Seismic interferometry has become a technology of growing interest for imaging from borehole seismic data. We demonstrate that interferometry of internal multiples can be used to image targets above a borehole receiver array. We use an interferometry technique that targets the reconstruction of specific primary reflections from multiply reflected waves. In this target-oriented interferometry ap...

A 53-year-old patient with chronic hepatitis C virus infection was referred because of the presence of multiples ultrasonographic images simulating liver metastasis. Physical examination was normal. Liver function test showed increased levels of aminotransferases, high levels of γ-glutamyltransferase and normal alkaline phosphatase. Liver ultrasound identified multiples nodules that measured 0....

For integers g ≥ 2, k ≥ 2, call a number N a (g, k)-reverse multiple if the reversal of N in base g is equal to k times N . The numbers 1089 and 2178 are the two smallest (10, k)reverse multiples, their reversals being 9801 = 9 · 1089 and 8712 = 4 · 2178. In 1992, A. L. Young introduced certain trees in order to study the problem of finding all (g, k)-reverse multiples. By using modified versio...

Seismic interferometry recovers the Green's function between two receivers by cross-correlating the field measured from sources that surround the receivers. In the seismic literature, it has been widely reported that this processing can produce artifacts in the Green's function estimate called "spurious multiples" or the "virtual refracted wave." The spurious multiples are attributed to the hea...

where U = {1, 2, . . . , n}. Example. Suppose we ask how many integers less than 120 are relatively prime to it. Since 120 has prime factors 2, 3, and 5, any number that is relatively prime to it is not a multiple of any of these. We can solve this using the Inclusion-Exclusion Principle as follows. Let A = {1, 2, . . . , 120}, the set of integers from 1 to 120. Let S1 be the multiples of 2 in ...

Les auteurs rapportent chez deux nourrissons, l'etude anatomo-clinique d'un cas de kystes alveolaires multiples,et d'un cas d'emphyseme lobaire congenital bilateral.Le troisieme cas concerne un kyste bronchog6nique du poumon gauche,decouvert a l'autopsie d'un nouveau-ne. Dans le quatrieme cas,un emphyseme geant du lobe superieur gauche,decouvert dans un contexte infectieux,a l'age de neuf mois,...

Algebraic attacks have received a lot of attention in studying security of symmetric ciphers. The function used in a symmetric cipher should have high algebraic immunity (AI) to resist algebraic attacks. In this paper we are interested in finding AI of Boolean power functions. We give an upper bound on the AI of any Boolean power function and a formula to find its corresponding low degree multi...

The action to grasp an object by a human hand comprises not only an eye-hand coordination, but also a motion process that controls and plans the movement for grasping objects. To understand this behavior, it is necessary to study eye and hand movements simultaneously. A novel approach to understand the user’s intentions with computer vision technics is proposed in this paper. Our solution perfo...

Multiple attenuation in complex geology remains a very intensive research area. The proposed technique aims to use the spatial predictability of both the signal (primaries) and noise (multiples) in order to perform the multiple attenuation in the time domain. The spatial predictability is estimated with multidimensional prediction-error filters. These filters are time-variant in order to handle...

The advances in reproductive technologies have changed the demographics of multifetal pregnancies. In the first trimester, ultrasound allows to diagnose the number of multiples, chorionicity and amnionicity, the presence or absence of nuchal translucency, early growth discordance, severe malformations and the origin of activities and contacts between multiples. In the second and third trimester...