• Korean Journal of Environment and Ecology
• /
• v.16 no.4
• /
• pp.403-408
• /
• 2003

Fishfauna were investigated in the Baekdudaegan Mountain area (Manbokdae-siribong) streams. At the uppertributary of Seomjin River, 17 species of 5 families were collected and the dominant species was Zacco temminki. Korean endemic species were six (35.3%) species, Acheiognathus koreensis, Coreoleuciscus splendidus, Squalidus gruacilis majimae, Microphysogobio yaluensis, Iksookimia longicorpus, and Odontobutis platycephala. Only Lampetra reissneri designated as a vulnerable species, was confirmed at the stream. At the upper streams of the Nakdong River, collected fishes were identified as 11 species of 3 families. The dominant species was Zacco temmincki, and two species (18.2%), Squalidus gracilis. majiimae and Ikosokimia longicorpus were Korean endemic.

• The Journal of Engineering Geology
• /
• v.25 no.4
• /
• pp.439-447
• /
• 2015

In this study, specific sections vulnerable to debris flow damage were selected, and a complete enumeration survey was performed for the sections with debris flow hazards. Based on this, the characteristics of the sections with debris flow hazards and the current status of actions against debris flow were examined, and an efficient installation plan for a debris flow damage prevention method that is required in the future was suggested. The results indicated that in the Route 56 section where the residential density is relatively higher between the two model survey sections, facilities for debris flow damage reduction were insufficient compared to those in the Route 6 section which is a mountain area. It is thought that several sites require urgent preparation of a facility for debris flow damage reduction. In addition, a numerical analysis showed that for debris barriers installed as a debris flow damage prevention method, distributed installation of a number of small-scale barriers facilities within a valley part was more effective than single installation of a large-scale debris barrier at the lower part of a valley.

• The Korean Journal of Physiology and Pharmacology
• /
• v.5 no.3
• /
• pp.205-212
• /
• 2001

It has been proposed that nitirc oxide is involved in the pathogenesis of cerebral ischemia-reperfusion. Because superoxide production is also enhanced during reperfusion, the cytotoxic oxidant peroxynitrite could be formed, but it is not known if this occurs following global forebrain ischemia-reperfusion. We examined whether peroxynitrite generation is increased in the vulnerable regions after forebrain ischemia-reperfusion. Transient forebrain ischemia was produced in the conscious rat by four-vessel occlusion. Rats were subjected to 10 or 15 min of forebrain ischemia. Immunohistochemical method was used to detect 3-nitrotyrosine, a marker of peroxynitrite production. 3-Nitrotyrosine immunoreactivity was enhanced in the hippocampal CA1 area 3 days after reperfusion. Furthermore, in rats subjected to ischemia for 15 min, this change was also observed in the lateral striatal region and the lateral septal nucleus $2{\sim}3$ days after reperfusion. The cresyl violet staining of adjacent sections showed that neuronal cell death was induced in parallel with the nitrotyrosine immunoreactivity in the hippocampal CA1 area and the lateral striatal region. Our findings suggest that oxygen free radical accumulation and consequent peroxynitrite production play a role in neuronal death caused by cerebral ischemia-reperfusion.

• Journal of Environmental Science International
• /
• v.30 no.1
• /
• pp.29-43
• /
• 2021

This study analyzed the status of climate-change indicator plants native to the main islands of the Korean peninsula, while elucidating their distribution characteristics. Information on flora from over 129 island locations, comprising more than 100 species of native plants, was collected, compiled into a database, and utilized as raw data. The distribution of 193 climate-change indicator plants was confirmed. The distribution area of broadleaf evergreen trees and ferns, including Mallotus japonicus and Cyrtomium falcatum, was relatively wide. In contrast, the distribution of common northern plants such as Corydalis turtschaninovii and Malus baccata was limited. If global warming persists, northern plant distribution is expected to decrease rapidly in the Korean Peninsula island region, while the northern limit line of the southern plants is expected to migrate further northward. During this process, it is likely that the plant congregation structure and species diversity within the island region will change dynamically. In this study, comparative analyses between species and regions were conducted by assessing the relative frequency of their occurrence, and six types of botanical geographic distribution patterns were noted.

• Korean Journal of Fisheries and Aquatic Sciences
• /
• v.56 no.3
• /
• pp.341-346
• /
• 2023

This study aimed to suggest an alternative income generation (AIG) for local artisanal fisheries communities in the southern coastal area of Bangladesh, which is vulnerable to climate change. To analyze the problems of local artisanal fisheries caused by climate change, field surveys and in-depth interviews with fishermen and government officials were conducted. Livelihood risk factor (LRF) in the marine fishing sector included reduction of fishing days and fish production and damage to fishing vessels and fishing gear due to cyclone and sea-level rise. LRF in the aquaculture sector included cultured fish escape, reduction of aquaculture production, and water pollution due to Monsoon flood. A common challenge for two sectors was high interest rate on commercial loans. Small-scale tank aquaculture is recommended as AIG for securing income of artisanal fisheries communities. In the early stages of dissemination of small-scale tank aquaculture technology, it is necessary to prevent fishermen from struggling to repay high-interest rate loans through technology transfer and facility support by official development assistance. The aquaculture training center, along with the technical education, will also contribute toward expansion of local distribution network and marketing support to establish a value chain for local artisanal fisheries communities.

• Geomechanics and Engineering
• /
• v.34 no.2
• /
• pp.187-195
• /
• 2023

Intensive rainfall during the summer season in Korea has triggered numerous devastating landslides outside of downtown in mountainous areas. The 2D slope stability analysis that is generally used for cut slopes and embankments is inadequate to model slope failure in mountainous areas. This paper presents a new 3D slope stability formulation using the global sliding vector in the limit equilibrium method, and it uses an ellipsoidal slip surface for static and quasi-static analyses. The slip surface's flexibility of the ellipsoid shape gives a lower FS than the spherical failure shape in the Fellenius, Bishop, and Janbu's simplified methods. The increasing sub-columns of each column tend to increase the FS and converge to a steady value. The symmetrical geometric conditions of the convex turning corners do not indicate symmetrical failure of the surface in 3D analysis. Pseudo-static analysis shows that the horizontal seismic force decreases the FS and increases the mass volume at the critical failure state. The stability index takes the FS and corresponding sliding mass into consideration to assess the potential risk of slope failure in complex mountainous terrain. It is a valuable parameter for selecting a vulnerable area and evaluating the overall risk of slope failure.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• v.50 no.2
• /
• pp.110-115
• /
• 2024

A 22-year-old male patient presented to the clinic with severe pain in the preauricular area with an inability to completely occlude the jaw. Facial computed tomography and magnetic resonance imaging revealed a well-defined lesion that was tentatively diagnosed as a benign tumor or cystic mass. Surgical approach of a lesion in the condyle is delicate and problematic as many vulnerable anatomical structures are present. There are several methods for surgery in this area. Typically, an extraoral approach is dangerous because of potential injuries to nerves and arteries. The intraoral approach also presents difficulties due to the lack of visibility and accessibility. On occasion, coronoidectomy may be performed. The goal here was to determine an easier and safer new surgical approach to the condyle. We reached the anterior part of the pterygoid plate in the same method as in Le Fort I surgery. From this point, through the external pterygoid muscle, approaching the anterior aspect of the condyle is relatively easy and safe, with minimal damage to the surrounding tissues. Pus was drained at the site, and the lesion was diagnosed as an abscess. Pain and inability to close the mouth resolved without recurrence.

• The Journal of Korean Society for School & Community Health Education
• /
• v.17 no.1
• /
• pp.23-33
• /
• 2016

Objectives: The purpose of this study is analysing the influence of how health behavior such as smoking, drinking, and consuming salt and obesity affects to blood pressure and providing useful data for preventing ischemic heart disease of Peru which is main cause of death since 2012 and promoting healthy lifestyle of community. Methods: At the selected four districts in Lima and Callao region of Peru by KOICA Peru office, survey was conducted among adults over the age of 18. Excepted 19 incomplete people for the missing, 686 people were analysed in this survey. Results: There was no significant relationship between blood pressure and drinking and salt intake. By regression analysis, systolic blood pressure was significantly related with gender, age and abdominal obesity and diastolic blood pressure was significantly related with gender and abdominal obesity. Conclusions: As a result, diastolic and systolic blood pressure are mainly affected by waist circumference and gender. Therefore, It's need to be classifying male into vulnerable groups in the occurrence of hypertension and providing health education and information about hypertension to them. For improving health status of vulnerable group, awareness of hypertension prevention and changing unhealthy lifestyle to healthy lifestyle activities are necessary. In the end, it is necessary to prevent abdominal obesity through periodic health education.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.57 no.1
• /
• pp.128-136
• /
• 2008

In this paper, we propose a new cache structure for effective error correction of soft error. We added check bit and SEEB(soft error evaluation block) to evaluate the status of cache line. The SEEB stores result of parity check into the two-bit shit register and set the check bit to '1' when parity check fails twice in the same cache line. In this case the line where parity check fails twice is treated as a vulnerable to soft error. When the data is filled into the cache, the new replacement algorithm is suggested that it can only use the valid block determined by SEEB. This structure prohibits the vulnerable line from being used and contributes to efficient use of cache by the reuse of line where parity check fails only once can be reused. We tried to minimize the side effect of the proposed cache and the experimental results, using SPEC2000 benchmark, showed 3% degradation in hit rate, 15% timing overhead because of parity logic and 2.7% area overhead. But it can be considered as trivial for SEEB because almost tolerant design inevitably adopt this parity method even if there are some overhead. And if only parity logic is used then it can have $5%{\sim}10%$ advantage than ECC logic. By using this proposed cache, the system will be protected from the threat of soft error in cache and the hit rate can be maintained to the level without soft error in the cache.

• Journal of Korean Library and Information Science Society
• /
• v.51 no.2
• /
• pp.295-318
• /
• 2020

This study was conducted to grasp the changing user needs, especially the changing information needs of the vulnerable groups of knowledge and information. The study analyzed the information needs of the migrants in Area A by introducing a community-based participatory research methodology. The authors cooperated with the local community throughout the entire course of the study and proposed an inclusive library strategy for the underprivileged in the A region. Migrants were in demand for easy writing materials, reading activities programs, leisure culture programs, and literacy programs. In particular, it was analyzed that services should be provided through cooperation with related organizations. As a result of the study, it was suggested to provide experiences of deeply participating in the current library and to provide various information sources (resource guides) and to promote through children.