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Tytuł:
Lead and iron contents in parsley being cultivated in the area of Chrzanów geochemical anomaly
Autorzy:
Mundała, P.
Szwalec, A.
Kędzior, R.
Telk, M.
Machaj, M.
Powiązania:
https://bibliotekanauki.pl/articles/184541.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
parsley
geochemical anomaly
food quality
Opis:
Selected research polygon is located in Trzebinia commune in the mid of the 80 km way from Kraków to Katowice (the Upper Silesia capital). The towns of Trzebinia, Chrzanów within the towns of Krzeszowice, Jaworzno, Mysłowice, have been creating a base of well-connected Kraków-Upper Silesia agglomeration. The inhabitants of Trzebinia commune are flexible on labour market, often commute to work in Kraków or Katowice. They have detached houses with gardens of one or two acres size, where "home-made", fresh, low-processed food could be produced. At the same time the area of Trzebinia Community belongs to Chrzanów geochemical anomaly, which is reflected in high values of cadmium, lead and zinc contents in the soils. This is the result of both natural and anthropogenic factors. The purpose of the paper was to evaluate lead and iron contents in roots and leaves of parsley being cultivated within the area of the anomaly. Considering, there is a positive geochemical anomaly, the lead contents in soil were low - the average value was 88.67 mg kg -1 d.m. and only two contents -218.98 and 119.35 exceeded 100 mg kg -1 d.m. On the other hand the lead contents in parsley roots were high, many times higher than the allowable values. The lead contents in parsley leaves were also high. Phytoaccumulation indices low, only one had the average value, but at their minimal range (1.02 and 10.3 adequately for leaves and roots). Translocation index of lead was close to one. The iron contents in soils were not high and fall within the scope of low and average ranges that occur in Polish soils. The iron contents in leaves were high, attractive from nutrition point of view.
Źródło:
Geology, Geophysics and Environment; 2014, 40, 4; 377-386
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relative Vorticity at the Pressure Level 850 hPa and SSTA in Southeast Asia Causing Precipitation Anomaly over Thailand
Autorzy:
Chansaengkrachang, K.
Luadsong, A.
Aschariyaphotha, N.
Powiązania:
https://bibliotekanauki.pl/articles/124741.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
relative vorticity
SSTA
precipitation anomaly
Opis:
Monthly relative vorticity and the relative vorticity anomaly at pressure level 850 hPa are computed to study circulation over Southeast Asia associated with the rainfall over Thailand. Monthly mean rainfall is averaged during the years 1979 to 2013 over Thailand to study the trends of rainfall and to analyze the difference between the SSTA in a dry year (1992) and a wet year (1999), and the precipitation anomaly. Rotation of the relative vorticity over Thailand during the rainy season in 1999 is supported by the westerly wind from the Indian Ocean. Relative vorticity over Thailand in October to December are brought by the wind from the east toward the west of the South China Sea. The positive value of relative vorticity in 1992 is less than in 1999. This is consistent with the precipitation anomalies in 1992 and 1999. Clearly, the rainfall and precipitation anomaly over Thailand in wet year 1992 and dry year 1999 are consistent with the relative vorticity at pressure level 850 hPa. Both years are also associated with the SSTA. It can be concluded that the large amounts of rainfall over Thailand are associated with the positive values of relative vorticity at pressure level 850 hPa and SSTA over Southeast Asia. The daily relative vorticity at pressure level 850 hPa and SSTA over Southeast Asia during Typhoon Linda is analyzed in the research. The positive value of relative vorticity is consistent with circulation during Typhoon Linda which is brought by winds from the South China Sea, and the SSTA is also unusual over the Gulf of Thailand and the Andaman Sea. These are the causes of violent storms in Thailand during Typhoon Linda.
Źródło:
Journal of Ecological Engineering; 2017, 18, 3; 1-12
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Database security : combining neural networks and classification approach
Autorzy:
Skaruz, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1819254.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
database
security
anomaly detection
neural networks
Opis:
In the paper we present a new approach based on application of neural networks to detect SQL attacks. SQL attacks are those attacks that take the advantage of using SQL statements to be performed. The problem of detection of this class of attacks is transformed to time series prediction problem. SQL queries are used as a source of events in a protected environment. To differentiate between normal SQL queries and those sent by an attacker, we divide SQL statements into tokens and pass them to our detection system, which predicts the next token, taking into account previously seen tokens. In the learning phase tokens are passed to a recurrent neural network (RNN) trained by backpropagation through time (BPTT) algorithm. Then, two coefficients of the rule are evaluated. The rule is used to interpret RNN output. In the testing phase RNN with the rule is examined against attacks and legal data to find out how evaluated rule affects efficiency of detecting attacks. All experiments were conducted on Jordan network. Experimental results show the relationship between the rule and a length of SQL queries.
Źródło:
Studia Informatica : systems and information technology; 2019, 1-2(23); 95--115
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incoherent Dictionary Learning for Sparse Representation in Network Anomaly Detection
Autorzy:
Andrysiak, Tomasz
Saganowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1373708.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
dictionary learning
sparse representation
anomaly detection
Opis:
In this article we present the use of sparse representation of a signal and incoherent dictionary learning method for the purpose of network traffic analysis. In learning process we use 1D INK-SVD algorithm to detect proper dictionary structure. Anomaly detection is realized by parameter estimation of the analyzed signal and its comparative analysis to network traffic profiles. Efficiency of our method is examined with the use of extended set of test traces from real network traffic. Received experimental results confirm effectiveness of the presented method.
Źródło:
Schedae Informaticae; 2015, 24; 63-71
0860-0295
2083-8476
Pojawia się w:
Schedae Informaticae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of lip and/or palate clefts types among children form Lodz during years 1981-2015
Autorzy:
Antoszewski, Bogusław
Fijałkowska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/1392644.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
cleft
lip
palate
type of anomaly
Opis:
Introduction: Cleft lip and/or palate are the most common face malformations. The clinical picture of these anomalies is very variable. Cleft can include only the lip and/or alveolus, palate or all of these structures can be clefted. Aim: The aim of this paper is to present all particular types of clefts, their relationship to gender and body side in the group of children born in Lodz during the years 1981-2015. Material and method: The study group included 434 patients with facial clefts (218 males and 216 females) in the age between 4 weeks to 18 years who were born in Lodz during years 1981-2015. Results: In the analyzed group, there were 181 palate clefts (41.7%), 156 lip and palate clefts (36%) and 97 lip clefts (22.3%). A detailed analysis of clefts types showed that isolated palate clefts are definitely more frequent in females than males (112 vs. 69), while lip and palate clefts in boys than girls (96 vs. 60), furthermore left-sided clefts are more common than right-sided. Conclusions: During 35 years, the most common type of anomaly in children born in Lodz were palate clefts, followed by lip and palate clefts and the less frequent lip clefts. Palate clefts are more common in girls, while lip and palate clefts in boys. Left-sided clefts are two times more common than right-sided clefts.
Źródło:
Polish Journal of Surgery; 2018, 90, 3; 1-6
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anomalie platynowców w historii Ziemi
PGE anomalies in Earths history
Autorzy:
Wieczorek, Anna
Brachaniec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033071.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
PGE
anomaly
geology
impact
platinum-group elements
Opis:
The platinum-group elements comprise a very small percentage of elements in the earth’s crust. The primary sources of them are meteorite impacts and volcanism. The study of PGEs anomaly in sediment profiles as a possible indicator of impact began in 1980, when was suggested a link between high levels of iridium and the mass extinction event in Late Cretaceous.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2016, 7; 177-181
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niejednoznaczność transformacji UML-GML
UML-GML transformation ambiguity
Autorzy:
Chojka, A.
Powiązania:
https://bibliotekanauki.pl/articles/346431.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Informacji Przestrzennej
Tematy:
UML
GML
kodowanie
niejednoznaczność
anomalia
encoding
ambiguity
anomaly
Opis:
Uchwalenie w Polsce ustawy o infrastrukturze informacji przestrzennej, która jest transpozycją Dyrektywy INSPIRE spowodowało konieczność nowelizacji wielu ustaw i przepisów prawnych, w tym ustawy prawo geodezyjne i kartograficzne. Postanowiono zastąpić instrukcje i wytyczne rozporządzeniami Rady Ministrów lub odpowiedniego ministra, które z jednej strony stanowią załączniki do ustawy prawo geodezyjne i kartograficzne, a z drugiej strony wprowadzają w życie niektóre zalecenia Dyrektywy INSPIRE. Integralną częścią opracowywanych w Głównym Urzędzie Geodezji i Kartografii rozporządzeń są schematy aplikacyjne UML oraz GML, które definiują strukturę informacyjną baz danych, odpowiednich dla danego rozporządzenia. Jednak, mimo iż schematy te zostały przygotowane zgodnie z normami ISO serii 19100 w dziedzinie informacji geograficznej, w trakcie ich tworzenia napotkano wiele problemów technicznych związanych z transformacją UML-GML. W artykule, na przykładzie schematów aplikacyjnych UML i GML opracowanych w ramach prac GUGiK związanych z implementacją postanowień Dyrektywy INSPIRE, omówiono niejednoznaczności związane z przekształcaniem UML na GML oraz związane z tym błędy i anomalia. Rozważono również, jak zaradzić tego typu niejednoznacznościom, jak zapewnić jedną drogę przekształcania schematu aplikacyjnego UML na odpowiadający mu schemat aplikacyjny GML.
Passing the “Spatial Information Infrastructure Law” in Poland, that is a transposition of the INSPIRE Directive, involved the necessity of many secondary acts and corresponding changes in other Laws, among others the “Geodetic and Cartographic Law”. Decision was made to replace the existing instructions and guidelines by regulations of the Council of Ministers or relevant minister that, on the one hand, become annexes to the “Geodetic and Cartographic Law” and, on the other hand, implement the recommendations of the INSPIRE Directive. An integral part of these regulations elaborated in the Head Office of Geodesy and Cartography in Poland are the UML and GML application schemas that define information structures of databases, corresponding to each regulation. Although these schemas were worked out according to the ISO 19100 series of International Standards in the Geographic Information (Geoinformation/Geomatics) domain, many technical problems connected with UML-GML transformation were identified during their preparation. In this paper, on examples of UML and GML application schemas prepared in the Head Office of Geodesy and Cartography in Poland within the INSPIRE Directive implementation works, some ambiguities concerning UML to GML transformation were discussed as well as some errors and anomalies connected with this issues. Questions how to resolve this ambiguity and how to ensure single way in changing UML application schema into corresponding GML application schema were also considered.
Źródło:
Roczniki Geomatyki; 2013, 11, 1(58); 21-32
1731-5522
2449-8963
Pojawia się w:
Roczniki Geomatyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detecting anomalies in advertising web traffic with the use of the variational autoencoder
Autorzy:
Gabryel, Marcin
Lada, Dawid
Filutowicz, Zbigniew
Patora-Wysocka, Zofia
Kisiel-Dorohinicki, Marek
Chen, Guang Yi
Powiązania:
https://bibliotekanauki.pl/articles/2147149.pdf
Data publikacji:
2022
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
anomaly detection
web traffic
ad fraud
variational autoencoder
Opis:
This paper presents a neural network model for identifying non-human traffic to a website, which is significantly different from visits made by regular users. Such visits are undesirable from the point of view of the website owner as they are not human activity, and therefore do not bring any value, and, what is more, most often involve costs incurred in connection with the handling of advertising. They are made most often by dishonest publishers using special software (bots) to generate profits. Bots are also used in scraping, which is automatic scanning and downloading of website content, which actually is not in the interest of website authors. The model proposed in this work is learnt by data extracted directly from the web browser during website visits. This data is acquired by using a specially prepared JavaScript that monitors the behavior of the user or bot. The appearance of a bot on a website generates parameter values that are significantly different from those collected during typical visits made by human website users. It is not possible to learn more about the software controlling the bots and to know all the data generated by them. Therefore, this paper proposes a variational autoencoder (VAE) neural network model with modifications to detect the occurrence of abnormal parameter values that deviate from data obtained from human users’ Internet traffic. The algorithm works on the basis of a popular autoencoder method for detecting anomalies, however, a number of original improvements have been implemented. In the study we used authentic data extracted from several large online stores.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2022, 12, 4; 255--266
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ciało „nienormalne”. O roli anomalii w rozwoju nauk biologicznych
“Non-Normal Body.” On the Role of Anomaly in the Development of Biological Sciences
Autorzy:
Leśniewska, Małgorzata
Leśniewski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/31343584.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Filozofii i Socjologii PAN
Tematy:
anomalia
ewolucja
rozwój
evo-devo
anomaly
evolution
development
Opis:
W ostatnich latach odkryto szereg anomalii u osobników gatunku Haplophilus subterraneus (Shaw, 1789) w gromadzie Chilopoda. Ten szczególny przypadek ciała zdeformowanego prowokuje do ponownego odczytania historii i kształtowania się postaw kulturowych wobec ciał obarczonych anomaliami. W artykule prezentujemy zmiany postrzegania, postaw oraz interpretacji form anomalnych od zdziwienia czy przerażenia aż po odczytanie, które umożliwiło olbrzymi postęp w nauce i wyjaśnieniu wielu elementów procesu rozwoju organizmów oraz ich ewolucji.
In recent years a number of anomalies in specimens of the species Haplophilus subterraneus (Shaw, 1789) in the class Chilopoda were discovered. This particular case of the deformed body provokes to reinterpretation of the history and evolution of cultural attitudes towards the body affected by malformations. In this paper we present changes of perceptions, attitudes and interpretations of anomalous forms— from surprise or horror to an interpretation which results in a great progress in science and in explanations of many elements of developmental processes and evolution of organisms.
Źródło:
Filozofia i Nauka; 2017, 5; 49-60
2300-4711
2545-1936
Pojawia się w:
Filozofia i Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Representativeness analysis and possible applications of partial network data flows
Autorzy:
Bolanowski, M.
Paszkiewicz, A.
Wroński, M.
Żegleń, R.
Powiązania:
https://bibliotekanauki.pl/articles/114308.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
link aggregation control protocol
network security
network anomaly detection
Opis:
A new approach to statistical analysis of network flows and its possible application to statistical anomaly detection in high bandwidth communication networks are presented in the paper. The whole data stream was divided into smaller flows using Link Aggregation Control Protocol (LACP). A statistical analysis of the resulting flows shows that a single stream separated from the overall network traffic is representative when it comes to statistical anomaly detection. Such an approach allows the reduction of hardware resources needed to detect anomalies, and makes such a detection possible in high traffic communication systems.
Źródło:
Measurement Automation Monitoring; 2016, 62, 1; 29-32
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Architecture of maritime awareness system supplied with external information
Autorzy:
Stróżyna, M.
Małyszko, J.
Węcel, K.
Filipiak, D.
Abramowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/320420.pdf
Data publikacji:
2016
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
maritime awareness
AIS
data fusion
information extraction
anomaly detection
Opis:
In this paper, we discuss a software architecture, which has been developed for the needs of the System for Intelligent Maritime Monitoring (SIMMO). The system bases on the state-of-the-art information fusion and intelligence analysis techniques, which generates an enhanced Recognized Maritime Picture and thus supports situation analysis and decision-making. The SIMMO system aims to automatically fuse an up-to-date maritime data from Automatic Identification System (AIS) and open Internet sources. Based on collected data, data analysis is performed to detect suspicious vessels. Functionality of the system is realized in a number of different modules (web crawlers, data fusion, anomaly detection, visualization modules) that share the AIS and external data stored in the system’s database. The aim of this article is to demonstrate how external information can be leveraged in maritime awareness system and what software solutions are necessary. A working system is presented as a proof of concept.
Prezentowany artykuł omawia architekturę oprogramowania opracowanego na potrzeby projektu System for Intelligent Maritime Monitoring (SIMMO). System ten bazuje na najnowszych osiągnięciach w dziedzinach fuzji oraz inteligentnej analizy danych w celu generowania wzbogaconego obrazu sytuacji na morzu i wspomagania decyzji. SIMMO w sposób automatyczny łączy dane dotyczące ruchu morskiego z systemu AIS z danymi pochodzącymi z otwartych źródeł internetowych. Dzięki zebranym danym możliwa jest analiza w celu wykrycia podejrzanych zachowań na morzu. Funkcjonalność systemu stanowi wypadkową zawartych w nim modułów (ekstrakcja danych, fuzja danych, detekcja anomalii, wizualizacja) współdzielących dostęp do baz z danymi AIS oraz z zewnętrznych źródeł. Celem artykułu jest demonstracja sposobu wykorzystywania zewnętrznych informacji w systemach przeznaczonych do monitorowania ruchu morskiego, a także prezentacja działającego systemu.
Źródło:
Annual of Navigation; 2016, 23; 135-149
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crowdsourced Driving Comfort Monitoring
Autorzy:
Badurowicz, Marcin
Montusiewicz, Jerzy
Przyłucki, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/2023307.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
accelerometer
anomaly detection
roads quality
road artefacts
quality monitoring
Opis:
In this paper, the authors are showing a calculation of the road quality index called Simple Road Quality Index (SRQI) using the weight provided by the amateur drivers to best possibly rate their comfort on driving on that road. The index is calculated from acceleration data acquired by the smartphone application and is aggregated in a crowdsourcing system for the classification of road quality using the fuzzy membership function. The paper shows that the proposed index correctly shows road quality changes over time and may be used as a way to mark roads to be avoided or needs to be repaired. The numerical experiment was based on the same street in Lublin, Poland, in 2015-2021 and is correctly showing that the quality of analyzed roads deteriorated over time, especially in the winter season.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 309-317
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An anomaly within the genital system in a female Ascaris suum Goeze
Autorzy:
Templin, J.
Napiorkowska, T.
Szczepanik, M.
Powiązania:
https://bibliotekanauki.pl/articles/6272.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
anomaly
genital system
female
reproductive system
Ascaris suum
endoparasite
Źródło:
Annals of Parasitology; 2012, 58, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
VoIP Anomaly Detection - selected methods of statistical analysis
Autorzy:
Dymora, P.
Mazurek, M.
Jaskółka, S.
Powiązania:
https://bibliotekanauki.pl/articles/106150.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Hurst factor
anomaly detection
self-similarity
long-range dependence
Opis:
Self-similarity analysis and anomaly detection in networks are interesting fields of research and scientific work of scientists around the world. Simulation studies have demonstrated that the Hurst parameter estimation can be used to detect traffic anomaly. The actual network traffic is self-similar or long-range dependent. The dramatic expansion of applications on modern networks gives rise to a fundamental challenge to network security. The Hurst values are compared with confidence intervals of normal values to detect anomaly in VoIP.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2016, 16, 2; 14-19
1732-1360
2083-3628
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carapace anomalies of pond turtles (Emys orbicularis) from the Poleski National Park, from the hatch of 2008
Anomalie karapaksu żółwi błotnych (Emys orbicularis) z Poleskiego Parku Narodowego z lęgu 2008 roku
Autorzy:
Kosik, E.
Wójcik, M.
Beeger, S.
Rozempolska-Rucińska, I.
Powiązania:
https://bibliotekanauki.pl/articles/2196894.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
carapace anomaly
pond turtle
Emys orbicularis
Polesie National Park
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2013, 31, 1; 34-42
0239-4243
2083-7399
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double Layered Priority based Gray Wolf Algorithm (PrGWO-SK) for safety management in IoT network through anomaly detection
Autorzy:
Agrawal, Akhileshwar Prasad
Singh, Nanhay
Powiązania:
https://bibliotekanauki.pl/articles/2200943.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
Gray Wolf Optimizer
anomaly detection
feature selection
predictive maintenance
Opis:
For mitigating and managing risk failures due to Internet of Things (IoT) attacks, many Machine Learning (ML) and Deep Learning (DL) solutions have been used to detect attacks but mostly suffer from the problem of high dimensionality. The problem is even more acute for resource starved IoT nodes to work with high dimension data. Motivated by this problem, in the present work a priority based Gray Wolf Optimizer is proposed for effectively reducing the input feature vector of the dataset. At each iteration all the wolves leverage the relative importance of their leader wolves’ position vector for updating their own positions. Also, a new inclusive fitness function is hereby proposed which incorporates all the important quality metrics along with the accuracy measure. In a first, SVM is used to initialize the proposed PrGWO population and kNN is used as the fitness wrapper technique. The proposed approach is tested on NSL-KDD, DS2OS and BoTIoT datasets and the best accuracies are found to be 99.60%, 99.71% and 99.97% with number of features as 12,6 and 9 respectively which are better than most of the existing algorithms.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 4; 641--654
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of machining centre sliding system fault detection using torque signals and autoencoder
Autorzy:
Augustyn, Damian
Fidali, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2233649.pdf
Data publikacji:
2023
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
condition monitoring
torque signal
machining centre
anomaly detection
autoencoder
Opis:
The sliding system of machining centres often causes maintenance and process problems. Improper operation of the sliding system can result from wear of mechanical parts and drives faults. To detect the faulty operation of the sliding system, measurements of the torque of its servomotors can be used. Servomotor controllers can measure motor current, which can be used to calculate motor torque. For research purposes, the authors used a set of torque signals from the machining centre servomotors that were acquired over a long period. The signals were collected during a diagnostic test programmed in the machining centre controller and performed once per day. In this article, a method for detecting anomalies in torque signals was presented for the condition assessment of the machining centre sliding systems. During the research, an autoencoder was used to detect the anomaly, and the condition was assessed based on the value of the reconstruction error. The results indicate that the anomaly detection method using an autoencoder is an effective solution for detecting damage to the sliding system and can be easily used in a condition monitoring system.
Źródło:
Acta Mechanica et Automatica; 2023, 17, 3; 445--451
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Offline-online pattern recognition for enabling time series anomaly detection on older NC machine tools
Autorzy:
Netzer, Markus
Palenga, Yannic
Goennheimer, Philipp
Fleischer, Juergen
Powiązania:
https://bibliotekanauki.pl/articles/1428705.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
data provision
anomaly detection
machine learning
manufacturing
condition monitoring
Opis:
Intelligent IoT functions for increased availability, productivity and component quality offer significant added value to the industry. Unfortunately, many old machines and systems are characterized by insufficient, inconsistent IoT connectivity and heterogeneous parameter naming. Furthermore, the data is only available in unstructured form. In the following, a new approach for standardizing information models from existing plants with machine learning methods is described and an offline-online pattern recognition system for enabling anomaly detection under varying machine conditions is introduced. The system can enable the local calculation of signal thresholds that allow more granular anomaly detection than using only single indexing and aims to improve the detection of anomalous machine behaviour especially in finish machining.
Źródło:
Journal of Machine Engineering; 2021, 21, 1; 98-108
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ADDP : Anomaly Detection Based on Denoising Pretraining
Autorzy:
Ge, Xianlei
Li, Xiaoyan
Zhang, Zhipeng
Powiązania:
https://bibliotekanauki.pl/articles/27311945.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Anomaly Detection
Diffusion Models
image denoising
Pretraining
transfer learning
Opis:
Acquiring labels in anomaly detection tasks is expensive and challenging. Therefore, as an effective way to improve efficiency, pretraining is widely used in anomaly detection models， which enriches the model's representation capabilities, thereby enhancing both performance and efficiency in anomaly detection. In most pretraining methods, the decoder is typically randomly initialized. Drawing inspiration from the diffusion model, this paper proposed to use denoising as a task to pretrain the decoder in anomaly detection, which is trained to reconstruct the original noise-free input. Denoising requires the model to learn the structure, patterns, and related features of the data, particularly when training samples are limited. This paper explored two approaches on anomaly detection: simultaneous denoising pretraining for encoder and decoder, denoising pretraining for only decoder. Experimental results demonstrate the effectiveness of this method on improving model’s performance. Particularly, when the number of samples is limited, the improvement is more pronounced.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 4; 719--726
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The weathering-modified iridium record of a new Cretaceous–Palaeogene site at Lechowka near Chelm, SE Poland, and its palaeobiologic implications
Autorzy:
Racki, G.
Michalski, M.
Koeberl, C.
Harasimiuk, M.
Powiązania:
https://bibliotekanauki.pl/articles/20009.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Cretaceous
geochemical anomaly
Lechowka n.Chelm
Paleogene
Polska
anomaly
biostratigraphy
extinction
geochemistry
geological setting
iridium
lithology
paleobiology
paleontology
weathering-modified iridium
Opis:
In the light of integrated biostratigraphic and geochemical data, a complete shallow−marine succession across the Cretaceous–Palaeogene (K–Pg) boundary, with the critical boundary clay coupled with a burrowed siliceous chalk (“opoka” in Polish geological literature), possibly equivalent of the basal Danian Cerithium Limestone in Denmark, has been discovered at Lechówka near Chełm, SE Poland. An extraterrestrial signature marking the K–Pg boundary is confirmed by anomalously high amounts of iridium (up to 9.8 ppb) and other siderophile elements (especially Au and Ni), as well as by an elevated Ir/Au ratio consistent with a chondrite meteoritic composition. The major positive iridium spike surprisingly occurs in Maastrichtian marls, 10 cm below the boundary clay interval, which can be explained by diagenetic mobilisation and re−concentration of the impact−derived components. Thus, intensively infiltrating, humic acid−rich ground waters during the long−lasting Palaeogene weathering in tropical humid regimes were probably responsible not only for the large−scale decalcification of the Lechówka section, but also for both downward displaced position of the iridium enrichment, a dispersed profile of this anomaly and its significantly lessened value, but still approaching an increase by a factor of 100. This modified record of the K–Pg boundary event points to a careful reconsideration of the iridium anomaly as a trustworthy marker for studying the extinction patterns across the K–Pg boundary, as supported by the recent data from New Jersey, USA.
Źródło:
Acta Palaeontologica Polonica; 2011, 56, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Congenitally Missing Teeth – A Developmental Anomaly
Autorzy:
Vijayendranath, Nayak S.
Gunasheela, S.
Powiązania:
https://bibliotekanauki.pl/articles/1066312.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Congenital
Dental Agenesis
Developmental Anomaly
Esthetics
Maxillary Lateral Incisors
Opis:
Teeth plays a major role in esthetics and functioning of the oral cavity. Missing teeth can cause disharmony in functioning and esthetic value of an individual. Third molars are the most common teeth which goes missing without even formation of tooth bud. Here we report a case of congenitally missing maxillary lateral incisor with no known cause for the same.
Źródło:
World Scientific News; 2019, 130; 305-308
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anomaly detection in server metrics with use of one-sided median algorithm
Autorzy:
Zacher, S.
Ryba, P.
Powiązania:
https://bibliotekanauki.pl/articles/972918.pdf
Data publikacji:
2017
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
anomaly detection
time series
one-sided median
server metrics
Opis:
In this paper we consider the problem of anomaly detection over time series metrics data took from one of corporate grade mail service cluster. We propose the algorithm based on one-sided median concept and present some results of experiments showing impact of parameters settings on algorithm performance. In addition we present short description of classes of anomalies discovered in monitored system. Proposed one-sided median based algorithm shows great robustness and good detection rate and can be considered as possible simple production ready solution.
Źródło:
Journal of Applied Computer Science Methods; 2017, 9 No. 1; 5-22
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anomalies detection in computer networks with the use of SDN
Autorzy:
Bolanowski, M.
Twaróg, B.
Mlicki, R.
Powiązania:
https://bibliotekanauki.pl/articles/114222.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
anomaly detection
statistical signature
computer network
software defined network
Opis:
: In the paper, the authors present a method of anomalies detection and identification in network traffic using statistical signatures. There is also shown a new system architecture based on the Software-Defined Networking (SDN) which allows for application of statistical anomaly detection in computer networks. With the proposed hardware-software model, it becomes possible to implement custom algorithms for the threats detection with the use of recognized and secure communications standards. The proposed architecture has been built based on an open-source solutions and can be used directly in production environments.
Źródło:
Measurement Automation Monitoring; 2015, 61, 9; 443-445
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Komunikačně-stylový a systémový pohyb v současné češtině
Communication styles and system movement in contemporary Czech
Autorzy:
Čechová, Marie
Powiązania:
https://bibliotekanauki.pl/articles/1920447.pdf
Data publikacji:
2020-12-20
Wydawca:
Uniwersytet Opolski
Tematy:
communication
normative
analogy
anomaly
codification
archaization
revitalization
convergence
differentiation
Opis:
The Czech language is socially stratified and regionally differentiated, although there are also processes of the opposite character going on in it, like unification and equalization. Language development includes in itself antinomies opposing each other, but which are mutually complementary and converting into each other. The paper presents an interpretation of the functioning of selected antinomies in the language and in speech, such as the relationship between the standard and non-standard forms, represented by the common Czech. As early as in the middle of the last century the tendency to blurring of boundaries between them occurred, while various linguists have had different opinions on that process. These opinions are reflected in inconsistencies present in normative books (dictionaries, grammars, orthographic norms, normative educational handbooks), and this raises the uncertainty of users in the choice of language means. The users are now perhaps more influenced by the media than by teaching. The level of media speech is reflected in the speech of ordinary users, the frequent phenomena being overused, they become fashion, they insinuate themselves into the speech regardless of their functionality or non-functionality. In general, the current situation of the Czech can be characterized as dynamic, with developmental features, both systemic and irregular. Linguistics should not only capture this situation and describe it, but influence it by linguistic awareness, as the followers of the Prague School claimed. However, some linguists refuse it, considering it wrongly as intervention and manipulation.
Źródło:
Stylistyka; 2020, 29; 427-439
1230-2287
2545-1669
Pojawia się w:
Stylistyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the Complex Event Processing system for anomaly detection and network monitoring
Autorzy:
Frankowski, G.
Jerzak, M.
Miłostan, M.
Nowak, T.
Pawłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/305323.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
network monitoring
intrusion detection
anomaly detection
complex event processing
Opis:
Protection of infrastructures for e-science, including grid environments and NREN facilities, requires the use of novel techniques for anomaly detection and network monitoring. The aim is to raise situational awareness and provide early warning capabilities. The main operational problem that most network operators face is integrating and processing data from multiple sensors and systems placed at critical points of the infrastructure. From a scientific point of view, there is a need for the efficient analysis of large data volumes and automatic reasoning while minimizing detection errors. In this article, we describe two approaches to Complex Event Processing used for network monitoring and anomaly detection and introduce the ongoing SECOR project (Sensor Data Correlation Engine for Attack Detection and Support of Decision Process), supported by examples and test results. The aim is to develop methodology that allows for the construction of next-generation IDS systems with artificial intelligence, capable of performing signature-less intrusion detection.
Źródło:
Computer Science; 2015, 16 (4); 351-371
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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