Recent advances in rheometer design and rheology theory have led to an abundance of information, both experimental and theoretical. In response to this wonderful opportunity, many of the world's leading rheologist...
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ISBN:
(纸本)9781605603209
Recent advances in rheometer design and rheology theory have led to an abundance of information, both experimental and theoretical. In response to this wonderful opportunity, many of the world's leading rheologists have begun to share expert software codes with a global community of materials researchers and practitioners. This has led to the creation of a virtual environment for rheology (called "Rheo-Hub") in which students, researchers and practitioners analyze experimental data comprehensively, compare experiments with theory, directly explore theories by varying parameters in a wide parameter space, and derive results in the form of graphs, which are ideal for conducting quantitative comparisons and searching for dominant patterns. Explorations may be repeated in different ways (different expert codes may lead to alternative answers for the same research question) and viewed from different graphical viewpoints. Such easy access to advanced rheology is important, as it allows us to efficiently harness the large, rapidly growing technical knowledge base in rheology for the purpose of research and industrial innovation. Currently, hub technology for rheology is used in over 70 laboratories throughout the world, both industrially and academically. The technology is described in recent papers on cyber infrastructure by Winter and Mours (2006) and Winter (2007).
A self-assembly stacking on liquid-liquid interface of intercalated smectite silicates results in nematic structure and self-aligning nature, was revealed in this study. The stacking crystalline of polyoxypropylene am...
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We have shown that any pair potential function v(r) possessing a Fourier transform V(k) that is positive and has compact support at some finite wave number K yields classical disordered ground states for a broad densi...
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We have shown that any pair potential function v(r) possessing a Fourier transform V(k) that is positive and has compact support at some finite wave number K yields classical disordered ground states for a broad density range [R. D. Batten, F. H. Stillinger, and S. Torquato, J. Appl. Phys. 104, 033504 (2008)]. By tuning a constraint parameter χ (defined in the text), the ground states can traverse varying degrees of local order from fully disordered to crystalline ground states. Here, we show that in two dimensions, the “k-space overlap potential,” where V(k) is proportional to the intersection area between two disks of diameter K whose centers are separated by k, yields anomalous low-temperature behavior, which we attribute to the topography of the underlying energy landscape. At T=0, for the range of densities considered, we show that there is continuous energy degeneracy among Bravais-lattice configurations. The shear elastic constant of ground-state Bravais-lattice configurations vanishes. In the harmonic regime, a significant fraction of the normal modes for both amorphous and Bravais-lattice ground states have vanishing frequencies, indicating the lack of an internal restoring force. Using molecular-dynamics simulations, we observe negative thermal-expansion behavior at low temperatures, where upon heating at constant pressure, the system goes through a density maximum. For all temperatures, isothermal compression reduces the local structure of the system unlike typical single-component systems.
A novel strategy was developed In order to prepare monolayered polyaniline (PANI) submicrospheres on polymer substrates. The strategy involved two main steps, i.e., photografting of acrylate acid (AA) onto the surface...
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The methyl methacrylate(MMA)/1-propylmethacrylate-polyhedral oligomeric silsesquioxane(PM-POSS) copolymers were synthesized via atom transfer radical polymerization with CuBr as *** unreacted PM-POSS monomer could be ...
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The methyl methacrylate(MMA)/1-propylmethacrylate-polyhedral oligomeric silsesquioxane(PM-POSS) copolymers were synthesized via atom transfer radical polymerization with CuBr as *** unreacted PM-POSS monomer could be removed completely by washing the copolymerization product with *** copolymers were characterized with ~1H-NMR,X-ray diffraction,differential scanning calorimetry,thermogravimetric analysis and gel permeation *** increasing PM-POSS feed ratio,the total conversi...
Many physical and physiological signals exhibit complex scale-invariant features characterized by 1/f scaling and long-range power-law correlations, indicating a possibly common control mechanism. Specifically, it has...
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Many physical and physiological signals exhibit complex scale-invariant features characterized by 1/f scaling and long-range power-law correlations, indicating a possibly common control mechanism. Specifically, it has been suggested that dynamical processes, influenced by inputs and feedback on multiple time scales, may be sufficient to give rise to 1/f scaling and scale invariance. Two examples of physiologic signals that are the output of hierarchical multiscale physiologic systems under neural control are the human heartbeat and human gait. Here we show that while both cardiac interbeat interval and gait interstride interval time series under healthy conditions have comparable 1/f scaling, they still may belong to different complexity classes. Our analysis of the multifractal scaling exponents of the fluctuations in these two signals demonstrates that in contrast to the multifractal behavior found in healthy heartbeat dynamics, gait time series exhibit less complex, close to monofractal behavior. Further, we find strong anticorrelations in the sign and close to random behavior for the magnitude of gait fluctuations at short and intermediate time scales, in contrast to weak anticorrelations in the sign and strong positive correlation for the magnitude of heartbeat interval fluctuations—suggesting that the neural mechanisms of cardiac and gait control exhibit different linear and nonlinear features. These findings are of interest because they underscore the limitations of traditional two-point correlation methods in fully characterizing physiological and physical dynamics. In addition, these results suggest that different mechanisms of control may be responsible for varying levels of complexity observed in physiological systems under neural regulation and in physical systems that possess similar 1/f scaling.
The use of near-infrared plasmon resonance of gold nanorods (NR) to offer an integrated platform for multiplexed Raman detection and remote-controlled photothermal heating is analyzed. Surface enhanced Raman scatterin...
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The use of near-infrared plasmon resonance of gold nanorods (NR) to offer an integrated platform for multiplexed Raman detection and remote-controlled photothermal heating is analyzed. Surface enhanced Raman scattering (SERS)-coded NRs were efficiently detected following subcutaneous or intratumoral injection and enabled remote photothermal tumor heating to ablative temperatures. Cetyltrimethylammonium bromide (CTAB)-coated gold NRs were bought from Nanopartz with a peak plasmon resonance at 790 nm. NRs were purified further with multiple rounds of centrifugation using molecular weight cutoff centrifugal filters and stored at 200 pm at 4C. The SERS intensities of NRs coated with different dyes were compared using ethanol as an internal standard. The best NRs were selected by comparing the peak height ratio of the dye's most intense SERS peak to the peak height of the ethanol vibration at 879 cm-1 used as an internal standard.
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