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Tytuł:
Is It Reasonable to Expect Individuals to Wear Hearing Protectors for Extended Periods?
Autorzy:
Williams, W.
Powiązania:
https://bibliotekanauki.pl/articles/89843.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
hearing protectors
comfort
discomfort
communications
Opis:
The purpose of this work is to look at the expectations and actions that exist around the use of hearing protectors. Are our expectations for the performance of hearing protectors rational and is the way we expect them to be used reasonable? Perhaps we are expecting too much of hearing protectors and their ability to effectively reduce noise exposure. Better understanding of expectations and requirements along with improvements in technology and design offer the opportunity to markedly improve on the current situation.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 2; 175-181
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for evaluating discomfort glare based on the analysis of a digital image of an illuminated interior
Autorzy:
Błaszczak, U. J.
Powiązania:
https://bibliotekanauki.pl/articles/220384.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
discomfort glare
measurement
lighting
analysis
Opis:
The article proposes a method for measuring discomfort glare which uses numerical description of the phenomenon in the form of a digital luminance distribution map recorded on a CCD array. Essential procedures for determining partial quantities which are necessary for calculation of UGR index are discussed in detail, along with techniques for measuring position index and size of light sources, with regard to the parameters of the registering system and coordinates of the images of the sources on the array.
Źródło:
Metrology and Measurement Systems; 2013, 20, 4; 623-634
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Ergonomics Study on Posture-Related Discomfort and Occupational-Related Disorders Among Stonecutters of West Bengal, India
Autorzy:
Gangopadhyay, S.
Das, B.
Das, T.
Ghoshal, G.
Ghosh, T.
Powiązania:
https://bibliotekanauki.pl/articles/90199.pdf
Data publikacji:
2010
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
stonecutters
OWAS
posture-related discomfort
posture
Opis:
Stonecutting and setting are important tasks in a construction site. A field study was conducted to assess occupational-related disorders and to conduct ergonomics assessment among stonecutters. The study focused on (a) the duration of work per day, (b) the working environment and working activities and (c) the feeling of discomfort in different parts of the body. A detailed posture analysis was performed with the Ovako working posture analysis system (OWAS). It was observed that stonecutters worked continuously in awkward postures during stonecutting and setting. Consequently, they suffered from discomfort in different parts of their body, specifically in the lower back, knees and shoulders, which mainly prevented them from continuing their work. This study also revealed that stonecutters had to work in congested work areas with a poor level of illumination. The noise level and dust particles emitted during stonecutting activities could affect stonecutters.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2010, 16, 1; 69-79
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Eksperymenty i kompromisy: „mind-game films” we współczesnym kinie amerykańskim
Experiments and Compromises: Mind-Game Films in Contemporary American Cinema
Autorzy:
Szczekała, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/31342033.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Sztuki PAN
Tematy:
mind-game films
narracja
dyskomfort
narrative
discomfort
Opis:
Artykuł koncentruje się na fenomenie tzw. mind-game films – filmów powstających od końca lat 90., które cechują się m.in. skomplikowaną narracją, ontologicznie niepewnymi światami przedstawionymi, niestabilnymi mentalnie bohaterami ogniskującymi fabułę. Autorka tekstu osadza zjawisko mind-game films w kontekście przemian w estetyce i produkcji współczesnego kina amerykańskiego i odpowiada na pytanie, dlaczego okazało się ono najwyraźniej obecne właśnie w kinematografii USA. Choć eksperymenty narracyjne nakierowane na budzenie dyskomfortu poznawczego u widza były dostrzegalne już w kinie modernistycznym, to właśnie współczesne kino amerykańskie sprawiło, że stały się one oswajalne i przystępne dla szerszej widowni. Szczekała skupia się również na aspekcie estetyczno-ideologicznym zjawiska, analizuje najczęściej powtarzające się tematy i chwyty narracyjne oraz swoistą dla mind-game films formę „identyfikacji poznawczej”.
The article focuses on the phenomenon of the so-called mind-game films – films emerging from the end of the 1990s, which are characterized by, among others, complicated narrative, ontologically uncertain worlds, mentally unstable characters that focus the story. The author embeds the phenomenon of mind-game films in the context of changes in the aesthetics and production of contemporary American cinema and answers the question, why is it most present in the American film industry. Although narrative experiments aimed at arousing cognitive discomfort in the audience were already visible in the modernist cinema, it is the contemporary American cinema that made them acceptable to the wider audience. Szczekała concentrates also on the aesthetic and ideological aspects of the phenomenon, and analyses the most recurrent themes and narrative tricks, and specific to the mind-game films form of “cognitive identification”.
Źródło:
Kwartalnik Filmowy; 2016, 93-94; 140-152
0452-9502
2719-2725
Pojawia się w:
Kwartalnik Filmowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of stage fright on activities and sensations within the vocal tract
Autorzy:
Kosmowska, Aneta
Sielska-Badurek, Ewelina
Niemczyk, Kazimierz
Powiązania:
https://bibliotekanauki.pl/articles/1400403.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
social anxiety
palpation assessment
voice quality
voice discomfort
Opis:
Introduction: Stage fright is a symptom of excessive emotional arousal, and it is commonly referred to as social anxiety. This type of anxiety results mainly from a sense of being judged by others in a given social situation. Materials and Methods: We enrolled 27 female students, aged 22-30 years. We used two methods to examine the influence of stage fright on the activities and sensations within the vocal tract; namely, palpation assessment and the Vocal Tract Discomfort and Voice Quality questionnaire, which were performed twice, i.e., shortly after a presentation in front of an audience and after a normal conversation. The purpose of the study was to assess the impact of stage fright on actions and sensations within the vocal tract. Results: Participants had significantly higher scores with regard to palpation assessment, discomfort, and voice quality after presentations in front of an audience than after normal conversations, indicating a negative impact of stage fright on the studied parameters. Discussion: Stage fright significantly affects activities within the vocal tract structures such as the submandibular region, lateral pharyngeal walls, sternocleidomastoid muscles, and cricothyroid and thyrohyoid spaces; also, it affects jaw mobility and breathing patters. In addition, stage fright induces negative sensations within the vocal tract such as burning, tension, dryness, jaw clenching, throat tightness, grunting, shallow breathing, voice tremor, hoarseness, and faltering voice. The feeling of discomfort during situations that elicit stage fright correlates with self-assessed voice quality.
Źródło:
Polski Przegląd Otorynolaryngologiczny; 2017, 6, 3; 1-9
2084-5308
2300-7338
Pojawia się w:
Polski Przegląd Otorynolaryngologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Professional experience and ergonomic aspects of midwives’ work
Autorzy:
Nowotny-Czupryna, Olga
Naworska, Beata
Brzęk, Anna
Nowotny, Janusz
Famuła, Anna
Kmita, Bartosz
Bąk, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2180089.pdf
Data publikacji:
2012-06-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
midwives
working positions
spinal alignment
pain discomfort
Stabilometry
sonometry
Opis:
Objectives: The most frequent manner of attending childbirth imposes on midwives assuming poor body position affecting the musculoskeletal system. Long professional experience does not mitigate the negative effects. The adopted movement habit, as well as the type, number and frequency of actions influence the body posture. The aim of the study was to identify ergonomic threats of basic occupational midwives activities and how particular spinal segments arrangements while attending childbirth using the same technique in senior midwives differ from those of junior ones. It was also checked whether pain influences the working position assumed by midwives. Materials and Methods: Examinations were conducted in 95 midwives aged 21–50 (X = 29.25±9.34): 51 graduates of BSc midwifery who worked 680 h in delivery rooms during obligatory practical classes and apprenticeship and 44 senior midwives with professional experience of 7–27 years (X = 14.84±5.98). The study was threefold. The spinal alignment while performing work activities associated with attending childbirth was assessed using the OWAS system and the SonoSens Monitor, the center of gravity projection on basal plane – using the AccuGait AMTI stabilometric platform. The measurements were taken during a simulation of attending childbirth (on examination model). A survey was conducted aimed at identifying spinal pain. Results: Midwives’ working postures require unnatural body alignments. Postural instability in the working position and no maximal usage of basal plane were observed. The work overload may afflict the musculoskeletal system, which was confirmed by different pain discomforts in 67.3% of the examinees. Conclusions: Spinal alignment while attending childbirth is individually differentiated and in every case non-ergonomic. Identifying explicitly spinal overloads is difficult, but the most prevalent ones affect lumbar and cervical regions altogether. Spinal pain is frequently noted, both in junior and senior midwives, and is characteristic for midwives working in maximal movement ranges.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2012, 25, 3; 265-274
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of discomfort glare in the 50+ elderly: experimental study
Autorzy:
Wolska, Agnieszka
Sawicki, Dariusz
Powiązania:
https://bibliotekanauki.pl/articles/2178853.pdf
Data publikacji:
2014-06-21
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
lighting
glare
UGR
50+ elderly
asthenopia
discomfort glare evaluation
Opis:
Objectives: The aim of the study was to analyze discomfort glare sensation in subjects aged 50 years and more in comparison with younger subjects (i.e. younger than 35 years of age). Material and Methods: The experiments were performed on a computer workstation placed in controlled lighting environment where 2 discomfort glare conditions were modeled. Each participant performed for about 1 h specially designed visual tasks, including the tests with Landolt's rings presented on the screen by a computer program. The glare evaluation method consisted of subjective evaluation of discomfort glare on the semantic glare rating scale, tests of mesopic contrast and glare sensitivity, subjective assessment of lighting quality and asthenopic symptoms. The time needed to perform the task and the number of mistakes were also recorded. The subjective evaluation of glare was compared with the Unified Glare Rating (UGR) index calculated by the DIALux simulation program. Results: A higher percentage of the younger group subjects assessed glare after the experimental session as uncomfortable and intolerable than in the 50+ group, who more often assessed glare as acceptable. The assessment of discomfort glare in the younger group corresponded to higher UGR value compared to UGR value calculated by DIALux. In the 50+ group, such correlation was found only for lower discomfort glare (UGR = 19). The results showed that younger participants more frequently suffered from visual fatigue and assessed lighting as less comfortable. However, the mesopic glare sensitivity increased significantly after the experiments only in the 50+ group under both glare conditions. Conclusions: The obtained results showed that discomfort glare sensation changes with age. The younger population seems to be more sensitive and demanding than the older one in relation to discomfort glare limiting, in spite of the lack of significant objective measures of fatigue. The exposure of the elderly to bigger discomfort glare could adversely affect the objective measures of fatigue like mesopic glare sensitivity and visual performance.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 3; 444-459
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Road ambulances: working conditions of paramedics – pilot studies
Autorzy:
Bęczkowska, Sylwia
Grabarek, Iwona
Pilip, Sławomir
Szpakowski, Leszek
Gałązkowski, Robert
Powiązania:
https://bibliotekanauki.pl/articles/2116733.pdf
Data publikacji:
2020-01-17
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
questionnaire survey
paramedics
occupational hazard
ergonomic
musculoskeletal discomfort
ambulances
Opis:
ObjectivesThe article presents the results of selected pilot studies conducted in medical ambulances. Their aim was to determine the working conditions and identify troublesome factors accompanying the performance of basic medical procedures by rescue teams.Material and MethodsThe study of working conditions was carried out in Mercedes-Benz ambulances, type S and P. Fifty-one paramedics of the Emergency Medical Rescue Service in Siedlce took part in the research. The questionnaire expert survey method and the direct observation method were used.ResultsAs a result of the applied research methods, knowledge was gained on the irregularities and difficulties that occur at the workplace of a paramedic, i.e., in an ambulance, including the lack of access to essential elements of medical equipment and their different location inside the vehicle, and the diversity of solutions for the spatial structure of ambulances, which all cause difficulties at work. Research has shown that paramedics take, on average, 33 min to familiarize themselves with the location of equipment in an ambulance other than the one in which they are usually on duty. There was no correlation between the lifeguard’s length of service and the time necessary for getting acquainted with the equipment, which was studied using Pearson’s correlation coefficient. In the study, rescuers also pointed to musculoskeletal ailments, mainly spinal pains resulting from taking forced positions during medical activities in an ambulance.ConclusionsThe results obtained constitute the basis for the author’s methodology of complex research aimed at defining the ergonomic recommendations necessary in the modification process of the operated medical fleet. The next step will be to formulate uniform guidelines for the construction of medical compartments of ambulances, the application of which will lead to the unification of their spatial structure regardless of the vehicle brand.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2020, 33, 1; 91-105
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda pomiaru wskaźnika UGR z wykorzystaniem kamery z detektorem CCD
The method for UGR index measurement with use of a camera with CCD matrix
Autorzy:
Błaszczak, U. J.
Powiązania:
https://bibliotekanauki.pl/articles/157230.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
olśnienie przykre
pomiar
matryca CCD
discomfort glare
measurement
CCD matrix
Opis:
W artykule opisano wyniki badań mających na celu opracowanie metody pomiaru olśnienia przykrego, wykorzystującej kamerę z matrycą CCD. Przedstawiono ogólne informacje na temat olśnienia i dotychczasowych prób jego oceny. Zaprezentowano oryginalną metodę pomiaru wielkości niezbędnych do wyznaczenia wskaźnika UGR, którą poparto wynikami badań eksperymentalnych. Dzięki temu wykazano możliwość pomiaru olśnienia przykrego za pomocą miernika w konfiguracji cyfrowej kamery otworkowej.
In the paper the results of investigations on elaboration of a discomfort glare measurement method are described. This method uses a camera with CCD matrix. In the introduction some general information about glare [1, 2, 3, 4, 5, 6] and attempts to measure it [7] are presented. Besides, the most reliable system of glare evaluation - called the unified glare rating system UGR [8, 9] - is introduced. It imposes the necessity of estimation of the following quantities: background luminance, luminance of glare sources, their angular size and spatial arrangement (Fig. 1). A novel method for measurement of these quantities and, as a result, of the UGR index is described in Paragraph 2. It uses a pinhole digital camera. In practice this method consists in taking a series of images of the analysed area in the investigated interior. These images are used to calculate the background luminance, the luminance of each source within the field of view, their Guth position indexes and solid angles [7, 8]. It is done on a basis of the brightness analysis and localization of each pixel on the image (Figs. 2 and 3). After including parameters of the imaging system these results give information about the searched quantities. In Paragraph 3 the structure and most important parameters [7, 10, 11] of the research stand (from the photometry point of view) are described. If the luminance distribution is included by the single image, the luminance distribution measurement uncertainty is 6,83%. The exemplary results of the UGR index measurements are presented in Paragraph 4. For the luminance distribution simulated in a laboratory and contained in the field of view of the imaging system the maximum error was 6,9%. In a real didactic room this error was about 28%. In conclusions the discussion of the presented results is carried out. The possible directions of later investigations are suggested.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 2, 2; 150-153
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relationship Between Psychosocial Work Factors, Work Stress and Computer-Related Musculoskeletal Discomforts Among Computer Users in Malaysia
Autorzy:
Zakerian, S. A.
Subramaniam, I. D.
Powiązania:
https://bibliotekanauki.pl/articles/91000.pdf
Data publikacji:
2009
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
Malaysia
musculoskeletal discomfort
work stress
psychosocial work factors
office worker
Opis:
Increasing numbers of workers use computer for work. So, especially among office workers, there is a high risk of musculoskeletal discomforts. This study examined the associations among 3 factors, psychosocial work factors, work stress and musculoskeletal discomforts. These associations were examined via a questionnaire survey on 30 office workers (at a university in Malaysia), whose jobs required an extensive use of computers. The questionnaire was distributed and collected daily for 20 days. While the results indicated a significant relationship among psychosocial work factors, work stress and musculoskeletal discomfort, 3 psychosocial work factors were found to be more important than others in both work stress and musculoskeletal discomfort: job demands, negative social interaction and computer-related problems. To further develop study design, it is necessary to investigate industrial and other workers who have experienced musculoskeletal discomforts and work stress.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2009, 15, 4; 425-434
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metoda pomiaru wskaźnika UGR z wykorzystaniem kamery z detektorem CCD
The method for UGR index measurement with use of a camera with CCD matrix
Autorzy:
Miluski, P.
Dorosz, J.
Powiązania:
https://bibliotekanauki.pl/articles/157232.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
olśnienie przykre
pomiar
matryca CCD
discomfort glare
measurement
CCD matrix
Opis:
W artykule przedstawiono ideę oraz praktyczną realizację czujnika wybranych parametrów cieczy przepływającej przez dwuwarstwowy światłowód kapilarny, określanych na podstawie pomiaru współczynnika załamania światła tej cieczy. Zaprezentowano analizę działania sensora zrealizowaną z wykorzystaniem metody elementarnych strumieni świetlnych. Jako przykład zastosowania zaprojektowanego i wykonanego czujnika, przedstawiono czujnik temperatury oleju pracujący w zakresie 10-70 °C. Zmiana temperatury w badanym zakresie implikuje zmianę współczynnika załamania światła oleju w granicach 1,370-1,385. Przedstawiono konstrukcję i charakterystyki wytworzonego czujnika. Głównymi zaletami tego rozwiązania są: szybkość wykonywania pomiarów, zapewnienie izolacji galwanicznej z mierzoną cieczą oraz możliwość ciągłego monitorowania cieczy przepływającej przez światłowód kapilarny. Jest to istotne w wielu zastosowaniach w automatyce i w systemach kontroli procesów przemysłowych, gdzie zaprezentowany czujnik może znaleźć zastosowanie.
The paper presents an idea and practical realization of a sensor for determination of selected properties (e.g. temperature or concentration of solution etc.) of liquid flowing through double layer capillary waveguide based on measurements of the refractive index of this liquid. The transfer of a luminous flux through the capillary waveguide was performed by numerical analysis using the ray propagation method. The simulation showed that the response signal from the capillary sensor depends strongly on the liquid refractive index. For the liquid refractive index changes from 1.5 to 1.3 the output signal decreased to 50% of the initial value. It suggests the good sensitivity of the double layer capillary waveguide. The presented sensor was applied to determine the industrial oil temperature within the range of 10-70 °C. It corresponds to the oil refractive index change from 1.370 to 1.385. The main advantages of the presented sensor are: fast measurements, electrical isolation between the liquid measured and the electrical equipment used as well as continuous monitoring of the measured value without change of the sample. The described capillary optical fibre sensor is useful for automation and remote control of many industrial processes.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 2, 2; 154-156
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ergonomy of the inside of a motorcar cabin used by a person with locomotive disability- a case study investigations of the subjective discomfort sensation
Autorzy:
Zabłocki, M.
Sydor, M.
Powiązania:
https://bibliotekanauki.pl/articles/242400.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
personal car
driver with a locomotive disability
questionnaire examination
interviews
discomfort
Opis:
The study presents results of investigations carried out in the course of driving a motorcar by a person with a locomotive disability. Driving tests were conducted in road conditions, The scope of the performed analysis covered investigations concerning somatic and receptor relationships in the man - technical means system and, to a lesser extent, dealt with the psychological aspects of vehicle driving. The investigations employed selected methods of identification of expectations from direct users - questionnaire and interview. Initial investigations were carried out for one person with a locomotive disability (paraplegia). The authors used tests for the determination of subjective sensations during motorcar driving (comfort test and seat comfort). The employed questionnaire tools used verbal and point scales. The final result of initial experiments is a description of the adjustment of the vehicle with equipment (manually-operated accelerator - brake device) to the requirements of the driver with a locomotive disability on the basis of the driver 's subjective sensations of discomfort. This type of Information obtained in the form meeting the wishes or demands of the user provides the basis for the elaboration of design requirements. The results indicate that a typical driver's space designed for an able-bodied person does not fully meet the requirements of a person with a locomotive disability.
Źródło:
Journal of KONES; 2009, 16, 1; 567-570
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dyskomfort lokalny na stanowisku pracy
Local discomfort on the work station
Autorzy:
Dudkiewicz, E.
Jeżowiecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1819790.pdf
Data publikacji:
2009
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
komfort cieplny
stanowisko pracy
wilgotność
dyskomfort
thermal comfort
work station
discomfort
Opis:
Parametry zmienne, badane standardowo do oceny komfortu cieplnego środowiska wewnętrznego człowieka, to temperatura powietrza wewnętrznego, temperatura promieniowania (średnia temperatura przegród otaczających),wilgotność względna powietrza, prędkość powietrza, aktywność człowieka i izolacyjność cieplna jego odzieży. W przypadku występowania w pomieszczeniu parametrów odbiegających od uznawanych za komfortowe, ludzie mogą odczuwać dyskomfort cieplny, co m.in. powoduje obniżenie wydajności ich pracy. Komfort cieplny człowieka oceniany jest najczęściej za pomocą wskaźników PMV i PPD, opracowanych przez Fangera [3] i dotyczących ciała całego człowieka. Wskaźnik PMV oznacza przewidywaną średnią ocenę komfortu cieplnego, zaś wskaźnik PPD przewidywany odsetek osób niezadowolonych. Pomimo korzystnych wartości wskaźników komfortu cieplnego, człowiek może jednak odczuwać tzw. dyskomfort lokalny, który wywołany może być przez następujące czynniki [4]: przeciąg (rozumiany jako stan opisany w [3]), zmianę temperatury powietrza wraz z wysokością pomieszczenia, zbyt zimną lub ciepłą podłogę, asymetrię promieniowania, czyli występowanie w pomieszczeniu przegród o temperaturze różnej od temperatury powietrza.Norma ISO 7730 [4] podaje sposób wyznaczania wskaźników komfortu oraz sposób obliczania odsetek osób niezadowolonych na podstawie warunków termicznych odczuwanych przez całe ciało i osób odczuwających dyskomfort lokalny.
Maintenance of proper conditions at the work station is of a particular importance as it is proved by results of several different researches saying that in many cases indoor thermal conditions set outside of the recommended range, have an influence on the results of human's work. The paper discusses the human thermal comfort conditions, indoors, with particular focus on the work stations in the large volume halls. The human thermal comfort is usually evaluated by the means of PMV and PPD index. Both of them refer to the entire human body. PMV index describes the predicted mean evaluation of the thermal comfort and PPD index expresses the predicted percentage of dissatisfied persons. Despite favorable values of the thermal comfort indexes, human may however, feel so-called local discomfort, which may be caused by: draft, vertical temperature gradient inside a room, too cold or too warm floor, radiant temperature asymmetry caused by walls with temperature different then temperature of the air. The paper presents the procedure of the comfort indexes determination and also the calculation procedure for the percentage of dissatisfied people, based on the technical conditions sensed by the entire body and persons feeling the local discomfort. The paper includes also the description of the research post designed for the research of thermal conditions at the work station heated with the radiant ceiling panel installed in the high volume room. The research results have been presented with the calculation of radiant temperature and radiant temperature asymmetry. The local discomfort index has been determined as a value derived from the radiant temperature asymmetry. The research results were the basis for the formulation of the rules for the radiant ceiling panel installation over the work station in order to maintain the evenly distributed thermal field.
Źródło:
Rocznik Ochrona Środowiska; 2009, Tom 11; 751-759
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Audio-Visual Environmental Stimuli. Complementarity of Comfort and Discomfort Scales
Autorzy:
Felcyn, Jan
Preis, Anna
Praszkowski, Marcin
Wrzosek, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1953463.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
audio-visual interaction
environment assessment
discomfort
comfort
environmental perception
environmental quality
Opis:
The aim of the study was to examine how the wording of a question about audio, visual and audiovisual stimuli can affect the assessment of the environment. The participants of the psychophysical experiments were asked to rate, on a numerical scale, audio and visual information both separately and together, combined into mixes. A set of questions was used for all the investigated audio, visual, and audio-visual stimuli. The participants were asked about the comfort or the discomfort caused by the perceived stimuli presented at three different sound levels. The results show that there are no statistically significant differences between the assessment of comfort and discomfort associated with visual samples. Actually, the comfort and discomfort ratings are equivalent to the extent that a discomfort rating can be represented as the opposite to the comfort rating, i.e. the discomfort rating is equal to the 10 minus comfort rating. In general, the results obtained for audio and audio-visual samples were the same, with only a few exceptions that were dependent on sound level. No statistically significant differences were found for the loudest stimuli, but there were some exceptions for the softener cases. Based on the results, we show that only for visual stimuli both scales are totally interchangeable. When presenting audio and audio-visual samples, only one scale should be applied – either discomfort or comfort, depending on the context and the character of the stimuli.
Źródło:
Archives of Acoustics; 2021, 46, 2; 279-288
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improve of Footwear Comfort Sensation with Material Packages and Knitted Fabrics
Nowe możliwości poprawy komfortu użytkowania obuwia poprzez zastosowanie dzianin dystansowych w roli materiałów wyściółkowych
Autorzy:
Serweta, Wioleta
Olejniczak, Zbigniew
Matusiak, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/232272.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
footwear comfort
discomfort index
textile package
komfort obuwia
wskaźnik dyskomfortu
materiał obuwniczy
Opis:
The main goal of this paper was to analyse the hygienic properties of textile packages used for the construction of shoe uppers. Distance fabrics with varied hygienic properties were the basis of these packages. The discomfort indexes, which describe changes in footwear microclimate, were calculated according to the moisture absorbance capacity and temperature changes in the immediate surrounding of the foot skin surface. The experiment was done for a group of grain leather uppers, where the Grubbs test (α = 0.05) gave positive information about the outliers, describing such parameters as the water vapour permeability and water vapour coefficient. The phase changes of the shoe microclimate were detected via temperature and relative humidity sensors during simulation of the shoes used via an elliptical trainer for a group of 7 men. Statistically significant differences between the packages upper – lining confirmed the possibility of monitoring the circulation of biophysical mediums inside a footwear volume. The appropriate choice of package materials could raise the comfort conditions for users. For certain material configurations the microclimate conditions described by the discomfort index were improved.
Głównym celem pracy była analiza właściwości higienicznych układów materiałowych przeznaczonych na wierzchy obuwia. Bazę dla każdego z tych układów stanowiła dzianina dystansowa o zróżnicowanych parametrach higienicznych. Przeprowadzone badania symulacji wysiłku oraz rejestracja poziomu zawilgocenia oraz zmian temperatury w warstwie przyskórnej pozwoliły na ustalenie wskaźników dyskomfortu, które stanowią projekcję zmian mikroklimatu wewnątrz obuwia. Badania wykonano w grupie wierzchów skórzanych (skóra licowa), charakteryzujących się na mocy testu Grubbsa brakiem wartości odstających w zbiorze danych opisujących takie parametry higieniczne, jak przepuszczalność pary wodnej oraz współczynnik pary wodnej. Istotność statystyczna różnic pomiędzy poszczególnymi układami wierzch – podszewka – wyściółka potwierdziła fakt możliwości sterowania procesem cyrkulacji mediów biofizycznych na linii stopa – otoczenie poprzez odpowiedni dobór materiałów obuwniczych.
Źródło:
Fibres & Textiles in Eastern Europe; 2019, 3 (135); 85-90
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 48

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