719 research outputs found

    The ‘Face’ Barriers to Partnership

    Get PDF
    Spectrum monitoring and interference detection are crucial for the satellite service performance and the revenue of SatCom operators. Interference is one of the major causes of service degradation and deficient operational efficiency. Moreover, the satellite spectrum is becoming more crowded, as more satellites are being launched for different applications. This increases the risk of interference, which causes anomalies in the received signal, and mandates the adoption of techniques that can enable the automatic and real-time detection of such anomalies as a first step towards interference mitigation and suppression. In this paper, we present a Machine Learning (ML)-based approach able to guarantee a real-time and automatic detection of both short-term and long-term interference in the spectrum of the received signal at the base station. The proposed approach can localize the interference both in time and in frequency and is universally applicable across a discrete set of different signal spectra. We present experimental results obtained by applying our method to real spectrum data from the Swedish Space Corporation. We also compare our ML-based approach to a model-based approach applied to the same spectrum data and used as a realistic baseline. Experimental results show that our method is a more reliable interference detector.This project has received funding from the European Research Council project AGNOSTIC (742648), from the Swedish Space Corporation, and from the Swedish National Space Agency under the National Space Engineering Research Programme 3 (NRFP3).QC 20191028</p

    The ‘Face’ Barriers to Partnership

    Get PDF
    Teaching and Learning Together in Higher Education1271-4United State

    Implications of a regional order in flux: Chinese and Russian relations with the United Arab Emirates

    Get PDF
    © 2020 Department of Politics and International Studies. The transition away from post-Cold War unipolarity has repercussions for regional orders that have been shaped and sustained by US preponderance. Small states like the United Arab Emirates (UAE), traditionally reliant upon extra-regional powers to balance against more powerful neighbours, are adopting an increasingly muscular foreign policy to hedge against a possible reduced US regional role. Consequently, there is an opening for non-traditional powers to adopt larger roles. Primarily using an outside-in approach, this paper explores the nature of China and Russia’s more active bilateral engagement with the UAE. It finds that in an environment where political instability within the larger Middle East combines with uncertainty about US intentions, regional leaders and leaders of extra-regional powers with interests in the Persian Gulf have to adjust accordingly, either to protect those interests or to take advantage of the opportunity to expand their presence in a strategically and economically important theatre

    Quo Vadis? External Powers in a Changing Gulf Region

    Get PDF
    This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book analyzes the changing dynamics of the Gulf monarchies\u27 (Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, and the United Arab Emirates) international relations with extra-regional powers. It analyzes the evolution of the United Kingdom\u27s relations with the Gulf monarchies. Long the prominent power in the Gulf, the United Kingdom\u27s role has inevitably diminished since leaving the region in 1971. The book traces the evolution of China\u27s relations with the Gulf monarchies. China has transitioned from a marginal regional actor to a major partner of every state in the Gulf, with economic relations bringing the two sides closer together. It considers the growth of South Korea\u27s relations with the Gulf monarchies. The book approaches to a Chinese security role in the Gulf: a traditional power projection, using tools of military statecraft, and the one that Chinese officials describe as \u27security through development.\u2

    Introduction

    Get PDF
    This chapter sets the stage for the key themes found throughout this volume, first by framing the Gulf regional order within the context of a shift in international order. US signaling of a reduced role in the Gulf is leading policymakers both in the Gulf and beyond to recalibrate their thinking on regional affairs. It then builds upon literature on ‘Asianization’ to explain how and why the issue of Gulf order is increasingly a concern for policymakers in the Asian countries analyzed in this book. Finally, it provides a brief overview of each chapter

    External Powers and the Gulf Monarchies

    Get PDF
    The Gulf monarchies have been generally perceived as status quo actors reliant on the USA for their security, but in response to regional events, particularly the Arab Spring of 2011, they are pursuing more activist foreign policies, which has allowed other international powers to play a larger role in regional affairs. This book analyses the changing dynamic in this region, with expert contributors providing original empirical case studies that examine the relations between the Gulf monarchies and extra-regional powers, including the USA, Russia, China, India, Brazil, Turkey, Japan, South Korea, France, and the United Kingdom. At the theoretical level, these case studies explore the extent to which different international relations and international political economy theories explain change in these relationships as the regional, political and security environment shifts. Focusing on how and why external powers approach their relationships with the Gulf monarchies, contributors ask what motivates external powers to pursue deeper involvement in an unstable region that has seen three major conflicts in the past 40 years. Addressing an under-analysed, yet important topic, the volume will appeal to scholars in the fields of international relations and international political economy as well as area specialists on the Gulf and those working on the foreign policy issues of the extra-regional powers studied

    Facing Facts: Facial Injuries from Stand-up Electric Scooters

    Get PDF
    Background Stand-up electric scooters (SES) are a popular public transportation method. Numerous safety concerns have arisen since their recent introduction. Methods A retrospective chart review was performed to identify patients presenting to the emergency departments in Indianapolis, who sustained SES-related injuries. Results A total of 89 patients were included in our study. The average patient age was 29 ± 12.9 years in a predominantly male cohort (65.2%). No patient was documented as wearing a helmet during the event of injury. Alcohol intoxication was noted in 14.6% of accidents. Falling constituted the leading trauma mechanism (46.1%). Injuries were most common on Saturday (24.7%) from 14h00 to 21h59 (55.1%). Injury types included: abrasions/contusions (33.7%), fractures (31.5%), lacerations (27.0%), or joint injuries (18.0%). The head and neck region (H&N) was the most frequently affected site (42.7%). Operative management under general anesthesia was necessary for 13.5% of injuries. Nonoperative management primarily included conservative orthopedic care (34.8%), pain management with nonsteroidal anti-inflammatory drugs (NSAIDs) (34.8%) and/or opioids (4.5%), bedside laceration repairs (27.0%), and wound dressing (10.1%). Individuals sustaining head and neck injuries were more likely to be older (33.8 vs. 25.7 years, p=0.003), intoxicated by alcohol (29.0% vs. 3.9%, p=0.002), and requiring CT imaging (60.5% vs. 9.8%, p <0.001). Conclusion Although SESs provide a convenient transportation modality, unregulated use raises significant safety concerns. More data need to be collected to guide future safety regulations

    Commentary: Unlike parents, AI will never tire of entertaining our children. Here’s the catch.

    Get PDF
    We may all be living on the same planet, but the personalised experience of online platforms creates numerous parallel worlds that fragments our communicative cultures - this problem quietly escapes our attention, and it is dividing us to such extent that it is becoming increasingly difficult for us to respectfully converse and collaborate with others. Seeing how these personalised bubbles are making our youths struggle to understand and work with others, my worry is that this problem will worsen with children raised by AI. If we are not careful, we risk raising a generation of children with severely skewed perceptions of the world due to the personalised bubble AI creates around them. To have such skewed perceptions at such a critical stage of development, we may not be able to break them out of their bubbles when they are older
    corecore