• Journal of Korean Academy of Nursing Administration
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• v.19 no.1
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• pp.146-154
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• 2013

Purpose: To do nursing research effectively requires an understanding of fundamental principles of statistical methods. In this article, some key statistical methods which are commonly used in nursing research are identified and summarized. Methods: Ninety-two original articles from the Journal of Korean Academy of Nursing Administration were reviewed. Statistical methods were classified and summarized for usage in research and occurrence of common errors. Results: Among the original articles reviewed, 58 statistical usages contained errors. Most errors were found in linear regression analysis, Pearson correlation analysis, and chi-square test. From the detection of statistical errors in usage, suggestions for appropriate statistical methods were made. Conclusion: In order to improve validity of original articles in the Journal of Korean Academy of Nursing Administration, clearly stated statistical usage and close editorial attention to statistical methods are needed. Understanding statistical methods is part of the process that researchers must use to determine both quality and usefulness of the research. Research findings will be used to guide nursing practice and reduce uncertainty in decision making. However, to understand how to interpret research results, it is important to be able to understand basic statistical concepts. Researchers should also choose statistical methods that match their purposes.

• Journal of Korean Society of Forest Science
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• v.82 no.1
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• pp.34-43
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• 1993

In this paper, the characteristics of cable logging operations are discussed from a standpoint of mechanics. An example of standing skyline operations is used to illustrate the mechanical principles. Using force and moment boundary conditions, the maximum allowable payload was formulated as a function of slope profile, system geometry and operation options. This formulation includes fundamental equations for log drag and single segment mechanics. The catenary link model is the basic assumption in simulating cable segment stretches. In order to demonstrate the solution procedures of the formulation, a computer model was developed. The model uses Secant algorithm to determine the solution of the complex nonlinear equation set. Finally, the computer model was demonstrated using a hypothetical data set.

• Journal of Arbitration Studies
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• v.21 no.1
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• pp.131-155
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• 2011

PICC executes its role as a useful lex mercatoria in the continuously increasing international trade to be adopted as the standard criterion of prevention or dispute resolution. When considering the fact that GISG has not presented results beyond expectation in the past due to hard laws and legal deficiency, PICC, which possesses interpretation and supplementation function, is considered undoubtedly useful particularly in international commercial arbitration. As observed in the previously mentioned analysis on cases accumulated in UNILEX, PICC application and Arbitral tribunal in international contract between parties possess considerably large claim possibility and the number of actual application cases is continuously increasing. The fact that PICC has been composed as maximum common measures of continental and common law systems by traditional comparative legal scholars familiar with international trade can function as the fundamental principle in future global trade activity and can also act as the model law for uniting contract laws of nations. In this aspect, PICC can be evaluated to have considerably achieved enactment purpose of previous intention. However, additional topics that had not been accepted in the revised edition of PICC remain as assignments requiring solution, such as analysis and acceptance problem of comparative law, PR of PICC unfamiliar even to the relative parties of international trade and application in international contract, and absorption problem as model law in various domestic laws.

• The Journal of Korean Association of Computer Education
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• v.8 no.3
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• pp.9-18
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• 2005

The 7th curricula of computer education as a general subject for secondary schools in Korea has relatively stressed on the application softwares as a learning tools. Such approach might be very successful in terms of ICT literacy education, but it is not enough to teach fundamental concepts and principles of information technologies and computer science and it has also limitation to apply such knowledge to expand students' intellectual capabilities. Therefore, in this paper we first investigates the reason of introducing computer science principle education according to IT fluency and show appropriate direction of computer education curricula for secondary schools.

• Journal of the Ergonomics Society of Korea
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• v.33 no.5
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• pp.365-376
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• 2014

Objective:The objective of this study is to apply the principals and policies of universal design to offer a safe and efficient workplace for older workers. Background: The concept of universal design has rapidly developed under the paradigm that tasks should be easy and comfortable for all people with diverse features. The concept is also fitting when designing a workplace. Method: Legislations, policies and precedents of workplaces with older workers have been studied and analyzed. The compilation has been used to project the present and future of employing universal design at workplace devisal. Results: Every country has its own legislations/policies regarding universal design, flexible working, and age-friendly workplaces to increase hire of older workers. The basic concept of UD and its application is explained. This study provides guidelines for employing universal design at workplaces and preventing accidents for older workers. Conclusion: Following the principals of universal design is expected to furnish a comfortable and safe workplace and lengthen the period of workers participating in the labor force in an ageing society. Application: This study offers the principles for universal design, serving as fundamental research for its application to the workplace.

• International Journal of Human Ecology
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• v.13 no.1
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• pp.147-157
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• 2012

The construction of government-sponsored housing in Korea began in the early 1950s. Beyond fulfilling the housing shortage after the Korean War, it also impacted the development of housing in Korea. The aim of this study is to explore the construction and supply of government-sponsored housing and to discuss the positive and negative influences on the modern housing in Korea. In order to achieve the objectives, the pictures and floor plans, newspaper articles and the KNHC publications, which led the public housing supply from 1950 to 1960, were examined. Results indicate as follows: First, government-sponsored housing industrialized the housing production, which satisfied the volume need. The simplified floor plan and exterior, along with the western characteristics, created a new urban landscape. Second, the distinct characteristics of Korean housing were established. By emphasizing development and financial practicality, large scale housing complexes were built with simplified, characterless, and mechanical exteriors in a disconnected territory with neighbor district. Third, government-sponsored housing became the major accelerator to westernize the Korean housing culture. In conclusion, the principles of functionalism of government-sponsored housing have become the fundamental root of Korean housing since the war.

• Structural Engineering and Mechanics
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• v.61 no.5
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• pp.645-655
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• 2017

To determine the seismic applicability of a long-span railway concrete upper-deck arch bridge with concrete-filled steel-tube (CFST) rigid skeleton ribs, some fundamental principles and seismic approaches for long-span bridges are investigated to update the design methods in the current Code for Seismic Design of Railway Engineering of China. Ductile and mixed isolation design are investigated respectively to compare the structural seismic performances. The flexural moment and plastic rotation demands and capacities are quantified to assess the seismic status of the ductile components. A kind of triple friction pendulum (TFP) system and lead-plug rubber bearing are applied simultaneously to regularize the structural seismic demands. The numerical analysis shows that the current ductile layout with continuous rigid frame approaching spans should be strengthened to satisfy the demands of rare earthquakes. However, the mixed isolation design embodies excellent seismic performances for the continuous girder approaching span of this railway arch bridge.

• Nuclear Engineering and Technology
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• v.41 no.1
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• pp.1-10
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• 2009

The safe and reliable performance of fusion and fission plants depends on the choice of suitable materials and an assessment of long-term materials degradation. These materials are degraded by their exposure to extreme conditions; it is necessary, therefore, to address the issue of long-term damage evolution of materials under service exposure in advanced plants. The empirical approach to the study of structural materials and fuels is reaching its limit when used to define and extrapolate new materials, new environments, or new operating conditions due to a lack of knowledge of the basic principles and mechanisms present. Materials designed for future Gen IV systems require significant innovation for the new environments that the materials will be exposed to. Thus, it is a challenge to understand the materials more precisely and to go far beyond the current empirical design methodology. Breakthrough technology is being achieved with the incorporation in design codes of a fundamental understanding of the properties of materials. This paper discusses the multi-scale, multi-code computations and multi-dimensional modelling undertaken to understand the mechanical properties of these materials. Such an approach is envisaged to probe beyond currently possible approaches to become a predictive tool in estimating the mechanical properties and lifetimes of materials.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.7
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• pp.3543-3557
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• 2017

Compression is a very important technique for remotely sensed hyperspectral images. The lossless compression based on the recursive least square (RLS), which eliminates hyperspectral images' redundancy using both spatial and spectral correlations, is an extremely powerful tool for this purpose, but the relatively high computational complexity limits its application to time-critical scenarios. In order to improve the computational efficiency of the algorithm, we optimize its serial version and develop a new parallel implementation on graphics processing units (GPUs). Namely, an optimized recursive least square based on optimal number of prediction bands is introduced firstly. Then we use this approach as a case study to illustrate the advantages and potential challenges of applying GPU parallel optimization principles to the considered problem. The proposed parallel method properly exploits the low-level architecture of GPUs and has been carried out using the compute unified device architecture (CUDA). The GPU parallel implementation is compared with the serial implementation on CPU. Experimental results indicate remarkable acceleration factors and real-time performance, while retaining exactly the same bit rate with regard to the serial version of the compressor.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.51 no.4
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• pp.576-582
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• 2015

The efficiencies of thermal power system using fossil fuel depend on heat exchangers which extract energy from the exhaust gas before it is expelled to the atmosphere. To increase heat transfer efficiency it is very important to maintain the surface of heat exchanger as clean condition. The accepted skill of cleaning of fouled surface of heat exchanger is soot blowing. A high pressure jet of air is forced through the flat surface of plate to remove the deposit of fouling. There is, however, little knowledge of the fundamental principles of how the jet behave on the surface and how the jet actually removes the deposit. Therefore, the study focuses on the measuring of cleaning area and cleaning dwell time after accumulating the simulated deposit on the flat surface. The deposit test rig was built for the study and simulated deposit material is used after measuring the physical property of the each material by shearing stress test. Much data was obtained for the analysis by the parameters change such as the different jet speed, different inner pressure and variable distance of the jet from the test rig surface. The experimental data was compared with the theoretical equation and most of the data matches well except some extreme cases.