scholarly journals DEVELOPMENT OF DESIGN CRITERIA FOR SEGMENTED BREAKWATERS

1986 ◽  
Vol 1 (20) ◽  
pp. 158 ◽  
Author(s):  
Joan Pope ◽  
Julie L. Dean
Keyword(s):  
United States ◽  
Erosion Control ◽  
The United States ◽  
Beach Erosion ◽  
Design Criteria

This paper will discuss experience and approaches to the use of segmented breakwaters for beach erosion control in the United States. Several prototype cases are examined and generalizations drawn concerning the resultant beach response. This experience is further evaluated in order to develop a preliminary approach for developing design criteria.

Investigation Into the Utilization of Peanut Fibers in Nonwovens

2003 ◽  
Author(s):  
Nicole Bieak ◽  
Brian R. George
Keyword(s):  
United States ◽  
Thermal Insulation ◽  
Erosion Control ◽  
The United States ◽  
Food Crops ◽  
Light Penetration ◽  
Nonwoven Fabrics ◽  
United States Today ◽  
Peanut Production

Peanuts are one of the leading food crops produced in the United States today. One of the problems of peanut production is disposal of the shells, or hulls, of the peanut, which are generally landfilled. The current research focused on obtaining fibers from the shells, characterizing them, and creating nonwoven fabrics containing these fibers, which were also characterized. The fibers obtained ranged in length from 0.6 cm to 6.3 cm, and were generally stiff. Wet laid nonwovens were produced and a variety of bonding methods such as needlepunching and latex bonding were performed. Latex bonding gave the best results, and the resulting fabrics were characterized in terms of strength, moisture, and light penetration, and thermal insulation capability. The fabrics had similar light and moisture penetration properties as some commercially available erosion control fabrics and thus may be suitable for this purpose. The fabrics also retained some heat, and may be suitable for insulation purpose.

scholarly journals THE BEACH EROSION BOARD

2010 ◽  
Vol 1 (1) ◽  
pp. 12
Author(s):  
Dabney O. Elliott
Keyword(s):  
United States ◽  
Federal Government ◽  
The United States ◽  
Coastal Engineering ◽  
The State ◽  
Beach Erosion ◽  
Corps Of Engineers ◽  
Navigation Channel ◽  
Indian River ◽  
Local Agencies

The purpose of this paper is to describe the methods by which, and the extent to which the Federal Government participates with local agencies in the control of beach erosion. The Beach Erosion Board of the Corps of Engineers is the instrumentality through which this participation is affected. However, before describing this Board, it is necessary to sketch very briefly the background of the beach erosion problem as viewed from the national standpoint. The necessity for the control of beach erosion by one means or another has no doubt been recognized from the beginning of the practice of coastal engineering in the United States. The early technical records of the Corps of Engineers contain numerous references to the mutual effects which navigation structures and the adjacent shorelines exert upon each other. As an example, chosen at random, I may mention the construction in 1874 of twelve stone groins along the shore of the State of Connecticut between Welshs Point and Indian River, and of a stone jetty at the mouth of that river in the following year, to stabilize the shoreline and to prevent the movement of sand into the navigation channel of that river.

Containment Design, Performance Criteria and Research Needs for Advanced Reactor Designs

2004 ◽  
Author(s):  
Goutam Bagchi ◽  
Syed Ali ◽  
James Costello
Keyword(s):  
United States ◽  
The United States ◽  
Structure Design ◽  
Performance Criteria ◽  
Severe Accident ◽  
Design Criteria ◽  
Research Needs ◽  
Design Code ◽  
Performance Requirements ◽  
Design Basis

This paper points out some important shifts in the basic expectations in the performance requirements for containment structures and discusses the areas where the containment structure design requirements and acceptance criteria can be integrated with ultimate test based insights. Although there has not been any new reactor construction in the United States for over thirty years, several designs of evolutionary and advanced reactors have already been certified. Performance requirements for containment structures under design basis and severe accident conditions and explicit consideration of seismic margins have been used in the design certification process. In the United States, the containment structure design code is the American Society of Mechanical Engineers, Boiler and Pressure Vessel Code, Section III, Division 1, Subsection NE-Class MC for the steel containment and Section III, Division 2 for reinforced and prestressed concrete reactor vessels and containments. This containment design code was based on the early concept of applying design basis internal pressure and associated load combinations that included the operating basis and safe shutdown earthquake ground motion. These early design criteria served the nuclear industry and the regulatory authorities in maintaining public health and safety. However, these early design criteria do not incorporate the performance criteria related to containment function in an integrated fashion. Research in large scale model testing of containment structures to failure from over pressurization and shake table testing using simulated ground motion, have produced insights related to failure modes and material behavior at failure. The results of this research provide the opportunity to integrate these observations into design and acceptance criteria. This integration process would identify “gaps” in the present knowledge and future research needs. This knowledge base is important for gleaning risk-informed insights into the design basis and severe accident behavior of containments.

scholarly journals 50-YEAR HISTORY OF THE UNITED STATES (USA) ARMY ENGINEERS COASTAL ENGINEERING RESEARCH BOARD (CERB)

2018 ◽  
pp. 70
Author(s):  
Joan Pope
Keyword(s):  
United States ◽  
The United States ◽  
Public Law ◽  
Coastal Engineering ◽  
Beach Erosion ◽  
Research And Practice ◽  
Engineering Research ◽  
History Of ◽  
Hydraulics Laboratory ◽  
Coastal Research

The U. S. Army Coastal Engineering Research Board (CERB), established on 7 November 1963 by Public Law No. 172, of the 88th USA Congress, has had a major impact on the field and profession of coastal engineering for over 50 years. The CERB replaced the Beach Erosion Board (BEB) (created in 1930) and provided oversight to the Coastal Engineering Research Center (CERC), now the Coastal and Hydraulics Laboratory. The greatest names in USA coastal engineering and science have served on the CERB and helped to define the course of USA coastal research and practice.

scholarly journals Native woody plants of the United States : their erosion-control and wildlife values /

1938 ◽  
Author(s):  
William Richard Van Dersal ◽  
Furman Lloyd Mulford ◽  
C. w. Thornthwaite ◽  
Keyword(s):  
United States ◽  
Woody Plants ◽  
Erosion Control ◽  
The United States

scholarly journals United States building code approach to variations in regional seismicity

2000 ◽  
Vol 33 (1) ◽  
pp. 48-55 ◽  
Author(s):  
Charles A. Kircher
Keyword(s):  
United States ◽  
Seismic Design ◽  
Model Building ◽  
Building Design ◽  
The United States ◽  
Building Codes ◽  
Building Code ◽  
Design Criteria ◽  
Narrow Strip ◽  
Moderate Seismicity

The United States contains regions of greatly varying seismicity ranging from a relatively narrow strip of very high seismicity along coastal California in the West to broad areas of low or moderate seismicity typical of the Central and Eastern United States. The United States currently has three major regional model building codes. While all three codes have traditionally used the concept of seismic zones to identify and distinguish between regions of different seismicity, they have not had a consistent basis for their seismic criteria. Beginning in the year 2000, the three model building codes will merge and become the new International Building Code (IBC) applicable to the whole United States. New seismic design criteria have been developed for the 2000 IBC that now define ground shaking for building design by spectral acceleration contours. This paper describes the background and basis for the new seismic design criteria of the 2000 IBC, and how these criteria address the large variation in seismic hazard across the United States.

Sensor Design for Automobile Air Bag Systems: Design Methods and Criteria

1992 ◽  
Author(s):  
Ching-Yao Chan
Keyword(s):  
United States ◽  
Systems Design ◽  
The United States ◽  
Design Methods ◽  
Design Criteria ◽  
Sensor Design ◽  
The Public ◽  
Air Bags ◽  
Air Bag

Abstract Air bags are becoming a popular option chosen by the automobile manufacturers and also by the public to be installed on new cars sold in the United States. Sensors that detect crash occurrence play a fundamental role in the effectiveness of air bag systems. What properties of a vehicle should be sensed in a crash and used to activate an air bag system? How does a concept or method of crash sensing affect the design criteria? These issues are not only technically challenging but also closely related to the success of air bag technologies in millions of cars driven by the public.

Sign in / Sign up

Export Citation Format

Share Document