• The Korean Journal of Nuclear Medicine
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• v.31 no.1
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• pp.30-35
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• 1997

It has been shown that both rest and stress myocardial perfusion imagings with technetium agents can be performed on the same day using two different doses injected within few hours. The purpose of this study was to compare the two protocols (stress-rest and rest-stress) in detecting coronary artery diseases. One hundred and sixty patients (101 males, 59 females, mean age $57{\pm}9$ years) and 120 patients (79 males, 41 females, mean age $59{\pm}10$ years) underwent stress-rest myocardial perfusion SPECT and rest-stress myocardial perfusion SPECT, respectively. All of them underwent both myocardial perfusion SPECT and coronary angiography within 1 month. A coronary stenosis was considered significant when it compromised the luminal diameter by ${\geq} 50%$. The chi square test was used to compare differences in sensitivity, specificity and accuracy between the two groups. The overall sensitivity, specificity and accuracy of stress-rest protocol were 99%, 35% and 68%, respectively. Those of rest-stress protocol were 96%, 47% and 78%, respectively. There was no difference between the two protocols in identifying individual diseased coronary artery branches. Therefore, one day stress-rest and rest-stress myocardial SPECT using $^{99m}Tc$ agents were comparable and were very sensitive tests in detecting coronary artery diseases.

• The Journal of Advanced Prosthodontics
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• v.13 no.1
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• pp.36-45
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• 2021

Purpose. To investigate the fracture resistance of monolithic CAD-CAM all-ceramic surveyed crowns with two different occlusal rest seat designs. Materials and Methods. Two maxillary first premolar were prepared for all-ceramic surveyed crowns with wide (2/3rd of buccolingual width of an unprepared tooth) or narrow (1/3rd of buccolingual width of an unprepared tooth) disto-occlusal rest seat (ORS) designs. Eighty monolithic CAD-CAM all-ceramic surveyed crowns were prepared and divided into 4 groups - Group CR, Composite resin material as a control; Group LDS, Lithium disilicate based material; Group ZIPS, zirconia-material (IPS ZirCAD); and Group ZLHT, zirconia- material (CeramillZolidht+). Crowns were cemented on an epoxy resin die with adhesive resin cement. The fracture resistance of crowns was tested with the universal machine. Univariate regression analysis was used. Results. The mean ± standard deviation of maximum failure force values varied from 3476.10 ± 285.97 N for the narrow ORS subgroup of group ZIPS to 687.89 ± 167.63 N for the wide ORS subgroup of group CR. The mean ± standard deviation of maximum force was 1075 ± 77.0 N for group CR, 1309.3 ± 283.9 N for group LDS, 3476.1 ± 285.97 N for group ZIPS, and 2666.7 ± 228.21 N for group ZLHT, with narrow occlusal rest seat design. The results of the intergroup comparison showed significant differences in fracture strength with various material groups and occlusal rest seat designs (P<.001). Conclusion. The zirconia-based all-ceramic surveyed crowns fractured at more than double the load of Lithium disilicate based crowns. The crowns with narrow base occlusal rest seat design had statistically significantly higher fracture resistance than surveyed crowns with wide occlusal rest seat design. The use of narrow occlusal rest seat design in CAD-CAM all ceramic surveyed crowns provides higher fracture resistance, and therefore narrow occlusal rest design can be used for providing esthetics with high strength.

• The Journal of the Korea Contents Association
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• v.19 no.9
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• pp.280-292
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• 2019

This study was carried out for the Centum Shinsegae Department Store, to grasp the indoor rest space and furniture design status, this study analyzes the characteristics of visitors' use behavior centered on furniture. The purpose of this study is to provide basic data for commercial rest space design by understanding the characteristics of resting space in commercial space and whether the furniture can support the behavior of visitors. The research method is to carry out on-site inspection, including the location of the rest space on each floor, the type and design characteristics of the furniture design, and the characteristics and patterns of the users on each were analyzed. The results of the study are as follows. As a result of analyzing the rest space and furniture, the furniture is brown, it has been provided with various designs such as fan-shaped, arched bench, sofa, chair type, and comfortable colors of lightness ranging from light gray to black, and appropriately supported the most common usage patterns.However, in the case of Shinsegae Department Store, it is necessary to consider the safety and convenience of the vulnerable groups.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.2
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• pp.397-407
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• 2017

This study investigated current status of rest area for drowsy drivers on the highways and drew the related issues to define specifications and design criteria regarding expressway rest area for drowsy drivers on the highways. Based on the investigation result, geometric structure specifications and improvement plans are suggested. The entry part of a rest area for drowsy drivers on the highways was divided into deceleration transition section, deceleration lane and entry connection road while the exit part was divided into exit connection road, acceleration lane and acceleration transition section. The optimum length was estimated by considering the main lane vehicle traveling speed, traveling speed at the beginning/end point of entry/exit connection roads, deceleration and acceleration. In addition, reasonable design criteria were suggested by dividing the parking section of rest area for drowsy drivers according to parking style and cross-section composition, and length of parking space and then considering the ratio of vehicles using rest area for drowsy drivers, the ratio of heavy vehicles, and the design speed within a rest area for drowsy drivers. It is believed that the suggested design criteria on rest area for drowsy drivers on the highways can be utilized in the future planning and maintenance of rest area for drowsy drivers. Additionally, the defined criteria on installing rest area for drowsy drivers on the highways will prevent traffic accidents in resting facilities and highways as well as improve usage and safety of them.

• Korean Journal of Adult Nursing
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• v.25 no.4
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• pp.400-408
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• 2013

Purpose: This study was conducted to examine the effects of bed side exercising on back pain and bleeding during absolute bed rest in patients who had received transcatheter arterial chemoembolization (TACE). Methods: A nonequivalent control group pretest-posttest design was used. A total 46 patients were sampled from a gastrointestinal unit of a urban general hospital in Seoul. The control group received 8 hours of bed rest and conservative care. The experimental group received 8 hours of bed rest and bed side exercising every one hour from the time having absolute bed rest for 3 hours after TACE. Results: The experimental group with bed side exercising experienced significantly less back pain compared to the control group. There was no significant difference in the incidence of bleeding complications between two groups. Conclusion: The results indicate that a bed side exercising is associated with a reduction of back pain and with no increased risk of bleeding complications in patients after TACE.

• Clinical and Experimental Reproductive Medicine
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• v.47 no.4
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• pp.319-322
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• 2020

Adrenal rest tumors are a rare extra-adrenal complication of congenital adrenal hyperplasia (CAH) in women although they are more commonly found in the testes of male patients with CAH. An ovarian adrenal rest tumor (OART) may coexist with CAH or imitate its symptoms without CAH. In this case report, we present the case of a woman with OART without CAH, whose main complaint was infertility and who had a baby after successful surgical treatment.

• Journal of the Korean housing association
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• v.10 no.2
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• pp.155-163
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• 1999

The purpose of this study was to investigate the residents' actual usage at three rest areas and three playgrounds in an apartment complex. This study was conducted with field study in J apartment complex in Incheon from August 14 to August 30, 1998. According to the results of the study, there were more users in playgrounds than in the rest areas. The rest area near the place for the elderly in the complex was used mainly by the elderly females. The playground located near the main entrance of the complex was frequently used because it is the biggest one in size and has an enough space for playing. Furthermore, the condition of shading areas by trees and buildings influenced the rate of use of the residents. Therefore, to increase the usage rate of rest areas and playgrounds, they should be located near to the places which have community amenities and should have accessible entrance for residents. Landscape design of the apartment complex should be done with the plot plan of the complex simultaneously. Moreover, the number and the kinds of trees to be planted in the apartment complex should be considered carefully.

• Journal of the Korea Furniture Society
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• v.23 no.2
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• pp.103-109
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• 2012

King Muryeong reungeseo Foot-rest on the subject of the king excavated a USB memory design. Foot-rest of the form and the meaning of patterns were expressed on a USB memory. Minds of ordinary people in these times communicator acts as an intermediary in the sky to give a sense of the king, such as Foot-rest patterns carved on the engraved turtle. Closely related to modern life, as cultural products associated with the computer by connecting supplies of products for some tourists, not only about reaching the wider public should focus on development. Meanwhile, the USB memory could not be seen in the case of natural wood material by using the age and the individual tastes of consumers represents USB memory into the merit of portability, necklaces pendants items for restoration, phone strap, key chain, etc. By combining the functionality increases. Meanwhile, on the basis of a practical item, the largest issue was the consumption of cultural products by maximizing the economic benefit of the community and at the same time a symbol of cultural heritage items have been transformed into the effectiveness of the national image enhancement is expected to be achieved.

• Proceedings of the Korea Society of Design Studies Conference
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• 2002.11b
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• pp.132-133
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• 2002

• Advances in aircraft and spacecraft science
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• v.7 no.5
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• pp.441-458
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• 2020

Rectangular-to-Ellipse Shape Transition (REST) inlets are a class of inward turning inlets designed for hypersonic flight. The aerodynamic design of REST inlets involves very complex flows and shock-wave patterns. These inlets are used in highly integrated propulsive systems. Often the design of these inlets may require many geometrical constraints at different cross-section. In present work a design approach for hypersonic inward-turning inlets, adapted for REST inlets, is coupled with a multi-objective optimization procedure. The automated procedure iterates on the parametric representation and on the numerical solution of a base flow from which the REST inlet is generated by using streamline tracing and shape transition algorithms. The typical design problem of optimizing the total pressure recovery and mass flow capture of the inlet is solved by the proposed procedure. The accuracy of the optimal solutions found is discussed and the performances of the designed REST inlets are investigated by means of fully 3-D Euler and 3-D RANS analyses.