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    Wyświetlanie 1-6 z 6
    Tytuł:
    Multi-objective optimization of PCM-fin structure for staggered Li-ion battery packs
    Autorzy:
    Qiu, Chenghui
    Wu, Chongtian
    Yuan, Xiaolu
    Wu, Linxu
    Yang, Jiaming
    Shi, Hong
    Powiązania:
    https://bibliotekanauki.pl/articles/27311457.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    staggered arrangement
    phase change material
    fin
    multi-objective optimization
    thermal management
    entropy weight
    TOPSIS method
    technique for order of preference by similarity to ideal solution
    układ naprzemienny
    materiał o przemianie fazowej
    materiał zmieniający fazę
    płetwa
    optymalizacja wielocelowa
    optymalizacja wieloobiektowa
    zarządzanie ciepłem
    entropia wagi
    metoda TOPSIS
    technika porządkowania preferencji według podobieństwa do idealnego rozwiązania
    Opis:
    Endurance capability is a key indicator to evaluate the performance of electric vehicles. Improving the energy density of battery packs in a limited space while ensuring the safety of the vehicle is one of the currently used technological solutions. Accordingly, a small space and high energy density battery arrangement scheme is proposed in this paper. The comprehensive performance of two battery packs based on the same volume and different space arrangements is compared. Further, based on the same thermal management system (PCM-fin system), the thermal performance of staggered battery packs with high energy density is numerically simulated with different fin structures, and the optimal fin structure parameters for staggered battery packs at a 3C discharge rate are determined using the entropy weight-TOPSIS method. The result reveals that increasing the contact thickness between the fin and the battery (X) can reduce the maximum temperature, but weaken temperature homogeneity. Moreover, the change of fin width (A) has no significant effect on the heat dissipation performance of the battery pack. Entropy weight-TOPSIS method objectively assigns weights to both maximum temperature (Tmax) and temperature difference (DT) and determines the optimal solution for the cooling system fin parameters. It is found that when X = 0:67 mm, A = 0:6 mm, the staggered battery pack holds the best comprehensive performance.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 4; art. no. e145677
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of the training program to improve healthy nutrition and physical activity behaviors of school children on weight management
    Autorzy:
    Emlek Sert, Z.
    Bayık Temel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918947.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Adolescent
    nutrition
    physical activity
    weight management
    school health
    Opis:
    Purpose: To investigate the effects of the training program to improve healthy nutrition and physical activity behaviors of primary school children on weight management. Materials and methods: This study was a quasi-experimental follow up study with pretest and posttest design and included the 5th, 6th and 7th primary school graders (n=122) in İzmir metropolitan city. Experimental group covered 66 and the control group covered 56 students. We identified students’ dietary habits and physical activity behaviors and the influencing factors and prepared and implemented a training program related to their learning needs. Students’ behaviors were monitored for six months and impact of the program was evaluated. Results: Risky eating behaviours in the experimental group decreased but contrary it increased in the control group statistically (p <.05). In the intervention group, mean scores of Physical Activity Questionnaire increased significantly (p <.05). There was no change in the self-efficacy level of the control group students while an increase in the intervention group was detected. Although no statistically significant differences were detected between the two groups in the pretest in terms of weight management, but in the post test it increased in the experimental group (p<.05) The obtained value of OR was 2.99. Conclusions: The training program was effective and made changes in healthy nutrition and physical activity behaviors and so in weight management in the experimental group compared to control group.
    Źródło:
    Progress in Health Sciences; 2020, 10(2); 29-38
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Exercise on Appetite-Regulating Hormones, Perceived Hunger, and Energy Intake: A Narrative Overview
    Autorzy:
    Gleason, Marsa
    Aboul-Enein, Basil H.
    Bernstein, Josh
    Kruk, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/1030532.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    Appetite regulation
    Exercise
    Hunger
    Weight management
    Opis:
    Controlling appetite, perceived hunger, and energy intake are important factors in weight management. This narrative review examines the effect of different forms, intensities and duration of exercise on the appetite-regulating hormones leptin, acylated ghrelin, glucagon like peptide-1 (GLP-1) and peptide tyrosine tyrosine3-36 (PYY3-36), perceptions of hunger, and energy intake in overweight/obese, and normal weight populations. The studies reviewed compared exercise intensities- low, moderate, and high intensity, and modes of exercise- aerobic and resistance training. The studies selected in this narrative review included participants that ranged in age from 13-57 years old, male and female, previously sedentary and physically active, and normal weight and overweight/obese individuals- defined by body mass index standards (BMI). The primary benefits of exercise on appetite regulation are seen with moderate to high-intensity aerobic exercise; with the most notable relative energy deficit resulting from an exercise bout (at any intensity) that expends the most energy. Further research is warranted to determine if there exists a tendency to overcompensate for energy expended during exercise in certain populations.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2018, 22, 2; 5-12
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fitting room and silence body weight
    Autorzy:
    Habibzadeh, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1917279.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    fitting room
    body image
    Health
    Weight Management
    Opis:
    The impact of obesity on health, social care and the economy has long been established. Being obese or overweight increases the risk of developing a range of serious diseases including psychological disturbance, diabetes, heart disease, musculoskeletal disorders such as osteoarthritis and cancers that lead to premature disability and mortality. The good news is that overweight and obesity are largely prevent and /or control-able through losing weight strategies and fitting room can be an option for whom are observant about their surroundings. The fitting room is usually where the consumer makes their final evaluation about the products while assessing personal appearance, and finally deciding whether or not to purchase the garment. For some people, fitting room it is something to get through without visible or psychic damage and for some others is a horrifying place as they may suddenly realize how overweight or obese they are that could be a challenging start to maintain a healthy body image in a life-changing journey. In fact, the changing room is inspired to provide some people with personal choices toward a desirable weight therapy through engaging in exercise and diet. Hence, fitting room while in shopping even for entertainment purposes is advised as a beneficial life - time decision in weight control and obesity may take place by individual in this way.
    Źródło:
    Progress in Health Sciences; 2015, 5, 1; 276-278
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economic Development And Transfrontier Shipments Of Waste In Poland – Spatio-Temporal Analysis
    Autorzy:
    Antczak, Elżbieta
    Powiązania:
    https://bibliotekanauki.pl/articles/633163.pdf
    Data publikacji:
    2014-12-01
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    spatial panel data models
    Environmental Kuznets Curve
    sustainable development
    waste management
    spatial weight matrices
    Opis:
    The aim of the paper is to apply the spatio-temporal Environmental Kuznets Curve (SpEKC) to test the relationship between economic growth and the amount of collected mixed municipal waste. The analysis was conducted at the level of sixty-six Polish sub-regions. The study contained selected environmental indicators. The dependent variable - the amount of municipal waste generated in kilograms per capita characterized the state of the environment. The GDP per capita in constant prices (as an explanatory variable) presented the level of economic development of the sub-regions. In the empirical part of the research there were used spatial panel data models based on EKCs. It determined the levels of economic development, at which the amount of produced wastes has fallen or increased, depending on the wealth of the region. The application of different types of spatial weight matrices was an important element of this modelling. Data obtained the years 2005-2012. Models were estimated in the RCran package.
    Źródło:
    Comparative Economic Research. Central and Eastern Europe; 2014, 17, 4; 5-21
    1508-2008
    2082-6737
    Pojawia się w:
    Comparative Economic Research. Central and Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regeneracja mechaniczna i mechaniczno-termiczna zużytej masy rdzeniowej z procesu cold-box
    Mechanical and Thermo-mechanical Reclamation of Used Cold-box Sand
    Autorzy:
    Dańko, R.
    Łucarz, M.
    Dańko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380098.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    zagospodarowanie odpadów
    recykling osnowy
    masa zużyta
    masa rdzeniowa
    regeneracja kombinowana
    proces cold-box
    waste management
    recycling warp
    mass consumed
    weight core
    regeneration combined
    cold-box process
    Opis:
    W artykule przedstawiono wyniki badań regeneracji zużytej masy rdzeniowej pochodzącej z procesu cold-box. Badaniom poddano masy zużyte składające się głównie z niedopuszczonych do produkcji uszkodzonych rdzeni. Rdzenie te, nie podlegały destrukcji termicznej w formie, stąd ich dalsza obróbka mająca na celu odzyskanie osnowy kwarcowej wymagała zastosowania specjalnych technik pozwalających na efektywne oczyszczenie ziaren piasku z otoczki zużytego materiału wiążącego. W tym celu stosowano kombinację regeneracji mechanicznej o narastającym czasie obróbki w połączeniu z regeneracją termiczną. Odzyskane regeneraty były następnie poddane badaniom mającym na celu określenie ich stopnia oczyszczenia. Spośród znanych metod oceny instrumentalnej regeneratu w badaniach określano wartości: straty prażenia, odczynu pH, składu ziarnowego (analiza sitowa). Jako sprawdzian jakości regeneratu zastosowano badanie wytrzymałości na zginanie mas rdzeniowych sporządzonych na zregenerowanej osnowie.
    The paper presents the results of the regeneration of the spent core sand from cold-box process. The study concerned the reclamation treatment of foundry cores which was not allowed to production process due to their not permissible defects. These cores as a compacted core sand which not been subjected to thermal destruction in the mould had fully preserved their previous characteristic eg. strength, shape and volume hardening. In this case regeneration aimed at recovering the quartz matrix requires the use of special techniques to clean the grains of sand from the used binding material. To solve this problem the special preparing of used cores were applied ensuring the proper grain size composition subjected to dedusting prior to reclamation treatment. Both the mechanical and mechanical-thermal methods of regeneration were tested during research. The recovered the quartz matrix was evalutated by following of well known instrumental tests: loss on ignition, pH value, sieve analysis, dust content. Furthermore reclaim was used to prepare core sand and to perform test bending strength tests.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4 spec.; 21-24
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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