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Chaos : Synchronization-based scalability of complex clustered net...

By: Xiaojuan Ma, Liang Huang, Ying-Cheng Lai, Yan Wang, and Zhigang Zheng

Description: Complex clustered networks arise in biological, social, physical, and technological systems, and the synchronous dynamics on such networks have attracted recent interests. Here we investigate system-size dependence of the synchronizability of these networks. Theoretical analysis and numerical computations reveal that, for a typical clustered network, as its size is increased, the synchronizability can be maintained or even enhanced but at the expense of dete...

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Chaos : Dynamical parameter identification from a scalar time series

By: Dongchuan Yu and Fang Liu

Description: If a drive system with unknown parameters represents “reality” and the response system a “computational model,” the unidirectional coupling can be used to change model parameters, as well as the model state, such that both systems synchronize with each other and model parameters coincide with their true values of “reality.” Such a parameter identification method is called adaptive synchronization (also autosynchronization) method and is widely used in the li...

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Biblioteca Hispanica : Elements of Natural History Book Written fo...

By: Gabriel Corbella
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Applied Physics Letters : Depth-resolved holographic optical coher...

By: M. Salvador, J. Prauzner, S. Köber, K. Meerholz, K. Jeong et al

Description: We present coherence-gated holographic imaging using a highly sensitive photorefractive PR polymer composite as the recording medium. Due to the high sensitivity of the composite holographic recording at intensities as low as 5 mW/cm2 allowed for a frame exposure time of only 500 ms. Motivated by regenerative medical applications, we demonstrate optical depth sectioning of a polymer foam for use as a cell culture matrix. An axial resolution of 18 m and a ...

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Journal of Applied Physics : CoCrPt-oxide based perpendicular reco...

By: S. N. Piramanayagam, K. Srinivasan, R. Sbiaa, Yan Dong, and R. H. Victora

Description: Writability of magnetic recording media with high anisotropy constant (Ku) is one of the major challenges encountered in extremely high density recording. A possible avenue to improve writability in perpendicular magnetic recording is to reduce the spacing between the writing head and the soft magnetic underlayer (SUL) or head-to-keeper spacing (HKS). A hybrid layer structure for reducing the HKS between the SUL and the writing head is investigated. The prop...

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The Journal of Chemical Physics : Spontaneous charging and crystal...

By: Joost de Graaf, Jos Zwanikken, Markus Bier, Arjen Baarsma, Yasha Oloumi et al

Description: We study the spontaneous charging and the crystallization of spherical micron-sized water droplets dispersed in oil by numerically solving, within a Poisson–Boltzmann theory in the geometry of a spherical cell, for the density profiles of the cations and anions in the system. We take into account screening, ionic Born self-energy differences between oil and water, and partitioning of ions over the two media. We find that the surface charge density of the dro...

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Applied Physics Letters : Growth and magnetic control of twinning ...

By: C. A. Jenkins, R. Ramesh, M. Huth, T. Eichhorn, P. Pörsch et al

Description: Twin structure engineering in sputtered films close to the Heusler stoichiometry Ni2MnGa (001) is used to demonstrate temperature and magnetic control of the phase transformation behavior. A custom heating apparatus integrated with a commercial microscope allows the observation of the austenite-martensite transition in epitaxially clamped films. Intermartensitic twin boundaries on cantilevers released from the epitaxial strain by focused ion beam etching are...

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Journal of Applied Physics : Suppressing random dopant-induced flu...

By: Petru Andrei and Liviu Oniciuc

Description: This article introduces a robust and computationally efficient technique for the design of fluctuation-resistant structures (fault-tolerant) semiconductor devices. This technique can be applied to the computation of the doping profiles that minimize the intrinsic variations in various parameters induced by random dopant fluctuations. The technique is based on the evaluation of doping sensitivity functions, which are defined as elements of the space adjoint t...

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Biblioteca Hispanica : Outline Geographical and Natural History of...

By: Ramon Jordana and Morera
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Applied Physics Letters : High performance ambient processed inver...

By: Steven K. Hau, Hin-Lap Yip, Hong Ma, and Alex K.-Y. Jen

Description: The performance of inverted bulk-heterojunction solar cells with zinc oxide nanoparticles as the electron selective contact is compared to those modified with a fullerene self-assembled monolayer (C60-SAM). The devices modified with a C60-SAM show very significant improvement in conversion efficiencies compared to unmodified devices leading to efficiencies as high as 4.9%. This is due to enhanced electronic coupling of the inorganic/organic interface from th...

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Applied Physics Letters : Transmission electron microscopic study ...

By: Saurabh Tripathi, N. P. Lalla, and Dhananjai Pandey

Description: The recently reported structure of the long period modulated phase of (1−x)NaNbO3–xCaTiO3, with x = 0.16, has been revisited using transmission electron microscopic studies. It is shown that the dominant phase in the morphotropic phase boundary region of this mixed system is incommensurately modulated in the [001] direction with an approximate unit cell size of 2ap×2ap×24ap, where ap is the pseudoperovskite cell parameter.

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Journal of Applied Physics : Composition dependence of electronic ...

By: G. He, L. D. Zhang, G. W. Meng, G. H. Li, G. T. Fei et al.

Description: Composition-dependent electronic structure and optical properties of Hf1−xSixOy (0.1 ≤ x ≤ 0.6) gate dielectrics on Si at 450 °C grown by UV-photo-induced chemical vapor deposition (UV-CVD) have been investigated via x-ray photoemission spectroscopy and spectroscopy ellipsometry (SE). By means of the chemical shifts in the Hf 4f, Si 2p, and O 1s spectra, the Hf–O–Si bondings in the as-deposited films have been confirmed. Analyses of composition-dependent ban...

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Physics of Plasmas : Solitary inertial Alfvén waves in dusty plasmas

By: S. Mahmood and H. Saleem

Description: Linear and nonlinear inertial Alfvén waves are studied in the presence of positively and negatively charged dust in electron-ion plasmas. The Sagdeev potential approach is employed to obtain solitary inertial Alfvén waves in such a multicomponent plasma. It is found that electron density dips are formed in the super Alfvénic region, which has behavior similar to the case of electron-ion plasmas. The amplitude of the electron density dip structure is decrease...

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Biblioteca Hispanica : Mechanical Applied to Constructions 1894

By: Marva Joseph Mayer

Description: Applied Mechanics

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Journal of Applied Physics : Ferromagnetic Cu doped ZnO as an elec...

By: T. S. Herng, S. P. Lau, S. F. Yu, S. H. Tsang, K. S. Teng et al

Description: Ferromagnetic and highly conductive copper doped ZnO (ZnO:Cu) films were prepared by filtered cathodic vacuum arc technique. By employing a biasing technique during growth, the electron concentration and resistivity of the ZnO:Cu films can be as high as 1020 cm−3 and 5.2×10−3 Ω cm, respectively. The ferromagnetic behavior is observed in all the conductive films, but its magnetization is quenched with an increment in carrier concentration, suggesting that car...

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Journal of Applied Physics : Spectroscopic characterization of las...

By: Nek M. Shaikh, Sarwat Hafeez, M. A. Kalyar, R. Ali, and M. A. Baig

Description: We present optical emission studies of the laser ablation brass plasma generated by the fundamental, second, and third harmonics of a neodymium doped yttrium aluminum garnet laser. The spectra predominantly reveal the spectral lines of the neutral and singly ionized copper and zinc. The excitation temperatures are determined by the Boltzmann plot method, whereas the electron number densities have been extracted from the Stark broadened line profiles. The spa...

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The Journal of Chemical Physics : The multiconfigurational-referen...

By: Jirí Czernek and Oldrich Živný

Description: The multiconfigurational-reference internally contracted configuration interaction (MRCI)/aug-cc-pVQZ-based computational protocol was employed to search for the minima of the potential energy surface of the low-lying singlet and triplet electronic states of the trifluoride anion F3− in the D∞h, C∞v, C2v, and Cs symmetry groups. The 2 bound state was located (re = 1.8777 Å and θ = 103.39°), which was predicted to lie less than 1 eV above the X g+ ground stat...

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Applied Physics Letters : Reduced hole mobility due to the presenc...

By: J. Y. Song, N. Stingelin, W. P. Gillin, and T. Kreouzis

Description: The hole mobility in poly-(3-hexylthiophene) samples is measured by the dark injection transient technique in both hole only and ambipolar devices. By applying a small offset bias prior to the voltage step, electronic excited states are generated in the ambipolar but not in the hole only devices. The presence of excited states reduces the room temperature hole mobility (typically 5×10−5 cm2 V−1 s−1) by as much as 15% compared to that measured without offset,...

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Journal of Applied Physics : Erratum: Frequency response of cantil...

By: Cornelis A. Van Eysden and John E. Sader

Description:

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Biblioteca Hispanica : Programme-summary of Natural History Items

By: Manuel Mir and Navarro
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