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- Fitz-Koch, Sarah
(author)
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Who am I, and if so, how many? Identity dynamics in agricultural entrepreneurship
- 2020
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Doctoral thesis (other academic/artistic)abstract
- Identity matters and identity is hailed increasingly as central to fully apprehending entrepreneurship. Identity is inherent to entrepreneurship because entrepreneurs establish and grow their ventures based on their identities. Hence, identity infuses entrepreneurial activities with meaning and guidance. An identity perspective in entrepreneurship allows us to move beyond traditional views embedded in economic rationality when seeking to understand entrepreneurial motivation and behavior in the agricultural sector. It emphasizes that farming entrepreneurs think, behave and act in ways that they deem appropriate for themselves ‒ notably because farmers are explored as individuals who are sensitive to their personal values and beliefs, which are crucial to identity. Each farmer has her/his own version of what it means to be a good farmer, which influences her/his entrepreneurial behavior.This dissertation is situated in the growing literature on identities in entrepreneurship that has provided new insights and developed theory that helps explain the rich heterogeneity of entrepreneurs’ characteristics and motivations as well as how entrepreneurs’ identities are linked to decision-making and behavior. However, there is insufficient analytical use of the dynamics of entrepreneurs’ multiple identities in existing scholarly work. This problem is critical because there are potentially multiple salient identities to entrepreneurs that evolve and/or change over time and that consequently influence entrepreneurial endeavors and outcomes and that need to be managed by entrepreneurs. It is, moreover, critical because identity might not only influence entrepreneurial behavior and outcomes but in turn might also be influenced by entrepreneurial endeavors. Given these limitations, the purpose of this dissertation is to investigate the dynamics of entrepreneurs’ identities over time when pursuing entrepreneurship.To fulfill this purpose, the dissertation builds on a longitudinal and qualitative theorybuilding research approach that allows actors under study to be followed over an extended period of time and identity dynamics and context to be captured in greater detail. Opportunities for researching identity dynamics in entrepreneurship become especially apparent as we look at farming. Social and structural changes in the agricultural sector result in farmers’ enactment of various social roles and/or social group affiliations. At the same time, the majority of farming takes place in the family context in which family farms are transitioned over many generations. In such a complex environment, the development and the psychological experience of managing multiple identities can constitute both challenges and opportunities for farmers.Overall, the dissertation contributes to the emerging inquiry on identities in entrepreneurship by providing novel theoretical models of founder identity development Who am I, and if so, how many? Identity Dynamics in Agricultural Entrepreneurship Abstract and processes of identity management and their influence on individually and on organizationally relevant outcomes. The findings of the dissertation also contribute to the literature on contextualizing entrepreneurship by providing key contextual dimensions of the agricultural sector and showing how studying these dimensions can illuminate less well-understood aspects of entrepreneurship theory. Practically, this dissertation presents obstacles to, and opportunities for, developing an entrepreneurial identity and a more entrepreneurial approach in the agricultural sector.
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- Dick Thelander, Kimberly
(author)
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A review of nanowire growth promoted by alloys and non-alloying elements with emphasis on Au-assisted III-V nanowires
- 2008
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In: Progress in Crystal Growth and Characterization of Materials. - : Elsevier BV. - 0960-8974. ; 54:3-4, s. 138-173
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Research review (peer-reviewed)abstract
- Seed particles of elements or compounds which may or may not form alloys are now used extensively in promoting well-controlled nanowire growth. The technology has evolved following the well-known Vapour-Liquid-Solid (VLS) model which was developed over 40 years ago. This model indicates that a liquid alloy is formed from the seed particle and the growth precursor(s), resulting in crystal growth by precipitation from a supersaturated solution. The enhanced growth rate compared to the bulk growth from the vapour is typically attributed to preferential decomposition of precursor materials at or near the particle surface. Recently, however, there has been much interest in further developing this model, which was developed for Au-assisted Si whiskers (with diameter on the micrometre scale), in order to generally describe particle-assisted growth on the nanoscale using a variety of materials and growth systems. This review discusses the current understanding of particle-assisted nanowire growth. The aim is first to give an overview of the historical development of the model, with a discussion of potential growth mechanisms. In particular, the enhancement of growth rate in one dimension due to preferential deposition at the particle-wire interface will be discussed. Then, the particular example of Ill-V nanowires grown by metal-organic vapour phase epitaxy using Au particles will be revised, with details of the various growth processes involved in this system. The aim of this review is not to provide a conclusive answer to the question of why nanowires grow from seed particle alloys, but to describe the progress made towards this goal of a unified theory of growth, and to clarify the current standing of the question. (c) 2008 Elsevier Ltd. All rights reserved.
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- Kyro, Cecilie, et al.
(author)
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Alkylresorcinols (biomarkers of whole grain intake), cereal fibre intake and metabolic profile - results from a European study
- 2020
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In: Proceedings of the Nutrition Society. - : Cambridge University Press. - 0029-6651 .- 1475-2719. ; 79:OCE2, s. E648-E648
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Journal article (other academic/artistic)abstract
- Background: High intakes of whole-grains and cereal fiber have been consistently associated with lower risk of cardiometabolic diseases in observational studies. Yet, improved understanding about the underlying mechanisms is needed. We hypothesized that cereal fiber and whole-grain are associated with beneficial metabolic marker profiles.Aim: To investigate if cereal fiber intake, estimated by food frequency questionnaires and plasma total alkylresorcinols concentrations as well as the C17:0/C21:0-ratio in plasma as biomarkers of whole-grain wheat and rye intake or the relative whole-grain rye to wheat intake, respectively, were associated with metabolic biomarkers.Design: A cross-sectional study conducted to investigate the associations between alkylresorcinols as biomarker of whole-grain wheat and rye intake, cereal fiber and selected metabolic biomarkers among 954 participants of the European Prospective Investigation into Cancer and Nutrition (EPIC) study. Cereal fiber intake was assessed by FFQ and whole grain wheat and rye were reflected by biomarkers analyzed in plasma samples, i.e. total alkylresorcinol (AR). Moreover, the ratio of two of the five measured alkylresorcinols (AR C17:0/C21:0 ratio) was used as an indicator of whole-grain source (wheat or rye). Metabolic biomarkers (HbA1c, C-peptide, IGFBP-1, IGFBP-2, total cholesterol, LDL, HDL, triglycerides, apolipoprotein A-I (apoA), apolipoprotein B (ApoB) and CRP) were measured in blood samples. All biomarkers were already measured for nested case-control studies of colorectal cancer matched based on sex, study center, age at blood collection, date and time of blood collection, fasting status. Women were further matched by menopausal status, phase of menstrual cycle, and use of oral contraceptives or hormone replacement therapy at time of blood collection. Multivariable linear regression analysis was used to investigate the relationship between exposure variables metabolic biomarkers adjusted for case-control status and common confounders.Results: No associations were found between cereal fiber intake and the metabolic markers. However, whole-grain wheat and rye intake, reflected by total AR, was associated with a lower concentration of the inflammation marker CRP. The alkylresorcinol C17:0/C21:0 ratio was not associated with any of the measured metabolic markers in this cohort.Conclusion: Overall, we found no support for an association between cereal fibre intake, whole grain wheat and rye intake reflected by biomarkers and metabolic markers in the present cohort. One exception was the finding of an inverse association between whole grain biomarkers and CRP. Prospective studies or RCTs are warranted to confirm our findings.
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| 6. |
- Roszbach, Bob
(author)
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Safety on motorways : Comments
- 1991
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In: Proceedings of Third European Workshop on Recent Developments in Road Safety Research. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 77-80
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Conference paper (other academic/artistic)
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| 8. |
- Lowry, Stephanie, 1979-, et al.
(author)
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Building Beliefs : Unsupervised Generation of Observation Likelihoods for Probabilistic Localization in Changing Environments
- 2015
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In: IEEE International Conference on Intelligent Robots and Systems (IROS), IEEE, 2015. - New York, USA : IEEE. - 9781479999941 ; , s. 3071-3078
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Conference paper (peer-reviewed)abstract
- This paper is concerned with the interpretation of visual information for robot localization. It presents a probabilistic localization system that generates an appropriate observation model online, unlike existing systems which require pre-determined belief models. This paper proposes that probabilistic visual localization requires two major operating modes - one to match locations under similar conditions and the other to match locations under different conditions. We develop dual observation likelihood models to suit these two different states, along with a similarity measure-based method that identifies the current conditions and switches between the models. The system is experimentally tested against different types of ongoing appearance change. The results demonstrate that the system is compatible with a wide range of visual front-ends, and the dual-model system outperforms a single-model or pre-trained approach and state-of-the-art localization techniques.
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| 10. |
- Muro-Arena, G. A., et al.
(author)
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Shadowing and multiple rings in the protoplanetary disk of HD 139614
- 2020
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 635
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Journal article (peer-reviewed)abstract
- Context. Shadows in scattered light images of protoplanetary disks are a common feature and support the presence of warps or misalignments between disk regions. These warps are possibly caused by an inclined (sub-)stellar companion embedded in the disk. Aims. We aim to study the morphology of the protoplanetary disk around the Herbig Ae star HD 139614 based on the first scattered light observations of this disk, which we model with the radiative transfer code MCMax3D. Methods. We obtained J- and H-band observations that show strong azimuthal asymmetries in polarized scattered light with VLT/SPHERE. In the outer disk, beyond similar to 30 au, a broad shadow spans a range of similar to 240 deg in position angle, in the east. A bright ring at similar to 16 au also shows an azimuthally asymmetric brightness, with the faintest side roughly coincidental with the brightest region of the outer disk. Additionally, two arcs are detected at similar to 34 and similar to 50 au. We created a simple four-zone approximation to a warped disk model of HD 139614 in order to qualitatively reproduce these features. The location and misalignment of the disk components were constrained from the shape and location of the shadows they cast. Results. We find that the shadow on the outer disk covers a range of position angles too wide to be explained by a single inner misaligned component. Our model requires a minimum of two separate misaligned zones - or a continuously warped region - to cast this broad shadow on the outer disk. A small misalignment of similar to 4 degrees between adjacent components can reproduce most of the observed shadow features. Conclusions. Multiple misaligned disk zones, potentially mimicking a warp, can explain the observed broad shadows in the HD 139614 disk. A planetary mass companion in the disk, located on an inclined orbit, could be responsible for such a feature and for the dust-depleted gap responsible for a dip in the SED.
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