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Konecny J, Beremlijski P, Bailova M, Machacek Z, Koziorek J, Prauzek M. Industrial camera model positioned on an effector for automated tool center point calibration. Sci Rep 2024; 14:323. [PMID: 38172245 PMCID: PMC10764955 DOI: 10.1038/s41598-023-51011-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 12/29/2023] [Indexed: 01/05/2024] Open
Abstract
The study presents a novel, full model of an industrial camera suitable for robotic manipulator tool center point (TCP) calibration. The authors propose a new solution which employs a full camera model positioned on the effector of an industrial robotic arm. The proposed full camera model simulates the capture of a calibration pattern for use in automated TCP calibration. The study describes an experimental test robot stand for producing a reference data set, a full camera model, the parameters of a generally known camera obscura model, and a comparison of proposed solution with the camera obscura model. The results are discussed in the context of an innovative approach which features a full camera model to assist the TCP calibration process. The results showed that the full camera model produced greater accuracy, a significant benefit not provided by other state-of-the-art methods. In several cases, the absolute error produced was up to seven times lower than with the state-of-the-art camera obscura model. The error for small rotation (max. of 5[Formula: see text]) and small translation (max. of 20 mm) was 3.65 pixels. The results also highlighted the applicability of the proposed solution in real-life industrial processes.
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Affiliation(s)
- Jaromir Konecny
- VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 708 00, Czech Republic.
| | - Petr Beremlijski
- VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 708 00, Czech Republic
| | - Michaela Bailova
- VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 708 00, Czech Republic
| | - Zdenek Machacek
- VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 708 00, Czech Republic
| | - Jiri Koziorek
- VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 708 00, Czech Republic
| | - Michal Prauzek
- VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 708 00, Czech Republic
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Prauzek M, Kucova T, Konecny J, Adamikova M, Gaiova K, Mikus M, Pospisil P, Andriukaitis D, Zilys M, Martinkauppi B, Koziorek J. IoT Sensor Challenges for Geothermal Energy Installations Monitoring: A Survey. Sensors (Basel) 2023; 23:5577. [PMID: 37420742 DOI: 10.3390/s23125577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/25/2023] [Accepted: 06/07/2023] [Indexed: 07/09/2023]
Abstract
Geothermal energy installations are becoming increasingly common in new city developments and renovations. With a broad range of technological applications and improvements in this field, the demand for suitable monitoring technologies and control processes for geothermal energy installations is also growing. This article identifies opportunities for the future development and deployment of IoT sensors applied to geothermal energy installations. The first part of the survey describes the technologies and applications of various sensor types. Sensors that monitor temperature, flow rate and other mechanical parameters are presented with a technological background and their potential applications. The second part of the article surveys Internet-of-Things (IoT), communication technology and cloud solutions applicable to geothermal energy monitoring, with a focus on IoT node designs, data transmission technologies and cloud services. Energy harvesting technologies and edge computing methods are also reviewed. The survey concludes with a discussion of research challenges and an outline of new areas of application for monitoring geothermal installations and innovating technologies to produce IoT sensor solutions.
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Affiliation(s)
- Michal Prauzek
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Tereza Kucova
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Jaromir Konecny
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Monika Adamikova
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Karolina Gaiova
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Miroslav Mikus
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Pavel Pospisil
- Department of Geotechnics and Underground Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
| | - Darius Andriukaitis
- Department of Electronics Engineering, Kaunas University of Technology, 44249 Kaunas, Lithuania
| | - Mindaugas Zilys
- Department of Electronics Engineering, Kaunas University of Technology, 44249 Kaunas, Lithuania
| | | | - Jiri Koziorek
- Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 708 00 Ostrava, Czech Republic
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Novak M, Svobodova B, Konecny J, Kuratkova A, Nevosadova L, Prchal L, Korabecny J, Lauschke VM, Soukup O, Kučera R. UHPLC-Orbitrap study of the first phase tacrine in vitro metabolites and related Alzheimer's drug candidates using human liver microsomes. J Pharm Biomed Anal 2023; 224:115154. [PMID: 36442458 DOI: 10.1016/j.jpba.2022.115154] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/16/2022] [Accepted: 11/08/2022] [Indexed: 11/13/2022]
Abstract
Tacrine was the first drug used in the therapy of Alzheimer's disease (AD) and is one of the leading structures frequently pursued in the drug discovery of novel candidates for tackling AD. However, because tacrine has been withdrawn from the market due to its hepatotoxicity, ascribed to specific metabolites, concerns are high about the toxicity profile of newly developed compounds related to tacrine. From the point of view of drug safety, the formation of metabolites must be uncovered and analyzed. Bearing in mind that the main culprit of tacrine hepatotoxicity is its biotransformation to hydroxylated metabolites, human liver microsomes were used as a biotransformation model. Our study aims to clarify phase I metabolites of three potentially non-toxic tacrine derivatives (7-methoxytacrine, 6-chlorotacrine, 7-phenoxytacrine) and to semi-quantitatively determine the relative amount of individual metabolites as potential culprits of tacrine-based hepatotoxicity. For this purpose, a new selective UHPLC-Orbitrap method has been developed. Applying UHPLC-Orbitrap method, two as yet unpublished tacrine and 7-methoxytacrine monohydroxylated metabolites have been found and completely characterized, and the separation of ten dihydroxylated tacrine and 7-methoxytacrine metabolites was achieved for the first time. Moreover, the structures of several new metabolites of 7-phenoxytacrine and 6-chlorotacrine have been identified. In addition, the relative amount of these newly observed metabolites was determined. Based on the results and known facts about the toxicity of tacrine metabolites published so far, it appears that 7-phenoxytacrine and 6-chlorotacrine could be substantially less hepatotoxic compared to tacrine, and could potentially pave the way for metabolically safe molecules applicable in AD therapy.
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Affiliation(s)
- M Novak
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic; Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic.
| | - B Svobodova
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic; Department of Toxicology and Military Pharmacy, Trebesska 1575, 50005 Hradec Kralove, Czech Republic.
| | - J Konecny
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic; Department of Toxicology and Military Pharmacy, Trebesska 1575, 50005 Hradec Kralove, Czech Republic.
| | - A Kuratkova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic.
| | - L Nevosadova
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic.
| | - L Prchal
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic.
| | - J Korabecny
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic; Department of Toxicology and Military Pharmacy, Trebesska 1575, 50005 Hradec Kralove, Czech Republic.
| | - V M Lauschke
- Department of Physiology and Pharmacology, Karolinska Institutet, 17177 Stockholm, Sweden; Dr Margarete Fischer-Bosch Institute of Clinical Pharmacology, 70376 Stuttgart, Germany; University of Tübingen, 72074 Tübingen, Germany.
| | - O Soukup
- Biomedical Research Centre, University Hospital Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic.
| | - R Kučera
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Heyrovskeho 1203, 50005 Hradec Kralove, Czech Republic.
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Paterova T, Prauzek M, Konecny J, Ozana S, Zmij P, Stankus M, Weise D, Pierer A. Environment-Monitoring IoT Devices Powered by a TEG Which Converts Thermal Flux between Air and Near-Surface Soil into Electrical Energy. Sensors (Basel) 2021; 21:s21238098. [PMID: 34884107 PMCID: PMC8662441 DOI: 10.3390/s21238098] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/26/2021] [Accepted: 12/01/2021] [Indexed: 11/17/2022]
Abstract
Energy harvesting has an essential role in the development of reliable devices for environmental wireless sensor networks (EWSN) in the Internet of Things (IoT), without considering the need to replace discharged batteries. Thermoelectric energy is a renewable energy source that can be exploited in order to efficiently charge a battery. The paper presents a simulation of an environment monitoring device powered by a thermoelectric generator (TEG) that harvests energy from the temperature difference between air and soil. The simulation represents a mathematical description of an EWSN, which consists of a sensor model powered by a DC/DC boost converter via a TEG and a load, which simulates data transmission, a control algorithm and data collection. The results section provides a detailed description of the harvested energy parameters and properties and their possibilities for use. The harvested energy allows supplying the load with an average power of 129.04 μW and maximum power of 752.27 μW. The first part of the results section examines the process of temperature differences and the daily amount of harvested energy. The second part of the results section provides a comprehensive analysis of various settings for the EWSN device’s operational period and sleep consumption. The study investigates the device’s number of operational cycles, quantity of energy used, discharge time, failures and overheads.
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Affiliation(s)
- Tereza Paterova
- Department of Cybernetics and Biomedical Engineering, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic; (T.P.); (J.K.); (S.O.); (M.S.)
| | - Michal Prauzek
- Department of Cybernetics and Biomedical Engineering, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic; (T.P.); (J.K.); (S.O.); (M.S.)
- Correspondence: ; Tel.: +420-59-732-5857
| | - Jaromir Konecny
- Department of Cybernetics and Biomedical Engineering, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic; (T.P.); (J.K.); (S.O.); (M.S.)
| | - Stepan Ozana
- Department of Cybernetics and Biomedical Engineering, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic; (T.P.); (J.K.); (S.O.); (M.S.)
| | - Petr Zmij
- Brose CZ Spol. s r.o., 742 21 Koprivnice, Czech Republic;
| | - Martin Stankus
- Department of Cybernetics and Biomedical Engineering, VSB—Technical University of Ostrava, 708 00 Ostrava, Czech Republic; (T.P.); (J.K.); (S.O.); (M.S.)
| | - Dieter Weise
- Fraunhofer Institute for Machine Tools and Forming Technology IWU, 09126 Chemnitz, Germany; (D.W.); (A.P.)
| | - Alexander Pierer
- Fraunhofer Institute for Machine Tools and Forming Technology IWU, 09126 Chemnitz, Germany; (D.W.); (A.P.)
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Prauzek M, Konecny J, Borova M, Janosova K, Hlavica J, Musilek P. Energy Harvesting Sources, Storage Devices and System Topologies for Environmental Wireless Sensor Networks: A Review. Sensors (Basel) 2018; 18:s18082446. [PMID: 30060513 PMCID: PMC6111894 DOI: 10.3390/s18082446] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/20/2018] [Accepted: 07/23/2018] [Indexed: 01/18/2023]
Abstract
The operational efficiency of remote environmental wireless sensor networks (EWSNs) has improved tremendously with the advent of Internet of Things (IoT) technologies over the past few years. EWSNs require elaborate device composition and advanced control to attain long-term operation with minimal maintenance. This article is focused on power supplies that provide energy to run the wireless sensor nodes in environmental applications. In this context, EWSNs have two distinct features that set them apart from monitoring systems in other application domains. They are often deployed in remote areas, preventing the use of mains power and precluding regular visits to exchange batteries. At the same time, their surroundings usually provide opportunities to harvest ambient energy and use it to (partially) power the sensor nodes. This review provides a comprehensive account of energy harvesting sources, energy storage devices, and corresponding topologies of energy harvesting systems, focusing on studies published within the last 10 years. Current trends and future directions in these areas are also covered.
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Affiliation(s)
- Michal Prauzek
- Faculty of Computer Science, VSB Technical University of Ostrava, 708 33 Ostrava, Czech Republic.
| | - Jaromir Konecny
- Faculty of Computer Science, VSB Technical University of Ostrava, 708 33 Ostrava, Czech Republic.
| | - Monika Borova
- Faculty of Computer Science, VSB Technical University of Ostrava, 708 33 Ostrava, Czech Republic.
| | - Karolina Janosova
- Faculty of Computer Science, VSB Technical University of Ostrava, 708 33 Ostrava, Czech Republic.
| | - Jakub Hlavica
- Faculty of Computer Science, VSB Technical University of Ostrava, 708 33 Ostrava, Czech Republic.
| | - Petr Musilek
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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Martinek R, Kahankova R, Nazeran H, Konecny J, Jezewski J, Janku P, Bilik P, Zidek J, Nedoma J, Fajkus M. Non-Invasive Fetal Monitoring: A Maternal Surface ECG Electrode Placement-Based Novel Approach for Optimization of Adaptive Filter Control Parameters Using the LMS and RLS Algorithms. Sensors (Basel) 2017; 17:s17051154. [PMID: 28534810 PMCID: PMC5470900 DOI: 10.3390/s17051154] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/05/2017] [Accepted: 05/12/2017] [Indexed: 11/16/2022]
Abstract
This paper is focused on the design, implementation and verification of a novel method for the optimization of the control parameters (such as step size μ and filter order N) of LMS and RLS adaptive filters used for noninvasive fetal monitoring. The optimization algorithm is driven by considering the ECG electrode positions on the maternal body surface in improving the performance of these adaptive filters. The main criterion for optimal parameter selection was the Signal-to-Noise Ratio (SNR). We conducted experiments using signals supplied by the latest version of our LabVIEW-Based Multi-Channel Non-Invasive Abdominal Maternal-Fetal Electrocardiogram Signal Generator, which provides the flexibility and capability of modeling the principal distribution of maternal/fetal ECGs in the human body. Our novel algorithm enabled us to find the optimal settings of the adaptive filters based on maternal surface ECG electrode placements. The experimental results further confirmed the theoretical assumption that the optimal settings of these adaptive filters are dependent on the ECG electrode positions on the maternal body, and therefore, we were able to achieve far better results than without the use of optimization. These improvements in turn could lead to a more accurate detection of fetal hypoxia. Consequently, our approach could offer the potential to be used in clinical practice to establish recommendations for standard electrode placement and find the optimal adaptive filter settings for extracting high quality fetal ECG signals for further processing. Ultimately, diagnostic-grade fetal ECG signals would ensure the reliable detection of fetal hypoxia.
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Affiliation(s)
- Radek Martinek
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
| | - Radana Kahankova
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
| | - Homer Nazeran
- Department of Electrical and Computer Engineering, University of Texas El Paso, 500 W University Ave, El Paso, TX 79968, USA.
| | - Jaromir Konecny
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
| | - Janusz Jezewski
- Institute of Medical Technology and Equipment ITAM, 118 Roosevelt Str., 41-800 Zabrze, Poland.
| | - Petr Janku
- Department of Obstetrics and Gynecology, Masaryk University and University Hospital Brno, Jihlavska 20, 625 00 Brno, Czech Republic.
| | - Petr Bilik
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
| | - Jan Zidek
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
| | - Jan Nedoma
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
| | - Marcel Fajkus
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, 70833 Ostrava, Czech Republic.
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Martinek R, Nedoma J, Fajkus M, Kahankova R, Konecny J, Janku P, Kepak S, Bilik P, Nazeran H. A Phonocardiographic-Based Fiber-Optic Sensor and Adaptive Filtering System for Noninvasive Continuous Fetal Heart Rate Monitoring. Sensors (Basel) 2017; 17:s17040890. [PMID: 28420215 PMCID: PMC5426540 DOI: 10.3390/s17040890] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 03/28/2017] [Accepted: 04/12/2017] [Indexed: 11/21/2022]
Abstract
This paper focuses on the design, realization, and verification of a novel phonocardiographic- based fiber-optic sensor and adaptive signal processing system for noninvasive continuous fetal heart rate (fHR) monitoring. Our proposed system utilizes two Mach-Zehnder interferometeric sensors. Based on the analysis of real measurement data, we developed a simplified dynamic model for the generation and distribution of heart sounds throughout the human body. Building on this signal model, we then designed, implemented, and verified our adaptive signal processing system by implementing two stochastic gradient-based algorithms: the Least Mean Square Algorithm (LMS), and the Normalized Least Mean Square (NLMS) Algorithm. With this system we were able to extract the fHR information from high quality fetal phonocardiograms (fPCGs), filtered from abdominal maternal phonocardiograms (mPCGs) by performing fPCG signal peak detection. Common signal processing methods such as linear filtering, signal subtraction, and others could not be used for this purpose as fPCG and mPCG signals share overlapping frequency spectra. The performance of the adaptive system was evaluated by using both qualitative (gynecological studies) and quantitative measures such as: Signal-to-Noise Ratio—SNR, Root Mean Square Error—RMSE, Sensitivity—S+, and Positive Predictive Value—PPV.
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Affiliation(s)
- Radek Martinek
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Jan Nedoma
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Marcel Fajkus
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Radana Kahankova
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Jaromir Konecny
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Petr Janku
- Department of Obstetrics and Gynecology, Masaryk University and University Hospital Brno, Jihlavska 20, 625 00 Brno, Czech Republic.
| | - Stanislav Kepak
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Petr Bilik
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Homer Nazeran
- Department of Electrical and Computer Engineering, University of Texas El Paso, 500 W University Ave, El Paso, TX 79968, USA.
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Konecny J, Klvacek A, Simek M, Lonsky V, Santavy P. Complex gunshot injury to the heart as a consequence of suicide attempt in a schizophrenic patient. Int J Surg Case Rep 2016; 24:80-2. [PMID: 27232290 PMCID: PMC4885112 DOI: 10.1016/j.ijscr.2016.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/09/2016] [Accepted: 05/09/2016] [Indexed: 11/11/2022] Open
Abstract
Self- inflicted gunshot injury to the heart is uncommon in Western Europe. Up to 40% of schizophrenic patients have history of suicide attempt. Discontinuation of antipsychotic medications is one of the major risk factor for suicide among individuals with schizophrenia. Midline sternotomy provides superior access to the heart and large vessels, pulmonary hilum as well as for access for extracorporeal circulation.
Introduction Self-inflicted gunshot injury to the heart is uncommon in Western Europe countries. However it is considered to have a high mortality through cardiac tamponade or exsanguination and concomitant chest or abdominal cavity injury. Case presentation We present a 39-year-old schizophrenic woman who attempted suicide with the aid of a 6.35 mm caliber handgun, after self-discontinuing of antipsychotic treatment. Lower third of sternum, right heart atrium and ventricle and inferior caval vein were hit by the bullet which consequently got lodged in the right paravertebral muscle mass at the lower thoracic vertebral level. As she was hemodynamically unstable due to hemopericardium and a huge right hemothorax, she underwent emergent surgery. Heart and inferior vena caval injuries were repaired on extracorporeal circulation. The postoperative course was uneventful and she was transferred to a psychiatric facility on the 7th postoperative day. One year after the surgery she is well, compliant to antipsychotic medications and on periodic follow-up by psychiatrists. Conclusion This case represents management of complex self-inflicted gunshot cardiac injury in a schizophrenic patient who discontinued antipsychotic medication. Liaison between themedical rescue service and high level trauma center essentially reduced injury-to-surgery time. Complex heart injury was successfully repaired on extracorporeal circulation.
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Affiliation(s)
- J Konecny
- Department of Cardiac Surgery, University Hospital, Olomouc, Czech Republic.
| | - A Klvacek
- Department of Cardiac Surgery, University Hospital, Olomouc, Czech Republic
| | - M Simek
- Department of Cardiac Surgery, University Hospital, Olomouc, Czech Republic
| | - V Lonsky
- Department of Cardiac Surgery, University Hospital, Olomouc, Czech Republic
| | - P Santavy
- Department of Cardiac Surgery, University Hospital, Olomouc, Czech Republic
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Klvacek A, Konecny J, Santavy P, Lonsky V, Simek M, Hanak V. An unusual symptoms caused by huge pseudoaneurysm formation of ascending aorta. J Cardiothorac Surg 2015. [PMCID: PMC4695752 DOI: 10.1186/1749-8090-10-s1-a337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Konecny J, Klvacek A, Santavy P, Lonsky V, Simek M. A case report of an unusual firearm injury: projectile lodged between thoracic aorta and vertebral column. J Cardiothorac Surg 2013. [PMCID: PMC3845072 DOI: 10.1186/1749-8090-8-s1-p28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Palaj J, Konecny J, Petras L, Babiak L, Kukla K, Ciganak J, Moravekova E. Radical D2 surgery for patients with gastric cancer. BRATISL MED J 2003; 103:424-7. [PMID: 12585358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
UNLABELLED The authors analyzed and prepared a report concerning 18 radical surgeries for gastric cancer that were performed between 1999-2001. Overall, 55 operation were performed, 32 radical, 18 palliative and 5 explorative laparatomies. D2 resections were performed 18 times, while D1 type 14 times. The group undergoing D2 surgery comprised of 10 men and 8 women with average age of 64.3. D2 resection included partial (8 times), or total (10) gastrectomy and lymfadenectomy of perigastric nodes, supra and infrapyloric nodes and nodes along common hepatic artery, truncus coeliacus, lienal artery, left paracardial nodes and removing capsula of pancreas. Splenectomy was performed twice. On average, 37.5 lymphnodes were removed for every operation (25-69). Operative mortality was none (0%) and morbidity was 22%. As of January 1, 2002 relaps was noted in six patients, and 5 patients died. CONCLUSION D2 resection surgeries performed by an experienced surgeon show low morbidity as well as better outcome and higher perspective for long-term survival in patients with gastric cancer. (Tab. 1, Ref. 19.).
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Affiliation(s)
- J Palaj
- Surgical Department, Hospital Bojnice, Slovakia.
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Abstract
Messenger RNA sequences often have to preserve functional secondary structure elements in addition to coding for proteins. We present a statistical analysis of retroviral mRNA which supports the hypothesis that the natural genetic code is adapted to such complementary coding. These sequences are still able to explore efficiently the space of possible proteins by point mutations. This is borne out by the observation that, in stem regions of retroviral mRNA foldings, silent mutations on one strand are preferentially accompanied by conservative mutations on the other. Distances between amino acids based on physicochemical properties are used to quantify the conservation of protein function under the constraint of maintained RNA secondary structure. We find that preservation of RNA secondary structure by compensatory mutations is evolutionary compatible with the efficient search for new variants on the protein level.
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Affiliation(s)
- J Konecny
- Theorectical Chemistry, Tech University Munich, Lichtenbergstr. 4, D 85747 Garching, Germany
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Abstract
The hypothesis that the universal genetic code is adapted to double-strand coding is supported by its remarkable compatibility with the RNY comma-less hypothesis. Coding by a triplet code on a polynucleotide double-strand allows for enciphering of five additional messages with reference to a chosen primary reading frame. Assuming the acceptance of coupled mutations on both strands, the best codon register for two overlapping messages can be inferred. The idea of evolutionarily compatible coding of two proteins by one nucleotide double-strand is extended to complementary coding for one protein in folded, single-stranded RNA.
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Abstract
We lay new foundations to the hypothesis that the genetic code is adapted to evolutionary retention of information in the antisense strands of natural DNA/RNA sequences. In particular, we show that the genetic code exhibits, beyond the neutral replacement patterns of amino acid substitutions, optimal properties by favoring simultaneous evolution of proteins encoded in DNA/RNA sense-antisense strands. This is borne out in the sense-antisense transformations of the codons of every amino acid which target amino acids physicochemically similar to each other. Moreover, silent mutations in the sense strand generate conservative ones in its antisense counterpart and vice versa. Coevolution of proteins coded by complementary strands is shown to be a definite possibility, a result which does not depend on any physical interaction between the coevolving proteins. Likewise, the degree to which the present genetic code is dedicated to evolutionary sense-antisense tolerance is demonstrated by comparison with many randomized codes. Double-strand coding is quantified from an information-theoretical point of view.
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Affiliation(s)
- J Konecny
- Tech University Munich, Garching, Federal Republic of Germany
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Abstract
Alkalimetric pH-stat titrations of cephalosporin C, cephacetril and their deacetyl derivatives using an acetyl esterase and beta-lactamase are described. The esterase was used to assay highly purified samples of cephalosporin C and cephacetril, and also to prepare analytically defined solutions of the deacetyl cephalosporins. Lactamase-catalyzed hydrolysis of the parent compounds was then found to generate exactly 2 equivalents of acid per mole; that of the deacetyl derivatives exactly 1 equivalent.
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Abstract
A very stable esterase (EC 3.1.1.-), which hydrolyses ethyl acetate, cephalosporin C and other acetyl esters with a maximum turnover number of 3-10(2) s-1, was isolated from Bacillus subtilis ATCC 6633 and immobilized on two supports: controlled-pore glass and powdered brick, a representative of carriers having a wide pore-size distribution. Carrier morphology determines diffusion rates and the expression of activity. Rate-limiting mass transfer of buffer leads to apparent losses of activity, gross distortions of molecular pH vs. activity profiles and to apparent deviations from Michaelis-Menten kinetics.
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Konecny J, Slanicka J. Proceedings: The effect of buffer diffusion on the activity of an immobilized esterase. Pathobiology 1975; 42:245-7. [PMID: 6931 DOI: 10.1159/000162768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Konecny J. Eigenschaften einer trägergebundenen Esterase. Pathobiology 1974. [DOI: 10.1159/000162590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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