Now showing items 16-20 of 6106

    • A Review of Generalized Linear Latent Variable Models and Related Computational Approaches 

      Korhonen, Pekka; Nordhausen, Klaus; Taskinen, Sara (Wiley, 2024)
      Generalized linear latent variable models (GLLVMs) have become mainstream models in this analysis of correlated, m-dimensional data. GLLVMs can be seen as a reduced-rank version of generalized linear mixed models (GLMMs) ...
    • Spatial resolution of dijet photoproduction in near-encounter ultraperipheral nuclear collisions 

      Eskola, Kari J.; Guzey, Vadim; Helenius, Ilkka; Paakkinen, Petja; Paukkunen, Hannu (American Physical Society (APS), 2024)
      We present next-to-leading order perturbative QCD predictions for inclusive dijet photoproduction in ultraperipheral nucleus-nucleus collisions (UPCs) within the impact-parameter dependent equivalent photon approximation. ...
    • Effects of Bending on Raman-active Vibration Modes of Carbon Nanotubes 

      Malola, Sami; Häkkinen, Hannu; Koskinen, Pekka (2008)
      We investigate vibration modes and their Raman activity of single-walled carbon nanotubes that are bent within their intrinsic elastic limits. By implementing novel boundary conditions for density-functional based ...
    • The Asymptotic Properties of the One-Sample Spatial Rank Methods 

      Möttönen, Jyrki; Nordhausen, Klaus; Oja, Hannu; Radojicic, Una (Springer Nature Switzerland, 2024)
      For a set of p-variate data points y1,…,yn, there are several versions of multivariate median and related multivariate sign test proposed and studied in the literature. In this paper we consider the asymptotic properties ...
    • Self-passivating reconstructions of graphene edges 

      Koskinen, Pekka; Malola, Sami; Häkkinen, Hannu (American Physical Society, 2008)
      Planar reconstruction patterns at the zigzag and armchair edges of graphene were investigated with density-functional theory. It was unexpectedly found that the zigzag edge is metastable and a planar reconstruction ...