A study of course deviations during cross-country soaring

Several models are developed for studying the impact of deviations from course during cross country soaring flights. Analyses are performed at the microstrategy and macrostrategy levels. Two types of lift sources are considered: concentrated thermals and thermal streets. The sensitivity of the optimum speed solutions to various model, piloting and performance parameters is evaluated. Guides are presented to provide the pilot with criterions for making in-flight decisions. In general, course deviations are warranted during weak lift conditions, but are less justifiable with moderate to strong lift conditions

Tevatron Collider Program - Physics, Results, Future?

An overview of more than 25 years of the Tevatron Collider program at Fermi National Accelerator Laboratory in Batavia, near Chicago, Illinois, USA, is presented. The physics goals of the program itself, the Tevatron accelerator design characteristics and some of its achievements are described. A selected set of the past and ongoing physics analyses and measurements performed by CDF and D0 collaborations are summarized. Also, in view of the modified plans and schedule of the Large Hadron Collider (LHC) at CERN, the future of the Tevatron program is discussed.Comment: Presented at Cracow Epiphany Conference of the First Year of the LHC, Cracow, Poland, January 1012, 201

"ATLAS Overview and Main Results"

An overview of the ATLAS experiment, its physics program and a selection of the most important results, based on the data taken in pp collisions at energies of 7 and 8 TeV in 2011 and 2012, respectively, is presented. The question of possible changes in our understanding of elementary particles physics, after a discovery of a new boson of the mass of ~125 GeV last summer, is addressed. During the current long shutdown, the Large Hadron Collider (LHC) will be upgraded to allow the LHC experiments to study pp collisions at the energy of ~13 TeV.The ATLAS plans for future analyses and measurements with the new data to be taken after 2015, are summarized.Comment: The paper is the print version of an invited talk given at LISHEP 2013, Rio de Janeiro, March 17-24, 201

Know How and Acts of Faith

My topic in this paper is the nature of faith. Much of the discussion concerning the nature of faith proceeds by focussing on the relationship between faith and belief. In this paper, I explore a different approach. I suggest that we approach the question of what faith involves by focussing on the relationship between faith and action. When we have faith, we generally manifest it in how we act; we perform acts of faith: we share our secrets, rely on other’s judgment, refrain from going through our partner’s emails, let our children prepare for an important exam without our interference. Religious faith, too is manifested in acts of faith: attending worship, singing the liturgy, fasting, embarking on a pilgrimage. I argue that approaching faith by way of acts of faith, reveals that faith is a complex mental state whose elements go beyond doxastic states towards particular propositions. It also involves conative states and – perhaps more surprisingly – know how. This has consequences for the epistemology of faith: the role of testimony and experts, the importance of practices, and what we should make of Pascal’s advice for how to acquire faith

Towards Data-driven Simulation of End-to-end Network Performance Indicators

Novel vehicular communication methods are mostly analyzed simulatively or analytically as real world performance tests are highly time-consuming and cost-intense. Moreover, the high number of uncontrollable effects makes it practically impossible to reevaluate different approaches under the exact same conditions. However, as these methods massively simplify the effects of the radio environment and various cross-layer interdependencies, the results of end-to-end indicators (e.g., the resulting data rate) often differ significantly from real world measurements. In this paper, we present a data-driven approach that exploits a combination of multiple machine learning methods for modeling the end-to-end behavior of network performance indicators within vehicular networks. The proposed approach can be exploited for fast and close to reality evaluation and optimization of new methods in a controllable environment as it implicitly considers cross-layer dependencies between measurable features. Within an example case study for opportunistic vehicular data transfer, the proposed approach is validated against real world measurements and a classical system-level network simulation setup. Although the proposed method does only require a fraction of the computation time of the latter, it achieves a significantly better match with the real world evaluations

Everything comes down to money? Migration and working life trajectories in a (post-)socialist context

Using 25 life histories of Poles, this paper addresses the way in which migration has had an impact upon the trajectories of individuals’ working lives both under socialism and after 1989. In our discussion, we explore some of the connections between different waves of migration, bringing together historical and contemporary research on migration as well as engaging with current debates on post-socialism that problematize the disjuncture between socialist and post-socialist experience. Our contention here is that one way in which socialism and post-socialism might be integrated is through focusing on the experiences of individuals whose lives span these eras. We suggest that while there are continuities across the periods, there are also disjunctures created not only by the changed politico-legal context, but also through changed attitudes towards the role of migration as part of individual life trajectories

PdBI U/LIRG Survey (PULS): Dense Molecular Gas in Arp 220 and NGC 6240

Aims. We present new IRAM Plateau de Bure Interferometer observations of Arp 220 in HCN, HCO$^{+}$, HN$^{13}$C J=1-0, C$_{2}$H N=1-0, SiO J = 2-1, HNCO J$_{k,k'}$ = 5$_{0,4}$ - 4$_{0,4}$, CH$_{3}$CN(6-5), CS J=2-1 and 5-4 and $^{13}$CO J=1-0 and 2-1 and of NGC 6240 in HCN, HCO$^{+}$ J = 1-0 and C$_{2}$H N = 1-0. In addition, we present Atacama Large Millimeter/submillmeter Array science verification observations of Arp 220 in CS J = 4-3 and CH$_{3}$CN(10-9). Various lines are used to analyse the physical conditions of the molecular gas including the [$^{12}$CO]/[$^{13}$CO] and [$^{12}$CO]/[C$^{18}$O] abundance ratios. These observations will be made available to the public. Methods. We create brightness temperature line ratio maps to present the different physical conditions across Arp 220 and NGC 6240. In addition, we use the radiative transfer code RADEX and a Monte Carlo Markov Chain likelihood code to model the $^{12}$CO, $^{13}$CO and C$^{18}$O lines of Arp 220 at ~2" (~700 pc) scales, where the $^{12}$CO and C$^{18}$O measurements were obtained from literature. Results. Line ratios of optically thick lines such as $^{12}$CO show smoothly varying ratios while the line ratios of optically thin lines such as $^{13}$CO show a east-west gradient across Arp 220. The HCN/HCO$^{+}$ line ratio differs between Arp 220 and NGC 6240, where Arp 220 has line ratios above 2 and NGC 6240 below 1. The radiative transfer analysis solution is consistent with a warm (~40 K), moderately dense (~10$^{3.4}$ cm$^{-3}$) molecular gas component averaged over the two nuclei. We find [$^{12}$CO]/[$^{13}$CO] and [$^{12}$CO]/[C$^{18}$O] abundance ratios of ~90 for both. The abundance enhancement of C$^{18}$O can be explained by stellar nucleosynthesis enrichment of the interstellar medium.Comment: 17 pages, 9 figures, accepted for publication in A&

Mission critical technology development

Mission critical technology development is presented in the form of the viewgraphs. The following subject areas are covered: organization/philosophy overview; fault management technology; and introduction to optical processing