Digital Commons Network^™

Experimental Assessment Of Suspended Sediment Concentration Changed By Solitary Wave, Jae-Nam Cho, Chang-Geun Song, Kyu-Nam Hwang, Seung-Oh Lee

Journal of Marine Science and Technology–Taiwan

A large scale solitary wave causes a lot of sediment transportation and coastal beach erosion, for example tsunami is the one type of solitary waves. During passing such solitary wave over coastal region, higher energy on sediment transportation near bottom would bring to massive geomorphological changes and even worse damages in life and economics. The major objective of this study is to analyze the incipient motion of sediment suspended from bottom by a solitary wave through hydraulic experiments and numerical simulations. First, to estimate the process of sediment transport the experimental study was carried out in the prismatic rectangular channel …

The Nonlinear Dynamics And Anti-Sway Tracking Control For Offshore Container Crane On A Mobile Harbor, You-Gang Sun, Hai-Yan Qiang, Junqi Xu, Da-Shan Dong

Journal of Marine Science and Technology–Taiwan

The offshore container crane (OCC), as a novel maritime container transfer system, can handle container from a large container-ship anchored in open sea to address the congestion and limited water-depth of port. However, for the wave- and wind-induced movements of the ship, the crane's control system should be redesigned to ensure the load transfer on the sea. In this paper, we derive the nonlinear dynamic equations of OCC system subjected to the ship motions based on dynamic analysis. Then a double-layer sliding manifold is constructed to realize the position tracking and sway control simultaneously, irrespective of ship motions and parameters …

Numerical Computation Of The Transient Salinity Distribution In A Macro-Tidal Estuary, Seung Oh Lee, Chang Geun Song

Journal of Marine Science and Technology–Taiwan

In this study, the flow reversal and salinity distribution associated with tidal effects were investigated at a macro-tidal estuary located in tidal range of the Yellow Sea in South Korea. A 2-D hydrodynamic model (RMA-2) and a 2D advectiondispersion model (RAM4) were employed to simulate flow behavior and salinity distribution, respectively. The results showed that reverse flow occurred five times over 3-day period and the maximum reverse flow extended over 32.9 km upstream. Salinity distribution was obtained by estimating the salinity input with analytical solution of advection-dispersion equation. The total length of the saline wedge calculated from numerical simulation was …

Simulation And Motion Analysis Of Deepwater Manifold Lifting, Zhiwei Chen, Tingdi Zhao, Jian Jiao, Dongfeng Mao

Journal of Marine Science and Technology–Taiwan

The development and utilization of oil and gas resources has expanded to deep water. The installation of a subsea manifold is crucial for developing offshore oil-gas fields. In this study, we used the lifting installation method (LIM) to install a subsea manifold. First, the appropriate environmental parameters were selected through the analysis of environmental loads at the Liwan 3-1 Gasfield in the South China Sea. The wind and wave spectra were selected using noise power density and Joint North Sea Wave Project spectra, respectively. The entire lifting and installation system that responds to environmental loads comprised a vessel, cable, and …

Energy Efficient Trajectory Design For The Underwater Vehicle With Bounded Inputs Using The Global Optimal Sliding-Mode Control, Mai The Vu, Hyeung-Sik Choi, Jin-Il Kang, Dae-Hyung Ji, Hyun Joong

Journal of Marine Science and Technology–Taiwan

In this paper, we propose a novel global sliding mode controller (SMC) for an uncertain linear time-varying second order system. The proposed controller was implemented on the underwater vehicle (UV) with uncertainty of bounded parameters and disturbances within limited control input. By applying the proposed controller to the second-order UV system, the arrival time at the reference position and the maximum allowable acceleration are expressed in a closed-form equation if ranges of parametric uncertainties and reference inputs are specified. The closed-form equation can be utilized in designing the capacity of vehicle systems with the condition of the minimum arrival time …

Real-Time Method For Calculating Retardation Functions, Li-Hao Yuan, Yue-Sheng Ma, Ying-Fei Zan, Zhao-Hui Wu

Journal of Marine Science and Technology–Taiwan

To meet the demand for real-time calculation of time-domain motion equations, a state-space model was established to replace the convolution integral method to improve computational efficiency. On the basis of the HYSY201 vessel, the impulse response curve fitting method and the realization theory method based on the time-domain identification theory were compared to establish the state-space model. The results of roll decay simulation conducted using the state-space model and the convolution integral method were verified against decay test results. The simulation results for retardation function, radiation forces, and motion time histories calculated using the state-space model and the convolution integral …

Survey Of Trajectory Tracking Control Of Autonomous Underwater Vehicles, Wen-Yang Gan, Da-Qi Zhu, Wei-Li Xu, Bing Sun

Journal of Marine Science and Technology–Taiwan

Autonomous underwater vehicles (AUVs) are powerful instruments that enable the exploration of the ocean. In recent years, AUVs have been developed considerably. Trajectory tracking control, which has been a major research focus for many decades due to its variety of applications, is one of the key advancements in the AUV technology. This paper presents six trajectory tracking control methods: PID (proportion integration differentiation) control, fuzzy control, adaptive control, sliding mode control, backstepping control, and neural network control. A few novel methods for trajectory tracking control are also introduced. First, the concept of trajectory tracking control for an AUV and the …

Modeling Of Dynamic Behavior For Port Structures Using The Performance-Based Seismic Design, Cheng-Yu Ku, Jing-Jong Jang, Jui-Ying Lai, Ming-Jr Hsieh

Journal of Marine Science and Technology–Taiwan

The paper presents a pioneer study on numerical modeling of dynamic behavior for port structures using the performancebased seismic design in Taiwan. Since Taiwan is located in earthquake prone area, there is significant interest in improving prediction of the behavior of port structures subjected to seismic loading. The investigation of port structures using three different analysis methods including the simplified analysis, the simplified dynamic analysis, and the dynamic analysis were adopted for evaluating the performance of the cellular quay wall and sheet pile quay wall. In addition, the effective stress analysis with the consideration of the pore pressure generation and …

Cost Of Salvage?€“ A Comparative Form Approach, Chung-Sheng Chiu, Chung-Ping Liu, Ki-Yin Chang, Wen-Jui Tseng, Yung-Wei Chen

Journal of Marine Science and Technology–Taiwan

The most important principle of salvage is the "No Cure-No Pay" basis, if there is no recovery, there is no payment, whatever the expense of the operation. However, this principle has changed in recent years to reflect the public interest in prevention of damage to the environment (Mudric, 2010). The salvor can now contract in such a way that he is shielded from loss when responding to high risk or low value casualties (so called as "No Cure-Some pay"). Salvage is a high-profit business and high-risk as well in the world. The case of the Costa Concordia - by no …

A Numerical Model For Pipeline Abandonment In Deep Water, Duanfeng Han, Kuo Huang, Yingfei Zan, Zhaohui Wu

Journal of Marine Science and Technology–Taiwan

In offshore oil and gas engineering, pipeline abandonment is unavoidable and its mechanical analysis is necessary and important. For this problem, a numerical model is developed in this study to evaluate pipeline abandonment for the J-laying method. The whole system considered in this model is divided into two parts: the A&R cable and the pipeline in the water. A catenary model was proposed for the former, and the latter is solved by a numerical iterative method. In addition to the boundary conditions at the two end points, a special set of boundary conditions is required at the junction that connects …

Experimental Study Of Dynamic Stability Of Underwater Vehicle-Manipulator System Using Zero Moment Point, Jin-Il Kang, Hyeung-Sik Choi, Mai The Vu, Nguyen Ngoc Duc, Dae-Hyeong Ji, Joon-Young Kim

Journal of Marine Science and Technology–Taiwan

For manipulative underwater operations, an underwater vehiclemanipulator system (UVMS) has more degrees of freedom than those required to conduct a given mission. To follow the desired end-effector position and velocity accurately, UVMS should be able to generate trajectories of manipulators and the underwater vehicle can maintain dynamic stability of the entire system. In this paper, redundancy resolution is performed to find a solution satisfying the given task among many joint-space solutions. Also, to improve the dynamic stability of the UVMS, zero moment point (ZMP) is adopted such that it requires some constraints. For application of UVMS, a joint limitation is …

A Time-Domain Numerical Tool For A Wave Energy Attenuator With The Sph Method, Da-Wei Chen, Shuichi Nagata, Shiaw-Yih Tzang, Yasutaka Imai, Chih-Min Hsieh, Jiahn-Horng Chen

Journal of Marine Science and Technology–Taiwan

The wave energy attenuator is a floating device which operates perpendicular to the wave fronts and captures wave energy from the relative motions of two hinged floaters as waves passing by them. For establishing the time-domain numerical tools to evaluate the performance of a wave energy attenuator, a Smoothed Particle Hydrodynamic (SPH) model with mesh-free method was adopted to simulate the hydrodynamic behaviors of each floating object. Three different wave heights of 6 cm, 7 cm, and 10.4 cm of the same period of 1.22 s were commonly derived from typical potential oceanic zones offshore Taiwan and Japan. Comparisons of …

Dynamic Response Analysis Of Micro-Grid With Ocean Thermal Energy Conversion, Chia-Yu Hsu, Ming-Wang Chen, Pei-Hwa Huang

Journal of Marine Science and Technology–Taiwan

The main purpose of this paper is to analyze the dynamic responses of micro-grid with Ocean Thermal Energy Conversion (OTEC) system. The power sources of the studied micro-grid system include an OTEC generator and a wind generator. Three different types of OTEC generation systems, i.e., open-cycle, closed-cycle, and hybrid-cycle, are considered, under the conditions with the same temperature of sea water and output of generator. When the system operates in an islanding or gridconnected mode, the responses subject to load variation are quite different. As the system operates in the grid-connected mode, the voltage and frequency are less affected by …

Cyclic Shear Behavior Characteristics Of Marine Silty Sand, Su Won Son, Min Jae Ko, Jin Man Kim

Journal of Marine Science and Technology–Taiwan

Owing to the high demand for energy supply, the use of offshore wind turbines as a renewable and environment-friendly energy source has been remarkably increased. After installation in the ocean, the offshore structure foundations and soil that support them are subjected to cyclic loading from wind and waves. In this study, laboratory experiments were conducted to evaluate the shear behavior characteristics of the marine soil subjected to cyclic loading. Utilizing a cyclic direct simple shear (CDSS) test apparatus, the undrained shear failure behavior of marine silty sand was investigated. The results show that the cyclic behavior and permanent shear strain …

Research On Integration And Sharing Solutions For Big Structured Data For The Marine Environment, Wei Wang, Wenfang Cheng, Jing Chen, Ya-Nan Yu, Jianxun Zhang

Journal of Marine Science and Technology–Taiwan

The data-intensive science, a new paradigm in scientific discovery, demands an urgent solution to integrate and share big marine environment data. Through the modeling of marine environmental features (such as Temperature, Salinity, Density et al.), a novel solution is presented in this paper. This solution employs Hadoop and Hbase, based on the Bigtable algorithm first proposed by Google Inc. By using hierarchical technology, scalability of the data integration framework is realized. Additionally, an efficient execution of various queries is realized by using the customized auxiliary index algorithm. In the experimental cluster environment constructed from four ordinary personal computers, experiments involving …

A Simplified Analytical Method For Estimating Flow-Induced Vibration Responses Of Hydraulic Structures Caused By Flow Fluctuation, Ya-Chao Wu, Lu Lu, Qin-Man Fan, Yun Dong, Chun-Yuan Zuo

Journal of Marine Science and Technology–Taiwan

In many hydraulic engineering investigations of flow-induced vibration responses, a model test is necessary but yet expensive. In this article, an equilibrium equation between the operation of fluctuating pressure and the work done by damping is established to provide a simplified analytical method for estimating the flow-induced vibration responses of hydraulic structures caused by water flow fluctuations. This approach is based on the Westergaard solution. The flow-induced vibration of water flowing around a dividing wall, the flood discharge vibration of the Liuxihe arch dam, and the flow-induced vibration of the Ertan hyperbolic arch dam are presented to explain the detailed …

December 2017, Randy Curry, Cindy Brooks

RURAL ROCKS

Rural Rocks, the Rural Health Network newsletter by the SWOSU College of Pharmacy

Effects Of Crude Oil On Tumor Suppressor P53 Polymorphisms In Laboratory-Exposed Atlantic Killifish, Fundulus Heteroclitus, Allison Margaret Nadler

Seton Hall University Dissertations and Theses (ETDs)

Polycyclic aromatic hydrocarbons (PAHs), constituents of crude oil, are implicated as a potent source of adverse toxicological effects on living organisms. To model the effects of PAHs in response to environmental oil spill disasters a species of killifish (Fundulus heteroclitus) was captured and exposed to crude oil in a laboratory-controlled setting. Over a period of 7 days, fish were dosed with crude oil by gavage, culled, and organs were harvested for analysis. Excitation-emission matrix spectroscopy (EEMS) of gall bladder tissue homogenates was used to verify exposure. Effects of PAHs on the p53 gene were evaluated as an indicator …

Residential Life Curriculum: Wyoming Seminary, Allie Maxwell

Capstone Collection

This course linked capstone will focus on creating a residential life curriculum that is student centered, increases cultural competencies, and strengthens the community of the Wyoming Seminary Upper School. Many boarding schools have accepted international students into their schools to respond to a growing revenue need while simultaneously adding to a school’s diversity. The shift in student demographics has created a secondary level international education sector without many people specializing in this arena. Additionally, there has been a push to increase residential life resources in schools to help increase student support. With the drive for additional support and a growing …

Anti-Japanese Sentiment Among Graduates Of South Korean Public Schools, Jamal Barbari

Capstone Collection

This capstone paper aims to explore how South Koreans, who have graduated public high school within the past seven years (from 2010 to 2017) view Japan and Japanese people, and what (if at all) information concerning Japan and Japanese people was established and received during their presence in the public school system. Through a brief analysis into the history and intricate relationship between Korea and Japan, introduction into hidden curriculum and its significance in this context, as well as ten personal interviews with South Korean graduates who fit the criteria for this research, this capstone paper offers a distinctive insight …

Um Researchers Working On Acoustic Detection For Undersea Oil Leaks, Shea Stewart

University of Mississippi News

Team gets $591,000 grant for work to make crude production safer for the environment

Cardozo Law News Brief: December 15, 2017, Benjamin N. Cardozo School Of Law

Cardozo Law News Brief 2017

Featured Faculty:

• Alexander A. Reinert

Campus News:

• Cardozo Law and Columbia Law to Host Colloquium on Religious Conflict

Events:

• Hanukkah Celebration for Students

One-Step Synthesis And Characterization Of Biodegradable ‘Click-Able’ Polyester Polymer For Biomedical Applications, Wadha Alqahtani

Electronic Theses & Dissertations

An Abstract of the Thesis by

Wadha Alqahtani

In this study, we have synthesized linear polyester polymers from bio-based small molecules including sorbitol, glutaric acid and others. A propargylic acid derivative was used to make the resulting polymer “click”able. Melt polymerization technique was used for this polymerization reaction using a novel lipase enzyme catalyst, NOVO 435. This reaction was conducted between 90- 95 ^oC for 72 hours. The polymer samples were collected in each 24 h for detailed characterizations and polymerization reaction monitoring. The resulting polymer was purified and characterized using various spectroscopic methods such as NMR, GPC, FTIR, …

Effect Of Metal Ion Substitution On Electrochemical Properties Of Cobalt Oxide For Energy Applications, Dalal Alqahtani

Electronic Theses & Dissertations

Metal oxides are being used for various applications, such as batteries, supercapacitors, and catalysts. This research is mainly to produce high-performance energy storage devices capable of working at high temperatures and causing no pollution in the environment. To this end, the effect of metal ion substitution on the electrochemical properties of Co₃O₄ for energy applications was studied. Different metal oxides, such as FeCo₂O₄, MnCo₂O₄, Co₃O₄, NiCo₂O₄, CuCo₂O_4, and ZnCo₂O₄, were synthesized using a hydrothermal …

Synthesis And Electrical Properties Of Copolymers Containing 3-Phenyl[5]Ferrocenophane-1,5-Dimethylene And Vinylimidazole, Muteb H. Alshammari

Electronic Theses & Dissertations

Ferrocene is a well-known organometallic compound and its structure consists of an iron atom sandwiched between two cyclopentadienyl rings. Ferrocene has unique properties such as redox chemistry, high electron density, thermal stability and aromaticity. In addition, the ferrocene can be incorporated into polymers either into the backbone or on the side chains. Ferrocene incorporated polymers have received considerable attention in the areas of electro-catalysis, electrode coating, and battery applications. Therefore, the main purpose of this study is to characterize the electrochemical behavior of copolymers of 3-phenyl[5]ferrocenophane-1,5-dimethylene with vinyl imidazole in aqueous solutions with various electrolytes: sodium perchlorate, zinc perchlorate, cadmium …

Practical English For Chinese Newcomers: A Handbook For Teachers, Li Li

Master's Projects and Capstones

When new Chinese immigrants first arrive in the United States, they face challenges related to both language barriers and acculturative stress. Language barriers and acculturative stress mutually reinforce each other. Furthermore, they significantly inconvenience new Chinese immigrants in terms of living, working and studying. Incorporating cultural information into English as a second language (ESL) teaching is thus important from a sociocultural and intercultural perspective. Therefore, the underlying purposes of this project is to enhance English communicative competence and American cultural adaptation among new Chinese immigrants by immersing them in authentic, situational, and practical communication in the United States. The project …

Assessment Of Falls On A Medical-Telemetry Unit, Andie Reed

Master's Projects and Capstones

The purpose of this quality improvement project aimed at reducing falls on a medical-telemetry unit in a large metropolitan Magnet hospital. It was important for the MSN/CNL students to focus on falls because it is not just a concern for this institution, it is a national dilemma that needs to be addressed. Due to the complexities and intricate details of the IRB process, the MSN/CNL students were unable to collect data or further advance their project into the microsystem. Instead, information was attained from the University of San Francisco database to allow the MSN/CNL students to continue with the steps …

Synthesis And Characterization Of Enzyme Catalyzed Biodegradable “Click-Ene” Polymers For Targeted Cancer Therapy, Elaf Alattas

Electronic Theses & Dissertations

In this study, we report various biodegradable polymers with tunable physical properties and their possible drug delivery applications. These polymers were designed in such a way that bio-based starting materials (for example, sorbitol, hexanediol, glutaric acid) were used in order to obtain double-bond functionalized biopolymers in one-pot, and the polymerization reaction was catalyzed using an enzyme catalyst, Novozyme 435. In addition, a novel “Click-ene” chemistry was used to functionalize the resulting polymers in order to target specific cancer cells. The resulting polymers were purified using solvent precipitation method and characterized using spectroscopic techniques such as NMR, FT-IR, GPC, DSC and …

The March Of The Union Armies: James Henry Lane, The Union, And The Development Of Total War On The Kansas-Missouri Border, Alex Lahasky

Electronic Theses & Dissertations

James Henry Lane was a giant of Kansas politics during the mid-nineteenth century. His leadership during the territorial crisis of 1855—commonly known as the “Bleeding Kansas” era—contributed mightily to Kansas’s entry as a free state in 1861. During the early stages of the ensuing Civil War, Lane’s political and military presence on the plains was ubiquitous; he served simultaneously as a United States Senator and a brigadier general of the Union Army. Lane’s activities during the first year of the war provide the focal point of the present study.

With Kansas under threat from secessionist elements in neighboring Missouri, Lane …

Structured Illumination Diffuse Optical Tomography For Mouse Brain Imaging, Matthew Reisman

Arts & Sciences Graduate Student Theses and Dissertations

As advances in functional magnetic resonance imaging (fMRI) have transformed the study of human brain function, they have also widened the divide between standard research techniques used in humans and those used in mice, where high quality images are difficult to obtain using fMRI given the small volume of the mouse brain. Optical imaging techniques have been developed to study mouse brain networks, which are highly valuable given the ability to study brain disease treatments or development in a controlled environment. A planar imaging technique known as optical intrinsic signal (OIS) imaging has been a powerful tool for capturing functional …