Academic, library and technology organizations are denouncing a new sharing and hosting policy adopted last month by publisher Elsevier, saying it undermines open-access policies at colleges and universities and prevents authors from sharing their work. Elsevier, which publishes thousands of journals, introduced the policy last month. It aims to strike a balance between making sharing “simple and seamless” and “being consistent with access and usage rights associated with journal articles,” the publisher said in a blog post.