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Search results for: destructive entrepreneurship
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Selective Potentiation of Peripheral Chemoreflex Sensitivity in Obstructive Sleep Apnea
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Cardiovascular Function in Obstructive Sleep Apnea Patients with Controlled Hypertension
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NUMERICAL MODEL OF PLASTIC DESTRUCTION OF THICK STEEL STRUCTURAL ELEMENTS
PublicationIn the shipbuilding industry, the risk of brittle fracture of the structure is limited by using certified materials with specified impact strength, determined by the Charpy method (for a given design temperature) and by supervising the welding processes (technology qualification, production supervision, non-destructive testing). For off-shore constructions, classical shipbuilding requirements may not be sufficient. Therefore, the...
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Non-Destructive Testing of the Longest Span Soil-Steel Bridge in Europe—Field Measurements and FEM Calculations
PublicationThe article describes interdisciplinary and comprehensive non-destructive diagnostic tests of final bridge inspection and acceptance proposed for a soil-steel bridge made of corrugated sheets, being the European span length record holder (25.74 m). As an effect of an original concept a detailed and precise information about the structure short-term response was collected. Periodic diagnostics of bridge deformations was done one...
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Valorization of waste cabbage leaves by postharvest photochemical treatments monitored with a non-destructive fluorescence-based sensor
PublicationThe biosynthesis of polyphenolic compounds in cabbage waste, outer green leaves of white head cabbage (Brassica oleracea L. var. capitata subvar. alba), was stimulated by postharvest irradiation with UVB lamps or sunlight. Both treatments boosted the content of kaempferol and quercetin glycosides, especially in the basal leaf zone, as determined by the HPLC analysis of leaf extracts and by a non-destructive optical sensor. The...
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Non-Destructive Testing of a Sport Tribune under Synchronized Crowd-Induced Excitation Using Vibration Analysis
PublicationThis paper presents the concept of repairing the stand of a motorbike speedway stadium. The synchronized dancing of fans cheering during a meeting brought the stand into excessive resonance. The main goal of this research was to propose a method for the structural tuning of stadium stands. Non-destructive testing by vibration methods was conducted on a selected stand segment, the structure of which recurred on the remaining stadium...
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Non-Destructive Diagnostics of Concrete Beams Strengthened with Steel Plates Using Modal Analysis and Wavelet Transform
PublicationExternally bonded reinforcements are commonly and widely used in civil engineering objects made of concrete to increase the structure load capacity or to minimize the negative effects of long-term operation and possible defects. The quality of adhesive bonding between a strengthened structure and steel or composite elements is essential for effective reinforcement; therefore, there is a need for non-destructive diagnostics of adhesive...
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A study on microcrack monitoring in concrete: discrete element method simulations of acoustic emission for non-destructive diagnostics
PublicationThe research is focused on the monitoring of fracture evolution in concrete beams under three-point bending using the acoustic emission technique and the discrete element method. The main objective of the study was to numerically and experimentally investigate the mechanism behind the generation of elastic waves during acoustic emission events and their interaction with micro- and macro-cracking in concrete beams under monotonic...
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Exploring the Role of Ownership in International Entrepreneurship: How does Ownership Affect Internationalisation of Polish Firms?
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Methodology of entrepreneurship teaching in tertiary education - experiences of the Faculty of Economics and Management on the Gdansk University of Technology
PublicationThe purpose of the chapter is an overview of the available methods and techniques of teaching entrepreneurship at the academic level, as well as the presentation of the methodology of the work with students within the framework of the Entrepreneurship course at the Faculty of Management and Economics of the Gdańsk University of Technology.
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Interspecific and intraspecific variation in organochlorine pesticides and polychlorinated biphenyls using non-destructive samples from Pygoscelis penguins
PublicationAs humans are present in Antarctica only for scientific and tourism-related purposes, it is often described as a pristine region. However, studies have identified measurable levels of Persistent Organic Pollutants (POPs), such as organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), in the Antarctic region. These are highly toxic anthropogenic compounds with tendency to travel long distances and reach remote environments, where...
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Obstructive sleep apnea and heart rate asymmetry microstructure during sleep
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Application of photocatalytic paint for destruction of benzo[a]pyrene. Impact of air humidity
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Recent weight gain in patients with newly diagnosed obstructive sleep apnea
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Obesity, Bariatric Surgery and Obstructive Sleep Apnea—A Narrative Literature Review
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Removal of BTEX Compounds From Waste Gases; Destruction and Recovery Techniques
PublicationThe tendency for BTEX compounds (benzene, toluene, ethylbenzene, xylenes) to spread into all compartments of the environment together with their influence on both ecosystem and human health means that the emission of thesecompounds into the air is becoming the matter of worldwide concern. The legal regulations introduced by the European Union governing the assessment and management of air quality obliges member states to systematically...
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An application supporting the educational process of the respiratory system obstructive diseases detection
PublicationThe paper presents a description of functioning of a platform supporting the detection of obstructive diseases in the respiratory system education process. A 16-parameter model of the respiratory system simulated in the MATLAB/Simulink environment was set in the role of the tested patient. It has been linked to the control layer, developed in the LabVIEW environment, using the SIT library (Simulation Interface Toolkit). This layer...
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Entrepreneurship in small and medium-sized enterprises: Comparative study between Slovakia and Poland for the years 2001–2007
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An adaptive approach to non-destructive evaluation (NDE) of cast irons containing precipitated graphite particles with the help of magnetoacoustic emission
PublicationPhysical properties of cast irons strongly depend on both their microstructure and the presence of casting defects. The paper analyses the possibility of application of magnetoacoustic emission (MAE) for nondestructive detection of flawed cast iron components. The investigated samples containing dross, chunky graphite and lamellar graphite were compared with the reference, flawless, spheroidal cast iron sample. The optimisation...
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Damage imaging algorithm for non-destructive inspection of CFRP/steel adhesive joints based on ultrasonic guided wave propagation
PublicationThe paper concerns assessing the quality of the adhesive connection between a steel plate and the reinforcing CFRP laminate. A three-stage algorithm for non-destructive damage imaging was developed. As the first step, an initial study involving dispersion curves of joint components was executed to determine the material parameters and the appropriate excitation frequency. During the second step, damage identification in three-layer...
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Typology, current state and non-destructive testing of timber roof trusses of historic churches in the West Vistula Delta, Poland
PublicationThis paper presents the current state of conservation of historic roof churches located in the Żuławy of Gdańsk (Poland). It also describes the architecture of these temples, the region itself and old carpentry techniques for constructing roof trusses. Interdisciplinary tests were carried out in six churches. The geometry of the load bearing structures, the moisture content and the carpentry technique were specified. The field...
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Destruction of shell structures under the dynamic load on the human skull trauma basis
PublicationThe main aim of this work is to investigate patterns of potential orbital bone fractures due to mechanical injuries. The solution of the main problem is followed by analysis of several testing examples having straight correlation with civil engineering structures, in which materials of wide range of stiffness are applied. To solve the main problem, the three-dimensional finite element method (FEM) model of the orbital region has...
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Exhaled nitric oxide in smokers and former smokers with chronic obstructive pulmonary disease
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Socio-Cultural Standards Promoted by the Mass Media as Predictors of Restrictive and Bulimic Behavior
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Emotional enhancement of memory effect in obstructive sleep apnea syndrome - preliminary results
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Baroreflex Control of Sympathetic Nerve Activity and Heart Rate in Obstructive Sleep Apnea
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Increases in leptin levels, sympathetic drive, and weight gain in obstructive sleep apnea
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The Study Program of "Entrepreneurship and Finance" at the University of Economics in Katowice as an Example of Practical Education in Poland’s Higher Education System
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Entrepreneurship Vulnerability to Business Cycle. A New Methodology for Identification Pro-cyclical and Counter-cyclical Patterns of Entrepreneurial Activity
PublicationIn literature, there is ongoing discussion whether entrepreneurial activity, approximated by, for instance, changes in self-employment, tends to behave pro-cyclically, counter-cyclically or rather is a-cyclical. Thus far, both theoretical and empirical evidence, where various multiple methodological approaches are used, does not provide clear answer to the latter; while widely offered explanations are scattered and lack robustness....
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Patients with obstructive sleep apnea present with chronic upregulation of serum HIF-1α protein
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Body Dissatisfaction, Restrictive, and Bulimic Behaviours among Young Women: A Polish–Japanese Comparison
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A response to “Cardiovascular disease and obstructive sleep apnea: an underappreciated role for increased platelet activity?”
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Serum of obstructive sleep apnea patients impairs human coronary endothelial cell migration
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Obstructive sleep apnea and intermittent hypoxia increase expression of dual specificity phosphatase 1
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Unresectable malignant obstructive jaundice: a 2-year experience of EUS-guided biliary drainage
PublicationObjectives: Endoscopic biliary drainage is a first-line treatment in patients with unresectable malignant biliary obstruction. In most cases the drainage is conducted using endoscopic retrograde cholangiopancreatography (ERCP). Percutaneous transhepatic biliary drainage or endosonography-guided biliary drainage (EUS-BD) represents therapeutic options after unsuccessful ERCP. Here we report on 2 years experience in the management...
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REVISING ENTREPRENEURIAL ORIENTATION (EO) IN SOCIAL ENTREPRENEURSHIP, QUALITATIVE EVIDENCE FROM WORK INTEGRATION SOCIAL ENTERPRISES (WISES) FROM POLAND
PublicationEntrepreneurial behaviour and entrepreneurial orientation (EO) of (commercial) entrepreneurship. have received significant scholarly attention in entrepreneurship and management research However, there are insufficient attempts discussing such behaviour and EO in non-profit, and particularly social entrepreneurship context, arguing that EO is higher in such contexts, or remains the same, some new EO dimensions are proposed, existing...
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Forty‐two normomenstruating adolescents with Müllerian obstructive anomalies: Presentation, pitfalls in the dagnosis and surgical management
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Parasomnias and obstructive sleep apnea syndrome: in search for a parasomnia evaluating tool appropriate for OSAS screening
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Renal artery denervation for treatment of patients with self-reported obstructive sleep apnea and resistant hypertension
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Telomere Length and Risk of Major Adverse Cardiac Events and Cancer in Obstructive Sleep Apnea Patients
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Contribution of Tonic Chemoreflex Activation to Sympathetic Activity and Blood Pressure in Patients With Obstructive Sleep Apnea
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Nocturnal Continuous Positive Airway Pressure Decreases Daytime Sympathetic Traffic in Obstructive Sleep Apnea
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Correlation between destruction of the metal surface caused by pitting corrosion and intensity of the observed electrochemical noise.
PublicationPrzedstawiono wyniki badań korelacji między intensywnością szumów elektrochemicznych obserwowanych podczas występowania procesów korozji wżerowej a zmianami obserwowanymi na powierzchni metalu.Badania przeprowadzono dla elektrod metalowych o powierzchni eksponowanej na środowisko korozyjne poniżej 1 mm2. Do wykrywania uszkodzeń powierzchni wykorzystano oprogramowanie MatLab, wykrywające uszkodzenia powierzchni metalu w formie okręgów...
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Exergetic Analysis of the nCO2PP Cycle with Particular Reference to the Exergy Destruction of Sewage Sludge Due to Gasification
PublicationAn exergy analysis is carried out on the negative CO2 emission gas power plant (nCO2PP), which integrates the process sections of fuel preparation, power generation and carbon capture. Processes of exergy destruction are studied with particular focus on the process in the gasification unit of the fuel preparation section, where a large amount of exergy is destroyed in various chemical reactions from sewage sludge to producer gas...
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Analysis of load carrying capacity and destruction mechanism of an intermediate anchorage steel plate for pillar jib crane
PublicationPillar jib cranes are often mounted to existing floors with the use of an intermediate anchorage steel plate instead of using independent foundations, what is shown in the figure. Standards for steel design provide only basic rules for the design of such an intermediate plate. This study presents a simple design approach by using a numerical model in order to analyze different parameters that have significant influence in the anchorage...
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Non-destructive Diagnostics of the Floor in the Gdańsk Crane Using Ground Penetrating Radar = Diagnostyka nieniszcząca posadzki w gdańskim Żurawiu z zastosowaniem metody georadarowej
PublicationThis paper presents the results of a ground penetrating radar (GPR) survey carried out at the Crane in Gdańsk. The measurements were conducted on the floor of the southern and northern towers. The aim of the experiment is to assess the possibility of detecting anomalies beneath the floor. The surveys were carried out in a non-destructive manner, using a georadar unit with 2 GHz and 400/900 MHz antennas. This paper compares the...
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Correlation between destruction of the metal surface caused by pitting corrosion and intensity of the observed electrochemical noise (Invited Paper)
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Preclusion of irreversible destruction of Dr adhesin structures by a high activation barrier for the unfolding stage of the fimbrial DraE subunit
PublicationFimbrie Dr uropatogennych szczepów Escherichia coli stanowią przykład eksponowanych powierzchniowo struktur adhezyjnych podlegających biogenezie według zakonserwowanego, pośród bakterii Gram-ujemnych, systemu "chaperone-usher" ("białko opiekuńcze-zewnątrzbłonowe białko kanałowe"). Powyższe struktury adhezyjne są niezbędne w procesie specyficznej adhezji bakterii do receptorów zlokalizowanych na powierzchni docelowych komórek gospodarza....
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Electrochemical Evaluation of the Compact and Nanotubular Oxide Layer Destruction under Ex Vivo Ti6Al4V ELI Transpedicular Screw Implantation
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Activity ofα1-Antitrypsin and Some Lysosomal Enzymes in the Blood Serum of Patients with Chronic Obstructive Pulmonary Disease after Smoking Cessation
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