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Analysis of Abstraction Contents in Informatics Textbooks of Middle School According to 2015 Revised Curriculum (2015 개정교육과정에 따른 중학교 정보 교과서에 나타난 추상화 내용 분석)

  • Kim, Soohwan
    • The Journal of Korean Association of Computer Education
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    • v.21 no.5
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    • pp.1-10
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    • 2018
  • The revised informatics is to be compulsory for middle school students from 2018 according to 2015 revised curriculum. The concept of abstraction in informatics curriculum has common features and differences compared with general abstraction, however there is a mix of concepts in the current informatics textbook. The abstraction of computational thinking needs to connect with automation, so it is difficult to teach correct concept of abstraction with these textbooks. Therefore, this research conducted to investigate several informatics textbooks that were developed by the revised curriculum and to analyze the concept and examples of abstraction. As a result, some textbooks have that there is a mix of concepts about general abstraction and no connection with automation. This research suggests clarified abstraction and educational examples for cultivating computational thinking to improve this situation. This result will be basic recourse for the reconstruction of abstraction lesson to improving computational thinking.

A Study on Frida Kahlo's Fashion Style in Contemporary Fashion (현대 패션에 나타난 프리다 칼로 패션 스타일에 관한 연구)

  • Oh, Eun-Kyung;Kwak, Tai-Gi
    • Journal of the Korean Society of Costume
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    • v.61 no.6
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    • pp.113-130
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    • 2011
  • Post-Modern Multiculturalism is spreading in many ways and other cultural interest has led to the Latin American culture, which has steadily appeared as the main fashion concept of the international collection. Frida Kahlo(1907-1954), a representative of Latin American culture and a Mexican female surrealistic painter, who gives us some inspiration for contemporary fashion design. The purpose of this study is to have a correct understanding of and research on Latin American culture and to expand the expression of fashion design. In the process, this article examines the costume of Mexico belong to the Indio culture which had been regarded as the Other for a long time and understands Frida Kahlo's fashion style: Tehuanas costume and her masculine style. The Tehuanas costume is a traditional style of the city, Tehuantepec, located in the southeast of Mexico, which is characterized by colorful floral patterns and a long skirt. Three fashion concepts were derived from her fashion style: tradition & modern, love & farewell, and masculine & feminine. The scope of this study investigates the Haute Couture and the Pret-a-porter women's wear collections and photos from 1998 to 2010 in Europe, USA and South America. From classifying the collected photos into each concept, three styles such as ethnic, romantic and androgynous style were derived. These fashion styles were analyzed through the formative elements of dress, color, silhouette, pattern, material and clothing construction in order to figure out how costumes of other cultures influenced on contemporary fashion. As a design inspiration, Frida Kahlo extends her influence into innerwear, accessories and hairstyles, as well as women's wear. These inspirations emerge steadily from the past and far into the future as an expression of a fashion design concept.

New bimaxillary orthognathic surgery planning and model surgery based on the concept of six degrees of freedom

  • Jeon, Jaeho;Kim, Yongdeok;Kim, Jongryoul;Kang, Heejea;Ji, Hyunjin;Son, Woosung
    • The korean journal of orthodontics
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    • v.43 no.1
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    • pp.42-52
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    • 2013
  • The aim of this paper was to propose a new method of bimaxillary orthognathic surgery planning and model surgery based on the concept of 6 degrees of freedom (DOF). A 22-year-old man with Class III malocclusion was referred to our clinic with complaints of facial deformity and chewing difficulty. To correct a prognathic mandible, facial asymmetry, flat occlusal plane angle, labioversion of the maxillary central incisors, and concavity of the facial profile, bimaxillary orthognathic surgery was planned. After preoperative orthodontic treatment, surgical planning based on the concept of 6 DOF was performed on a surgical treatment objective drawing, and a Jeon's model surgery chart (JMSC) was prepared. Model surgery was performed with Jeon's orthognathic surgery simulator (JOSS) using the JMSC, and an interim wafer was fabricated. Le Fort I osteotomy, bilateral sagittal split ramus osteotomy, and malar augmentation were performed. The patient received lateral cephalometric and posteroanterior cephalometric analysis in postretention for 1 year. The follow-up results were determined to be satisfactory, and skeletal relapse did not occur after 1.5 years of surgery. When maxillary and mandibular models are considered as rigid bodies, and their state of motion is described in a quantitative manner based on 6 DOF, sharing of exact information on locational movement in 3-dimensional space is possible. The use of JMSC and JOSS will actualize accurate communication and performance of model surgery among clinicians based on objective measurements.

Approximate Technique for Ship′s Manoeuvrabilily Prediction (선박조종성능 추정을 위한 근사적 기법에 관한 연구)

  • Ho-Young Lee;Sang-Sung Shin
    • Journal of the Society of Naval Architects of Korea
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    • v.35 no.4
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    • pp.19-26
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    • 1998
  • In this paper, we studied the Similar Ship(SS) concept[1,2] as a method to an experimental and semi-emperical approach for the estimation of hull hydrodynamic forces and hull-propeller-rudder interaction coefficients and used these methods to predict ship's manoeuvrability. The SS concept is adopted to use experimental data of prototype ships for manoeuvrability prediction of a new ship. The SS concept is composed of the key components as follows: existence of experimental data about prototype ship, availability of semi-emperical method for estimating the changes of hull force, a method to correct the prototype ship data. On the basis of these concepts, we attempted to simulate manoeuvrability at ballast and scantling draft conditions by making use of experimental data at full load draft condition and to simulate manoeuvrability of new ships by making use of experimental data for prototype. From present calculation, it was found that the present method can predict the ship's manoeuvrability accurately at early design stage.

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Implications in UNESCO's Concept of 'Cultural Diversity' and Its Application to the 「World Geography」 Subject (유네스코 '문화 다양성' 개념의 함축과 「세계지리」 과목에서의 실천 방안)

  • Jeon, Jong-Han
    • Journal of the Korean Geographical Society
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    • v.51 no.4
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    • pp.559-576
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    • 2016
  • The concept of 'cultural diversity' has emerged as a key concept and the buzzword of the 21st century's international community in education, science and culture sectors since UNESCO's "World Declaration on Cultural Diversity"(2001). However, the appropriate and correct implementation in educational level and in a subject scale can not be pursued without special understanding of multilateral implications of UNESCO's 'cultural diversity' because the concept of cultural diversity has been distributed to various applications according to individual scholars and institutions before the "World Declaration on Cultural Diversity" was released. The ultimate orientation of 'cultural diversity', the concept presented in "World Declaration on Cultural Diversity" is 'world peace' and 'the coexistence of various cultures of mankind'. In this regard, 'cultural diversity' has special 'educational' meaning to the next generation as well as the current one. Also, it is meaningful to take educational practices on cultural diversity in case of the "World Geography" subject in view of that international society of geographical education came up with "International Declaration of Geographical Education for Cultural Diversity" in the IGU(International Geographical Union) 2000. From this point of view, the author proposes that the 'cultural diversity' concept implies four folds of meanings as an ideology, as a symbol, as a vision, and as a epistemological turn based on the analysis of literatures on 'cultural diversity' of UNESCO, then presents an educational practice centering around the examples and its usage of teaching materials of cultural diversity.

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The Locus of the Word Frequency Effect in Speech Production: Evidence from the Picture-word Interference Task (말소리 산출에서 단어빈도효과의 위치 : 그림-단어간섭과제에서 나온 증거)

  • Koo, Min-Mo;Nam, Ki-Chun
    • MALSORI
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    • no.62
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    • pp.51-68
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    • 2007
  • Two experiments were conducted to determine the exact locus of the frequency effect in speech production. Experiment 1 addressed the question as to whether the word frequency effect arise from the stage of lemma selection. A picture-word interference task was performed to test the significance of interactions between the effects of target frequency, distractor frequency and semantic relatedness. There was a significant interaction between the distractor frequency and the semantic relatedness and between the target and the distractor frequency. Experiment 2 examined whether the word frequency effect is attributed to the lexeme level which represent phonological information of words. A methodological logic applied to Experiment 2 was the same as that of Experiment 1. There was no significant interaction between the distractor frequency and the phonological relatedness. These results demonstrate that word frequency has influence on the processes involved in selecting a correct lemma corresponding to an activated lexical concept in speech production.

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DERIVATIONS OF MV-ALGEBRAS FROM HYPER MV-ALGEBRAS

  • Hamidi, M.;Borzooei, R.A.
    • Honam Mathematical Journal
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    • v.38 no.3
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    • pp.643-659
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    • 2016
  • In this paper, we investigate some new results in MV-algebras and (strong) hyper MV-algebras. We show that for any infinite countable set M, we can construct an MV-algebra and a strong hyper MV-algebra on M. Specially, for any infinite totally bounded set, we can construct a strong hyper MV-algebra on it. Then by considering the concept of fundamental relation on hyper MV-algebras, we define the notion of fundamental MV-algebra and prove that any MV-algebra is a fundamental MV-algebra. In practical, we show that any infinite countable MV-algebra is a fundamental MV-algebra of itself, but it is not correct for finite MV-algebras.

PSEUDO n-JORDAN HOMOMORPHISMS AND PSEUDO n-HOMOMORPHISMS ON BANACH ALGEBRAS

  • Ebadian, Ali;Gordji, Madjid Eshaghi;Jabbari, Ali
    • Honam Mathematical Journal
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    • v.42 no.2
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    • pp.411-423
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    • 2020
  • In this paper, we correct some errors and typos of [2] and introduce a new concept related to pseudo n-Jordan homomorphisms, that we call it pseudo n-homomorphism. We investigate automatic continuity and positivity of pseudo n-homomorphisms and pseudo n-Jordan homomorphisms on Banach algebras and C*-algebras. Moreover, we show that the sum of two pseudo n-Jordan homomorphisms is not a pseudo n-Jordan homomorphism and we show that under some conditions the sum of two pseudo n-Jordan homomorphisms is a pseudo n-Jordan homomorphism.

Edge-flipping algorithm for computing the circle set Voronoi diagram (원 집합의 보로노이 다이어그램을 구하는 모서리 플립 알고리듬)

  • Kim Donguk;Kim Deok-Soo;Sugihara Kokichi
    • Proceedings of the Society of Korea Industrial and System Engineering Conference
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    • 2002.05a
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    • pp.467-472
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    • 2002
  • Presented in this paper is an algorithm to compute the Voronoi diagram of a circle set from the Voronoi diagram of a point set. The circles are located in Euclidean plane, the radii of the circles are non-negative and not necessarily equal, and the circles are allowed to intersect each other. The idea of the algorithm is to use the topology of the point set Voronoi diagram as a seed so that the correct topology of the circle set Voronoi diagram can be obtained through a number of edge flipping operations. Then, the geometries of the Voronoi edges of the circle set Voronoi diagram are computed. The main advantages of the proposed algorithm are in its robustness, speed, and the simplicity in its concept as well as implementation.

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Accurate Camera Calibration Using GMDH Algorithm (GMDH 알고리즘을 이용한 정확한 카메라의 보정기법)

  • Kim, Myoung-Hwan;Do, Yong-Tae
    • Proceedings of the KIEE Conference
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    • 2004.11c
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    • pp.592-594
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    • 2004
  • Camera calibration is an important problem to determine the relationship between 3D real world and 2D camera image. The existing calibration methods can be classified into linear and non-linear models. The linear methods are simple and robust against noise, but the accuracy expectation is generally poor. In comparison, if the non-linearity, which is due mainly to lens distortion, is corrected, the accuracy can be better. However, as the optical features of lens are diverse, no non-linear method can be always effective for diverse vision systems. In this paper, we propose a new approach to correct the calibration error of a linear method using GMDH algorithm. The proposed technique is simple in concept and showed improved accuracy in various cases.

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