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Articles 10861 - 10890 of 33650
Full-Text Articles in Entire DC Network
Personnel In Geotechnical Earthquake Eng. In India, B. K. Maheshwari
Personnel In Geotechnical Earthquake Eng. In India, B. K. Maheshwari
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Cooperation Between Ngi & Iit Roorkee, Amir M. Kaynia
Cooperation Between Ngi & Iit Roorkee, Amir M. Kaynia
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Minutes For The First Meeting Of The Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Minutes For The First Meeting Of The Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Membership Of Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Membership Of Forum For Promotion Of Soil Dynamics In India, Shamsher Prakash
Forum for Promotion of Soil Dynamics in India
No abstract provided.
Analyzing The Effect Of Client Queue Size On Voip And Tcp Traffic Over An Ieee 802.11e Wlan, Sajib Datta, Sajal Das
Analyzing The Effect Of Client Queue Size On Voip And Tcp Traffic Over An Ieee 802.11e Wlan, Sajib Datta, Sajal Das
Computer Science Faculty Research & Creative Works
In this paper we introduce a mathematical model to analyze the performance of Wi-Fi networks carrying voice calls and TCP controlled file downloads. We derive the voice call capacity, the TCP throughput, and the bandwidth utilization using the proposed five-dimensional Markov model. We show that there exists a correlation among the queue size of client nodes and the capacity and throughput of the network. We also demonstrate how bandwidth utilization is affected by variable packet arrival rates. The analytical results match well with the simulation results generated by QualNet simulator. Moreover, we conduct an experimental study of the Enhanced Distributed …
A Decentralized Fault Accommodation Scheme For Nonlinear Interconnected Systems, H. Ferdowsi, S. Jagannathan
A Decentralized Fault Accommodation Scheme For Nonlinear Interconnected Systems, H. Ferdowsi, S. Jagannathan
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, a novel decentralized detection and accommodation (FDA) methodology is proposed for interconnected nonlinear continuous-time systems by using local subsystem states alone in contrast with traditional distributed FDA schemes where the entire measured or the estimated state vector is needed. First, the detection scheme is revisited where a network of local fault detectors (LFD) is proposed. A fault is detected by generating a residual from the measured and estimated state vectors locally and the fault dynamics are estimated by using an online approximator upon detection. Subsequently, a fault accommodation scheme is initiated in the subsystem by using a …
A Neural Network Based Outlier Identification And Removal Scheme, H. Ferdowsi, S. Jagannathan, M. Zawodniok
A Neural Network Based Outlier Identification And Removal Scheme, H. Ferdowsi, S. Jagannathan, M. Zawodniok
Electrical and Computer Engineering Faculty Research & Creative Works
Identifying and removing the outliers is important in order to make the data more trustworthy and improve the reliability of fault detection, since outliers in the measured data can cause false alarms. An online outlier identification and removal (OIR) scheme, suitable for nonlinear dynamic systems, is proposed in this paper. A neural network (NN) is utilized to estimate the actual outlier-free system states using only the measured system states which involve outliers. Outlier identification is performed online by finding the difference between measured and estimated states and comparing it with its median and standard deviation over a dynamic time window. …
The Missouri Miner, December 5, 2013
The Missouri Miner, December 5, 2013
The Missouri Miner Newspaper
No abstract provided.
An Efficiently Preconditioned Eigenanalysis Of Inhomogeneously Loaded Rectangular Cavities, Qi I. Dai, Yat Hei Lo, Weng Cho Chew, Li (Lijun) Jun Jiang
An Efficiently Preconditioned Eigenanalysis Of Inhomogeneously Loaded Rectangular Cavities, Qi I. Dai, Yat Hei Lo, Weng Cho Chew, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
In this letter, we demonstrate an efficient preconditioning scheme for the eigenanalysis of inhomogeneously loaded rectangular cavities. Modeling the entire structure with the finite-difference frequency-domain (FDFD) method yields a large sparse eigenvalue problem. The desired interior eigen-spectrum is sought for by Arnoldi iterations with the shift-and-invert operation, where the inversion can only be performed iteratively in large-scale applications. A preconditioner is constructed to speed up the inversion. It can effectively shrink the spectrum of the governing matrix and can be solved for by using fast discrete sine and cosine transforms (DSTs and DCTs). Several numerical examples are included to illustrate …
A Novel Broadband Equivalent Source Reconstruction Method For Broadband Radiators, Ping Li, Li (Lijun) Jun Jiang, Jun Hu, Sheng Sun
A Novel Broadband Equivalent Source Reconstruction Method For Broadband Radiators, Ping Li, Li (Lijun) Jun Jiang, Jun Hu, Sheng Sun
Electrical and Computer Engineering Faculty Research & Creative Works
Traditional equivalent source reconstruction methods are only operating at a single frequency point each time. However, for wide band radiators, their computation cost of the source reconstruction increases linearly with the number of frequency points. In this paper, a wide-band equivalent source reconstruction method (WB-SRM) based on the Neville-type Stoer-Bulirsch (SB) algorithm is developed. Supported by the adaptive frequency sampling (AFS) scheme, the number of required sampling data is significantly reduced, which leads to much better computational efficiency. During the AFS process, three fitting models (FM) are considered: two are 'triangle rules', and another one is 'rhombus rule'. The combination …
Fast And Efficient Low-Frequency Algorithms For Multiscale Structure Modeling, Sheng Sun, Zu Hui Ma, Qin S. Liu, Zhi Guo Qian, Lijun Jiang, Weng Cho Chew
Fast And Efficient Low-Frequency Algorithms For Multiscale Structure Modeling, Sheng Sun, Zu Hui Ma, Qin S. Liu, Zhi Guo Qian, Lijun Jiang, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
This paper reviews our recently developed fast and efficient algorithms for multiscale structure modeling. Low-frequency electromagnetic analysis becomes indispensable for multi-scale structures because of the involved minute length-scale compared to wavelength and mid length-scale on the order of wavelength or larger, where wave physics meets circuit physics. We are currently investigating stable low-frequency solutions in solving integral equations without the need for loop-tree decomposition, including the augmented EFIE, equivalence principle based algorithms, and perturbation-based Calderon multiplicative preconditioning methods. © 2013 IEEE.
Passivization Of Em Peec Solutions In The Frequency And Time Domain, Albert E. Ruehli, Giulio Antonini, Lijun Jiang
Passivization Of Em Peec Solutions In The Frequency And Time Domain, Albert E. Ruehli, Giulio Antonini, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
The stability issues for time domain integral equations is well known and it has been investigated for a long time. In this paper, we pursue an approach for the stabilization and even passivization of the electromagnetic solutions in the time and frequency domain using the PEEC circuit techniques. We aim to enhance the passivity by adding more passivization to the EM solution rather than using a post-processing technique which have to be used in the EM solver is not available. © 2013 IEEE.
Compromise Of Endogenous Neuropeptide W Production Abrogates The Dipsogenic And Pressor Effects Of Angiotensin Ii In Adult Male Rats, A. T. Pate, G. L.C. Yosten, W. K. Samson
Compromise Of Endogenous Neuropeptide W Production Abrogates The Dipsogenic And Pressor Effects Of Angiotensin Ii In Adult Male Rats, A. T. Pate, G. L.C. Yosten, W. K. Samson
Biological Sciences Faculty Research & Creative Works
Neuropeptide W (NPW), an endogenous ligand for the G-protein coupled receptor GPR7, is produced in neurones in the rat hypothalamus and brain stem known to be important in the control of food intake and the neuroendocrine response to stress. In previous studies, central administration of NPW during the light phase increased food and water intake and elevated prolactin and corticosterone levels in conscious, unrestrained male rats. In the present study, central administration of small-interfering RNA (siRNA) reduced NPW levels in the hypothalamus and resulted in a failure of angiotensin II to stimulate water drinking or increase mean arterial pressure. In …
Efficient Privacy-Preserving Range Queries Over Encrypted Data In Cloud Computing, Bharath K. Samanthula, Wei Jiang
Efficient Privacy-Preserving Range Queries Over Encrypted Data In Cloud Computing, Bharath K. Samanthula, Wei Jiang
Computer Science Faculty Research & Creative Works
With the growing popularity of data and service outsourcing, where the data resides on remote servers in encrypted form, there remain open questions about what kind of query operations can be performed on the encrypted data. In this paper, we focus on one such important query operation, namely range query. One of the basic security primitives that can be used to evaluate range queries is secure comparison of encrypted integers. However, the existing secure comparison protocols strongly rely on the encrypted bit-wise representations rather than on pure encrypted integers. Therefore, in this paper, we first propose an efficient method for …
Differences In Internet Usage Patterns With Stress And Anxiety Among College Students, Levi Malott, Sai Preethi Vishwanathan, Sriram Chellappan
Differences In Internet Usage Patterns With Stress And Anxiety Among College Students, Levi Malott, Sai Preethi Vishwanathan, Sriram Chellappan
Computer Science Faculty Research & Creative Works
Stress and Anxiety negatively affect mental health and can lead a number of debilitating impacts to overall health and wellbeing. In the recent past, adolescents are becoming increasingly afflicted with Stress and Anxiety. In this paper, we report our findings on a six-week study of 70 students at a college campus on associations between Stress and Anxiety with respect to Internet usage of students. Using Cisco NetFlow records, on-campus Internet usage of students was collected continuously and unobtrusively in a privacy-preserving manner. Using the Depression Anxiety and Stress Scale (DASS), students were separated based on normal scores and high scores …
Chc-Tscm: A Trustworthy Service Composition Method Based On An Improved Chc Genetic Algorithm, Cao Buqing, Liu Jianxun, Xiaoqing Frank Liu, Li Bing, Zhou Dong
Chc-Tscm: A Trustworthy Service Composition Method Based On An Improved Chc Genetic Algorithm, Cao Buqing, Liu Jianxun, Xiaoqing Frank Liu, Li Bing, Zhou Dong
Computer Science Faculty Research & Creative Works
Trustworthy service composition is an extremely important task when service composition becomes infeasible or even fails in an environment which is open, autonomic, uncertain and deceptive. This paper presents a trustworthy service composition method based on an improved Cross generation elitist selection, Heterogeneous recombination, Cataclysmic mutation (CHC) Trustworthy Service Composition Method (CHC-TSCM) genetic algorithm. CHC-TSCM firstly obtains the total trust degree of the individual service using a trust degree measurement and evaluation model proposed in previous research. Trust combination and computation then are performed according to the structural relation of the composite service. Finally, the optimal trustworthy service composition is …
Reducing Computational Workload Of Electromagnetic Scattered Fields From Electrically Large Quadratic Surface At High Frequency, Yu Mao Wu, Weng Cho Chew, Li (Lijun) Jun Jiang
Reducing Computational Workload Of Electromagnetic Scattered Fields From Electrically Large Quadratic Surface At High Frequency, Yu Mao Wu, Weng Cho Chew, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
We use the numerical steepest descent path (NSDP) method to calculate the highly oscillatory physical optics (PO) scattered fields on electrically large quadratic surfaces. The resultant phase behaviors of PO integrands are elliptic and hyperbolic on parabolic and saddle quadratic patches, respectively. The proposed method relies on deforming the integration path of the PO integral into the NSDPs on the complex plane. Numerical results of the PO scattered fields on these smooth conducting quadratic surfaces illustrate that the proposed NSDP method gains high accuracy while the workload is frequency independent. © 2013 IEEE.
Chipless Rfid Tags Based On Multiple Band-Rejected Planar Log-Periodic Antennas, Shulabh Gupta, Li (Lijun) Jun Jiang
Chipless Rfid Tags Based On Multiple Band-Rejected Planar Log-Periodic Antennas, Shulabh Gupta, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
A passive chipless Radio-frequency identification (RFID) tag is proposed based on the tailorable band-rejection property of the log-periodic (LP) antennas. The proposed tag principle is successfully demonstrated using full-wave simulations, where the absence and presence of the band-rejection in VSWR and thus radiation gain, is shown to carry the bit information. Due to the large number of dipole radiators on the LP aperture, the proposed tag can easily support large number of codes, providing a potential solution for limited number of bits in conventional chipless tags. © 2013 IEEE.
Degrees Of Freedom Of The Single Antenna Gaussian Wiretap Channel With A Helper Irrespective Of The Number Of Antennas At The Eavesdropper, Mohamed Nafea, Aylin Yener
Degrees Of Freedom Of The Single Antenna Gaussian Wiretap Channel With A Helper Irrespective Of The Number Of Antennas At The Eavesdropper, Mohamed Nafea, Aylin Yener
Electrical and Computer Engineering Faculty Research & Creative Works
A Gaussian wiretap channel with a helper, i.e., a cooperative jammer, is considered and its secure degrees of freedom (s.d.o.f.) is computed. Previous work showed that the s.d.o.f. is upper bounded by 1 over 2 in this model when all parties are equipped with one antenna each. In this paper, the more challenging scenario where the eavesdropper has multiple antennas is tackled. Relying on structured signaling and cooperative jamming, specifically, by real interference alignment, it is shown that s.d.o.f. of 1 over 2 is achievable irrespective of the number of antennas the eavesdropper may have as long as the cooperative …
Experimental And Theoretical Cross Sections For Molecular-Frame Electron-Impact Excitation-Ionization Of D₂, Julian C A Lower, Esam S M Ali, Susan M. Bellm, Erich Weigold, Allison L. Harris, Chuangang Ning, Don H. Madison
Experimental And Theoretical Cross Sections For Molecular-Frame Electron-Impact Excitation-Ionization Of D₂, Julian C A Lower, Esam S M Ali, Susan M. Bellm, Erich Weigold, Allison L. Harris, Chuangang Ning, Don H. Madison
Physics Faculty Research & Creative Works
We present both experimental and theoretical results for the dissociative ionization of D2 molecules induced by electron impact. Cross sections are determined in the molecular frame and are fully differential in the energies and emission angles of the dissociation fragments. Transitions are considered from the X1Σg+ electronic ground state of D2 to the 2sσg, 2pπu and 2pσu excited states of D2+. The experimental results are compared to calculations performed within the molecular four-body distorted-wave framework to describe the multicenter nature of the scattering process. The cross sections …
The Clustering Of Galaxies In The Sdss-Iii Baryon Oscillation Spectroscopic Survey: Weighing The Neutrino Mass Using The Galaxy Power Spectrum Of The Cmass Sample, Gong-Bo Zhao, Shun Saito, For Full List Of Authors, See Publisher's Website.
The Clustering Of Galaxies In The Sdss-Iii Baryon Oscillation Spectroscopic Survey: Weighing The Neutrino Mass Using The Galaxy Power Spectrum Of The Cmass Sample, Gong-Bo Zhao, Shun Saito, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We measure the sum of the neutrino particle masses using the three-dimensional galaxy power spectrum of the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey Data Release 9 the constant MASS (CMASS) galaxy sample. Combined with the cosmic microwave background, supernova and additional baryonic acoustic oscillation data, we find upper 95 per cent confidence limits (CL) of the neutrino mass ∑mν < 0.340 eV within a flat Λ cold dark matter (ΛCDM) background, and ∑mν< 0.821 eV, assuming a more general background cosmological model. The number of neutrino species is measured to be Neff = 4.308 ± 0.794 and 4.032+0.870 -0.894 for these two cases, respectively. We study and quantify the effect of several factors on the neutrino measurements, including the galaxy power spectrum bias model, the …
Chemical Eor, Ibnelwaleed A. Hussein, Yujun Feng, Baojun Bai
Chemical Eor, Ibnelwaleed A. Hussein, Yujun Feng, Baojun Bai
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
No abstract provided.
An Efficient Preconditioning Scheme For Eigenanalysis Of Inhomogeneously Loaded Rectangular Cavities, Qi I. Dai, Yat Hei Lo, Lijun Jiang, Weng Cho Chew
An Efficient Preconditioning Scheme For Eigenanalysis Of Inhomogeneously Loaded Rectangular Cavities, Qi I. Dai, Yat Hei Lo, Lijun Jiang, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
An efficient preconditioning scheme for the eigenanalysis of inhomogeneously loaded rectangular cavities is presented. Such structures are modeled with the finite-difference frequency-domain (FDFD) method, while the desired interior eigen-spectra are sought for by Arnoldi iterations with the shiftand-invert operation. In large scale problems, the inversion can only be performed iteratively. A preconditioner is constructed in order to accelerate the inversion. It can effectively shrink the spectrum of the governing matrix, and can be solved for by using fast discrete sine and cosine transforms (DST's and DCT's). The efficiency of this scheme is demonstrated by several numerical examples. © 2013 IEEE.
An Enhanced Mixed-Form Fast Multipole Algorithm Using Rotation Methods, Ling Ling Meng, Li (Lijun) Jun Jiang
An Enhanced Mixed-Form Fast Multipole Algorithm Using Rotation Methods, Ling Ling Meng, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, the broadband accuracy of the mixed-form fast multipole algorithm (MF-FMA) is improved by applying rotation techniques. Two kinds of rotation methods are employed respectively. One is the coordinate system rotation technique. The other one is the pseudospectral projection based on fast Fourier transform (FFT). Either of them has certain advantages depending on the number of multipoles. Through rotation, translation matrices become very sparse, which enables us to save the storage as well as the CPU time. Hence, we can increase the number of multipoles in the low frequency regime to shift up the transition region of MF-FMA. …
Light Sea Fermions In Electron-Proton And Muon-Proton Interactions, Ulrich D. Jentschura
Light Sea Fermions In Electron-Proton And Muon-Proton Interactions, Ulrich D. Jentschura
Physics Faculty Research & Creative Works
The proton radius conundrum [Pohl, Nature 466, 213 (2010)NATUAS0028-083610. 1038/nature09250 and Antognini, Science 339, 417 (2013)SCIEAS0036-807510.1126/ science.1230016] highlights the need to revisit any conceivable sources of electron-muon nonuniversality in lepton-proton interactions within the standard model. Superficially, a number of perturbative processes could appear to lead to such a nonuniversality. One of these is a coupling of the scattered electron into an electronic vacuum-polarization loop as opposed to a muonic one in the photon exchange of two valence quarks, which is present only for electron projectiles as opposed to muon projectiles. However, we show that this effect actually is part of …
Search For Long-Lived Gravitational-Wave Transients Coincident With Long Gamma-Ray Bursts, J. Aasi, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Search For Long-Lived Gravitational-Wave Transients Coincident With Long Gamma-Ray Bursts, J. Aasi, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
Long gamma-ray bursts (GRBs) have been linked to extreme core-collapse supernovae from massive stars. Gravitational waves (GW) offer a probe of the physics behind long GRBs. We investigate models of long-lived (∼10-1000 s) GW emission associated with the accretion disk of a collapsed star or with its protoneutron star remnant. Using data from LIGO's fifth science run, and GRB triggers from the Swift experiment, we perform a search for unmodeled long-lived GW transients. Finding no evidence of GW emission, we place 90% confidence-level upper limits on the GW fluence at Earth from long GRBs for three waveforms inspired by a …
Waveguiding Of Surface Phonon Polariton, Franklin Manene, Brian A. Lail, Edward C. Kinzel
Waveguiding Of Surface Phonon Polariton, Franklin Manene, Brian A. Lail, Edward C. Kinzel
Mechanical and Aerospace Engineering Faculty Research & Creative Works
Metal losses lead to unacceptably low propagation lengths in THz and LWIR waveguides. While SPP based waveguides provide relatively good confinement and attenuation in the near-IR and visible these are insufficiently bound to the surface in the THz and LWIR. We study using surface phonon polaritons for waveguiding at these frequencies. An eigenmode approach was applied to model a hybrid waveguide structure at λ=10.6 μm. The results show that phonon-coupled hybrid waveguide of silicon carbide BCB and gold exhibit enhanced propagation length and confinement at LWIR. © 2013 IEEE.
Three Dimensional Polarization Controllable Electromagnetic Cell, Bo Zhu, Weng Cho Chew, Lijun Jiang
Three Dimensional Polarization Controllable Electromagnetic Cell, Bo Zhu, Weng Cho Chew, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
We demonstrate an electromagnetic (EM) cell that can generate uniform electric field with three dimensional (3D) polarization dynamic control for the EM compatibility/interference (EMC/EMI) testing. 3D orthogonal slotline structures are designed and utilized to build the walls of the EM cell. By feeding the slotlines in phase and terminating them with matching loads, the uniform electric field similar to a standing wave is produced by two slotline modes propagating in opposite directions inside the cell. Microwave switches are integrated into the slotlines so that we can choose the operating slotline dynamically and change its orientation in a 3D manner by …
Modeling Radiated Emissions Through Shielding Boxes Based On The Tangential Electrical Field Samplings Over Openings, Ping Li, Li (Lijun) Jun Jiang
Modeling Radiated Emissions Through Shielding Boxes Based On The Tangential Electrical Field Samplings Over Openings, Ping Li, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
The radiation from radiators such as PCBs inside an enclosed shielding box with ventilation slots is an important issue for electromagnetic compatibility or interference characterizations. In this paper, a two-step process is proposed based on the equivalence principle and the electric field integral equation method to complete the radiation prediction. The tangential electric fields over the slots on shielding boxes are first sampled to be the equivalent magnetic currents radiated from internal PCBs. In the second step, to avoid the computation of complex nonanalytical dyadic Green's functions when the field radiation is computed directly from the equivalent source, the surface …
Co-Simulation Of Distributive And Lumped Systems Using The Discontinuous Galerkin Time Domain Finite Element Method, Ping Li, Li (Lijun) Jun Jiang
Co-Simulation Of Distributive And Lumped Systems Using The Discontinuous Galerkin Time Domain Finite Element Method, Ping Li, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
The signal integrity and power integrity analysis of 3D integrated circuits or other EMC/EMI systems usually separate the lumped circuit modeling and the distributive system modeling. However, due to the high density of integration, it is not proper to separate them in the modeling process anymore. In this paper, a hybrid electromagnetics (EM)-circuit simulator is proposed for incorporating multiport lumped circuit networks through their admittance matrices into the discontinuous Galerkin time-domain finite element method (DGTDFEM). The admittance matrix in the Laplace-domain can be derived analytically or obtained from network parameters such as S-parameters in the frequency domain. To convert frequency …