Protocol of an adaptive mobile health intervention for the management of gestational weight gain: The LEAP cluster randomized controlled trial.

Background: More than half of pregnant patients with overweight or obesity exceed national gestational weight gain (GWG) guidelines, increasing their risk of adverse outcomes. There is an urgent need to develop effective and scalable interventions to improve GWG.

Objective: To describe the protocol of Lifestyle, Eating, and Activity in Pregnancy (LEAP), a cluster randomized controlled trial evaluating a mobile health (mHealth) intervention promoting appropriate GWG in an integrated healthcare system.

Modern 3D cephalometry in pediatric orthodontics-downsizing the FOV and development of a new 3D cephalometric analysis within a minimized large FOV for dose reduction.

Objectives: Dose reduction achieved by downsizing the field of view (FOV) in CBCT scans has brought no benefit for pediatric orthodontics, until now. Standard 2D or 3D full-size cephalometric analyses require large FOVs and high effective doses. The aim of this study was to compare a new 3D reduced-FOV analysis using the Frankfurt horizontal (FH) plane as reference plane with a conventional full-size analysis using the Sella-Nasion (S-N) plane as reference plane.

A nanoporous two-dimensional polymer by single-crystal-to-single-crystal photopolymerization.

In contrast to the wide number and variety of available synthetic routes to conventional linear polymers, the synthesis of two-dimensional polymers and unambiguous proof of their structure remains a challenge. Two-dimensional polymers-single-layered polymers that form a tiling network in exactly two dimensions-have potential for use in nanoporous membranes and other applications. Here, we report the preparation of a fluorinated hydrocarbon two-dimensional polymer that can be exfoliated into single sheets, and its characterization by high-resolution single-crystal X-ray diffraction analysis.

A two-dimensional polymer prepared by organic synthesis.

Synthetic polymers are widely used materials, as attested by a production of more than 200 millions of tons per year, and are typically composed of linear repeat units. They may also be branched or irregularly crosslinked. Here, we introduce a two-dimensional polymer with internal periodicity composed of areal repeat units.