| 1. |
- Carlsson, Fredrik, et al.
(författare)
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A Conceptual Framework for Time Distortion Analysis in Method Components
- 2014
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Ingår i: Enterprise, Business-Process and Information Systems Modeling. - Berlin, Heidelberg : Springer. - 9783662437445 - 9783662437452 ; , s. 454-463
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Konferensbidrag (refereegranskat)abstract
- The “software crisis” is still a prevailing problem to many organizations despite existence of advanced systems engineering methods, techniques for project planning and method engineering; systems engineering project still struggle to deliver on time and budget, and with sufficient quality. Existing research stresses that time leakage has a lever effect on economic outcome, which is not addressed in the abovementioned approaches. As part of an on-going research project we therefore extend existing method engineering concept to include time distortion analysis. This allows for analysis of resource use (productivity) in execution of method components. It has the potential to act as a) a tool for improving the execution of systems engineering processes, or b) criteria for selecting method parts to improve the systems engineering processes.
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| 2. |
- Karlsson, Fredrik, 1974-, et al.
(författare)
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A conceptual framework for time distortion analysis in method components
- 2014
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Ingår i: Exploring Modelling Methods for Systems Analysis and Design (EMMSAD'14). - Berlin Heidelberg : Springer Berlin/Heidelberg. - 9783662437445 ; , s. 454-463
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Konferensbidrag (refereegranskat)abstract
- The “software crisis” is still a prevailing problem to many organizations despite existence of advanced systems engineering methods, techniques for project planning and method engineering; systems engineering project still struggle to deliver on time and budget, and with sufficient quality. Existing research stresses that time leakage has a lever effect on economic outcome, which is not addressed in the abovementioned approaches. As part of an on-going research project we therefore extend existing method engineering concept to include time distortion analysis. This allows for analysis of resource use (productivity) in execution of method components. It has the potential to act as a) a tool for improving the execution of systems engineering processes, or b) criteria for selecting method parts to improve the systems engineering processes.
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| 3. |
- Linander, Fredrik, 1973-, et al.
(författare)
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Measuring and Visualising Projects' Collective Method Rationale
- 2016
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Ingår i: The Practice of Enterprise Modeling. - Cham : Springer International Publishing. - 9783319483924 - 9783319483931 ; , s. 344-352
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Konferensbidrag (refereegranskat)abstract
- Existing research provide frameworks for analysing the rationale behind engineering methods and how this rationale matches the rationale of individual project members. As methods are used in groups, this raises questions about how to study method rationale on an aggregated project level. We propose an elaboration of method rationale theory to enable this type of analysis. We introduce the concept of collective method rationale together with metrics to capture this aggregated rationale. The conceptual work is implemented in a computerized tool, which enables analyses of collective method rationale in product development projects. These are the results of an action research project and we present a pilot test of the computerized tool to demonstrate the concept.
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| 4. |
- Gerken, Jan, 1991, et al.
(författare)
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Equivariance versus augmentation for spherical images
- 2022
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Ingår i: Proceedings of Machine Learning Resaerch. ; , s. 7404-7421
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Konferensbidrag (refereegranskat)abstract
- We analyze the role of rotational equivariance in convolutional neural networks (CNNs) applied to spherical images. We compare the performance of the group equivariant networks known as S2CNNs and standard non-equivariant CNNs trained with an increasing amount of data augmentation. The chosen architectures can be considered baseline references for the respective design paradigms. Our models are trained and evaluated on single or multiple items from the MNIST- or FashionMNIST dataset projected onto the sphere. For the task of image classification, which is inherently rotationally invariant, we find that by considerably increasing the amount of data augmentation and the size of the networks, it is possible for the standard CNNs to reach at least the same performance as the equivariant network. In contrast, for the inherently equivariant task of semantic segmentation, the non-equivariant networks are consistently outperformed by the equivariant networks with significantly fewer parameters. We also analyze and compare the inference latency and training times of the different networks, enabling detailed tradeoff considerations between equivariant architectures and data augmentation for practical problems.
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| 5. |
- Gerken, Jan, 1991, et al.
(författare)
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Geometric deep learning and equivariant neural networks
- 2023
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Ingår i: Artificial Intelligence Review. - : Springer Nature. - 1573-7462 .- 0269-2821. ; 56:12, s. 14605-14662
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Tidskriftsartikel (refereegranskat)abstract
- We survey the mathematical foundations of geometric deep learning, focusing on group equivariant and gauge equivariant neural networks. We develop gauge equivariant convolutional neural networks on arbitrary manifolds M using principal bundles with structure group K and equivariant maps between sections of associated vector bundles. We also discuss group equivariant neural networks for homogeneous spaces M= G/ K , which are instead equivariant with respect to the global symmetry G on M . Group equivariant layers can be interpreted as intertwiners between induced representations of G, and we show their relation to gauge equivariant convolutional layers. We analyze several applications of this formalism, including semantic segmentation and object detection networks. We also discuss the case of spherical networks in great detail, corresponding to the case M= S2= SO (3) / SO (2) . Here we emphasize the use of Fourier analysis involving Wigner matrices, spherical harmonics and Clebsch–Gordan coefficients for G= SO (3) , illustrating the power of representation theory for deep learning.
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| 6. |
- Holmberg, Jenny, et al.
(författare)
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Exploring motives and perceived barriers for voice modification : the views of transgender and gender-diverse voice clients
- 2023
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Ingår i: Journal of Speech, Language and Hearing Research. - : American Speech Language Hearing Association. - 1092-4388 .- 1558-9102. ; 66:7, s. 2246-2259
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To date, transgender and gender-diverse voice clients' perceptions and individual goals have been missing in discussions and research on gender-affirming voice therapy. Little is, therefore, known about the client's expectations of therapy outcomes and how these are met by treatments developed from views of vocal gender as perceived by cisgender persons. This study aimed to explore clients' individual motives and perceived barriers to undertaking gender-affirming voice therapy.Method: Individual, semistructured interviews with 15 transgender and gender-diverse voice clients considering voice therapy were conducted and explored using qualitative content analysis.Results: Three themes were identified during the analysis of the participants' narratives. In the first theme, “the incongruent voice setting the rules,” the contribution of the voice on the experienced gender dysphoria is put in focus. The second theme, “to reach a voice of my own choice,” centers around anticipated personal gains using a modified voice. The third theme, “a voice out of reach,” relates to worries and restricting factors for not being able to reach one's set goals for voice modification.Conclusions: The interviews clearly indicate a need for a person-centered voice therapy that starts from the individuals' expressed motives for modifying the voice yet also are affirmative of anticipated difficulties related to voice modification. We recommend that these themes should form the basis of the pretherapy joint discussion between the voice client and the speech-language pathologist to ensure therapy goals that are realistic and relevant to the client.
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| 7. |
- Linander, Hampus, 1985, et al.
(författare)
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(2,0) theory on circle fibrations
- 2012
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Ingår i: Journal of High Energy Physics. - 1029-8479 .- 1126-6708. ; 2012:1, s. Article Number: 159 -
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Tidskriftsartikel (refereegranskat)abstract
- We consider (2,0) theory on a manifold M_6 that is a fibration of a spatial S^1 over some five-dimensional base manifold M_5. Initially, we study the free (2,0) tensor multiplet which can be described in terms of classical equations of motion in six dimensions. Given a metric on M_6 the low energy effective theory obtained through dimensional reduction on the circle is a Maxwell theory on M_5. The parameters describing the local geometry of the fibration are interpreted respectively as the metric on M_5, a non-dynamical U(1) gauge field and the coupling strength of the resulting low energy Maxwell theory. We derive the general form of the action of the Maxwell theory by integrating the reduced equations of motion, and consider the symmetries of this theory originating from the superconformal symmetry in six dimensions. Subsequently, we consider a non-abelian generalization of the Maxwell theory on M_5. Completing the theory with Yukawa and phi^4 terms, and suitably modifying the supersymmetry transformations, we obtain a supersymmetric Yang-Mills theory which includes terms related to the geometry of the fibration.
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| 8. |
- Serneke, Byggkoncern
(författare)
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H22-huset : En ny bostadstyp mot ensamhet
- 2023
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Bok (övrigt vetenskapligt/konstnärligt)abstract
- Kan vi bygga bort ofrivillig ensamhet i Sverige? Inom det Vinnova-finansierade projektet H22 Alone Together har vi under två års tid ställt oss denna fråga. Resultatet av gemensamma krafter blev en helt ny bostadstyp, H22-huset.
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