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Electrical and Computer Engineering

Department of Electrical and Computer Engineering: Faculty Publications

2007

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A Theoretical Framework For Quality-Aware Cross-Layer Optimized Wireless Multimedia Communications, Song Chi, Haohong Wang, Dalei Wu Nov 2007

A Theoretical Framework For Quality-Aware Cross-Layer Optimized Wireless Multimedia Communications, Song Chi, Haohong Wang, Dalei Wu

Department of Electrical and Computer Engineering: Faculty Publications

Although cross-layer has been thought as one of themost effective and efficient ways formultimedia communications over wireless networks and a plethora of research has been done in this area, there is still lacking of a rigorous mathematical model to gain indepth understanding of cross-layer design tradeoffs, spanning from application layer to physical layer. As a result, many existing cross-layer designs enhance the performance of certain layers at the price of either introducing side effects to the overall system performance or violating the syntax and semantics of the layered network architecture. Therefore, lacking of a rigorous theoretical study makes existing cross-layer …


Enhanced Raman Scattering By Self-Assembled Silica Spherical Microparticles, Kaijun Yi, H. Wang, Yongfeng Lu, Z. Y. Yang Mar 2007

Enhanced Raman Scattering By Self-Assembled Silica Spherical Microparticles, Kaijun Yi, H. Wang, Yongfeng Lu, Z. Y. Yang

Department of Electrical and Computer Engineering: Faculty Publications

A technique was developed to achieve enhanced Raman scattering of the silicon photon modes using closely packed micro- and submicron silica spherical particles. Investigation on the particle-size dependence of Raman enhancement revealed that the strongest enhancement occurs when the particle diameter is equal to the spot size of the incident laser beam. Calculations using the OPTIWAVETM software based on the finite difference time domain algorithm under the perfectly matched layer boundary conditions were carried out. The results showed that photonic nanojets are formed in the vicinity outside the particles along the propagation direction of incident light. It was found …


Rotating Or Rotatable Compensator Spectroscopic Ellipsometer System Including Multiple Element Lenses, Blaine D. Johs, Martin M. Liphardt, Jeffrey S. Hale, Craig M. Herzinger, Steven E. Green, Ping He, John A. Woollam Mar 2007

Rotating Or Rotatable Compensator Spectroscopic Ellipsometer System Including Multiple Element Lenses, Blaine D. Johs, Martin M. Liphardt, Jeffrey S. Hale, Craig M. Herzinger, Steven E. Green, Ping He, John A. Woollam

Department of Electrical and Computer Engineering: Faculty Publications

Disclosed are spectroscopic ellipsometer systems which include polarizer and analyzer elements which remain fixed in position during data acquisition, and at least one continuously rotating or step-wise rotatable compensator which transmits an electromagnetic beam therethrough and imposes a continuously variable or plurality of sequentially discrete polarization states on a beam of electromagnetic radiation; and at least one multiple element lens which also transmits the electromagnetic beam therethrough.


Spherical Silicon-Shell Photonic Band Gap Structures Fabricated By Laser-Assisted Chemical Vapor Deposition, H. Wang, Z. Y. Yang, Yongfeng Lu Feb 2007

Spherical Silicon-Shell Photonic Band Gap Structures Fabricated By Laser-Assisted Chemical Vapor Deposition, H. Wang, Z. Y. Yang, Yongfeng Lu

Department of Electrical and Computer Engineering: Faculty Publications

Laser-assisted chemical vapor deposition was applied in fabricating three-dimensional (3D) spherical-shell photonic band gap (PBG) structures by depositing silicon shells covering silica particles, which had been self-assembled into 3D colloidal crystals. The colloidal crystals of self-assembled silica particles were formed on silicon substrates using the isothermal heating evaporation approach. A continuous wave Nd:YAG laser (1064 nm wavelength) was used to deposit silicon shells by thermally decomposing disilane gas. Periodic silicon-shell/silica-particle PBG structures were obtained. By removing the silica particles enclosed in the silicon shells using hydrofluoric acid, hollow spherical silicon-shell arrays were produced. This technique is capable of fabricating structures …


C-Fos As A Proapoptotic Agent In Trail-Induced Apoptosis In Prostate Cancer Cells, Xiaoping Zhang, Liang Zhang, Hongmei Yang, Xu Huang, Hasan H. Otu, Towia A. Libermann, William C. Dewolf, Roya Khosravi-Far, Aria F. Olumi Jan 2007

C-Fos As A Proapoptotic Agent In Trail-Induced Apoptosis In Prostate Cancer Cells, Xiaoping Zhang, Liang Zhang, Hongmei Yang, Xu Huang, Hasan H. Otu, Towia A. Libermann, William C. Dewolf, Roya Khosravi-Far, Aria F. Olumi

Department of Electrical and Computer Engineering: Faculty Publications

Tumor necrosis factor–related apoptosis-inducing ligand (TRAIL)/Apo-2L promotes apoptosis in cancer cells while sparing normal cells. Although many cancers are sensitive to TRAIL-induced apoptosis, some evade the proapoptotic effects of TRAIL. Therefore, differentiating molecular mechanisms that distinguish between TRAIL-sensitive and TRAIL-resistant tumors are essential for effective cancer therapies. Here, we show that c-Fos functions as a proapoptotic agent by repressing the antiapoptotic molecule c-FLIP(L). c-Fos binds the c-FLIP(L) promoter, represses its transcriptional activity, and reduces c-FLIP(L) mRNA and protein levels. Therefore, c-Fos is a key regulator of c-FLIP(L), and activation of c-Fos determines whether a cancer cell will undergo cell death …


Serum Proteome Profiling Detects Myelodysplastic Syndromes And Identifies Cxc Chemokine Ligands 4 And 7 As Markers For Advanced Disease, Manuel Aivado, Dimitrios Spentzos, Ulrich Germing, Gil Alterovitz, Xiao-Ying Meng, Franck Grall, Aristoteles A. N. Giagounidis, Giannoula Klement, Ulrich Steidl, Hasan H. Otu, Akos Czibere, Wolf C. Prall, Christof Iking-Konert, Michelle Shayne, Marco F. Ramoni, Norbert Gattermann, Rainer Haas, Constantine S. Mitsiades, Eric T. Fung, Towia A. Libermann Jan 2007

Serum Proteome Profiling Detects Myelodysplastic Syndromes And Identifies Cxc Chemokine Ligands 4 And 7 As Markers For Advanced Disease, Manuel Aivado, Dimitrios Spentzos, Ulrich Germing, Gil Alterovitz, Xiao-Ying Meng, Franck Grall, Aristoteles A. N. Giagounidis, Giannoula Klement, Ulrich Steidl, Hasan H. Otu, Akos Czibere, Wolf C. Prall, Christof Iking-Konert, Michelle Shayne, Marco F. Ramoni, Norbert Gattermann, Rainer Haas, Constantine S. Mitsiades, Eric T. Fung, Towia A. Libermann

Department of Electrical and Computer Engineering: Faculty Publications

Myelodysplastic syndromes (MDS) are among the most frequent hematologic malignancies. Patients have a short survival and often progress to acute myeloid leukemia. The diagnosis of MDS can be difficult; there is a paucity of molecular markers, and the pathophysiology is largely unknown. Therefore, we conducted a multicenter study investigating whether serum proteome profiling may serve as a noninvasive platform to discover novel molecular markers for MDS. We generated serum proteome profiles from 218 individuals by MS and identified a profile that distinguishes MDS from non-MDS cytopenias in a learning sample set. This profile was validated by testing its ability to …


Work In Progress - Increasing Transfer Student Enrollment, Retention And Graduation Through The Strengthening Transitions Into Engineering Programs, Stephanie G. Adams, Lance C. Pérez, John J. Ballard Jan 2007

Work In Progress - Increasing Transfer Student Enrollment, Retention And Graduation Through The Strengthening Transitions Into Engineering Programs, Stephanie G. Adams, Lance C. Pérez, John J. Ballard

Department of Electrical and Computer Engineering: Faculty Publications

Large populations of students are matriculating to community colleges (CC). However, transferring from a CC to 4-year undergraduate engineering degree program is often quite difficult. There are few, if any, engineering courses offered at the CCs. In addition, long prerequisite chains reduce many transfer students to Freshman or Sophomore status, even though they have had two years of post-secondary education. The University of Nebraska-Lincoln (UNL), Strengthening Transitions into Engineering Programs (STEP) is a program designed to facilitate the transfer of CC students to undergraduate baccalaureate engineering degree programs. The program consists of four engineering courses taught at the CCs with …