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See detailAnalytic dermoscopy of superficial basal cell carcinoma.
FRANCHIMONT, Claudine ULg; Hermanns, Jean-Francois; Caucanas, Marie et al

in Journal of Case Reports in Medicine (2013), 3

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See detailAnalytic Model for The Motion About An Oblate Planet in The Presence Atmospheric Drag
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Advances in The Astronautical Sciences (2015)

The paper introduces a new model for the motion about an oblate planet under the influence of the atmospheric drag. Both qualitative and quantitative insights are revealed, as well as closed-form ... [more ▼]

The paper introduces a new model for the motion about an oblate planet under the influence of the atmospheric drag. Both qualitative and quantitative insights are revealed, as well as closed-form equations of motion. The main tool consists in averaging the effects of both perturbations (oblateness and drag), and deriving the variational equations for the vectorial orbital elements. The model is singularity-free and may serve as an initial guess for control problems, as well as an analytic propagator. [less ▲]

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See detailAnalytic models for the forward scattering amplitude at high energies
Cudell, Jean-René ULg; Kang, K.; Ezhela, V. et al

in Fried, Herb (Ed.) QUANTUM CHROMODYNAMICS (2000)

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See detailAnalytic parametrizations of the non-perturbative pomeron and QCD-inspired models
Nicolescu, B.; Cudell, Jean-René ULg; Ezhela, V. V. et al

in Kundrat, V.; Zavada, P. (Eds.) ELASTIC AND DIFFRACTIVE SCATTERING (2001)

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See detailThe Analytic Pricing of Asymmetric Defaultable Swaps
Hübner, Georges ULg

in Journal of Banking and Finance (2001), 25(2), 295-316

Swaps where both parties are exposed to credit risk still lack convincing pricing mechanisms. This article presents a reduced-form model where the event of default is related to structural characteristics ... [more ▼]

Swaps where both parties are exposed to credit risk still lack convincing pricing mechanisms. This article presents a reduced-form model where the event of default is related to structural characteristics of each party. The cash flows submitted to credit risk are identified before the swap is priced. Analytical pricing formulas for interest rate and currency swaps are computed using a Gaussian model for risky bonds. Currency swaps exhibit additional correlation risk. The benefits from netting depend on the balance between exposures and market conditions in valuation. We show that sources of credit risk asymmetries are also likely to impact on credit spreads. [less ▲]

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See detailAnalytic Propagation for Satellites in Near-Circular Low-Earth Orbits
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference (2014)

The present work is focused on providing an analytic model for the motion of an low-Earth-orbiting satellite. The model incorporates the two dominant perturbations, namely the atmospheric drag and the ... [more ▼]

The present work is focused on providing an analytic model for the motion of an low-Earth-orbiting satellite. The model incorporates the two dominant perturbations, namely the atmospheric drag and the Earth oblateness. While the latter is modeled by the second zonal harmonic J 2 , both constant and exponential density distribution models of the atmosphere are considered. The satellite orbit is assumed to be almost circular. Closed-form equations of motion are obtained, even time-explicit in the case of a constant atmosphere. The analytic predictions are carefully validated against direct numerical simulations. The resulting model is suitable to be incorporated in onboard propagators for short-term orbit predictions. [less ▲]

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See detailAnalytic propagation of near-circular satellite orbits in the atmosphere of an oblate planet
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Celestial Mechanics and Dynamical Astronomy (2015), 123(1), 85-103

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See detailAnalytic properties of different unitarization schemes
Selyugin, O. V.; Cudell, Jean-René ULg; Predazzi, E.

in Eur. Phys. J. ST (2008), 162

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See detailAnalytic properties of unitarization schemes
Selyugin, Oleg Viktorovich; Cudell, Jean-René ULg

in Czechoslovak Journal of Physics (2006)

The analytic properties of the elastic hadron scattering amplitude are examined in the impact parameter representation at high energies. Different unitarization procedures and the corresponding non-linear ... [more ▼]

The analytic properties of the elastic hadron scattering amplitude are examined in the impact parameter representation at high energies. Different unitarization procedures and the corresponding non-linear equations are presented. Several unitarisation schemes are presented. They lead to almost identical results at the LHC. [less ▲]

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See detailAnalytic Quantification of Phototype-Related Regional Skin Complexion
Hermanns, Jean-François ULg; Petit, L.; Hermanns-Lê, Trinh ULg et al

in Skin Research & Technology (2001), 7(3), 168-71

BACKGROUND/AIMS: Narrow-band spectrophotometry that yields melanin (M) and erythema (E) indexes is a convenient method for assessing skin colour. The objective of the study was to assess the phenotype ... [more ▼]

BACKGROUND/AIMS: Narrow-band spectrophotometry that yields melanin (M) and erythema (E) indexes is a convenient method for assessing skin colour. The objective of the study was to assess the phenotype-associated body site differences in skin complexion. METHOD: The Mexameter MX16 was used to record the skin colour in 137 subjects. Evaluations were made on the inner arm, volar forearm, dorsal forearm and forehead. RESULTS: The inner arm and volar forearm had similar values for each of the colorimetric values. The dorsal forearm exhibited the highest M values, and the forehead had the highest E values. Significant positive linear correlations were found between M values from the distinct body sites. The E values showed a correlation only between the inner arm and the volar forearm. CONCLUSION: Regional skin colour differences are obvious. Sun-exposed skin does not react in the same way on the forearm and forehead. Regional variations in M can be predicted from the innate M value. In contrast, the regional variability in E is highly variable among subjects. [less ▲]

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See detailAnalytic quantification of solar lentigines lightening by a 2% hydroquinone-cyclodextrin formulation.
Petit, Ludivine; Pierard, Gérald ULg

in Journal of the European Academy of Dermatology & Venereology (2003), 17(5), 546-9

BACKGROUND: The innate melanin pigmentation of skin is modulated during lifetime by a series of factors, including ageing and chronic ultraviolet light exposure. Actinic lentigines may be of particular ... [more ▼]

BACKGROUND: The innate melanin pigmentation of skin is modulated during lifetime by a series of factors, including ageing and chronic ultraviolet light exposure. Actinic lentigines may be of particular concern from a cosmetic point of view. Conventional hypopigmenting agents are usually deceptive. Using cyclodextrins to form inclusion compounds with these agents might represent a more active drug delivery system. OBJECTIVE: To assess sensitive and objective methods predicting the effects of a 2% hydroquinone-cyclodextrin formulation on solar lentigines. STUDY DESIGN: Thirty Asian adults applied a 2% hydroquinone-cyclodextrin formulation once daily on solar lentigines of a forearm for 2 months. The other untreated forearm served as a control. Monthly assessments were performed using skin colorimetry and fluorescence video recording combined with image analysis. Corneomelametry following photodensitometry of cyanoacrylate skin surface strippings was performed after melanin staining of the samples. RESULTS: The control untreated solar lentigines showed no significant variations in the biometrological parameters. By contrast, the test formulation induced lightening of the solar lentigines. Corneomelametry disclosed improvement after 1 months' treatment, whereas the other assessments only reached significance after 2 months. CONCLUSIONS: A 2% hydroquinone-cyclodextrin formulation proved to be effective in lightening actinic lentigines. Corneomelametry predicted the effects discernible at a later stage by in vivo colour assessments of the melanin content. [less ▲]

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See detailAnalytic Solution for Fuel-Optimal Reconfiguration in Relative Motion
Cho, Hancheol ULg; Park, Sang-Young

in Journal of Optimization Theory & Applications (2009), 141(3), 495-512

The current paper presents simple and general analytic solutions to the optimal reconfiguration of multiple satellites governed by a variety of linear dynamic equations. The calculus of variations is used ... [more ▼]

The current paper presents simple and general analytic solutions to the optimal reconfiguration of multiple satellites governed by a variety of linear dynamic equations. The calculus of variations is used to analytically find optimal trajectories and controls. Unlike what has been determined from previous research, the inverse of the fundamental matrix associated with the dynamic equations is not required for the general solution in the current study if a basic feature in the state equations is met. This feature is very common due to the fact that most relative motion equations are represented in the LVLH frame. The method suggested not only reduces the amount of calculations required, but also allows predicting the explicit form of optimal solutions in advance without having to solve the problem. It is illustrated that the optimal thrust vector is a function of the fundamental matrix of the given state equations, and other quantities, such as the cost function and the state vector during the reconfiguration, can be concisely represented as well. The analytic solutions developed in the current paper can be applied to most reconfiguration problems in linearized relative motions. Numerical simulations confirm the brevity and accuracy of the general analytic solutions developed in the current paper. [less ▲]

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See detailAnalytic solution for the relative motion of satellites in near-circular low-Earth orbits
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Proceedings of the AAS/AIAA Space FLight Mechanics Meeting (2015)

The paper presents the solution to the problem of the relative motion between two satellites orbiting Earth under the influence of the oblateness and atmospheric drag perturbations. Starting from the ... [more ▼]

The paper presents the solution to the problem of the relative motion between two satellites orbiting Earth under the influence of the oblateness and atmospheric drag perturbations. Starting from the analytic solution to the problem of the absolute motion, the closed-form equations of motion are obtained. No simplifying assumptions are made on the relative dynamics. [less ▲]

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See detailAnalytic Solution to Optimal Reconfigurations of Satellite Formation Flying in Circular Orbit under J2 Perturbation
Cho, Hancheol ULg; Park, Sang-Young; Park, Han-Earl et al

in IEEE Transactions on Aerospace & Electronic Systems (2012), 48(3), 2180-2197

This paper presents an analytic solution to the optimal reconfiguration problem of satellite formation flying in J2 orbital perturbation. Continuous and variable low-thrust accelerations are represented ... [more ▼]

This paper presents an analytic solution to the optimal reconfiguration problem of satellite formation flying in J2 orbital perturbation. Continuous and variable low-thrust accelerations are represented by the Fourier series, and initial and final boundary conditions are used to establish the constraints on the thrust functions. The thrust functions are implemented by optimal Fourier coefficients that minimize the cost during the maneuver. The analytic solution composed of these Fourier coefficients are simply represented in a closed form, and no approximation is needed. Numerical simulations are conducted to visualize and compare the results obtained in this paper with those of previous papers with no perturbations. The analytic solution developed in this paper is more accurate in that the general behavior of the optimal control history and reconfiguration trajectories are easily calculated even in the presence of the J2 potential disturbance. The analytic solution is useful for designing a reconfiguration controller for satellite formation flying under J2 orbital perturbation. [less ▲]

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See detailAnalytic solution to the relative orbital motion around an oblate planet
Condurache, D.; Martinusi, Vladimir ULg

in AIAA Guidance, Navigation, and Control Conference and Exhibit (2009)

The paper offers a vectorial approach to the J2-perturbed relative orbital motion. The model uses mean orbital elements in order to derive closed form expressions for the relative position and relative ... [more ▼]

The paper offers a vectorial approach to the J2-perturbed relative orbital motion. The model uses mean orbital elements in order to derive closed form expressions for the relative position and relative velocity with respect to the LVLH frame attached on a main satellite. The advantage of the present approach is that only the motion of one satellite must be known, together with the initial conditions with respect to LVLH of the other satellites. As in the previous works of the authors, a tensorial instrument is used in order to transfer the motion from inertial to non-inertial reference frames and back. In this way, a concise instrument for the study of the satellites formations under the influence of the oblateness factor J2 is offered. Copyright © 2009 by Daniel Condurache and Vladimir Martinusi. [less ▲]

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See detailAnalytic Support for Managing New Industrial Products
Choffray, Jean-Marie ULg; Lilien, Gary L.

in CERESSEC Working Paper, Groupe ESSEC, Paris France (1984)

In this paper, we review some analytical tools to aid in the design of a new industrial product and in the management of sales growth. Our approach blends product design optimization with diffusion ... [more ▼]

In this paper, we review some analytical tools to aid in the design of a new industrial product and in the management of sales growth. Our approach blends product design optimization with diffusion analysis to assess a new product's market potential and to plan market entry strategy. [less ▲]

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See detailAnalytical and clinical evaluation of automated immunoassays for serum CK-MB and myoglobin using the OPUS MAGNUM analyser
Chapelle, Jean-Paul ULg; Spronck, Thierry; Ferir, Anne-Marie

in Clinical Chemistry (1995), 41

Detailed reference viewed: 8 (0 ULg)