• Earthquakes and Structures
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• 제23권3호
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• pp.231-243
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• 2022

The earthquake with a magnitude of Mw 6.8, which occurred on January 24, 2020, hit Sivrice (Elazığ) province of Turkey. The earthquake area takes place on the East Anatolian Fault Zone (EAFZ) located between the Arabian and Turkish plates, one of the most active seismic regions in Turkey. According to the Disaster and Emergency Management Presidency of Turkey (AFAD), 584 buildings collapsed, 6845 were heavily damaged, 1207 were moderately damaged, and 14389 were slightly damaged. The authors went to the region of earthquake after the mainshock to investigate the earthquake performances of masonry buildings. This paper presents the seismological aspects of the earthquake, acceleration records, and response spectra with different damping ratios. Furthermore, some typical damages and failure mechanisms on masonry buildings like rubble stone dwellings and minarets are discussed with illustrative photos. Although many major earthquakes have occurred in the region, similar mistakes are still being made in masonry building construction. In consequence, some suggestions viewpoint of the wooden tie beams, the corner details of masonry walls, the door and window openings, the metal fasteners and the earthquake codes are made to be more careful in masonry constructions at the end of the article.

• 대한의용생체공학회:의공학회지
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• 제32권1호
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• pp.7-14
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• 2011

This study suggested an optimized algorithm for detecting the loss of balance(LOB) in the seated position. And the sensitivity analysis was performed in order to identify the role of each design variable in the algorithm. The LOB algorithm consisted of data processing of measured signals, an internal model of the central nervous system and a control error anomaly(CEA) detector. This study optimized design variables of a CEA detector to obtain improved values of the success rate(SR) of detecting the LOB and the margin time(MT) provided for preventing the falling. Nine healthy adult volunteers were involved in the experiments. All the subjects were asked to balance their body in a predescribed seated posture with the rear legs of a four-legged wooden chair. The ground reaction force from the right leg was measured from the force plate while the accelerations of the chair and the head were measured from a couple of piezoelectric accelerometers. The measured data were processed to predict the LOB using a detection algorithm. Variables S2, h2 and hd are related to the detector: S2 represents a data selecting window, h2 a time shift and hd an operating period of the LOB detection algorithm. S2 was varied from 0.1 to 10 sec with an increment of 0.1 sec, and both h2 and hd were varied from 0.01 to 1.0 sec with an increment of 0.01 sec. It was found that the SR and MT were increased by up to 9.7% and 0.497 sec comparing with the previously published case when the values of S2, h2 and hd were set to 4.5, 0.3 and 0.2 sec, respectively. Also the results of sensitivity analysis showed that S2 and h2 had considerable influence on the SR while these variables were not so sensitive to the MT.

• 수산해양기술연구
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• 제32권1호
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• pp.33-41
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• 1996

In order to obtain the most favourable classification system for fishing gears, the problems in the existing systems were investigated and a new system in which the fishing method was adopted as the criterion of classification and the kinds of fishing gears were obtained by exchanging the word method into gear in the fishing methods classified newly for eliminating the problems was established. The new system to which the actual gears are arranged is as follows ; (1)Harvesting gear \circled1Plucking gears : Clamp, Tong, Wrench, etc. \circled2Sweeping gears : Push net, Coral sweep net, etc. \circled3Dredging gears : Hand dredge net, Boat dredge net, etc. (2)Sticking gears \circled1Shot sticking gears : Spear, Sharp plummet, Harpoon, etc. \circled2Pulled sticking gears : Gaff, Comb, Rake, Hook harrow, Jerking hook, etc. \circled3Left sticking gears : Rip - hook set line. (3)Angling gears \circled1Jerky angling gears (a)Single - jerky angling gears : Hand line, Pole line, etc. (b)Multiple - jerky angling gears : squid hook. \circled2Idly angling gears (a)Set angling gears : Set long line. (b)Drifted angling gears : Drift long line, Drift vertical line, etc. \circled3Dragged angling gears : Troll line. (4)Shelter gears : Eel tube, Webfoot - octopus pot, Octopus pot, etc. (5)Attracting gears : Fishing basket. (6)Cutoff gears : Wall, Screen net, Window net, etc. (7)Guiding gears \circled1Horizontally guiding gears : Triangular set net, Elliptic set net, Rectangular set net, Fish weir, etc. \circled2Vertically guiding gears : Pound net. \circled3Deeply guiding gears : Funnel net. (8)Receiving gears \circled1Jumping - fish receiving gears : Fish - receiving scoop net, Fish - receiving raft, etc. \circled2Drifting - fish receiving gears (a)Set drifting - fish receiving gears : Bamboo screen, Pillar stow net, Long stow net, etc. (b)Movable drifting - fish receiving gears : Stow net. (9)Bagging gears \circled1Drag - bagging gears (a)Bottom - drag bagging gears : Bottom otter trawl, Bottom beam trawl, Bottom pair trawl, etc. (b)Midwater - drag gagging gears : Midwater otter trawl, Midwater pair trawl, etc. (c)Surface - drag gagging gears : Anchovy drag net. \circled2Seine - bagging gears (a)Beach - seine bagging gears : Skimming scoop net, Beach seine, etc. (b)Boat - seine bagging gears : Boat seine, Danish seine, etc. \circled3Drive - bagging gears : Drive - in dustpan net, Inner drive - in net, etc. (10)Surrounding gears \circled1Incomplete surrounding gears : Lampara net, Ring net, etc. \circled2Complete surrounding gears : Purse seine, Round haul net, etc. (11)Covering gears \circled1Drop - type covering gears : Wooden cover, Lantern net, etc. \circled2Spread - type covering gears : Cast net. (12)Lifting gears \circled1Wait - lifting gears : Scoop net, Scrape net, etc. \circled2Gatherable lifting gears : Saury lift net, Anchovy lift net, etc. (13)Adherent gears \circled1Gilling gears (a)Set gilling gears : Bottom gill net, Floating gill net. (b)Drifted gilling gears : Drift gill net. (c)Encircled gilling gears : Encircled gill net. (d)Seine - gilling gears : Seining gill net. (e)Dragged gilling gears : Dragged gill net. \circled2Tangling gears (a)Set tangling gears : Double trammel net, Triple trammel net, etc. (b)Encircled tangling gears : Encircled tangle net. (c)Dragged tangling gears : Dragged tangle net. \circled3Restrainting gears (a)Drifted restrainting gears : Pocket net(Gen - type net). (b)Dragged restrainting gears : Dragged pocket net. (14)Sucking gears : Fish pumps.

• 한국전통조경학회지
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• 제36권3호
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• pp.48-57
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• 2018

본 연구는 중국 영남지방의 4대 명원 가운데 하나인 여음산방에 대해 현지조사와 시문 분석 등을 수행한 결과 다음과 같은 결론을 도출하였다. 첫째, 여음산방의 조영자는 우빈(?彬 1824~1897)이며, 원림 면적은 $1,598m^2$이다. 우빈은 원림의 이름을 '여음(餘蔭)'이라고 하였는데 그 뜻은 조상의 음덕을 의미하였다. 둘째, 조영자가 쓴 시문을 분석해 보면, 미래 이상세계를 표현한 시문, 가문에 대한 오복사상을 표현한 시문, 그리고 풍류사상에 대한 시문으로 분류할 수 있었다. 셋째, 여음산방의 건축물의 배치와 공간구성의 특징을 분석해 본 결과, 부지 한가운데 사당건물(善言?公)을 중심으로 남쪽에 펼쳐진 공간은 주로 거주하는 공간이며, 북쪽에 펼쳐진 공간은 주로 제사와 관련된 공간이었다. 넷째, 여음산방의 공간구성요소를 분석해 본 결과이다. 정자부분은 원림에 지정(池亭)인 한취정(閒趣亭), 후화원(後花園)에 유상곡수연을 표현한 계상정(?賞亭), 독특한 반정(半亭) 형태인 내훈정(來熹亭) 등을 조영한 것으로 나타났다. 다섯째, 여음산방에는 형태가 매우 다양한 연못을 5개소 조성하였으며 기학적인 경계선을 가지는 것은 특징이다. 여섯째, 여음산방의 석가산은 괘방청산(掛榜靑山)이라고 하였는데, 과거시험에 합격한 사람의 이름을 적어서 붙이는(괘방) 곳이 곧, 이 석가산(청산)이라는 의미를 갖고 있다. 일곱째, 여음산방의 화창은 나무로 만든 문격창(紋格?)과 격단창(隔斷?) 등이 특징이며, 색채유리창(色彩?璃?)은 쑤저우 원림과 또 다른 차이점을 보이고 있다. 여덟째, 동문 양식은 쑤저우 고전원림의 동문 양식에 비해 다양하지 않은 편이지만, 동문 전면(前面)에 적혀있는 시문 장식물의 다양한 형태와 화려한 색채가 특징이다. 아홉째, 여음산방 원림에 설치된 건물장식용 조각예술품들이 표현된 주제를 분류해 보면 길상, 문자, 도교 팔선, 동식물, 설화와 기타 등으로 분류할 수 있다. 마지막으로 여음산방에 식재된 수목들은 주로 아열대식물이고 이중에 상징적 의미를 가진 수목도 있으며, 날씨가 좋기 때문에 과일나무를 많이 심었다.