The objective of this study is to investigate the heart rate (HR) accuracy measured at the wrist with the photoplethysmography (PPG) technique with a Fitbit Charge 2 (Fitbit Inc) in wheelchair users with spinal cord injury, how the activity intensity affects the HR accuracy, and whether this HR accuracy …

The concept of deterrence has dominated Western strategic thought for some seven decades. It shows no signs of easing its grip. In the face of any new security threat, such as terrorism or cyber-attacks, one of the fi rst questions to be asked is ‘ can this be deterred? ’ Even when the answer is not very …

The challenge of deterrence — discouraging states from taking unwanted actions, especially military aggression — has again become a principal theme in U.S. defence policy. This chapter reviews the fundamentals of deterrence in theory and practice. It surveys basic de fi nitions and types of deterrence, …

This chapter examines the theoretical principles that underpin conventional deterrence and its evolution in practice over the past century. It disaggregates conventional deterrence approaches into four strategic categories based on their geographic scope and the nature of the threats they employ, and …

The North Atlantic Treaty Organization (NATO) is back in the business of deterring aggression on the part of Russia. This return to great power deterrence has brought widely acknowledged military challenges related to power projection, force modernization, and burden sharing but also and notably a political …

In recent literature, much attention has been paid to factors that affect nuclear deterrence and stability from the outside: new missile defence systems, non-nuclear (conventional) high-precision long-range weapons, the in fl uence of third and threshold nuclear states, space weapons, and — more recently …

The U.S. provides extended nuclear deterrence to allies in Europe, Asia, and elsewhere. The 2018 NPR signals several potentially destabilizing policies, including lowering the threshold for use and adding low-yield capabilities, and it emphasizes the need for nuclear superiority. This chapter argues …

In 2017 NATO initiated Enhanced Forward Presence (eFP) in the Baltics to deter Russia. While most studies analyse eFP from the perspective of NATO or the troop contributing countries, this chapter addresses the question how the host nations, i.e. in this contribution Estonia, Latvia and Lithuania, perceive …

Both deterrence theory and deterrence practice are evolving to address contemporary strategic challenges. In the military domain, states progressively integrate and synchronise military operations. Outside of it, they exploit grey zone strategies that combine different instruments of in fl uence across …

This chapter traces the evolution of Russian thinking on deterrence and makes three arguments. First, the Russian approach to deterrence differs from the Western conceptualization of this term. Deterrence a la Ruse is much broader than the meaning that Western experts have in mind. It stands for the …