<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, we provide a unified framework for identifying the source digital camera from its images and revealing digitally altered using photo-response nonuniformity noise (PRNU), which is unique stochastic fingerprint of imaging sensors. The PRNU obtained maximum-likelihood estimator derived simplified model sensor output. Both forensics tasks are then achieved by detecting presence in...

We present a new approach to detection of forgeries in digital images under the assumption that either camera took image is available or other taken by are available. Our method based on detecting presence pattern noise, which unique stochastic characteristic imaging sensors, individual regions image. The forged region determined as one lacks noise. noise established using correlation spread spectrum watermarks. proposed two approaches. In first one, user selects an area for integrity...

Photo-response non-uniformity (PRNU) of digital sensors was recently proposed [1] as a unique identification fingerprint for cameras. The PRNU extracted from specific image can be used to link it the camera that took image. Because camcorders use same imaging sensors, in this paper, we extend technique video clips. We also investigate problem determining whether two clips came camcorder and differently transcoded versions one movie camcorder. is joint estimation detection procedure...

In this paper, we demonstrate that it is possible to use the sensor's pattern noise for digital camera identification from images. The extracted images using a wavelet-based denoising filter. For each under investigation, first determine its reference noise, which serves as unique fingerprint. This could be done process of flat-fielding, if have in possession, or by averaging obtained multiple images, option taken paper. To identify given image, consider high-frequency spread spectrum...

We report on the results obtained using time-resolved Langmuir probe measurements in high-power pulsed dc magnetron sputtering discharges. Time evolutions of electron energy distribution and local plasma parameters were investigated at a substrate position 100 mm from planar target diameter during high-rate deposition copper films. The average power density pulse was 500 W cm−2 repetition frequency 1 kHz, voltage duration 200 µs an argon pressure Pa. distributions with two groups sharply...

High-power pulsed dc magnetron discharges for ionized sputtering of titanium films were investigated. The depositions performed using a strongly unbalanced source with planar target 100 mm diameter. repetition frequencies 1 and 20 kHz at 20% 50% duty cycles argon pressures 0.5 5 Pa. Time evolutions the discharge characteristics measured power density in pulse up to 740 W cm−2. Time-averaged mass spectroscopy was carried out substrate positions 100 200 mm from target. It shown that ions are...

Abstract Glyphosate is the number one herbicide in world. We investigated sub-lethal effects of this on aphid Metopolophium dirhodum (Walker), using an age-stage, two-sex life table approach. Three concentrations (low - 33.5, medium 66.9 and high 133.8 mmol dm −3 active ingredient) distilled water as control were used. The LC 50 IPA salt glyphosate M. was equivalent to 174.9 ingredient (CI 95 : 153.0, 199.0). population parameters significantly negatively affected by application, negative...

Stored-product pests cause high economic losses by feeding on stored grain and endanger the public health contamination of food allergens. Therefore, aim this work was to explore whether risk infestation is different in various types storage premises. We compared level pest species composition two main stores Central Europethat includes horizontal flat-stores (HFS) vertical silo-stores (elevators) (VSS). A total 147 located Bohemia, CzechRepublicwas inspected. found that both were infested...

The problem investigated in this paper is identification of sensor that was used to obtain a given digital image. We show the high-medium frequency component pattern noise an equivalent "bullet scratches" for images and can be reliable forensic identification. For each sensor, we first calculate its reference (an estimate noise) by averaging from multiple images. This serves as unique fingerprint whose presence image established using correlation detector. proposed technique tested on...

In this paper, we study the problem of identifying digital camera sensor from a printed picture. The is identified by proving presence its Photo-Response Non-Uniformity (PRNU) in scanned picture using ID methods robust to cropping and scaling. Two kinds prints are studied. first postcard size (4" 6") pictures obtained common commercial printing labs. These always cropped some degree. proposed identification, brute force search for scaling ratio deployed while position determined...

Germination was investigated in 1-yr and 8-yr-old seed lots of barnyardgrass. Each lot divided into a portion stored dry at 25 C (afterripening) buried the field (stratification) central Europe (latitude 50°N, longitude 14°E). The afterripened lost dormancy within 2 yr after dispersal, whereas passed through annual dormancy/nondormancy cycles. germinated five constant temperatures between 17 35 with an 18/6-h light/dark photoperiod. affected by both age storage conditions. percentage rate...

Hyperspectral imaging (HSI) has been gaining recognition as a promising proximal and remote sensing technique for crop drought stress detection. A modelling approach accounting the treatment effects on indicators’ standard deviations was applied to images of oilseed rape—a subjected various HSI studies, with exception drought. The aim present study determine spectral responses two cultivars, ‘Cadeli’ ‘Viking’, representing distinctive water management strategies, three types watering...

M artinkova Z, H onek A &amp; L ukas J (2011). Viability of Taraxacum officinale seeds after anthesis. Weed Research 51 , 508–515. Summary The management in lawns can be improved by understanding the timing seed maturation. development T. from flowering to dispersal was studied 2008 and 2009. Percentage germination, time 50% mass peduncle length increased with elapsed since end flowering. Only collected more than 5 days (DAF) germinated, germination not affected cutting capitulum peduncle....

The young larvae of insects living on dry food produce large amounts water by the metabolic combustion dietary lipids.The production needed for larval growth, previously known as hypermetabolic responses to juvenile hormone (JH), is associated with a 10-to 20-fold increase in rate O2 consumption (10,000 µl O2/g/h contrast usual 500 O2/g/h).Growing and moulting are naturally due endogenous release JH from corpora allata.At last, larval-pupal or larval-adult moult there no consequence much...

Abstract In the parasitoid Venturia canescens Gravenhorst (Hymenoptera: Ichneumonidae), asexual and sexual wasps coexist in field Mediterranean basin, but only strain is present indoors. The dominates outdoors despite demographic costs associated with production of males mate location. study tests whether females strains V. differ flight characteristics line differences their preferred habitats enquires these might contribute to persistence sexually reproducing individuals vicinity...

Glyphosate is an herbicide that used worldwide with potential environmental risks to nontarget organisms. We applied age-stage, two-sex life table approach assess the sublethal effects of short-term oral exposure a glyphosate-based on parameters and biocontrol Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae). Aphids (Metopolophium dirhodum (Walker) (Sternorrhyncha: Aphididae)) treated (an isopropylamine-salt glyphosate) at low recommended, maximum double recommended concentration for...

Heavy infestation of pasta by the internally feeding pest Sitophilus oryzae (Coleoptera: Curculionidae) was recorded for first time under field conditions in Czech Republic. Symptoms hidden (eggs, larvae, pupae and adults) a comparison optical methods to detect them are described use farmers, plant health phytoquarantine inspectors. Photo-documentation is included.