Search results for " class"
showing 10 items of 3720 documents
Usytuowanie ustrojowo-polityczne ochrony informacji niejawnych w Polsce, Czechach i na Słowacji
2022
Za system ochrony informacji niejawnych w Polsce odpowiadają służby specjalne. W Czechach i na Słowacji do prowadzenia działań w tym zakresie powołano centralne urzędy cywilne działające poza systemem służb specjalnych. Instytucje zajmujące się ochroną informacji niejawnych w polskim systemie ustrojowym i konstytucyjnym są nadzorowane głównie przez władzę wykonawczą — premiera, podczas gdy w Czechach i na Słowacji głównym czynnikiem kontrolnym w systemie są specjalne komisje parlamentarne. Ochronę praw osób, których dane są przetwarzane w ramach różnego rodzaju postępowań prowadzonych przez takie organy, gwarantują we wszystkich analizowanych systemach politycznych sądy. Na Słowacji jest to…
Generalizability and Simplicity as Criteria in Feature Selection: Application to Mood Classification in Music
2011
Classification of musical audio signals according to expressed mood or emotion has evident applications to content-based music retrieval in large databases. Wrapper selection is a dimension reduction method that has been proposed for improving classification performance. However, the technique is prone to lead to overfitting of the training data, which decreases the generalizability of the obtained results. We claim that previous attempts to apply wrapper selection in the field of music information retrieval (MIR) have led to disputable conclusions about the used methods due to inadequate analysis frameworks, indicative of overfitting, and biased results. This paper presents a framework bas…
Adaptive framework for network traffic classification using dimensionality reduction and clustering
2012
Information security has become a very important topic especially during the last years. Web services are becoming more complex and dynamic. This offers new possibilities for attackers to exploit vulnerabilities by inputting malicious queries or code. However, these attack attempts are often recorded in server logs. Analyzing these logs could be a way to detect intrusions either periodically or in real time. We propose a framework that preprocesses and analyzes these log files. HTTP queries are transformed to numerical matrices using n-gram analysis. The dimensionality of these matrices is reduced using principal component analysis and diffusion map methodology. Abnormal log lines can then …
User session level diverse reranking of search results
2018
Most Web search diversity approaches can be categorized as Document Level Diversification (DocLD), Topic Level Diversification (TopicLD) or Term Level Diversification (TermLD). DocLD selects the relevant documents with minimal content overlap to each other. It does not take the coverage of query subtopics into account. TopicLD solves this by modeling query subtopics explicitly. However, the automatic mining of query subtopics is difficult. TermLD tries to cover as many query topic terms as possible, which reduces the task of finding a query's subtopics into finding a set of representative topic terms. In this paper, we propose a novel User Session Level Diversification (UserLD) approach bas…
Functional inequalities for generalized inverse trigonometric and hyperbolic functions
2014
Various miscellaneous functional inequalities are deduced for the so-called generalized inverse trigonometric and hyperbolic functions. For instance, functional inequalities for sums, difference and quotient of generalized inverse trigonometric and hyperbolic functions are given, as well as some Gr\"unbaum inequalities with the aid of the classical Bernoulli inequality. Moreover, by means of certain already derived bounds, bilateral bounding inequalities are obtained for the generalized hypergeometric ${}_3F_2$ Clausen function.
An Approach for Network Outage Detection from Drive-Testing Databases
2012
A data-mining framework for analyzing a cellular network drive testing database is described in this paper. The presented method is designed to detect sleeping base stations, network outage, and change of the dominance areas in a cognitive and self-organizing manner. The essence of the method is to find similarities between periodical network measurements and previously known outage data. For this purpose, diffusion maps dimensionality reduction and nearest neighbor data classification methods are utilized. The method is cognitive because it requires training data for the outage detection. In addition, the method is autonomous because it uses minimization of drive testing (MDT) functionalit…
Coupling high-resolution satellite imagery with ALS-based canopy height model and digital elevation model in object-based boreal forest habitat type …
2014
We developed a classification workflow for boreal forest habitat type mapping. In object-based image analysis framework, Fractal Net Evolution Approach segmentation was combined with random forest classification. High-resolution WorldView-2 imagery was coupled with ALS based canopy height model and digital terrain model. We calculated several features (e.g. spectral, textural and topographic) per image object from the used datasets. We tested different feature set alternatives; a classification accuracy of 78.0 % was obtained when all features were used. The highest classification accuracy (79.1 %) was obtained when the amount of features was reduced from the initial 328 to the 100 most imp…
Yrittäjätaiteilijat vapauden, luovuuden ja toimeentulon rajapinnoilla
2021
Keskitymme artikkelissamme nuorten (alle 35-vuotiaiden), taiteilijoina toimivien yrittäjien ja freelancereiden näkemyksiin omasta työstään, työolosuhteistaan ja tuloistaan. Aineistonamme on Kulttuuripolitiikan edistämissäätiön ja Taiteen edistämiskeskuksen keräämä Nuoret taiteentekijät ‑kyselyaineisto vuodelta 2018 (n = 565). Erotimme aineistosta artikkelimme otokseksi yrittäjien ja freelancereiden (n = 209) edellä mainittuja asioita koskevat vastaukset. Käytämme heistä yhteisnimitystä yrittäjätaiteilijat. Tutkimme eri tekijöiden vaikutuksia yrittäjätaiteilijoiden työtyytyväisyyteen suorien jakaumien sekä ristiintaulukointien ja niitä koskevien riippumattomuustestien ja korrelaatiokertoimie…
Ekologinen kriisi ja työ
2019
Kirja-arvio: Antti Kasvio: Kestävä työ ja hyvä elämä. Helsinki. Gaudeamus. 2014. 262 s. nonPeerReviewed