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Article: An Evaluation of 3D-Printed Materials' Structural Properties Using Active Infrared Thermography and Deep Neural Networks Trained on the Numerical Data.

Szymanik, Barbara

2022 Volume 15, Issue 10

Abstract: This article describes an approach to evaluating the structural properties of samples manufactured through 3D printing via active infrared thermography. The mentioned technique was used to test the PETG sample, using halogen lamps as an excitation source. ...

Abstract	This article describes an approach to evaluating the structural properties of samples manufactured through 3D printing via active infrared thermography. The mentioned technique was used to test the PETG sample, using halogen lamps as an excitation source. First, a simplified, general numerical model of the phenomenon was prepared; then, the obtained data were used in a process of the deep neural network training. Finally, the network trained in this manner was used for the material evaluation on the basis of the original experimental data. The described methodology allows for the automated assessment of the structural state of 3D-printed materials. The usage of a generalized model is an innovative method that allows for greater product assessment flexibility.
Language	English
Publishing date	2022-05-23
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma15103727
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Article ; Online: Structural Health Monitoring

Grzegorz Psuj / Barbara Szymanik

Applied Sciences, Vol 13, Iss 7617, p

Latest Applications and Data Analysis

2023 Volume 7617

Abstract: Structural health monitoring (SHM) is focused on the systematic monitoring of the state of structures to determine their safety, dependability, and durability [.] ...

Abstract	Structural health monitoring (SHM) is focused on the systematic monitoring of the state of structures to determine their safety, dependability, and durability [.]
Keywords	n/a ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Detection and Identification of Defects in 3D-Printed Dielectric Structures via Thermographic Inspection and Deep Neural Networks.

Szymanik, Barbara / Psuj, Grzegorz / Hashemi, Maryam / Lopato, Przemyslaw

Materials (Basel, Switzerland)

2021 Volume 14, Issue 15

Abstract: In this paper, we propose a new method based on active infrared thermography (IRT) applied to assess the state of 3D-printed structures. The technique utilized here-active IRT-assumes the use of an external energy source to heat the tested material and ... ...

Abstract	In this paper, we propose a new method based on active infrared thermography (IRT) applied to assess the state of 3D-printed structures. The technique utilized here-active IRT-assumes the use of an external energy source to heat the tested material and to create a temperature difference between undamaged and defective areas, and this temperature difference is possible to observe with a thermal imaging camera. In the case of materials with a low value of thermal conductivity, such as the acrylonitrile butadiene styrene (ABS) plastic printout tested in the presented work, the obtained temperature differences are hardly measurable. Hence, the proposed novel IRT method is complemented by a dedicated algorithm for signal analysis and a multi-label classifier based on a deep convolutional neural network (DCNN). For the initial testing of the presented methodology, a 3D printout made in the shape of a cuboid was prepared. One type of defect was tested-surface breaking holes of various depths and diameters that were produced artificially by inclusion in the printout. As a result of examining the sample via the IRT method, a sequence of thermograms was obtained, which enabled the examination of the temporal representation of temperature variation over the examined region of the material. First, the obtained signals were analysed using a new algorithm to enhance the contrast between the background and the defect areas in the 3D print. In the second step, the DCNN was utilised to identify the chosen defect parameters. The experimental results show the high effectiveness of the proposed hybrid signal analysis method to visualise the inner structure of the sample and to determine the defect and size, including the depth and diameter.
Language	English
Publishing date	2021-07-27
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma14154168
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Article ; Online: Detection and Inspection of Steel Bars in Reinforced Concrete Structures Using Active Infrared Thermography with Microwave Excitation and Eddy Current Sensors.

Szymanik, Barbara / Frankowski, Paweł Karol / Chady, Tomasz / John Chelliah, Cyril Robinson Azariah

Sensors (Basel, Switzerland)

2016 Volume 16, Issue 2, Page(s) 234

Abstract: The purpose of this paper is to present a multi-sensor approach to the detection and inspection of steel bars in reinforced concrete structures. In connection with our past experience related to non-destructive testing of different materials, we propose ... ...

Abstract	The purpose of this paper is to present a multi-sensor approach to the detection and inspection of steel bars in reinforced concrete structures. In connection with our past experience related to non-destructive testing of different materials, we propose using two potentially effective methods: active infrared thermography with microwave excitation and the eddy current technique. In this article active infrared thermography with microwave excitation is analyzed both by numerical modeling and experiments. This method, based on thermal imaging, due to its characteriatics should be considered as a preliminary method for the assessment of relatively shallowly located steel bar reinforcements. The eddy current technique, on the other hand, allows for more detailed evaluation and detection of deeply located rebars. In this paper a series of measurement results, together with the initial identification of certain features of steel reinforcement bars will be presented.
Language	English
Publishing date	2016-02-16
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s16020234
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Article ; Online: Detection and Inspection of Steel Bars in Reinforced Concrete Structures Using Active Infrared Thermography with Microwave Excitation and Eddy Current Sensors

Barbara Szymanik / Paweł Karol Frankowski / Tomasz Chady / Cyril Robinson Azariah John Chelliah

Sensors, Vol 16, Iss 2, p

2016 Volume 234

Abstract	The purpose of this paper is to present a multi-sensor approach to the detection and inspection of steel bars in reinforced concrete structures. In connection with our past experience related to non-destructive testing of different materials, we propose using two potentially effective methods: active infrared thermography with microwave excitation and the eddy current technique. In this article active infrared thermography with microwave excitation is analyzed both by numerical modeling and experiments. This method, based on thermal imaging, due to its characteriatics should be considered as a preliminary method for the assessment of relatively shallowly located steel bar reinforcements. The eddy current technique, on the other hand, allows for more detailed evaluation and detection of deeply located rebars. In this paper a series of measurement results, together with the initial identification of certain features of steel reinforcement bars will be presented.
Keywords	infrared thermography ; microwave heating ; eddy current testing ; multi frequency eddy current technique ; concrete testing ; rebar detection ; Technology (General) ; T1-995 ; Technology ; T ; Analytical chemistry ; QD71-142 ; Chemistry ; QD1-999 ; Science ; Q
Subject code	620
Language	English
Publishing date	2016-02-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Minimal hepatic encephalopathy does not impair health-related quality of life in patients with cirrhosis: a prospective study.

Wunsch, Ewa / Szymanik, Barbara / Post, Michał / Marlicz, Wojciech / Mydłowska, Marta / Milkiewicz, Piotr

Liver international : official journal of the International Association for the Study of the Liver

2011 Volume 31, Issue 7, Page(s) 980–984

Abstract: Background: Minimal hepatic encephalopathy (HE) is a serious complication of cirrhosis; however, the impact of minimal HE on health-related quality of life (HRQoL) remains controversial. The Psychometric Hepatic Encephalopathy Score (PHES) remains a ' ... ...

Abstract	Background: Minimal hepatic encephalopathy (HE) is a serious complication of cirrhosis; however, the impact of minimal HE on health-related quality of life (HRQoL) remains controversial. The Psychometric Hepatic Encephalopathy Score (PHES) remains a 'gold standard' for the assessment of minimal HE, but its results clearly differ between studied populations. Aim: We studied the effect of minimal HE on patient HRQoL. Methods: Eighty-seven consecutive cirrhotic patients were included. All patients underwent clinical and psychometric evaluation at the same day. Ten subjects with overt HE confirmed with West Haven criteria were excluded from the study, thus 77 patients were finally analysed. Patients with minimal HE were identified on the grounds of altered PHES. HRQoL was assessed by the Medical Outcomes Study 36-Item Short Form Health Survey (SF-36) and the Chronic Liver Disease Questionnaire (CLDQ). Normative reference data for PHES were established from a cohort of 305 healthy Polish subjects. Results: Twenty-nine (37.7%) patients were diagnosed with minimal HE. When patients with and without minimal HE were compared, HRQoL was not significantly different in none of the SF-36 and CLDQ domains. Conclusion: Minimal HE does not affect HRQoL.
MeSH term(s)	Adult ; Aged ; Aged, 80 and over ; Female ; Hepatic Encephalopathy/etiology ; Hepatic Encephalopathy/pathology ; Hepatic Encephalopathy/psychology ; Humans ; Linear Models ; Liver Cirrhosis/complications ; Male ; Middle Aged ; Poland ; Prospective Studies ; Psychometrics/methods ; Quality of Life/psychology ; Surveys and Questionnaires
Language	English
Publishing date	2011-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	2102783-3
ISSN	1478-3231 ; 1478-3223
ISSN (online)	1478-3231
ISSN	1478-3223
DOI	10.1111/j.1478-3231.2011.02465.x
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Article ; Online: Critical flicker frequency fails to disclose brain dysfunction in patients with primary biliary cirrhosis.

Wunsch, Ewa / Post, Michał / Gutkowski, Krzysztof / Marlicz, Wojciech / Szymanik, Barbara / Hartleb, Marek / Milkiewicz, Piotr

Digestive and liver disease : official journal of the Italian Society of Gastroenterology and the Italian Association for the Study of the Liver

2010 Volume 42, Issue 11, Page(s) 818–821

Abstract: Background: Recent studies suggest that stage-independent symptoms of primary biliary cirrhosis (PBC) such as chronic fatigue are a consequence of structural and functional abnormalities of the brain. Critical flicker frequency (CFF) is a ... ...

Abstract	Background: Recent studies suggest that stage-independent symptoms of primary biliary cirrhosis (PBC) such as chronic fatigue are a consequence of structural and functional abnormalities of the brain. Critical flicker frequency (CFF) is a psychophysiological modality analysing function of cerebral cortex. Aim: To analyse the usefulness of CFF in detection of brain dysfunction in patients with PBC. Methods: Fifty-one (37 non-cirrhotic/14 cirrhotic) patients with PBC were included. Control group consisted of 31 matched healthy individuals. Fatigue and health-related quality of life (HRQoL) were assessed using Fatigue Impact Scale (FIS) and questionnaire PBC-40. CFF was analysed with HEPAtonorm Analyzer(®). Results: When compared to healthy controls all patients with PBC showed significantly impaired HRQoL in majority of PBC-40 domains and increased fatigue level in physical domain of FIS. No differences in HRQoL and PBC-40 domains were seen, when patients with and without cirrhosis where compared. CFF analysis showed no difference between healthy controls and patients with PBC. CFF did not correlate with PBC-40 and FIS domains. Conclusion: CFF fails to determine brain dysfunction in non-encephalopatic patients with PBC, suggesting that functional efficiency of their cerebral cortex remains unaffected and other central mechanisms are responsible for chronic fatigue in these patients.
MeSH term(s)	Adult ; Aged ; Cerebral Cortex/pathology ; Chronic Disease ; Fatigue/diagnosis ; Fatigue/etiology ; Fatigue/physiopathology ; Fatigue/psychology ; Female ; Humans ; Liver Cirrhosis, Biliary/complications ; Liver Cirrhosis, Biliary/physiopathology ; Male ; Middle Aged ; Neuropsychological Tests ; Psychophysiology ; Quality of Life ; Severity of Illness Index ; Sickness Impact Profile ; Surveys and Questionnaires
Language	English
Publishing date	2010-11
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1459373-7
ISSN	1878-3562 ; 1125-8055
ISSN (online)	1878-3562
ISSN	1125-8055
DOI	10.1016/j.dld.2010.03.017
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Article ; Online: Validation of the BARD scoring system in Polish patients with nonalcoholic fatty liver disease (NAFLD).

Raszeja-Wyszomirska, Joanna / Szymanik, Barbara / Ławniczak, Małgorzata / Kajor, Maciej / Chwist, Alina / Milkiewicz, Piotr / Hartleb, Marek

BMC gastroenterology

2010 Volume 10, Page(s) 67

Abstract: Background: Nonalcoholic fatty liver disease (NAFLD) includes a wide spectrum of liver diseases, ranging from pure steatosis to nonalcoholic steatohepatitis (NASH), and eventually to liver cirrhosis with its complications. Identifying advanced fibrosis ... ...

Abstract	Background: Nonalcoholic fatty liver disease (NAFLD) includes a wide spectrum of liver diseases, ranging from pure steatosis to nonalcoholic steatohepatitis (NASH), and eventually to liver cirrhosis with its complications. Identifying advanced fibrosis in patients is crucial to evaluating prognosis and possible therapeutic intervention. A novel, simple, and highly accurate scoring system called BARD, which identifies patients with NAFLD and without significant fibrosis, has been recently introduced and validated in North America..The aim of this study is to validate the BARD scoring system in a Polish cohort with NAFLD. Methods: A group of 104 Caucasians with biopsy-proven NAFLD were included in this study. Fibrosis in liver biopsies was evaluated according to the Histological Scoring System for Nonalcoholic Fatty Liver Disease. The BARD scoring system was assessed according to Harrison et al.: BMI > or = 28 = 1 point, AST/ALT ratio (AAR) > or = 0.8 = 2 points, type 2 diabetes mellitus = 1 point. Results: Age over 50 and AAR over 0.8 showed, respectively, a moderate and strong association with advanced fibrosis. A BARD score of 2-4 points was associated with F3 or F4 stages of fibrosis with an odds ratio of 17.333 (95% Cl; 3,639 - 82.558) and negative predictive value of 97%. Conclusion: Our results demonstrate that the BARD scoring system has value in the non-invasive diagnosis of advanced fibrosis in NAFLD patients. The vast majority of patients with NAFLD would avoid liver biopsy if BARD was broadly introduced into the clinic.
MeSH term(s)	Adult ; Aged ; Alanine Transaminase/blood ; Aspartate Aminotransferases/blood ; Biopsy ; Blood Glucose/metabolism ; Body Mass Index ; Cohort Studies ; Diabetes Mellitus, Type 2/blood ; Diabetes Mellitus, Type 2/diagnosis ; Fatty Liver/blood ; Fatty Liver/diagnosis ; Fatty Liver/pathology ; Female ; Humans ; Liver/pathology ; Liver Cirrhosis/blood ; Liver Cirrhosis/diagnosis ; Liver Cirrhosis/pathology ; Male ; Middle Aged ; Poland ; Predictive Value of Tests ; Retrospective Studies ; Severity of Illness Index
Chemical Substances	Blood Glucose ; Aspartate Aminotransferases (EC 2.6.1.1) ; Alanine Transaminase (EC 2.6.1.2)
Language	English
Publishing date	2010-06-28
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Validation Study
ISSN	1471-230X
ISSN (online)	1471-230X
DOI	10.1186/1471-230X-10-67
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Article ; Online: Validation of the BARD scoring system in Polish patients with nonalcoholic fatty liver disease (NAFLD)

Chwist Alina / Kajor Maciej / Ławniczak Małgorzata / Szymanik Barbara / Raszeja-Wyszomirska Joanna / Milkiewicz Piotr / Hartleb Marek

BMC Gastroenterology, Vol 10, Iss 1, p

2010 Volume 67

Abstract: Abtract Background Nonalcoholic fatty liver disease (NAFLD) includes a wide spectrum of liver diseases, ranging from pure steatosis to nonalcoholic steatohepatitis (NASH), and eventually to liver cirrhosis with its complications. Identifying advanced ... ...

Abstract	Abtract Background Nonalcoholic fatty liver disease (NAFLD) includes a wide spectrum of liver diseases, ranging from pure steatosis to nonalcoholic steatohepatitis (NASH), and eventually to liver cirrhosis with its complications. Identifying advanced fibrosis in patients is crucial to evaluating prognosis and possible therapeutic intervention. A novel, simple, and highly accurate scoring system called BARD, which identifies patients with NAFLD and without significant fibrosis, has been recently introduced and validated in North America.The aim of this study is to validate the BARD scoring system in a Polish cohort with NAFLD. Methods A group of 104 Caucasians with biopsy-proven NAFLD were included in this study. Fibrosis in liver biopsies was evaluated according to the Histological Scoring System for Nonalcoholic Fatty Liver Disease. The BARD scoring system was assessed according to Harrison et al.: BMI ≥ 28 = 1 point, AST/ALT ratio (AAR) ≥ 0.8 = 2 points, type 2 diabetes mellitus = 1point. Results Age over 50 and AAR over 0.8 showed, respectively, a moderate and strong association with advanced fibrosis. A BARD score of 2-4 points was associated with F3 or F4 stages of fibrosis with an odds ratio of 17.333 (95% Cl; 3,639 - 82.558) and negative predictive value of 97%. Conclusion Our results demonstrate that the BARD scoring system has value in the non-invasive diagnosis of advanced fibrosis in NAFLD patients. The vast majority of patients with NAFLD would avoid liver biopsy if BARD was broadly introduced into the clinic.
Keywords	Diseases of the digestive system. Gastroenterology ; RC799-869 ; Specialties of internal medicine ; RC581-951 ; Internal medicine ; RC31-1245 ; Medicine ; R ; DOAJ:Gastroenterology ; DOAJ:Medicine (General) ; DOAJ:Health Sciences
Subject code	610
Language	English
Publishing date	2010-06-01T00:00:00Z
Publisher	BioMed Central
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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