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    Tytuł:
    Effect of Traffic Exposure on Toughness Characteristics of Hand-Knotted Carpets
    Wpływ użytkowania ręcznie wiązanych dywanów na ich odporność przy ściskaniu
    Autorzy:
    Tabatabaei, S. M.
    Ghane, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/233549.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    hand-knotted carpet
    traffic exposure
    toughness
    toughness loss rate
    regression analysis
    turkish knot
    persian knot
    ręcznie tkany dywan
    ekspozycja ruchu
    wytrzymałość
    wskaźnik wytrzymałości strat
    analiza regresji
    turecki węzeł
    perski knot
    Opis:
    Compression performance is a major factor in determining the life wear of each carpet. The toughness of the pile surface, as one of the compression properties of carpets, changes when exposed to wear in use. The main aim of this study was to predict the toughness characteristics of the surface piles of hand-knotted carpets at different levels of traffic exposure. Two types of hand-knotted carpet samples with symmetric and asymmetric knots and similar structural specifications were produced. A Hexapod tumbler tester was used to impose controlled worn out at different traffic exposures (drum revolutions). The samples were then tested with a tensile tester in the compression mode, and load-crush curves were obtained. The compression toughness characteristics and loss rate of toughness of the carpet samples were determined at 0 (new carpet), 4000, 8000, 12000 and 16000 revolutions of the Hexapod tumbler tester. Regression analysis was used to find the correlation between the traffic exposure (drum revolutions) and compression toughness characteristics. The results showed that knot type affects the toughness characteristics of the carpet. However, this effect is not statistically significant at the 5% level. On the other hand, different traffic exposure significantly affects the toughness characteristics at the 5% level.
    Właściwości podczas ściskania są podstawowym czynnikiem określającym żywotność każdego dywanu. Odporność na ściskanie okrywy dywanu, jako jedna z podstawowych właściwości ściskania dywanu zmienia się z ich ekspozycją na zużycie. Głównym celem pracy było przewidywanie odporności na ściskanie okrywy ręcznie wiązanych dywanów przy różnym natężeniu ich użytkowania. Badano dywany o dwóch strukturach węzła – symetrycznej (tureckiej) i asymetrycznej (perskiej). Zastosowano specjalny przyrząd zgodny z ISO, symulujący obciążenie dywanów krokami. Sprawdzono charakterystykę dywanów po 0, 4000, 8000, 12000 i 16000 obrotów elementu obciążającego. Analiza regresji posłużyła do określenia korelacji pomiędzy ilością obciążenia a odpornością na zgniatanie. Stwierdzono, że charakter wiązania ma pewien niewielki wpływ na odporność dywanów na zgniatanie.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2015, 3 (111); 64-68
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise mapping due to motor vehicle activities in the by-pass ring road area of the city of Kendari
    Autorzy:
    Lakawa, Irwan
    Syamsuddin
    Hujiyanto
    Ilham, Vickky A.
    Powiązania:
    https://bibliotekanauki.pl/articles/36073172.pdf
    Data publikacji:
    2023
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    traffic
    noise exposure
    mapping
    ring road
    Opis:
    The By-Pass Ring Road in Kendari serves as a crucial artery, facilitating accessibility and mobility between the city center and burgeoning outskirts. However, heightened traffic has led to a notable upswing in noise along the highway. This study aims to systematically map the distribution of this noise across various land uses in the vicinity. The findings reveal a vehicular composition predominantly comprised of motorcycles (68%), followed by light vehicles (27%), and heavy vehicles (5%). Notably, although heavy vehicles constitute a mere 5%, they significantly influence the elevation of noise levels. The highest noise intensity impacting land use is observed in service areas, succeeded by commercial and school zones, with the lowest levels recorded in settlement areas. The mapped results depict a noise exposure of 67 dB reaching receptors, coupled with an average noise reduction of 9 dB. Remarkably, as the average distance from the noise source on the highway to the receptors increases (averaging 14 meters), there is a discernible reduction in noise intensity. This visually apparent trend is corroborated by the noise mapping results.
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2023, 32, 4; 392-406
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Risks of Social Noise Exposure in the Vulnerable Population in Slovakia
    Autorzy:
    Argalasova, L.
    Filova, A.
    Hirosova, K.
    Vondrova, D.
    Samohyl, M.
    Krajcova, D.
    Jurkovicova, J.
    Sevcikova, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/176401.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    social noise exposure
    road traffic noise
    personal music players
    university students
    Opis:
    The study is aimed to quantify the effects of social noise exposure (personal music players (PMP), events with high noise exposure) and the exposure to the other environmental noise sources in the selected sample of Slovak university students. The validated ICBEN methodology was used to assess noise annoyance. The measurement of ambient noise levels was done using hand-held sound level analyzer. There were 526 university students (143 males and 383 females, average age 23 ± 2.2) enrolled into the study so far, 192 in the exposed housing facility to road traffic noise and 326 in the control housing facility in Bratislava. The social noise exposure was quantified and followed according to the authorized methodology of the study Ohrkan. From the total sample 416 (79.4%) students reported the use of PMP in the last week for the average time of 314 minutes. There was a significant difference in PMP use between the exposed (85.34%) and the control group (76.31%) (p = 0:01). Among PMP users 28.1% exceeded the LAV (lower action value for industry = 80 dB). The results showed the importance of road traffic and the social noise as well and the need for prevention and intervention in these vulnerable groups.
    Źródło:
    Archives of Acoustics; 2016, 41, 3; 535-541
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traffic Noise and its Impact on Wellness of the Residents in Sambalpur City – a Critical Analysis
    Autorzy:
    Sahu, Alekh Kumar
    Nayak, Satish Kumar
    Mohanty, Chitta Ranjan
    Pradhan, Prasanta Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/1953465.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    traffic noise
    equivalent continuous noise level
    annoyance
    wellness
    noise exposure index
    Opis:
    Noise is unwanted sound judged to be unpleasant, loud or disruptive to hearing. Like air pollution, noise pollution is one of the serious matters of concern in urban areas. Noise pollution occurs when noise level exceeds certain limit and has deleterious effects on human health and wellness. The major sources of noise pollution are industries, road traffic, railways, airplane traffic and social celebrations. The traffic noise is notably high in cities due to higher density of population, frequent movement of people, good transport system coupled with increasing numbers of vehicles (on road). In this work, the assessments of traffic noise in Sambalpur city is presented. Twelve important locations were chosen for the assessment. Noise contours were drawn to visualize the spreading of traffic noise into its surroundings. At the same time, the effect of noise pollution on wellness of the exposed people was studied. The study shows that the traffic noise level and its effects, are both in an alarming stage in the city.
    Źródło:
    Archives of Acoustics; 2021, 46, 2; 353-363
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Work Efficiency Prediction of Persons Working in Traffic Noise Environment Using Adaptive Neuro Fuzzy Inference System (ANFIS) Models
    Autorzy:
    Yadav, Manoj
    Tandel, Bhaven
    Powiązania:
    https://bibliotekanauki.pl/articles/2141713.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    traffic noise
    noise exposure
    social questionnaire survey
    human work efficiency
    ANFIS prediction model
    Opis:
    A study was carried to assess the effect of traffic noise pollution on the work efficiency of shopkeepers in Indian urban areas. For this, an extensive literature survey was done on previous research done on similar topics. It was found that personal characteristics, noise levels in an area, working conditions of shopkeepers, type of task they are performing are the most significant factors to study effects on work efficiency. Noise monitoring, as well as a questionnaire survey, was done in Surat city to collect desired data. A total of 17 parameters were considered for assessing work efficiency under the influence of traffic noise. It is recommended that not more than 6 parameters should be considered for ANFIS modeling hence, before opting for the ANFIS modeling, most affecting parameters to work efficiency under the influence of traffic noise, was chosen by Structural Equation Model (SEM). As a result of the SEM model, two ANFIS prediction models were developed to predict the effect on work efficiency under the influence of traffic noise. R squared for model 1, for training data was 0.829 and for testing data, it was 0.727 and R squared for model 2 for training data was 0.828 and for testing data, it was 0.728. These two models can be used satisfactorily for predicting work efficiency under traffic noise environment for open shutter shopkeepers in tier II Indian cities.
    Źródło:
    Archives of Acoustics; 2021, 46, 4; 677-683
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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