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Wyszukujesz frazę "Blachnio, A." wg kryterium: Autor


Wyświetlanie 1-10 z 10
Tytuł:
Wellbeing and older adults in primary health care in Poland
Autorzy:
Blachnio, A.
Buliński, L.
Powiązania:
https://bibliotekanauki.pl/articles/2082064.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
quality of life
psychogeriatrics
patient care
attitudes to health
comorbidity
geriatric health services
Opis:
Introduction and objective. The Polish health service is in need of improvement because of the increasing number of geriatric patients. Identifying the resources available to patients is important for ameliorating deficits. The goal of this research was to measure the health and wellbeing of seniors and to investigate to what extent health services meet their needs. Differences in access and scope of received services between patients from different localities (i.e villages, small towns and big cities) were analysed. Materials and method. Questionnaires (Satisfaction with Life Scale; VAS Numeric Pain Distress Scale) and a structured interview assessing the quality of healthcare were carried out in 2015 on a sample of 459 seniors. Each candidate gave consent for participation in the study. Statistica 12.5 software was used for analyses. Results. The overall measure of satisfaction with life of the respondents (M=22.34 SD=5.78) was good. Inhabitants of small towns had a significantly lower sense of quality of life than seniors from big cities (Tukey HSD = 0.047, p<.05). Multimorbidity and polypharmacy were present to a limited extent. The issue of discrimination of older individuals by medical personnel affected a fifth of seniors living in villages, and one- third of those living in big cities. Geriatric patients did not have equal opportunities for access to medical services. Conclusions. State-provided geriatric care is insufficient and does not meet the real needs of patients. A holistic care approach and/or individualized care for older adults are often indicated but are only theoretical constructs in Poland. This inefficient system places the burden of caregiving on the family of the ageing patient. Anxiety among geriatric patients is growing regarding exclusion and lack of care.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 1; 55-61
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of cigarette smoke induced chronic pancreatitis in mice is associated with increased expression of K-Ras and NF-κB
Autorzy:
Daniluk, J.
Daniluk, U.
Rogalski, P.
Swidnicka-Siergiejko, A.
Wasielica-Berger, J.
Jacek Kucharski, J.R.
Antonowicz, S.
Reszec, J.
Lotowska, J.M.
Zabielski, P.
Blachnio-Zabielska, A.
Dabrowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/28761840.pdf
Data publikacji:
2022
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2022, 29, 2; 246-251
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of applicability of thermography to assess health of gas turbine blades
Autorzy:
Kułaszka, A.
Błachnio, J.
Powiązania:
https://bibliotekanauki.pl/articles/246976.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engines
aircraft engineering
mechanical engineering
Opis:
A gas turbine is one of the most heavily loaded, both mechanically and thermally, structural components of an aircraft turbine engine. Hence, the most common reasons for failure are overheating and thermal fatigue of the blade material. It is of great significance for the safety of aeronautical systems that service is monitored; this is carried out to verify the health of these items using all available diagnostic methods. The primary aim is to detect and identify, as early as possible, any probable hazards to the engine. The preliminary assessment of the gas turbine blades condition is carried out via a visual inspection e.g. using a video borescope. During any repair, the preliminary assessment is conducted with a visual method, which is followed with some other non-destructive inspection techniques, e.g. flaw detection, intended to provide full colour images. The essential assessment of the blade condition consists in metallographic examination which precludes further operational use of the item. Probable errors in this assessment usually result in considerable cost of unnecessary repairs of the entire engine. Presented in the paper is the pulse thermography technique being a new NDT method, which is capable of diagnosing changes in the blade condition and to detect early stages of damages to turbine blades. Results of inspections of the blades subjected to high temperature and corresponding changes in signals of thermal response of the blade material stimulated with a heat pulse have also been given. Effects of the testing work have been used to detect changes, against temperature, in thermophysical properties of super alloy used in gas turbine blades. The results have been successfully verified using metallographic examination. To conclude: the thermographic method provides good reliability of the assessment of changes in the microstructure of the blade.
Źródło:
Journal of KONES; 2013, 20, 2; 237-244
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided visual inspection of the technical condition of gas turbin blades during their operation period
Autorzy:
Błachnio, J.
Kułaszka, A.
Powiązania:
https://bibliotekanauki.pl/articles/242196.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gas turbine
blade
technical condition
diagnosing
Opis:
Due to speciflc working conditions of gas turbine blades and difficult access to them their technical condition during their operation period is generally evaluated by a visual method with the aid of advanced optical devices. This paper presents the analysis of forms and kinds of gas turbine blade damages, which affect their reliability. The paper presents features of non-destructive inspection methods used for diagnosing the technical conditions of the said blades during their operation period. Special atiention was given to methods of computer aided diagnosing of the technical condition ofgas turbine blades, which increase the reliability of evaluation of the said condition and therefore reduce costs and enhance the operational safety. The process of destruction of a gas turbine blade starts with the destruction of a protective coating, in consequence of which the initial material of a blade is subject to a direct aggressive impact of the waste gas. This causes the material to directly overheat, which manifests itself in detrimental changes in its microstructure. There is need for a more common use of non-destructive methods for a current evaluation of the state of overheated aircraft engine turbine blades.
Źródło:
Journal of KONES; 2009, 16, 3; 23-30
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of unevenness and instability of flue gas temperature on the technical condition of gas turbine blades
Autorzy:
Błachnio, J.
Kułaszka, A.
Perczyński, J.
Powiązania:
https://bibliotekanauki.pl/articles/243064.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
flue gas temperature
gas turbine
blade
diagnostics
technical condition
Opis:
Gas turbines are used in the power sector, aviation, pump houses, and other technical systems. Such a broad range of application is associated with favourable indicators: high power, rather low weight per unit of power, significant efficiency, as well as high durability. All of these indicators greatly depend on the combustion chamber flue gas temperature. It is important for the flue gas temperature to be uniform around the turbine perimeter and stable over time. This condition is extremely important also in the case of frequent temperature variations associated, e.g. with a variable operating range of a manoeuvre aircraft turbojet engine. The paper analyses the causes for the unevenness and instability of combustion chamber flue gas temperature. The impact of the fuel quality, the technical condition of the fuel supply system, as well as the operating conditions of the combustion chamber-turbine assembly was shown. The issues regarding the presence of various types of damage to turbine elements, their blades in particular, were defined. The main cause behind the damage is the unevenness and instability of flue gas temperature, resulting in the presence of overheating, creeping, thermal fatigue, high-temperature corrosion of blade material. The forms of that damage, especially the first turbine stages, were presented. Blade material microstructure test results showed increased layer thickness, grain-size, and especially, adverse modification of the strengthening γ' phase in the temperature function. It was concluded periodic diagnostics of turbine blades with the optical method enables the non-invasive evaluation of their technical condition and drawing conclusions in terms of their durability.
Źródło:
Journal of KONES; 2018, 25, 2; 45-51
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation of the gas turbine blade coating and its influence on the microstructure state of the superalloy
Autorzy:
Błachnio, J.
Kułaszka, A.
Zasada, D.
Powiązania:
https://bibliotekanauki.pl/articles/244112.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
turbine
blade
heat-resistant coating
technical condition
Opis:
The technical condition of the blades has a critical influence on the reliability and life span of a gas turbine and an engine into which it is built in. The main causes of blade damage are overheating, creeping, thermal fatigue, high temperature corrosion, etc. It is often caused by adverse operational conditions or manufacturing defect, e.g. using insufficiently durable types of heat-resistant protective coatings or applied in an improper manner on the blade material. Reaction of coatings and blade material to mechanical and thermal loads depends mainly on the operating temperature of the turbine. Selection of a protective coating and material to manufacture a blade with an assumed strength must take into account its mechanical and thermal properties at maximum aerofoil temperature. The article presents characteristic forms of operational damages to the gas turbine blades of a turbojet aero engine. Distinguished were operational factors and their influence on the technical condition of coatings during the engine operation period. An influence of excess exhaust gas temperature on the condition of the heat-resistant blade layer was shown. Shown were also results of morphology tests of coating degradation types. Results of micro-structure tests of the blade superalloy after damage to the heat-resistant coating were also presented.
Źródło:
Journal of KONES; 2015, 22, 2; 17-24
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure analysis in the creep process of a gas turbine blade of the turbine engine
Autorzy:
Błachnio, J.
Kułaszka, A.
Ziętara, M.
Czyrska-Filemonowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/133291.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
turbine engine
turbine blade
loads
microstructure
rafting
Opis:
The technical condition of gas turbine blades of the turbine engine has a significant impact on the reliability and life span of the turbine and the entire engine. In order to assess the blades’ technical condition, a visual method, with the use of optoelectronic devices, is used. In order to verify this assessment, metallographic tests are conducted. The paper presents the results of microstructural tests of the turbine rotor blades made of nickel-based monocrystalline super alloys. The aim of these tests was to determine the consequences of impacting high exhaust gas temperature and stresses occurring during operation on the stability of the blade microstructure. The progress level of the blade microstructure changes in the post-operational stage for different sections towards the blade vertical axis and was compared with the blade microstructure on delivery made of the same super alloy. A varied degree of the microstructure degradation for different blade sections was shown. The changes typical of the high-temperature creep process – γ' phase directional growth (rafting), were observed only for the thinnest walls of the upper section of the turbine blade leaf.
Źródło:
Combustion Engines; 2016, 55, 2; 41-45
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of changes in the microstructure of a gas turbine blade with a non - destructive thermographic method
Autorzy:
Kułaszka, A.
Błachnio, J.
Zasada, D.
Jóźwik, P.
Powiązania:
https://bibliotekanauki.pl/articles/246861.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gas turbine
blade
pulsed thermography diagnosing
health/maintenance status
Opis:
Diagnostic methods applied nowadays to examine condition of a gas turbine blade have been discussed in the Introduction section. What follows in the body of the paper is presentation of findings on the assessment of changes in the microstructure of a gas turbine blade with a non-destructive thermographic method. A laboratory experiment performed on new turbine rotor blades made of the EI 867WD alloy has been described. The experiment consisted in holding the blades at different temperatures in the exhaust-gas environment produced by an aircraft engine supplied with jet fuel. The pulsed thermography method has been used to determine and analyse the temperature distribution upon the examined area while cooling-down after the earlier uniform warming it up with a heat pulse. Diffusion and effusion of heat in the alloy have been examined. Both phenomena are determined with thermal properties and other physical properties such as size, shape, weight, structure, chemical composition, thickness of the protective coating of the blade. Examination of the microstructure of the blade material has shown the increased thickness of the coating, grain size, and in particular disadvantageous modification in the strengthening gamma' phase against temperature. Finding the relationship between parameters of thermal responses of blade materials to heat pulse against the average size of precipitates of the gamma' phase and thickness of the aluminium protective coating enables inferences on changes in the blade material's condition. With this relationship as the basis and knowing permissible changes to the microstructure one can determine the 'fit-for-use' and 'unfit-for-use' (i.e. serviceable and unserviceable) conditions of the blades. Assuming the material criterion, i.e. some disadvantageous change in the morphology of precipitates of the gamma' phase in the EI 867WD alloy under examination, the 'fit-for-use' (serviceability) thresholds for blades affected with different temperatures have been defined.
Źródło:
Journal of KONES; 2012, 19, 2; 271-281
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of changes in the microstructure of gas turbine blades with visual and thermographic methods
Autorzy:
Błachnio, J.
Kułaszka, A.
Kornas, Ł.
Chalimoniuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/247030.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gas turbine
vane
diagnostics
thermographic method
Opis:
The processes associated with operation of turbinę avionic engines entail the occurrence of various defects affecting turbine components, in particular turbine vanes. The main reasons for defects and deterioration of gas turbine vanes include thermal fatigue and overheating of the vane material. This paper outlines the non-destructive test methods that are currently in use and that are based on an analysis of surface images obtained from the examined parts within the visible bandwidth with the use of a ring-wedge detector. Particular attention is paid to opportunities that enable unbiased diagnostics of changes in the microscopic structure of vanes with the use of the non-destructive thermographic method. Initial examinations ofthe gas turbine vanes, both new ones and those already in operation, have demonstrated the existence of interrelations and dependency between the thermal strain during the turbine operation, changes of signals associated with the thermal response from the material and the condition of the vane microstructures. The results of these examinations have been successfully verified with the use of the metallographic method. The demonstrated interrelations and dependency shall serve as a basis to develop fundamentals for a non-destructive thermographic test method intended to assess the overheating condition of the material for gas turbine vanes.
Źródło:
Journal of KONES; 2010, 17, 2; 27-34
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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