\documentclass[12pt,a4paper]{article}
\textwidth160mm
\textheight247mm
\oddsidemargin0cm
\topmargin-0.5in
\pagestyle{empty}
\renewcommand{\baselinestretch}{1}
\begin{document}
\begin{center}
% TITLE
{\large{\bf Abstract preparation for the ISNTT 2019} }
% AUTHORS
\vskip0.5\baselineskip{\bf First A. Author$^{1}$, Second
  B. Author$^{1,2}$, and Third C.  Author${^2}$ }
% AFFILIATION
\vskip0.5\baselineskip{\em$^{1}$Affiliation 1 \\$^{2}$Affiliation 2 }
\end{center}
% ABSTRACT BODY

In this document, we present guidelines for the preparation of abstracts for the 
International School and Symposium on Nanoscale Transport and phoTonics {\mbox ISNTT 2019}, to be held 
in Atsugi, Japan, on 18–22 November 2019. The abstracts provided by the participants will be 
directly inserted in the abstract book.\\
The maximum length of the abstract is one page, including tables, figures and references.
The abstract should be in A4 format, typeset in 12pt font (Roman or equivalent, or the default 
\LaTeX font). Margins of 25 mm must be left blank around the text (the text area, including 
title, references, graphics etc., is 160 mm by 247 mm. Please do not give any changes to the 
margins.). When preparing the abstract in \LaTeX, use the standard class with the size 
definitions as in the template provided on the symposium web page. 
Please follow the templates (Microsoft Word or LaTeX files available on the symposium 
web page) for the structure of the abstract, formatting its elements (including capitalizing 
the title), spacing between them etc. Use superscripts for relating authors to multiple affiliations.\\

Figures can be included in the abstract. Please do not increase the resolution beyond the 
reasonable level. Format the references [1,2] as shown below.

\underline{You must convert your abstract to the PDF format before submission.} The resulting file 
size should not exceed 5 MB. \underline{Only PDF file is acceptable for abstract submission} and other 
formats (such as Word, LaTeX, etc) are unacceptable.

\begingroup
\renewcommand{\section}[2]{}
\begin{thebibliography}{0}
\setlength{\parskip}{0mm}
\setlength{\itemsep}{-0.3mm}
\small
\bibitem{reference1} A. Author, B. Coauthor, J. Sci. Res. \textbf{13}, 1357 (2016). 
\bibitem{reference2} A. Author, B. Coauthor, J. Sci. Res. \textbf{17}, 7531 (2017). 
\end{thebibliography}
\endgroup


\end{document} 