Leonid B. Pekelis

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OBJECTIVES The goal of the current study is to investigate the role of adjuvant radiation therapy (adjuvant RT) in minor salivary gland tumors (mSGT) using an established national database. METHODS The Surveillance, Epidemiology, and End Results (SEER) database was used to identify patients treated with or without adjuvant RT for mSGT from 1988 to 2008.(More)
This paper describes how scholars in Chinese Interpreting Studies (CIS) interact with each other and form discrete circles of influence. It also discusses what it means to be an influential scholar in the community, and the relationship between an author's choice of research topic and his academic influence. The study examines an all-but-exhaustive(More)
Figure 1: A series of snapshot renders from importance sampling our hair reflectance functions. Our model supports efficient and seamless rendering of fibers with elliptical cross section. This is key to producing time-homogeneous, realistic caustics. We produced these images by rotating an outdoor IBL gathered in midday, and using a ray tracer with(More)
This paper tests whether or not gains to monetary policy coordination exist in the New Keynesian two country model proposed in Clarida, Gali and Gertler (2002). Major innovations include rigorous numerical analysis that takes advantage of recent techniques proposed by Laffargue (1990) and Klein (2000) and an attention to robustness analysis as advocated by(More)
Attempts are made to employ persistent homology to infer topological properties of point cloud data. Two potential approaches are introducted and briefly evaluated, both relying on Monte Carlo estimation and the program PLEX [9]. First, homology signatures are compared to a null distribution that exhibits complete spatial randomness. This can be regarded as(More)
Figure 1: Three of the 8 scene geometries analyzed to estimate IE ⇢-expectation over pixel space. The rest are shown in figure 4. 1 Abstract Importance sampling methods for ray tracing are numerous. One reason is due to the lack of a robust, quantitative method for comparison. This tech memo takes strides to provide a framework for comparing sampling(More)
Over the five decades since its beginnings, Chinese Interpreting Studies (CIS) has evolved into a dynamic field of academic enquiry with more than 3,500 scholars and 4,200 publications. Using quantitative and qualitative analysis, this scientometric study delves deep into CIS citation data to examine some of the noteworthy trends and patterns of behavior in(More)
The results of [3] suggest a way to sort which barcode intervals correctly belong to the underlying manifold, M , and which can be regarded as topological noise. In particular, when barcodes are computed using sublevel sets of their distance function (see eq 12), all of the barcodes that start later than a linear function of W2(F̂n, F ) can be assumed to(More)
This paper presents statistical approaches to testing whether data are spherical in the topological sense, ie, they lie on a closed manifold with a hollow interior. We characterize the sphere by it’s Betti numbers and use the computational topology program PLEX [12] based on simplicial complexes to calculate the data’s Betti numbers. We use the parametric(More)
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