Composite Operators in the Twistor Formulation of N=4\mathcal{N}=4 SYM Theory

We incorporate gauge-invariant local composite operators into the twistor-space formulation of $\mathcal{N}=4$ Super Yang-Mills theory. In this formulation, the interactions of the elementary fields are reorganized into infinitely many interaction vertices and we argue that the same applies to composite operators. To test our definition of the local composite operators in twistor space, we compute several corresponding form factors, thereby also initiating the study of form factors using the position twistor-space framework. Throughout this letter, we use the composite operator built from two identical complex scalars as a pedagogical example; we treat the general case in a follow-up paper.Comment: letter, 5 pages, 1 figur

On form factors and correlation functions in twistor space

In this paper, we continue our study of form factors and correlation functions of gauge-invariant local composite operators in the twistor-space formulation of N=4 super Yang-Mills theory. Using the vertices for these operators obtained in our recent papers arXiv:1603.04471 and arXiv:1604.00012, we show how to calculate the twistor-space diagrams for general N^kMHV form factors via the inverse soft limit, in analogy to the amplitude case. For general operators without $\dot\alpha$ indices, we then reexpress the NMHV form factors from the position-twistor calculation in terms of momentum twistors, deriving and expanding on a relation between the two twistor formalisms previously observed in the case of amplitudes. Furthermore, we discuss the calculation of generalized form factors and correlation functions as well as the extension to loop level, in particular providing an argument promised in arXiv:1410.6310.Comment: 24+17 pages, 18 figures; v2: typos corrected, matches published versio

Сравнительная характеристика торфов Томской области и республики Алтай

В данной работе была проведена сравнительная характеристика торфов Томской области и республики Алтай. Для этих торфов были определены технический и групповой составы. В результате исследований выявлено, что торфа с месторождений Томской области и республики Алтай отличаются по степени разложения и зольности. В торфах республики Алтай получили большее содержание гуминовых кислот и лигнина по сравнению с торфами Томской области . Кроме этого, в торфах республики Алтай выявлено низкое содержание битумов и углеводного комплекса и повышенное содержание гуминовых кислот и лигнина. Установлено, что на базе месторождений республики Алтай возможна организация производства гуминовых кислот и битумов в ограниченных размерах.In this work the comparative characteristic of peats of the Tomsk region and Altai Republic has been carried out. For these peats, the technical and group compositions were determined. As a result of the researches it is revealed that peats from deposits of the Tomsk region and Altai Republic differ on extent of decomposition and an ash-content. In peats of Altai Republic have received the bigger content of humic acids and a lignin in comparison with peats of the Tomsk region. Besides, in peats of Altai Republic the low content of bitumens and a carbohydrate complex and the increased content of humic acids and a lignin is revealed. It is established that on the basis of fields of Altai Republic the organization of production of humic acids and bitumens in limited sizes is possible

A Twistorial Approach to Integrability in N=4 SYM

While the achievements in the study of N=4 Super Yang-Mills through the application of integrability are impressive, the precise origins of the exact solvability remain shrouded in mystery. In this note, we propose that viewing the problem through the lens of twistor theory should help to clarify the reasons for integrability. We illustrate the power of this approach by rederiving the model's one-loop spin chain dilatation operator in the SO(6) sector.Comment: 10 pages, 2 figures. This is the accepted version that has been published in Fortschritte der Physik 63, No. 2, 142-147 (2015

Recombinant hirudin for extended aortic surgery in patients with heparin-induced thrombocytopenia

AbstractJ Thorac Cardiovasc Surg 1999;118:191-

Rapid-prototyping of microscopic thermal landscapes in micro-focused Brillouin light scattering spectroscopy

Since temperature and its spatial and temporal variations affect a wide range of physical properties of material systems, they can be used to create reconfigurable spatial structures of various types in physical and biological objects. This paper presents an experimental optical setup for creating tunable two-dimensional temperature patterns on a micrometer scale. As an example of its practical application, we have produced temperature-induced magnetization landscapes in ferrimagnetic yttrium iron garnet films and investigated them using micro-focused Brillouin light scattering spectroscopy. It is shown that, due to the temperature dependence of the magnon spectrum, temperature changes can be visualized even for microscale thermal patterns.Comment: 5 pages, 4 figure

Patient satisfaction with divided anesthesia care.

BACKGROUND Up to now, no prospective cohort study using a validated questionnaire has assessed patients' expectation and perception of divided anesthesia care and its influence on patient satisfaction. OBJECTIVE We assessed patient satisfaction with divided anesthesia care in a district general hospital in Switzerland. We hypothesized that patient expectations, combined with their perceptions of the (un)importance of continuous anesthesia care would influence patient satisfaction. MATERIAL AND METHODS A total of 484 eligible in-patients receiving anesthesia from October 2019 to February 2020 were included and received preoperative information about divided care via a brochure and face-to-face. The primary outcome was the assessment of patient satisfaction with divided anesthesia care using a validated questionnaire. In group 1 continuity of care was considered important but not performed. In group 2 continuity was ensured. In group 3 continuity was regarded as not important and was not performed. In group 4 patients could not remember or did not answer. A psychometrically developed validated questionnaire was sent to patients at home after discharge. RESULTS A total of 484 completed questionnaires (response rate 81%) were analyzed. In group 1 (n = 110) the mean total dissatisfaction score was 25% (95% confidence interval [CI] 21.8-28.1), in group 2 (n = 61) 6.8% (95% CI 4.8-8.7), in group 3 (n = 223) 12.1% (95% CI 10.7-13.4), and in group 4 (n = 90) 15% (95% CI 11-18); ANOVA: p < 0.001, η = 0.43. Of the patients 286 (59%) considered continuity of care by the same anesthetist relatively unimportant (34%) or not important at all (25%). The other 40% considered it important (22%) or very important (18%). CONCLUSION Despite receiving comprehensive preoperative information about divided anesthesia care, 40% of patients still considered continuity of care by the same anesthetist important. We recommend further research evaluating whether and how patient expectations can be modified towards the common practice of divided care and patient satisfaction can be increased

The InflateSAR Campaign: Testing SAR Vessel Detection Systems for Refugee Rubber Inflatables

Countless numbers of people lost their lives at Europe’s southern borders in recent years in the attempt to cross to Europe in small rubber inflatables. This work examines satellite-based approaches to build up future systems that can automatically detect those boats. We compare the performance of several automatic vessel detectors using real synthetic aperture radar (SAR) data from X-band and C-band sensors on TerraSAR-X and Sentinel-1. The data was collected in an experimental campaign where an empty boat lies on a lake’s surface to analyse the influence of main sensor parameters (incidence angle, polarization mode, spatial resolution) on the detectability of our inflatable. All detectors are implemented with a moving window and use local clutter statistics from the adjacent water surface. Among tested detectors are well-known intensity-based (CA-CFAR), sublook-based (sublook correlation) and polarimetric-based (PWF, PMF, PNF, entropy, symmetry and iDPolRAD) approaches. Additionally, we introduced a new version of the volume detecting iDPolRAD aimed at detecting surface anomalies and compare two approaches to combine the volume and the surface in one algorithm, producing two new highly performing detectors. The results are compared with receiver operating characteristic (ROC) curves, enabling us to compare detectors independently of threshold selection

P38 mitogen activated protein kinase regulates endothelial VCAM-1 expression at the post-transcriptional level

The cytokine tumor necrosis factor (TNF) alpha was found to stimulate the p38 mitogen activated protein (MAP) kinase signalling cascade in human umbilical vein endothelial cells. TNFalpha increased the activity of the p38 substrate MAP kinase-activated-protein (MAPKAP) kinase 2 and the subsequent phosphorylation of the small heat shock protein Hsp27 about two to three fold. This stimulation was blocked almost completely by the specific p38 MAP kinase inhibitor SB203580. This inhibitor also suppressed the TNFalpha-induced surface expression of the endothelial adhesion molecule vascular cell adhesion molecule (VCAM)-1. In contrast, inhibition of p38 MAP kinase had no effect on the stimulated surface expression of the intercellular cell adhesion molecule (ICAM)-1. VCAM-1 mRNA accumulation induced by TNFalpha was not affected by SB203580, suggesting that the p38 MAP kinase signalling cascade regulates the endothelial expression of VCAM-1 at the post-transcriptional level