• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.281-281
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• 2017

Recently, global warming by greenhouse gas effect is getting danger and danger for human life and agriculture at present. In Indonesia, according to heavy rain in the agriculture land is often covered by excess water in result crop growth would be affected negative. This water stress triggers roots failure in anaerobic condition for upland crop because of limiting roots respiration. Chili pepper grows in upland sometimes in touch with waterlogging due to rainfall and /or over flow water from river in Indonesia. In this case, roots growing is inhibited by effect of shortage of oxygen at root cap. Therefore, the objective of this study is to observe the plant behavior in waterlogging using mahor local genotypes (Ferosa, Laris, Romario) in Sumatra. The experiment was kept by at 1cm depth water above the soil surface as a waterlogged treatment for ---days. As a result, waterlogging affected plant growth of chili negatively, especially for roots growth. Almost roots were getting bad and changed color for brown during waterlogging. A significant negative effect for nutrient absorption by roots was found in dry weight of all varieties during waterlogging. Dry weight of roots was decreased by 81.4% and 67.6%, and those of aerial part decreased by 74% and 67.2% compared with control in Ferosa and Romario at 1week after treatment. On the other hand, dry weight of roots was decreased only 35% in Laris. Therefore, Laris has a tolerance for waterlogging compared to with other varieties. Also, Laris in SPAD value was kept initial level during waterlogging however those of Ferosa and Romario decreased. Finally, due to impact of waterlogging, it may be the roots become failure because of less aerenchyma formation under anaerobic condition. We need confirm aerenchyma formation morphologically in the future.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.20 no.6
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• pp.699-708
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• 2007

Reinforced concrete deep beams are general structural members used as transfer-girder, pile cap, foundation wall and so on. They have a complex stess formation. Generally, failure mechanisms differ from either continuous deep beams or simple supported deep beams. In continuous deep beams, a negative moment is occurred over intermediate support and the location of maximum moment coincide with high shear force. Therefore, failure usually occurs at this region. While on the other hand, in simple supported deep beam, the region of high shear coincides with the region of low moment. The web opening of deep beams for accepting a facility makes shear behaviors of deep beams more complex and gives rise to an expansion of crack around the opening and a decline of shear capacity of deep beams. Therefore, Engineers must determine a delicate reinforcement method to control a crack and increase a shear capacity. The purpose of this report is a computation of an effective reinforcement method through non-linear finite element method by means of adopting various reinforcement method as variables and a computation of shear capacity formula taking an effectiveness of reinforcement into consideration.

• Journal of the Earthquake Engineering Society of Korea
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• v.28 no.1
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• pp.47-57
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• 2024

Recently, in newly constructed apartment buildings, the exterior wall structures have been characterized by thinness, having various openings, and a significantly low reinforcement ratio. In this study, a nonlinear finite element analysis was performed to investigate the crack damage characteristics of the exterior wall structure. The limited analysis models for a 10-story exterior wall were constructed based on the prototype apartment building, and nonlinear static analysis (push-over analysis) was performed. Based on the finite element (FE) analysis model, the parametric study was conducted to investigate the effects of various design parameters on the strength and crack width of the exterior walls. As the parameters, the vertical reinforcement ratio and horizontal reinforcement ratio of the wall, as well as the uniformly distributed longitudinal reinforcement ratio and shear reinforcement ratio of the connection beam, were addressed. The analysis results showed that the strength and deformation capacity of the prototype exterior walls were limited by the failure of the connection beam prior to the flexural yielding of the walls. Thus, the increase of wall reinforcement limitedly affected the failure modes, peak strengths, and crack damages. On the other hand, when the reinforcement ratio of the connection beams was increased, the peak strength was increased due to the increase in the load-carrying capacity of the connection beams. Further, the crack damage index decreased as the reinforcement ratio of the connection beam increased. In particular, it was more effective to increase the uniformly distributed longitudinal reinforcement ratio in the connection beams to decrease the crack damage of the coupling beams, regardless of the type of the prototype exterior walls.

• International Commerce and Information Review
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• v.13 no.3
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• pp.459-485
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• 2011

This paper examines the seller's obligation to deliver documents conforming to the terms of the sales contract as set forth in articles 30 and 34 of the CISG. Article 30 obliges the seller to band over documents relating to the goods. This obligation to band over documents is further elaborated in article 34. According to article 34, the documents must be tendered at the time and place, and in the form, required by the contract. If the seller has delivered non-conforming documents before the agreed time, he has the right to remedy the defects if this would not cause the buyer unreasonable inconvenience or expense. However, the buyer can claim any damages suffered despite the seller's remedy. Specific emphasis is placed on the interplay between the CISG and Incoterms. Incoterms contain detailed rules governing the obligations of the seller to provide for documents. Incoterms constitute international trade usage under articles 9(1) and 9(2) CISG and supplement construction of CISG with UCP under L/C transaction. In the event of failure by seller to deliver the necessary documents, the buyer has certain remedies available, such as the right to claim damages, the right to demand specific performance, and the right to repair. Furthermore, the failure to deliver the required documents under contract constitute a fundamental breach of the underlying sales contract as defined by article 25 of the CISG by the seller, and thereby enable the buyer to avoid the contract entirely article 49. However, it is stressed that since one of the main principles of the CISG is the preservation of the contract, the avoidance of the contract should remain a remedy of last resort.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.51
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• pp.187-210
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• 2011

International transactions have the threat of non-payment by the buyer or non-performance by the seller. Parties tend to search for additional means of securing performance and payment beyond the mere agreement in the contract. Such security may be achieved by means of a letter of credit. When contracting parties have agreed to pay by means of a letter of credit, the buyer's bank takes upon itself the obligation to pay the purchase price when the seller tenders the documents that are stipulated in the letter of credit. The documents must comply strictly with the terms of the credit.. The documents play a crucial role in letter of credit transaction. The principles of abstraction, separability and strict compliance governing the letter of credit transaction are considered. The concept of fundamental breach of Article 25 CISG was discussed. This article examines whether a failure to deliver documents conforming to the terms of the letter of credit can constitute a fundamental breach of the sales contract as defined by Article 25 of the CISG by the seller and thereby enable the buyer to avoid the contract. For letter of credit transactions it should be accepted that the delivery of non-performing documents constitutes a fundamental breach, if the result of this breach is that the bank refuses to pay the price for the goods. On the other hand, in the interpretation of Article 25 CISG, it should be noted that if the parties have agreed to payment by means of a letter of credit, they have simultaneously agreed to apply the strict compliance principle to the delivery of documents in the sales contract. Finally the parties should ensure that inconsistency between the requirements under the documentary credit and the requirements under the contract of sale is avoided, since the buyer may be in breach of his payment obligation if the seller cannot get paid under the documentary credit when his documents conform with the contract of sale.

• The Transactions of the Korea Information Processing Society
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• v.6 no.11
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• pp.2845-2862
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• 1999

As the technical advances in portable computers and wireless communication technologies, mobile computing environment has been rapidly expanded. The mobile users on mobile host can access information via wireless communication from the distributed heterogeneous multidatabase system in which pre-existing independent local information systems are integrated into one logical system to support mobile applications. Hence, mobile transaction model should include not only the features for heterogeneous multidatabase systems but also the ones for mobile computing environment. In this paper, we proposed a mobile flex transaction model which extends the flexible transaction model that previously proposed for heterogeneous multidatabase systems is extended to support the requirements of mobile heterogeneous multidatabase systems. We also presented the execution control mechanism of the mobile flex transaction model. The proposed mobile flex transaction model allows the definition of location-dependent subtransactions, the effective support of hand-over, and the flexibility of transaction executions. Hence, the proposed mobile flex transaction model can be suit to mobile heterogeneous multidatabase systems that have low power capability, low bandwidth, and high communication failure possibility.

• Transactions on Electrical and Electronic Materials
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• v.13 no.2
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• pp.73-77
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• 2012

Operation of liquid crystal displays (LCDs) can be improved by monolithic integration of the pixel transistors with light emitting diodes (LEDs) on a single substrate. Conventional LCDs make use of filters to control the backlighting which reduces the overall efficiency. These LCDs also utilize LEDs in series which impose failure and they require high voltage for operation with a power factor correction. The screen of small hand-held devices can operate from moderate brightness. Therefore, III-V nanowires that are grown along with transistors over Silicon substrates can be utilized. Control of nanowire LEDs with nanowire transistors will significantly lower the cost, increase the efficiency, improve the manufacturing yield and simplify the structure of the small displays that are used in portable devices. The steps to grow nanowires on Silicon substrates are described. The vertical n-type and p-type nanowire transistors with surrounding gate structures are characterized. While biased at 0.5 V, nanowire transistors with minimum radius or channel width have an OFF current which is less than 1pA, an ON current more than 1 ${\mu}A$, a total delay less than 10 ps and a transconductance gain of more than 10 ${\mu}A/V$. The low power and fast switching characteristics of the nanowire transistor make them an ideal choice for the realization of future displays of portable devices with long battery lifetime.

• Journal of the Korean Society of Safety
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• v.35 no.3
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• pp.16-23
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• 2020

The use of construction machinery has been increasing every year due to the large scale, high-rise and lack of workers in construction work. On the other hand, deaths are on the rise every year due to inadequate risk management for construction machinery work. In addition, the number of deaths caused by the lack of signals or insufficient signals during construction machinery work is increasing rapidly, and it is deemed necessary to analyze the actual conditions and take countermeasures. Therefore this study has developed the Strength Risk Index (SRI) based on the Frequency Risk Index (FRI) and the 5W1H by analyzing in-depth deaths caused by construction machinery over the past five years. The risk index (RI) was assessed using the frequency and strength risk index derived to determine whether it is acceptable (acceptable risk < 0.25 ≦ unacceptable risk) and the risk assessment method for reducing risk was proposed by applying 3E (Engineering, Education, Enforcement) measures for each level of risk for unacceptable risk. It also proposed measures to improve the system, such as requirements for signal numbers, mandatory placement standards, and mandatory installation of side and rear monitoring cameras, as measures for accidents caused by failure to deploy signals or insufficient signals, which account for the highest proportion of deaths among construction machinery operators and workers.

• Asia-Pacific Journal of Business
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• v.8 no.2
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• pp.1-14
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• 2017

Initial public offering (IPO) has been well known to be underpriced initially and under-performed in the long run. However, whether an IPO is underpriced or not strongly depends on how to measure the fair value. This paper hand collects data of IPOs newly listed in Korea market when whether IPO is overpriced or not is clearly distinguishable. The overpriced IPO refers to as the one the underwriters buy back after the listing. With the data, the paper examines that IPOs are overpriced and that the characteristics are related to the underpricing at the aftermarket dates and the performance in the long run. The data of clearly overpriced IPOs are little available from other IPO markets like US IPO market. From the data of IPOs listed under the underwriting rule of market stabilization, the results obtainable are the followings. First of all, the average initial return 70% of the underpriced IPO at the aftermarket dates is greater than the one 40% of the overpriced one. The overpriced IPOs are priced highly over the mid prices of the price bands at the pricing dates and then supported by relatively higher subscription rates of individual investors. The probit analyses moreover report that individual investors do not distinguish the overpricing of IPOs from the underpricing. These imply that the overpricing is strongly affected by the underwriting rule on the initial pricing.

• Geomechanics and Engineering
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• v.1 no.3
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• pp.205-218
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• 2009

The bearing capacity factor $N_{\gamma}$ is computed for a rough conical footing placed over horizontal ground surface. The axisymmetric lower bound limit analysis formulation, in combination with finite elements and linear programming, proposed recently by the authors is used in this study. The variation of $N_{\gamma}$ with cone apex angle (${\beta}$), in a range of $30^{\circ}-180^{\circ}$, is obtained for different values of ${\phi}$; where ${\phi}$ is soil friction angle. For ${\phi}&lt;30^{\circ}$, the magnitude of $N_{\gamma}$ is found to decrease continuously with an increase in ${\beta}$ from $30^{\circ}$ to $180^{\circ}$. On the other hand, for ${\phi}&gt;30^{\circ}$, the minimum magnitude of $N_{\gamma}$ is found to occur generally between ${\beta}=120^{\circ}$ and ${\beta}=150^{\circ}$. In all the cases, it is noticed that the magnitude of $N_{\gamma}$ becomes maximum for ${\beta}=30^{\circ}$. For a given diameter of the cone, the area of the plastic zone reduces generally with an increase in ${\beta}$. The obtained values of $N_{\gamma}$ are found to compare quite well with those available in literature.