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Tytuł:
Association of hand grip strength with psychological stress, exercise habits and body composition amongst medical students: a cross-sectional study
Autorzy:
Barre, Samira
Inyingi, Laura
Orrego Castellanos, Julianna
Patel, Agastya
Ruckemann-Dziurdzinska, Katarzyna A.
Bryl, Ewa D.
Witkowski, Jacek M.
Powiązania:
https://bibliotekanauki.pl/articles/33897312.pdf
Data publikacji:
2024-06-18
Wydawca:
Gdański Uniwersytet Medyczny
Tematy:
exercise
psychological stress
medical students
Hand grip strength
Opis:
Background The aim of this study was to assess the effectiveness of hand grip strength (HGS) test in identifying highly stressed individuals and to examine the effect of exercise and lifestyle on HGS and stress measures. Material and methods It is cross-sectional study. Students of the Medical University of Gdańsk, Poland were asked to fill out a questionnaire, undergo body composition analysis, perform HGS test and provide a saliva sample for cortisol measurement. Results Self-rated stress (SRS) was significantly higher in pre-clinical years (PCY) compared to clinical years (CY). HGS was significantly lower in PCY males than CY males. Participants who performed some form of exercise had significantly higher HGS compared with those who did not exercise. A positive correlation between HGS and BMI was noted. Students with low HGS were found to have lower levels of salivary cortisol (SC). However, there was no significant difference in SC levels between PCY and CY students. Conclusions HGS may be a reliable method of identifying stressed individuals and promoting healthy lifestyle behaviors. HGS testing is a safe, cheap and easy to perform method for a large number of participants while being time economical.
Źródło:
European Journal of Translational and Clinical Medicine; 2024, 7, 1; 33-46
2657-3148
2657-3156
Pojawia się w:
European Journal of Translational and Clinical Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Influence of Reinforcement Volume on AA5083/(SiC-Gr) Hybrid Surface Composite Developed by Friction Stir Processing
Autorzy:
Bharti, Shalok
Ghetiya, Nilesh D.
Patel, Kaushik M.
Saxena, Kuldeep K.
Powiązania:
https://bibliotekanauki.pl/articles/27765096.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
surface composites
multi-pass
Friction Stir Processing
reinforcement
hybrid composite
Opis:
In this study, a hybrid surface composite of AA5083/SiC-Gr was produced by Friction Stir Processing (FSP). Reinforcement material each in 50:50 proportion was filled in the base matrix using holes method. Three different hybrid reinforcement volumes of 301.6 mm3, 452.4 mm3, and 603.2 mm3 were prepared for surface composite. Optical and Scanning Electron Microscopy was used to check the quality of the prepared surface composite and homogeneous distribution of reinforcement was observed in the images. It was observed that due to better uniform distribution of reinforcement particles during 3 pass FSP, specimens with 301.6 mm3 reinforcement volume showed enhanced microhardness and wear properties in comparison with the other specimens.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 625--629
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Optimization of Phenol Formaldehyde Resin Sand Mould System
Autorzy:
Chate, G. R.
Patel, M. G. C.
Parappagoudar, M. B.
Deshpande, A. S.
Powiązania:
https://bibliotekanauki.pl/articles/381857.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mould hardness
phenol-formaldehyde resin
permeability
desirability function approach
design of experiments
masy formierskie
żywica fenolowo-formaldehydowa
przepuszczalność
twardość
optymalizacja
Opis:
Chemical bonded resin sand mould system has high dimensional accuracy, surface finish and sand mould properties compared to green sand mould system. The mould cavity prepared under chemical bonded sand mould system must produce sufficient permeability and hardness to withstand sand drop while pouring molten metal through ladle. The demand for improved values of permeability and mould hardness depends on systematic study and analysis of influencing variables namely grain fineness number, setting time, percent of resin and hardener. Try-error experiment methods and analysis were considered impractical in actual foundry practice due to the associated cost. Experimental matrices of central composite design allow conducting minimum experiments that provide complete insight of the process. Statistical significance of influencing variables and their interaction were determined to control the process. Analysis of variance (ANOVA) test was conducted to validate the model statistically. Mathematical equation was derived separately for mould hardness and permeability, which are expressed as a non-linear function of input variables based on the collected experimental input-output data. The developed model prediction accuracy for practical usefulness was tested with 10 random experimental conditions. The decision variables for higher mould hardness and permeability were determined using desirability function approach. The prediction results were found to be consistent with experimental values.
Źródło:
Archives of Foundry Engineering; 2017, 17, 2; 162-170
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extraction protocol for isolation of CNSL by using protic and aprotic solvents from cashew nut and study of their physico-chemical parameter
Autorzy:
Gandhi, T. S.
Dholakiya, B. Z.
Patel, M. R.
Powiązania:
https://bibliotekanauki.pl/articles/778109.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Cashew nut shell
Cashew nut shell liquid
Cardanol
Soxhlet apparatus
Opis:
Cashew nut shell liquid (CNSL) represents the largest readily available bioresource of alkenyl phenolic compounds. (CNSL) and its derivatives are widely used in polymer-based industries, synthesis of chemicals and intermediates, including bactericides, insecticides and surface active agents. In this work extraction of cashew nut shell liquid from cashew nut shell (CNS) was carried out by using the Soxhlet extraction method in the presence of polar & non-polar solvents. From the extracted CNSL, anacardic acid was selectively isolated and acid free CNSL was treated with liquor ammonia to separate the cardanol and cardol in the stepwise manner. Comparative study for the extracted CNSL and S-was performed. Higher amount of extracted CNSL was obtained from polar solvents. They were all characterized using quantitative analysis by HPLC.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 4; 24-27
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microgrid-based cryogenic energy storage as a part of Intelligent Energy Infrastructure Management (IEIM)
Autorzy:
Głowacki, B.A.
Tomov, R.
Woźniak, M.
Patel, A.
Pałka, R.
Powiązania:
https://bibliotekanauki.pl/articles/1372731.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
maszyna elektryczna
energia odnawialna
zarządzanie energią
electric machine
renewable energy
energy management
Opis:
Integration of advanced electrical machines with electrical power systems and renewable energy is at the heart of the dedicated Liquid Hydrogen Laboratory (LHL) at the University of Cambridge. Generation, storage and use of the hydrogen in conjunction with a patented dynamic energy storage system are an integral part of the proposed combined heat and power (CHP) IEIM Project. The aim of the project is to address intelligent energy infrastructure management IEIM of a smart micro grid, which combines hydrogen and electricity. To build a powerful relational database for the entire physical infrastructure based on combined heat and power elements, a sub-system needs to be established to monitor the status of interconnectivity to the grid. This information will be mapped onto the database to provide a real-time view of the energy network's physical interconnectivity with the grid, significantly reducing the environmental impact of the total electricity supply system. Considering the nature of the heat and power elements fibre optic based sensing techniques will remotely monitor the patching fields and provide an accurate map of the connectivity and constantly monitor changes in real-time.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2011, 4, 92; 13-16
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nickelization Effect on the High Temperature Tensile Properties of Mg-0.7Y2O3 Nanocomposite
Autorzy:
Hassan, S. F.
Tun, K. S.
Patel, F.
Al-Aqeeli, N.
Gupta, M.
Powiązania:
https://bibliotekanauki.pl/articles/357046.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium
nanocomposite
high-temperature
tensile strength
deformation
Opis:
In this study, high performance magnesium-yttria nanocomposite’s room temperature, strength and ductility were significantly enhanced by the dispersion of nano-sized nickel particles using powder blending and a microwave sintering process. The strengthening effect of the dispersed nano-sized nickel particles was consistent up to 100°C and then it gradually diminished with further increases in the test temperature. The ductility of the magnesium-yttria nanocomposite remained unaffected by the dispersed nano-sized nickel particles up to 100°C. Impressively, it was enhanced at 150°C and above, leading to the possibility of the near net shape fabrication of the nanocomposite at a significantly low temperature.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1411-1415
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recurrent upper gastrointestinal bleed in a 26 year old female
Autorzy:
Heavener, T.
Patel, P.
Garner, J.
Sing, J.
Jeffries, M.
Thomas, H.J.
Powiązania:
https://bibliotekanauki.pl/articles/1918636.pdf
Data publikacji:
2018-06-21
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Anemia
coil migration
endoscopy
Opis:
According to recent society guidelines, upper gastrointestinal bleed initial approach includes assessment of hemodynamic status, fluid resuscitation if necessary, transfusion strategy to target hemoglobin above 7 (g/dL), use of intravenous proton pump inhibitor and generally upper endoscopy within 24 hours. We present a case of a 26-year-old woman who sought treatment after one episode of hematemesis and pre-syncope. She had a similar presentation three months earlier and received interventional radiology-guided mesenteric angiography and the use of multiple coils to embolize a 1.5-cm deep punched-out duodenal ulcer. Migration of the coil was noted on endoscopy within the previously described ulcer. Coil migration is expected to occur in up to 3% of cases of endovascular embolization. However, migration into the duodenum is uncommon and could have actually been a contributing factor to the current bleed.
Źródło:
Progress in Health Sciences; 2018, 8(1); 231-233
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmentally and Economically Feasibility Manufacturing Process of Potassium Nitrate for Small Scale Industries: A Review
Autorzy:
Joshi, C. S.
Shukla, M. R.
Patel, K.
Joshi, J. S.
Sahu, O.
Powiązania:
https://bibliotekanauki.pl/articles/411997.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Chemical
discharge
ions
Salts
Waste
Opis:
Potassium Nitrate (PN) is of the basic need of chemical industry. With increase of demand in different production section of fertilizer, pharmaceutical, explosive, food industry etc, potassium nitrate the production becoming non economical to industry. The operating conditions and parameters are the main factors, which responsible for maximised the profits. The main aim of this study is to compared the production potassium nitrate in profitable as well as environmentally suitability way. From the literature different manufacturing process has been summarized for concluding this study.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2015, 41; 88-99
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Vibration Analysis of A357 Alloy Reinforced with Dual Particle Size Silicon Carbide Metal Matrix Composite Plates Using Finite Element Method
Autorzy:
Lakshmikanthan, A.
Mahesh, V.
Prabhu, R. T.
Patel, M. G. C.
Bontha, S.
Powiązania:
https://bibliotekanauki.pl/articles/1837831.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
finite element method
shear deformation theory
FSDT
A357 alloy
Hamilton’s principle
A357/DPS-SiC
composites
metoda elementów skończonych
teoria odkształceń
stop A357
zasada Hamiltona
kompozyty
Opis:
In this work, the free vibration behaviour of A357 composite plate reinforced with dual particle size (DPS) (3 wt.% coarse + 3 wt.% fine, 4 wt.% coarse + 2 wt.% fine, and 2 wt.% coarse + 4 wt.% fine) SiC is evaluated using the finite element method. To this end, first-order shear deformation theory (FSDT) has been used. The equations of motion have been derived using Hamilton’s principle and the solution has been obtained through condensation technique. A thorough parametric study was conducted to understand the effect of reinforcement size and weight fraction, boundary conditions, aspect ratio and length-to-width ratio of plate geometry on natural frequencies of A357/DPS-SiC composite plates. Results reveal significant influence of all the above variables on natural frequency of the composite plates. In all the cases, A357 composite plate reinforced with 4 wt.% coarse and 2 wt.% fine SiC particles displayed the highest natural frequency owing to its higher elastic and rigidity modulus. Further, the natural frequencies increase with decrease in aspect ratio of the plate geometry. Natural frequency also decreases with increase in the number of free edges. Lastly, increasing the length-to-width ratio drastically improves the natural frequency of the plates.
Źródło:
Archives of Foundry Engineering; 2021, 21, 1; 101-112
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in reflectance anisotropy of wheat crop during different phenophases
Autorzy:
M. Lunagaria, Manoj
R. Patel, Haridas
Powiązania:
https://bibliotekanauki.pl/articles/972709.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
brdf
reflectance anisotropy
wheat
spectrodirectional measurement
goniometer
Opis:
The canopy structure of wheat changes significantly with growth stages and leads to changes in reflectance anisotropy. Bidirectional reflectance distribution function characterises the reflectance anisotropy of the targets, which can be approximated. Spectrodirectional reflectance measurements on wheat crop were acquired using a field goniometer system. The bidirectional reflectance spectra were acquired at 54 view angles to cover the hemispheric span up to 60° view zenith. The observations were made during early growth stages till maturity of the crop. The anisotropy was not constant for all wavelengths and anisotropic factors clearly revealed spectral dependence, which was more pronounced in near principal plane. In near infrared, wheat canopy expressed less reflectance anisotropy because of higher multiple scattering. The broad hotspot signature was noticeable in reflectance of canopy whenever view and solar angles were close. Distinct changes in bidirectional reflectance distribution function were observed during booting to flowering stages as the canopy achieves more uniformity, height and head emergence. The function clearly reveals bowl shape during heading to early milking growth stages of the crop. Late growth stages show less prominent gap and shadow effects. Anisotropy index revealed that wheat exhibits changes in reflectance anisotropy with phenological development and with spectral bands.
Źródło:
International Agrophysics; 2017, 31, 2; 203-218
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modelling of Shliomis model based ferrofluid lubrication performance in rough short bearing
Autorzy:
Munshi, Mohmmadraiyan M.
Patel, Ashok R.
Deheri, Gunamani
Powiązania:
https://bibliotekanauki.pl/articles/279287.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
ferrofluid
roughness
load carrying capacity
Opis:
This paper has attempted to scrutinize the bearing performance of a rough short bearing assisted by a ferrofluid with the help of numerical modelling of the Shliomis model. The transverse roughness is calculated stochastically by averaging the Christensen and Tonder models. A non-zero mean is assumed for the probability density function for the random variable that determines the roughness of the bearing which is symmetrical. This attempt is made to create a more pragmatic and applicable situation. Expressions that can signify a dimensionless form of pressure and bearing load carrying capacity are found using Reynolds’ equation. The load carrying capacity equation is then solved numerically with the help of Simpson’s 1/3 rule to analyze the impact on the bearing system. From the graphical representation, it can be concluded that ferrofluid lubrication based on the Shliomis model can significantly neutralize the negative effects of the bearing roughness on its load carrying capacity.
Źródło:
Journal of Theoretical and Applied Mechanics; 2019, 57, 4; 923-934
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two Step One-Pot Synthesis of Novel 5-(4-Fluorophenyl)-1H-Beno[e][1,4]Diazepin-2(3H)-One and it’s Base Catalyzed Transformation to N-Alkyl and C-3 Arylidene Derivatives
Autorzy:
Patel, Anil S.
Khunt, H. R.
Ghelani, S. M.
Babariya, J. S.
Vilapara, K. V.
Naliapara, Y. T.
Powiązania:
https://bibliotekanauki.pl/articles/412124.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
benzodiazepines
base catalyzed
cross-aldol
Opis:
We have demonstrated two step one-pot synthesis of novel 5-(4-Fluorophenyl)-1H-Beno[e][1,4]Diazepin-2(3H)-one using 2-Amino-4’-fluorobenzophenone as initial stating material. The small library of N-alkylation and C-3 benzylidene derivatives have been synthesized by base catalyzedreaction of 5-(4-fluorophenyl)-1H-benzo[e][1,4]diazepin-2(3H)-one (3) nucleus with various alkyl halides and aromatic aldehydes respectively.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 106-115
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Objective Optimization of Squeeze Casting Process using Genetic Algorithm and Particle Swarm Optimization
Autorzy:
Patel, G. C. M.
Krishna, P.
Vundavilli, P. R.
Parappagoudar, M. B.
Powiązania:
https://bibliotekanauki.pl/articles/379601.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
squeeze casting process
multi-objective optimization
genetic algorithm
squeeze casting
prasowanie stopu
optymalizacja wielokryterialna
algorytm genetyczny
Opis:
The near net shaped manufacturing ability of squeeze casting process requiresto set the process variable combinations at their optimal levels to obtain both aesthetic appearance and internal soundness of the cast parts. The aesthetic and internal soundness of cast parts deal with surface roughness and tensile strength those can readily put the part in service without the requirement of costly secondary manufacturing processes (like polishing, shot blasting, plating, hear treatment etc.). It is difficult to determine the levels of the process variable (that is, pressure duration, squeeze pressure, pouring temperature and die temperature) combinations for extreme values of the responses (that is, surface roughness, yield strength and ultimate tensile strength) due to conflicting requirements. In the present manuscript, three population based search and optimization methods, namely genetic algorithm (GA), particle swarm optimization (PSO) and multi-objective particle swarm optimization based on crowding distance (MOPSO-CD) methods have been used to optimize multiple outputs simultaneously. Further, validation test has been conducted for the optimal casting conditions suggested by GA, PSO and MOPSO-CD. The results showed that PSO outperformed GA with regard to computation time.
Źródło:
Archives of Foundry Engineering; 2016, 16, 3; 172-186
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 24

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