Strategies for improving the precision of fishing and natural mortality estimates from multiyear tagging models: a case study

2001 ◽  
Vol 52 (8) ◽  
pp. 1649 ◽  
Author(s):  
S. D. Frusher ◽  
S. D. Frusher ◽  
J. M. Hoenig ◽  
J. M. Hoenig
Keyword(s):  
Monte Carlo ◽  
Cost Effective ◽  
Reporting Rate ◽  
Careful Consideration ◽  
The Other ◽  
Natural Mortality ◽  
Potential Benefits ◽  
North Western ◽  
Mortality Estimates

Fisheries scientists and managers want precise estimates of fishing and natural mortality for assessments and management decisions. Because tagging can be an expensive option, maximizing potential benefits requires careful consideration of experimental design. We evaluated four options for improving the precision of estimates by conducting Monte Carlo simulations of a fishery patterned after that for the rock lobsters in north-western Tasmania, Australia. Improving tag-reporting rate and increasing the duration of the tagging study provided greater improvements in precision than increasing either the number of lobsters tagged per tagging event or the number of tagging events each year. A design based on twice-a-year tagging for three years to determine tagreporting rate followed by an additional two or more years of once-a-year tagging provided the most precise estimates of natural mortality of all the designs considered. This design was also cost effective relative to the other options, but tag-reporting rate must be constant over the period of the study. If constancy cannot be assumed, then years of multiple tagging events may have to be interspersed among the years with single tagging events. Further improvements in mortality estimates from this multiyear tagging model could be achieved with improved tagreporting rate.

Quantification, Optimization and Uncertainty Modeling in Information Security Risks

2010 ◽  
Vol 23 (2) ◽  
pp. 33-52 ◽  
Author(s):  
Sanjay Goel ◽  
Eitel J.M. Lauría
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Uncertainty Modeling ◽  
Quantitative Model ◽  
Government Agency ◽  
The Other ◽  
Risk Exposure ◽  
Security Risk ◽  
Security Risks

In this paper, the authors present a quantitative model for estimating security risk exposure for a firm. The model includes a formulation for the optimization of controls as well as determining sensitivity of the exposure of assets to different threats. The model uses a series of matrices to organize the data as groups of assets, vulnerabilities, threats, and controls. The matrices are then linked such that data is aggregated in each matrix and cascaded across the other matrices. The computations are reversible and transparent allowing analysts to answer what-if questions on the data. The exposure formulation is based on the Annualized Loss Expectancy (ALE) model, and uncertainties in the data are captured via Monte Carlo simulation. A mock case study based on a government agency is used to illustrate this methodology.

scholarly journals Estimating natural and fishing mortality and tag reporting rate of southern rock lobster (Jasus edwardsii) from a multiyear tagging model

2001 ◽  
Vol 58 (12) ◽  
pp. 2490-2501 ◽  
Author(s):  
S D Frusher ◽  
J M Hoenig
Keyword(s):  
Mortality Rates ◽  
Fishing Effort ◽  
Reporting Rate ◽  
Standard Errors ◽  
Natural Mortality ◽  
Fishing Mortality ◽  
Rock Lobster ◽  
Relative Standard ◽  
Jasus Edwardsii ◽  
Mortality Estimates

Fishing and natural mortality rates and tag reporting rate for rock lobsters (Jasus edwardsii) in northwest Tasmania, Australia, were estimated using multiyear tagging models. These estimates are necessary for assessment of the resource. Several models were examined that had either two or three tagging events each year, and either combined sexes or kept sexes separate. The model that best described the dynamics of the fishery utilized three tagging events within a year. The year was divided into discrete periods and, within each year, fishing effort and duration of period were used to apportion fishing and natural mortalities, respectively, to the periods. The separation of fishing mortalities by sex was not found to improve the models. Although high (1.0–1.2·year–1), the instantaneous fishing mortality estimates were comparable to estimates obtained from other methods and the relative standard errors were low. Reporting rate estimates were also precise and indicated a lack of participation by the fishing industry. Estimates of natural mortality were low (0.00–0.02·year–1) but imprecise.

Finite Element Analysis of Pipeline Global Walking With Spanning and Lateral Buckling

2014 ◽  
Author(s):  
Gang Duan ◽  
Andy Tang ◽  
Xinhai Qi ◽  
Jianxia Zhong
Keyword(s):  
Cost Effective ◽  
The Other ◽  
Elevation Change ◽  
Lateral Buckling ◽  
Element Analysis ◽  
Start Up ◽  
Systematic Response ◽  
Single Pipe ◽  
Pipeline Design

This paper investigates High Pressure and/or High Temperature (HPHT) design of a pipeline across an escarpment with significant seabed undulations and elevation change from drill center (DC) to riser touch down point (TDP). The pipeline has a tendency to walk towards the riser during pipeline start-up / shut-down (SD) operations due to seabed slope and riser bottom tension in a case study. A hold-back pile at the uphill pipeline end near DC to arrest walking, along with the riser bottom tension applied at the other end of the pipeline, results in significant tensions in the pipeline and substantial spans over escarpment. The pipeline spanning lengths, lateral buckling amplitudes and walking distances and their variations during the start-up / shut-down cycles are presented and discussed. Both wet-insulated single pipe (WISP) and pipe-in-pipe (PIP) options are studied and compared. Interactions among pipeline global walking, spanning and lateral buckling are observed. In-depth understanding of pipeline systematic response will help perform a safe and cost-effective pipeline design.

scholarly journals Management of Maritime Pine: Energetic Potential with Alternative Silvicultural Guidelines

2021 ◽  
Author(s):  
Teresa Fonseca ◽  
José Lousada
Keyword(s):  
Forest Fires ◽  
National Level ◽  
Initial Density ◽  
Cost Effective ◽  
Maritime Pine ◽  
The Other ◽  
Stand Yield ◽  
Softwood Species ◽  
Silvicultural Guidelines

The interest in the use of energy of the forests has been increasing in recent decades. Biomass has the potential to provide a cost-effective and sustainable supply of renewable energy. Moreover, it could be valuable for reducing the severity of forest fires and create employment in extremely needy regions. This chapter brings to discuss the effect of forest management on the potential of energy provided by the woodlands. The authors selected as a case study the management of maritime pine (Pinus pinaster Ait.), an important softwood species in the southwest of Europe and, in particular, in Portugal where it represents around 22% of the forest area. A summary of traditional and new silvicultural guidelines for the species, used or proposed to be followed at the national level, is presented. The study follows with the evaluation of stand yield and the potential of energy associated with four alternative silvicultural guidelines. Two scenarios follow traditional standards (an initial density of 1100–1200 trees/ha), while the other two consider managing a high density stand (an initial density of 40,000 trees/ha). Simulations were performed with the ModisPinaster model. The results show that the new designs provide a considerable yield in terms of biomass and energy.

Corporate Social Disclosure: A Case Study Of SAIL (Steel Authority of India Limited)

2016 ◽  
Vol 3 (01) ◽  
Author(s):  
Shalini Singh ◽  
Sanaya Khanna
Keyword(s):  
The Other ◽  
Public Image ◽  
Business And Society ◽  
The Public ◽  
Corporate Social Disclosure ◽  
Potential Benefits ◽  
Corporate Social ◽  
National Economies ◽  
Social Disclosure

Corporate Social Responsibility (CSR) is used to envelop both social and environment issues. Business and society are interdependent on each other. The wellbeing of one depends on the wellbeing of the other especially in big companies and corporations, it's seen as a vital tool to promote and improve the public image. CSR may present a win- win situation for society and business. Understanding of the potential benefits of CSR for the competitiveness of individual companies and for national economies can help encourage the spread of CSR practice. Presents study deals with the corporate social disclosure practices adopted by the company especially the SAIL( Steel Authority of India limited). In the present paper an attempt has been made to identify and analyze the corporate social mandatory and non-mandatory disclosures made by SAIL and a comparison between the both i.e. mandatory and non-mandatory disclosures has been made through a disclosure index. Result indicates that there exists a significance difference between the mandatory and non-mandatory of disclosures made by SAIL. And the company is making more efforts towards the fulfillment of mandatory requirements rather than the non-mandatory requirements.

Teletinnitus Program at the VA Gulf Coast Veterans Health Care System

2014 ◽  
Vol 4 (1) ◽  
pp. 23-29
Author(s):  
Constance Hilory Tomberlin
Keyword(s):  
Health Care ◽  
Patient Satisfaction ◽  
Patient Care ◽  
Health Care System ◽  
Gulf Coast ◽  
New Technology ◽  
Cost Effective ◽  
Veterans Health ◽  
Potential Benefits ◽  
Care System

There are a multitude of reasons that a teletinnitus program can be beneficial, not only to the patients, but also within the hospital and audiology department. The ability to use technology for the purpose of tinnitus management allows for improved appointment access for all patients, especially those who live at a distance, has been shown to be more cost effective when the patients travel is otherwise monetarily compensated, and allows for multiple patient's to be seen in the same time slots, allowing for greater access to the clinic for the patients wishing to be seen in-house. There is also the patient's excitement in being part of a new technology-based program. The Gulf Coast Veterans Health Care System (GCVHCS) saw the potential benefits of incorporating a teletinnitus program and began implementation in 2013. There were a few hurdles to work through during the beginning organizational process and the initial execution of the program. Since the establishment of the Teletinnitus program, the GCVHCS has seen an enhancement in patient care, reduction in travel compensation, improvement in clinic utilization, clinic availability, the genuine excitement of the use of a new healthcare media amongst staff and patients, and overall patient satisfaction.

Development and regional planning within the decentralized administrative frame: case study (the Jordanian Experiment)

2018 ◽  
Vol 1 (2) ◽  
pp. 60-72
Author(s):  
Mansour Safran
Keyword(s):  
Regional Planning ◽  
The Other ◽  
Negative Effects ◽  
Administrative Procedures ◽  
The Way

This aims to review and analyze the Jordanian experiment in the developmental regional planning field within the decentralized managerial methods, which is considered one of the primary basic provisions for applying and success of this kind of planning. The study shoed that Jordan has passed important steps in the way for implanting the decentralized administration, but these steps are still not enough to established the effective and active regional planning. The study reveled that there are many problems facing the decentralized regional planning in Jordan, despite of the clear goals that this planning is trying to achieve. These problems have resulted from the existing relationship between the decentralized administration process’ dimensions from one side, and between its levels which ranged from weak to medium decentralization from the other side, In spite of the official trends aiming at applying more of the decentralized administrative policies, still high portion of these procedures are theoretical, did not yet find a way to reality. Because any progress or success at the level of applying the decentralized administrative policies doubtless means greater effectiveness and influence on the development regional planning in life of the residents in the kingdom’s different regions. So, it is important to go a head in applying more steps and decentralized administrative procedures, gradually and continuously to guarantee the control over any negative effects that might result from Appling this kind of systems.   © 2018 JASET, International Scholars and Researchers Association

2D Color-Intensity Representation of Ultrasonic Thickness Gauge Measurements

2020 ◽  
pp. 1192-1198
Author(s):  
M.S. Mohammad ◽  
Tibebe Tesfaye ◽  
Kim Ki-Seong
Keyword(s):  
Cost Effective ◽  
The Other ◽  
Thickness Gauge ◽  
Color Intensity ◽  
Digital Readout ◽  
Flat Surfaces ◽  
Video Cameras ◽  
Wide Range ◽  
Cost Effective Alternative ◽  
Ultrasonic Thickness

Ultrasonic thickness gauges are easy to operate and reliable, and can be used to measure a wide range of thicknesses and inspect all engineering materials. Supplementing the simple ultrasonic thickness gauges that present results in either a digital readout or as an A-scan with systems that enable correlating the measured values to their positions on the inspected surface to produce a two-dimensional (2D) thickness representation can extend their benefits and provide a cost-effective alternative to expensive advanced C-scan machines. In previous work, the authors introduced a system for the positioning and mapping of the values measured by the ultrasonic thickness gauges and flaw detectors (Tesfaye et al. 2019). The system is an alternative to the systems that use mechanical scanners, encoders, and sophisticated UT machines. It used a camera to record the probe’s movement and a projected laser grid obtained by a laser pattern generator to locate the probe on the inspected surface. In this paper, a novel system is proposed to be applied to flat surfaces, in addition to overcoming the other limitations posed due to the use of the laser projection. The proposed system uses two video cameras, one to monitor the probe’s movement on the inspected surface and the other to capture the corresponding digital readout of the thickness gauge. The acquired images of the probe’s position and thickness gauge readout are processed to plot the measured data in a 2D color-coded map. The system is meant to be simpler and more effective than the previous development.

The Relationship between Working Environment and Internship Satisfaction Level: A Case Study Of A 4-Star Hotel Restaurant In Germany

2019 ◽  
Vol 2 (4) ◽  
pp. 276-291
Author(s):  
Chatarina Natalia Putri
Keyword(s):  
Career Development ◽  
Working Hours ◽  
Learning Opportunities ◽  
Working Environment ◽  
The Other ◽  
Satisfaction Level ◽  
Supervisory Support ◽  
Support Organization ◽  
The Relationship

There are many factors that can lead to internship satisfaction. Working environment is one of the factors that will result to such outcome. However, many organizations discarded the fact of its importance. The purpose of this study is to determine whether there is a significant relationship between working environment and internship satisfaction level as well as to determine whether the dimensions of working environment significantly affect internship satisfaction. The said dimensions are, learning opportunities, supervisory support, career development opportunities, co-workers support, organization satisfaction, working hours and esteem needs. A total of 111 questionnaires were distributed to the respondents and were processed by SPSS program to obtain the result of this study. The results reveal that learning opportunities, career development opportunities, organization satisfaction and esteem needs are factors that contribute to internship satisfaction level. In the other hand, supervisory support, co-workers support and working hours are factors that lead to internship dissatisfaction. The result also shows that organization satisfaction is the strongest factor that affects internship satisfaction while co-workers support is the weakest.

‘Behind the Poetic Fiction’: Freud, Schnitzler and Feminine Subjectivity

2004 ◽  
Vol 6 (2) ◽  
pp. 201-223
Author(s):  
Elizabeth Goodstein
Keyword(s):  
Sigmund Freud ◽  
The Other ◽  
Modernist Literature ◽  
Arthur Schnitzler ◽  
Feminine Subjectivity ◽  
The Uncanny ◽  
Poetic Fiction ◽  
Psychoanalytic Theories

In 1922 Sigmund Freud wrote to fellow Viennese author and dramatist Arthur Schnitzler: ‘I believe I have avoided you out of a sort of fear of my double’. Through a series of reflections on this imagined doubling and its reception, this paper demonstrates that the ambivalent desire for his literary other attested by Freud's confession goes to the heart of both theoretical and historical questions regarding the nature of psychoanalysis. Bringing Schnitzler's resistance to Freud into conversation with attempts by psychoanalytically oriented literary scholars to affirm the Doppengängertum of the two men, it argues that not only psychoanalytic theories and modernist literature but also the tendency to identify the two must be treated as historical phenomena. Furthermore, the paper contends, Schnitzler's work stands in a more critical relationship to its Viennese milieu than Freud's: his examination of the vicissitudes of feminine desire in ‘Fräulein Else’ underlines the importance of what lies outside the oedipal narrative through which the case study of ‘Dora’ comes to be centered on the uncanny nexus of identification with and anxious flight from the other.

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