• Journal of the Korean Society for Precision Engineering
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• v.18 no.11
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• pp.74-79
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• 2001

In this two-part paper, a virtual machine tool (VMT) is presented. In part 1, the analytical foundation of a virtual machining system, envisioned as the foundation for a comprehensive simulation environment capable of predicting the outcome of cutting processes, is developed. The VMT system purposes to experience the pseudo-real machining before real cutting with a CNC machine tool, to provide the proper cutting conditions for process planners, and to compensate or control the machining process in terms of the productivity and attributes of products. The attributes can be characterized with the machined surface error, dimensional accuracy, roughness, integrity and so forth. The main components of the VMT are cutting process, application, thermal behavior and feed drive modules. In part 1, the cutting process module is presented. The proposed models were verified experimentally and gave significantly better prediction results than any other method. The thermal behavior and feed drive modules are developed in part 2 paper. The developed models are integrated as a comprehensive software environment in part 2 paper.

• Transactions of the Korean Society of Automotive Engineers
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• v.14 no.2
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• pp.39-48
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• 2006

An engine cooling system affects overall performances of an engine which has been recently requested higher power in more confined engine room. The design of efficient cooling system demands a great effort to effectively correlate with each components, such as water jacket, radiator, coolant pump, cooling fan, etc. Thus, the aim of this study is to provide the design tool of the cooling system in the early design stage by enabling for the designer to accurately predict the engine cooling performances. This user-friendly design tool has various ways to assemble each components and control the running condition with related database. The present design tool was simulated and compared with experimental data. As a result, the inlet and outlet temperature of the radiator agree very well with experiments. It was concluded that the present design tool could be effectively used for the design of the engine cooling system.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06c
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• pp.458-468
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• 1996

The Oil Palm industry has developed tremendously with the increasing of planted area from 54,000 hectaresin 1960 to about 2.28 million hectares in 1995. This is expected to increase further to 2.5 million hectares by the year 2000. However, there has been an increasing difficulty in obtaining sufficient labour for the oil palm plantations. At present , harvesting of oil palm fresh fruit is facing an acute shortage of workforce as the workers are much more attracted to the better working environment and salary in the industrial sector. Harvesting of short palm is easily done by using a chisel attached to a short steel pole. Cutting is done by moving the tool at high speed to the target. The weight of the tool coupled with the speed of throwing will produce enough energy to cut the bunch stalk. In this cutting method, sharpness of the cutting device, weight of tool and the speed of throwing contribute to the efficiency of the tool . For the tall palms, a sickle attached to a ong pole is used and the job is more difficult compared to the short palms. Lifting of pole and cutting jobs require great effort and skills. This paper describes the basic design needs in developing an appropriate device that is practical for field use. A prototype design was developed and tested.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.274-278
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• 2002

Surface finishing is still indispensable for most rapid prototyping (RP) processes because of the inherent stair-stepped surface and shrinkage of the parts. These problems can be minimized in the $VLM-_ST$ Process, because it uses expandable polystyrene foam sheets, each of which has a thickness of3.9 mm and a linear-interpolated side slope. The use of thick layers, however, limits the process capability of constructing fine details. This study focuses on the design of post-processing tool for fine details of $VLM-_ST$ parts and investigation of thermal characteristics during EPS foam cutting using the post-processing tool. To calculate the heat flux from the tool into the foam sheet, the tool was modeled as a heat source of radiation for finite element analysis. Results of the analysis agreed well with those of the experiment.

• The Transactions of the Korea Information Processing Society
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• v.7 no.1
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• pp.20-28
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• 2000

In distributed data processing environments, heterogeneous data sources should corporate each other. The CORBA standards proposed by OMG solve this problem by the integration of platform independent applications. In this paper, we design and implement a CASE tool that help linking CORBA applications to relational databases by interface method. This CASE tool manipulates the database schema and generates IDL and $C^{++}$ stubs corresponding to the schema. We explain the code generation process and evaluate the data access performance of the interface method compared to adapter method and various implementation languages. The implemented tool can be used for developing applications that need relational database corporation environments such as distributed information systems or data warehousing. etc.

• Journal of Korean Clinical Nursing Research
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• v.14 no.1
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• pp.71-84
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• 2008

Purpose: The purpose of this study was to develop a performance tool to evaluate operating room nurses. Method: In the first stage, 59 preliminary items were selected after two focus group meetings were carried out using as background a reference review. At this stage 59 items were developed. Next, the selected preliminary items were modified by an expert group of nurses with over 10 years experience, nurses holding doctoral degrees and professors in nursing. In the third and fourth stage, these items were analyzed by the expert group to determine validity and tested by hospital nurses with over 10 years experience to determine reliability Results: For the final tool, the 59 items, 47 items for the performance evaluation dimension and 12 items for the competence evaluation dimension were found to be valid and reliable. Cronbach's $\alpha$ was .9622, a promising alpha value for the total instrument. Conclusion: This tool is an efficient performance evaluation instrument providing meaningful feedback for operating room nurses.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.24 no.3
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• pp.571-580
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• 2014

Digital Records, which are created, stored, and managed in digital form, contains security vulnerability such as data modification, due to the characteristic of digital data. Therefore it is necessary to guarantee the reliability by verification of integrity and authenticity when managing digital records. This paper propose digital forensics based migration process for electronic records by analyzing legacy digital forensics process, and derives the requirements to develop digital forensics based electronic records migration tool through analyzing trends of abroad digital records migration technique and tool. Based on these develop digital forensic based digital records migration tool to guarantee integrity and authenticity of digital records.

• The Transactions of the Korea Information Processing Society
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• v.6 no.12
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• pp.3435-3446
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• 1999

The application of Computer Aided Design (CAD) tool to rehabilitative surgery of the hand is a new field of endeavor. It is considered that there are currently no existing systems designed to assist the orthopedic surgeon in planning complex procedures such as tendon transfer operations. Most tendon transfer operations are performed by surgeons on the basis of knowledge and experience gained through years of practice. However, with the help of this computer graphics-based CAD tool for planning tendon paths, the planning and the evaluation for the best operation on patients' hands also may be possible. The purpose of this study was to model kinematically the structure of the hand and design a prototype tendon path planning tool with a standard computer graphics library, in order for surgeons to perform tendon transfer surgery more objectively and quantitatively.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.19 no.2
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• pp.217-224
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• 2009

This study aims to show the guideline to select optimal anti-vibration gloves for specific power tools to prevent hazardous vibration to human body. It is most desirable for the correct evaluation of handtransmitted vibration form the power tool handle to measure the acceleration between the handle surface and the hand palm as recommended in ISO 5349-1. First, the accurate acceleration measurement device was developed of which the thickness and weight were less than 6 mm and 12 g respectively so that it can be placed between the handle and the palm without any inconvenience during the measurement. Finally, using the device we estimated anti-vibration glove performances considering the frequency characteristics of generated vibration by the power tool.

• The Journal of Korean Association of Computer Education
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• v.22 no.5
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• pp.67-77
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• 2019

The purpose of this study is to develop and validate a general-purpose evaluation tool and to analyze their applicability in problem solving programming education for college students of teacher training college. For this purpose, we have redefined the area of computational thinking and detail elements from the viewpoint of problem solving programming, and developed general-purpose computational thinking scale to evaluate them. The reliability and validity were analyzed by applying the evaluation tool developed for the actual college students of teacher training college. Through this study, it was confirmed that the a general-purpose evaluation tool developed in this study can be used as a tool to computational thinking assessment and can be generalized.