• Proceedings of the Korea Concrete Institute Conference
• /
• 2003.05a
• /
• pp.481-486
• /
• 2003

This paper presents experimental study on long-term behavior of RC and SRC columns. Shrinkage and creep tests were performed for two types of concrete used in manufacturing RC and SRC column specimens. Also, long-term tests under sustained load were carried out for RC and SRC column specimens. Shrinkage functions and creep coefficients to optimally fit the corresponding data were obtained from regression analysis and the regression results, ACI and CEB- FIP 90 model were applied to analyse long-term behvavior of RC and SRC column specimens. Creep coefficients calculated from test data were lower than those predicted by ACI and CEB-FIP 90 models. Long-term analysis results for RC and SRC column specimens using the regression results were relatively more accurate than those obtained using the existing models.

• Asian review of World Histories
• /
• v.3 no.2
• /
• pp.171-200
• /
• 2015

At its simplest, this essay provides a narrative of migration in Asia since the arrival of Homo sapiens some 70,000 years ago. More fully, it presents the case for conducting long-term, world-historical interpretation for Asia with attention to multiple perspectives, which has become increasingly central to global historical analysis. Following an introductory articulation of the benefits of long-term interpretation, the second section presents a balance of three perspectives-empire, exchange, and migration-as frameworks for interpreting the Asian past. The third section presents further detail on migration in long-term Asian history. The concluding section identifies four changes in patterns of migration during the past two centuries and emphasizes the underlying importance of cross-community migration in long-term human biological and social evolution.

• Journal of the Korean Wood Science and Technology
• /
• v.17 no.4
• /
• pp.35-43
• /
• 1989

Nailed joints, which are commonly used in Wooden structures, transmit loads from one member to another and induce partial composite actions between members. Long-term loads induce creep slip in nailed joints and affect load sharing and partial composite action, which may reduce joint stiffness. Two theoretical viscous-viscoelastic models were developed for nailed joints to predict creep behavior under long-term variable loads. Those models were also used to predict stiffness changes under long-term variable loads. The stiffness of nailed joint is defined as a Secant modulus which is called the joint modulus or slip modulus. Input data for the models are the results of constant load tests under three different load levels. To verify the models, nailed joints were also tested under two long-term variable load functions. The predictions of the models were very close to the experimental data. Therefore, the theoretical viscous-viscoelastic models and procedures developed in this study can be applied to predict creep slip and the changes in joint moduli of nailed joints under long-term variable loads.

• 한국신재생에너지학회:학술대회논문집
• /
• 2008.10a
• /
• pp.278-281
• /
• 2008

In these days the installation of wind turbines or wind parks includes a high financial risk. So for the planning and the constructing of wind farms, long-term data of wind speed and wind direction is required. However, in most cases only few data are available at the designated places. Traditional Measure-Correlate-Predict (MCP) can extend this data by using data of nearby meteorological stations. But also Neural Networks can create such long-term predictions. The key issue of this paper is to demonstrate the possibility and the quality of predictions using Neural Networks. Thereto this paper compares the results of different MCP Models and Neural Networks for creating long-term data with various indexes.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.30 no.1 s.149
• /
• pp.176-186
• /
• 2006

The Purposes of this study are to examine the relationship benefit perception of fashion product consumers and how their benefit perception influences oil long-term relationship intention, and to construct a model of long-term relationship intention. The data was obtained from a survey of 540 females over 20years old living in seoul, Gyeonggi-do, and Gwangju-city during June in 2004. It was analyzed by frequency, reliability, factor analyses. The results of the survey were: 1 , Relationship benefits perceived by fashion product consumers were informational benefit, psychological benefit, special treatment benefit, economical benefit, and social benefit. 2. Relationship benefit influenced on satisfaction, trust, commitment, and commitment influenced on long-term relationship intention finally The findings of this study are expected to strengthen the necessity of applying customer relationship management for the fashion market.

• Journal of Global Scholars of Marketing Science
• /
• v.18 no.1
• /
• pp.81-114
• /
• 2008

The purpose of this study was to analyze how economic factors (economic satisfaction, economic conflict) and non-economic factors (non-economic satisfaction, non-economic conflict) differentially influence Korean retailers' long-term orientation with manufacturers, and how they are influenced by manufacturers' power sources under different levels of retailer dependence. After Korean retailers were divided into high and low dependence groups, path differences between the two groups were compared. The results suggested that manufacturers' coercive and non-coercive power sources do not differentially influence high and low dependence retailers' economic and non-economic satisfaction, and economic and non-economic conflict. However, the economic satisfaction of low dependence retailers more strongly affects their long-term orientation than that of high dependence retailers. Also, the economic conflict of highly dependent retailers more strongly affects their long-term orientation as compared to low dependence retailers. Finally, the impact of non-economic conflict negatively influences a long-term orientation for both retailer groups.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2015.05a
• /
• pp.243-244
• /
• 2015

This paper presents a Stochastic Long-Term Maintenance Costs Estimating Method for the Apartment Housing (SLCE). A simulation approach is used for generating the stochastic long-term maintenance cost, and it is based on the defined variability in repair cycle of the individual maintenance elemental within the process. SLCE provides the probability distribution of the budget required to maintain the apartment housing. A case study is presented to demonstrate and to validate the system.

• Journal of the Korean Society of Tobacco Science
• /
• v.23 no.1
• /
• pp.31-39
• /
• 2001

This study was carried out to investigate the changes of physical and chemical properties and the usability of long-term stored leaf tobacco. The physical chemical properties of the flue-cured and burley leaves produced in 1993, processed in 1994 were analysed from Nov. 1996 to Nov. 1999. The pH and moisture content in leaf decreased slowly until 4 years’storage after processing, while those of leaf changed little thereafter. However, total sugar content continuously decreased until 5 years after processing. The filling capacity increased and shatter resistance index decreased in long-term stored leaf. The sensory test, cilia stasis and the chemical components of cigarette smoke had no significant differences between short and long-term stored leaves. When the processed leaves were stored till 5 years after processing, there were no deteriorative effects on quality and usability of leaf tobacco. Therefore, it is considered that the processed leaf may be stored for 5 years or more under the inevitable situation.

• Clinical and Experimental Pediatrics
• /
• v.64 no.2
• /
• pp.49-59
• /
• 2021

Since the initial International Society of Heart Lung Transplantation registry was published in 1982, the number of pediatric heart transplantations has increased markedly, reaching a steady state of 500-550 transplantation annually and occupying up to 10% of total heart transplantations. Heart transplantation is considered an established therapeutic option for patients with end-stage heart disease. The long-term outcomes of pediatric heart transplantations were comparable to those of adults. Issues affecting long-term outcomes include acute cellular rejection, antibody-mediated rejection, cardiac allograft vasculopathy, infection, prolonged renal dysfunction, and malignancies such as posttransplant lymphoproliferative disorder. This article focuses on medical issues before pediatric heart transplantation, according to the Korean Network of Organ Sharing registry and as well as major problems such as graft rejection and cardiac allograft vasculopathy. To reduce graft failure rate and improve long-term outcomes, meticulous monitoring for rejection and medication compliance are also important, especially in adolescents.

• Journal of Haehwa Medicine
• /
• v.27 no.1
• /
• pp.1-8
• /
• 2018

Objectives : The purpose of this study was to analyze the status of inpatients in long-term care hospital and the satisfaction of Korean medical treatment. Methods : These analyzed data were collected from patients who were hospitalized in long-term care hospital in Sejong from Jan. 1. 2017 to Dec. 31. 2017. To analyze the status and the satisfaction of inpatients, we calculated the data of inpatients and conducted a survey. Results : Preference for acupuncture treatment was 95.6% and preference for numbers of Korean medical treatment more than two times per week was 40%. In addition, confidence in Korean medical treatment was 4.31, improvement after Korean medical treatment was 4.07 and general satisfaction was 4.58 with five-point scale. Conclusions : Most of the patients in long-term care hospital were satisfied with Korean medical treatment.