Maine Maritime Academy is a public post-secondary college and nautical training institution with approximately 900 students, located in Castine in Hancock County, Maine, USA. The Academy was established by the 90th Maine Legislature on March 21, 1941. Maine Maritime Academy is a public college. Costs of admission are comparable to the nearby University of Maine. Unlike federal service academies, a congressional recommendation is not required to attend this state school. Students are not obligated to go to sea or into the military after graduation, and a large portion of the graduating class chooses shore-side employment, often in maritime related fields or the power generation industry.Maine Maritime Academy is one of six maritime training colleges in the United States, and one of only two of these maritime academies which fields a Navy Reserve Officers Training Corps unit. The college is affiliated under the New England Association of Schools and Colleges. Maine Maritime Academy is the only business, residence, or organization to receive mail at the US ZIP code 04420. Wikipedia.
Finiguerra M.,University of Connecticut |
Avery D.E.,University of Connecticut |
Avery D.E.,Maine Maritime Academy |
Dam H.G.,University of Connecticut
Harmful Algae | Year: 2014
Local adaptation of the copepod Acartia hudsonica to toxic Alexandrium spp. is associated with degree of historical co-exposure. Recently, a novel mutation in the sodium channel in A. hudsonica was hypothesized to be the mechanism of adaptation to toxic Alexandrium; all copepods express both types of sodium channels. We tested the hypothesis that mutant sodium channel expression in A. hudsonica individuals corresponded to historical co-exposure to A. fundyense. Female A. hudsonica were sampled from historically exposed (Maine) and naïve (Connecticut and New Jersey) populations to A. fundyense, throughout the 2011 season of growth of A. hudsonica. There were no consistent differences in wild-type: mutant isoform ratios nor in the relative abundance of individuals that predominately express one type of isoform, either through time within a population or among populations or over time within each location. We also tested the hypothesis that expression of the mutant sodium channel isoform in A. hudsonica should increase during the progression of a toxic Alexandrium bloom. Sodium channel expression was compared before, during, and after the 2011 toxic Alexandrium spp. bloom in Northport Harbor, NY. Moreover, the relative expression of the mutant isoform increased slightly after the peak of the toxic Alexandrium spp. bloom; however, there was no simultaneous increase in individuals that predominately express mutant channel isoforms. Overall, there was little evidence in support of our hypotheses. Other mechanisms must be responsible for the observed geographic differences in adaptation of copepods to toxic Alexandrium. © 2014 Elsevier B.V.
Koo B.J.,Technip |
Goupee A.J.,University of Maine, United States |
Kimball R.W.,Maine Maritime Academy |
Journal of Offshore Mechanics and Arctic Engineering | Year: 2014
Wind energy is a promising alternate energy resource. However, the on-land wind farms are limited by space, noise, and visual pollution and, therefore, many countries build wind farms near the shore. Until now, most offshore wind farms have been built in relatively shallow water (less than 30 m) with fixed tower type wind turbines. Recently, several countries have planned to move wind farms to deep water offshore locations to find stronger and steadier wind fields as compared to near shore locations. For the wind farms in deeper water, floating platforms have been proposed to support the wind turbine. The model tests described in this paper were performed at MARIN (maritime research institute netherlands) with a model setup corresponding to a 1:50 Froude scaling. The wind turbine was a scaled model of the national renewable energy lab (NREL) 5MW horizontal axis reference wind turbine supported by three different generic floating platforms: a spar, a semisubmersible, and a tension-leg platform (TLP). The wave environment used in the tests is representative of the offshore in the state of Maine. In order to capture coupling between the floating platform and the wind turbine, the 1st bending mode of the turbine tower was also modeled. The main purpose of the model tests was to generate data on coupled motions and loads between the three floating platforms and the same wind turbine for the operational, design, and survival seas states. The data are to be used for the calibration and improvement of the existing design analysis and performance numerical codes. An additional objective of the model tests was to establish the advantages and disadvantages among the three floating platform concepts on the basis of the test data. The paper gives details of the scaled model wind turbine and floating platforms, the setup configurations, and the instrumentation to measure motions, accelerations, and loads along with the wind turbine rpm, torque, and thrust for the three floating wind turbines. The data and data analysis results are discussed in the work of Goupee et al. (2012, "Experimental Comparison of Three Floating Wind Turbine Concepts," OMAE 2012-83645). © 2014 by ASME.
Friedman C.L.,Massachusetts Institute of Technology |
Friedman C.L.,Maine Maritime Academy |
Selin N.E.,Massachusetts Institute of Technology
Atmospheric Chemistry and Physics | Year: 2016
We present a spatially and temporally resolved global atmospheric polychlorinated biphenyl (PCB) model, driven by meteorological data, that is skilled at simulating mean atmospheric PCB concentrations and seasonal cycles in the Northern Hemisphere midlatitudes and mean Arctic concentrations. However, the model does not capture the observed Arctic summer maximum in atmospheric PCBs. We use the model to estimate global budgets for seven PCB congeners, and we demonstrate that congeners that deposit more readily show lower potential for long-range transport, consistent with a recently described "differential removal hypothesis" regarding the hemispheric transport of PCBs. Using sensitivity simulations to assess processes within, outside, or transport to the Arctic, we examine the influence of climate-and emissions-driven processes on Arctic concentrations and their effect on improving the simulated Arctic seasonal cycle. We find evidence that processes occurring outside the Arctic have a greater influence on Arctic atmospheric PCB levels than processes that occur within the Arctic. Our simulations suggest that re-emissions from sea ice melting or from the Arctic Ocean during summer would have to be unrealistically high in order to capture observed temporal trends of PCBs in the Arctic atmosphere. We conclude that midlatitude processes are likely to have a greater effect on the Arctic under global change scenarios than re-emissions within the Arctic. © 2016 Author(s).
Wlodkowski P.A.,Maine Maritime Academy
International Journal for the History of Engineering and Technology | Year: 2015
This paper reviews the career of the late nineteenth- and early twentiethcentury Russian engineer Aleksej Nikolaevich Krylov (1863-1945). He made prodigious contributions to the fields of marine engineering, naval architecture, strength of materials, physics, analogue computers, ballistics, applied mathematics, astronomy, and engineering education. Surprisingly unknown in the West today, Krylov had achieved international fame in 1899 when he became the first foreigner to receive a gold medal from the Royal Institution of Naval Architects in London. After the years of upheaval following the Russian Revolution of 1917 and the subsequent civil war, Krylov was instrumental in re-establishing scientific contacts with the West and defining Soviet technological policy. Later in life, his erudition extended into the history of science and technology. This paper focuses on his first groundbreaking work: the development of methods to correct compass deviation and the corresponding design of his new dromoscope. © The Newcomen Society for the Study of the History of Engineering & Technology 2015.
Simmons J.J.H.,Maine Maritime Academy
Journal of Physics A: Mathematical and Theoretical | Year: 2013
We consider the sub-sector of the c = 0 logarithmic conformal field theory (LCFT) generated by the boundary condition changing (bcc) operator in two dimensional critical percolation. This operator is the zero weight Kac operator φ1, 2 φ, identified with the growing hull of the SLE 6 process. We identify percolation configurations with the significant operators in the theory. We consider operators from the first four bcc operator fusions: the identity and φ; the stress-tensor and its logarithmic partner; ∂φ and its logarithmic partner; and the pre-logarithmic operator φ1, 3. We construct several intervals in the percolation model, each associated to one of the LCFT operators we consider, allowing us to calculate crossing probabilities and expectation values of crossing cluster numbers. We review the CG, which we use as a method of calculating these quantities when the number of bcc operator makes a direct solution to the system of differential equations intractable. Finally we discuss the case of the six-point correlation function, which applies to crossing probabilities between the sides of a conformal hexagon. Specifically we introduce an integral result that allows one to identify the probability that a single percolation cluster touches three alternating sides a hexagon with free boundaries. We give results of the numerical integration for the case of a regular hexagon. © 2013 IOP Publishing Ltd.
Di Bella F.A.,NREC |
Lorenz P.,Maine Maritime Academy
2014 Oceans - St. John's, OCEANS 2014 | Year: 2015
An oscillating water-air column (OWC) is one of the most technically viable options for converting wave energy into useful electric power. The OWC system uses the wave energy to 'push or pull' air through an air turbine, as illustrated simply in Fig. 1. The turbine is typically a bidirectional turbine, such as a Wells turbine, or an advanced Dennis-Auld turbine. The energy conversion from the water column to pneumatic power in an OWC system is affected by sinusoidal transients of volume flow rate and OWC chamber pressure through the turbine. The recovery of wave energy is also affected by the buoyancy of the floating OWC and its relative motion between the turbine and the wave front. A new math model of an OWC system has been developed by Concepts NREC (CN) that is based on Lagrangian Dynamics and can provide more insight into what parameters most affect the recovery of energy from water waves. The sketch shown in Fig. 2 depicts the model of an OWC with distances in relation to the sea-bed floor taken to be the inertial reference. The variable X1 represents the massless distance of the water wave front from the inertial reference which imparts a non-conservative force Ft into the OWC chamber, thus exciting the entrapped air. The variable X2 represents the distance of the OWC mass from the inertial reference and includes a non-conservative force, Fb, that is associated with the buoyancy of the OWC mass caused by the motion of the OWC as it responds to the non-conservative force, Ft. The variable X3 represents the distance of the virtual joint connecting the spring constant and the damping coef. The power extraction by the turbine and the air cavity within the OWC are thus modeled using a damping coef., C [Lbf/(ft/s)], and a spring constant, Ks [Lbf/ft] derived as a function of the OWC geometry. The primary objective for the analysis is to determine the amount of work extracted from the OWC system via the damping system, with damping constant C as a function of the OWC size and the wave period and amplitude, and to discern how the recovery of the energy from the wave may be improved upon by designing the OWC features when the incident wave climate changes. A secondary objective of the analysis was to compare the results from the Lagrangian Analysis with two other thermo-fluids models of an OWC system that were previously derived by Concepts NREC for a fixed OWC system. Ultimately, a solution derived from Lagrangian Dynamics would provide a greater insight into improving the capture of wave energy from a climate of waves with different frequency and amplitudes. This paper will provide the details of the solution of the Lagrangian Dynamics Solution and how they may be applied to an OWC design. The paper also provides a summary review of earlier computer models of an OWC that have been prepared by Concepts NREC. © 2014 IEEE.
Epps B.P.,Dartmouth College |
Kimball R.W.,Maine Maritime Academy
Journal of Ship Research | Year: 2013
A unified lifting line method for the design and analysis of axial flow propellers and turbines is presented. The method incorporates significant improvements to the classical lifting line methods for propeller design to extend the method to the design of turbines. In addition, lifting line analysis methods are developed to extend the usefulness of the lifting line model to allow generation of performance curves for off-design analysis. The result is a fast computational methodology for the design and analysis of propellers or turbines that can be used in preliminary design and parametric studies. Design and analysis validation cases are presented and compared with experimental data.
Flores S.M.,University of Helsinki |
Ziff R.M.,University of Michigan |
Simmons J.J.H.,Maine Maritime Academy
Journal of Physics A: Mathematical and Theoretical | Year: 2015
In a recent article (Simmons 2013 J. Phys. A: Math. Theor. 46 494015), the last author of this article used c = 0 logarithmic conformal field theory to predict crossing probability formulas for percolation clusters inside a hexagon with free boundary conditions. In the present article, we verify these predictions with high-precision computer simulations for equiangular hexagons with side lengths alternating from short to long. Our simulations generate percolation-cluster perimeters with hull walks on a triangular lattice inside a hexagon. Each sample comprises two hull walks, and the order in which these walks strike the bottom and upper left/right sides of the hexagon determines the crossing configuration of the percolation sample. We compare our numerical results with the predicted crossing probabilities, finding excellent agreement. © 2015 IOP Publishing Ltd.
Cote M.A.,Maine Maritime Academy
ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) | Year: 2010
Industry-centered education has been an integral part of the educational program at Maine Maritime Academy (MMA) since the founding of the college in 1941. This has included extensive use of laboratories and cooperative education as part of all MMA academic programs. Employers, graduates, and potential students describe MMA's "hands-on" focus, reflected in the laboratory and cooperative education experiences, to be one of the main advantages of an MMA education, including the Power Engineering Technology (PET) program. In 1993, the MMA Engineering Department decided to build on this strength for the PET program by adding a personal computer-based, power plant control room simulator laboratory. The simulators were integrated into the PET Capstone experience, a two-course, nine credit hour sequence, that included both individual and team projects. The simulators were used to provide additional realistic, "hands-on" training as the students completed their degree. Over the course of the past fifteen years, while the simulators have continued to be a valued tool for the PET Program, the simulators were reaching the end point of their viable use due to hardware obsolescence. Since the simulator software was hardware specific, it had become impossible to procure replacement hardware for the simulators. In 2008, it was decided to replace the simulators and new simulator hardware and software have been procured and will be integrated into the PET Program beginning in the fall 2010 semester. This paper will describe the process used to determine the scope of the replacement process, the parameters for the new simulation systems, the procedure for determining the systems selected, and the process of integrating these new resources, including the assessment methods using the simulators, into the PET Program. © 2013 ASME.
Cleveland A.,Maine Maritime Academy |
Verde E.A.,Maine Maritime Academy |
Lee R.W.,Washington State University
Marine Biology | Year: 2011
The relationship between anemones and anemonefishes is an oft-cited and endearing example of a mutualistic symbiosis. Current research on mutualistic symbioses suggests these relationships are more commonplace and have greater importance at the ecosystem level on nutrient dynamics and evolutionary processes than previously thought. Using stable isotopes 15N and 13C, both field and laboratory experiments were designed to investigate whether nutrient transfer from two species of resident anemonefishes (Amphiprion perideraion and A. clarkii) to host anemones (Heteractis crispa) occurs. Mass spectroscopy indicated that both 15N and 13C were significantly elevated in the tissues of anemonefishes and in both host anemone and zooxanthellae fractions. These experiments provide the first direct empirical evidence of nitrogen and carbon transfer from resident anemonefishes to host anemones and endosymbiotic zooxanthellae. Such transfer of elements within this intriguing tripartite association underscores the central role that nutrient dynamics contributes to the evolutionary processes of these marine symbioses. © 2010 Springer-Verlag.