Redimensiona de acordo com o maior

$(document).ready(function () {
    var headerHeight = 0;
    var segmentHeight = 0;

    $('#participante-form .column > .ui.header').each(function () {
        if ($(this).height() > headerHeight) {
            headerHeight = $(this).height();
        }
    });

    $('#participante-form .column > .ui.segment').each(function () {
        if ($(this).height() > segmentHeight) {
            segmentHeight = $(this).height();
        }
    });

    $(window).resize(function () {
        var mobile = !window.matchMedia('(max-width: 768px)').matches;
        $('#participante-form .column > .ui.header').height(mobile ? headerHeight : 'auto');
        $('#participante-form .column > .ui.segment').height(mobile ? segmentHeight : 'auto');
    });

    $(document).trigger('resize');
});