You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: Toward Intelligent Security Robots: A Survey 
Chapter Title:  D. Law-Enforcement Robots 
1. Abstract of Cited Paper (BIB001):  This paper reviews “socially interactive robots”: robots for which social human–robot interaction is important. We begin by discussing the context for socially interactive robots, emphasizing the relationship to other research fields and the different forms of “social robots”. We then present a taxonomy of design methods and system components used to build socially interactive robots. Finally, we describe the impact of these robots on humans and discuss open issues. An expanded version of this paper, which contains a survey and taxonomy of current applications, is available as a technical report [T. Fong, I. Nourbakhsh, K. Dautenhahn, A survey of socially interactive robots: concepts, design and applications, Technical Report No. CMU-RI-TR-02-29, Robotics Institute, Carnegie Mellon University, 2002]. © 2003 Elsevier Science B.V. All rights reserved.

Literature Review:
LERs are mostly autonomous and semiautonomous vehicles, which are deployed for crime-fighting episodes. BIB001 This class embodies advanced perception that elaborates high-level recognition, decision making, and scenario planning. LERs also address the issues mentioned for surveillance robots, by proficiently perceiving and interpreting human activity and behavior. This includes detecting and recognizing gestures or gates, monitoring and classifying responsive activities, and measuring the human feedback BIB002 . Despite the significant similarities, the fundamental difference between the surveillance and the lawenforcement class is that LERs employ versatile architectures to handle weaponry. This category includes robots with evolved as well as inspired characteristics from the surveillance category, where some of these robots are surveillance robots with special operational faculties to fight crime. Some of the faculties related to these robots are high-level surveillance and intruder detection, utilizing biometric feature analysis, fire, smoke, and gas detection, as well as gun or weapon recognition. Historically, we have seen that crime-fighting robots, such as the ones of this category, are meant to be autonomous, whereas their deployment considers crowded or highly sensitive areas. LERs are regarded as the third-generation security robots employed with enhanced capabilities to fight crime, and, recently, have become quite popular in mobile security. For this last category, some of the most popular LER projects have been collected and placed in Table IV .