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Sökning: WFRF:(Lundgren Kownacki Karin)

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  • Lundgren-Kownacki, Karin, et al. (författare)
  • Climate change-induced heat risks for migrant populations working at brick kilns in India : a transdisciplinary approach
  • 2018
  • Ingår i: International Journal of Biometeorology. - : Springer. - 0020-7128 .- 1432-1254. ; 62:3, s. 347-358
  • Tidskriftsartikel (refereegranskat)abstract
    • During the summer of 2015, India was hit by a scorching heat wave that melted pavements in Delhi and caused thousands of deaths, mainly among the most marginalized populations. One such group facing growing heat risks from both occupational and meteorological causes are migrant brick kiln workers. This study evaluates both current heat risks and the potential future impacts of heat caused by climate change, for the people working at brick kilns in India. A case study of heat stress faced by people working at brick kilns near Chennai, India, is the anchor point around which a transdisciplinary approach was applied. Around Chennai, the situation is alarming since occupational heat exposure in the hot season from March to July is already at the upper limits of what humans can tolerate before risking serious impairment. The aim of the study was to identify new pathways for change and soft solutions by both reframing the problem and expanding the solution space being considered in order to improve the quality of life for the migrant populations at the brick kilns. Technical solutions evaluated include the use of sun-dried mud bricks and other locally “appropriate technologies” that could mitigate the worsening of climate change-induced heat. Socio-cultural solutions discussed for empowering the people who work at the brick kilns include participatory approaches such as open re-localization, and rights-based approaches including the environmental sustainability and the human rights-based approach framework. Our analysis suggests that an integrative, transdisciplinary approach could incorporate a more holistic range of technical and socio-culturally informed solutions in order to protect the health of people threatened by India’s brick kiln industry.
  • Lundgren-Kownacki, K., et al. (författare)
  • Exploring how a traditional diluted yoghurt drink may mitigate heat strain during medium-intensity intermittent work: a multidisciplinary study of occupational heat strain
  • 2018
  • Ingår i: Industrial Health. - : National Institute of Occupational Safety and Health, Japan. - 0019-8366. ; 56:2, s. 106-121
  • Tidskriftsartikel (refereegranskat)abstract
    • It is common practice in India to consume the dairy drink buttermilk as a way of mitigating occupational heat strain. This paper explores the thermoregulatory and hydration benefits of drinking buttermilk but also the impacts of work in a hot environment on the gut microbiota, renal and cognitive function. Twelve healthy participants were subjected to a 3-h period of medium load physical intermittent work in a climatic chamber (34 degrees C, 60% RH). The subjects were given water, buttermilk (700 ml) or no rehydration at random. Mean body temperatures when no rehydration was given were significantly higher (p <= 0.001). When subjects drank water or buttermilk they had a lower sweat rate than with no rehydration (p <= 0.05) and the perception of feeling hot, uncomfortable, thirsty and physically exerted was significantly reduced (p <= 0.05). A hormonal stress response at the end of the exposure was seen when not drinking (p <= 0.05). No differences in cognitive abilities and gut microbiota were found. The exposure lowered the renal blood flow suggesting an acute impact of short term heat exposure. It was also found that buttermilk has a protective effect on this impact. Our results demonstrated that keeping hydrated by water/buttermilk consumption mitigates heat strain in well-nourished subjects.
  • Lundgren Kownacki, Karin, et al. (författare)
  • Sustainability Challenges from Climate Change and Air Conditioning Use in Urban Areas
  • 2013
  • Ingår i: Sustainability. - : MDPI AG. - 2071-1050. ; 5:7, s. 3116-3128
  • Tidskriftsartikel (refereegranskat)abstract
    • Global climate change increases heat loads in urban areas causing health and productivity risks for millions of people. Inhabitants in tropical and subtropical urban areas are at especial risk due to high population density, already high temperatures, and temperature increases due to climate change. Air conditioning is growing rapidly, especially in South and South-East Asia due to income growth and the need to protect from high heat exposures. Studies have linked increased total hourly electricity use to outdoor temperatures and humidity; modeled future predictions when facing additional heat due to climate change, related air conditioning with increased street level heat and estimated future air conditioning use in major urban areas. However, global and localized studies linking climate variables with air conditioning alone are lacking. More research and detailed data is needed looking at the effects of increasing air conditioning use, electricity consumption, climate change and interactions with the urban heat island effect. Climate change mitigation, for example using renewable energy sources, particularly photovoltaic electricity generation, to power air conditioning, and other sustainable methods to reduce heat exposure are needed to make future urban areas more climate resilient.
  • Ahlberg, Erik, et al. (författare)
  • "Vi klimatforskare stödjer Greta och skolungdomarna"
  • Ingår i: Dagens nyheter (DN debatt). - 1101-2447.
  • Tidskriftsartikel (populärvet., debatt m.m.)abstract
    • DN DEBATT 15/3. Sedan industrialiseringens början har vi använt omkring fyra femtedelar av den mängd fossilt kol som får förbrännas för att vi ska klara Parisavtalet. Vi har bara en femtedel kvar och det är bråttom att kraftigt reducera utsläppen. Det har Greta Thunberg och de strejkande ungdomarna förstått. Därför stödjer vi deras krav, skriver 270 klimatforskare.
  • Kuklane, Kalev, et al. (författare)
  • Evaluation of BARRIER® EasyWarm on Healthy Volunteers in Three Different Climates and Verification of the Degree of Correlation Between Tests Performed on Healthy Volunteers and in a standardized bench test
  • 2015
  • Rapport (övrigt vetenskapligt)abstract
    • INTRODUCTION Anaesthesia induced hypothermia is a common serious but preventable condition associated with increased bleeding and blood transfusion, increased risk for surgical site infections and increased risk for morbid cardiac events. Active warming is effective in preventing hypothermia but there is a need for more easy to use cost-effective products making active warming available to more patients. Establishing how the environment affects skin temperature and total body heat content (TBHC) as well as the correlation between standardized bench tests and healthy volunteer skin temperature is an important aspect in developing new, more effective warming products to prevent or treat hypothermia as this means fewer healthy volunteers are needed as changes to skin temperature could be estimated based on data from bench tests. OBJECTIVES This investigation was undertaken in order to investigate the safety and efficacy of Active warming with BARRIER® EasyWarm when used in three different climate settings and using different test methods; standardized bench test T-1127 measuring temperatures on a wooden board and measuring skin and core temperature on healthy volunteers. An additional objective in this investigation was to determine the degree of correlation between these test methods. OUTCOME A statistically significant increase in TBHC is seen when comparing TBHC over time in all three climates, respectively. With this investigation design we cannot show that there is a difference in TBHC between the different climates though, i.e. the heat generated from the blanket to the subject is not significantly different in the different climates. Based on this investigation the active warming blanket managed to maintain or increase the temperature of the subjects without any adverse thermal effects. Thermal comfort and the mean thermal sensation were maintained between slightly cold and warm throughout the whole exposure length. The active self-warming blanket was well tolerated in healthy male volunteers. None of the six Adverse Events (AE) reported were serious and none of them were related to the investigational device but rather to the immobilisation or the tension of participating in the investigation. All AEs were resolved at end of test. Skin temperature reached maximally 42.2°C, and thus, it never reached the lowest pain threshold of 43°C under any conditions. Increase of core temperature over time in climate 18°C and 24°C was in average 0.1°C to 0.2°C leading to mean final core temperatures of 36.9 (SD 0.2) and 37.1 (SD 0.4) °C for 18°C and 24°C exposures, respectively.
  • Alametsä, Jarmo, et al. (författare)
  • Age-related circulatory responses to whole body cooling: observations by ballistocardiographic EMFi sensors
  • 2014
  • Ingår i: Ambience14 & 10I3M, Scientific conference for Smart and functional textiles, Well-Being, Thermal comfort in clothing, Design, Thermal Manikins and Modelling,Tampere Hall, Tampere, Finland,2014-09-07 - 2014-09-09. - : Tampere University of Technology. ; 1
  • Konferensbidrag (refereegranskat)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.
  • Alametsä, Jarmo, et al. (författare)
  • Age‐related circulatory responses to whole body cooling: observations by heart rate variability
  • 2015
  • Ingår i: Finnish Journal of eHealth and eWelfare. - 1798-0798. ; 7:2-3, s. 57-64
  • Tidskriftsartikel (refereegranskat)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.
  • Delin, Mattias, et al. (författare)
  • Ascending evacuation - Walking speed in stairs as a function of height
  • 2015
  • Ingår i: International symposium on Human Behaviour in Fire, 2015,Cambridge, United Kingdom,2015-09-28 - 2015-09-30. - : Interscience Communications. ; , s. 155-160
  • Konferensbidrag (refereegranskat)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.
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