• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.8 no.4
• /
• pp.881-893
• /
• 2007

IT(Information Technology)-based industries have caused a recent digital revolution and the appearance of various types' information service, being largely expanded toward info-communication device company, info-communication service company, software company etc.. Therefore, the needs to evaluate the company value of IT business for M&A or liquidation are growing tremendously. Unlike other industries, however, IT industry has a short lift cycle and so it doesn't have not only a company value-evaluating model for general businesses but the objective one for IT companies yet. So, this thesis analyzes various value-evaluating technique and newly rising ROV. DCF, the change method of company's cash flow including tangible assets into future value, had been applied during the past industrialization economy era and has been persuasively applied to the present. However, the DCF valuation has no option but to make many mistakes because IT companies have more intangible assets than tangible assets. Accordingly, it is ROV, recognized as the new method of evaluating companies' various options normally and quantitatively, that is brought up recently. But the evaluation on the companies' various options is too subjective and theoretical up to now and due to the lack of objective ground and options, it's not possible to be applied to reality. In this thesis, it is found that ROV is more accurate than DCF, comparing DCF and ROV through four examples. As the options applied to ROV are excessively limited, we tried to develop ROV into a new method by deriving five invisible value factors within IT companies. Therefore, on this occasion, we should set up the basic valuation methods on IT companies and should research and develop an effective and various valuation methods suitable to each company like an internet-based company, a S/W developing enterprise, a network-related company among IT companies.

• Journal of Korean Ophthalmic Optics Society
• /
• v.13 no.4
• /
• pp.19-24
• /
• 2008

Purpose: The purpose of this research is to induce domestic eyewear industry to invest in research and development of eyewear manufacturing technology and eyewear design. Methods: Analysis of Industrial Rights using data issued by Korea Intellectual Property Office and search results by 'Kipris' (Korea Intellectual Property Rights Information Service). Results: A number of Industrial Rights Application related to eyewear of eyewear industry has rapidly increased since 1980's. The ratio of Patent and Design Right applications related to eyewear by foreigner has continually decreased, 55%, 32.9% in 1980's, 40%, 22% in 1990's and 27%, 13.9% in 2000's. This shows domestic eyewear industry has developed technology and design on eyewear more and more. But numbers of Design Right applications in 1990's were about 60 in a year and those in 2000's were about 70 in a year. This may explain a few eyewear company have applied for Design Right. Conclusions: It is evident that domestic eyewear industry make an more effort and investment to develop eyewear manufacturing technology and design, but not enough. Actually, we don't know exactly how they develop and how much they invest. Now we need to research problems what they have and environments what they face.

• Journal of Internet Computing and Services
• /
• v.9 no.5
• /
• pp.153-163
• /
• 2008

Almost literature has so far proposed the modifications to IEEE 802.11 DCF MAC protocol to improve system throughput and average delay. Jitter(variance in packet delays) is, however, considered as an important QoS parameter for real-time streaming service which is popularized increasingly. Unfortunately, legacy access protocol for WLAN can't support the jitter. This paper proposes two schemes modifying the DCF MAC protocol to reduce the average value of jitter for multimedia frames arrived at received nodes. The one scheme, referred to as DCW-DCF(Decreasing Contention Window-DCF), reduces CW(Contention Window) size by half whenever a transmitted frame collided against other frames and back-off happens. Also, it increase initial CW size according as the link utilization and the collision probability increase. The other scheme, referred to as D-DIFS(Differential-DIFS), assigns different values to DIFS. That is, the DIFS interval is deceased as the number of back-off for a frame increases. In this paper, the two schemes are evaluated through simulation using ns2 and simulation results show that the proposed schemes are effective for improving the jitter property of standard WLAN.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.24 no.2
• /
• pp.190-200
• /
• 2018

Purpose: The purpose of this study was to identify the level of perception of safety risk factors and the degree of performance of safety nursing activities in order to develop an education program to improve the safety of patients. Methods: The subjects were 217 nurses from 3 university hospitals in Incheon. Data were collected with structured questionnaires and analyzed using descriptive analysis, t-test, and ANOVA using SPSS 22.0. Results: The level of perception of patient's safety risk factors and safety care activities was 2.93 and 4.68, respectively. Perception of patient safety risk factors which belonging to the risk type of therapeutic devices, equipment, service and infrastructure all scored below average; also in addition, behavior, performance, and violence risk type and work system, information and communication risk type showed relatively low perception levels. Safety nursing activities showed a low level of performance in accurate communication among medical teams, management of fire and disaster, security management, use of restraints, identification of patients, and correct performance of operations and procedures. Conclusion: Based on these results, it is necessary to improve the safety of patients by taking proper management measures along with education.

• Journal of Internet Computing and Services
• /
• v.9 no.6
• /
• pp.89-97
• /
• 2008

Recently, many organizations such as companies or institutions have demanded induction of very large-scale workflow management system in order to process a large number of business-instances. Workflow-related vendors have focused on physical extension of workflow engines based on device-level clustering, so as to provide very large-scale workflow services. Performance improvement of workflow engine by simple physical-connection among computer systems which don't consider logical-level software architecture lead to wastes of time and cost for construction of very large-scale workflow service environment. In this paper, we propose methodology for performance improvement based on logical software architectures of workflow engine. We also evaluate scalable performance between workflow engines using the activity instance based architecture and workcase based architecture, our proposed architecture. Through analysis of this test's result, we can observe that software architectures to be applied on a workflow engine have an effect on scalable performance.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.41 no.4
• /
• pp.289-295
• /
• 2005

This study is intended to provide navigator with specific information necessary to assist in the avoidance of collision and in operation of ships to evaluate the manoeuvrability of own ship. The actual manoeuvering characteristics of ship can be adequately judged from the results of typical ship trials manoeuvres. Author carried out sea trials based full scale for turning test, zig-zag test, spiral tests and crash-stop test at actual sea going condition. The turning circle manoeuvres were performed on starboard and port sides with $35^{\circ}$ rudder angle at the service speed, and Zig-zag procedures were performed on both sides with $10^{\circ}$ and $20^{\circ}$ rudder angle respectively. Spiral tests were carried out on the both sides and crash stop test was also carried out. The results from tests could be compared directly with the standards of manoeuverability of IMO and consequently the manoeuvring qualities of the ship is fully satisfied with its.

• Journal of Korean Public Health Nursing
• /
• v.25 no.2
• /
• pp.221-232
• /
• 2011

Purpose: The study sought to provide basic information for North Korean defectors (Sae-Tu-Min) by studying the quality of life(QoL) based on their general characteristics and health problems. Methods: The targeted subjects were 1400 North Korean settlers who were receiving settlement service by Korean National Red Cross after finishing their training at Hanawon in 2005. The data was collected from August to October in 2007. The QoL was assessed by Medical Outcomes Study Short Form-36. Collected data were analyzed by ANOVA and t-test with SPSS win 15.0 program. Result: The majority of the 466 subjects were female(77.9%). The average age was 36.8 years, 52.8% lived alone, and 64.0% were unemployed. The average QoL score of the group was $62.4{\pm}18.4$, which was markedly lower in terms of social, physical and mental health compared to the scores of immigrants to South Korea from other countries. The score was the highest for physical ability and the lowest for general health. Influential socio-demographic factors to QoL were gender, age, education, religion, annual salary, occupation, and life insurance. Employed in the subject group showed higher level of QoL on eight categories than unemployed. Concerning health problems that detracted from QoL, 18.5% of the subjects were aware they suffered from anemia and 8.8% of them recognized they suffered from attention deficits. Conclusion: The health conditions of the North Korean settlers had improved since they settled in South Korea, but their QoL was lower than other immigrants. Various programs to maintain and promote the health of North Korean settlers would be useful.

• Journal of the Korean Dietetic Association
• /
• v.2 no.1
• /
• pp.92-104
• /
• 1996

Contract Managed foodservice has been expanded rapidly in university foodservice operations. The purposes of this study were to examine customers and administrators' preference concerning operation format, the decision making components for operation format, and administrators' attitudes concerning contract managed and self-operated foodservice. Two types of questionnaires were developed and implemented. Customer and administrator's questionnaires were distributed to 900 university students and 27 administrators respectively, and 831 customers and 24 administrators were responded with a response rate of 92.3% and 88.8% respectively. Statistical data analysis was completed using the SPSS programs for descriptive analysis, $x^2$-test, ANOVA, and T-test. The results of this study can be summarized as follows 1. In deciding foodservice operation format, the components customers considered were the ability to provide variety of meal items, aesthetic and safe food(62.6%), the ability to provide a food with competetive low price(22.1%), and the ability to provide adequate service and nutrition information. On the contrary, the components administrators considered were the ability to provide variety of meal items, aesthetic and safe food(66.7%), the ability to relieve administrators of managerial burden of the foodservice operation(12.5%), and the ability to invest facility(8.3%). 2. The average score of attitude on contracted and self-operated management activities were 3.41, 3.10 respectively. University administrators evaluated that contractors performed financial management activities more effectively. 3. University administrators with contracted or self-operated foodservice favored their own current operation format.

• Proceeding of Spring/Autumn Annual Conference of KHA
• /
• 2005.11a
• /
• pp.73-77
• /
• 2005

To design senior housing that support residents' health is one of the comtemporary issues in Korea. As elderly people became more healthful and reach, people became interested in the health and health promotion. This trend encouraged this research study. The objectives of this study are: to analyze the middle aged people's opinions and behaviors related to health issues, and to suggest design considerations for senior housing. The survey used questionnaire from 476 residents living in Seoul and Gyeong-Gi area. The analysis used descriptive statistics, one-way anova and t-test. Primary findings are as follows: (1) Most of the respondents considered that their health state is 'good' and mental health is more important than physical health. (2) Many people exercise regularly for the promotion of health at a gym. (3) Results show that social relationship effect on health, and dietary life and walking medical examination account highly. (4) As the respondents are higher income and education level, the health-related behavior is more actively. Moreover the respondents who are women feel a great interest about health issues. These results suggest directions for planning of the senior housing. (1) Planning the space for the health-promoting behavior in the house or support a private gym-not a local facilities-. (2) Service for the information related health issues - medical examination, news of the health issues (3) Support the maintenance a good - social relationship (4) Consideration the space with health-related behavior like walking and dietary-life. The senior housing can reflect the health-related opinions and support health-related behavior of the elderly people.

• Structural Engineering and Mechanics
• /
• v.81 no.3
• /
• pp.293-303
• /
• 2022

As infrastructure ages and traffic load increases, serious public concerns have arisen for the well-being of bridges. The current health monitoring practice focuses on large-scale bridges rather than short span bridges. However, it is critical that more attention should be given to these behind-the-scene bridges. The relevant information about the construction methods and as-built properties are most likely missing. Additionally, since the condition of a bridge has unavoidably changed during service, due to weathering and deterioration, the material properties and boundary conditions would also have changed since its construction. Therefore, it is not appropriate to continue using the design values of the bridge parameters when undertaking any analysis to evaluate bridge performance. It is imperative to update the model, using finite element (FE) analysis to reflect the current structural condition. In this study, a FE model is established to simulate a concrete culvert bridge in New South Wales, Australia. That model, however, contains a number of parameter uncertainties that would compromise the accuracy of analytical results. The model is therefore updated with a neural network (NN) optimisation algorithm incorporating Monte Carlo (MC) simulation to minimise the uncertainties in parameters. The modal frequency and strain responses produced by the updated FE model are compared with the frequency and strain values on-site measured by sensors. The outcome indicates that the NN model updating incorporating MC simulation is a feasible and robust optimisation method for updating numerical models so as to minimise the difference between numerical models and their real-world counterparts.