• Title/Summary/Keyword: 1m DEM

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Moglichkeit der Unterklassifikation des Sprechakttyps und deren Probleme (화행 유형의 하위분류 가능성과 그 문제점)

  • Kang Chang-Uh
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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    • v.9
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    • pp.195-215
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    • 2004
  • In der vorliegenden Arbeit wird die $M\"{o}glichkeit$ der Unterklassifikation des Sprechakttyps untersucht. Zur Klassifikation von Sprechakten hat Searle (1969) $zw\"{o}lf$ Kriterien vorgeschlagen, und mit den folgenden drei Kriterien hat er funf Sprechaktklassen herausgearbeitet: $illokution\"{a}rer$ Zweck, Entsprechungsrichtung und psychologischer Zustand. Bei der Unterklassifikation dieser $f\"{u}nf$ Sprechaktklassen $k\"{o}nnen$ aber die von Searle vorgeschlagenen Klassifikationskriterien kaum gebraucht werden, so dass zur Unterklassifikation jeder Sprechaktklasse neue Kriterien $eingef\"{u}hrt$ werden mussten. Dabei stellt sich die Frage, was als Unterklassifikationskriterien dienen und wie ausdifferenziert eine Spreckaktklasse bzw. ein Sprechakttyp unterklassifiziert werden kann. Im 1. Kapitel werden neben den Klassifikationskriterien von Searle die Kriterien, die in den bisherigen Unterklassifikationen der Sprechaktklassen verwendet wurden, kritisch betrachtet. Im 2. Kapitel wird auf die Frage der Ausdifferenzierungsgrenze $n\"{a}her$ eingegangen, wobei diskutiert wird, ob die Unterklassifikation der Fragehandlung von Hindelang (1981) und die des Insistierens von Franke (1990) genugend ausdifferenziert sind oder es noch $M\"{o}glichkeiten$ besteht, sie noch weiter auszudifferenzieren. Die Frage nach der Ausdifferenzierungsgrenze ist mit der Frage gleichzusetzen, inwieweit eine Sprechhandlung ohne Verlust ihres Handlungscharakters in Untertypen zerlegt werden kann. Um diese Frage zu beantworten, wird der Begriff 'Basishandlung' $eingef\"{u}hrt$, den von Wright (1974) im Rahmen seiner Theorie der Kausalitat entwickelt hat. In Analogie zu diesem Begriff wird der Begriff 'Basis-Sprechhandlung' vorgeschlagen und wie folgt definiert: 1. Obere Grenze: Eine Basis-Sprechhandlung ist die Sprechhandlung, die nicht durch den Vollzug der anderen Sprechhandlungen ausgefuhrt werden kann. 2. Untere Grenze: Durch eine $\"{A}u{\ss}erung$ bzw. einen Teil der $\"{A}{\ss}erung$ kann nur dann eine Basis-Sprechhandlung vollzogen werden, wenn sieler eine $\"{A}nderung$ des Wissens oder der Handlung des $H\"{o}rers$ $herbeif\"{u}hrt$. Diese These wird anhand der Beispiele $\"{u}berpr\"{u}ft$, deren kommunikative $Selbst\"{a}ndigkeit$ schon durch andere Studien $best\"{a}tigt$ wurde. Als weiteres Kriterium zur Entscheidung $\"{u}ber$ die $M\"{o}glichkeit$ der Unterklassifikation wird im 4. Kapitel der Begriff 'kommunikativer Zweck' $eingef\"{u}hrt$ und $dar\"{u}ber$ diskutiert, wie der kommunikative Zweck der Untertypen einer Sprechaktklasse bzw. eines Sprechakttyps definiert und beschrieben werden kann. Dabei wird festgestellt, dass er durch die Spezifizierung des kommunikativen Zwecks der Sprechaktklasse bzw. des Sprechakttyps, zu der/zu dem die Untertypen $geh\"{o}ren$, definiert und beschrieben werden kann, wobei die semantischen, die kontextuellen und die sitiativen Aspekte $mitbe\"{u}cksichtigt$ werden sollen.

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High Utilization of Photovoltaic Power System in Rural Green Village Location Analysis and Evaluation using GIS - With Chubumyeon, Keumsan, Chungnam province - (GIS를 이용한 태양광 발전시스템의 활용도 높은 농촌 그린빌리지 적정입지 평가 - 충청남도 금산군 추부면을 중심으로 -)

  • Doh, Jae-Heung;Kim, Dae-Sik;Koo, Hee-Dong
    • Journal of Korean Society of Rural Planning
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    • v.20 no.1
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    • pp.51-62
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    • 2014
  • The composition of rural Green Village requires higher utilization of renewable energy in those selected rural villages. The purpose of this study is to select the best results of rural green villages when using photovoltaic power system(PV system). 10 different rural villages in Chubumyeon, Keumsan, Chungnam province, were selected as study villages. This study shows measured solar radiation data, a 20-year time series data, and GIS spatial analysis; and whose were used to predict the photovoltaic power generation. PV system is used as a form with capacity of 3kWp to use for personal and public houses. Generation data was calculated by the town, where the economics of the Green Village location analysis was performed; and the solar radiation's correction factor was calculated by the 20-year time series data and measured data by study villages. By applying to the data of DEM, slope and aspect of the study villages were found, therefore performed. Spatial analysis tools were performed by using solar radiation map's tools. Those data found were used to calculate the average needed energy every months. When used the properly calculated data, towns performed economical energy consumption in rural Green Village. Every study villages have showed very high potential for PV system. Sungdangri ranked at the first (7,401kWp/year), Jangdaeri follows behind to the second (7,203kWp/year) and Yogwangri at third (7,89kWp/year) which shows higher developed energy than other study villages. The areas covered of these three towns are as follows: Sungdangri at $33,300m^2$, Jangdaeri covers $18,000m^2$ and Yogwangri shows $46,800m^2$. With these results, analyzing the potentials using GIS spatial analysis before installation of PV system was possible. Also different villages and topography in study villages have showed various results by the area. For convenience and to shorten research time, it is possible and enough to use solar radiation tools when studying spatial analysis of solar radiation.

A Study on the Reduction of Non-Point Source Pollution loads from Small Agricultural Watershed by Applying Surface Covering Scenario using HSPF Model (HSPF 모델을 이용한 지표피복 시나리오 적용에 따른 농촌 소유역에서의 비점원오염 저감연구)

  • Jung, Chung-Gil;Park, Jong-Yoon;Kim, Sang-Ho;Kim, Seong-Joon
    • Proceedings of the Korea Water Resources Association Conference
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    • 2012.05a
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    • pp.103-103
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    • 2012
  • 본 연구에서는 시험포장($1276.6m^2$)에서의 지표피복 BMPs (Best Management Practices) 시나리오를 적용하여 얻은 평균 유출저감율을 HSPF 모델에 적용하여 유역차원에서의 비점원오염 저감효과를 평가하고자 한다. 본 연구에서는 별미천 유역($1.21km^2$)을 대상으로 모형의 적용을 위한 입력자료로 기상자료와 지형자료를 구축하였으며 기상자료로 수원, 양평, 이천 기상관측소 자료를 구축하였으며, 지형자료로 격자크기 2m의 DEM (Digital Elevation Model)과 토지이용도는 2006년 5월 1일 QuickBird 영상을 제공받아 기존 환경부, 건교부, USGS의 토지피복분류체계 및 현장조사를 통하여 QuickBird 영상으로부터 추출 가능한 정밀농업정보에 대한 항목을 결정하였으며, 정사보정된 QuickBird 영상을 스크린 디지타이징 기법(On-Screen Digitizing Method)을 이용하여 총 21개 토지이용항목의 정밀토지이용도를 구축하였다. 실제모니터링으로 측정된 자료를 바탕으로 수위-유량곡선 산정 및 오염부하곡선을 선정, 2011년 6월 8일부터 10월 31일 분석기간으로 HSPF 모델링을 실시하였으며 모의결과 월별 통계에 따른 적용성 분석으로 RMSE (Root Mean Square Error) 는 1.15 ~ 1.76(mm/day), $R^2$는 0.62 ~ 0.78, Nash-Sutcliffe model efficiency (NSE)는 0.62 ~ 0.76로 모의치는 실측치와 유의성이 있는 것으로 분석되었다. 또한, Sediment, T-N, T-P의 $R^2$는 각각 0.72, 0.62, 0.63으로 상관성을 보이는 것으로 분석되었다. 시험포장으로부터 얻어진 event별 볏짚을 이용한 지표피복시나리오적용 후 밭에서의 평균 유출 약 10 % 유출율 감소 조건과 실제 평균 비점원오염 저감효과 89.7 % ~ 99.4 %의 결과로부터 지표피복효과의 침투효과를 HSPF 모델로 적용하기 위해 침투량(INFILT)를 조절하여 평균유출 약 10 %가 감소되는 16.0 mm/hr 값을 선정하였다. 그 결과, Sediment. T-N, T-P의 평균 저감율은 각각 87.2 %, 28.5 %, 85.1 %로 나타났으며 이는 시험포장에서의 실제 평균 비점오염 저감효과 89.7 % ~ 99.4 %에 근접함을 알 수 있었다. 이 결과로부터 침투량 조절에 따른 지표피복(침투짚단)효과는 Sediment, T-P에서 저감효율이 80 % 이상으로 높았지만 T-N은 약 30 %로 낮은 저감율을 보임으로써 저감효과가 크지 않음을 나타냈다.

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Experimental Study on Helical Turbine Efficiency for Tidal Current Power Plant (조류 발전용 헬리컬 수차의 효율에 대한 실험적 연구)

  • Han, Sang-Hun;Lee, Kwang-Soo;Yum, Ki-Dai;Park, Woo-Sun;Park, Jin-Soon;Yi, Jin-Hak
    • Proceedings of the Korea Water Resources Association Conference
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    • 2006.05a
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    • pp.530-534
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    • 2006
  • 조류발전은 조류 유속이 빠른 곳에 수차발전기를 설치하여 해수의 운동에너지로부터 전기를 생산하는 발전방식이다. 2001년부터 해양연구원에서는 울돌목의 우수한 조류발전 개발 여건을 바탕으로 조류에너지 실용화 기술을 개발하고 있다. 본 연구에서는 조류발전 시스템에 사용되는 헬리컬 수차의 효율을 현장실험을 바탕으로 판단하고자 하였다. 현장실험을 위하여 지름 2.2 m, 높이 2.5 m의 수차를 제작하고, 울돌목 협수로의 한 쪽 면에 쟈켓구조물을 설치하여 수차를 거치한다. 수차가 회전함에 따라 회전봉에 일정 마찰을 주어 토크와 RPM을 측정하고, 함께 측정된 유속자료를 이용하여 수차를 효율을 산정한다. 유속-수차효율, TSR(수차의 날개속도와 유속의 비)-수차효율의 상관관계로 실험결과를 고찰하였다. 1중 날개 수차인 경우에 유속 1.4에서 2.6 m/s 사이에서 최대효율이 30 - 35 % 정도였고, 2중 날개 수차에 대한 실험에서는 유속 1.4에서 2.6 m/s 사이에서 최대수차효율이 25 - 35 % 사이임을 알 수 있었다. TSR과 최대수차효율의 상관관계는 실험 case별로 조금씩 다르다. 전체적으로 1중 날개의 경우가 최대수차효율에서 2중 날개보다 TSR 값이 조금 큰 경향을 나타냄을 알 수 있다. 이것은 1중 날개가 2중 날개보다 가벼워 좀 더 큰 RPM을 발생시켜서 나타난 현상으로 생각된다. 현재의 실험결과들을 이용하여 TSR과 최대수차효율을 상관관계를 나타내는 모델식을 도출하였다. 현장시험결과를 종합하면, 현장조류발전 시설이 최소 600 kW의 전력이 생산되기 위해서는 지름 3 m, 높이 3.6 m 인 수차 3개가 하나의 축에 설치되어야하는 것으로 계산되었다. 정격유속이 4.8 m/s이고 수차의 지름이 3m 라면, 최적 전력발생시의 RPM은 1중 날개의 경우 79이고 2중 날개의 경우는 63정도임을 추정할 수 있었다.촬영하여 실시간으로 전송하기 때문에 홍수시 하천 상황에 대한 모니터링 목적으로 사용될 수 있다. 영상수위계는 우물통 등을 이용하는 기존 방법과 비교하여 구조물이 필요 없어 설치 비용이 저렴하고, 영상에 의한 하천 모니터링 기능을 자체적으로 가지고 있기 때문에 효율적이라고 할 수 있다.따른 4개의 평가기준과 26개의 평가속성으로 이루어진 2단계 기술가치평가 모형을 구축하였으며 2개의 개별기술에 대한 시범적용을 실행하였다.하는 것으로 추정되었다.면으로의 월류량을 산정하고 유입된 지표유량에 대해서 배수시스템에서의 흐름해석을 수행하였다. 그리고, 침수해석을 위해서는 2차원 침수해석을 위한 DEM기반 침수해석모형을 개발하였고, 건물의 영향을 고려할 수 있도록 구성하였다. 본 연구결과 지표류 유출 해석의 물리적 특성을 잘 반영하며, 도시지역의 복잡한 배수시스템 해석모형과 지표범람 모형을 통합한 모형 개발로 인해 더욱 정교한 도시지역에서의 홍수 범람 해석을 실시할 수 있을 것으로 판단된다. 본 모형의 개발로 침수상황의 시간별 진행과정을 분석함으로써 도시홍수에 대한 침수위험 지점 파악 및 주민대피지도 구축 등에 활용될 수 있을 것으로 판단된다. 있을 것으로 판단되었다.4일간의 기상변화가 자발성 기흉 발생에 영향을 미친다고 추론할 수 있었다. 향후 본 연구에서 추론된 기상변화와 기흉 발생과의 인과관계를 확인하고 좀 더 구체화하기 위한 연구가 필요할 것이다.게 이루어질 수 있을 것으로 기대된다.는 초과수익률이 상승하지만, 이후로는 감소하므로, 반전거래전략을 활용하는 경우 주식투자기간은 24개월이하의 중단기가 적합함을 발견하였다. 이상의 행태적 측면과 투자성과측면의 실증결과를 통하여 한국주식시장에 있어서 시장수익률을 평균적으로 초과할 수 있는 거래전략은 존재하므로 이러한 전략을 개발 및 활용할 수 있으며, 특히, 한국주식시장에 적합한 거래전략은 반전거래전

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Vertrauen und Misstrauen in der horizontal arbeitsteiligen Medizin (수평적 분업의료에 있어서 신뢰와 불신)

  • Kim, Min-Joong
    • The Korean Society of Law and Medicine
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    • v.11 no.1
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    • pp.159-172
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    • 2010
  • Viele medizinische Ma$\ss$snahmen erfordern ein Zusammenwirken verschiedener $\ddot{A}$Arzte. In der arbeitsteiligen Medizin wird deutlich zwischen vertikaler und horizontaler Arbeitsteilung unterschieden. Mit dem Begriff vertikaler Arbeitsteilung geht es darum, ob ein Arzt einem anderen Weisungen erteilen kann oder nicht. Bei der Horizontalen Arbeitsteilung handelt es sich um selbst$\ddot{a}$andig t$\ddot{a}$atige Mediziner, in gleichen oder aneinander sto$\ss$senden Gebieten, bei denen man sich auf die Angaben oder die T$\ddot{a}$atigkeiten des anderen verlassen kann. Die wirkliche arbeitsteilige Medizin wird horizontal geleistet. In der arbeitsteiligen Medizin, insbesondere in der mehr und mehr spezialisierten Medizin, ist ein gewisser Grad des Vertrauens notwendig, schon aus Zeitgr$\ddot{u}$unden. Die Wiederholung aller m$\ddot{o}$oglichen diagnostischen, aber auch pr$\ddot{a}$aoperativen Untersuchungen, w$\ddot{a}$are zeitaufwendig und kostenreich. Es gibt aber auch Verh$\ddot{a}$altnisse, in denen die Kontrolle oder sogar die Wiederholung dieser Tests notwendig ist. Dann ist, insbesondere wenn sie in einer gewissen Zeitfolge t$\ddot{a}$atig werden, die Problematik des Vertrauens und Misstrauens angesprochen. Der Arzt, der von einem anderen Arzt in herk$\ddot{o}$ommlicher Weise Mitteilungen bekommt oder jedenfalls erwarten kann, darf sich grunds$\ddot{a}$atzlich auf den Vertrauensgrundsatz berufen. Das gilt insbesondere, wenn der mitteilende Arzt in einer personell und apparativ $\ddot{u}$uberlegen ausgestatteten Klinik t$\ddot{a}$atig ist. Wenn sich allerdings Zweifel an der Richtigkeit der Mitteilung aufdr$\ddot{a}$angen, etwa zahlreiche Nachl$\ddot{a}$ssigkeiten vorgekommen sind, ist f$\ddot{u}$r Vertauen kein Platz.

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How to utilize vegetation survey using drone image and image analysis software

  • Han, Yong-Gu;Jung, Se-Hoon;Kwon, Ohseok
    • Journal of Ecology and Environment
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    • v.41 no.4
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    • pp.114-119
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    • 2017
  • This study tried to analyze error range and resolution of drone images using a rotary wing by comparing them with field measurement results and to analyze stands patterns in actual vegetation map preparation by comparing drone images with aerial images provided by National Geographic Information Institute of Korea. A total of 11 ground control points (GCPs) were selected in the area, and coordinates of the points were identified. In the analysis of aerial images taken by a drone, error per pixel was analyzed to be 0.284 cm. Also, digital elevation model (DEM), digital surface model (DSM), and orthomosaic image were abstracted. When drone images were comparatively analyzed with coordinates of ground control points (GCPs), root mean square error (RMSE) was analyzed as 2.36, 1.37, and 5.15 m in the direction of X, Y, and Z. Because of this error, there were some differences in locations between images edited after field measurement and images edited without field measurement. Also, drone images taken in the stream and the forest and 51 and 25 cm resolution aerial images provided by the National Geographic Information Institute of Korea were compared to identify stands patterns. To have a standard to classify polygons according to each aerial image, image analysis software (eCognition) was used. As a result, it was analyzed that drone images made more precise polygons than 51 and 25 cm resolution images provided by the National Geographic Information Institute of Korea. Therefore, if we utilize drones appropriately according to characteristics of subject, we can have advantages in vegetation change survey and general monitoring survey as it can acquire detailed information and can take images continuously.

Utilizing Spatial Information for Landform Analysis and Web-Based Sight-Seeing Guidance of the Natural Park -A Case Study of Kumoh Mt Province Park- (자연공원의 지형분석과 웹기반 관광안내를 위한 공간정보의 활용 -금오산 도립공원을 중심으로-)

  • Lee, Jin-Duk;Choi, Young-Geun
    • Journal of Korean Society for Geospatial Information Science
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    • v.10 no.2 s.20
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    • pp.39-47
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    • 2002
  • For the purpose of data construction for the systematic management and sight-seeing guidance of the natural park, the Kumoh Mt. Province Park was selected as a pilot area. Digital topographic maps, thematic maps and satellite imagery covering the object area were processed and then landform analysis for elevation, slope, aspect and so on was conducted through DEM generation, and the landcover map and NDVI maP were extracted from Landsat TM data. The database was then constructed with these spatial data for GSIS. The image map was generated from IKONOS satellite data, which cover the pilot area data, with one meter resolution and also 3D visualization which was overlaid with main paths up a mountain were conducted. And the moving image files were produced along main paths up including main natural spectacular sights, cultural assets and management facilities. It is expected that the research result can be utilized as the fundamental data for re-assessing suitable land use and constructing Web-based guidance system.

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$\"{U}ber\;die\;koh\"{a}rente$ Resultativkonstruktion (독일어 긴밀결과구문에 대하여)

  • Choi Do-Gyu
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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    • v.1
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    • pp.141-163
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    • 1999
  • Im Rahmen der Prinzipien und Parametertheorie ist die $koh\"{a}rente$ Konstruktion umstritten in bezug auf die Frage, ob sie yon der satzwertigen, $inkoh\"{a}renten$ Konstruktion(i.e. Small Clause) herleitbar ist oder nicht. Die derivationellen Analysen wie Evakuierungsanalyse, Verbanhebungsanalyse und Reanalyse gehen von der Annahme aus, $da{\ss}\;die\;koh\"{a}rente$ Konstruktion eine von der $inkoh\"{a}renten$ Konstruktion derivierte Variation ist. Im Gegensatz dazu ist nach der Unifikationsanalyse die $koh\"{a}rente$ Konstruktion die basisgenerierte monosententiale Konstruktion. In der vorliegenden Arbeit wird versucht, die empirische und theoretische $Unad\"{a}quatheit$ der derivationellen Analysen zu zeigen. Wenn die derivationellen Analysen korrekt $w\"{a}ren,\;mu{\ss}te$ auch nach der Derivaton beim langen Passiv das Akkusativkomplement der Infinitivkonstruktion ohne Kasuskonversion bleiben. Aber in der Tat wird der Nominativkasus dem Komplement der Infinitivkonstruktion zugewiesen. In der empirischen Gesichtspunkten steht das lange Passiv nicht im Einklang rnit den derivationellen Analysen. Ferner $mu{\ss}$ nach Chomskys $\"{O}konomieprinzip$ die Derivation obligatorisch sein. Aber die derivationellen Analysen, nach denen der grammatische Satz vom grammatischen Satz deriviert wird, ist nicht obligatorisch, sondern fakultativ. Sie sind theoretisch nicht $ad\"{a}quat$. In dieser Arbeit wird die Resultativkonstruktionen als weitere $koh\"{a}rente$ Konstruktion vorgeschlagen. Dabei wird die Evidenz gegen die Small Clause Struktur, die nach den derivationellen Analysen als $urspr\"{u}ngliche$ Struktur der koharenten Konstruktion angenommen wurde, zweierlei wie folgt gezeigt: Skopus und Idiomatisierung. Wenn die Resultativkonstruktionen als Small Clause analysiert werden, kann ein Adverb innerhalb des Small Clause auftreten, das den weiten Skopus $\"{u}ber$ den Gesamtsatz hat. Aber unter der Small Clause Analyse kann $tats\"{a}chlich$ das Adverb wegen der K-Kommandobedingung keinen weiten Skopus. D.h. das Adverb kann das finite Verb nicht k-kommandieren. Idiomatisierung bildet vor der Transformation im Lexikon eine syntaktische Einheit. In der Resultativkonstruktion, die das $inh\"{a}rente$ Reflexivum enthalt, $k\"{o}nnen\;das\;Resultativpr\"{a}dikat$ und das Verb wie ein reflexives Verb analysiert werden. Aber unter der Small Clause Analyse ist Idiomatisierung des $Resultativpr\"{a}dikats\;und\;Verbs\;nicht\;m\"{o}glich$, weil sie in der D-Struktur keine syntaktische Einheit bilden.

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Utilization Plan Research of High Resolution Images for Efficient River Zone Management (효율적 하천구역관리를 위한 고해상 영상의 활용 방안 연구)

  • Park, Hyeon-Cheol;Kim, Hyoung-Sub;Jo, Yun-Won;Jo, Myung-Hee
    • Korean Journal of Remote Sensing
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    • v.24 no.2
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    • pp.205-211
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    • 2008
  • The river management in Korea had been focused on line based 2D spatial data for the developing river management application system. In this study, the polygon based 3D spatial data such as aerial photos and satellite images were selected and used through comparing their resolution levels for the river environment management. In addition, 1m detailed DEM (Digital Elevation Model) was constructed to implement the real topography information around river so that the damage area scale could be extracted for flood disaster. Also, the social environment thematic maps such as a cadastral map or land cover map could be used to verify the real damage area scale by overlay analysis on aerial photos or satellite images. The construction of these spatial data makes possible to present the real surface information and extract quantitative analysis to support the scientific decision making for establishing the river management policy. For the further study, the lidar surveying data will be considered as the very useful data by offering the real height information of riverbed as the depth of river so that flood simulation can give more reality.

Particle Dissolution Effects on Soluble Geo-Mixtures (용해성 지반혼합재의 입자 용해 영향)

  • Tran, M. Khoa;Cho, Se-Hyun;Byun, Yong-Hoon;Shin, Ho-Sung;Lee, Jong-Sub
    • Journal of the Korean GEO-environmental Society
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    • v.12 no.12
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    • pp.5-12
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    • 2011
  • Macro- and micro-behaviors of soluble granular media during dissolution process is investigated by numerical analysis. Soluble media are represented by assemblies of non-soluble particles and soluble particles with the different soluble particles contents. Dissolutions of particles are implemented by reducing sizes of soluble particles. The numerical simulations results exhibit that the vertical displacements increase to certain times and become constant while the porosities still increase until no soluble particles are present. However, the porosities and vertical displacements increase with the increase of soluble particles content. The microscopic views show that the fabrics of media change during dissolution process until the certain times, the higher soluble particles contents, and the larger change in fabric.