• Archives of Plastic Surgery
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• 제34권3호
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• pp.377-382
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• 2007

Purpose: Hook nail deformity is caused by inadequately supported nail bed due to loss of distal phalanx or lack of soft tissue, resulting in a claw-like nail form. A composite graft from the foot bencath the nail bed gives adequate restoration of tip pulp. Methods: From September of 1999 to March of 2004, six patients were treated for hook nail deformity and monitored for long term follow up. Donor sites were the lateral side of the big toe or instep area of the foot. We examined cosmetic appearance and nail hooking and sensory test. The curved nail was measured by the picture of before and after surgery. Results: In all cases, composite grafts were well taken, and hook nail deformities were corrected. The curved nail of the 4 patients after surgery were improved to average $28.7^{\circ}$ from average $55.2^{\circ}$ before surgery. The static two point discrimination average was 6.5mm and the moving two point discrimination average was 5.8mm in the sensory test. Conclusion: Composite graft taken from foot supports the nail bed with the tissue closely resembling the fingertip tissue, making it possible for anatomical and histological rebuilding of fingertip.

• 한국물환경학회지
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• 제25권2호
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• pp.306-310
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• 2009

Packed-bed reactor for removing ammonia was tested at different loading rates. Nitrifiers for ammonia removing was encapsulated in gel media which consisted of polyethlene glycol, alginate and activated carbon. The removal efficiency was nearly 100% when ammonia loading was $12g/m^3/hr$, and the maximum elimination capacity (EC) achieved on this study was $18g/m^3/hr$. The initial microbial portion of nitrifiers in the media was about 82% and it was increased to more than 90% at the end of the operation. Short-term shock loading test was carried out to survey the stability of the media. The inlet loading rates were varied from 2 to $20g/m^3/hr$. The packed-bed reactor overcame the shock loading i.e. removal efficiency recovered rapidly from about 80% to almost 100% within 6 hrs. The results of Live/Dead cell test showed that nitrifiers maintained there activity in the encapsulated media during the test and also against ammonia shock load.

• 한국ITS학회 논문지
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• 제9권5호
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• pp.1-13
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• 2010

본 논문은 금융결제원 코레일네트웍스 하이플러스카드가 개발한 전국호환 교통카드 시스템과 삼성SDS가 개발한 호환 교통정보집계시스템을 연계하여 테스트베드를 구축하고 운영한 결과를 보여준다. 광주광역시에서 시내버스 4개 노선, 지하철 1호선 20개 역, 철도 2개 역, 호남고속도로 2개 구간에 전국호환 교통시스템을 구축하였고, 서울대 IC카드센터에 호환교통정보집계시스템을 구축하였다. 그리고 480명의 테스트요원에게 전국호환 테스트 카드를 배포하여 약 6개월 동안 테스트베드를 운영하였다. 이는 전국호환 교통카드 시스템과 호환 교통정보집계시스템에 적용한 전국호환 표준 기술이 실제로 전국 모든 대중교통수단에 적용 가능함과 호환성, 정확도, 안전성, 신뢰성 등을 검증하기 위함이다. 테스트요원이 테스트카드를 지불단말기에 접촉시키면, 지불단말기 안에 있는 지불SAM과 연동하여 거래를 수행하고, 거래 내역을 정산시스템에 송신하여 정산하며, 호환 교통정보집계시스템에 일부 거래 내역을 전송하여 집계한다. 테스트베드를 통해 이러한 과정을 살펴보고, 전국호환 표준 기술 적용 시스템 운영 중 나타나는 문제점이나 개선사항을 도출하여 이를 해결하였다. 그리고 테스트요원의 설문조사와 민원 사항을 통해 테스트베드의 성공적인 결과를 입증하였다.

• 한국전산구조공학회논문집
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• 제33권2호
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• pp.113-119
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• 2020

사물인터넷 기반의 센서네트워크는 저렴한 비용으로 효율적으로 교량 등의 시설물 유지관리에 적용할 수 있는 한 방안이다. 본 연구에서는 사물인터넷 통신의 하나인, LoRa LPWAN 기반으로 교량 구조건전성모니터링을 위한 시스템을 개발하기 위해서 케이블 장력 모니터링을 위한 센서보드, 기존 계측 센서들과 함께 센서네트워크를 구축하기 위한 DAQ 보드, 데이터들 처리하고 LoRa 통신을 위한 스마트센서노드를 설계 및 제작하였으며 모니터링을 위한 센서네트워크를 구축하였다. 또한 본 시스템의 성능검증을 위해 영광대교에 Test Bed를 구축하여 교량 구조건전성 모니터링을 위한 센서네트워크에 적용가능성 여부를 살펴보았다. Test Bed 검증 결과 LoRa LPWAN 기반 센서네트워크는 데이터 전송률, 정확도, 경제성면에서 교량 구조 건전성 모니터링의 기술 중에 하나로 적용될 수 있으며, 향후 교량구조물 뿐만 아니라 다양한 공공기반 시설물에 유지관리를 위한 시스템으로 보급될 수 있기를 기대한다.

• 성인간호학회지
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• 제20권4호
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• pp.664-673
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• 2008

Purpose: The purpose of this study was to identify the effect of meridian acupressure on constipation in bed-ridden aged inpatients. Methods: The research design was a non-synchronized non-equivalent control group pretest-posttest design. The subjects consisted of 28 bed-ridden aged inpatients. Meridian acupressure was administered to the experimental group at 30 minutes before breakfast every morning for two weeks. Each meridian was pressured for 10 seconds, 10 times. The frequency of defecation and stool form were examined every day. The data was analyzed by the $x^2$-test, Fisher's exact test, t-test and repeated measures ANOVA. Results: The experimental group given Meridian Acupressure had a higher frequency of defecation(F = 59.372, p = .000) and normal stool(F = 46.046, p = .000) than the control group. Conclusion: The results suggest that Meridian Acupressure was an effective method for the relief of constipation for bed-ridden aged inpatients. A follow -up research is needed to validate that other patients with constipation can use the Meridian Acupressure as a non-invasive nursing intervention instead of a laxative or enema.

• 임상간호연구
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• 제27권2호
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• pp.179-186
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• 2021

Purpose: The purpose of our study was to identify the bleeding risk factors and to validate the safety of shortening the bed rest time after bone marrow examination in pediatric hemato-oncologic patients. Methods: From July 2019 to September 2020, 145 patients were enrolled from a single center. Medical records were reviewed retrospectively. Descriptive statistics were presented, and the data were analyzed using 𝑥²-test, Fisher's exact test, and a logistic regression. Results: After two hours of bed rest, most of the patients (91.7%) did not have bleeding complications, and only 8.3% of the patients had a minor bleeding. The rate of major bleeding complications, including hematoma, retroperitoneal hemorrhage rate was zero. The bleeding complications was frequently found on bilateral procedures than unilateral procedures and the difference were statistically significant (p<.05). Conclusion: Two hours of bed rest time after bone marrow examination could be safe and adequate in pediatric hemato-oncologic patients.

• 대한간호
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• 제36권2호
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• pp.73-83
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• 1997

Bed rest is recommended to prevent postlumbar puncture headaches(PLPHA), but the period of bed rest varies in the literature from 6 hours to 24 hours. In clinical practice the period of bed rest varies but nursing methods for adults and children have little difference. In Seoul National University Hospital, children have been given at least 6 hours bed rest after a lumbar puncture. Pediatric oncology patients require a lumbar puncture for an initial diagnosis, follow up treatment or administration of chemotherapeutic agent. But it is difficult for young children to lie supine or to refrain from their usual activities in any way, and unpleasant problems related to a shortage of beds often occurs during discharge or in an outpatient setting. The purpose of this study is to substantiate the preventive effect of PLPHA by the period of bed rest, to identify the other factors that influence PLPHA, and to use the nursing methods proper to children. The subjects were 65 children, ages 1-17, undergoing treatment in the children's cancer center at SNUCH during the period June 1, 1995, to Aug. 31, 1995. The team nurses asked questions about PLPHA of the parents and children in order to fill out a questionnaire. The data were evaluated by percent, t-test, Chi-square test and Mann-Whitney U test. Result; 1. There was no significant difference relating the bed rest time spent to the occurrence of postspinal headaches (t-test). 2. There was a significant risk of PLPHA in the children who were irritable before procedure and/or had experienced previous PLPHA(p<0.05, ${x^2}-test$). 3. The following factors were not found to be associated with increased risk of PLPHA: previous puncture experience, giving analgesics, the choice of puncturist, inpatient/outpatient status, gauge of needle, purpose, the amount of CSF removed, gender, diagnosis, the number of peripheral WBCs, previous lumbago experience after LP, position after bed rest, age, the number of aural puncture at the time. A longer period of bed rest is unlikely to be more effective to prevent PLPHA and seems impractical. A shorter period will save time and effort. Perhaps it will also allay some of the fears which surround LP. So 1 hour bed rest after LP is suggested and nursing methods for emotional support should be investigated to reduce PLPH.

• 한국정밀공학회지
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• 제31권5호
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• pp.403-409
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• 2014

For ground-based telescope application, the performance assessment of tip-tilt actuator is important because the optical quality of telescope depends upon the windshake compensation ability of the fast steering secondary mirror. But it is difficult to measure the performance characteristics of the actuators due to the large size mirror and test facilities including the vacuum support and structural frame. In this paper, the full-scale tip-tilt test bed for the large size secondary mirror with diameter of 1m is built and the several tests are performed including the range, resolution and frequency response function. From the measurement results, it is shown that the tip-tilt actuator can successfully compensate the windshake with frequency of maximum 12 Hz and be a candidate for the Giant Magellan Telescope.

• 한국세라믹학회지
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• 제54권5호
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• pp.380-387
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• 2017

In this study, unstable CaO was converted into a stable Ca compound by using carbonation in a circulating fluidized bed boiler of fly ash to confirm material usability as cement admixture; also undertaken was carbonation test and mortar to examine chemical and physical change by measuring absorption rate and compressive strength. To investigate the chemical properties of circulating fluidized bed boiler fly ash, XRD and TG-DTA were used to determine how the properties of the reaction product change quantitatively during carbonation. In order to stabilize CaO, carbonation of CaO is considered to be the most desirable process. This is because $CaCO_3$, which is a Ca compound, was produced by carbonate reaction of unstable CaO, and decrease of the absorption rate and improvement of the compressive strength were observed when the carbonated fly ash was replaced with cement.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.1285-1289
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• 2008

Increasing the flood control capacity's link that is enforcing to existing dam by unusual change of weather, While build planing construction by exiting spillway of tunnel type to dam, could know that part bed rock is formed as is different with design. Grasped topography of research area and geology state to definite distribution aspect of different bed rock, Place that achieved Surface geological Survey and correct Survey is difficult in some section enforced Electrical resistivity dipole-dipole investigation. Grasped stratigraphy distribution confirmation and fracture or weathering zone making out siding 2D-Resistivity Electrical resistivity diagram and Reverse analysis diagram, examining closely soil weathered rock rock's distribution state, established stability countermeasure plan