{"title":"Buckling analysis of angle-ply multilayered and sandwich plates using the enhanced Refined Zigzag Theory","authors":"M. Di Sciuva, M. Gherlone, M. Sorrenti","doi":"10.3176/proc.2022.1.08","DOIUrl":"https://doi.org/10.3176/proc.2022.1.08","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69932883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of 2-(S)-[(4-methylphenyl)sulfinyl]-2-cyclopenten-1-one, a D-ring precursor of 9,11-secosterols","authors":"M. Kõllo, K. Rõuk, M. Lopp","doi":"10.3176/proc.2022.4.01","DOIUrl":"https://doi.org/10.3176/proc.2022.4.01","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The signals in nerve include electrical, mechanical and thermal components and are characterized by the complexity of processes. The modelling of these signals is analyzed from the viewpoint of DeLanda who has demonstrated the possibility to expose the philosophical theories of Deleuze by using the notions from nonlinear dynamics. It is demonstrated that the mathematical modelling of processes in nerves by authors of this paper follows the general ideas of multiplicity and causal interactions described by DeLanda.
{"title":"Signals in nerves from the philosophical viewpoint","authors":"J. Engelbrecht, K. Tamm, T. Peets","doi":"10.3176/proc.2022.4.07","DOIUrl":"https://doi.org/10.3176/proc.2022.4.07","url":null,"abstract":"The signals in nerve include electrical, mechanical and thermal components and are characterized by the complexity of processes. The modelling of these signals is analyzed from the viewpoint of DeLanda who has demonstrated the possibility to expose the philosophical theories of Deleuze by using the notions from nonlinear dynamics. It is demonstrated that the mathematical modelling of processes in nerves by authors of this paper follows the general ideas of multiplicity and causal interactions described by DeLanda.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Chlorophyll spectroscopy: conceptual basis, modern high-resolution approaches, and current challenges","authors":"A. Freiberg, J. Linnanto, M. Rätsep, J. Reimers","doi":"10.3176/proc.2022.2.04","DOIUrl":"https://doi.org/10.3176/proc.2022.2.04","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"2616 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69932981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Free vibrations of stepped nano-beams with cracks","authors":"J. Lellep, A. Lenbaum","doi":"10.3176/proc.2022.1.09","DOIUrl":"https://doi.org/10.3176/proc.2022.1.09","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The effectiveness of optical methods such as photodynamic therapy (PDT) depends on the amount of light distribution within the tissue to aid their potential for early cancer detection in a quantitative and non-invasive manner. Knowledge of the effective attenuation coefficient and penetration depth for the laser light is crucial to ensuring that the tumour tissue receives adequate optical energy. This study investigated the effective attenuation coefficient and penetration depth of He–Ne 630 nm red laser light in polyvinyl alcohol slime glue phantoms simulating human brain tumour tissues. The effective attenuation coefficient (μeff) and penetration depth (δ) were deduced from the absorption coefficient (μa), scattering coefficient (μs), and anisotropy factor (g) obtained from the Henyey–Greenstein (H–G) function by collimated laser beam measurements. We found that the effective attenuation coefficient and penetration depth were 0.25 ± 0.02 mm−1 and 4.00 mm, respectively, in the simulated phantoms. These values were in reasonable agreement with values reported for malignant human brain tumour tissues in the literature. The constructed phantoms would be an excellent tool for the continued evaluation of PDT as an essential therapeutic procedure in cancer management.
{"title":"Effective attenuation coefficient and penetration depth of 630 nm laser light in polyvinyl alcohol slime glue phantoms simulating the human brain tumour","authors":"B. Adeleye, N. Chetty, L. Ntombela","doi":"10.3176/proc.2022.3.03","DOIUrl":"https://doi.org/10.3176/proc.2022.3.03","url":null,"abstract":"The effectiveness of optical methods such as photodynamic therapy (PDT) depends on the amount of light distribution within the tissue to aid their potential for early cancer detection in a quantitative and non-invasive manner. Knowledge of the effective attenuation coefficient and penetration depth for the laser light is crucial to ensuring that the tumour tissue receives adequate optical energy. This study investigated the effective attenuation coefficient and penetration depth of He–Ne 630 nm red laser light in polyvinyl alcohol slime glue phantoms simulating human brain tumour tissues. The effective attenuation coefficient (μeff) and penetration depth (δ) were deduced from the absorption coefficient (μa), scattering coefficient (μs), and anisotropy factor (g) obtained from the Henyey–Greenstein (H–G) function by collimated laser beam measurements. We found that the effective attenuation coefficient and penetration depth were 0.25 ± 0.02 mm−1 and 4.00 mm, respectively, in the simulated phantoms. These values were in reasonable agreement with values reported for malignant human brain tumour tissues in the literature. The constructed phantoms would be an excellent tool for the continued evaluation of PDT as an essential therapeutic procedure in cancer management.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the numerical solution of some differential equations with nonlocal integral boundary conditions via Haar wavelet","authors":"I. Aziz, M. Nisar, S. Ul-Islam","doi":"10.3176/proc.2022.1.03","DOIUrl":"https://doi.org/10.3176/proc.2022.1.03","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69932834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Grimonia, N. Hamidah, T. M. Herninda, I. Khan, L. Merinda, G. Nugroho, G. K. Putri, R. H. Setyobudi, L. A. Shah, E. Yandri, I. Zekker
{"title":"Analysis of thermal management in prismatic and cylindrical lithium-ion batteries with mass flow rate and geometry of cooling plate channel variation for cooling system based on computational fluid dynamics","authors":"E. Grimonia, N. Hamidah, T. M. Herninda, I. Khan, L. Merinda, G. Nugroho, G. K. Putri, R. H. Setyobudi, L. A. Shah, E. Yandri, I. Zekker","doi":"10.3176/proc.2022.3.01","DOIUrl":"https://doi.org/10.3176/proc.2022.3.01","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Kaldmäe, V. Kaparin, Ü. Kotta, T. Mullari, E. Pawluszewiczc
. The paper investigates some properties of recently defined forward and backward shifts of vector fields. The main purpose of the paper is to show that the forward and backward shifts of vector fields commute with the Lie bracket operator and with some commonly used system transformations. The latter include, for example, classical and parametrized state transformations as well as static and dynamic state feedbacks. These properties become important when studying control problems involving such transformations.
{"title":"On the properties of forward and backward shifts of vector fields","authors":"A. Kaldmäe, V. Kaparin, Ü. Kotta, T. Mullari, E. Pawluszewiczc","doi":"10.3176/proc.2022.4.02","DOIUrl":"https://doi.org/10.3176/proc.2022.4.02","url":null,"abstract":". The paper investigates some properties of recently defined forward and backward shifts of vector fields. The main purpose of the paper is to show that the forward and backward shifts of vector fields commute with the Lie bracket operator and with some commonly used system transformations. The latter include, for example, classical and parametrized state transformations as well as static and dynamic state feedbacks. These properties become important when studying control problems involving such transformations.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69933928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Quantification of cracks in beams on the Pasternak foundation using Haar wavelets and machine learning","authors":"H. Hein, L. Jaanuska","doi":"10.3176/proc.2022.1.02","DOIUrl":"https://doi.org/10.3176/proc.2022.1.02","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69932693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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