Topical reviews:Editors' Note

A Note on Topical N-grams

Most of the popular topic models (such as Latent Dirichlet Allocation) have an underlying assumption: bag of words. However, text is indeed a sequence of discrete word tokens, and without considering the order of words (in another word, the nearby context where a word is located), the accurate meaning of language cannot be exactly captured by word co-occurrences only. In this sense, collocation...

Note from the Editor-in-Chief on Topical Sections

After its major overhaul in January 2007, ACS – “Advances in Complex Systems” (http://www.worldscinet.com/acs/) – has grown considerably, both in number of submissions and in scientific recognition. As a consequence of this, the publication schedule of ACS has changed from a quarterly to a bi-monthly journal since 2008, to also allow for a shorter publication time. Starting with this issue, we ...

Application Note 209: Determination of Fluoride in Acidulated Phosphate Topical SolutionsUsing Reaent-Free Chromatograaphy

Characterizing sub-topical functions

In this paper, we first give a characterization of sub-topical functions with respect to their lower level sets and epigraph. Next, by using two different classes of elementary functions, we present a characterization of sub-topical functions with respect to their polar functions, and investigate the relation between polar functions and support sets of this class of functions. Finally, we obtai...

Editor Note Editor Note

Journal of Leukemia is an open access journal organized by OMICS International, a self-supporting organization. The journal includes a wide range of fields in all areas of hematooncology, mainly related to multiple myeloma, acute lymphoblastic leukemia, acute myeloid leukemia, chronic lymphocytic leukemia, chronic myeloid leukemia, hairy cell leukemia, pediatric leukemia and other relevant fiel...