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Wyświetlanie 1-15 z 14054
Tytuł:
Complex heat exchange in brake friction pairs
Złożona wymiana ciepła w parach ciernych hamulców
Autorzy:
Kernytskyy, I.
Volchenko, D.
Royko, Y.
Zhuravlev, D.
Dolishniy, B.
Bekish, I.
Rys, V.
Humeniuk, R.
Sholudko, Y.
Berezovetska, O.
Szlachetka, O.
Powiązania:
https://bibliotekanauki.pl/articles/28765641.pdf
Data publikacji:
2024
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Acta Scientiarum Polonorum. Architectura; 2024, 23; 32-43
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From diagnosis to recovery – a detailed case report on a nail bed glomus tumor
Autorzy:
Shaafie, Harris I.
Powiązania:
https://bibliotekanauki.pl/articles/40614536.pdf
Data publikacji:
2024-06-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
glomus tumor
subungual
transungual nail excision
Opis:
Introduction and aim. Glomus tumors represent benign neoplastic proliferations of the glomus body, an integral thermoregulatory component within the cutaneous microvasculature. Although they can manifest at various anatomical sites, they are predominantly observed in the subungual region. The tumors present as painful, firm, purplish, solitary nodules of the extremities, especially in the nail bed. They may be solitary or multiple; solitary lesions are encapsulated and most commonly subungual, while multiple tumors are unencapsulated and rarely subungual. Description of the case. Here, we present a case of multiple glomus tumors of the right hand in an 18-year-old female who presented with complaints of painful bluish discoloration of the right little finger for six years and progressive asymptomatic nodules on the right index finger for six months. A clinical examination revealed acute tenderness in both fingers. Love’s pin test and Hildreth’s test were positive. Excision of all lesions was done and sent for histopathology, which confirmed the diagnosis. The patient was symptom-free immediately following surgery. No nail deformities were noticed, and there was no recurrence of symptoms after one year of follow-up. Conclusion. The transungual approach is a safe and effective minimally invasive surgical technique for the treatment of symptomatic nail bed glomus tumors. It offers high success rates, promising cosmetic outcomes, and minimal complications. However, careful patient selection and meticulous surgical technique are essential to avoid potential nail deformities.
Źródło:
European Journal of Clinical and Experimental Medicine; 2024, 22, 2; 439-441
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stłuszczenie wątroby jako czynnik ryzyka chorób sercowo-naczyniowych: analiza retrospektywna danych pacjentów Kliniki Geriatrii Uniwersyteckiego Szpitala Klinicznego we Wrocławiu
Fatty liver as a risk factor for cardiovascular diseases: retrospective analysis of data from patients of the Geriatrics Clinic of University Clinical Hospital in Wrocław
Autorzy:
Szymala-Pędzik, Małgorzata
Piersiak, Marcin
Pachana, Maciej
Tomczak, Wojciech
Sobieszczańska, Małgorzata I.
Janocha, Anna
Powiązania:
https://bibliotekanauki.pl/articles/39795055.pdf
Data publikacji:
2024-07-25
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
otyłość
BMI
ryzyko sercowo-naczyniowe
hipercholesterolemia
stłuszczenie wątroby
przerost mięśnia lewej komory
obesity
cardiovascular risk
hypercholesterolemia
fatty liver disease
left ventricular hypertrophy
Opis:
Wstęp Niealkoholowa stłuszczeniowa choroba wątroby (non-alcoholic fatty liver disease – NAFLD) to obecnie najczęstsze schorzenie wątroby dotyczące ok. 25% populacji światowej. Za przyczyny jej rozwoju uznaje się nieprawidłową dietę, niską aktywność fizyczną, nadwagę i otyłość, starszy wiek, cukrzycę oraz zaburzenia lipidowe. Choroba jest uznawana przez część badaczy za wątrobową manifestację zespołu metabolicznego. Zaobserwowano, że u pacjentów z NAFLD zwiększone jest ryzyko zdarzeń sercowo-naczyniowych oraz liczba zgonów z powodu zawału mięśnia sercowego w porównaniu z populacją ogólną. Materiał i metody Przeprowadzono retrospektywną analizę danych 237 pacjentów z rozpoznanym stłuszczeniem wątroby leczonych w Klinice Geriatrii Uniwersyteckiego Szpitala Klinicznego we Wrocławiu w latach 2019–2022 pod kątem współistnienia nadwagi, otyłości i chorób współistniejących. Przeanalizowano wyniki badań laboratoryjnych oraz stopień przerostu mięśnia lewej komory serca. Do oceny przerostu mięśnia użyto ocenianych w echokardiografii parametrów: grubość przegrody międzykomorowej w rozkurczu (interventricular septal thickness in diastole – IVSd), grubość późnorozkurczowa tylnej ściany lewej komory (left ventricular posterior wall thickness in diastole – LVPWd) i IVSd + LVPWd/2. Wyniki Przeanalizowano dane 237 pacjentów: 79 mężczyzn (wiek: 77,2±7,1 roku) i 158 kobiet (wiek: 78,4±7,7 roku). Wartości wskaźnika masy ciała (body mass index – BMI) dla mężczyzn i kobiet wynosiły, odpowiednio, 30,5±5,0 kg/m² oraz 31,9±5,6 kg/m². Wykazano istnienie dodatniej korelacji między wielkością BMI a stopniem przerostu mięśnia lewej komory dla parametrów IVSd (ρ = 0,36, p < 0,001), LVPWd (ρ = 0,36, p < 0,001) i IVSd + LVPWd/2 (ρ = 0,38, p < 0,001). Wnioski W badaniu wykazano dodatnią korelację o umiarkowanej sile między wielkością BMI a stopniem przerostu mięśnia lewej komory u chorych z rozpoznanym stłuszczeniem wątroby. Wyniki te wskazują na konieczność aktywnego poszukiwania czynników ryzyka chorób sercowo-naczyniowych, w tym oceny parametrów echokardiograficznych u pacjentów z NAFLD.
Background Non-alcoholic fatty liver disease (NAFLD) is currently the most common liver disorder affecting about 25% of the global population. The causes of its development include poor diet, low physical activity, overweight, obesity, older age, diabetes, and lipid disorders. Non-alcoholic fatty liver disease is identified by some researchers as a hepatic manifestation of metabolic syndrome. It has been observed that patients with NAFLD have an increased risk of cardiovascular events, as well as a higher number of deaths from myocardial infarction compared to the general population. Material and Methods A retrospective analysis was conducted on the data of 237 patients diagnosed with hepatic steatosis, treated in the Department of Geriatrics at the University Clinical Hospital in Wrocław from 2019 to 2022, focusing on coexisting overweight, obesity, and concomitant diseases. Laboratory results and the degree of left ventricular muscle hypertrophy were analyzed. Parameters assessed by echocardiography, including interventricular septal thickness in diastole (IVSd), left ventricular posterior wall thickness in diastole (LVPWd), and IVSd + LVPWd/2, were used to evaluate left ventricular hypertrophy. Results Data from 237 patients were analyzed: 79 men (age: 77.2±7.1 years) and 158 women (age: 78.4±7.7 years). Body mass index (BMI) values for men and women were 30.5±5.0 kg/m² and 31.9±5.6 kg/m², respectively. There was a positive correlation between BMI and the degree of left ventricular hypertrophy for the parameters IVSd (ρ = 0.36, p < 0.001), LVPWd (ρ = 0.36, p < 0.001), and IVSd + LVPWd/2 (ρ = 0.38, p < 0.001). Conclusions The study demonstrated a moderate positive correlation between BMI and the degree of left ventricular hypertrophy in patients diagnosed with hepatic steatosis. These findings indicate the necessity of actively searching for cardiovascular risk factors, including the evaluation of echocardiographic parameters in patients with NAFLD.
Źródło:
Medycyna Pracy. Workers’ Health and Safety; 2024, 75, 3; 223-231
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy. Workers’ Health and Safety
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Subcultural Hierarchy and Policing amongst Incels in Online Forums
Autorzy:
Schlaerth, Christian A. I.
Puhrmann, Aaron
Bossard, Elaine
Setting, Rachel
Powiązania:
https://bibliotekanauki.pl/articles/32222632.pdf
Data publikacji:
2024
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Incels
Culture
Qualitative Sociology
Online Research
Opis:
While investigations into incels online have increased, most have focused on their potential for violence, their misogyny, extremist ideologies, and their mental health. Very little has been devoted to examining the nuances of that subcultural group. The research in this paper examines the hierarchy that has been established within the incel subculture, online, and how that hierarchy is policed using various mechanisms such as reporting “fakecels” to the moderators to have them banned and insults. Findings show that there are clear hierarchical delineations of incels in general, with “blackpill” incels being the most extreme in their worldview and their use of science (albeit cherry-picked) to justify the incel ideology. The researchers also found that there is a hierarchy specific to the online forum from which data were gathered. The paper concludes that understanding incel subculture is salient in addressing the potential threats of violence and treating those individuals who no longer want to identify as incels. Future directions of research would be to examine why boys and men identify as incels.
Źródło:
Qualitative Sociology Review; 2024, 20, 2; 6-28
1733-8077
Pojawia się w:
Qualitative Sociology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A COLREGs-compliant decision support tool to prevent collisions at sea
Autorzy:
Martelli, M.
Žuškin, S.
Zaccone, R.
Rudan, I.
Powiązania:
https://bibliotekanauki.pl/articles/24201449.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
analysis of ship collision
collision avoidance
collision avoidance decision making
collision avoidance system
anti-collision maneuvering
autonomous control unit
autonomous ship
autonomous navigation system
Opis:
Groundings and collisions still represent the highest percentage of marine accidents despite the current attention on Maritime Education and Training and the improvement of sensor capability. Most of the time, a collision is caused by a human error with consequences ranging from moderate to severe, with a substantial impact on both environment and life safeguarded at sea. In this paper, a brief statistical data regarding human element as a root cause of marine incidents together with collision regulations misunderstanding is presented as a background chapter. Furthermore, the present work discusses a decision support system architecture to suggest an appropriate action when the risk of a potential collision is detected. The proposed architecture system is based on various modules integrated with proper sensor input data regarding the surrounding navigation area. As a result, the tool can support the Officers of Watch in the decision-making process providing an early suggestion in compliance with the COLlision REGulations. The proposed system is intended to be used onboard independently from the degree of automation of the ship, and it is based on AIS, which is mandatory, making it widely applicable. The proper use of the system can considerably reduce the number of collisions, as demonstrated by the obtained results.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 347--353
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A complexity efficient PAPR reduction scheme for FBMC-based VLC systems
Autorzy:
Roshdy, Radwa A.
Hussein, Aziza I.
Mabrook, Mohamed M.
Salem, Mohammed A.
Powiązania:
https://bibliotekanauki.pl/articles/2204164.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
visible light communication
filter bank multicarrier
peak-to-average power ratio reduction
computational complexity
cube satellite communication link
inter-satellite communications
Opis:
Visible light communication based on a filter bank multicarrier holds enormous promise for optical wireless communication systems, due to its high-speed and unlicensed spectrum. Moreover, visible light communication techniques greatly impact communication links for small satellites like cube satellites, and pico/nano satellites, in addition to inter-satellite communications between different satellite types in different orbits. However, the transmitted visible signal via the filter bank multicarrier has a high amount of peak-to-average power ratio, which results in severe distortion for a light emitting diode output. In this work, a scheme for enhancing the peak-to-average power ratio reduction amount is proposed. First, an algorithm based on generating two candidates signals with different peak-to- average power ratio is suggested. The signal with the lowest ratio is selected and transmitted. Second, an alternate direct current-biased approach, which is referred to as the addition reversed method, is put forth to transform transmitted signal bipolar values into actual unipolar ones. The performance is assessed through a cumulative distribution function of peak-to-average power ratio, bit error rate, power spectral density, and computational complexity. The simulation results show that, compared to other schemes in literature, the proposed scheme attains a great peak-to-average power ratio reduction and improves the bit the error rate performance with minimum complexity overhead. The proposed approach achieved about 5 dB reduction amount compared to companding technique, 5.5 dB compared to discrete cosine transform precoding, and 8 dB compared to conventional direct current bias of an optical filter bank multicarrier. Thus, the proposed scheme reduces the complexity overhead by 15.7% and 55.55% over discrete cosine transform and companding techniques, respectively.
Źródło:
Opto-Electronics Review; 2023, 31, 1; art. no. e144919
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A data-driven approach to predict hydrometeorological variability and fluctuations in lake water levels
Autorzy:
Tan Kesgin, Remziye I.
Demir, Ibrahim
Kesgin, Erdal
Abdelkader, Mohamed
Agaccioglu, Hayrullah
Powiązania:
https://bibliotekanauki.pl/articles/28411608.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
evaporation
lake water level
precipitation
stochastic time series models
water transfer
Opis:
Beyşehir Lake is the largest freshwater lake in the Mediterranean region of Turkey that is used for drinking and irrigation purposes. The aim of this paper is to examine the potential for data-driven methods to predict long-term lake levels. The surface water level variability was forecast using conventional machine learning models, including autoregressive moving average (ARMA), autoregressive integrated moving average (ARIMA), and seasonal autoregressive integrated moving average (SARIMA). Based on the monthly water levels of Beyşehir Lake from 1992 to 2016, future water levels were predicted up to 24 months in advance. Water level predictions were obtained using conventional time series stochastic models, including autoregressive moving average, autoregressive integrated moving average, and seasonal autoregressive integrated moving average. Using historical records from the same period, prediction models for precipitation and evaporation were also developed. In order to assess the model’s accuracy, statistical performance metrics were applied. The results indicated that the seasonal autoregressive integrated moving average model outperformed all other models for lake level, precipitation, and evaporation prediction. The obtained results suggested the importance of incorporating the seasonality component for climate predictions in the region. The findings of this study demonstrated that simple stochastic models are effective in predicting the temporal evolution of hydrometeorological variables and fluctuations in lake water levels.
Źródło:
Journal of Water and Land Development; 2023, 58; 158--170
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advances in hybridised and inorganic composite metal halide perovskites : a review
Autorzy:
Farfan, Hariana I.
Roa, Karol L.
Castro, Hugo F.
Powiązania:
https://bibliotekanauki.pl/articles/27315695.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
perovskites
halides
hybrid
inorganic
composites
Opis:
In recent years, metal halide perovskites have gained significant attention due to their unique optical and electronic properties of semiconductor materials, which make them ideal for use in sustainable and energy-efficient devices. These devices include solar cells, lasers, and light-emitting diodes. Therefore, this review aims initially to provide an overview of the most important characteristics of metal halide perovskites, including their engineering development in various types, such as those based on lead or lead-free materials, like tin or germanium. Additionally, perovskites made from purely inorganic compounds like caesium bromide, chloride, or iodide, as well as hybrids mixed with organic compounds like formamidinium and methylammonium halides will be discussed. The goal is to improve their stability and efficiency. Secondly, some of the studies have proposed technologies combining electronic and mechanical characteristics of flexibility or rigidity as required, promoting their synthesis with different materials such as polymers (poly methyl methacrylate, polyvinylidene fluoride), biopolymers (starch, cyclodextrin, polylactic acid, and polylysines), among others. Finally, the subject of this work is to establish the main purpose of the research carried out so far, which is to develop simpler and more scalable processes at industrial level to achieve greater efficiency and duration in storage, exposure to visible light, critical environments, humid or high temperatures.
Źródło:
Opto-Electronics Review; 2023, 31, 4; art. no. e148221
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of jatropha oil-kerosene fuel mixtures on the performance of a variable-load direct injection CI engine
Autorzy:
Ejilah, Robinson I.
Ogbaneme, Abiodun A.
Agboneni, Osazoduwa O.
Adekunle, Sikiru O.
Powiązania:
https://bibliotekanauki.pl/articles/24202418.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
jatropha oil
kerosene
CI engine
performance
emission
olej z jatrofy
nafta
silnik o zapłonie samoczynnym
wydajność
emisja
Opis:
Jatropha oil was blended with kerosene in ratios; JOK0, JOK20, JOK30, JOK40 and JOK50 and benchmarked against conventional diesel fuel. The blended fuel samples was test-run on a TD110-TD115 TQ small CI engine test rig, and emission levels for the fuel samples were examined using an SQV automobile exhaust gas analyser. The JOK20 fuel sample offered a better performance in terms of higher BP, BTE, and EGT followed by; JOK30, JOK40 and JOK50 blends; and also exhibited lower SFC, BSEC and AFR, hence less fuel consuming than diesel fuel. A reduction in CO emission was recorded for JOK20, and a significant cut was also observed for JOK30, JOK40 blends with load increase.; while, JOK30, JOK40 and JOK50 samples exhibited higher CO2 and lower UHC emission levels than diesel. No traceable level of NOx emission was recorded for JOK20 fuel sample.
Źródło:
Combustion Engines; 2023, 62, 1; 11--18
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the genetic diversity and population structures of black locust (Robinia pseudoacacia L.) stands in Poland based on simple sequence repeat markers
Autorzy:
Szyp-Borowska, I.
Zawadzka, A.
Wojda, T.
Klisz, M.
Powiązania:
https://bibliotekanauki.pl/articles/28407488.pdf
Data publikacji:
2023
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2023, 65, 4; 187-198
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibiotic sensitivity of environmental Legionella pneumophila strains isolated in Poland
Autorzy:
Gładysz, I.
Sikora, A.
Wójtowicz-Bobin, M.
Szepeluk, A.
Matuszewska, R.
Bartosik, M.
Karczewski, J.K.
Powiązania:
https://bibliotekanauki.pl/articles/28763026.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 4; 602-605
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applicability Study of Co and Eu Extraction Using Solvent from Ca Rich HCl Solution
Autorzy:
Oh, Maengkyo
Lee, Keunyoung
Foster, Richard I.
Kim, Ik-Soo
Lee, Chang-Ha
Powiązania:
https://bibliotekanauki.pl/articles/2203724.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
solvent extraction
radioactive wastewater
waste valorization
Cyanex 272
Cyanex 301
Opis:
This study was conducted to treat radioactive acidic wastewater, which contained radioactive 60Co and 152Eu. The wastewater can be generated during a decommissioning project to reduce the volume of radioactive concrete waste from nuclear facilities. With a variety of methods for separating the radioactive nuclides available, we evaluated the separation applicability of the solvent extraction method. From our results, Co and Eu could be easily extracted from the Ca rich wastewater using Cyanex301 (Co extraction (%) 99.8, Eu extraction (%) 99.6) without Ca extraction. On the other hand, Eu could be selectively separated by Cyanex272 (Eu extraction (%) 99.1) without Co and Ca extraction at pH 2~3. Therefore, the extraction method can be tailored according to the target radionuclides present in the wastewater and be selectively applied to the overall treatment process. By extracting radioactive Co and Eu from acidic wastewater to below the discharge criteria, treated wastewater could be regarded as non-radioactive industrial waste, to be economically and easily handled. Moreover, it may be possible to reuse separated Co and Eu for research and industrial applications by realizing waste valorization.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 123--126
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of functional capacity of the elderly
Autorzy:
Wróblewska, Z.
Chmielewski, J.P.
Florek-Łuszczki, M.
Nowak-Starz, G.
Wojciechowska, M.
Wróblewska, I.M.
Powiązania:
https://bibliotekanauki.pl/articles/28761643.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 1; 156-163
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 14054

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