271 research outputs found

    AN EFFECTIVE METAHEURISTIC FOR TOURIST TRIP PLANNING IN PUBLIC TRANSPORT NETWORKS

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    The Time-Dependent Orienteering Problem with Time Windows (TDOPTW) is a combinatorial optimization problem defined on graphs. Its real life applications are particularly associated with tourist trip planning in trans-port networks, where travel time between two points depends on the moment of travel start. In the paper an effective TDOPTW solution (evolutionary algorithm with local search operators) was presented and applied to gen-erate attractive tours in real public transport networks of Białystok and Athens. The method achieved very high-quality solutions in a short execution time

    Automatyzacja w procesie detekcji obiekt├│w archeologicznych z danych ALS

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    In this paper approaches of historical, archaeological object detection from airborne laser scanning (hereinafter referred to as ASL) data were shown. Presented approach of automatic extraction of potential charcoal pile was the analysis of a selected processing of digital terrain model. In this example, it was attempted to detect archaeological sites on a small test area by usage of template matching. Positive results have proved a great number of detected objects. Methodology applied in the research allowed for finding of a large percentage of measured objects indirectly. Presented approach was also assessed by the results of object extraction in respect to field measurements in the area of interest, as well as effectiveness of automation procedure

    Resilience in conteporary psychology

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    Achieving Reliability Through Distributed Data Flows and Recursive Delegation

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    Strong reliability properties, such as state machine replication or virtual synchrony, are hard to implement in a scalable manner. They are typically expressed in terms of global membership views. As we argue, global membership is non-scalable. We propose a way of modeling protocols that does not rely on global membership. Our approach is based on the concept of a distributed data flow, a set of messages distributed in space and time. We model protocols as networks of such flows, constructed through recursive delegation. The resulting system uses multiple small membership services instead of a single global one while still supporting stronger properties. Our work was inspired by the functional approach to modeling distributed systems pioneered by I/O automata. This paper focuses on the basic model. Internal details of our system architecture and a compiler that translates protocols from our data flow language to real executable code will be discussed elsewhere.This work was supported in part by grants from AFOSR, AFRL, NSF, and Intel Corporatio

    Cherenkov Telescope Array : the WorldÔÇÖs largest VHE gamma-ray observatory

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    Very-High Energy (VHE) gamma-ray astroparticle physics is a relatively young field, and observations over the past decade have surprisingly revealed almost two hundred VHE emitters which appear to act as cosmic particle accelerators. These sources are an important component of the Universe, influencing the evolution of stars and galaxies. At the same time, they also act as a probe of physics in the most extreme environments known - such as in supernova explosions, and around or after the merging of black holes and neutron stars. However, the existing experiments have provided exciting glimpses, but often falling short of supplying the full answer. A deeper understanding of the TeV sky requires a significant improvement in sensitivity at TeV energies, a wider energy coverage from tens of GeV to hundreds of TeV and a much better angular and energy resolution with respect to the currently running facilities. The next generation gamma-ray observatory, the Cherenkov Telescope Array Observatory (CTAO), is the answer to this need. In this talk I will present this upcoming observatory from its design to the construction, and its potential science exploitation. CTAO will allow the entire astronomical community to explore a new discovery space that will likely lead to paradigm changing breakthroughs. In particular, CTA has an unprecedented sensitivity to short (sub-minute) timescale phenomena, placing it as a key instrument in the future of multi-messenger and multi-wavelength time domain astronomy. I will conclude the talk presenting the first scientific results obtained by the LST-1, the prototype of one CTA telescope type - the Large Sized Telescope, that is currently under commission

    Speed models and criteria for assessing traffic performance on two-lane highways

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    In the widely used HCM and HBS assessment methods of the traffic performance of two-lane highways speed models are an essential element of the analytical methodology. Differences in the approach to analyses, as well as differing numbers of determinants taken into account and criteria used to assess traffic performance may all produce disparate results and reduce the practicality of the application of these methods. The paper compares the HCM and HBS speed models and demonstrates key differences in their approach to the impact of traffic volume, the share of heavy vehicles and longitudinal gradients of the road. The assessment of traffic performance by both methods also demonstrates significant differences in assessments, especially in more adverse road and traffic conditions. The paper will also show assumptions underlying the choice of research sites, methods of traffic research, databases and selected results of analyses as well as the impact of selected factors on speed and speed regression models

    Critical limb ischemia caused by adductor canal compression syndrome ÔÇö case report with the review of the literature

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    We report a case of a 55-year-old male who was diagnosed with the adductor canal compression syndromeÔÇô a rarely described nontraumatic disorder of the lower limb resulting from the external compression of thesuperficial femoral artery in the adductor canal, that may present with the symptoms ranging from intermittentexercise-induced claudication up to arterial obstruction and critical limb ischemia

    Consideration of Critical Parameters for Improving the Efficiency of Concrete Structures Reinforced with FRP

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    Funding Information: This research was supported by the Polish National Agency for Academic Exchange no.: PPN/IWA/2019/1/00155/U/00001 (Iwanowska programme). Publisher Copyright: ┬ę 2022 by the authors. Licensee MDPI, Basel, Switzerland.Fibre-reinforced polymer materials (FRP) are increasingly used to reinforce structural elements. Due to this, it is possible to increase the load-bearing capacity of polymer, wooden, concrete, and metal structures. In this article, the authors collected all the crucial aspects that influence the behaviour of concrete elements reinforced with FRP. The main types of FRP, their characterization, and their impact on the load-carrying capacity of a composite structure are discussed. The most significant aspects, such as type, number of FRP layers including fibre orientation, type of matrix, reinforcement of concrete columns, preparation of a concrete surface, fire-resistance aspects, recommended conditions for the lamination process, FRP laying methods, and design aspects were considered. Attention and special emphasis were focused on the description of the current research results related to various types of concrete reinforced with FRP composites. To understand which aspects should be taken into account when designing concrete reinforcement with composite materials, the main guidelines are presented in tabular form.publishersversionpublishe

    The influence of rehabilitation (kinesiotherapy) on the quality of life of cancer patients provided with palliative care

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    Rehabilitation provision for the palliative patient is of great importance to the process of symptom treatment. It minimizes the complications and effects of the disease and optimizes, at least in the short term, the patients’ level of physical condition and both psychological and social functions. The aim of this study was to evaluate the influence of rehabilitation on patients’ quality of life in the terminal phases of cancer. The study involved 15 patients with advanced cancer and limited physical conditions. The Edmonton Functional Assessment Tool (EFAT) was used to measure the quality of life and control the symptoms. During the 28-day study significant improvement was observed in over 50% of the patients in the following: balance, mobility, activities of daily living and motivation, which are inseparable elements of improving the quality of life.Rehabilitation provision for the palliative patient is of great importance to the process of symptom treatment. It minimizes the complications and effects of the disease and optimizes, at least in the short term, the patients’ level of physical condition and both psychological and social functions. The aim of this study was to evaluate the influence of rehabilitation on patients’ quality of life in the terminal phases of cancer. The study involved 15 patients with advanced cancer and limited physical conditions. The Edmonton Functional Assessment Tool (EFAT) was used to measure the quality of life and control the symptoms. During the 28-day study significant improvement was observed in over 50% of the patients in the following: balance, mobility, activities of daily living and motivation, which are inseparable elements of improving the quality of life
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