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Tytuł:
The correlation between selected anthropometric indices and BIA - based body fat measures in nursing home women aged 80+ years
Autorzy:
Zarzeczny, Ryszard
Nawrat - Szołtysik, Agnieszka
Polak, Anna
Maliszewski, Jakub
Kiełtyka, Adam
Matyja, Beata
Dudek, Magdalena
Zborowska, Joanna
Wajdman, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1031977.pdf
Data publikacji:
2016
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
Aging
Anthropometric Indices
BMI
Bioelectrical Impedance Analysis
Body Composition
Fat Mass
Older Women
Opis:
The aims of the study were to assess whether commonly used anthropometric indices are associated with body fat measures obtained by Bioel ectrical Impedance Analysis (BIA) method, and to determine the best anthropometric predictor of BIA - based body fat percentage (%Fat) and visceral fat rating (VFR) in elderly women. The sample consisted of 24 women aged 80 years and older, the residents of long - term care facilities in Upper Silesia (Poland). All women were subjected to standard anthropometric measurements including the following variables: body weight, body height, waist circumference, hip circumference and neck circumference. On the basis o f these measures Body Mass Index (BMI) as well as waist - to - hip ratio (WHR) were calculated. The subjects’ %Fat and VFR were determined by body composition analyzer TANITA BC 420MA (Japan). Pearson’s correlation coefficients were used to quantify the relati onships between variables. Stepwise multiple regression analysis with backward elimination was performed to identify possible predictors. The basic characteristics of the investigated subjects were as follows (mean±SD): age - 85.5±3.7 years; body weight - 60.4±11.6 kg; body height - 150.6±7.6 cm; BMI - 26.6±4.6 kg/m 2 ; %Fat - 31.3±9.6%; VFR - 10.7±2.5. Both of BIA - based measures significantly, positively correlated with body weight, BMI and circumferences of waist, hip and neck (r values from 0.477 to 0.835) . The multiple regression analysis for %Fat revealed that the body weight was the only variable statistically significant (r 2 =0.414; p<0.001; SEE =7.503%), and for VFR the significant β coefficients were obtained for BMI and neck circumference ( 0.625±0.133 and 0.341±0.133, respectively) ( r 2 =0.754; p<0.001; SEE =1.313). Among popular anthropometric indices of body composition in the oldest old group o f women, body weight seems to be the best predictor of body fat percentage, and VFR could be predicted by BMI along with a neck circumference.
Źródło:
Physical Activity Review; 2016, 4; 89-99
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Katyń
Autorzy:
Wajda, Andrzej.
Kunert, Andrzej Krzysztof (1952- ).
Bujnowicz, Piotr.
Współwytwórcy:
J SZ. Recenzja
Polak, Cezary. Recenzja
Marzec, Bartosz. Recenzja
Pięciak, Wojciech (1967- ). Recenzja
Kaliski, Bartosz. Recenzja
Wolski, Marcin. Recenzja
Dolin, Anton. Recenzja
Krzemiński, Adam. Recenzja
Zagańczyk, Aleksandra. Opracowanie
Data publikacji:
2007
Wydawca:
Warszawa : Pruszyński i S-ka
Tematy:
Wajda Andrzej publicystyka recenzja
Wajda, Andrzej (1926-2016)
Katyń (film; 2007) ikonografia recenzja
Katyń (film; 2007) publicystyka recenzja
Sprawa katyńska kalendarium recenzja
Egzekucja polskich oficerów w Katyniu w filmie publicystyka recenzja
Literatura polska
Fotografia polska
Film polski od 2001 r. publicystyka recenzja
Film polski od 2001 r. ikonografia recenzja
Recenzja
Album
Publicystyka
Opis:
Tyt. na okł. Delo Katyń.
Rec.: Czekając na film Wajdy / Bartosz Marzec.
Rec.: Osobisty pomnik Andrzeja Wajdy / Wojciech Pięciak.
Rec.: Świadectwo zbrodni.
Rec.: Zanim pójdziemy do kina zobaczymy film "Katyń" w książce / J. Sz.
Rec.: Opowieść o kinie i okrutnej zbrodni / Cezary Polak.
Rec.: Trzy żałoby / Adam Krzemiński.
Rec.: Ruś pospolita : między patosem a polityką / Anton Dolin.
Rec.: Tajemnica i kłamstwo / Bartosz Kaliski.
Rec.: Album z miejsca zbrodni / Marcin Wolski.
Omów.: Zanim pujdziemy do kina, zobaczmy film "Katyń" w książce / j.sz.
Dostawca treści:
Bibliografia CBW
Książka
Tytuł:
Comparison of information on sleep apnoea contained in two symmetric EEG recordings
Autorzy:
Prucnal, Monika A.
Polak, Adam G.
Powiązania:
https://bibliotekanauki.pl/articles/220736.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sleep apnoea detection
EEG signal
discrete wavelet transforms
Hilbert transforms
analysis of variance
multivariate regression analysis
Opis:
Electroencephalogram (EEG) is one of biomedical signals measured during all-night polysomnography to diagnose sleep disorders, including sleep apnoea. Usually two central EEG channels (C3-A2 and C4-A1) are recorded, but typically only one of them are used. The purpose of this work was to compare discriminative features characterizing normal breathing, as well as obstructive and central sleep apneas derived from these central EEG channels. The same methodology of feature extraction and selection was applied separately for the both synchronous signals. The features were extracted by combined discrete wavelet and Hilbert transforms. Afterwards, the statistical indexes were calculated and the features were selected using the analysis of variance and multivariate regression. According to the obtained results, there is a partial difference in information contained in the EEG signals carried by C3-A2 and C4-A1 EEG channels, so data from the both channels should be preferably used together for automatic sleep apnoea detection and differentiation.
Źródło:
Metrology and Measurement Systems; 2019, 26, 2; 229-239
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-channel EEG processing for sleep apnea detection and differentiation
Autorzy:
Prucnal, Monika A.
Polak, Adam G.
Powiązania:
https://bibliotekanauki.pl/articles/27311744.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
single-channel EEG
sleep apnea detection
optimization of signal processing
medical decision support
Opis:
Sleep apnea syndrome is a common sleep disorder. Detection of apnea and differentiation of its type: obstructive (OSA), central (CSA) or mixed is important in the context of treatment methods, however, it typically requires a great deal of technical and human resources. The aim of this research was to propose a quasi-optimal procedure for processing single-channel electroencephalograms (EEG) from overnight recordings, maximizing the accuracy of automatic apnea or hypopnea detection, as well as distinguishing between the OSA and CSA types. The proposed methodology consisted in processing the EEG signals divided into epochs, with the selection of the best methods at the stages of preprocessing, extraction and selection of features, and classification. Normal breathing was unmistakably distinguished from apnea by the k-nearest neighbors (kNN) and an artificial neural network (ANN), and with 99.98% accuracy by the support vector machine (SVM). The average accuracy of multinomial classification was: 82.29%, 83.26%, and 82.25% for the kNN, SVM and ANN, respectively. The sensitivity and precision of OSA and CSA detection ranged from 55 to 66%, and the misclassification cases concerned only the apnea type.
Źródło:
Metrology and Measurement Systems; 2023, 30, 2; 323--336
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja zastosowania systemu ogniwa paliwowego PEM do zasilania pojazdu podwodnego = A concept for application of a PEM fuel cell in an underwater vehicle
Autorzy:
Polak, Adam.
Powiązania:
Zeszyty Naukowe / Akademia Marynarki Wojennej im. Bohaterów Westerplatte 2014, nr 1(196), s. 73-88
Data publikacji:
2014
Tematy:
Statki powietrzne bezzałogowe dane taktyczno-techniczne
Ogniwa paliwowe stosowanie
Postęp techniczny
Opis:
Fot., rys., tab.
Bibliogr.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Multi-symptom measurement based fault detection of the PEM fuel cell system
Autorzy:
Polak, Adam
Kluczyk, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/11542695.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
PEM fuel cell
failure detection
oxygen starvation
cell flooding
acoustic emission
ogniwo paliwowe PEM
wykrywanie awarii
emisja akustyczna
Opis:
The proper functioning of the fuel cell system depends on the proper operation of all its subsystems. One of the key subsystems is the oxidant supply system, which is responsible for supplying oxygen for the electrochemical reaction taking place in the cell. It also transports the reaction products, i.e., water, outside the fuel cell stack, and in some cases removes excess heat generated in the stack. Changes in the technical condition of machine individual elements always result in changes in operating or residual parameters; however, it is necessary to select appropriate diagnostic methods to be able to use these changes to assess the machine’s technical condition. This article presents the results of research focused on assessing the possibilities of diagnosing the oxidant supply subsystem, in particular, too low an oxidant flow leading to oxygen starvation and cathode flooding, based on the analysis of the voltage occurring in individual cells of the stack as well as on the basis of vibration and acoustic emission (AE) measurements. The presented results show that the faulty operation of that system can be indicated either through electrical and vibroacoustic/acoustic emission measurements.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 2; 197--205
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł

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