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Search Results: 1 - 10 of 189868 matches for " G. Pesti "
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On KLJN-based secure key distribution in vehicular communication networks
X. Cao,Y. Saez,G. Pesti,L. B. Kish
Computer Science , 2014, DOI: 10.1142/S021947751550008X
Abstract: In a former paper [Fluct. Noise Lett., 13 (2014) 1450020] we introduced a vehicular communication system with unconditionally secure key exchange based on the Kirchhoff-Law-Johnson-Noise (KLJN) key distribution scheme. In this paper, we address the secure KLJN key donation to vehicles. This KLJN key donation solution is performed lane-by-lane by using roadside key provider equipment embedded in the pavement. A method to compute the lifetime of the KLJN key is also given. This key lifetime depends on the car density and gives an upper limit of the lifetime of the KLJN key for vehicular communication networks.
Securing vehicle communication systems by the KLJN key exchange protocol
Y. Saez,X. Cao,L. B. Kish,G. Pesti
Computer Science , 2014, DOI: 10.1142/S0219477514500205
Abstract: We review the security requirements for vehicular communication networks and provide a critical assessment of some typical communication security solutions. We also propose a novel unconditionally secure vehicular communication architecture that utilizes the Kirchhoff-law-Johnson-noise (KLJN) key distribution scheme.
Rain Forest or Metropolis: Brazilian Modernists' Debate Between the Local and the Global in Literature
Mele Pesti
Interlitteraria , 2013, DOI: 10.12697/il.2012.17.12
Abstract: -
Complex formation of EphB1/Nck/Caskin1 leads to tyrosine phosphorylation and structural changes of the Caskin1 SH3 domain
Szabolcs Pesti, Annamária Balázs, Roopesh Udupa, Beáta Szabó, Anna Fekete, Gábor B?gel, László Buday
Cell Communication and Signaling , 2012, DOI: 10.1186/1478-811x-10-36
Abstract: Here we demonstrate that EphB1 receptor tyrosine kinase can recruit Caskin1 through the adaptor protein Nck. Upon activation of the receptor kinase, the SH2 domain of Nck binds to one of its tyrosine residues, while Nck SH3 domains interact with the proline-rich domain of Caskin1. Complex formation of the receptor, adaptor and scaffold proteins results in the tyrosine phosphorylation of Caskin1 on its SH3 domain. The phosphorylation sites were identified by mass-spectrometry as tyrosines 296 and 336. To reveal the structural consequence of this phosphorylation, CD spectroscopy was performed. This measurement suggests that upon tyrosine phosphorylation the structure of the Caskin1 SH3 domain changes significantly.Taken together, we propose that the scaffold protein Caskin1 can form a complex with the EphB1 tyrosine kinase via the Nck protein as a linker. Complex formation results in tyrosine phosphorylation of the Caskin1 SH3 domain. Although we were not able to identify any physiological partner of the SH3 domain so far, we could demonstrate that phosphorylation on conserved tyrosine residues results in marked changes in the structure of the SH3 domain.The Eph family is the largest family of receptor tyrosine kinases, at least, 14 different Eph kinases have been identified so far [1,2]. These receptors can be divided into two subclasses (EphB and EphA) based on the cell surface ligand which they interact with. Ligands that interact with EphA receptors are generally attached to the cell surface via glycosylphosphatidylinositol (ephrinA ligands), while ligands that activate EphB receptors are transmembrane proteins (ephrinB ligands) [1,2]. Eph receptor kinases and their ligands (ephrins) play a critical role in embryonic patterning, angiogenesis and neuronal targeting [2-4]. In the nervous system, EphB receptor kinases are enriched at excitatory synapses and are important during synapse and spine formation and maintenance [2].Adaptor proteins, composed almost entirely
Validity assessment of financial plans based on FADN data
Szilárd Keszthelyi,Csaba Pesti
Agrárinformatika Folyóirat , 2010,
Abstract: The global financial crisis establishes new obstacles, requirements and challenges to the agricultural producers. In such circumstances it is especially important for farmers to base their investment and financial decisions on well-founded methods using multiple information sources. In Hungary during the reviewing of the credit applications the assessment of financial plans has only minor importance as banks tend to avoid granting loans on business grounds and rather favour loans secured by mortgages or other means. However, if for the assessment of financial plans there were a well-worked out, reliable tool available that could make the reviewing of loan application much easier. Assuring higher security for loans would not only increase the amount of credits granted but in the long run could reduce the interest rates as well. In this paper we intend to introduce a concept, based on FADN data, that will make the assessment of the validity of the financial plans possible. The core of the method is the selection of very similar FADN holdings and whether the farms’ income will secure the redemption of the required loan will be assessed from the data of these holdings.
Treatment of Advanced Cervical Cancer with Complex Chemoradio-Hyperthermia
L. Pesti,Zs. Dankovics,P. Lorencz,A. Csejtei
Conference Papers in Science , 2013, DOI: 10.1155/2013/192435
Abstract: This single arm, retrospective, single institution study investigated intention to treat patients ( ) with advanced cancer of cervix of uterus. The study was performed in 2001–2010, providing 331 sessions. All patients had radiotherapies as fractional radiotherapy and intracavital brachytherapy. Some patients ( ) received chemotherapy (Cisplatin 40?mg/m2/week; concomitantly with tele-radiotherapy) as well. Complementary to the teleradiotherapy, oncothermia was used two times a week, targeting the pelvis. Applied energy dose was 45?W, 60?min. Oncothermia was applied immediately after the infusion, when chemotherapy was also administered. Complete and partial remission were achieved in trimodal therapies for 73.5% of the patients, while we could stabilize the disease for 14.7% of the patients. 1. Introduction Carcinoma of the cervix of uterus is the second deadly female malignancy after mammary carcinomas. Cervical cancer incident in Hungary: 21 incidences per 100,000 females (higher than the rate in Eastern Europe) and the mortality rate is 9.6/100,000 women/year, which means the deaths of 500 women a year, [1]. Hyperthermia treatments are popular for gynecological applications [2, 3]. These focus on radiotherapy combinations [4], showing highly significant benefit of hyperthermia in overall survival, disease-free survival, and local-relapse-free survival made by randomized trial [4]. A large randomized controlled clinical trial of the radiohyperthermia is published in the Lancet [5], with great success. The results were very promising [5], but the control study [6] was disappointing. The explanation may be simple; a reference point was missing [7]. The chemotherapy combination (Cisplatin + hyperthermia for previously radiated cases) also shows feasibility [8] as well as the trimodal applications for cervix [9–11]. There are large debates in the topic [12], with counterpoints [13] and contras [14]. Our objective is to treat advanced cervical tumors with a new kind of hyperthermia (oncothermia) and add new results for the professional discussions. Our department accepts patients from the three neighboring counties (Veszprém, Zala, and Vas) for preoperative, postoperative, definitive, and palliative treatments. In addition to the applied standard professional protocols since 2001 we have the possibility to apply complementary oncothermia treatments. 2. Method A single arm, retrospective, single institution study investigated intention to treat patients ( ) with advanced cancer of cervix of uterus for intention to treat (ITT) population. The study was
A Characterization of the Members of a Subfamily of Power Series Distributions  [PDF]
G. Nanjundan
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.26099
Abstract: This paper discusses a characterization of the members of a subfamily of power series distributions when their probability generating functions satisfy the functional equation where a, b and c are constants and is the derivative of f.
Double Negative Left-Handed Metamaterials for Miniaturization of Rectangular Microstrip Antenna  [PDF]
G. Singh
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.26044
Abstract: In this paper, I have explored a significant concept for the miniaturization of microstrip patch antenna configuration by using the double negative (DNG) left-handed Metamaterials, which have dielectric permittivity and magnetic permeability both negative, simultaneously. It is achieved through the concept of phase-compensation by thin slab consist of the double positive (DPS) material, which have dielectric permittivity and magnetic permeability both positive, simultaneously and DNG metamaterials as a substrate of the microstrip patch antenna. By combining the DNG metamaterial slab with the slab made of DPS materials form a cavity resonator whose dispersion relation is independent of the sum of thickness of the slabs filling this cavity but it depends on the ratio of their thicknesses. This cavity constitutes by DPS and DNG material is used as substrate of the microstrip antennas and the DNG material slab is behave as phase compensator.
Dynamic and Configurational Approach to the Glass Transition by Nanoscale Cooperativity  [PDF]
G. Romeo
Open Journal of Biophysics (OJBIPHY) , 2012, DOI: 10.4236/ojbiphy.2012.23012
Abstract: Here we examine the findings obtained for disaccharide/water mixtures near glass transition that involves cooperative relaxation features on kinetic by viscosity and on thermodynamic behaviour by neutron scattering. Then to address cooperative phenomena that mitigate the Debye-Waller behaviour we invoke Adam-Gibbs’ idea of a cooperative rearranging region. Neutron results suggest that the excess mean square displacement behaves as free volume and is closely connected to an elementary step of the structural relaxation. Then viscosity data evidence a breakdown of the Einstein-Debye relation, decoupling attributed to the intermolecular cooperativity.
Confidence Level Estimator of Cosmological Parameters  [PDF]
G. Sironi
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.329157
Abstract: Cosmological Models frequently suggest the existence of physical, quantities, e.g. dark energy, we cannot yet observe and measure directly. Their values are obtained indirectly setting them equal to values and accuracy of the associated model parameters which best fit model and observation. Apparently results are so accurate that some researchers speak of precision cosmology. The accuracy attributed to these indirect values of the physical quantities however does not include the uncertainty of the model used to get them. We suggest a Confidence Level Estimator to be attached to these indirect measurements and apply it to current cosmological models.
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