• 제목/요약/키워드: settled

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펌프준설에 의한 준설토의 체적변화에 관한 연구 (A Study on Bulking Change of Dredged Soils by Pump Dredger)

  • 김찬수;윤길림;박흥규
    • 한국지반환경공학회 논문집
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    • 제5권4호
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    • pp.5-11
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    • 2004
  • 오랜 기간동안 자연 상태로 퇴적되어 있는 퇴적토를 펌프준설의 방법으로 준설할 때, 안정상태의 퇴적토는 준설되는 과정에서 교란되어 침강을 촉진시키는 응결제 및 응집제를 투입하더라도 자연 상태의 퇴적토와 준설토 사이에는 필연적으로 체적변화가 발생한다. 본 연구는 동해안 속초에 위치한 석호인 영랑호의 준설토를 대상으로 실내실험을 하였으며, 준설토의 함니율 변화, 응집제 및 응결제 투입량 변화에 따른 체적변화율을 정량적으로 분석하였다. 실험결과 최적 약품첨가의 경우 준설토의 체적변화율은 평균 1.69배 증가하는 것으로 파악되었다.

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C.G.S에 의한 기초지반보강효과에 관한 연구 (A Study on the Ground Improvement by Compaction Grouting System)

  • 천병식;여유현;최현석;오일석
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 1999년도 연약지반처리위원회 학술세미나
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    • pp.1-13
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    • 1999
  • The use of Compaction Grouting evolved in the 1950's to correct structural settlement of buildings. Over the almost 50 years, the technology has developed and is currently used in wide range of applications. Compaction Grouting, the injection of a very stiff, 'zero-slump' mortar grout under relatively high pressure, displaces and compacts soils. It can effectively repair natural or man-made soil strength deficiencies in variety of soil formations. Major uses of Compaction Grouting include densifying loose soils or fill voids caused by sinkholes, poorly compacted fills, broken utilities, improper dewatering, or soft ground tunneling excavation. Other application include preventing liquefaction, re-leveling settled structures, and using compaction grout bulbs as structural elements of minipiles or underpinning. The technique replaced slurry injection, or 'pressure grouting', as the preferred method of densification grouting. There are several reasons for the increased use of Compaction Grouting which can be summarized in one word: CONTROL. The low slump grout and injection processes are usually designed to keep the grout in a homogeneous mass at the point of injection, while acceptable in some limited applications, tends to quickly get out of control. Hydraulic soil fracturing can cause extensive grout travel, often well beyond the desired treatment zone. So, on the basis of the two case history constructed in recent year, a study has been peformed to analyze the basic mechanism of the Compaction Grouting and verify the effectiveness of the ground improvement using some test methods.

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국제상사계약에서 신의칙의 법적 기능과 판정례에 관한 고찰 (A Study on the Legal Function and Cases of Good Faith under International Commercial Contracts)

  • 심종석
    • 무역상무연구
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    • 제43권
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    • pp.3-23
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    • 2009
  • The meaning of Good faith is honest intent to act without taking an unfair advantage over another person or to fulfill a promise to act, even when some legal technicality is not fulfilled. The term is applied to all kinds of transactions. According to the CISG only regulated Art. 7. that is in the interpretation of this Convention, regard is to be had to its international character and to the need to promote uniformity in its application and the observance of good faith in international trade (1) and questions concerning matters governed by this Convention which are not expressly settled in it are to be settled in conformity with the general principles on which it is based or, in the absence of such principles, in conformity with the law applicable by virtue of the rules of private international law (2). In the other hand PICC is related to the good faith and fair dealing, each party must act in accordance with good faith and fair dealing in international trade (1) and the parties may not exclude or limit this duty (2). Good faith of PECL is these principles should be interpreted and developed in accordance with their purposes. In particular, regard should be had to the need to promote good faith and fair dealing, certainty in contractual relationships and uniformity of application. Further more regarding to the good faith and fair dealing, same to the PICC regulations.

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Nutrient Removal Using Fermented Organic Acids Derived from the Primary Sludge in the Intermittent Aeration Activated Sludge Process

  • Weon, Seung-Yeon;Lee, Sang-Il;Lee, Chan-Won
    • Environmental Engineering Research
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    • 제16권4호
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    • pp.213-218
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    • 2011
  • The two-stage intermittent aeration activated sludge process (IAP) and dynamic-flow intermittent aeration activated sludge process (DFP) were investigated for the nutrient removal of domestic wastewater. Three sets of IAP and one set of DFP were operated. The fermented settled sludge taken from the primary settling tank was added to two IAP and one DFP as an external electron donor, with one IAP, in which an external carbon source was not added, as a control. All the systems were operated at a sludge retention time of 20 days and a hydraulic retention time of 12 hr. A Higher denitrification rate was observed with the fermented settled sludge for the denitrification compared to the process without the addition of the organic source. The result indicates that the fermented acid from the primary domestic sludge has been proved to be an excellent electron donor for denitrification and biological phosphorus removal with IAP and DFP in treating relatively low C/N ratio(Carbon / Nitrogen ratio) wastewater. Phosphate accumulating organisms have a capability of competing with denitrifiers in the presence of volatile organic acids under anoxic conditions.

조선조 숙종대 혼전조성과 그 특징에 관한 연구 - 창경궁 문정전을 중심으로 - (The Study on the Character and Formation of the Honjeon during the Reign of Sukjong in Joseon Dynasty - Centering on Munjeongjeon in ChangkyeongGung -)

  • 신지혜
    • 건축역사연구
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    • 제19권3호
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    • pp.31-49
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    • 2010
  • This study intends to look into management and architectural space composition of Honjeon during the reign of Sukjong. Also it purposes to inspect how to affect management of the Royal Palace. The study is based on each Binjeon Honjeon Dogam Eugwe between late 17C and 18C. And the data on management of the Royal Palace is based on Joseonwangjosillok and Seungjeongwon Ilgi. Because Sukjong used ChangDeokgung and GyeongDeokgung alternately, Honjeon located at Munjeongjeon of ChangGyeonggung during Sukjong stayed at ChangDeokgung and located at Gyesangdang of GyeongDeokgung during Sukjong stayed at GyeongDeokgung. At that time, often movement of the King modified procedure of moving Honjeon. Between the first year of Hyenjong and the 9th year of Sukjong, architectural space of Honjeon was settled. In 1659, territory of Jeongjeon was settled. Also between 1674 and 1684, Goklimcheong was built. Construction of Goklimcheong is noticeable character. As Munjeongjeon was being used as Honjeon continually, it was recognized as Honjeon. Due to its long utilization as Honjeon, several gonvernment offices were transferred. Also it influenced utilization of Myeongjeongjeon.

경부고속철도 토공부에 대한 변형상태 계측 및 분석 (Measurements and Analysis of Deformation States in Roadbed in Gyeongbu High Speed Railway)

  • 진남희;김남혁;심현우
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2009년도 춘계학술대회 논문집
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    • pp.1542-1549
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    • 2009
  • The function of subgrade in the railway is to support track load on the subgrade as well as train load. Unlike the traditional railway, the uppermost subgrade layer in the Gyeongbu high speed railway was constructed as the reinforced road bed. The reinforced road bed comprises sub-ballast in the upper part and grade ballast in the lower part. The filling material such as soil and rocks in the subgrade can be settled by consolidation of original ground, compression due to self weight, plastic displacement due to train operation, and unequal settlement due to embankment material or improper compaction, therefore many efforts have been given for sufficient compaction and use of proper filling materials in the construction stage. The purpose of this study is to investigate the deformation state of subgrade in the Gyeongbu high speed railway. The investigation on the subgrade settlement was performed by choosing representative sections suspected to be settled based on the previous GPR test results and track maintenance history, measuring the settlement for some time period after installing settlement measuring instruments on and under the reinforced road bed. and analyzing the long-term subgrade settlement data from monitoring system which was installed at the construction stage of the high speed railway.

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브랜드 쌀의 생산기술과 전망 (Prospect and Production Technology of Brand Rice)

  • 손종록
    • 한국식품저장유통학회:학술대회논문집
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    • 한국식품저장유통학회 2003년도 제23차 추계총회 및 국제학술심포지움
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    • pp.51-70
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    • 2003
  • In recent years, Korean rice must compete with the rice of advanced countries under Doha Development Agenda(DDA) and free Trade Agreement(FTA). Therefore we should find more active and positive solution in rice industry according to the inncreasing power of international pressure. Increasing rice production was the most important policy during the past food-deficient days, but recently, with overproduction of rice, various circulation system by the brand(price)-differentiation should be settled in a recent market of Korea. Nowadays, some advanced rice farmers and Rice Processing Complex(RPC) managers developed new brands of rice with high-quality, adding healthy materials and environment-friendly farming methods. Therefore, the future strategy of making a new brand rice should be planned including selection of rice variety, cultural and post-harvest techniques, circulation and processing methods to compete against foreign rice. And environment-friendly farming is also recommendable for food safety and differentiate from imported rice. For the purpose of successful brand-rice, the following points might be considered. Firstly, selection of good quality rice and continual development of good variety must be conducted for the differentiation of Korean rice from foreign rice. Secondly, a special contract between producer and consumer with functional-rice, organic filming-rice, specific-rice will be recommendable. Thirdly, improvement of post-harvest management and milling system are necessary for the production of differentiated-rice. Fortunately, standard of inspection, rules of description for brand-rice must be developed by a more scientific examination in order to settlement of trust for consumer. Finally, provincial or regional-representative brand rice must be settled and conducted for the development of agreement market system between producer and consumer.

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무역계약에서 이용하는 클레임과 중재조항에 관한 사례연구 (Case Studies on Claim and Arbitration Clauses Using in Trade Contracts)

  • 김상호
    • 한국중재학회지:중재연구
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    • 제12권2호
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    • pp.115-151
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    • 2003
  • As international trade and commerce increases among the nations in the world, it is inevitable fact that disputes rise as well. As these transactions grow more complex, it becomes increasingly important to resolve disputes and conflicts as quickly, efficiently and formatively as possible. In practical commercial affairs, we call a variety of international commercial troubles ‘trade claims’, Trade claims consist of disputes, controversies, or differences which may arise between the parties, out of, or in relation to, or in connection with their contracts, or for the breach thereof. Trade claim should be instituted promptly, otherwise it may be barred by prescription. Also, the other party will not accept the claim by reason of loss of evidence. In this connection, it should be noted that how long the claim prescription would continue. Trade claim should be settled reasonably and amicably between the parties concerned. And if both parties do not reach an agreement through their negotiation, then the claim shall be settled finally by binding arbitration. For the purpose of managing trade claim and arbitration, the trading parties insert in their contracts claim and arbitration clauses. This paper will examine some judicial precedents concerning claim clauses which are closely connected with a time limit of the claim It will also review some famous precedents rendered by the competent courts in connection with the wording, scope and implied renewal of arbitration clauses.

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중재합의의 효력범위에 관한 고찰 - 대법원 2011.12.22. 선고 2010다76573 판결을 중심으로 - (A Study on the Scope of Effect in Arbitration Agreements)

  • 김용길
    • 한국중재학회지:중재연구
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    • 제23권2호
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    • pp.1-35
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    • 2013
  • In the 21th century, its important role in international commercial disputes has established arbitration as the preferred form of dispute resolution. Because commercial disputes have become more complicated and varied with their quantitative increase, it is important that they be settled in a reasonable and rapid manner. Alternative Dispute Resolution (ADR) is now regarded as one of the most effective dispute resolution methods for the settling of commercial disputes and merits notice. Arbitration is a form of dispute resolution in which two parties agree to have their dispute resolved by one or more arbitrators and thereby avoid what could be costly and time-consuming court battles. Often contracts mandate that disputes be settled through arbitration. These arbitration clauses also frequently prohibit plaintiffs from banding together to bring an action on behalf of a larger class. An arbitration agreement is an agreement by parties to summit to arbitration all or certain disputes which have arisen or which may arise between them with respect to their defined legal relationship, whether contractual or not. According to the Supreme Court, general elective arbitration clauses may be considered valid in light of all the relevant facts. Arbitration has been the subject of a great deal of research and the scope of effect in arbitration agreements is a promising avenue for future research.

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메탄-프로판 하이드레이트의 성장 특성에 관한 연구 (Growth Charateristics of Methane-Propane Clathrate Hydrate)

  • 이주동;이만식;김영석;송명호
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2006년도 춘계학술대회
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    • pp.391-394
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    • 2006
  • Growth characteristics of methane-propane clathrate hydrate, growing under different undercooling conditions, was investigated. After the water within pressurized vessel was fully saturated with guest gas molecules by agitation, medium was rapidly undercooled and maintained at the constant temperature. The growth of hydrate was always Initiated with film formations at the upper bounding surface of liquid pool. The visual observation using microscope revealed detailed features of subsequent crystal nucleation, migration, growth and interference occurring within liquid pool. A number of small crystals ascended and settled at the hydrate film. When undercooling was small $({\Delta}T=3.2K)$, some of the settled crystals slowly grew into faceted columns. As the undercooling increased, the downward growth of crystals underneath the hydrate film became dendritic and occurred with greater rate and with finer arm spacing. The shapes of the floating crystals were diverse and included octahedron and triangular or hexagonal platelet When the undercooling was small, the octahedral crystals were found dominant. As the undercooling increased, the shape of the floating crystals also became dendritic. The detailed characteristics of floating crystals were reported in this study.

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