Inertia Support During Variable Wind Conditions

Wind variations are important to consider while designing inertia support strategies. A model has been evaluated but the findings should reflect issues with several control strategies utilizing a fixed inertia support pattern. Wind variability of 0.5 m/s from second to second is observed in real wind data. However, drastic changes in wind speed can occur within the duration of inertia support. An improved inertia control algorithm has been presented allowing a stable delivery of inertia support from variable speed wind turbines (VSWT) subjected to realistic wind conditions. The controller improves the previously presented inertia algorithm and smoothly transitions from a locked operation window to MPPT-operation. The impact of the utilized wind speed filter is described and its impact on the simulation found to be of great importance

Sustainable development in the municipality of Enköping : a discourse analysis

Uppsatsens syfte är dels att studera hur uppfattningen av begreppet hållbar utveckling i Enköpings kommun påverkar det praktiska arbetet och dels huruvida definitionen av begreppet förändras beroende på vilken praktik som ska utföras i kommunen. Syftet har således varit att undersöka hur hållbar utveckling både konstitueras av och konstituerar social praktik. Den teoretiska utgångspunkten för att förstå detta sammanhang har varit den kritiska diskursanalysen. För att bilda mig en uppfattning om hur man inom Enköpings kommun definierar och jobbar med hållbar utveckling har jag utfört kvalitativa interjuver med tre av kommunens tjänstemän. Dessa intervjuer har utgjort mitt empirska material och grunden för min analys. I studien framkommer det att uppfattningar om hållbar utveckling både påverkar och påverkas av den praktik som bedrivs i Enköpings kommun. Dessutom har jag kunnat urskilja att den kommunalekonomiska diskursen verkar ha intagit en hegemonisk position i förhållande till diskursen om hållbar utveckling inom Enköpings kommun.The aim of this paper is partly to study how the notion of sustainable development in the municipality of Enköping affects the practical work and partly whether the definition of sustainable development changes depending on what practice that is carried out in the municipality. The aim has thus been to study how sustainable development both constitutes and constitute social practice. The theoretical base to understand this link has been the critical discourse analysis. In order to get an idea of how one within the municipality of Enköping defines and works with sustainable development I have conducted qualitative interviews with three officials from the municipality. These interviews have produced my empirical material and have been the foundation for my analysis. In the study it emerges that notions about sustainable development both affect and affects the practice that is conducted within the municipality of Enköping. Furthermore I have been able to distinguish that the economical- municipality discourse seems to have taken a hegemonic position in relation to the discourse about sustainable development within the municipality of Enköping

Health economic evaluation of the Lund Integrated Medicines Management Model (LIMM) in elderly patients admitted to hospital.

To evaluate the cost effectiveness of a multidisciplinary team including a pharmacist for systematic medication review and reconciliation from admission to discharge at hospital among elderly patients (the Lund Integrated Medicines Management (LIMM)) in order to reduce drug-related readmissions and outpatient visits

Socialsekreterares arbetsmiljö : En kvalitativ studie sett ur enhetschefernas perspektiv

The aim of this study was to get a deeper understanding of how Unit Heads within the Swedish social services view the work environment of social workers in social welfare offices. The study was based on six social services Unit Heads from the southern part of Sweden. Semi structured interviews were used to examine what different factors affect the social workers in social welfare offices work environment, what the practical work carried out by the Unit Heads looks like and finally, how their leadership influences the work environment. Through the interviews it was identified that workload, resources, media, work group and leadership were five different key factors that the Unit Heads said had the biggest affect on the social workers in social welfare offices work environment. The analysis was based on three theoretical perspectives. Firstly, organizational theory was used to obtain a deeper understanding of the different factors affecting the work environment. Leadership theory was then used to see how the leadership influenced the work environment. Finally, Aaron Antonovsky's theory of "sense of coherence" was used to gain a understanding of the relations within the work group and also between the work group and the Unit Heads. The study found that one of the most important factors for the social workers in social welfare offices work environment was what kind of leadership the Unit Heads used to influence the social workers: and it was found that the Unit Heads describe themselves as transformational leaders with transactional influence

Quantifying the Role of Atmospheric Forcing in Ice Edge Retreat and Advance Including Wind-Wave Coupling

LONG-TERM GOALS: 1. Representing surface fluxes and ocean waves in coupled models in the Beaufort and Chukchi Seas. 2. Understand the physics of heat and mass transfer from the ocean to the atmosphere. 3. Improve forecasting of waves on the open ocean and in the marginal ice zone.Award Numbers: N0001413WX20830 (Guest) N0001413IP20046 (Fairall, Persson

Evaluation of Sampling Methods for Maturation Stage Determination in the European Eel Anguilla anguilla

Monitoring data is important in ecological research, but differences between and within areas or species in data collection methods could introduce bias in the analyses. Standardizing data collection is particularly important when monitoring migratory species that have a distribution that crosses several national borders. The European Eel Anguilla anguilla is an extreme example of such a species since it constitutes one stock across the entire distribution area. One important variable collected for the European Eel is maturation stage. This data is needed to monitor silver eel escapement to assess population trends. To determine maturation, data on length, weight, diameter of the eyes, and pectoral fin length are used to calculate Pankhurst eye index and Durif's silver index. In this study, we investigated effects of precision and interobserver variability on data collection relevant for maturation stage determination according to Pankhurst and Durif's indices. We found that eye diameter differed in size between the left and right eyes; however, the mean difference (0.19 mm) is probably an artifact of the large sample size (n = 16,977) and can be regarded as being within the measurement precision. Meanwhile, there was no significant difference in pectoral fin length. These results suggest that either side of the eel could be used without losing precision. Visually determined maturation stage classifications differed from those calculated with Pankhurst and Durif's indices but could still provide useful information; hence, it is recommended to collect this variable. Measurements performed using computer software generated greater precision than using calipers, which increased interobserver variability. Since the difference was relatively small and since computer analysis of images may not always be an option, measuring method can be decided based on the level of precision needed in each case. These suggested implementations can reduce observation bias and streamline the data collection used for stock assessments of the European Eel

Precision thinning - a comparison of optimal stand-level and pixel-level thinning

Precision forestry allows decision-making on tree level or pixel level, as compared to stand-level data. However, little is known about the importance of precision in thinning decisions and its long-term effects on within-stand variation, stand economy and growth. In this study, silviculture was optimized for Net Present Value (NPV) in 20 conifer-dominated forest stands in hemi-boreal southern Sweden. The precision-thinning approach, Precision Thinning (PT), is compared with a stand-level approach, Stand Level Thinning (SLT) that is optimized for the same criteria but based on stand-level data. The results suggest no substantial long-term benefit or drawback in implementing thinning decisions based on pixel-level data as compared to stand-level data when optimizing stand economy. The result variables NPV and Mean annual increment of living stem volume (MAI(net)) were not higher for PT than for SLT. The within-stand variation in basal area (m(2)/ha(-1)) was lower at the end of the rotation compared to the start of the simulation for both SLT and PT. At the end of the rotation, SLT had higher variation in basal area compared to PT. However, pixel-level information enables adapting the silviculture to the within-stand variation which may favour other forest management goals than strictly financial goals

Office of Naval Research (ONR), Arctic and Global Prediction Program Department Research Initiative (DRI), Sea State and Boundary Layer Physics of the Emerging Arctic Ocean Quantifying the Role of Atmospheric Forcing in Ice Edge Retreat and Advance Including Wind-Wave Coupling

LONG-TERM GOALS: 1. Representing surface fluxes and ocean waves in coupled models in the Beaufort and Chukchi Seas. 2. Understand the physics of heat and mass transfer from the ocean to the atmosphere. 3. Improve forecasting of waves on the open ocean and in the marginal ice zone.N0001413WX20830 (Guest) N0001413IP20046 (Fairall, Persson

Systemic inflammatory impact of periodontitis on acute coronary syndrome

Aim: A causative relationship between acute coronary syndrome (ACS) and periodontitis has yet to be defined. The aim of this study was to assess differences in levels of serum cytokines between individuals with or without ACS or periodontal comorbidity. Material and Methods: In a case–control study, individuals with ACS (78 individuals, 10.3% females) and matching healthy controls (78 individuals, 28.2% females) were included. Medical and dental examinations were performed to diagnose ACS and periodontitis. Serum levels of cytokines were assessed, using Luminex technology. Results: A diagnosis of periodontitis in the ACS and control group was diagnosed in 52.6% and 12.8% of the individuals, respectively. The unadjusted odds-ratio that individuals with ACS also had periodontitis was 7.5 (95% CI: 3.4, 16.8,