• Nuclear Engineering and Technology
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• v.55 no.8
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• pp.2823-2834
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• 2023

Austenitic stainless steel welds (ASSWs) of nuclear components undergo aging-related degradations caused by high temperature and neutron radiation. Since irradiation leads to the change of material characteristics, relevant quantification is important for long-term operation, but limitations exist. Although ion irradiation is utilized to emulate neutron irradiation, its penetration depth is too shallow to measure bulk properties. In this study, a systematic approach was suggested to estimate mechanical properties of ion irradiated 308 ASSW. First of all, weld specimens were irradiated by 2 MeV proton to 1 and 10 dpa. Microstructure evolutions due to irradiation in δ-ferrite and austenite phases were characterized and micropillar compression tests were performed. In succession, dislocation density based stress-strain (S-S) relationships and quantification models of irradiation defects were adopted to define phases in finite element analyses. Resultant microscopic S-S curves were compared to verify material parameters. Finally, macroscopic behaviors were calculated by multiscale simulations using real microstructure based representative volume element (RVE). Validity of the approach was verified for the unirradiated specimens such that the estimated S-S curves and 0.2% offset yield strengths (YSs) which was 363.14 MPa were in 10% agreement with test. For irradiated specimens, the estimated YS were 917.41 MPa in 9% agreement.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.7
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• pp.4151-4155
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• 2013

Background: To compare response evaluation criteria in solid tumours (RECIST) and volumetric evaluation (VE) for colorectal cancer with liver-limited metastasis. Patients and Methods: VE of liver metastases was performed by manual contouring before and after chemotherapy on 45 pairs of computed tomography (CT) images in 36 patients who suffered from metastatic colorectal cancer (mCRC) with liver metastasis only. Cohen kappa was used to compare the agreement between VE and RECIST. Pearson correlation was performed for their comparison after cubic root transformation of the aggregate tumor volumes. Logistic regression was done to identify clinical and radiographic factors to account for the difference which may be predictive in overall response (OR). Results: There were 16 partial response (PR), 23 stable disease (SD) and 6 progressive disease (PD) cases with VE, and 14 PR, 23 SD and 8 PD with RECIST. VE demonstrated good agreement with RECIST (${\chi}$=0.779). Discordant objective responses were noted in 6 pairs of comparisons (13.3%). Pearson correlation also showed excellent correlation between VE and RECIST ($r^2$=0.966, p<0.001). Subgroup analysis showed that VE was in slightly better agreement with RECIST for enlarging lesions than for shrinking lesions ($r^2$=0.935 and $r^2$=0.780 respectively). No factor was found predictive of the difference in OR between VE and RECIST. Conclusions: VE exhibited good agreement with RECIST. It might be more useful than RECIST in evaluation shrinking lesions in cases of numerous and conglomerate liver metastases.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.63
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• pp.111-132
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• 2014

This paper analyzed the obligations of the parties entering into an international leasing agreements, focusing on the Draft Common Frame of Reference (DCFR) Book IV, Part B. The lessor's obligations are as follows. i) The lessor must deliver goods to the lessee by the due date of delivery so that the lessee can use the goods on the starting date of the lease agreement. ii) The lessor must conform with the contract so that the goods meet the purpose of the contract at the start of the lease agreement and throughout the period of the lease agreement. iii) If the lessee returns the goods upon the termination of the lease agreement, the lessor must cooperate with the lessee. The lessee's obligations are as follows. i) The lessee must pay rent, which is the most critical obligation of the lessee. ii) The lessee must cooperate with the lessor so that the lessor can perform the obligation to deliver the goods and accept the goods of which the lessee shall take control. iii) The lessee shall perform fiduciary duties while it uses and makes profits from the goods, and when the lessor cannot take any measure to protect the object, the lessee must prevent damage. Further, if the lessor pays expenses that are not considered necessary expenses, the lessor may not be reimbursed and must accept the goods after delivery to preserve them. iv) The lessee must give notice to the lessor if there is a possibility that a third party can claim rights to goods or infringe upon the lessor's ownership while using the goods. v) At the end of the lease period, the lessee must return the goods to the lessor.

• Journal of The Korean Astronomical Society
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• v.29 no.spc1
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• pp.123-124
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• 1996

Snapshots of eight SA and standard fields from low to high galactic latitudes were made using the KPNO 0.9m 2K $\times$ 2K CCD with a limiting magnitude from 19 to 22.5. The purpose of this study is to determine the vertical distribution of stars with respect to Galactic latitude and z-distance in comparison with the model simulation between intermediate population to the 'thick disk' component of scale height of a few kpc. Comparison of the preliminary results between observed and model simulation for 3 of the S fields shows good agreement both in V-mag and B- V color distributions. A bimodal distribution in B- V at high galactic latitude seems to be represented by a halo and 'thick disk' dwarf in the blue and by a normal disk dwarf population in the red.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.13 no.11
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• pp.895-900
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• 2000

In this paper, C-V characteristics based on the structure of GaAs MESFET’s has been proposed with wide range of applied voltages and temperatures. Small signal capacitance; gate-source and gate-drain capacitances are represented by analytical expressions which are classified into two different regions; linear and saturation regions with bias voltages. The expression contains two variables; the built-in voltage( $V_{vi}$ )and the depletion width(W). Submicron gate length MESFETs has been selected to prove the validity of the theoretical perdiction and shows good agreement with the experimental data over the wide range of applied voltages.

• Journal of the Korean Vacuum Society
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• v.4 no.S2
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• pp.139-147
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• 1995

The mechanism of the ionized cluster beam deposition has been studied using Molecular Dynamics Simulation. The Embedded Atom Method(EAM) potential were used in the simulation. The impact of a Au95-cluster on Au(100) substrate was studied for the impact energies 0.15-10eV/atom. The dependency of the impact energy of cluster beam was observed. For the cluster energy impact of 10eV per atom, the defects on surface were created and the cluster embedded into substrate as an amorphous state. For the energy of 0.5eV per atom, the defect free homoepitaxial growth was observed and atomic scale nucleation was formated, which are in good agreement with experiment. Thus molecular dynamics simulation is very useful to study the mechanism of the ionized cluster beam deposition.

• Nuclear Engineering and Technology
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• v.34 no.4
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• pp.370-381
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• 2002

The neutron induced nuclear data for Pr-141, Nd-143, Nd-145, Sm-147 and Sm-149 were calculated and evaluated from 10 keV to 20 MeV. The energy dependent optical model potential parameters were extracted based on the recent experimental data and applied up to 20 MeV. The s-wave strength function was calculated. Spherical optical model , statistical model in equilibrium energy, multistep direct and multistep compound model in pre-equilibrium energy and direct capture model were introduced in Empire calculation. The theoretically calculated cross sections were compared with the experimental data and the evaluated files. The model calculated total and capture cross sections were in good agreement with the reference experimental data. The capture cross sections in pre-equilibrium were enhanced in recent released Empire version. The evaluated cross section results were compiled to ENDF-6 format and will improve the ENDF/B-Vl.

• Journal of the Korean Physical Society
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• v.73 no.11
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• pp.1612-1618
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• 2018

In this work, the ground-state properties of an interacting electron gas confined in a two-dimensional quantum dot system with the Gaussian potential ${\upsilon}(r)=V_0(1-{\exp}(-r^2/p))$, where $V_0$ and p are confinement parameters, are determined numerically by using the Thomas-Fermi approximation. The shape of the potential is modified by changing the $V_0$ and the p values, and the influence of the confining potential on the system's properties, such as the chemical energy, the density profile, the kinetic energy, the confining energy, etc., is analyzed for both the non-interacting and the interacting cases. The results are compared with those calculated for a harmonic potential, and excellent agreement is obtained in the limit of high p values for both the non-interacting and the interacting cases.

• Journal of Arbitration Studies
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• v.17 no.1
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• pp.183-215
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• 2007

The purpose of this paper is to study of WTO regulations related FTA such as Understanding on the Interpretation of Article XXIV of the General Agreement on Tariffs and Trade(GATT) 1994 and General Agreement on Trade in Service(GATS). In this study, the First introduced FTA rules of WTO in the chapter 2. The WTO agreement includes the "General Agreement on Tariffs an Trade(GATT) 1994". This instrument, known as "GATT 1994", is based on upon the original General Agreement on Tariffs and Trade referred to as "GATT 1947". The Second analyzed the relations between FTA and Article XXIV of GATT 1994 in the chapter 3. The Article XXIV of GATT 1994 is an agreement between the distinctive members for liberalizing trade. The Article XXIV of GATT 1994 is consist of three parts such as customs unions, free-trade area, and interim agreements that WTO is referred to as "Regional Trade Agreement(RTA)". There is a difference between the customs unions and the free-trade area. In the customs unions rules, the members should have the same tarifficatio and the same trade provision against non-members, but in the free-trade are a rules, the member is not necessary to have the same tarifficatio and the same trade provision against non-members. But, the both rules have a liberalization of trade in a common as a revoking tariffs and the government regulations for interfering with trade. In this case, however, the both rules include an inconsistency ele ment under WTO rules such as Most-Favoured-Nation Treatment(MFN) and National Treatment on Internal Taxation and Regulation(NTITR). This study reviewed neither inconsistency nor consistency on the both rules with the RTA of WTO under Article XXIV of GATT 1994. The Third analyzed the relations between FTA and Article V of GATS under WTO in the chapter 4. The GATS is a rule of WTO for the growing importance of trade in services for the growth and development of the world conomy. The GATS is a new rule rather than GATT's rule for concerning goods trade. The Article V of GATS under WTO is a rule that makes based on upon the Article XXIV of GATT. Therefore, If it is to be examined the Article V of GATS, it should be referred to a and an interpretation of the text of the Article XXIV of GATT. However, the Article V of GATS is on the undeveloped stage compare to the Article XXIV of GATT. Because, the statistics of WTO showed that the RTAs under the Article XXIV of GATT have 150 cases completed between nations, but the RTAs under the Article IV of GATS have 10 cases completed between nations. The Forth examined the interpretation of FTA rules under WTO in the chapter 5. Concerning the consistency issue of customs unions and free-trade area under the Article XXIV of GATT, the working parties in customs unions and in free-trade area have been reviewed the consistency is sue which had been not if to GATT. However, the parties finished to get up with one accord the both that are a consistency of argument and an inconsistency of argument with the interpretation of the Article XXIV of GATT. The interpretation of the Article XXIV of GATT has been raised as the issues when EEC by Rome Treaty established in 1957. However, the consistency is sue only agreed 6 working parties out of 69 working parties finished the reviewing of the interpretation up to the end of 1994. Also the consistency issue concerned with the special privilege measure of the customs unions and tree-trade area under the Article XXIV of GATT discussed only 3 cases between working parties up to now and did not accepted as an issue for working parties' report. In conclusion in the chapter 6, this study raised the issues of WTO that are a conference of a new round under WTO and the issues of clarity between FTA rule and WTO regulation.

• International Journal of Naval Architecture and Ocean Engineering
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• v.5 no.2
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• pp.302-312
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• 2013

While displacement type Deep-V mono hulls have superior seakeeping behaviour at speed, catamarans typically have modest behaviour in rough seas. It is therefore a logical progression to combine the superior seakeeping performance of a displacement type Deep-V mono-hull with the high-speed benefits of a catamaran to take the advantages of both hull forms. The displacement Deep-V catamaran concept was developed in Newcastle University and Newcastle University's own multi-purpose research vessel, which was launched in 2011, pushed the design envelope still further with the successful adoption of a novel anti-slamming bulbous bow and tunnel stern for improved efficiency. This paper presents the hullform development of this unique vessel to understand the contribution of the novel bow and stern features on the performance of the Deep-V catamaran. The study is also a further validation of the hull resistance by using advanced numerical analysis methods in conjunction with the model test. An assessment of the numerical predictions of the hull resistance is also made against physical model test results and shows a good agreement between them.