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Compact Dual-Band Bandpass Filter Based On Fractal Stub-Loaded Resonator, Hadi T. Ziboon, Jawad K. Ali 2017 Department of Electrical Engineering, University of Technology, Iraq

Compact Dual-Band Bandpass Filter Based On Fractal Stub-Loaded Resonator, Hadi T. Ziboon, Jawad K. Ali

Professor Jawad K. Ali

Fractal geometries have shown to be a suitable choice for the antenna and microwave circuit designers to produce compact size microwave devices and components. Moreover, the multimode resonators are found advantageous in the design of reduced size multiband bandpass filters. In this paper, a stub loaded resonator (SLR) based on modified Minkowski fractal geometry, is suggested to produce a compact microstrip bandpass filter with dual-band response for wireless communication applications. Based on the second iteration Minkowski fractal geometry, dual-band compact microstrip BPF has been presented. The proposed filter structure is composed of two fractal based symmetrical SLRs. The filter structure ...


Compact Dual-Mode Microstrip Band Reject Filter Based On Koch Fractal Geometry, Hayder S. Ahmed, Ali J. Salim, Jawad K. Ali 2017 Department of Electrical, University of Technology, Iraq

Compact Dual-Mode Microstrip Band Reject Filter Based On Koch Fractal Geometry, Hayder S. Ahmed, Ali J. Salim, Jawad K. Ali

Professor Jawad K. Ali

In this paper, a new fractal-based microstrip dual-mode band stop filter (BSF) has been
presented. The proposed filter structure is mainly based on that of the triangular patch resonators
with an embedded slit structure. The Koch fractal geometry has been applied to the uncoupled side
lengths of the triangular patch resonator. The filter structure has been modeled, and its performance
is evaluated using the commercially available EM simulator, Sonnet. Results reveal that the
resulting dual-mode response depends heavily on the uncoupled side lengths of the triangular patch
resonator. A parametric study has been conducted to explore the effect of the ...


A Compact Dual-Band Slot Antenna Based On Koch Fractal Snowflake Annular Ring, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Hussam Al-Saedi, Jawad K. Ali 2017 Department of Electrical Engineering, University of Technology, Iraq

A Compact Dual-Band Slot Antenna Based On Koch Fractal Snowflake Annular Ring, Mahmood T. Yassen, Mohammed R. Hussan, Hussain A. Hammas, Hussam Al-Saedi, Jawad K. Ali

Professor Jawad K. Ali

This paper presents the design of a compact dual-band slot antenna for use in the
recently available wireless communication applications. The slot structure of the proposed antenna
is based on an annular slot-ring with Koch snowflake fractal geometry of the third iteration. The
antenna slot structure has been etched on the ground plane of a substrate with relative permittivity
of 4.5 and 1.524 mm thickness. On the other side of the substrate, a 50-Ohm microstrip line has
been etched as the antenna feed structure. The proposed antenna has a compact size of (40 × 40 ×
1.524) mm3. Simulation ...


Unmanned Aerial Vehicle Tracking System With Out-Of-Sequence Measurement In A Discrete Time-Delayed Extended Kalman Filter, Roque Lora 2017 Utah State University

Unmanned Aerial Vehicle Tracking System With Out-Of-Sequence Measurement In A Discrete Time-Delayed Extended Kalman Filter, Roque Lora

All Graduate Theses and Dissertations

The goal of this thesis is to extend the delayed Kalman filter so it can be used with non-linear systems and that it can handle randomized delays on the measurements. In the particular case of this study, the filter is used to estimates the states of an unmanned aerial system. The outputs of the filter are used to point an antenna and a camera towards a UAS. Different scenarios are simulated for the purpose of comparing the efficiency of this technique in various situations.


Role Of Antenna Modes And Field Enhancement In Second Harmonic Generation From Dipole Nanoantennas, Domenico de Ceglia, Maria Antonietta Vincenti, Costantino De Angelis, Andrea Locatelli, Joseph W. Haus, Michael Scalora 2017 Charles M. Bowden Research Center

Role Of Antenna Modes And Field Enhancement In Second Harmonic Generation From Dipole Nanoantennas, Domenico De Ceglia, Maria Antonietta Vincenti, Costantino De Angelis, Andrea Locatelli, Joseph W. Haus, Michael Scalora

Joseph W Haus

We study optical second harmonic generation from metallic dipole antennas with narrow gaps. Enhancement of the fundamental-frequency field in the gap region plays a marginal role on conversion efficiency. In the symmetric configuration, i.e., with the gap located at the center of the antenna axis, reducing gap size induces a significant red-shift of the maximum conversion efficiency peak. Either enhancement or inhibition of second-harmonic emission may be observed as gap size is decreased, depending on the antenna mode excited at the harmonic frequency. The second-harmonic signal is extremely sensitive to the asymmetry introduced by gap’s displacements with respect ...


Relaxed Decidability And The Robust Semantics Of Metric Temporal Logic, Houssam Abbas 2017 University of Pennsylvania

Relaxed Decidability And The Robust Semantics Of Metric Temporal Logic, Houssam Abbas

Real-Time and Embedded Systems Lab (mLAB)

Relaxed notions of decidability widen the scope of automatic verification of hybrid systems. In quasi-decidability and $\delta$-decidability, the fundamental compromise is that if we are willing to accept a slight error in the algorithm's answer, or a slight restriction on the class of problems we verify, then it is possible to obtain practically useful answers. This paper explores the connections between relaxed decidability and the robust semantics of Metric Temporal Logic formulas. It establishes a formal equivalence between the robustness degree of MTL specifications, and the imprecision parameter $\delta$ used in $\delta$-decidability when it is used to ...


Women In It: Be The Change, Marcia L. Dority Baker 2017 University of Nebraska-Lincoln

Women In It: Be The Change, Marcia L. Dority Baker

Publications from Information Technology Services

The influence of established women in IT — specifically Florence Hudson and Melissa Woo — encouraged a librarian to apply for a position in Information Technology Services at the University of Nebraska–Lincoln.

A hands-on approach to planning the IT Leadership conference developed a strong collaborative network that also helped grow attendance.

Paying attention to the pros and cons of the 2016 conference guided the planners in modifying their approach to the upcoming October 2017 conference and its focus on diversity and inclusion.

A main goal for future IT Leadership conferences focusing on women and diversity in IT is providing attendees with ...


T1, T2, And Off-Resonance Mapping Using A Non-Linear Least-Squares Fit Of The Bssfp Signal, Meredith Taylor, Joseph Valentine, Steven Whitaker, Neal Bangerter 2017 Brigham Young University

T1, T2, And Off-Resonance Mapping Using A Non-Linear Least-Squares Fit Of The Bssfp Signal, Meredith Taylor, Joseph Valentine, Steven Whitaker, Neal Bangerter

Biomedical Engineering Western Regional Conference

The mapping of MR relaxation times has found a broad variety of applications in the study of disease. Unfortunately, the gold standards for acquiring T1 and T2 maps require long scan times, and are therefore more suited to 2D acquisitions with limited slices. For reasonable scan times, resolution is limited making these scans less useful for showing fine morphological detail. A rapid 3D sequence at higher resolutions that could be used to provide both morphological detail and relaxation time maps would be particularly useful. We propose a technique with potential to provide simultaneous band-free 3D datasets and estimates ...


Bssfp Elliptical Signal Model With Grappa Parallel Imaging, Grayson Tarbox, Joseph Valentine, Meredith Taylor, Neal Bangerter 2017 Brigham Young University

Bssfp Elliptical Signal Model With Grappa Parallel Imaging, Grayson Tarbox, Joseph Valentine, Meredith Taylor, Neal Bangerter

Biomedical Engineering Western Regional Conference

In magnetic resonance imaging, balanced steady-state free precession acquisition using the elliptical signal model geometrical solution can be combined with a GRAPPA parallel imaging reconstruction that preserves phase information to shorten scan times.


Water Fat Separation With Multiple-Acquisition Bssfp Mri, Michael A. Mendoza 8232743, Joseph Valentine, Neal Bangerter 2017 Brigham Young University

Water Fat Separation With Multiple-Acquisition Bssfp Mri, Michael A. Mendoza 8232743, Joseph Valentine, Neal Bangerter

Biomedical Engineering Western Regional Conference

We present a technique that combines the advantages of bSSFP MRI with Dixon reconstruction in order to produce robust water fat separation with high SNR in a short imaging time, while simultaneously reducing banding artifacts that traditionally degrade image quality.


3d Printed Microfluidics, Hua Gong, Clayton Ramstedt, Adam T. Woolley, Gregory P. Nordin 2017 Brigham Young University

3d Printed Microfluidics, Hua Gong, Clayton Ramstedt, Adam T. Woolley, Gregory P. Nordin

Biomedical Engineering Western Regional Conference

3D printing for microfluidic (lab-on-a-chip) devices


An X Band Patch Antenna Integrated With Commercial Triple-Junction Space Solar Cells, Taha Yekan, Reyhan Baktur 2017 Utah State University

An X Band Patch Antenna Integrated With Commercial Triple-Junction Space Solar Cells, Taha Yekan, Reyhan Baktur

CEE Student Publications and Presentations

An X band patch antenna was integrated on top of the cover glass of commercial space-certified solar cell and was studied for understanding the interaction between the solar cell and the antenna. It was found that the solar cell acts as a lossy substrate for the antenna and reduces the gain of the antenna by about 2 dB, and such a reduction remains consistent for different working states of the solar cell. The patch antenna reduces the efficiency of the solar cells because it blocks light, however, at 10 GHz, the impact of a patch antenna alone to the solar ...


Stakeholder Outcomes In A Wind Turbine Investment; Is The Irish Energy Policy Effective In Reducing Ghg Emissions By Promoting Small-Scale Embedded Turbines In Sme's?, Tony Kealy 2017 Dublin Institute of Technology

Stakeholder Outcomes In A Wind Turbine Investment; Is The Irish Energy Policy Effective In Reducing Ghg Emissions By Promoting Small-Scale Embedded Turbines In Sme's?, Tony Kealy

Articles

As a member state of the European Union (EU), Ireland has adopted an energy policy which includes promoting wind powered electricity generators as an economically viable, GHG-reducing, alternative to environmentally damaging fossil-fuel driven electrical generators. This longitudinal, inductive in-depth study investigates the outcomes for the government and other stakeholders involved in a wind turbine project investment by a Small-to-Medium-Enterprise (SME) based in rural Ireland. A case study research methodology is used to acquire and analyse quantitative numerical data from multiple sources including electrical power and energy meters, historical electricity bills and company sustainability reports. The study found that the installation ...


Data Predictive Control For Building Energy Management, Achin Jain, Madhur Behl, Rahul Mangharam 2017 University of Pennsylvania

Data Predictive Control For Building Energy Management, Achin Jain, Madhur Behl, Rahul Mangharam

Real-Time and Embedded Systems Lab (mLAB)

Decisions on how to best optimize energy systems operations are becoming ever so complex and conflicting, that model-based predictive control (MPC) algorithms must play an important role. However, a key factor prohibiting the widespread adoption of MPC in buildings, is the cost, time, and effort associated with learning first-principles based dynamical models of the underlying physical system. This paper introduces an alternative approach for implementing finite-time receding horizon control using control-oriented data-driven models. We call this approach Data Predictive Control (DPC). Specifically, by utilizing separation of variables, two novel algorithms for implementing DPC using a single regression tree and with ...


Ocean Renewable Power Company, James Donegan 2017 Ocean Renewable Power Company

Ocean Renewable Power Company, James Donegan

MARENER 2017

No abstract provided.


Lighting Standards For Ship And Alternative Solutions For Energy Efficiency, Efe Akyurek 2017 Istanbul Technical University

Lighting Standards For Ship And Alternative Solutions For Energy Efficiency, Efe Akyurek

MARENER 2017

Lighting has an important role amongst human life. In this respect, an adequate lighting on board gives moral, motivation also helps to improve safety and security for ships’ crew. This paper aims to both determine an adequate lighting for crew and bring energy efficiency with optimal lighting considering existing regulations on shipboard lighting. After a brief introduction, on the first part the preferred lighting tendencies to be discussed at maritime regulatory base including SOLAS, MLC with comparing ILO 92/133 Conventions. The second part initially defines optimal lighting for crew accommodation and working areas with demonstrating an example on a ...


Overcoming The Challenges To Maritime Energy Efficiciency In The Caribbean Region, Deniece Aiken 2017 Caribbean Maritime Institute

Overcoming The Challenges To Maritime Energy Efficiciency In The Caribbean Region, Deniece Aiken

MARENER 2017

Maritime energy efficiency in the Caribbean appears to be predicated on two key requirements; regulatory controls over the vessels operating in the region and the availability and use of efficient technology. While many Caribbean territories have ratified MARPOL AnnexVI, implementation of the standards therein, presents challenges that are familiar to maritime administrators of the region. These challenges include insufficient resources and inadequate implementation of relevant standards. These issues have traditionally plagued the region. The paucity of data and monitoring in this part of the world also contributes to ineffective policy interventions. There is also a need to identify the gap ...


The Law Of Conservation Of Energy Towards Defining Maritime Cluster Dynamics, Peter J. Stavroulakis, Stratos Papadimitriou, Ioannis Koliousis 2017 University of Piraeus

The Law Of Conservation Of Energy Towards Defining Maritime Cluster Dynamics, Peter J. Stavroulakis, Stratos Papadimitriou, Ioannis Koliousis

MARENER 2017

Industrial clusters have for many decades been considered as the stepping stone for regional and national competitiveness, due to the fact that within these systems of economies, many propitious qualities seem to flourish. Competition and cooperation are witnessed to complement one another, firms can thrive through the marvels of knowledge creation and innovation, and positive externalities are seen to blossom into an interconnected system of collective prosperity. This system bears semblance to many occurrences in nature, and thus can guide the reflection of natural dynamics that may pave an industrial cluster’s threads. Maritime clusters in particular, are distinct vanguards ...


Costs And Benefits Of Lng Economic Development In The Baltic And Arctic Regions, Fabio Ballini, Lawrence Kuroshi 2017 World Maritime University

Costs And Benefits Of Lng Economic Development In The Baltic And Arctic Regions, Fabio Ballini, Lawrence Kuroshi

MARENER 2017

Global warming is becoming increasingly evident. However, rising temperatures also offer new economic opportunities, such as new maritime routes in previously ice-locked waters. Valuable minerals in the Arctic region are also becoming more accessible. Maritime stakeholders are therefore seeking to operate in this remote region safely and efficiently. Accommodating these developments from a regulatory standpoint, IMO has amended the International Convention for the Prevention of Pollution from Ships (MARPOL) to include Chapter 9 of Annex I, prohibiting the use of heavy-grade marine fuels as well as heavy-duty oils as cargo carriage in the seas beyond 60th parallel south. In addition ...


Energy Consumption Of Small Scale Fishing Vessel Operations In Indonesia: A Case Study In Palabuhanratu, Indonesia, Vita R. Kurniawati, Richard W. Birmingham, Alan J. Murphy 2017 Newcastle University, UK

Energy Consumption Of Small Scale Fishing Vessel Operations In Indonesia: A Case Study In Palabuhanratu, Indonesia, Vita R. Kurniawati, Richard W. Birmingham, Alan J. Murphy

MARENER 2017

About 79% of the global fishing fleet is small motorized boats typically operating in coastal areas, supplying local markets, and contributing to human well-being through food supplies and economic development. For example, Indonesian fisheries which predominantly are artisanal fishing, have supported 54% of animal protein intake, accounted for 2% of employment level and increased the fishermen’s prosperity index by 2.44%. However, they cause significant environmental impacts including fish resource depletion and intensive energy use. Balancing the benefits and challenges, sustainably managing these fishing operations is an important yet complex task given the requirements to proportionally account for fish ...


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