• Title/Summary/Keyword: historical change

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A Study on the Change of Hire Payment Method to Reduce the FFA Basis Risk (FFA 베이시스위험 축소를 위한 용선료 지급기준 변경의 타당성 검토)

  • Lee, Seung-Cheol;Yun, Heesung
    • Journal of Navigation and Port Research
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    • v.46 no.4
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    • pp.359-366
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    • 2022
  • While the Forward Freight Agreement (FFA) has emerged as an effective hedging tool since early 1990, the basis risk and cash flow distortions have been addressed as obstacles to the active use of FFAs. This research analyses the basis risk of FFAs and provides a feasible suggestion to reduce it. Basis risk is divided into timing basis, route basis, size basis, and low liquidity basis. The timing basis is defined as the difference between the physical hire, fixed on the specific contract date and the FFA settlement price, calculated by averaging spot rates for a certain period. Timing basis is considered the worst in eroding the effectiveness of FFAs. This paper suggests a change of hire payment criterion from contract date to 15-day moving average, as a means of mitigating the basis risk, and analyzed the effectiveness through historical simulation. The result revealed that the change is effective in mitigating the timing basis. This study delivers a meaningful implication to shipping practice in that the change of hire payment criterion mitigates the basis risk and eventually activates the use of FFAs in the future.

Assessment of Environmental Flow Impacts for the Gosam Reservoir According to Climate Change (기후변화에 따른 고삼저수지의 환경유량 영향평가)

  • Yoon, Tae Hyung;Kang, Ho Young;Kim, Jong Suk;Moon, Young Il
    • Journal of The Korean Society of Agricultural Engineers
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    • v.58 no.6
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    • pp.93-100
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    • 2016
  • This study conducted a quantitative assessment on the environmental flows associated with climate change in the Gosam Reservoir, Korea. The application of RCP 8.5 climate change scenario has found that the peak value of High Flow Pulses has increased by 36.0 % on average compared to historical data (2001 ~ 2010), which is likely to cause disadvantage on flood control and management but the increase in peak value is expected to make a positive impact on resolving the issue of green algal blooms, promoting vegetation in surrounding areas and encouraging spawning and providing habitats for native species by releasing a larger amount of landslides as well as organic matters than the past. However, the decreasing pattern of the peak value of High Flow Pulses is quite apparent with the trend of delay on the occurrence time of peak value, necessitating a long-term impact analysis. The peak value of Large Floods shows a clear sign of decrease against climate change scenario, which is expected to lead to changes in fish species caused by degraded quality of water and decreasing habitats. A quicker occurrence of Small Floods is also expected to make an impact on the growth cycle of aquatic plants, and the reduction in occurrence frequency of Extreme Low Flows is to contribute to increasing the population of and raising the survival rate of native fish, greatly improving the aquatic ecosystem. The results of this study are expected to be useful to establish the water environment and ecological system in adapting or responding to climate change.

Projection of Consumptive Use and Irrigation Water for Major Upland Crops using Soil Moisture Model under Climate Change (토양수분모형을 이용한 미래 주요 밭작물 소비수량 및 관개용수량 전망)

  • Nam, Won Ho;Hong, Eun Mi;Jang, Min Won;Choi, Jin Yong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.56 no.5
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    • pp.77-87
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    • 2014
  • The impacts of climate change on upland crops is great significance for water resource planning, estimating crop water demand and irrigation scheduling. The objective of this study is to predict upland crop evapotranspiration, effective rainfall and net irrigation requirement for upland under climate change, and changes in the temporal trends in South Korea. The changes in consumptive use and net irrigation requirement in the six upland crops, such as Soybeans, Maize, Potatoes, Red Peppers, Chinese Cabbage (spring and fall) were determined based on the soil moisture model using historical meteorological data and climate change data from the representative concentration pathway (RCP) scenarios. The results of this study showed that the average annual upland crop evapotranspiration and net irrigation requirement during the growing period for upland crops would increase persistently in the future, and were projected to increase more in RCP 8.5 than those in RCP 4.5 scenario, while effective rainfall decreased. This study is significant, as it provides baseline information on future plan of water resources management for upland crops related to climate variability and change.

Change of the Age of TV Cooking Programs (TV 요리 프로그램의 시대적 변화에 대한 연구)

  • Chung, Tae-Sub
    • The Journal of the Korea Contents Association
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    • v.19 no.6
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    • pp.379-386
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    • 2019
  • It is a study of the changing times of cooking programs that were broadcast and aired on TV. The media has shown a lot of changes in appearance, and it's also showing a lot We want to look at various changes and changes in the times through programs on cuisine and food that many people now prefer. In the preceding study, we looked at changes in media formats and changes in social changes and programs until the 2000s. Based on this analysis, the changes of the cooking program were analyzed according to the changes of the times. For the purpose of this study, changes were divided into cooking and historical changes, which were divided and examined by the period. Through this study, we were able to see the change in the cooking program in an era where changes in diet are mixed with changes in culture. It was possible to see the change through programs that consumers could feel, not unilateral delivery of information, and to see the change from the era of experts to culture. Further, through the introduction and challenge of local culture through food, subsequent research aims to see changes and social phenomena caused by the division of programs.

The Influence of Dark Tourism Visitors' Motivation, Authenticity, Emotion, Satisfaction and Attitude Change: Focus on Seodaemun Prison History Hall (다크투어리즘 방문동기가 진정성, 감정, 만족 및 태도변화에 미치는 영향: 서대문형무소역사관을 중심으로)

  • Kim, Ju-Yeon;Choi, Hyun-Joo
    • The Journal of the Korea Contents Association
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    • v.21 no.3
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    • pp.194-204
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    • 2021
  • The purposes of the study were two-folded: to identify visitors' motivations for the history-based dark tourism and to test empirically the relationships among visitors' motivations, authenticity, emotion, satisfaction and attitude change. The online survey was conducted, from August 3rd to 20th of 2020, on visitors over 15 years old with previous experience with dark tourism within last three years. 347 individuals responded to the online survey. The study results were as follows: first, among four dark tourism visiting motivation including, motivation to research, historicalness, deviation, and self-examination, first two variables motivation to research and historicalness showed positive effect on authenticity and emotion. Second, the study found that visitors' satisfaction influenced positively towards attitude change. Finally, authenticity and emotion positively influenced attitude change. This study empirically suggests a change in attitude toward history due to the dark tour. Since historicality has been shown to have a significant influence on the attitude of history through authenticity and emotion, it is necessary to strengthen story-based experience programs at historical sites.

A Case Study on the Service Programs at the Presidential Library and Museum (대통령 기록관의 서비스 프로그램 사례 연구)

  • Jo, Min-Ji
    • Journal of Korean Society of Archives and Records Management
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    • v.6 no.2
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    • pp.157-184
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    • 2006
  • Presidential records which have produced during a presidency as a national center are the evidence of the presidency and main historical records. We have the responsibility to establish fundamental systems to produce such main historical records and to manage such main historical records which could help people and history to judge the presidency based upon the evidence of their activities. The historical appraisal could be achieved not by memory but by evidence. A draft of a proposed law on the management of presidential records which includes the establishment of presidential libraries for the presidential records Mecca is being moored at the National Assembly now. The presidential library is to be considered as a multi-functional national institution which is carrying out the role as an Archives, Museums and Center for the education. In addition, it is imperative for a presidential library to provide user-oriented services to enrich the usability and the value of records, recognizing the change of administration paradigm from a supplier-oriented system to a customer-oriented system. This dissertation, in order to develop presidential library service programs focusing on customers rather than the convenience of administration, reviewed programs of the U.S. presidential libraries as a developed case and proposes guidelines and applicable samples for the development of the Korean presidential library service programs.

A Study on the Humanities of the Placeness and Local cuisine in Busan (부산의 장소성과 향토음식에 대한 인문학적 고찰)

  • Ryu, Jina
    • 지역과문화
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    • v.6 no.4
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    • pp.1-21
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    • 2019
  • This study focused at the local and historical characteristics of Busan from the perspective of local culture, along with the local characteristics of Busan. Busan's local cuisine has been reborn and continues to this day, influenced by the geographical and historical characteristics of the place. Places are not merely spatial points marked by coordinates, but are also semantics that include the human experience and emotional aspects of living in them. A place is a mix of culture, a human response to the visible environment and the environment. An understanding of a place provides a basis for understanding personal geography, culture, and history. .One of the specialties of an area with its location is the local cuisine. Local cuisines are not immutable, as they can change according to the characteristics of the area and the preferences of the residents. Busan's local cuisines reflect the geographical features of the city, and include Busan's historical experiences. First, anchovies and eel are well known for their location as ports bordering the sea. Second, Dongnae Pajeon and Sanseong Makgeolli are made using marine products and grains. Thirdly, during Japanese occupation, fish cake and sliced raw fish was enjoyed by residence in Busan. And finally, Milmyun and Pork Soup, the food made by refugees who came down to Busan and settled down during the 1·4 retreat. The local cuisine, which represents an area, goes beyond simply being eaten, enjoyed, and consumed as a commodity, and is a symbol of the geographical and historical characteristics of the area.

On the Bibliographies of Chinese Historical Books - Classifying and cataloguing system of six historical bibliographies - (중국의 사지서목에 대하여 -육사예문$\cdot$경적지의 분류 및 편목체재 비교를 중심으로-)

  • Kang Soon-Ae
    • Journal of the Korean Society for Library and Information Science
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    • v.24
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    • pp.289-332
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    • 1993
  • In china, six bibliographies of offical historical books are evaluated at the most important things among the systematically-editing bibliographies. These bibliographies would be usful to study the orign of classical sciences and their development, bibliographic research of Chinese classics, bibliographic judgement on genuine books, titles, authors, volumes. They could be refered to research into graving, correcting, and existence of ancient books. therefore, these bibliographies would be applied to estimation the phase of scientific and cultural development. The study of these bibliographies has been not yet made in Korea. This thesis lays its importance on the background of their appearance, their classification norms, organizing system of their catalogue, and comparison between their difference. 1. Editing and compiling of Chilyak (칠약) by Liu Chin (유흠) and official histories played an important role of entering an apperance of historical book's bibliographies. Chilyak has been lost. However, its classification and compiling system of classical books would be traced by Hansoyemunji(한서예문지) of which basic system is similar to Chilyak. It classified books according to their scientific characteristic. If a few books didn't have their own categories, they were combined by the circles parallel to the books' characteristic. With the books classified under the same scientific characteristic, they were again divided into the scientific schools or structures. It also arranged the same kinds of books according to the chronology. The some books wi th duplicate subjects were classified multiplely by their duplicate subject. 2. Ssu-ma Chon's (사마천) The Historical Records (Saki, 사기) and Pan Ku's (반고) The History of the Former Han Dynasty (Hanso, 한서) has also took effects on appearance of historical books' bibliographies. Covering overall history, Saki was structured by the five parts: The basic annals(본기), the chronological tables (표), the documents (서), the hereditary houses (세가), biographies (열전). The basic annals dealt with kings and courts' affairs according to the chronology. The chronological tables was the records of the annals. The documents described overall the social and cultural systems. The hereditary houses recorded courts' meritorious officials and public figures. The biographies showed exemplars of seventy peoples selected by their social status. Pan Ku(반구)'s The History of the Former Han Dynasty(한서) deserved to be called the prototype for the offical histories after Saki's (사기; The Historical Records) apperance. Although it modelled on Saki, it had set up its own cataloguing system. It was organized by four parts; the basic annals (본기), the chronological tables (표), treatises(지), biographies (열전). The documents in the Hanso(한서) was converted into treatises(지). The hereditary houses and biographies were merged. For the first time, the treatise with The Yemunji could operate function for historical bibliographies. 3. There were six historical bibliographies: Hansoyemunji(한서예문지), Susokyongjeokji (수서경적지), Kudangsokyongjeokji(구당서경적지), Shindangsoyemunji (신당서예문지), Songsayemunji (송사예문지), Myongsayemunji (명사예문지). 1) Modelling on Liu Chin's Chilyak except Chipryak(집략), Hansoyemunji divided the characteristic of the books and documents into six parts: Yukrye(육예), Cheja(제자), Shibu(시부), Pyongsoh(병서), Susul(수술), Pangki(방기). Under six parts, there were thirty eight orders in Hansoyemunji. To its own classification, Hansoyemunji applied the Chilyak's theory of classification that the books or documents were managed according to characteristic of sciences, the difference of schools, the organization of sentences. However the overlapped subjects were deleted and unified into one. The books included into an unsuitable subject were corrected and converted into another. The Hansoyemunji consisted of main preface (Taesoh 대서), minor preface (Sosoh 소서) , the general preface (Chongso 총서). It also recorded the introduction of books and documents, the origin of sciences, the outline of subjects, and the establishment of orders. The books classified by the subject had title, author, and volumes. They were rearranged by titles and the chronological publication year. Sometimes author was the first access point to catalogue the books. If it was necessary for the books to take footnotes, detail notes were formed. The Volume number written consecutively to order and subject could clarify the quantity of books. 2) Refering to Classfication System by Seven Norms (칠분법) and Classification System by Four Norms(사분법), Susokyongjeokji(수서경적지) had accomplished the classification by four norms. In fact, its classification largely imitated Wanhyosoh(완효서)'s Chilrok(칠록), Susokyongjeokji's system of classification consisted of four parts-Kyung(경), Sa(사), Cha(자), Chip(칩). The four parts were divided into 40 orders. Its appendix was again divided into two parts, Buddihism and Taiosm. Under the two parts there were fifteen orders. Totally Susokyongjeokji was made of six parts and fifty five orders. In comparison with Hansoyemunji(한서예문지), it clearly showed the conception of Kyung, Sa, Cha, Chip. Especially it deserved to be paid attention that Hansoyemunji laied history off Chunchu(춘추) and removed history to Sabu(사부). However Chabu(사부) put many contrary subjects such as Cheja(제자), Kiye(기예), Sulsu(술수), Sosol(소설) into the same boundary, which committed errors insufficient theoretical basis. Anothor demerit of Susokyongjeokji was that it dealt with Taiosm scriptures and Buddism scriptures at the appendix because they were considered as quasi-religion. Its compilation of bibliographical facts consisted of main preface(Taesoh 대서), minor preface(Sosoh 소서), general preface (Chongsoh 총서), postscript (Husoh 후서). Its bibliological facts mainly focused on the titles. Its recorded authors' birth date and their position. It wrote the lost and existence of books consecutive to total number of books, which revealed total of the lost books in Su Dynasty. 3) Modelling on the basis of Kokumsorok(고분서록) and Naewaekyongrok(내외경록), Kudangsokyongjeokji(구당서경적지) had four parts and fourty five orders. It was estimated as the important role of establishing basic frame of classification by four norms in classification theory's history. However it had also its own limit. Editing and compling orders of Kudangsokyongjeokji had been not progressively changed. Its orders imitated by and large Susokyongjeokji. In Its system of organizing catalogue, with its minor preface and general preface deleting, Kudangsokyongjeokji by titles after orders sometimes broke out confusion because of unclear boundaries between orders. 4) Shindangsoyemunji(신당서예문지), adding 28,469 books to Kudangsokyongjeokji, recorded 82,384 books which were divided by four parts and fourty four orders. In comparison with Kudangkyongjeokj, Sindangsoyemunji corrected unclear order's norm. It merged the analogical norms four orders (for instance, Kohun 고훈 and Sohakryu 소학류) and seperated the different norms four orders (for example, Hyokyong 효경 and Noneuhryu 논어류, Chamwi 참위 and Kyonghaeryu 경해류, Pyonryon 편년 and Wisaryu 위사류). Recording kings' behaviors and speeches (Kikochuryu 기거주류) in the historical parts induced the concept of specfication category. For the first time, part of Chipbu (집부) set up the order of classification norm for historical and literatural books and documents (Munsaryu 문사류). Its editing and compiling had been more simplified than Kudangsokyongjeokji. Introduction was written at first part of bibliographies. Appendants except bibliographic items such subject, author, title, volume number, total were omitted. 5) Songsayemunji(송사예문지) were edited in the basis of combining Puksong(북송) and Namsong(남송), depending on Sabukuksayemunji(사부국사예문지). Generally Songsayemunji had lost a lot of bibliographical facts of many books. They were duplicated and wrongly classified books because it committed an error of the incorrectly annalistic editing. Particularly Namsong showed more open these defaults. Songsayemunji didin't include the books published since the king Youngchong(영종). Its system of classification was more better controlled. Chamwiryu(참위류) in the part of Kyongbu(경부) was omitted. In the part of history(Sabu 사부), recordings of kings' behaviors and speeches more merged in the annals. Historical abstract documents (Sachoryu 사초류) were seperately arranged. In the part of Chabu(자부), Myongdangkyongmaekryu(명당경맥류) and Euisulryu(의술류) were combined. Ohangryu(오행류) were laied off Shikuryu(시구류). In the part of Chipbu(집부), historical and literatural books (Munsaryu 문사류) were independentely arranged. There were the renamed orders; from Wisa(위사) to Paesa(패사), Chapsa (잡사) to Pyolsa(열사), Chapchonki(잡전기) to Chonki(전기), Ryusoh(류서) to Ryusa(류서). Introduction had only main preface. The books of each subject catalogued by title, the volume number, and author and arranged mainly by authors. Annotations were written consecutively after title and the volume number. In the afternote the number of not-treated books were revealed. Difference from Singdangsohyemunji(신당서예문지) were that the concept and boundary of orders became more clearer. It also wrote the number of books consecutive to main subject. 6) Modelling on Chonkyongdangsomok (경당서목), Myongsayemunji(명사예문지) was compiled in the basis of books and documents published in the Ming Danasty. In classification system, Myongsayemunji partly merged and the seperated some orders for it. It also deleted and renamed some of orders. In case of necessity, combining of orders' norm was occured particulary in the part of Sabu(사부) and Chabu(자부). Therefore these merging of orders norm didn't offer sufficient theretical background. For example, such demerits were seen in the case that historical books edited by annals were combined with offical historical ones which were differently compiled and edited from the former. In the part of Chabu(자부), it broke out another confusion that Pubga(법가), Meongga(명가), Mukga(묵가), Chonghweongka's(종횡가) thoughts were classified in the Chapka(잡가). Scriptures of Taiosim and Buddhism were seperated from each other. There were some deleted books such as Mokrokryu(목록류), Paesaryu(패사류) in the part of history (Sabu 사부) and Chosaryu(초사류) in the part of Chipbu(집부). The some in the each orders had been renamed. Imitating compiling system of Songsayemunji(송사예문지), with reffering to its differ-ence, Myongsayemunji(명사예문지) wrote the review and the change of the books by author. The number of not-treated books didn't appear at the total. It also deleted the total following main subject.

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Water and Salt Budgets for the Yellow Sea

  • Lee, Jae-Hak;An, Byoung-Woong;Bang, Inkweon;Hong, Gi-Hoon
    • Journal of the korean society of oceanography
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    • v.37 no.3
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    • pp.125-133
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    • 2002
  • Water and salt budgets in the Yellow Sea and Bohai are analyzed based on the historical data and CTD data collected recently using box models. The amounts of volume transport and of water exchange across the boundary between the Yellow and East China Seas are estimated to be 2,330-2,840 $\textrm{km}^3$/yr and 109-133 $\textrm{km}^3$/yr, respectively, from the one-layer box model. Corresponding water residence time is 5-6 years. In the Bohai, water residence time is twice as long as that in the Yellow Sea, suggesting that the Yellow Sea and Bohai cannot be considered as a single system in the view of water and salt budgets. The results indicate that water and salt budgets in the Yellow Sea depend almost only on the water exchange between the Yellow and East China Seas. The computation with the coupled two-layer model shows that water residence time is slightly decreased to 4-5 years for the Yellow Sea. In order to reduce uncertainties for the budgeting results the amount of the discharge from the Changjiang that enters into the Yellow Sea, the vertical advection and vertical mixing fluxes across the layer interface have to be quantified. The decreasing trend of the annual Yellow River outflow is likely to result that water residence time is much longer than the current state, especially for the Bohai. The completion of the Three Gorges dam on the Changjiang may be change the water and salt budgets in the Yellow Sea. It is expected that cutting back the discharge from the Changjiang by 10% through the dam would increase water residence time by about 10%.

Some issues on the downscaling of global climate simulations to regional scales

  • Jang, Suhyung;Hwang, Manha;Hur, Youngteck;Kavvas, M. Levent
    • Proceedings of the Korea Water Resources Association Conference
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    • 2015.05a
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    • pp.229-229
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    • 2015
  • Downscaling is a fundamental procedure in the assessment of the future climate change impact at regional and watershed scales. Hence, it is important to investigate the spatial variability of the climate conditions that are constructed by various downscaling methods in order to assess whether each method can model the climate conditions at various spatial scales properly. This study introduces a fundamental research from Jang and Kavvas(2015) that precipitation variability from a popular statistical downscaling method (BCSD) and a dynamical downscaling method (MM5) that is based on the NCAR/NCEP reanalysis data for a historical period and on the CCSM3 GCM A1B emission scenario simulations for a projection period, is investigated by means of some spatial characteristics: a) the normalized standard deviation (NSD), and b) the precipitation change over Northern California region. From the results of this study it is found that the BCSD method has limitations in projecting future precipitation values since the BCSD-projected precipitation, being based on the interpolated change factors from GCM projected precipitation, does not consider the interactions between GCM outputs and local geomorphological characteristics such as orographic effects and land use/cover patterns. As such, it is not clear whether the popular BCSD method is suitable for the assessment of the impact of future climate change at regional, watershed and local scales as the future climate will evolve in time and space as a nonlinear system with land-atmosphere feedbacks. However, it is noted that in this study only the BCSD procedure for the statistical downscaling method has been investigated, and the results by other statistical downscaling methods might be different.

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