36 research outputs found
Platform and environment requirements of a satellite quantum test of the Weak Equivalence Principle at the level
The Space Time Explorer and QUantum Equivalence principle Space Test
(STE-QUEST) recently proposed, aims at performing a precision test of the weak
equivalence principle (WEP), a fundamental cornerstone of General Relativity.
Taking advantage of the ideal operation conditions for high-precision quantum
sensing on board of a satellite, it aims to detect possible violations of WEP
down to the level. This level of performance leads to stringent
environmental requirements on the control of the spacecraft. We assume an
operation of a dual-species atom interferometer of rubidium and potassium
isotopes in a double-diffraction configuration and derive the constraints to
achieve an E\"otv\"os parameter in statistical and systematic
uncertainties. We show that technical heritage of previous satellite missions,
such as MICROSCOPE, satisfies the platform requirements to achieve the proposed
objectives underlying the technical readiness of the STE-QUEST mission
proposal.Comment: 18 pages, 6 figure
A note on the impact of the internal organization on the accuracy of the information transmitted within the firm
We investigate the incentives sales managers have to transmit information on demand conditions to headquarters under different organizational structures, and its subsequent impact on firm performance. When headquarters chooses quantities, their interests are aligned and reliable information is transmitted. When the choice of quantities is delegated to the sales manager, instead, he prefers not to transmit reliable information and as a consequence, headquarters set transfer prices having poor information about demand. We then see that, due to this difference in the quality of the information available to headquarters, the centralized organization frequently has the best performance
Optimal Precision of Accounting Information in Debt Financing
This paper studies qualitative characteristics of accounting systems that are used in debt financing. We consider a financially constrained firm that provides to lenders information on the value of assets that serve as collateral in a financing contract for a risky investment project. We find that the investor prefers an accounting system that provides biased signals about the value of assets. This bias adjusts the information content of the signals to maximize the probability of undertaking the project. Under fair value accounting, low book values are more precise measures of actual value than high book values, which is consistent with conditional conservatism. Next, we study accounting risk to study the effect of institutions that govern the financial reporting policy based on the optimal precision. We find that fair value measurement introduces greater accounting risk and is preferred by financially constrained firms to measurement at historical cost.
Platform and environment requirements of a satellite quantum test of the Weak Equivalence Principle at the level
International audienceThe Space Time Explorer and QUantum Equivalence principle Space Test (STE-QUEST) recently proposed, aims at performing a precision test of the weak equivalence principle (WEP), a fundamental cornerstone of General Relativity. Taking advantage of the ideal operation conditions for high-precision quantum sensing on board of a satellite, it aims to detect possible violations of WEP down to the level. This level of performance leads to stringent environmental requirements on the control of the spacecraft. We assume an operation of a dual-species atom interferometer of rubidium and potassium isotopes in a double-diffraction configuration and derive the constraints to achieve an Eötvös parameter in statistical and systematic uncertainties. We show that technical heritage of previous satellite missions, such as MICROSCOPE, satisfies the platform requirements to achieve the proposed objectives underlying the technical readiness of the STE-QUEST mission proposal
Platform and environment requirements of a satellite quantum test of the Weak Equivalence Principle at the level
International audienceThe Space Time Explorer and QUantum Equivalence principle Space Test (STE-QUEST) recently proposed, aims at performing a precision test of the weak equivalence principle (WEP), a fundamental cornerstone of General Relativity. Taking advantage of the ideal operation conditions for high-precision quantum sensing on board of a satellite, it aims to detect possible violations of WEP down to the level. This level of performance leads to stringent environmental requirements on the control of the spacecraft. We assume an operation of a dual-species atom interferometer of rubidium and potassium isotopes in a double-diffraction configuration and derive the constraints to achieve an Eötvös parameter in statistical and systematic uncertainties. We show that technical heritage of previous satellite missions, such as MICROSCOPE, satisfies the platform requirements to achieve the proposed objectives underlying the technical readiness of the STE-QUEST mission proposal