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Tytuł:
Application of RRAP reliability optimization as a test of nature-inspired algorithms
Autorzy:
Pieprzycki, Adam
Filipowicz, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/35533466.pdf
Data publikacji:
2024-02-15
Wydawca:
Akademia Tarnowska
Tematy:
reliability optimization
RRAP
Firefly Algorithm (FA)
Cuckoo Search (CS)
ANOVA
Lévy flight
Opis:
This paper presents a discussion on the application of two swarm intelligence algorithms, Cuckoo Search (CS) and Firey Algorithm (FA), to maximize the reliability of two complex systems with resource constraints, which have been well-known in the literature. The reliability of the systems is also evaluated using several classical methods. The results indicate that although the CS algorithm, which utilizes Lévy flight, is eective, the FA rey algorithm outperformed it in the presented optimization tasks, within the given parameter range. These ndings contribute to the ongoing discussion on using nature-inspired algorithms for solving Reliability Redundancy Allocation Problem (RRAP) problems, and the two test scenarios used in the study can be useful for validating other algorithms in RRAP problems. The paper introduces metrics and methods for analyzing and comparing the performance of algorithms in RRAP optimization, including the comparison of criterion function values and other parameters introduced in the paper. Additionally, the paper discusses statistical analyses of variance (ANOVA) with post-hoc RIR Tuckey tests.
Źródło:
Science, Technology and Innovation; 2023, 18, 3-4; 1-14
2544-9125
Pojawia się w:
Science, Technology and Innovation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of potential risks of SMS-based authentication
Autorzy:
Szpunar, Albert
Stęchły, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/31233158.pdf
Data publikacji:
2023
Wydawca:
Patryk Organiściak
Tematy:
authentication
cyber security
two-factor authentication
2FA
SMS
text message
uwierzytelnianie
bezpieczeństwo cybernetyczne
uwierzytelnianie dwuskładnikowe
wiadomość tekstowa
Opis:
The pervasive use of mobile devices and the omnipresence of the Internet have ushered in a transformative era. Nearly everyone, regardless of age, possesses a mobile phone, bridging generational gaps in digital interaction. Mobile phones have become highly personal, with users guarding them zealously. Service providers recognize this intimate relationship, offering an opportunity to enhance security. Traditional password-based security is vulnerable to data breaches, prompting the adoption of mobile phones as a more robust platform for safeguarding digital assets. This shift has also facilitated the development of digital identification applications, reducing reliance on physical identity documents. Additionally, mobile banking applications are replacing physical payment cards, enabling secure transactions. The ascendancy of mobile payment solutions is diminishing the role of physical cash and wallets. In summary, mobile devices have reshaped security and daily activities, becoming the cornerstone of our digital existence, offering higher levels of security, convenience, and efficiency.
Źródło:
Advances in Web Development Journal; 2023, 1; 13-25
2956-8463
Pojawia się w:
Advances in Web Development Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protecting web applications from authentication attacks
Autorzy:
Gugała, Łukasz
Łaba, Kamil
Dul, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/31233161.pdf
Data publikacji:
2023
Wydawca:
Patryk Organiściak
Tematy:
web application security
cybersecurity
2FA
authentication
two-factor authentication
bezpieczeństwo aplikacji internetowych
bezpieczeństwo cybernetyczne
uwierzytelnianie
uwierzytelnianie dwuskładnikowe
Opis:
This paper explores the critical domain of safeguarding web-based applications against authentication attacks, recognizing the persistent challenges posed by evolving cyber threats. The project delineates the distinct objectives of such attacks, including data theft, identity theft, and service disruption, underlining their potential far-reaching implications, such as the compromise of sensitive corporate data and the execution of unauthorized administrative operations. It underscores the pivotal role of user awareness and education as the ultimate defense against authentication-related breaches. Robust security measures, encompassing the use of strong, intricate passwords, encrypted network communication, two-factor authentication, and the regulation of failed login attempts, are emphasized as essential safeguards. Additionally, the project underscores the significance of maintaining system components through regular updates and conducting comprehensive security audits. A holistic approach, integrating technical and human factors, underscores user awareness and ongoing training as indispensable elements in the endeavor to enhance security in an increasingly digital landscape. "Protecting Web Applications from Authentication Attacks" aims to equip its readers with a comprehensive understanding of authentication system security and offers practical directives for bolstering defense mechanisms in a professional and formal context.
Źródło:
Advances in Web Development Journal; 2023, 1; 26-42
2956-8463
Pojawia się w:
Advances in Web Development Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of Reconfigurable Multiple Shaped Beams of a Concentric Circular Ring Array Antenna Using Evolutionary Algorithms
Autorzy:
Dubey, Sanjay Kumar
Mandal, Debasis
Powiązania:
https://bibliotekanauki.pl/articles/2200965.pdf
Data publikacji:
2023
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
cosec2 beam
differential evolution algorithm (DE)
firefly algorithm (FA)
flat top beam
genetic algorithm (GA)
multiple shaped beam patterns
pencil beam
Opis:
The approach described in this paper uses evolutionary algorithms to create multiple-beam patterns for a concentric circular ring array (CCRA) of isotropic antennas using a common set of array excitation amplitudes. The flat top, cosec2, and pencil beam patterns are examples of multiple-beam patterns. All of these designs have an upward angle of θ = 0◦. All the patterns are further created in three azimuth planes (φ = 0◦, 5◦, and 10◦). To create the necessary patterns, non-uniform excitations are used in combination with evenly spaced isotropic components. For the flat top and cosecant-squared patterns, the best combination of common components, amplitude and various phases is applied, whereas the pencil beam pattern is produced using the common amplitude only. Differential evolutionary algorithm (DE), genetic algorithm (GA), and firefly algorithm (FA) are used to generate the best 4-bit discrete magnitudes and 5-bit discrete phases. These discrete excitations aid in lowering the feed network design complexity and the dynamic range ratio (DRR). A variety of randomly selected azimuth planes are used to verify the excitations as well. With small modifications in the desired parameters, the patterns are formed using the same excitation. The results proved both the efficacy of the suggested strategy and the dominance of DE over GA as well as FA.
Źródło:
Journal of Telecommunications and Information Technology; 2023, 1; 8--17
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-factor authentication (2FA) comparison of methods and applications
Autorzy:
Florczak, Sebastian
Jasiak, Adrian
Szczygieł, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/31233162.pdf
Data publikacji:
2023
Wydawca:
Patryk Organiściak
Tematy:
cybersecurity
authentication
two-factor authentication
2FA
bezpieczeństwo cybernetyczne
uwierzytelnianie
uwierzytelnianie dwuskładnikowe
Opis:
In this document, the investigation delves into the realm of two-factor authentication (2FA), exploring its applications and comparing various methods of implementation. Two-factor authentication, often referred to colloquially as two-step verification, serves to enhance credential security during login processes across platforms such as Facebook and online banking, among others. While 2FA has significantly improved the security of the login and registration processes, it is noteworthy that its adoption tends to be more prevalent among younger individuals. Unfortunately, an increasing number of financial scams target older individuals who may be disinclined to engage with what they perceive as the complexity of multi-step authentication and password confirmation. Subsequent chapters provide a discussion of the various types of two-factor authentication, furnish detailed descriptions, and offer a summary of the benefits and gains achievable through the deployment of 2FA.
Źródło:
Advances in Web Development Journal; 2023, 1; 26-45
2956-8463
Pojawia się w:
Advances in Web Development Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study on carbonation depth prediction for concrete made with GBFS cement and FA addition
Badanie dotyczące prognozowania głębokości karbonatyzacji betonu wykonanego z cementu GBFS z dodatkiem FA
Autorzy:
Lech, Maciej
Juszczak, Tomasz
Wawrzeńczyk, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2124786.pdf
Data publikacji:
2022
Wydawca:
Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:
concrete carbonation
carbonation model
carbonation accelerated testing
GBFS cement
FA addition
karbonatyzacja betonu
model karbonatyzacji
przyspieszone badania karbonatyzacji
cement GBFS
dodatek FA
Opis:
This paper presents the results of the examination of accelerated carbonation of concrete mixes made with CEM III / A blast furnace slag cement and the addition of fly ash. The test program was developed using an experiment design with two factors: a water-binder ratio and a fly-ash / cement ratio. Carbonation depth measurements were carried out according to FprCEN/TS 12390-12 (CO2 concentration = 4%, T = 20°C, RH = 55%). Associated tests were also carried out, including compressive strength, porosity, depth of absorption, water penetration depth, and capillary suction. Analysis of the test results allowed us to determine the influence of binder composition on concrete carbonization depth under standard test conditions. The results show that the carbonation depth increases along with the increase in the W/B ratio and as a result of the increase in the fly ash content in the binder. A mathematical model was developed to describe the carbonation process over time, which can predict the depth and rate of concrete carbonation. Furthermore, it was found that there is no close relationship between other properties tested (e.g. strength) and the depth of the carbonated concrete.
W pracy przedstawiono wyniki badań przyspieszonej karbonatyzacji mieszanek betonowych wytworzonych cementem żużlowym wielkopiecowym CEM III/A z dodatkiem popiołu lotnego. Program badań został opracowany na podstawie projektu eksperymentu z dwoma czynnikami: stosunkiem wody do spoiwa oraz stosunkiem popiołu lotnego do cementu. Pomiary głębokości karbonatyzacji przeprowadzono zgodnie z FprCEN/TS 12390-12 (stężenie CO2 = 4%, T = 20°C, RH = 55%). Przeprowadzono również powiązane testy, w tym wytrzymałości na ściskanie, porowatości, głębokości absorpcji, głębokości penetracji wody i ssania kapilarnego. Analiza wyników badań pozwoliła na określenie wpływu składu spoiwa na głębokość karbonatyzacji betonu w standardowych warunkach testowych. Wyniki wskazują, że wraz ze wzrostem stosunku W/B oraz zawartością popiołu lotnego w spoiwie wzrasta głębokość karbonatyzacji. Opracowano model matematyczny do opisu procesu karbonatyzacji w czasie, który umożliwia przewidywanie głębokości i szybkości karbonatyzacji betonu. Ponadto stwierdzono, że nie ma ścisłego związku między innymi badanymi właściwościami (np. wytrzymałością) a głębokością betonu karbonatyzowanego.
Źródło:
Structure and Environment; 2022, 14, 1; 1--10
2081-1500
Pojawia się w:
Structure and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of waste paper ash or wood ash as substitution to fly ash in production of geopolymer concrete
Autorzy:
Owaid, Haider M.
Al-Rubaye, Muna M.
Al-Baghdadi, Haider M.
Powiązania:
https://bibliotekanauki.pl/articles/35545367.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
geopolymer concrete
GC
fly ash
FA
waste paper ash
WPA
wood ash
WA
alkaline solution
Opis:
Large quantities of paper and wood waste are generated every day, the disposal of these waste products is a problem because it requires huge space for their disposal. The possibility of using these wastes can mitigate the environmental problems related to them. This study presents an investigation on the feasibility of inclusion of waste paper ash (WPA) or wood ash (WA) as replacement materials for fly ash (FA) class F in preparation geopolymer concrete (GC). The developed geopolymer concretes for this study were prepared at replacement ratios of FA by WPA or WA of 25, 50, 75 and 100% in addition to a control mix containing 100% of FA. Sodium hydroxide (NaOH) solutions and sodium silicate (Na2SiO3) are used as alkaline activators with 1M and 10M of sodium hydroxide solution.The geopolymer concretes have been evaluated with respect to the workability, the compressive strength, splitting tensile strength and flexural strength. The results indicated that there were no significant differences in the workability of the control GC mix and the developed GC mixes incorporating WPA or WA. Also, the results showed that, by incorporating of 25–50% PWA or 25% WA, the mechanical properties (compressive strength, splitting tensile strength and flexural strength) of GC mixes slightly decreased. While replacement with 75–100% WPA or with 50–100% WA has reduced these mechanical properties of GC mixes. As a result, there is a feasibility of partial replacement of FA by up to 50% WPA or 25% WA in preparation of the geopolymer concrete.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2021, 30, 3; 464-476
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of water treatment plants quality in Basrah Province, by factor and cluster analysis
Autorzy:
Al Saad, Zainb A.A.
Hamdan, Ahmed N.A.
Powiązania:
https://bibliotekanauki.pl/articles/293213.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
cluster analysis (CA)
factor analysis (FA)
multivariate statistics
the Shatt Al Arab River
water quality
water treatment plant
Opis:
The Shatt Al Arab River (SAAR) is a major source of raw water for most water treatment plants (WTP’s) located along with it in Basrah province. This study aims to determine the effects of different variables on water quality of the SAAR, using multivariate statistical analysis. Seventeen variables were measured in nine WTP’s during 2017, these sites are Al Hussain (1), Awaissan (2), Al Abass (3), Al Garma (4), Mhaigran (5), Al Asmaee (6), Al Jubaila (7), Al Baradia (8), Al Lebani (9). The dataset is treated using principal component analysis (PCA) / factor analysis (FA), cluster analysis (CA) to the most important factors affecting water quality, sources of contamination and the suitability of water for drinking and irrigation. Three factors are responsible for the data structure representing 88.86% of the total variance in the dataset. CA shows three different groups of similarity between the sampling stations, in which station 5 (Mhaigran) is more contaminated than others, while station 3 (Al Abass) and 6 (Al Asmaee) are less contaminated. Electrical conductivity (EC) and sodium adsorption ratio (SAR) are plotted on Richard diagram. It is shown that the samples of water of Mhaigran are located in the class of C4-S3 of very high salinity and sodium, water samples of Al Abass station, are located in the class of C3-S1 of high salinity and low sodium, and others are located in the class of C4-S2 of high salinity and medium sodium. Generally, the results of most water quality parameters reveal that SAAR is not within the permissible levels of drinking and irrigation.
Źródło:
Journal of Water and Land Development; 2020, 46; 10-19
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ZrO2 Gelcast Foams Coated with Apatite Layers
Autorzy:
Potoczek, M.
Kocyło, E.
Krauz, M.
Tłuczek, A.
Powiązania:
https://bibliotekanauki.pl/articles/351260.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gel-casting of foams
porous ZrO2
fluorapatite
FA
hydroxyapatite
HA
coating
Opis:
In this work, gel-casting of foams method was used to produce ZrO2 porous ceramics. The obtained foams with total porosity of 89.5 vol% were composed of approximately spherical cells having the mean diameter of 537 ± 153 μm interconnected by circular cell windows having the mean diameter of 152 ± 82 μm. Next, the ZrO2 foams were coated with fluorapatite (FA) and hydroxyapatite (HA) layers by slurry infiltration. The intermediate fluorapatite (FA) layer was introduced to prevent the chemical reactions between ZrO2 and HA at high temperatures during sintering process. The ZrO2 samples containing only HA coatings, were also tested, for comparison. The obtained ceramic biomaterials were subjected to in vitro tests in the simulated body fluid (SBF) solution. The results show that the ZrO2 foams with FA/HA layers possessed better bioactivity than the foams with the HA/HA coating.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 885-891
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and biological properties of ferulic acid
Autorzy:
Dędek, Kamil
Rosicka-Kaczmarek, Justyna
Nebesny, Ewa
Kowalska, Gabriela
Powiązania:
https://bibliotekanauki.pl/articles/410448.pdf
Data publikacji:
2019
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
ferulic acid
FA
health-promoting properties of FA
synthesis of FA in plants
metabolism of FA
kwas ferulowy
własciwości prozdrowotne kwasu ferulowego
synteza kwasu ferulowego u roślin
metabolizm kwasu ferulowego
Opis:
The interest in the properties of hydroxycinnamic acids with health-promoting properties is constantly increasing. That is why more and more research is being conducted to better understand these properties. Ferulic acid, FA (4-hydroxy-3-methoxycinnamic acid) is a derivative of hydroxycinnamic acid found in the plant tissue. It is possible to find him among others in bran cereal, popcorn bamboo shoots, and coffee. According to available literature data ferulic acid has a lot of biological properties, particularly appreciated in medicine. Its bioactive properties effectively contribute to the fight against diseases described as a civilization, including neurodegenerative diseases that increase the incidence. As reported the World Alzheimer Report, the number of people with dementia progression in 2016 exceeded 47.5 million, of which 33.5 million were diagnosed with Alzheimer's disease. According to the WHO estimates, this number will triple by 2050. The manuscript presents health-promoting properties of FA on the example of its antioxidant, antidiabetic, hepatoprotective, anti-atherosclerotic, neuroprotective, antineoplastic and antibacterial properties. In addition, the reaction of its synthesis in plants and in-vivo metabolization have been explained. The collected data suggest that bioactive FA molecules can effectively reduce the risk of civilization diseases and significantly reduce the level of oxidative stress contributing to the formation of neurodegenerative diseases.
Źródło:
Biotechnology and Food Science; 2019, 83, 1; 71-85
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Egzamin w locie
Autorzy:
Kowalska-Sendek, Magdalena.
Powiązania:
Polska Zbrojna 2020, nr 1, s. 44-47
Data publikacji:
2019
Tematy:
Siły powietrzne
Szkolenie wojskowe
Lockheed Martin F-16 Fighting Falcon (samolot)
Alenia Aermacchi M-346 FA (samolot)
Piloci wojskowi
Artykuł z czasopisma wojskowego
Opis:
Artykuł omawia szkolenie pilotów na samolotach M-346 Bielik w 4 Skrzydle Lotnictwa Szkolnego. W ramach szkolenia odbywano m.in. loty z widocznością oraz według przyrządów czy atakowanie celów naziemnych. Szkolenie trwało 8 miesięcy, odbyło je 4 podchorążych. Pierwsze szkolenie tego typu rozpoczęło się w kwietniu 2019 roku.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Prawo jako narzędzie polityczne w chińskiej perspektywie legistycznej
Autorzy:
Michoński, Dominik
Powiązania:
https://bibliotekanauki.pl/articles/1811263.pdf
Data publikacji:
2019-12-11
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
filozofia prawa
legizm
fa
filozofia chińska
legal philosophy
legalism
Chinese philosophy
Opis:
Niniejszy artykuł ma na celu zwięzłe przedstawienie chińskiego nurtu filozoficznego zwanego legizmem. Praca oparta jest przede wszystkim na autorskich tłumaczeniach klasycznych dzieł filozofii chińskiej oraz publikacjach naukowych pochodzących ze źródeł anglojęzycznych. W pracy opisano podstawowe dla nurtu legistycznego teorie i pojęcia, w tym ze szczególną wnikliwością przeanalizowano koncepcję prawa (fa) i podjęto próbę odniesienia jej zarówno do zapatrywań konfucjańskich, jak i do realiów europejskich.
This article aims to concisely present the thought of the Chinese legalist school of philosophy. The essay is based on translations of classical Chinese philosophical texts by the author and on academic publications in English. Basic legalist theories and notions are explained, and the concept of laws (fa) is analyzed with special care and compared with Confucian views and the European political reality.
Źródło:
DOCTRINA. Studia Społeczno-Polityczne; 2016, 13, 13; 133-155
1730-0274
Pojawia się w:
DOCTRINA. Studia Społeczno-Polityczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced helical gear reducer design optimization through nature inspired algorithms
Autorzy:
Ebenezer, N. Godwin Raja
Saravanan, R.
Ramabalan, S.
Navaneethasanthakumar, S.
Powiązania:
https://bibliotekanauki.pl/articles/1178368.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
CS
DIN Standards
FA
GA
Helical gear reducer design
MATLAB solvers fmincon
Nature inspired Algorithms SA
metaheuristics
optimization
Opis:
In this paper a high power helical gear pair design optimization problem is solved. It is a multi variable, complex non linear problem with derived objective function and constraints. The objective is to minimize the volume of the gear. The design parameters considered are module, face width, number of teeth on drive and driven and helix angle. The various factors for sizing and strength of gear geometry parameters are based on German Institute for Standardization (DIN) Standards. Nature inspired algorithms, namely, Simulated Annealing (SA), Fire fly (FA) and Cuckoo Search (CS) and MATLAB solvers fmincon, GA are used. Simulation results are analysed and compared with literature.
Źródło:
World Scientific News; 2017, 77, 2; 267-280
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Hydrogen Bonds in TGS Crystals Observed by Means of Measurements of Pyroelectric Currents Induced by Linear Changes of Temperature
Autorzy:
Trybus, M.
Paszkiewicz, T.
Woś, B.
Powiązania:
https://bibliotekanauki.pl/articles/1032468.pdf
Data publikacji:
2017-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.70.+a
77.84.Fa
77.80.B-
Opis:
The study of pyroelectric response of monocrystalline TGS cubic specimens to changes of temperature induced by linear and pulse heating of three mutually perpendicular pairs of cube sides demonstrated a complicated structure of signals. We attribute their forms to the activation of various hydrogen bonds between glycine G1, G2, and G3 molecules. In the case of pulse heating the pyroelectric signal is observed also in the paraelectric phase.
Źródło:
Acta Physica Polonica A; 2017, 132, 1; 161-163
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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