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Journal articles on the topic 'Jigsaw puzzle'

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Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Verdine, Brian N., Georgene L. Troseth, Robert M. Hodapp, and Elisabeth M. Dykens. "Strategies and Correlates of Jigsaw Puzzle and Visuospatial Performance by Persons With Prader-Willi Syndrome." American Journal on Mental Retardation 113, no. 5 (September 1, 2008): 343–55. http://dx.doi.org/10.1352/2008.113:342-355.

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Abstract Some individuals with Prader-Willi syndrome exhibit strengths in solving jigsaw puzzles. We compared visuospatial ability and jigsaw puzzle performance and strategies of 26 persons with Prader-Willi syndrome and 26 MA-matched typically developing controls. Individuals with Prader-Willi syndrome relied on piece shape. Those in the control group used a different, picture-focused strategy. Individuals with Prader-Willi syndrome performed better than did the control group on an achromatic interlocking puzzle, whereas scores on puzzles with pictures (interlocking or noninterlocking) did not differ. Visuospatial scores related to performance on all puzzles in the control group and on the noninterlocking puzzle in the Prader-Willi syndrome group. The most proficient jigsaw puzzlers with Prader-Willi syndrome tended to be older and have shape-based strategies.

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2

Foreman, Robert Long. "Jigsaw Puzzle." River Teeth: A Journal of Nonfiction Narrative 17, no. 1 (2015): 25–27. http://dx.doi.org/10.1353/rvt.2015.0027.

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3

Brandler, Sondra. "The Jigsaw Puzzle." Social Work With Groups 11, no. 1-2 (October 28, 1988): 99–109. http://dx.doi.org/10.1300/j009v11n01_08.

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4

Zhang, Xuewei, and XiaoJie Liu. "JAVA Jigsaw Puzzle." International Journal of Advanced Pervasive and Ubiquitous Computing 9, no. 3 (July 2017): 1–14. http://dx.doi.org/10.4018/ijapuc.2017070101.

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With the development of society, the computer has become an indispensable part of people's daily life, especially in the study, and it plays an important role in their respective fields. Under the influence of the rapid development of computer, computer games are also thriving. Jigsaw puzzle is one of them. It has a wide range of applications, but also for young and old. The game can not only exercise manual ability, observation ability, but also cultivate the ability of cooperation between people.

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5

Sanches, MariaM, AnaI Pinto, PauloL Filipe, and JoaoM Silva. "“Jigsaw puzzle” advancement flap." Journal of Cutaneous and Aesthetic Surgery 11, no. 4 (2018): 248. http://dx.doi.org/10.4103/jcas.jcas_38_18.

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6

Collins, James P. "Studying Nature's Jigsaw Puzzle." Ecology 87, no. 7 (July 2006): 1867–68. http://dx.doi.org/10.1890/0012-9658(2006)87[1867:snjp]2.0.co;2.

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7

Verkuyten, Maykel, Borja Martinovic, and Anouk Smeekes. "The Multicultural Jigsaw Puzzle." Personality and Social Psychology Bulletin 40, no. 11 (September 9, 2014): 1480–93. http://dx.doi.org/10.1177/0146167214549324.

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8

Cadet, Peggy. "Solving the Jigsaw Puzzle." Narrative Inquiry in Bioethics 5, no. 2 (2015): E1—E3. http://dx.doi.org/10.1353/nib.2015.0043.

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9

Shephard, G. C. "A jigsaw problem." Mathematical Gazette 93, no. 526 (March 2009): 58–65. http://dx.doi.org/10.1017/s0025557200184189.

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Recently, when solving a jigsaw puzzle, I noticed that many of the pieces were symmetric in some sense; they had either reflective or rotational symmetry. This made me wonder if it was possible for all the pieces in a puzzle to be different shapes, and yet have some prescribed symmetry.

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10

Kusnanto, Kusnanto, Eska Dwi Prajayanti, and Harmayetty Harmayetty. "JIGSAW PUZZLE IMPROVE FINE MOTOR ABILITIES OF UPPER EXTREMITIES IN POST-STROKE ISCHEMIC CLIENTS." Jurnal Ners 12, no. 1 (June 5, 2017): 142. http://dx.doi.org/10.20473/jn.v12i1.2790.

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Introduction: Ischemic stroke is a disease caused by focal cerebral ischemia, where is a decline in blood flow that needed for neuronal metabolism, leading to neurologic deficit include motor deficit such as fine motor skills impairment. Therapy of fine motor skills disorders is to improve motor function, prevent contractures and complications. These study aimed to identify the effect of playing Jigsaw Puzzle on muscle strength, extensive motion, and upper extremity fine motor skills in patients with ischemic stroke at Dr. Moewardi Hospital, Surakarta. Methods: Experimental Quasi pre-posttest one group control. The number of samples were 34 respondents selected using purposive sampling technique. The samples were divided into intervention and control groups. The intervention group was 17 respondents who were given standard treatment hospital and played Jigsaw Puzzle 2 times a day for six days. Control group is one respondent given by hospital standard therapy without given additional Jigsaw Puzzle game. Evaluation of these research is done on the first and seventh day for those groups. Result: The results showed that muscle strength, the range of joint motion and fine motor skills of upper extremities increased (p = 0.001) significantly after being given the Jigsaw Puzzle games. These means playing Jigsaw Puzzle increase muscle strength, the range of joint motion and upper extremity fine motor skill of ischemic stroke patients. Discussion and conclusion: Jigsaw puzzle game administration as additional rehabilitation therapy in upper extremity fine motor to minimize the occurrence of contractures and motor disorders in patients with ischemic stroke. Jigsaw puzzle game therapy capable of creating repetitive motion as a key of neurological rehabilitation in Ischemic Stroke. This study recommends using jigsaw puzzle game as one of intervention in the nursing care of Ischemic Stroke patients.

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11

Awan, Shabir, and Waqas Raza. "Back Pain: A Jigsaw Puzzle." Acta Scientific Orthopaedics 2, no. 11 (October 17, 2019): 36–39. http://dx.doi.org/10.31080/asor.2019.02.0116.

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12

Sjåfjell, Beate. "The Jigsaw Puzzle of Sustainability." European Company Law 9, Issue 2 (April 1, 2012): 51–52. http://dx.doi.org/10.54648/eucl2012009.

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13

Farn, En-Jung. "Jigsaw puzzle images for steganography." Optical Engineering 48, no. 7 (July 1, 2009): 077006. http://dx.doi.org/10.1117/1.3159872.

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14

Heinrichs, Arianne. "Solving a 3D jigsaw puzzle." Nature Reviews Molecular Cell Biology 9, no. 1 (January 2008): 3. http://dx.doi.org/10.1038/nrm2316.

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15

Nežerka, V., M. Somr, T. Janda, J. Vorel, M. Doškář, J. Antoš, J. Zeman, and J. Novák. "A jigsaw puzzle metamaterial concept." Composite Structures 202 (October 2018): 1275–79. http://dx.doi.org/10.1016/j.compstruct.2018.06.015.

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16

Wood, David. "Completing the Accessibility Jigsaw Puzzle." SMPTE Motion Imaging Journal 129, no. 8 (September 2020): 132–36. http://dx.doi.org/10.5594/jmi.2020.3001771.

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17

Unuma, H., H. Hasegawa, and P. Kellman. "Perceptual Learning in Jigsaw Puzzle." Journal of Vision 12, no. 9 (August 10, 2012): 688. http://dx.doi.org/10.1167/12.9.688.

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18

Irviantina, Syanti, Pahala Sirait, Rudi Chandra, Ricky -, and Luis Tono. "Kajian Algoritma Upgraded Artificial Bee Colony dalam Pencarian Solusi Square Jigsaw Puzzle." Jurnal SIFO Mikroskil 18, no. 1 (April 25, 2017): 11–20. http://dx.doi.org/10.55601/jsm.v18i1.429.

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Pada penyelesaian square jigsaw puzzle, pencarian solusi untuk setiap potongan puzzle menjadi permasalahan utama. Dalam penyelesaiannya, informasi yang tersedia pada setiap potongan hanya berupa nilai red green blue (RGB). Dengan menggunakan nilai RGB, didapatkan nilai perbedaan antar potongan (fitness) yang menjadi dasar untuk menyelesaikan square jigsaw puzzle. Algoritma yang dapat diterapkan untuk menyelesaikan permasalahan tersebut adalah algoritma Upgraded Artificial Bee Colony (UABC) yang belum pernah menyelesaikan permasalahan citra. Pengujian dilakukan dengan mengukur ketepatan hasil penyelesaian aplikasi, mengetahui pengaruh parameter size population (SP), maximum cycle number (MCN), modification rate for employeed (MRE), dan modification rate for onlooker (MRO) pada hasil ketepatan yang diperoleh. Hasil pengujian menunjukkan algoritma UABC mampu menyelesaikan permasalahan square jigsaw puzzle dengan nilai ketepatan yang baik serta dengan meningkatkan parameter SP, MCN, MRE, dan MRO maka hasil ketepatan yang diperoleh juga semakin baik.

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19

Chen, Lifang, Dai Cao, and Yuan Liu. "A New Intelligent Jigsaw Puzzle Algorithm Base on Mixed Similarity and Symbol Matrix." International Journal of Pattern Recognition and Artificial Intelligence 32, no. 02 (November 12, 2017): 1859001. http://dx.doi.org/10.1142/s0218001418590012.

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Jigsaw puzzle algorithm is important as it can be applied to many areas such as biology, image editing, archaeology and incomplete crime-scene reconstruction. But, still, some problems exist in the process of practical application, for example, when there are a large number of similar objects in the puzzle fragments, the error rate will reach 30%–50%. When some fragments are missing, most algorithms fail to restore the images accurately. When the number of fragments of the jigsaw puzzle is large, efficiency is reduced. During the intelligent puzzle, mainly the Sum of Squared Distance Scoring (SSD), Mahalanobis Gradient Compatibility (MGC) and other metrics are used to calculate the similarity between the fragments. On the basis of these two measures, we put forward some new methods: 1. MGC is one of the most effective measures, but using MGC to reassemble the puzzle can cause an error image every 30 or 50 times, so we combine the Jaccard and MGC metric measure to compute the similarity between the image fragments, and reassemble the puzzle with a greedy algorithm. This algorithm not only reduces the error rate, but can also maintain a high accuracy in the case of a large number of fragments of similar objects. 2. For the lack of fragmentation and low efficiency, this paper uses a new method of SSD measurement and mark matrix, it is general in the sense that it can handle puzzles of unknown size, with fragments of unknown orientation, and even puzzles with missing fragments. The algorithm does not require any preset conditions and is more practical in real life. Finally, experiments show that the algorithm proposed in this paper improves not only the accuracy but also the efficiency of the operation.

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20

Maghfirotun, Khubni, and Mukaromah Lilya Sari. "Efektifitas Penerapan Media Jigsaw Puzzle terhadap Minat Belajar Peserta Didik Kelas V Madrasah Ibtidaiah." IBTIDA 3, no. 02 (November 16, 2022): 198–210. http://dx.doi.org/10.37850/ibtida.v3i02.366.

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This study aims to determine the learning students' interest of Class V MI Islmaiyah Bumiayu Baureno before implementing Jigsaw Puzzle in Fiqh learning; to recognize the interest after the application of Jigsaw puzzle media; to determine the effectiveness of Jigsaw puzzle media on learning interest. This research was a quantitative research through experimental methods (one group design) and carried out at MI Islamiyah Bumiayu students' attention, interest, thoughts and feelings ollected by random sampling. This study contained an independent variable, namely Jigsaw puzzle media while the dependent variable was the students interest. Data collection methods used questionnaires and observation. Validity test was analyzed using SPPSS version 25 as well as reliability test and data analysis techniques used percentage descriptive analysis. The normality test used table on-sample on SPSS version 25, as well as the Homogeneity test. Hypothesis analysis used T-test in SPSS version 25. Based on the result data analysis of the study, the students interest before the application of Jigsaw puzzle media showed in the low category with a percentage value of 60% and the acquisition of an average value of 50,80. Besides, after the application andia showed at a very high category in the number category value 84-100 was 76% with the acquisition of the average value of 86,28. Thus, this media is effective in increasing the students' interest in learning, with the values of one sample t test results were Tcount > Ttable and 55,39 > 2,06.

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21

Mayo, MA, Charles C. "The jigsaw puzzle of emergency planning." Journal of Emergency Management 2, no. 1 (January 1, 2004): 13. http://dx.doi.org/10.5055/jem.2004.0004.

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22

Mahajan, Vaani, Harleen Kaur, Munish Singla, Rupinder Bansal, and Litik Mittal. "Nasopalatine duct cyst: A jigsaw puzzle." IP Indian Journal of Conservative and Endodontics 6, no. 3 (September 15, 2021): 185–88. http://dx.doi.org/10.18231/j.ijce.2021.040.

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For the success of endodontic treatment outcome, diagnosis plays a very important role. Endodontic diagnosis is similar to a jigsaw puzzle which cannot be made from a single isolated piece of information. Radiography plays a vital role in diagnosing dental diseases. Overcoming the major disadvantage of two dimensional imaging of superimposing the dento-alveolar structures, 3 dimensional images by Cone Beam Computed Tomography is of great help. It is very common that when radiographs show a superimposition of the incisive foramen over the apex of maxillary central incisors, mimicking apical periodontitis, unnecessary endodontic treatment or retreatment may be prescribed. Diseases of non endodontic origin that affect the tooth apex, such as Nasopalatine duct cyst, should be included in the differential diagnosis. In the present case report the role of CBCT in diagnosis is being discussed.

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23

Corcoran, Simon. "Galerius’ jigsaw puzzle: the Caesariani dossier." Antiquité Tardive 15 (January 2007): 221–50. http://dx.doi.org/10.1484/j.at.2.303120.

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24

Dieleman, Peter, Niek Vasmel, Scott Waitukaitis, and Martin van Hecke. "Jigsaw puzzle design of pluripotent origami." Nature Physics 16, no. 1 (October 14, 2019): 63–68. http://dx.doi.org/10.1038/s41567-019-0677-3.

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25

Komesaroff, Paul A. "Filling in the Acupuncture Jigsaw Puzzle." Endocrinology 156, no. 10 (October 1, 2015): 3483–84. http://dx.doi.org/10.1210/en.2015-1734.

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26

Torsvik, T. H. "GEOLOGY: Enhanced: The Rodinia Jigsaw Puzzle." Science 300, no. 5624 (May 30, 2003): 1379–81. http://dx.doi.org/10.1126/science.1083469.

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27

Shatkin, Aaron, Kalyan Das, and Eddy Arnold. "3D Jigsaw Puzzle in Rotavirus Assembly." Structure 16, no. 11 (November 2008): 1601–2. http://dx.doi.org/10.1016/j.str.2008.10.004.

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28

Bengtson, Stefan. "The solution to a jigsaw puzzle." Nature 345, no. 6278 (June 1990): 765–66. http://dx.doi.org/10.1038/345765a0.

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29

Field, Kenneth. "Cartography is a Big Jigsaw Puzzle." Cartographic Journal 44, no. 4 (December 2007): 287–91. http://dx.doi.org/10.1179/000870407x241836.

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30

Smith, Philip T. "A jigsaw puzzle theory of memory." Memory 8, no. 4 (July 2000): 245–64. http://dx.doi.org/10.1080/096582100406801.

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31

Jasny, B. "BIOCHEMISTRY: Assembling a Protein Jigsaw Puzzle." Science 287, no. 5457 (February 25, 2000): 1365e—1365. http://dx.doi.org/10.1126/science.287.5457.1365e.

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32

Eppig, J. "Comparative maps: the mammalian jigsaw puzzle." Current Opinion in Genetics & Development 5, no. 6 (December 1995): 709–16. http://dx.doi.org/10.1016/0959-437x(95)80002-m.

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33

Orlov, A. V., and V. N. Belimov. "Adult game of “jigsaw puzzle”. Interview." Municipality: Economics and Management, no. 3 (2022): 6–11. http://dx.doi.org/10.22394/2304-3385-2022-3-6-11.

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34

Harsadi, Paulus, Sri Siswanti, and Sanjai Kurniawan. "IMPLEMENTASI LINEAR CONGRUENT METHOD PADA GAME JIGSAW PUZZLE TOKOH PEWAYANGAN." JuSiTik : Jurnal Sistem dan Teknologi Informasi Komunikasi 6, no. 1 (February 8, 2023): 23–27. http://dx.doi.org/10.32524/jusitik.v6i1.788.

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Keanekaragaman suku dan perbedaan geografis membuat Indonesia kaya akan berbagai budaya. tentang wayang yang sudah banyak diketahui masyarakat Indonesia, namun kini masyarakat Indonesia semakin melupakan cerita rakyat dari dalam negeri dan lebih memilih mengidolakan tokoh cerita luar negeri karena kebanyakan berada di luar negeri dalam menyampaikan konten cerita menjadi video game yang tampilannya menarik. Oleh karena itu, agar masyarakat khususnya anak-anak tertarik dengan tokoh wayang maka dibuatlah permainan puzzle jigsaw lima wayang Pandawa berbasis android dengan tampilan yang menarik dan modern. Penelitian ini bertujuan agar anak kecil dan orang dewasa tertarik dengan tokoh wayang, maka dibuatlah “Permainan Jigsaw Puzzle Karakter Wayang Pandawa Lima Menggunakan Metode Kongruen Linier”. Dari hasil pengujian data pengacakan puzzle, terbukti bahwa metode LCM dapat diimplementasikan dalam Pengacakan Puzzle Game Piece. Dari kuisioner yang diperoleh dapat diperoleh hasil kuisioner sebesar 87,25% sehingga dalam penggunaan Game Puzzle Pandawa Lima termasuk dalam kategori Baik.

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35

Grim, Anna, Timothy O’Connor, Peter J. Olver, Chehrzad Shakiban, Ryan Slechta, and Robert Thompson. "Automatic Reassembly of Three-Dimensional Jigsaw Puzzles." International Journal of Image and Graphics 16, no. 02 (April 2016): 1650009. http://dx.doi.org/10.1142/s0219467816500091.

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In this paper, we present an effective algorithm for reassembling three-dimensional apictorial jigsaw puzzles obtained by dividing a curved surface into a finite number of interlocking pieces. As such, our algorithm does not make use of any picture or design that may be painted on the surface; nor does it require a priori knowledge of the overall shape of the original surface. A motivating example is the problem of virtually reconstructing a broken ostrich egg shell. In order to develop and test the algorithm, we also devise a method for constructing synthetic three-dimensional puzzles by randomly distributing points on a compact surface with respect to surface area measure, then determining the induced Voronoi tessellation, and finally curving the Voronoi edges by using Bezier curves with selected control points. Our edge-matching algorithm relies on the method of Euclidean signature curves. The edges of the puzzle pieces are divided into bivertex arcs, whose signatures are directly compared. The algorithm has been programmed in Matlab and is able to successfully reassemble a broad range of artificial puzzles, including those subjected to a reasonable amount of noise. Moreover, significant progress has been made on reassembly of the real-world ostrich egg data.

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36

Da Silva, Thiago Fachetti, Rita de Cássia Duarte Lima, Ana Cláudia Pinheiro Garcia, Maria Angélica Carvalho Andrade, and Tania Cristina França da Silva. "Comissões de Integração Ensino-Serviço: (des)montando os quebra-cabeças da Educação Permanente." Revista Brasileira de Pesquisa em Saúde/Brazilian Journal of Health Research 20, no. 4 (May 13, 2019): 120–28. http://dx.doi.org/10.21722/rbps.v20i4.24607.

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37

Freir, Vee, Marie Gordon, John Richmond, and Diane Wheeler. "The jigsaw puzzle of a multidisciplinary team." Cancer Nursing Practice 3, no. 3 (April 2004): 19–21. http://dx.doi.org/10.7748/cnp.3.3.19.s12.

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38

Fendel, Victoria. "The missing piece in the jigsaw puzzle." Written Language and Literacy 24, no. 2 (December 31, 2021): 198–228. http://dx.doi.org/10.1075/wll.00053.fen.

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Abstract Past research approached the origins of the Coptic alphabet sociolinguistically and empirically. Neither can fully explain the comparatively sudden and fundamental change from a supraphonemic to a phonemic writing system for Egyptian around the second century AD. This paper adds the cognitive-linguistic concept of the grain size of a writing system to the picture. In essence, by the second century, sound changes in Egyptian had resulted in a phonological structure of the language that mapped more easily onto a phonemic writing system than previous stages of the language. This coincided with socio-political developments favouring the Greek alphabet. As a result, multiple writing systems, which shared the underlying structure, alphabetic, and model, the Greek alphabet, emerged. Eventually, one of these prevailed, the Coptic alphabet.

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39

Yeh, Chia-Hung. "Jigsaw-puzzle vector quantization for image compression." Optical Engineering 43, no. 2 (February 1, 2004): 363. http://dx.doi.org/10.1117/1.1633777.

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40

Ericsson, Ulf, Sören Augustinsson, and Pär Pettersson. "A Jigsaw Puzzle with No Given Solution." Labor Studies Journal 39, no. 4 (December 2014): 278–96. http://dx.doi.org/10.1177/0160449x14567808.

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41

Etienne, Denzil, Tagore Sunkara, Brian Chiong, and Vinaya Gaduputi. "A Jigsaw Puzzle of Celiac Sprue: Solved." American Journal of Gastroenterology 111 (October 2016): S1026—S1027. http://dx.doi.org/10.14309/00000434-201610001-02150.

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42

Boillée, Séverine, Marc Peschanski, and Marie-Pierre Junier. "The Wobbler Mouse: A Neurodegeneration Jigsaw Puzzle." Molecular Neurobiology 28, no. 1 (2003): 65–106. http://dx.doi.org/10.1385/mn:28:1:65.

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43

van de Wetering, E. J., N. J. A. van Exel, and W. B. F. Brouwer. "Piecing the jigsaw puzzle of adolescent happiness." Journal of Economic Psychology 31, no. 6 (December 2010): 923–35. http://dx.doi.org/10.1016/j.joep.2010.08.004.

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44

Rojkind, Marcos, George Philips, and Anna Mae Diehl. "Microarchitecture of the liver: A Jigsaw puzzle." Journal of Hepatology 54, no. 1 (January 2011): 187–88. http://dx.doi.org/10.1016/j.jhep.2010.09.004.

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45

Tsiklauri, David. "Missing pieces of the solar jigsaw puzzle." Astronomy & Geophysics 50, no. 5 (October 2009): 5.32–5.38. http://dx.doi.org/10.1111/j.1468-4004.2009.50532.x.

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46

Marande, W., and G. Burger. "Mitochondrial DNA as a Genomic Jigsaw Puzzle." Science 318, no. 5849 (October 19, 2007): 415. http://dx.doi.org/10.1126/science.1148033.

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47

Duarte, Ana Patrícia, Daniel Roque Gomes, and José Gonçalves das Neves. "Finding the jigsaw piece for our jigsaw puzzle with corporate social responsibility." Management Research: The Journal of the Iberoamerican Academy of Management 12, no. 3 (November 17, 2014): 240–58. http://dx.doi.org/10.1108/mrjiam-11-2013-0532.

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Purpose – This study aims to examine the influence of different corporate social responsibility (CSR) dimensions on prospective applicants’ responses, namely, organizational attractiveness and intention to apply for a job vacancy (IAJV). Design/methodology/approach – Using an experimental 2 × 3 crossed factorial design (n = 195), the level of engagement of a hypothetical company in socially responsible practices (high vs low) was manipulated concerning three dimensions of CSR (employees, community and environment and economic level). Participants were randomly assigned to one of the six conditions and, after reading the corresponding scenario, were asked to evaluate the extent to which the company was considered a good place to work and their IAJV in it. Findings – The level of engagement in socially responsible practices had a positive effect both on the degree to which participants favorably perceived the organization as a place to work and on their IAJV. Furthermore, the level of engagement in practices toward employees and in the economic domain had a stronger effect on participants’ responses than the engagement in practices that benefit community and environment. Research limitations/implications – Data were obtained in a laboratory setting, so the generalization of results to actual job search settings must be made with caution. Practical implications – CSR can be a source of competitive advantage in the recruitment of new employees. Because not all CSR dimensions have the same effect on applicants’ responses, companies should take into account the CSR dimensions in which they are engaged and communicate them to the public. Originality/value – As far as we know, this is the first study to examine the impact of different CSR dimensions both on organizational attractiveness and IAJV.

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48

Karp, Karen S., and E. Todd Brown. "Geo-Dolls: Traveling in a Mathematical World." Teaching Children Mathematics 8, no. 3 (November 2001): 132–38. http://dx.doi.org/10.5951/tcm.8.3.0132.

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What do putting a jigsaw puzzle together and structuring a curriculum have in common? James Beane (1995) drew a connection between the two endeavors when he observed that as we begin to put a puzzle together, we often take a single piece and try to identify the portion of the puzzle to which it belongs. We place it in a spot to wait for adjacent pieces to be found. Then we connect sections and clusters of pieces, giving them directionality and location as we refer to the picture on the puzzle's box for guidance. “None of the pieces means anything taken alone; only when the pieces are put together do they mean something” (Beane 1995, p. 1). Putting a puzzle together without a picture is seen as a particularly challenging task and, at times, a frustrating experience.

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49

Isaacs, Carol, and Julie Fisher. "Sharing Teaching Ideas: Puzzles, Puzzles,…" Mathematics Teacher 85, no. 4 (April 1992): 278–79. http://dx.doi.org/10.5951/mt.85.4.0278.

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… and more puzzles. Laura is trying to fit tangram pieces into the outline on a worksheet. Sergei is maneuvering a marble through a wooden maze while Brad is manipulating a ball using two poles in a game called “shoot the integer,” in which students try to score the highest number possible. Jessica is working on a jigsaw puzzle that has a plus sign on one side and a minus sign on the other. A classroom visitor would think that Fairfax County spends all its money on puzzles! Actually, all these puzzles were made by our students.

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MARTINSSON, ANDERS. "A Linear Threshold for Uniqueness of Solutions to Random Jigsaw Puzzles." Combinatorics, Probability and Computing 28, no. 2 (January 8, 2019): 287–302. http://dx.doi.org/10.1017/s0963548318000391.

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We consider a problem introduced by Mossel and Ross (‘Shotgun assembly of labeled graphs’, arXiv:1504.07682). Suppose a random n × n jigsaw puzzle is constructed by independently and uniformly choosing the shape of each ‘jig’ from q possibilities. We are given the shuffled pieces. Then, depending on q, what is the probability that we can reassemble the puzzle uniquely? We say that two solutions of a puzzle are similar if they only differ by a global rotation of the puzzle, permutation of duplicate pieces, and rotation of rotationally symmetric pieces. In this paper, we show that, with high probability, such a puzzle has at least two non-similar solutions when 2 ⩽ q ⩽ 2e−1/2n, all solutions are similar when q ⩾ (2+ϵ)n, and the solution is unique when q = ω(n).

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