Engineering Commons^™

High-Order Mooring Simulations For Increased Accuracy In Wave Energy Applications, Johannes Palm, Claes Eskilsson, Lars Bergdahl

MARENER 2017

The prevailing simulation technique for floating wave energy converters (WECs) is to use the linear hydrodynamics in convolution form to solve for the motion of the floating structure. This allows for very fast time domain simulations with the possibility to include non-linear reaction forces from e.g. moorings and power take off (PTO). Although its accuracy for very large motion amplitudes is debated (Yu and Li 2015, Palm 2015), it is the best method available to make long-term simulations of WEC response.

Brown and Mavrakos (1999) showed a big difference in mooring response depending on how the mooring cables of marine …

The Potential Of Elephant Grass (Pennisetum Purpureum Schum), An African Indigenous Grass, In Bioethanol Production: A Decarbonization Alternative For The Shipping Industry, Lawrence Kuroshi Phd

MARENER 2017

While it is true that fossil fuel based energy which is non-renewable has contributed immensely to global economic growth, it has brought with its usage the emission of carbon dioxide (CO2), a principal greenhouse gas. Studies using business as usual (BAU) model has predicted that the emission of CO2 into the atmosphere will increase by 50 to 250% by the year 2050 with perhaps a commensurate increase in the global carbon footprint. The shipping industry has remained a major contributor to this global carbonization. Concern over this increasing concentration of carbon dioxide in the atmosphere, has intensified interests in developing …

Numerical Simulations On Added Resistance And Ship Motions Of Kvlcc2 In Waves, Mingyu Kim

MARENER 2017

No abstract provided.

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 of …

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

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 resources, fishing …

Energy Awareness – Do We Need A Definition In Order To Implement It Onboard?, Signe Jensen

MARENER 2017

Energy optimization and the awareness about the issue has become an important topic in the maritime industry. An energy management study from 2015 performed by DNV GL, shows that energy awareness has moved from rank fifteen to be the most important measure to be implemented as a success factor to realize actual savings. However - What exactly is energy awareness, and how can it be defined and implemented? Are Ship Energy Efficiency Management Plans (SEEMP), noon reports and decision support software the right tools to raise awareness and improve energy efficiency for all shipping companies. Previous studies show that smaller …

Tsu Faculty Research Database-Jan 2017, David Owerbach

Office of Research Institutional Research and Scholarship

Research interests and selected publications from 230 Texas Southern University faculty have been updated in Jan 2017. Faculty from Public Affairs, the College of Science, Engineering and Technology, the College of Pharmacy and Health Sciences, the College of Education, the College of Business, the College of Liberal Arts and Behavioral Sciences, the Law School and the School of Communications are included.

Dr. James L. Moore Presents Bpe Program Seminar At Usu | College Of Engineering, Usu College Of Engineering

College of Engineering News

Dr. James L. Moore III will visit Utah State University on Jan. 30 as the guest speaker at a seminar on the Broadening Participation in Engineering (BPE) program.

Apertureless Near-Field Scanning Probes Based On Graphene Plasmonics, Hamid T. Chorsi, John X. Zhang

Dartmouth Scholarship

We present a novel approach in designing high-throughput high-resolution apertureless near-field scanning probes with enhanced nanofocusing based on graphene plasmonics. Extremely localized plasmons on graphene are mingled with nanofocusing of surface plasmon polaritons to confine and steer the plasmon waves into the apex of a near-field scanning optical microscopy tip. The Fermi level, localized emission sites on graphene, and the angle of excitation play a critical role in exciting graphene surface plasmons on the lateral walls of the designed conical probes. The optimized probes feature full-width at half-maximum (FWHM) around 25 nm, which is at least two times smaller than …

Electrical & Computer Engineering News, Georgia Southern University

Electrical & Computer Engineering: News & Publications (2014-2023)

• Dr. Sungkyun Lim and ARRIS, Inc. Continue Research Partnership

Application Of Experimental Investigation Of Forming Limit Diagrams Of Tailor Welded Blanks In Ship Hull Design, Mehdi Sepasi

MARENER 2017

No abstract provided.

Usu College Of Engineering Development Director Sworn Into Legislature | College Of Engineering, Usu College Of Engineering

College of Engineering News

The Utah State Legislature welcomed several new lawmakers to its ranks on Monday, including Val K. Potter, the executive director of development at Utah State University’s College of Engineering.

Fischer–Tropsch Synthesis: Effect Of Ammonia On Product Selectivities For A Pt Promoted Co/Alumina Catalyst, Venkat Ramana Rao Pendyala, Wilson D. Shafer, Gary Jacobs, Michela Martinelli, Dennis E. Sparks, Burtron H. Davis

Center for Applied Energy Research Faculty and Staff Publications

The effects of co-fed ammonia in synthesis gas on the activity and product selectivities of a typical cobalt catalyst (0.5% Pt–25% Co/Al₂O₃) were investigated during the Fischer–Tropsch synthesis using a continuously stirred tank reactor (CSTR). The product selectivities were compared at a similar CO conversion level for various concentrations (10–1000 ppmv) of ammonia, as well as clean (un-poisoned) conditions. The addition of 10–1000 ppmv ammonia (concentration of ammonia with respect to the syngas feed) significantly decreased activity; the percentage of deactivation was similar (∼40%) for the various concentrations of ammonia used. At similar CO conversions, the …

Integrated Stem Through Tumblewing Gliders, Scott R. Bartholomew

Faculty Publications

Teachers have the opportunity to use technology and engineering design problems to engage students in integrated STEM education. “Tumblewing” gliders are easy-to-make paper gliders that can challenge, excite, and engage students. As students emphasize the practices of science and engineering while completing a tumblewing design challenge, they will engage in both scientific inquiry and the engineering design process.

Advances In Composite Manufacturing Of Helicopter Parts, Tobias A. Weber, Hans-Joachim K. Ruff-Stahl

International Journal of Aviation, Aeronautics, and Aerospace

This study investigates and compares different methods for improving standard autoclave composite manufacturing in order to find suitable approaches to a more efficient composite production. The goal is not only a reduction in manufacturing times and costs but also quality enhancement. Improved part quality while decreasing costs enables a manufacturer of composite parts to expand its market share, especially in the helicopter market, which has been constantly shrinking over the last two years. Various approaches such as improved tooling technology, the use of automated systems for lamination as well as outsourcing are examined to provide an overview of possible advancements …

Integration Of Military Unmanned Aerial Systems (Uas) Into The Us National Airspace System: The Relationship Between Uas Accidents And Safety Concerns, Omar J. Hamilton, Timm J. Bliss, Chad Depperschmidt

International Journal of Aviation, Aeronautics, and Aerospace

The purpose of this study was to discover if a relationship existed between the most common safety concerns and the most common UAS accidents with regards to the integration of military unmanned aerial systems (UAS) into the National Airspace System (NAS). This study examined the most common causes of UAS accidents over a five-year period, the level of safety concerns and common concerns from UAS military pilots and sensor operators. The quantitative data was derived from the Air Force, Navy and Army Safety Offices, while the qualitative data was derived from an online questionnaire and follow-up interviews of US Air …

Reading And Engineering: Elementary Students’ Co-Application Of Comprehension Strategies And Engineering Design Processes, Amy Wilson-Lopez, Stacie Gregory, Victor Larsen

Journal of Pre-College Engineering Education Research (J-PEER)

For decades, researchers have asserted that K–12 teachers should embed reading comprehension instruction within each academic discipline, including ‘‘technical subjects’’ such as engineering. Recently, this assertion has become a source of controversy among researchers and practitioners who believe that time spent on teaching reading comprehension strategies may detract from time spent on more authentic activities such as engineering design. The purpose of this exploratory study was to investigate whether and how elementary students’ applications of comprehension strategies overlapped with their application of engineering design processes. The authors provided comprehension strategy instruction to 57 third- and fifth-grade students as they read …

A Simple And Cost-Effective Epon-Based Next Generation Mobile Backhaul Ran Architecture, Ajaz Sana, Syed R. Zaidi, Shahab Hussain, Mohammad Nizamuddin

Publications and Research

This study proposes a novel, simple and cost-effective PON-based next generation mobile backhaul RAN architecture that enables redistribution of some of the intelligence currently centralized in the Mobile Packet Core (MPC) platform out into the access nodes of the RAN. Specifically, this work proposes a fully distributed ring-based EPON architecture that enables the support of a converged PON-4G/5G mobile WiMAX/LTE access networking transport infrastructure to seamlessly backhaul both mobile and wireline multimedia traffic and services.

Engineering A Fluorescent Protease Sensor For In Vivo Protein Detection, Thomas C. Kinard

Honors Scholar Theses

This report details the results of an ongoing project to engineer a mutant form of Red Fluorescent Protein (RFP) variant mCherry that acts as a real-time in vivo protease sensor. The sought-after mutant only becomes fluorescent when exposed to Tobacco Etch Virus (TEV) Protease, this system’s model protease. This will be accomplished via the insertion of the TEV Protease Recognition Site (TEV-PRS) in such a position that, before cleavage, will prevent the protein from folding to fluorescent conformation, but upon cleavage, will allow for fluorescent conformation to occur. The cylindrical structure of the protein, composed of beta-pleated sheets, contains “loops” …

Catalytic Upgrading Of Biogas To Fuels: Role Of Reforming Temperature, Oxidation Feeds, And Contaminants, Nada Elsayed

USF Tampa Graduate Theses and Dissertations

Global energy demands are constantly increasing and fossil fuels are a finite resource. The shift towards alternative, more renewable and sustainable fuels is inevitable. Furthermore, the increased emissions of greenhouse gases have forced a pressing need to find cleaner, more environmentally friendly sources of fuel. Biomass energy is a promising alternative fuel because it offers several important advantages. It is a renewable energy form, it comes from many sources and produces biogas (CH₄ and CO₂). Furthermore, it can have a zero carbon footprint; this is due to the fact that the carbon produced is from the same …

Effects Of Initial Aquifer Conditions On Economic Benefits From Groundwater Conservation, T. Foster, N. Brozovic, A. P. Butler

Daugherty Water for Food Global Institute: Faculty Publications

Worldwide, there is growing recognition of the need to reduce agricultural groundwater use in response to rapid rates of aquifer depletion. To date, however, few studies have evaluated how benefits of conservation vary along an aquifer’s depletion pathway. To address this question, we develop an integrated modeling framework that couples an agro-economic model of farmers’ field-level irrigation decisionmaking with a borehole-scale groundwater flow model. Unique to this framework is the explicit consideration of the dynamic reductions in well yields that occur as an aquifer is depleted, and how these changes in intraseasonal groundwater supply affect farmers’ ability to manage production …

Usu Engineering Students Receive Design Award | College Of Engineering, Usu College Of Engineering

College of Engineering News

A team of USU student engineers were awarded a plaque for being the Runner Up at the WEF Student Design Competition at WEFTECH 2016.

Availability: A Metric For Nucleic Acid Strand Displacement Systems, Xiaoping Olson, Shohei Kotani, Jennifer E. Padilla, Natalya Hallstrom, Sara Goltry, Jeunghoon Lee, Bernard Yurke, William L. Hughes, Elton Graugnard

Materials Science and Engineering Faculty Publications and Presentations

DNA strand displacement systems have transformative potential in synthetic biology. While powerful examples have been reported in DNA nanotechnology, such systems are plagued by leakage, which limits network stability, sensitivity, and scalability. An approach to mitigate leakage in DNA nanotechnology, which is applicable to synthetic biology, is to introduce mismatches to complementary fuel sequences at key locations. However, this method overlooks nuances in the secondary structure of the fuel and substrate that impact the leakage reaction kinetics in strand displacement systems. In an effort to quantify the impact of secondary structure on leakage, we introduce the concepts of availability and …

Bond Between Microwave Cured Repair And Concrete Substrate, Konstantinos Grigoriadis, P. S. Mangat, Shahriar Abubakri

Henry M. Rowan College of Engineering Departmental Research

The bond strength between a concrete substrate and repair patch is critical to its durability. This paper investigates the effect of microwave curing the freshly applied repair, for 45 min at 132 Watts, on the 28 day bond strength between substrate concrete and different commercial repair materials. The repairs were applied at different ambient temperatures of 20, 10, 2 and −5 °C. Tensile split tests on repaired cube specimens were performed to determine the interfacial bond strength. The ability of microwave curing to prevent the detrimental effects of freezing at early age on the bond and compressive strength of repair …

Tissue Decellularization Methods, Christine E. Schmidt, Rebecca A. Wachs, Robert Chase Cornelison

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Provided herein are methods of producing an acellular tissue product wherein the method can include the step of inducing apoptosis and washing the tissue after induction of apoptosis with a tonic solution. Also provided herein are acellular tissue products produced by the methods provided herein and methods of administering the acellular tissue products to a subject in need thereof.

Linking Information With Knowledge For Enhanced Learning, Haroon Stephen

UNLV Best Teaching Practices Expo

Learning in classroom needs continuous engagement and triggering of curiosity. A non-stop delivery of information without context becomes “blah-blah-blah”. There is a need to create a link at every step of the way in learning.

The Las Vegas Wash: Student Real-World Site Involvement, Erica S. Tietjen

UNLV Best Teaching Practices Expo

Students from all disciplines (not just Environmental Science) can gain experience with and appreciation of their local natural resources

Integrating Fatigue Management With Safety Management Systems For Commercial Flightcrew Operations, Arnold W. Starr Jr.

International Journal of Aviation, Aeronautics, and Aerospace

Fatigue remains a significant hazard in commercial aviation and has been a major concern among all stakeholders for decades. This review of the literature explores the current prescriptive structure of the regulatory environment (Part 117) and its effect on fatigue management. To illustrate the impact of fatigue on flight operations, this article includes a brief analysis of two National Transportation Safety Board (NTSB) accident reports where fatigue was indicated as a factor. Current research in fatigue management and efforts by the Federal Aviation Administration point to the benefits of using a Safety Management Systems (SMS) methodology to manage fatigue. Using …

Reference Slides, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation of "Reference Slides" created by Professor Bob Twiggs from January 18, 2017.