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Publications (10 of 40) Show all publications
Garskaite, E., Bollen, M., Mulenga, E., Warlo, M., Bark, G., Olsen, E., . . . Sandberg, D. (2024). Assessing aspects of solution-based chemical synthesis to convert waste Si solar cells into nanostructured aluminosilicate crystals. CrystEngComm, 26(17), 2221-2334
Open this publication in new window or tab >>Assessing aspects of solution-based chemical synthesis to convert waste Si solar cells into nanostructured aluminosilicate crystals
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2024 (English)In: CrystEngComm, E-ISSN 1466-8033, Vol. 26, no 17, p. 2221-2334Article in journal (Refereed) Published
Abstract [en]

The end-of-life recycling of crystalline silicon photovoltaic (PV) modules and the utilisation of waste is of fundamental importance to future circular-economy societies. In the present work, the wet-chemistry synthesis route – a low-temperature dissolution–precipitation process – was explored to produce aluminosilicate minerals from waste c-Si solar cells. Nanostructured crystals were produced in an alkaline medium by increasing the reaction temperature from room temperature to 75 °C. The morphology of the produced crystals varied from nanolayered aggregates to rod-shaped crystals and was found to be dependent on the temperature of the reaction medium. Chemical and phase composition studies revealed that the synthesised compounds consisted of structurally different phases of aluminosilicate minerals. The purity and elemental composition of produced crystals were evaluated by energy dispersive spectroscopy (EDS) and micro X-ray fluorescence (μXRF) analysis, confirming the presence of Al, O, and Si elements. These results give new insights into the processing of aluminosilicate minerals with sustainable attributes and provide a possible route to reducing waste and strengthening the circular economy.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2024
Keywords
CT scan, Full-field data, Image processing, Moisture simulation, Mould estimation, Multivariate modelling
National Category
Environmental Sciences Materials Chemistry
Research subject
Wood Science and Engineering; Electric Power Engineering; Ore Geology
Identifiers
urn:nbn:se:ltu:diva-105217 (URN)10.1039/d4ce00038b (DOI)001199785500001 ()2-s2.0-85190326197 (Scopus ID)
Note

Validerad;2024;Nivå 2;2024-05-31 (signyg);

Funder: Rönnbäret Foundation, Skellefteå Municipality, Sweden (2022-2023)

Fulltext license: CC BY

Available from: 2024-04-23 Created: 2024-04-23 Last updated: 2024-07-04Bibliographically approved
Huang, Y., Buck, D., Chuchala, D., Fredriksson, M., Svensson, M. & Orlowski, K. A. (2023). Coupling of Local Wood Properties Extracted from X-ray Computed Tomography with Cutting Force. In: Gary S. Schajer (Ed.), Proceedings of the 25th International Wood Machining Seminar: . Paper presented at 25th International Wood Machining Seminar (IWMS-25), Nagoya, Japan, October 4-7, 2023. IWMS -25 Organizing Committee
Open this publication in new window or tab >>Coupling of Local Wood Properties Extracted from X-ray Computed Tomography with Cutting Force
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2023 (English)In: Proceedings of the 25th International Wood Machining Seminar / [ed] Gary S. Schajer, IWMS -25 Organizing Committee , 2023Conference paper, Published paper (Refereed)
Abstract [en]

While X-ray computed tomography (CT) is used extensively in sawmills, its primary applications are improving value-yield and process automation. Three-dimensional CT scanners have also been extensively used for log sorting and sawing optimisation. However, there is hardly any resent research utilising CT from a cutting process perspective. This study addresses this gap by adopting CT to investigate the correlation between local wood properties — namely density, knots and annual rings — and cutting forces. Cutting forces for clear-wood and knotty-wood specimens of Scots pine (Pinus sylvestris L.) followed the expected trend corresponding to the density profile: dense regions led to high cutting force while other regions caused low cutting forces. However, it was found that in addition to density, knot orientation relative to cutting direction, annual ring width along the cutting path, and annual ring angle in relation to the cutting direction were critical factors that influence the cutting process. This study illustrates the feasibility of coupling local wood properties obtained from CT data with cutting force, potentially inspiring further research on a variety of wood property/cutting force relationships.

Place, publisher, year, edition, pages
IWMS -25 Organizing Committee, 2023
Keywords
CT scanning, density profile, knot, Scots pine, cutting process
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-104207 (URN)
Conference
25th International Wood Machining Seminar (IWMS-25), Nagoya, Japan, October 4-7, 2023
Note

No fulltext license, permission to publish fulltext recieved separately.

Available from: 2024-02-06 Created: 2024-02-06 Last updated: 2024-05-30Bibliographically approved
Orlowski, K. A., Huang, Y., Chuchala, D., Buck, D., Stenka, D., Svensson, M. & Fredriksson, M. (2023). Cutting Forces for Clear and Knotty Pine Wood. In: Gary S. Schajer (Ed.), Proceedings of the 25th International Wood Machining Seminar: . Paper presented at 25th International Wood Machining Seminar (IWMS-25), Nagoya, Japan, October 4-7, 2023.
Open this publication in new window or tab >>Cutting Forces for Clear and Knotty Pine Wood
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2023 (English)In: Proceedings of the 25th International Wood Machining Seminar / [ed] Gary S. Schajer, 2023Conference paper, Published paper (Refereed)
Abstract [en]

Sawmill managers are interested in carrying out the sawmilling process in an efficient manner with minimal waste of raw material. In primary processing, an increase in productivity can be achieved if the process can be controlled. This can be achieved by developing a macro-mechanic model of the cutting power determination considered from a point of view of modern fracture mechanics has been developed. For the model knowledge about fracture toughness and shear yield stresses is vital. Pine wood (Pinus sylvestris L.) is a popular species which is widely used in wood industry in Poland and Sweden. Test samples with a cross section of 70 × 70 mm were originated from the both countries. Before sawing, all wood samples were scanned on X-ray Computed Tomography in laboratory conditions in Skellefteå (Sweden). These CT scans were helpful in indicating where clear and knotty samples were obtained from beams. Cutting tests were carried out on the custom-made laboratory stand in Skellefteå. The rotating arm held the wood sample, and the cutting speed equaled 15.5 ms−1. A stellite tipped tooth was fed into the wood sample with uncut chip thicknesses for clear wood 0.5; 0.7 and 1.1 mm, and for knotty wood 0.3; 0.5 and 0.7 mm. The tooth data: overall set equal to 2.9 mm, rake angle 27°, and clearance angle 12°. A piezoelectric sensor on the tooth holder measured the cutting forces. On the basis of the experimental findings it is possible to create mathematical models cutting forces for clear and knotty pine wood. For knotty wood the intercept is almost twice than for clear wood.

Keywords
wood provenance, pine wood, cutting, clear wood, knotty wood
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-105647 (URN)
Conference
25th International Wood Machining Seminar (IWMS-25), Nagoya, Japan, October 4-7, 2023
Note

No fulltext license, permission to publish fulltext recieved separately.

Available from: 2024-05-30 Created: 2024-05-30 Last updated: 2024-05-30Bibliographically approved
Yu, Y., Buck, D., Yang, H., Du, X., Song, M., Wang, J. & Zhu, Z. (2023). Cutting Power, Temperature, and Surface Roughness: A Multiple Target Assessment of Beech during Diamond Milling. Forests, 14(6), Article ID 1163.
Open this publication in new window or tab >>Cutting Power, Temperature, and Surface Roughness: A Multiple Target Assessment of Beech during Diamond Milling
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2023 (English)In: Forests, E-ISSN 1999-4907, Vol. 14, no 6, article id 1163Article in journal (Refereed) Published
Abstract [en]

Beech wood is a material commonly used for furniture, and cutting performance is the key to improving product quality and enterprise benefits. In this work, beech milling experiments using diamond cutters were carried out, and the changes in cutting power, temperature, and surface roughness were examined using the factor analysis method. The main results of this work are listed as follows: Firstly, a higher cutting speed and depth led to higher cutting power, temperature, and surface roughness. Meanwhile, cutting power and surface roughness were negatively related to the rake angle; however, cutting temperature first increased and then decreased with the increase in rake angle. Furthermore, cutting depth had greatest impact on the cutting power and surface roughness, followed by rake angle and cutting speed. Cutting speed had the greatest contribution to the cutting temperature, followed by cutting depth and rake angle. Only the cutting depth had a significant contribution to both cutting power, temperature, and surface roughness. Finally, optimal cutting parameters were determined to be a rake angle of 15°, cutting speed of 54 m/s, and depth of 0.5 mm. These values best meet the multiple objectives of lower cutting power, temperature, and surface roughness, which relate to superior product quality and enterprise benefits.

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
energy efficiency, cutting parameter, cutting power, design of experiments (DoE), multiple optimisation
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-97976 (URN)10.3390/f14061163 (DOI)001015379600001 ()2-s2.0-85164138977 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-06-07 (joosat);

Licens fulltext: CC BY License

Funder: National Natural Science Foundation of China [grant number 31971594]; Natural Science Foundation of the Jiangsu Higher Education Institutions of China [21KJB220009]; Qing Lan Project; International Cooperation Joint Laboratory for Production, Education, Research and Application of Ecological Health Care on Home Furnishing

Available from: 2023-06-07 Created: 2023-06-07 Last updated: 2024-07-04Bibliographically approved
Song, M., Buck, D., Yu, Y., Du, X., Guo, X., Wang, J. & Zhu, Z. (2023). Effects of Tool Tooth Number and Cutting Parameters on Milling Performance for Bamboo–Plastic Composite. Forests, 14(2), Article ID 433.
Open this publication in new window or tab >>Effects of Tool Tooth Number and Cutting Parameters on Milling Performance for Bamboo–Plastic Composite
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2023 (English)In: Forests, E-ISSN 1999-4907, Vol. 14, no 2, article id 433Article in journal (Refereed) Published
Abstract [en]

Cutting force and temperature are critical indicators for improving cutting performance and productivity. This study used an up-milling experiment to ascertain the effect of tool tooth number, cutting speed, and depth on the machinability of bamboo–plastic composite. We focused on the changes in the resultant force and cutting temperature under different milling conditions. A response surface methodology was used to build prediction models for the resultant force and temperature. A verification test was conducted to prove the model’s reliability. The empirical findings suggested that the number of tool teeth had the most significant impacts on both the resultant force and the cutting temperature, followed by the depth of cut and the cutting speed. Moreover, the resultant force and cutting temperature showed increasing trends with decreasing numbers of tool teeth and increasing cut depths. However, cutting speed had a negative relationship with the resultant force and a positive relationship with temperature. We also determined the optimal milling conditions with the lowest force and temperature: four tool teeth, 300 m/min cutting speed, and 0.5 mm depth. This parameter combination can be used in the industrial manufacture of bamboo–plastic composite to improve tool life and manufacturing productivity.

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
ANOVA, bamboo–plastic composite, cutting force, cutting temperature, optimization
National Category
Manufacturing, Surface and Joining Technology Production Engineering, Human Work Science and Ergonomics
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-95808 (URN)10.3390/f14020433 (DOI)2-s2.0-85148956785 (Scopus ID)
Funder
Luleå University of Technology
Note

Validerad;2023;Nivå 2;2023-03-07 (joosat);

Funder: National Natural Science Foundation of China (grant number 31971594); Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB220009); Nanjing Forestry University (nlzzyq202101); Technology Innovation Alliance of Wood/Bamboo Industry (TIAWBI2021-08); Qing Lan Project; International Cooperation Joint Laboratory for Production, Education, Research and Application of Ecological Health Care on Home Furnishing

Licens fulltext: CC BY License

Available from: 2023-03-07 Created: 2023-03-07 Last updated: 2024-07-04Bibliographically approved
Mellqvist, D., Buck, D. & Johansson, J. (2023). Experimental study of the effect of velocity on cutting forces for bevelled handsaw teeth. In: Gary S. Schajer (Ed.), Proceedings of the 25th International Wood Machining Seminar: . Paper presented at 25th International Wood Machining Seminar (IWMS-25), Nagoya, Japan, October 4-7, 2023. IWMS -25 Organizing Committee
Open this publication in new window or tab >>Experimental study of the effect of velocity on cutting forces for bevelled handsaw teeth
2023 (English)In: Proceedings of the 25th International Wood Machining Seminar / [ed] Gary S. Schajer, IWMS -25 Organizing Committee , 2023Conference paper, Published paper (Refereed)
Abstract [en]

Handsaws are well-established tools for wood processing. Handsaw tooth geometries havecustomarily been adapted for hand-held electric saws, which utilise higher cutting velocities. Fundamentalstudies in wood cutting mechanics suggest that a cutting velocity of up to 50 m s−1 has negligible effect onthe cutting forces acting on an orthogonal cutting tool. There is a lack of research on the mechanismsinvolved in the use of native handsaw teeth for wood cutting. This study investigates how cutting velocityaffects the forces acting on four bevel-ground cross-cutting teeth extracted from a handsaw blade.Conditioned specimens of Norway spruce [Picea abies (L.) Karst.] were used in the tests. The meandensities of wood specimens were assessed using X-ray computed tomography. Cutting tests wereperformed on a pre-existing, custom-made cutting-force test machine. Cutting data were collected usingpiezoelectric dynamometers linked to a data acquisition system. Cutting velocity was controlled by therotational speed of the arm holding the wood specimen. A customised software application logged andprocessed the forces acting on the teeth. The results show that the mean resultant force does not varysignificantly within a 2.5–15 m s−1 velocity range. The current study suggests that velocity is nearlyindependent of the system mean cutting force acting on bevelled handsaw teeth cutting across the grain.The findings are particularly relevant for developing cutting tools for wood applications since knowledgefrom handsaw tooth geometry can be adapted for the design of cutting blades for power tools.

Place, publisher, year, edition, pages
IWMS -25 Organizing Committee, 2023
Keywords
Cutting Force, Cutting Speed, Material Processing, Sawing, Wood Machining
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-105666 (URN)
Conference
25th International Wood Machining Seminar (IWMS-25), Nagoya, Japan, October 4-7, 2023
Note

No fulltext license, permission to publish fulltext recieved separately.

Available from: 2024-05-30 Created: 2024-05-30 Last updated: 2024-05-30Bibliographically approved
Wu, Z., Buck, D., Zhang, F., Yu, Y., Guo, X., Cao, P. & Zhu, Z. (2023). Finite element method and its application to cutting processes of stone–plastic composite. The International Journal of Advanced Manufacturing Technology, 129, 4491-4508
Open this publication in new window or tab >>Finite element method and its application to cutting processes of stone–plastic composite
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2023 (English)In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 129, p. 4491-4508Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Springer Nature, 2023
National Category
Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-102371 (URN)10.1007/s00170-023-12601-9 (DOI)2-s2.0-85176007630 (Scopus ID)
Funder
Luleå University of Technology
Note

Validerad;2023;Nivå 2;2023-12-05 (joosat);

Funder: National Natural Science Foundation of China (grant number 31971594); Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB220009); Self-Made Experimental and Teaching Instruments of Nanjing Forestry University in 2021 (nlzzyq202101); Technology Innovation Alliance of Wood/Bamboo Industry (TIAWBI2021-08); International Cooperation Joint Laboratory for Production, Education, Research and Application of Ecological Health Care on Home Furnishing

Available from: 2023-11-10 Created: 2023-11-10 Last updated: 2023-12-05Bibliographically approved
Zhu, Z., Buck, D., Wu, Z., Yu, Y. & Guo, X. (2023). Frictional behaviour of wood-Plastic composites against cemented carbide during sliding contact. Wood Material Science & Engineering, 18(3), 1127-1133
Open this publication in new window or tab >>Frictional behaviour of wood-Plastic composites against cemented carbide during sliding contact
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2023 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 18, no 3, p. 1127-1133Article in journal (Refereed) Published
Abstract [en]

This study provides guidelines for the industrial machining of wood-plastic composites, focusing on their behaviour under friction, specifically when friction is caused by sliding contact with cemented carbide. Using the response surface method (RSM) to explore the correlation between the friction coefficient and the wood-plastic composite type, loading force, and reciprocating frequency, a series of frictional tests were performed. The significant contributions of each factor and their two-factor interactions were determined by analysis of variance (ANOVA), with a significance level of 5%, while trends in the variation of the friction coefficient were investigated by using a response surface methodology. The wood-plastic composite types had the greatest impact on the friction coefficient, followed by loading force and reciprocating frequency. A mathematical model (CoF = −0.10 + 0.09ω−0.02f+0.01Fn−0.01ωf+2.38×10−3ωFn−2.00×10−4Fnf+0.11ω2+2.96f2−1.04×10−4Fn2) was developed to accurately predict changes in the friction coefficient during machining of such composites. According to the results of the optimisation, wood-plastic composite with polypropylene should be machined with high-speed cutting, whereas those with polyethylene and polyvinyl chloride are recommended for low-speed machining, so as to ensure the lowest friction coefficient.

Place, publisher, year, edition, pages
Taylor & Francis, 2023
Keywords
Coefficient of friction, industrial machining, WPC, ANOVA, RSM, optimisation
National Category
Production Engineering, Human Work Science and Ergonomics Manufacturing, Surface and Joining Technology
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-92837 (URN)10.1080/17480272.2022.2119432 (DOI)000850178600001 ()2-s2.0-85137837379 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-06-30 (joosat);

Funder: National Natural Science Foundation of China (31971594); Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB220009); the SelfMade Experimental and Teaching Instruments of Nanjing Forestry University in 2021 (nlzzyq202101); Technology Innovation Alliance of Wood/Bamboo Industry (TIAWBI2021-08); International Cooperation Joint Laboratory for Production, Education, Research and Application of Ecological Health Care on Home Furnishing

Available from: 2022-09-07 Created: 2022-09-07 Last updated: 2023-06-30Bibliographically approved
Wang, J., Buck, D., Tang, Q., Guan, J., Zhou, X., Wu, Z., . . . Zhu, Z. (2023). Machining Properties of Stone-Plastic Composite Based on an Empirically Validated Finite Element Method. Advanced Engineering Materials, 25(8), Article ID 2201386.
Open this publication in new window or tab >>Machining Properties of Stone-Plastic Composite Based on an Empirically Validated Finite Element Method
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2023 (English)In: Advanced Engineering Materials, ISSN 1438-1656, E-ISSN 1527-2648, Vol. 25, no 8, article id 2201386Article in journal (Refereed) Published
Abstract [en]

High-cutting performance is an essential metric for improving the suitability of materials for industrial applications. Herein, the machining properties of stone-plastic composite are assessed through a finite element method to explore orthogonal cutting behavior by diamond cutters. The key aspects examined in this work are the effects of tool geometry and cutting parameters on the cutting force, temperature, chip formation, von Mises stress, and surface quality finish. Primary findings show that chip continuity increases proportionally with increase in rake angle but decreases with cutting speed and depth. Meanwhile, both cutting stability and surface quality are negatively correlated with cutting speed and depth but positively correlated with rake angle. These results support the adoption of cutting conditions using greater rake angle, higher cutting speed, and shallower cutting depth to obtain higher cutting performance, that is, greater cutting stability and surface quality in the finishing machining of stone-plastic composites.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023
National Category
Manufacturing, Surface and Joining Technology
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-95746 (URN)10.1002/adem.202201386 (DOI)000934549600001 ()2-s2.0-85148066866 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-04-21 (joosat);

Funder: National Natural Science Foundation of China (31971594); Project Founded by the National First-ClassDisciplines (PNFD) of China; Natural Science Foundation of the Jiangsu Higher Education Institutions of China (21KJB220009); Self-Made Experimental and Teaching Instruments of Nanjing Forestry University in 2021 (nlzzyq202101); Qin Lan Project; Technology Innovation Alliance of Wood/Bamboo Industry (TIAWBI2021-08); nternational  Cooperation  Joint  Laboratory  for  Production,Education, Research and Application of Ecological Health Care on Home Furnishing

Available from: 2023-02-28 Created: 2023-02-28 Last updated: 2023-04-21Bibliographically approved
Buck, D., Wallentén, P., Sehlstedt-Persson, M. & Öhman, M. (2023). Moisture- and mould-resistance: multi-modal modelling leveraging X-ray tomography in edge-sealed cross-laminated timber. Materials & design, 230, Article ID 111967.
Open this publication in new window or tab >>Moisture- and mould-resistance: multi-modal modelling leveraging X-ray tomography in edge-sealed cross-laminated timber
2023 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 230, article id 111967Article in journal (Refereed) Published
Abstract [en]

Edge-sealing, which involves treating the edges of wood products, improves water resistance. This study investigated the feasibility of edge-sealed cross-laminated timber (CLT) panels to reduce capillary water uptake, thereby resisting mould formation. The water and vapour permeabilities of ten characteristically different single-layer sealant coating systems were systematically determined. Multi-modal assessment leveraged by computed tomography (CT) scanning methodology was used to enhance detection of material characteristics beyond the standard coating permeability assessment. Moisture content was observed to change during the specimens’ absorption and desorption depending on the sealant system applied. The results revealed different characteristics of coatings during the water absorption and desorption stages. Findings from this study were used to develop recommendations regarding the water resistance of coating systems, curing time, susceptibility to mould formation, and industrial applicability. Results suggest that edge-sealed CLT could minimise the risk of mould formation, which can occur at worksites with minimal weather protection. The method developed in this study provides a basis to evaluate new coating systems and determine which use case is the best for a particular coating type. This study also incorporates insights from industry to identify future research orientations, which may pave the way for new designs and assessment techniques.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
CT scan, Full-field data, Image processing, Moisture simulation, Mould estimation, Multivariate modelling
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
urn:nbn:se:ltu:diva-97626 (URN)10.1016/j.matdes.2023.111967 (DOI)001041731500001 ()2-s2.0-85159149308 (Scopus ID)
Note

Validerad;2023;Nivå 2;2023-05-29 (joosat);

Funder: TräCentrum Norr (TCN), [grant number 239268, 239278]; FORMAS project: Experimental Studies of Capillary Phenomena in Bio-based Materials [grant number 942-2016-64]

Licens fulltext: CC BY License

Available from: 2023-05-29 Created: 2023-05-29 Last updated: 2024-03-07Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0001-7091-6696

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