• Korean Architects
• /
• no.1 s.429
• /
• pp.51-63
• /
• 2005

을유년 새해가 밝았다. 우리 협회도 올해로써 불혹의 나이에 접어들었다. 인생으로 치면 황금기를 맞은 것이다. 그러나 회장의 불신임, 감사의 사퇴 등 얼룩진 여파가 지금도 계속되고 있는가 하면 원칙이나 냉철한 손익분석도 없이 지엽적인 것 때문에 중앙제와 연합제가 소용돌이치고 있는 현실이다. 40년간 20여분의 회장이 재임하였다. 굳이 이들의 개인별 평가를 하지 않더라도 협회의 성장과 쇠락, 단결과 분열 등은 회장의 철학과 리더십에 기인한다는 것은 보편적 사실이다. 이제 한 달 후면 새로운 회장을 선임하게 되고 대행체제의 막을 내린다. 다시는 이러한 일이 없도록 하기 위하여, 좀 더 나은 내일의 협회를 위하여 우리 협회의 이상적인 회장상을 그려보는 특집을 마련하였다. 지면상 많은 분의 글을 싣지는 못하였으나 우리 협회를 관심 있게 지켜보는 외부 인사를 포함하여 서울과 지방 등 다양한 의견을 듣고자 하였다. 입후보 예정자들은 이들의 바람과 스스로를 비견하여 진퇴를 명확히 해야 할 것이고, 회원들은 인터넷을 통한 협회 회원 토론방에 활발한 자기 의견을 개진해 줄 것을 당부한다. 그리하여 대의원들은 지역, 학교, 친불친을 떠나 회원들이 원하는 회장에 가장 가까운 후보자에게 투표해야 할 것이다. 이번 특집이 좀 더 나은 협회의 내일을 여는데 조금이라도 기여하기를 바란다.

• Korean journal of communication and information
• /
• v.41
• /
• pp.232-267
• /
• 2008

This study is a comparative analysis of news frames between Chosunilbo and Hankyereh which have shown contrastive political attitude. The coverage of two political scandal, the Prime Minister Lee Haechan's golf happening and an Assemblyman of opposition party Choi Yeonhee's sexual harassment were analysed. The two political scandals were occurred one after the other and had some similarities. But two newspapers showed very contrastive frame on the two political scandals. On the Prime Minister Lee's scandal Chosunilbo showed politicizing frame, lobby golf frame, immorality frame, resignation frame. In contrast Hankyereh used depoliticization frame and human error frame. On the Assemblyman Choi's scandal Hankyereh showed politicizing frame, personal responsibility frame, immorality frame, resignation frame. But Chosunilbo used social responsibility frame and human error frame. In conclusion two newspapers showed very contrastive coverage according to the respective political attitude.

• Geophysics and Geophysical Exploration
• /
• v.16 no.3
• /
• pp.145-153
• /
• 2013

High-resolution chirp profiles were analyzed to investigate the echo types of near-surface sediments in the Yellow Sea off the Baegryeong Island. On the basis of seafloor morphology and subbottom echo characters, 7 echo types were identified. Flat seafloor with no internal reflectors or moderately to well-developed subbottom reflectors (echo type 1-1 and 1-2) is mainly distributed in the southern part of the study area. Flat seafloor with superposed wavy bedforms (echo type 1-3) is also distributed in the middle part. Mounded seafloor with either smooth surface or superposed bedforms (echo type 2-1, 2-2, and 2-3) occurs in the middle part of the study area. Irregular and eroded seafloor with no subbottom reflectors (echo type 3-1) is present in the northern part of the study area off the Baegryeong Island. According to the distribution pattern and sedimentary facies of echo types, depositional environments can be divided into three distinctive areas: (1) active erosional zone due to strong tidal currents in the northern part; (2) formation of tidal sand ridges in response to tidal currents associated with sea-level rise distributed in the middle part; and (3) transgressive sand sheets in the southern part. Such a depositional pattern, including 7 echo types, in this area reflects depositional process related to the sea-level rise and strong tidal currents during the Holocene transgression.

• Ocean and Polar Research
• /
• v.35 no.1
• /
• pp.51-61
• /
• 2013

Two surveys were conducted in January 2006 and September 2007 with multibeam echosounder to investigate the dune shape, migration rate, and bedload transport rate using dune-tracking method on an offshore sand ridge at southern Gyeonggi Bay. The migration rates of dunes range from 1.8 $myr^{-1}$) to 56.0 $myr^{-1}$), at the upper northwestern side of sand ridge towards the southwest direction and from the center of the sand ridge towards the northeast direction respectively. Large (i.e. length 10-100 m) dunes show faster migration (0.3-23.4 $myr^{-1}$) ) than very large (i.e. length > 100 m) dunes because larger dunes have required a larger volume of sediments to be displaced. The decreases in dimensions and migration rates of dunes from the center of sand ridge to the lower part of southeastern side on the sand ridge can be ascribed to the decrease of sandy sediments availability, tidal currents with depth, and the coarsening of surface sediments from the crest of the sand ridge to the trough. Bedload transport rates on the basis of migration rates and dune dimensions decrease from 74.5 $m^2yr^{-1}$) at C transect to 35.6 $m^2yr^{-1}$) at R-02 transect.

• Journal of Wetlands Research
• /
• v.11 no.2
• /
• pp.39-46
• /
• 2009

Garolim Bay is typically a semi-enclosed bay without a significant supply of freshwater and sediments from surrounding drainage area. The bay have a variety of subenvironments including deep tidal channels, tidal flats, sand dunes, islands, and inlet. Because environmental quality of bay strongly depends on the exchange of water over benthic subenvironments, it is necessary to analyze quantitatively exchange of water between sea and bay. Hydro-hypsography is the relative distribution of water-surface areas at different depths. The hydro-hypsographic curve in Garolim bay shows that the tidal flats occupy about 77 % of the bay surface. Hydraulic turn-over time (HTT) is 1.32 tidal cycles which indicate well-flushed bay. Hydro-hypsometric techniques will be useful for assessments of health of bays.

• 한국해양학회지
• /
• v.26 no.4
• /
• pp.340-349
• /
• 1991

From tidal current measurements on a tidal sand ridge in the Gyeonggi Bay from August 24 to September 29, 1987, tidal current velocities at 1.0 m above bottom (U/SUB 100/) and boundary shear velocities (U/SUB */) are calculated. The mean speeds of tidal current for flood and ebb over the entire period are 56.3 cm/sec and 63.7 cm/sec in mid-depth (9.0 m above bottom), and 43.9 cm/sec and 43.8 cm/sec in near-bottom (1.5 m above bottom). The exponent(P) in "power law", which is generally used for extrapolation from the mid-depth current velocity to that at the top of nationally logarithmic layer, is estimated to be 0.15 in the study area. Using logarithmic velocity profile assumption, mean values of U/SUB 100/ and U/SUB */ are calculated to be 41.4 cm/sec and 2.39 cm/sec, respectively. The mean value of U/SUB */ (2.39 cm/sec) is much higher than the critical shear velicity (U/SUB *c/) of 1.40 cm/sec reported by Choi (1990). and thus, it can be suggested that the most of sands on the tidal sand ridge in the study area are easily eroded and transported for the greater part of tidal period.

• Journal of Wetlands Research
• /
• v.7 no.2
• /
• pp.53-67
• /
• 2005

Cheonsu bay, which is typically a semi-closed type, is characterized by various environments such as channels, sand bars, small islands and tidal flats. The construction of Seosan A and B sea dikes from 1983 to 1985 might continuously change sedimentary environments in the northern part of the bay. In order to investigate sedimentary environment, surface and core sediments were sampled at the Hwangdo tidal flat and adjacent sea in June and October 2003. The surface sediments consisted of five sedimentary facies. Generally, the surface sediments in October were changed coarser on the tidal flat and little changed in the subtidal area compared to those in June 2003. Sedimentary facies analysis of three core sediments suggested that wave and tidal current were relatively strong in the tidal flat near Hwangdo, whereas the energy was relatively low in the tidal flat near channel. Sediment accumulation rates in the Hwangdo tidal flat during 11 months indicated that sediments deposited in the central part, whereas eroded in eastern and western sides of the tidal flat. These caused that sea dike changed tidal current patterns and sediment supplies.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2015.05a
• /
• pp.395-395
• /
• 2015

하천 내 식생은 수리학, 지형학 및 생태학적으로 매우 중요하다. 식생은 하천 수생물들의 서식처를 제공할 뿐만 아니라 필터와 같은 역할을 함으로써 부유사에 의한 하천오염물의 퇴적을 유발하여 하천의 수질을 개선시킨다. 더욱이, 하천 내 흐름 및 난류구조를 변경시킴으로써 식생주변의 유사 퇴적량 및 분포에 크게 영향을 미치고, 결국 하천의 지형을 변화시킨다. 개수로의 식생에 대한 영향은 주로 실험 및 수치모델을 이용하여 연구되었고 전단면이 식재된 조건에서 식생의 항력계수, 식생역내의 부유사 및 확산에 관한 연구가 진행되어왔다. 이러한 연구를 통해 식생역 내의 전단력이 감소하여 부유사퇴적이 증가하고 식생역과 비식생역 사이의 운동량 교환에 의해 부유사 퇴적이 증가함을 보였다. 그러나 개수로에서 존재하는 유한한 크기의 식생에 의한 흐름 및 유사분포에 관한 연구는 아직 미흡하다. 이에 본 연구에서는 침수하지 않은 원형 식생 주변에서 발생하는 흐름특성을 수치모의 하였다. 침수하지 않은 원형식생 하류에서 발생하는 흐름을 계산하기 위해 2차원 수치모형을 적용하였다. 식생에 의한 저항을 고려하기 위해 운동량 방정식에 식생항을 추가하였고 $k-{\varepsilon}$ 난류모형을 적용하였다. 수치모의 조건은 Zong and Nepf (2012)의 수리실험을 참고하여 수로의 길이는 12 m, 폭은 1.2 m로 설정하였다. 0.13 m 수심을 갖는 개수로에 0.22 m 지름을 갖는 원형식생을 상류경계로부터 1.0 m 떨어진 곳에 설정하였다. 식생의 밀도($6{\sim}77m^{-1}$)를 변화시키면서 원형식생 하류의 흐름거동을 분석하였다. 식생밀도가 높은 경우에는 원형식생 양 측면에서 유발된 전단층들의 상호작용에 의해 하류에서 와류가 발생하였다. 와류가 발생하는 위치에서 난류강도가 가장 크게 나타났다. 그러나 식생밀도가 일정 값보다 낮아지면 와류가 발생하지 않는 것으로 나타났다.

• The Journal of Korean Philosophical History
• /
• no.29
• /
• pp.7-31
• /
• 2010

This paper seeks to illuminate the intellectual context of Giljae, who had carried out a unique life during the late Koryŏ and early Chosun period and left quite a significant imprint on the Chosun intellectual history. In the midst of the tumultuous political changes in the late Koryŏ, Giljae worried the fate of the declining Koryŏ dynasty after contemplating on the directions that Yi Sŏnggye had taken after the Wihwado Retreat and made it very clear that he would rather honor the integrity of Baekyi·Sukje(伯夷叔齊). The traces that Giljae had left in this period obtained its significance not just as a loyal integrity of a subject but as a paragon of life that lived up to the principles of the Confucius truth. To decline a prestigious position in the service of a king when it was offered is not just to buy the honor of integrity. It is an endeavor to live one's life right as to how one entered the world and retreated from it in accordance with the Confucius teachings. That many kings and scholars in the Chosun period placed Giljae highly in the intellectual history of Korean Confucianism in remembering his integrity is none other than the recognition of this fact.

• 한국해양학회지
• /
• v.28 no.3
• /
• pp.241-258
• /
• 1993

To investigate the sedimentary environments on the coastal areas of Imja to Nakweol islands which show very complex shorelines and several zonal sand ridges in NE-SW direction, southwestern coast of Korea, a total of forty samples were taken by a grab sampler and sedimentological and micropaleontological studies on those samples were carried out. The present study area are classified into muddy sandy gravel, sand, city sand, sandy silt and silt facies. With statistical moment parameters such as mean, sorting, skewness and ketosis for the sediments in the study area, the sediments are generally categorized as shallow sedimentary facies. The characters that are observed in quartz grains among the sandy sediments of the study area imply the existence of high energy environments, temporal exposures in atmosphere and the mixing of clastic sediments of the several different origins. In the sediments of the study area, one genera belonging to six silicoflagellata species and five genera belonging to five nannoplankton species were detected. On the basis of the micro-organism assemblage, the study area seems to be influenced by active reworking dominantly under warm water masses. In addition, organic matter ad carbonate contents in the sediments did not show a definite relation with the occurrences of the micro-organisms in the study area.