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Quality of care delivered to hospitalized inflammatory bowel disease patients

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World Journal of Gastroenterology 2013年第38期19卷 6360-6366页

作者： Adam v Weizman Geoffrey c Nguyen Division of Gastroenterology Women’s College HospitalUniversity of TorontoTorontoM5S 1B2OntarioCanada Mount Sinai Hospital centre for Inflammatory Bowel Disease University of TorontoTorontoM5G 1X5OntarioCanada Division of Gastroenterology and Hepatology Johns Hopkins School of MedicineBaltimoreMD 21201United States

Hospitalized patients with inflammatory bowel disease(IBD)are at high risk for morbidity,mortality,and health care utilization *** the literature on trends in hospitalization rates for this disease is conflicting,there does appear to be significant variation in the delivery of care to this complex group,which may be a marker of suboptimal quality of *** is a need for improvement in identifying patients at risk for hospitalization in an effort to reduce ***,appropriate screening for a number of hospital acquired complications such as venous thromboembolism and clostridium difficile infection is *** review discusses areas of inpatient care for IBD patients that are in need of improvement and outlines a number of potential quality improvement initiatives such as payfor-performance models,quality improvement frameworks,and healthcare information technology.

关键词： crohn’s disease Hospitalization Inflammatory bowel disease Quality improvement Ulcerative colitis

Robust and low-cost interrogation technique for integrated photonic biochemical sensors based on Mach–Zehnder interferometers

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Photonics Research 2016年第2期4卷 57-60页

作者： v.Toccafondo c.J.Oton consorzio Nazionale Interuniversitario per le Telecomunicazioni Scuola Superiore Sant'Anna

We describe and experimentally demonstrate a measuring technique for Mach–Zehnder interferometer(MZI)based integrated photonic biochemical sensors. Our technique is based on the direct measurement of phase changes between the arms of the MZI, achieved by signal modulation on one of the arms of the interferometer together with pseudoheterodyne detection, and it allows us to avoid the use of costly equipment such as tunable light sources or spectrum analyzers. The obtained output signal is intrinsically independent of wavelength, power variations, and global thermal variations, making it extremely robust and adequate for use in real conditions. Using a silicon-on-insulator MZI, we demonstrate the real-time monitoring of refractive index variations and achieve a detection limit of 4.1 × 10^(-6)refractive index units(RIU).

关键词： Robust and low-cost interrogation technique for integrated photonic biochemical sensors based on Mach Zehnder interferometers

Protozoan colonization on artificial substrates in relation to water quality in a tropical Indian harbour

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Journal of Environmental Sciences 2001年第2期13卷 143-147页

作者： v.R.Bharati R.N.Khan c.Kalavati A.v.Raman Department of Zoology Andhra UniversityVisakhapatnam 530003India.

A field study was conducted to evaluate the protozoan colonization patterns on artificial substrates in relation to organic pollution within a tropical harbour. The composition of protozoans and their succession rates on artificial substrates(polyurethane foam units) were compared between two field stations(A and B), and their presence were considered with regards to the prevailing water quality conditions at the study sites. Altogether 44 genera of flagellates and ciliates were documented. The common genera of flagellates encountered included Monas, Polytoma, and chromalina. Among the ciliates, the predominant genera were Tetrahymena, vorticella, Lagynophyra, and Heloiphyra. These groups exhibited characteristic successional patterns in relation to ambient water quality. At Station A, located close to the sewage outfall, the water quality parameters included poor Secchi disc transparency(0.48m), dissolved oxygen of 1.93 mg/ml, salinity of 18 psu, and temperature 31.3 ℃. Here, the nanoflagellates( spumella ) colonized first, followed by microcilliate( Tetrahymena ) and sessile form( vorticella ). Station B, located on the seaward side, was characterized by relatively less stressed environmental conditions with transparency 1.85m and dissolved oxygen value of 6 04 mg/ml. Salinity of 27.27 psu, and mean temperature of 30 ℃ were recorded at “B'. At this station, the nanoflagellate Polytoma was first documented to colonize on the substrates, followed by microcilliate( Lagynophrya ) and suctorid( Heliophyra ). These findings support the use of protozoans as indicator species for evaluating the hazards posed by organic pollution to natural estuarine communities.

关键词： Protozoan colonization on artificial substrates in relation to water quality in a tropical Indian harbour

Three-dimensional mixed convection stagnation-point fow past a vertical surface with second-order slip velocity

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Applied Mathematics and Mechanics(English Edition) 2023年第4期44卷 641-652页

作者： A.v.ROScA N.c.ROScA I.POP Department of Statistics-Forecasts-Mathematics Faculty of Economics and Business AdministrationBabes-Bolyai UniversityCluj-Napoca 400084Romania Department of Mathematics Faculty of Mathematics and Computer ScienceBabes-Bolyai UniversityCluj-Napoca 400084Romania Academy of Romanian Scientists 3 Ilfov StreetBucharest 050044Romania

This study is concerned with the three-dimensional(3D)stagnation-point for the mixed convection flow past a vertical surface considering the first-order and secondorder velocity *** the authors’knowledge,this is the first study presenting this very interesting *** partial differential equations for the flow problem are transformed into nonlinear ordinary differential equations(ODEs)by using appropriate similarity *** ODEs with the corresponding boundary conditions are numerically solved by utilizing the bvp4c solver in MATLAB programming *** effects of the governing parameters on the non-dimensional velocity profiles,temperature profiles,skin friction coefficients,and the local Nusselt number are presented in detail through a series of graphs and ***,it is reported that the reduced skin friction coefficient decreases for the assisting flow situation and increases for the opposing flow *** numerical computations of the present work are compared with those from other research available in specific situations,and an excellent consensus is *** exciting feature for this work is the existence of dual *** important remark is that the dual solutions exist for both assisting and opposing flows.A linear stability analysis is performed showing that one solution is stable and the other solution is not *** notice that the mixed convection and velocity slip parameters have strong effects on the flow *** effects are depicted in graphs and discussed in this *** obtained results show that the first-order and second-order slip parameters have a considerable effect on the flow,as well as on the heat transfer characteristics.

关键词： three-dimensional(3D)mixed convection flow stagnation point flow first-order slip velocity second-order slip velocity numerical solution stability analysis

Fabrication,characterization and optimization of high conductivity and high quality nanocrystalline molybdenum thin films

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Journal of Materials Science & Technology 2019年第11期35卷 2734-2741页

作者： Anil K.Battu Nanthakishore Makeswaran c.v.Ramana center for Advanced Materials Research(cMR) University of Texas at El PasoEl PasoTX 79968USA Environmental Molecular Sciences Laboratory(EMSL) Pacific Northwest National Laboratory(PNNL)RichlandWA 99352USA

The present study investigated the influence of substrate temperature(Ts)and working pressure(P(Ar))on tailoring the properties of nanocrystalline(nc)molybdenum(Mo)films fabricated by radio-frequency magnetron *** structural,morphological,electrical and optical properties of nc-Mo films were evaluated in *** Mo films exhibited(110)orientation with average crystallite size varying from 9 to 22(±1)nm on increasing *** with structural data,the electrical resistivity decreased from 55μΩcm to 10μΩcm,which is the lowest among all the Mo *** Mo films deposited under variable P(Ar).the(110)peak intensity decrement coupled with peak broadening on increasing P(Ar).Lower deposition pressure yielded densely packed thin films with superior structural properties along with low resistivity of 15μΩ*** conditions to produce high quality Mo films with excellent structural,morphological,electrical and optical characteristics for utilization in solar cells as back contact layers were identified.

关键词： Molybdenum Thin films Microstructure Electrical characteristics Optical properties Solar cells

Establishing empirical relationships to predict grain size and tensile strength of friction stir welded AA 6061-T6 aluminium alloy joints

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Transactions of Nonferrous Metals Society of china 2010年第10期20卷 1863-1872页

作者： S.RAJAKUMAR c.MURALIDHA RAN v.BALASUBRAMANIAN Department of Manufacturing Engineering Annamalai University

AA 6061-T6 aluminium alloy(Al-Mg-Si alloy) has gathered wide acceptance in the fabrication of light weight structures requiring a high specific strength and good corrosion *** with the fusion welding processes that are routinely used for joining structural aluminium alloys,friction stir welding(FSW) process is an emerging solid state joining process in which the material welded does not melt and *** strength is influenced by the grain size and tensile strength of the weld nugget ***,an attempt was made to develop empirical relationships to predict grain size and tensile strength of friction stir welded AA 6061-T6 aluminium alloy *** empirical relationships are developed by response surface methodology(RSM) incorporating FSW tool and process parameters.A linear regression relationship was also established between grain size and tensile strength of the weld nugget of FSW joints.

关键词： AA 6061-T6 alloy friction stir welding analysis of variance regression analysis grain size tensile strength

Microstructure and corrosion behavior of NiTi shape memory alloys sintered in the SPS process

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International Journal of Minerals,Metallurgy and Materials 2019年第10期26卷 1311-1321页

作者： c.velmurugan v.Senthilkumar P.S.Kamala Department of Production Engineering National Institute of Technology

NiTi shape memory alloys(SMAs) was developed using the spark-plasma sintering(SPS) process with different average particle size(45 μm and 10 μm) under various temperature. The influence of particle size and temperature on the density, microstructure, and corrosion behavior of the NiTi in simulated body fluid was examined. The porosity decreased with increasing sintering temperature and decreasing particle size, which resulted in an increase in density of the alloy. Increasing the sintering temperature led to the formation of Ni-and Ti-rich intermetallic such as Ni3Ti and NiTi2. The formation of these secondary phases influenced the corrosion behavior of NiTi by changing its chemical composition. The planar structure of NiTi was transformed into a dendritic structure at 900℃, which resulted in the formation of uniform oxide and phosphate layers on the entire surface. A high corrosion potential and low corrosion current density were achieved with NiTi prepared with 10 μm particles at 900℃, which exhibited superior corrosion resistance.

关键词： shape memory alloys NiTi microstructure corrosion spark-plasma sintering

charge self-trapping in two strand biomolecules:Adiabatic polaron approach

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chinese Physics B 2023年第1期32卷 253-263页

作者： D chevizovich S Zdravković A v chizhov Z Ivić University of Belgrade Vinča Institute of Nuclear SciencesP.O.Box 522Belgrade 11001Serbia Joint Institute for Nuclear Research Laboratory for Radiation BiologyDubna 141980Russia Dubna State University Dubna 141980Russia Department of Physics University of CreteP.O.Box 2208Heraklion 71003Greece National University of Science and Technology MISiS Leninsky prosp.4Moscow 119049Russia

We investigate the properties of the excess charge(electron, hole) introduced into a two-strand biomolecule. We consider the possibility that the stable soliton excitation can be formed due to interaction of excess charge with the phonon subsystem. The influence of overlap of the molecular orbitals between adjacent structure elements of the macromolecular chain on the soliton properties is discussed. Special attention is paid to the influence of the overlapping of the molecular orbitals between structure elements placed on the different chains. Using the literature values of the basic energy parameters of the two-chain biomolecular structures, possible types of soliton solutions are discussed.

关键词： charge self-trapping adiabatic polaron soliton two-stranded biomolecules

Polarized Ketene Dithioacetals-versatile Synthons for Different Heterocycles

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chinese Journal of chemistry 2012年第8期30卷 1886-1892页

作者： venkatesh B.c. Premakumari c. Padmaja A. Padmavathi v. Department of chemistry Sri Venkateswara UniversityTirupati-517502Andhra PradeshIndia

The reactivity of polarized ketene dithioacetals to develop a variety of heterocycles under different conditions was studied.

关键词： polarized ketene dithioacetals thienothiophenes bis-benzoxazolyl/benzothiazolyl/benzimidazolyl-pyrazolidine diones/isoxazolidinediones/pyrimidinetriones/thioxopyrimidinediones cyclocondensation