3,635 research outputs found
The people behind the papers - Yonit Maroudas-Sacks and Marko Popovic
No full textDuring Hydra regeneration, supracellular actomyosin fibres are disoriented at two distinct foci of the regenerating tissue. These sites of nematic topological defects eventually form the new head and foot of the regenerated animal. In a new study, Yonit MaroudasSacks, Marko Popovic, Kinneret Keren and colleagues propose a positive-feedback loop that incorporates fibre organisation, tissue strain and morphogen gradients to promote head organiser formation. To find out more about the work, we caught up with first author Yonit Maroudas-Sacks and co-corresponding author Marko Popovic, Group Leader at the Max Planck Institute for the Physics of Complex Systems, Germany
Angular Momentum in Human Walking
No full textThis paper, written by Hugh Herr and Marko B. Popovic, provides a comprehensive study of human walking that focuses on whole-body rotational behavior. The researcher used a 16-segment human model and data on gait from human participants to examine segmental contributions to whole-body angular momentum. This paper also includes equations, figures and tables
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Actuation, Control and Environment Setup for a bi-joint hydro-muscle driven leg structure
No full textAbout 74 million of the world population needs assistive leg devices on daily basis on account of some form of disability. Although the standard wheelchairs perform well on level ground terrains but they prove ineffective on soft ground and in crossing large obstacles. For dealing with the advance challenges of navigating the human environment a biped walker seems to a more suitable choice. The research presented here is focused on building and actuating a two-joint leg structure that is an integral part of ongoing leg-chair project in Popovic Labs. The project provides a proof of concept that how the synthetic hydro muscles (also developed by Popovic Labs) can be used for the control of large artificial limb joints. Here we discuss the designing, testing and corresponding refining of electronics design, actuation and control of the bi-joint hydro muscle actuated leg structure .We will also elaborate on the requirements, design, problems and refinement of some of the important mechanical components like Coupler/Decoupler and Force Multipliers
Empirical investigations into intuitive interaction: a summary
No full textIntuition is a type of cognitive processing that is often non-conscious and utilises stored experiential knowledge. Intuitive interaction involves the use of knowledge gained from other products and/or experiences. We have developed novel approaches and techniques for studying intuitive use of interfaces, and shown that intuitive interaction is based on past experience with similar things (Blackler, Popovic, and Mahar, 2003a, b, 2004a, b, 2005). Two initial experimental studies revealed that prior exposure to products employing similar features helped participants to complete set tasks more quickly and intuitively, and that familiar features were intuitively used more often than unfamiliar ones. A third experiment revealed that appearance of features seems to be the variable that most affects time spent on a task and intuitive uses. Based on our empirical work, we have developed principles and tools for designers to assist them in making interfaces more intuitive
Tito, Josip Broz --1967-68 -- Correspondence, Individual -- letter, 1967-11-17
No full textLetter from Sabin, Albert B. to Popovic, Vladimier dated 1967-11-17.Sabin Collection Fair Use Policy</a
Multivariate Control of Transcript to Protein Variability in Single Mammalian Cells
No full textSingle-cell features measurements that accompany manuscript "Multivariate Control of Transcript to Protein Variability in Single Mammalian Cells" by D Popovic, B Koch, M Kueblbeck, J Ellenberg and L Pelkmans.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV
1Thanks to 2D and maybe even beyond: 115 GeV and 140 GeV almost Standard Model Higgs without problems
No full textI address four key points: (1) dynamical and likely local Higgs mass generation (potentially in 2D) as resolution to the 4D hierarchy and vacuum energy problems, (2) possibility that top condensation may be explained by an interplay among the QCD gluon and scalar sectors, (3) the Higgs Mass Zero Crossing (HMZC) scale, ̱ , and (4) two preferred Higgs mass regions centered at Ǥand Ǥwith related high energy models. I show that Standard Model (SM) in 2D could simultaneously satisfy (a) complete radiative generation of the Higgs mass via top loop and (b) cancelation of the remaining leading order corrections to the scalar propagator. The Higgs mass, parameterized with k=1 (2), in the leading order is Ǥ േ Ǥ (Ǥ േ Ǥ). I show that SM top anti-top condensation is consistent with gluon and Higgs mediated top-anti top interactions at tree level. I predict the QCD fine structure constant up to precision better than 2 % with the mean value surprisingly only 0.25 % away from the world average value at √ ൌ . The SM driven theory at energies larger than the HMZC scale, ̱ , necessary includes effective tachyonic Higgs (Popovic 2001). Here, I map the SM physical Higgs mass to the low energy HMZC scale (Ǥૡ െ Ǥૡ). I show that very “long lived ” SM, valid up to the Planck scale, necessitates (a) Higgs heavier than ૠǤേ Ǥૡ due to the vacuum stability, (b) Higgs lighter than ૠ േ due to the perturbativity and (c) Higg
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