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    Wyświetlanie 1-11 z 11
    Tytuł:
    Physical separation route for printed circuit boards
    Autorzy:
    Burat, F.
    Özer, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/109975.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    physical methods
    PCBs
    environment
    copper
    gold
    silver
    Opis:
    Recently, the consumption of electrical and electronic equipment (EEE) has increased with the advanced technology. A wide range of components made of metals, plastics and other substances are contained in EEE. Electronic waste (e-waste) is easily demounted and separated by manually methods; however, printed circuit board (PCB) which is one the most common components of e-waste need to be recycled with economic and environmental technologies. In this paper, employing physical separation methods to ground waste PCB, an eco-friendly, simple and environmental process for separation of valuable metals was designed and proposed. A heavy fraction with 40.8% Cu, 350 ppm Au and 475 ppm Ag content at recovery of 95.4% Cu, 77.7% Au and 65.1% Ag was obtained from a feed assaying 12% Cu, 130 ppm Au and 200 ppm Ag using shaking table separator. Cu grade was increased from 52.4% to 73.9% with the recovery over 92% by dry magnetic separator and copper alloys were separated from the waste matrix with 98% Cu recovery using electrostatic separator.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 554-566
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The stabilometric evaluation of the impact of neurophysiological physical methods on balance improvement in patients after a stroke
    Ocena stabilometryczna wpływu fizykalnych metod neurofizjologicznych na poprawę równowagi u chorych po udarze mózgu
    Autorzy:
    Krukowska, Jolanta
    Czernicki, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/1963112.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie
    Tematy:
    Stroke
    body balance
    neurophysiological physical methods
    udar mózgu
    równowaga ciała
    fizykalne metody neurofizjologiczne
    Opis:
    Introduction: Postural instability and difficulty in maintaining an upright position in patients after a stroke are connected with an impaired schema of the body. As a result, patients are not able to cope with daily activities. NDT-Bobath and PNF methods are commonly used in physiotherapy nowadays. The study aimed at an evaluation of the usefulness of a stabilometric platform in measuring stability and body balance in a standing position as well as the assessment of the impact of the above methods on the improvement of balance in patients after a stroke.Material and methods: Sixty-two patients after an ischemic stroke were included in the study. The patients were randomized to two therapy groups: NDT-Bobath and PNF. To assess the stability of posture and body balance in static conditions (measuring the field of support and COP path length) an ALFA stabilometric platform was used. Results: Before the therapy was conducted a longer COP path and a larger field of support in patients with left-sided paresis were observed, which confirms the increased instability of the body and impaired balance. After the therapy the researchers observed a shorter COP path in patients with right-sided paresis (in both the groups) while there was no such trend in relation to the field of support. After the therapy patients for whom the NDT-Bobath method had been used demonstrated a significantly greater reduction of the COP path and reduction in the area of support.Conclusion: Increased postural instability and impairment of body balance occurred in stroke patients with left-sided paresis. In the physiotherapy of post-stroke patients NDT-Bobath and PNF methods have important therapeutic properties. A significantly greater reduction of the COP path and a large reduction in the area of support were observed in patients treated with the NDT-Bobath method.
    Wstęp: Niestabilność posturalna i trudności w utrzymaniu pionowej postawy u osób po udarze mózgu mogą być związane z zaburzeniem schematu ciała (tzw. nieuwagą połowiczą). W konsekwencji chorzy nie mogą swobodnie funkcjonować w Ŝyciu codziennym. Obecnie w fizjoterapii najczęściej stosowane są metody neurofizjologiczne jak: metoda NDT-Bobath i PNF. Celem pracy była ocena przydatności platformy stabilometrycznej do pomiaru stabilności i równowagi ciała w pozycji stojącej oraz wpływu w/w metod na równowagę u chorych po udarze mózgu. Materiał i metody: Badania przeprowadzono u 62 chorych po udarze niedokrwiennym mózgu. Chorych losowo przydzielono do dwóch grup terapii: NDT-Bobath i PNF. Do oceny stabilności postawy i równowagi ciała w warunkach statycznych (pomiar powierzchni pola podparcia i długości drogi COP) wykorzystano platformę stabilometryczną ALFA. Wyniki: Przed rozpoczęciem terapii obserwowano dłuższą drogę COP i większe pole podparcia u chorych z niedowładem lewostronnym, co potwierdza większą niestabilność ciała i zaburzenia równowagi w tej grupie chorych. Po terapii większe wartości skrócenia drogi przemieszczania się COP występowało u chorych z niedowładem prawostronnym (w obu grupach), a w przypadku wielkości pola podparcia nie obserwowano takiej tendencji. Po terapii stwierdzono istotnie większe skrócenie drogi COP i zmniejszenie pola powierzchni podparcia u chorych, u których stosowano metodę NDT-Bobath. Wnioski: U chorych po udarze mózgu większe zaburzenia stabilności postawy i równowagi ciała występują u osób z niedowładem lewostronnym. W fizjoterapii chorych po udarze mózgu metody NDT-Bobath i PNF wykazują działania terapeutyczne. Istotnie większe skrócenie drogi COP i większe zmniejszenie pola powierzchni podparcia obserwowano u chorych leczonych metodą NDT-Bobath.
    Źródło:
    Medical Rehabilitation; 2012, 16(2); 16-21
    1427-9622
    1896-3250
    Pojawia się w:
    Medical Rehabilitation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An assessment of the effectiveness of physical curing methods of molding sand bonded by binders based on starch and aluminosilicates
    Ocena efektywności metod fizycznego utwardzania masy formierskiej wiązanej spoiwem skrobiowo-glinokrzemianowym
    Autorzy:
    Kaczmarska, K.
    Grabowska, B.
    Drożyński, D.
    Kurleto, Ż.
    Szymański, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/264104.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    molding sands
    physical methods of curing
    drying
    microwaves
    starch binder
    masy formierskie
    utwardzanie fizyczne
    suszenie
    mikrofale
    spoiwo skrobiowe
    Opis:
    In this study, the effectiveness of curing methods by conventional heating and innovative microwave curing were compared, based on the results of determining molding sand selected properties such as permeability, tensile strength, and wear resistance. The tested molding sand used for our research was a composition of silica sand with a commercial binder in the form of Albertine F/1 (Hüttenes Albertus). This binder is a mixture of water-swellable starch derivatives and aluminosilicates. Binding in the molding sand occurred via solvent evaporation from the samples (water).The obtained results showed a dependence of molding sand properties and selected methods of physical cure, especially after one and four hours of cured-sample storage. However, after 24 hours of sample storage (as apparent from the analysis of the obtained results), both curing methods used were almost equally effective, and marked differences in the molding sand properties were located in the range of measurement uncertainty. Using electromagnetic waves in the microwave range made it possible to significantly reduce the time of curing as well as the energy consumption of the drying process.
    W niniejszej pracy na podstawie wybranych właściwości (przepuszczalności, ścieralności i wytrzymałości na rozciąganie w stanie utwardzonym) porównano efektywność metod utwardzania przez konwencjonalne nagrzewanie oraz innowacyjnej metody utwardzania mikrofalowego mas formierskich z komercyjnym spoiwem skrobiowym w postaci produktu Albertine F/1 (Hüttenes Albertus). Spoiwo to stanowi mieszaninę pochodnych skrobi z glinokrzemianami pęczniejącą w kontakcie z wodą. Wiązanie w masie zachodzi w wyniku odparowania wody rozpuszczalnikowej. Na podstawie uzyskanych wyników stwierdzono wyraźną zależność właściwości mas formierskich od doboru metody fizycznego utwardzania, szczególnie po jednej i czterech godzinach składowania kształtek. Natomiast po 24 h składowania kształtek, jak wynikało z analizy uzyskanych wyników, obie zastosowane metody utwardzania są niemal tak samo skuteczne, a różnice wartości oznaczonych właściwości mas mieściły się w granicy niepewności pomiaru. Dzięki zastosowaniu fal elektromagnetycznych w zakresie mikrofal możliwe było wyraźne skrócenie czasu utwardzania i zredukowanie zapotrzebowania na energię procesu suszenia form.
    Źródło:
    Metallurgy and Foundry Engineering; 2015, 41, 3; 133-141
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of pain in athletes – selected methods
    Autorzy:
    Leźnicka, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1054971.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    athletes
    measurement methods
    pain
    physical effort
    Opis:
    It is generally believed that athletes experience pain in a different way than normally active individuals. Many scientists have confirmed the hypothesis that long-term physical activity can alter the perception of pain, i.e. athletes have a higher pain sensation and pain tolerance thresholds. The measurement of pain intensity is carried out using subjective methods based on verbal and non-verbal information, describing the clinical characteristics of pain. These psychological methods include the use of scales and questionnaires. Objective methods (thermal, mechanical and electrical) are used only to determine the pain sensation and pain tolerance thresholds. The specificity and prevalence of chronic pain syndromes have resulted in the increased number of studies on healthy and physically active individuals. It seems that determination of the effects of exercise on the perception of pain might help in the understanding of mechanisms of pain generation.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2013, 3, 3; 27-30
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prospects fixation drift sands physicochemical method
    Перспективы закрепления подвижных песков физико-химическим методом
    Autorzy:
    Muzaffarova, M.
    Mirakhmedov, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/374039.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    sandy desert
    railway
    drifts
    physical and chemical methods
    technological gap
    resource
    pustynia piaszczysta
    kolej
    prądy
    metody fizyczne i chemiczne
    luka technologiczna
    źródła
    Opis:
    This article is based on the theoretical foundations of secure mobile sand being considered for reducing the negative impact of one of the manifestations of exogenous plains on such an important natural-technical system as a railroad. It suggests practical measures to build a system of design protection against sand drifts. The article also suggests ways to conserve resources and rational use of machinery and performers as well as the consolidation of mobile sand wet with water soluble waste of local production of waste dextrin. Consolidation is exposed on dry and wet sand.
    В статье, основываясь на теоретических положениях снижения негативного влияния экзогенных проявлений на железную дорогу, в частности, борьбы с песчаными заносами и исходя из практики закрепления подвижных песков, а также в целях экономии ресурсов и рационального использования машин и исполнителей, делается вывод о преимуществе водорастворимых вяжущих веществ из отходов местной промышленности, например, декстрина и применения его и других рекомендованных вяжущих в песках влажного состояния.
    Źródło:
    Transport Problems; 2016, 11, 3; 145-152
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of circuit training on physical fitness and archery accuracy in novice athletes
    Autorzy:
    Susanto, Susanto
    Siswantoyo, Siswantoyo
    Prasetyo, Yudik
    Putranta, Himawan
    Powiązania:
    https://bibliotekanauki.pl/articles/1932985.pdf
    Data publikacji:
    2021-06-09
    Wydawca:
    PPHU Projack Jacek Wąsik
    Tematy:
    archery
    arm strength
    endurance
    physical fitness
    training methods
    Opis:
    Introduction: Physical condition is one of the most important factors in supporting archery. the better the physical condition, the better the concentration to support accuracy in archery. Concentration in archery is the ability to target targets accurately. Purpose: The purpose of this study was to determine the effect of circuit training on improving physical fitness and archery accuracy in novice athletes. Materials and Methods: Participants were 20 novice athletes, aged 10 to 12 years. Quasi-experimental research design, using two group pretest-posttest design. The method of collecting data on physical fitness uses the Indonesian physical fitness test (IPFT) aged 10-12 years and the accuracy test is by shooting arrows at the target. Data analysis used paired sample t-test, to determine differences in variable groups of men and women. The analysis results showed no difference if the significant value was less than 0.05 (p<0.05). Before analyzing the data, a prerequisite test was carried out which included the Shapiro Wilk normality test and the variate homogeneity test using the Levene's test. Results: The results showed that there was a significant increase in physical fitness in the male and female groups. Therefore, there was a significant improvement in the accuracy of archery shots in the male and female groups. The study concluded that circuit training is effective for improving physical fitness and archery accuracy in novice athletes.
    Źródło:
    Physical Activity Review; 2021, 1, 9; 100-108
    2300-5076
    Pojawia się w:
    Physical Activity Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contextual Methodology of Formation of Diagnostic Competence of Future Officers – Specialists of Physical Training and Sports in the Process of Professional-Pedagogical Training
    Autorzy:
    Yahupov, Vasyl
    Dubrovska, Olena
    Powiązania:
    https://bibliotekanauki.pl/articles/29430822.pdf
    Data publikacji:
    2023-09-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    diagnostic competence
    head of physical training and sports
    methodology
    formation
    stages
    methods
    means
    Opis:
    The article is devoted to the theoretical substantiation of contextual methodology of formation of diagnostic competence of future officers – specialists of physical training and sports in higher military educational institutions. Scientific approaches of foreign and domestic scientists to the concept of “methodology” are analyzed and generalized and the author’s definition of the concept “methodology of forming diagnostic competence of future officers – specialists of physical training and sports in the process of professional and pedagogical training” is proposed. Research methods: theoretical analysis of scientific literature; generalization and interpretation of the obtained theoretical and empirical data; design of contextual methodology of diagnostic competence formation. It contains the leading idea or principle, goals, objectives, stages, content, methods, methodological techniques and means of its formation in the process of professional-pedagogical education. The importance of introducing the special course “Diagnostic competence of future officers – specialists in physical training and sports and its formation in higher military educational institutions” is revealed and substantiated. It synthesizes, systematizes and concretizes the content of all their professional-pedagogical competence on the implementation of their diagnostic function in their future position in the troops. The content of the special course includes the following topics: Topic 1. Future officer – specialist of physical training and sport: concept, content and structure as a subject of educational activity in higher military educational institutions. Theme 2. Diagnostic activity of an officer – specialist of physical training and sport as a subject of military-professional activity in higher military educational institutions. Topic 3: Diagnostic competence of officers – specialists of physical training and sport as a component of military- -professional competence in military units. Theme 4. Methodology of formation of diagnostic competence of future officers – specialists in physical training and sports as subjects of diagnostic activity in higher military educational institutions. The following stages of method realization are defined: diagnostic-motivational; cognitive-activational; evaluative-resultant.
    Źródło:
    Viae Educationis; 2023, 3; 7-17
    2956-2856
    Pojawia się w:
    Viae Educationis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Discussion of the research results of judo games at the initial stage of long-term training
    Autorzy:
    Masenko, Larisa
    Powiązania:
    https://bibliotekanauki.pl/articles/1054939.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    age-related features
    and methods of training
    effectiveness
    physical abilities
    specialized action-oriented games
    testing
    Opis:
    The article deals with the effects of improved methods of training 7–12 year old children at the initial stage of long-term training using specialized Judo Games. Modern methods of training in many sports, Judo in particular, are characterized by early specialization. In this regard there could be observed immaturity of some existing training programs when age-related features of beginners are not taken into consideration, and as a result children’s health is suffering unfortunate consequences. Methods of initial Judo training open vast space for perfection and development of this kind of sports. The author initiated and practiced teaching and training process at the IT (initial training) stage Judo beginners by using Judo games as means of full development of physical features and shaping combat skills. This experiment proved to be actual and practically valuable.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2015, 10, 2; 109-115
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of tractor wheels on physical properties of different soil types and the irrigation efficiency of the furrow irrigation method
    Autorzy:
    Vistro, Rahim Bux
    Talpur, Mashooque Ali
    Shaikh, Irfan Ahmed
    Mangrio, Munir Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/2073733.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    furrow storage efficiency
    ridge storage efficiency
    irrigation methods
    soil physical properties
    tractor wheel trafficking
    water use efficiency
    Opis:
    In furrow irrigation, the maximum lateral movement of water in ridges is more desirable than the vertical downward movement. This can be achieved by compacting the furrows. Thus, the study examines the impact on furrow soil compaction by tractor wheel trafficking during mechanical operations in the different soil types. In this experiment, the three-wheel tractor compaction includes: 1) control (no soil compaction), 2) compaction through 3-wheel tractor passes, and 3) compaction through 6-wheel passes under three different soil textural classes such as: clay loam, silty clay loam and silty loam soils. The impact of various treatments on clay loam, silty clay loam, and silty loam under 3- and 6-wheel passes showed increased bulk density (7–12%), field capacity (9–19%), ridge storage efficiency (35–38%), water use efficiency (16–20.5%) and decreased soil porosity (7–16%), infiltration (8–20%), and furrow storage efficiency (28–41%) over the control. This study shows comparable results of 6-passes with other studies in which more than 6-passes were used to compact the soil. This study suggested that farmers can maximise water use efficiency by compacting their furrows using 6-passes tractor trafficking.
    Źródło:
    Journal of Water and Land Development; 2022, 52; 166--171
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and forecasting the workplace environmental physical factors values
    Autorzy:
    Kruzhilko, O.
    Cherneha, R.
    Maystrenko, V.
    Polukarov, O.
    Kalinchyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/379451.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    safety and health management
    environmental physical factors
    prediction
    methods
    strict ranking method
    zarządzanie bezpieczeństwem i higieną pracy
    środowiskowe czynniki fizyczne
    predykcja
    metody
    Opis:
    Purpose: To develop a mathematical model for predicting the workplace environmental physical factors values. Design/methodology/approach: Experimental measurements of the harmful and dangerous physical factors values of workplace environmental were carried out using special certified equipments. For each physical factor, 200 measurements were carried out. The workplace choice is justified by the employees’ survey and specialists’ expert evaluation results. Prediction methods that can be used to predict the workplace environmental physical factors values have been analyzed analytically. Working conditions assessment was carried out in accordance with the classification of working conditions for workplace harmfulness and danger, which function in Ukraine. Findings: For a preliminary assessment of the impact of environmental physical factors on workers, it is proposed to use the strict ranking method. It has been established that the proposed mathematical models for predicting the workplace environmental physical factors values (noise, dust, vibration, relative humidity) have an accuracy of more than 90% and can be used for planning measures to working conditions improve. Research limitations/implications: The results of a study of modelling and forecasting the workplace environmental physical factors values at the enterprise for the manufacture of glass and glass products at workplaces of transportation, preparation and mixing of materials are shown. Mathematical models for four physical factors are presented: noise, dustiness of air, vibration, relative humidity. Practical implications: Mathematical models make it possible to predict the environmental physical factors values (noise, vibration, dust, humidity) taking into account the specifics of the production process, assess the hazard class and harmfulness of working conditions at workplaces and justify the measures at labour protection. Originality/value: For the first time proposed by the mathematical models for predict the environmental physical factors values (noise, vibration, dust, humidity) taking into account the specifics of the production process.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 100, 1/2; 21-33
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction of Physical and Mental Work
    Autorzy:
    Singh, S.
    Aghazadeh, F.
    Ray, T. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/90541.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    physical work
    mental work
    psychophysical methods
    acceptable load limit
    fatigue
    praca a choroby
    praca mięśni
    praca umysłowa
    obciążenie pracą umysłową
    obciążenie fizyczne
    zmęczenie
    zmęczenie fizyczne
    Opis:
    The objective of the research was to determine the effect of mental load on the physical capacity of an individual. An experiment involving 9 combinations of lifting tasks, 1 lowering task, and 3 treadmill tasks was conducted. Heart rate was measured and maximum acceptable weight of lift was determined using the psychophysical method. A simple multiplication task was used as the mental load. The output variables were determined with and without the mental task. The results indicate that the individual’s physical capacity decreased with the mental task while lifting from floor to knuckle and shoulder to reach lifting heights.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 4; 451-463
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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