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1

Feature selection for classification in Steady state visually evoked potentials (SSVEP)-based brain-computer interfaces with genetic algorithm

Karkosz Stanisław, Jukiewicz Marcin

Bio-Algorithms and Med-Systems

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2020

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Vol. 16, no. 2

art. no. 20200013

EN

Objectives: Optimization of Brain-Computer Interface by detecting the minimal number of morphological features of signal that maximize accuracy. Methods: System of signal processing and morphological features extractor was designed, then the genetic algorithm was used to select such characteristics that maximize the accuracy of the signal’s frequency recognition in offline Brain-Computer Interface (BCI). Results: The designed system provides higher accuracy results than a previously developed system that uses the same preprocessing methods, however, different results were achieved for various subjects. Conclusions: It is possible to enhance the previously developed BCI by combining it with morphological features extraction, however, it’s performance is dependent on subject variability.

2

Effect of despeckle filtering on classification of breast tumors using ultrasound images

Kriti, Virmani Jitendra, Agarwal Ravinder

Biocybernetics and Biomedical Engineering

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2019

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Vol. 39, no. 2

536--560

EN

Ultrasound is the most widely used imaging modality for screening of breast tumors. However, due to the presence of speckle noise in an ultrasound image, the diagnostic information gets masked and the interpretation of the breast abnormalities becomes difficult for the radiologist. The texture of the tumor region and the shape/margin characteristics are considered to be important parameters for the analysis of the breast tumors. In the present work, exhaustive experimentation has been carried out for the design of CAD systems for classification of breast tumors by considering (a) original images only, (b) despeckled images only and (c) both original and despeckled images together (hybrid approach). Total 100 breast ultrasound images (40 benign and 60 malignant) have been used for the analysis. Initially, these images have been despeckled using six filters namely Lee sigma, BayesShrink, DPAD, FI, FB and HFB filters. Total 162 features (149 texture and 13 morphological features) have been computed from both original and despeckled breast ultrasound images and SVM classifier has been used extensively for the classification. The results of the study indicate that the hybrid approach of CAD system design using texture features computed from original images combined with morphological features computed from images despeckled by DPAD filter yield optimal performance for classifica-tion of benign and malignant breast tumors with a classification accuracy of 96.0%. From the promising results of the study it can be concluded that the proposed hybrid CAD system design could be used as a second opinion tool in clinical setting.

3

Does the genetic variability of Phragmites australis (Cav.) Trin. ex Steud determine the spatial distribution of the species?

Świerk D., Krzyżaniak M., Kosiada T., Urbański P., Behnke-Borowczyk J.

Oceanological and Hydrobiological Studies

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2018

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Vol. 47, No. 4

405--414

EN

This paper is an attempt to answer the question whether common reed specimens growing in a particular habitat are genetically related. We have tried to identify groups of plants homogeneous in terms of habitat requirements and genetic similarity. Our objective was also to answer the question whether habitat conditions can affect the morphological characteristics of plants. Plants and bottom sediments were collected from 40 sites in central Poland, which differ in soil moisture and the degree of urbanization. Our research and analysis confirm the hypothesis to a certain extent. During the study, we identified three groups of plants homogeneous in terms of habitat and genetic factors (CVA model), which constitute 20% of all examined plants. In our opinion, further research is required on a larger population of P. australis in a larger area. The research revealed that plants growing in moist and wet areas were characterized by higher content of chlorophyll in leaves, longer stems as well as thicker and wider laminae. The common reed plants preferred anthropogenic substrates, which did not contain many nutrients, but were abundant in calcium. Our study confirmed the high tolerance of P. australis to soil salinity.

4

Assessment of the usefulness of new winter wheat varieties (Triticum aestivum L.) for cultivation in organic farming

Feledyn-Szewczyk B., Jończyk K., Stalenga J.

Journal of Research and Applications in Agricultural Engineering

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2018

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Vol. 63, nr 2

43--49

EN

The objective of the research was to establish the ranking of the usefulness of winter wheat varieties (Triticum aestivum L.) for cultivation in organic farming, taking into account their competitive ability against weeds, leaf infestation by fungal pathogens and yielding. The study was conducted in the period 2014-2016 in 3 locations in Poland: Experimental Stations of The Institute of Soil Science and Plant Cultivation – State Research Institute in Osiny (Lublin province) and Chwałowice (Masovian province) and private organic farm in Chomentowo (Podlasie province). Twelve winter wheat varieties were sown in a randomized complete block design with four replications. Weed density and their dry matter as well as biometric features of wheat varieties influenced the competitive ability against weeds, such as the height, number of tillers, wheat plant density and dry matter of wheat were assessed at a dough stage. Leaves were scored for infestation rate with fungal pathogens at milky-dough stage. Grain yield and thousand grain weight were estimated after wheat harvest. The results showed that different morphological features and canopy parameters influenced the competitive abilities of the winter wheat varieties tested. A set of varieties with the largest competitive ability and the highest yield: Julius, Skagen, Sailor, Jantarka, Smuga was established as the most suitable for organic agriculture. Muszelka, Banderola, Bamberka and KWS Ozon were characterized by the smallest competitive abilities against weeds. Arkadia, Ostroga and spelt Rokosz were the lowest yielders. For Arkadia variety leaf infestation by pathogens was a factor that limited the yield.

PL

Celem badań była ocena przydatności odmian pszenicy ozimej (Triticum aestivum L.) do uprawy w systemie ekologicznym biorąc pod uwagę ich zdolności konkurencyjne w stosunku do chwastów, podatność na choroby grzybowe i plonowanie. Badania przeprowadzono w latach 2014-2016 w trzech lokalizacjach w Polsce: w Rolniczym Zakładzie Doświadczalnym Instytutu Uprawy Nawożenia i Gleboznawstwa – Państwowego Instytutu Badawczego w Osinach (woj. lubelskie) i Chwałowicach (woj. mazowieckie) oraz w indywidualnym gospodarstwie ekologicznym w Chomentowie (woj. podlaskie). Dwanaście odmian pszenicy ozimej wysiewano w układzie całkowitej randomizacji w 4 powtórzeniach. Liczebność chwastów i ich sucha masa, jak również cechy biometryczne odmian pszenicy ozimej wpływające na konkurencyjność w stosunku do chwastów: wysokość, rozkrzewienie, obsada roślin i sucha masa części nadziemnych łanu były oceniane w fazie dojrzałości. Plon ziarna i masa tysiąca nasion były określane po zbiorze pszenicy. Wyniki wykazały, że różne cechy morfologiczne i parametry łanu wpływały na zdolności konkurencyjne testowanych odmian pszenicy ozimej w stosunku do chwastów. Wyróżniono grupę odmian o największej konkurencyjności i plonach: Julius, Skagen, Sailor, Jantarka, Smuga, najbardziej przydatne dla rolnictwa ekologicznego. Odmiany Muszelka, Banderola, Bamberka i KWS Ozon cechowały się najmniejszymi zdolnościami konkurencyjnymi w stosunku do chwastów. Odmiany Arkadia, Ostroga i orkisz Rokosz plonowały na najniższym poziomie. Przyczyną niskich plonów odmiany Arkadia było porażenie liści przez patogeny grzybowe.

5

Ocena jakości morfologicznej i kulinarnej bulw ziemniaka jadalnego pochodzącego z regionu środkowo-wschodniej Polski

Zarzecka K., Gugała M., Mystkowska I., Zarzecka M.

Proceedings of ECOpole

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2014

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Vol. 8, No. 1

326--330

PL

W pracy przedstawiono wyniki badań dotyczące wybranych cech morfologicznych (procentowy udział bulw jadalnych, regularność kształtu bulw, wygląd skórki) i kulinarnych (ciemnienie miąższu bulw surowych i ugotowanych, typ kulinarno-użytkowy) bulw ziemniaka pochodzącego z sieci handlowej środkowo-wschodniej Polski. Lepszymi cechami morfologicznymi i mniejszym ciemnieniem miąższu bulw surowych odznaczały się bulwy pochodzące z supermarketów niż ze sklepów spożywczych i owocowo-warzywnych. Bulwy spełniały podstawowe wymagania jakości konsumpcyjnej ziemniaka jadalnego.

EN

The paper presents the results of a study carried out to examine selected morphological (percentage share of tubers suitable for consumption, regularity of tuber shape, skin appearance) and cooking (raw flesh darkening, after-cooking darkening, cooking type) characteristics of potato tubers offered for sale in retail outlets in central-eastern Poland. Tubers purchased in supermarkets had better morphological characteristics and flesh which darkened less when raw, compared with grocery shops or fruit and vegetable crops. The tubers met basic requirements set for edible potato.

6

Analiza porównawcza wybranych cech motorycznych i morfologicznych podchorążych IV roku WSOSP oraz absolwentów wyższych uczelni będących na kursie oficerskim

Czapla K.

Zeszyty Naukowe / Wyższa Szkoła Oficerska Sił Powietrznych

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2013

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Nr 1

33--40

PL

Celem autora artykułu było porównanie cech morfologicznych i sprawności fizycznej podchorążych IV roku oraz absolwentów wyższych uczelni cywilnych. Biorąc pod uwagę specyfikę szkolenia podchorążych w WSOSP przez cały okres studiów, dokonano porównania sprawności fizycznej pomiędzy podchorążymi a studentami wyższych uczelni w połączeniu z cechami somatycznymi.

EN

The aim of this article is to compare morphological features and physical fitness of the fourth year cadets and graduates of civilian universities. Taking into consideration the character of the training offered to cadets throughout their study period, their fitness and that of civilian universities graduates have been compared, in conjunction with their somatic features.

7

Phenotypic variation in relation to seed storage protein polymorphism in Bromus secalinus L. (Gramineae) populations from North-Eastern Poland

Skrajna T., Kubicka H., Rzymowska Z.

Polish Journal of Ecology

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2012

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Vol. 60, nr 1

41-55

EN

Bromus secalinus L. is an annual speirochoric species growing in agrocenoses of winter crops. In the past, B. secalinus L. could be found throughout Poland. The regression of the species has caused it to be classified as a rare species threatened with extinction. The study was conducted in the 2007-2010 time period, in north-eastern Poland where a considerable increase in the number of sites and abundance of B. secalinus were observed. The plant material was collected from agrocenoses of winter crops, at 14 sites representing the habitat diversity of the species occurrence. Eight morphological features were taken into account when evaluating populations of B. secalinus. The morphological diversity of the populations of B. secalinus was correlated with different habitat conditions (type, pH of soil and cultivated plant). The populations growing on the sites with optimum trophic and moisture conditions as well as those populations growing in very poor conditions were found to differ the most. A comparison of B. secalinus was done and six groups of cluster similarities were found using the agglomeration method Electrophoretic analysis of seed storage proteins of B. secalinus L from the studied populations were performed using SDS-PAGE. Analysis revealed relatively high genetic polymorphism irrespective of whether genetic variation was compared between the populations from different sites or between the subpopulations from only site number 4. Three homologenous groups were formed which were related to the cultivated plant coverage, and partially, to the type of soil. In the investigated populations and subpopulations, protein bands of molecular weight from 8 to 68 kDa were observed. The SDS-PAGE method was found suitable for the assessment of genetic variation in populations of B. secalinus L from many sites as well as within the subpopulations from one site.

8

Cechy morfologiczne źdźbeł różnych odmian jęczmienia nagoziarnistego warunkujące odporność na wyleganie

Sadowska U.

Inżynieria Rolnicza

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2009

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R. 13, nr 6

223-228

PL

W pracy przedstawiono wyniki badań, których celem była ocena zmienności analizowanych cech morfologicznych źdźbeł starych odmian jęczmienia nagiego (orkiszy), mających wpływ na wyleganie roślin, oraz wstępne wyodrębnienie genotypów o pożądanych cechach, które mogłyby być wykorzystane w pracach hodowlanych. Na podstawie przeprowadzonych badań stwierdzono najsilniejszą zależność wylegania od długości dolnych międzywęźli. Nietypowa okazała się czterorzędowa odmiana P7, która mimo ciężkich kłosów i długim pierwszym międzywęźlu odznaczała się przeciętną podatnością na wyleganie, jednocześnie największą średnicą zewnętrzną źdźbła. Wyodrębniono 7 odmian odznaczających się niewielką podatnością na wyleganie, oraz wysoką masą kłosa.

EN

The paper presents results of the research aimed to assess variability of analysed morphological features of stalks belonging to old gymnosperm barley varieties (spelts) that affect plant lodging, and preliminary separation of genotypes with desired characteristics which could be used in breeding operations. Completed research confirmed strongest dependence between lodging and length of lower interstitial sites. The P7 four-row variety proved to be untypical - in spite of heavy ears and long first interstitial site it was characterised by average susceptibility to lodging, and at the same time highest stalk outside diameter. The researchers separated 7 varieties characterised by low susceptibility to lodging and high ear mass.

9

Wpływ siedliska na zmienność cech morfologicznych bulw ziemniaka

Krzysztofik B., Szecówka P., Nawara P.

Inżynieria Rolnicza

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2005

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R. 9, nr 10

219--225

PL

Przeprowadzone badania dotyczyły wpływu czynników glebowych i odmiany na zmiany cech morfologiczne oraz współczynników kształtu bulw ziemniaka. Badano trzy odmiany ziemniaka, które uprawiano na trzech różnych typach glob oraz nawożono czterema różnymi nawozami plus kontrola (poletko bez nawożenia). Uzyskane wyniki wskazują, że na badane cechy morfologiczne wpływały: odmiana i gleba, natomiast nawożenie nie wpływały na współczynnik przekroju poprzecznego (K2) i współczynnik niezmienności wymiarów (K7).

EN

The research was devoted to the influence of soil factors and potato varieties on the morphological features and shape factors of potato tubes. Three potato varieties growed on three different types of soil and fertilized with four different fertilizes and control (without fertilization) were considered. Obtained results suggested that morphological features in consideration were influenced by variety and soil type. On the other hand fertilization did not influenced coefficient of transverse section (K2) and the coefficient of invariability of dimensions (K7).