483 research outputs found
On a Dirichlet problem for composite type equation
No full textО.С. Зикиров, Национальный университет Узбекистана, Ташкент, Узбекистан
E-mail: [email protected]. O.S. Zikirov,
National University of Uzbekistan, Tashkent, Uzbekistan
E-mail: [email protected]Исследуется краевая задача для класса уравнений третьего порядка составного типа с эллиптическим оператором в главной части. Доказаны теоремы существования и единственности классического решения для рассматриваемых задач. Доказательство основано на энергетических неравенствах и на теории интегральных уравнений фредгольмовского типа. The aim of this paper is to prove the existence and uniqueness of smooth solutions to the Dirichlet
type problem for one class of third-order equations that do not belong to any of the classic types. One of
the main classes of non-classical equations is third-order composite type equations, the operator of
which is a composition of first-order hyperbolic operator and an elliptic operator in the main part. A
number of boundary value problems for the model composite type equations with the Laplace operator
were investigated by T.D. Dzhuraev. Many studies have proved the existence of solutions to boundary
value problems upon fulfillment of conditions of the convexity of area boundary. The method of proof
used in this paper is similar to the method used in the research paper of the author mentioned above. For
the research of composite type linear equations a combination of the method of potentials (Green's function)
and integral identities is applied. The research method is based on reducing the studied problem
with the help of the Green's function to an integral equation, the proof of its solubility and thus - the
proof of the solvability of original problem.
Upon fulfillment of certain conditions on given functions, a third-order equation reduces to a
second-order equation of elliptic type with an unknown right-hand side and the boundary function. With
the help of Green's functions for elliptic equations, the studied problem is reduced to a second-order
equivalent integral equation, the solvability follows from Fredholm alternative and the theorem of uniqueness
of the solution of the original problem
K-loops: Loop Transformations for Reconfigurable Architectures
No full textThe focus of this dissertation is on kernel loops (K-loops), which are loop nests that contain hardware mapped kernels in the loop body. In this thesis, we propose methods for improving the performance of such K-loops, by using standard loop transformations for exposing and exploiting the coarse grain loop level parallelism. We target a reconfigurable architecture that is a heterogeneous system consisting of a general purpose processor and a field programmable gate array (FPGA). Research projects targeting reconfigurable architectures are trying to give answers to several problems: how to partition the application -- decide which parts to be accelerated on the FPGA, how to optimize these parts (the kernels), what is the performance gain. However, only few try to exploit the coarse grain loop level parallelism. This work goes towards automatically deciding the number of kernel instances to place into the reconfigurable hardware, in a flexible way that can balance between area and performance. In this dissertation, we propose a general framework that helps determine the optimal degree of parallelism for each hardware mapped kernel within a K-loop, taking into account area, memory size and bandwidth, and performance considerations. In the future it can also take into account power. Furthermore, we present algorithms and mathematical models for several loop transformations in the context of K-loops. The algorithms are used to determine the best degree of parallelism for a given K-loop, while the mathematical models are used to determine the corresponding performance improvement. The algorithms are validated with experimental results. The loop transformations that we analyze in this thesis are loop unrolling, loop shifting, K-pipelining, loop distribution, and loop skewing. An algorithm that decides which transformations to use for a given K-loop is also provided. Finally, we also present an analysis of possible situations and justifications of when and why the loop transformations have or have not a significant impact on the K-loop performance.Microelectronics & Computer EngineeringElectrical Engineering, Mathematics and Computer Scienc
Facility Management van de Universiteit van Suriname
No full textVoor de Universiteit van Suriname moest een informatiesysteem opgezet worden om de faciliteiten aldaar te beheren. Hiervoor is gekeken naar de huidige manier van werken en de beschikbare technologieën, waarna het systeem ontworpen en geïmplementeerd is. Hierbij is de nadruk gelegd op de onderhoudbaarheid en mogelijkheid tot verdere ontwikkeling van dit systeem.Software TechnologyElectrical Engineering, Mathematics and Computer Scienc
Investment function of economic growth in Russia
No full textThe intensification of investment dynamics is a determining factor in the new growth model of the Russian economy. The Covid crisis has greatly limited the opportunities to use this factor and made restoring growth dynamics an urgent task. The aim of the study is to determine the investment function of the Russian economy before the Covid crisis in order to identify the main instruments of the investment policy of growth in the post-crisis period. The research methods are macroeconomic and regression analysis based on software Gretl 2020b, which helped to choose the investment function according to the instrument-factors. Solving the problem of collinearity of multiple regression factors makes it possible to select the best models for GDP and investment in fixed assets of the Russian economy. The research result is selected multivariate models of gross product and investment that allow considering the impact of the following instruments on the goal’s function: monetization level, key interest rate, exchange rate, risk, profitability, oil prices, financial investments, inflation. The author concludes that an increase in the monetization of the economy, a decrease in the key interest rate, and a controlled devaluation generally had a positive effect on the amount of investment in fixed assets. The investment growth increased the risk of economic activity; the decrease in profitability relatively decreased investment and increased Russia’s GDP with an increased risk over the considered time interval. When implementing investment policy, one should consider these features along with the specified macro-aggregates, the structure of investment distribution between sectors and types of investments, for example, in financial and non-financial assets. The paper shows the significance of this condition, which affects the effectiveness of the investment policy, when the shift in investment towards financial assets accompanies the slowdown in economic growth. The prospect of further research is an assessment of the equalization of sectoral risks affecting the distribution of investments and investment dynamics. © Sukharev O.S., 202
Humans Disagree With the IoU for Measuring Object Detector Localization Error
No full textThe localization quality of automatic object detectors is typically evaluated by the Intersection over Union (IoU) score. In this work, we show that humans have a different view on localization quality. To evaluate this, we conduct a survey with more than 70 participants. Results show that for localization errors with the exact same IoU score, humans might not consider that these errors are equal, and express a preference. Our work is the first to evaluate IoU with humans and makes it clear that relying on IoU scores alone to evaluate localization errors might not be sufficient.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Pattern Recognition and BioinformaticsWeb Information System
Цифровые двойники в здравоохранении: оценка технологических и практических перспектив
No full textBackground. The technological direction digital Twins is included in the list of the main strategic technological trends of 20192021. At the end of 2021, an initiative was announced in the Russian Federation aimed at creating a digital twin in the domestic healthcare system as part of the primary care modernization project. Aims the purpose of the study is to review possible ways of using digital twins technology in the global healthcare system and in its Russian segment, as well as to build patent and publication landscapes to identify technological and academic leaders of the frontier. Methods. Scientometric and patent analysis. Results. The key stages of the development of the frontier digital twins in healthcare are traced. According to the data of the scientometric and patent analyses carried out in the priority direction digital twins in healthcare and medicine, the Russian Federation at the end of 2021 ranks 35th in the world in terms of specific weight in the total number of articles in publications indexed in WoS, and 20th in the world in terms of specific weight in the total number of patent applications for an invention, i.e. it is not among the 10 leading countries. The citation of domestic publications in the internationalized segment is significantly lower than the average (normalized) indicator, which does not give grounds to talk about the achievement of research excellence and even world-class domestic competence centers. Conclusion. The creation of the Digital Healthcare Consortium in 2018, the world-class Scientific Center Digital Biodesign and Personalized Healthcare in 2020 and the initiative of the regulator (Ministry of Health of Russia) in 2021 should be noted as key events in the development of the frontier in the Russian Federation. At the same time, it is important to note that the main global actors in the transformation of the digital twins frontier into high-tech equipment and services are not research centers, but companies acting simultaneously as qualified customers and beneficiaries of ongoing projects of a full innovation cycle. Having huge RD budgets and having a clear goal setting, it is these participants in the process that become the main drivers of the technological development of the healthcare sector associated with the introduction of digital twins. In this regard, the absence of the direction of Russian companies on the patent landscape cannot but cause concern, which creates risks of using innovative solutions created in the domestic sector of interdisciplinary research in the interests of foreign corporations identified as technology leaders in this review.Обоснование. Технологическое направление цифровые двойники (Digital Twins) входит в перечень главных стратегических технологических трендов 20192021 гг. В конце 2021 г. в Российской Федерации анонсирована инициатива, направленная на создание цифрового двойника в отечественной системе здравоохранения в рамках проекта по модернизации первичного звена. Цель исследования обзор возможных способов применения технологии цифровых двойников в глобальной системе здравоохранения и в ее российском сегменте, а также построение патентного и публикационного ландшафтов для идентификации технологических и академических лидеров направления. Методы. Наукометрический и патентный анализ. Результаты. Прослежены ключевые этапы развития тренда цифровые двойники в здравоохранении. Согласно данным выполненного наукометрического и патентного анализа по приоритетному направлению цифровые двойники в здравоохранении и медицине, Российская Федерация на конец 2021 г. занимает 35-е место в мире по удельному весу в общем числе статей в изданиях, индексируемых в WoS, и 20-е в общем числе патентных заявок на изобретение, т.е. не входит в число 10 лидирующих стран. Цитируемость отечественных публикаций в интернационализированном сегменте существенно ниже среднего (нормированного) показателя, что не дает основания говорить о достижении отечественными центрами компетенций исследовательского превосходства и даже мирового уровня. Заключение. В качестве ключевых событий развития тренда в Российской Федерации следует отметить создание консорциума Цифровое здравоохранение в 2018 г., Научного центра мирового уровня Цифровой биодизайн и персонализированное здравоохранение в 2020 г. и инициативу Минздрава России в 2021 г. Представляется важным отметить, что главными мировыми акторами трансформации направления цифровые двойники в высокотехнологичное оборудование и услуги являются не научно-исследовательские центры, а компании, выступающие одновременно в роли квалифицированных заказчиков и бенефициаров реализуемых проектов полного инновационного цикла. Располагая огромными бюджетами на НИОКР и имея четкое целеполагание, именно эти участники процесса становятся главными драйверами технологического развития сектора здравоохранения, связанного с внедрением цифровых двойников. В связи с этим не может не вызывать обеспокоенность низкая активность российских компаний в закреплении полученных результатов патентами, что создает риски использования инновационных решений, созданных в отечественном секторе междисциплинарных исследований, в интересах зарубежных корпораций, идентифицированных в настоящем обзоре в качестве технологических лидеров
NATURAL COURSE OF BRONCHIAL ASTHMA: FACTORS THAT DON’T ALLOW TO ACHIEVE THE CONTROL IN A LONG-TERM PERSPECTIVE
No full textВитамин D — новый вектор профилактики онкологических заболеваний?
No full textCurrently, a great number of research projects are focused on finding new treatment methods for cancer and carcinogenesis predictors, as well as the ways to dicrease cancer development risks. This article provides an overview of research on vitamin D as cancer prevention factor. The results of independent experiments and in vitro tests explaining the mechanisms of protective effect of vitamin D and its derivatives on cancer are illustrated. The review of epidemiological survey results obtained from different countries and various populations that were focused on the association of vitamin D use with various cancer pathologies incidence was performed.В настоящее время большое число исследований посвящено поиску новых методов лечения онкологических болезней, а также предикторов канцерогенеза и способов коррекции риска развития рака. В статье представлен обзор публикаций, посвященных исследованию витамина D как средства профилактики онкологических болезней, описаны результаты отдельных экспериментов и исследований in vitro, объясняющие механизмы протективного эффекта витамина D и его производных в отношении рака. Обобщены результаты эпидемиологических исследований, выполненных в разных странах и в различных популяциях, посвященных ассоциации применения витамина D с частотой встречаемости различных видов онкологической патологии
Analysis of Czech and international non-governmental non-profit organizations
No full textThe goal of this thesis was to compare Czech and Spanish non-governmental non-profit organizations and analyze common and diverse characteristics using international comparison in several areas. As a representative of the Czech non-profit sector was chosen ADRA, o.s. Spanish nonprofit sector was represented by the organization Manos Unidas. Findings revealed differences in investigated areas. However, founded differences were not so significant to identify one of the non-governmental non-profit organizations as a significantly better one. Nevertheless the author recommended transferring some of the best practices of Manos Unidas to ADRA, o.s
Benchmarking Performance of Offshore Construction Projects
No full textSince the rise of oil prices in 2007, the difference in gas prices between the US and Europe has increased steadily. The pressure to efficiently produce and maintain gas assets has thus also increased. On top of these external trends, ONEgas strives to be in the top quartile companies in the gas market. The integrated contractor of ONEgas, AJS, is stimulated to continuously improve their performance. Currently projects are evaluated separately on changing aspects. A comparison of projects based on their performance assessment is thus not reliable. This research proposes a benchmark tool for AJS to compare and signal performance. The corresponding analysis provides arguments in discussions around the performance of AJS. It was found that performance can be monitored by using the Project Management Triangle and controlled by acting on the comparison of the different projects with regard to the size of a project. The Project Management Triangle consists of Cost, Schedule, Scope and Quality as universal performance indicators. It is used to ensure comparability among projects in the Benchmark. The provided method for the selection of appropriate data can be used for the creation of a benchmark of other (unrelated) projects. The AJS benchmark is created in such a way that time, effort and required knowledge are reduced to a minimum. The required data is however only available after the project has completely been finished. It is therefore advised to incorporate the benchmark as one of the very last actions in the close out process. When monitoring and acting on the measured and compared performance it is important to keep the seven paradoxes in mind. When these are disregarded the action may very well have the opposite effect. It is thus advised to only use the benchmark as a signaling tool and have a separate study on how to improve a specific situation.SEPAMPOLGTechnology, Policy and Managemen
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