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Tytuł:
Effect of selected preparations on some biometric features of Tardiva’ panicled hydrangea (Hydrangea paniculata Siebold) depending on the irrigation frequency
Autorzy:
Durlak, W.
Marcinek, B.
Szmagara, M.
Dudkiewicz, M.
Konopińska-Mamej, A.
Tematy:
plant cultivation
panicle hydrangea
Hydrangea paniculata
Tardiva cultivar
ornamental plant
flowering plant
biometric feature
irrigation frequency
Pokaż więcej
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:
https://bibliotekanauki.pl/articles/12298905.pdf  Link otwiera się w nowym oknie
Opis:
One of the ways to reduce the water consumption by plants while maintaining their proper quality is to use substances that limit excessive transpiration. Three preparations at following concentrations: Moisturin (10%), Root-Zone (4.5%) and Vapor Gard (1%), were used in the experiment. Moisturin and Vapor Gard were applied in the form of a single spray, and Root-Zone as a single irrigation in mid July.The aim of the research was to assess the effect of several anti-transpirants on some biometric features of the ‘Tardiva’ panicled hydrangea depending on the frequency of irrigation. The following parameters were measured: area, perimeter, width and length of leaf blade, length and width of inflorescences, and the diameter of shoots. Treatment of H. paniculata cv. ‘Tardiva’ with Root-Zone and Moisturin anti-transpirants with a single irrigation every other day allows to reduce the water consumption and obtain shrubs of a quality comparable with plants irrigated twice a day. The use of Moisturin with a twice daily irrigation positively affected the length and width of inflorescences.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of copper concentration on micropropagation and accumulation of some metals in the Dendrobium kingianum Bidwill orchid
Autorzy:
Prazak, R.
Molas, J.
Tematy:
orchid
Dendrobium kingianum
copper concentration
micropropagation
metal accumulation
biometric feature
in vitro culture
calcium
zinc
iron
copper
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Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Powiązania:
https://bibliotekanauki.pl/articles/14504.pdf  Link otwiera się w nowym oknie
Opis:
The study focused on the influence of an increased copper content in the Murashige and Skoog (1962) solid medium on the in vitro plant growth and development of Dendrobium kingianum Bidwill. Sterile explants of pseudobulbs were used for micropropagation of orchid plants on the MS regeneration medium supplemented with 0.5 mg dm-3 NAA and 1.0 mg dm-3 kinetin. Copper (as CuSO4 × 5H2O) was added to all the combinations in concentrations of 0.025 (control), 0.625, 1.25, 2.5 and 5.0 mg dm-3. The results showed that the treatments with 1.25 and 2.5 mg dm-3 stimulated the orchid growth and development in in vitro culture. After eight months of growing in in vitro culture, the highest number of shoots, the longest roots and the heaviest fresh weight of plantlets were obtained in these treatments. In medium with the highest copper concentration (5.0 mg dm-3), a negative influence of the metal on the length of roots and fresh weight of orchids was noted. Spectrophotometric analysis (ASA) showed that the copper and iron accumulation increased in both shoots and roots with the increase in the external Cu level, whereas the zinc and calcium accumulation in these organs decreased. The copper and zinc accumulation in the roots was about 1.5-2.5 times higher than in the shoots, but the iron accumulation was about 3-3.5 times higher. The calcium accumulation in roots was only 5-12% higher than in shoots.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ deficytu wodnego na wskaźniki wymiany gazowej, produkcyjność i zdrowotność ziarna odmian pszenicy ozimej
Effect of water deficit on gas exchange parameters, productivity and grain health of winter wheat cultivars
Autorzy:
Olszewski, J.
Pszczolkowska, A.
Kulik, T.
Fordonski, G.
Plodzien, K.
Okorski, A.
Wasielewska, J.
Tematy:
cechy biometryczne
deficyt wody
fizjologia roslin
fotosynteza
Fusarium
gleby
grzyby chorobotworcze
pszenica ozima
transpiracja
uprawa roslin
wymiana gazowa
zasiedlanie
zdrowotnosc
ziarno
biometric feature
gas exchange
grain
grain health
pathogenic fungi
photosynthesis
plant cultivation
plant physiology
soil
transpiration
water deficiency
winter wheat
Pokaż więcej
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Powiązania:
https://bibliotekanauki.pl/articles/47180.pdf  Link otwiera się w nowym oknie
Opis:
W latach 2004-2005 mierzono intensywność fotosyntezy, transpiracji, międzykomórkowe stężenie CO2 oraz przewodność szparkową dwóch odmian pszenicy ozimej. Ponadto określono zasiedlenie grzybami ich ziarniaków. Wykazano, że deficyt wody spowodował obniżenie wskaźników wymiany gazowej, cech biometrycznych i masy ziarna. Stwierdzono niższe zasiedlenie ziarna obu odmian pszenicy przez patogeny grzybowe na obiektach z niedoborem wody w pierwszym roku badań. W kolejnym roku zależności nie były jednoznaczne.
The rate of photosynthesis and transpiration, intercellular CO2 concentration, and stomatal conductance of two cultivars of winter wheat were determined in the study. The severity of fungal infection of the grain was also estimated. It was found that water deficit decreased the values of gas exchange parameters, biometric characters and grain weight. In the first year the number of fungal isolates in wheat grain of both cultivars was lower under water stress conditions. However, in the next year the findings were ambiguous.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Process of fingerprint authentication using cancelable biohashed template
Autorzy:
Mamatha, K. R.
Radhika, K. R.
Tematy:
biohashing
cancelable biometric
feature transformation
fingerprint
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Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/58810076.pdf  Link otwiera się w nowym oknie
Opis:
Template protection using cancelable biometrics prevents data loss and hacking stored templates, by providing considerable privacy and security. Hashingand salting techniques are used to build resilient systems. Salted password method is employed to protect passwords against different types of attacksnamely brute-force attack, dictionary attack, rainbow table attacks. Salting claims that random data can be added to input of hash function to ensure unique output. Hashing are speed bumps in an attacker’s road to breach user’s data. Research proposes a contemporary two factor authenticator called Biohashing. Biohashing procedure is implemented by recapitualted inner productover a pseudo random number generator key, as well as fingerprint features that are a network of minutiae. Cancelable template authentication used infingerprint-based sales counter accelerates payment process. Fingerhash is code produced after applying biohashing on fingerprint. Fingerhash is a binary string procured by choosing individual bit of sign depending on a preset threshold. Experiment is carried using benchmark FVC 2002 DB1 dataset. Authentication accuracy is found to be nearly 97%. Results compared with state-of-art approaches finds promising.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Scheme for Template Security at Feature Fusion Level in Multimodal Biometric System
Autorzy:
Selwal, A.
Gupta, S. K.
Kumar, S.
Tematy:
feature template
biometric data
feature vectors
multimodal biometrics
fuzzy sets
database
feature fusion
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/102518.pdf  Link otwiera się w nowym oknie
Opis:
Biometrics is the science of human recognition by means of their biological, chemical or behavioural traits. These systems are used in many real life applications simply from biometric based attendance system to providing security at a very sophisticated level. A biometric system deals with raw data captured using a sensor and feature template extracted from raw image. One of the challenges being faced by designers of these systems is to secure template data extracted from the biometric modalities of the user and protect the raw images. In order to minimize spoof attacks on biometric systems by unauthorised users one of the solutions is to use multi-biometric systems. Multi-modal biometric system works by using fusion technique to merge feature templates generated from different modalities of the human. In this work, a novel scheme is proposed to secure template during feature fusion level. The scheme is based on union operation of fuzzy relations of templates of modalities during fusion process of multimodal biometric systems. This approach serves dual purpose of feature fusion as well as transformation of templates into a single secured non invertible template. The proposed technique is irreversible, diverse and experimentally tested on a bimodal biometric system comprising of fingerprint and hand geometry. The given scheme results into significant improvement in the performance of the system with lower equal error rate and improvement in genuine acceptance rate.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vein Biometric Recognition Methods and Systems: A Review
Autorzy:
Al-Khafaji, Ruaa S.S.
Al-Tamimi, Mohammed S.H.
Tematy:
biometric technology
finger vein recognition
pre-processing
feature extraction
matching
Pokaż więcej
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:
https://bibliotekanauki.pl/articles/2022496.pdf  Link otwiera się w nowym oknie
Opis:
The Finger-vein recognition (FVR) method has received increasing attention in recent years. It is a new method of personal identification and biometric technology that identifies individuals using unique finger-vein patterns, which is the first reliable and suitable area to be recognized. It was discovered for the first time with a home imaging system; it is characterized by high accuracy and high processing speed. Also, the presence of patterns of veins inside one’s body makes it almost difficult to repeat and difficult to steal. Based on the increased focus on protecting privacy, that also produces vein biometrics safer alternatives without forgery, damage, or alteration over time. Fingerprint recognition is beneficial because it includes the use of low-cost, small devices which are difficult to counterfeit. This paper discusses preceding finger-vein recognition approaches systems with the methodologies taken from other researchers’ work about image acquisition, pretreatment, vein extraction, and matching. It is reviewing the latest algorithms; continues to critically review the strengths and weaknesses of these methods, and it states the modern results following a key comparative analysis of methods.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wlasciwosci agrofizyczne amarantusa [Amaranthus cruentus L.]
Agrophysical properties of amaranth ( Amaranthus cruentus L.)
Autorzy:
Szot, B
Tematy:
uprawa roslin
Amaranthaceae
Amaranthus
szarlat
nasiona
zbior
plony
wlasciwosci agrofizyczne
wlasciwosci fizyczne
cechy aerodynamiczne
wlasciwosci reologiczne
cechy geometryczne
cechy biometryczne
grubosc lodyg
wysokosc roslin
masa wiechy
wysokosc wiechy
szerokosc wiechy
chropowatosc
cechy jakosciowe
sklad chemiczny
plant cultivation
amaranth
seed
harvest
yield
agrophysical property
physical property
aerodynamic property
rheological property
geometrical feature
biometric feature
stem thickness
plant height
panicle mass
panicle height
panicle width
roughness
qualitative trait
chemical composition
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1630379.pdf  Link otwiera się w nowym oknie
Opis:
Biometrical features of plants and physical properties of amaranth seeds (Amaranihus cruentus) of a population variety originating from South America and a new Polish variety Rawa have been studied. New research methods were worked out or old methods were adapted to suit specific features of this plant. Studies were carried out in the period 1995-96 (population variety) and in 1997 (variety Rawa). Alongside field experiments plot experiments with varying sowing density were conducted in order to evaluate the influence of the number of plants per 1 mL plant on the variability of biometrical features and yields. Plant and wisp height, stalk thickness, wisp mass, number of plants per 1 mL and biological yield as well as seed self-shedding were determined. Geometrical properties (thickness, width, and length) were determined for individual seeds together with their aerodynamic features, surface roughness, resistance to static loading and microstructure. Whereas seed mass was characterised by such parameters as: density, porosity, outer and inner friction, angle of repose and chute, rehological properties and qualitative features. It has been found out that Rawa variety was more uniform than population variety and gave yields that were 50% higher. Seed sowing density differentiated plant biometrical features. Seed self-shedding in different weather conditions ranged from 0,3 to 2.1% of the biological yield. Physical properties of seeds changed according to moisture levels which was described by the regression lines and curves. It was found that with moisture decrease seed thickness, and the mean values ranged from 0,58 to 0,93 mm. Seeds of Rawa variety were developed better. The weight of 1000 seeds was from 0,60 g (very dry seeds) to 0,95 g (very moist seeds). Density was increasing with the decrease in moisture from 653,3 to 842,0 kg/m3. Whereas, porosity of the seed mass decreased from 53,5 to 40,0 %. Both the angle of repose and chute were decreasing with the decrease in the coefficient of inner and outer friction while the roughness of the seed surface was increasing. Amaranth seeds appeared to be more resistant to mechanical loading. The force ranging from 10.7N (very moist seeds) to 70,6N (dry seeds) was sufficient to damage the structure of an individual seed. Aerodynamic seed features depended on such parameters as seed load bearing surface, width, length and weight. With the increase in these parameters critical velocity increased linearly, and the coefficient of volatility decreased according to the same formula.A generalised Maxwell model with three branches was used to describe the phenomena of stress relaxation in the seed mass. It led to the conclusion that amaranth seeds en mass show strong viscoelastic properties. Seed qualitative features show high nutritive value, and evaluation of their microstructure showed that they contain unique starch with kernels thet are very uniform in size (1-1,5(m). Learning about biometrical plant features and their physical properties allowed for working out agrophysical basic for the harvest technology of this plant.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intra- and interindividual variability of selected quantitative features of pollen grain morphology based on the example of Rosa canina L. (Rosaceae)
Autorzy:
Wronska-Pilarek, D.
Jagodzinski, A.M.
Tematy:
intraindividual variation
interindividual variability
quantitative feature
pollen grain
morphology
Rosa canina
Rosaceae
palynology
biometric analysis
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/41774.pdf  Link otwiera się w nowym oknie
Opis:
The objective of this study was to investigate the ranges of intra- and interindividual variability on the example of R. canina. For this purpose, four flowers were collected randomly (72 flowers in total)from 18 wild shrubs of R. canina growing in one population in Poznań (Poland)and then, from each flower, 50 correctly formed pollen grains (200 pollen grains per each individual)were selected. Inter- and intraindividual pollen grain variability was characterised based on 3600 pollen grains. They were analysed for seven quantitative features, i.e. length of polar axis (P), equatorial diameter (E), thickness of the exine along the polar axis (Exp), length of ectocolpi (Le) and P/E, Exp/P, and Le/P ratios. Our study revealed highly significant differences among flowers of the particular R. canina individuals with respect to all pollen grain biometrical features. In addition, it showed that the assessment of the full range of variability in pollen grain biometric features within one individual (shrub)was more reliable if we examined several pollen grains from several flowers than for the same number of pollen grains derived from a single flower. We also found statistically significant differences among particular individuals in all pollen grain features. This proves that in order to well characterise a population of a given species from the point of view of palynology, the plant material should derive from a possibly numerous number of individuals (shrubs).
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel feature biometric fusion approach for iris, speech and signature
Nowatorskie połączenie cech biometrycznych dla tęczówki, mowy i podpisu
Autorzy:
Garg, Mamta
Arora, Ajat Shatru
Gupta, Savita
Tematy:
biometric fusion
scale invariant feature transform
2-dimensional principle component analysis
mel-frequency cepstral coefficient
genetic algorithms
artificial neural networks
Pokaż więcej
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Powiązania:
https://bibliotekanauki.pl/articles/29520274.pdf  Link otwiera się w nowym oknie
Opis:
With an ever-increasing emphasis on security and the new dimensions in security challenges facing the world today, the need for automated personal identification/verification system based on multimodal biometrics has increased. This paper addresses the issue of multiple biometric fusion to enhance the security of recognition. The paper utilizes iris, speech,and signature for the novel fusion. A segregated classification mechanism for each biometric is also presented. The fusion is done on the base of features extracted at the time of individual classification of biometrics. Different feature extraction algorithms are applied for different biometrics. The paper has utilized 2-Dimensional Principle Component Analysis (2DPCA) for Iris, Scale Invariant Feature Transform (SIFT) for signature and Mel-frequency cepstral coefficients for speech biometric. This paper utilizes Genetic Algorithm for the optimization of the evaluated features. The classification is done using Artificial Neural Network (ANN).
W związku z ciągłym wzrostem wymagań dotyczących bezpieczeństwa i nowymi wyzwaniami stojącymi dzisiaj w tym zakresie przed światem istnieje potrzeba tworzenia ststremów wykorzystujących biometrię multimodalną do automatycznej identyfikacji/weryfikacji osób. Artykuł opisuje problem zastosowania multimodalnej fuzji biometrycznej do poprawy bezpieczeństwa rozpoznawania osób. Do nowej fuzji wykorzystano tęczówkę, mowę i podpis. Zaprezentowano oddzielny mechanism dla każdego czynnika biometrycznego. Fuzję przeprowadzono wykorzystując cechy wybrane w danej chwili czasu indywidualnie dla każdego czynnika. Dla różnych czynników zastosowano różny algorytm wyboru cech biometrycznych. Zastosowano 2- wymiarową analizę podstawowych składników (ang. 2-Dimensional Principle Component Analysis - 2DPCA) dla tęczówki, skaloniezmiennicze przekształcenie cech (ang. Scale Invariant Feature Transform - SIFT) dla podpisu oraz parametry melcepstralne (ang. Mel-Frequency Cepstral Coefficients) dla mowy. W artykule wykorzystano metodę Algorytmów Genetycznych do optymalizacji oceny poszczególnych cech. Klasyfikację przeprowadzono wykorzystując sztuczne sieci neuronowe.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 12

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