A Roadmap for Ferroelectric-Antiferroelectric Phase Transition.

Antiferroelectric materials have shown great potential in electronic devices benefiting from the reversible phase transition between ferroelectric and antiferroelectric phases. Understanding the dipole arrangements and clear phase transition pathways is crucial for design of antiferroelectric materials-based energy storage and conversion devices. However, the specific phase transition details remain largely unclear and even controversial to date.

Large Polarization Near 50 μC/cm in a Single Unit Cell Layer SrTiO.

The generally nonpolar SrTiO has attracted more attention recently because of its possibly induced novel polar states and related paraelectric-ferroelectric phase transitions. By using controlled pulsed laser deposition, high-quality, ultrathin, and strained SrTiO layers were obtained. Here, transmission electron microscopy and theoretical simulations have unveiled highly polar states in SrTiO films even down to one unit cell at room temperature, which were stabilized in the PbTiO/SrTiO/PbTiO sandwich structures by in-plane tensile strain and interfacial coupling, as evidenced by large tetragonality (∼1.

Atomic Insight into the Successive Antiferroelectric-Ferroelectric Phase Transition in Antiferroelectric Oxides.

Antiferroelectrics characterized by voltage-driven reversible transitions between antiparallel and parallel polarity are promising for cutting-edge electronic and electrical power applications. Wide-ranging explorations revealing the macroscopic performances and microstructural characteristics of typical antiferroelectric systems have been conducted. However, the underlying mechanism has not yet been fully unraveled, which depends largely on the atomistic processes.

[Epidemic situation of malaria in Qingdao City from 2012 to 2017].

Objective: To investigate the epidemic situation and its epidemic characteristics of malaria in Qingdao City from 2012 to 2017, so as to provide the evidence for the prevention and control of malaria in this city.

Methods: The data of cases and epidemiological characteristics of malaria in Qingdao City, 2012-2017 were collected from the China's disease prevention and control system infectious disease report information management system and parasitic disease prevention and control information management system, and analyzed.

Results: A total of 103 cases of malaria were reported in Qingdao City from 2012 to 2017, and all of them were imported.

[Effects of Nurse-Led Team Management on Type 2 Diabetes Patients in the Community].

Background: Managing increasing numbers of diabetic patients is placing increasing pressure on healthcare providers, especially general practitioners, who usually serve in multiple roles. This situation has caused generally poor results in terms of diabetes management. However, community nurses in some countries have successfully and effectively controlled chronic diseases among their patients.

[Simulation of the branch biomass for Chinese fir plantation using the linear mixed effects model].

Based on data obtained from 572 branches of 45 Chinese fir trees in Jiangle Forest Farm, Fujian Province, southeast China, prediction models for branch, foliage biomass and total branch and foliage biomass of individual tree were developed by linear mixed effects (LME) method, and tested by independent samples. The results showed that the LME models provided better performance than the multiple linear regression models for the branch, foliage and total biomass prediction of Chinese fir plantation. The LME models with different combinations of the random effects parameters had different fitting precisions.

Association of CYP2E1 and NAT2 polymorphisms with lung cancer susceptibility among Mongolian and Han populations in the Inner Mongolian region.

Purpose: To explore associations of CYP2E1 and NAT2 polymorphisms with lung cancer susceptibility among Mongolian and Han populations in the Inner Mongolian region.

Materials And Methods: CYP2E1 and NAT2 polymorphisms were detected by PCR-RFLP in 930 lung cancer patients and 1000 controls.

Results: (1) Disequilibrium of the distribution of NAT2 polymorphism was found in lung cancer patients among Han and Mongolian populations (p=0.