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The paper aims to promote the development of intelligent materials and the 4D printing technology by introducing recent advances and applications of additive layered manufacturing (ALM) technology of intelligent materials and the development of the 4D printing technology. Also, an arm-type ALM technology of shape memory polymer (SMP) with thermosetting polyurethane is briefly introduced.

This paper begins with an overview of the development and applications of intelligent materials around the world and the 4D printing technology. Then, the authors provide a brief outline of their research on arm-type ALM technology of SMP with thermosetting polyurethane.

The paper provides the recent developments and applications of intelligent materials and 4D printing technology. Then, it is suggested that intelligent materials mixed with different functional materials will be developed, and these types of materials will be more suitable for 4D printing.

This paper overviews the current developments and applications of intelligent materials and its use in 4D printing technology, and briefly states the authors’ research on arm-type ALM technology of SMP with thermosetting polyurethane.

The purpose of this paper is to investigate the effect of remelting each layer on the homogeneity of nickel-titanium (NiTi) parts fabricated from elemental nickel and titanium powders using laser powder bed fusion (LPBF). In addition, the influence of manufacturing parameters and different melting strategies, including multiple cycles of remelting, on printability and macro defects, such as pore and crack formation, have been investigated.

An LPBF process was used to manufacture NiTi alloy from elementally blended powders and was evaluated with the use of a remelting scanning strategy to improve the homogeneity of fabricated specimens. Furthermore, both single melt and up to two remeltings were used.

The results indicate that remelting can be beneficial for density improvement as well as chemical and phase composition homogenization. Backscattered electron mode in scanning electron microscope showed a reduction in the presence of unmixed Ni and Ti elemental powders in response to increasing the number of remelts. The microhardness values of NiTi parts for the different numbers of melts studied were similar and ranged from 487 to 495 HV. Nevertheless, it was observed that measurement error decreases as the number of remelts increases, suggesting an increase in chemical and phase composition homogeneity. However, X-ray diffraction analysis revealed the presence of multiple phases regardless of the number of melt runs.

For the first time, to the best of the authors’ knowledge, elementally blended NiTi powders were fabricated via LPBF using remelting scanning strategies.

In the present study, the authors examined whether academic performance [grade point average (GPA)] can be predicted by self-reported frequency of memorization and recitation, verbatim memory performance, and self-efficacy in a sample of college students from Saudi Arabia.

Students' verse memory, word memory, experience with memorization and recitation, as well as general self-efficacy were measured. GPA was provided by the Office of the Registrar.

Verbatim memory performance for individual words and verses moderately predicted GPA.

To be determined is the extent to which memory skills for different materials are related to memorization and recitation practice as well as encoding preferences.

The findings indicate that even though in college a premium is placed on activities that transform the format of the materials to be learned, activities that replicate materials may still be helpful.

In Western pedagogy, memorization and recitation are considered counterproductive modes of information acquisition. The findings of this study illustrate that retention is an essential processing step upon which the complex cognitive activities that are embedded in college-level curricula rely.

The extant literature illustrates the benefits of exceptional memorization and recitation training. The findings suggest that academic success is positively related to what would be judged as moderate practice, thereby supporting the notion that benefits exist.