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Tytuł:
A new six-DoF parallel mechanism for captive model test
Autorzy:
Lu, Yun
Wu, Jinbo
Li, Weijia
Wu, Yaozhong
Powiązania:
https://bibliotekanauki.pl/articles/1585037.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hydrodynamic coefficient
six DoF parallel mechanism
six component balance
captive model test
Opis:
In order to obtain the hydrodynamic coefficients that can save cost and meet the accuracy requirements, a new hydrodynamic test platform based on a 6DoF (six degrees of freedom) parallel mechanism is proposed in this paper. The test platform can drive the ship to move in six degrees of freedom. By using this experimental platform, the corresponding hydrodynamic coefficients can be measured. Firstly, the structure of the new device is introduced. The working principle of the model is deduced based on the mathematical model. Then the hydrodynamic coefficients of a test ship model of a KELC tank ship with a scale of 1:150 are measured and 8 typical hydrodynamic coefficients are obtained. Finally, the measured data are compared with the value of a real ship. The deviation is less than 10% which meets the technical requirements of the practical project. The efficiency of measuring the hydrodynamic coefficients of physical models of ships and offshore structures is improved by the device. The method of measuring the hydrodynamic coefficients by using the proposed platform provides a certain reference for predicting the hydrodynamic performance of ships and offshore structures.
Źródło:
Polish Maritime Research; 2020, 3; 4-15
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absolute and relative reliability of several measures of static postural stability calculated using a GYKO inertial sensor system
Autorzy:
Jaworski, Janusz
Ambroży, Tadeusz
Lech, Grzegorz
Spieszny, Michał
Bujas, Przemysław
Żak, Michał
Chwała, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/27324151.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
balance
postural stability
accelerometer
test-retest reliability
intraclass correlation coefficient
balans
stabilność postawy
akcelerometr
niezawodność testu-retestu
współczynnik korelacji wewnątrzklasowej
Opis:
The aim of this study was to analyse absolute and relative reliability of a number of postural static stability measures obtained from a GYKO inertial sensor system in young adults. Methods: The study examined 29 healthy non-athlete young adults. A test was performed for 30 s while standing on one foot, without moving, with eyes open and arms relaxed along the sides of the body. The examinations were performed twice, with a one-week interval. Relative reliability was measured using the intraclass correlation coefficient (ICC) and the 95% confidence interval (95% CI), whereas the absolute reliability was evaluated based on the standard error of measurement (SEM) and the minimal detectable change (MDC). Results: The results of this study showed moderate to good relative reliability scores for all the postural stability measures, with ICC values ranging from 0.62 to 0.70. For most of the analysed variables, SEM% ranged from ca. 10 to 14%. Relatively high SEM% values were obtained only for two variables (Area, Convex Hull Area). Conclusions: The low costs of GYKO inertial sensor systems, the fast and easy installation, the mobility and high reliability of the measurement of postural stability show that it can be effective alternative to stabilographic platforms.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 2; 93--99
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Balance control of children and adolescents suffering from vertigo symptoms: in what way posturography is helpful in clinical evaluation of vestibular system pathology?
Autorzy:
Szczerbik, Ewa
Iwanicka-Pronicka, Katarzyna
Syczewska, Małgorzata
Kalinowska, Małgorzata
Graff, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/306568.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
dzieci
zawroty głowy
test równowagi
children
vertigo
balance
stable surface
Opis:
The aim of the study was to determine balance parameters in a group of young patients with vertigo symptoms and to verify posturography helpfulness in clinical evaluation of vestibular system pathology. Methods: 77 children and adolescents of age 3–18 suffering from vertigo episodes participated in the study (46 girls, 31 boys). They underwent audiology objective tests and balance test on stable surface. Calculated balance parameters were analyzed in reference to: eyes opened and closed, age influence, sway comparison in anterior-posterior and medial-lateral, differences between subgroups with and without vestibular deficits. Discriminant analysis was performed to assess classification ability to impaired group in two cases: only balance parameters and both audiology and balance parameters. Results: Patients with vertigo symptoms generally keep their balance properly on stable surface. Balance parameters do not depend on presence of vestibular system pathology. Values increased in eyes closed conditions. Left/Right and Anterior/Posterior differences were not statistically significant. The negative correlation between age and some balance parameters is present, stronger in the case of eyes opened and weaker or absent in vestibular impaired group. Also, correlations between axes were found, higher in impaired group in comparison with not impaired one. Conclusions: Discrimination based on balance parameters is poor not comparable to one built on combined: audiology and balance parameters, so typical balance parameters’ analysis is not so useful in clinical practice when the reason of vertigo episodes should be assessed, but verify compensation process and measure with objective numbers the progress of recovering, the actual functional patient’s status.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 1; 73-78
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of oxidation and mechanical damage of PCBs with OSP finish on their solderability with SAC305 alloy
Wpływ utleniania i uszkodzeń mechanicznych powierzchni płytek PCB z pokryciem OSP na ich lutowność stopem SAC305
Autorzy:
Kudyba, A.
Siewiorek, A.
Sobczak, N.
Turalska, P.
Powiązania:
https://bibliotekanauki.pl/articles/391438.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
surfaces
coatings
electronic characterization
defects
surface properties
solderability
wetting balance test
powłoki
wady
właściwości powierzchni
lutowność
badania meniskograficzne
Opis:
The paper focuses on the experimental investigation of wetting behavior and solderability of commercial lead-free solder on Printed Circuit Board (PCB) covered with an OSP finish (Organic Surface Protectant) characterized by physical (mechanically scratched) and/or chemical (oxidized in air at 260°C for 1 hour) inhomogeneity of the surface finish. The influence of the quality of the PCB finish on the maximum wetting force Fmax, wetting time t0, the contact angle θ, and the parameters characterizing solderability, were studied. The tests were performed by a wetting balance method with SAC305 solder (Sn-3.0Ag-0.5Cu, wt. %) and commercial flux (EF2200) using MENISCO ST88 apparatus allowing direct measurement of the wetting force Fr and wetting time t0 as well as calculation of the contact angle θ values. The measurements were made at a temperature of 260°C for a contact time of 3 s. For comparison, the tests were also performed on PCBs in delivery state showing average Fmax = 0.9 mN, t0 = 0.58 s and θ = 57°. The results have shown that both oxidation and mechanical damage of the OSP finish have a significant worsening effect on solderability. Scratched OSP finish had an average Fmax = -1.03 mN and θ = 78°. Such surfaces were non-wettable with corresponding values of Fmax = -4.7 mN and θ = 120° for oxidized samples and Fmax = -4.04 mN and θ = 111° for those scratched and oxidized.
W pracy badano zwilżalność i lutowność płytek drukowanych (PCB) z pokryciem OSP, które charakteryzowały się niejednorodnością występującą na powierzchni: były mechanicznie porysowane i/lub utlenione (na powietrzu, w temperaturze 260°C w czasie 1 godziny). Do badań stosowano komercyjny stop bezołowiowy. Określono wpływ jakości pokrycia na wartość maksymalnej siły zwilżania Fmax, czas zwilżania t0 i kąt zwilżania θ, czyli parametrów charakteryzujących lutowność. Badania prowadzono metodą zanurzeniową (meniskograficzną) na aparaturze ST88 MENISCO, która umożliwia bezpośredni pomiar siły zwilżania Fr i czasu zwilżania t0, jak również obliczenie wartości kąta zwilżania θ. Pomiary przeprowadzono w temperaturze 260°C w czasie 3 s. Dla porównania testy przeprowadzono również na płytkach „w stanie dostawy”, uzyskując średnią Fmax = 0.9 mN, t0 = 0,58 s i θ = 57°. Uzyskane wyniki świadczą, że zarówno utlenianie powierzchni, jak i uszkodzenia mechaniczne pokrycia OSP powodują znaczące pogorszenie lutowości płytek PCB. Dla pokrycia OSP, które było porysowane, uzyskano średnio Fmax = -1,03 mN i θ = 78°. Dla próbek utlenionych mierzone wartości wyniosły: Fmax = -4,7 mN i θ = 120°, natomiast dla próbek porysowanych i utlenionych: Fmax = -4,04 mN i θ = 111°.
Źródło:
Prace Instytutu Odlewnictwa; 2015, T. 55, nr 4, 4; 59-66
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energetic balance of unmanned ground vehicle hybrid power transmission
Autorzy:
Karczewski, M.
Szczęch, L.
Polak, F.
Powiązania:
https://bibliotekanauki.pl/articles/242808.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
balance
unmanned vehicle
hybrid transmission
test stand
Opis:
Article presents the energetic balance of small-unmanned vehicle hybrid power transmission. The vehicle equipped with series hybrid transmission consisted of electric engines connected to the battery pack and small Diesel power generator. In mentioned construction, battery is used as energy buffer and combustion engine is used more as emergency power supply, and is turned on when battery is depleted. In other condition, power generator can be turned off, without reducing power of transmission parameters, except its range. Investigation was divided on two stages. At first stage generator, charging unit and battery were placed outside the vehicle. One piston power generator was feed by Diesel fuel. Fuel consumption of power generator was recorded from AVL fuel balance and energy parameters were recorded by power line analyser of BMR Company. Generator was connected to the direct current power plant. 70 Ah and 48 DC Lithium-polymer battery was charged from the power plant. After charging cycle, small water resistor was used to discharge the battery. Power parameters of discharged battery were measured. This enable to measure balance form tank to the battery. Second stage of the energetic balance determination was to measure internal resistances of vehicle power transmission from current inverter/converter connected to the engine and through the transmission up to the wheels of the vehicle. Power loss of energy at different speed of vehicle wheels without ground contact was measured in respect of power consumption. The series hybrid transmission is consider less efficient than parallel but because of specific configuration of power transmission, it was possible to reach higher efficiency
Źródło:
Journal of KONES; 2018, 25, 2; 177-184
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy balance of a prosument microinverter on-grid photovoltaic system
Bilans energetyczny prosumenckiego mikroinwerterowego systemu fotowoltaicznego dołączonego do sieci
Autorzy:
Sarniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/792265.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
photovoltaic module
energy balance
monitoring system
software
test stand
solar energy
monocrystalline module
polycrystalline module
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy balance of a vehicle equipped with hybrid propulsion system fuelled with alternative fuels
Autorzy:
Karczewski, Mirosław
Szczęch, Leszek
Polak, Filip
Powiązania:
https://bibliotekanauki.pl/articles/243575.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy balance
unmanned vehicle
hybrid transmission
test stand
Opis:
Article presents the energetic balance of small-unmanned vehicle hybrid power transmission. The vehicle equipped with serial hybrid transmission consisted of electric engines connected to the battery pack and small Diesel power generator. In mentioned construction, battery is used as energy buffer and combustion engine is used more as emergency power supply, and is turned on when battery is depleted. In other condition, power generator can be turned off, without reducing power of transmission parameters, except its range. Vehicles with hybrid drive are very common chosen vehicles by users. More and more often, we also talk about searching for replacement fuels for internal combustion engines, so also for those with hybrid drive. The research was carried out on an unmanned land platform equipped with a hybrid propulsion system supplied as standard with Diesel oil. The article presents the problems of comparing the efficiency of a hybrid vehicle fuelled with Diesel oil, but also with alternative fuels based on kerosene and other components. For test, three types of fuels were used, standard Diesel oil, F-34 and with experimental mixture of Jet A-1 fuel with 10% of 2-ethylhexanol. Energy used for charging of the battery, from tank-to-wheel, was calculated. This also enables to calculate total efficiency of such hybrid power transmission, powered with different fuels.
Źródło:
Journal of KONES; 2019, 26, 4; 91-96
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the accuracy of the postural stability measurement with the Y-Balance Test based on the levels of the biomechanical parameters
Autorzy:
Walaszek, R.
Chwała, W.
Walaszek, K.
Burdacki, M.
Błaszczuk, J.
Powiązania:
https://bibliotekanauki.pl/articles/306519.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biomechanika
staw kolanowy
stabilność postawy
testy
biomechanics
motor control
postural stability
Y-Balance Test
structure test
Opis:
The testing of dynamic balance involves tests that assess the muscle control of spatial changes of the position of the centre of gravity over the base of support. The purpose of this work was to determine the structure of the Y-balance test and its accuracy based on the measurements of strength performance of the muscles acting on the knee joint, as well as the flexibility and balance in boys aged 14 years. Methods: The study included 43 schoolboys regularly participating in physical education lessons. The examination of postural stability was conducted with the use of the Y-balance test. The measurements of muscle strength and of resistance to fatigue of the extensors and flexors of knee joints in isometric contraction were performed on a measurement stand in a standard position with the use of tensometric sensors. The measurement of mobility range of the lower extremity joints was performed according to the SFTR. The examination of balance was performed with the use of the modified ‘Flamingo balance test’. Results: The factor structure of the Y-balance test results for the left and right lower extremities is similar and includes five principal independent factors that characterise the structure of analysed variables. They explain 76% and 74% of communality in total for the left and the right extremity, respectively. Conclusions: The extracted factor structure points to a hybrid structure of the Y-balance test and shows its accuracy in the measurements of the lower limb joint mobility and strength performance of knee joint extensors.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 2; 121-128
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement and analysis of the distribution of body weight in patients after stroke
Pomiar i analiza rozkładu masy ciała u pacjentów po udarze mózgu
Autorzy:
Wyszyński, Sz.
Brzęk, A.
Famuła, A.
Stiler, S.
Jarski, P.
Ziaja, D.
Powiązania:
https://bibliotekanauki.pl/articles/261808.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki. Katedra Inżynierii Biomedycznej
Tematy:
tandem balance test
stability
balance
stroke
test dwóch wag
stabilność
równowaga
udar mózgu
Opis:
The study objective was to evaluate the impact of a ten-day rehabilitation process on the change of the distribution of body mass and the load on the lower limbs, using the tandem balance test and the modified tandem balance test in a sitting position in stroke patients. The distribution of load on the lower limbs found its expression in the index, referred to as the Kwolek index, which was developed. It was calculated as the quotient of the greater value to the lesser one, both obtained in the tandem balance test; the normal limits ranged from 1.00 to 1.15. Material and methods. The test group comprised of 60 stroke patients. 30 people were qualified to the control group. The basis for the analysis was the measurements of the distribution of body mass and load on the lower limbs in the tandem balance test and in the modified tandem balance test. The distribution of body mass test was carried out on the first and last day of rehabilitation. The rehabilitation of ischaemic stroke patients involved comprehensive physiotherapy. Results. When analyzing the distribution of body mass symmetry before and after the therapy in both the control group and the test group, an increase in the number of people was observed in the groups with a lower Kwolek index, whereas a decrease was present in the number of people in groups with a higher Kwolek index. Conclusions. Comprehensive rehabilitation affects the improvement of the distribution of body mass.
Celem badań była ocena wpływu dziesięciodniowej rehabilitacji na zmianę rozkładu masy ciała oraz obciążenie kończyn dolnych przy użyciu testu dwóch wag oraz zmodyfikowanego testu dwóch wag w pozycji siedzącej u pacjentów po udarze mózgu. Wykorzystano do tego między innymi indeks Kwolka, który obrazuje rozkład masy ciała w teście dwóch wag. Indeks Kwolka wyrażany jest jako iloraz wartości większej do mniejszej uzyskanej w standardowym lub zmodyfikowanym teście dwóch wag. Materiał i metoda. Badaniom zostało poddane 96 osób. Grupę badaną stanowiło 60 pacjentów po udarze mózgu. Do grupy kontrolnej zakwalifikowano 30 osób. Podstawą analizy były pomiary rozkładu masy ciała i obciążenia kończyn dolnych w teście dwóch wag oraz zmodyfikowanym teście dwóch wag (w pozycji siedzącej). Badanie rozkładu masy ciała wykonano w pierwszym oraz ostatnim dniu rehabilitacji. Rehabilitacja pacjentów po niedokrwiennym udarze mózgu polegała na kompleksowej fizjoterapii. Wyniki. Analizując rozkład symetryczności masy ciała przed oraz po terapii zarówno w grupie kontrolnej jak i badawczej zaobserwowano tendencję do wzrostu liczby osób w grupach o niższym wskaźniku Kwolka, a zmniejszeniu się liczebności grup o wyższym wskaźniku Kwolka. Wnioski. Kompleksowa rehabilitacja ma wpływ na poprawę rozkładu masy ciała.
Źródło:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna; 2017, 23, 1; 20-28
1234-5563
Pojawia się w:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu rehabilitacji na zaburzenia równowagi u pacjentów po niedokrwiennym udarze mózgu z wykorzystaniem wybranych testów i skal
Assessment of the effects of rehabilitation on balance impairment in patients after ischemic stroke according to selected tests and scales
Autorzy:
Jaworska, M.
Tuzim, T.
Starczyńska, M.
Wilk-Frańczuk, M.
Pedrycz, A.
Powiązania:
https://bibliotekanauki.pl/articles/1360163.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
zaburzenia równowagi
udar mózgu
usprawnianie fizjoterapeutyczne
testy czynnościowe
balance impairment
cebrebral stoke
psysiotherapeutic facilitation
functional test
Opis:
Udar mózgu jest jednym z najważniejszych problemów współczesnej medycyny. Pomimo podjętych wielu działań w celu zwiększenia świadomości, oraz znaczenia profilaktyki, choroba ta wciąż pozostaje jedną z głównych przyczyn powstawania niepełnosprawności. Celem pracy była ocena wpływu rodzaju terapii, wieku oraz okresu od zachorowania na postępy w rehabilitacji zaburzeń równowagi i stabilności ciała występujących w grupie badanych pacjentów w oparciu o wyniki uzyskane ze Skali Równowagi Berg’a (Berg Balance Scale), testu dwóch wag, wskaźnika symetryczności Kwolka oraz testu Timed Up and Go. Grupę badaną stanowiło 55 pacjentów po przebytym niedokrwiennym udarze mózgu. Wśród badanych było 29 kobiet (52,73%), oraz 26 mężczyzn (47,27%). Średnia wieku wszystkich badanych osób wynosiła 61,02 lat (przedział wieku 33-85 lat). Część pacjentów została poddana rehabilitacji przy pomocy klasycznej kinezyterapii, natomiast w drugiej grupie zastosowano rehabilitację opartą na metodzie proprioceptywnego torowania nerwowo – mięśniowego (PNF).
Cerebral stroke is one of the most important issues for modern medicine. Despite the fact that numerous activities have been undertaken for the purpose of raising awareness and significance of prevention, this condition still remains one of the main reasons behind disability. The objective of the work was to assess the effects of the type of therapy, age and period from the incident occurrence, on the progress of rehabilitation of imbalance and body stability observed in a group of researched patients, on the basis of results obtained according to the Berg Balance Scale, tandem balance test, Kwolek's loading symmetry index and Timed Up and Go test. The test group comprised of 55 post-stroke patients. The group consisted of 29 women (52.73%) and 26 men (47.27%). The average age of the subjects was 61.02 years (age range between 33-85 years). A number of the patients were subjected to rehabilitation with the use of classic kinesitherapy, whereas the remaining group underwent rehabilitation based on the proprioceptive neuromuscular facilitation method (PNF).
Źródło:
Polish Hyperbaric Research; 2015, 2(51); 55-66
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Profilaktyczna opieka nad dziećmi i młodzieżą w wieku szkolnym
Preventive Care for Children and School Children – Shaping Pro-Health Attitudes
Autorzy:
Gniadek, Lila
Mazurek, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/416737.pdf
Data publikacji:
2018-12
Wydawca:
Najwyższa Izba Kontroli
Tematy:
preventive health care
children
balance test
screening tests
vaccination
health education
Opis:
The Supreme Audit Office evaluated the healthcare system for children and school children, especially with regard to preventive care. The audit covered the years 2015–2017. It examined whether the current organisation of the healthcare system allowed for effective utilisation of the financial and human resources, and whether children and youngsters were provided with the required preventive and treatment services, and whether equal access to such services is ensured. NIK also audited whether the measures for improving the system were systematically implemented, as well as the activities aimed at satisfying both children and their parents or legal guardians.
Źródło:
Kontrola Państwowa; 2018, 63, 6 (383); 89-106
0452-5027
Pojawia się w:
Kontrola Państwowa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Purine metabolism in the light of aerobic and anaerobic capacity of female boxers
Autorzy:
Domaszewska, Katarzyna
Szewczyk, Piotr
Kryściak, Jakub
Michalak, Edyta
Podgórski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1030895.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Acid-Base Balance (ABB)
Wingate anaerobic test
anaerobic threshold (AT)
maximal oxygen uptake
purine nucleotides
uric acid
Opis:
The aim of the work was to assess the intensity of purine nucleotide degradation during maximum physical exercise. 5 elite female boxers were the subject of the study. Each of them underwent two exercise stress tests in order to evaluate the level of V̊O2peak and the level of anaerobic capacity during a Wingate test. The study involved collecting capillary and venous blood samples at rest and after the exercise test to determine the Acid-Base Balance (ABB), concentration of lactic acid (LA) and purine metabolism nucleotides. The average value of V̊O2peak was 40.92 (SD = 4.087) ml/kg/min, the average anaerobic capacity Ppeak was 7.57 (SD = 0.380) Watt/kg. The workload resulted in significant changes in the level of ABB and LA after both of the exercise stress tests (p < 0.001). Concentrations of hypoxanthine (Hx), xanthine (X) and uric acid (UA) in the blood increased significantly after the Wingate test (p < 0.05). The level of plasma purine nucleotides at rest and after standard exercise may be a useful tool for monitoring the adaptation of energetic processes in different training phases and support the overload diagnosis.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2020, 30, 2; 97-106
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality of balance and pressure distribution beneath the foot during double-leg stance in young women
Autorzy:
Korvas, Pavel
Powiązania:
https://bibliotekanauki.pl/articles/1921982.pdf
Data publikacji:
2019-04-17
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
balance
physical activity
pressure
test
young women
Opis:
One from the important preconditions for optimal performance of all physical activities is a good quality of balance. Aim of Study: The study is focusing to find out the effect of pressure distribution beneath the foot on the balance and to compare the quality of balance in physically active and inactive young women. Material and Methods: Subjects of our study were two groups of healthy young women. A: physically active women (n=28; age 21.5 years; physical activity 8.8 hour/week), B: physically inactive (n=28; age 22,0 years; physical activity 1.3 hour/week). Three balance test we carried out: double-leg stance, eyes open (EO) and closed (EC) for 30 second, one-leg stance (right, left) for 10 second. Pressure walkway (FDM system, fi. Zebris) was used for data collection. Parameters: COPv: velocity of centre of pressure (mm/s), relative value of average pressure beneath the foot (%). Results: We found out that a physically active group of young women have significantly better results in all tests (p≤0.05). Both groups showed a similar tendency for significant deterioration of the results when elimination the support surface or the visual sensor in relation to the basic OE test. The differences in the distribution of pressures between the groups were significant in the M-L directions. Inactive women significantly more loaded the non-preferred leg and the rear part of the foot. Active women showed a more balanced stance in both directions, with a slight tendency to increase the loading on the front part of foot. Conclusion: It was confirmed that the group B has a partly worse characteristics of balance than physically active peers. The foot load strategy was less favourable for the group B; during EO. Only two interesting correlations were found in active women; between COPv and ratio of feet load. Remaining correlations to COPv were low.
Źródło:
Physical Activity Review; 2019, 7; 71-79
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Split-plot x split-block analysis with control A treatments
Analiza typu split-plot x split-block z obiektami kontrolnymi w obrębie czynnika A
Autorzy:
Ambrozy, K.
Kachlicka, D.
Mejza, I.
Powiązania:
https://bibliotekanauki.pl/articles/9689.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
Tematy:
split-plot x split-block analysis
control treatment
efficiency balance
split-plot x split-block design
test treatment
Źródło:
Colloquium Biometricum; 2008, 38
1896-7701
Pojawia się w:
Colloquium Biometricum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of the relationships between body posture indices and the Y-Balance Test results in the adolescents
Autorzy:
Walaszek, R.
Chwała, W.
Walaszek, K.
Burdacki, M.
Powiązania:
https://bibliotekanauki.pl/articles/306499.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
postawa ciała
metoda fotogrametryczna
stabilność postawy
test
równowaga
body posture
photogrammetric method
postural stability
Y-Balance Test
Opis:
The purpose of this work was to assess the differences of the values of body posture indices, measured with the Moire’s method, between girls and boys aged 13 and the relationships of these values with the results of the Y-Balance Test. Methods: The study involved a group of healthy volunteers attending junior high schools in Cracow. The group consisted of 20 girls and 35 boys. Basic somatic parameters were measured within this work: body height and weight. Body posture was assessed according to the general methodology of the Moire’s technique and 14 body posture indices were obtained as a result: 6 in the sagittal plane, 1 in the axial plane and 7 in the coronal plane. Postural stability was assessed with the Y-Balance Test (YBT). Results: The studied girls and boys had practically the same body posture – statistical differences were found only in 3 out of 14 assessed indices measured with the Moire’s technique. Scoliosis was found in as many as 51% of the subjects, however, mean values of deviations from the C7-S1 line were not large. Conclusions: In the group of girls, the set of blades (below – above) was statistically significantly correlated with the global YBT result for the right inferior extremity, and in the group of boys – the set of the waist triangles (below – above) was statistically significantly correlated with the global YBT results for the right and left inferior extremities.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 2; 149-157
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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