bluuebunny/crossref_metadata_2025 huggingface dataset:
Fonctions spatio‑temporelles d’une généalogie homérique (Iliade, XX, 213‑241)
Authors: Lucci Carlamaria
Published: December 2019

Bien qu’arrivés jusqu’à nous sous une forme écrite, les deux poèmes épiques en grec ancien que l’on qualifie couramment d’homériques (Iliade et Odyssée) montrent une diction formulaire qui en assure le statut traditionnel. De là la légitimité de soumettre les récits généalogiques dont ils sont sillonnés à des analyses comparables à celles que les historiens et les ethnologues mènent sur les sources orales des sociétés traditionnelles, dans le but d’en reconstruire l’histoire et les démarches d’élaboration du passé. Dans cette contribution, est isolée la généalogie des souverains de Troie/Ilion, la ville qui a donné son nom à l’Iliade (XX, 213‑243), avec deux objectifs : montrer le rapport avec les stratifications de murailles qui ont caractérisé le site archéologique d’Hissarlik, dans la Turquie actuelle, entre l’âge du bronze (iiie millénaire av. J.‑C.) et les siècles obscurs (xiie‑ixe siècle av. J.‑C.) ; montrer le remodelage auquel le récit généalogique a été exposé pendant les siècles de réception de l’épopée correspondant à l’essor des cités grecques (viiie-vie siècle av. J.‑C.).
Formes et fonctions de la généalogie dans les traditions orale et écrite du Foûta‑Djalon
Authors: Diallo Amadou Oury
Published: December 2019

Cet article étudie la généalogie au Foûta‑Djalon (Guinée‑Conakry), dans ses formes et ses fonctions. Selon la nature du récit, la généalogie varie d’abord entre l’oral et l’écrit, la prose et la poésie ; ensuite selon qu’elle est intégrée ou non dans un genre, elle peut être autonome ou dépendante. Elle apparaît au cœur de l’épopée comme l’assise fondatrice du mythe des héros tandis que dans la poésie religieuse, elle sert à authentifier le discours. Par ailleurs, en tant que genre autonome, la généalogie épique fonctionne comme un hymne qui exalte la mémoire et les gestes des ancêtres. Enfin, le récit généalogique est, sous toutes ses formes, une exaltation de la mémoire ancestrale célébrée et fixée à travers des figures fondamentales et positives.
Fourth Generation of Rights and Their Reflections on Human Resources Practices in Tourism Businesses
Authors: Dinçer Füsun Istanbullu , Bayram Gul Erkol , Altunoz Ozlem
Published: December 2019

Sustainable development, which has been emphasized in the tourism system where sustainability has been targeted for years, temporarily eliminated the problems such as poverty, unemployment, and hunger for that period; however, it has affected tourism development by ignoring the rights of the ecosystem, future generations, and cities, thus causing some problems today. For these reasons, the need for handling with the manpower in tourism with a perspective that is more conscious, sensitive, and predictive than the current perspective has emerged. Taking these as a starting point, the study will include the following topics: the fourth generation of human rights, the current status, problems and opportunities of human resources in the tourism industry, and the reflection of the fourth generation of human rights on human resources.
Understanding the Nature of Deviant Workplace Behaviors
Authors: Yeşiltaş Murat , Gürlek Mert
Published: December 2019

Today, deviant organizational behaviors increase gradually and cost organizations billions of dollars. Not only the manufacturing industries but also the tourism industry is characterized by deviant workplace behaviors. Deviant behaviors are widely observed in tourism enterprises. Deviant behaviors are displayed almost every day in tourism enterprises. Many enterprises face the destructive consequences of deviant behaviors. Therefore, deviant behaviors in the scope of tourism enterprises are worth examination. The current study aims at discovering the nature of deviant workplace behaviors in the tourism industry. For this purpose, the term “deviance” and organizational deviant behaviors were defined. Later the nature of the deviant behaviors in tourism industry was discussed, and lastly, antecedents and consequences of deviant behaviors were put forward.
Macroscopic Group Robots Inspired By “Brownian Motion”
Authors: Itami Teturo
Published: December 2019

The sections contained in this chapter, Macroscopic Group robots inspired by “Brownian motion”, examine the basic concepts and the methods to develop systems of new type of group robots. We take robots especially with neither external sensors nor apparatuses for mutual communication. In microscopic physics we have a phenomena of Brownian motion. We note that in Brownian motion pollen particles can be motivated by collision with surrounding molecules although each molecule has neither sensor nor mutual communication. By setting temperature gradient surrounding the pollen particle, controlling its motion is possible. So when we note correspondence between molecules and robots, we will obtain a transportation system of macroscopic objects that correspond to pollen particles in Brownian motion. We use a potential force signal that corresponds to temperature in Brownian motion. To perform the tasks, we show and solve various challenging problems in fundamental formulae, simulation scheme, and control method in these areas.
Integrating Linear Physical Programming and Fuzzy Logic for Robot Selection
Authors: Ilgın Mehmet Ali
Published: December 2019

An increasing number of companies are using robots to perform a variety of repetitive and hazourdous tasks. Existence of many different robot alternatives force companies to consider several conflicting criteria before determining the most suitable robot alternative. Researchers have developed various multi-criteria decision making based methodologies in order to assist the decision makers in robot selection process. However, those methodologies require decision makers to assign physically meaningless weights to evaluation criteria. This article eliminates this weight assignment process by proposing a robot selection methodology based on linear physical programming. In addition, fuzzy logic was integrated into the proposed approach in order to determine the preference values of subjective robot evaluation criteria. A numerical example is also provided in order to present the applicability of the proposed methodology.
Fuzzy Logic Based Path Planning for Industrial Robot
Authors: Sahu Supriya , Choudhury Bibhuti Bhusan
Published: December 2019

This article describes how industrial robots are generally used to perform different tasks in industries, such as pick and place, and many more operations in industries. Among these, pick and place is a very common and frequently used task. Path planning is the most important thing in order to make any process more economical. The main focus of the research is to design a fuzzy control system for path planning for industrial robots using artificial intelligence using fuzzy logic. For the analysis, ten different tasks are tested. For fuzzy logic systems, three membership functions are analyzed and compared to find the best result. From the research, it has been found that a Gaussian membership function gives more accurate result in comparison to the other two membership functions.
Knowledge Processing Using EKRL for Robotic Applications
Authors: Adjali Omar , Ramdane-Cherif Amar
Published: December 2019

This article describes a semantic framework that demonstrates an approach for modeling and reasoning based on environment knowledge representation language (EKRL) to enhance interaction between robots and their environment. Unlike EKRL, standard Binary approaches like OWL language fails to represent knowledge in an expressive way. The authors show in this work how to: model environment and interaction in an expressive way with first-order and second-order EKRL data-structures, and reason for decision-making thanks to inference capabilities based on a complex unification algorithm. This is with the understanding that robot environments are inherently subject to noise and partial observability, the authors extended EKRL framework with probabilistic reasoning based on Markov logic networks to manage uncertainty.
Distributed Algorithms for Swarm Robots
Authors: Chaudhuri Sruti Gan , Mukhopadhyaya Krishnendu
Published: December 2019

A swarm of robots is a collection of tiny identical autonomous robots. The robots perform a given task, e.g., cleaning a big surface, moving a big object, guarding an area etc., in a collaborative framework. The goal of research in swarm robotics is to develop a low cost multi-robot system which will be at least as efficient as one big expensive unit. The field of swarm robotics has been addressed from various aspects such as artificial intelligence, mechanical and electrical engineering, motion control, robots' path planning etc. From theoretical point of view, designing deterministic algorithms for these robots to execute a particular job is an emerging and useful field of research. As the robots work individually but in collaboration, distributed algorithms are more appropriate than centralized ones. This chapter discusses the distributed framework for swarm robots and presents some reported research results as well as a few open problems.
Efficient Data Reporting in a Multi-Object Tracking Using WSNs
Authors: Elfouly Fatma H. , Ramadan Rabie A. , Mahmoud Mohamed I. , Dessouky Moawad I.
Published: December 2019

Object tracking is one of the most important applications in wireless sensor networks (WSNs). Many recent articles have been dedicated to localization of objects; however, few of these articles were concentrated on the reliability of network data reporting along with objects localization. In this work, the authors propose an efficient data reporting method for object tracking in WSNs. This paper aims to achieve both minimum energy consumption in reporting operation and balanced energy consumption among sensor nodes for WSN lifetime extension. Furthermore, data reliability is considered in the authors' model where the sensed data can reach the sink node in a more reliable way. This work first formulates the problem as 0/1 Integer Linear Programming (ILP) problem, and then proposes a SWARM intelligence for solving the optimization problem. Through simulation, the performance of proposed method to report information about the detected objects to the sink is compared with the previous works related to the authors' topic, such as LR-based object tracking algorithm, SEB, EPWSN, and ACO.
Design and Control of a Hand-Assist Robot with Multiple Degrees of Freedom for Rehabilitation Therapy
Authors: Kawasaki Haruhisa , Ueki Satoshi , Ito Satoshi , Mouri Tetsuya
Published: December 2019

This chapter focuses on a patient self-controlled rehabilitation system using our developed exoskeleton-type hand-motion-assist robot and tele-rehabilitation. The virtual reality-enhanced new hand rehabilitation support system, which we have developed for stroke patients in the acute stage, is aiming to allow such patients to conduct every day exercises by themselves without supervisors. This system features a multi-DOF motion assistance device, a virtual reality interface for patients, and a symmetrical master-slave motion assistance training strategy called ”self-motion control”, in which the stroke patients' healthy hand on the master side creates the assistance motion for the impaired hand on the slave side. Moreover, a tele-rehabilitation system consisting of a hand rehabilitation support system for the patients, an anthropomorphic robot hand for the therapist, and a remote monitoring system for diagnosing the degree of recovery is explained.
Ontology-Based Interaction of Mobile Robots for Coalition Creation
Authors: Kashevnik Alexey , Smirnov Alexander , Teslya Nikolay
Published: December 2019

Popularity of research in the area of robotics over the last years opens new tasks to develop in the area of intelligent behavior of robots for coalition creation and joint tasks solving by them. The article presents an approach to ontology-based mobile robots interaction for coalition creation. The approach is based on cyber-physical-social system concept where the physical devices interact in smart space with each other and with humans for implementing joint actions in physical space. In scope of the approach the context-based model for mobile robot interaction, the ontological model of a mobile robot, and the method for robot ontology matching have been developed. The ontology formally represents knowledge as a set of concepts within a domain, using a shared vocabulary to denote the types, properties, and interrelationships of those concepts. The presented approach has been approved by the point exploring and obstacles overcoming case study. Mobile robots have been constructed based on the Lego Mindstorms EV3 educational kit.
Development of Bluetooth, Xbee, and Wi-Fi-Based Wireless Control Systems for Controlling Electric-Powered Robotic Vehicle Wheelchair Prototype
Authors: Champaty Biswajeet , Nayak Suraj Kumar , Thakur Goutam , Mohapatra Biswajit , Tibarewala D. N. , Pal Kunal
Published: December 2019

In this study, multiple control systems were developed using commonly used wireless communication protocols like Bluetooth, Xbee, and Wi-Fi. Mechanical switch based control systems were initially designed using Xbee and Bluetooth protocols. Further, Android application based control systems were developed using Bluetooth and Wi-Fi protocols. A robotic vehicle was used as an electric-powered wheelchair prototype. Ultrasonic sensors and infrared sensors were integrated with the robotic vehicle for obstacle and pothole detection, respectively. The control systems were tested in an L-shaped corridor for identifying the suitable wireless communication protocol to efficiently guide the robotic vehicle through a scheduled navigational pathway. Both Xbee and Wi-Fi technology based control systems were able to guide the robotic vehicle through the corridor. But the implementation of Xbee communication protocol is economic. However, for shorter distances, Bluetooth technology may be used for cost-effective implementation.
Aerial Robot Formation Control via Pigeon-Inspired Optimization
Authors: Duan Haibin
Published: December 2019

Formation flight for aerial robots is a rather complicated global optimum problem. Three formation flight control problems are introduced in this chapter, respectively, underlying controller parameter optimization, basic formation control and formation reconfiguration control. Two methods, Model Prediction Control (MPC) and Control Parameterization and Time Discretization (CPTD), are applied to solve the above problems. However, the selection of appropriate control parameters is still a barrier. Pigeon-Inspired Optimization (PIO) is a new swarm intelligence optimization algorithm, which is inspired by the behavior of homing pigeons. Owning to its better performance of global exploration than others, the thoughts of PIO are applied to the control field to optimize the control parameters in the three aerial robot formation problems, to minimize the value of the cost function. Furthermore, comparative experimental results with a popular population-based algorithm called Particle Swarm Optimization (PSO) are given to show the feasibility, validity and superiority of PIO.
Agent-Development Framework Based on Modular Structure to Research Disaster-Relief Activities
Authors: Takami Shunki , Takayanagi Kazuo , Jaishy Shivashish , Ito Nobuhiro , Iwata Kazunori
Published: December 2019

This article describes approaches to the RoboCup Rescue Simulation league which is a part of the response to recent large-scale natural disasters. In particular, the project provides a platform for studying disaster-relief agents and simulations. The aim of the project is to contribute to society is by making widely available the findings our research into disaster relief. Some disaster-relief agents contain excellent algorithm modules, which should ideally be shareable among developers. However, this is hindered when the program structure of the agents are different among different teams. Therefore, this article designs and implements a modular agent-development framework that unifies the structure within RoboCup Rescue Simulation agents to facilitate such technical exchange.
Modelling and Simulation Platform for Chemical Plume Tracking and Source Localization
Authors: Lu Tien-Fu , Awadalla Mohamed
Published: December 2019

Using autonomous robot to detect chemical emissions and track plumes caused by fire, toxic gas leakage and explosive at their early stages, and swiftly localize their sources can avoid risking human health and potentially save lives. The benefits of deploying autonomous robot(s) rather than human beings in performing such hazardous tasks are obvious. Even though using real robots to research, develop, and experiment in real environment are normally preferred, modelling and simulation are indeed sometimes better options when such as a consistent and repeatable complex environment with controllable variables (i.e. wind velocity and plume propagation in this case) for experiments is important. This chapter presents one out of many possible modelling and simulation approaches for the research related to chemical plume tracking and source localization using robots, and covers the modelling of robot, the modelling of the environment, and the integration of both to become a platform.
Development and Application of Art Based STEAM Education Program Using Educational Robot
Authors: Kim Jin-Ok , Kim Jinsoo
Published: December 2019

This article aims at developing an art-based STEAM educational program that would help elementary school students to develop their abilities to solve scientific problems and artistic sensibilities by using an educational robot. In addition, this article investigates whether the program could be applied in the field. In order to achieve the purpose of this article, ‘mobile' and ‘abstraction' were selected as the subjects of the activities and the STEAM educational program which allowed students to learn knowledge regarding science, technology and mathematics in a comprehensive manner through the course in order to experience and create works of art. Also, the level of satisfaction and effectiveness were confirmed by applying the program to the class targeting students in the 4th and 6th grades.
Delivering Value in Procurement With Robotic Cognitive Automation (RCA) Services
Authors: Teli Ruchira , Prasad Suneel Kumar
Published: December 2019

Organizations are applying digitalization to increasing amounts of different organizational processes. The procurement sector is also changing and actively seeking better ways to enhance performance such as the automation of workflow processes, for example, robotic process automation (RPA). To meet this clear demand, the automation of workflow processes in organizations has been a rising trend during the past few years. The author analyzes the potential of RPA along with the cognitive technologies robotic cognitive automation-based (RCA) value creation through knowledge work digitalization in the procurement sector.
Advances in Cybernetics Provide a Foundation for the Future
Authors: Umpleby Stuart , Wu Xiao-hui , Hughes Elise
Published: December 2019

Interest in cybernetics declined in North America from the mid 1970s to 2010, as measured by the number of journal articles by North American authors, but increased in Europe and Asia. Since 2010 the number of books on cybernetics in English has increased significantly. Whereas the social science disciplines create descriptions based on either ideas, groups, events or variables, cybernetics provides a multi-disciplinary theory of social change that uses all four types of descriptions. Cyberneticians use models with three structures – regulation, self-organization and reflexivity. These models can be used to describe any systemic problem. Furthermore, cybernetics adds a third approach to philosophy of science. In addition to a normative or a sociological approach to knowledge, cybernetics adds a biological approach. One implication of the biological approach is additional emphasis on ethics.
Permissioned Blockchain Model for End-to-End Trackability in Supply Chain Management
Authors: Khanna Tejaswi , Nand Parma , Bali Vikram
Published: December 2019

Supply chain management or logistics is a crucial aspect of any business, be it agriculture, food, healthcare, and more. However, it also involves a communication among a host of actors performing different roles in the chain. Integration of these actors in a transparent yet secure way is needed, which blockchain technology has the potential to do so. In this article, different models of blockchain application in logistics are discussed and how the permissioned blockchains can be used in realizing the business case. An overview of different frameworks which enable permissioned blockchains are discussed in this article. Based on this, the authors propose an asset transfer model which can be employed to enhance supply chain trackability using permissioned blockchain.
Wear Characteristics of Ni-WC Powder Deposited by Using a Microwave Route on Mild Steel
Authors: Vasudev Hitesh
Published: December 2019

In the present research work, Ni-WC powder was deposited on mild steel using a microwave applicator. Deposited clad has a thickness of 0.5 mm and deposition time taken for coating was 15 minutes for each sample size. The developed layer on the substrate was analysed through several testing techniques include mechanical characterization by the Vickers hardness test and a wear test on the Pin-on disc apparatus according to ASTM-G99 standard. Furthermore, micro structural characterization was done by using scanning electron microscopy technique and it has shown proper bonding between powder and substrate. Coating showed excellent results in terms of hardness and wear resistance as compared to base material mils steel. The pullout, scoring and abrasion were the responsible wear mechanisms in the substrate and clad.
The Composition and Properties of Autoclaved Gas Concrete with Amorphized Raw Modifiers
Authors: Nelubova Victoria V.
Published: December 2019

The article presents the research devoted to the effect of mineral modifiers obtained by mechanical activation of amorphized raw materials in water environment with obtaining a stable suspension on the gas concrete properties of autoclaved hardening. It was shown that the introduction of a mineral additive provides the intensification of the processes of porization of the gas concrete mixture, which ensures the formation of a heteropore structure of the finished composite. It was justified that the mineral modifier from amorphized rocks, regardless of the composition in the pre-autoclave period, acts as a structure-forming component causing the reduction of porous processes with the formation of a system with an improved micro-and macrostructure. The structural features of cellular products of autoclaved hardening, reasoned by the presence of a mineral modifier from amorphized rocks, were shown. With the introduction of the active additive, the increase in the pore size occurs during the process of condensation of the interpore partition. It provides the increase in the strength of products with the improvement of their heat-insulating characteristics.
To the Problem of Assessing the Level of Self- Stresses during the Formation of the Structure of Self-Compacting Concrete
Authors: Nesvetaev G.V. , Koryanova Y.I. , Zhilnikova T.N. , Kolleganov A.V.
Published: December 2019

Conditional quantitative criteria characterizing the shrinkage crack resistance of various concretes and a model describing the change in the proposed criteria depending on the magnitude of shrinkage deformation, creep coefficient, tensile strength kinetics and shrinkage strain kinetics for ordinary concrete and self-compacting concrete are proposed. The proposed criteria for the class C40/50 concrete have been calculated and it was shown that self-compacting concrete can potentially have higher crack resistance during shrinkage. To ensure high cracking resistance during shrinkage when choosing superplasticizers and mineral additives, attention should be paid to their effect on shrinkage, creep and E-modulus of the cement stone. It should exclude additives that increase the shrinkage and E-modulus and reduce creep of cement stone.
Fiber Concrete for 3-D Additive Technologies
Authors: Klyuev Sergey V. , Shevchenko Andrey V. , Shorstova E.S.
Published: December 2019

Fine-grained fiber concrete used in 3D printing is significantly different from conventional heavy concrete, which is determined by the increased consumption of cement, low water-cement ratio and the absence of large aggregates. The largest grain size of fine aggregate is selected taking into account the thickness of the section, the frequency and type of reinforcement, as well as the method of concrete placement. Despite the fact that the tensile strength of concrete on fine sand is more than 1.5 times higher than the strength of concrete on coarse sand, while there is a decrease in compressive strength. Due to the peculiarities of the technology of concrete manufacturing for layering, the use of coarse sands is impractical, and therefore it was decided to use quartz sand with a particle size module of 1.12 as a filler.
The Technogenic Raw Materials Surface Characteristics Role when Obtaining the Autoclave Hardening Binders of
Authors: Fomin Alexander E. , Lesovik Ruslan V. , Glagolev E.S. , Biryukov Sergey V.
Published: December 2019

The paper investigates the surface wet magnetic separation (WMS) technogenic raw materials concentration tailings particles properties. The mechanical activation effect nature on the binder structural and phase characteristics is revealed. High pozzolan activity of WMC tails, which consists in genetic and morphological features of the surface of poly-mineral structures has been established. During mechanical activation of lime together with WMS tailings, an increase in the number of neoplasms occurs in the amorphous phase form with a low degree of polymerization, which is confirmed by the acid-soluble SiO2presence, as well as by X-ray phase analysis. The work results indicate a WMC waste particles surface high energy potential for its use in building materials for autoclaved hardening. This study will contribute to the energy and resource-saving technologies development, the solution of environmental problems in order to create a comfortable environment for life and work.
Effect of Dosage of Redispersible Powders on the Properties of Fine Concrete
Authors: Nesvetaev G.V. , Dolgova A.V. , Postoj L.V. , Grigoryan M.N. , Yazyev B.M.
Published: December 2019

The RPP introduction has been established up to 3% by weight of the dry concrete mix is ​​accompanied by a decrease in the fine-grained concrete tensile strength in compression to 40% and in tension during bending to 15%. The relationship between the tensile strength limit in bending and compression for the studied materials is invariant to the cement and RPP type. With the concrete tensile strength in tensile bending increase, there is a weak tendency to a decrease in the adhesion ratio value to the concrete base and tensile strength. The adhesion amount to the concrete base with RPP increasing dosage can either increase or decrease after a certain limit, depending on the cement properties. The maximum increase in adhesion to the concrete base was 37%, while the decrease in the concrete elasticity initial modulus was 26%.
Interconnection of Intrinsic Deformations and Adhesive Phenomena in Modified Disperse Systems
Authors: Onoprienko N.N. , Salnikova O.N.
Published: December 2019

The studies’ results of the adhesive and the cement-polymer compositions shrinkage phenomena are given. Theoretical approaches are justified when selecting additives to reduce the cement-polymer systems shrinkage deformations. A method for measuring water separation and shrinkage with the DBS device (the soil bucking measuring device), which simulates the modified disperse systems intrinsic deformations processes and of the products based on them, is proposed. The adhesion strength results of at the “stone material-solution” boundary are given. It has been shown that the solutions shrinkage has a significant effect on the adhesive strength.
Improving the Methodology for Calculating the Bearing Capacity of Eccentrically Compressed Reinforced Concrete Elements Based on the Use of the Refined Curvilinear Deformation Diagrams of Concrete and Reinforcement
Authors: Nikulin Alexander I. , Qasim Al-Khawaf Ali Fadhil
Published: December 2019

The article proposes a new approach to improving the methodology for calculating the bearing capacity of the eccentrically compressed reinforced concrete elements for cases of their loading with large eccentricities. The basis of this technique is considered as a modified version of the deformation model for the reinforced concrete resistance force. The main feature of this model is the energy approach to transforming the reference diagrams of compression and concrete tension into the diagrams of non-uniform deformation, corresponding to the stress-strain state of the compressed and stretched zones of concrete in the cross section of the eccentrically compressed reinforced concrete structures. This way there is no falling branch in the concrete diagrams obtained by this method. A calculation diagram of the steel reinforcement deformation with a physical yield point was taken as a partial function, consisting of one linear and two non-linear equations. The proposed method also shows the possibility of taking into account the greatest curvature of an eccentrically compressed reinforced concrete element in the plane of its loading. The article presents all the necessary dependencies allowing the theoretical value of the carrying capacity of an eccentrically compressed reinforced concrete element determination. The results of the numerical studies performed using the design software developed by the authors for the personal computer are given.
Analysis of Prestressed Bent Precast-Cast-In-Situ Structures in Vlasov-Mileykovsky Method with Physical Non-Linearity of Material
Authors: Poloz Maxim A. , Frolov Nikolay V. , Shevchenko Andrey V. , Jimei Jan
Published: December 2019

Precast reinforced concrete structures with and without reinforcement pre-stressing are used both as newly designed independent ones and are the result of work to strengthen the existing structures by increasing the section. In both cases, the cross section of such elements is considered as a two-layer section, and the resulting composite element works under load under conditions distributed between the layers of internal forces, the mechanism and actual distribution of which depends on the physical and mechanical characteristics, the design scheme and the layers contact interaction parameters. When calculating and designing prestressed reinforced concrete precast-monolithic elements, the shear seam ductility is usually not paid much attention to, which complicates the structure actual stress-strain state analysis and contains a certain undiscovered potential of its rational design. One of the possible directions in solving the problem, which takes into account the contact seam shift, is the structural mechanics variation principles use in the calculation of structures such as rods of composite section. The questions of a composite reinforced concrete precast-monolithic rod of the variation principles of structural mechanics based on the method of V.Z. Vlasov - I.E. Mileykovsky in the displacements form in combination with the step-iterative method of calculation practical applicability in the structural analysis is considered in this work,. The numerical calculations results according to the proposed method are given. This allows to take into account the precast and monolithic layers shear connections specifics, to take practical account of weld compliance, and also to take into account the material characteristics’ physical non-linearity, which contributes to the precast monolithic structures rational design.
The Concrete Diagrams Integral Parameters in the Calculations of Reinforced Concrete Elements by Limiting States
Authors: Eryshev Valeriy A.
Published: December 2019

The paper proposes a method for calculating the reinforced concrete elements strength according to the deformation model using the deformation diagrams of concrete and reinforcing steel materials, which eliminates the complicated procedure of numerical integration of stresses in the element section during the transition to generalized internal forces. Integral parameters of diagrams are introduced into the energy model for calculating the strength of reinforced concrete elements along with the deformations and stresses normalized values at the base diagrams’ points. The integral parameters are calculated for the element cross section, the strain at the stress diagram gravity center in the compressed concrete zone and the coordinates of force in the concrete and reinforcement are relative to the neutral axis from the condition of the stress profile shape compliance in the element compressed zone, and the concrete diagram is used in the calculations. The integral parameters calculated dependences for the compressive strength concrete classes. The recommendations on the concrete diagrams integral parameters values rationing and their use in the complex sections and statically indeterminable systems calculations are given.
Об эффективной стратегии распараллеливания при решении задач о сумме подмножеств методом ветвей и границ
Authors: Kolpakov Roman Maksimovich , Posypkin Mikhail Anatol'evich
Published: December 2019

Рассматривается легко реализуемая на практике стратегия распараллеливания при решении задачи о сумме подмножеств методом ветвей и границ, называемая рекурсивной стратегией распараллеливания. Сравниваются два различных варианта этой стратегии: фронтальный и сбалансированный. На примере частного случая задачи о сумме подмножеств показано, что сбалансированный вариант является более эффективным, чем фронтальный вариант. Более того, показано, что для рассматриваемого частного случая задачи о сумме подмножеств сбалансированный вариант является оптимальным по времени.
Локальные предельные теоремы в обобщeнной схеме размещения частиц по упорядоченным ячейкам
Authors: Timashev Aleksandr Nikolaevich
Published: December 2019

Рассматривается обобщенная схема размещения $n$ частиц по упорядоченным ячейкам (компонентам). Сформулированы в качестве гипотез утверждения, дающие достаточные условия сходимости при $n\to\infty$ распределений чисел компонент заданного объема и общего числа компонент к отрицательному биномиальному распределению. Приводятся примеры, подтверждающие в частных случаях справедливость этих утверждений. При рассмотрении некоторых примеров доказываются локальные предельные теоремы, оценивающие распределение общего числа компонент и обобщающие в частных случаях известные результаты о сходимости этого распределения к нормальному закону.
Большие уклонения ветвящегося процесса в случайной среде. I
Authors: Shklyaev Alexander Viktorovich
Published: December 2019

Работа состоит из двух частей. В первой части работы найдены асимптотики вероятностей больших уклонений для последовательности, заданной случайным разностным уравнением $Y_{n+1}=A_{n} Y_n + B_n$, где $A_1,A_2,\ldots$ - независимые одинаково распределенные случайные величины, а $B_n$ может зависеть от $\{(A_k,B_k),0\leqslant k<n\}$ при любом $n\geqslant1$. Во второй части полученные результаты применяются к большим уклонениям ветвящихся процессов в случайной среде.
Variação por um ano da radiação fotossinteticamente ativa, ultravioleta-a e ultravioleta-b no bairro Trindade, Florianópolis, Santa Catarina
Authors: Pereira Débora Tomazi , Bouzon Zenilda Laurita , Simioni Carmen
Published: December 2019

O objetivo deste estudo foi medir a intensidade de PAR, RUVA e RUVB durante um ano em Florianópolis. As medições ocorreram todas as segundas, quartas e sextas-feira às 10:00, às 11:00, às 12:00, às 13:00 e às 14:00. As maiores intensidades de PAR foram observadas em janeiro, seguidas de fevereiro, novembro e dezembro. As maiores intensidades de RUVA ocorreram de setembro a fevereiro, e para RUVB, de novembro a fevereiro. Tendo em conta o horário, as intensidades de PAR não mostraram diferença estatística, as intensidades de RUVA foram maiores que as de RUVB durante todos os meses e em todos os momentos. Para RUVA, os picos de intensidade ocorreram ao meio-dia, enquanto o RUVB foi mais constante durante as horas medidas. Sazonalmente, observou-se que os índices mais altos de PAR, UVAR e UVBR ocorreram no verão.
Fatores condicionantes da desigualdade salarial no Brasil: análise com dados em painel para o período de 2007 a 2016
Authors: Alencar Matheus Oliveira de , Araújo Jair Andrade de , Justo Wellington Ribeiro
Published: December 2019

Este estudo busca evidenciar os fatores condicionantes da desigualdade salarial nos municípios brasileiros nos anos de 2007 a 2016. Para alcançar esse objetivo, recorreu-se a variáveis municipais calculadas por meio dos microdados da RAIS/MTE. O método de análise empregado foi o de regressões com dados em painel. De maneira geral, as principais hipóteses do estudo foram confirmadas, já que se verificou, no Brasil, uma relação positiva entre desigualdade salarial e o tamanho do município, ou seja, constatou-se que municípios maiores, em termos populacionais, tendem a exibir maiores níveis de desigualdade. A mesma relação foi observada com o valor do salário médio do município. Em suma, foi possível observar que grande parte da desigualdade salarial é gerada pela existência dos diferenciais de salário entre setores de trabalho, classe de escolaridade e sexo do trabalhador.
ESTIMATING ABOVE GROUND BIOMASS OF PINUS ROXBHURGHII USING SLOPE BASED VEGETATION INDEX MODEL
Authors: Joshi A. M. , Shahnawaz S. , Ranjit B.
Published: December 2019

Abstract. Pinus roxburghii is one of the important and most widely planted tree species in Nepal. Despite its large abundance and high economic values, limited studies on its AGB have been conducted in Nepal, especially using in situ non-destructive method. There are different methods to study the AGB. Regression equation based on the correlation between VI and AGB is cost effective method, and replicable in another sites of similar environment by just acquiring satellite images. Numerous methods have been developed to calculate VIs and each calculated VI shows different relation with AGB in different environments for same species. Therefore, there is a need to identify a most appropriate VI that has the highest correlation with AGB of P. roxburghii. The current study was carried out in Hattiban and Dollu community forests of Kathmandu district, using ResourceSat-2 imagery. In this study, Slope based VIs were used. Regression analysis between slope based VIs and AGB showed that relation between all VIs and AGB were significant. However, NDVI had the highest relation with AGB compared to others. Therefore, it was concluded that NDVI was the most appropriate VI to estimate AGB of P. roxburghii, and the regression equation with NDVI was used to estimate the AGB of P. roxburghii in the study area.
SPATIO-TEMPORAL ANALYSIS AND MODELING OF URBAN GROWTH OF BIRATNAGAR CITY, NEPAL
Authors: Shrestha S.
Published: December 2019

Abstract. Increasing land use land cover changes, especially urban growth has put a negative impact on biodiversity and ecological process. As a consequences, they are creating a major impact on the global climate change. There is a recent concern on the necessity of exploring the cause of urban growth with its prediction in future and consequences caused by this for sustainable development. This can be achieved by using multitemporal remote sensing imagery analysis, spatial metrics, and modeling. In this study, spatio-temporal urban change analysis and modeling were performed for Biratnagar City and its surrounding area in Nepal. Land use land cover map of 2004, 2010, and 2016 were prepared using Landsat TM imagery using supervised classification based on support vector machine classifier. Urban change dynamics, in term of quantity, and pattern was measured and analyzed using selected spatial metrics and using Shannon’s entropy index. The result showed that there is increasing trend of urban sprawl and showed infill characteristics of urban expansion. Projected land use land cover map of 2020 was modeled using cellular automata-based approach. The predictive power of the model was validated using kappa statistics. Spatial distribution of urban expansion in projected land use land cover map showed that there is increasing threat of urban expansion on agricultural land.
A COMPARATIVE ASSESSMENT OF REMOTE SENSING IMAGING TECHNIQUES: OPTICAL, SAR AND LIDAR
Authors: Agrawal S. , Khairnar G. B.
Published: December 2019

Abstract. Remote sensing is a popular technique that is using in the mapping and monitoring of earth features. Early remote sensing was predominantly passive, i.e. it depends upon the sun for energy. Till the last decade, optical imaging is mainly used in remote sensing works. Over the time, significant innovations and improvements have been made in the active remote sensing which resulted in the form of sophisticated imaging techniques like Synthetic Aperture RADAR (SAR) and Light Detection And Ranging (LiDAR). These advancements promoted the use of multi-sensor and multi-source data in remote sensing projects. This highlights the need to review these imaging techniques. Therefore, this review work is carried out. In this review, different imaging techniques are discussed and compared. Optical, SAR and LiDAR techniques are first summarized and then they are compared on the basis of technical specification and working. Finally, an in-depth assessment is made on the applicability of these imaging techniques in different fields.
TEMPORAL SHIFT OF BAGMATI RIVER OVER 25 YEARS USING LANDSAT
Authors: Subedi A. , Poudel P. , Acharya T. D.
Published: December 2019

Abstract. Bagmati River has been a terrific boon in different aspects like natural, cultural, ecological, etc. However, the river has been in a critical situation with the shift in its quality and quantity during these years. Since the changes are slow-growing, actual shifts are barely noticed. While the in-situ analysis and experimentation become costly, the analysis of Landsat images acquired with the application of Remote Sensing (RS) and Geographic Information System (GIS) provides an inexpensive technique in estimating and mapping such temporal shift in the river. Concerning the case, this study modelled the temporal changes of the Bagmati River within 25 years (1991–2016) using the multi-temporal Landsat images. We adopted the Normalized Difference Water Index (NDWI for the unsupervised extraction of the water feature and monitoring the changes. A model was developed in Arc-GIS by discerning the river, and the difference was determined for 25 years. The result indicated a major temporal shift in the river channel with a decreasing trend from 1991 to 2016. Over 25 years, the river loss almost one-third of its original water-flow channel with a severe sweep in the south-western portion of the study area. With this precise information, a field-based study can be undertaken either to analyse the damage caused by the river in those particular portions or to assess the factors affecting the river shift. Hence, we strongly recommend employing the cost-effective methods, RS and GIS, for detecting, analysing and monitoring the shifts and changes in the rivers and lakes over a while.
THE CONTRIBUTION OF GEOMATIC TECHNOLOGIES TO BIM
Authors: Pavelka K. , Matoušková E. , Pavelka jr. K.
Published: December 2019

Abstract. There are many definitions of the commonly used abbreviation BIM, but one can say that each user or data supplier has different idea about it. There can be an economic view, or other aspects like surveying, material, engineering, maintenance, etc. The common definition says that Building Information Modelling or Building Information Management (BIM) is a digital model representing a physical and functional object with its characteristics. The model serves as a database of object information for its design, construction and operation over its life cycle, i.e. from the initial concept to the removal of the building. BIM is a collection of interconnected digital information in both protected and open formats, recording graphical and non-graphical data on model elements. There are two facets: a) BIM created simultaneously with the project, or project designed directly in BIM (it is typical of new objects designed in CAD systems - for example in the Revit software) or b) BIM for old or historical objects. The former is a modern technology, which is nowadays used worldwide. From the engineer’s perspective, the issue is the creation of BIM for older objects. In this case, it is crucial to obtain a precise 3D data set - complex 3D documentation of an object is needed and it is created using various surveying techniques. The most popular technique is laser scanning or digital automatic photogrammetry, from which a point cloud is derived. But this is not the main result. While classical geodesy gives selective localized information, the above-mentioned technologies give unselected information and provide huge datasets. Fully automatic technologies that would select important information from the point cloud are still under development. This seems to be a task for the coming years. Large amounts of data can be acquired automatically and quickly, but getting the expected information is another matter. These problems will be analysed in this paper. Data conversion to BIM, especially for older objects, will be shown on several case studies. The first is an older technical building complex transferred to BIM, the second one is a historical building, and the third one will be a historic medieval bridge (Charles Bridge in Prague). The last part of this paper will refer to aspects and benefits of using Virtual Reality in BIM.
Modeling volcanic ash aggregation processes and related impacts on the April/May 2010 eruptions of Eyjafjallajökull Volcano with WRF-Chem
Authors: Egan Sean D. , Stuefer Martin , Webley Peter W. , Lopez Taryn , Cahill Catherine F. , Hirtl Marcus
Published: December 2019

Abstract. Volcanic eruptions eject ash and gases into the atmosphere that can contribute to significant hazards to aviation, public and environment health, and the economy. Several volcanic ash transport and dispersion (VATD) models are in use to simulate volcanic ash transport operationally, but none include a treatment of volcanic ash aggregation processes. Volcanic ash aggregation can greatly reduce the atmospheric budget, dispersion and lifetime of ash particles and therefore its impacts. To enhance our understanding and modeling capabilities of the ash aggregation process, a volcanic ash aggregation scheme was integrated into the Weather Research Forecasting with online Chemistry (WRF-Chem) model. Aggregation rates and ash mass loss in this modified code are calculated in-line with the meteorological conditions, providing a fully coupled treatment of aggregation processes. The updated-model results were compared to field measurements of tephra fallout and in situ airborne measurements of ash particles from the April/May 2010 eruptions of Eyjafjallajökull Volcano, Iceland. WRF-Chem, coupled with the newly added aggregation code, modeled ash clouds that agreed spatially and temporally with these in situ and field measurements. A sensitivity study provided insights into the mechanics of the aggregation code by analyzing each aggregation process (collision kernel) independently, as well as by varying the fractal dimension of the newly formed aggregates. In addition, the airborne lifetime (e-folding) of total domain ash mass was analyzed for a range of fractal dimension, and a maximum reduction of 79.5 % of the airborne ash lifetime was noted.