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Selected AbstractsWeb based laboratory in electromagnetic compatibility using a Java appletCOMPUTER APPLICATIONS IN ENGINEERING EDUCATION, Issue 4 2006S. K. Goudos Abstract A web based virtual laboratory in electromagnetic compatibility using a Java applet is presented. The Java applet makes use of Green's functions calculations inside a rectangular cavity. The induced electric fields and surface currents on cavity walls are calculated and visualized in a user-friendly manner. Various source configurations are examined. A number of laboratory exercises using the applet is given. © 2006 Wiley Periodicals, Inc. Comput Appl Eng Educ 14: 269,280, 2006; Published online in Wiley InterScience (www.interscience.wiley.com); DOI 10.1002/cae.20087 [source] Bis(salicylaldiminato)titanium Complexes Containing Bulky Imine Substituents: Synthesis, Characterization and Ethene Polymerization StudiesEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 11 2005Antti Pärssinen Abstract A series of titanium complexes bearing two anionic [N, O,] bidentate salicylaldiminato ligands, namely bis[(N -salicylidene)anilinato]titanium(IV) dichloride (1), bis[(N -salicylidene)-2,6-dimethylanilinato]titanium(IV) dichloride (2), bis[(N -salicylidene)-2,6-di- i - propylanilinato]titanium(IV) dichloride (3), bis[(N -salicylidene)-(1-naphthalenylimino)]titanium(IV) dichloride (4), bis[(N -salicylidene)-2,6-difluoroanilinato]titanium(IV) dichloride (5), and bis[(N -3-fluorosalicylidene)-2,6-difluoroanilinato]titanium(IV) dichloride (6) have been synthesized with good yields by a two-step procedure. The X-ray structure analysis reveals that in complex 2, titanium has a distorted octahedral coordination sphere in which the oxygen atoms and the chloride ligands form the basal plane. Both the chloride and the phenoxy moieties have a cis orientation and the angle between the chloride ligands is 93.05°. The imine nitrogen atoms complete the octahedral coordination of the Ti center by occupying the axial positions. The newly synthesized (2 and 4,6) and already known complexes (1 and 3) were introduced in detailed ethene-polymerization studies. The activities achieved were low to moderate depending on the size and nature of the imino substituents. The polyethenes (PEs) produced had high molar masses, and the modalities of the molecular weight distributions varyied with polymerization temperature. Based on the results of ab initio calculations and on the experimental data obtained, an explanation for uni- and bimodal polymerization behavior and the differences in catalytic activities are given. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) [source] New Efficient Route to Fused Aryltetrahydroindolizinones via N -Acyliminium IntermediatesEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 18 2009Matteo Chiurato Abstract Straightforward routes to fused tetrahydroindolizinones by two routes A and B, starting either from 2-formylbenzoic acid and esters or from ,-hydroxy lactones via acyl iminium ions, are described. A plausible mechanism and limitations are given. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) [source] Secotioid Agaricales (Basidiomycetes) from MongoliaFEDDES REPERTORIUM, Issue 3-4 2007H. Dörfelt PD Dr. A recapitulation of all findings of Mongolian secotioid Agaricales is given. Four species are known: Montagnea arenaria, Montagnea haussknechtii, Endoptychum agaricoides and Gyrophragmium dunalii. Two out of them, M. haussknechtii and E. agaricoides, are reported for the first time in Mongolia. An overview of distribution and systematic relationships of the taxa is given. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) Secotioide Agaricales (Basidiomycetes) aus der Mongolei Es werden alle Funde secotioider Agaricales aus der Mongolei rekapituliert. Vier Arten sind bekannt: Montagnea arenaria, Montagnea haussknechtii, Endoptychum agaricoides und Gyrophragmium dunalii. Zwei von ihnen, M. haussknechtii und E. agaricoides, werden erstmals für die Mongolei erwähnt. Es wird ein Überblick über die Verbreitung und die systematischen Beziehungen der Taxa gegeben. [source] Rediscovery of Achillea boissieriHausskn. ex Boiss. later 140 yearsFEDDES REPERTORIUM, Issue 7-8 2006T. Arabac This study includes taxonomical improvements of Achillea boissieriHausskn. ex Boiss. and distributions in Turkey which was known only from the type specimen and regarded as a synonym in relevant studies. After collected second times from the field, A. boissieri decided as a separate species. Furthermore, description, localities, distribution map and key of allied species are given. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) Die Wiederentdeckung von Achillea boissieriHausskn. ex Boiss. nach 140 Jahren Diese Arbeit beschreibt die taxonomische Entwicklung und die Verbreitung von Achillea boissieriHausskn. ex Boiss. in der Türkei, das nur durch den Typus-Beleg bekannt ist und in den diesbezüglichen Untersuchungen synonym geführt wird. Nachdem es während Felduntersuchungen ein zweites Mal gefunden wurde, war festzustellen, dass A. boissieri als getrennte Art bestehen bleiben muss. Ferner werden Beschreibung, Fundorte, Verbreitungskarte und ein Unterscheidungs-Schlüssel zu verwandten Arten vorgelegt. [source] Solidification of binary aqueous solution cooled from aboveHEAT TRANSFER - ASIAN RESEARCH (FORMERLY HEAT TRANSFER-JAPANESE RESEARCH), Issue 1 2010Shigeo Kimura Abstract Freezing and melting phenomena are important in many different fields, including crystal growth, casting, metallurgy, geophysics, and oceanography. Solidification of a multi-component solution is the one often observed in nature. In order to investigate basic features of the freezing processes of binary systems, we conducted a series of laboratory experiments in a rectangular box cooled from above using aqueous NaNO3 solution. During the freezing, the solid phase always grows into many needle-like crystals called the mushy layer. We measured the growth of the mushy layer thickness, the solid fraction, the temperature, and the concentration distributions. The average solid fraction is found to increase with time in the mushy layer. This causes a slow descent of the released solute in the mushy layer and its eventual fall into the liquid region below because of gravity. We propose a one-dimensional model to explain the horizontally-averaged mushy layer growth. In the model, the estimate of a heat flux at the mushy-liquid interface due to natural convection is found essential for a correct prediction. The proposed theory predicts well the growth of the mushy-layer and the average solid fraction, once the convective heat flux is properly given. © 2009 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.20278 [source] Kinetics of the thermal decomposition of bis(trifluoromethyl) peroxydicarbonate, CF3OC(O)OOC(O)OCF3INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, Issue 1 2003Maximiliano A. Burgos Paci Thermal decomposition of bis(trifluoromethyl) peroxydicarbonate has been studied. The mechanism of decomposition is a simple bond fission, homogeneous first-order process when the reaction is carried out in the presence of inert gases such as N2 or CO. An activation energy of 28.5 kcal mol,1 was determined for the temperature range of 50,90°C. Decomposition is accelerated by nitric oxide because of a chemical attack on the peroxide forming substances different from those formed with N2 or CO. An interpretation on the influence of the substituents in different peroxides on the OO bond is given. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 35: 15,19, 2003 [source] Study on battlespace ontology construction approachINTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS, Issue 12 2005Jun-feng Song In Network Centric Warfare, the sensor network's capability is much stronger than ever; the force can get a mass of information about battlespace in real or near-real time. How to utilize the information about battlespace effectively and transform the information superiority into knowledge superiority is a key problem for NCW research. To solve this problem, first we need to establish a suitable knowledge infrastructure. In this article, battlespace ontology is considered as the knowledge infrastructure of NCW, and we propose a battlespace ontology construction approach based on OWL, which consists of two parts: formal ontology construction approach to construct subdomain ontologies of battlespace and formal ontology integration approach to integrate subdomain ontologies of battlespace. Then a concrete application of the approach to an air combat battlespace is given. © 2005 Wiley Periodicals, Inc. Int J Int Syst 20: 1219,1231, 2005. [source] Density functional crystal orbital study of cyano-substituted poly(para -phenylene-vinylene) and poly(quinoxaline-vinylene)INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, Issue 8 2006F. Bartha Abstract We have calculated the optical and electronic properties of several conjugated organic polymers: poly(p -phenylene-vinylene) (PPV) and its derivatives. Cyano substitutions on the phenylene ring: poly(2,5-dicyano- p -phenylene-vinylene) (2,5-DCN-PPV) and on the vinylene linkage: poly(p -phenylene-7(,8)-(di)cyano-vinylene) are considered. In addition, poly(quinoxaline-vinylene) (PQV) is studied. The infinite isolated quasi-1D chains are treated with periodic boundary conditions, using atomic basis sets. In a comparative study of PPV, some issues regarding the selection of the functionals and basis sets are discussed and excitation energies derived from time-dependent and from ordinary methods are compared. It is concluded that for these polymers the calculations are informative at the B3LYP/6-31G** density functional theory (DFT) level. The absolute values might change with improved methods, but the similarity of the polymers suggests that the relative characterization is adequate. Band structures are communicated along with characteristics of the highest occupied and the lowest unoccupied crystal orbitals (HOCO and LUCO). Electron affinities, ionization potentials, valence and conduction bandwidths, and effective masses at the bandgap are given. © 2006 Wiley Periodicals, Inc. Int J Quantum Chem, 2006 [source] Using symbolic computing in building probabilistic models for atomsINTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, Issue 1 2006Silviu Guiasu Abstract This article shows how symbolic computing and the mathematical formalism induced by maximizing entropy and minimizing the mean deviation from statistical equilibrium may be effectively applied to obtaining probabilistic models for the structure of atoms, using trial wave functions compatible with an average shell picture of the atom. The objective is not only to recover the experimental value of the ground state mean energy of the atom, but rather to better approximate the unknown parameters of these trial functions and to calculate both correlations between electrons and the amount of interdependence among different subsets of electrons of the atoms. The examples and numerical results refer to the hydrogen, helium, lithium, and beryllium atoms. The main computer programs, using the symbolic computing software MATHEMATICA, are also given. © 2005 Wiley Periodicals, Inc. Int J Quantum Chem, 2006 [source] Model order reduction of linear and nonlinear 3D thermal finite-element description of microwave devices for circuit analysisINTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 5 2005Raphaël Sommet Abstract Electrothermal models of power devices are necessary for the accurate analysis of their performances. For this reason, this article deals with a methodology to obtain an electrothermal model based on a reduced model of a 3D thermal finite-element (FE) description for its thermal part and on pulsed electrical measurements for its electrical part. The reduced thermal model is based on the Ritz vector approach, which ensures a steady-state solution in every case. An equivalent SPICE subcircuit implementation for circuit simulation is proposed and discussed. An extension of the method to a nonlinear reduced model based on the Kirchoff transformation is also proposed. The complete models have been successfully implemented in circuit simulators for several HBT or PHEMT device structures. Many results concerning devices and circuits are presented, including simulation of both the static and dynamic collector-current collapse in HBTs due to the thermal phenomenon. Moreover, the results in terms of the circuit for an X-band high-power amplifier are also presented. As for the nonlinear approach, results concerning an homogeneous structure is given. © 2005 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2005. [source] Characterization of molecular orbitals by counting nodal regionsJOURNAL OF COMPUTATIONAL CHEMISTRY, Issue 4 2005Yasuyo Hatano Abstract The number of nodal regions can be used as an index for characterizing molecular orbitals. A computer program has been developed to count the number of nodal regions, based on the labeling and contraction algorithms. This program is applied to the water molecule, the hydrogen sulfide molecule, the hydrogen atomic orbitals, the Rydberg excited states of ethylene, dissociation of carbon monoxide, and CASSCF calculations of formaldehyde. Because the number of nodal regions is independent of the coordinate system, the method is applicable even when the molecular structure changes drastically as in bond rotation or bond elongation. Changes of nodal regions with bond elongation are investigated for carbon monoxide. A prescription for problems arising with basis set expansion techniques is also given. © 2005 Wiley Periodicals, Inc. J Comput Chem 26: 325,333, 2005 [source] Geometry optimization in density functional methodsJOURNAL OF COMPUTATIONAL CHEMISTRY, Issue 9 2004J. Ulises Reveles Abstract The geometry optimization in delocalized internal coordinates is discussed within the framework of the density functional theory program deMon. A new algorithm for the selection of primitive coordinates according to their contribution to the nonredundant coordinate space is presented. With this new selection algorithm the excessive increase in computational time and the deterioration of the performance of the geometry optimization for floppy molecules and systems with high average coordination numbers is avoided. A new step selection based on the Cartesian geometry change is introduced. It combines the trust radius and line search method. The structure of the new geometry optimizer is described. The influence of the SCF convergence criteria and the grid accuracy on the geometry optimization are discussed. A performance analysis of the new geometry optimizer using different start Hessian matrices, basis sets and grid accuracies is given. © 2004 Wiley Periodicals, Inc. J Comput Chem 25: 1109,1116, 2004 [source] Maximum acyclic and fragmented sets in regular graphsJOURNAL OF GRAPH THEORY, Issue 2 2008Penny Haxell Abstract We show that a typical d -regular graph G of order n does not contain an induced forest with around vertices, when n,,,d,,,1, this bound being best possible because of a result of Frieze and ,uczak [6]. We then deduce an affirmative answer to an open question of Edwards and Farr (see [4]) about fragmentability, which concerns large subgraphs with components of bounded size. An alternative, direct answer to the question is also given. © 2007 Wiley Periodicals, Inc. J Graph Theory 57: 149,156, 2008 [source] A new approach to describe high-pressure adsorption isotherms in subcritical and supercritical conditionsAICHE JOURNAL, Issue 7 2009Ch. Chilev Abstract In this article, we present a new approach to describe adsorption equilibrium of pure gases in a wide range of pressure. This approach is based on a simple statistical mechanics treatment combining the potential theory and lattice fluid models. The obtained equation for the calculation of the excess adsorption can predict the curve progression of isotherms defined by the IUPAC I classification, and for those at supercritical conditions. Notwithstanding that the basic idea of the developed equation is to adapt to the adsorption equilibrium in supercritical conditions at high pressure, the model correlates very well experimental data at low pressure in subcritical conditions. It is applicable to a wide range of pressures and fits satisfactorily the experimental data in a broad range of pressures and temperatures. In particular, the model predicts the maximum of excess adsorption and its minimum. A comparison between this approach and two others is given. © 2009 American Institute of Chemical Engineers AIChE J, 2009 [source] Step and pulse response methods for identification of wiener processesAICHE JOURNAL, Issue 2 2006Ho Cheol Park Abstract Lack of simple identification methods for nonlinear processes hinders field applications of nonlinear control systems. For identification methods that are as simple as those for the first order plus time delay models of linear dynamical processes, graphical and least squares methods to identify Wiener-type nonlinear processes from standard responses, such as step, pulse, and square-wave responses, are proposed. Static nonlinear functions are identified independently in Wiener-type nonlinear processes. Graphical methods extract discrete points of the nonlinear static function or a continuous non-parametric model of the nonlinear static function iteratively. The least squares method provides a parametric model of the nonlinear static function. The identified static nonlinear function can be used to design a simple linearizing control system. To illustrate the proposed identification methods, simulation and experimental results are given. © 2005 American Institute of Chemical Engineers AIChE J, 2006 [source] Pulsed dielectric barrier discharge reactor for diesel particulate matter removalAICHE JOURNAL, Issue 8 2004S. Yao Abstract A dielectric barrier discharge (DBD) reactor, driven by a pulsed corona surface discharge (PCSD), was developed for the removal of particulate matter (PM) in an undiluted exhaust gas of a diesel engine. The DBD reactor consisted mainly of alumina (Al2O3) plates and metal meshes covered on the surfaces of Al2O3 plates. The PCSD was carried out with a pulse power supply at atmospheric pressure and the temperature of exhaust gases. The energy efficiency for PM removal was 26.5 ,g/J at maximum and 1 ,g/J with 42% PM removal. The construction of the DBD reactor that promoted PM deposition on Al2O3 surfaces improved energy efficiency. The constants in PM removal model were given. © 2004 American Institute of Chemical Engineers AIChE J, 50: 1901,1907, 2004 [source] Diesel particulate matter and NOx removals using a pulsed corona surface dischargeAICHE JOURNAL, Issue 3 2004S. Yao Abstract A pulsed corona surface discharge (PCSD) system was established for particulate matter (PM) and NOx removals from a diesel engine. The PCSD was carried out with a dielectric barrier discharge (DBD) reactor and a pulse power supply at atmospheric pressure and room temperature. The DBD reactor consisted mainly of an alumina (Al2O3) tube and a stainless steel rod (cathode) inserted in the alumina tube, and an aluminum coil (anode) wound on the outside surface of the Al2O3 tube. Pulse voltage was applied to the outside Al coil and stainless steel rod. PM was removed at a rate of 89% at maximum with 40% NOx removal. Relations of pulse voltage and frequency to PM and NOx removals were investigated. PM was oxidized by NO2 and other kinds of active oxygen species, such as O and O3 from plasma discharges. A surface adsorption/desorption and PM oxidation model of PM removal was established. The kinetic equations and their constants were given. © 2004 American Institute of Chemical Engineers AIChE J, 50:715,721, 2004 [source] Grafting of maleic anhydride onto linear polyethylene: A Monte Carlo studyJOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 22 2004Yutian Zhu Abstract Monte Carlo simulation was used to study the graft of maleic anhydride (MAH) onto linear polyethylene (PE-g-MAH) initiated by dicumyl peroxide (DCP). Simulation results revealed that major MAH monomers attached onto PE chains as branched graft at higher MAH content. However, at extremely low MAH content, the fraction of bridged graft was very close to that of branched graft. This conclusion was somewhat different from the conventional viewpoint, namely, the fraction of bridged graft was always much lower than that of branched graft under any condition. Moreover, the results indicated that the grafting degree increased almost linearly to MAH and DCP concentrations. On the other hand, it was found that the amount of grafted MAH dropped sharply with increasing the length of grafted MAH, indicating that MAH monomers were mainly attached onto the PE chain as single MAH groups or very short oligomers. With respect to the crosslink of PE, the results showed that the fraction of PE-(MAH)n -PE crosslink structure increased continuously, and hence the fraction of PE-PE crosslink decreased with increasing MAH concentration. Finally, quantitative relationship among number average molecular weight of the PE, MAH, and DCP contents was given. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 5714,5724, 2004 [source] Trigonal Na3Li(MoO4)2·6H2O , a new many-phonon SRS molybdate crystal offering numerous nonlinear-laser interactions: several cascaded lasing (,(3),,(2)) effects and more than sesqui-octave Stokes and anti-Stokes comb generation under one-micron picosecond pumpingLASER PHYSICS LETTERS, Issue 5 2009A.A. Kaminskii Abstract Trigonal Na3Li(MoO4)2·6H2O was found to be an attractive, simultaneously ,(2) - and ,(3) -active nonlinear optical crystal. We investigated its basic optical properties and observed several nonlinear effects, namely many-phonon SRS, almost twooctave Stokes and anti-Stokes lasing combs, SHG, THG, and efficient cascaded (,(3),,(2))-generation, as well as SRS arising from nonlinear interaction of two different ,(3) -active vibrations. All recorded nonlinear-lasing components were identified and attributed to SRS-promoting vibration modes. A short review of nonlinear-laser molybdates is given. (© 2009 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA) [source] Tetragonal Ba2MgGe2O7 , a novel multifunctional optical crystal with numerous manifestations of nonlinear-laser effects: almost sesqui-octave Stokes and anti-Stokes combs and cascaded ,(3),,(2) lasing with involved second and third harmonic generationLASER PHYSICS LETTERS, Issue 12 2008A.A. Kaminskii Abstract Melilite-type Ba2MgGe2O7 was found to be an attractive, simultaneously ,(2) - and ,(3) -active nonlinear optical crystal. Under one-micron picosecond pumping we observed several manifestations of nonlinear interactions, namely almost sesqui-octave Stokes and anti-Stokes lasing combs, collinear and "Cherenkov"-type SHG, THG, SFG, and cascaded selfconversion ,(3),,(2) generation in the visible and UV range. All recorded lasing components were identified and attributed to a single SRS-promoting vibration mode ,SRS = 771.5 cm,1. A short review of melilite-type compounds is given. (© 2008 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA) [source] Stimulated Raman scattering and cascaded nonlinear laser (,(3) , ,(2)) effects in tetragonal non-centrosymmetric Li2B4O7 single crystalsLASER PHYSICS LETTERS, Issue 11 2006A. A. Kaminskii Abstract Multiple stimulated Raman scattering (SRS) and cascaded nonlinear ,(3) , ,(2) generation in tetragonal non-centrosymmetric Li2B4O7 crystal were observed under picosecond Nd3+:Y3Al5O12 laser excitation. All registered Stokes and anti-Stokes lasing components in the visible and near-IR were identified and attributed to the SRS-promoting vibration modes of the studied crystal. We classify the Li2B4O7 crystals as a promising media for up- and down-Raman laser-frequency converters. In the work a brief review of nonlinear-laser properties of SRSactive borate crystals is given. (© 2006 by Astro, Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA) [source] On the spectrum of a weak class of operator pencils of waveguide typeMATHEMATISCHE NACHRICHTEN, Issue 8 2006M. Hasanov Abstract The paper introduces a new class of two parameter non-overdamped operator pencils arising from evolution equations. We investigate spectral properties, including variational principles for "interior" points of the spectrum. Examples leading to pencils of the new class are given. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Generalization of a class of nonlinear averaging integral operatorsMATHEMATISCHE NACHRICHTEN, Issue 1-2 2005Teodor Bulboac Abstract Let H(U) be the space of all analytic functions in the unit disk U, and let coE denote the convex hull of the set E , ,. If K , H(U) then the operator I : K , H(U) is said to be an averaging operator if For a function h , A , H(U) we will determine simple sufficient conditions on h such that for all f , ,,1/,, where and ,,1/, represents the class of 1/, -convex functions (not necessarily normalized). As an application, we will give sufficient conditions on h to insure that the operators Ih;,,, are averaging operators on certain subsets of H(U), in order to generalize the result of [5]. In addition, some particular cases of this result obtained for appropriate choices of the function h will also be given. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] An adaptive spectroellipsometer for ecological monitoringMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 11 2009F. A. Mkrtchyan Abstract In this article, the creation of multichannel polarization optical instrumentation and the use of spectroellipsometric technology for the real-time ecological control of aquatic environment is discussed. It was shown that spectroellipsometric devices give high precision of measurements of water quality characteristics. Spectroellipsometric multichannel measurements in an aquatic environment are conducted by the algorithms for the recognition and identification of pollutants. Some results of an adaptive spectroellipsometer applications are given. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2792,2795, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24730 [source] Calculation of pattern in UTD method based on NURBS modeling with the source on surfaceMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 10 2007Wang Nan Abstract The UTD method with the source on convex surface which is usually used in the analysis and design of antennas especially conformal arrays on electrically large platforms is studied in this article where NURBS is introduced as way of modeling. Together with the information from ray-tracing done before, the calculation of fields is presented which includes direct field in the lit region and creeping ray field in the shadow region. The method can be applied to arbitrary electrically large targets and the usefulness can be seen in the examples given. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2492,2498, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22727 [source] Implementation of wave digital model in analysis of arbitrary nonuniform transmission linesMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 9 2007Biljana P. Sto Abstract An efficient method of analysis of nonuniform transmission lines (NTL), based on wave digital model composed of cascaded unit elements and two-port adaptors, is described. The proposed technique treats NTL as a cascade connection of equal-length or equal-delay uniform transmission lines. A simple algorithm for calculating transmission and input reflection coefficients is derived. Two application examples, proving the efficiency and response accuracy of the new technique, are given. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2150,2153, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22706 [source] Revision of the genus Germaria Robineau-Desvoidy (Diptera, Tachinidae) from Greece, with descriptions of two new speciesMITTEILUNGEN AUS DEM MUSEUM FUER NATURKUNDE IN BERLIN-DEUTSCHE ENTOMOLOGISCHE ZEITSCHRIFT, Issue 1 2010Joachim Ziegler Abstract The Greek species of the genus Germaria are revised. Two species are described as new to science: Germaria erecta sp. n. (Greek mainland) and G. neglecta sp. n. (Greek mainland and the island of Kefalonia). A lectotype is designated for Atractochaeta graeca Brauer & Bergenstamm, 1889. Germaria ruficeps (Fallén, 1820) is deleted from the list of Greek species. The presence of Germaria graeca (Brauer & Bergenstamm, 1889) is confirmed for Greece and this species is also recorded from Turkey and Iran for the first time. A key to the reviewed species is provided and their distribution data are given. (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Notes on the genus Santalus Lewis, 1906 and Pachylister Lewis, 1904, with the description of Nasaltus gen. n. (Coleoptera, Histeridae)MITTEILUNGEN AUS DEM MUSEUM FUER NATURKUNDE IN BERLIN-DEUTSCHE ENTOMOLOGISCHE ZEITSCHRIFT, Issue 1 2008awomir Mazur Abstract The taxonomical and systematic status of the species of Santalus was analyzed. A new genus, Nasaltus, has been described with Hister orientalis as the type-species. A new species is described Nasaltus marseuli (N. orientalis: Marseul). A new arrangement and catalogue of these species is proposed after their cladistic analysis. A key to identify the species of Nasaltus and Santalus is given. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] A review of the genus Monopis Hübner from China (Lepidoptera, Tineidae, Tineinae)MITTEILUNGEN AUS DEM MUSEUM FUER NATURKUNDE IN BERLIN-DEUTSCHE ENTOMOLOGISCHE ZEITSCHRIFT, Issue 2 2006Yunli Xiao Abstract Fifteen species of the genus Monopis Hübner are treated from China, including four new species (M. similartasyras sp. n., M. semorbiculata sp. n., M. trunciformis sp. n. and M. guangxiensis sp. n.) and five newly recorded species for China (M. laevigella (Denis & Schiffermüller), M. zagulajevi Gaedike, M. spilotella (Tengström), M. imella (Hübner) and M. pallidella Zagulajev). The female of M. trapezoides Petersen & Gaedike is reported for the first time. Photographs of the adults, wing venation and genital structures of the new species are provided. Key to all the known Chinese species is given. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] | ||||||||||||||||||||||||||||