• Journal of the Korea Concrete Institute
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• v.18 no.1 s.91
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• pp.3-12
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• 2006

The behavior of concrete structures subject to fire is complex, depending on many factors. The factors usually considered in research include the level and endurance of temperatures in concrete and reinforcing bars, the mechanical properties of the steel and concrete, moisture contents, cover thickness, existence of eccentricity, and member geometry among others. Although there are a few sophisticated numerical models which can trace the effects of these important parameters on the residual capacity of reinforced concrete columns damaged by fire, practical predictive formulas are in need for rapid yet reasonable assessment in practice. The practical formulas are developed in this study for fire-damaged normal strength reinforced concrete square columns, which can approximate the predictions of those sophisticated numerical models with ease in use. The formulas take into account the effects of exposure time to fire, concrete strength, reinforcement ratio and sectional area. The developed formulas are seen to correlate with the predictions of numerical model in a reasonable agreement. Some examples are also presented in determining the residual strength, safety and additionally needed strengths for a fire-damaged reinforced concrete column.

• Journal of Korean Society of Transportation
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• v.35 no.1
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• pp.50-62
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• 2017

As the use of private cars increases along with the technological advancement in the automobile industries and their capabilities to supply, a wide range of issues are followed including the increase in traffic congestion costs, pavement damages and more. In spite of consistent effort to resolve such urban traffic problems, the modal share rate of private cars continuously increases, thus it is becoming more important to explore the ways to enable drivers to take reasonable measures, in self-motivated manner, by taking part of the transportation demand management policy rather than to rely on the strict enforcement of control policy. Considering that the urban transportation infrastructures are in much better shape than before, it is necessary to implement Mobility Management (MM) that induces reasonable usage of private cars by promoting the change in one's consciousness and behavior through communication. Hence, the research studies the factors that influence the mobility through the survey targeting the citizens of Busan on their awareness on the former transportation demand management policy, to explore the ways to motivate the citizens' involvement in reducing the use of private cars as a measure of Mobility Management.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.05a
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• pp.96-100
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• 2004

In the ship building industry various problems of erection is counterfeited due to formation of bottle necks in the block erection flow pattern This kind of problems cause accumulated problems in real-time erection right on the floor, When such a problem is approached, a support data of the entire erection sequence should be available, Here planning is done by reasoning about the future events in order to verify the existence of a reasonable series of actions to accomplish a goal. This technique helps in achieving benefits like handling search complications, in resolving goal conflicts and anticipation of bottleneck formation well in advance to take necessary countermeasures and boosts the decision support system, The data is being evaluated and an anticipatory function is to be developed This function is quite relevant in day to day planning operation. The system updates database with rearrangement of off-critical blocks in the erection sequence diagram, As a result of such a system, planners can foresee months ahead and can effectively make decisions regarding the control of loads on the man, machine and work flow pattern, culminating to an efficient load management. Such a foreseeing concept helps us in eliminating backtracking related adjustment which is less efficient compared to the look-ahead concept. An attempt is made to develop a computer program to update the database of block arrangement pattern based on heuristic formulation.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.45 no.4
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• pp.199-206
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• 2019

Objectives: In mandibular edentulism, the treatment option with a two-interforaminal implant-retained bridge and a removable partial denture is rarely evaluated in literature. The aim of this in vitro study was to evaluate the stress distribution of this treatment option by comparing it with traditional treatment options with interforaminal implants in the edentulous mandible. Materials and Methods: Two interforaminal implants were placed in a formalin-fixed cadaver mandible, and overdentures with three different types of attachments were fabricated: (1) two ball attachments and an overdenture, (2) a Dolder bar and an overdenture, and (3) screw-retained two-implant inter-canine porcelain fused to a metal bridge and an implant-assisted removable denture (IARD) with precision attachments. Three biting conditions were generated for each denture type, and the strains were documented under vertical loading of 100 N. Results: The calculated strain values from measured strains in all measurement sites and loading conditions for the screw-retained two-implant intercanine porcelain fused to a metal bridge and a cast framework partial denture with precision attachments situation were lower than in the other scenarios (P<0.05). Conclusion: Within the limitations of the present study, it can be concluded that an IARD may be a reasonable and valuable alternative to ball attachments or a bar in two interforaminal implants, especially when the patients prefer to be able to show their teeth even when they take out their removable dentures.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.50 no.1
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• pp.13-20
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• 2022

Aircraft weight is an important factor affecting performance and fuel efficiency. In the conceptual design stage of the aircraft, the process of balancing cost and weight is performed using empirical formulas such as fuel consumption cost per weight in estimating element weight. In addition, when an airline operates an aircraft, it promotes fuel efficiency improvement, fuel saving and carbon reduction through weight management activities. The relationship between changes in aircraft weight and changes in fuel consumption is called the cost of weight, and the cost of weight is used to evaluate the effect of adding or reducing weight to an aircraft on fuel consumption. In this study, the problems of the existing cost of weight calculation method are identified, and a new cost of weight calculation method is introduced to solve the problem. Using Breguet's Range Formula and actual flight data of the A350-900 aircraft, two weight costs are calculated based on take-off weight and landing weight. In conclusion, it was suggested that it is reasonable to use the cost of weight based on the take-off weight and the landing weight for other purposes. In particular, the cost of weight based on the landing weight can be used as an empirical formula for estimating element weight and optimizing cost and weight in the conceptual design stage of similar aircraft.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.69
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• pp.327-348
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• 2016

Under the Korean legal system, as an actual carrier is not the contractual party to the contract for carriage of goods by sea, it has been tortiously liable for the damage to, or loss of cargo, should there be the negligence by its part. However, the Rotterdam Rules introduces a revolutionary liability regime for the actual carrier. According to the Rotterdam Rules, the liability of the actual carrier is same with that of a contractual carrier with the result that a shipper is entitled to bring the direct action to the actual carrier, as well as the contractual carrier on the same basis. Nevertheless, it is expected to take long time for the new approach in respect of actual carrier's liability to be confirmed by many countries, and furthermore most of shipping countries including Korea still adopt the Hague-Vis by Rules where the shipper is not allowed to bring the direct action to the actual carrier. This study reviews on whether or not the alteration of actual carrier's liability based on Rotterdam Rules would be reasonable, considering the current Korean legal system. Furthermore, this study, whilst recognizing that the overall introduction of the new liability regime is somewhat premature, suggests the imposition of contractual liability to the actual carrier from a long-term perspective. Having in mind that the article 809 of the Korean Commercial Act allows the shipper to bring the direct action to the shipowner only in the case that a time charterer is the contractual carrier, this study explores a method to apply the contractual liability to the actual carrier in the case that a slot charterer or freight forwarder is the contractual carrier, in order to establish the uniform liability system.

• Journal of Society of Preventive Korean Medicine
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• v.18 no.3
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• pp.105-115
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• 2014

Objective : Traditional medicine (TM) has been playing its role in national healthcare system and it is taken as complementary and alternative medicine (CAM) from the viewpoint of modern Western medicine. In the UK, not a few practitioners of Traditional Chinese Medicine (TCM) are working as CAM practitioners using herbal medicine and acupuncture therapy. Cases of dispute in the TCM practice are not rare these days because patients who take TCM service are increasing by year. Method : In the UK, dispute cases of the Traditional Medicine of East Asia can be found these days, however, it is hard to find a reported court case. A medical dispute case of TCM will be analysed to see the legal management and the resolving principle in the alternative medicine practice with some cases of Korean Medicine (KM) being discussed. Results : The usual pattern of clinical negligence can be discussed from the points of a duty of care, breach of that duty by negligence, and the harm to the patient from that breach of duty. The judge followed this procedure In this case to discuss the claims. The department of health proposed to introduce regulation to provide the reasonable quality in TCM practice, and the governmental system would be essential to regulate both the TCM practice and practitioners. Conclusion : The dispute case of traditional Chinese herbal medicine (TCHM) practice is important for the clinical negligence in TCHM practice. Judging the negligence of a TCHM practitioner involves the conventional negligence principle in tort law, and the TCHM practitioners are required to keep up with the up-to-date information on the related medical specialty. The reasoning is almost the same as that shown in the court case of Korea. The TCHM practice in the UK needs to be under the regulation by the government. The standard of care we expect of a TCHM practitioner is a further matter to discuss from the healthcare and social viewpoints.

• The Journal of Korean Academic Society of Nursing Education
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• v.4 no.2
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• pp.280-295
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• 1998

This study examines attitudes among nursing student, attitudes that give direction in life and effect the decision-making process when seeking employment. The exigency of which derives from the need to design a proper guidance program to assist students in their search for employment. Data was collected from a survey conducted between November 20 and November 25, 1995, the respondants of which were 120 nursing students without jobs. The data was analyzed by examining frequency, percentage, average, Chi-square, one-way ANOVA and t-test through an SPSS $PC^+$ program. The results of the study can be summarized as follows : 1) There are positive relationship between a student's academic major and employment(So responded 84.3% of the subjects with only 2.5% claiming that his major didn't matter). 2) Students believe that 'good jobs' are secured through aptitude. 'Good jobs' are seen as ones which develop an individuals abilities and which offer the opportunity for advancement. However they do not believe that 'good Jobs' contribute to society 3) Students have not been supplied the proper guidance and information necessary for finding employment. The student's life research institude, professor and assistants provide Insufficient information and counseling. Personal goals are decisive factors in determining what direction a student may take as well as the kind of employment he will seek. However, advice from parents, siblings, friends, alumni, professors, assistants and counselors is also considered. 4) Students do not think it reasonable to base their career decisions on one factor only(33.9% responded that aptitude and personal interests were the most important factor, and 14.9% that income was the key determinant). 5) Location and size of the hospital are important considerations when choosing a job. There is a preference for larger hospitals. 6) A lack of stability and few opportunities for advancement are perceived as the primary reasons for the possibility of leaving one's job.

• Korean Journal of Human Ecology
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• v.16 no.4
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• pp.783-800
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• 2007

This study examined the evaluation on the consumers' voluntary anti-sites on on-line from the people concerned, such as the people of an enterprise, a consumer organization, and the consumer. We collected the data using in-depth interview of qualitative analysis. The in-depth interviews were carried out for about two hours in each respondent. Total 15 respondents, 5 in each part of three parts such as an enterprise, a consumer organization, and the consumer, were answered a interview. The data was analysed by content analysis method. As the result of this study, the people concerned to enterprises answered that anti-sites helped the enterprises through the objective and the constructive criticism. The consumers participating in the anti-sites also answered that the existence of anti-sites helped the companies to know the complaint and the dissatisfaction with their goods or services. We suggest the followings for the desirable consumers' voluntary anti-sites through this study. First, the companies need to recognize that the anti-sites help the companies because the anti-sites give the companies the information of improving the product and the corporate management. Second, people concerned to the consumer organizations need to take a neutral role so that the consumer members of anti-sites demand a proper compensation to the companies and receive the reasonable compensation. Third, the anti-sites' managers should give information to the consumer members of the anti-sites continuously, operate the anti-sites actively such as answering a question and managing their members. Fourth, the consumer members of anti-sites should have active attitude in participating in an anti-sites from exchanging various information to uploading their information.

• Journal of Sericultural and Entomological Science
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• v.13 no.1
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• pp.73-78
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• 1971

The purpose of this study is to find out the method of conditioned weight test by which the dealing weight of raw silk can be calculated from true fiber in order to do the fair trading. The results of this study were as follows. 1. It is more reasonable than the current test that conditioned weight as a dealing weigh can be calculated by boil-off and moisture regain which is a percentage of boil-on and moisture regain to net weight. Because the boil-off and moisture regain can show directly the amount of true fiber and reproductibility in raw silk. In this study the boil-off and moisture regain is to take dry weight after boiling-off from net weight. 2. To calculate the conditioned weight from boil-of and moisture regain it would be proper that the standard additional ratio is 44 per cent of dry weight after boiling-off. 3. Boil-of percent of the sizing sample skein used in the size test did not show a statistical significance comparing with the boil-off percent of sample skeins (24 skeins) which may represent that of a lot. To observe this result boil-off percent of the sizing sample skein may represent that of a lot. 4. In Korea if conditioned weight test substitute for test of boil-off and moisture regain, we make a profit of two billion won in a year at the current market-price.