| 1. |
- Agrasada, Grace V., et al.
(författare)
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Exclusive breastfeeding of low birth weight infants for the first six months : infant morbidity and maternal and infant anthropometry
- 2011
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Ingår i: Asia Pacific Journal of Clinical Nutrition. - : H E C Press. - 0964-7058 .- 1440-6047. ; 20:1, s. 62-68
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Tidskriftsartikel (refereegranskat)abstract
- Background: to report anthropometry and morbidity among term low birth weight infants and anthropometry of their first time mothers during the first six months in relation to breastfeeding practice. Methods: we examined data from a randomized controlled trial in Manila, the Philippines. Of the 204 mothers randomized, 68 mothers received eight postpartum breastfeeding counseling sessions, the rest did not. Maternal and infant anthropometric data at birth, 2, 4 and 6 months were taken. During seven follow-up hospital visits, an independent interviewer recorded feeding data. Results: the 24 infants exclusively breastfed from birth to six months did not have diarrhea compared to 134 partially breastfed (mean 2.3 days) and 21 non-breastfed infants (mean 2.5 days). Partially breastfed and non-breastfed infants compared to exclusively breastfed infants had more frequent, as well as more severe episodes of respiratory infections. At six months, neither overall gain in infant weight, length and head circumferences nor mean maternal weight and body mass index differed significantly between the feeding groups. Conclusions: exclusive breastfeeding for 6 months can be recommended in term low birth weight infants, who were protected from diarrhea, had fewer respiratory infections, required no hospitalization and had catch up growth. Exclusively breastfeeding mothers did not differ from mothers who breastfed partially or those who did not breastfeed with regard to weight changes at six months.
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| 2. |
- Alenljung, Beatrice, 1971-, et al.
(författare)
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Conveying Emotions by Touch to the Nao Robot : A User Experience Perspective
- 2018
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Ingår i: Multimodal Technologies and Interaction. - : MDPI. - 2414-4088. ; 2:4
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Tidskriftsartikel (refereegranskat)abstract
- Social robots are expected gradually to be used by more and more people in a widerrange of settings, domestic as well as professional. As a consequence, the features and qualityrequirements on human–robot interaction will increase, comprising possibilities to communicateemotions, establishing a positive user experience, e.g., using touch. In this paper, the focus is ondepicting how humans, as the users of robots, experience tactile emotional communication with theNao Robot, as well as identifying aspects affecting the experience and touch behavior. A qualitativeinvestigation was conducted as part of a larger experiment. The major findings consist of 15 differentaspects that vary along one or more dimensions and how those influence the four dimensions ofuser experience that are present in the study, as well as the different parts of touch behavior ofconveying emotions.
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| 3. |
- Alenljung, Beatrice, et al.
(författare)
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User Experience in Social Human-Robot Interaction
- 2017
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Ingår i: International Journal of Ambient Computing and Intelligence (IJACI). - : I G I Global. - 1941-6237 .- 1941-6245. ; 8:2, s. 12-31
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Tidskriftsartikel (refereegranskat)abstract
- Socially interactive robots are expected to have an increasing importance in human society. For social robots to provide long-term added value to people’s lives, it is of major importance to stressthe need for positive user experience (UX) of such robots. The human-centered view emphasizes various aspects that emerge in the interaction between humans and robots. However, a positive UX does not appear by itself but has to be designed for and evaluated systematically. In this paper, the focus is on the role and relevance of UX in human-robot interaction (HRI) and four trends concerning the role and relevance of UX related to socially interactive robots are identified, and three challenges related to its evaluation are also presented. It is argued that current research efforts and directions are not sufficient in HRI research, and that future research needs to further address interdisciplinary research in order to achieve long-term success of socially interactive robots.
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| 4. |
- Almer, Johan, 1961-
(författare)
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Att sätta döden ur spel : En analys av Tomas Tranströmers dikt "Medeltida motiv"
- 2018
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Ingår i: Samlaren. - Uppsala : Svenska Litteratursällskapet. - 0348-6133 .- 2002-3871. ; 139:-, s. 162-177
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Tidskriftsartikel (refereegranskat)abstract
- To knock Death out of the Game. An analysis of Tomas Tranströmer’s poem “Medieval motif ”The Swedish poet Tomas Tranströmer’s (1931–2015) poem “Medieval Motif ”, from For Living and Dead (1989), takes its visual point of departure in the motif “Man who plays chess with Death about his life”. A motif also found in medieval visual arts (Albertus Pictor, 1440–1509) and in modern film art (Ingmar Bergman, 1918–2007). In both Pictors painting, ”The Game of Chess with Death” (around 1480), and Bergman’s film The Seventh Seal (1957), Death knocks man out of the game by checkmate. In Tranströmer’s poem, however, things turn out somewhat differently. In “Medieval Motif ” there is unique word in Swedish poetry, “frisörsaxklippande” (“barber-scissor-like clipping”), as a determination for a sound. The analysis of the poem tries to answer a number of questions: What is this sound exactly? Why does the sound occur in a poem about a motif from the Middle Ages? What function does the sound have for the poem as an artistic whole? The “Medieval motif ”, which besides the title consists of two Sapphic stanzas, is the subject of an in-depth motif analysis and of a composition analysis. In summary, the analysis shows that the “Medieval motif ” forms an epiphany where the motif of Vanitas contributes to the understanding of the moment of togetherness as time and space cease to exist, and a previously hidden truth is revealed. As a part of that truth, Death is knocked out of the game.
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| 5. |
- Amouzgar, Kaveh, 1980-, et al.
(författare)
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A framework for simulation-based multi-objective optimization and knowledge discovery of machining process
- 2018
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Ingår i: The International Journal of Advanced Manufacturing Technology. - : Springer Science and Business Media LLC. - 0268-3768 .- 1433-3015. ; 98:9-12, s. 2469-2486
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Tidskriftsartikel (refereegranskat)abstract
- The current study presents an effective framework for automated multi-objective optimization (MOO) of machining processes by using finite element (FE) simulations. The framework is demonstrated by optimizing a metal cutting process in turning AISI-1045, using an uncoated K10 tungsten carbide tool. The aim of the MOO is to minimize tool-chip interface temperature and tool wear depth, that are extracted from FE simulations, while maximizing the material removal rate. The effect of tool geometry parameters, i.e., clearance angle, rake angle, and cutting edge radius, and process parameters, i.e., cutting speed and feed rate on the objective functions are explored. Strength Pareto Evolutionary Algorithm (SPEA2) is adopted for the study. The framework integrates and connects several modules to completely automate the entire MOO process. The capability of performing the MOO in parallel is also enabled by adopting the framework. Basically, automation and parallel computing, accounts for the practicality of MOO by using FE simulations. The trade-off solutions obtained by MOO are presented. A knowledge discovery study is carried out on the trade-off solutions. The non-dominated solutions are analyzed using a recently proposed data mining technique to gain a deeper understanding of the turning process.
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| 6. |
- Amouzgar, Kaveh, 1980-, et al.
(författare)
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Metamodel based multi-objective optimization of a turning process by using finite element simulation
- 2020
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Ingår i: Engineering optimization (Print). - : Taylor & Francis Group. - 0305-215X .- 1029-0273. ; 52:7, s. 1261-1278
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Tidskriftsartikel (refereegranskat)abstract
- This study investigates the advantages and potentials of the metamodelbased multi-objective optimization (MOO) of a turning operation through the application of finite element simulations and evolutionary algorithms to a metal cutting process. The objectives are minimizing the interface temperature and tool wear depth obtained from FE simulations using DEFORM2D software, and maximizing the material removal rate. Tool geometry and process parameters are considered as the input variables. Seven metamodelling methods are employed and evaluated, based on accuracy and suitability. Radial basis functions with a priori bias and Kriging are chosen to model tool–chip interface temperature and tool wear depth, respectively. The non-dominated solutions are found using the strength Pareto evolutionary algorithm SPEA2 and compared with the non-dominated front obtained from pure simulation-based MOO. The metamodel-based MOO method is not only advantageous in terms of reducing the computational time by 70%, but is also able to discover 31 new non-dominated solutions over simulation-based MOO.
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| 7. |
- Amouzgar, Kaveh, 1980-, et al.
(författare)
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Multi-objective optimisation of tool indexing problem : a mathematical model and a modified genetic algorithm
- 2021
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Ingår i: International Journal of Production Research. - : Taylor & Francis Group. - 0020-7543 .- 1366-588X. ; 59:12, s. 3572-3590
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Tidskriftsartikel (refereegranskat)abstract
- Machining process efficiencies can be improved by minimising the non-machining time, thereby resulting in short operation cycles. In automatic-machining centres, this is realised via optimum cutting tool allocation on turret-magazine indices – the “tool-indexing problem”. Extant literature simplifies TIP as a single-objective optimisation problem by considering minimisation of only the tool-indexing time. In contrast, this study aims to address the multi-objective optimisation tool indexing problem (MOOTIP) by identifying changes that must be made to current industrial settings as an additional objective. Furthermore, tool duplicates and lifespan have been considered. In addition, a novel mathematical model is proposed for solving MOOTIP. Given the complexity of the problem, the authors suggest the use of a modified strength Pareto evolutionary algorithm combined with a customised environment-selection mechanism. The proposed approach attained a uniform distribution of solutions to realise the above objectives. Additionally, a customised solution representation was developed along with corresponding genetic operators to ensure the feasibility of solutions obtained. Results obtained in this study demonstrate the realization of not only a significant (70%) reduction in non-machining time but also a set of tradeoff solutions for decision makers to manage their tools more efficiently compared to current practices.
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| 8. |
- Amouzgar, Kaveh, 1980-, et al.
(författare)
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Optimizing index positions on CNC tool magazines considering cutting tool life and duplicates
- 2020
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Ingår i: Procedia CIRP. - : Elsevier. - 2212-8271 .- 2212-8271. ; 93, s. 1508-1513
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Tidskriftsartikel (refereegranskat)abstract
- Minimizing the non-machining time of CNC machines requires optimal positioning of cutting tools on indexes (stations) of CNC machine turret magazine. This work presents a genetic algorithm with a novel solution representation and genetic operators to find the best possible index positions while tool duplicates and tools life are taken in to account during the process. The tool allocation in a machining process of a crankshaft with 10 cutting operations, on a 45-index magazine, is optimized for the entire life of the tools on the magazine. The tool-indexing time is considerably reduced compared to the current index positions being used in an automotive factory.
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| 9. |
- Amouzgar, Kaveh, 1980-, et al.
(författare)
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Radial basis functions as surrogate models with a priori bias in comparison with a posteriori bias
- 2017
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Ingår i: Structural and multidisciplinary optimization (Print). - : Springer Science and Business Media LLC. - 1615-147X .- 1615-1488. ; 55:4, s. 1453-1469
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Tidskriftsartikel (refereegranskat)abstract
- In order to obtain a robust performance, the established approach when using radial basis function networks (RBF) as metamodels is to add a posteriori bias which is defined by extra orthogonality constraints. We mean that this is not needed, instead the bias can simply be set a priori by using the normal equation, i.e. the bias becomes the corresponding regression model. In this paper we demonstrate that the performance of our suggested approach with a priori bias is in general as good as, or even for many test examples better than, the performance of RBF with a posteriori bias. Using our approach, it is clear that the global response is modelled with the bias and that the details are captured with radial basis functions. The accuracy of the two approaches are investigated by using multiple test functions with different degrees of dimensionality. Furthermore, several modeling criteria, such as the type of radial basis functions used in the RBFs, dimension of the test functions, sampling techniques and size of samples, are considered to study their affect on the performance of the approaches. The power of RBF with a priori bias for surrogate based design optimization is also demonstrated by solving an established engineering benchmark of a welded beam and another benchmark for different sampling sets generated by successive screening, random, Latin hypercube and Hammersley sampling, respectively. The results obtained by evaluation of the performance metrics, the modeling criteria and the presented optimal solutions, demonstrate promising potentials of our RBF with a priori bias, in addition to the simplicity and straight-forward use of the approach.
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| 10. |
- Andersson, Joacim, 1978-, et al.
(författare)
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The 'body pedagogics' of an elite footballer's career path - analysing Zlatan Ibrahimovic's biography
- 2017
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Ingår i: Physical Education and Sport Pedagogy. - : Taylor & Francis. - 1740-8989 .- 1742-5786. ; 22:5, s. 502-517
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Tidskriftsartikel (refereegranskat)abstract
- Background: Pedagogical research on career is encouraged to not limit sport learning to athletic skills, coaching effectiveness and coach–athlete relationships, but to also focus on learning in a multidimensional sense in the context of an athlete’s individual and social biography. This article examines an elite athlete’s career path as a body pedagogic phenomenon involving processes of self-transformation in relation to practical, social and embodied environments.Purpose: The purpose is to analyse the career path of the elite footballer Zlatan Ibrahimovic by focusing on how different learning environments relate to different embodiments of techniques and skills and how values and norms shape professionalism.Theoretical frameworks: A combined framework of body pedagogics and John Dewey’s theory of aesthetic experience is used to understand an elite career path as a learning trajectory involving different self-transformation means. Hence, the elite athlete is viewed as a career climber who creates his own educational pathway and engages in processes of participating, acquiring and becoming.Data analysis: A practical epistemology analysis (PEA) with a focus on aesthetic judgements is used to analyse the narrative of Zlatan’s career path as it is portrayed in the biography I Am Zlatan: My Story on and Off the Field. One major theme is identified, namely that Zlatan develops from being a dribbler to a striker. Against this background, Zlatan Ibrahomovic’s self-transformation is scrutinised in relation to three different sub-themes (suburb, arena and team) in three different ways (auto-didactic, education and educator) to create distinct and heterogeneous forms of knowledge in support of professional artistry.Results: The analysis offers an elaborated empirical description of how the means and ends of self-transformation develop reciprocally throughout Zlatan’s elite career and how this relates to practical, social and embodied environments. Examples of body pedagogic outcomes are: (1) different commitments to training, team culture and the coach–athlete relationship (social), (2) that Zlatan uses his dribbling skills more purposefully for scoring goals and satisfying the coach (embodied) and (3) that he is able to win different leagues and titles with different teams (practical).
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