical Substances	graphdiyne ; Graphite (7782-42-5) ; Nitrogen (N762921K75) ; Oxygen (S88TT14065)
Language	English
Publishing date	2022-03-23
Publishing country	Germany
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2025223-7
ISSN	1439-7641 ; 1439-4235
ISSN (online)	1439-7641
ISSN	1439-4235
DOI	10.1002/cphc.202100900
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Article ; Online: Role of dietary calcium and its possible mechanism against metabolic disorders: A concise review.

Das, Sandeep / Choudhuri, Dipayan

Journal of food biochemistry

2021 Volume 45, Issue 4, Page(s) e13697

Abstract: The global prevalence of metabolic disorders including hypertension, dyslipidemia, insulin resistance, nonalcoholic fatty liver, and cardiovascular diseases seemed to affect people of all ages cutting across the national, economic, and demographic ... ...

Abstract	The global prevalence of metabolic disorders including hypertension, dyslipidemia, insulin resistance, nonalcoholic fatty liver, and cardiovascular diseases seemed to affect people of all ages cutting across the national, economic, and demographic barrier. Therefore, the prevention of metabolic disorders is considered of paramount importance. The dietary role of nutrients including vitamins and minerals is one of the recommended preventive measures against metabolic disorders in modern society. Recently, dietary calcium, a common nutrient not only showed a beneficial effect against obesity through weight management, but also gained great attention against the risk of metabolic disorders. Though dietary calcium shows several beneficial effects against metabolic disorders but some inconsistent results were also reported. So, the present review aims to extract recent knowledge as well as their possible underlying mechanisms regarding the role of dietary calcium against metabolic disorders. The present review also discusses the negative impact as well as prospect of calcium intake on health issues. In summary, high calcium diet prevents the harmful consequences of metabolic disorders by regulating hormonal actions, alteration in intracellular calcium level, renin-angiotensin system, intestinal fat absorption, fecal fat excretion, lipid metabolism, carbohydrate metabolism, inflammation, and oxidative stress which together improve the metabolic health of an individual. PRACTICAL APPLICATIONS: Metabolic disorder is a global health issue across all sections of society and is growing rapidly in spite of several attempts by the scientific community to prevent it. Recently dietary calcium gained great attention in the last few years for its role in the management and treatment of metabolic disorders. The current review highlights the beneficial role of dietary calcium against several metabolic complications by exploring their underlying mechanisms at cellular level. This study will provide valuable information regarding the recommendation of dietary calcium in health policy as well as its inclusion in the dietary chart through calcium-rich foods and/or taking calcium supplements which can be a useful approach in preventing the risk of metabolic disorder depending on the health status of an individual.
MeSH term(s)	Calcium, Dietary ; Cardiovascular Diseases/epidemiology ; Cardiovascular Diseases/prevention & control ; Diet ; Humans ; Insulin Resistance ; Obesity
Chemical Substances	Calcium, Dietary
Language	English
Publishing date	2021-03-10
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	433846-7
ISSN	1745-4514 ; 0145-8884
ISSN (online)	1745-4514
ISSN	0145-8884
DOI	10.1111/jfbc.13697
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Article: Mechanical, thermo-mechanical and biodegradation behaviors of green-composites prepared from woven structural nettle (Girardinia diversifolia) reinforcement and poly(lactic acid) fibers

Nandi, Parna / Das, Dipayan

Industrial crops and products. 2022 Jan., v. 175

2022

Abstract: A driving force for rising demand in green composites is a growing necessity of cleaner environment. The green composites are increasingly being assessed for their efficacies as a structural material for a myriad of industrial applications. In the ... ...

Abstract	A driving force for rising demand in green composites is a growing necessity of cleaner environment. The green composites are increasingly being assessed for their efficacies as a structural material for a myriad of industrial applications. In the current work, a series of biocomposites was developed by using nettle (Girardinia diversifolia) woven fabric and poly(lactic acid) fibers in different mass fractions and employing compression molding technology. Thus prepared biocomposites were evaluated for their physical, mechanical, thermal, and biodegradation properties. The biocomposite prepared with equal mass fractions of nettle and poly(lactic) acid displayed the highest mechanical properties - tensile strength (39.87 MPa), Young’s modulus (4.37 GPa), flexural strength (50.96 MPa) and impact strength (35.95 kJ/m²). This biocomposite was found to be quite light-weight with a density of 1155 kg/m³. It exhibited excellent thermal stability with almost no weight loss till 309 °C and 98.57 % weight loss at 795 °C. It showed remarkable dynamic mechanical behavior with highest storage modulus (3.9 MPa), highest loss modulus (0.2 GPa), and lowest damping factor (0.04). It displayed excellent biodegradability with 10.57 % weight loss and 37.42 % strength loss just after 20 days of burial in soil. Overall, the biocomposite prepared from equal weight of nettle reinforcement and poly (lactic acid) matrix was very promising for automotive dashboard panel application.
Keywords	biocomposites ; biodegradability ; biodegradation ; impact strength ; loss modulus ; modulus of rupture ; soil ; storage modulus ; tensile strength ; thermal stability ; weight loss ; woven fabrics
Language	English
Dates of publication	2022-01
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1132158-1
ISSN	1872-633X ; 0926-6690
ISSN (online)	1872-633X
ISSN	0926-6690
DOI	10.1016/j.indcrop.2021.114247
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Risk factors associated with work-related musculoskeletal disorders among floor-sitting precision handicraft workers.

Das, Dipayan / Singh, Ashish Kumar

International archives of occupational and environmental health

2021 Volume 95, Issue 5, Page(s) 1129–1145

Abstract: Purpose: Precision handicraft workers are often exposed to stressful postures and poor working conditions while performing different jobs, that are directly associated with the development of musculoskeletal disorders (MSDs). This cross-sectional study ... ...

Abstract	Purpose: Precision handicraft workers are often exposed to stressful postures and poor working conditions while performing different jobs, that are directly associated with the development of musculoskeletal disorders (MSDs). This cross-sectional study aimed at evaluating the prevalence of MSDs and contributing risk factors among male precision handicraft workers. Methods: 334 handicraft workers involved in different precision activities: 125 gemstone cutters, 98 miniature painters, and 111 metal craft workers, were surveyed. Information about the prevalence of musculoskeletal symptoms and work-related factors was collected using the self-reported questionnaire and direct observation methods, viz. rapid upper limb assessment (RULA) and rapid entire body assessment (REBA). Chi-square test was performed to analyze the association of MSD symptoms between the handicraft occupations. Further, binary logistic regression was used to identify the potential risk factors for MSD symptoms among workers. Results: In all occupational groups, most participants reported high prevalence of MSDs primarily in the neck (61.6%), lower back (74.8%), and knee (54.7%) regions. Results revealed that age, work experience, prolonged work hours, sustained awkward posture, continuous work without break, extensive work pressure, and poor job control increased the risk of MSD symptoms in different body regions, while with a higher level of education, MSDs in the neck and lower back regions reduced. Conclusion: The findings indicated incompatibility between precision handicraft workers and the occupational environment. Logistic regression models showed significant contribution of physical and psychosocial work-related factors in developing MSD symptoms. Ergonomic interventions are imperative to evade adverse consequences on the occupational health of precision craft workers.
MeSH term(s)	Cross-Sectional Studies ; Ergonomics ; Humans ; Male ; Musculoskeletal Diseases/epidemiology ; Musculoskeletal Diseases/etiology ; Occupational Diseases/epidemiology ; Occupational Diseases/etiology ; Prevalence ; Risk Factors ; Sitting Position ; Surveys and Questionnaires
Language	English
Publishing date	2021-11-24
Publishing country	Germany
Document type	Journal Article
ZDB-ID	129038-1
ISSN	1432-1246 ; 0340-0131 ; 0367-9977
ISSN (online)	1432-1246
ISSN	0340-0131 ; 0367-9977
DOI	10.1007/s00420-021-01817-5
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Article ; Online: Green chemistry inspired formation of bioactive stable colloidal nanosilver and its wide-spectrum functionalised properties for sustainable industrial escalation

Dipayan Das / Subires Bhattacharyya / Monidipa Bhattacharyya / Palash Mandal

Results in Chemistry, Vol 4, Iss , Pp 100533- (2022)

2022

Abstract: Due to the existence of wide scale and diverse physical, chemical and biological properties colloidal silver nanoparticles has gained versatile application in various fields of engineering and bio-medical science. The conventional way for fulfilling the ... ...

Abstract	Due to the existence of wide scale and diverse physical, chemical and biological properties colloidal silver nanoparticles has gained versatile application in various fields of engineering and bio-medical science. The conventional way for fulfilling the global industrial demand of nanoparticle based silver products was its production through physical and chemical technology. In the last decade ecologist and environmentalist has continuously reported the hazardous impact of physical and chemical technology of nanoparticle synthesis over various ecosystem including rise in environmental pollution level. Despite of toxic effect, one cannot neglect the growing demand of nanosilver based lifestyle goods. Adaptation of green technology for synthesizing nanoparticles was the most convenient environmental friendly strategy as it is comparatively less toxic or non-toxic and eco-friendly to the living world. Beside this application of green synthesized silver nanoparticles within optimum dose are reported to have no harmful effect to the environment, as it contains different phyto-extract as capping and reducing agent. Toxicity level can also be controlled by process variation and characterization of green synthesized nanoparticles. Silver nanoparticle synthesized by green technology are continuously been used in horticultural industry, food packing industry, in the manufacture of sports goods, garment industry, cosmetic industry, medical and pharmaceutical industry. The current review deals with gradual transitional shift in synthesis of nanosilver from toxic physical and chemical method towards eco-friendly cost effective green synthesis methods using biological resources. The review contains detail literature investigation of silver nanoparticle “one of the most commercially exploded metallic nanoparticles”- its mode of synthesis; its gradual transformation towards eco-friendly synthesis approach; characterization and process optimization for better bio-activity along with its industrial application and commercial ...
Keywords	Green chemistry ; Eco-friendly Silver Nanoparticle ; Environmental toxicity ; Phyto-chemical ; Bioactivity ; Characterization ; Chemistry ; QD1-999
Subject code	540
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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