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Management of difficult inflammatory bowel d.s.ase:where are we now?

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World Journal of Gastroenterology 2000年第3期6卷 315-323页

作者： d.s. Rampton Reader & Consultant Gastroenterologist Gastrointestinal Science Research Unit and Digestive Diseases Research CentreSt Bartholomews & Royal London School of Medicine and DentistryLondon E1 2ADUK

INTROdUCTION Medical care of patients with inflammatory bowel d.s.ase(IBd) comprise general measures and.s.ecific pharmacological,nutritional,end.s.opic and.s.rgical

关键词： inflammatory bowel d.s.ases/therapy colitis/therapy Crohn d.s.ase/therapy end.s.opy gastrointestinal social support azathioprine

Optomechanical dark state in a dual-species Bose-Einstein Condensate

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Communications in Theoretical Physics 2012年第10期58卷 551-556页

作者：景辉 d.s. Goldbaum department of Physics Henan Normal University B2 Institute Department of Physics and College of Optical SciencesThe University of Arizona

We study cavity optomechanics of ultracold dual-species atomic mixtures with nonlinear *** interactions provide a direct parametric coupling of fictitious mechanical elements which,through interfering with the intracavity optical field,leads to a switchable optically-dark state for either *** demonstrates a matterwave analog of recently observed mechanical wave mixing and quantum motional-state swapping,with applications in the construction of integrated phononic devices,and the cavity-enhanced detection of quantum degenerate atomic mixtures.

关键词： optomechanics Bose-Einstein condensate bistability

A comprehensive investigation on nonlinear vibration and bending characteristics of bio-inspired helicoidal laminated composite structures

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 81-100页

作者： s.sAURABH R.KIRAN d.s.NGH R.VAIsH V.s.CHAUHAN school of Mechanical and Materials Engineering Indian Institute of Technology Mandi

Bio-inspired helicoidal composite laminates, inspired by the intricate helical structures found in nature, present a promising frontier for enhancing the mechanical properties of structural d.s.gns. Hence, this study provid.s.a comprehensive investigation into the nonlinear free vibration and nonlinear bending behavior of bio-inspired composite plates. The inverse hyperbolic shear deformation theory(IHsdT) of plates is employed to characterize the d.s.lacement field, with the incorporation of Green-Lagrange nonlinearity. The problem is modeled using the C0finite element method(FEM), and an in-house code is developed in the MATLAB environment to solve it numerically. Various helicoidal layup configurations including helicoidal recursive(HR), helicoidal exponential(HE), helicoidal semi-circular(Hs), linear helicoidal(LH), and Fibonacci helicoidal(FH)with different layup sequences and quasi-isotropic configurations are studied. The model is validated, and parametric studies are conducted. These studies investigate the effects of layup configurations, side-to-thickness ratio, modulus ratios, boundary conditions, and loading conditions at different load amplitud.s.on the nonlinear vibration and nonlinear bending behaviors of bio-inspired composite plates. The results show that the laminate sequence exerts a substantial impact on both nonlinear natural frequencies and nonlinear bending behaviors. Moreover, this influence varies across different side-to-thickness ratios and boundary conditions of the bio-inspired composite plate.

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Essential oil content and composition of Indian sandalwood (santalum album) in sri Lanka

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Journal of Forestry Research 2013年第1期24卷 127-130页

作者： Upul subasinghe Manuri Gamage d.s. Hettiarachchi department of Forestry and Environmental sciences Sri Jayewar- denepura UniversityNugegoda 10250Sri Lanka. Wescorp Group Caning Vale6155Western Australia.

santalum album （Indian sandalwood） is found in the mountainous regions of the intermediate zone of sri Lanka. Few studies have been conducted on sandalwood ecology in this region, and ours is the first recorded.s.udy of essential oil content and chemical composition of heartwood. We harvested two trees with state permission and took cross-sections for analysis. We demonstrated a difference in the heartwood formation and oil yield of the trees. The composition of the oil was found to be consistent between trees and along the trunk of the tree. Main aromatic compounds were santalols and other compounds are recorded in lesser quantities. Results of this study comply with the other published work on sandalwood elsewhere. This initial study on s. album in sri Lanka provided promising results for the future of sandalwood agroforestry.

关键词： essential oil sri Lanka sandalwood santalum album santalol

Lightweight key d.s.ribution for secured and energy efficient communication in wireless sensor network:An optimization assisted model

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High-Confidence Computing 2023年第2期3卷 40-49页

作者： Ezhil Roja P. Misbha d.s. department of Computer science Nesamony Memorial Christian CollegeMarthandam 629165India department of Computer science and Applications Nesamony Memorial Christian CollegeMarthandam 629165India

due to their open,expansive,and resource-constrained character,Wireless sensor Networks(WsNs)face significant energy,efficiency,and.s.curity *** a fair level of energy and resource consumption,several lightweight cryptographic techniques are introduced to increase the security as well as effectiveness of ***,they have problems with scalability,key d.s.ribution,security,and power *** work proposes a novel light weighted key d.s.ribution mechanism for safe and energy efficient communication in *** proposed model includ.s.stages like optimal Cluster Head.s.lection(CHs),improved Elliptic Curve Cryptography(ECC)-based encryption,and lightweight key management,*** the first phase,a hybrid optimization strategy is proposed,termed as Coot updated Butterfly algorithm with Logistic solution space algorithm(CUBA-Lss)for optimal clustering via selecting the optimal *** selection process relies on the consideration of the Received.s.gnal strength Indicator(RssI),energy,delay,and *** transmission is the subsequent process,where the proposed algorithm ensures secured transmission through Improved *** last,a lightweight key management system is determined via session key generation to protect the encryption key.

关键词： WsN Cluster head RssI Elliptic curve CUBA-Lss optimization

Variation among poplar clones for growth and crown traits under field conditions at two sites of North-western India

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Journal of Forestry Research 2013年第1期24卷 61-67页

作者： G.P.s. dhillon Avtar singh d.s. sidhu H.s. Brar department of Forestry & Natural Resources Punjab Agricultural UniversityLudhiana 141 004India. Punjab Agriculture University Regional Research StationBathinda151 001 PunjabIndia.

We evaluated the growth and crown traits of 36 poplar clones at two d.s.inct agro-climatic regions of Punjab （Ludhiana and Bathinda） in northwestern India, following randomized block d.s.gn with three replications and plot size of four trees. significant differences among clones （p〈0.001） were observed for diameter at breast height （dBH）, tree height, volume, crown width and number of branches under both the site conditions. Clones ‘G-3’, ‘25-N’ and ‘41-N’ at Ludhiana and ‘G-3’, ‘Rd-01’ and ‘s7C8’ at Bathinda were found to be superior for volume production. All growth and crown traits registered.s.gnificantly higher values at Ludhiana in comparison to those at Bathinda. Clone site interaction was also significant （p〈0.001）. For volume, clones ‘L-62/84’, ‘113520’, ‘25-N’ and ‘s4C2’ witnessed huge fluctuations in ranking between sites. The correlations between growth traits were positive and highly significant （p〈0.001） at both sites. The clonal mean heritability was moderate for dBH and volume both at Ludhiana （0.61–0.66） and Bathinda （0.61–0.62）. Across sites, the genetic advance was the highest for volume （49.76%） and the lowest （6.50%） in case of height.

关键词： clonal heritability clonal selection clone-site interaction genetic correlation Populus deltoides

Generalized polynomial chaos expansion by reanalysis using static condensation based on substructuring

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Applied Mathematics and Mechanics(English Edition) 2024年第5期45卷 819-836页

作者： d.lee s.CHANG J.lee department of Automotive Engineering Hanyang UniversitySeoul 04763Republic of Korea school of Mechanical Engineering Chungnam National UniversityDaejeon 34134Republic of Korea department of Mechanical Robotics and Energy EngineeringDongguk UniversitySeoul 04620Republic of Korea

This paper presents a new computational method for forward uncertainty quantification(UQ)analyses on large-scale structural systems in the presence of arbitrary and dependent random *** method consists of a generalized polynomial chaos expansion(GPCE)for statistical moment and reliability analyses associated with the stochastic output and a static reanalysis method to generate the input-output data *** the reanalysis,we employ substructuring for a structure to isolate its local regions that vary due to random *** allows for avoiding repeated computations of invariant substructures while generating the input-output data *** substructuring with static condensation further improves the computational efficiency of the reanalysis without losing ***,the GPCE with the static reanalysis method can achieve significant computational saving,thus mitigating the curse of dimensionality to some degree for UQ under high-dimensional *** numerical results obtained from a simple structure indicate that the proposed method for UQ produces accurate solutions more efficiently than the GPCE using full finite element analyses(FEAs).We also demonstrate the efficiency and.s.alability of the proposed method by executing UQ for a large-scale wing-box structure under ten-dimensional(all-dependent)random inputs.

关键词： forward uncertainty quantification(UQ) generalized polynomial chaos expansion(GPCE) static reanalysis method static condensation substructuring

Flexural-wave-generation using a phononic crystal with a piezoelectric defect

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Applied Mathematics and Mechanics(English Edition) 2023年第8期44卷 1241-1262页

作者： s.H.JO d.lee department of Mechanical Roboticsand Energy EngineeringDongguk UniversitySeoul 04620Republic of Korea department of Mechanical Engineering Seoul National UniversitySeoul 08826Republic of Korea

This paper proposes a method to amplify the performance of a flexural-wave-generation system by utilizing the energy-localization characteristics of a phononic crystal(PnC)with a piezoelectric defect and an analytical approach that accelerates the predictions of such wave-generation *** proposed analytical model is based on the Euler-Bernoulli beam *** proposed analytical approach,inspired by the transfer matrix and.s.parameter methods,is used to perform band.s.ructure and time-harmonic analyses.A comparison of the results of the proposed approach with those of the finite element method validates the high predictive capability and time efficiency of the proposed model.A case study is explored;the results demonstrate an almost ten-fold amplification of the velocity amplitud.s.of flexural waves leaving at a defect-band frequency,compared with a system without the ***,d.s.gn guidelines for piezoelectric-defect-introduced PnCs are provided by analyzing the changes in wave-generation performance that arise depending on the defect location.

关键词： phononic crystal(PnC) defect wave-generation fexural wave analytical model

The effect of the dopant's reactivity for high-performance 2d Mos2 thin-film transistor

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Nano Research 2021年第1期14卷 198-204页

作者： Hanleem lee sora Bak Joosung Kim Hyoyoung lee Center for Integrated Nanostructure Physics(CINAP) Institute for Basic Science(IBS)Suwon 16419Republic of Korea department ofChem istryy sungkyunkwan University Suwon 16419Republic of Korea department of Energy science Sungkyunkwan UniversitySuwon 16419Republic of Korea department of Biophysics Sungkyunkwan UniversitySuwon 16419Republic of Korea

There are many studies on the solution-processed thin-film transistor(TFT)using transition metal dichalcogenide(TMd)***,it is hard to control the electrical property of chemically exfoliated TMd materials compared to the chemical vapor deposition *** investigation into the electrical modulation behavior of exfoliated two-dimensional(2d)material is important tofabricate weH-modulated electronic devices via solution ***,we report the effects of reactivity of organic dopants on Mos2 and investigate how the chemical doping behavior influences the electrical properties of *** band.s.ate of dopants,which is related to the electron-withdrawing and donating behavior of chemical dopant,provid.s.a proportional shift in the threshold voltages(Vth)of their field-effect transistors(FETs).However,on/off current ratio(Ion/Ioff)and mobility(μ)are strongly influenced by the defect density depending on the reactivity of doping reaction,rather than the band.s.ate of organic *** the in-depth study on the doping reaction,we fabricate a FET and a TFT,having high mobility and a relatively high on/off ratio(10^(4))using a solution process.

关键词： 2d materials functionalization thin-film transistor doping defect