• Title/Summary/Keyword: geometry text

Search Result 31, Processing Time 0.029 seconds

Comparative Study on Mathematics Text-book of Secondary Schools in South and North Korea -From the Viewpoint of the Region of Algebra, Statistics, Analysis and Geometry- (남.북한 중등학교 수학 교과서의 영역별 내용 비교 분석 -대수, 통계, 해석, 기하 영역을 중심으로-)

  • Kim, Sam-Tae;Lee, Sik
    • The Mathematical Education
    • /
    • v.38 no.1
    • /
    • pp.1-14
    • /
    • 1999
  • It has already been fifty years since the Korean peninsula was divided into two nations, South and North Korea. Owing to forming different political and social structures with each other, we can conjecture that there are much heterogeneity in education. On the assumption that education plays important role in coming to an accommodation and in restoring homogeneity of the Korean race after unification, we consider the investigation of the contents of mathematics text-book of secondary schools as a meaningful research to make provision against unification. In this paper, we shall investigate the learning contents, and the teaming substances and sequences in mathematics of secondary schools between South and North Korea by falling into four regions; algebra and statistics, analysis and geometry. By grasping the special features of terms, teaming subject matters and learning substances, and clarifying their distinctions, we shall present some reforms measure of distinctions.

  • PDF

The Study on Relationship between Mobile Phone Text Usage and Hand Dexterity

  • Chae, Soo-Gyung
    • International Journal of Internet, Broadcasting and Communication
    • /
    • v.11 no.3
    • /
    • pp.77-86
    • /
    • 2019
  • The purpose of this study was to reveal how the agility of fingers directly involved in the use of mobile phones, a necessity for modern people, is related to the amount of text usage. To find out, 95 people who agreed to the purpose of this research without any limitation on visual and upper-geometry were selected. The research period was from June 27, 2018 to July 31, 2018. The evaluation tool used in this study was Grooved Pegboard, a standardized evaluation tool that measures hand dexterity, and the general characteristics of examinees such as age, text message amount, and a hand that using for text messages were investigated through interviews. Since text input methods vary depending on mobile phone types, unfamiliar methods of typing mobile phone characters can affect the speed of texting. As a result, there were significant differences in hand dexterity between age and gender. The rate of texting and hand dexterity were statistically significantly faster than those in their 20s and 30s (p<0.05), and in gender, women showed significantly faster texting and hand dexterity than men (p<0.05). However, it was not statistically significant to text usage and to the dexterity of the hand.

Augmenting Text Document by Controlling Its IR-Reflectance (적외선 반사 특성 제어를 통한 텍스트 문서 증강)

  • Park, Hanhoon;Moon, Kwang-Seok
    • Journal of Korea Multimedia Society
    • /
    • v.20 no.6
    • /
    • pp.882-892
    • /
    • 2017
  • Locally Likely Arrangement Hashing (LLAH) is a method that describes image features based on the geometry between their neighbors. Thus, it has been preferred to implement augmented reality on poorly-textured objects such as text documents. However, LLAH strongly requires that image features be detected with high repeatability and located at a distance from one another. To fulfill the requirement for text document, this paper proposes a method that facilitates the word detection in infrared (IR) range by adjusting the IR-reflectance of words. Specifically, the words are printed out with two different black inks: one is using the K(carbon black) ink only, the other is mixing the C(cyan), M(magenta), Y(yellow) inks. Since only the words printed out with the K ink is visible in IR range, a part of words are selected in advance to be used as features and printed out the K ink. The selected words can be robustly detected with high repeatability in IR range and this enables to implement augmented reality on text documents with high fidelity. The validity of the proposed method was verified through experiments.

A review on the change of content and method of geometry in secondary school with a focus on the proportional relations of geometric figures (초.중등 수학 교과서에서 기하 양 사이의 비례관계의 전개 방식에 대한 역사적 분석)

  • Kwon Seok-Il;Hong Jin-Kon
    • Journal for History of Mathematics
    • /
    • v.19 no.2
    • /
    • pp.101-114
    • /
    • 2006
  • The content and method of geometry taught in secondary school is rooted in 'Elements' by Euclid. On the other hand, however, there are differences between the content and structure of the current textbook and the 'Elements'. The gaps are resulted from attempts to develop the geometry education. Specially, the content and method for the proportional relations of geometric figures has been varied. In this study, we reviewed the changes of the proportional relations of geometric figures with pedagogical point of view. The conclusion that we came to is that the proportional relations in incommensurable case Is omitted in secondary school. Teacher's understanding about the proportional relations of geometric figures is needed for meaningful geometry education.

  • PDF

The Different Definition-Methods in School Geometry and the Diractical Implications (학교기하의 다양한 정의 방법과 그 교수학적 의의)

  • Kang, Heung-Gyu;Cho, Young-Mi
    • Journal of Educational Research in Mathematics
    • /
    • v.12 no.1
    • /
    • pp.95-108
    • /
    • 2002
  • In this article we drew out five definition-methods in school geometry. They are called synonymous method, denotative method, analytic method. And we analyzed them theoretically. On our analysis we tried to identify the level of common sense and the level of science in definition of those two levels on the definition-methods of circle. While the definition-method in elementary school could be regarded as the level of common sense, that in middle school could be considered as the level of science. Finally, we made the following didactical comments. Definitions in school mathematics might have the levels as regard to their roles. Thus, Mathematics teachers, curriculum developers, and text authors all need to recognize the subtle differences in the level of definition-methods.

  • PDF

Discrete Wavelet Transform for Watermarking Three-Dimensional Triangular Meshes from a Kinect Sensor

  • Wibowo, Suryo Adhi;Kim, Eun Kyeong;Kim, Sungshin
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • v.14 no.4
    • /
    • pp.249-255
    • /
    • 2014
  • We present a simple method to watermark three-dimensional (3D) triangular meshes that have been generated from the depth data of the Kinect sensor. In contrast to previous methods, which maintain the shape of 3D triangular meshes and decide the embedding place, requiring calculations of vertices and their neighbors, our method is based on selecting one of the coordinate axes. To maintain shape, we use discrete wavelet transform and constant regularization. We know that the watermarking system needs the information to be embedded; we used a text to provide that information. We used geometry attacks such as rotation, scales, and translation, to test the performance of this watermarking system. Performance parameters in this paper include the vertices error rate (VER) and bit error rate (BER). The results from the VER and BER indicate that using a correction term before the extraction process makes our system robust to geometry attacks.

Integrated Method for Text Detection in Natural Scene Images

  • Zheng, Yang;Liu, Jie;Liu, Heping;Li, Qing;Li, Gen
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.10 no.11
    • /
    • pp.5583-5604
    • /
    • 2016
  • In this paper, we present a novel image operator to extract textual information in natural scene images. First, a powerful refiner called the Stroke Color Extension, which extends the widely used Stroke Width Transform by incorporating color information of strokes, is proposed to achieve significantly enhanced performance on intra-character connection and non-character removal. Second, a character classifier is trained by using gradient features. The classifier not only eliminates non-character components but also remains a large number of characters. Third, an effective extractor called the Character Color Transform combines color information of characters and geometry features. It is used to extract potential characters which are not correctly extracted in previous steps. Fourth, a Convolutional Neural Network model is used to verify text candidates, improving the performance of text detection. The proposed technique is tested on two public datasets, i.e., ICDAR2011 dataset and ICDAR2013 dataset. The experimental results show that our approach achieves state-of-the-art performance.

On the Educational Study on Tangents of curves (접선 개념의 교육적 연구)

  • 조영미
    • Journal of Educational Research in Mathematics
    • /
    • v.9 no.1
    • /
    • pp.229-237
    • /
    • 1999
  • In this paper I examined the tangents to curves through the history of mathematics, expecially that of the Greek geometry and seventeenth century. The purpose of this examination is to show that the mathematical concept of curves is changed by the problems. And I analyzed the text books from the junior to high school. I found that the tangents which aretaught in junior school correspond to those of Greece, and the tangents in high school those of seventeenth century.

  • PDF