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

Towards a Framework for Open Data Publishers:A Comparison Study between Sweden and Belgium

Public organizations in the role of publishers publish datafor anyone to reuse, which can lead to benets. However, the processdescriptions for this publishing work focus on one or a few issues, whichleaves out important areas and decisions. Little seems to be known aboutvariations between publishers based on one common point of comparison.Therefore, this paper presents a comparison between two publishers:Namur (Belgium) and Linkoping (Sweden). The comparison is based ona process framework, seven in-depth interviews, document studies, anda verication meeting with one respondent. We learned that the OGD manager is an agent of change who need to balance implementation andguidance, the orthodox method of e-mail registration can be used toengage users and monitor impact, the organizational unit for OGD iscross-organizational, and the publisher process framework could be usedas ex-ante strategic guidelines and context-specic recommendations

ПРИМЕНЕНИЕ СТЕКЛОПЛАСТИКОВ В АВТОТРАКТОРНЫХ КОНСТРУКЦИЯХ

The period of high technology development sees large-scale works concerning replacement of conventional materials applied in engineering, in other words metals are replaced by progressive polymer and composite materials, various plastics.Composite materials have found their new application with every passing day in aircraft industry, shipbuilding, electrical engineering, radio engineering, automobile and tractor industry and in other industries displacing conventional ones.Glass-reinforced plastic is considered as one of sufficiently available and widely applicable composite materials because products made of this material are characterized by high physical and mechanical strength indices that surpass steel in performance. This material is not subjected to corrosion and it is resistant to chemically hostile media and environment. These factors determine glass-reinforced plastic longevity. Appearance of a final product plays rather significant role in selection of the required material. Glass-reinforced plastic products can have various shapes preserving their rigidity, strength and small weight.The paper contains a comparative analysis of glass-reinforced plastic properties and it reveals physical and mechanical characteristics of products made of glass-reinforced plastic. The paper also describes peculiar features of glass-reinforced plastic products and their advantages.В период развития высоких технологий ведутся широкомасштабные работы по замене традиционных материалов, применяемых в технике, т. е. металлов, на прогрессивные полимерные и композиционные материалы, различные пластмассы.В авиастроении, судостроении, электротехнике, радиотехнике, автотракторостроении и других областях промышленности композиционные материалы с каждым днем находят все новое применение, вытесняя традиционные материалы.Один достаточно доступный и широко применяемый из композиционных материалов – стеклопластик. Изделия из этого материала имеют высокие физико-механические показатели прочности, по которым могут превосходить сталь. Он не подвержен коррозии, устойчив к химически агрессивным средам, стоек к воздействию окружающей среды. Эти факторы определяют долговечность стеклопластика. Далеко не последнее место при выборе материала занимает внешний вид конечного изделия. Изделия из стеклопластика можно изготавливать любой формы, при этом сохраняя жесткость, прочность и малый вес.Проведен сравнительный анализ свойств стеклопластика.  Показаны физико-механические характеристики изделий из стеклопластика. Описаны особенности изделий из стеклопластика и их преимущества

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

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

Driving Innovation through Big Open Linked Data (BOLD): Exploring Antecedents using Interpretive Structural Modelling

YesInnovation is vital to find new solutions to problems, increase quality, and improve profitability. Big open linked data (BOLD) is a fledgling and rapidly evolving field that creates new opportunities for innovation. However, none of the existing literature has yet considered the interrelationships between antecedents of innovation through BOLD. This research contributes to knowledge building through utilising interpretive structural modelling to organise nineteen factors linked to innovation using BOLD identified by experts in the field. The findings show that almost all the variables fall within the linkage cluster, thus having high driving and dependence powers, demonstrating the volatility of the process. It was also found that technical infrastructure, data quality, and external pressure form the fundamental foundations for innovation through BOLD. Deriving a framework to encourage and manage innovation through BOLD offers important theoretical and practical contributions

Синтез 5-арилизоксазол-3-карбоксилатов длинноцепных первичных спиртов

Synthesis of 5-arylisoxazole-3-carboxylates of the long chain primary alcohols hav been described.Представлен синтез 5-арилизоксазол-3-карбоксилатов длинноцепных спиртов, полученных этерифика- цией додекан-1-ола, пентадекан-1-ола, гексадекан-1-ола и гептадекан-1-ола хлорангидридами 5-арилизоксазол-3-карбоновых кислот в среде сухого диэтилового эфира в присутствии триэтиламина при 20-23 °С с выходом78-89%

Revisiting Coupling Selection Rules in Heterotic Orbifold Models

We study L-point couplings between twisted sector fields in heterotic orbifold compactifications, using conformal field theory. Selection rules provide an easy way to identify which couplings are non-vanishing. Those used in the current literature are gauge invariance, R-charge conservation and the space group selection rule, but they are not the whole story. We revive and refine a fourth selection rule, due to symmetries in the underlying torus lattice, and introduce a fifth one, due to the existence or not of classical worldsheet instanton solutions to mediate the couplings. We consider briefly the phenomenological consequences of the additional rules, in particular for recent orbifold constructions whose field content correspond to that of the MSSM. The structure of the exotic mass matrices is unaltered and many dimension-5 proton-decay operators vanish.Comment: 27 pages, v2: several clarifications, matches JHEP version. v3: supercedes journal version, erratum to appear in JHEP; correction to "rule 5" equations, main ideas unchange

Mechanisms for primordial black hole production in string theory

We consider mechanisms for producing a significant population of primordial black holes (PBHs) within string inspired single field models of inflation. The production of PBHs requires a large amplification in the power spectrum of curvature perturbations between scales associated with CMB and PBH formation. In principle, this can be achieved by temporarily breaking the slow-roll conditions during inflation. In this work, we identify two string setups that can realise this process. In string axion models of inflation, subleading non-perturbative effects can superimpose steep cliffs and gentle plateaus onto the leading axion potential. The cliffs can momentarily violate the slow-roll conditions, and the plateaus can lead to phases of ultra slow-roll inflation. We thus achieve a string motivated model which both matches the Planck observations at CMB scales and produces a population of light PBHs, which can account for an order one fraction of dark matter. In DBI models of inflation, a sharp increase in the speed of sound sourced by a steep downward step in the warp factor can drive the amplification. In this scenario, discovery of PBHs could indicate non-trivial dynamics in the bulk, such as flux-antibrane annihilation at the tip of a warped throat

Anti-D3 branes and moduli in non-linear supergravity

Anti-D3 branes and non-perturbative effects in flux compactifications spontaneously break supersymmetry and stabilise moduli in a metastable de Sitter vacua. The low energy 4D effective field theory description for such models would be a supergravity theory with non-linearly realised supersymmetry. Guided by string theory modular symmetry, we compute this non-linear supergravity theory, including dependence on all bulk moduli. Using either a constrained chiral superfield or a constrained vector field, the uplifting contribution to the scalar potential from the anti-D3 brane can be parameterised either as an F-term or Fayet-Iliopoulos D-term. Using again the modular symmetry, we show that 4D non-linear supergravities that descend from string theory have an enhanced protection from quantum corrections by non-renormalisation theorems. The superpotential giving rise to metastable de Sitter vacua is robust against perturbative string-loop and $\alpha'$ corrections.Comment: 33 page