• 대한기계학회논문집B
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• 제22권7호
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• pp.937-945
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• 1998

The purpose of this paper is to investigate the relationship between pressure recovery and turbulent characteristic value of velocity and pressure, in the case where a swirling flow streams into a conical diffuser. The results of both measurements of the wall pressure fluctuation and velocity fluctuation revealed them to role the large part of the total pressure loss of the flow. The cause of the fluctuation of flow was showed to be the flow separation at the inlet of diffuser at low intensity of swirl, but the flow of diffuser center was instable at high intensity of swirl. The static pressure recovery depends strongly on the magnitude of the turbulent energy in the diffuser, and that this magnitude of the turbulent energy varies as the intensity of swirl at the diffuser inlet.

• Journal of Power Electronics
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• 제2권3호
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• pp.189-198
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• 2002

New concept of energy recovery for plasma display panel (PDP) Is proposed. Different from conventional LC resonant sustaining drivers, the current built up before inverting the polarity of the panel electrodes is utilized to change the panel Polarity together with energy Previously charged in Panel capacitance. This operation Provides zero -voltage-switching of switches and reduction of EMI by rejecting the surge current when the sustain switches are turned on. The build-up current helps to reduce transition time of panel polarity and may produce more stable light waveforms. This method shows a desirable characteristic that the circuit loss is similar to that of series resonant type energy recovery circuit which is very effective method.

• 한국전기전자재료학회논문지
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• 제15권2호
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• pp.133-140
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• 2002

This paper aims to investigate the effect of silicone oils as processing agent affecting the loss and recovery of hydrophobicity. The recovery of hydrophobicity was evaluated by the measurement of the surface electrical resistivity and the contact angle on the SIR surface. Two kinds of silicone oils (1 and 2) having different molecular weight were selected under a consideration of hydrophobicity and processability. SIR specimens were exposed to corona discharges in air and the specimens were analyzed with contact angle and surface resistance measurements. It was observed that the contact angle and the surface resistivity of SIR increase gradually with testing time. The fast recovery of hydrophobicity of SIR, expressed by the increment of contact angle and surface resistivity, was showed in SIR2 containing silicone oil 2.

• 대한수학회지
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• 제56권3호
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• pp.689-701
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• 2019

We study the recovery results of ${\ell}_p$-constrained compressive sensing (CS) with $p{\geq}1$ via robust width property and determine conditions on the number of measurements for standard Gaussian matrices under which the property holds with high probability. Our paper extends the existing results in Cahill and Mixon from ${\ell}_2$-constrained CS to ${\ell}_p$-constrained case with $p{\geq}1$ and complements the recovery analysis for robust CS with ${\ell}_p$ loss function.

• Journal of Hospice and Palliative Care
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• 제10권3호
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• pp.120-127
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• 2007

Bereavement is the state of loss resulting from death. Grief is the emotional response associated with loss, intense and acute sorrow resulting from loss. Complicated grief represent a pathological outcome involving social, physical, emotional, cognitive, spiritual morbidity. The common psychiatric disorders associated complicated grief or abnormal grief responses include clinical depression, anxiety disorders, alcohol abuse or other substance abuse, and dependence, psychotic disorders, and post-traumatic stress disorder (PTSD). Grief tasks involve a series of stage or phases following an important loss that gradually permit adjustment and recovery. Three phases of grief involve phase 1 (walking the edges), phase 2 (entering the depths), and phase 3 (reconnecting the world). For intervention to be effective they need to be individually tailored to abnormal grief reaction or unresolved grief reaction. Clear understandings of complicated grief, abnormal responses, factors increasing risk after bereavement will often enable us to prevent psychiatric disorders in bereaved patients.

• Journal of Electrical Engineering and Technology
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• 제9권2호
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• pp.501-507
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• 2014

This paper describes the improvement in converter efficiency by reducing the switching loss and by recovering the snubber stored energy. A capacitive based passive regenerative snubber circuit is modeled for a dc-dc boost converter. The proposed snubber is mainly used to reduce the turn-off loss of the main switch. The energy recovery process and the turn-off loss depends on the size of the snubber capacitance; therefore, the conventional and the proposed converters are designed for high and low input voltage conditions with different sizes of the snubber capacitance. Based on the results obtained, the snubber capacitors are classified as small, normal and large snubbers. The Matlab simulation results obtained are presented.

• 벤처창업연구
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• 제16권6호
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• pp.17-29
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• 2021

최근 코로나19의 대유행과 재확산에 따른 사회적 거리두기 조치가 강화되고 있다. 이에 영업시간 제한 등 특히 자영업의 급격한 매출 감소로 폐업으로 내몰린 연속 기업가들이 급증하고 있다. 실패에서 배우는 것은 성공의 과정으로 설명할 수 있지만, 사업 실패는 연속 기업가의 심리적, 경제적 손실의 발생과 함께 부정적 감정으로 표출될 수 있다. 이러한 시점에서 연속 기업가들의 사업실패에 따른 부정적 감정의 회복방안을 모색하는 것은 매우 중요한 문제이다. 최근 창업학 관점에서 연속 기업가들의 사업 실패로 인한 슬픔의 부정적 감정을 처리하는 전략적 모델이 부각되고 있다. 본 연구는 연속 기업가의 사업 실패에 대한 슬픔에서 회복요인을 규명하기 위해, Shepherd(2003)의 상실 지향성, 복원 지향성, 이중적 프로세스의 3개 영역으로 설명하였다. 이를 위해 재창업에 도전한 소상공인 연속 기업가 12명을 대상으로 개별 심층 인터뷰를 진행하여 양적 데이터로 규명되지 않는 회복요인에 대한 속성들을 파악하였다. 연구 결과, 첫째, 회복요인은 개인 지향성, 가족 지향성, 네트워크 지향성 3개 영역으로 나타났다. 자존감, 끈기, 개인 역량, 취미, 자신감, 가족 지지, 네트워크, 종교, 사회적 지원 등 9개의 범주에서 회복 향상에 도움이 되는 것으로 나타났다. 둘째, 회복장애요인은 심리적, 경제적, 환경적 요인의 3개 영역으로 나타났다. 가족, 건강, 사회적 네트워크, 동업자, 경쟁자, 협력업체, 자금, 외부환경, 정부 정책 등 9개 범주에서 부정적인 감정을 지속하게 하는 것으로 나타났다. 셋째, 슬픔에 대한 감정처리 과정은 상실 지향성, 복원 지향성, 이중적 프로세스의 3개 영역으로 확인하였다. 가족, 협력업체 지원, 사회 구성원 지지, 정부 지원, 취미, 네트워크, 업종 변경, 이사, 제3자 시각, 심리학 공부 등 10개의 범주는 슬픔에 대한 감정 처리 과정에서 회복을 강화하는 것을 확인하였다. 연구의 시사점은 다음과 같다. 연속 기업가들의 사업 실패에 따른 슬픔에서 회복하는 과정을 질적 연구로 시도하였다. 특히, Shepherd(2003)의 이론을 적용하여 회복 연구에 도움이 될 수 있는 기초 자료와 향후 실증 연구를 위한 개념적 모델 및 명제를 제시하였으며 이는 향후 학술적으로 다양하게 논의하고 확장할 수 있다.

• 대한한의학원전학회지
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• 제37권3호
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• pp.21-35
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• 2024

Objectives : The aim of this study is to establish foundation for applied research and clinical application of the treatment principle and imperativeness for Korean Medical treatment of recurrent pregnancy loss through the study of classical texts. Methods : The Donguibogam, Yixuerumen, Jingyuequanshu, together with gynecological texts such as the Fuqingzhunuke and the Nukejinglun were studied in terms of treatment, post-miscarriage cultivation methods and prevention for various types of pregnancy loss. Results : For cases of missed miscarriage, Foshousan is applied, while for recovery post surgery, Shenghuatang-based formulas are applied. For cases of imminent miscarriage, prescriptions should be selected based on major symptoms such as stomach pain, lower back pain and bleeding, while for cases of chemical miscarriages, treatment methods that cultivates the Liver and calms qi should be applied. After pregnancy loss, elimination of stagnant blood should be prioritized according to the principle of 'first eliminate blood, then tonify deficiency'. For prevention of pregnancy loss, Jinguidangguisan-based formulas should be applied according to medicinal administration principles of Korean Medicine. Conclusions : For an integrative treatment and prevention of recurrent pregnancy loss, Korean Medical treatment according to clinical representation is required.

• 한방안이비인후피부과학회지
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• 제32권3호
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• pp.212-223
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• 2019

Objectives : The purpose of this study is to report three cases of Korean medical treatment for sudden sensorineural hearing loss(SSHL). Methods : This study conducted with three sensorineural hearing loss patients who hospitalized in Ophthalmology, Otolaryngology & Dermatology Clinic of Korean Medical Hospital. Three patients were treated with herbal medicine(Sunkihwalhyeol-tang, Ikgibohyeol-tang, Gongjindan) and acupuncture. After treatment, we evaluated Siegel's Criteria with pure tone audiometry and subjective symptoms alteration. Results : All three patients were completely recovery about Siegel's Criteria and improved subjective symptoms after treatment. Conclusions : This study suggests that Korean medical treatment may be effective about SSHL.

• 생물환경조절학회지
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• 제9권4호
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• pp.212-222
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• 2000

본 연구는 온실 난방시스템의 연소 체임버에 부착된 연소가스 배출연통에 열회수기를 장착하여 배출가스로부터 열을 회수하는 열회수장치의 성능에 대해 실험·분석하였다. 열회수시스템은 LPG 연소 체임버와 두 개의 열회수기로 구성되어있다. 열회수기-A는 배기가스 연통에 직접 연결되어 있으며 열회수기-B는 열회수기-A에 직렬로 연결되어 있다. 회수되는 열량은 가스의 질량흐름율과 두 측점간의 엔탈피 차이로서 산정하였으며 5가지의 송풍전압별로 각 열회수기의 성능을 검토하였다. 각 열회수기의 공기튜브 다발에 공급된 공기와 튜브 다발에 가로질로 통과하는 연소가스간의 열교환, 열회수기 유·출입부간의 압력감소, 열회수기의 총열회수성능 등으로 온실의 연통을 통해 낭비되는 열을 회수하여 연료 절감 효과를 얻을 수 있는 최적의 열회수장치 설계용 기초자료 확보에 본 연구의 목적이 있다.