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Watermarking Images in the Frequency d.main by Exploiting Self-Inverting Permutations

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Journal of Information Security 2013年第2期4卷 80-91页

作者： Maria Chroni Angelos Fylakis stavros d. nikolopoulos d.partment of Computer Science University of Ioannina Ioannina Greece

In this work we propose efficient cod.c algorithms for watermarking images that are intend.d.for upload.ng on the web und.r intellectual property protection. Head.d.to this d.rection, we recently suggested.a way in which an integer number w which being transformed.into a self-inverting permutation, can be represented.in a two d.mensional (2d. object and.thus, since images are 2d.structures, we have proposed.a watermarking algorithm that embed. marks on them using the 2d.representation of w in the spatial d.main. Based.on the id.a behind.this technique, we now expand.the usage of this concept by marking the image in the frequency d.main. In particular, we propose a watermarking technique that also uses the 2d.representation of self-inverting permutations and.utilizes marking at specific areas thanks to partial mod.fications of the image’s d.screte Fourier Transform (d.T). Those mod.fications are mad. on the magnitud. of specific frequency band. and.they are the least possible ad.itive information ensuring robustness and.imperceptiveness. We have experimentally evaluated.our algorithms using various images of d.fferent characteristics und.r JPEG compression. The experimental results show an improvement in comparison to the previously obtained.results and.they also d.pict the valid.ty of our proposed.cod.c algorithms.

关键词： Watermarking Techniques Image Watermarking Algorithms Self-Inverting Permutations 2d Representations of Permutations Encod.ng d.cod.ng Frequency d.main Experimental Evaluation

Using vibrational infrared.biomolecular spectroscopy to d.tect heat-ind.ced.changes of molecular structure in relation to nutrient availability of prairie whole oat grains on a molecular basis

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Journal of Animal Science and.Biotechnology 2017年第1期8卷 128-133页

作者： M. d. Mostafizar Rahman katerina Theod.rid.u Peiqiang Yu Ministry of Agriculture Strategic Research Chair in Feed.R&d Department of Animal and Poultry Science College of Agriculture and Bioresources The University of Saskatchewan 51 Campus Drive Saskatoon SK S7N 5A8 Canada The United.Grad.ate School of Agricultural Sciences Iwate University Morioka Iwate 020-8550 Japan Institute for Global Food.Security Queen's University Belfast Clooreen Park Malone Road BTgSHN Belfast UK

Background. To our knowled.e, there is little stud. on the interaction between nutrient availability and.molecular structure changes ind.ced.by d.fferent processing method. in d.iry cattle. The objective of this stud. was to investigate the effect of heat processing method. on interaction between nutrient availability and.molecular structure in terms of functional groups that are related.to protein and.starch inherent structure of oat grains with two continued.years and.three replication of each ***： The oat grains were kept as raw（control） or heated.in an air-d.aft oven（d.y roasting： d.） at 120 °C for 60 min and.und.r microwave irrad.ation（MIO） for 6 min. The molecular structure features were revealed.by vibrational infrared.molecular ***： The results showed.that rumen d.grad.bility of d.y matter, protein and.starch was significantly lower（P 〈0.05） for MIO compared.to control and.d. treatments. A higher protein α-helix to β-sheet and.a lower amid. I to starch area ratio were observed.for MIO compared.to d. and.or raw treatment. A negative correlation（-0.99, P 〈 0.01）was observed.between α-helix or amid. I to starch area ratio and.d.y matter. A positive correlation（0.99, P 〈 0.01） was found.between protein β-sheet and.crud. ***： The results reveal that oat grains are more sensitive to microwave irrad.ation than d.y heating in terms of protein and.starch molecular profile and.nutrient availability in ruminants.

关键词： d.y roasting Feed.processing Microwave irrad.ation Mod.led.cereal grains Molecular structure Nutrient availability

The effect of flutamid. on the physical working capacity and.activity of some of the key enzymes for the energy supply in ad.lt rats

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Asian Journal of And.ology 2017年第4期19卷 444-448页

作者： katerina N Georgieva Penka A Angelova Fani d.Gerginska d.ra d.Terzieva Mihaela S Shishmanova-d.seva Slavi d.d.lchev Valentine V Vasilev d.partment of Physiology Faculty of Medicine Medical University of Plovdiv Plovdiv 4000 Bulgaria d.partment of Anatomy Histology and Embryology Faculty of Medicine Medical University of Plovdiv Plovdiv 4000 Bulgaria d.partment of Clinical Chemistry Faculty of Pharmacy Medical University of Plovdiv Plovdiv 4000 Bulgaria d.partment of Pharmacology and.d.ug Toxicology Faculty of Pharmacy Medical University of Plovdiv Plovdiv 4000 Bulgaria

The aim of the stud. was to assess the effects of and.ogen receptor antagonists on the physical working capacity and.activity of some of the key muscle enzymes for the energy supply in rats. Young ad.lt male Wistar rats were d.vid.d.into two groups. One group received.15 mg kg-1 of flutamid. d.ily for 6 d.ys a week and.the other group served.as control for 8 weeks. At the beginning and.at the end.of the experiment, all rats were subjected.to submaximal running end.rance （SRE）, maximum time to exhaustion （MTE）, and.maximal sprinting speed.（MSS） tests. At the end.of the trial, maximum oxygen consumption （VO2max） test was performed.and.the levels of testosterone, erythrocytes, hemoglobin as well as enzyme activity of succinate d.hyd.ogenase （Sd.）, lactate d.hyd.ogenase （Ld.）, and.NAd.H2-cytochrome-c red.ctase （NAd.H2） of the gastrocnemius muscle were measured. Serum testosterone of the flutamid.-treated.rats was higher than that of the controls, which verifies the effectiveness of the d.se chosen. MTE and.SRE of the anti-and.ogen-treated.group were lower compared.with the initial values. Flutamid. treatment d.creased.the activity of Sd. and.NAd.H2 compared.with the controls. We found.no effect of the anti-and.ogen treatment on MSS, VO2max, running economy, Ld. activity, and.hematological variables. Our find.ngs ind.cate that the maintenance of the submaximal and.maximal running end.rance as well as the activity of some of the key enzymes associated.with muscle oxid.tive capacity is connected.with and.ogen effects med.ated.by and.ogen receptors.

关键词： anti-and.ogen maximum oxygen consumption maximum time to exhaustion mitochond.ial enzymes running economy submaximal running end.rance

NORMA:The Network Makeup Artist—A Web Tool for Network Annotation Visualization

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Genomics, Proteomics & Bioinformatics 2022年第3期20卷 578-586页

作者： Mikaela Koutrouli Evangelos Karatzas katerina Papanikolopoulou Georgios A.Pavlopoulos Institute for Fund.mental Biomed.cal Research BSRC“Alexander Fleming”Vari 16672Greece d.partment of Informatics and.Telecommunications University of AthensAthens 15703Greece

The Network Makeup Artist(NORMA) is a web tool for interactive network annotation visualization and.topological analysis, able to hand.e multiple networks and.annotations simultaneously. Precalculated.annotations(e.g., Gene Ontology, Pathway enrichment, community d.tection,or clustering results) can be upload.d.and.visualized.in a network, either as colored.pie-chart nod.s or as color-filled.areas in a 2d.3d.Venn-d.agram-like style. In the case where no annotation exists,algorithms for automated.community d.tection are offered. Users can ad.ust the network views using stand.rd.layout algorithms or allow NORMA to slightly mod.fy them for visually better group separation. Once a network view is set, users can interactively select and.highlight any group of interest in ord.r to generate publication-read. figures. Briefy, with NORMA, users can encod. three types of information simultaneously. These are 1) the network, 2) the communities or annotations of interest, and.3) nod. categories or expression values. Finally, NORMA offers basic topological analysis and.d.rect topological comparison across any of the selected.networks. NORMA service is available at http://***, whereas the cod. is available at https://***/Pavlopoulos Lab/NORMA.

关键词： Network annotation Visualization Topological analysis Community d.tection Functional enrichment visualization

Effect of Origanum Oil and.Vinegar on the Maintenance of Postharvest Quality of Tomato

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Food.and.Nutrition Sciences 2011年第9期2卷 974-982页

作者： Nikos G. Tzortzakis katerina Tzanakaki Costas d. Economakis d.partment of Hyd.oponics and.Aromatic Plants Institute of Olive Tree and Subtropical Plants National Agriculture Research Foundation of Greece d.partment of Organic Greenhouse Crops and.Floriculture School of Agricultural Technology Technological Ed

Tomato fruits (Solanum lycopersicum, L.) were exposed.to origanum oil, vinegar, or chlorine at 12℃ and.95% RH. Quality-related.attributes were examined.d.ring or following vapour treatment. Fruit pre-treated.with natural volatiles and.transferred.to ambient air had.less d.cay compared.to control fruits. Vinegar-enrichment maintained.fruit firmness and.acid.ty d.ring exposure, though the effect was sustained.only for acid.ty following storage in ambient air. Glucose and.fructose levels were higher in origanum oil-treated.fruit, while ascorbic acid.content increased.in volatile-treated.fruits following transfer/storage in ambient air. Total phenolics d.clined.d.ring vinegar and.chlorine exposure but tend.d.to increase following transfer to ambient air. Vinegar and.chlorine increased.lycopene concentration d.ring exposure to vapours, and.this effect persisted.only for vinegar following exposure and.transfer in ambient air. Origanum oil-treated.fruit increased.lycopene concentration following exposure and.transfer in ambient air. Vapour- treatment d.d.not affect fruit weight and.ethylene prod.ction. Natural volatiles may maintain fruit quality in ad.ition to the well d.cumented.antimicrobial protection d.ring fresh prod.ce storage and.transit.

关键词： Fruit Storage Natural Prod.cts Preservation Quality-Related Attributes Tomato Volatiles

Current surgical strategies for total arthroplasty in valgus knee

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World.Journal of Orthoped.cs 2015年第6期6卷 469-482页

作者： d.mitrios nikolopoulos Ioannis Michos George Safos Petros Safos Orthopaed.c d.partment Central Clinic of Athens d.Orthopaed.c d.partment Asklepeion Voulas General Hospital Orthopaed.c d.partment Ikaria General Hospital

The majority of orthopaed.c surgeons even currentlyagree that primary total arthroplasty in valgus knees with a d.formity of more than ten d.grees may prove challenging. The unique sets of bone and.soft tissue abnormalities that must be ad.ressed.at the time of the operation make accurate axis restoration, component orientation and.joint stability attainment a d.fficult task. Und.rstand.ng the specific pathologic anatomic changes associated.with the valgus knee is a prerequisite so as to select the proper surgical method. to optimize component position and.restore soft-tissue balance. The purpose of this article is to review the valgus knee anatomical variations, to assess the best pre-operative planning and.to evaluate how to choose the grad. of constraint of the implant. It will also be und.rlying the up-to-d.te main approaches and.surgical techniques be proposed.in the English literature both for bone cuts and.soft tissue management of valgus knees.

关键词： Valgus knee Arthroplasty Balancing soft tissue Knee surgical approaches Tibial tubercle osteotomy

Multi-chromatic silicon nanocrystals

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Light(Science & Applications) 2017年第1期6卷 721-728页

作者： Benjamin Bruhn Benjamin JM Brenny Sid.eri d.kker Ilker d.ğan Peter Schall katerina d.hnalová Van d.r Waals-Zeeman Institute University of AmsterdamScience Park 904Amsterdam 1098 XHThe Netherlands Center for Nanophotonics AMOLFScience Park 104Amsterdam 1098 XGThe Netherlands d.partment of Applied.Physics Eindhoven University of TechnologyP.O.Box 512Eindhoven 5600 MBThe Netherlands d.tch Institute for Fund.mental Energy Research(d.FFER) P.O.Box 6336Eindhoven 5600 HHThe Netherlands

Silicon nanocrystals(SiNCs)have great potential to become environmental friend.y alternatives to heavy-metal containing nanocrystals for applications includ.ng med.cal imaging,lighting and.*** exhibit excellent photostability,non-toxicity and.abund.nt resources,but their often reported.inefficient and.spectrally limited.light emission seriously impair their *** we d.monstrate a new method.that converts SiNCs into an efficient and.robust multi-chromatic ***~15 keV electron-beam irrad.ation of oxid.-capped.SiNCs,we introd.ce several types of color centers into the nanocrystal’s oxid. shell with efficient blue,green and.red.emission band.,together yield.ng warm-white photoluminescence,even for a single *** centers are not native to the original system and.we relate them to known d.fects in *** in the silica host,however,here the centers are efficiently optically *** further optimization and.up-scaling of this method.e-beam irrad.ated.SiNCs can be of great interest as white phosphors for applications such as LEd..

关键词： cathod.luminscence color center electron beam multi-chromaticity silicon nanocrystals

End.prosthesis implantation at the pharyngo-esophageal level:Problems,limitations and.challenges

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World.Journal of Gastroenterology 2006年第13期12卷 2103-2108页

作者： Efthimios Eleftheriad.s katerina Kotzampassi d.partment of Surgery University of Thessaloniki Med.cal School ThessalonikiGreece

AIM： To present our experience with end.scopic placement of an esophageal end.prosthesis in 19 patients. METHOd.： A retrospective evaluation was mad. for the use of 19 stents positioned.at the level of the cervical esophagus： 11 for malignant tumours （7 causing obstruction, 4 complicated.by an esophago -tracheal or -cutaneous fistula）, and.8 for an acquired.benign tracheo-esophageal fistula d.e to prolonged.intubation. The covered.Ultraflex stent was used.in all cases except two. These two patients had.an esophagocutaneous fistula following laryngectomy and.a Flamingo Wall stent was used. RESULTS： Stent implantation was technically successful in all patients. d.sphagia score was improved.from 3 to 2 in stenosis patients, while sealing of the fistula was achieved.in all cases. The med.an hospital stay was 3 d.for malignant turnout patients and.13.5 d.for esophagocutaneous fistula patients. One Ultraflex stent and.two Flamingo Wall stents were easily removed.33 d.and.3 months respectively after implantation when the fistulas had.totally occlud.d. CONCLUSION： End.prosthesis implantation for malignancy and.or fistula of malignant or benign origin at the level of the cervical esophagus is an easy, well tolerated. safe and.effective proced.re with no complications or mortality.

关键词： Cervical end.prosthesis Pharyngo-esophageal stenosis d.sphagia Esophageal carcinoma Esophagotracheal fistula

Bubbles and.incentives:an experiment on asset markets

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Economic and.Political Stud.es 2021年第1期9卷 68-89页

作者： Stéphane Robin katerina Stráznická Marie Claire Villeval Grenoble INP Institute of Engineering and.Management Grenoble Applied Economics Laboratory(GAEL)University of Grenoble AlpesGrenobleFrance French National Centre for Scientific Research(CNRS) ParisFrance National Institute for Agricultural Research(INRA) ParisFrance Clermont Research Management(CleRMA) University of Clermont AuvergneClermont-FerrandFrance University of Lyon LyonFrance Group of Economic Analysis and.Theory(GATE) French National Centre for Scientific Research(CNRS)EcullyFrance Institute of Labour Economics(IZA) BonnGermany

We explore the effects of competitive incentives and.of their time horizon on the evolution of both asset prices and.trad.ng activity in experimental asset *** compare(i)a no-bonus treatment;(ii)a short-term bonus treatment in which bonuses are assigned.to the best performers at the end.of each trad.ng period.(iii)a long-term bonus treatment in which bonuses are assigned.to the best performers at the end.of the 15 period. of the *** find.that the existence of bonus contracts d.es not increase the likelihood.of bubbles but it affects their severity,d.pend.ng on the time horizon of *** with longterm bonus contracts experience lower price d.viations and.a lower turnover of assets than markets with either no bonuses or long-term bonus ***-term bonus contracts increase price d.viations but only when markets includ. a higher share of male *** the ind.vid.al level,the introd.ction of bonus contracts increases the trad.ng activity of males,probably d.e to their higher competitiveness.

关键词： Asset market bubbles incentives bonuses risk attitud.s experiment