| 1. |
- Peyrin, Francoise, et al.
(author)
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Synchrotron radiation CT from the micro to nanoscale for the investigation of bone tissue
- 2012
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In: Proceedings of SPIE. - : SPIE. - 9780819492234 ; , s. 85060L-
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Conference paper (peer-reviewed)abstract
- During the last decade, X-ray micro Computerized Tomography (CT) has become a conventional technique for the threedimensional (3D) investigation of trabecular bone micro-architecture. Coupling micro-CT to synchrotron sources possesses significant advantages in terms of image quality and gives access to information on bone mineralization which is an important factor of bone quality. We present an overview of the investigation of bone using Synchrotron Radiation (SR) CT from the micro to the nano scale. We introduce two synchrotron CT systems developed at the ESRF based on SR parallel-beam micro-CT and magnified phase CT respectively, achieving down to submicrometric and nanometric spatial resolution. In the latter, by using phase retrieval prior to tomographic reconstruction, the system provides maps of the 3D refractive index distribution. Parallel-beam SR micro-CT has extensively been used for the analysis of trabecular or cortical bone in human or small animals with spatial resolution in the range [3-10] μm. However, the characterization of the bone properties at the cellular scale is also of major interest. At the micrometric scale, the shape, density and morphology of osteocyte lacunae can be studied on statistically representative volumes. At the nanometric scale, unprecedented 3D displays of the canaliculi network have been obtained on fields of views including a large number of interconnected osteocyte lacunae. Finally SR magnified phase CT provides a detailed analysis of the lacuno-canalicular network and in addition information on the organization of the collagen fibers. These findings open new perspectives for three-dimensional quantitative assessment of bone tissue at the cellular scale.
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| 2. |
- Koivunen, Anu
(author)
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Inblickar: sätt att se på film
- 2008
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In: Film och andra rörliga bilder - en introduktion. - : Raster Förlag, Stockholm. - 9789187215872 ; , s. 17-
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Book chapter (other academic/artistic)
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| 3. |
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| 4. |
- Mishra, Deepak, et al.
(author)
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Multi-Tag Backscattering to MIMO Reader: Channel Estimation and Throughput Fairness
- 2019
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In: IEEE Transactions on Wireless Communications. - : IEEE. - 1536-1276 .- 1558-2248. ; 18:12, s. 5584-5599
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Journal article (peer-reviewed)abstract
- Green low power networking with the least requirement of dedicated radio resources is need of the hour which has led to the upsurge of backscatter communication (BSC) technology. However, this inherent potential of BSC is challenged by hardware constraints of the underlying tags. We address this timely concern by investigating the practical efficacy of multiple-input-multiple-output (MIMO) technology in overcoming the fundamental limitations of BSC. Specifically, we first introduce a novel least-squares based channel estimation (CE) protocol for multi-tag BSC settings that takes care of both the unintended ambient reflections and the inability of tags in performing estimation by themselves. Then using it, a nontrivial low-complexity algorithm is proposed to obtain the optimal transceiver designs for the multiantenna reader to maximize the minimum value of the lower-bounded backscattered throughput among the single-antenna semi-passive tags. Additional analytical insights on both individually and jointly-optimal precoding vector and detector matrix at the reader are provided by exploring the asymptotically-optimal transceiver designs. Lastly detailed numerical investigation is carried out to validate the theoretical results and quantify the practically realizable throughput fairness. Specifically, more than seven-fold increase in the common-backscattered-throughput among tags as achieved by the proposed designs over the relevant benchmarks corroborates their practical significance.
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| 5. |
- Santaniello, Francesca, et al.
(author)
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Effects of partial cutting on logging productivity, economic returns and dead wood in boreal pine forest
- 2016
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In: Forest Ecology and Management. - : Elsevier BV. - 0378-1127 .- 1872-7042. ; 365, s. 152-158
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Journal article (peer-reviewed)abstract
- Structural diversity of forests is important for biodiversity. In managed forests, structural diversity can be maintained by retaining living and dead trees, and by creating dead wood during logging operations. In Sweden, a small percentage of the trees is currently retained on each clear-cut. Since retention decreases revenues from forest harvesting, it is important to understand the consequences of retention for both forestry economy and biodiversity conservation. Thus, in this study we compared effects of retaining percentages ranging from 5% to 50% of the initial number of trees in 12 Scots pine-dominated stands in central Sweden. The retained trees in each stand consisted of equal proportions of green living trees, felled trees, high-cut trees and girdled trees. We estimated costs associated with tree retention and, as indicators of biodiversity conservation values, dead wood volumes, number of dead wood types, and dead wood diversity. We also estimated the damage caused by the logging operations on old dead wood. Revenue declined with increases in retention level, due mainly to associated reductions in harvested volumes, but partly to increases in logging costs. Both harvester and forwarder performance were lower at high than at low retention levels. The volume of dead wood increased with increases in retention level, since the number of retained trees killed per stand was proportional to the retention level. The number of dead wood types and dead wood diversity increased continuously up to the highest retention level of almost 50%. Moreover, old dead wood that was deemed particularly valuable for biodiversity was not destroyed at retention levels above 30%. In conclusion, dead wood destruction decreased with increasing retention level and costs increased proportionally to the retained volume. There were no signs of saturation of dead wood diversity as retention level increased. Therefore, mainly economic restrains will determine the retention level. (C) 2016 Elsevier B.V. All rights reserved.
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| 8. |
- Ahn, Song-ee, 1972-, et al.
(author)
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Simulation-based training in VET through the lens of a sociomaterial perspective
- 2020
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In: Nordic Journal of Vocational Education and Training. - Linköping : Linköping University Electronic Press. - 2242-458X. ; 10:1, s. 1-17
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Journal article (peer-reviewed)abstract
- This article aims to review the pedagogical research on simulation training in voca-tional education and training (VET) and to discuss the emerging teaching practice from a socio-material perspective on learning and practice. Literature reviews on research into simulation training with pedagogical interests show that there are three main themes: 1) the effect of technology-enhanced simulation training, 2) the fidelity and authenticity of simulation and learning, and 3) pedagogical consideration and under-pinnings. The article draws on a sociomaterial perspective on learning and practice to problematise and discuss the findings of previous research. This theoretical perspec-tive makes it possible to discuss how technology, educational practice and social rela-tions are intertwined and precondition each other.Through the lens of sociomaterial theory, the article discusses how the introduction of the new technologies brings about changes and expectations of what can be learned, how the teaching practices are enacted and how this affects the relationship between teachers and students.
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| 9. |
- Ajjoub, Orwa
(author)
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HTS is not al-Qaeda, but it is still an authoritarian regime to be reckoned with
- 2021
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In: Middle East Institute.
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Journal article (pop. science, debate, etc.)abstract
- This article argues that while HTS’s transformation and split from al-Qaeda is real, al-Jolani must be pressured to share power over Idlib and loosen his group’s authoritarian grip, which is causing grievances that in the long term will push locals into the hands of radical groups like ISIS and al-Qaeda.
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| 10. |
- Andruetto, Claudia, et al.
(author)
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Categorization of urban logistics concepts according to their sustainability performance
- 2023
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In: 2022 Conference Proceedings Transport Research Arena, TRA Lisbon 2022. - : Elsevier BV. ; , s. 2708-2715
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Conference paper (peer-reviewed)abstract
- The transport-related externalities of the urban logistics system impact the urban environment and the health of the citizens: there is a need to improve the sustainability of the system. In this paper, we use a framework for sustainability performance abessment and a literature review to analyse the urban logistics concepts of electrification, consolidation, cargo bikes and automation. In the literature, there is a focus on pollution, while a holistic perspective on sustainability is lacking. A Sustainability Performance Abessment (SPA) matrix is the main result of this paper, as a tool for comparing the concepts and understanding how they can be combined to achieve integrated benefits. To make informed decisions, stakeholders need knowledge from a holistic perspective. The findings presented in this paper are a first step to achieving this required knowledge.
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