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Watertown, MA, United States

Claudino-Sales V.,Federal University of Ceara | Wang P.,University of South Florida | Horwitz M.H.,University of South Florida | Horwitz M.H.,BCI Inc
Journal of Coastal Research | Year: 2010

Santa Rosa Island, situated along the northwestern Florida coast facing the Gulf of Mexico, is an 85-km-long wave-dominated low-lying barrier island with well-developed incipient and established dunes. In this paper, we examine the regional-scale effect on coastal dunes by a strong category 3 hurricane, Ivan, through comparison of pre- and poststorm airborne LIDAR (light detecting and ranging) surveys. On the basis of pre-Ivan LIDAR survey data, the elevation of the berm and back beach is typically 2.0 m above MSL (mean sea level). Incipient dunes range from 2.5 to 10 m above MSL, or 0.5 to 8.0 m above the surrounding beach. The hummocky dunes that developed over relic washover platforms are typically less than 4.0 m above MSL. The densely vegetated, established dune fields are composed of dunes less than 7.0 m high and intradune wetlands lying at less than 1.0 m above MSL. The entire island was severely affected by Ivan, which made landfall about 45 km to the west in September 2004. The landscape was substantially changed by Ivan. Over 70 of the incipient and hummocky dunes were destroyed, and a large portion of the low-lying wetlands was covered by washover. The degree of storm-induced morphology change depends not only on the intensity and duration of the storm but also on the antecedent morphological characteristics of the barrier island. Comparison of pre- and post-Ivan cross-island LIDAR profiles indicates that at most locations, more sand was eroded from the subaerial portion of the barrier island (e.g., beach and dune) than was deposited as washover terraces and lobes. This suggests a net sand loss to the offshore region. Evidence of sand moving alongshore related to the oblique orientation of the dunes was also identified. Under inundation regime, the subaerial sediment deficit could be accounted for by subaqueous sedimentation into the back-barrier bay. © 2010 Coastal Education and Research Foundation. Source

Ozer A.T.,Okan University | Bromwell L.G.,BCI Inc
Geosynthetics International | Year: 2012

When designing a roller-compacted concrete (RCC) spillway for a reservoir, seepage- induced uplift pressures need to be considered. This case study describes the design, construction and post-construction performance of a drainage system consisting of a geocomposite drain immediately beneath a stair-stepped RCC spillway at the Loxahatchee Reservoir in western Palm Beach County, Florida, USA. The installation comprised 2.8 km of RCC and a geocomposite drain to construct the fixed-weir emergency spillway. The primary stability issue for the spillway was the development of excessive pore water pressure beneath the RCC in the event of rapid drawdown of the reservoir. Transient seepage analysis predicted that installation of the geocomposite drain would eliminate excess pore pressures beneath the RCC, and dramatically increase the factor of safety against uplift (increased from 0.5 to a value of the order of 6), preventing structural instability of the spillway. Since placing the reservoir in operation, no structural instability has been observed in the spillway. Also, the absence of excess pore pressure is predicted by post-construction transient seepage analysis using reservoir operational-stage data. © 2012 Thomas Telford Ltd. Source

Ozer A.T.,Okan University | Bromwell L.G.,BCI Inc
Engineering Geology | Year: 2012

This case study describes the design, and construction of an earth dam built on recently sedimented tailings consisting of low strength, low plasticity silt/clay, and variably silty sand. The tailings were encountered within the construction limits of Cell 7 at the 4km2 Loxahatchee (L-8) Reservoir in western Palm Beach County, Florida. Fully coupled steady state and transient seepage models with slope stability analyses were performed for operational and rapid drawdown conditions, respectively, using both limit equilibrium methods (LEM) and finite element stress-based modeling (FESBM) techniques. In addition, stability calculations utilizing fully coupled stress/pore pressure analysis were performed to analyze rapid drawdown stability during drawdown. © 2012 Elsevier B.V. Source

McParland T.,BCI Inc
ICNS 2016: Securing an Integrated CNS System to Meet Future Challenges | Year: 2016

Activities have been initiated in ICAO and AEEC to further develop the Aeronautical Telecommunications Network/Internet Protocol Suite (ATN/IPS) rather than the ATN/Open System Interconnection (ATN/OSI) protocols for use by safety and regularity of flight applications. Aside from the basic approach to mobility within a given Air/Ground Access Network an approach to multi-link operation over multiple Air/Ground Access Networks is needed. A description of local mobility management using PMIPv6 for the VHF Digital Link Mode 2 (VDL-2) terrestrial access network was provided in [1]. This paper proposes the use of MIPv6 as the global mobility management protocol which provides the desired multi-link capability. © 2016 IEEE. Source


BCI Inc | Date: 2014-01-31

Bathtub enclosures; bathtub surrounds; fitted liners for baths and showers; shower bases; shower doors; shower enclosures; shower surrounds; acrylic bathtub liners, shower base liners, bathtub and shower walls, replacement bathtubs and showers; acrylic bath liners, shower liners, tub and shower walls. Installation of bathtub liners, bath and shower walls, shower bases and shower doors. Providing temporary use of non-downloadable software for allowing users to custom design a bathroom and for providing an interactive website to assist customers in designing a bathroom.

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