LEO constellation orbital debris threat assessment - A case study

2000 ◽  
Author(s):  
Michael Fudge
Keyword(s):  
Threat Assessment ◽  
Orbital Debris

A Threat Assessment Method Based on Hierarchies and Modules

2014 ◽  
Vol 18 (1) ◽  
pp. 93-99
Author(s):  
Fang Deng ◽  
◽  
Xinan Liu ◽  
Zhihong Peng ◽  
Jie Chen
Keyword(s):  
Data Fusion ◽  
Threat Assessment ◽  
Assessment Method ◽  
Fusion Technology ◽  
Low Level ◽  
Information Classification ◽  
Level Data ◽  
High Level

With the development of low-level data fusion technology, threat assessment, which is a part of high-level data fusion, is recognized by an increasing numbers of people. However, the method to solve the problem of threat assessment for various kinds of targets and attacks is unknown. Hence, a threat assessment method is proposed in this paper to solve this problem. This method includes tertiary assessments: information classification, reorganization, and summary. In the tertiary assessments model, various threats with multi-class targets and attacks can be comprehensively assessed. A case study with specific algorithms and scenarios is shown to prove the validity and rationality of this method.

An integrated approach for threat assessment and damage identification on built heritage in climate-sensitive territories: the Albenga case study (San Clemente church)

2018 ◽  
Vol 10 (4) ◽  
pp. 485-499 ◽  
Author(s):  
Mattia Previtali ◽  
Chiara Stanga ◽  
Thomas Molnar ◽  
Lore Van Meerbeek ◽  
Luigi Barazzetti
Keyword(s):  
Damage Identification ◽  
Threat Assessment ◽  
Integrated Approach ◽  
Built Heritage

Reliability-Based Crack Threat Assessment and Management

2020 ◽  
Author(s):  
Jason Yan ◽  
Shenwei Zhang ◽  
Shahani Kariyawasam ◽  
Dongliang Lu ◽  
Tammie Matchim
Keyword(s):  
Crack Growth ◽  
Safety Factor ◽  
Structural Integrity ◽  
Threat Assessment ◽  
Assessment Model ◽  
Deterministic Approach ◽  
Safety Level ◽  
Characteristic Values ◽  
The Impact

Abstract Crack or crack-like anomaly is one of the major threats to the safety and structural integrity of oil and gas transmission pipelines. The crack threat is usually managed by hydrostatic test or regular in-line inspection (ILI). For a given crack ILI pipeline tally, operators need to identify critical anomalies, determine appropriate response time, and whether pressure restriction (derate) is required. Traditionally, a deterministic approach is used to determine the mitigation plan based on characteristic values of pipe properties, conservative crack sizing and crack growth rate, and further considering a minimum required safety factor. This study introduces a reliability-based approach to make the mitigation decision with full details. The annual probability of failure (POF) is evaluated for each reported crack anomaly by Monte Carlo simulation technique considering all the uncertainties associated with pipe geometry, material properties, crack size measurement, and assessment model error explicitly. Both environmental and cyclic fatigue load driven crack growth are considered following API RP 1176. A reliability-based mitigation threshold is proposed and calibrated against the deterministic minimum required safety factor for maintaining the system to a consistent safety level. Two case studies were conducted to demonstrate the advantages of the reliability-based assessment approach in this paper. Case Study #1 considers an NPS 20 transmission gas pipeline with more than 2000 ILI reported crack anomalies. Compared to the deterministic approach using conservative characteristic values, the reliability-based approach can reduce the number of required mitigation activities significantly without compromising safety. Case Study #2 assumes a severe crack defect on an NPS 34 liquid pipeline to demonstrate the impact of fatigue driven crack growth on POF. The POF of crack anomalies can be compared and combined with other threats, e.g. external corrosion, to evaluate the quantitative risk throughout pipeline systems. The proposed framework in this study could be used by operators to improve the crack assessment programs.

Treating the untreatable? The biopsychosocial treatment of delusional disorder: a case study

2020 ◽  
Vol 28 (4) ◽  
pp. 433-437
Author(s):  
Terri-ann Goodwin ◽  
Tim J. Lowry ◽  
Carla Meurk ◽  
Darren Neillie
Keyword(s):  
Psychosocial Intervention ◽  
Threat Assessment ◽  
Evidence Base ◽  
Delusional Disorder ◽  
Psychological Treatments ◽  
Biopsychosocial Approach ◽  
Therapeutic Goals ◽  
Therapeutic Benefits ◽  
Assessment Centre

Objective: Delusional disorder (DD) is well recognised, but its treatment is controversial. This article presents a case study that highlights the therapeutic benefits associated with assertive biopsychosocial treatment of DD. Method: The literature on pharmacological and psychological treatments for DD is briefly reviewed, and a case example from the Queensland Fixated Threat Assessment Centre is given to illustrate a comprehensive biopsychosocial treatment framework. Results: Combined pharmacological and psychosocial intervention resulted in stabilisation and improvement in mental state for the case described. Conclusions: There is an emergent evidence base for an assertive biopsychosocial approach to treating DD. The case study demonstrates that a range of therapeutic goals is achievable.

scholarly journals ROMANIAN`S SECURITY: EXPLAINING YOUNG CITIZENS’ PERCEPTIONS ABOUT NATIONAL SECURITY

2021 ◽  
Vol 1 (72) ◽  
pp. 66-79
Author(s):  
Raluca LUȚAI ◽  
Marius GRAD
Keyword(s):  
National Security ◽  
Single Case ◽  
Explanatory Power ◽  
Threat Assessment ◽  
Structured Interviews ◽  
Demographic Profiles ◽  
Generation Z ◽  
Gender Education ◽  
The Common

Abstract: In the last decades the issue of national security has become more transparent and a subject of interest for the common citizen. Much scholarly attention is paid to how people perceive national security and issues related to it. However, we know very little about what young citizens, members of generation Z, believe about this aspect. This paper addresses this gap in the literature and analyzes how young citizens perceive subjects related to national security. It uses Romania as a single-case study and semi-structured interviews conducted in January 2021-March 2021 with young citizens coming from different socio-demographic profiles, to explain the variation in how they understand national security. The paper seeks to test the explanatory power of several variables such as knowledge about contemporary events, media exposure and threat assessment. The paper also controls for several socio-demographic characteristics such as age, gender, education and medium of residence. The findings indicate that citizens’ perceptions are influenced by a combination of general attitudes towards the political system and society, the education factor and specific attitudes about potential threats.Keywords: Generation Z; security perception, Romania, national security.

A case study on threat assessment: Learning critical lessons to prevent school violence.

2018 ◽  
Vol 5 (3) ◽  
pp. 121-136 ◽  
Author(s):  
Sarah Goodrum ◽  
Andrew J. Thompson ◽  
Kyle C. Ward ◽  
William Woodward
Keyword(s):  
School Violence ◽  
Threat Assessment

The Problem Behaviour Program

2021 ◽  
pp. 536-553
Author(s):  
Troy E. McEwan ◽  
Rajan Darjee
Keyword(s):  
Risk Assessment ◽  
Problem Behaviors ◽  
Threat Assessment ◽  
Governance Structure ◽  
Evidence Based ◽  
Problem Behaviour ◽  
Specialist Service ◽  
Assessment And Treatment ◽  
And Function

The Problem Behaviour Program (PBP) in Melbourne, Australia, is a specialist service that provides assessment and treatment to people who engage in violence, stalking, harmful sexual behavior, fire-setting, or other problem behaviors, regardless of the presence or absence of clients’ mental illness. The purpose of the PBP is to provide comprehensive and evidence-based assessment of, advice about, and treatment for people presenting with these difficult and sometimes frightening behaviors. Given the nature of the clientele, staff expertise in threat assessment, as well as risk assessment more generally, is a key requirement for working in the PBP. This chapter describes the establishment and function of the clinic and the underlying model of care, governance structure, and staffing profile. A detailed case study of a client referred because of concern about the potential for serious sexual violence is used to show how threat and risk assessment is essential to the functioning of the PBP and how such assessment can inform effective intervention for a range of problematic and harmful behaviors.

The Genesis and Internal Dynamics of El Salvador's People's Revolutionary Army, 1970–1976

2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO
Keyword(s):  
Latin America ◽  
El Salvador ◽  
Early Years ◽  
Left Wing ◽  
Internal Dynamics ◽  
Internal Coherence ◽  
The 1960S

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.

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