SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "WFRF:(Lundgren Kownacki Karin) ;conttype:(refereed)"

Search: WFRF:(Lundgren Kownacki Karin) > Peer-reviewed

  • Result 1-10 of 32
Sort/group result
   
EnumerationReferenceCoverFind
1.
  •  
2.
  • Alametsä, Jarmo, et al. (author)
  • Age-related circulatory responses to whole body cooling: observations by ballistocardiographic EMFi sensors
  • 2014
  • In: Proceedings of Ambience 14&10i3m : Scientific Conference for Smart and Functional Textiles, Well-Being, Thermal Comfort in Clothing, Design, Thermal Manikins and Modellin, 7-9 September 2014, Tampere, Finland - Scientific Conference for Smart and Functional Textiles, Well-Being, Thermal Comfort in Clothing, Design, Thermal Manikins and Modellin, 7-9 September 2014, Tampere, Finland. - 2342-4540. - 9789521532696 ; 1
  • Conference paper (peer-reviewed)abstract
    • The purpose was to study age related changes in circulatory system via Ballistocardiography (BCG) by utilizing Electromechanical Film (EMFi) sensors by gradually changing the ambient temperature from a thermoneutral area to cold direction. ECG and BCG were recorded from a young person (23 years) and from an older person (78 years), both males. During the tests, brachium blood pressure (BP) and pulse signals were recorded from neck and ankle (with EMFi sensor strips). Thermal camera images were taken in order to find out temperature changes in whole body and limbs. Temporal durations and amplitudes of seat BCG:s components (systolic and diastolic) as well as from pulse signals from neck and ankle were calculated. Aortic pulse wave velocity (PWV) was obtained by utilizing the time between ECG’s R wave and maximum value of the ankle pulse signal. In both persons, the ankle pulse amplitude decreased when propagating to cold direction and increased in young person when returning to warmer ambient temperature. With young and old BCG:s systolic and diastolic temporal complexes remained stable, but systolic amplitudes increased in the older person (AHI 1.02 – 2.87, AIJ 0.7 – 2.66) as well as diastolic amplitudes (old; AKL 0.47 – 2.37). In the older person, PWV increased when moving to colder side. BP increased with a young person (from 95/64 to 132/75 mmHg), and with older person (from 125/68 to 176/101 mmHg) having a prominent rise in diastolic values during the cooling. The neck pulse wave amplitude AOP rise was modest with the younger person and had variation with the older person. Older person had also more intensive shivering compared to younger one. With the older person, the limbs stayed cold in thermal images when returning from cold to thermoneutral area. The present preliminary observations indicated clear age-related differences in the circulatory response to a mild whole-body thermal challenge.
  •  
3.
  • Alametsä, Jarmo, et al. (author)
  • Age‐related circulatory responses to whole body cooling: observations by heart rate variability
  • 2015
  • In: Finnish Journal of eHealth and eWelfare. - 1798-0798. ; 7:2-3, s. 57-64
  • Journal article (peer-reviewed)abstract
    • The purpose was to study potential age ‐ related changes in the circulatory system via heart rate variability (HRV) by gradually lowering ambient temperature (0.2°C/min) from thermoneutral (32 C°) towards cold (18 C°). ECG was recorded from a young (31 years) and from an older subject (78 years), both males. During the tests, brachium blood pressure (BP) was recorded. During the cooling, BP increased in both subjects (young from 95/69 to 132/75 mmHg, old from 125/68 to 176/101 mmHg), the latter exhibiting a prominent rise in diastolic values after cooling. HRV parameters increased in both subjects during the cold exposure being modest in the younger subject as compared to the older one. Also, recovery from the cold in terms of HRV was faster in the younger subject. The present preliminary observations indicate that older age is coupled with altered HRV response to a mild whole‐body skin cooling.
  •  
4.
  • Dabaieh, Marwa, et al. (author)
  • A Comparative Monitoring Study of Indoor and Outdoor Heat Stress in Four Different Urban Typologies in Cairo
  • 2020
  • In: Planning Post Carbon Cities: 35th PLEA Conference on Passive and Low Energy Architecture, A Coruña, 1st-3rd September 2020: Proceedings. - : University of A Coruna and Asoc. - 9788497497947 ; , s. 1161-1166
  • Conference paper (peer-reviewed)abstract
    • Rapid urbanization and increasing heat exposure from climate change in combination with the urban heat island effect has become a contemporary pervasive threat to human health. We monitored four urban typologies with temperature and humidity sensors during the 2015 summer peak in Cairo, Egypt to evaluate which typologies could potentially reduce adverse impacts on human health. Our mixed methods approach included qualitative surveys to gauge how people perceived heat stress.  While our monitoring revealed that indoor temperatures were cooler by 1.64°C in the low-density typology relative to outdoor temperatures, the minor indoor temperature differences revealed that building envelopes had little impact on protecting inhabitants.  The study points to the urgent need for more comprehensive empirical monitoring of indoor heat stress in urban areas. Future research would benefit from greater interdisciplinarity so that a more inclusive range of heat stress scenarios, particularly in urban areas in the Global South, can be anticipated, and thereby monitored, mitigated and potentially avoided in order to reduce human health insecurity impacts from climate change.  
  •  
5.
  • Delin, Mattias, et al. (author)
  • Ascending evacuation - Walking speed in stairs as a function of height
  • 2015
  • In: Human Behaviour in fire : 6th International Symposium - 6th International Symposium. - 9780993393303 ; , s. 155-160
  • Conference paper (peer-reviewed)abstract
    • During ascending evacuation in long stairs, there is reason to believe that factors such as fatigue, and change in human behaviour will influence the possibility of satisfactory evacuation and affect the ascending walking speed. Based on these assumption, a 2-year research project was initiated at Lund University. This paper gives a brief description of the project and highlight some initial findings according ascending walking speed and effects of fatigue.
  •  
6.
  •  
7.
  • Havenith, George, et al. (author)
  • A Database of Static Clothing Thermal Insulation and Vapor Permeability Values of Non-Western Ensembles for Use in ASHRAE Standard 55, ISO 7730 and ISO 9920
  • 2015
  • In: ASHRAE Transactions. - 2378-2129. ; 121:Part 1, s. 197-215
  • Journal article (peer-reviewed)abstract
    • Four different thermal manikins (male and female shapes)in three different laboratories (UK, Sweden, and China) were used to determine the clothing thermal insulation values of 52 non-Western, mainly indoor clothing ensembles in order to expand the existing clothing database for use with ANSI/ASHRAE Standard 55-2013, Thermal Environmental Conditions for Human Occupancy (ASHRAE 2013a), ISO Standard 7730-2005, Ergonomics of the Thermal Environment -- Analytical Determination and Interpretation of Thermal Comfort Using Calculation of the PMV and PPD Indices and LocalThermal Comfort Criteria (ISO 2005), and ISO Standard 9920-2009, Ergonomics of the Thermal Environment -- Estimation of Thermal Insulation and Water Vapour Resistance of a Clothing Ensemble (ISO 2009). Insulation values varied over manikins, which is attributed to their different shapes and the different fit of the clothing. The mean value over three manikins is reported (with standard deviation) to include this potential real-life variation in the results. The relation of the clothing surface area factor to intrinsic clothing insulation was found to be different from that published for Western clothing. Prediction equations for the clothing surface area factor fcl based on the new data had only limited predictive power, which,however, was also the case for those obtained in the past for Western clothing. This issue seems to be commonly overlooked, as the use of these prediction equations is widespread. It has to be concluded that reliable fcl values can only be obtained when they are actually measured, as in the present work. However, we suggest that the concept of the fcl factor for the non-Western clothing may not be appropriate and may require further attention in research, as wide-falling-robes and gowns do not match the cylindrical clothing and air layer model on which the fcl concept is based. In summary, the results provide an extensive database of insulation values of non-Western clothing that is expected to be a valuable addition to ASHRAE Standard 55-2013 (ASHRAE 2013a), ISO Standard 7730-2005 (ISO 2005), and ISO Standard 9920-2009 (ISO 2009).
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-10 of 32

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view