Real-Time Virtualization and Cloud Computing

In recent years, we have observed three major trends in the development of complex real-time embedded systems. First, to reduce cost and enhance flexibility, multiple systems are sharing common computing platforms via virtualization technology, instead of being deployed separately on physically isolated hosts. Second, multi-core processors are increasingly being used in real-time systems. Third, developers are exploring the possibilities of deploying real-time applications as virtual machines in a public cloud. The integration of real-time systems as virtual machines (VMs) atop common multi-core platforms in a public cloud raises significant new research challenges in meeting the real-time latency requirements of applications. In order to address the challenges of running real-time VMs in the cloud, we first present RT-Xen, a novel real-time scheduling framework within the popular Xen hypervisor. We start with single-core scheduling in RT-Xen, and present the first work that empirically studies and compares different real-time scheduling schemes on a same platform. We then introduce RT-Xen 2.0, which focuses on multi-core scheduling and spanning multiple design spaces, including priority schemes, server schemes, and scheduling policies. Experimental results demonstrate that when combined with compositional scheduling theory, RT-Xen can deliver real-time performance to an application running in a VM, while the default credit scheduler cannot. After that, we present RT-OpenStack, a cloud management system designed to support co-hosting real-time and non-real-time VMs in a cloud. RT-OpenStack studies the problem of running real-time VMs together with non-real-time VMs in a public cloud. Leveraging the resource interface and real-time scheduling provided by RT-Xen, RT-OpenStack provides real-time performance guarantees to real-time VMs, while achieving high resource utilization by allowing non-real-time VMs to share the remaining CPU resources through a novel VM-to-host mapping scheme. Finally, we present RTCA, a real-time communication architecture for VMs sharing a same host, which maintains low latency for high priority inter-domain communication (IDC) traffic in the face of low priority IDC traffic

Embodied fortitude: An introduction to the Finnish construct of sisu

In the Nordic country of Finland, a cultural construct known as sisu has been used for centuries to describe the enigmatic power that enables individuals to push through unbearable challenges. Sisu, however, lacks a direct translation and the construct has remained poorly defined and understudied. This article seeks to answer the question “What is sisu?” through the thematic analysis of two sets of qualitative data (n = 500 and n = 569) that were collected as part of a survey (N = 1,208) among a sample group of primarily Finnish respondents. The most prominent part of the conceptual core of sisu is the ability to surpass one’s preconceived limitations by accessing stored-up energy reserves. Sisu is invoked by adversity and is more about finding energy in the moment than about long-term endurance, goal-setting and achievement. Instead of being about conscious willing or mental fortitude, it implies a strength that is connected to the visceral and somatic dimension of human endurance. I propose that sisu points to a universal phenomenon of latent energy in the human system, lends it a name and contributes toward a more culturally rich conversation on the human experience of overcoming adversity across life challenges

Võimestamine ja võimestumine – mõisteanalüüs

Empowerment on ingliskeelne termin, mida on juba aastakümneid kasutatud eri valdkondades, sealhulgas ka tervishoius. Eestikeelsetes allikates on alates 2000. a kasutatud mõistet “võimestamine”. Kahjuks on termini sisu ebaselge nii eesti- kui ka ingliskeelses kirjanduses ning seda ei ole siiani ühemõtteliselt defineeritud. Kasutades Walkeri ja Avanti mõisteanalüüsi meetodit, uuriti mõistete “võimestamine” ja “võimestumine” sisu selgemaks tegemiseks, täpsustamiseks ning defineerimiseks eesti- ja ingliskeelseid sõnaraamatuid, teatmeteoseid ja erialakirjandust. Eesti Arst 2007; 86 (10): 736–74

Põhiseaduse § 28 ratio legis. Riigi kohustuste ulatus igaühe tervise kaitsel

Eesti Vabariigi põhiseaduses on fikseeritud igaühe õigus tervise kaitsele. Selle põhiõiguse tegelikku sisu ja riigi kohustusi põhiõiguse tagamiseks on erialases kirjanduses vähe käsitletud. Artiklis on püütud avada õiguse tervise kaitsele mõtet ja sisu, kasutades ajaloolist tõlgendamismeetodit, s.t kuidas sai sellest aru ja soovis seda mõista seadusandja. Eesti Arst 2006; 85 (12): 855–86

Spartan Daily, December 4, 1972

Volume 60, Issue 46https://scholarworks.sjsu.edu/spartandaily/5681/thumbnail.jp

From boxes and arrows to conversation and negotiation: or how research should be amusing, awful, and artificial

The story of how a graduate student went from formalism to data, a brief tale of how engineering without tradition can lead thought in the right direction, and a mild caution of how intellectual skepticism is worth little without a corresponding dose of intellectual enthusiasm

Anatomy of Isolated Monopole in Abelian Projection of SU(2) Lattice Gauge Theory

We study the structure of the isolated static monopoles in the maximal Abelian projection of SU(2) lattice gluodynamics. Our estimation of the monopole radius is $\approx 0.06 fm$.Comment: 4 pages, LaTeX2e, 1 figure (epsfig

Spartan Daily, December 14, 1972

Volume 60, Issue 54https://scholarworks.sjsu.edu/spartandaily/5689/thumbnail.jp

Spartan Daily, January 8, 1973

Volume 60, Issue 58https://scholarworks.sjsu.edu/spartandaily/5693/thumbnail.jp