Surface plasmon resonance in gold nanoparticle infiltrated dielectric opals

Light reflectance in three-dimensional metallo-dielectric photonic crystals of polyelectrolyte-coated latex spheres infiltrated with gold nanoparticles has been studied. Broad directional reflectance bands associated with the surface plasmon resonance in the lattice of the gold nanoparticle shells are observed in a wavelength range well separated from the diffraction resonance of the opal lattice. Dependence of surface plasmon resonance spectra on the Au nanoparticle distribution has been demonstrated

Inorganic–organic nanocomposites of CdSe nanocrystals surface-modified with oligo- and poly(fluorene) moieties

We report a facile grafting-from strategy towards the synthesis of inorganic–organic composites of semiconductor nanocrystals and wide-bandgap polymers. Amino-functional fluorenes have been used as co-ligands for CdSe nanocrystals, thus enabling us to design their surface directly during the synthesis. Highly monodisperse, strongly emitting CdSe nanocrystals have been obtained. Subsequently, a straightforward Yamamoto C–C coupling protocol was used to carry out surface polymerisation, hence modifying CdSe nanocrystals with oligo- and poly(fluorene) moieties. Both amino-fluorene capped CdSe nanocrystals and the resulting nanocrystal–polymer composites were characterized in detail by optical and FT-IR spectroscopy, TEM, AFM, and gel permeation chromatography, showing their potential as novel functional inorganic–organic hybrid materials

Weed management in maize (Zea mays ) in western Indo-Gangetic Plains through tank-mix herbicide application

To evaluate the bio-efficacy of pre-emergence tank-mix and sequential application (pre-emergence followed by (fb) post-emergence) of herbicides on weeds particularly Cyperus rotundus L. in maize (Zea mays L.), a field experiment was conducted in 2010 and 2011 at the Indian Agricultural Research Institute, New Delhi. It was observed that the tank-mix pre-emergence application of pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ha with or without KNO3 (6%) and pendimethalin 0.75 kg/ha + chlorimuron-p- ethyl 0.006 kg/ha resulted in significant suppression of Cyperus rotundus, broad leaved and grassy weeds, and caused a significant reduction in total weed population and dry weight. These tank-mixes were superior to other weed control treatments and resulted in higher weed control efficiency and weed control index. However, the pre-emergence tank-mix application of pendimethalin 0.75 kg/ha + imazethapyr 0.050 kg/ ha resulted in comparable maize yield with weed-free check in both years, but the yields in this treatment were higher than in other weed control treatments. This treatment, excluding weed-free check, resulted in the highest net returns and net benefit:cost. Atrazine 1.0 kg/ha + mustard residue mulch @ 5 tonnes/ha was the next best treatment, resulting in higher maize yield through concurrent reduction in weed competition

Efficient energy transfer in layered hybrid organic/inorganic nanocomposites: A dual function of semiconductor nanocrystals

The efficiency of energy transfer in hybrid organic/inorganic nanocomposites based on conjugated polymers and semiconductor nanocrystals is strongly dependent on both the energy transfer rate and the rate of the nonradiative recombination of the polymer. We demonstrate that the polymer nonradiative recombination can be reduced by the suppression of exciton diffusion via proper morphology engineering of a hybrid structure. In the layer-by-layer assembled nanocomposite of a conjugated polymer and CdTe nanocrystals the latter have a dual role: first, they are efficient exciton acceptors and, second, they reduce nonradiative recombination in the polymer by suppressing exciton diffusion across the layers.Fil: Lutich, Andrey A.. Ludwig Maximilians Universitat; AlemaniaFil: Pöschl, Andreas. Ludwig Maximilians Universitat; AlemaniaFil: Jiang, Guoxin. Ludwig Maximilians Universitat; AlemaniaFil: Stefani, Fernando Daniel. Ludwig Maximilians Universitat; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Susha, Andrei S.. City University of Hong Kong; ChinaFil: Rogach, Andrey L.. City University of Hong Kong; ChinaFil: Feldmann, Jochen. Ludwig Maximilians Universitat; Alemani

Demonstration of autonomic dysfunction syndrome among the students of the special educational department

Here we present the examination material of autonomic dysfunction syndrome demonstrated among the first-year students of the special educational department, determine the physical education means useful for elimination of functional disorders which are results of violation of the vascular tone regulationПредставлен материал по исследованию наличия и проявления вегетативной дисфункции у студенток первого курса специального учебного отделения высшего образования, определены средства физической культуры для устранения функциональных расстройств, вызванных нарушением регуляции сосудистого тонус

Study degree demonstration of autonomic dysfunction syndrome among the students of the special educational department

Here we present the examination material of autonomic dysfunction syndrome demonstrated among the first-year students of the special educational department, determine the physical education means useful for elimination of functional disorders which are results of violation of the vascular tone regulationПредставлен материал исследования наличия и проявления вегетативной дисфункции у студенток первого курса специального учебного отделения, определены средства физической культуры для устранения функциональных расстройств, вызванных нарушением регуляции сосудистого тонус

Deep multi-scale face detector based on deep neural network

Целью настоящей работы являлось проектирование глубокой искусственной нейронной сети для детектирования лиц. Основное внимание при проектировании было уделено обеспечению высокой производительности и уменьшению требуемых вычислительных затрат за счет: 1) факторизации операции свертки; 2) применения точечных сверток; 3) комбинирования поканальных и точечных сверток. Разработанный детектор сравнивался со схожими детекторами лиц, полученными на основе широко распространенных архитектур нейронных сетей MobileNet и NasNet. Предложенная архитектура детектора лиц имеет вычислительную сложность 5.1 MFLOPs, что в два раза меньше, чем у MobileNet (11.7 MFLOPs) и в четыре раза меньше, чем у NasNet (22 MFLOPs). Соответственно время детектирования на изображении 416×416 составило 5.12 мс (или 195 FPS) с видеокарты GeForce 1080 Ti, а также 65.4 мс (или 15 FPS) на одном ядре процессора Intel Core i7-8700K. При этом точность нашей архитектуры равна 85% и уступает MobileNet лишь на 4%, а NasNet – на 9.5%. The main objective of this work was a development of a deep artificial neural network for face detection purposes. The focus of its design was made on providing of the high performance of the detector and lowering of its computational power requirements by using: 1) factorization of convolution; 2) pointwise convolution; 3) combination of depthwise and pointwise convolution. The detector was compared with similar face detectors based on other well-known neural network architectures MobileNet and NasNet. The proposed face detector has a computational complexity equalling 5.1 MFLOPs, which is two times less than MobileNet’s one (11,7 MFLOPs) and four times less than NasNet’s one (22 MFLOPs). The detection time for 416 × 416 image was 5.12 ms (or 195 FPS) using GPU GeForce 1080 Ti, and 65.4 ms (or 15 FPS) using one processor core of Intel Core i7-8700K. The precision of our design is 85% and less on 4% than MobileNet has, and less on 9.5% than NasNet has

Increasing transparency through the open city toolkit

Degbelo, A., Granell, C., Trilles, S., Bhattacharya, D., & Wissing, J. (2020). Tell Me How My Open Data Is Re-used: Increasing Transparency Through the Open City Toolkit. In S. Hawken, H. Han, & C. Pettit (Eds.), Open Cities, Open Data: Collaborative Cities in the Information Era (pp. 311-330). [Chapter 14] Springer Singapore. https://doi.org/10.1007/978-981-13-6605-5_14The Open Data movement has been gaining momentum in recent years, with increasingly many public institutions making their data freely accessible. Despite much data being already open (and more to come), finding information about the actual usage of these open datasets is still a challenge. This chapter introduces two tools of the Open City Toolkit (OCT) that tackle this issue: a tool to increase transparency and interactive guidelines. Interviews with city council employees confirmed the utility of the transparency tool. Both tools can be used by city councils (for planning purposes) and by users interested to know more about the value of current open datasets (for information purposes).authorsversionpublishe

SUSY Breaking and Moduli Stabilization from Fluxes in Gauged 6D Supergravity

We construct the 4D N=1 supergravity which describes the low-energy limit of 6D supergravity compactified on a sphere with a monopole background a la Salam and Sezgin. This provides a simple setting sharing the main properties of realistic string compactifications such as flat 4D spacetime, chiral fermions and N=1 supersymmetry as well as Fayet-Iliopoulos terms induced by the Green-Schwarz mechanism. The matter content of the resulting theory is a supersymmetric SO(3)xU(1) gauge model with two chiral multiplets, S and T. The expectation value of T is fixed by the classical potential, and S describes a flat direction to all orders in perturbation theory. We consider possible perturbative corrections to the Kahler potential in inverse powers of $Re S$ and $Re T$, and find that under certain circumstances, and when taken together with low-energy gaugino condensation, these can lift the degeneracy of the flat direction for $Re S$. The resulting vacuum breaks supersymmetry at moderately low energies in comparison with the compactification scale, with positive cosmological constant. It is argued that the 6D model might itself be obtained from string compactifications, giving rise to realistic string compactifications on non Ricci flat manifolds. Possible phenomenological and cosmological applications are briefly discussed.Comment: 32 pages, 2 figures. Uses JHEP3.cls. References fixed and updated, some minor typos fixed. Corrected minor error concerning Kaluza-Klein scales. Results remain unchange