Hak-Joon Kim

The primary purpose of the study was to identify motivations for hyperlinking in scholarly electronic articles. Fifteen Indiana University faculty and graduate students who had published at least one scholarly electronic article containing at least one external hyperlink were surveyed. Through a series of qualitative interviews, 19 different hyperlinking motivations, classified into the three motivational groups—scholarly, social, and technological—along the dimensional ranges of their propertie

By using a small number of Gaussian basis functions, one can synthesize the wave fields radiated from planar and focused piston transducers in the form of a superposition of Gaussian beams. Since Gaussian beams can be transmitted through complex geometries and media, such multi-Gaussian beam models have become powerful simulation tools. In previous studies the basis function expansion coefficients of multi-Gaussian beam models have been obtained by both spatial domain and k-space domain methods.

The purpose of the study was to examine differences in reading performance when an electronic test format with a scrolling text mode on a LCD monitor and a traditional paper test format were used to present reading tests to teenagers who belong to Generation Z. In this study, participants were 108 high school students who each read two different reading passages, one from paper and the other from an LCD monitor. The results show that teenagers' reading performance is affected by a presentation m

The primary purpose of the study was to examine whether senior citizens' use of online social networks affect their cognitive function.For this study, 213 senior citizens who are at least 60 years of age and do not have pre-diagnosed Alzheimer's disease (AD) were randomly selected from a variety of local communities such as a non-AD-patient-retirement home.To measure the cognitive function levels of the selected senior citizens, the Mini Mental State Exam (MMSE), which is the most widely used st

Flaws at dissimilar metal welds (DMWs), such as reactor coolant systems components, Control Rod Drive Mechanism (CRDM), Bottom Mounted Instrumentation (BMI) etc., in nuclear power plants have been found. Notably, primary water stress corrosion cracking (PWSCC) in the DMWs could cause significant reliability problems at nuclear power plants. Therefore, phased array ultrasound is widely used for inspecting surface break cracks and stress corrosion cracks in DMWs. However, inspection of DMWs using

The industrial use of ultrasonic flaw classification using neural networks in weldments must overcome many challenges. A major constraint is the use of numerous systems, including a combination of transducers and equipment. This causes high complexity in the datasets used in the training of neural networks, which decreases performance. In this study, the performance of a neural network was enhanced using signal processing on an ultrasonic weldment flaw dataset to achieve system invariance. The d

Distance Education (DE) is playing an increasingly central role in the education and training of librarians. Despite its growing importance, there is little research into the reaction of library employers to these programs and their new graduates. For this study, a questionnaire survey was conducted with 202 libraries that posted job advertisements to the LIBJOBS mailing list for an entry-level or low-level professional librarian position. The survey leads to several observations. First, despite

Abstract The primary purpose of this paper is to investigate what factors crucially affect scholar's acceptance of e-journals. Before reviewing various aspects of e-journals, it is necessary to fully understand the traditional journal system, because the developments, roles, and deficiencies of the paper journal system will illustrate some basic requirements for successful e-journals. This article also examines the developments of e-journals and presents a comprehensive examination of the econom