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Yongwon Kim,Shin Park,Jaehoon Lee 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05
One of the most important national tasks of the current administration is to realize social value and boost the economy. In the road sector, it is particularly important to ensure the road sectors public good and create jobs based on the Framework Act on the Realization of Public Institutions’ Social Value (Proposal). In regard to job creation in the road sector, however, there has so far been a lack of career management for construction engineers. In this regard, this study used Monte Carlo simulation and analyzed how to estimate the amount of manpower required to efficiently manage engineering human resources in the road sector. Monte Carlo simulation uses random numbers for prediction and estimation, extracts values repeatedly from a probability distribution predefined by the user, and performs tasks on various scenarios. This study made the following assumptions for the analysis: (a) researchers’ abilities were identical; (b) the research project was analyzed on a 1 year basis while technical advice was analyzed on a 9-week basis to reflect the characteristics of the road sector; (c) technical advice had the same probability from Week 1 to Week 52; (d) the amount of manpower required for a project carried over to the next year was input at the beginning of the year; and (e) the largest amount of manpower required at any particular time in a year was calculated and estimated as required manpower. The input variables were an estimated number of project and technical advice in each research field while the output variables were the amount of manpower and technical advice required for each research project. Simulation was performed 10,000 times. An analysis found that required number of manpower for case analysis was 75 as opposed to the current number of 66, assuming that 57 research projects were undertaken and technical advice was provided 223 times. Every sector is making efforts to create social value through various means. The field of construction social overhead capital is no exception. It has undertaken a very important task to ensure the role of roads in public good and create jobs. However, there is still a lack of objective approach to estimate the required amount of manpower. Thus, as done in this study, calculating required manpower through the simulation method would be useful as an objective evidence for job creation.
Memory Die Clustering and Matching for Optimal Voltage Window in Semiconductor
Yongwon Park,Seokho Kang,Sungzoon Cho Institute of Electrical and Electronics Engineers 2015 IEEE transactions on semiconductor manufacturing Vol.28 No.2
<P>In this paper, we propose a method to optimize the product performance instantly by utilizing the internal voltage trimming circuit for Dynamic Random Access Memory (DRAM) memory. Specifically, we first define the verification wafer as the internal voltage characteristics using the clustering technique. Second, the optimized voltage conditions are applied to a normal wafer being matched with a verification wafer. The proposed method makes the ability to apply a different voltage trimming condition for each dies internal voltage circuit depending on their characteristics, thereby improving the characteristics of the individual dies and reducing the fail bit count (FBC) further. The experimental results on the real-application case show that our proposed method reduces the FBC by 1%-5%, which contributes yield enhancement and quality improvement of DRAM memory by raising the efficiency of the redundancy cell repair in the repair process.</P>
Wearable Wireless Interface Based on Brain Activity and Eye Movement
Yongwon Kim,Sungho Jo 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
This paper presents the development of a wearable wireless interface based on brain activity and eye movement. A low-cost electroencephalogram (EEG) headset to read human intention is combined with a custom-built eye-gaze tracker to track eye movement. This wireless, wearable interface addresses limitations in previous hybrid interfaces by restoring freedom of movement. The proposed interface allows users to find an electronic item of interest by gazing at it and turn it on by concentrating. We examine the potential of the proposed interface to fit into our daily life through our experimental scenario. The experimental scenario simulates finding and turning on devices.
Yongwon Kim,Shin Park,Jiho Park 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05
This study examined the characteristics of research activities in the road sector via an analysis of patents and papers. For the text mining analysis, this study used keywords that contained the term “highway” and extracted data; 25,306 patents and 11,940 papers were used for the analysis. Along with a paper analysis, there is a 3P (paper, patent and patent) analysis method used to examine papers and patents. The 3P analysis method analyzes patent trends (time series, country, applicant, institution, and so on), original technology patents, the latest technology trends in the field of interest, and research trends by examining and evaluating key patent rights and their technology and utilization values. More specifically, analyzing patents owned by companies and papers published based on data obtained from text mining, allows researchers to compare intellectual property competitiveness by institution and identify a competitor’s research trends. Based on the results, commercialized tech areas and global research activity trends can be identified to establish a technology strategy. In this regard, this study used keywords only related to “highway” and acquired the following analysis results: To begin with, some of the most noteworthy research and development areas in the road and transport sector recently included “traction hybrid battery,” “information navigation date,” and “navigation determination.” This suggests great implications. Thus far, the road and transport section has traditionally researched “Construction of Roads, Railways, or Bridges” in Section E (Fixed Constructions) of the International Patent Classification and supporting works such as the installation of supports for the road or the construction of platforms, snow fences or similar arrangements. This study, however, found that lately, a lot of research is being conducted on systems such as transport control systems, transport safety, transport control radars or similar systems, sonar or Light Detection and ranging system, and anti-collision systems. In addition, as smart toll collection increasingly becomes available, a lot of research in the field of physics is being undertaken on transmission methods for measures, control signals or similar signs, and ticket dispensers or devices to collect tolls and admission fees. In conclusion, based on the above findings, this study was able to identify that more research in the road and transport sector is being conducted on smart toll collection and tech convergence such as physics and systems than traditional civil engineering as today’s world is heading towards the 4th Industrial Revolution.