private void initColumns()
	{
		Integer smallColumnSize = 40;
		Integer timeColumnSize = 100;
		
		Integer[] smallColumns = {0, 1 , 2, 3, 5};
		Integer[] timeColumns = {6, 7, 8, 9};
		
		for (Integer column : smallColumns) {
			this.getColumnModel().getColumn(column).setPreferredWidth(smallColumnSize);
		}
		
		for (Integer column : timeColumns) {
			this.getColumnModel().getColumn(column).setPreferredWidth(timeColumnSize);
		}
	}