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article

An Online Stream Monitoring Algorithm for Fraud Detection in the Transport of Goods

Paweł M. Białoń

Journal of Telecommunications and Information Technology > 2020 > nr 4 > 79--85

The process of monitoring vehicles used in road transports plays an important role in detecting fraud committed by drivers. Algorithm designers face a number of challenges, including large number of vehicles monitored, demands related to online calculations, and ability to easily explain fraud alarms triggered to supervisors who make final decisions about actions to be taken. In this paper, we propose...

article

Proposed Tasks of Enceladus Missions’ Instrumentation in the Context of Their Astrobiological Goals

Katarzyna Kubiak, Jan Kotlarz, Natalia Zalewska, Urszula Zielenkiewicz

Pomiary Automatyka Robotyka > 2020 > R. 24, nr 4 > 47--56

Enceladus, Saturnian satellite, is a very significant object for astrobiologists due to the presence of liquid water that forms the ice-covered ocean. Water ice geysers escape from the south pole region through cracks in the ice shield. During the Cassini flight, the probe took samples of plumes matter recognizing besides other methane and molecular hydrogen. Since then, hypotheses have been formulated...

article

The Microcontroller Implementation of the Basic Fractional-Order Element

Krzysztof Oprzędkiewicz, Maciej Rosół, Jakub Żegleń-Włodarczyk

Pomiary Automatyka Robotyka > 2020 > R. 24, nr 4 > 19--26

The paper presents the implementation of the basic fractional order element s^γ, γ ∈ R on the STM32 microcontroller platform. The implementation employs the typical CFE and FOBD approximations, the accuracy of approximation as well as duration of calculations are experimentally tested. Microcontroller implementation of fractional order elements is known; however, real-time tests of such implementations...

article

Odporny system sterowania ruchem drogowym bazujący na optymalizacji wielokryterialnej

Dobrosław Cieślewicz

Pomiary Automatyka Robotyka > 2020 > R. 24, nr 4 > 11--18

Model matematyczny jest uproszczonym odwzorowaniem pewnych zjawisk, które uwzględnia jedynie cechy istotne. W dzisiejszych czasach coraz większym problemem stają się przeciążone infrastruktury drogowe, szczególnie w większych ośrodkach miejskich. Problem ten można w pewnym stopniu zredukować, stosując zaawansowane algorytmy sterowania. W niniejszym artykule podjęto próbę sterowania przepływem ruchu...

article

Time-shifted Pilot-based Scheduling with Adaptive Optimization for Pilot Contamination Reduction in Massive MIMO

Ambala Pradeep Kumar, Tadisetty Srinivasulu

Journal of Telecommunications and Information Technology > 2020 > nr 4 > 10--21

Massive multiple-input multiple-output (MIMO) is considered to be an emerging technique in wireless communication systems, as it offers the ability to boost channel capacity and spectral efficiency. However, a massive MIMO system requires huge base station (BS) antennas to handle users and suffers from inter-cell interference that leads to pilot contamination. To cope with this, time-shifted pilots...

article

A Comprehensive Survey on Resource Management in Internet of Things

Lokesh B. Bhajantri, Gangadharaiah S.

Journal of Telecommunications and Information Technology > 2020 > nr 4 > 27--43

Efficient resource management is a challenging task in distributed systems, such as the Internet of Things, fog, edge, and cloud computing. In this work, we present a broad overview of the Internet of Things ecosystem and of the challenges related to managing its resources. We also investigate the need for efficient resource management and the guidelines given/suggested by Standard Development Organizations...

article

Detection of DDoS Attacks in OpenStack-based Private Cloud Using Apache Spark

Shweta Gumaste, Narayan D. D. G., Sumedha Shinde, Amit K.

Journal of Telecommunications and Information Technology > 2020 > nr 4 > 62--71

Security is a critical concern for cloud service providers. Distributed denial of service (DDoS) attacks are the most frequent of all cloud security threats, and the consequences of damage caused by DDoS are very serious. Thus, the design of an efficient DDoS detection system plays an important role in monitoring suspicious activity in the cloud. Real-time detection mechanisms operating in cloud environments...

article

Autonomous Instrumentation for Measuring Spontaneous Electromagnetic Emissions in Mining

Krzysztof Maniak, Remigiusz Mydlikowski

Journal of Telecommunications and Information Technology > 2020 > nr 4 > 98--103

This article presents the design of an innovative receiver capable of identifying electric and magnetic components of electromagnetic fields. The receiver senses and records electromagnetic disturbances generated as mine tunnels collapse. It offers excellent operating specification and the ability to sense and log magnetic and electrical component strength values in real time. The paper analyzes the...

article

Composite Propellant Formulation of Poly (16-, 32- and 64-) Azido Dendritic Esters as Energetic Plasticizer and Evaluation of Properties

Kanaka Durga Bhaskar Yamajala, Hema Singh, Ramesh Kurva, Mehilal Maurya, more

Central European Journal of Energetic Materials > 2020 > Vol. 17, no. 4 > 506--522

16-, 32- and 64-Polyazido hyperbranched dendrimers were synthesized from hydroxy terminated dendritic ester by following two steps namely, tosylation and azidation. The poly azido dendrimers were incorporated in composite propellant formulations as an energetic plasticizer. The physical, thermal sensitivity and ballistic properties of these composite propellants such as burning rate, Cal-val, density,...

article

Study of the synthesis of GAP-HTPB-GAP Liquid Copolymer

Michał Chmielarek, Paweł Maksimowski, Katarzyna Cieślak, Tomasz Gołofit, more

Central European Journal of Energetic Materials > 2020 > Vol. 17, no. 4 > 566--583

GAP and HTPB are polymers on which the copolymer obtained in our work is based. The following report indicates how to perform the polymerization reactions for these two polymers in order to obtain a copolymer that combines their individual positive physico-chemical properties. It demonstrates how the ratio of substrates and reaction conditions affect the polymer properties. It has been shown that...

article

The Effect of Detonator Shell Materials on Detonation Calorimetry Results

Ondřej Němec, Tomáš Musil, Martin Künzel

Central European Journal of Energetic Materials > 2020 > Vol. 17, no. 4 > 552--565

Detonation calorimetry is a method for the determination of the heat released by the detonation of an explosive charge. Compared to classical combustion calorimetry, detonation calorimetry requires an inert atmosphere, a large sample mass and a detonator for its initiation. This detonator releases some energy for which the results must be corrected. Four types of detonator have been tested in the...

article

Estimation of the Detonation Pressure of Co-crystal Explosives through a Novel, Simple and Reliable Model

Narges Zohari, Mahnaz Montazeri, Seyed Ghorban Hosseini

Central European Journal of Energetic Materials > 2020 > Vol. 17, no. 4 > 492--505

The detonation properties of energetic co-crystals have a substantial role in the design of new co-crystals and it is necessary to know about them. In this study, a linear relationship is proposed between the detonation pressure of energetic co-crystals and their molecular structures via a quantitative structure property relationship (QSPR) method. This model assumes that the detonation pressure of...

article

Regularities of Spheroidization of HMX Extracted from Solid Propellant Disposal Products

Maksym Cheltonov, Roman Zakusylo, Ievhen Ustymenko

Central European Journal of Energetic Materials > 2020 > Vol. 17, no. 4 > 523--534

Nitramines of high quality for manufacturing high-energy composites, such as oсtogen (HMX) and hexogen, have received much attention by researchers worldwide. Mixed formulations containing fillers in the form of spheroidal dispersed particles of explosives are homogenized at lower energy consumption. They are characterized by stable rheological characteristics, which guarantee the quality of the products...

article

The Preparation and Properties of Low-Nitrogen Nitrocellulose by Alkaline Denitration

Zhongan Tao, Shiying Li, Yajun Ding, Zhongliang Xiao

Central European Journal of Energetic Materials > 2020 > Vol. 17, no. 4 > 535--551

Waste high-nitrogen nitrocellulose (NC) has always been disposed of as hazardous material for destruction, and has not been recycled as a resource. The present work describes how waste high-nitrogen NC may be converted to low-nitrogen NC via an alkaline denitration reaction between sodium hydrosulfide and the nitrate ester groups, in order to control and reduce the nitrogen content for industrial...

article

Temperature and ice regimes of waterbodies under the impacts of global warming and a hydropower plant

Viktor Ivanovych Vyshnevskyi

Meteorology Hydrology and Water Management. Research and Operational Applications > 2020 > Vol. 8, Iss. 2 > 38--45

Based on the results of regular monitoring and remote sensing data the patterns of water temperature and ice regime of the Dnipro River within Kyiv, as affected by global warming and a hydropower plant, were identified. The characteristic features of this stretch of the river are increasing water temperature, and the decreasing thickness and duration of ice cover. The largest water temperature increase...

article

Simulating the influence of doubled CO2 on the water budget over West Africa using RegCM4.7

Mojisola Oluwayemisi Adeniyi

Meteorology Hydrology and Water Management. Research and Operational Applications > 2020 > Vol. 8, Iss. 2 > 12--19

This paper simulates the responses of water budget components to doubled CO2 (2 × 378 ppm) concentration in the atmosphere with atmospheric and oceanic surface warming of 2°C. Simulations employed version 4.7 of the Regional Climate Model of the International Centre for Theoretical Physics (ICTP). Two six-year experiments were each repeated twice with the same model physics and parameterizations....

article

Trends in monthly, seasonal, and annual fluctuations in flood peaks for the upper Dniester River

Serhii Melnyk, Nataliia Loboda

Meteorology Hydrology and Water Management. Research and Operational Applications > 2020 > Vol. 8, Iss. 2 > 28--36

The importance of the Dniester River in the socio-economic life of Moldova and Ukraine necessitates research into the main trends in the river’s runoff characteristics and dynamics, especially now, when climate change is significantly altering the water regime of rivers. This paper presents a solution for the problems of identifying the main trends in daily maximum river discharge by seasons and months...

article

Bioclimatic zoning of the territory of Ukraine based on human thermal state assessment

Liudmyla Malytska, Stanislav Moskalenko

Meteorology Hydrology and Water Management. Research and Operational Applications > 2020 > Vol. 8, Iss. 2 > 20--26

This research focuses on objective assessment of bioclimatic conditions through analyses of biometeorological indices based on Harrington’s desirability function. Evaluation criteria for the Harrington desirability function during winter are: Bodman’s winter severity index (S), equivalent-efficient temperatures (EETA), index of wind cooling (K0), and wind chill temperature (WC). These metrics were...

article

SWOT analysis of the Institute of Meteorology and Water Management - National Research Institute in the context of World Meteorological Organization Reform adopted during its 18th Congress

Tomasz Walczykiewicz, Janusz Filipiak

Meteorology Hydrology and Water Management. Research and Operational Applications > 2020 > Vol. 8, Iss. 2 > 5--11

This article is an analysis of how the World Meteorological Organization (WMO) constituent bodies governance reform (WMO Reform) can affect the activities of the Polish National Hydrological and Meteorological Service. The analysis employs the SWOT (Strengths, Weaknesses, Opportunities, Threats) model. The World Meteorological Congress is the highest authority of the World Meteorological Organization,...

article

Flood frequency analysis for an ungauged Himalayan river basin using different methods: a case study of Modi Khola, Parbat, Nepal

Bibek Acharya, Bisesh Joshi

Meteorology Hydrology and Water Management. Research and Operational Applications > 2020 > Vol. 8, Iss. 2 > 46--51

Predicting flood discharges in the rivers of an ungauged basin is tedious because essential hydrological data is lacking. In mountainous countries like Nepal, the design of hydraulic structures in these steeply sloped rivers is of prime importance for flood control, as well as for electricity generation where hydraulic head is gained over short, steep reaches. This study illustrates a variety of approaches...

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Search results

An Online Stream Monitoring Algorithm for Fraud Detection in the Transport of Goods

Proposed Tasks of Enceladus Missions’ Instrumentation in the Context of Their Astrobiological Goals

The Microcontroller Implementation of the Basic Fractional-Order Element

Odporny system sterowania ruchem drogowym bazujący na optymalizacji wielokryterialnej

Time-shifted Pilot-based Scheduling with Adaptive Optimization for Pilot Contamination Reduction in Massive MIMO

A Comprehensive Survey on Resource Management in Internet of Things

Detection of DDoS Attacks in OpenStack-based Private Cloud Using Apache Spark

Autonomous Instrumentation for Measuring Spontaneous Electromagnetic Emissions in Mining

Composite Propellant Formulation of Poly (16-, 32- and 64-) Azido Dendritic Esters as Energetic Plasticizer and Evaluation of Properties

Study of the synthesis of GAP-HTPB-GAP Liquid Copolymer

The Effect of Detonator Shell Materials on Detonation Calorimetry Results

Estimation of the Detonation Pressure of Co-crystal Explosives through a Novel, Simple and Reliable Model

Regularities of Spheroidization of HMX Extracted from Solid Propellant Disposal Products

The Preparation and Properties of Low-Nitrogen Nitrocellulose by Alkaline Denitration

Temperature and ice regimes of waterbodies under the impacts of global warming and a hydropower plant

Simulating the influence of doubled CO2 on the water budget over West Africa using RegCM4.7

Trends in monthly, seasonal, and annual fluctuations in flood peaks for the upper Dniester River

Bioclimatic zoning of the territory of Ukraine based on human thermal state assessment

SWOT analysis of the Institute of Meteorology and Water Management - National Research Institute in the context of World Meteorological Organization Reform adopted during its 18th Congress

Flood frequency analysis for an ungauged Himalayan river basin using different methods: a case study of Modi Khola, Parbat, Nepal

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