• Journal of The Korean Association For Science Education
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• v.44 no.5
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• pp.519-530
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• 2024

The purpose of this study was to examine the effects of a What-If activity applied in Argument-Based Inquiry(ABI) science classes on the argumentation levels of science high school students. For this purpose, the experimental group participated in ABI science classes incorporating What-If activities, while the comparative group participated in ABI science classes without the What-If activities. Transcripts of class discussions were collected for analysis of argumentation level and examples of rebuttals were presented to show the change in the level of argumentation. The results of the study showed that the experimental group, which engaged in What-If activities, showed a higher frequency of high-level rebuttals by both the object and method of rebuttals compared to the comparative group. Furthermore, while both groups showed discussions and rebuttals related to the experimental process, the experimental group also demonstrated additional discussions and rebuttals concerning experimental results and scientific principles, unlike the comparative group.

• Research in Mathematical Education
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• v.2 no.1
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• pp.13-19
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• 1998

The What-If-Not strategy as proposed by Brown & Walter (1969) is one of the most effective strategies for problem posing. However, it has focused only on the aspect of algorithms for generating problems. The aim of this strategy and how it is used to accomplish the aim of the challenging phase are not clear. We need to clarify the aim of the What-If-Not strategy and to establish the process of the strategy for accomplishing the aim. The purpose of this article is to offer a new What-If-Not strategy by clarifying the aim of the challenging phase.

• Journal of Elementary Mathematics Education in Korea
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• v.17 no.2
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• pp.285-299
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• 2013

Problem posing activity of which a learner reinterprets an original problem via a new problem suggested, is a learning method which encourages an active participation and approves self-directed learning ability of the learner. Especially gifted students need to get used to a creative attitude to modify or reinterpret various mathematical materials found in everyday usual lives creatively in steady manner via such empirical experience beyond the question making level of the textbook. This paper verifies the possibility of lesson on question making strategy utilization for creativity development of gifted class, and analyzes various cases of students' trials to modify the rules of a board game called Rummikub in application of their own mathematics after learning What-If-Not strategy.

• The KIPS Transactions:PartD
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• v.17D no.2
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• pp.87-102
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• 2010

A vast amount of traffic data is produced every day from detection devices but this data includes a considerable amount of errors and missing values. Moreover, this information is periodically deleted before it could be used as important analysis information. Therefore, this paper discusses the implementation of an integrated traffic history database system that continuously stores the traffic data as a multidimensional model and increases the validity and completeness of the data via a flow of processing steps, and provides a what-if analysis function. The implemented system provides various techniques to correct errors and missing data patterns, and a what-if analysis function that enables the analysis of results under various conditions by allowing the flexible definition of various process related environment variables and combinations of the processing flows. Such what-if analysis functions dramatically increase the usability of traffic data but are not provided by other traffic data systems. Experimantal results for cleaning the traffic history data showed that it provides superior performance in terms of validity and completeness.

• School Mathematics
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• v.13 no.1
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• pp.175-187
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• 2011

The purpose of this study is to develop and utilize various kinds of mathematics teaching materials for gifted class in elementary school by utilizing polyominoes and a what-if-not strategy. Blokus is used to let students understand the characteristics of polyominoes, and omok is utilized to let them grasp interior point. Thus, the activities that utilized the new materials, blokus and omok, are developed to teach Pick's theorem. Besides, recreation activities were additionally prepared to provide education in an easy, intriguing and creative manner. The findings of the study is as follows: First, each of the materials was utilized in a different manner when the students engaged in basic and enrichment learning. Second, the mathematically gifted students were able to discover Pick's theorem in the course of utilizing the materials that contained recreational elements. Third, the students were taught to foster their problem-solving skills about area, girth and interior point by making use of the materials that were designed to be linked to each other. Fourth, existing programs were just designed to attain particular objects, to be conducted at a fixed time and to cater to particular graders. Fifth, when the students made problems by making use of the what if (not) strategy and the materials, they responded in diverse ways and were able to apply them.

• Communications of Mathematical Education
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• v.26 no.1
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• pp.51-69
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• 2012

The cognition of an intrinsic attribute play an important role in the process of theoretical generalization. It is the aim of this paper to study how the theoretical generalization is made. First of all, we suggest the What-if-only-strategy(WIOS) which is the strategy helping the cognition of an intrinsic attribute. And we propose the process of the theoretical generalization that go on the cognitive stage, WIOS stage, conjecture stage, justification stage and insight into an intrinsic attribute in order. We propose the process of generalization adding the concrete process cognizing an intrinsic attribute to the existing process of generalization. And we applied the proposed process of generalization to two mathematical theorem which is being managed in middle school. We got a conclusion that the what-if-only strategy is an useful method of generalization for the proposition. We hope that the what-if-only strategy is helpful for both teaching and learning the mathematical generalization.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.51
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• pp.55-78
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• 2011

This paper has derived some problems relating to the use of letters of intent which are common occurrence in the international contracts after considering its nature and legal issues. As reviewed before, some problems may occur when a party has documented a stage in the negotiations by letters of intent. Such documents may well explicitly spell out if, and to what extent, the parties should be bound by what they have already agreed or to carry on negotiations in order to reach the final contract. But if the documents are silent, some problems would arise. Contracting parties are therefore well advised to spell out if, and to what extent, they should be bound by such preliminary agreements. Here again, it might be prudent to explicitly set forth that the parties should not be bound until there is a final written contract signed by authorized representatives of the parties but that they shall abstain from such measures which may defeat their stated objective to reach final agreement, for example, by diminishing the value of performance under the contemplated contract.

• English & American cultural studies
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• v.16 no.2
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• pp.1-27
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• 2016

This paper aims to explore an other way to reflect on the self through woman, through the feminine, as a mode of being. In other words, in order to say about "how to re-think the self, in a different way," if I start from the issue of the feminine, how and why can this "a different way" be linked to woman? This question implies several more questions; what is woman? what is the feminine? what does it mean "a different way"? how can we say of "a different way"? Or, why can we take woman as the medium to "be" in a different way? If woman gives us a "way out," that is to say, if (S)he opens out a way for our out-being, ex-sistence, standing outside ourselves, that is, ek-stasis, does this enable us to overstep egotism? Then, how can we re-flect and say about this "out (as 'ex-/ek-')" in terms of woman, the feminine? This paper starts from these questions. Woman is an explosive overflowing force, movement, and process, which displace 'within' into 'outside,' as what Irigaray would call a "disruptive excess." Thus, I start from saying of the "place" in which woman itself takes place as overflowing. By referring to Derridian, Lacanian, and Heideggerian terms, I hope to foreground the ex-sistential space of woman.

• Korean Journal of Construction Engineering and Management
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• v.5 no.6 s.22
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• pp.129-137
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• 2004

When we consider the present state of construction delay claim analysis, the delay analysis methods generally used from the abroad construction industries are not applied to our industry. By reviewing the existing methods of delay analysis, this study investigated the important concepts and characteristics of the delay analysis methods. Selection of the delay analysis methods could be decided among 1)As-planned versus as-built comparison method,2)What-if method,3)But-for method.4)CPA method, and 5)DAMUDS method. In order to make clear the characteristics and mechanisms of the analysis methods, this study performed a case study.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.8
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• pp.897-904
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• 2012

The rifling design problem has continuous-type shape variables and an integral number of riflings. In addition, it requires considerable time for analysis because its behavior should be described by a nonlinear finite element model (FEM). Therefore, this study presents an efficient design process for rifling based on a design of experiment (DOE) approach. First, Bose's orthogonal array is used to represent 25 runs for four design variables including three shape variables and one integer variable. Then, nonlinear FE analyses are performed. Next, to minimize the bullet resistance without affecting the bullet velocity and bullet rotational angle immediately before a bullet leaves the gun barrel, a what-if design is performed. In the proposed what-if design, a functional including the design objective and constraints is constructed and effect analysis is performed by using the functional. It is found that the new design obtained from the what-if design shows better results than the current one.