Akira Usui

Effectiveness of Aroma on Work Efficiency: Lavender Aroma during Recesses Prevents Deterioration of Work Performance (2005)

Sakamoto, Reiko, Minoura, Kazuya, Usui, Akira, Ishizuka, Yoshikazu, Kanba, Shigenobu

The present study investigated whether exposure to aromas during recess periods affects work performance. Subjects comprised 36 healthy male students (mean age, 24.2 ± 2.2 years) who were randomly...

Self-organized propagation of dislocations in GaN films during epitaxial lateral overgrowth (2000)

Sakai, Akira, Sunakawa, Haruo, Kimura, Akitaka, Usui, Akira

Dislocation propagation and defect evolution in GaN films formed by epitaxial lateral overgrowth (ELO) are examined by transmission electron microscopy. A novel effect that induces self-organized...

Dislocation propagation in GaN films formed by epitaxial lateral overgrowth (2000)

Sakai, Akira, Sunakawa, Haruo, Kimura, Akitaka, Usui, Akira

We have investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) the relationship between surface morphological evolution and dislocation propagation in GaN films...

(Table 2) Location, age of accompanied sediments, chemical and Sr isotopic compositions of manganese nodules in DSDP/ODP cores (1998)

Ito, Takashi, Usui, Akira, Kajiwara, Yoshimichi, Nakano, Takanori

Strontium isotopic compositions of acetic acid (HOAc) leachate fractions of eight manganese oxide deposits from the modern seafloor, and of twenty-one buried manganese nodules from Cretaceous to...