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| 2. |
- Bengtsson, Rikard, et al.
(författare)
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Det europeiska projektet : Politik och juridik, historia och framtid
- 2013
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Understanding the European Union - where it has its roots and how it works - is not the easiest thing. Nevertheless, it is an absolutely necessary knowledge to acquire in order as an individual to be able to navigate in today's Europe. Understanding the European Union - where it has its roots and how it works - is not the easiest thing. Nevertheless, it is an absolutely necessary knowledge to acquire in order to be able to navigate in today's Europe as an individual.The purpose of this book is to describe, make understandable and analyze the European project - the EU. The book is multidisciplinary in that both historical and legal as well as political science perspectives have guided the layout and presentation. Thanks to these different disciplinary approaches, the book provides a versatile and nuanced picture of the EU's genesis, growth and functioning.The book is divided into four parts covering different aspects of the European Union:- A historical part that gives the European present and the future a foundation to stand on.- A part that describes, analyzes and explains the EU as a political system.- A part with a focus on the EU as a legal system and the EU as a legal system.- A section that addresses and discusses how we should understand the EU's actions in an increasingly globalized world.
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| 4. |
- Bodin, Hristina, 1977-
(författare)
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Wastewater treatment in constructed wetlands : Effects of vegetation, hydraulics and data analysis methods
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Degradation of water resources has become one of the most pressing global concerns currently facing mankind. Constructed Wetlands (CWs) represent a concept to combat deterioration of water resources by acting as buffers between wastewater and receiving water bodies. Still, constructing wetlands for the sole purpose of wastewater treatment is a challenging task. To contribute to this research area, the fundamental question raised in this doctorate thesis was: how do factors such as vegetation and residing water movements (hydraulics) influence wastewater treatment in CWs? Also, effects of different data analysis methods for results of CW hydraulics and wastewater treatment were investigated. Research was focused on phosphorus (P), ammonium-nitrogen (NH4+-N) and solids (TSS) in wastewater and o n P in macrophyte biomass. Studies were performed in pilot-scale free water surface (FWS) CW systems in Kenya (Chemelil) and Sweden (Halmstad) and as computer simulations.Results from the Chemelil CWs demonstrated that meeting effluent concentration standards simultaneously for all water quality parameters in one CW was difficult. Vegetation harvest, and thus nutrient uptake by young growing macrophytes, was important for maintaining low effluents of NH4+-N and P, especially during dry seasons. On the other hand, mature and dense vegetation growing for at least 4 months secured meeting TSS standards. Phosphorus in above-ground green biomass accounted for almost 1/3 of the total P mass removal, demonstrating high potential for P removal through macrophyte harvest in CWs. Also, results suggested that harvest should be species-specific to achieve high P removal by macrophytes and overall acceptable wastewater treatment in CWs. Still, different methods to estimate evapotranspiration (ET) from the Chemelil CWs showed that water balance calculations greatly impacted estimations of wastewater treatment results.Hydraulic tracer studies performed in the Chemelil and Halmstad CWs showed that mature and dense emergent vegetation in CWs could reduce effective treatment volumes (e-values), which emphasized the importance of regulating this type of vegetation. Also, it was shown that hydraulic tracer studies with lithium chloride performed in CWs with dense emergent vegetation had problems with low tracer recoveries. This problem could be reduced by promoting the distribution of incoming tracer solution into the CW using a barrier near the CW inlet pipe. Computer simulation results showed that the choice of tracer data analysis method greatly influenced quantifications of CW hydraulics and pollutant removal. The e-value could be 50% higher and the pollutant removal 13% higher depending upon used method. Moreover, unrealistic evalues (above 100%) in published literature could to some extent be explained by tracer data analysis method. Hence, to obtain more reliable hydraulic data and wastewater treatment results from CWs, more attention should be paid to the choice of tracer data analysis method.
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- Bogatic, Wirginia, 1969-
(författare)
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Exilens dilemma: att stanna eller att återvända : Beslut i Sverige av polska kvinnor som överlevde KZ-lägret Ravensbrück och räddades till Sverige 1945-1947
- 2010
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis is about the intersection of great narratives and individual decisions. In the intersection, the dilemma of exile is discussed: to remain in exile or return to one’s homeland. The decision to remain or return was made by the surviving Polish female concentration camp prisoners that were brought back to Sweden in 1945 with the Red Cross rescue operation.The women’s decisions have been contextualized by being placed against the political, social and economic upheavals that took place primarily in Poland, but also partly in Sweden, as well as in the international environment with which the new Poland had to form a relationship following the Second World War.The thesis moves between three levels: the micro level, comprising the individuals, their choices and experiences; the macro level, including the surrounding social, economic and political structures; the meso level, which merges the individual, her network and the state. The theoretical framework is on the one hand based on Reinhart Koselleck’s concepts of “realm of experience” and “expectations” that structure the time horizon and refer to the universal, and on the other hand, the sociological concept of generations and Svante Lundberg's model of exile with the concepts of Circumstance, Frame and Meaning. Both Koselleck and Lundberg focus on the individual / group and structural context. Sources used have been material from the Swedish Government and the two Polish governments and their agencies. In addition, a number of Polish and Swedish newspapers published during the period 1945-1947 as well as material from the Polish Source Institute in Lund (PIZ) have been studied. Thirteen in-depth interviews with the surviving women (both in Poland and Sweden) have been carried out, resulting in so-called life stories, with the objective of providing an answer to the question of why some of them remained in Sweden after the war while others returned to Poland. In the women's life stories, some themes can be distinguished: the common realm of experience, being adherent to the same sociological generation with a manifest collective memory (which in part developed differently depending on their decisions to remain or return), a link between war and captivity and expectations for the future. Otherwise, the life stories highlight the women's construction of identity, which is affected by growing up in the between-war Poland, the time during World War II and the occupation. It also reveals that these experiences influenced their decision: remaining and returning.
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| 6. |
- Bornefalk, Hans, et al.
(författare)
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Effect of Temperature Variation on the Energy Response of a Photon Counting Silicon CT Detector
- 2013
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Ingår i: IEEE Transactions on Nuclear Science. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9499 .- 1558-1578. ; 60:2, s. 1442-1449
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Tidskriftsartikel (refereegranskat)abstract
- The effect of temperature variation on pulse height determination accuracy is determined for a photon counting multibin silicon detector developed for spectral CT. Theoretical predictions of the temperature coefficient of the gain and offset are similar to values derived from synchrotron radiation measurements in a temperature controlled environment. By means of statistical modeling, we conclude that temperature changes affect all channels equally and with separate effects on gain and threshold offset. The combined effect of a 1 degrees C temperature increase is to decrease the detected energy by 0.1 keV for events depositing 30 keV. For the electronic noise, no statistically significant temperature effect was discernible in the data set, although theory predicts a weak dependence. The method is applicable to all x-ray detectors operating in pulse mode.
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| 7. |
- Brunner, I., et al.
(författare)
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Fine-root turnover rates of European forests revisited: an analysis of data from sequential coring and ingrowth cores
- 2013
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Ingår i: Plant and Soil. - : Springer Netherlands. - 0032-079X .- 1573-5036. ; 362:1-2, s. 357-372
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Tidskriftsartikel (refereegranskat)abstract
- Background and Aims Forest trees directly contribute to carbon cycling in forest soils through the turnover of their fine roots. In this study we aimed to calculate root turnover rates of common European forest tree species and to compare them with most frequently published values. Methods We compiled available European data and applied various turnover rate calculation methods to the resulting database. We used Decision Matrix and Maximum-Minimum formula as suggested in the literature. Results Mean turnover rates obtained by the combination of sequential coring and Decision Matrix were 0.86 yr−1 for Fagus sylvatica and 0.88 yr−1 for Picea abies when maximum biomass data were used for the calculation, and 1.11 yr−1 for both species when mean biomass data were used. Using mean biomass rather than maximum resulted in about 30 % higher values of root turnover. Using the Decision Matrix to calculate turnover rate doubled the rates when compared to the Maximum-Minimum formula. The Decision Matrix, however, makes use of more input information than the Maximum-Minimum formula. Conclusions We propose that calculations using the Decision Matrix with mean biomass give the most reliable estimates of root turnover rates in European forests and should preferentially be used in models and C reporting.
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| 8. |
- Cederlund, Ella, et al.
(författare)
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Characterization of new medium-chain alcohol dehydrogenases adds resolution to duplications of the class I/III and the sub-class I genes
- 2011
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Ingår i: Chemico-Biological Interactions. - : Elsevier Science B.V., Amsterdam.. - 0009-2797 .- 1872-7786. ; 191:03-jan
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Tidskriftsartikel (refereegranskat)abstract
- Four additional variants of alcohol and aldehyde dehydrogenases have been purified and functionally characterized, and their primary structures have been determined. The results allow conclusions about the structural and evolutionary relationships within the large family of MDR alcohol dehydrogenases from characterizations of the pigeon (Columba livia) and dogfish (Scyliorhinus canicula) major liver alcohol dehydrogenases. The pigeon enzyme turns out to be of class I type and the dogfish enzyme of class III type. This result gives a third type of evidence, based on purifications and enzyme characterization in lower vertebrates, that the classical liver alcohol dehydrogenase originated by a gene duplication early in the evolution of vertebrates. It is discernable as the major liver form at about the level in-between cartilaginous and osseous fish. The results also show early divergence within the avian orders. Structures were determined by Edman degradations, making it appropriate to acknowledge the methodological contributions of Pehr Edman during the 65 years since his thesis at Karolinska Institutet, where also the present analyses were performed.
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| 9. |
- Cinthio, Magnus, et al.
(författare)
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A Method for Arterial Diameter Change Measurements Using Ultrasonic B-Mode Data.
- 2010
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Ingår i: Ultrasound in Medicine and Biology. - : Elsevier BV. - 0301-5629. ; 36:9, s. 1504-1512
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Tidskriftsartikel (refereegranskat)abstract
- Arterial diameter change is related to distending blood pressure and is used in estimation of arterial stiffness parameters. A common technique to track the arterial walls is by integration of wall velocities estimated by different methods using cross correlation or tissue Doppler. However, because of the high pulse repetition frequency and the need for separate pulsing sequences, the B-mode image quality is affected. We have previously developed a fast algorithm for direct measurement of lumen diameter using B-mode images. In this study we have improved the technique to be more robust and also implemented measurements of diameter change, maximum differential wall velocity and relative diameter change of the common carotid artery noninvasively in vivo. The influence of the lateral width of the region of interest (ROI; 1 pixel, 0.1 mm, 0.5 mm, 1 mm, 2.5 mm and 5 mm) was evaluated. Using the optimal lateral width (2.5 mm), the systematic and random differences between two consecutive measurements were 21 mum and 105 mum, respectively, for lumen diameter measurement; -7 mum and 39 mum, respectively, for lumen diameter change measurements; -0.2 mm/s and 0.9 mm/s, respectively, for maximum relative wall velocity; and -0.2 % and 0.8 %, respectively, for measurements of the relative diameter change. The coefficient of variation (CV) was 1.9%, 5.2%, 7.9% and 6.0%, respectively. The study indicates that the reproducibility is sufficient for in vivo studies when the width of the ROI is 1.0 mm or wider. (E-mail: magnus.cinthio@elmat.lth.se).
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| 10. |
- Cinthio, Magnus, et al.
(författare)
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An automatic method for measurements of arterial intima-media thickness using ultrasonic B-mode data
- 2012
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Ingår i: Acoustical Imaging. - Dordrecht : Springer Netherlands. - 9789400726185 - 9789400726192 ; 31, s. 115-122
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We have previously developed algorithms that use B-mode cineloops for simultaneous measurements of arterial diameter change and longitudinal movement of the arterial wall. In this study the lumen diameter algorithm was extended to also measure arterial intima-media thickness of the far wall. To optimize the algorithm the influence of the lateral width of the region-of-interest (1 pixel, 0.1 mm, 0.5 mm, 1 mm, 2.5 mm and 5 mm) was evaluated. The algorithm estimated intima-media thickness at diastole automatically by measuring the distance between the two positions where the laterally averaged B-mode intensity envelope crosses a threshold value relative to the maximum amplitudes of the intimal and adventitial echoes, respectively. The sub-pixel resolution is achieved by solving the equation of a straight line between the two samples on either side of the threshold value. The measurements were performed on 20 healthy normotensive volunteers (age 25–57 years) on the common carotid artery 2–3 cm proximal to the bifurcation. For the 2.5-mm width, which was considered the best, the intima-media thickness was mean 646 μm (SD 66) for men and 613 μm (SD 68) for women. The systematic difference was −5 μm and the random difference was 31 μm. The CV was 4.9%. The study indicates that the reproducibility is sufficient for in vivo studies when the width of the region-of-interest is 1.0 mm or wider.
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