• Journal of Educational Research in Mathematics
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• v.9 no.2
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• pp.383-404
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• 1999

This study began with an epistemological question about the nature of mathematical cognition in relation to the learner's activity. Therefore, by examining Piaget's 'reflective abstraction' theory which can be an answer to the question, we tried to get suggestions which can be given to the mathematical education in practice. 'Reflective abstraction' is formed through the coordination of the epistmmic subject's action while 'empirical abstraction' is formed by the characters of observable concrete object. The reason Piaget distinguished these two kinds of abstraction is that the foundation for the peculiar objectivity and inevitability can be taken from the coordination of the action which is shared by all the epistemic subjects. Moreover, because the mechanism of reflective abstraction, unlike empirical abstraction, does not construct a new operation by simply changing the result of the previous construction, but is forming re-construction which includes the structure previously constructed as a special case, the system which is developed by this mechanism is able to have reasonability constantly. The mechanism of the re-construction of the intellectual system through the reflective abstraction can be explained as continuous spiral alternance between the two complementary processes, 'reflechissement' and 'reflexion'; reflechissement is that the action moves to the higher level through the process of 'int riorisation' and 'thematisation'; reflexion is a process of 'equilibration'between the assimilation and the accomodation of the unbalance caused by the movement of the level. The operational learning principle of the theorists like Aebli who intended to embody Piaget's operational constructivism, attempts to explain the construction of the operation through 'internalization' of the action, but does not sufficiently emphasize the integration of the structure through the 'coordination' of the action and the ensuing discontinuous evolvement of learning level. Thus, based on the examination on the essential characteristic of the reflective abstraction and the mechanism, this study presents the principles of teaching and learning as following; $\circled1$ the principle of the operational interpretation of knowledge, $\circled2$ the principle of the structural interpretation of the operation, $\circled3$ the principle of int riorisation, $\circled4$ the principle of th matisation, $\circled5$ the principle of coordination, reflexion, and integration, $\circled6$ the principle of the discontinuous evolvement of learning level.

• The Mathematical Education
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• v.49 no.3
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• pp.299-311
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• 2010

The purpose of this study was to examine the effects of abstraction offer of basic concept principle and feedback of self-efficacy attributional and mathematical study ability of math underachievers in high school based on the attribution theory and self-efficacy theory. The hypothesis were posed as below : Hypothesis 1: The experimental group that takes the abstraction offer of concept principle and attributional feedback training would be better at most self-efficacy than the control group that doesn't. Hypothesis 2: The experimental group that takes the abstraction offer of concept principle and attributional feedback training would have better math achievement than the control group that doesn't. They were divided into an experimental group and a control group, and the attribution disposition, self-efficacy and academic achievement of the children were measured by pretest and posttest. For data analysis, SPSS/PC+ program was employed and t-test was conducted. The main findings of this study were as below : First, the abstraction offer of concept principle and attributional feedback training was effective for enhancing the math self-efficacy in high school underachievers. Second, the abstraction offer of concept principle and attributional feedback training was effective for increasing the math achievement in high school underachievers.

• Journal of the Korean Society of Costume
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• v.38
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• pp.337-358
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• 1998

Underlying principles on the origin and establishment of the concept fo Right-and-Left (R-&-L) in Korean traditional costume is studied in this paper. Among Korean traditional costumes, ordinary and funeral costumes are considered in this study. Thed concept of R-&-L expanded into different elements of daily life among Korean people is also considered as a process of conceptual development : starting from astron-omy principle, then developed to pragmatism principle, and expanded to abstraction principle. No evidence on the case where the astro-omy principle was directly applied to was found in this study. In most cases, pragmatism and abstraction principles are observed as underly-ing principles. In ordinary costumes, pragmatism principle is the fundamental base for R-&-L through right-hand-use rule. Even though abstraction prin-ciple was found in some ordinary costumes, we believe that this was generated for adding more meanings in addition to the pragmatism principle. In funeral costumes, pragmatism principle was almost totally ignored unlike in ordinary costumes because the funeral rite was performed though formality with abstract thoughts. The abstraction principle was exercised with the form of simple-discrimination rule based on the dual system along with Yin-Yang related cultural rules such as‘Yang-left-and-Yin-right’or‘father-left-and-mother-right’. However, the case where‘left-male-and-right-female’rule is applied to was not found in this study.

• Journal of Information Technology Services
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• v.8 no.3
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• pp.145-157
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• 2009

As the software development cycles is getting shorter, the software reusability is emphasized accordingly. Specifically, the design reusability is being recognized as one of the most important factor to increase the software quality and productivity and make the maintenance cost down. Two essential abilities are needed to improve the design reusability. One is the identification of the reusable objects, and the other is the organization of the relationships among the objects. However, the existing methods using such as a grammatical analysis, a scenario matching and a unit of design problems(design pattern) have not been proposed proper principles to identify the reusable objects on the basis of the abstraction which is the core of the object-oriented concept. In this paper, we will offer the Two-Pass abstraction principle based in the abstraction concept.

• Journal of the Korea Society for Simulation
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• v.19 no.4
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• pp.281-289
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• 2010

Recently the intelligent agent systems have been emerged as one of key issues for developing the defense M&S systems. However, most conventional agent architecture of M&S systems utilize the script-based models and can only deal with the individual behaviors so that they cannot suitably describe the precise tactical/strategic behavior and/or complex warfare environment. To overcome these problems, we have proposed the HEAP(Hierarchical Encapsulation and Abstraction Principle)-based hierarchical multi-agent system architecture that is able to intelligently cope with the complex missions based on the functional role of each agent on the hierarchy such as an intelligence officer, captain, commander.

• Journal for History of Mathematics
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• v.26 no.5_6
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• pp.389-400
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• 2013

The article makes a discussion to conceptualize a histo-genetic principle in the real historical view point. The classical histo-genetic principle appeared in 19th century was founded by the recapitulation law suggested by biologist Haeckel, but recently it was shown that the theory on it is no longer true. To establish the alternative rationale, several metaphoric characterizations from the history of mathematics are suggested: among them, problem solving, transition of conceptual knowledge to procedural knowledge, generalization, abstraction, circulation from phenomenon to substance, encapsulation to algebraic representation, change of epistemological view, formation of algorithm, conjecture-proof-refutation, swing between theory and application, and so on.

• 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.

• Journal of Arbitration Studies
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• v.8 no.1
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• pp.323-352
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• 1998

Documentary letters of credit including standby letters of credit are governed by the independence or abstraction rule and the doctrine of strict compliance. Since the former rule requires the issuing bank to honor the drafts regardless of the defective performance of the underlying contract, the applicant(the customer) will be without a remedy if he is unable to make himself whole by litigation on the underlying contract. Therefore, the applicant is exposed to a risk much higher than in the commercial letters of credit. The Uniform Customs and Practice for Documentary Credit(UCP) has no provisions allowing legal relief for the applicant on the abuse of L/C by unscrupulous beneficiary, but UCC ${\S}5-114$ has provision allowing injunctive relief for the applicant. In this paper, I attempted to clarify certain standards of injunctive relief available for the customer in the credit. When there is fraud in the L/C transaction by any of the parties concerned, we must weigh the principle of independence or abstraction and the fraud rules. According to banking practice and judicial precedence, we need not keep the principle of independence and abstaction even in fraudulent transaction and the bona fide sufferer must be protected. The purpose of this paper is to review the studies of Fraud rule and the Injunction and to suggest the applicable standards for the Injunction therory under letters of credit. Specially this paper analysed the following ; (1) the guideline for the fraud (exception) rule to the autonomy principle, (2) the appilcable standards of the Injunction, and (3) the implications on parties concerned in letters of credit transaction. Conclusively, the Injunction should be granted if (1) there is clear proof of fraud (2) the fraud constitutes fraudulent abuse if the independent purpose of L/C (3) irreparble injury might follow if injunction is not granted or the recovery of damages would be seriously endangered.

• The Journal of the Korea Contents Association
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• v.11 no.9
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• pp.63-75
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• 2011

A number of process algebras have been proposed to develop distributed mobile real-time systems: pi-Calculus, Mobile Ambients Calculus, Bigraph, etc. However, as the systems get large and complex, the algebras become less suitable for understanding the interactions and mobility of the processes of the systems due to the size and complexity. Therefore it is necessary to handle the size and complexity for systematic understanding of the systems. This paper handles the size and complexity with a method of abstraction on sequences of interactions and movements of processes in the systems, which can be further organized in the form of hierarchically structured lattices, namely, Prism. The theoretical principle of the abstraction is based on a new concept of Behavior Ontology, which is extended from Active ontology. Prism allows the systems to be analyzed in the perspective of the lattices in Prism, which are characterized by the hierarchically organized behavioral properties of the developing systems, for systematic understanding the systems. In this way, the complexity of the interactions and the movements can be handled systematically in the semantically and hierarchically organized structure of the behavior.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.49
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• pp.139-164
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• 2011

Traditionally courts have been adopted over the years two standards of dealing with compliance of documents such as strict compliance and substantial compliance and the substantial compliance, which was somewhat less demanding than the strict compliance. However the new guidelines of ICC's international standard banking practice for the examination of documents under documentary credits set up how the UCP is to be applied in practice. The payment obligations of an issuing bank to a beneficiary are independence of the performance or the nonperformance of any contract underlying the letter of credit. However, strictly applying the principle of independence and abstraction could produce unfair results by operating unjustly enrich an unscrupulous beneficiary in case of fraud. Accordingly, when a beneficiary presents complying documents, the issuing bank is bound to honour the presentation unless the fraud rule applies on the facts of the case such as forged or material fraud. If it does, the issuing bank(issuer) needs not pay despite the complying presentation of documents by the beneficiary under the Uniform Commercial Code Article 5-109 and case law in America. However the fraud rule was not addressed in UCP 600. In conclusion, view in terms of legal principle and the court cases is variable and difficult to honour or dishonour the presentation in case of application of the independence principle and fraud rule such as the problems on burden of proof timely, possibility of granting injunction in order to protect against victim for bona fide applicant.