| 1. |
- Ahmad, Abdulbaghi, 1951-, et al.
(author)
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EMDR treatment for children with PTSD : Results of a randomized controlled trial
- 2007
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In: Nordic Journal of Psychiatry. - : Informa UK Limited. - 0803-9488 .- 1502-4725. ; 61:5, s. 349-354
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Journal article (peer-reviewed)abstract
- The objective of the study was to examine the efficacy of EMDR treatment for children with post-traumatic stress disorder ( PTSD) compared with untreated children in a waiting list control group (WLC) participating in a randomized controlled superiority trial (RCT). Thirty-three 6-16-year-old children with a DSM-IV diagnosis of PTSD were randomly assigned to eight weekly EMDR sessions or the WLC group. The Posttraumatic Stress Symptom Scale for Children (PTSS-C scale) was used in interviews with children to evaluate their symptoms and outcome. Post-treatment scores of the EMDR group were significantly lower than the WLC indicating improvement in total PTSS-C scores, PTSD-related symptom scale, and the subscales re-experiencing and avoidance among subjects in the EMDR group, while untreated children improved in PTSD-non-related symptom scale. The improvement in re-experiencing symptoms proved to be the most significant between-group difference over time. The results of the present exploratory study including a limited number of children with PTSD are encouraging and warrant further controlled studies of larger samples of children suffering from PTSD.
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| 2. |
- Johansson Niemelä, Birgitta, et al.
(author)
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Does Leg Lengthening Pose a Threat to a Child’s Mental Health? : An Interim Report one year after surgery
- 2007
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In: Journal of Pediatric Orthopaedics. - 0271-6798 .- 1539-2570. ; 27:6, s. 611-617
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Journal article (peer-reviewed)abstract
- Previous studies suggest that children react with functional and psychological disturbances after leg lengthening (LL). Long-term effects are not known, and there is a lack of prospective studies. The aim of this interim prospective study was to investigate the psychological impact of the Ilizarov technique on a sample of children 1 year after surgery. Methods: The subjects were 27 patients aged 6 to 16 years treated using the Ilizarov technique at the Pediatric Orthopaedic Department, Uppsala University Hospital, between 1997 and 2005. A control group of healthy children matched for age and sex were also included. Semistructured interviews and psychometric measures (anxiety, depression, self-esteem, behavior) were administered to patients and parents before surgery and 1 year after. Psychological measures were correlated with medical records (days of hospitalization, gained length, etc). The control group was examined at initial assessment only. Results: Before reconstructive surgery, the LL group had a significantly lower self-esteem compared with the control group. Aggressive behavior, attention and externalization problems, anxiety, and depression were significantly reduced after LL. Parents' state anxiety was also reduced. There were no differences in trait anxiety between the parents of patients and the parents of the control children. Conclusions: Patients reported pain, psychological discomfort, complications, and restrained function during LL. However, there were no adverse psychological effects at 1-year follow-up; rather, there were signs of improved mental health. No single psychological parameter could predict the outcome after LL.
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| 3. |
- Mousa, Elsayed, et al.
(author)
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Reduced Carbon Consumption and CO2 Emission at the Blast Furnace by Use of Briquettes Containing Torrefed Sawdust
- 2019
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In: Journal of Sustainable Metallurgy. - : Springer. - 2199-3823 .- 2199-3831. ; 5:3, s. 391-401
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Journal article (peer-reviewed)abstract
- Lowering the carbon consumption and fossil CO2emissions is a priority in blast furnace (BF) ironmaking. Renewablebiomass is one option that can play an important role in future low-carbon ironmaking particularly in the countries rich inbiomass resources. In this study, full-scale trials to investigate the impact of briquettes containing torrefied sawdust on theBF efficiency and process stability have been conducted. Briquettes containing 1.8% of torrefied pelletized sawdust (TPS),86.2% of steel mill residues, and 12% cement with sufficient mechanical strength have been produced on industrial scale. Thebio-briquettes were charged at two different rates: 37% ( ~ 39 kg/tHM) and 55% ( ~ 64 kg/tHM) bio-briquettes to the SSABBF No. 4 in Oxelösund. The gas utilization was higher during bio-briquette-charging periods without change in pressuredrop up to 55% bio-briquettes, indicating sustained shaft permeability. BF dust generation or properties did not change significantly.Measurements of the top gas composition using mass spectrometry did not indicate release of hydrocarbon fromTPS in connection to the charging of bio-briquettes. Evaluation of process data has been carried out using a heat and massbalance model. The evaluation of operational data in the model indicated lowering of thermal reserve zone temperature by45 °C and reduction in carbon consumption by ~ 10 kg/tHM when charging 55% bio-briquettes compared to the referencecase. The total CO2emission was reduced by about 33–40 kg/tHM when using 55% bio-briquettes.
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| 4. |
- Sundqvist Ökvist, Lena, et al.
(author)
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Low CO2 ironmaking in the blast furnace : Roheisenerzeugung im Hochofen mit niedrigen CO2 Emissionen
- 2017
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In: Stahl und Eisen (1881). - : Verlag Stahleisen. - 0340-4803. ; 137:9, s. 29-37
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Journal article (peer-reviewed)abstract
- The steel industry contributes to the global emissions of fossil CO2 by ~ 7 %, mainly related to coal and coke used in the BF. At the same time the BF is, and will be in a foreseeable future, the most energy efficient method for ore based hot metal production. Several R&D teams have investigated concepts to minimise CO2 emission as e.g. the ULCOS top gas recycling BF, high injection of H2, use of bio-mass products and HBI. In this paper these different options, and in some cases combination of these are analysed relative the BF conditions and their possible impacts on fossil CO2 emission are compared.
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| 5. |
- Sundqvist Ökvist, Lena, et al.
(author)
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Low CO2 ironmaking in the blast furnace
- 2017
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In: Stahl und Eisen (1881). - : Verlag Stahleisen GmbH. - 0340-4803. ; 137:9, s. 29-37
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Journal article (peer-reviewed)abstract
- The steel industry contributes to the global emissions of fossil CO2 by around 7 %, mainly related to coal and coke used in the BF. At the same time the BF is, and will be in a foreseeable future, the most energy efficient method for ore based hot metal production. Several R&D teams have investigated concepts to minimize CO2 emission as e. g. the ULCOS top gas recycling BF, high injection of H2, use of bio-mass products and HBI. In this paper these different options, and in some cases combination of these are analyzed relative the BF conditions and their possible impacts on fossil CO2 emission are compared.
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| 6. |
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| 7. |
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| 8. |
- Swartling, Maria, et al.
(author)
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Experimentally determined temperatures in blast furnace hearth
- 2010
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In: Ironmaking & steelmaking. - 0301-9233 .- 1743-2812. ; 37:1, s. 21-26
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Journal article (peer-reviewed)abstract
- In this study temperature measurements have been carried out at blast furnace no. 2 at SSAB Oxelosund. The temperature was measured in the hearth lining and at the outer surfaces of the hearth wall and bottom. The lining temperature was measured using permanently installed thermocouples and surface temperatures were measured using a hand held thermocouple. The aims of the study were to find a correlation between lining and surface temperatures as well as to find a method to determine the surface temperature based on readings from lining thermocouples. The overall conclusion is that the bottom and wall surface temperatures can be determined based on lining temperatures.
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| 9. |
- Swartling, Maria, et al.
(author)
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Heat Transfer Modelling of a Blast Furnace Hearth
- 2010
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In: STEEL RES INT. - : Wiley. - 1611-3683. ; 81:3, s. 186-196
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Journal article (peer-reviewed)abstract
- This paper describes the development of a heat transfer model with the purpose of studying the heat flows in the hearth of an operating blast furnace. Temperature profiles were calculated for a period of time to study the transition from steady blast furnace operation to an unsteady period, and back to a steady period. This total time period had the highest lining temperatures registered since the beginning of the current campaign. It was concluded that no part of the lining had an inner temperature higher than the critical temperature of 1150 degrees C. Thus, no refractory could have been in direct contact with slag or iron. The corner between the wall and the bottom was identified to be the most sensitive part of the lining. It is suggested that thermocouples are installed in this area, to improve the temperature control.
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| 10. |
- Swartling, Maria, et al.
(author)
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Heat Transfer Study of Blast Furnace 2 at SSAB Oxelösund
- 2009
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In: Journal of Iron and Steel Research International. - 1006-706X .- 2210-3988. ; 16:Part 2 Suppl. 2, s. 1131-1136, s. 1131-1136
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Journal article (peer-reviewed)abstract
- This paper presents a heat transfer study, based on the actual conditions of the hearth of Blast Furnace 2 at SSAB Oxelosund in Sweden. Initially, an experimental study was carried out. The temperature of the cold surfaces of the bottom and wall lining were measured with a hand-held thermocouple. The aim of the overall study was to find a method to determine the outer surface temperature, based on lining temperature readings from permanently installed thermocouples. A heat transfer model was developed, using the established correlations from the experimental study as boundary conditions. With the model, it is possible to calculate a complete two-dimensional temperature profile of the hearth lining at any given time. The permanently installed thermocouples are used to validate the model, by comparing calculated and measured temperatures; the accuracy of the model is plus/minus 3 degrees difference.
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| 11. |
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| 12. |
- Westin, Marcus, 1965-
(author)
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Health and Healthcare Utilization Among Swedish Single Parent Families
- 2007
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Doctoral thesis (other academic/artistic)abstract
- One of the most vulnerable groups in Swedish society today is single parent families, a group that has increased over the last thirty years in proportion to married and cohabiting parents. The aims of this thesis are to study inequality and inequity in health and health care utilization with regard to whether parents are single or couple (married/cohabiting), to investigate whether the concept of social capital may provide us with further understanding when analyzing inequality and inequity in health and to investigate how the mental health of single parent children may differ from couple parent children and to what extent this difference may be due to parental socio-economic and socio-demographic characteristics, including social capital. The results from the papers on which this thesis is based indicate that both single mothers and single fathers have poorer health than couple mothers and fathers. Single mothers also refrain from seeking medical care to a greater extent. The financial advantage of single fathers, in comparison with single mothers, might have an impact on their medical care utilization, since they seemingly seek and consume health care to an extent that matches their poorer health. Social capital has as robust an association with self-rated health as any traditional social determinant of health. Four parental characteristics were found to be independently associated with children’s mental health; being a single parent, ‘poor parental health’, limited social support and low levels of social capital. The uneven distribution of all investigated determinants of health, including social capital, gives us reason to conclude that our findings indeed raise concerns about equity. Action taken by society to enable single parents to increase their social capital might improve their and their children’s health. It may also be clearly stated that financial status has a major impact on both health and health care utilization. This particular characteristic is also rather accessible to alteration, for example through financial transfers between groups in society.
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| 13. |
- Zetterholm, Jonas, et al.
(author)
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Dynamic modelling for the hot blast stove
- 2017
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In: Applied Energy. - : Elsevier BV. - 0306-2619 .- 1872-9118. ; 185, s. 2142-2150
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Journal article (peer-reviewed)abstract
- A large amount of energy is required in the production of steel where the preheating of blast in the hot blast stoves for iron-making is one of the most energy-intensive processes. To improve the energy efficiency of the steelmaking it is necessary to investigate how to improve the hot blast stove operation. In this work a mathematic model for evaluating the performance of the hot blast stove was developed using a finite difference approximation for the heat transfer inside the stove during operation. The developed model was calibrated and validated by using the process data from hot blast stove V26 at SSABs plant in Oxelösund, Sweden. The investigation shows a good agreement between the measured and modelled data. As a case study, the developed model was used to simulate the effect of a new concept of OxyFuel technique to hot blast stoves. The investigation shows that, by using this OxyFuel technique, it is possible to maintain the blast temperature while removing the usage of coke oven gas (COG). The saved COG can be used to replace some fossil fuel, such as oil and LPG. Furthermore, the effect of the cycle time on the single stove was studied. As expected, both the hot blast and flue gas temperatures are increased when increasing the cycle time. This shows that it is a good strategy for the hot blast stove to increase the blast temperature if the stove is currently not operated with the maximum allowed flue-gas temperature.
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| 14. |
- Ökvist, Lena Sundqvist, et al.
(author)
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Low-CO2 iornmaking in the blast furnace
- 2017
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In: AISTech - Iron and Steel Technology Conference Proceedings. - 9781935117643 ; , s. 455-463
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Conference paper (peer-reviewed)
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