Consistency of data on soft photon production in hadronic interactions

The glob model of Lichard and Van Hove and the modified soft annihilation model (MSAM) of Lichard and Thompson are used as a phenomenological tool for relating results from various experiments on soft photon production in high energy collisions. The total phenomenological expectation is composed of contributions from classical bremsstrahlung, the soft annihilation model and the glob model. The empirical excess above the background from hadronic decays at very small longitudinal momenta of photons is well reproduced, as well as that for transverse momenta pT >~ 10 MeV/c. Some data do not require the glob model and MSAM components in the phenomenological mixture, but do not exclude them. On the basis of consistency of all data with the total theoretical expectation we argue that the results of all experiments are mutually consistent. The models are unable to describe the excess of ultrasoft photons (pT <~ 10 MeV/c), seen by some, but not all, experiments. This may indicate an as yet unknown projectile-mass-dependent production mechanism. Possible relations of soft photon production to other phenomena are discussed. A simple-to-use, but physically equivalent version of the glob model is developed, which enables an easy check of presented results.Comment: 25 pages, RevTeX, epsf.sty, 12 embedded figure

INFLUENCE OF DIFFERENT TILLAGE SYSTEMS ON YIELD AND SELECTED QUALITATIVE PARAMETERS OF SUGAR BEET

V poľnom polyfaktorovom pokuse s cukrovou repou bol sledovaný vplyv odrôd (Fox, Zenith) a rôznych spôsobov hospodárenia na pôde (A - zber slamy, podmietka, maštaľný hnoj, stredná orba, hlboká orba, urovnanie povrchu pôdy; B - zber slamy, podmietka, zelené hnojenie, hlboká orba, urovnanie povrchu pôdy; C - podmietka so zapravením slamy, zelené hnojenie, hlboká orba, urovnanie povrchu pôdy) na jej úrodu a technologickú kvalitu. V priemere odrôd bola najvyššia úroda buliev (65,52 t.ha-1) a úroda polarizačného cukru (10,63 t.ha-1) zistená na variante hospodárenia pôdy B. Najvyššia digescia (16,46 °S) a výťažnosť rafinády (14,27 %) bola dosiahnutá na variante C. V daných pôdno-klimatických podmienkach boli významnejšie hodnoty úrody buliev (64,96 t.ha-1), digescie (16,51 °S), výťažnosti rafinády (14,43 %) a úrody polarizačného cukru (9,93 t.ha-1) zaznamenané pri odrode Zenith.The effect of varieties (Fox, Zenith) and variants of soil tillage have been observed on both the yield and technological quality of sugar beet in the field multi-factorial experiment (A - hay harvest, stubble ploughing, farmyard manuring, mean ploughing, deep ploughing, evening of soil surface; B - hay harvest, stubble ploughing, green manuring, deep ploughing, evening of soil surface; C - stubble ploughing with incorporation of hay, green manuring, deep ploughing, evening of soil surface). The highest root yield (65,52 t.ha-1) and polarised sugar yield (10,63 t.ha-1) was found on the variant B. The most significant digestion (16,46 °S) and refined sugar yield (14,27 %) was reached on variant C. In variety Zenith the highest yield of sugar beet roots (64,96 t.ha-1), digestion (16,51 °S), refined (14,43 %) and polarised sugar yields (9,93 t.ha-1) was found at given soil-climatic conditions

EFFECT OF YEAR AND ATONIK APPLICATION ON THE SELECTED SUGAR BEET PRODUCTION AND QUALITY PARAMETERS

V poľnom pokuse realizovanom v teplej mierne suchej kukuričnej výrobnej oblasti bol sledovaný vplyv poveternostných podmienok ročníka a rôznych dávok rastového stimulátora Atonik (A: 0,6 + 0,6 l.ha-1; B: 0,4 + 0,6 + 0,6 l.ha-1; C: 0,25 + 1,0 + 0,6 l.ha-1) na vybrané parametre úrody a technologickej kvality cukrovej repy (úroda buliev, cukornatosť, výťažnosť rafinády). Formovanie produkčných ukazovateľov cukrovej repy v rokoch 1998 - 2000 vplyvom poveternostných podmienok pestovateľského ročníka a Atoniku bolo štatisticky vysoko preukazné. V priemere najvyššie hodnoty úrody buliev (54,04 t.ha-1), digescie (17,13 °S) a výťažnosti rafinády (14,30 %) boli zistené na variante ošetrenia Atonikom C (0,25 + 1,0 + 0,6 l.ha-1) v roku 1999.In a field trial, realised in a warm, slightly dry, maize growing region, an influence of different rates of Atonik (A: 0,6 + 0,6 l.ha-1; B: 0,4 + 0,6 + 0,6 l.ha-1; C: 0,25 + 1,0 + 0,6 l.ha-1) was observed on some technological and qualitative parameters of sugar beet (root yield, digestion, refined sugar yield). We have found a statistically high significant effect of both the yearly weather conditions and Atonik application on the development of production parameters of sugar beet in 1998 - 2000. In average, the highest values of observed parameters such as yield of sugar beet roots (54,04 t.ha-1), digestion (17,13 °S), refined sugar (14,30 % ) were obtained for Atonik-treated variant C (0,25 + 1,0 + 0,6 l.ha-1) in 1999

On the Number of Synchronizing Colorings of Digraphs

We deal with $k$-out-regular directed multigraphs with loops (called simply \emph{digraphs}). The edges of such a digraph can be colored by elements of some fixed $k$-element set in such a way that outgoing edges of every vertex have different colors. Such a coloring corresponds naturally to an automaton. The road coloring theorem states that every primitive digraph has a synchronizing coloring. In the present paper we study how many synchronizing colorings can exist for a digraph with $n$ vertices. We performed an extensive experimental investigation of digraphs with small number of vertices. This was done by using our dedicated algorithm exhaustively enumerating all small digraphs. We also present a series of digraphs whose fraction of synchronizing colorings is equal to $1-1/k^d$, for every $d \ge 1$ and the number of vertices large enough. On the basis of our results we state several conjectures and open problems. In particular, we conjecture that $1-1/k$ is the smallest possible fraction of synchronizing colorings, except for a single exceptional example on 6 vertices for $k=2$.Comment: CIAA 2015. The final publication is available at http://link.springer.com/chapter/10.1007/978-3-319-22360-5_1

Faster linearizability checking via PP-compositionality

Linearizability is a well-established consistency and correctness criterion for concurrent data types. An important feature of linearizability is Herlihy and Wing's locality principle, which says that a concurrent system is linearizable if and only if all of its constituent parts (so-called objects) are linearizable. This paper presents $P$-compositionality, which generalizes the idea behind the locality principle to operations on the same concurrent data type. We implement $P$-compositionality in a novel linearizability checker. Our experiments with over nine implementations of concurrent sets, including Intel's TBB library, show that our linearizability checker is one order of magnitude faster and/or more space efficient than the state-of-the-art algorithm.Comment: 15 pages, 2 figure

Influence of polysulfone and hemophan hemodialysis membranes on phagocytes.

Abstract. The aim of the study was to compare the effect of hemophane and polysulfone membranes on the phagocyte-derived production of reactive oxygen species (ROS) as well as on neutrophil CD11b and CD62L expression in patients undergoing regular hemodialysis. The effects of hemodialysis membranes were also studied in in vitro conditions after coincubating them with differentiated HL-60 cells. ROS production was measured using chemiluminometric and flow cytometric methods. Expression of CD11b, CD62L and mitochondrial membrane potential were detected by monoclonal antibodies and by the JC-1 fluorescent probe, respectively. Depressed ROS production was observed in patients already before dialysis. Further decrease in ROS production and an increase in CD11b expression were observed especially in patients after hemophan hemodialysis. Decreased ROS production and increased CD11b expression were observed also after incubation of HL-60 cells with hemophan membranes. Mitochondrial membrane potential dropped only after incubating cells with hemophan membranes proving its more serious adverse effects in comparison with the polysulfone membrane. In conclusion, deleterious effects of hemodialysis on the metabolic activity of phagocytes were proved. Combining chemiluminescent and flow cytometric methods for the detection of ROS production and determining mitochondrial membrane potential can be useful tools for the analysis of material biocompatibility. Key words: Hemodialysis -Hemophan -Polysulfone -Reactive oxygen species -CD11b Abbreviations: ROS, reactive oxygen species; DCFH-DA, 2&apos;,7&apos;-dichlorodihydrofluorescein diacetate; HE, hydroethidine; PMA, phorbol myristate acetate; FMLP, N-formyl-L-methionyl-L-leucyl-L-phenylalanine; OZP, zymosan opsonized in human serum; MRF, median of relative fluorescence

Preoperative and perioperative use of levosimendan in cardiac surgery: European expert opinion

In cardiac surgery, postoperative low cardiac output has been shown to correlate with increased rates of organ failure and mortality. Catecholamines have been the standard therapy for many years, although they carry substantial risk for adverse cardiac and systemic effects, and have been reported to be associated with increased mortality. On the other hand, the calcium sensitiser and potassium channel opener levosimendan has been shown to improve cardiac function with no imbalance in oxygen consumption, and to have protective effects in other organs. Numerous clinical trials have indicated favourable cardiac and non-cardiac effects of preoperative and perioperative administration of levosimendan. A panel of 27 experts from 18 countries has now reviewed the literature on the use of levosimendan in on-pump and off-pump coronary artery bypass grafting and in heart valve surgery. This panel discussed the published evidence in these various settings, and agreed to vote on a set of questions related to the cardioprotective effects of levosimendan when administered preoperatively, with the purpose of reaching a consensus on which patients could benefit from the preoperative use of levosimendan and in which kind of procedures, and at which doses and timing should levosimendan be administered. Here, we present a systematic review of the literature to report on the completed and ongoing studies on levosimendan, including the newly commenced LEVO-CTS phase III study (NCT02025621), and on the consensus reached on the recommendations proposed for the use of preoperative levosimendan

Dynamic phase diagram of the REM

By studying the two-time overlap correlation function, we give a comprehensive analysis of the phase diagram of the Random Hopping Dynamics of the Random Energy Model (REM) on time-scales that are exponential in the volume. These results are derived from the convergence properties of the clock process associated to the dynamics and fine properties of the simple random walk in the $n$-dimensional discrete cube.Comment: This paper is in large part based on the unpublished work arXiv:1008.3849. In particular, the analysis of the overlap correlation function is new as well as the study of the high temperature and short time-scale transition line between aging and stationarit

Universality of REM-like aging in mean field spin glasses

Aging has become the paradigm to describe dynamical behavior of glassy systems, and in particular spin glasses. Trap models have been introduced as simple caricatures of effective dynamics of such systems. In this Letter we show that in a wide class of mean field models and on a wide range of time scales, aging occurs precisely as predicted by the REM-like trap model of Bouchaud and Dean. This is the first rigorous result about aging in mean field models except for the REM and the spherical model.Comment: 4 page

Trapping in the random conductance model

We consider random walks on $\Z^d$ among nearest-neighbor random conductances which are i.i.d., positive, bounded uniformly from above but whose support extends all the way to zero. Our focus is on the detailed properties of the paths of the random walk conditioned to return back to the starting point at time $2n$. We show that in the situations when the heat kernel exhibits subdiffusive decay --- which is known to occur in dimensions $d\ge4$ --- the walk gets trapped for a time of order $n$ in a small spatial region. This shows that the strategy used earlier to infer subdiffusive lower bounds on the heat kernel in specific examples is in fact dominant. In addition, we settle a conjecture concerning the worst possible subdiffusive decay in four dimensions.Comment: 21 pages, version to appear in J. Statist. Phy