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  • 1
    Language: English
    In: Science (New York, N.Y.), 07 February 2014, Vol.343(6171), pp.629-31
    Description: A fundamental open problem in condensed-matter physics is how the dichotomy between conventional and topological band insulators is modified in the presence of strong electron interactions. We show that there are six interacting electronic topological insulators that have no noninteracting counterpart. Combined with the previously known band insulators, these produce a total of eight topologically distinct phases. Two of the six interacting topological insulators can be described as Mott insulators in which the electron spins form spin analogs of the topological band insulator. The remaining phases are obtained as combinations of these two "topological paramagnets" and the topological band insulator. We prove that these eight phases form a complete list of all possible interacting topological insulators and discuss their experimental signatures.
    Keywords: Topology -- Research ; Electrical Insulators -- Properties ; Condensed Matter Physics -- Research ; Physics Research;
    ISSN: 00368075
    E-ISSN: 1095-9203
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  • 2
    Language: English
    In: California Management Review, May 2013, Vol.55(3), pp.60-86
    Description: Proponents of the Conscious Capitalism (CC) movement claim that CC firms should demonstrate a lower gross margin, a higher profit margin, a lower SG&A, and a lower marketing expense than their non-CC comparable firms. Using a sample of industry-year-size matched control firms as the CC firms' benchmark, this article shows that empirical evidence largely disagrees with these conjectures. It further shows that in contrast to the implications of the CC movement, CC firms neither demonstrated superior stock performance relative to the S&P 500 in recent years, nor do they respond less to the pressures from the equity market.
    Keywords: Conscious Capitalism ; Corporate Social Responsibility ; Stakeholder Orientation ; Business
    ISSN: 0008-1256
    E-ISSN: 2162-8564
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  • 3
    Language: English
    In: California Management Review, May 2013, Vol.55(3), pp.97-106
    Description: This note is a response to Rajendra Sisodia's commentary on my article on the topic of Conscious Capitalism (in this issue of California Management Review). First, it raises new concerns based on Sisodia's commentary and challenges the scientific status of the Conscious Capitalism theory. It focuses on refutability, consistency, and generality, as these three characteristics are essential features of any scientific theory. Second, it responds to Sisodia's various comments.
    Keywords: Conscious Capitalism ; Refutability ; Consistency ; Generality ; Business
    ISSN: 0008-1256
    E-ISSN: 2162-8564
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  • 4
    Language: English
    In: Journal of Financial Economics, October 2012, Vol.106(1), pp.1-23
    Description: We develop an incomplete-markets -theoretic model to study entrepreneurship dynamics. Precautionary motive, borrowing constraints, and capital illiquidity lead to underinvestment, conservative debt use, under-consumption, and less risky portfolio allocation. The endogenous liquid wealth-illiquid capital ratio measures time-varying financial constraint. The option to accumulate wealth before entry is critical for entrepreneurship. Flexible exit option is important for risk management purposes. Investment increases and the private marginal value of liquidity decreases as decreases and exit becomes more likely, contrary to predictions of standard financial constraint models. We show that the idiosyncratic risk premium is quantitatively significant, especially for low .
    Keywords: Idiosyncratic Risk Premium ; Q Theory of Investment ; Liquidity Constraints ; Precautionary Saving ; Capital Illiquidity ; Business ; Economics
    ISSN: 0304-405X
    E-ISSN: 1879-2774
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  • 5
    Language: English
    In: Journal of Biomechanics, 30 April 2012, Vol.45(7), pp.1212-1218
    Description: Atherosclerotic plaques localize to regions of flow disturbance, i.e. bifurcations, branch points and regions of high curvature. Shear stress in these regions can be multi-directional due to complex flow patterns such as time-varying vortices. However, commonly used flow models are incapable of changing flow orientation to any direction other than the reverse. We have developed a novel flow system to enable changes in flow direction to any angle. When cells were pre-aligned in laminar shear, and then rotated 90°, cells re-aligned over 24 h. Re-alignment involved actin remodeling by gradual rotation of actin stress fibers. This device will enable that analysis of how endothelial cells sense changes in flow direction as occur .
    Keywords: Parallel Plate Device ; Shear Stress ; Endothelial Cells ; Mechanotransduction ; Cell Alignment ; Medicine ; Engineering ; Anatomy & Physiology
    ISSN: 0021-9290
    E-ISSN: 1873-2380
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  • 6
    Language: English
    In: Materials Letters, Feb 1, 2012, Vol.68, p.209(3)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.matlet.2011.10.077 Byline: Chong Wang, Feifei Wang, Cheng Ren Keywords: Nanocrystalline materials; Electrical properties Abstract: Fe.sub.2O.sub.3 nanorods were synthesized in large scale by a typical surfactant-free hydrothermal method. The electrical property of a single nanorod was investigated between two gold nanoelectrodes. Nonlinear I-V curves were got under different temperatures and pressures respectively as the bias ranged from -3V to 3V. Such a nonlinear electrical behavior was attributed to the existence of barriers. And the barrier height was estimated to be 0.13eV by linear fitting ln(I/T.sup.2) and (-1/kT). The effect of oxygen pressure to the conductance is due to the conversion from depletion layer to inversion layer caused by the oxygen-controlled surface potential as well as the small size of the nanorods. Article History: Received 29 September 2011; Accepted 21 October 2011
    ISSN: 0167-577X
    Source: Cengage Learning, Inc.
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  • 7
    Language: English
    In: Physical Review B, 6/2015, Vol.91(24)
    Description: We propose a simple theoretical construction of certain short-range entangled phases of interacting fermions, by putting the bound states of three fermions (which we refer to as clustons) into topological bands. We give examples in two and three dimensions, and show that they are distinct from any free fermion state. We further argue that these states can be viewed as combinations of certain free fermion topological states and bosonic symmetry-protected topological (SPT) states. This provides a conceptually simple understanding of various SPT phases, and the possibility of realizing them in cold atom systems. New parton constructions of these SPT phases in purely bosonic systems are proposed. We also discuss a related anomaly in two dimensional Dirac theories, which is the gravitational analogue of the parity anomaly. Comment: 4+4 pages, 3 figures
    Keywords: Condensed Matter - Strongly Correlated Electrons ; Condensed Matter - Quantum Gases ; High Energy Physics - Theory;
    ISSN: 1098-0121
    E-ISSN: 1550-235X
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  • 8
    Language: English
    In: Electrochimica Acta, March 1, 2013, Vol.92, p.356(9)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.electacta.2013.01.064 Byline: Chong Wang, Jinqiu Zhang, Peixia Yang, Maozhong An Keywords: Through-hole electroplating; Leveler; Cathodic polarization; Quantum chemical calculations Abstract: a* Using Safranine T as a comparison to study the mechanism of JGB in the through-hole electroplating. a* Quantum chemical calculation is employed to analysis electronic properties and orbital information of levelers in the present paper. a* Finding out the probable reactive site for the adsorption of JGB on the copper surface. a* Offering some theoretical information to design and synthesize new additives for electroplating. Author Affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China Article History: Received 7 December 2012; Revised 3 January 2013; Accepted 11 January 2013
    Keywords: Mutual Fund Industry -- Analysis ; Adsorption -- Analysis ; Electrochemical Reactions -- Analysis ; Copper (Metal) -- Analysis
    ISSN: 0013-4686
    Source: Cengage Learning, Inc.
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  • 9
    Language: English
    In: Electrochimica Acta, August 30, 2013, Vol.105, p.462(6)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.electacta.2013.05.019 Byline: Minghao Wu, Jian Chen, Chong Wang, Fuqing Wang, Baolian Yi Abstract: Non-graphitic carbon nanotubes (NGCNTs) are successfully prepared by carbonization of polypyrrole (PPy) nanotubes precursor synthesized via a self-assembly process. It is observed from transmission electron microscopy (TEM) that the diameter and length of the NGCNTs are 100-200nm and 2-10[mu]m, respectively. The electrochemical performances of the NGCNTs are evaluated by cyclic voltammograms and galvanostatic discharge-charge cycling. The results show that NGCNTs deliver an initial reversible capacity of 635.7mAhg.sup.-1 at current density of 100mAg.sup.-1 with a high capacity retention ratio of 85.7% after 150 cycles. Even up to 4Ag.sup.-1, the reversible capacity of NGCNTs remains in 280.1mAhg.sup.-1. The improved performance of NGCNTs is attributed to the non-graphitic form, tubular morphology and cross-linked conducting networks. Therefore, it is a potential anode material for lithium-ion battery. Author Affiliation: (a) Laboratory of Advanced Rechargeable Batteries, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023, China (b) Graduate University of the Chinese Academy of Sciences, Beijing 100039, China Article History: Received 6 February 2013; Revised 3 May 2013; Accepted 4 May 2013
    Keywords: Electrochemistry ; Batteries ; Nanotubes
    ISSN: 0013-4686
    Source: Cengage Learning, Inc.
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  • 10
    Language: English
    In: Materials Letters, 01 May 2017, Vol.194, pp.38-41
    Description: Due to the high thermal resistance property and low moisture absorption, bismaleimide (BMI) resin has gained great interests in aerospace industries. However, materials made of pure BMI resin often encounter high brittleness and relatively low mechanical strength. In this investigation, N-phenyl maleimide (N-PMI) functional groups were grafted to acidified multi-walled CNTs (MWNT-COOH) to form MWNT-N-PMI through a series of grafting including the Michael addition reaction. MWNT-N-PMI can be uniformly dispersed in BMI/allyl bisphenol A (BMI-BA) resins only with a hand stirring. The addition of N-PMI-MWNT enhanced the reaction activity of BMI-BA resin and mechanical properties of N-PMI-MWNT/BMI-BA composites was significantly higher than that of BMI-BA reinforced by MWNT-COOH.
    Keywords: Multi-Walled Carbon Nanotube ; Bismaleimide ; Dispersion ; Mechanical Strength ; Engineering ; Physics
    ISSN: 0167-577X
    E-ISSN: 1873-4979
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