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Daniel G. Schwartz, Jidong Long, George Maroulis, Theodore E. Simos
Published: 24 August 2009
AIP Conference Proceedings, Volume 1148; https://doi.org/10.1063/1.3225448

Abstract:
Multi‐sensor intrusion detection systems (IDSs) combine the alerts raised by individual IDSs and possibly other kinds of devices such as firewalls and antivirus software. A critical issue in building a multi‐sensor IDS is alert‐correlation, i.e., determining which alerts are caused by the same attack. This paper explores a novel approach to alert correlation using case‐based reasoning (CBR). Each case in the CBR system’s library contains a pattern of alerts raised by some known attack type, together with the identity of the attack. Then during run time, the alert streams gleaned from the sensors are compared with the patterns in the cases, and a match indicates that the attack described by that case has occurred. For this purpose the design of a fast and accurate matching algorithm is imperative. Two such algorithms were explored: (i) the well‐known Hungarian algorithm, and (ii) an order‐preserving matching of our own device. Tests were conducted using the DARPA Grand Challenge Problem attack simulator. These showed that the both matching algorithms are effective in detecting attacks; but the Hungarian algorithm is inefficient; whereas the order‐preserving one is very efficient, in fact runs in linear time.
Takuya Minami, Hitoshi Fukui, Hiroshi Nagai, , , , , George Maroulis, Theodore E. Simos
Published: 24 August 2009
AIP Conference Proceedings, Volume 1148; https://doi.org/10.1063/1.3225307

Abstract:
The exciton dynamics in a ring‐shaped aggregate complex model induced by circular‐polarized laser field has been investigated using the quantum master equation (QME) approach. We observe the recurrence motion of exiton after the irradiation of a circular‐polarized laser field. It is found that the circular‐polarized laser field makes it possible to shift the oscillation phase of the exciton recurrence and thus to cause the out‐of‐phase recurrence motion, while such unique recurrence dynamics disappears in the case of the irradiation of the linear‐polarized laser field. It also turns out that the direction of phase‐shift in exciton recurrence oscillation can be controlled by the rotation direction of the circular‐polarized laser field.
D. J. Klein, V. Rosenfeld, , George Maroulis, Theodore E. Simos
Published: 24 August 2009
AIP Conference Proceedings, Volume 1148, pp 421-424; https://doi.org/10.1063/1.3225335

Abstract:
Substituents of a given type often are placeable in a sequential fashion at the sites of a fixed molecular skeleton. The differently substituted species form a collection of permutational isomers falling into a (substitution) reaction network, which may be viewed as a partially ordered set (or poset). When the substituent species are paired together (as so‐called “bidentate ligands”) to attach to neighbor sites, the permutational isomerism problem and associated reaction‐network poset is modified, as here illustrated. Extension of the ideas beyond the chemical context are noted.
Chi Yung Yam, Fan Wang, Guanhua Chen, George Maroulis, Theodore E. Simos
Published: 24 August 2009
AIP Conference Proceedings, Volume 1148, pp 662-668; https://doi.org/10.1063/1.3225398

Abstract:
A linear‐scaling time‐dependent density functional theory is developed. The equation of motion is solved for the reduced single‐electron density matrix in the real time domain. Chebyshev expansion is used for integration in time domain. Filter diagonalization is implemented to determine the excited state energies. The locality of the reduced single‐electron density matrix is utilized to ensure computational time scales linearly with system size. We summarize these methods in this brief review.
COMPUTATIONAL METHODS IN SCIENCE AND ENGINEERING: Advances in Computational Science: Lectures presented at the International Conference on Computational Methods in Sciences and Engineering 2008 (ICCMSE 2008) pp 523-526; https://doi.org/10.1063/1.3225365

Abstract:
In this paper we present an introduction to the possibilities of NFC (Near Field Communication) technology in the University environment. NFC is the key for the development of interactive systems where “intelligent” objects interact with the user just only by touching the objects with a NFC device. We support that a University environment with active objects dispatching information and services to the users (students and teachers) can introduce an appropriate environment for the fulfillment of the new Educational European directives. Here, we briefly describe some of the possibilities of the NFC technology and we include an example of the use of NFC through a Smart Poster for a scenario where a Department directory is considered.
Farzin Emami, M. Hatami, Alireza Keshavarz, A. H. Jafari, George Maroulis, Theodore E. Simos
COMPUTATIONAL METHODS IN SCIENCE AND ENGINEERING: Advances in Computational Science: Lectures presented at the International Conference on Computational Methods in Sciences and Engineering 2008 (ICCMSE 2008), Volume 1148, pp 774-777; https://doi.org/10.1063/1.3225433

Abstract:
Using a combination of Runge‐Kutta and Jacobi iterative method, we could solve the nonlinear Schrödinger equation describing the pulse propagation in FBGs. By decomposing the electric field to forward and backward components in fiber Bragg grating and utilizing the Fourier series analysis technique, the boundary value problem of a set of coupled equations governing the pulse propagation in FBG changes to an initial condition coupled equations which can be solved by simple Runge‐Kutta method.
Carlo Bertinetto, , , Antonina Starita, Roberto Solaro,
COMPUTATIONAL METHODS IN SCIENCE AND ENGINEERING: Advances in Computational Science: Lectures presented at the International Conference on Computational Methods in Sciences and Engineering 2008 (ICCMSE 2008) pp 400-403; https://doi.org/10.1063/1.3225329

Abstract:
We report here a recent study on the prediction by recursive neural network of the glass transition temperature of (meth)acrylic copolymers, for which appropriate structured representations are proposed. It is shown that the flexibility of such description allows for simultaneously treating different classes of compounds as well as accounting for different average properties such as tacticity and molar composition.
Shih‐Ching Lo, Yu Chao, Gin‐Yuan Lee
COMPUTATIONAL METHODS IN SCIENCE AND ENGINEERING: Advances in Computational Science: Lectures presented at the International Conference on Computational Methods in Sciences and Engineering 2008 (ICCMSE 2008) pp 480-484; https://doi.org/10.1063/1.3225353

Abstract:
In this study, four road delivery project models are analyzed by grey relational evaluation. The four models are design‐bid‐build (DBB), design‐build (DB), construction management (CM) and design‐build‐maintenance (DBM). Evaluating road project delivery models is difficult because the projects differ from road to road, state to state and country to country. Thus, the evaluation data of project delivery systems are poor and lacking. Grey theory is an effective mathematical method, which is a multidisciplinary and generic theory dealing with systems characterized by poor information and/or for which information is lacking. Therefore, grey relational analysis and grey model are employed to compare the efficiency of the four road project delivery models. According to the result, DBM is the best model. DBB is the worst one and DB is better than CM. The results may provide public sectors to employ an adequate model so as to proceed with road construction project.
, S. Nešpůrek, , , M. Pavelka, G. Wang,
COMPUTATIONAL METHODS IN SCIENCE AND ENGINEERING: Advances in Computational Science: Lectures presented at the International Conference on Computational Methods in Sciences and Engineering 2008 (ICCMSE 2008), Volume 1148, pp 157-160; https://doi.org/10.1063/1.3225260

Abstract:
We present the possible construction of organic FET‐like photoactive device in which source‐drain current through phthalocyanine ( H 2 Pc ) film is affected by photo‐induced dipolar field in a photoactive “gate” electrode. The influence of the dipolar electric field on charge transfer between H 2 Pc molecules, is modeled by DFT quantum chemical calculations on H 2 Pc dimers and tetramers.
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