• 한국해양생명과학회지
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• 제6권2호
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• pp.117-123
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• 2021

Post-disturbance recovery pattern of subtidal soft corals-macroalgae mixed community and the role of water depth were investigated. The experiment was conducted in a subtidal rock wall of Munseom, Jeju Island, Korea for 2.5 years. Artificial disturbance was done at established treatment plots at depths of 10, 15 and 20 m and were then compared with undisturbed control plots. After disturbance, recovery of soft corals was very slow, whereas macroalgae quickly occupied the plots and reached a similar level as the control in 6 months, and this pattern was consistent at all water depths. This unbalanced speed of recovery caused higher macroalgae establishment than soft corals in treatment compared to control plots, indicating a possible phase shift in the community structure. This study provides an important implication for the necessity of monitoring the influence of disturbance at a larger scale, from a conservation perspective of soft corals in Jeju coast.

• International Journal of Naval Architecture and Ocean Engineering
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• 제4권4호
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• pp.488-503
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• 2012

The stern boat deployment system was investigated to evaluate the capability of launching and recovering rigid hull inflatable boat (RHIB) via the stern ramp. The main parameters to launch and recover RHIB were tested at the design stage. The combined hydrodynamic effect of the stern wake and the water jet flow made it difficult to maintain the maneuvering and sea-keeping ability of RHIB approaching to the stern ramp. The safe recovery course was proposed to maintain the directional control of RHIB and to reduce the combined hydrodynamic effect in the transom zone. To evaluate the feasibility of RHIB recovery, the stern sill depth was measured in various conditions and the ramp availability time was obtained. Also, the experimental percent time operability (PTO) test was performed by the number of successive launching and recovering operations.

• 반도체디스플레이기술학회지
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• 제12권2호
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• pp.27-32
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• 2013

Shape From Focus (SFF) is a passive optical technique to recover 3D structure of an object that utilizes focus information from 2D images of the object taken at different focus levels. Mostly, SFF methods use a single focus measure to compute image focus quality of each pixel in the image sequence. However, it is difficult to recover accurate 3D shape using a single focus measure, as different focus measures perform differently in diverse conditions. In this paper, a nonlinear Total Variation (TV) based approach is proposed for 3D shape recovery. To improve the result of surface reconstruction, several initial depth maps are obtained using different focus measures and the resultant 3D shape is obtained by diffusing them through TV. The proposed method is tested and evaluated by using image sequences of synthetic and real objects. The results and comparative analysis demonstrate the effectiveness of our method.

• 한국방재학회 논문집
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• 제8권1호
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• pp.71-79
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• 2008

산불피해 임지의 식생복원 정도 및 문제점을 파악하기 위하여 산불발생 후 임목피해, 식생회복력 등의 조사 연구를 수행하였다. 소나무 고사율은 수간 및 수관의 피해흔적이 심할수록 피해율이 높았다. 산불피해지에 있어서 수관화에 의해 임분이 전소되는 피해를 받은 지역에서의 식생회복은 대부분이 매토종자 및 맹아에 의한 식생의 회복이 진행되었다. 식생회복과 복원력은 전생 임분의 식생상태와 토심에 따라서 차이가 나타났다. 인공복원의 경우 자작나무 조림지의 경우에는 병충해에 의한 피해가 발생하기도 하였다. 소나무, 해송 조림지의 경우 입지에 따른 생장차이 보다는 조사지내 개체목간의 생장차이가 다소 나타났다.

• 대한조선학회논문집
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• 제54권4호
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• pp.301-311
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• 2017

Safety operational envelope (SOE) is the area which guarantees the safety of a submarine from the accident such as jamming and flooding. The maximum safe depth is set to prevent the damage to the hull from increasing water pressure with depth. A minimum safety depth is set to prevent a submarine from the exposure above the free surface and collision against surface ship. The prediction method for the SOE in the design phase is needed to operate the submarine safely. In this paper, the modeling and calculation methods of the SOE are introduced. Main ballast tank blowing modeling and propeller force modeling are conducted to simulate the accidents and the recovery process. The SOEs are established based on the crash stop and emergency rising maneuver simulation. From the simulation results, it can be known that the emergency rising maneuver is more effective recovery action than the crash stop.

• 성인간호학회지
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• 제22권3호
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• pp.342-351
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• 2010

Purpose: The purpose of this study was to determine an increase in the number of younger and middle-aged people who have a stroke and the differences in their recovery experience compared with older people. Methods: The research question for this study was "What is the recovery experience of young adults and middle-aged people who suffer a stroke?". In order to answer the question, the grounded theory method was utilized. The data was collected through individual in-depth interviews of six participants, their age ranged from 36 to 45 years old. Results: After comparative analysis, the core category was "standing up for oneself with limit". The experience process were categorized into four stages: 'Facing Reality stage', 'Motivation stage', 'Desire Recovery stage', 'Self-Overcoming stage'. Conclusion: Most of the research for the recovery process was prognostic in nature and the results. This study was demonstrated certain indicators which can be useful in further research.

• 가정∙방문간호학회지
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• 제27권3호
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• pp.344-355
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• 2020

Purpose: Recovery has a growing influence on policy for individuals with mental illness and their families. This study was designed to examine the meaning of recovery from the perspectives of community-dwelling patients with mental illness and their families. Methods: Using a descriptive qualitative approach, in-depth, face-to-face interviews were conducted on 24 adults (14 patients with mental illness and 10 family members). All interviews were audiotaped, transcribed and analyzed using thematic analysis. Results: The findings showed that recovery for the patients with mental illness suggested gradual changes by individual will and self-awareness, the relationship with both their family and self-help group, and the support of a therapeutic environment. Seven primary themes emerged from the analysis: improving insight on illness, strong will toward hope, discovering changed myself, helping each other together, gradual influence of positivity, being oriented to a therapeutic setting, and recognizing of home as a calm place. Conclusion: The findings of this study revealed that based on the conceptual elements of recovery of the patients with mental illness and their families, we expect to improve the systematic, comprehensive, and quality mental health services.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 춘계학술대회 논문집
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• pp.75-79
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• 1995

A cutting experiment using diamond tool was performed to make the die cabity which is composed of micro groove with mirror surface. Fine cutting depth was generated by the elastic recovery of the modified tool holder on the conventional M/C. Surface roughness and profile were investigated with cutting speed and depth and through the low cutting speed of 10mm/min, Rmax 0.005 .mu. m or less of machined surface could be achieved.

• 대한기계학회논문집
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• 제19권6호
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• pp.1431-1438
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• 1995

In this paper, we present a multiple-view stereo matching method in case of moving in the direction of optical axis with stereo camera. Also we analyze the obtainable depth precision to show that multiple-view stereo increases the virtual baseline with single-view stereo. This method decides candidate points for correspondence in each image pair and then search for the correct combinations of correspondences among them using the geometrical consistency they must satisfy. Adantages of this method are capability in increasing the accuracy in matching by using the multiple stereo images and less computation due to local processing. This method computes 3-D depth by averaging the depth obtained in each multiple-view stereo. We show that the resulting depth has more precision than depth obtainable by each independent stereo when the position of image feature is uncertain due to image noise. This paper first defines a multipleview stereo agorithm in case of moving in the direction of optical axis with stereo camera and analyze the obtainable precision of computed depth. Then we represent the effect of removing the incorrect matching candidate and precision enhancement with experimental result.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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• pp.231-234
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• 1998

The soft reverse recovery characteristics of P-I-N power diodes by different lifetime killer were compared in this paper. It was concluded that the best local lifetime control at N- base was achieved through the optimization of penetrated depth into the wafer by 5 MeV proton irradiation, resulting in significant soft recovery performance in our study. The results of 5∼12 MeV electron irradiation and platinum diffusion were also discussed here.