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Articles 1 - 14 of 14
Full-Text Articles in Engineering
Mechanical Properties And Tensile Failure Analysis Of Novel Bio-Absorbable Mg-Zn-Cu And Mg-Zn-Se Alloys For Endovascular Applications, Dharam Persaud, Noah Budiansky, Anthony J. Mcgoron
Mechanical Properties And Tensile Failure Analysis Of Novel Bio-Absorbable Mg-Zn-Cu And Mg-Zn-Se Alloys For Endovascular Applications, Dharam Persaud, Noah Budiansky, Anthony J. Mcgoron
Department of Biomedical Engineering Faculty Publications
In this paper, the mechanical properties and tensile failure mechanism of two novel bio-absorbable as-cast Mg-Zn-Se and Mg-Zn-Cu alloys for endovascular medical applications are characterized. Alloys were manufactured using an ARC melting process and tested as-cast with compositions of Mg-Zn-Se and Mg-Zn-Cu, being 98/1/1 wt.% respectively. Nanoindentation testing conducted at room temperature was used to characterize the elastic modulus (E) and surface hardness (H) for both the bare alloys and the air formed oxide layer. As compared to currently available shape memory alloys and degradable as-cast alloys, these experimental alloys possess superior as-cast mechanical properties that can increase their biocompatibility, …
Catalytic Studies Of Sodium Hydroxide And Carbon Monoxide Reaction, Sushant Kumar, Vadym Drozd, Surendra K. Saxena
Catalytic Studies Of Sodium Hydroxide And Carbon Monoxide Reaction, Sushant Kumar, Vadym Drozd, Surendra K. Saxena
Center for Study of Matter at Extreme Conditions
We have studied the effect of ball milling on alumina mixed nickel, magnetite and Raney nickel on the reaction: 2NaOH(s) + CO (g) = Na2CO3 (s) + H2 (g) and determined the optimum particle size for the catalysts. The best performance was shown by a 2 h ball milled Raney nickel with average crystallite size of 209 Å. This reaction serves the dual purpose of carbon sequestration and yielding hydrogen gas.
System-On-A-Chip (Soc) Based Hardware Acceleration In Register Transfer Level (Rtl) Design, Xinwei Niu
System-On-A-Chip (Soc) Based Hardware Acceleration In Register Transfer Level (Rtl) Design, Xinwei Niu
FIU Electronic Theses and Dissertations
Today, modern System-on-a-Chip (SoC) systems have grown rapidly due to the increased processing power, while maintaining the size of the hardware circuit. The number of transistors on a chip continues to increase, but current SoC designs may not be able to exploit the potential performance, especially with energy consumption and chip area becoming two major concerns. Traditional SoC designs usually separate software and hardware. Thus, the process of improving the system performance is a complicated task for both software and hardware designers. The aim of this research is to develop hardware acceleration workflow for software applications. Thus, system performance can …
Study On Pore Distribution And Formation Rule Of Sepiolite Mineral Nanomaterials, Qingguo Tang, Fei Wang, Mengran Tang, Jinsheng Liang, Chongyan Ren
Study On Pore Distribution And Formation Rule Of Sepiolite Mineral Nanomaterials, Qingguo Tang, Fei Wang, Mengran Tang, Jinsheng Liang, Chongyan Ren
Electrical and Computer Engineering Faculty Publications
Theoretical research and specific surface area analysis of nitrogen adsorption indicated that a lot of structural micropores exist in sepiolite minerals fibers. However, the microporous size, existing form, and the distribution relationship between microporous structures were not proved yet. In this paper, the section TEM samples of nanofibers were prepared on the basis of the metal embedding and cutting technique, and the inner structure of sepiolite nanofibers was observed by TEM. The results showed that sepiolite fibers have multiplayer structure similar to concentric circles, and many micropores with the size of about 2–5 nm are normal and parallel to the …
Room-Temperature Magnetic Ordering In Functionalized Graphene, Jeongmin Hong, Elena Bekyarova, Ping Liang, Walt A. De Heer, Robert C. Haddon, Sakhrat Khizroev
Room-Temperature Magnetic Ordering In Functionalized Graphene, Jeongmin Hong, Elena Bekyarova, Ping Liang, Walt A. De Heer, Robert C. Haddon, Sakhrat Khizroev
Electrical and Computer Engineering Faculty Publications
Despite theoretical predictions, the question of room-temperature magnetic order in graphene must be conclusively resolved before graphene can fully achieve its potential as a spintronic medium. Through scanning tunneling microscopy (STM) and point I-V measurements, the current study reveals that unlike pristine samples, graphene nanostructures, when functionalized with aryl radicals, can sustain magnetic order. STM images show 1-D and 2-D periodic super-lattices originating from the functionalization of a single sub-lattice of the bipartite graphene structure. Field-dependent super-lattices in 3-nm wide “zigzag” nanoribbons indicate local moments with parallel and anti-parallel ordering along and across the edges, respectively. Anti-parallel ordering is observed …
Deployment Of A Hybrid Multicast Switch In Energy-Aware Data Center Network: A Case Of Fat-Tree Topology, Tosmate Cheocherngngarn, Jean Andrian, Deng Pan
Deployment Of A Hybrid Multicast Switch In Energy-Aware Data Center Network: A Case Of Fat-Tree Topology, Tosmate Cheocherngngarn, Jean Andrian, Deng Pan
Electrical and Computer Engineering Faculty Publications
Recently, energy efficiency or green IT has become a hot issue for many IT infrastructures as they attempt to utilize energy-efficient strategies in their enterprise IT systems in order to minimize operational costs. Networking devices are shared resources connecting important IT infrastructures, especially in a data center network they are always operated 24/7 which consume a huge amount of energy, and it has been obviously shown that this energy consumption is largely independent of the traffic through the devices. As a result, power consumption in networking devices is becoming more and more a critical problem, which is of interest for …
Multilevel-3d Bit Patterned Magnetic Media With 8 Signal Levels Per Nanocolumn, Nissim Amos, John Butler, Beomseop Lee, Meir H. Shachar, Bing Hu, Yuan Tian, Jeongmin Hong, Davil Garcia, Rabee M. Ikkawi, Robert C. Haddon, Dmitri Litvinov, Sakhrat Khizroev
Multilevel-3d Bit Patterned Magnetic Media With 8 Signal Levels Per Nanocolumn, Nissim Amos, John Butler, Beomseop Lee, Meir H. Shachar, Bing Hu, Yuan Tian, Jeongmin Hong, Davil Garcia, Rabee M. Ikkawi, Robert C. Haddon, Dmitri Litvinov, Sakhrat Khizroev
Electrical and Computer Engineering Faculty Publications
This letter presents an experimental study that shows that a 3rd physical dimension may be used to further increase information packing density in magnetic storage devices. We demonstrate the feasibility of at least quadrupling the magnetic states of magnetic-based data storage devices by recording and reading information from nanopillars with three magnetically-decoupled layers. Magneto-optical Kerr effect microscopy and magnetic force microscopy analysis show that both continuous (thin film) and patterned triple-stack magnetic media can generate eight magnetically-stable states. This is in comparison to only two states in conventional magnetic recording. Our work further reveals that ferromagnetic interaction between magnetic …
Bme Annual Report 2011-2012, Department Of Biomedical Engineering, Florida International University
Bme Annual Report 2011-2012, Department Of Biomedical Engineering, Florida International University
Biomedical Engineering Department Annual Reports
No abstract provided.
Scheduling Medical Application Workloads On Virtualized Computing Systems, Javier Delgado
Scheduling Medical Application Workloads On Virtualized Computing Systems, Javier Delgado
FIU Electronic Theses and Dissertations
This dissertation presents and evaluates a methodology for scheduling medical application workloads in virtualized computing environments. Such environments are being widely adopted by providers of “cloud computing” services. In the context of provisioning resources for medical applications, such environments allow users to deploy applications on distributed computing resources while keeping their data secure. Furthermore, higher level services that further abstract the infrastructure-related issues can be built on top of such infrastructures. For example, a medical imaging service can allow medical professionals to process their data in the cloud, easing them from the burden of having to deploy and manage these …
On-Line Real-Time Service-Oriented Task Scheduling Using Tuf, Shuo Liu, Gang Quan, Shangping Ren
On-Line Real-Time Service-Oriented Task Scheduling Using Tuf, Shuo Liu, Gang Quan, Shangping Ren
Electrical and Computer Engineering Faculty Publications
We present our approach to real-time service-oriented scheduling problems with the objective of maximizing the total system utility. Different from the traditional utility accrual scheduling problems that each task is associated with only a single time utility function (TUF), we associate two different TUFs—a profit TUF and a penalty TUF—with each task, to model the real-time services that not only need to reward the early completions but also need to penalize the abortions or deadline misses. The scheduling heuristics we proposed in this paper judiciously accept, schedule, and abort real-time services when necessary to maximize the accrued utility. Our extensive …
Quality Of Experience Evaluation Of Voice Communication: An Affect-Based Approach, Abhishek Bhattacharya, Wanmin Wu, Zhenya Wang
Quality Of Experience Evaluation Of Voice Communication: An Affect-Based Approach, Abhishek Bhattacharya, Wanmin Wu, Zhenya Wang
School of Computing and Information Sciences
Voice communication systems such as Voice-over IP (VoIP), Public Switched Telephone Networks, and Mobile Telephone Networks, are an integral means of human tele-interaction. These systems pose distinctive challenges due to their unique characteristics such as low volume, burstiness and stringent delay/loss requirements across heterogeneous underlying network technologies. Effective quality evaluation methodologies are important for system development and refinement, particularly by adopting user feedback based measurement. Presently, most of the evaluation models are system-centric (Quality of Service or QoS-based), which questioned us to explore a user-centric (Quality of Experience or QoE-based) approach as a step towards the human-centric paradigm of system …
Bme Fiu Strategic Plan 2012-2017, Department Of Biomedical Engineering, Florida International University
Bme Fiu Strategic Plan 2012-2017, Department Of Biomedical Engineering, Florida International University
Biomedical Engineering Department Annual Reports
No abstract provided.
Gen-2 Hand-Held Optical Imager Towards Cancer Imaging: Reflectance And Transillumination Phantom Studies, Jean Gonzalez, Manuela Roman, Michael A. Hall, Anuradha Godavarty
Gen-2 Hand-Held Optical Imager Towards Cancer Imaging: Reflectance And Transillumination Phantom Studies, Jean Gonzalez, Manuela Roman, Michael A. Hall, Anuradha Godavarty
Department of Biomedical Engineering Faculty Publications
Hand-held near-infrared (NIR) optical imagers are developed by various researchers towards non-invasive clinical breast imaging. Unlike these existing imagers that can perform only reflectance imaging, a generation-2 (Gen-2) hand-held optical imager has been recently developed to perform both reflectance and transillumination imaging. The unique forked design of the hand-held probe head(s) allows for reflectance imaging (as in ultrasound) and transillumination or compressed imaging (as in X-ray mammography). Phantom studies were performed to demonstrate two-dimensional (2D) target detection via reflectance and transillumination imaging at various target depths (1–5 cm deep) and using simultaneous multiple point illumination approach. It was observed that …
Electrical Transport Properties Of Multilayered Single-Walled Carbon Nanotube Films, Yanli Zhao, Wenzhi Li
Electrical Transport Properties Of Multilayered Single-Walled Carbon Nanotube Films, Yanli Zhao, Wenzhi Li
Department of Physics
An improved layer-by-layer vacuum filtration method was adopted for the fabrication of single-walled carbon nanotube (SWCNT) films aiming at a series of SWCNT films with controllable thickness and density. The electrical transport properties of the multilayered SWCNT films have been investigated. With the constant film density, the decrease of the layer number of the SWCNT film results in an increase of the temperature coefficient of resistance (TCR). SWCNT film with 95% metallic nanotubes has shown a lower TCR than that of the SWCNT films with a low percentage of metallic nanotubes. The effect of thermal annealing and subsequent acid (HNO …