document

Halofunctionalization of alkenes by vanadium chloroperoxidase from Curvularia inaequalis

Dong, J. (author), Fernandez Fueyo, E. (author), Li, Jingbo (author), Guo, Zheng (author), Renirie, Rokus (author), Wever, Ron (author), Hollmann, F. (author)

The vanadium-dependent chloroperoxidase from Curvularia inaequalis is a stable and efficient biocatalyst for the hydroxyhalogenation of a broad range of alkenes into halohydrins. Up to 1 200 000 TON with 69 s−1 TOF were observed for the biocatalyst. A bienzymatic cascade to yield epoxides as reaction products is presented.

journal article 2017

document

Characterization and comparison of capillary pore structures of digital cement pastes

Dong, H. (author), Gao, P. (author), Ye, G. (author)

More and more studies are based on digital microstructures of cement pastes obtained either by numerical modelling or by experiments. A comprehensive understanding of the their pore structures, therefore, becomes significant. In this study, the pore structure of a virtual cement paste (HYMO-1d) generated by cement hydration model HYMOSTRUC 3D...

journal article 2017

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Electrochemical reduction of CO₂ on compositionally variant Au-Pt bimetallic thin films

Ma, M. (author), Hansen, Heine A. (author), Valenti, M. (author), Wang, Zegao (author), Cao, A. (author), Dong, Mingdong (author), Smith, W.A. (author)

The electrocatalytic reduction of CO₂ on Au-Pt bimetallic catalysts with different compositions was evaluated, offering a platform for uncovering the correlation between the catalytic activity and the surface composition of bimetallic electrocatalysts. The Au-Pt alloy films were synthesized by a magnetron sputtering co-deposition...

journal article 2017

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Fast ℓ₁-regularized space-Time adaptive processing using alternating direction method of multipliers

Qin, Lilong (author), Wu, Manqing (author), Wang, X. (author), Dong, Zhen (author)

Motivated by the sparsity of filter coefficients in full-dimension space-Time adaptive processing (STAP) algorithms, this paper proposes a fast ℓ1-regularized STAP algorithm based on the alternating direction method of multipliers to accelerate the convergence and reduce the calculations. The proposed algorithm uses a splitting variable to...

journal article 2017

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Identification and Robust Control of the Nonlinear Photoelectrothermal Dynamics of LED Systems

Dong, J. (author), Zhang, Kouchi (author)

In lighting systems consisting light-emitting diodes (LEDs), excessive temperature is a main cause of degraded luminous efficacy, which leads to reduced average illuminance and distorted illumination rendering. Modeling the thermal dynamics of LEDs is hence essential in designing thermal dissipators and controllers for maintaining constant...

journal article 2017

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High resolution soil moisture mapping using distributed temperature sensing: A data assimilation framework

Dong, J. (author)

doctoral thesis 2016

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Mapping high-resolution soil moisture and properties using distributed temperature sensing data and an adaptive particle batch smoother

Dong, J. (author), Steele-Dunne, S.C. (author), Ochsner, Tyson E. (author), Hatch, Christine E. (author), Sayde, Chadi (author), Selker, J.S. (author), Tyler, Scott (author), Cosh, Michael H. (author), van de Giesen, N.C. (author)

This study demonstrated a new method for mapping high-resolution (spatial: 1 m, and temporal: 1 h) soil moisture by assimilating distributed temperature sensing (DTS) observed soil temperatures at intermediate scales. In order to provide robust soil moisture and property estimates, we first proposed an adaptive particle batch smoother...

journal article 2016

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System in package for intelligent lighting and sensing applications

Dong, M. (author)

As we enter era of “intelligence”, an increasing number of smart devices are being equipped around us. Such devices reflect the emerging need in microelectronics industry: increased functionality and miniaturization. As Moore’s law gradually meets its bottleneck, the concept of “More-than-Moore” (MtM) is proposed to address this issue by...

doctoral thesis 2016

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Determining soil moisture and soil properties in vegetated areas by assimilating soil temperatures

Dong, J. (author), Steele-Dunne, S.C. (author), Ochsner, Tyson E. (author), van de Giesen, N.C. (author)

This study addresses two critical barriers to the use of Passive Distributed Temperature Sensing (DTS) for large-scale, high-resolution monitoring of soil moisture. In recent research, a particle batch smoother (PBS) was developed to assimilate sequences of temperature data at two depths into Hydrus-1D to estimate soil moisture as well as...

journal article 2016

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The soil moisture active passive marena, Oklahoma, in situ sensor testbed (SMAP-MOISST): Testbed design and evaluation of in situ sensors

Cosh, Michael H. (author), Ochsner, Tyson E. (author), McKee, Lynn (author), Dong, Jingnuo (author), Basara, Jeffrey B. (author), Evett, Steven R. (author), Hatch, Christine E. (author), Small, Eric E. (author), Steele-Dunne, S.C. (author), Zreda, Marek (author), Sayde, Chadi (author)

In situ soil moisture monitoring networks are critical to the development of soil moisture remote sensing missions as well as agricultural and environmental management, weather forecasting, and many other endeavors. These in situ networks utilize a variety of sensors and installation practices, which confounds the development of a unified...

journal article 2016

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Enhanced Optical Performance of BaMgAl₁₀O₁₇: Eu²⁺ Phosphor by a Novel Method of Carbon Coating

Yin, L.J. (author), Dong, Juntao (author), Wang, Yinping (author), Zhang, Bi (author), Zhou, Zheng Yang (author), Jian, Xian (author), Wu, Mengqiang (author), Xu, Xin (author), van Ommen, J.R. (author), Hintzen, H.T.J.M. (author)

Many strategies have been adopted to improve thermal degradation of phosphors. Because of the stability and high transmittance of graphene, here we report a novel method of carbon coating on BaMgAl₁₀O₁₇:Eu²⁺ (BAM) phosphor particles through chemical vapor deposition. The chemical composition, microstructure,...

journal article 2016

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Electronic structure and site occupancy of lanthanide-doped (Sr, ca)₃(Y, lu)₂Ge₃O₁₂ garnets: A spectroscopic and first-principles study

Luo, H. (author), Ning, Lixin (author), Dong, Yuanyuan (author), bos, A.J.J. (author), Dorenbos, P. (author)

Photoluminescence excitation (PLE) and emission spectra (PL) of undoped (Sr, Ca)₃(Y, Lu)₂Ge₃O₁₂ as well as Eu³⁺- and Ce³⁺-doped samples have been investigated. The PL spectra show that Eu³⁺ enters into both dodecahedral (Ca, Sr) and octahedral (Y, Lu) sites. Ce<sup>3...

journal article 2016

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A rapid method of estimating the solar irradiance spectra with potential lighting applications

Gao, Y. (author), Dong, J. (author), Isabella, O. (author), Zeman, M. (author), Zhang, G (author)

Diverse solar irradiance spectra can be observed under different conditions of time, date, location, weather, etc. Since the solar irradiance spectrum is required by certain scientific and engineering applications, obtaining accurate spectral data is essential. Measurements by spectrophotometers are able to achieve accurate real-time data with...

conference paper 2016

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Estimating surface turbulent heat fluxes from land surface temperature and soil moisture observations using the particle batch smoother

Lu, Y. (author), Dong, J. (author), Steele-Dunne, S.C. (author), van de Giesen, N.C. (author)

Surface heat fluxes interact with the overlying atmosphere and play a crucial role in meteorology, hydrology, and climate change studies, but in situ observations are costly and difficult. It has been demonstrated that surface heat fluxes can be estimated from assimilation of land surface temperature (LST). One approach is to estimate a neutral...

journal article 2016

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Acoustic radiation due to scattering of T-S wave by the mean-flow distortion induced by steady local suction

Substantial sound waves can be generated by boundary-layer instability modes when the latter are scattered by a rapid mean-flow distortion. This is a rather generic mechanism and operates when an oncoming T-S wave is scattered by a steady local suction slot. This paper focuses on this problem by extending a recently developed Local Scattering...

conference paper 2015

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Detached coherent structures in channel revisited: Comparison with homogeneous shear turbulence

Coherent structures in statistically-stationary homogeneous shear turbulence (HST) are compared with those of the detached family in channels. Similarly to attached ones, detached Qs in channels form streamwise trains of side-by-side groups of a Q2 and a Q4. This is also true in HST. Contrary to attached structures, but similarly to those in HST...

conference paper 2015

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A novel capsule-based selfrecovery system with a chloride ion trigger

Xiong, W. (author), Tang, J. (author), Zhu, G. (author), Han, N. (author), Schlangen, E. (author), Dong, B. (author), Wang, X. (author), Xing, F. (author)

Steel is prone to corrosion induced by chloride ions, which is a serious threat to reinforced concrete structures, especially in marine environments. In this work, we report a novel capsule-based selfrecovery system that utilizes chloride ions as a trigger. These capsules, which are functionalized via a smart response to chloride ions, are...

journal article 2015

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A Particle Batch Smoother for soil moisture determination by assimilating soil temperatures

Dong, J. (author), Dunne, S.C. (author), Van de Giesen, N.C. (author)

journal article 2015

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Micromechanical study of the interface properties in concrete repair systems

Lukovic, M. (author), Savija, B. (author), Dong, H. (author), Schlangen, E. (author), Ye, G. (author)

journal article 2014

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Soil moisture estimation by passive distributed temperature sensing (DTS) using data assimilation

Dong, J. (author), Steele-Dunne, S.C. (author), Van de Giesen, N.C. (author)

journal article 2014