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While these journals still did not receive an impact factor until the next year, they did contribute citations to the calculation of other journals' impact factors. [ 4 ] [ 5 ] In July 2022, Clarivate announced that journals in the ESCI obtain an impact factor effective from JCR Year 2022 first released in June 2023.
The impact factor relates to a specific time period; it is possible to calculate it for any desired period. For example, the JCR also includes a five-year impact factor, which is calculated by dividing the number of citations to the journal in a given year by the number of articles published in that journal in the previous five years. [14] [15]
Introduction to homeland security: Principles of all-hazards risk management (Butterworth-Heinemann, 2011) Ramsay, James D. et al. Theoretical Foundations of Homeland Security: Strategies, Operations, and Structures (Routledge, 2021) Sylves, Richard T. Disaster policy and politics: Emergency management and homeland security (CQ press, 2019).
It began operations in 2003, formed as a result of the Homeland Security Act of 2002, enacted in response to the September 11 attacks. With more than 240,000 employees, [60] DHS is the third-largest cabinet department Homeland security policy is coordinated at the Presidential level by the Homeland Security Council.
Homeland security is an American national security term for "the national effort to ensure a homeland that is safe, secure, and resilient against terrorism and other hazards where American interests, aspirations, and ways of life can thrive" [1] to the "national effort to prevent terrorist attacks within the United States, reduce the vulnerability of the U.S. to terrorism, and minimize the ...
Kirstjen M. Nielsen, then secretary of Homeland Security, wrote in a Washington Post article, "The U.S. isn’t prepared for the growing threat of drones," and was defenseless against them.
Security Studies is a peer-reviewed quarterly academic journal covering international relations published by Routledge. It was established in 1991. The current editor-in-chief is Ron Hassner (University of California, Berkeley). According to the Journal Citation Reports, it has a 2017 impact factor of 1.778. [1]
Homeland Security Secretary: Trump has chosen South Dakota Governor Kristi Noem to serve as the next Homeland Security Secretary, two sources familiar with the decision said on Nov. 12, 2024.