Search results for " timing"
showing 10 items of 87 documents
Measuring the spin up of the Accreting Millisecond Pulsar XTE J1751-305
2007
We perform a timing analysis on RXTE data of the accreting millisecond pulsar XTE J1751-305 observed during the April 2002 outburst. After having corrected for Doppler effects on the pulse phases due to the orbital motion of the source, we performed a timing analysis on the phase delays, which gives, for the first time for this source, an estimate of the average spin frequency derivative = (3.7 +/- 1.0)E-13 Hz/s. We discuss the torque resulting from the spin-up of the neutron star deriving a dynamical estimate of the mass accretion rate and comparing it with the one obtained from X-ray flux. Constraints on the distance to the source are discussed, leading to a lower limit of \sim 6.7 kpc.
The positioning system of the ANTARES Neutrino Telescope
2012
The ANTARES neutrino telescope, located 40km off the coast of Toulon in the Mediterranean Sea at a mooring depth of about 2475m, consists of twelve detection lines equipped typically with 25 storeys. Every storey carries three optical modules that detect Cherenkov light induced by charged secondary particles (typically muons) coming from neutrino interactions. As these lines are flexible structures fixed to the sea bed and held taut by a buoy, sea currents cause the lines to move and the storeys to rotate. The knowledge of the position of the optical modules with a precision better than 10cm is essential for a good reconstruction of particle tracks. In this paper the ANTARES positioning sys…
Exploring the Interaction Effects of Gender Contentedness and Pubertal Timing on Adolescent Longitudinal Psychological and Behavioral Health Outcomes
2021
Background: Off-time pubertal timing (PT) and non-conforming gender identity have been reported to predict adverse health and well-being in adolescents. However, the joint effects of these two factors are less addressed. We aimed to investigate the main and interaction effects of gender identity, proxied by perceived gender contentedness (GC), and PT on longitudinal adolescent psychological and behavioral outcomes.Methods: Data (N = 1806, Mage = 13.3 ± 0.5 years) come from the Taiwan Youth Project, which prospectively followed a longitudinal cohort of Taiwanese junior high school students from 2000 (wave 1) to 2009 (wave 9). GC was self-reported at waves 1 and 9 in a binary response, and th…
R&D alliances timing under uncertainty: from theory toward experiments
2015
There is a growing awareness that managers have cognitive biases when making investments decisions under uncertainty. There is evidence of deviation from the predictions derived using normative models, such as real options models. The proposed research sheds light on the importance of integrating normative models with experimental methods in order to predict and explain such cognitive limitations. To this aim, starting from a real options model dealing with alliance timing decisions, we propose a simple design of an experiment, that can been used to test some of the fundamental insights of real options theory in the context of R&D alliances.
The relationship between motor timing, reaction time and academic achievements in primary school children.
2017
Aim: Recent studies have reported a correlation between motor skills and school performance, which is different according to the type of motor ability or academic subject examined (Fernandes et al, 2016; Bellafiore et al., 2016). The aim of this study was to analyze the relationship between motor timing, reaction time and achievements in mathematics and Italian in sedentary and active children. Methods: Seventy-eight children (8.55±1.43 years old, 28.93±5.74 kg weight, 126.54±4.74 cm height and 19.30±2.62 kg/m2 BMI) were randomly recruited by a primary school of Palermo, 68% of them practiced a sport outside the academic hours. The motor timing was measured with the finger and foot tapping …
Market Timing with a Robust Moving Average
2015
In this paper we entertain a method of finding the most robust moving average weighting scheme to use for the purpose of timing the market. Robustness of a weighting scheme is defined its ability to generate sustainable performance under all possible market scenarios regardless of the size of the averaging window. The method is illustrated using the long-run historical data on the Standard and Poor's Composite stock price index. We find the most robust moving average weighting scheme, demonstrates its advantages, and discuss its practical implementation.
The Large Area Detector onboard the eXTP mission
2022
The Large Area Detector (LAD) is the high-throughput, spectral-timing instrument onboard the eXTP mission, a flagship mission of the Chinese Academy of Sciences and the China National Space Administration, with a large European participation coordinated by Italy and Spain. The eXTP mission is currently performing its phase B study, with a target launch at the end-2027. The eXTP scientific payload includes four instruments (SFA, PFA, LAD and WFM) offering unprecedented simultaneous wide-band X-ray timing and polarimetry sensitivity. The LAD instrument is based on the design originally proposed for the LOFT mission. It envisages a deployed 3.2 m2 effective area in the 2-30 keV energy range, a…
Modulate research effort in inbound alliance
2014
We address the R&D supply chain where a customer wants to sign an R&D contract with a supplier in an inbound open innovation style. Supplier has to decide how much effort put on contract: effort is assumed as nonobservable then it cannot be constrained contractually. We model the R&D process like a staged one, which allows for both an early contract and a late one. The overall committed effort depends on the alliance timing: earlier contracts will ask for a greater cumulated effort although they offer risk-sharing opportunity. On the other hand, later contracts see supplier with a stronger ex-ante bargaining power position, due to shorter (and then less risky) contract length and experience…
The Large Area Detector onboard the eXTP mission
2018
The eXTP (enhanced X-ray Timing and Polarimetry) mission is a major project of the Chinese Academy of Sciences (CAS) and China National Space Administration (CNSA) currently performing an extended phase A study and proposed for a launch by 2025 in a low-earth orbit. The eXTP scientific payload envisages a suite of instruments (Spectroscopy Focusing Array, Polarimetry Focusing Array, Large Area Detector and Wide Field Monitor) offering unprecedented simultaneous wide-band X-ray spectral, timing and polarimetry sensitivity. A large European consortium is contributing to the eXTP study and it is expected to provide key hardware elements, including a Large Area Detector (LAD). The LAD instrumen…
Timing the US Stock Market Using Moving Averages and Momentum Rules: An Extensive Study
2017
Master's thesis Business Administration BE501 - University of Agder 2017 In this thesis we investigate the performance of moving average and momentum strategies by simulating returns, both in-sample and out-of-sample, while simultaneously taking into account important market frictions. We do so for two stock indices and four stock portfolios, at daily and monthly frequency, in the period from 1928 to 2015. This is carried out in order to examine if the active strategies outperform the passive benchmark on a risk-adjusted basis, and to see if the trading rules pro table when tested in-sample also are pro table out-of-sample. In addition, and for the rst time, we examine the relevance of data…