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As core stabilization exercise is essential for maintaining a stable spine and improving functional performance, understanding the activation of core muscles and the stabilization of the trunk and pelvis during such exercise is crucial. The purpose of this study was to investigate the muscle activation and stabilization of the lumbar–pelvic region during core stabilization exercise, with a specific focus on analyzing EMG and 3D motion kinematic data. The study aimed to understand how different tension settings on the reformer affect muscle activation and hip motion, as well as how these factors impact pelvic and trunk stability during the exercise. The reformer consists of a carriage that slides back and forth on rails, with springs providing resistance. The springs can be adjusted to vary the resistance level. Twenty-eight healthy women participating in this study were asked to perform 'side splits', a hip abduction exercise, on the reformer in both heavy and light tension settings. Activation of the internal oblique (IO), rectus abdominis (RA), multifidus (MU), costal lumbosacral (IL), gluteus medius (GM), and adductor muscles (AL) were measured using electromyography (EMG) and 3D motion. Kinematic data using an assay were also measured during exercise. GM, IO, and MU muscles were more active when heavy springs were used, and AL muscles were more active when light springs were used. Hip motion was more symmetrical when lighter springs were used with a greater range of hip motion. There was less pelvis and torso weight transfer and more torso and pelvis stability when the heavier springs were used. In this study, we confirmed that core stabilization exercise on an unstable surface activates the deep muscles of the abdomen and back and is effective for pelvic and trunk stabilization training.

Core stability is the ability to control the position and motion of the trunk over the pelvis and legs to allow the optimum production and transfer of force to the terminal segment in sporting activities. The effect of fatigue, especially core muscle fatigue, on stiffness as a performance index requires more study. This research aimed to investigate the effect of the core stabilization muscles' fatigue on lower limb stiffness during hopping. Thirty active basketball players participated in this study (age: 20.90 ± 1.49 years; weight: 60.30 ± 3.10 kg; height: 163.2 ± 5.04 cm). The hopping test (15 jumps) was performed before and after the fatigue protocol in three states including at a preferred (no frequency control), maximum, and 2.2 Hz frequency on the force plate. The stiffness of the lower extremities was measured before and after the fatigue protocol. The results of the dependent t-test showed core muscle fatigue led to reduced lower extremity stiffness under all three hopping-test conditions by 15.3–15.9% (p ≤ 0.005). It seems that core muscle function affects lower extremity stiffness, and can function as a performance index in athletes. Although performed in healthy volunteers, this study may have implications for injury prevention, highlighting the necessity to perform interspersed endurance training using the different body parts of the kinetic chain.

Abstract Background Effective strategies for the primary prevention of low back pain (LBP) remain elusive with few large-scale clinical trials investigating exercise and education approaches. The purpose of this trial was to determine whether core stabilization alone or in combination with psychosocial education prevented incidence of low back pain in comparison to traditional lumbar exercise. Methods The Prevention of Low Back Pain in the Military study was a cluster randomized clinical study with four intervention arms and a two-year follow-up. Participants were recruited from a military training setting from 2007 to 2008. Soldiers in 20 consecutive companies were considered for eligibility (n = 7,616). Of those, 1,741 were ineligible and 1,550 were eligible but refused participation. For the 4,325 Soldiers enrolled with no previous history of LBP average age was 22.0 years (SD = 4.2) and there were 3,082 males (71.3%). Companies were randomly assigned to receive traditional lumbar exercise, traditional lumbar exercise with psychosocial education, core stabilization exercise, or core stabilization with psychosocial education, The psychosocial education session occurred during one session and the exercise programs were done daily for 5 minutes over 12 weeks. The primary outcome for this trial was incidence of low back pain resulting in the seeking of health care. Results There were no adverse events reported. Evaluable patient analysis (4,147/4,325 provided data) indicated no differences in low back incidence resulting in the seeking of health care between those receiving the traditional exercise and core stabilization exercise programs. However, brief psychosocial education prevented low back pain episodes regardless of the assigned exercise approach, resulting in a 3.3% (95% CI: 1.1 to 5.5%) decrease over two years (numbers needed to treat (NNT) = 30.3, 95% CI = 18.2 to 90.9). Conclusions Core stabilization has been advocated as preventative, but offered no such benefit when compared to traditional lumbar exercise in this trial. Instead, a brief psychosocial education program that reduced fear and threat of low back pain decreased incidence of low back pain resulting in the seeking of health care. Since this trial was conducted in a military setting, future studies are necessary to determine if these findings can be translated into civilian populations. Trial Registration NCT00373009 at ClinicalTrials.gov - http://clinicaltrials.gov/

The Earths solid core is mostly composed of iron. However, despite being central to our understanding of core properties, the stable phase of iron under inner-core conditions remains uncertain. The two leading candidates are hexagonal close-packed and body-centred cubic (bcc) crystal structures, but the dynamic and thermodynamic stability of bcc iron under inner-core conditions has been challenged. Here we demonstrate the stability of the bcc phase of iron under conditions consistent with the centre of the core using ab initio molecular dynamics simulations. We find that the bcc phase is stabilized at high temperatures by a diffusion mechanism that arises due to the dynamical instability of the phase at lower temperatures. On the basis of our simulations, we reinterpret experimental data as support for the stability of bcc iron under inner-core conditions. We suggest that the diffusion of iron atoms in solid state may explain both the anisotropy and the low shear modulus of the inner core. ; Funding Agencies|Swedish Research Council (VR) [2013-5767, 2014-4750]; National Magnetic Confinement Fusion Program of China [2015GB118000]; China Scholarship Council; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009 00971]

Past and present attempts to stabilize war-torn Somalia through military, diplomatic and humanitarian interventions highlight the entanglements and interplay between local and foreign elites in policies and practices that have frequently and effectively undermined statebuilding in south-central Somalia. Existing analyses have focused predominantly on local actors and internal dynamics to account for the continuous political disorder in the former Somali Democratic Republic since 1991. In contrast, this study highlights the role of external aid in dysfunctional statebuilding efforts in Somalia. Rather than assuming that foreign actors are outside the local and national political settlements, such actors should rather be seen as an integral part of these processes. Consequently, the power and interests of both Somali and international actors must be taken into consideration in order to understand the shortcomings of stabilization policies. Persistent tactics by Somali elites—mobilizing, appropriating and redirecting foreign resources and agendas—have been at the core of failed statebuilding. Such tactics form part of what French Africanist Jean-François Bayart has described as 'extraversion'. Because Somali elites have regularly turned their participation in transitional governments into a resource appropriation tactic, statebuilding has become an end in itself rather than the outcome of a more profound process of actual state formation that would have entailed the centralization of coercion, the generation of public revenue or the building up of popular support. ; Past and present attempts to stabilize war-torn Somalia through military, diplomatic and humanitarian interventions highlight the entanglements and interplay between local and foreign elites in policies and practices that have frequently and effectively undermined statebuilding in south-central Somalia. Existing analyses have focused predominantly on local actors and internal dynamics to account for the continuous political disorder in the former Somali Democratic Republic since 1991. In contrast, this study highlights the role of external aid in dysfunctional statebuilding efforts in Somalia. Rather than assuming that foreign actors are outside the local and national political settlements, such actors should rather be seen as an integral part of these processes. Consequently, the power and interests of both Somali and international actors must be taken into consideration in order to understand the shortcomings of stabilization policies. Persistent tactics by Somali elites—mobilizing, appropriating and redirecting foreign resources and agendas—have been at the core of failed statebuilding. Such tactics form part of what French Africanist Jean-François Bayart has described as 'extraversion'. Because Somali elites have regularly turned their participation in transitional governments into a resource appropriation tactic, statebuilding has become an end in itself rather than the outcome of a more profound process of actual state formation that would have entailed the centralization of coercion, the generation of public revenue or the building up of popular support.

The breakdown of the Argentine currency board in early 2002 produced a number of obituaries that often quite rashly declared the country's monetary constitution since 1991 the main responsible for its recent near-catastrophic economic collapse. Contrary to such rather one-sided negative ascriptions to the currency board system, the intention of this paper is to give a comprehensive and balanced description of the currency board model in theory, as well as to name its functioning conditions under today's economic and political conditions prevailing in developing and transforming countries. It will become clear that the success of a currency board in terms of lasting stabilization of an economy not only depends on its initial design (e.g. the choice of the anchor currency, of the exchange rate, the legal and institutional fixings) but also on an ongoing process of economic and institutional reform that extends from a general macroeconomic and especially public sector streamlining to banking sector reforms, product and labour market deregulation, and to a general realignment of the economy towards exportorientation and international competitiveness. The extent to which these reforms are tackled and completed decides over the degree to which the economy is able to absorb real shocks without incurring high economic and social adaptation costs, hence over the degree to which a country is able to benefit from the currency board's strengths without falling victim to its potentially severe weaknesses. Along with some basic reflections about the concept and motivation of modern currency boards, sections 1-3 give a brief overview over the historical background of the currency board idea as well as of its implementation. Section 4 focuses on the constitutional elements of a currency board, while section 5 provides the core of the discussion of pros and cons of currency boards, depicting the system's strengths and weaknesses as well as the conditions under which they materialize. Section 6 will discuss under which circumstances a currency board is a good choice for a country, and ask whether less strict stabilization policies might be able to deliver the hoped-for benefits less costly. Some problems related to the questions of duration and termination of currency boards are addressed in section 7. Finally, section 8 will give a brief exposition of the idea of dual currency boards as a theoretical extension of the currency board model which promises to eliminate one of the biggest immanent threats to a currency board.

Stabilization is a contestable concept of intervention in violent conflicts. Often, it is either uncritically supported or rejected. In this article, we criticize current conceptualisations and practices of stabilization and newly introduce a dynamic approach for stabilization that yields a transformative potential. By distinguishing static vs. dynamic approaches to stabilization, we address the widespread dilemma that so-called stabilization measures seem unable to avoid instability and protracted violence in the long-term. Our analysis of the three policy fields peacekeeping, train & equip programmes and migration management in Mali reveals the dominance of static elements in stabilization practice. Instead, our article proposes to see a transformative variant of stabilization measures that enhances long-term security and development. We argue that there are two dynamic approaches of stabilization that policy-makers and practitioners can apply in (post-)conflict societies: state-centred liberal peacebuilding that takes its normative core seriously, and non-state centric peacebuilding that acknowledges alternative lived orders.

"This book examines the relationship between contemporary UN stabilization mandates and the non-legal concept of 'human security'. Human security aims to provide a bottom-up and localised perspective and set of priorities to address insecurity. Despite this, the mobilisation of the human security discourse is an underexplored area of research. The book is divided into three sections. The first section outlines the importance of stabilization as an emerging area of peacekeeping practice and outlines the analytical framework of human security to be used in the research. The second section applies the analytical framework to three case studies: the UN Multidimensional Integrated Stabilization Mission in Mali (MINUSMA); the UN Multidimensional Integrated Stabilization Mission in the Central African Republic (MINUSCA); and the UN Mission in South Sudan (UNMISS). The case studies explore five facets of human security: where the mission has sought to carry out its activities in line with the human rights and the rule of law; where space is provided to identify the vital core; where vulnerabilities are identified and building resilience has been attempted; what aspects of protection are focused on by the mission; and if individuals are empowered to act on their own behalf and implement solutions to security threats. The third section expounds the incompatibility of the two competing sides of stabilization and draws wider conclusions on how best to utilise the human security concept. The book will be a valuable resource for academics, policymakers and practitioners working on UN peacekeeping generally, and those specifically looking at stabilization, from international relations, international law, peace and conflict studies, security studies and human rights"--

This article looks narrowly at whether a 'human security' approach can be seen in a UN peace operation that pursues stabilization, namely the United Nations Multidimensional Integrated Stabilization Mission in the Central African Republic (MINUSCA). The UN's interpretation of stabilization has not been expressly set out, but stabilization missions typically work alongside the host state to extend state authority and use robust force to counter spoilers. Human security is a concept which is rights-based, promotes the 'vital core', has a concern for vulnerability, utilizes preventative protection methods, and empowers local persons to have agency in the peace process. Attempts have been made to institutionalize and mainstream human security practices within the UN. An analytical framework of human security is outlined in this article and used to assess to what extent the mandate of MINUSCA pursues human security-based goals. An extensive review of UN documentation looks at the mandate and practice of MINUSCA and it is argued that the mission does seek to empower local people, engage in a bottom-up manner and entrench the rule of law. The analytical framework also casts light on aspects of the stabilization mandate which are problematic such as militarization and cooperation with the host state.

"The creation of economic institutions that can function well under substantial uncertainties -- Black Swans -- is analogous to the dilemmas confronting our hunter-gatherer forefathers in the face of large-scale ecological unpredictability. The ultimate solution was not the development of a super hunter-gatherer technology that could ride out repeated catastrophe, but rather the invention, in neolithic times, of culturally-adapted 'farmed' ecosystems constructed to maximize food yield and minimize risks of famine. Recent advances in evolutionary and ecosystem theory applied to economic structure and process may permit construction of both new economic theory and new tools for data analysis that can help in the design of more robust economic institutions. This may result in less frequent and less disruptive transitions, and enable the design of culturally-specific systems less affected by those that do occur. This unique and innovative book applies cutting-edge methods from cognitive science and evolutionary theory to the problem of the necessary stabilization of economic processes. At the core of this book is the establishment of a statistics-like toolbox for the study of empirical data that is consistent with generalized evolutionary approaches. This toolbox enables the construction of both new economic theories and methods of data analysis that can help in the design of more robust economic institutions. This in turn will result in less frequent and less disruptive Black Swans, and enable as well the design of culturally-specific systems less affected by those that do occur"--

We examine business cycle spillovers in the European Union over the period 1977–2014. The results of our analysis reveal that: (i) The total spillover indices are of high magnitude and very responsive to extreme economic events. (ii) The direction and magnitude of spillovers among group members (i.e. Eurozone core, Eurozone periphery, new Euro Area countries and non-European Monetary Union countries) is changing overtime. (iii) The widening of the European debt crisis can be explained by business cycle shocks in the whole Eurozone periphery. Thus, appropriate macroprudential stabilization policies aiming to steer peripheral economies towards growth should be formulated.

We examine business cycle spillovers in the European Union over the period 1977–2014. The results of our analysis reveal that: (i) The total spillover indices are of high magnitude and very responsive to extreme economic events. (ii) The direction and magnitude of spillovers among group members (i.e. Eurozone core, Eurozone periphery, new Euro Area countries and non‐European Monetary Union countries) is changing overtime. (iii) The widening of the European debt crisis can be explained by business cycle shocks in the whole Eurozone periphery. Thus, appropriate macroprudential stabilization policies aiming to steer peripheral economies towards growth should be formulated.

This paper deals with the essential problems of the current economic crisis in the European Union analyzed from the aspect of the core – periphery development model. In the first part of the paper theoretical concepts are presented for explanation the reasons for divergence in the economic development among regions. In the second part of the paper special attention is given to the real convergence among the selected EU member countries. Regarding this, the paper arises the dilemma thus the stabilization programs, will be successful recipe for solving the problems of the current crisis.

This paper summarizes a global Green New Deal program that can advance climate stabilization as well as rising mass living standards and an expansion of decent job opportunities. The core features of this program are massive global investments in energy efficiency and clean renewable energy so that clean energy supplants the existing fossil-fuel-dominant global energy system. Through annual investments in the range of 2 percent of global GDP in clean energy and a corresponding contraction in fossil fuel consumption, the global economy can maintain an absolute decoupling trajectory—i.e., economic growth proceeds while CO2 emissions fall to zero within 30–40 years. The paper also shows that a steady contraction of global GDP—i.e., "degrowth"—does not provide a viable climate stabilization framework. JEL Classification: Q54, Q56, Q58

Examines the Neo-Assyrian Empire of the tenth-seventh century B.C. to argue that the Assyrians' use of new innovations in administrative technology not only greatly helped to assure the growth of their empire but was the primary reason they were able to become the first large empire of the central world-system core. Ironically, innovations like standardized weight systems, currency rationalization, & taxation mechanisms were originally developed by semi-peripheral states outside the Assyrian Empire but later turned into tools of imperial stabilization. The nature, extent, & length of Assyrian hegemony are described. Three phases of Assyrian expansion are identified: agricultural intensification; the discovery of trade; & western expansion into the very different territory of Levant & Egypt. Different methods of control used by the Assyrians included the manipulation of elites, trade manipulation, bureaucratic co-optation, & the control of capital for trade ventures. The implications for world systems theory are discussed. References. J. Lindroth