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Evidence For A Role Of Endogenous Nesfatin-1 In The Control Of Water Drinking, G. L.C. Yosten, L. Redlinger, W. K. Samson Jul 2012

Evidence For A Role Of Endogenous Nesfatin-1 In The Control Of Water Drinking, G. L.C. Yosten, L. Redlinger, W. K. Samson

Biological Sciences Faculty Research & Creative Works

Nesfatin-1, a post-translational product of the nucleobindin-2 (NucB2) gene, is produced in several brain areas known to be important in neuroendocrine, autonomic and metabolic function, including the hypothalamus and medulla. The hallmark action of the peptide is its ability at picomole doses to inhibit food and water intake in rodents and, indeed, the effect on water intake is more pronounced than that on food intake. In preliminary studies, we observed a decrease in hypothalamic NucB2 expression in response to overnight water deprivation even when food was present, which reversed when water was returned to the animals. We therefore hypothesised that …

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The Effects Of The Flyer Plate's Radius Of Curvature On The Performance Of An Explosively Formed Projectile, Phillip R. Mulligan, Jason Baird, Joshua Hoffman Jul 2012

The Effects Of The Flyer Plate's Radius Of Curvature On The Performance Of An Explosively Formed Projectile, Phillip R. Mulligan, Jason Baird, Joshua Hoffman

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

An explosively formed projectile (EFP) is known for its ability to penetrate vehicle armor effectively. Understanding how an EFP’s physical parameters affect its performance is crucial to development of armor capable of defeating such devices. The present study uses two flyer plate radii of curvature to identify the experimental effects of the flyer plate’s radius of curvature on the measured projectile velocity, depth of penetration, and projectile shape. The Gurney equation is an algebraic relationship for estimating the velocity imparted to a metal plate in contact with detonating explosives. The authors of this research used a form of the Gurney …

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Implications For The Origin Of Grb 051103 From Ligo Observations, J. Abadie, Marco Cavaglia, For Full List Of Authors, See Publisher's Website. Jul 2012

Implications For The Origin Of Grb 051103 From Ligo Observations, J. Abadie, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.

Physics Faculty Research & Creative Works

We present the results of a LIGO search for gravitational waves (GWs) associated with GRB 051103, a short-duration hard-spectrum gamma-ray burst (GRB) whose electromagnetically determined sky position is coincident with the spiral galaxy M81, which is 3.6 Mpc from Earth. Possible progenitors for short-hard GRBs include compact object mergers and soft gamma repeater (SGR) giant flares. A merger progenitor would produce a characteristic GW signal that should be detectable at a distance of M81, while GW emission from an SGR is not expected to be detectable at that distance. We found no evidence of a GW signal associated with GRB …

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Four Body Charge Transfer Process In Proton Helium Collision, Uttam Chowdhury, Allison L. Harris, Jerry Peacher, Don H. Madison Jul 2012

Four Body Charge Transfer Process In Proton Helium Collision, Uttam Chowdhury, Allison L. Harris, Jerry Peacher, Don H. Madison

Physics Faculty Research & Creative Works

Recent advancements in experimental techniques now allow for the study of fully differential cross sections for 4-body collisions. Theoretical fully differential cross sections will be presented and compared with absolute experimental data for transfer-excitation in proton-helium collisions. The role of different scattering mechanism will be discussed.

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Low Energy (E, 2e) Study From The 1t₂ Orbital Of Ch₄, Shenyue Xu, Hari Chaluvadi, Xueguang Ren, Thomas Pfluger, Arne Senftleben, Chuangang Ning, Shuncheng Yan, Peng Zhang, Jie Yang, Xinwen Ma, Joachim Hermann Ullrich, Don H. Madison, Alexander Dorn Jul 2012

Low Energy (E, 2e) Study From The 1t₂ Orbital Of Ch₄, Shenyue Xu, Hari Chaluvadi, Xueguang Ren, Thomas Pfluger, Arne Senftleben, Chuangang Ning, Shuncheng Yan, Peng Zhang, Jie Yang, Xinwen Ma, Joachim Hermann Ullrich, Don H. Madison, Alexander Dorn

Physics Faculty Research & Creative Works

Single ionization of the methane (CH4) 1t2 orbital by 54 eV electron impact has been studied experimentally and theoretically. The measured triple differential cross sections cover nearly a 4π solid angle for the emission of low energy electrons and a range of projectile scattering angles. Experimental data are compared with theoretical calculations from the distorted wave Born approximation and the molecular three-body distorted wave models. It is found that theory can give a proper description of the main features of experimental cross section only at smaller scattering angles. For larger scattering angles, significant discrepancies between experiment and …

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Conditions For Extracting Photoionization Cross Sections From Laser-Induced High-Order-Harmonic Spectra, Guoli Wang, Cheng Jin, Anh-Thu Le, C. D. Lin Jul 2012

Conditions For Extracting Photoionization Cross Sections From Laser-Induced High-Order-Harmonic Spectra, Guoli Wang, Cheng Jin, Anh-Thu Le, C. D. Lin

Physics Faculty Research & Creative Works

We show that photoionization cross sections of atoms can be accurately extracted from the high-order-harmonic spectra generated by intense infrared lasers only if the degree of ionization in the gas medium is small, implying that for this purpose the high-order-harmonic generation spectra should be taken at low gas pressure and at low laser intensity experimentally.

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Spin Diffusion In Bulk Gan Measured With Mnas Spin Injector, Shafat Jahangir, Fatih Dogan, Hyun Kum, Aurelien Manchon, Pallab Bhattacharya Jul 2012

Spin Diffusion In Bulk Gan Measured With Mnas Spin Injector, Shafat Jahangir, Fatih Dogan, Hyun Kum, Aurelien Manchon, Pallab Bhattacharya

Materials Science and Engineering Faculty Research & Creative Works

Spin injection and precession in bulk wurtzite n-GaN with different doping densities are demonstrated with a ferromagnetic MnAs contact using the three-terminal Hanle measurement technique. Theoretical analysis using minimum fitting parameters indicates that the spin accumulation is primarily in the n-GaN channel rather than at the ferromagnet (FM)/semiconductor (SC) interface states. Spin relaxation in GaN is interpreted in terms of the D'yakonov-Perel mechanism, yielding a maximum spin lifetime of 44 ps and a spin diffusion length of 175 nm at room temperature. Our results indicate that epitaxial ferromagnetic MnAs is a suitable high-temperature spin injector for GaN.

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Fully Differential Cross Section For Four Body Charge Transfer Process, Uttam Chowdhury, Allison L. Harris, Jerry Peacher, Don H. Madison Jul 2012

Fully Differential Cross Section For Four Body Charge Transfer Process, Uttam Chowdhury, Allison L. Harris, Jerry Peacher, Don H. Madison

Physics Faculty Research & Creative Works

Recently experimental fully differential cross sections (FDCS) have been reported for double capture in proton helium collisions which disagree with existing theoretical calculations by two orders of magnitude. We introduce here a theoretical model for charge transfer processes which is fully quantum mechanical and takes all post collision interactions (PCI) between the particles into account exactly. The results of this model are in much better agreement with experimental data.

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Effects Of Rare-Earth Doping On Femtosecond Laser Waveguide Writing In Zinc Polyphosphate Glass, Luke B. Fletcher, Jon J. Witcher, Neil Troy, Signo Tadeu Dos Reis, Richard K. Brow, Denise M. Krol Jul 2012

Effects Of Rare-Earth Doping On Femtosecond Laser Waveguide Writing In Zinc Polyphosphate Glass, Luke B. Fletcher, Jon J. Witcher, Neil Troy, Signo Tadeu Dos Reis, Richard K. Brow, Denise M. Krol

Materials Science and Engineering Faculty Research & Creative Works

We have investigated waveguide writing in Er-Yb doped zinc polyphosphate glass using a femtosecond laser with a repetition rate of 1 KHz. We find that fabrication of good waveguides requires a glass composition with an O/P ratio of 3.25. The dependence on laser writing parameters including laser fluence, focusing conditions, and scan speed is reported. Waveguide properties together with absorption and emission data indicate that these glasses can be used for the fabrication of compact, high gain amplifying devices.

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Simultaneous Evaluation Of Multiple Key Material Properties Of Complex Stratified Structures With Large Spatial Extent, Mojtaba Behzad Fallahpour, Hamed Kajbaf, Mohammad Tayeb Ahmad Ghasr, Joseph Toby Case, R. Zoughi Jul 2012

Simultaneous Evaluation Of Multiple Key Material Properties Of Complex Stratified Structures With Large Spatial Extent, Mojtaba Behzad Fallahpour, Hamed Kajbaf, Mohammad Tayeb Ahmad Ghasr, Joseph Toby Case, R. Zoughi

Electrical and Computer Engineering Faculty Research & Creative Works

Measured complex reflection coefficient of a spatially-extended stratified composite structure, using an open-ended waveguide, can be effectively used to extract key material and geometrical characteristics of any given layer. This is accomplished using a combination of an electromagnetic model and corresponding measurement data. Previously, it was shown that one parameter can be extracted if all others are known. However, practically it is desirable to extract as many pieces of information as possible. To this end the model must be "inverted". However, there is no closed-form solution for the inverse problem, given the mathematical complexity of the forward model. Consequently, we …

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Concrete Surface With Nano-Particle Additives For Improved Wearing Resistance To Increase Truck Traffic, Genda Chen, Dongming Yan, Chenglin Wu, Zhibin Lin, Nicholas Leventis, Shruti Mahadik-Khanolkar Jul 2012

Concrete Surface With Nano-Particle Additives For Improved Wearing Resistance To Increase Truck Traffic, Genda Chen, Dongming Yan, Chenglin Wu, Zhibin Lin, Nicholas Leventis, Shruti Mahadik-Khanolkar

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study focused on the use of nanotechnology in concrete to improve the wearing resistance of concrete. The nano materials used were polymer cross-linked aerogels, carbon nanotubes, and nano-SiO2, nano-CaCO3, and nano-Al2O3 particles. As an indirect measurement of the concrete wearing resistance, the tensile and compressive properties and the permeability of concrete were evaluated for various mix designs. The optimal amount of nano material additives were determined following the American Society of Testing Methods (ASTM) standard test methodologies. The test results from the materials were compared for their mechanical behaviors. This type of …

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Behavior Of Full-Scale Rc T-Beams Strengthened In Shear With Externally Bonded Frp Sheets, Abdeldjelil Belarbi, Sang Wook Bae, Antonio Brancaccio Jul 2012

Behavior Of Full-Scale Rc T-Beams Strengthened In Shear With Externally Bonded Frp Sheets, Abdeldjelil Belarbi, Sang Wook Bae, Antonio Brancaccio

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Recently many research studies have investigated the shear behavior of reinforced concrete (RC) beams strengthened with fiber-reinforced polymer (FRP) composites. However, most were conducted on small-scale specimens. Thus, analytical models and design equations developed from those studies may not predict the actual behavior of large-scale RC beams strengthened with FRPs. in this study, an experimental study was performed on this topic using full-scale RC T-beams in order to understand the behavior of full-scale bridge beams strengthened in shear with FRP. the main parameters investigated in this study were the transverse steel reinforcement ratio and the effect of mechanical anchorage systems. …

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Initial Study And Verification Of A Distributed Fiber Optic Corrosion Monitoring System For Transportation Structures, Hai Xiao, Genda Chen, Zhan Gao, Ying Huang, Fujian Tang Jul 2012

Initial Study And Verification Of A Distributed Fiber Optic Corrosion Monitoring System For Transportation Structures, Hai Xiao, Genda Chen, Zhan Gao, Ying Huang, Fujian Tang

Electrical and Computer Engineering Faculty Research & Creative Works

For this study, a novel optical fiber sensing system was developed and tested for the monitoring of corrosion in transportation systems. The optical fiber sensing system consists of a reference long period fiber gratings (LPFG) sensor for corrosive environmental monitoring and a LPFG sensor coated with a thin film of nano iron and silica particles for steel corrosion monitoring. The environmental effects (such as pH and temperature) are compensated by the use of the reference LPFG sensor. The sensor design, simulation, and experimental validation were performed in this study to investigate the feasibility of the proposed sensing system for corrosion …

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The Multi-Product Price-Setting Newsvendor With Resource Capacity Constraints, Chase C. Murray, Abhijit Gosavi, Debabrata Talukdar Jul 2012

The Multi-Product Price-Setting Newsvendor With Resource Capacity Constraints, Chase C. Murray, Abhijit Gosavi, Debabrata Talukdar

Engineering Management and Systems Engineering Faculty Research & Creative Works

In this paper, we consider a newsvendor problem commonly encountered in retail stores that cater to budget-sensitive shoppers. the newsvendor sells multiple products, and in addition to determining order quantities must also determine the selling price of each product sold. the demand for each product is of a stochastic nature and depends on the demands of other products, i.e., is cross-elastic. We transform the objective function into a form that is amenable to developing integer-programming solutions and then develop a numeric optimization procedure rooted in the Nelder-Mead search technique. We obtain encouraging numerical results on some small-scale and large-scale problems. …

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Microwave Absorption Characteristics Of Substituted Ba 0.5sr 0.5m Xfe (12-2x)O 19 (M = Co ²⁺-Zr 4+ And Co 2+-Ti 4+) Sintered Ferrite At X-Band, Charanjeet Singh, S. Bindra Narang, Marina Koledintseva Jul 2012

Microwave Absorption Characteristics Of Substituted Ba 0.5sr 0.5m Xfe (12-2x)O 19 (M = Co ²⁺-Zr 4+ And Co 2+-Ti 4+) Sintered Ferrite At X-Band, Charanjeet Singh, S. Bindra Narang, Marina Koledintseva

Electrical and Computer Engineering Faculty Research & Creative Works

The microwave reflection loss (RL) of four series of synthesized ferrites, Ba0.5Sr0.5CoxZrxFe(12 - 2x)O19 and Ba0.5Sr0.5CoxTixFe(12 - 2x)O19, have been measured using network analyzer in the frequency range from 8.2 to 12.4 GHz. The comprehensive analysis of RL is carried out as a function of substitution, frequency, and thickness. The various models contributing to large RL are described. The composition accompanying maximum microwave absorption is suggested. © 2012 Wiley Periodicals, Inc.

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An Oxidase-Based Electrochemical Fluidic Sensor With High-Sensitivity And Low-Interference By On-Chip Oxygen Manipulation, Nitin Radhakrishnan, Jongwon Park, Chang Soo Kim Jul 2012

An Oxidase-Based Electrochemical Fluidic Sensor With High-Sensitivity And Low-Interference By On-Chip Oxygen Manipulation, Nitin Radhakrishnan, Jongwon Park, Chang Soo Kim

Electrical and Computer Engineering Faculty Research & Creative Works

Utilizing a simple fluidic structure, we demonstrate the improved performance of oxidase-Based enzymatic biosensors. Electrolysis of water is utilized to generate bubbles to manipulate the oxygen microenvironment close to the biosensor in a fluidic channel. for the proper enzyme reactions to occur, a simple mechanical procedure of manipulating bubbles was developed to maximize the oxygen level while minimizing the pH change after electrolysis. the sensors show improved sensitivities based on the oxygen dependency of enzyme reaction. in addition, this oxygen-rich operation minimizes the ratio of electrochemical interference signal by ascorbic acid during sensor operation (i.e., amperometric detection of hydrogen peroxide). …

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Methods For Fast Evaluation Of Self-Energy Matrices In Tight-Binding Modeling Of Electron Transport Systems, Jun Z. Huang, Weng Cho Chew, Yumao Wu, Li (Lijun) Jun Jiang Jul 2012

Methods For Fast Evaluation Of Self-Energy Matrices In Tight-Binding Modeling Of Electron Transport Systems, Jun Z. Huang, Weng Cho Chew, Yumao Wu, Li (Lijun) Jun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

Simulation of quantum carrier transport in nanodevices with non-equilibrium Green's function approach is computationally very challenging. One major part of the computational burden is the calculation of self-energy matrices. The calculation in tight-binding schemes usually requires dealing with matrices of the size of a unit cell in the leads. Since a unit cell always consists of several planes (for example, in silicon nanowire, four atomic planes for [100] crystal orientation and six for [111] and [112]), we show in this paper that a condensed Hamiltonian matrix can be constructed with reduced dimension (∼ 1 / 4 of the original size …

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Alternative Aefie-Efie Method For Broadband Cem Simulations, Jia Liu, Lijun Jiang Jul 2012

Alternative Aefie-Efie Method For Broadband Cem Simulations, Jia Liu, Lijun Jiang

Electrical and Computer Engineering Faculty Research & Creative Works

It is well known that electric field integral equation (EFIE) has the low frequency breakdown problem due to the decoupling of electric and magnetic field. Augmented electric field integral equation (AEFIE) method overcomes the low frequency breakdown. However, its performance degrades with the increasing frequency. To obtain a unified method that works for both low and high frequencies, a novel method using the EFIE complement process inside AEFIE is proposed. Numerical results demonstrated that this alternative AEFIE-EFIE method is able to extend integral equations to wide band applications. © 2012 Wiley Periodicals, Inc.

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Experimental And Computational Validation And Verification Of The Stokes-Darcy And Continuum Pipe Flow Models For Karst Aquifers With Dual Porosity Structure, Xiaolong Hu, Xiaoming Wang, Max Gunzburger, Fei Hua, Yanzhao Cao Jun 2012

Experimental And Computational Validation And Verification Of The Stokes-Darcy And Continuum Pipe Flow Models For Karst Aquifers With Dual Porosity Structure, Xiaolong Hu, Xiaoming Wang, Max Gunzburger, Fei Hua, Yanzhao Cao

Mathematics and Statistics Faculty Research & Creative Works

In our previous study, we developed the Stokes-Darcy (SD) model was developed for flow in a karst aquifer with a conduit bedded in matrix, and the Beavers-Joseph (BJ) condition was used to describe the matrix-conduit interface. We also studied the mathematical well-posedness of a coupled continuum pipe flow (CCPF) model as well as convergence rates of its finite element approximation. in this study, to compare the SD model with the CCPF model, we used numerical analyses to validate finite element discretisation methods for the two models. using computational experiments, simulation codes implementing the finite element discretisations are then verified. Further …

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Examination Of The Migratory Potential Of Patterned Cortical Neurons Using Laser Direct-Write, T. B. Phamduy, C. J. Rivet, D. Kingsley, R. J. Gilbert, D. B. Chrisey Jun 2012

Examination Of The Migratory Potential Of Patterned Cortical Neurons Using Laser Direct-Write, T. B. Phamduy, C. J. Rivet, D. Kingsley, R. J. Gilbert, D. B. Chrisey

Chemical and Biochemical Engineering Faculty Research & Creative Works

We describe the patterning of neuronal cultures by a laser-based printing system. Embryonic chick cortical neurons were transferred into predetermined array positions with micron accuracy, enabling detailed study of neuronal migration, aggregation, and neurite outgrowth regulated by cell-cell interactions on a homogeneous surface. Images of cells were analyzed up to 14 days. Results demonstrated that increasing the spacing between neighboring groups of cells causes intra-group cells to preferentially migrate towards each other and aggregate towards the center of the printed 'spot'. In addition, increasing the printed 'spot' size encouraged migration towards neighboring groups of cells. © 2012 IEEE.

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The Structural Characterization Of Ga 2o 3-Na 2o-Cao-Zno-Sio 2 Bioactive Glasses, T. J. Keenan, A. W. Wren, A. Coughlan, M. M. Hall, Mark R. Towler Jun 2012

The Structural Characterization Of Ga 2o 3-Na 2o-Cao-Zno-Sio 2 Bioactive Glasses, T. J. Keenan, A. W. Wren, A. Coughlan, M. M. Hall, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

The characterization of bioactive glasses in which zinc (Zn) has been incrementally replaced by gallium (Ga). © 2012 IEEE.

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Silver Coated Bioactive Glass Particles For Wound Healing Applications, P. Hassanzadeh, A. W. Wren, Mark R. Towler Jun 2012

Silver Coated Bioactive Glass Particles For Wound Healing Applications, P. Hassanzadeh, A. W. Wren, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

Hench and colleagues discovered that bone could bond chemically to certain glass compositions in 1969 [1]. This group of glasses is known as bioactive glasses [1]. Some special compositions of bioactive glasses will bond to soft tissues as well as bone [1]. One of the important characteristics of bioactive glasses is their ability to release beneficial ions such as Ca2+, Na+, Zn2+, Sr2+, and PO 43- in the body, which promote self-healing [2]. Bioactive glasses generally contain much less glass former (e.g., SiO2, B2O3 etc.) than conventional …

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Increasing The Quantity Of Silver In Zinc-Based Glass Polyalkenoate Cement: Is There An Improvement In Antibacterial Efficacy?, A. Coughlan, S. M. Breed, C. Ashraf, J. A. Cardinale, M. M. Hall, Mark R. Towler Jun 2012

Increasing The Quantity Of Silver In Zinc-Based Glass Polyalkenoate Cement: Is There An Improvement In Antibacterial Efficacy?, A. Coughlan, S. M. Breed, C. Ashraf, J. A. Cardinale, M. M. Hall, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

Bone cements should have the ability to chemically bond to both bone and surgical metals, exhibit no chemical or thermal necrosis, and have no significant shrinkage or exotherm upon setting. Taking these properties into consideration, glass polyalkenoate cements (GPCs) have potential as bone cements. GPCs are formed by the reaction between an ion-leachable glass and an aqueous solution of polyacrylic acid (PAA) [1] and have proven antibacterial and cariostatic properties [2], which are related to their ability to release beneficial amounts of ions over time [3, 4]. The GPCs can be formulated to release ions that can have a therapeutic …

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Gallium Containing Glass Polyalkenoate Bone Cements: Glass Characterization And Physical Properties, L. Placek, A. W. Wren, A. Coughlan, Mark R. Towler Jun 2012

Gallium Containing Glass Polyalkenoate Bone Cements: Glass Characterization And Physical Properties, L. Placek, A. W. Wren, A. Coughlan, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

Gallium (Ga) glasses were developed to formulate a Glass Polyalkenoate Cement (GPC) series with both E9 and E11 polyacrylic acid (PAA) at 50, 55 and 60wt% additions. Working times (T w), setting times (T s), compression (σ c), and biaxial flexural (σ f) strength testing were evaluated to determine the GPCs potential use in orthopedics. © 2012 IEEE.

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Efficient Wakeup Scheduling Considering Both Resource Usage And Timing Budget For Power Gating Designs, Ming Chao Lee, Yiyu Shi, Shih Chieh Chang Jun 2012

Efficient Wakeup Scheduling Considering Both Resource Usage And Timing Budget For Power Gating Designs, Ming Chao Lee, Yiyu Shi, Shih Chieh Chang

Electrical and Computer Engineering Faculty Research & Creative Works

Power gating has been a very effective way to reduce power leakage. Normally, wakeup scheduling is required to control the turn-on times of sleep transistors to limit the surge current during the wakeup process. in this paper, a voltage sensor is adopted to compare the virtual ground voltage with the predesigned reference voltages and use the result to determine the turn-on times of sleep transistors. We then propose a novel wakeup scheduling formulation that considers the tradeoff between wakeup times and hardware resources incurred by the voltage sensor. to address this problem, on the one hand, an efficient algorithm is …

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Polarization Transfer Of Bremsstrahlung Arising From Spin-Polarized Electrons, R. Märtin, G. Weber, R. Barday, Y. Fritzsche, U. Spillmann, W. Chen, R. D. Dubois, J. Enders, M. Hegewald, S. Hess, A. Surzhykov, D. B. Thorn, S. Trotsenko, M. Wagner Jun 2012

Polarization Transfer Of Bremsstrahlung Arising From Spin-Polarized Electrons, R. Märtin, G. Weber, R. Barday, Y. Fritzsche, U. Spillmann, W. Chen, R. D. Dubois, J. Enders, M. Hegewald, S. Hess, A. Surzhykov, D. B. Thorn, S. Trotsenko, M. Wagner

Physics Faculty Research & Creative Works

We report on a study of the polarization transfer between transversely polarized incident electrons and the emitted x rays for electron-atom bremsstrahlung. by means of Compton polarimetry we performed for the first time an energy-differential measurement of the complete properties of bremsstrahlung emission related to linear polarization, i.e., the degree of linear polarization as well as the orientation of the polarization axis. for the high-energy end of the bremsstrahlung continuum the experimental results for both observables show a high sensitivity on the initial electron spin polarization and prove that the polarization orientation is virtually independent of the photon energy. © …

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Timely Tidbits, Jun. 22, 2012, Library And Learning Resources Jun 2012

Timely Tidbits, Jun. 22, 2012, Library And Learning Resources

Timely Tidbits

No abstract provided.

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Laboratory-Based Microgrid Setup For Validating Frequency And Voltage Control In Islanded And Grid-Connected Modes, Shyam N. Bhaskara, Md Rasheduzzaman, Badrul H. Chowdhury Jun 2012

Laboratory-Based Microgrid Setup For Validating Frequency And Voltage Control In Islanded And Grid-Connected Modes, Shyam N. Bhaskara, Md Rasheduzzaman, Badrul H. Chowdhury

Electrical and Computer Engineering Faculty Research & Creative Works

Small sized synchronous generator based distributed generators (DG) often have low start-up times, and therefore serve as valuable dispatchable generators in a microgrid environment. the advantage is that it allows the power network to operate in a true smart grid environment. the disadvantage is that such DGs typically tend to have low inertia and the prime movers driving these resources need to be controlled in real time for them to operate effectively in islanded, grid-connected modes and during transition. When multiple DGs are present in the microgrid, the overall control can become complicated because of the need for sharing the …

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Automated Tongue Feature Extraction For Zheng Classification In Traditional Chinese Medicine, Ratchadaporn Kanawong, Tayo Obafemi-Ajayi, Tao Ma, Dong Xu, Shao Li, Ye Duan Jun 2012

Automated Tongue Feature Extraction For Zheng Classification In Traditional Chinese Medicine, Ratchadaporn Kanawong, Tayo Obafemi-Ajayi, Tao Ma, Dong Xu, Shao Li, Ye Duan

Electrical and Computer Engineering Faculty Research & Creative Works

ZHENG, Traditional Chinese Medicine syndrome, is an integral and essential part of Traditional Chinese Medicine theory. It defines the theoretical abstraction of the symptom profiles of individual patients and thus, used as a guideline in disease classification in Chinese medicine. For example, patients suffering from gastritis may be classified as Cold or Hot ZHENG, whereas patients with different diseases may be classified under the same ZHENG. Tongue appearance is a valuable diagnostic tool for determining ZHENG in patients. In this paper, we explore new modalities for the clinical characterization of ZHENG using various supervised machine learning algorithms. We propose a …

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Crystal Structures Of Trypanosoma Cruzi Udp-Galactopyranose Mutase Implicate Flexibility Of The Histidine Loop In Enzyme Activation, Richa Dhatwalia, Harkewal Singh, Michelle Oppenheimer, Pablo Sobrado, John J. Tanner Jun 2012

Crystal Structures Of Trypanosoma Cruzi Udp-Galactopyranose Mutase Implicate Flexibility Of The Histidine Loop In Enzyme Activation, Richa Dhatwalia, Harkewal Singh, Michelle Oppenheimer, Pablo Sobrado, John J. Tanner

Chemistry Faculty Research & Creative Works

Chagas disease is a neglected tropical disease caused by the protozoan parasite Trypanosoma cruzi. Here we report crystal structures of the galactofuranose biosynthetic enzyme UDP-galactopyranose mutase (UGM) from T. cruzi, which are the first structures of this enzyme from a protozoan parasite. UGM is an attractive target for drug design because galactofuranose is absent in humans but is an essential component of key glycoproteins and glycolipids in trypanosomatids. Analysis of the enzyme-UDP noncovalent interactions and sequence alignments suggests that substrate recognition is exquisitely conserved among eukaryotic UGMs and distinct from that of bacterial UGMs. This observation has implications for inhibitor …

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