Myungjae Kwak

Middle Georgia State University · Department of Information Technology

Over the past few years, a large number of mobile devices are being used in real life with the advancement of wireless technology. The explosive increase in the number of wireless mobile devices makes it impossible to avoid the co-channel interference (CCI) or adjacent channel interference (ACI) phenomenon. Therefore, this interference phenomenon h...

Tandem mass spectrometry (MS/MS) is a popular technology for identifying small molecules involved in metabolism, better known as metabolites. Coupled with liquid chromatography (LC), LC-MS/MS instruments first separate, ionize, and fragment metabolites, then measure mass-to-charge ratios (m/z) and intensities of metabolite fragments. Understanding...

Background The increased environmental uncertainty caused by the global pandemic creates challenges for academic incubators. The lack of vital services has decreased the chances of entrepreneurial success for student ventures. This study aims to provide insights into the impact of environmental uncertainties on students’ relationships with academic...

Graph autoencoder can map graph data into a low-dimensional space. It is a powerful graph embedding method applied in graph analytics to lower the computational cost. Researchers have developed different graph autoencoders for addressing different needs. This paper proposes a strategy based on noise injection for graph autoencoder training. This is...

Researchers in bioinformatics and medical science fields have been developing various innovative information systems and software tools using emerging technologies. Metabolite profiling is one of the fields in which bioinformatics researchers are intensely developing various innovative methods and software tools. Metabolites are the intermediate an...

The static k-Nearest Neighbor (k-NN) method for localization has limitations in accuracy due to the fixed k value in the algorithm. To address this problem, and achieve better accuracy, we propose a new dynamic k-Nearest Neighbor (Dk-NN) method in which the optimal k value changes based on the topologies and distances of its nearest neighbors. The...

This study investigates the underlying motivational factors of knowledge exchange intentions (intention to obtain and to provide knowledge) within virtual community contexts. Perceived virtual network structures, namely virtual network connectivity (CN) and virtual network closeness (CL), are suggested as the important antecedents of knowledge shar...

Video-game playing is popular among college students. Cognitive and negative consequences have been studied frequently. However, little is known about the influence of gaming behavior on IT college students’ academic performance. An increasing number of college students take online courses, use social network websites for social interactions, and p...

This study presents an initial attempt to uncover psychological and environmental factors influencing the academic performance of video gamers. We surveyed IT undergraduate students with respect to their video-gaming experiences. For the psychological factors at hand, we found that task awareness or the ability to stay focused on business activiti...

Digital forensics is a rapidly growing and emerging field in information security. The need for digital forensics experts is expected to continue to grow over the next ten years to respond to ever growing incidents of cybercrime. The field of digital forensics is complex and requires a diverse set of skills through expensive specialized tools. In a...

Although biomedical information available in articles and patents is increasing exponentially, we continue to rely on the same information retrieval methods and use very few keywords to search millions of documents. We are developing a fundamentally different approach for finding much more precise and complete information with a single query using...

We describe a new biomedical search engine that enables visual searching and utilises predicates instead of phrases. We report on the development and evaluation of the triple parser, the most essential component of the search engine, which extracts the necessary predicates from the biomedical text. Using texts from three biomedical related sites (N...

Cardiotocograms (CTG) monitor fetal heart rate and uterine contractions and are routinely used as a diagnostic tool by obstetricians to determine fetal state. Evaluation of CTG traces require an extensive visual interpretation subject to extensive inter and intra observer variability. A neural network implementation would automatically evaluate fet...

A search engine that supports finding precise biomedical statements, but also complementary, and contrasting information would greatly help biomedical researchers. We propose the use of predicates in a search engine's underlying data structure to accomplish this. A predicate is a triple that combines two phrases with a predicate. We report on the d...

Local governments are increasingly becoming involved in providing municipal wireless services as technology develops. However, many obstacles exist in municipal wireless provision which is economical, social, and political rather than technical. Therefore, we suggest a multi-layered analysis framework to analyze the Information Computer Technologie...

As technology develops, local governments are increasingly becoming involved in providing municipal wireless service. However, many obstacles exist in municipal wireless provision which are economical, social, and political rather than technical. Therefore, we suggest a multi-layered analysis framework to analyze the information computer technologi...

As XML becomes a standard for communications between distributed heterogeneous machines, many schools plan to implement Web Services systems using the XML e-transcript (electronic transcript) standard. We propose a framework that supports both XML e-transcript Web Services and existing EDI e-transcript systems. The framework uses the workflow engin...

When a workflow process spans to multiple organizations, subprocess task model is an efficient way of representing remote services of other systems. The subprocess task usually represents a single service in conventional workflows. However, if a subprocess task comprises multiple services, and the number of services and the execution flow of the se...

When a workflow process is related to many organizations and a diverse set of applications at run time, many approaches usually use subprocess tasks to represent other systems' services: the subprocess task represents a single service. However, if a subprocess task needs to represent multiple subprocesses and moreover the number and execution flow...

In this paper, we propose a framework supporting dynamic interoperation between heterogeneous workflow systems and workflow-based dynamic Enterprise Application Integration (EAI). To this end, based on Subflow Task Model and Multi-Tiered Dynamic State Transition Model, four major components are defined: The workflow engine, Adapter, Service Interfa...

The broadband wireless access (BWA) market in the U.S. and around the world is expected to accelerate its growth in the next few years. WiMax is one promising technology expected to play an important role in the implementation of broadband wireless systems. However, many factors in addition to the technology choice contribute to the success of a BW...