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Vulnerability refers to the inability (of a system or a unit) to withstand the effects of a hostile environment. A window of vulnerability (WOV) is a time frame within which defensive measures are diminished, compromised or lacking.
The understanding of social and environmental vulnerability, as a methodological approach, involves the analysis of the risks and assets of disadvantaged groups, such as the elderly. The approach of vulnerability in itself brings great expectations of social policy and gerontological planning. Types of vulnerability include social, cognitive, environmental, emotional or military.
In relation to hazards and disasters, vulnerability is a concept that links the relationship that people have with their environment to social forces and institutions and the cultural values that sustain and contest them. “The concept of vulnerability expresses the multi-dimensionality of disasters by focusing attention on the totality of relationships in a given social situation which constitute a condition that, in combination with environmental forces, produces a disaster”. It is also the extent to which changes could harm a system, or to which the community can be affected by the impact of a hazard or exposed to the possibility of being attacked or harmed, either physically or emotionally: "we were in a vulnerable position".
Within the body of literature related to vulnerability, major research streams include questions of methodology, such as: measuring and assessing vulnerability, including finding appropriate indicators for various aspects of vulnerability, up- and down scaling methods, and participatory methods.[clarification needed] Vulnerability research covers a complex, multidisciplinary field including development and poverty studies, public health, climate studies, security studies, engineering, geography, political ecology, and disaster risk management. This research is of importance and interest for organizations trying to reduce vulnerability – especially as related to poverty and other Millennium Development Goals. Many institutions are conducting interdisciplinary research on vulnerability. A forum that brings many of the current researchers on vulnerability together is the Expert Working Group (EWG). Researchers are currently working to refine definitions of “vulnerability”, measurement and assessment methods, and effective communication of research to decision makers.
In its sense, social vulnerability is one dimension of vulnerability to multiple stressors (agent responsible for stress) and shocks, including abuse, social exclusion and natural hazards. Social vulnerability refers to the inability of people, organizations, and societies to withstand adverse impacts from multiple stressors to which they are exposed. These impacts are due in part to characteristics inherent in social interactions, institutions, and systems of cultural values. In this respect, there is a need to place an increased emphasis on assets and entitlements for understanding ‘catastrophe’ as opposed to solely the strength or severity of shocks.
A cognitive vulnerability, in cognitive psychology, is an erroneous belief, cognitive bias, or pattern of thought that is believed to predispose the individual to psychological problems. It is in place before the symptoms of psychological disorders start to appear, such as high neuroticism, and after the individual encounters a stressful experience, the cognitive vulnerability shapes a maladaptive response that may lead to a psychological disorder. In psychopathology, cognitive vulnerability is constructed from schema models, hopelessness models, and attachment theory. Attentional bias is one mechanism leading to faulty cognitive bias that leads to cognitive vulnerability. Allocating a danger level to a threat depends on the urgency or intensity of the threshold. Anxiety is not associated with selective orientation.
Environmental or climate change
The definition of vulnerability by Brene Brown, is "uncertainty, risk, and emotional exposure". Brown goes on to suggest that vulnerability is our most accurate measure of courage: to be vulnerable, to allow ourselves to be seen. Vulnerability is typically thought of as the center of emotions such as: grief, shame, fear, disappointment; but it is also the center and birthplace of love, belonging, authenticity, creativity, courage, and accountability. Emotional vulnerability is also impacted by climate change. Increase in awareness and impact leads to heightened emotional responses. When these vulnerabilities are supported and processed through conversation with an emotionally safe 'other', this vulnerability can lead to resilience and the capacity to support others. 
In military terminology, vulnerability is a subset of survivability, the others being susceptibility and recoverability. Vulnerability is defined in various ways depending on the nation and service arm concerned, but in general it refers to the near-instantaneous effects of a weapon attack. In aviation it is defined as the inability of an aircraft to withstand the damage caused by the man-made hostile environment. In some definitions, recoverability (damage control, firefighting, restoration of capability) is included in vulnerability. Some military services develop their own concept of vulnerability.
Invulnerability is a common feature found in science fiction and fantasy, in particular in superhero fiction, as depicted commonly in novels, comic books and video games. In such stories, it is a quality that makes a character impervious to pain, damage or loss of health.
In video games, it can be found in the form of "power-ups" or cheats; when activated via cheats, it is often referred to as "god mode". Generally, it does not protect the player from certain instant-death hazards, most notably "bottomless" pits from which, even if the player were to survive the fall, they would be unable to escape. As a rule, invulnerability granted by power-ups is temporary, and wears off after a set amount of time, while invulnerability cheats, once activated, remain in effect until deactivated, or the end of the level is reached. "Depending on the game in question, invulnerability to damage may or may not protect the player from non-damage effects, such as being immobilized or sent flying."
In mythology, talismans, charms, and amulets were created by magic users for the purpose of making the wearer immune to injury from both mystic and mundane weapons.
- Emotional insecurity
- Exploitation of labour
- Representativeness heuristic
- True self and false self
- Vulnerabilities exploited by manipulators
- Vulnerability and care theory of love
- Vulnerability in computing
- Vulnerability index
- Vulnerable adult
- "KBpedia: Vulnerability Reference Concept". KBpedia. Retrieved 2019-11-21.
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- Sanchez-Gonzalez, D (2015). "Physical-social environments and aging population from environmental gerontology and geography. Socio-spatial implications in Latin America". Revista de Geografía Norte Grande. 60 (60): 97–114. doi:10.4067/S0718-34022015000100006.
- Bankoff, Greg; et al. (2004). Mapping Vulnerability: Disasters, Development and People. London: Earth scan.
- Villa-gran, Juan Carlos. "Vulnerability: A conceptual and methodological review." SOURCE. No. 2/2006. Bonn, Germany.
- Rumpf, Clemens M.; Lewis, Hugh G.; Atkinson, Peter M. (2017-03-27). "Population vulnerability models for asteroid impact risk assessment". Meteoritics & Planetary Science. 52 (6): 1082–1102. arXiv:1702.05798. doi:10.1111/maps.12861. ISSN 1086-9379. S2CID 49320450.
- "Promotion of Roma's access to Education [Social Impact]. WORKALÓ. The creation of new occupational patterns for cultural minorities: the Gypsy Case (2001-2004). Framework Programme 5 (FP5)". SIOR, Social Impact Open Repository.
- Birkmann, Joern (editor). 2006. Measuring Vulnerability to Natural Hazards – Towards Disaster Resilient Societies. UNU Press.
- Wolters, M., Kuenzer, C., 2015: Vulnerability Assessments of Coastal River Deltas – Categorization and Review. Journal of Coastal Conservation, DOI exposed to the possibility of being attacked or harmed, either physically or emotionally. 10.1007/s11852-015-0396-6
- Luis Flores Ballesteros. "What determines a disaster?" 54 Pesos May. 2008:54 Pesos 11 Sep 2008. http://54pesos.org/2008/09/11/what-determines-a-disaster/ Archived 2012-03-20 at the Wayback Machine
- See also Daniel R. Curtis, 'Pre-industrial societies and strategies for the exploitation of resources. A theoretical framework for understanding why some settlements are resilient and some settlements are vulnerable to crisis', https://www.academia.edu/1932627/Pre-industrial_societies_and_strategies_for_the_exploitation_of_resources._A_theoretical_framework_for_understanding_why_some_settlements_are_resilient_and_some_settlements_are_vulnerable_to_crisis
- Riskind, John H.; Black, David (2005). "Cognitive Vulnerability". In Freeman, Arthur; Felgoise, Stephanie H.; et al. (eds.). Encyclopedia of Cognitive Behavior Therapy. New York: Springer. pp. 122–26. ISBN 9781429411738.
- Jeronimus B.F.; Kotov, R.; Riese, H.; Ormel, J. (2016). "Neuroticism's prospective association with mental disorders halves after adjustment for baseline symptoms and psychiatric history, but the adjusted association hardly decays with time: a meta-analysis on 59 longitudinal/prospective studies with 443 313 participants". Psychological Medicine. 46 (14): 2883–2906. doi:10.1017/S0033291716001653. PMID 27523506.
- Ingram, Rick (February 2003). "Origins of Cognitive Vulnerability to Depression" (PDF). Cognitive Therapy and Research. 27 (1): 77–88. doi:10.1023/a:1022590730752. ISSN 0147-5916. S2CID 16148365.
- Mathews, Andrew; MacLeod, Colin (1 April 2005). "Cognitive Vulnerability to Emotional Disorders". Annual Review of Clinical Psychology. 1 (1): 167–195. doi:10.1146/annurev.clinpsy.1.102803.143916. PMID 17716086.
- Füssel, Hans-Martin (2005-12-01). "Vulnerability in Climate Change Research: A Comprehensive Conceptual Framework". Cite journal requires
- IPCC (2007a). "Climate Change 2007: Synthesis Report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (Core Writing Team, Pachauri, R.K and Reisinger, A. (eds.))". IPCC, Geneva, Switzerland. Retrieved 2009-05-20.
- Brown, Brene (2019). Braving the Wilderness: the Quest for True Belonging and the Courage to Stand Alone. Sounds True. p. 154.
- Brown, Brene (2012). The power of vulnerability. Sounds True.
- Kieft, Jasmine and Bendell, Jem (2021) The responsibility of communicating difficult truths about climate influenced societal disruption and collapse: an introduction to psychological research. Institute for Leadership and Sustainability (IFLAS) Occasional Papers Volume 7. University of Cumbria, Ambleside, UK..(Unpublished)
- Ball, Robert (2003). The Fundamentals of Aircraft Combat Survivability Analysis and Design, 2nd Edition. AIAA Education Series. p. 603. ISBN 978-1-56347-582-5.
- Carlo, Kopp (5 July 2005). "Warship Vulnerability". ausairpower.net.
- Madigan, Michael L (2017). Handbook of Emergency Management Concepts: A Step-by-Step Approach. CRC Press. ISBN 978-1351337472.
- William Godwin (1876). "Lives of the Necromancers". p. 17.
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- Community based vulnerability mapping in Búzi, Mozambique (GIS and Remote Sensing)
- MunichRe Foundation
- Satellite Vulnerability
- Survivability/Lethality Analysis – US Army
- RESIST RESIST Vulnerability Assessment Code
- Top Computer Vulnerabilities
- United Nations University Institute of Environment and Human Security
- VULNERABILITY LABORATORY (Verified Vulnerability Research Project)
- Vulners vulnerability database with API