Search results for "IFT"

Baryon Acoustic Oscillations in LRGs

2012

Baryon Acoustic Oscillations (BAO) have been previously detected using correlation functions and power spectra of the galaxy distribution. In this work, we present a new method for the detection of the real-space structures associated with this feature. These baryon acoustic structures are spherical shells with a relatively small density contrast, surrounding high density central regions. We design a specific wavelet adapted to the search for shells, and exploit the physics of the process by making use of two different mass tracers, introducing a specific statistic to detect the BAO features. We apply our method to the detection of BAO in a galaxy sample drawn from the Sloan Digital Sky Sur…

REFLEX galaxies redshifts

2009

We present the final data from the spectroscopic survey of the ROSAT-ESO Flux-Limited X-ray (REFLEX) catalogue of galaxy clusters. The REFLEX survey covers 4.24 steradians (34% of the entire sky) below a declination +2.50{deg} and at high galactic latitude (|b|<20{deg}). The full survey includes 447 galaxy clusters with a median redshift of 0.08 and is better than 90% complete to a limiting flux of f_X_=3x10^-12^ergs/s/cm^2^ (3fW/m^2^, 0.1 to 2.4keV), representing the largest statistically homogeneous sample of clusters to date drawn from the ROSAT All-Sky Survey (RASS). Here we describe the details of the spectroscopic observations carried out at the ESO 1.5m, 2.2m and 3.6m telescopes, the…

A probabilistic long‐term framework for site‐specific erosion analysis of wind turbine blades: A case study of 31 Dutch sites

2021

Abstract Rain‐induced leading‐edge erosion (LEE) of wind turbine blades (WTBs) is associated with high repair and maintenance costs. The effects of LEE can be triggered in less than 1 to 2 years for some wind turbine sites, whereas it may take several years for others. In addition, the growth of erosion may also differ for different blades and turbines operating at the same site. Hence, LEE is a site‐ and turbine‐specific problem. In this paper, we propose a probabilistic long‐term framework for assessing site‐specific lifetime of a WTB coating system. Case studies are presented for 1.5 and 10 MW wind turbines, where geographic bubble charts for the leading‐edge lifetime and number of repai…

The use of different style variants and style shifting and their functions in the speech of an EFL teacher

2008

Measurement of nonlinear and chromatic dispersion parameters of optical fibers using modulation instability

2006

International audience; We present a simple method for the measurement of Kerr, second- and third-order dispersion coefficients in optical fibers using power and dispersion dependences of modulation instability near the zero-dispersion wavelength. We also complete the analysis by the accurate determination of the zero-dispersion wavelength of the fiber using the phase-matched four wave mixing process which occurs near this specific wavelength.

Simultaneous polarization attraction and Raman amplification of a light beam in optical fibers

2012

International audience; In this paper, we demonstrate that it is possible to combine both Raman amplification and polarization attraction of a signal wave in a single optical fiber by means of a counterpropagating scheme. Experiments were performed near 1550 nm in a continuous wave regime and by means of a 10 Gbit ∕ s return-to-zero signal injected in a 20 kmlong low polarization mode dispersion optical fiber. Complete repolarization and 6.7 dB amplification of the signal wave was achieved by injecting a 850 mW, 1480 nm counterpropagating polarized pump wave.

Organy na Śląsku Opolskim na łamach „Zeitschrift für Instrumentenbau”

2021

Periodicals remain a valuable source of information about the history of Silesian organ building. Particularly from the nineteenth century on, numerous publications appeared in the general press that were dedicated to music and the various manifestations of musical life including issues from the field of instrumentology. Professional periodicals dealing with this topic also started to appear. The periodical “Zeitschrift für Instrumentenbau”, which was founded by Paul de Wit in 1880 and appeared until 1943, certainly belonged to this group of publications. It devoted much space to the issues of organ building. Starting from the thirteenth year of publication, it included even a permanent sec…

Optimization of the JUNO liquid scintillator composition using a Daya Bay antineutrino detector

2021

To maximize the light yield of the liquid scintillator (LS) for the Jiangmen Underground Neutrino Observatory (JUNO), a 20 t LS sample was produced in a pilot plant at Daya Bay. The optical properties of the new LS in various compositions were studied by replacing the gadolinium-loaded LS in one antineutrino detector. The concentrations of the fluor, PPO, and the wavelength shifter, bis-MSB, were increased in 12 steps from 0.5 g/L and &lt;0.01 mg/L to 4 g/L and 13 mg/L, respectively. The numbers of total detected photoelectrons suggest that, with the optically purified solvent, the bis-MSB concentration does not need to be more than 4 mg/L. To bridge the one order of magnitude in the detect…

Sylloge diplomatum Livoniam illustrantium

1817

Saturā/Im Inhalt: Tomus primus Sectio prima [1225- 1763], Bl.1- 173. Sectio secunda [1224- 1560]; Bl..174-277; Glossarium über die in diesem Werk vorkommene Wörter: Bl. [1a-8b]; Heraldica[: syst.-chronolog. Register]- Bl. [9a-22b]; Register der in diesem Werke vorkommenden Urkunden [chronolog.]- Bl.[23a-31a]. Tomus secundus Sectio prima: Bl.[1-2], 1-165b; Sectio secunda: Bl. 166-311b; Glossarium über die in diesem zweiten Tome vorkommenden Wörter: Bl. [312-328]; Heraldica : [Register]: Bl. 328b-330a, 331b-332b; Verzeichniss der hier vorkom[m]enden Urkunden [chronologisch angeordnet]: Bl.[333-336]. Materiālam pievienots Word.doc rokraksta apraksts un raksturojums.

IL PADRE E LA COSTRUZIONE DI UNA NUOVA IDENTITÀ GENITORIALE NELL’ITALIA DEGLI ANNI CINQUANTA

2016

La società tardo-moderna viene considerata una società senza padri: da un lato si denuncia la morte o l’eclisse del padre, dall’altro lato si auspica un suo ritorno. Prendendo l’avvio dalla contemporaneità, l’articolo analizza la fine della paternità come un fenomeno di lunga durata che riguarda la crisi del codice paterno autoritario e ne ricerca le radici nel piano della ricerca storica soffermandosi sull’Italia degli anni Cinquanta. Attraverso fonti audiovisive e letterarie viene ricostruita un’identità paterna che non sembra corrispondere a quella maggiormente diffusa nell’immaginario collettivo: essa non appare rassicurante, decisa, autoritaria, ma fragile, ambigua e da decifrare. Si t…