1,267 research outputs found
The monitoring task in automated checkout of space vehicles
Man-machine system - human monitoring tasks in automatic checkout of space vehicle
Organizing Retrieval Conferences: Action Research Process of Knowledge Development
Also PCMA Working Paper #31.http://deepblue.lib.umich.edu/bitstream/2027.42/51227/1/461.pd
Marital status and suicidal ideation among Australian older adults: the mediating role of sense of belonging
See also Corrigendum: Suzanne McLaren, Rapson Gomez, Peter Gill and Jessica Chesler (2015). Marital status and suicidal ideation among Australian older adults: the mediating role of sense of belonging – CORRIGENDUM. International Psychogeriatrics, 27, pp 155-155. doi:10.1017/S1041610214002166
Distinct contiguous versus separated triplet-pair multiexcitons in an intramolecular singlet fission chromophore
We show from many-body quantum mechanical calculations that there occur
structurally distinct triplet-pair eigenstates in the intramolecular singlet
fission (iSF) compound pentacene-tetracene-pentacene. Triplet excitons occupy
neigboring pentacene and tetracene monomers in the higher energy doubly
degenerate triplet-triplet multiexcitons, and terminal pentacene chromophores
in the lower energy multiexciton. The lowest energy multiexciton is reached by
ultrafast triplet migration within the triplet-triplet manifold, a result with
profound implication for the design of superior iSF compounds
Thermalization from gauge/gravity duality: Evolution of singularities in unequal time correlators
We consider a gauge/gravity dual model of thermalization which consists of a
collapsing thin matter shell in asymptotically Anti-de Sitter space. A central
aspect of our model is to consider a shell moving at finite velocity as
determined by its equation of motion, rather than a quasi-static approximation
as considered previously in the literature. By applying a divergence matching
method, we obtain the evolution of singularities in the retarded unequal time
correlator , which probes different stages of the thermalization. We
find that the number of singularities decreases from a finite number to zero as
the gauge theory thermalizes. This may be interpreted as a sign of decoherence.
Moreover, in a second part of the paper, we show explicitly that the thermal
correlator is characterized by the existence of singularities in the complex
time plane. By studying a quasi-static state, we show the singularities at real
times originate from contributions of normal modes. We also investigate the
possibility of obtaining complex singularities from contributions of
quasi-normal modes.Comment: 35 pages, 4 figure
Structural basis of N-Myc binding by Aurora-A and its destabilization by kinase inhibitors
Myc family proteins promote cancer by inducing widespread changes in gene expression. Their rapid turn-over by the ubiquitin-proteasome pathway is regulated through phosphorylation of Myc Box I and ubiquitination by SCFFbxw7. However, N-Myc protein is stabilized in neuroblastoma by Aurora-A kinase in a manner that is sensitive to certain Aurora-A-selective inhibitors. Here we identify a direct interaction between the catalytic domain of Aurora-A and a site flanking Myc Box I that also binds SCFFbxw7. We determine the crystal structure of the complex between Aurora-A and this region of N-Myc to 1.72 Ã… resolution. The structure indicates that the conformation of Aurora-A induced by compounds such as alisertib and CD532 is not compatible with binding of N-Myc, explaining the activity of these compounds in neuroblastoma cells and providing a rational basis for the design of cancer therapeutics optimized for destabilization of the complex. We also propose a model for the stabilization mechanism in which binding to Aurora-A alters how N-Myc interacts with SCFFbxw7 to disfavor the generation of Lys48-linked poly-Ub chains
Teaching and Assessing Engineering Design Thinking with Virtual Internships and Epistemic Network Analysis
An engineering workforce of sufficient size and quality is essential for addressing significant global challenges such as climate change, world hunger, and energy demand. Future generations of engineers will need to identify challenging issues and design innovative solutions. To prepare young people to solve big and increasingly global problems, researchers and educators need to understand how we can best educate young people to use engineering design thinking. In this paper, we explore virtual internships, online simulations of 21st-century engineering design practice, as one method for teaching engineering design thinking. To assess the engineering design thinking, we use epistemic network analysis (ENA), a tool for measuring complex thinking as it develops over time based on discourse analysis. The combination of virtual internships and ENA provides opportunities for students to engage in authentic engineering design, potentially receive concurrent feedback on their engineering design thinking, and develop the identity, values, and ways of thinking of professional engineers
The Connectedness of Ivory Towers and Inner Cities - Conversations About Us and Them
Also PCMA Working Paper #46.http://deepblue.lib.umich.edu/bitstream/2027.42/51291/1/527.pd
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