Genuine Non-Self-Averaging and Ultra-Slow Convergence in Gelation

In irreversible aggregation processes droplets or polymers of microscopic size successively coalesce until a large cluster of macroscopic scale forms. This gelation transition is widely believed to be self-averaging, meaning that the order parameter (the relative size of the largest connected cluster) attains well-defined values upon ensemble averaging with no sample-to-sample fluctuations in the thermodynamic limit. Here, we report on anomalous gelation transition types. Depending on the growth rate of the largest clusters, the gelation transition can show very diverse patterns as a function of the control parameter, which includes multiple stochastic discontinuous transitions, genuine non-self-averaging and ultra-slow convergence of the transition point. Our framework may be helpful in understanding and controlling gelation.Comment: 8 pages, 10 figure

Search for a SM Higgs boson in the diphoton plus EMISS T channel

In this paper I discuss the search for a Standard Model (SM) Higgs boson in the diphoton plus missing transverse energy (missing ET or EMISS T ) channel using 20.7 fb−1 of data recorded by the ATLAS detector in the year 2012. Higgs boson at LHC can be generated through different processes: gluon-gluon fusion (∼ 85%), vector boson fusion (∼ 10%), W/Z associated production (∼ 5%) and top-antitop fusion (< 1%). The applied selection is optimized to isolate events from Higgs boson production associated with a W or Z boson requiring the presence of EMISS T from Z/W decay into neutrinos in addition to two isolated energetic photons. The sensitivity of this analysis is presented and found to be at a level above 5 times the predicted Standard Model cross-section

Kinks and waterfalls as signatures of competing order in angle-resolved photoemission spectra of La_{2-x}Sr_xCuO_4

We show that the so-called kinks and waterfalls observed in angle-resolved photoemission spectra of La2-xSrxCuO4, a prototypical high-Tc superconducting cuprate, result from the coupling of quasiparticles with two distinct nearly critical collective modes with finite characteristic wave vectors, typical of charge and spin fluctuations near a stripe instability. Both phonon-like charge and spin collective modes are needed to account for the kinked quasiparticle dispersions. This clarifies the long-standing question whether kinks are due to phonons or spin waves and the nature of the bosonic mediators of the electron-electron effective interaction in La2-xSrxCuO4.Comment: 5 pages, 4 figure

Ariadne Cast Away

Research Background : This art work includes an extract from a poem written for my doctoral thesis which re-considers the Greek myth of Ariadne in view of ecocritical concepts and as a narrative of relationship breakdown and emotional abuse. It uses natural materials, including a dried lizard which perished in the sun, wax and crushed shell to highlight the significance of the natural world to the work. The subject of this part of the poem is abandonment, both in relationships and in nature. Research Contribution : The work makes a contribution by entering in to the review of the Greek myth of Ariadne, which was subject of The Ariadne Project 2014, undertaken by ABC Radio National as a 360 documentary. This research reconsiders the Greek story in a contemporary context and is part of its ongoing evolution as a narrative in our culture. Research Significance : This work is within the tradition of the Heidelberg School 9x5 impressionist exhibition. It is part of an exhibition of 80 works including artists with disability that were auctioned to arts professionals and community members on 19/9/14. This work was sold for $62, which was above the average price. It demonstrates the university\u27s commitment to inclusivity and community engagement

Localização de espécies florestais nativas em fragmentos da Floresta Ombrófila Mista no território centro-sul do Paraná.

EVINCI. Resumo

Defect-Seeded Atomic Layer Deposition of Metal Oxides on the Basal Plane of 2D Layered Materials

Atomic layer deposition (ALD) on mechanically exfoliated 2D layered materials spontaneously produces network patterns of metal oxide nanoparticles in triangular and linear deposits on the basal surface. The network patterns formed under a range of ALD conditions and were independent of the orientation of the substrate in the ALD reactor. The patterns were produced on MoS2 or HOPG when either tetrakis(dimethylamido)titanium or bis(ethylcyclopentadienyl)manganese were used as precursors, suggesting that the phenomenon is general for 2D materials. Transmission electron microscopy revealed the presence, prior to deposition, of dislocation networks along the basal plane of mechanically exfoliated 2D flakes, indicating that periodical basal plane defects related to disruptions in the van der Waals stacking of layers, such as perfect line dislocations and triangular extended stacking faults networks, introduce a surface reactivity landscape that leads to the emergence of patterned deposition