Various puzzles, quizzes, games, humorous definitions, or mathematical that should engage the interest of readers.

A currently successful approach to computational semantics is to represent words as embeddings in a machine-learned vector space. We present an ensemble method that combines embeddings produced by GloVe (Pennington et al., 2014) and word2vec (Mikolov et al., 2013) with structured knowledge from the semantic networks ConceptNet (Speer and Havasi, 2012) and PPDB (Ganitkevitch et al., 2013), mergi...

This paper presents some aspects of the first Portuguese frequency lexicon extracted from a corpus of large dimensions. The Multifunctional Computational Lexicon of Contemporary Portuguese (henceforth MCL) rised from the necessity of filling a gap existent in the studies of the contemporary Portuguese. Until recently, the frequency lexicons of Portuguese were of very small dimensions, such as P...

Variable-length codes (VLCs) are generally employed to improve compression efficiency using data statistics. However, VLCs are weak to bit errors in noisy transmission environments such as wireless channel. Recently, reversible variable-length codes (RVLCs) have been introduced due to their capability of recovering information from corrupted compressed streams; hence, enhancing the robustness o...

Peggy Koopman-Boyden is currently Senior Fellow in Social Gerontology at the National Institute of Demographic and Economic Analysis at the University of Waikato, working on research programmes related to ageing. Sheena Moosa is a PhD student. the motivations of older New Zealanders (aged 65 and over) who live alone, and the strategies they adopt to make their solo lifestyle meaningful. Living ...

Rare words are usually better recognized than common words, a finding in recognition memory known as the word-frequency effect. Some theories predict the word-frequency effect because they assume that rare words consist of more distinctive features than do common words (e.g., Shiffrin & Steyvers's, 1997, REM theory). In this study, recognition memory was tested for words that vary in the common...

A reversible variable-length code (RVLC) is a code in which the bit stream formed by a portion of a codeword, or by the overlapped portion of two or more adjacent codewords, is not a valid codeword. A self-synchronizing RVLC allows for a sequence of codewords to be decoded either backwards or forwards without any external synchronization. In this article, we present an algorithm for constructin...

A conflict-avoiding code (CAC) of length n and weight k is a collection of binary vectors of length n and Hamming weight k, such that the inner product of any two vectors or their arbitrary cyclic shifts is at most one. In the study of multiple-access collision channel without feedback, CAC is used to guarantee that each transmitting user can send at least one data packet successfully during a ...

A conflict-avoiding code (CAC) C of length n with weight k is a family of binary sequences of length n and weight k satisfying ∑ 0≤t≤n−1 xitxj,t+s ≤ 1 for any distinct codewords xi = (xi0, xi1, . . . , xi,n−1) and xj = (xj0, xj1, . . . , xj,n−1) in C and for any integer s, where the subscripts are taken modulo n. A CAC with maximal code size for given n and k is said to be optimal. A CAC has be...