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Journal articles on the topic 'Circle'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Shemyakina, E. "Pencils of circles with a straight line and circle as the basic elements." Differential Geometry of Manifolds of Figures, no. 50 (2019): 169–76. http://dx.doi.org/10.5922/0321-4796-2019-50-19.

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Pencils of circles with are a straight line and a circle as the basic elements are investigated. Three cases of arrangement of a basic straight line and a circle are considered: when the straight line does not intersect a circle, when the straight line and a circle have one generic point, and when the straight line intersects a circle in two points. A parameter is entered and the equations of new pencils of circles are registered. By means of mathematical manipulations the obtained equations are given to the initial equation of a circle. Different values are attached to the parameter and the c

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2

Shulman, Gordon L. "Attentional Modulation of Size Contrast." Quarterly Journal of Experimental Psychology Section A 45, no. 4 (1992): 529–46. http://dx.doi.org/10.1080/14640749208401332.

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A test circle surrounded by smaller context circles appears larger if presented in isolation, whereas a test circle surrounded by large context circles is seen as smaller than in isolation. Two experiments are reported indicating that this phenomenon, the Ebbinghaus illusion, depends on whether subjects are attending to the context circles. Subjects first saw a reference circle and then a briefly presented (150 msec) test circle. Their task was to determine whether the test circle was larger or smaller than the reference. The test circle was surrounded by smaller context circles of one colour

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3

Chiang, Ching-Shoei, and Hung-Chieh Li. "An Algorithm for Designing Circles in a Bubble Chart." Axioms 14, no. 3 (2025): 175. https://doi.org/10.3390/axioms14030175.

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In this study, we investigated circle design in a bubble chart. The bubble chart that we designed has a unit circle at the center and is surrounded by a series of layered circle rings. In order to add the next layer of circles, there is always a silhouette circle that is tangential to all circles in the newest layer. The extension of the circle is partitioned into two classes: one in which each layer has the same number of circles with the same radii, and another in which the new layer has circles with different radii. We solve this problem geometrically and/or algebraically if the problem is

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4

Hu, Ying Lu, Wang Bin, Jian Hua Sun, et al. "The Effect of Laser Processing Area on Nested-Circle Drilling Method." Advanced Materials Research 1082 (December 2014): 133–37. http://dx.doi.org/10.4028/www.scientific.net/amr.1082.133.

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A laser drilling technique named the nested-circle method is introduced in this work, in the respect of short-pulse laser processing.it is found that, as the power increases, the depth to diameter ratio of the hole will increase and the minimum number of circles can be set drilled hole reliably is reduced. Further studies have been carried out on the effect of the number of circles in the nested-circle method. Keys of settings the nested-circle method parameters—Outer circle diameter ‘D1’, Inner circle diameter ‘D2’, The Number of circles ‘R’—have been found out.

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5

Adam, Everett E. "Quality Circle Performance." Journal of Management 17, no. 1 (1991): 25–39. http://dx.doi.org/10.1177/014920639101700103.

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Quality circle advocates suggest a wide array of positive results when this participation technique is used. This study explores the importance of company, employee group (circle or non-circle), and time as well as their interactions. Assessment of circle performance was measured by employee attitudes, actual performance, and facilitator perception. This study did not support small group behavior and group dynamics research, as well as quality circle case study reports, that suggest attitudes will improve when quality circles are formed and will remain improved over time. Actual performance in

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6

KIM, DONGUK, DEOK-SOO KIM, and KOKICHI SUGIHARA. "EUCLIDEAN VORONOI DIAGRAM FOR CIRCLES IN A CIRCLE." International Journal of Computational Geometry & Applications 15, no. 02 (2005): 209–28. http://dx.doi.org/10.1142/s021819590500166x.

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Presented in this paper is an algorithm to compute a Euclidean Voronoi diagram for circles contained in a large circle. The radii of circles are not necessarily equal and no circle inside the large circle wholly contains another circle. The proposed algorithm uses the ordinary point Voronoi diagram for the centers of inner circles as a seed. Then, we apply a series of edge-flip operations to the seed topology to obtain the correct topology for the desired one. Lastly, the equations of edges are represented in a rational quadratic Bézier curve form.

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7

Calvo, R., A. Arteaga, and R. Domingo. "A comparison of fitting criteria for circle arc measurement applications." IOP Conference Series: Materials Science and Engineering 1193, no. 1 (2021): 012073. http://dx.doi.org/10.1088/1757-899x/1193/1/012073.

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Abstract Measuring circular shape is a main task of dimensional metrology, characterized by circle diameter and its roundness, both for full circles and circle arcs. Point coordinates allows measuring both arcs and full circle, by fitting to substitution geometry, in many cases by least-squares criteria and fitting. Nevertheless, circle shape can be also characterized by the minimum zone, minimum circumscribed and maximum inscribed circles. This research presents a systematic experimental analysis of results of normal distributed points around the substitution circle through simulation, for di

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8

Mendoza, Jess, Cecilia Genuino, and Maria Elizabeth De Luna. "Verb Complementation in News Headlines by the Inner, Outer, and Expanding Circles." International Journal of Language and Literary Studies 1, no. 3 (2019): 43–59. http://dx.doi.org/10.36892/ijlls.v1i3.55.

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The English language has survived the pangs of giving birth to its variations commonly called as World Englishes. Though there are many “Englishes” in the globe today, they do have similarities and differences which are manifested in the different styles employed by writers around the world. In this regard, the study aimed to analyze the structure of verb phrases in news headlines of the different countries in Kachru’s three concentric circles leading to the identification of types of verbs used. This is done to give fresher ideas into the style of headline writing by understanding what types

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9

Aeunah, Een, Abdul Aziz, Caecilia Jilia Joe, and Cut Dihe Zayhaqqi Ali. "ANALYSIS OF STUDENTS' DIFFICULTIES IN LEARNING MATHEMATICS OF CIRCLE GEOMETRY IN FOURTH GRADE ELEMENTARY SCHOOL." ROMEO REVIEW OF MULTIDISCIPLINARY EDUCATION CULTURE AND PEDAGOGY 2, no. 3 (2023): 155–59. http://dx.doi.org/10.55047/romeo.v2i3.751.

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The present study endeavors to comprehensively examine the obstacles faced by elementary school students when attempting to grasp fundamental mathematical concepts pertaining to circles. Specifically focusing on Grade 4 students at SDN Cipondoh 2, Tangerang City. The primary objective is to shed light on the difficulties encountered by students in three core areas: calculating circle area and circumference, understanding the complex concept of π (pi), and accurately sketching circles utilizing a compass. Various tools are employed to scrutinize the obstacles students encounter, including tasks

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10

A. Al-Mutairi, Mohammad. "Kachru’s Three Concentric Circles Model of English Language: An Overview of Criticism & the Place of Kuwait in it." English Language Teaching 13, no. 1 (2019): 85. http://dx.doi.org/10.5539/elt.v13n1p85.

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This paper attempts to examine in a descriptive way the pioneering model of &ldquo;World Englishes&rdquo; proposed by Kachru in the mid-1980s that allocates the presence of English into three concentric circles: The Inner Circle, the Outer Circle, and the Expanding Circle. The Inner Circle presents the countries where English is used as a native language and as a first language among people. These countries include the USA, the UK, Canada, Australia, and New Zealand. The Outer Circle includes countries that have old historical British colonial relations and where English is commonly us

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11

WANG, LIANG, HONGXUN YAO, and H. D. CHENG. "EFFECTIVE AND AUTOMATIC CALIBRATION USING CONCENTRIC CIRCLES." International Journal of Pattern Recognition and Artificial Intelligence 22, no. 07 (2008): 1379–401. http://dx.doi.org/10.1142/s0218001408006831.

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In this paper, we present an effective, flexible and completely automated camera calibration approach using only one pair of concentric circles. This approach utilizes the characteristics of concentric circles' tangent lines to locate the center of these circles, and finds the geometric constraints for calibration based on the orthogonality formed by a point on the circle and the two intersected points of the circle with the line through the center of the circle. The entire process requires no conic equation fitting and no metric measurement of the test pattern, which is very flexible to imple

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12

Lis, Artur. "ECONOMIC AND UNIQUE WOMEN. RURAL HOUSE WHEELS IN THE LAW." Roczniki Administracji i Prawa 2, no. XXII (2022): 343–54. http://dx.doi.org/10.5604/01.3001.0016.0989.

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The review article was devoted to the publication by Grzegorz Krawiec entitled „The act on rural housewives’ circles. Comment”. On the basis of the Act on Rural Housewives’ Circles of November 9, 2018, a separate organizational formula was created for KGW, which are voluntary, independent and self-governing social organizations of rural residents. Based on the previously applicable legal regulations, KGW could be established within agricultural circles as their independent units. They could also function in the form of associations. An important statutory solution is to grant KGW a legal perso

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13

Ou, Yun, Honggui Deng, Yang Liu, et al. "A Fast Circle Detection Algorithm Based on Information Compression." Sensors 22, no. 19 (2022): 7267. http://dx.doi.org/10.3390/s22197267.

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Circle detection is a fundamental problem in computer vision. However, conventional circle detection algorithms are usually time-consuming and sensitive to noise. In order to solve these shortcomings, we propose a fast circle detection algorithm based on information compression. First, we introduce the idea of information compression, which compresses the circular information on the image into a small number of points while removing some of the noise through sharpness estimation and orientation filtering. Then, the circle parameters stored in the information point are obtained by the average s

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14

Umbetov, N. "Demonstration of Common Elements of Involution on a Simple Example." Geometry & Graphics 10, no. 2 (2022): 27–34. http://dx.doi.org/10.12737/2308-4898-2022-10-2-27-34.

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The involution of projective rows with a common support, its geometric interpretation are considered. Taking the special case of the geometric interpretation of involution, the problem of constructing harmonically conjugate points is solved for given initial conditions, when one circle and a radical axis of this circle with a bundle of corresponding circles with a common radical axis are given. A proposal is given on the existence of a single circle in a bundle, the diametrical points of which on the lines of centers make up a harmonic four with diametral points of a given circle. It is shown

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15

BABAEI, Ali. "The Boiling Circle, the Rotating Circle (Two kinds of symbols of the Circle in Islamic Tradition)." WISDOM 18, no. 2 (2021): 162–75. http://dx.doi.org/10.24234/wisdom.v18i2.484.

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In theological sources, many symbols are used to explain the transcendent truths of existence. Among the shapes, the circle has the most use of a symbol which is important for Religious, philosophers, and mystics. However, what is refer mostly to the shape of a circle is the rotation of a circular line that begins at a point on a surface and ends at the same point; then, the most superficial and intermediate symbols of facts are explained with it. Contrary, the present article proposes a novel way of drawing a circle, and with this approach, examines some philosophical concepts. We call this d

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16

Orsel, Cansu, and Fatih Yavuz. "A Comparative study on English language teaching to young learners around the world." Contemporary Educational Researches Journal 7, no. 3 (2017): 114–18. http://dx.doi.org/10.18844/cerj.v7i3.2656.

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Usage of the English language as Lingua Franca has caused an increasing demand on the English Language Teaching (ELT) in early childhood and according to Braj Kachru’s Three Circles Model of World Englishes as the Inner Circle, the Outer Circle, and the Expanding Circle the approaches to the Young Learners dramatically differs. Besides the features of English as a global language and the nature of early language learning, this paper also focuses on the comparison of the three different examples from the Three Circles Model of World Englishes. They are compared in terms of techniques that are u

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17

Brigner, Willard L. "The Geometric Illusion and Induced Differences in Perceived Time." Perceptual and Motor Skills 67, no. 2 (1988): 373–74. http://dx.doi.org/10.2466/pms.1988.67.2.373.

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Just as circle-size induces differences in the perceived extent of a line which interconnects the circles of the Baldwin illusion, it is demonstrated that circle-size induces differences in the perceived duration of a time interval which intervenes between circles of different sizes.

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18

Кайынбаев, Жанбулат, та М. К. Нұрпейіс. "ШЕҢБЕР МЕН ДӨҢГЕЛЕККЕ БАЙЛАНЫСТЫ КҮРДЕЛІ ЕСЕПТЕРДІҢ БЕРІЛУ ТӘСІЛДЕРІ ЖӘНЕ ОЛАРДЫ ШЕШУ ЖОЛДАРЫ". Педагогика и методы обучения 60, № 3 (2022): 112–27. http://dx.doi.org/10.47344/sdu20bulletin.v60i3.822.

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The article is devoted to circles and circles, which are important issues in the content of elementary geometry, and ways to solve complex problems related to them. In general, difficult problems in this area include cases where one circle is inside another circle (these are two different things), when two circles have only one common point (there are two types of cases), when two circles intersect at two points and two circles do not have a ommon point. For each of these cases, solutions to difficult problems are discussed. The article also contains difficult tasks of drawing other shapes ins

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19

Garrett, Michael Tlanusta, J. T. Garrett, and Dale Brotherton. "Inner Circle/Outer Circle: A Group Technique Based on Native American Healing Circles." Journal for Specialists in Group Work 26, no. 1 (2001): 17–30. http://dx.doi.org/10.1080/01933920108413775.

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20

Suliano, Mufid Ramadhani. "Strategi Komunikasi Pemasaran E-Commerce Boogie.id Menggunakan IMC Model Dwi Sapta." Jurnal Komunikasi Global 9, no. 2 (2020): 300–315. http://dx.doi.org/10.24815/jkg.v9i2.17270.

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Boogie awalnya sempat menjadi top brand di bidang perlengkapan outdoor, namun perlahan mulai meredup. Penelitian ini bertujuan untuk mendeskripsikan strategi komunikasi pemasaran Boogie.id menggunakan IMC model Dwi Sapta yang membahas tentang discovery circle, intent circle, dan strategy circle. Jenis penelitian pada penelitian ini adalah deskriptif kualitatif. Pengumpulan data pada penelitian ini dilakukan melalui wawancara semi terstruktur dengan lima orang marketing Boogie. Teknik analisis data dalam penelitian ini menggunakan teknik yang dikemukakan oleh Miles dan Huberman. Hasil penelitia

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21

Wang, Qi Kui, You Dong Chen, Wei Li, Tian Miao Wang, and Hong Xing Wei. "Loci Conversion and Corner Smoothing with PH Curves in CNC System." Key Engineering Materials 419-420 (October 2009): 161–64. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.161.

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Free-form surface interpolation functions give more advantages in machining than the traditional line and circle functions. A method is developed to convert lines and circles into Pythagorean-hodograph (PH) curves. In order to get smooth machining process the PH curve is used to replace the joints of the circular/linear elements by the connection situation. The slope of line is used to get the tangent vector in the line conversion. When converting a circle to a PH curve, points of the divided circle are introduced to compute the vectors. The methods of computing tangent vectors are proposed ac

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22

Dewangan, Mamta, and Vandana Agrawal. "EVOLUTION OF TEMPLE ELEVATIONAL FORM WITH SQUARE CIRCLE METHOD: LAKSHMAN TEMPLE IN SIRPUR." Architecture and Engineering 8, no. 2 (2023): 3–13. http://dx.doi.org/10.23968/2500-0055-2023-8-2-3-13.

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One of the fundamental methods for shaping the constructional geometry of any building is the use of basic shapes: circles and squares. The circle represents vitality or energy, while the square represents strength. In world history, the concept of geometry traces its origins to construction in Egypt and Babylonia, where proportional systems were described through mathematical equations. They later became known as the Pythagorean Theorem, named after Pythagoras. In Ancient India, the concept of geometry starts with the construction of altars for Vedic sacrifices, as per the instructions of the

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23

Popescu, Iulian, Ludmila Sass, and Alina Elena Romanescu. "Rolling with and without Slipping, during Epicycloids Generation." Applied Mechanics and Materials 880 (March 2018): 63–68. http://dx.doi.org/10.4028/www.scientific.net/amm.880.63.

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The starting point consists in the modality to generate epicycloids when two external circles are considered. The mobile circle is rolling on the fix circle without slipping, such as two arcs belonging to these circles are equal. The specialty literature presents an example with a simple planetary gear in which the “satellite porting” arm provides the rolling of the mobile circle on the fix circle. Our original idea, not approached in the specialty literature, considers the rolling with slipping of the mobile circle on the fix circle. Instead of the gears providing the rolling without slipping

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Robertus Daya. "ANALYSIS OF ABILITY IN UNDERSTANDING MATHEMATICS CONCEPTS ON THE CIRCULAR MATERIAL OF STUDENTS OF CLASS VIII OF SMP NEGERI 2 BAY IN THE 2020/2021 STUDY YEAR." AFORE : Jurnal Pendidikan Matematika 1, no. 2 (2023): 148–55. http://dx.doi.org/10.57094/afore.v1i2.725.

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This research is motivated by the ability to understand students' mathematical concepts which are still in the low category. This study aims to 1) describe the ability to understand mathematical concepts in the circle material for class VIII students of SMP Negeri 2 Telukdalam, 2) describe the students' difficulties in solving questions about the ability to understand mathematical concepts in the circle material. This research uses a type of qualitative research with descriptive research methods. The informants in this study were all students of class VIII SMP Negeri 2 Telukdalam, namely 25 pe

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25

Jaeger, Ted, and Katherine Grasso. "Contour Lightness and Separation Effects in the Ebbinghaus Illusion." Perceptual and Motor Skills 76, no. 1 (1993): 255–58. http://dx.doi.org/10.2466/pms.1993.76.1.255.

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For 48 observers, the central circle of Ebbinghaus figures appeared smaller as the separation between it and the contextual circles increased. Lightness of the contours only affected the illusion when the contextual circles were large and located close to the central circle. An explanation incorporating size contrast and attraction between contours was offered.

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26

Polster, B., and G. F. Steinke. "Cut and Paste in 2-Dimensional Projective Planes and Circle Planes." Canadian Mathematical Bulletin 38, no. 4 (1995): 469–80. http://dx.doi.org/10.4153/cmb-1995-069-1.

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AbstractWe describe two methods to combine sets of lines of different 2-dimensional projective planes into line sets of new 2-dimensional projective planes. Using these methods we describe several ways in which sets of circles of different 2-dimensional circle planes can be combined into circle sets of new 2-dimensional circle planes.

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27

Nastro, Vincenzo, and Urbano Tancredi. "Great Circle Navigation with Vectorial Methods." Journal of Navigation 63, no. 3 (2010): 557–63. http://dx.doi.org/10.1017/s0373463310000044.

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The present paper is concerned with the solution of a series of practical problems relevant to great circle navigation, including the determination of the true course at any point on the great circle route and the determination of the lateral deviation from a desired great circle route. Intersection between two great circles or between a great circle and a parallel is also analyzed. These problems are approached by means of vector analysis, which yields solutions in a very compact form that can be computed numerically in a very straightforward manner. This approach is thus particularly appeali

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28

Piggins, David, John A. Wilson, and James O. Robinson. "Stereokinetic Interaction Effects Involving Static and Slowly Moving Identical Figures." Perceptual and Motor Skills 83, no. 2 (1996): 387–400. http://dx.doi.org/10.2466/pms.1996.83.2.387.

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Here a new depth effect evoked by the spatial and temporal interaction in 2-D of a slowly moving circle (optimally at 0.6 rads/sec.) with an identical static circle is reported. Typically, respondents report that with increasing adjacency, commencing with separations of a few diameters, the moving circle appears in a different plane of depth to the static circle, it then usually appears to “dip” onto the static circle and after complete coincidence with it to rise away from it. This effect, together with a number of associated descriptions are commented upon, in addition to observations when v

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29

Cox, J., and B. G. Dale. "Quality Circle Members' Views on Quality Circles." Leadership & Organization Development Journal 6, no. 2 (1985): 20–23. http://dx.doi.org/10.1108/eb053574.

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30

Herlina, Iin, Agus Suryana, and Muhamad Azhar Alwahid. "Learning Design Cooperative Learning Inside-Outside Circle in Indonesian Language Lessons at Madrasah Ibtidaiyah: A Literature Review." Tarbiatuna: Journal of Islamic Education Studies 2, no. 2 (2022): 168–94. http://dx.doi.org/10.47467/tarbiatuna.v2i2.1097.

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The writing of this article aims to find out the design of the inside-outside circle cooperative learning learning design, namely, 2. The advantage of the Inside Outside Circle technique is that there is a clear structure and allows students to share with different partners briefly and regularly. In addition, students work with fellow students in a cooperative atmosphere and have many opportunities to process information and improve communication skills. The steps for the design of the inside-outside circle cooperative learning technique in Indonesian lessons are that half of the students form

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31

Liebersohn, Yosef Z. "Crito's Social Circles in Plato's Crito." Classica et Mediaevalia 72 (April 27, 2023): 37–80. http://dx.doi.org/10.7146/classicaetmediaevalia.v72i.137098.

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In this paper I identify and discuss three different circles concerning Crito’s social relations: the internal circle of those who know him well; the external circle of those who are Crito’s fellow citizens but who do not know him well; and the third circle which is the polis with its laws. Crito uses – both consciously and unconsciously – different stratagems in dealing with these different circles. The speech of the Laws is Socrates’ attempt to allow Crito to see his actual behavior, as if reflected in a mirror. In fact Crito harms his friends, cheats his fellow citizens and destroys the pol

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Kapranov, Oleksandr. "Modal Verbs in Research Article Abstracts in Applied Linguistics: Juxtaposing Discursive Practices of the Inner and Outer Circles of English." East-West Cultural Passage 22, no. 2 (2022): 6–34. http://dx.doi.org/10.2478/ewcp-2022-0013.

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Abstract The article introduces and discusses a computer-assisted study that seeks to shed light on the frequency and use of the central modal verbs (can, could, may, might, must, shall, should, will, would) in research article (further: RA) abstracts in applied linguistics published in the Inner and Outer Circles of English, respectively. The study is informed by the construal of the Circles of English that are comprised of the Inner Circle, where English is spoken as the mother tongue (for example, the United Kingdom), the Outer Circle, where it is used as a second language in the former Bri

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Djafar, Muhammad Kabil, La Ode Safiuddin, Lilis Laome, et al. "USING A MONOTONE SEQUENCE OF FUNCTIONS TO DETERMINE THE SHORTEST ARC LENGTH OF CIRCLES CONNECTED ANY TWO POINTS ON SPHERE." BAREKENG: Jurnal Ilmu Matematika dan Terapan 19, no. 3 (2025): 1923–32. https://doi.org/10.30598/barekengvol19iss3pp1923-1932.

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This paper discusses about arc length of circles that connected any two points on a sphere. On a sphere, there are infinitely many circles that connect any two points. Using a monotone sequence of functions, we can show that the shortest arc length of circle that connect any two points on sphere is the circle with its center at the origin.

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GDAWIEC, KRZYSZTOF. "STAR-SHAPED SET INVERSION FRACTALS." Fractals 22, no. 04 (2014): 1450009. http://dx.doi.org/10.1142/s0218348x14500091.

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In the paper, we generalized the idea of circle inversion to star-shaped sets and used the generalized inversion to replace the circle inversion transformation in the algorithm for the generation of the circle inversion fractals. In this way, we obtained the star-shaped set inversion fractals. The examples that we have presented show that we were able to obtain very diverse fractal patterns by using the proposed extension and that these patterns are different from those obtained with the circle inversion method. Moreover, because circles are star-shaped sets, the proposed generalization allows

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35

Liu, Shengjun, Hongqian Guo, and Lihong Su. "Evaluation of Quality of Life in Urban Life Circles from a Composite Perspective of Subjective Needs and the Supply of Public Amenities: A Case Study of Changbai Island, Shenyang." Sustainability 15, no. 13 (2023): 10095. http://dx.doi.org/10.3390/su151310095.

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Evaluating the quality of life in life circles is an important prerequisite for effective life circle governance. Most studies evaluate the quality of life in life circles from either the living environment or public amenity supply perspective, and few adopt a composite perspective of these. This study developed an index system for evaluating the quality of life in life circles from both these perspectives, based on data from Changbai Island, Shenyang. We measured the living environment, amenity service, and quality of life indexes of urban life circles and analysed the spatial relationship be

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Richter, Wolf-Dieter, та Vincent Wenzel. "Mysterious Circle Numbers.Does πp,q Approach πp When q Is Tending to p ?" Mathematics 7, № 9 (2019): 822. http://dx.doi.org/10.3390/math7090822.

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This paper aims to introduce a mathematical-philosophical type of question from the fascinating world of generalized circle numbers to the widest possible readership. We start with recalling well-known (in part from school) properties of the polygonal approximation of the common circle when approximating the famous circle number π by convergent sequences of upper and lower bounds being based upon the lengths of polygons. Next, we shortly refer to some results from the literature where suitably defined generalized circle numbers of l p - and l p , q -circles, π p and π p , q , respectively, are

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ANDRIEȘ, Vasile, and Valeria BOTEZATU. "The role and functionality of school circles in the view of the students." Univers Pedagogic 79, no. 3 (2023): 92–100. http://dx.doi.org/10.52387/1811-5470.2023.3.13.

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Extracurricular activities are carried out both within extracurricular institutions (art schools, music schools, creative centers, clubs) and within school institutions through student circles. The authors proposed to identify the students’ position regarding the functioning of school circles, externalizing a series of aspects, such as: the source of information about the existence of the circle; motivation for joining the circle; teacher-student relationship; the relationship between students; teaching methods; evaluation method; the skills developed within school circles.

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Li, Shaodong, Zhijiang Du, Hongjian Yu, and Jiafu Yi. "A Robust Multi-Circle Detector Based on Horizontal and Vertical Search Analysis Fitting with Tangent Direction." International Journal of Pattern Recognition and Artificial Intelligence 33, no. 04 (2019): 1954013. http://dx.doi.org/10.1142/s0218001419540132.

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In this paper, we propose an efficient Multi-Circle detector which follows the fixed search order. The method makes use of horizontal and vertical search to realize circle detection, which is named as HVCD. First, this method computes edge areas in a given image. The edge areas could be divided into some regions by means of region growing. Each of regions could be efficiently searched to achieve not only one-pixel wide edges but edge segments as well. Next, the candidate circles can be extracted from every edge segment. Finally, the circle candidates could be validated with the help of Helmhol

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Ji, Yi, Zilong Wang, and Dan Zhu. "Exploring the Impact of Urban Amenities on Business Circle Vitality Using Multi-Source Big Data." Land 13, no. 10 (2024): 1616. http://dx.doi.org/10.3390/land13101616.

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Urban business circles are important locations for economic and social activities. Improving the vitality of urban business circles is conducive to stimulating the potential of the consumer market and promoting sustainable economic development. However, targeted research on the factors influencing business circle vitality is lacking. Therefore, in this study, we aimed to quantitatively examine the impact of the number and diversity of urban amenities on business circle vitality at the street block level using open-source geospatial big data from 32 Chinese metropolises. We found that the numbe

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Fujimuraa, Masayo. "The complex geometry of Blaschke products of degree 3 and associated ellipses." Filomat 31, no. 1 (2017): 61–68. http://dx.doi.org/10.2298/fil1701061f.

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A bicentric polygon is a polygon which has both an inscribed circle and a circumscribed one. For given two circles, the necessary and sufficient condition for existence of bicentric triangle for these two circles is known as Chapple?s formula or Euler?s theorem. As one of natural extensions of this formula, we characterize the inscribed ellipses of a triangle which is inscribed in the unit circle. We also discuss the condition for the ?circumscribed? ellipse of a triangle which is circumscribed about the unit circle. For the proof of these results, we use some geometrical properties of Blaschk

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Kurniawan, Hasyim, Rio Moehkardi, and Nabila Muliawati. "REVISITING THE ENGLISH STATUS IN THE OUTER AND EXPANDING CIRCLES: INSIGHTS FROM GOOGLE STREET VIEW®." LLT Journal: A Journal on Language and Language Teaching 27, no. 1 (2024): 461–97. http://dx.doi.org/10.24071/llt.v27i1.7659.

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Globalization and glocalization may affect the use of English in Kachru’s (1986) Outer Circle and Expanding Circle countries. This study revisits the status of English by observing its use in the commercial signboards in Malaysia (Petaling Street) and the Philippines (Colon Street), representing the Outer Circle, Thailand (Khao San Road), and Indonesia (Legian Street), representing the Expanding Circle. Using Google Street View®, 557 signages were screen-captured, and their brand names, information, and slogan parts were analyzed. The finding shows that English is predominant on almost all sig

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Haggarty, Alison, Audrey Henshall, Richard Grove, et al. "Machrie Moor, Arran: recent excavations at two stone circles." Proceedings of the Society of Antiquaries of Scotland 121 (November 30, 1992): 51–94. http://dx.doi.org/10.9750/psas.121.51.94.

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Excavations at stone circles 1 and 11 on Machrie Moor revealed previous use of the land on which they were situated, with features dating back to the earlier Neolithic. The exact positions occupied by both circles were found to have been preceded by timber monuments, comprising several elements in the case of circle 1. Evidence for fenced land divisions and ard ploughing between the timber and stone phases was also recovered. Both stone circles contained a single inserted cremation deposit. Stone circle 1 had been dug into in 1861 by James Bryce but circle 11 was previously untouched, having b

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Görög, Augustín. "Number of Points for Roundness Measurement - Measured Results Comparison." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 19, no. 30 (2011): 19–24. http://dx.doi.org/10.2478/v10186-010-0035-x.

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Number of Points for Roundness Measurement - Measured Results Comparison Paper deals with filtering roundness. It presents experimental results measured for roundness turning and cylindrical grinding. Roundness was measured using Prismo Navigator 5 coordinate measuring machine. Evaluation was done by four methods: Minimum zone reference circles (MZCI), Least squares reference circle (LSCI), Minimum circumscribed reference circle (MCCI) and Maximum inscribed reference circle (MICI). The filters used were: Gauss, Spline and no filter.

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Emecen, Sevim, and Arif Sarıçoban. "CULTURAL DISTRIBUTION IN ENGLISH TEXTBOOKS ACROSS THREE CIRCLES." EKEV Akademi Dergisi, no. 102 (June 15, 2025): 343–62. https://doi.org/10.17753/sosekev.1671577.

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This study evaluates the cultural material contained in texts and visuals of English textbooks developed across multiple English-speaking regions as per Kachru's three-circles paradigm. The research examines textbook presentation quality of cultural elements based on Kachru's inner and outer along with expanding circles as well as their geographical dispersion balance. Students gain numerous advantages from multicultural approaches to English Language instruction since cultural elements implement both academic and social advantages for intercultural communicative competence. This study conduct

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Kirkpatrick, Jamie B., Alistair Deane, and Jared Parry. "The dynamics of rush circles in subalpine grassland." Australian Journal of Botany 67, no. 4 (2019): 335. http://dx.doi.org/10.1071/bt18151.

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Geometric patterning in vegetation is often the result of cyclic succession, although circular forms sometimes result from the clonal growth of individual plants. We investigated whether cyclic succession or clonal growth created patterns in Poa subalpine grassland with rush (Empodisma minus) circles on the Central Plateau of Tasmania, Australia. We mapped change in the number, size and reflectance of the rush circles from 1953 to 2011 using aerial photographs, tested whether the circles occurred in distinct microenvironments, and whether the circles were likely to be individuals and determine

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Yershov, V. N., and A. A. Nemiro. "An Autocollimation Circle Reading System for the Infrared Meridian Instrument." Symposium - International Astronomical Union 166 (1995): 361. http://dx.doi.org/10.1017/s0074180900228441.

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A new autocollimation circle reading system is proposed for the reflector meridian circle (Nemiro and Streletsky, 1988). The instrument will be used for observations in the K-infrared waveband. Instead of the divided circle fixed to the instrument tube the new system has small spherical mirrors polished at the lateral surfaces of the primary mirror. The primary mirror is made from sitall and has an autocollimation system aimed at monitoring its optical axis position. The small spherical mirrors of the circle reading system link the circle readings with the primary's optical axis. The divided c

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Zhou, Bing, and Yang He. "Fast Circle Detection Using Spatial Decomposition of Hough Transform." International Journal of Pattern Recognition and Artificial Intelligence 31, no. 03 (2017): 1755006. http://dx.doi.org/10.1142/s0218001417550060.

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Circles are important patterns in many automatic image inspection applications. The Hough Transform (HT) is a popular method for extracting shapes from original images. It was first introduced for the recognition of straight lines, and later extended to circles. The drawbacks of standard Hough Transform (SHT) for circle detection are the large computational and storage requirements. In this paper, we propose a modified HT called Vector Quantization of Hough Transform (VQHT) to detect circles more efficiently. The basic idea is to first decompose the edge image into many subimages by using Vect

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Графский, O. Grafskiy, Пономарчук, and Yu Ponomarchuk. "On One Property of a Circle on the Coordinate Plane." Geometry & Graphics 5, no. 2 (2017): 13–24. http://dx.doi.org/10.12737/article_5953f2af770c35.65774157.

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Descartes’ and Fermat's method allowed to define many geometrical forms, including circles, on the coordinate plane by means of the arithmetic equations and to make necessary analytical operations in order to solve many problems of theoretical and applied research in various scientific areas, for example. However, the equations of a circle and other conics in the majority of research topics are used in the subsequent analysis of applied problems, or for analytical confirmation of constructive solutions in geometrical research, according to Russian geometrician G. Monge and others, including. I

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Brown, Matthew R. "Laguerre geometries and some connections to generalized quadrangles." Journal of the Australian Mathematical Society 83, no. 3 (2007): 335–56. http://dx.doi.org/10.1017/s1446788700037964.

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AbstractA Laguerre plane is a geometry of points, lines and circles where three pairwise non-collinear points lie on a unique circle, any line and circle meet uniquely and finally, given a circle C and a point Q not on it for each point P on C there is a unique circle on Q and touching C at P. We generalise to a Laguerre geometry where three pairwise non-collinear points lie on a constant number of circles. Examples and conditions on the parameters of a Laguerre geometry are given.A generalized quadrangle (GQ) is a point, line geometry in which for a non-incident point, line pair (P. m) there

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Im, HunTaek, and Eun-Sung Ko. "Analysis of the teaching content and teaching method for the area of a circle by elementary mathematics curriculum: from the 1st curriculum to the 2015 revised curriculum." Korean Association For Learner-Centered Curriculum And Instruction 22, no. 18 (2022): 695–709. http://dx.doi.org/10.22251/jlcci.2022.22.18.695.

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Objectives In this study, the teaching content and teaching method of the circle area were analyzed in elementary mathematics textbooks from the 1st curriculum to the 2015 revised curriculum. Methods In this study, in order to compare and analyze the teaching content and teaching method of the area of a circle presented in elementary mathematics textbooks from the 1st curriculum to the 2015 revised curriculum, based on previous studies, the analysis focus was focused on the teaching content of the area of the circle(a teaching of approximation of the area of a circle, a method of finding

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