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- 저자 : Johannesson (검색결과 6 건)
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Exploring meal frequency and vegetable intake among immigrants 70 years or older in Sweden
Johannesson Julie,Gustafsson Susanne,Slinde Frode,Rothenberg Elisabet 한국식품연구원 2021 Journal of Ethnic Foods Vol.8 No.-
Earlier research regarding immigrants has shown that lifestyle and environmental factors are of importance for the risk of developing certain diseases. Food habits are one of these factors. As there is little research concerning immigrants and food habits, the aim of the present paper was to explore food habits operationalised as meal frequency and vegetable intake among a group of older immigrants in Sweden. Specifically, the following questions were explored: changes in food habits when migrating, missing food from the native country, gender differences in food habits and association between food habits and self-rated health and well-being.A total of 131 persons from the health-promoting study “Promoting Aging Migrants’ Capabilities” (PAMC) conducted in Gothenburg, Sweden, 2011–2014, were included in this exploratory secondary analysis of questionnaire data. Participants were 70 years or older, cognitively intact, and living in ordinary housing. They had all migrated to Sweden from Finland or the Western Balkan Region (Bosnia-Herzegovina, Croatia, Montenegro and Serbia). Descriptive statistics as well as binary logistic regression were used to answer the research questions. Forty-eight percent of the participants in PAMC reported that they had changed their food habits when migrating, and 17% considered that they missed certain foods from their native country. Most of the participants migrated to Sweden more than 20 years ago. There was a significant difference in self-rated health in favour of the male participants ( p = 0.02), but food habits, operationalised as meal frequency and vegetable intake, were not associated with self-rated health or life satisfaction. Men rated their health as better than women did, but food habits operationalised as meal frequency or vegetable intake, were not associated with self-rated health or life satisfaction. Results from this secondary analysis were affected by methodological shortcomings. Further studies to understand the role of food habits in relation to health in a migration context are desired. Trial registration : NCT01841853, Registered April 29, 2013. Retrospectively registered.
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On Thermal and State-of-Charge Balancing using Cascaded Multi-level Converters
Altaf, Faisal,Johannesson, Lars,Egardt, Bo The Korean Institute of Power Electronics 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.4
In this study, the simultaneous use of a multi-level converter (MLC) as a DC-motor drive and as an active battery cell balancer is investigated. MLCs allow each battery cell in a battery pack to be independently switched on and off, thereby enabling the potential non-uniform use of battery cells. By exploiting this property and the brake regeneration phases in the drive cycle, MLCs can balance both the state of charge (SoC) and temperature differences between cells, which are two known causes of battery wear, even without reciprocating the coolant flow inside the pack. The optimal control policy (OP) that considers both battery pack temperature and SoC dynamics is studied in detail based on the assumption that information on the state of each cell, the schedule of reciprocating air flow and the future driving profile are perfectly known. Results show that OP provides significant reductions in temperature and in SoC deviations compared with the uniform use of all cells even with uni-directional coolant flow. Thus, reciprocating coolant flow is a redundant function for a MLC-based cell balancer. A specific contribution of this paper is the derivation of a state-space electro-thermal model of a battery submodule for both uni-directional and reciprocating coolant flows under the switching action of MLC, resulting in OP being derived by the solution of a convex optimization problem.
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On Thermal and State-of-Charge Balancing using Cascaded Multi-level Converters
Faisal Altaf,Lars Johannesson,Bo Egardt 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.4
In this study, the simultaneous use of a multi-level converter (MLC) as a DC-motor drive and as an active battery cell balancer is investigated. MLCs allow each battery cell in a battery pack to be independently switched on and off, thereby enabling the potential non-uniform use of battery cells. By exploiting this property and the brake regeneration phases in the drive cycle, MLCs can balance both the state of charge (SoC) and temperature differences between cells, which are two known causes of battery wear, even without reciprocating the coolant flow inside the pack. The optimal control policy (OP) that considers both battery pack temperature and SoC dynamics is studied in detail based on the assumption that information on the state of each cell, the schedule of reciprocating air flow and the future driving profile are perfectly known. Results show that OP provides significant reductions in temperature and in SoC deviations compared with the uniform use of all cells even with uni-directional coolant flow. Thus, reciprocating coolant flow is a redundant function for a MLC-based cell balancer. A specific contribution of this paper is the derivation of a state-space electro-thermal model of a battery submodule for both uni-directional and reciprocating coolant flows under the switching action of MLC, resulting in OP being derived by the solution of a convex optimization problem.
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Anders Larsson,Elin Nilsson,Hans Kollberg,Marie Johannesson,Per-Erik Wej?ker,David Carlander 한국식품영양과학회 2007 Journal of medicinal food Vol.10 No.2
Immunotherapy with specific antibodies is an alternative to antibiotics for the prevention of infections in hu-mans and animals. We have used orally administered immunoglobulin Y (IgY) preparations, purified from eggs of hens im-munized with Pseudomonas aeruginosabacteria, to prevent pulmonary P. aeruginosainfections in a group of patients withcystic fibrosis (CF). Respiratory infections are major problems for CF patients because of the thick mucus in the airways, andchronic P. aeruginosalung infections occur in virtually all CF patients and cause morbidity and mortality. The IgY-treatedgroup had only 2.5 P. aeruginosa-positive sputum cultures per 100 months, and none of the IgY-treated patients becamechronically colonized with P. aeruginosa. In the control group, 13.7 of the cultures per 100 months were positive for P. aerug-inosa, and 24% of patients became chronically colonized with P. aeruginosa. The first enrolled patient in this study has nowbeen treated continuously for more than 10 years. During the first 8 years she only had four P. aeruginosa-positive cultures.After 8 years she became chronically infected, but still after 10 years the bacteria have not turned mucoid. No negative sideeffects of IgY treatment have been noted during these 10 years. To our knowledge this is the longest treatment with specificyolk antibodies for therapeutic purposes.
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