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Simpler Mass Production of Polymeric Visual Decoys for the Male Emerald Ash Borer （Agrilusplanipennis）

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Journal of Bionic Engineering 2015年第2期12卷 263-269页

作者： Tarun Gupta stephen E. Swiontek Akhlesh Lakhtakia Department of lndustrial and Manufacturing Engineering Western Michigan University Kalamazoo Michigan 49008 USA Department of Engineering Seience & Mechanics Pennsylvania State University Univelitv Park Pennwlvania 16802 USA

Polymeric visual decoys of beetle of an invasive species called the Emerald Ash Borer （EAB）, Agrilus planipennis, are highly efficacious in luring and trapping EAB males. Although industrially scalable, the bioreplication process to t）tbricate these decoys involves several operational steps. In a simpler bioreplication process devised by us, a multi-cavity negative die of nickel is made from an array of several EAB females. This die is used to fabricate multiple decoys simultaneously by casting and ihermal curing of poly（dimethyl siloxane）. Finally, the decoys are sprayed by first a black paint and then a metallic green paint. The new bioreplication process has considerably fewer operational steps than its predecessor and can be adopted by industry.

关键词： artificial visual decoy bioreplication Confomlal-Evaporated-Film-by-Rotation (CEFR) method electroforming,Emerald Ash Borer negative die

Populations with individual variation in dispersal in heterogeneous environments: Dynamics and competition with simply diffusing populations

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Science China Mathematics 2020年第3期63卷 441-464页

作者： Robert stephen Cantrell Chris Cosner Xiao Yu Department of Mathematics University of MiamiCoral GablesFL 33146USA School of Mathematical Sciences South China Normal UniversityGuangzhou 510631China

We consider a model for a population in a heterogeneous environment, with logistic-type local population dynamics, under the assumption that individuals can switch between two different nonzero rates of diffusion. Such switching behavior has been observed in some natural systems. We study how environmental heterogeneity and the rates of switching and diffusion affect the persistence of the population. The reactiondiffusion systems in the models can be cooperative at some population densities and competitive at others. The results extend our previous work on similar models in homogeneous environments. We also consider competition between two populations that are ecologically identical, but where one population diffuses at a fixed rate and the other switches between two different diffusion rates. The motivation for that is to gain insight into when switching might be advantageous versus diffusing at a fixed rate. This is a variation on the classical results for ecologically identical competitors with differing fixed diffusion rates, where it is well known that "the slower diffuser wins".

关键词： reaction-diffusion ecology and evolutionary biology population dynamics animal behavior individual variation in dispersal evolution of dispersal

The origin of the lattice thermal conductivity enhancement at the ferroelectric phase transition in GeTe

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npj Computational Materials 2021年第1期7卷 529-536页

作者： Đorđe Dangić Olle Hellman stephen Fahy Ivana Savić Department of Physics University College CorkCorkIreland Tyndall National Institute CorkIreland Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköpingSweden

The proximity to structural phase transitions in IV-VI thermoelectric materials is one of the main reasons for their large phonon anharmonicity and intrinsically low lattice thermal conductivityκ.However,theκof GeTe increases at the ferroelectric phase transition near 700 *** first-principles calculations with the temperature dependent effective potential method,we show that this rise inκis the consequence of negative thermal expansion in the rhombohedral phase and increase in the phonon lifetimes in the high-symmetry *** anharmonicity near the phase transition induces non-Lorentzian shapes of the phonon power *** account for these effects,we implement a method of calculatingκbased on the Green-Kubo approach and find that the Boltzmann transport equation underestimatesκnear the phase *** findings elucidate the influence of structural phase transitions onκand provide guidance for design of better thermoelectric materials.

关键词： phase transition ferroelectric

A Novel Framework for Object-Based Coding and Compression of Hyperspectral Imagery

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Chinese Journal of Electronics 2015年第2期24卷 300-305页

作者： ZHAO Chunhui LI Xiaohui REN Jinchang stephen Marshall College of Information and Communication Engineering Harbin Engineering University Department of Electronic and Electrical Engineering University of Strathclyde

A novel object-based framework is proposed for HSI compression, where targets of interest are extracted and separately coded. With objects removed,the holes are filled with the background average to form a new but more homogenous background for better compression. An improved sparse representation with adaptive spatial support is proposed for target detection. By applying the proposed framework to 2D/3D DCT approaches,reconstructed images from conventional and proposed approaches are compared. Six criteria in three groups are employed for quantitative evaluations to measure the degree of data reduction, the distortion of reconstructed image quality and accuracy in target detection, respectively. Comprehensive experiments on two datasets are used for performance evaluation. It is found that the proposed approaches yield much improved results.

关键词： Hyperspectral imagery(HSI) Objectbased image compression Sparse representation Target detection Remote sensing

Void fill and support techniques to stabilize drift excavated through a transition zone mined by a TBM at the Stillwater mine

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International Journal of Mining Science and Technology 2017年第1期27卷 71-76页

作者： Johnson Josh Jacobs Curt Ferster Mark Tadolini stephen Stillwater Mining Company NyeMT 59061USA Minova GeorgetownKYUSA

Stillwater Mining Company is the only U.S. producer of platinum group metals （PGMs） and the largest producer outside of South Afiica and Russia. The company controls a considerable portion of the J-M reef and is currently developing the ＂Blitz Project,＂ which will provide a main haulage level, ore pass systems, backfill plants, and fiow-through ventilation to increase production and ensure sustainable extraction of this critical strategic mineral. While driving two sub-parallel footwall laterals 8125 m in length, one of the development drifts experienced a massive fall in a geologically disturbed area created by a mafic dike intrusion. Combinations of a void fill material （Tekseal）, polyurethane injection, fore poling coupled with steel arches, and supplemental bolting allow safe and efficient advance through this geologically dis- turbed zone. This paper presents the details of this project.

关键词： TBM Ground Dike Cutterhead

Non-canonical BRAF variants and rearrangements in hairy cell leukemia

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Oncology Research 2024年第9期32卷 1423-1427页

作者： stephen E.LANGABEER Cancer Molecular Diagnostics St.James’s HospitalDublinD08 W9RTIreland

Hairy cell leukemia(HCL)is an uncommon mature B-cell malignancy characterized by a typical morphology,immunophenotype,and clinical *** vast majority of HCL patients harbor the canonical BRAF V600E mutation which has become a rationalized target of the subsequently deregulated RAS-RAF-MEK-MAPK signaling pathway in HCL patients who have relapsed or who are refractory to front-line ***,several HCL patients with a classical phenotype display non-canonical BRAF mutations or *** include sequence variants within alternative exons and an oncogenic fusion with the IGH *** must be taken in the molecular diagnostic work-up of patients with typical HCL but without the BRAF V600E to include investigation of these uncommon ***,functional characterization,and reporting of further such patients is likely to provide insights into the pathogenesis of HCL and enable rational selection of targeted inhibitors in such patients if required.

关键词： Hairy cell leukemia BRAF Molecular diagnostics Targeted therapy

Development of systemic therapy for hepatocellular carcinoma at 2013:Updates and insights

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World Journal of Gastroenterology 2014年第12期20卷 3135-3145页

作者： stephen L Chan Winnie Yeo Department of Clinical Oncology The Chinese University of Hong KongPrince of Wales Hospital State Key Laboratory in Oncology in South China

A growing number of multi-targeted tyrosine kinase inhibitor (TKI) has undergone testing for hepatocellular carcinoma (HCC). Unfortunately, this enthusiasm has recently been discouraged by a number of negative phase III studies on several anti-angiogenic TKIs in HCC. Several postulations have been made to account for this phenomenon, namely the plateau effects of anti-angiogenesis approach, the heterogeneity of HCC in terms of background hepatitis/cirrhosis and tumor biology, as well as the way how clinical trials are designed. Regardless of the underlying reasons, these results suggested that alternative strategies are necessary to further develop systemic therapy for HCC. Several new strategies are currently evaluated: for examples, molecular agents with activities against targets other than vascular endothelial growth factor receptor are being evaluated in on-going clinical trials. In addition, different approaches of targeted agents in combination with various treatment modalities, such as concurrently with another molecular agent, cytotoxic chemotherapy or transarterial chemoembolization, are being developed. This review aims to give a summary on the results of recently released clinical trials on TKIs, followed by discussion on some of the potential novel agents and combinational approaches. Future directions for testing innovative systemic agents for HCC will also be discussed.

关键词： Liver neoplasms Systemic treatment Biologics Staging Clinical trial

Predicting crash injury severity at unsignalized intersections using support vector machines and naïve Bayes classifiers

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Transportation Safety and Environment 2020年第2期2卷 120-132页

作者： stephen A.Arhin Adam Gatiba Howard University Transportation Research Center 23006th Street NWWashingtonDC 20059United States

The Washington,DC crash statistic report for the period from 2013 to 2015 shows that the city recorded about 41789 crashes at unsignalized intersections,which resulted in 14168 injuries and 51 *** economic cost of these fatalities has been estimated to be in the millions of *** is therefore necessary to investigate the predictability of the occurrence of theses crashes,based on pertinent factors,in order to provide mitigating *** research focused on the development of models to predict the injury severity of crashes using support vector machines(SVMs)and Gaussian naïve Bayes classifiers(GNBCs).The models were developed based on 3307 crashes that occurred from 2008 to *** SVM models and a GNBC model were *** most accurate model was the SVM with a radial basis kernel *** model predicted the severity of an injury sustained in a crash with an accuracy of approximately 83.2%.The GNBC produced the worst-performing model with an accuracy of 48.5%.These models will enable transport officials to identify crash-prone unsignalized intersections to provide the necessary countermeasures beforehand.

关键词： crashes unsignalized intersection support vector machines Gaussian naïve Bayes classifier injury severity

Improved Carroll’s hyperelastic model considering compressibility and its finite element implementation

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Acta Mechanica Sinica 2021年第5期37卷 785-796,I0002页

作者： stephen Kirwa Melly Liwu Liu Yanju Liu Jinsong Leng Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)Harbin 150001China Center for Composite Materials and Structures Harbin Institute of Technology(HIT)Harbin 150080China

In engineering component design,material models are increasingly used in finite element simulations for an expeditious and less costly analysis of the design *** such,researchers strive to formulate models that are less complex,robust,and *** the realm of hyperelastic materials,phenomenological-based Carroll’s model is highly promising due to its simplicity and *** work proposes its further improvement by modifying the strain energy density function to comply with the restriction that it should vanish at reference configuration and adding a compressible term to capture the practical behavior of elastomeric materials and to avoid numerical problems during finite element *** model constants for both the original and the modified versions were obtained by fitting their respective expressions to the classical Treloar’s experimental data using the Levenberg-Marquardt *** modified model was implemented using Abaqus CAE 2016 via a vectorized user material(VUMAT)*** of the model predictions with Treloar’s experimental data demonstrated the superiority of the modified version particularly in the equibiaxial loading ***,the simulated and the experimentally observed behavior agreed to a great accuracy thus making the modified model suitable for simulating the loading response of components fabricated of elastomeric materials.

关键词： Elastomers Rubber-like Strain energy function Finite deformation