title: Descriptive study of electromagnetic wave distribution for various seating positions: using digital textbooks.
abstract: To better understand environmental electromagnetic wave exposure during the use of digital textbooks by elementary school students, we measured numeric values of the electromagnetic fields produced by tablet personal computers (TPCs). Specifically, we examined the distribution of the electromagnetic waves for various students' seating positions in an elementary school that uses digital textbooks. Electric and magnetic fields from TPCs were measured using the HI-3603 Visual Display Terminal/ Very Low Frequency (VDT/VLF) radiation measurement system. Electromagnetic field values from TPCs measured at a student's seat and at a teacher's computer were deemed not harmful to health. However, electromagnetic field values varied based on the distance between students, other electronic devices such as a desktop computers, and student posture while using a TPC. Based on these results, it is necessary to guide students to observe proper posture and to arrange seats at an appropriate distance in the classroom.
authors.affiliation: 1College of Nursing, Korea University, Seoul, Korea.
authors.forename: GyeongAe
authors.initials: G
authors.lastname: Seomun
authors.forename: YoungHwan
authors.initials: Y
authors.lastname: Kim
authors.forename: Jung-Ah
authors.initials: JA
authors.lastname: Lee
authors.forename: KwangHoon
authors.initials: K
authors.lastname: Jeong
authors.forename: Seon-A
authors.initials: SA
authors.lastname: Park
authors.forename: Miran
authors.initials: M
authors.lastname: Kim
authors.forename: Wonjung
authors.initials: W
authors.lastname: Noh
mesh_terms: D002648:Child; D003201:Computers / Q000706:statistics & numerical data*; D060733:Electromagnetic Radiation; D004781:Environmental Exposure / Q000706:statistics & numerical data*; D006801:Humans; D011187:Posture; D012574:Schools; D013334:Students; D011795:Surveys and Questionnaires
keywords: digital textbook; electromagnetic field; elementary students; environmental; school