| 1. |
- Ahlberg, Erik, et al.
(författare)
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Secondary organic aerosol from VOC mixtures in an oxidation flow reactor
- 2017
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Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310. ; 161, s. 210-220
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Tidskriftsartikel (refereegranskat)abstract
- The atmospheric organic aerosol is a tremendously complex system in terms of chemical content. Models generally treat the mixtures as ideal, something which has been questioned owing to model-measurement discrepancies. We used an oxidation flow reactor to produce secondary organic aerosol (SOA) mixtures containing oxidation products of biogenic (α-pinene, myrcene and isoprene) and anthropogenic (m-xylene) volatile organic compounds (VOCs). The resulting volume concentration and chemical composition was measured using a scanning mobility particle sizer (SMPS) and a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS), respectively. The SOA mass yield of the mixtures was compared to a partitioning model constructed from single VOC experiments. The single VOC SOA mass yields with no wall-loss correction applied are comparable to previous experiments. In the mixtures containing myrcene a higher yield than expected was produced. We attribute this to an increased condensation sink, arising from myrcene producing a significantly higher number of nucleation particles compared to the other precursors. Isoprene did not produce much mass in single VOC experiments but contributed to the mass of the mixtures. The effect of high concentrations of isoprene on the OH exposure was found to be small, even at OH reactivities that previously have been reported to significantly suppress OH exposures in oxidation flow reactors. Furthermore, isoprene shifted the particle size distribution of mixtures towards larger sizes, which could be due to a change in oxidant dynamics inside the reactor.
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| 2. |
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| 3. |
- Hanson, Helena I., et al.
(författare)
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Gardens’ contribution to people and urban green space
- 2021
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Ingår i: Urban Forestry and Urban Greening. - : Elsevier BV. - 1618-8667. ; 63
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Tidskriftsartikel (refereegranskat)abstract
- Cities are experiencing numerous challenges, adversely affecting human health and wellbeing. Urban green space provides ecosystem services that are important to meet urban challenges. One type of urban green space is private gardens (yards) that make up an essential part of many urban areas. Gardens can support urban biodiversity and provide cultural ecosystem services (CES) to its owner. However, the provision of garden benefits depends on garden size, design and management. This study aims to explore private gardens contribution to urban biodiversity and garden owners’ wellbeing (in terms of CES), and to understand the influence of urban planning and garden design and management. We use a conceptual framework to illustrate complexities and interlinkages: the garden ‘human-nature’ nexus. The study is based on a garden land-use inventory and interviews with 35 garden owners in Lund, Sweden. Results show that urban development influence garden's biodiversity potential by limiting available space or garden vegetation. New properties were mainly covered by buildings and paved surfaces and their small gardens contained few biodiversity features and large trees. Garden owners used multiple information channels to gain inspiration and knowledge, and aesthetic and edibility are important plant qualities governing garden plant choice. Many garden owners experienced gardens problems that influence design and management. The most important garden CES were social bonds, recreation, nature experiences and relaxation. Age and gender influence both garden CES and garden design and management. We conclude that private gardens have a potential to function as multifunctional spaces, but to harness their full potential there is a need to transform how we plan, develop, manage and not at least recognize private green space. We argue that the garden ‘human-nature’ nexus can help to illustrate the important interlinkages existing between e.g. urban planning, biodiversity and garden ES, and to foster sustainable urban green space governance.
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| 4. |
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| 5. |
- Adler, Jeremy, et al.
(författare)
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Noise and colocalization in fluorescence microscopy: solving a problem
- 2008
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Ingår i: Microscopy and Analysis. ; 22:5, s. 7-10
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Forskningsöversikt (övrigt vetenskapligt/konstnärligt)abstract
- The Pearson correlation coefficient (PCC) is regularly used in colocalization measurements, but it is sensitive to image noise. Images of fluorophores are usually degraded by Poisson and background noise and we have found that, even with apparently high quality images, the measured PCC is substantially understated, to the extent that the numbers become misleading. This means that ostensibly significant differences in the PCC between two populations may just reflect differing image quality while dissimilar levels of noise may mask significant differences. A new correction, based on measurements of image quality, derived from a pair of images for each fluorophore, aligns the measured PCC with the true PCC. Our method, the Replicate Based Noise Corrected Correlation (RBNCC), generates an accurate PCC even from poor images. It is highly photon efficient and therefore well suited for use in live cell fluorescence imaging or with rapidly bleaching fluorophores.
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| 6. |
- Ahlberg, Mona, 1966-, et al.
(författare)
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Family Health Conversations create awareness of family functioning.
- 2020
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Ingår i: Nursing in Critical Care. - : Wiley. - 1362-1017 .- 1478-5153. ; :2, s. 102-108
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The whole family is affected if one family member is critically ill. The Family Health Conversation Intervention may give the family tools that support healthier family functioning.AIMS AND OBJECTIVES: The aim of this study was to identify which components of family function are affected when families participate in Family Health Conversations.DESIGN: A secondary analysis was performed of existing qualitative interviews. The Family Health Conversation is an intervention where nurses ask the family reflective questions, and reflection is made possible in three conversation sessions.METHODS: This study included transcribed data from 13 follow-up interviews from seven families attending Family Health Conversations after three and 12 months. Data were analysed with narrative analysis, focusing on family function.RESULTS: Three themes were identified. The families' family functioning had been supported with: improved understanding of each other-there was an understanding of being in the same situation but still having totally different experiences; more concern for each other-they talked about their different experiences and felt they had become closer to each other; and a process of working through-they had experienced working through various experiences, standing by and supporting, and then being able to move on.CONCLUSIONS: The Family Health Conversation Intervention is provided to families, accompanied by nurses. The families in this study gained an awareness of their family function that brought the family closer because of improved understanding of each other and the situation. The families experienced openness, and the family members spoke more freely with each other, which facilitated the progress of working through the experience of critical illness and helped to maintain healthy family functioning.RELEVANCE TO CLINICAL PRACTICE: It is important to have an overall perspective and to recognize the patient and the family as equally important within the family for awareness of family function.
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| 7. |
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| 8. |
- Ahlberg, M, et al.
(författare)
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Obstetric management in vacuum-extraction deliveries
- 2016
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Ingår i: Sexual & reproductive healthcare : official journal of the Swedish Association of Midwives. - : Elsevier BV. - 1877-5764. ; 8, s. 94-99
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Tidskriftsartikel (refereegranskat)
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| 9. |
- Ahlberg, Malin, 1986, et al.
(författare)
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Paradigm classification in supervised learning of morphology
- 2015
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Ingår i: Proceedings of the 2015 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies.
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Konferensbidrag (refereegranskat)abstract
- Supervised morphological paradigm learning by identifying and aligning the longest common subsequence found in inflection tables has recently been proposed as a simple yet competitive way to induce morphological patterns. We combine this non-probabilistic strategy of inflection table generalization with a discriminative classifier to permit the reconstruction of complete inflection tables of unseen words. Our system learns morphological paradigms from labeled examples of inflection patterns (inflection tables) and then produces inflection tables from unseen lemmas or base forms. We evaluate the approach on datasets covering 11 different languages and show that this approach results in consistently higher accuracies vis-a-vis other methods on the same task, thus indicating that the general method is a viable approach to quickly creating high-accuracy morphological resources.
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| 10. |
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