Structure of Virtual Photons at HERA

Triple differential dijet cross-sections in e p interactions measured with the H1 and ZEUS detectors at HERA are presented. The data are compared to Monte Carlo simulations which differ in their assumptions about photon structure and parton evolution. Effects of the resolved processes of longitudinally polarized virtual photons at HERA are investigated for the first time.Comment: 8 pages, Latex, 2 figures in EPS format, 2 figures in PS forma

Prevalence of antibodies to Encephalitozoon cuniculi in European hares (Lepus europaeus)

[b]Introduction and objectives.[/b][i] Encephalitozoon cuniculi[/i] is an obligate intracellular parasite infecting especially domestic rabbits; however, spontaneous infections have been documented in other mammalian species such as dogs, cats, rabbits, horses, cows and sheep all over the world. Encephalitozoonosis is a chronic and latent disease leading to renal failure, encephalitis, disorders of brain and urinary tract, and may lead to death. There are limited reports on encephalitozoonosis in wildlife, which is why the aim of this study was to detect the prevalence of antibodies to [i]E. cuniculi[/i] in European hares. [b]Materials and methods. [/b]Samples of blood sera from 701 wild hares from the Czech Republic (n = 245), the Slovak Republic (n = 211) and Austria (n = 245) were examined by indirect immunofluorescence antibody test (IFAT); samples with titer ≥ 40 were marked as positive. [b]Results[/b]. The total seroprevalence of E. cuniculi antibodies was 1.42% with titres in the range 40–640. Antibodies to [i]E. cuniculi[/i] were detected in 2.9% (7/245), 0.8% (2/245) and 0.47% (1/211) hares from the Czech Republic, Austria and the Slovak Republic, respectively. [b]Conclusions[/b]. This is the first detection of antibodies to [i]E. cuniculi[/i] in hares from Europe showing that hares could be exposed to[i] E. cuniculi[/i] infection, however with a low rate

Study of the Hot-Spot Temperature During Quench in the Nonplanar Coils of W7-X

The quench protection system of the nonplanar coils of the Wendelstein 7-X stellarator was laid out over 15 years ago. At that time, the assessment of the hot-spot temperature by a basic adiabatic model was done using design values for material and operation parameters. After the operating experience in 2016, the hot-spot temperature is reassessed with the thermal-hydraulic program THEA, using the actual values for delay and dump time. The electrical resistivity of the conduit alloy ismeasured over the whole range of temperatures and in magnetic fields on relevant samples of a conductor, exposed to the hardening heat treatment after winding. The results were fed into THEA. Parametric variations are studied in the calculations, e.g., testing the effect of the quench initiation zone, delay time, and dump resistor. The results suggest that the hot-spot temperature of the conduit in the case of quench is safely within the allowable values even when the dump voltage is reduced compared to the initial design value

Design and R&D for the DEMO Toroidal Field Coils Based on Nb3Sn React and Wind Method

In 2013, the Swiss Plasma Center proposed a Toroidal Field (TF) layout for the DEMO-EUROfusion tokamak, based on a graded winding made of layers of Nb3Sn (react&wind) and NbTi conductors. The R&D effort led in 2015 to a full size prototype conductor tested up to 82.4 kA at 12.35 T. The test continued in 2016 and new results are presented. In summer 2015 a new reference baseline was issued for the DEMO-EUROfusion tokamak, leading to an update of the TF requirements. The design update is presented in this paper, with the winding pack consisting of 12 single layers of Nb3Sn with "invisible" (no protrusion) inter-layer joints. The high grade Nb3Sn react&wind conductor operates at 63.3 kA, 12.23 T with T-cs > 6.5 K. A new prototype conductor is being manufactured. The main advantages of the graded approach, applied to both the superconductor and the stainless s teel conduit, are a substantial space and cost saving compared to the wind&react approach with pancake winding

risk factors involved in transmission of toxoplasma gondii and neospora caninum infection in rabbit farms in northern italy

[b]Introduction and objective.[/b] In Italy, rabbits are frequently reared for meat production. The aim of the study was to find the seroprevalence of [i]T. gondii[/i] and [i]N. caninum[/i] parasites, and risk factors of infection in rabbit farms. [b]Material and methods[/b]. Blood samples from 260 apparently healthy breeding rabbits were collected on 13 commercial farms in Northern Italy. Rabbits were divided into categories according to age, number of births, breed, province and size of farm. Samples were tested for antibodies to [i]T. gondii[/i] and [i]N. caninum[/i] using the indirect fluorescence antibody test (IFAT); samples with a titre ≥ 50 were considered positive. [b]Results.[/b] Antibodies to T. gondii and N. caninum were found in 38 (14.6 %) and 3 (1.2 %) rabbits, respectively. A statistically significant difference (p-value ≤ 0.05) was found only in [i]T. gondii [/i]prevalence among different rabbit breeds and provinces. Conclusion. Rabbits from Northern Italy are at risk of [i]T. gondi[/i]i and [i]N. caninum[/i] infection; however, it is lower compared to seroprevalence noted in other animal species or in humans