Los Angeles and Long Beach Harbors Model Enhancement Program: Tidal Circulation Prototype Data Collection Effort. Volume 2. Appendixes D through I

1989 ◽  
Author(s):  
David D. McGehee ◽  
James P. McKinney ◽  
Michael S. Dickey
Keyword(s):  
Los Angeles ◽  
Data Collection ◽  
Long Beach ◽  
Tidal Circulation ◽  
Data Collection Effort

scholarly journals SHIP MOTION STUDY FOR THE 2010 AND 2020 PLAN IN THE SAN PEDRO BAY, CALIFORNIA

1986 ◽  
Vol 1 (20) ◽  
pp. 204
Author(s):  
A.F. Yuen ◽  
M.G. Burke ◽  
T.C. Leung
Keyword(s):  
Water Quality ◽  
Los Angeles ◽  
Ship Motion ◽  
Wave Forces ◽  
Master Plan ◽  
Long Beach ◽  
Tidal Circulation ◽  
San Pedro ◽  
Port Of Los Angeles ◽  
San Pedro Bay

The Port of Long Beach, in cooperation with the Port of Los Angeles and the Corps of Engineers, has been working on the development of a Master Plan for the San Pedro Bay area. This Master Plan, nicknamed the "2020 Plan", is intended to project the Port's land and channel requirements through the year 2020. Any landfill expansion program would be implemented in phases throughout the life of the Master Plan. The initial phases of such a plan would greatly limit the ability of the Port to revise the future configuration of landfill phases, making it important for the Port to determine a final landfill configuration before implementing the early phases. In developing the 2020 Plan, the Port projected a need for approximately 2,600 acres of additional land. In attempting to turn this 2,600 acre figure into a landfill scheme, the controlling agencies had to take a number of factors into consideration, including (1) water quality and tidal circulation; (2) potential ship motion problems; (3) additional berths required for future development; (4) land and waterside transportation corridors required; (5) availability of dredge material for creating the land; (6) available areas for creating landfills; (7) efficiency of land usage in various configurations; (8) types of ships anticipated to use the new landfills; (9) types of terminals anticipated to be located on the new landfills. The Port of Long Beach developed two basic schemes which addressed the requirements listed above. In either case, the landfill configuration for the Port of Los Angeles remained the same. The first scheme (called the island scheme, Figure 1) had the advantage of more closely matching the proposed Port of Los Angeles development. Water quality and tidal circulation would be improved with this scheme. The second scheme (called the horseshoe scheme, Figure 2) created a channel on the Long Beach side which did not match the orientation of the channel on the Los Angeles side. This channel was better protected from wave forces than the island scheme, where ships would have to be berthed along the exposed southerly boundary.

Using digital data collection tools to improve overall cost-efficiency and provide timely analysis for decision making during invasive species eradication campaigns

2014 ◽  
Vol 41 (6) ◽  
pp. 499 ◽  
Author(s):  
David J. Will ◽  
Karl J. Campbell ◽  
Nick D. Holmes
Keyword(s):  
Decision Making ◽  
Data Collection ◽  
Cost Efficiency ◽  
Relational Databases ◽  
Cost Effective ◽  
Digital Data ◽  
Capital Costs ◽  
Project Costs ◽  
Time Required ◽  
Data Collection Effort

Context Worldwide, invasive vertebrate eradication campaigns are increasing in scale and complexity, requiring improved decision making tools to achieve and validate success. For managers of these campaigns, gaining access to timely summaries of field data can increase cost-efficiency and the likelihood of success, particularly for successive control-event style eradications. Conventional data collection techniques can be time intensive and burdensome to process. Recent advances in digital tools can reduce the time required to collect and process field information. Through timely analysis, efficiently collected data can inform decision making for managers both tactically, such as where to prioritise search effort, and strategically, such as when to transition from the eradication phase to confirmation monitoring. Aims We highlighted the advantages of using digital data collection tools, particularly the potential for reduced project costs through a decrease in effort and the ability to increase eradication efficiency by enabling explicit data-informed decision making. Methods We designed and utilised digital data collection tools, relational databases and a suite of analyses during two different eradication campaigns to inform management decisions: a feral cat eradication utilising trapping, and a rodent eradication using bait stations. Key results By using digital data collection during a 2-year long cat eradication, we experienced an 89% reduction in data collection effort and an estimated USD42 845 reduction in total costs compared with conventional paper methods. During a 2-month rodent bait station eradication, we experienced an 84% reduction in data collection effort and an estimated USD4525 increase in total costs. Conclusions Despite high initial capital costs, digital data collection systems provide increasing economics as the duration and scale of the campaign increases. Initial investments can be recouped by reusing equipment and software on subsequent projects, making digital data collection more cost-effective for programs contemplating multiple eradications. Implications With proper pre-planning, digital data collection systems can be integrated with quantitative models that generate timely forecasts of the effort required to remove all target animals and estimate the probability that eradication has been achieved to a desired level of confidence, thus improving decision making power and further reducing total project costs.

Quantifying the Size of the Contraband Cell Phone Problem: Insights From a Large Rural State Penitentiary

2018 ◽  
Vol 98 (5) ◽  
pp. 630-648
Author(s):  
Eric Grommon ◽  
Jeremy Carter ◽  
Charles Scheer
Keyword(s):  
Data Collection ◽  
Cell Phone ◽  
Cell Phones ◽  
Correctional Facilities ◽  
Market Dynamics ◽  
Unique Data ◽  
Rural State ◽  
Data Collection Effort

Cell phones are one of the most challenging forms of contraband for correctional facilities. The size of this problem is difficult to quantify. Confiscation data are only able to tell a partial story. Through the use of a unique data collection effort, this research details the number of contraband cell phones within a facility and offers the first attempt to estimate the gap that exists between the number of contraband cell phones available and the number that are confiscated. In light of the findings, implications for policy and an agenda for research on contraband cell phone market dynamics are provided.

scholarly journals Modeling of energy amplification recorded within Greater Los Angeles using irregular structure

1994 ◽  
Vol 84 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Chandan K. Saikia ◽  
Douglas S. Dreger ◽  
Donald V. Helmberger
Keyword(s):  
Los Angeles ◽  
Surface Waves ◽  
Transfer Functions ◽  
Long Beach ◽  
Low Velocity ◽  
Time Duration ◽  
California Institute Of Technology ◽  
Downtown Los Angeles ◽  
Institute Of Technology ◽  
Energy Amplification

Abstract We have investigated energy amplification observed within Greater Los Angeles basin by analyzing regional waveforms recorded from several Nevada Test Site (NTS) nuclear explosions. Although the stations are located nearly at the same azimuth (distances ranging from 350 to 400 km), the seismograms recorded in Compton (the central part of the basin), Long Beach (the southern edge of the basin), and downtown Los Angeles are remarkably different, even for a common explosion. Following the onset of Lg waves, the Long Beach sites have recorded surface waves for more than 100 sec. From one explosion, the sites within downtown Los Angeles have recorded seismograms with strong 3-sec surface waves. These waves are not observed on the seismograms recorded in the neighboring hard-rock site California Institute of Technology (CIT) station. Thus, they must have been generated by local wave guides. Numerically, we modeled these 3-sec waves by convolving the CIT seismogram with the response of a sedimentary strata dipping gently (about 6°) from CIT toward downtown. We also examined the irregular basin effect by analyzing the variation of cumulative temporal energy across the basin relative to the energy recorded at CIT from the same explosion. Variation up to a factor of 30 was observed. To model the energy variation that is caused by extended surface waves in the Long Beach area, we used numerically simulated site transfer functions (STF) from a NNE-SSW oriented two-dimensional basin structure extending from Montebello to Palos Verdes that included low-velocity sedimentary material in the uppermost layers. These STFs were convolved with the CIT seismogram recorded from the MAST explosion. To simulate elongated duration of surface waves, we introduced in the upper sedimentary structure some discontinuous microbasin structures of varying size, each microbasin delaying the seismic waves propagating through them. Consequently, the surface-reflected phases through these structures are delayed and reflected into the upper medium by the underlying interfaces. This mechanism helps delayed energy to appear at a later time and result in a longer time duration at sites located at southern edge of the basin.

Empirical Strategies for Intersectional Research

2021 ◽  
pp. 29-46
Author(s):  
Christian Dyogi Phillips
Keyword(s):  
Los Angeles ◽  
Data Collection ◽  
Asian American ◽  
Demographic Data ◽  
Asian American Women ◽  
Candidate Emergence ◽  
Political Processes ◽  
Intersectionality Theory ◽  
Data Collection And Analysis

Chapter 2 specifies how the book’s research design operationalizes intersectionality theory through its multi-method and multilevel data collection and analysis. This includes an expanded discussion of how using this framework to analyze Asian American women and men, and Latina and Latino candidates, facilitates new understandings of the relationship between race-gendered political processes and electoral opportunity within those communities, and more generally across other groups. The chapter then details the data collection processes for the book’s original datasets. The first is the Gender Race and Communities in Elections dataset, encompassing candidate and district demographic data for every state legislative general election from 1996 to 2015 in 49 states. Next, the American Leadership Survey of state legislators fielded in 2015 is described. And finally, the design for a multi-method case study of Asian American and Latina/o candidate emergence in Los Angeles County is presented.

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