'non-strided'

def module_s1(self, nfm, first=False):

    sidepath = (Conv(**self.conv_params(1, (nfm * 4), 1, False, False)) if first else SkipNode())
    mainpath = ([] if first else [BatchNorm(), Activation(Rectlin())])
    mainpath.append(Conv(**self.conv_params(1, nfm)))
    mainpath.append(Conv(**self.conv_params(3, nfm)))
    mainpath.append(Conv(**self.conv_params(1, (nfm * 4), relu=False, batch_norm=False)))
    return MergeSum([sidepath, mainpath])
