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    Wyświetlanie 1-8 z 8
    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 trend and structure of adolescents’ weekly step count in the context of the Polish school environment
    Autorzy:
    Groffik, D.
    Fromel, K.
    Vorlicek, M.
    Polechoński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086055.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    healthy lifestyle
    physical activity
    recommendation
    adolescent behaviour
    environment
    Opis:
    Introduction and objective. Weekly physical activity (PA) in adolescents is significantly correlated with the educational programme and school environment, where the basis of healthy work habits and a healthy lifestyle is laid. The aim of the study was to identify the differences in the trend and the structure of the weekly step count in adolescent boys and girls in the context of the Polish school environment. Materials and method. A total of 930 boys and 1,354 girls aged 15–19 years from 64 secondary schools in the Katowice region participated. The research was conducted between 2011–2018. For the objective monitoring of weekly PA, Yamax Digiwalker SW-700 pedometers were used. Results. Between 2011–2014 and 2015–2018, no significant differences were observed in step counts on an average week day, school day, or weekend day. This means that the level of PA, expressed as daily step count, did not decrease between the two 4-year periods. On average, boys performed 10,799 steps/day, while girls performed 10,130 steps/day. The recommendation of 11,000 steps/day was achieved by 42.2% of boys and 35.3% of girls. A significant decrease by 8.6 percentage points in the achievement of 11,000 steps/day between the two 4-year periods was observed only in boys. Conclusions. It is positive that in the 8-year monitoring of PA, there was no significant decrease in the average steps/day for Polish boys and girls. However, most boys and girls did not meet the 11,000 steps/day recommendation. Both boys and girls were most physically active on Friday and least physically active on Sunday.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 442-447
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Środowiskowe konteksty nierówności w zdrowiu na przykładzie danych z zakresu epidemiologii chorób nowotworowych w Polsce i województwie śląskim
    Environmental Contexts of Health Inequalities on the Example of Data on Cancer Epidemiology in Poland and in the Silesian Voivodeship
    Autorzy:
    Borzucka-Sitkiewicz, Katarzyna
    Leksy, Karina
    Powiązania:
    https://bibliotekanauki.pl/articles/1808267.pdf
    Data publikacji:
    2019-09-25
    Wydawca:
    Wydawnictwo Uniwersytetu Śląskiego
    Tematy:
    health inequalities
    environment
    cancer epidemiology
    diet
    physical activity
    Opis:
    Health inequalities are being increasingly considered in describing population health and creating health policies. Particular emphasis is put on the so-called social inequalities, however, it is emphasized that they may also be conditioned by biological or environmental factors. The latter type of inequalities is the subject of interest in the present study. The presented research results are a part of wider diagnostic activities that were undertaken within the Onkogranty II project. They include a comparison of data on the epidemiology of cancer caused by low physical activity and poor diet in the province of Silesia and throughout the country.
    Źródło:
    Chowanna; 2019; 383-396
    0137-706X
    2353-9682
    Pojawia się w:
    Chowanna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Family, school and neighborhood factors moderating the relationship between physical activity and some aspects of mental health in adolescents
    Autorzy:
    Kleszczewska, Dorota
    Mazur, Joanna
    Siedlecka, Jadwiga
    Powiązania:
    https://bibliotekanauki.pl/articles/2161958.pdf
    Data publikacji:
    2019-07-15
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    family
    physical activity
    environment
    adolescents
    Mental Health
    neighborhood
    Opis:
    The impact of physical activity on mental health is widely described in literature. Less attention is given to factors which may modify this correlation, except for gender. The aim of this study was to conduct a qualitative assessment of such papers relating to children and young people. Selected papers were evaluated with regard to additional factors related to family, school and neighborhood. Attention was drawn to the definitions of these variables, the methods of analysis, and the content of the discussion. The starting point for this study included 7 systematic reviews published in 2006–2018. A total of 161 full articles described in detail in those reviews, and representing different research patterns, were selected for qualitative analysis. They met the criteria for the type of publication, mental health outcome, the direction of association, and the age group. A supplementary section of this paper contains a review of Polish literature from the Polish Medical Bibliography, and an analysis of national studies and some more recent papers not included in the analyzed reviews. It was demonstrated that 33 papers analyzed environmental variables to a greater degree than the characteristics of the sample. Twenty-three papers containing the results of statistical analyses were considered to be of particular interest. Almost 50% of these included both the socio-economic position of the family and the characteristics of the neighborhood. However, only 1 featured stratification of the sample with regard to contextual environmental variables. The obtained results are of great practical importance. Firstly, development of the research into environmental moderators should be advocated. Secondly, the social context in which adolescents grow up should be taken into account when designing intervention programs. Int J Occup Med Environ Health. 2019;32(4):423–39
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2019, 32, 4; 423-439
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Behavior of helical piles - as a geoenvironmental choice - by frustum confining vessel (FCV)
    Autorzy:
    Khazaie, J.
    Eslami, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/102327.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    helical pile
    environment
    geoenvironment
    frustum confining vessel (FCV)
    physical modeling
    bearing capacity
    Opis:
    Helical piles are environmental friendly and economical deep foundations that due to environmental considerations are excellent additions to the variety of deep foundation alternatives available to the practitioner. Helical piles performance depends on soil properties, the pile geometry and soil-pile interaction. Helical piles can be a proper alternative in sensitive environmental sites if their bearing capacity is sufficient to support applied loads. The failure capacity of helical piles in this study was measured via an experimental research program that carried out by Frustum Confining Vessel (FCV). FCV is a frustum chamber by approximately linear increase in vertical and lateral stresses along depth from top to bottom. Due to special geometry and applied bottom pressure, this apparatus is a proper choice to test small model piles which can simulate field stress conditions. Small scale helical piles are made with either single helix or more helixes and installed in fine grained sand with three various densities. Axial loading tests including compression and tension tests were performed to achieve pile ultimate capacity. Results indicate the helical piles behavior essentially depends on pile geometric characteristics, i.e. helix configuration and soil properties. According to the achievements, axial uplift capacity of helical model piles is about equal to usual steel model piles that have the helixes diameter. Helical pile compression bearing capacity is too sufficient to act as a medium pile, thus it can be substituted other piles in special geoenvironmental conditions. The bearing capacity also depends on spacing ratio, S/D, and helixes diameter.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 31; 8-22
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Functional fitness, quality of life and living in the moment, senior population study
    Sprawność funkcjonalna, jakość życia i życie w teraźniejszości, studium populacji seniorów
    Autorzy:
    Uher, I.
    Pilis, A.
    Litavcova, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/4862.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
    Tematy:
    functional fitness
    life quality
    present time
    body mass index
    physical health
    social relationship
    environment
    senior
    statistical analysis
    Opis:
    It is well known that our internal state affects our ability to perform everyday tasks. Some studies [6], [17] found that the admonition to live for a present is more important than we imagined. A human mind is a wandering mind, and a wandering mind is an unhappy mind [13]. The objective of the current study was to determine how living for a present relates to quality of life and functional fitness of senior cohorts (n = 38 F. mean age = 75,6 years (SD ± 9.4) that exercise regularly. Older adults completed a functional fitness test battery, quality of life and living for a present questionnaire. Living for a present was associated with age of participants, quality of life and BMI. No statistical significance was found between living for a present, functional fitness and medication use. The results support the role of living for a present as a correlate of age, BMI and quality of life. These data substantiate that living in a present could serve as an important course for better existence. In any means our study is not conclusive. Further study are needed to clarify this complex issue as living for a present no doubt represents.
    Źródło:
    Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna; 2014, 13, 2
    1895-8680
    Pojawia się w:
    Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Kultura Fizyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza uciążliwości i zagrożeń dla środowiska generowanych przez małą piekarnię ®
    Analysis of difficulties and threats for the environment generated by a small bakery®
    Autorzy:
    Piotrowski, D.
    Chruścik, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/228509.pdf
    Data publikacji:
    2017
    Wydawca:
    Wyższa Szkoła Menedżerska w Warszawie
    Tematy:
    piekarnia
    środowisko
    maszyny
    harmonogram
    odpady
    warunki pracy
    czynniki fizyczne
    bakery
    environment
    machines
    schedule
    wastes
    conditions of work
    physical factors
    Opis:
    Uciążliwości i zagrożenia dla środowiska tj. emisja CO2, powstawanie pyłów, ścieków oraz innych odpadów spowodowane przez niewielką piekarnię z reguły są na niskim poziomie. Celem pracy przedstawionej w artykule było rozpoznanie zagrożeń generowanych przez małą piekarnię oraz analiza wybranych uciążliwości wpływających na środowisko pracy pracowników. Analizy stanu pracujących urządzeń systematycznie przeprowadzane są przez pracowników, co przyczynia się do ograniczenia uciążliwości i zagrożeń w zakładzie. Ważne jest racjonalne zarządzanie energią elektryczną, wodą oraz olejem opałowym/gazem spalanym w piecach piekarskich, ponieważ nieefektywne zużycie tych czynników, ma niekorzystny wpływ na środowisko naturalne. Rozpoznano wybraną technologię wypieku, zastosowane maszyny i urządzenia wraz z harmonogramem ich pracy i opisano to w artykule. Przedstawiono listy zidentyfikowanych uciążliwości występujące wewnątrz i na zewnątrz niewielkiej piekarni. Informacje o czynnikach fizycznych wpływających na warunki pracy tj. oświetlenie czy poziom hałasu powinny być obligatoryjnie przechowywane wraz z aktualizowaną dokumentacją piekarni.
    Difficulties and threats for the environment i.e. CO2 emission, formation of dusts, sewages and different wastes caused by small bakeries as a rule are on the low level. The aim of the article was to recognize the threats, which result from the work of the small bakery and analyse of chosen difficulties illustrating their influence on the operation environment for employees. Systematic analyses of facilitates state of working difficulty should be carried out by employees and result with limited difficulties and threats in the plant. The efficient management of electric energy, water and fuel oil / the gas burnt in bakery’s stoves is the important aspect because the ineffective wastes of these factors create the unfavourable influence has on the natural environment. In the article the technology of the baking was recognized as well applied the machines and device together with the recognized schedule of their work. Identified lists of difficulties existing inside and outside the small bakery were presented. Information about factors influencing the conditions of the work i.e. lighting or noise level were obligatory stored with actualized records of the bakery.
    Źródło:
    Postępy Techniki Przetwórstwa Spożywczego; 2017, 2; 56-62
    0867-793X
    2719-3691
    Pojawia się w:
    Postępy Techniki Przetwórstwa Spożywczego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possible Utilizations of Physical Waste Treatment Device
    Możliwość wykorzystania urządzeń do wzbogacania fizycznego odpadów
    Autorzy:
    Sezima, Tomas
    Sikora, Eugen
    Hekera, Tomas
    Frantis, Vladislav
    Kovac, Pavel
    Powiązania:
    https://bibliotekanauki.pl/articles/318246.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    środowisko
    odpady
    przetwarzanie odpadów
    fizyczne przetwarzanie odpadów
    zmniejszenie niebezpiecznych właściwości
    environment
    waste
    waste treatment
    physical waste treatment
    reducing hazardous properties
    Opis:
    This article presents possibilities of a unique device for industrial waste treatment using a patented process, and outlines possible future directions. This device, using different physical processes, individually or in synergy, e.g. combined effects of ultrasonic waves, focused microwave field, arc discharges, electrostatic field and the exposure to ultra-violet radiation, is intended to degrade dangerous substances in waste, reducing its hazardous properties for the environment and to prepare the waste for future applications (material or energy).
    W artykule przedstawiono możliwości zastosowania unikalnego urządzenia do przemysłowego przetwarzania odpadów przy użyciu opatentowanego procesu oraz nakreślono możliwe przyszłe kierunki zastosowania. Przedstawione urządzenie, wykorzystuje różne procesy fizyczne, indywidualnie lub w synergii, np. połączone skutki fal ultradźwiękowych, skupionego pola mikrofalowego, wyładowań łukowych, pola elektrostatycznego i ekspozycji na promieniowanie ultrafioletowe. Celem jest degradacja zawartości niebezpiecznych substancji w odpadach, zmniejszenie ich niebezpiecznego oddziaływania na środowisko i przygotowanie odpadów do przyszłych zastosowań (odzysk materiałowy lub energetyczny).
    Źródło:
    Inżynieria Mineralna; 2019, 21, 1/2; 39-42
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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